diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/cifs/cifssmb.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/cifs/cifssmb.c | 6504 |
1 files changed, 0 insertions, 6504 deletions
diff --git a/ANDROID_3.4.5/fs/cifs/cifssmb.c b/ANDROID_3.4.5/fs/cifs/cifssmb.c deleted file mode 100644 index 6b79efd7..00000000 --- a/ANDROID_3.4.5/fs/cifs/cifssmb.c +++ /dev/null @@ -1,6504 +0,0 @@ -/* - * fs/cifs/cifssmb.c - * - * Copyright (C) International Business Machines Corp., 2002,2010 - * Author(s): Steve French (sfrench@us.ibm.com) - * - * Contains the routines for constructing the SMB PDUs themselves - * - * This library is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published - * by the Free Software Foundation; either version 2.1 of the License, or - * (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - * the GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - - /* SMB/CIFS PDU handling routines here - except for leftovers in connect.c */ - /* These are mostly routines that operate on a pathname, or on a tree id */ - /* (mounted volume), but there are eight handle based routines which must be */ - /* treated slightly differently for reconnection purposes since we never */ - /* want to reuse a stale file handle and only the caller knows the file info */ - -#include <linux/fs.h> -#include <linux/kernel.h> -#include <linux/vfs.h> -#include <linux/slab.h> -#include <linux/posix_acl_xattr.h> -#include <linux/pagemap.h> -#include <linux/swap.h> -#include <linux/task_io_accounting_ops.h> -#include <asm/uaccess.h> -#include "cifspdu.h" -#include "cifsglob.h" -#include "cifsacl.h" -#include "cifsproto.h" -#include "cifs_unicode.h" -#include "cifs_debug.h" -#include "fscache.h" - -#ifdef CONFIG_CIFS_POSIX -static struct { - int index; - char *name; -} protocols[] = { -#ifdef CONFIG_CIFS_WEAK_PW_HASH - {LANMAN_PROT, "\2LM1.2X002"}, - {LANMAN2_PROT, "\2LANMAN2.1"}, -#endif /* weak password hashing for legacy clients */ - {CIFS_PROT, "\2NT LM 0.12"}, - {POSIX_PROT, "\2POSIX 2"}, - {BAD_PROT, "\2"} -}; -#else -static struct { - int index; - char *name; -} protocols[] = { -#ifdef CONFIG_CIFS_WEAK_PW_HASH - {LANMAN_PROT, "\2LM1.2X002"}, - {LANMAN2_PROT, "\2LANMAN2.1"}, -#endif /* weak password hashing for legacy clients */ - {CIFS_PROT, "\2NT LM 0.12"}, - {BAD_PROT, "\2"} -}; -#endif - -/* define the number of elements in the cifs dialect array */ -#ifdef CONFIG_CIFS_POSIX -#ifdef CONFIG_CIFS_WEAK_PW_HASH -#define CIFS_NUM_PROT 4 -#else -#define CIFS_NUM_PROT 2 -#endif /* CIFS_WEAK_PW_HASH */ -#else /* not posix */ -#ifdef CONFIG_CIFS_WEAK_PW_HASH -#define CIFS_NUM_PROT 3 -#else -#define CIFS_NUM_PROT 1 -#endif /* CONFIG_CIFS_WEAK_PW_HASH */ -#endif /* CIFS_POSIX */ - -/* Forward declarations */ -static void cifs_readv_complete(struct work_struct *work); - -/* Mark as invalid, all open files on tree connections since they - were closed when session to server was lost */ -static void mark_open_files_invalid(struct cifs_tcon *pTcon) -{ - struct cifsFileInfo *open_file = NULL; - struct list_head *tmp; - struct list_head *tmp1; - -/* list all files open on tree connection and mark them invalid */ - spin_lock(&cifs_file_list_lock); - list_for_each_safe(tmp, tmp1, &pTcon->openFileList) { - open_file = list_entry(tmp, struct cifsFileInfo, tlist); - open_file->invalidHandle = true; - open_file->oplock_break_cancelled = true; - } - spin_unlock(&cifs_file_list_lock); - /* BB Add call to invalidate_inodes(sb) for all superblocks mounted - to this tcon */ -} - -/* reconnect the socket, tcon, and smb session if needed */ -static int -cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) -{ - int rc; - struct cifs_ses *ses; - struct TCP_Server_Info *server; - struct nls_table *nls_codepage; - - /* - * SMBs NegProt, SessSetup, uLogoff do not have tcon yet so check for - * tcp and smb session status done differently for those three - in the - * calling routine - */ - if (!tcon) - return 0; - - ses = tcon->ses; - server = ses->server; - - /* - * only tree disconnect, open, and write, (and ulogoff which does not - * have tcon) are allowed as we start force umount - */ - if (tcon->tidStatus == CifsExiting) { - if (smb_command != SMB_COM_WRITE_ANDX && - smb_command != SMB_COM_OPEN_ANDX && - smb_command != SMB_COM_TREE_DISCONNECT) { - cFYI(1, "can not send cmd %d while umounting", - smb_command); - return -ENODEV; - } - } - - /* - * Give demultiplex thread up to 10 seconds to reconnect, should be - * greater than cifs socket timeout which is 7 seconds - */ - while (server->tcpStatus == CifsNeedReconnect) { - wait_event_interruptible_timeout(server->response_q, - (server->tcpStatus != CifsNeedReconnect), 10 * HZ); - - /* are we still trying to reconnect? */ - if (server->tcpStatus != CifsNeedReconnect) - break; - - /* - * on "soft" mounts we wait once. Hard mounts keep - * retrying until process is killed or server comes - * back on-line - */ - if (!tcon->retry) { - cFYI(1, "gave up waiting on reconnect in smb_init"); - return -EHOSTDOWN; - } - } - - if (!ses->need_reconnect && !tcon->need_reconnect) - return 0; - - nls_codepage = load_nls_default(); - - /* - * need to prevent multiple threads trying to simultaneously - * reconnect the same SMB session - */ - mutex_lock(&ses->session_mutex); - rc = cifs_negotiate_protocol(0, ses); - if (rc == 0 && ses->need_reconnect) - rc = cifs_setup_session(0, ses, nls_codepage); - - /* do we need to reconnect tcon? */ - if (rc || !tcon->need_reconnect) { - mutex_unlock(&ses->session_mutex); - goto out; - } - - mark_open_files_invalid(tcon); - rc = CIFSTCon(0, ses, tcon->treeName, tcon, nls_codepage); - mutex_unlock(&ses->session_mutex); - cFYI(1, "reconnect tcon rc = %d", rc); - - if (rc) - goto out; - - /* - * FIXME: check if wsize needs updated due to negotiated smb buffer - * size shrinking - */ - atomic_inc(&tconInfoReconnectCount); - - /* tell server Unix caps we support */ - if (ses->capabilities & CAP_UNIX) - reset_cifs_unix_caps(0, tcon, NULL, NULL); - - /* - * Removed call to reopen open files here. It is safer (and faster) to - * reopen files one at a time as needed in read and write. - * - * FIXME: what about file locks? don't we need to reclaim them ASAP? - */ - -out: - /* - * Check if handle based operation so we know whether we can continue - * or not without returning to caller to reset file handle - */ - switch (smb_command) { - case SMB_COM_READ_ANDX: - case SMB_COM_WRITE_ANDX: - case SMB_COM_CLOSE: - case SMB_COM_FIND_CLOSE2: - case SMB_COM_LOCKING_ANDX: - rc = -EAGAIN; - } - - unload_nls(nls_codepage); - return rc; -} - -/* Allocate and return pointer to an SMB request buffer, and set basic - SMB information in the SMB header. If the return code is zero, this - function must have filled in request_buf pointer */ -static int -small_smb_init(int smb_command, int wct, struct cifs_tcon *tcon, - void **request_buf) -{ - int rc; - - rc = cifs_reconnect_tcon(tcon, smb_command); - if (rc) - return rc; - - *request_buf = cifs_small_buf_get(); - if (*request_buf == NULL) { - /* BB should we add a retry in here if not a writepage? */ - return -ENOMEM; - } - - header_assemble((struct smb_hdr *) *request_buf, smb_command, - tcon, wct); - - if (tcon != NULL) - cifs_stats_inc(&tcon->num_smbs_sent); - - return 0; -} - -int -small_smb_init_no_tc(const int smb_command, const int wct, - struct cifs_ses *ses, void **request_buf) -{ - int rc; - struct smb_hdr *buffer; - - rc = small_smb_init(smb_command, wct, NULL, request_buf); - if (rc) - return rc; - - buffer = (struct smb_hdr *)*request_buf; - buffer->Mid = GetNextMid(ses->server); - if (ses->capabilities & CAP_UNICODE) - buffer->Flags2 |= SMBFLG2_UNICODE; - if (ses->capabilities & CAP_STATUS32) - buffer->Flags2 |= SMBFLG2_ERR_STATUS; - - /* uid, tid can stay at zero as set in header assemble */ - - /* BB add support for turning on the signing when - this function is used after 1st of session setup requests */ - - return rc; -} - -/* If the return code is zero, this function must fill in request_buf pointer */ -static int -__smb_init(int smb_command, int wct, struct cifs_tcon *tcon, - void **request_buf, void **response_buf) -{ - *request_buf = cifs_buf_get(); - if (*request_buf == NULL) { - /* BB should we add a retry in here if not a writepage? */ - return -ENOMEM; - } - /* Although the original thought was we needed the response buf for */ - /* potential retries of smb operations it turns out we can determine */ - /* from the mid flags when the request buffer can be resent without */ - /* having to use a second distinct buffer for the response */ - if (response_buf) - *response_buf = *request_buf; - - header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon, - wct); - - if (tcon != NULL) - cifs_stats_inc(&tcon->num_smbs_sent); - - return 0; -} - -/* If the return code is zero, this function must fill in request_buf pointer */ -static int -smb_init(int smb_command, int wct, struct cifs_tcon *tcon, - void **request_buf, void **response_buf) -{ - int rc; - - rc = cifs_reconnect_tcon(tcon, smb_command); - if (rc) - return rc; - - return __smb_init(smb_command, wct, tcon, request_buf, response_buf); -} - -static int -smb_init_no_reconnect(int smb_command, int wct, struct cifs_tcon *tcon, - void **request_buf, void **response_buf) -{ - if (tcon->ses->need_reconnect || tcon->need_reconnect) - return -EHOSTDOWN; - - return __smb_init(smb_command, wct, tcon, request_buf, response_buf); -} - -static int validate_t2(struct smb_t2_rsp *pSMB) -{ - unsigned int total_size; - - /* check for plausible wct */ - if (pSMB->hdr.WordCount < 10) - goto vt2_err; - - /* check for parm and data offset going beyond end of smb */ - if (get_unaligned_le16(&pSMB->t2_rsp.ParameterOffset) > 1024 || - get_unaligned_le16(&pSMB->t2_rsp.DataOffset) > 1024) - goto vt2_err; - - total_size = get_unaligned_le16(&pSMB->t2_rsp.ParameterCount); - if (total_size >= 512) - goto vt2_err; - - /* check that bcc is at least as big as parms + data, and that it is - * less than negotiated smb buffer - */ - total_size += get_unaligned_le16(&pSMB->t2_rsp.DataCount); - if (total_size > get_bcc(&pSMB->hdr) || - total_size >= CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) - goto vt2_err; - - return 0; -vt2_err: - cifs_dump_mem("Invalid transact2 SMB: ", (char *)pSMB, - sizeof(struct smb_t2_rsp) + 16); - return -EINVAL; -} - -static inline void inc_rfc1001_len(void *pSMB, int count) -{ - struct smb_hdr *hdr = (struct smb_hdr *)pSMB; - - be32_add_cpu(&hdr->smb_buf_length, count); -} - -int -CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses) -{ - NEGOTIATE_REQ *pSMB; - NEGOTIATE_RSP *pSMBr; - int rc = 0; - int bytes_returned; - int i; - struct TCP_Server_Info *server; - u16 count; - unsigned int secFlags; - - if (ses->server) - server = ses->server; - else { - rc = -EIO; - return rc; - } - rc = smb_init(SMB_COM_NEGOTIATE, 0, NULL /* no tcon yet */ , - (void **) &pSMB, (void **) &pSMBr); - if (rc) - return rc; - - /* if any of auth flags (ie not sign or seal) are overriden use them */ - if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) - secFlags = ses->overrideSecFlg; /* BB FIXME fix sign flags? */ - else /* if override flags set only sign/seal OR them with global auth */ - secFlags = global_secflags | ses->overrideSecFlg; - - cFYI(1, "secFlags 0x%x", secFlags); - - pSMB->hdr.Mid = GetNextMid(server); - pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS); - - if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) - pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; - else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) { - cFYI(1, "Kerberos only mechanism, enable extended security"); - pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; - } else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) - pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; - else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP) { - cFYI(1, "NTLMSSP only mechanism, enable extended security"); - pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; - } - - count = 0; - for (i = 0; i < CIFS_NUM_PROT; i++) { - strncpy(pSMB->DialectsArray+count, protocols[i].name, 16); - count += strlen(protocols[i].name) + 1; - /* null at end of source and target buffers anyway */ - } - inc_rfc1001_len(pSMB, count); - pSMB->ByteCount = cpu_to_le16(count); - - rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc != 0) - goto neg_err_exit; - - server->dialect = le16_to_cpu(pSMBr->DialectIndex); - cFYI(1, "Dialect: %d", server->dialect); - /* Check wct = 1 error case */ - if ((pSMBr->hdr.WordCount < 13) || (server->dialect == BAD_PROT)) { - /* core returns wct = 1, but we do not ask for core - otherwise - small wct just comes when dialect index is -1 indicating we - could not negotiate a common dialect */ - rc = -EOPNOTSUPP; - goto neg_err_exit; -#ifdef CONFIG_CIFS_WEAK_PW_HASH - } else if ((pSMBr->hdr.WordCount == 13) - && ((server->dialect == LANMAN_PROT) - || (server->dialect == LANMAN2_PROT))) { - __s16 tmp; - struct lanman_neg_rsp *rsp = (struct lanman_neg_rsp *)pSMBr; - - if ((secFlags & CIFSSEC_MAY_LANMAN) || - (secFlags & CIFSSEC_MAY_PLNTXT)) - server->secType = LANMAN; - else { - cERROR(1, "mount failed weak security disabled" - " in /proc/fs/cifs/SecurityFlags"); - rc = -EOPNOTSUPP; - goto neg_err_exit; - } - server->sec_mode = (__u8)le16_to_cpu(rsp->SecurityMode); - server->maxReq = min_t(unsigned int, - le16_to_cpu(rsp->MaxMpxCount), - cifs_max_pending); - cifs_set_credits(server, server->maxReq); - server->maxBuf = le16_to_cpu(rsp->MaxBufSize); - server->max_vcs = le16_to_cpu(rsp->MaxNumberVcs); - /* even though we do not use raw we might as well set this - accurately, in case we ever find a need for it */ - if ((le16_to_cpu(rsp->RawMode) & RAW_ENABLE) == RAW_ENABLE) { - server->max_rw = 0xFF00; - server->capabilities = CAP_MPX_MODE | CAP_RAW_MODE; - } else { - server->max_rw = 0;/* do not need to use raw anyway */ - server->capabilities = CAP_MPX_MODE; - } - tmp = (__s16)le16_to_cpu(rsp->ServerTimeZone); - if (tmp == -1) { - /* OS/2 often does not set timezone therefore - * we must use server time to calc time zone. - * Could deviate slightly from the right zone. - * Smallest defined timezone difference is 15 minutes - * (i.e. Nepal). Rounding up/down is done to match - * this requirement. - */ - int val, seconds, remain, result; - struct timespec ts, utc; - utc = CURRENT_TIME; - ts = cnvrtDosUnixTm(rsp->SrvTime.Date, - rsp->SrvTime.Time, 0); - cFYI(1, "SrvTime %d sec since 1970 (utc: %d) diff: %d", - (int)ts.tv_sec, (int)utc.tv_sec, - (int)(utc.tv_sec - ts.tv_sec)); - val = (int)(utc.tv_sec - ts.tv_sec); - seconds = abs(val); - result = (seconds / MIN_TZ_ADJ) * MIN_TZ_ADJ; - remain = seconds % MIN_TZ_ADJ; - if (remain >= (MIN_TZ_ADJ / 2)) - result += MIN_TZ_ADJ; - if (val < 0) - result = -result; - server->timeAdj = result; - } else { - server->timeAdj = (int)tmp; - server->timeAdj *= 60; /* also in seconds */ - } - cFYI(1, "server->timeAdj: %d seconds", server->timeAdj); - - - /* BB get server time for time conversions and add - code to use it and timezone since this is not UTC */ - - if (rsp->EncryptionKeyLength == - cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) { - memcpy(ses->server->cryptkey, rsp->EncryptionKey, - CIFS_CRYPTO_KEY_SIZE); - } else if (server->sec_mode & SECMODE_PW_ENCRYPT) { - rc = -EIO; /* need cryptkey unless plain text */ - goto neg_err_exit; - } - - cFYI(1, "LANMAN negotiated"); - /* we will not end up setting signing flags - as no signing - was in LANMAN and server did not return the flags on */ - goto signing_check; -#else /* weak security disabled */ - } else if (pSMBr->hdr.WordCount == 13) { - cERROR(1, "mount failed, cifs module not built " - "with CIFS_WEAK_PW_HASH support"); - rc = -EOPNOTSUPP; -#endif /* WEAK_PW_HASH */ - goto neg_err_exit; - } else if (pSMBr->hdr.WordCount != 17) { - /* unknown wct */ - rc = -EOPNOTSUPP; - goto neg_err_exit; - } - /* else wct == 17 NTLM */ - server->sec_mode = pSMBr->SecurityMode; - if ((server->sec_mode & SECMODE_USER) == 0) - cFYI(1, "share mode security"); - - if ((server->sec_mode & SECMODE_PW_ENCRYPT) == 0) -#ifdef CONFIG_CIFS_WEAK_PW_HASH - if ((secFlags & CIFSSEC_MAY_PLNTXT) == 0) -#endif /* CIFS_WEAK_PW_HASH */ - cERROR(1, "Server requests plain text password" - " but client support disabled"); - - if ((secFlags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2) - server->secType = NTLMv2; - else if (secFlags & CIFSSEC_MAY_NTLM) - server->secType = NTLM; - else if (secFlags & CIFSSEC_MAY_NTLMV2) - server->secType = NTLMv2; - else if (secFlags & CIFSSEC_MAY_KRB5) - server->secType = Kerberos; - else if (secFlags & CIFSSEC_MAY_NTLMSSP) - server->secType = RawNTLMSSP; - else if (secFlags & CIFSSEC_MAY_LANMAN) - server->secType = LANMAN; - else { - rc = -EOPNOTSUPP; - cERROR(1, "Invalid security type"); - goto neg_err_exit; - } - /* else ... any others ...? */ - - /* one byte, so no need to convert this or EncryptionKeyLen from - little endian */ - server->maxReq = min_t(unsigned int, le16_to_cpu(pSMBr->MaxMpxCount), - cifs_max_pending); - cifs_set_credits(server, server->maxReq); - /* probably no need to store and check maxvcs */ - server->maxBuf = le32_to_cpu(pSMBr->MaxBufferSize); - server->max_rw = le32_to_cpu(pSMBr->MaxRawSize); - cFYI(DBG2, "Max buf = %d", ses->server->maxBuf); - server->capabilities = le32_to_cpu(pSMBr->Capabilities); - server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone); - server->timeAdj *= 60; - if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) { - memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey, - CIFS_CRYPTO_KEY_SIZE); - } else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC || - server->capabilities & CAP_EXTENDED_SECURITY) && - (pSMBr->EncryptionKeyLength == 0)) { - /* decode security blob */ - count = get_bcc(&pSMBr->hdr); - if (count < 16) { - rc = -EIO; - goto neg_err_exit; - } - spin_lock(&cifs_tcp_ses_lock); - if (server->srv_count > 1) { - spin_unlock(&cifs_tcp_ses_lock); - if (memcmp(server->server_GUID, - pSMBr->u.extended_response. - GUID, 16) != 0) { - cFYI(1, "server UID changed"); - memcpy(server->server_GUID, - pSMBr->u.extended_response.GUID, - 16); - } - } else { - spin_unlock(&cifs_tcp_ses_lock); - memcpy(server->server_GUID, - pSMBr->u.extended_response.GUID, 16); - } - - if (count == 16) { - server->secType = RawNTLMSSP; - } else { - rc = decode_negTokenInit(pSMBr->u.extended_response. - SecurityBlob, count - 16, - server); - if (rc == 1) - rc = 0; - else - rc = -EINVAL; - if (server->secType == Kerberos) { - if (!server->sec_kerberos && - !server->sec_mskerberos) - rc = -EOPNOTSUPP; - } else if (server->secType == RawNTLMSSP) { - if (!server->sec_ntlmssp) - rc = -EOPNOTSUPP; - } else - rc = -EOPNOTSUPP; - } - } else if (server->sec_mode & SECMODE_PW_ENCRYPT) { - rc = -EIO; /* no crypt key only if plain text pwd */ - goto neg_err_exit; - } else - server->capabilities &= ~CAP_EXTENDED_SECURITY; - -#ifdef CONFIG_CIFS_WEAK_PW_HASH -signing_check: -#endif - if ((secFlags & CIFSSEC_MAY_SIGN) == 0) { - /* MUST_SIGN already includes the MAY_SIGN FLAG - so if this is zero it means that signing is disabled */ - cFYI(1, "Signing disabled"); - if (server->sec_mode & SECMODE_SIGN_REQUIRED) { - cERROR(1, "Server requires " - "packet signing to be enabled in " - "/proc/fs/cifs/SecurityFlags."); - rc = -EOPNOTSUPP; - } - server->sec_mode &= - ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); - } else if ((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) { - /* signing required */ - cFYI(1, "Must sign - secFlags 0x%x", secFlags); - if ((server->sec_mode & - (SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED)) == 0) { - cERROR(1, "signing required but server lacks support"); - rc = -EOPNOTSUPP; - } else - server->sec_mode |= SECMODE_SIGN_REQUIRED; - } else { - /* signing optional ie CIFSSEC_MAY_SIGN */ - if ((server->sec_mode & SECMODE_SIGN_REQUIRED) == 0) - server->sec_mode &= - ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); - } - -neg_err_exit: - cifs_buf_release(pSMB); - - cFYI(1, "negprot rc %d", rc); - return rc; -} - -int -CIFSSMBTDis(const int xid, struct cifs_tcon *tcon) -{ - struct smb_hdr *smb_buffer; - int rc = 0; - - cFYI(1, "In tree disconnect"); - - /* BB: do we need to check this? These should never be NULL. */ - if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) - return -EIO; - - /* - * No need to return error on this operation if tid invalidated and - * closed on server already e.g. due to tcp session crashing. Also, - * the tcon is no longer on the list, so no need to take lock before - * checking this. - */ - if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) - return 0; - - rc = small_smb_init(SMB_COM_TREE_DISCONNECT, 0, tcon, - (void **)&smb_buffer); - if (rc) - return rc; - - rc = SendReceiveNoRsp(xid, tcon->ses, (char *)smb_buffer, 0); - if (rc) - cFYI(1, "Tree disconnect failed %d", rc); - - /* No need to return error on this operation if tid invalidated and - closed on server already e.g. due to tcp session crashing */ - if (rc == -EAGAIN) - rc = 0; - - return rc; -} - -/* - * This is a no-op for now. We're not really interested in the reply, but - * rather in the fact that the server sent one and that server->lstrp - * gets updated. - * - * FIXME: maybe we should consider checking that the reply matches request? - */ -static void -cifs_echo_callback(struct mid_q_entry *mid) -{ - struct TCP_Server_Info *server = mid->callback_data; - - DeleteMidQEntry(mid); - cifs_add_credits(server, 1); -} - -int -CIFSSMBEcho(struct TCP_Server_Info *server) -{ - ECHO_REQ *smb; - int rc = 0; - struct kvec iov; - - cFYI(1, "In echo request"); - - rc = small_smb_init(SMB_COM_ECHO, 0, NULL, (void **)&smb); - if (rc) - return rc; - - /* set up echo request */ - smb->hdr.Tid = 0xffff; - smb->hdr.WordCount = 1; - put_unaligned_le16(1, &smb->EchoCount); - put_bcc(1, &smb->hdr); - smb->Data[0] = 'a'; - inc_rfc1001_len(smb, 3); - iov.iov_base = smb; - iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4; - - rc = cifs_call_async(server, &iov, 1, NULL, cifs_echo_callback, - server, true); - if (rc) - cFYI(1, "Echo request failed: %d", rc); - - cifs_small_buf_release(smb); - - return rc; -} - -int -CIFSSMBLogoff(const int xid, struct cifs_ses *ses) -{ - LOGOFF_ANDX_REQ *pSMB; - int rc = 0; - - cFYI(1, "In SMBLogoff for session disconnect"); - - /* - * BB: do we need to check validity of ses and server? They should - * always be valid since we have an active reference. If not, that - * should probably be a BUG() - */ - if (!ses || !ses->server) - return -EIO; - - mutex_lock(&ses->session_mutex); - if (ses->need_reconnect) - goto session_already_dead; /* no need to send SMBlogoff if uid - already closed due to reconnect */ - rc = small_smb_init(SMB_COM_LOGOFF_ANDX, 2, NULL, (void **)&pSMB); - if (rc) { - mutex_unlock(&ses->session_mutex); - return rc; - } - - pSMB->hdr.Mid = GetNextMid(ses->server); - - if (ses->server->sec_mode & - (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) - pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; - - pSMB->hdr.Uid = ses->Suid; - - pSMB->AndXCommand = 0xFF; - rc = SendReceiveNoRsp(xid, ses, (char *) pSMB, 0); -session_already_dead: - mutex_unlock(&ses->session_mutex); - - /* if session dead then we do not need to do ulogoff, - since server closed smb session, no sense reporting - error */ - if (rc == -EAGAIN) - rc = 0; - return rc; -} - -int -CIFSPOSIXDelFile(const int xid, struct cifs_tcon *tcon, const char *fileName, - __u16 type, const struct nls_table *nls_codepage, int remap) -{ - TRANSACTION2_SPI_REQ *pSMB = NULL; - TRANSACTION2_SPI_RSP *pSMBr = NULL; - struct unlink_psx_rq *pRqD; - int name_len; - int rc = 0; - int bytes_returned = 0; - __u16 params, param_offset, offset, byte_count; - - cFYI(1, "In POSIX delete"); -PsxDelete: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB add path length overrun check */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); - } - - params = 6 + name_len; - pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = 0; /* BB double check this with jra */ - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - - /* Setup pointer to Request Data (inode type) */ - pRqD = (struct unlink_psx_rq *)(((char *)&pSMB->hdr.Protocol) + offset); - pRqD->type = cpu_to_le16(type); - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - byte_count = 3 /* pad */ + params + sizeof(struct unlink_psx_rq); - - pSMB->DataCount = cpu_to_le16(sizeof(struct unlink_psx_rq)); - pSMB->TotalDataCount = cpu_to_le16(sizeof(struct unlink_psx_rq)); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_UNLINK); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cFYI(1, "Posix delete returned %d", rc); - cifs_buf_release(pSMB); - - cifs_stats_inc(&tcon->num_deletes); - - if (rc == -EAGAIN) - goto PsxDelete; - - return rc; -} - -int -CIFSSMBDelFile(const int xid, struct cifs_tcon *tcon, const char *fileName, - const struct nls_table *nls_codepage, int remap) -{ - DELETE_FILE_REQ *pSMB = NULL; - DELETE_FILE_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - -DelFileRetry: - rc = smb_init(SMB_COM_DELETE, 1, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->fileName, fileName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->fileName, fileName, name_len); - } - pSMB->SearchAttributes = - cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM); - pSMB->BufferFormat = 0x04; - inc_rfc1001_len(pSMB, name_len + 1); - pSMB->ByteCount = cpu_to_le16(name_len + 1); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_deletes); - if (rc) - cFYI(1, "Error in RMFile = %d", rc); - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto DelFileRetry; - - return rc; -} - -int -CIFSSMBRmDir(const int xid, struct cifs_tcon *tcon, const char *dirName, - const struct nls_table *nls_codepage, int remap) -{ - DELETE_DIRECTORY_REQ *pSMB = NULL; - DELETE_DIRECTORY_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - - cFYI(1, "In CIFSSMBRmDir"); -RmDirRetry: - rc = smb_init(SMB_COM_DELETE_DIRECTORY, 0, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = cifsConvertToUTF16((__le16 *) pSMB->DirName, dirName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve check for buffer overruns BB */ - name_len = strnlen(dirName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->DirName, dirName, name_len); - } - - pSMB->BufferFormat = 0x04; - inc_rfc1001_len(pSMB, name_len + 1); - pSMB->ByteCount = cpu_to_le16(name_len + 1); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_rmdirs); - if (rc) - cFYI(1, "Error in RMDir = %d", rc); - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto RmDirRetry; - return rc; -} - -int -CIFSSMBMkDir(const int xid, struct cifs_tcon *tcon, - const char *name, const struct nls_table *nls_codepage, int remap) -{ - int rc = 0; - CREATE_DIRECTORY_REQ *pSMB = NULL; - CREATE_DIRECTORY_RSP *pSMBr = NULL; - int bytes_returned; - int name_len; - - cFYI(1, "In CIFSSMBMkDir"); -MkDirRetry: - rc = smb_init(SMB_COM_CREATE_DIRECTORY, 0, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = cifsConvertToUTF16((__le16 *) pSMB->DirName, name, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve check for buffer overruns BB */ - name_len = strnlen(name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->DirName, name, name_len); - } - - pSMB->BufferFormat = 0x04; - inc_rfc1001_len(pSMB, name_len + 1); - pSMB->ByteCount = cpu_to_le16(name_len + 1); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_mkdirs); - if (rc) - cFYI(1, "Error in Mkdir = %d", rc); - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto MkDirRetry; - return rc; -} - -int -CIFSPOSIXCreate(const int xid, struct cifs_tcon *tcon, __u32 posix_flags, - __u64 mode, __u16 *netfid, FILE_UNIX_BASIC_INFO *pRetData, - __u32 *pOplock, const char *name, - const struct nls_table *nls_codepage, int remap) -{ - TRANSACTION2_SPI_REQ *pSMB = NULL; - TRANSACTION2_SPI_RSP *pSMBr = NULL; - int name_len; - int rc = 0; - int bytes_returned = 0; - __u16 params, param_offset, offset, byte_count, count; - OPEN_PSX_REQ *pdata; - OPEN_PSX_RSP *psx_rsp; - - cFYI(1, "In POSIX Create"); -PsxCreat: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, name, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, name, name_len); - } - - params = 6 + name_len; - count = sizeof(OPEN_PSX_REQ); - pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = cpu_to_le16(1000); /* large enough */ - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - pdata = (OPEN_PSX_REQ *)(((char *)&pSMB->hdr.Protocol) + offset); - pdata->Level = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC); - pdata->Permissions = cpu_to_le64(mode); - pdata->PosixOpenFlags = cpu_to_le32(posix_flags); - pdata->OpenFlags = cpu_to_le32(*pOplock); - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - byte_count = 3 /* pad */ + params + count; - - pSMB->DataCount = cpu_to_le16(count); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_OPEN); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Posix create returned %d", rc); - goto psx_create_err; - } - - cFYI(1, "copying inode info"); - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < sizeof(OPEN_PSX_RSP)) { - rc = -EIO; /* bad smb */ - goto psx_create_err; - } - - /* copy return information to pRetData */ - psx_rsp = (OPEN_PSX_RSP *)((char *) &pSMBr->hdr.Protocol - + le16_to_cpu(pSMBr->t2.DataOffset)); - - *pOplock = le16_to_cpu(psx_rsp->OplockFlags); - if (netfid) - *netfid = psx_rsp->Fid; /* cifs fid stays in le */ - /* Let caller know file was created so we can set the mode. */ - /* Do we care about the CreateAction in any other cases? */ - if (cpu_to_le32(FILE_CREATE) == psx_rsp->CreateAction) - *pOplock |= CIFS_CREATE_ACTION; - /* check to make sure response data is there */ - if (psx_rsp->ReturnedLevel != cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC)) { - pRetData->Type = cpu_to_le32(-1); /* unknown */ - cFYI(DBG2, "unknown type"); - } else { - if (get_bcc(&pSMBr->hdr) < sizeof(OPEN_PSX_RSP) - + sizeof(FILE_UNIX_BASIC_INFO)) { - cERROR(1, "Open response data too small"); - pRetData->Type = cpu_to_le32(-1); - goto psx_create_err; - } - memcpy((char *) pRetData, - (char *)psx_rsp + sizeof(OPEN_PSX_RSP), - sizeof(FILE_UNIX_BASIC_INFO)); - } - -psx_create_err: - cifs_buf_release(pSMB); - - if (posix_flags & SMB_O_DIRECTORY) - cifs_stats_inc(&tcon->num_posixmkdirs); - else - cifs_stats_inc(&tcon->num_posixopens); - - if (rc == -EAGAIN) - goto PsxCreat; - - return rc; -} - -static __u16 convert_disposition(int disposition) -{ - __u16 ofun = 0; - - switch (disposition) { - case FILE_SUPERSEDE: - ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC; - break; - case FILE_OPEN: - ofun = SMBOPEN_OAPPEND; - break; - case FILE_CREATE: - ofun = SMBOPEN_OCREATE; - break; - case FILE_OPEN_IF: - ofun = SMBOPEN_OCREATE | SMBOPEN_OAPPEND; - break; - case FILE_OVERWRITE: - ofun = SMBOPEN_OTRUNC; - break; - case FILE_OVERWRITE_IF: - ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC; - break; - default: - cFYI(1, "unknown disposition %d", disposition); - ofun = SMBOPEN_OAPPEND; /* regular open */ - } - return ofun; -} - -static int -access_flags_to_smbopen_mode(const int access_flags) -{ - int masked_flags = access_flags & (GENERIC_READ | GENERIC_WRITE); - - if (masked_flags == GENERIC_READ) - return SMBOPEN_READ; - else if (masked_flags == GENERIC_WRITE) - return SMBOPEN_WRITE; - - /* just go for read/write */ - return SMBOPEN_READWRITE; -} - -int -SMBLegacyOpen(const int xid, struct cifs_tcon *tcon, - const char *fileName, const int openDisposition, - const int access_flags, const int create_options, __u16 *netfid, - int *pOplock, FILE_ALL_INFO *pfile_info, - const struct nls_table *nls_codepage, int remap) -{ - int rc = -EACCES; - OPENX_REQ *pSMB = NULL; - OPENX_RSP *pSMBr = NULL; - int bytes_returned; - int name_len; - __u16 count; - -OldOpenRetry: - rc = smb_init(SMB_COM_OPEN_ANDX, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->AndXCommand = 0xFF; /* none */ - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - count = 1; /* account for one byte pad to word boundary */ - name_len = - cifsConvertToUTF16((__le16 *) (pSMB->fileName + 1), - fileName, PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve check for buffer overruns BB */ - count = 0; /* no pad */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->fileName, fileName, name_len); - } - if (*pOplock & REQ_OPLOCK) - pSMB->OpenFlags = cpu_to_le16(REQ_OPLOCK); - else if (*pOplock & REQ_BATCHOPLOCK) - pSMB->OpenFlags = cpu_to_le16(REQ_BATCHOPLOCK); - - pSMB->OpenFlags |= cpu_to_le16(REQ_MORE_INFO); - pSMB->Mode = cpu_to_le16(access_flags_to_smbopen_mode(access_flags)); - pSMB->Mode |= cpu_to_le16(0x40); /* deny none */ - /* set file as system file if special file such - as fifo and server expecting SFU style and - no Unix extensions */ - - if (create_options & CREATE_OPTION_SPECIAL) - pSMB->FileAttributes = cpu_to_le16(ATTR_SYSTEM); - else /* BB FIXME BB */ - pSMB->FileAttributes = cpu_to_le16(0/*ATTR_NORMAL*/); - - if (create_options & CREATE_OPTION_READONLY) - pSMB->FileAttributes |= cpu_to_le16(ATTR_READONLY); - - /* BB FIXME BB */ -/* pSMB->CreateOptions = cpu_to_le32(create_options & - CREATE_OPTIONS_MASK); */ - /* BB FIXME END BB */ - - pSMB->Sattr = cpu_to_le16(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_DIRECTORY); - pSMB->OpenFunction = cpu_to_le16(convert_disposition(openDisposition)); - count += name_len; - inc_rfc1001_len(pSMB, count); - - pSMB->ByteCount = cpu_to_le16(count); - /* long_op set to 1 to allow for oplock break timeouts */ - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *)pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_opens); - if (rc) { - cFYI(1, "Error in Open = %d", rc); - } else { - /* BB verify if wct == 15 */ - -/* *pOplock = pSMBr->OplockLevel; */ /* BB take from action field*/ - - *netfid = pSMBr->Fid; /* cifs fid stays in le */ - /* Let caller know file was created so we can set the mode. */ - /* Do we care about the CreateAction in any other cases? */ - /* BB FIXME BB */ -/* if (cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction) - *pOplock |= CIFS_CREATE_ACTION; */ - /* BB FIXME END */ - - if (pfile_info) { - pfile_info->CreationTime = 0; /* BB convert CreateTime*/ - pfile_info->LastAccessTime = 0; /* BB fixme */ - pfile_info->LastWriteTime = 0; /* BB fixme */ - pfile_info->ChangeTime = 0; /* BB fixme */ - pfile_info->Attributes = - cpu_to_le32(le16_to_cpu(pSMBr->FileAttributes)); - /* the file_info buf is endian converted by caller */ - pfile_info->AllocationSize = - cpu_to_le64(le32_to_cpu(pSMBr->EndOfFile)); - pfile_info->EndOfFile = pfile_info->AllocationSize; - pfile_info->NumberOfLinks = cpu_to_le32(1); - pfile_info->DeletePending = 0; - } - } - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto OldOpenRetry; - return rc; -} - -int -CIFSSMBOpen(const int xid, struct cifs_tcon *tcon, - const char *fileName, const int openDisposition, - const int access_flags, const int create_options, __u16 *netfid, - int *pOplock, FILE_ALL_INFO *pfile_info, - const struct nls_table *nls_codepage, int remap) -{ - int rc = -EACCES; - OPEN_REQ *pSMB = NULL; - OPEN_RSP *pSMBr = NULL; - int bytes_returned; - int name_len; - __u16 count; - -openRetry: - rc = smb_init(SMB_COM_NT_CREATE_ANDX, 24, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->AndXCommand = 0xFF; /* none */ - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - count = 1; /* account for one byte pad to word boundary */ - name_len = - cifsConvertToUTF16((__le16 *) (pSMB->fileName + 1), - fileName, PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - pSMB->NameLength = cpu_to_le16(name_len); - } else { /* BB improve check for buffer overruns BB */ - count = 0; /* no pad */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - pSMB->NameLength = cpu_to_le16(name_len); - strncpy(pSMB->fileName, fileName, name_len); - } - if (*pOplock & REQ_OPLOCK) - pSMB->OpenFlags = cpu_to_le32(REQ_OPLOCK); - else if (*pOplock & REQ_BATCHOPLOCK) - pSMB->OpenFlags = cpu_to_le32(REQ_BATCHOPLOCK); - pSMB->DesiredAccess = cpu_to_le32(access_flags); - pSMB->AllocationSize = 0; - /* set file as system file if special file such - as fifo and server expecting SFU style and - no Unix extensions */ - if (create_options & CREATE_OPTION_SPECIAL) - pSMB->FileAttributes = cpu_to_le32(ATTR_SYSTEM); - else - pSMB->FileAttributes = cpu_to_le32(ATTR_NORMAL); - - /* XP does not handle ATTR_POSIX_SEMANTICS */ - /* but it helps speed up case sensitive checks for other - servers such as Samba */ - if (tcon->ses->capabilities & CAP_UNIX) - pSMB->FileAttributes |= cpu_to_le32(ATTR_POSIX_SEMANTICS); - - if (create_options & CREATE_OPTION_READONLY) - pSMB->FileAttributes |= cpu_to_le32(ATTR_READONLY); - - pSMB->ShareAccess = cpu_to_le32(FILE_SHARE_ALL); - pSMB->CreateDisposition = cpu_to_le32(openDisposition); - pSMB->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK); - /* BB Expirement with various impersonation levels and verify */ - pSMB->ImpersonationLevel = cpu_to_le32(SECURITY_IMPERSONATION); - pSMB->SecurityFlags = - SECURITY_CONTEXT_TRACKING | SECURITY_EFFECTIVE_ONLY; - - count += name_len; - inc_rfc1001_len(pSMB, count); - - pSMB->ByteCount = cpu_to_le16(count); - /* long_op set to 1 to allow for oplock break timeouts */ - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *)pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_opens); - if (rc) { - cFYI(1, "Error in Open = %d", rc); - } else { - *pOplock = pSMBr->OplockLevel; /* 1 byte no need to le_to_cpu */ - *netfid = pSMBr->Fid; /* cifs fid stays in le */ - /* Let caller know file was created so we can set the mode. */ - /* Do we care about the CreateAction in any other cases? */ - if (cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction) - *pOplock |= CIFS_CREATE_ACTION; - if (pfile_info) { - memcpy((char *)pfile_info, (char *)&pSMBr->CreationTime, - 36 /* CreationTime to Attributes */); - /* the file_info buf is endian converted by caller */ - pfile_info->AllocationSize = pSMBr->AllocationSize; - pfile_info->EndOfFile = pSMBr->EndOfFile; - pfile_info->NumberOfLinks = cpu_to_le32(1); - pfile_info->DeletePending = 0; - } - } - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto openRetry; - return rc; -} - -struct cifs_readdata * -cifs_readdata_alloc(unsigned int nr_pages) -{ - struct cifs_readdata *rdata; - - /* readdata + 1 kvec for each page */ - rdata = kzalloc(sizeof(*rdata) + - sizeof(struct kvec) * nr_pages, GFP_KERNEL); - if (rdata != NULL) { - INIT_WORK(&rdata->work, cifs_readv_complete); - INIT_LIST_HEAD(&rdata->pages); - } - return rdata; -} - -void -cifs_readdata_free(struct cifs_readdata *rdata) -{ - cifsFileInfo_put(rdata->cfile); - kfree(rdata); -} - -/* - * Discard any remaining data in the current SMB. To do this, we borrow the - * current bigbuf. - */ -static int -cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) -{ - unsigned int rfclen = get_rfc1002_length(server->smallbuf); - int remaining = rfclen + 4 - server->total_read; - struct cifs_readdata *rdata = mid->callback_data; - - while (remaining > 0) { - int length; - - length = cifs_read_from_socket(server, server->bigbuf, - min_t(unsigned int, remaining, - CIFSMaxBufSize + max_header_size())); - if (length < 0) - return length; - server->total_read += length; - remaining -= length; - } - - dequeue_mid(mid, rdata->result); - return 0; -} - -static inline size_t -read_rsp_size(void) -{ - return sizeof(READ_RSP); -} - -static inline unsigned int -read_data_offset(char *buf) -{ - READ_RSP *rsp = (READ_RSP *)buf; - return le16_to_cpu(rsp->DataOffset); -} - -static inline unsigned int -read_data_length(char *buf) -{ - READ_RSP *rsp = (READ_RSP *)buf; - return (le16_to_cpu(rsp->DataLengthHigh) << 16) + - le16_to_cpu(rsp->DataLength); -} - -static int -cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) -{ - int length, len; - unsigned int data_offset, remaining, data_len; - struct cifs_readdata *rdata = mid->callback_data; - char *buf = server->smallbuf; - unsigned int buflen = get_rfc1002_length(buf) + 4; - u64 eof; - pgoff_t eof_index; - struct page *page, *tpage; - - cFYI(1, "%s: mid=%llu offset=%llu bytes=%u", __func__, - mid->mid, rdata->offset, rdata->bytes); - - /* - * read the rest of READ_RSP header (sans Data array), or whatever we - * can if there's not enough data. At this point, we've read down to - * the Mid. - */ - len = min_t(unsigned int, buflen, read_rsp_size()) - header_size() + 1; - - rdata->iov[0].iov_base = buf + header_size() - 1; - rdata->iov[0].iov_len = len; - - length = cifs_readv_from_socket(server, rdata->iov, 1, len); - if (length < 0) - return length; - server->total_read += length; - - /* Was the SMB read successful? */ - rdata->result = map_smb_to_linux_error(buf, false); - if (rdata->result != 0) { - cFYI(1, "%s: server returned error %d", __func__, - rdata->result); - return cifs_readv_discard(server, mid); - } - - /* Is there enough to get to the rest of the READ_RSP header? */ - if (server->total_read < read_rsp_size()) { - cFYI(1, "%s: server returned short header. got=%u expected=%zu", - __func__, server->total_read, read_rsp_size()); - rdata->result = -EIO; - return cifs_readv_discard(server, mid); - } - - data_offset = read_data_offset(buf) + 4; - if (data_offset < server->total_read) { - /* - * win2k8 sometimes sends an offset of 0 when the read - * is beyond the EOF. Treat it as if the data starts just after - * the header. - */ - cFYI(1, "%s: data offset (%u) inside read response header", - __func__, data_offset); - data_offset = server->total_read; - } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { - /* data_offset is beyond the end of smallbuf */ - cFYI(1, "%s: data offset (%u) beyond end of smallbuf", - __func__, data_offset); - rdata->result = -EIO; - return cifs_readv_discard(server, mid); - } - - cFYI(1, "%s: total_read=%u data_offset=%u", __func__, - server->total_read, data_offset); - - len = data_offset - server->total_read; - if (len > 0) { - /* read any junk before data into the rest of smallbuf */ - rdata->iov[0].iov_base = buf + server->total_read; - rdata->iov[0].iov_len = len; - length = cifs_readv_from_socket(server, rdata->iov, 1, len); - if (length < 0) - return length; - server->total_read += length; - } - - /* set up first iov for signature check */ - rdata->iov[0].iov_base = buf; - rdata->iov[0].iov_len = server->total_read; - cFYI(1, "0: iov_base=%p iov_len=%zu", - rdata->iov[0].iov_base, rdata->iov[0].iov_len); - - /* how much data is in the response? */ - data_len = read_data_length(buf); - if (data_offset + data_len > buflen) { - /* data_len is corrupt -- discard frame */ - rdata->result = -EIO; - return cifs_readv_discard(server, mid); - } - - /* marshal up the page array */ - len = 0; - remaining = data_len; - rdata->nr_iov = 1; - - /* determine the eof that the server (probably) has */ - eof = CIFS_I(rdata->mapping->host)->server_eof; - eof_index = eof ? (eof - 1) >> PAGE_CACHE_SHIFT : 0; - cFYI(1, "eof=%llu eof_index=%lu", eof, eof_index); - - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - if (remaining >= PAGE_CACHE_SIZE) { - /* enough data to fill the page */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = PAGE_CACHE_SIZE; - cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - ++rdata->nr_iov; - len += PAGE_CACHE_SIZE; - remaining -= PAGE_CACHE_SIZE; - } else if (remaining > 0) { - /* enough for partial page, fill and zero the rest */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = remaining; - cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - memset(rdata->iov[rdata->nr_iov].iov_base + remaining, - '\0', PAGE_CACHE_SIZE - remaining); - ++rdata->nr_iov; - len += remaining; - remaining = 0; - } else if (page->index > eof_index) { - /* - * The VFS will not try to do readahead past the - * i_size, but it's possible that we have outstanding - * writes with gaps in the middle and the i_size hasn't - * caught up yet. Populate those with zeroed out pages - * to prevent the VFS from repeatedly attempting to - * fill them until the writes are flushed. - */ - zero_user(page, 0, PAGE_CACHE_SIZE); - list_del(&page->lru); - lru_cache_add_file(page); - flush_dcache_page(page); - SetPageUptodate(page); - unlock_page(page); - page_cache_release(page); - } else { - /* no need to hold page hostage */ - list_del(&page->lru); - lru_cache_add_file(page); - unlock_page(page); - page_cache_release(page); - } - } - - /* issue the read if we have any iovecs left to fill */ - if (rdata->nr_iov > 1) { - length = cifs_readv_from_socket(server, &rdata->iov[1], - rdata->nr_iov - 1, len); - if (length < 0) - return length; - server->total_read += length; - } else { - length = 0; - } - - rdata->bytes = length; - - cFYI(1, "total_read=%u buflen=%u remaining=%u", server->total_read, - buflen, remaining); - - /* discard anything left over */ - if (server->total_read < buflen) - return cifs_readv_discard(server, mid); - - dequeue_mid(mid, false); - return length; -} - -static void -cifs_readv_complete(struct work_struct *work) -{ - struct cifs_readdata *rdata = container_of(work, - struct cifs_readdata, work); - struct page *page, *tpage; - - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - list_del(&page->lru); - lru_cache_add_file(page); - - if (rdata->result == 0) { - kunmap(page); - flush_dcache_page(page); - SetPageUptodate(page); - } - - unlock_page(page); - - if (rdata->result == 0) - cifs_readpage_to_fscache(rdata->mapping->host, page); - - page_cache_release(page); - } - cifs_readdata_free(rdata); -} - -static void -cifs_readv_callback(struct mid_q_entry *mid) -{ - struct cifs_readdata *rdata = mid->callback_data; - struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); - struct TCP_Server_Info *server = tcon->ses->server; - - cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__, - mid->mid, mid->mid_state, rdata->result, rdata->bytes); - - switch (mid->mid_state) { - case MID_RESPONSE_RECEIVED: - /* result already set, check signature */ - if (server->sec_mode & - (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { - if (cifs_verify_signature(rdata->iov, rdata->nr_iov, - server, mid->sequence_number + 1)) - cERROR(1, "Unexpected SMB signature"); - } - /* FIXME: should this be counted toward the initiating task? */ - task_io_account_read(rdata->bytes); - cifs_stats_bytes_read(tcon, rdata->bytes); - break; - case MID_REQUEST_SUBMITTED: - case MID_RETRY_NEEDED: - rdata->result = -EAGAIN; - break; - default: - rdata->result = -EIO; - } - - queue_work(cifsiod_wq, &rdata->work); - DeleteMidQEntry(mid); - cifs_add_credits(server, 1); -} - -/* cifs_async_readv - send an async write, and set up mid to handle result */ -int -cifs_async_readv(struct cifs_readdata *rdata) -{ - int rc; - READ_REQ *smb = NULL; - int wct; - struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); - - cFYI(1, "%s: offset=%llu bytes=%u", __func__, - rdata->offset, rdata->bytes); - - if (tcon->ses->capabilities & CAP_LARGE_FILES) - wct = 12; - else { - wct = 10; /* old style read */ - if ((rdata->offset >> 32) > 0) { - /* can not handle this big offset for old */ - return -EIO; - } - } - - rc = small_smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **)&smb); - if (rc) - return rc; - - smb->hdr.Pid = cpu_to_le16((__u16)rdata->pid); - smb->hdr.PidHigh = cpu_to_le16((__u16)(rdata->pid >> 16)); - - smb->AndXCommand = 0xFF; /* none */ - smb->Fid = rdata->cfile->netfid; - smb->OffsetLow = cpu_to_le32(rdata->offset & 0xFFFFFFFF); - if (wct == 12) - smb->OffsetHigh = cpu_to_le32(rdata->offset >> 32); - smb->Remaining = 0; - smb->MaxCount = cpu_to_le16(rdata->bytes & 0xFFFF); - smb->MaxCountHigh = cpu_to_le32(rdata->bytes >> 16); - if (wct == 12) - smb->ByteCount = 0; - else { - /* old style read */ - struct smb_com_readx_req *smbr = - (struct smb_com_readx_req *)smb; - smbr->ByteCount = 0; - } - - /* 4 for RFC1001 length + 1 for BCC */ - rdata->iov[0].iov_base = smb; - rdata->iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4; - - rc = cifs_call_async(tcon->ses->server, rdata->iov, 1, - cifs_readv_receive, cifs_readv_callback, - rdata, false); - - if (rc == 0) - cifs_stats_inc(&tcon->num_reads); - - cifs_small_buf_release(smb); - return rc; -} - -int -CIFSSMBRead(const int xid, struct cifs_io_parms *io_parms, unsigned int *nbytes, - char **buf, int *pbuf_type) -{ - int rc = -EACCES; - READ_REQ *pSMB = NULL; - READ_RSP *pSMBr = NULL; - char *pReadData = NULL; - int wct; - int resp_buf_type = 0; - struct kvec iov[1]; - __u32 pid = io_parms->pid; - __u16 netfid = io_parms->netfid; - __u64 offset = io_parms->offset; - struct cifs_tcon *tcon = io_parms->tcon; - unsigned int count = io_parms->length; - - cFYI(1, "Reading %d bytes on fid %d", count, netfid); - if (tcon->ses->capabilities & CAP_LARGE_FILES) - wct = 12; - else { - wct = 10; /* old style read */ - if ((offset >> 32) > 0) { - /* can not handle this big offset for old */ - return -EIO; - } - } - - *nbytes = 0; - rc = small_smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **) &pSMB); - if (rc) - return rc; - - pSMB->hdr.Pid = cpu_to_le16((__u16)pid); - pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16)); - - /* tcon and ses pointer are checked in smb_init */ - if (tcon->ses->server == NULL) - return -ECONNABORTED; - - pSMB->AndXCommand = 0xFF; /* none */ - pSMB->Fid = netfid; - pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF); - if (wct == 12) - pSMB->OffsetHigh = cpu_to_le32(offset >> 32); - - pSMB->Remaining = 0; - pSMB->MaxCount = cpu_to_le16(count & 0xFFFF); - pSMB->MaxCountHigh = cpu_to_le32(count >> 16); - if (wct == 12) - pSMB->ByteCount = 0; /* no need to do le conversion since 0 */ - else { - /* old style read */ - struct smb_com_readx_req *pSMBW = - (struct smb_com_readx_req *)pSMB; - pSMBW->ByteCount = 0; - } - - iov[0].iov_base = (char *)pSMB; - iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4; - rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */, - &resp_buf_type, CIFS_LOG_ERROR); - cifs_stats_inc(&tcon->num_reads); - pSMBr = (READ_RSP *)iov[0].iov_base; - if (rc) { - cERROR(1, "Send error in read = %d", rc); - } else { - int data_length = le16_to_cpu(pSMBr->DataLengthHigh); - data_length = data_length << 16; - data_length += le16_to_cpu(pSMBr->DataLength); - *nbytes = data_length; - - /*check that DataLength would not go beyond end of SMB */ - if ((data_length > CIFSMaxBufSize) - || (data_length > count)) { - cFYI(1, "bad length %d for count %d", - data_length, count); - rc = -EIO; - *nbytes = 0; - } else { - pReadData = (char *) (&pSMBr->hdr.Protocol) + - le16_to_cpu(pSMBr->DataOffset); -/* if (rc = copy_to_user(buf, pReadData, data_length)) { - cERROR(1, "Faulting on read rc = %d",rc); - rc = -EFAULT; - }*/ /* can not use copy_to_user when using page cache*/ - if (*buf) - memcpy(*buf, pReadData, data_length); - } - } - -/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */ - if (*buf) { - if (resp_buf_type == CIFS_SMALL_BUFFER) - cifs_small_buf_release(iov[0].iov_base); - else if (resp_buf_type == CIFS_LARGE_BUFFER) - cifs_buf_release(iov[0].iov_base); - } else if (resp_buf_type != CIFS_NO_BUFFER) { - /* return buffer to caller to free */ - *buf = iov[0].iov_base; - if (resp_buf_type == CIFS_SMALL_BUFFER) - *pbuf_type = CIFS_SMALL_BUFFER; - else if (resp_buf_type == CIFS_LARGE_BUFFER) - *pbuf_type = CIFS_LARGE_BUFFER; - } /* else no valid buffer on return - leave as null */ - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - return rc; -} - - -int -CIFSSMBWrite(const int xid, struct cifs_io_parms *io_parms, - unsigned int *nbytes, const char *buf, - const char __user *ubuf, const int long_op) -{ - int rc = -EACCES; - WRITE_REQ *pSMB = NULL; - WRITE_RSP *pSMBr = NULL; - int bytes_returned, wct; - __u32 bytes_sent; - __u16 byte_count; - __u32 pid = io_parms->pid; - __u16 netfid = io_parms->netfid; - __u64 offset = io_parms->offset; - struct cifs_tcon *tcon = io_parms->tcon; - unsigned int count = io_parms->length; - - *nbytes = 0; - - /* cFYI(1, "write at %lld %d bytes", offset, count);*/ - if (tcon->ses == NULL) - return -ECONNABORTED; - - if (tcon->ses->capabilities & CAP_LARGE_FILES) - wct = 14; - else { - wct = 12; - if ((offset >> 32) > 0) { - /* can not handle big offset for old srv */ - return -EIO; - } - } - - rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->hdr.Pid = cpu_to_le16((__u16)pid); - pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16)); - - /* tcon and ses pointer are checked in smb_init */ - if (tcon->ses->server == NULL) - return -ECONNABORTED; - - pSMB->AndXCommand = 0xFF; /* none */ - pSMB->Fid = netfid; - pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF); - if (wct == 14) - pSMB->OffsetHigh = cpu_to_le32(offset >> 32); - - pSMB->Reserved = 0xFFFFFFFF; - pSMB->WriteMode = 0; - pSMB->Remaining = 0; - - /* Can increase buffer size if buffer is big enough in some cases ie we - can send more if LARGE_WRITE_X capability returned by the server and if - our buffer is big enough or if we convert to iovecs on socket writes - and eliminate the copy to the CIFS buffer */ - if (tcon->ses->capabilities & CAP_LARGE_WRITE_X) { - bytes_sent = min_t(const unsigned int, CIFSMaxBufSize, count); - } else { - bytes_sent = (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) - & ~0xFF; - } - - if (bytes_sent > count) - bytes_sent = count; - pSMB->DataOffset = - cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4); - if (buf) - memcpy(pSMB->Data, buf, bytes_sent); - else if (ubuf) { - if (copy_from_user(pSMB->Data, ubuf, bytes_sent)) { - cifs_buf_release(pSMB); - return -EFAULT; - } - } else if (count != 0) { - /* No buffer */ - cifs_buf_release(pSMB); - return -EINVAL; - } /* else setting file size with write of zero bytes */ - if (wct == 14) - byte_count = bytes_sent + 1; /* pad */ - else /* wct == 12 */ - byte_count = bytes_sent + 5; /* bigger pad, smaller smb hdr */ - - pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF); - pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16); - inc_rfc1001_len(pSMB, byte_count); - - if (wct == 14) - pSMB->ByteCount = cpu_to_le16(byte_count); - else { /* old style write has byte count 4 bytes earlier - so 4 bytes pad */ - struct smb_com_writex_req *pSMBW = - (struct smb_com_writex_req *)pSMB; - pSMBW->ByteCount = cpu_to_le16(byte_count); - } - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, long_op); - cifs_stats_inc(&tcon->num_writes); - if (rc) { - cFYI(1, "Send error in write = %d", rc); - } else { - *nbytes = le16_to_cpu(pSMBr->CountHigh); - *nbytes = (*nbytes) << 16; - *nbytes += le16_to_cpu(pSMBr->Count); - - /* - * Mask off high 16 bits when bytes written as returned by the - * server is greater than bytes requested by the client. Some - * OS/2 servers are known to set incorrect CountHigh values. - */ - if (*nbytes > count) - *nbytes &= 0xFFFF; - } - - cifs_buf_release(pSMB); - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - - return rc; -} - -void -cifs_writedata_release(struct kref *refcount) -{ - struct cifs_writedata *wdata = container_of(refcount, - struct cifs_writedata, refcount); - - if (wdata->cfile) - cifsFileInfo_put(wdata->cfile); - - kfree(wdata); -} - -/* - * Write failed with a retryable error. Resend the write request. It's also - * possible that the page was redirtied so re-clean the page. - */ -static void -cifs_writev_requeue(struct cifs_writedata *wdata) -{ - int i, rc; - struct inode *inode = wdata->cfile->dentry->d_inode; - - for (i = 0; i < wdata->nr_pages; i++) { - lock_page(wdata->pages[i]); - clear_page_dirty_for_io(wdata->pages[i]); - } - - do { - rc = cifs_async_writev(wdata); - } while (rc == -EAGAIN); - - for (i = 0; i < wdata->nr_pages; i++) { - if (rc != 0) - SetPageError(wdata->pages[i]); - unlock_page(wdata->pages[i]); - } - - mapping_set_error(inode->i_mapping, rc); - kref_put(&wdata->refcount, cifs_writedata_release); -} - -void -cifs_writev_complete(struct work_struct *work) -{ - struct cifs_writedata *wdata = container_of(work, - struct cifs_writedata, work); - struct inode *inode = wdata->cfile->dentry->d_inode; - int i = 0; - - if (wdata->result == 0) { - spin_lock(&inode->i_lock); - cifs_update_eof(CIFS_I(inode), wdata->offset, wdata->bytes); - spin_unlock(&inode->i_lock); - cifs_stats_bytes_written(tlink_tcon(wdata->cfile->tlink), - wdata->bytes); - } else if (wdata->sync_mode == WB_SYNC_ALL && wdata->result == -EAGAIN) - return cifs_writev_requeue(wdata); - - for (i = 0; i < wdata->nr_pages; i++) { - struct page *page = wdata->pages[i]; - if (wdata->result == -EAGAIN) - __set_page_dirty_nobuffers(page); - else if (wdata->result < 0) - SetPageError(page); - end_page_writeback(page); - page_cache_release(page); - } - if (wdata->result != -EAGAIN) - mapping_set_error(inode->i_mapping, wdata->result); - kref_put(&wdata->refcount, cifs_writedata_release); -} - -struct cifs_writedata * -cifs_writedata_alloc(unsigned int nr_pages, work_func_t complete) -{ - struct cifs_writedata *wdata; - - /* this would overflow */ - if (nr_pages == 0) { - cERROR(1, "%s: called with nr_pages == 0!", __func__); - return NULL; - } - - /* writedata + number of page pointers */ - wdata = kzalloc(sizeof(*wdata) + - sizeof(struct page *) * (nr_pages - 1), GFP_NOFS); - if (wdata != NULL) { - kref_init(&wdata->refcount); - INIT_LIST_HEAD(&wdata->list); - init_completion(&wdata->done); - INIT_WORK(&wdata->work, complete); - } - return wdata; -} - -/* - * Check the mid_state and signature on received buffer (if any), and queue the - * workqueue completion task. - */ -static void -cifs_writev_callback(struct mid_q_entry *mid) -{ - struct cifs_writedata *wdata = mid->callback_data; - struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); - unsigned int written; - WRITE_RSP *smb = (WRITE_RSP *)mid->resp_buf; - - switch (mid->mid_state) { - case MID_RESPONSE_RECEIVED: - wdata->result = cifs_check_receive(mid, tcon->ses->server, 0); - if (wdata->result != 0) - break; - - written = le16_to_cpu(smb->CountHigh); - written <<= 16; - written += le16_to_cpu(smb->Count); - /* - * Mask off high 16 bits when bytes written as returned - * by the server is greater than bytes requested by the - * client. OS/2 servers are known to set incorrect - * CountHigh values. - */ - if (written > wdata->bytes) - written &= 0xFFFF; - - if (written < wdata->bytes) - wdata->result = -ENOSPC; - else - wdata->bytes = written; - break; - case MID_REQUEST_SUBMITTED: - case MID_RETRY_NEEDED: - wdata->result = -EAGAIN; - break; - default: - wdata->result = -EIO; - break; - } - - queue_work(cifsiod_wq, &wdata->work); - DeleteMidQEntry(mid); - cifs_add_credits(tcon->ses->server, 1); -} - -/* cifs_async_writev - send an async write, and set up mid to handle result */ -int -cifs_async_writev(struct cifs_writedata *wdata) -{ - int i, rc = -EACCES; - WRITE_REQ *smb = NULL; - int wct; - struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); - struct kvec *iov = NULL; - - if (tcon->ses->capabilities & CAP_LARGE_FILES) { - wct = 14; - } else { - wct = 12; - if (wdata->offset >> 32 > 0) { - /* can not handle big offset for old srv */ - return -EIO; - } - } - - rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **)&smb); - if (rc) - goto async_writev_out; - - /* 1 iov per page + 1 for header */ - iov = kzalloc((wdata->nr_pages + 1) * sizeof(*iov), GFP_NOFS); - if (iov == NULL) { - rc = -ENOMEM; - goto async_writev_out; - } - - smb->hdr.Pid = cpu_to_le16((__u16)wdata->pid); - smb->hdr.PidHigh = cpu_to_le16((__u16)(wdata->pid >> 16)); - - smb->AndXCommand = 0xFF; /* none */ - smb->Fid = wdata->cfile->netfid; - smb->OffsetLow = cpu_to_le32(wdata->offset & 0xFFFFFFFF); - if (wct == 14) - smb->OffsetHigh = cpu_to_le32(wdata->offset >> 32); - smb->Reserved = 0xFFFFFFFF; - smb->WriteMode = 0; - smb->Remaining = 0; - - smb->DataOffset = - cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4); - - /* 4 for RFC1001 length + 1 for BCC */ - iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4 + 1; - iov[0].iov_base = smb; - - /* - * This function should marshal up the page array into the kvec - * array, reserving [0] for the header. It should kmap the pages - * and set the iov_len properly for each one. It may also set - * wdata->bytes too. - */ - wdata->marshal_iov(iov, wdata); - - cFYI(1, "async write at %llu %u bytes", wdata->offset, wdata->bytes); - - smb->DataLengthLow = cpu_to_le16(wdata->bytes & 0xFFFF); - smb->DataLengthHigh = cpu_to_le16(wdata->bytes >> 16); - - if (wct == 14) { - inc_rfc1001_len(&smb->hdr, wdata->bytes + 1); - put_bcc(wdata->bytes + 1, &smb->hdr); - } else { - /* wct == 12 */ - struct smb_com_writex_req *smbw = - (struct smb_com_writex_req *)smb; - inc_rfc1001_len(&smbw->hdr, wdata->bytes + 5); - put_bcc(wdata->bytes + 5, &smbw->hdr); - iov[0].iov_len += 4; /* pad bigger by four bytes */ - } - - kref_get(&wdata->refcount); - rc = cifs_call_async(tcon->ses->server, iov, wdata->nr_pages + 1, - NULL, cifs_writev_callback, wdata, false); - - if (rc == 0) - cifs_stats_inc(&tcon->num_writes); - else - kref_put(&wdata->refcount, cifs_writedata_release); - - /* send is done, unmap pages */ - for (i = 0; i < wdata->nr_pages; i++) - kunmap(wdata->pages[i]); - -async_writev_out: - cifs_small_buf_release(smb); - kfree(iov); - return rc; -} - -int -CIFSSMBWrite2(const int xid, struct cifs_io_parms *io_parms, - unsigned int *nbytes, struct kvec *iov, int n_vec, - const int long_op) -{ - int rc = -EACCES; - WRITE_REQ *pSMB = NULL; - int wct; - int smb_hdr_len; - int resp_buf_type = 0; - __u32 pid = io_parms->pid; - __u16 netfid = io_parms->netfid; - __u64 offset = io_parms->offset; - struct cifs_tcon *tcon = io_parms->tcon; - unsigned int count = io_parms->length; - - *nbytes = 0; - - cFYI(1, "write2 at %lld %d bytes", (long long)offset, count); - - if (tcon->ses->capabilities & CAP_LARGE_FILES) { - wct = 14; - } else { - wct = 12; - if ((offset >> 32) > 0) { - /* can not handle big offset for old srv */ - return -EIO; - } - } - rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB); - if (rc) - return rc; - - pSMB->hdr.Pid = cpu_to_le16((__u16)pid); - pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16)); - - /* tcon and ses pointer are checked in smb_init */ - if (tcon->ses->server == NULL) - return -ECONNABORTED; - - pSMB->AndXCommand = 0xFF; /* none */ - pSMB->Fid = netfid; - pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF); - if (wct == 14) - pSMB->OffsetHigh = cpu_to_le32(offset >> 32); - pSMB->Reserved = 0xFFFFFFFF; - pSMB->WriteMode = 0; - pSMB->Remaining = 0; - - pSMB->DataOffset = - cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4); - - pSMB->DataLengthLow = cpu_to_le16(count & 0xFFFF); - pSMB->DataLengthHigh = cpu_to_le16(count >> 16); - /* header + 1 byte pad */ - smb_hdr_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 1; - if (wct == 14) - inc_rfc1001_len(pSMB, count + 1); - else /* wct == 12 */ - inc_rfc1001_len(pSMB, count + 5); /* smb data starts later */ - if (wct == 14) - pSMB->ByteCount = cpu_to_le16(count + 1); - else /* wct == 12 */ /* bigger pad, smaller smb hdr, keep offset ok */ { - struct smb_com_writex_req *pSMBW = - (struct smb_com_writex_req *)pSMB; - pSMBW->ByteCount = cpu_to_le16(count + 5); - } - iov[0].iov_base = pSMB; - if (wct == 14) - iov[0].iov_len = smb_hdr_len + 4; - else /* wct == 12 pad bigger by four bytes */ - iov[0].iov_len = smb_hdr_len + 8; - - - rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type, - long_op); - cifs_stats_inc(&tcon->num_writes); - if (rc) { - cFYI(1, "Send error Write2 = %d", rc); - } else if (resp_buf_type == 0) { - /* presumably this can not happen, but best to be safe */ - rc = -EIO; - } else { - WRITE_RSP *pSMBr = (WRITE_RSP *)iov[0].iov_base; - *nbytes = le16_to_cpu(pSMBr->CountHigh); - *nbytes = (*nbytes) << 16; - *nbytes += le16_to_cpu(pSMBr->Count); - - /* - * Mask off high 16 bits when bytes written as returned by the - * server is greater than bytes requested by the client. OS/2 - * servers are known to set incorrect CountHigh values. - */ - if (*nbytes > count) - *nbytes &= 0xFFFF; - } - -/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */ - if (resp_buf_type == CIFS_SMALL_BUFFER) - cifs_small_buf_release(iov[0].iov_base); - else if (resp_buf_type == CIFS_LARGE_BUFFER) - cifs_buf_release(iov[0].iov_base); - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - - return rc; -} - -int cifs_lockv(const int xid, struct cifs_tcon *tcon, const __u16 netfid, - const __u8 lock_type, const __u32 num_unlock, - const __u32 num_lock, LOCKING_ANDX_RANGE *buf) -{ - int rc = 0; - LOCK_REQ *pSMB = NULL; - struct kvec iov[2]; - int resp_buf_type; - __u16 count; - - cFYI(1, "cifs_lockv num lock %d num unlock %d", num_lock, num_unlock); - - rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB); - if (rc) - return rc; - - pSMB->Timeout = 0; - pSMB->NumberOfLocks = cpu_to_le16(num_lock); - pSMB->NumberOfUnlocks = cpu_to_le16(num_unlock); - pSMB->LockType = lock_type; - pSMB->AndXCommand = 0xFF; /* none */ - pSMB->Fid = netfid; /* netfid stays le */ - - count = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE); - inc_rfc1001_len(pSMB, count); - pSMB->ByteCount = cpu_to_le16(count); - - iov[0].iov_base = (char *)pSMB; - iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4 - - (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE); - iov[1].iov_base = (char *)buf; - iov[1].iov_len = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE); - - cifs_stats_inc(&tcon->num_locks); - rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); - if (rc) - cFYI(1, "Send error in cifs_lockv = %d", rc); - - return rc; -} - -int -CIFSSMBLock(const int xid, struct cifs_tcon *tcon, - const __u16 smb_file_id, const __u32 netpid, const __u64 len, - const __u64 offset, const __u32 numUnlock, - const __u32 numLock, const __u8 lockType, - const bool waitFlag, const __u8 oplock_level) -{ - int rc = 0; - LOCK_REQ *pSMB = NULL; -/* LOCK_RSP *pSMBr = NULL; */ /* No response data other than rc to parse */ - int bytes_returned; - int timeout = 0; - __u16 count; - - cFYI(1, "CIFSSMBLock timeout %d numLock %d", (int)waitFlag, numLock); - rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB); - - if (rc) - return rc; - - if (lockType == LOCKING_ANDX_OPLOCK_RELEASE) { - timeout = CIFS_ASYNC_OP; /* no response expected */ - pSMB->Timeout = 0; - } else if (waitFlag) { - timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */ - pSMB->Timeout = cpu_to_le32(-1);/* blocking - do not time out */ - } else { - pSMB->Timeout = 0; - } - - pSMB->NumberOfLocks = cpu_to_le16(numLock); - pSMB->NumberOfUnlocks = cpu_to_le16(numUnlock); - pSMB->LockType = lockType; - pSMB->OplockLevel = oplock_level; - pSMB->AndXCommand = 0xFF; /* none */ - pSMB->Fid = smb_file_id; /* netfid stays le */ - - if ((numLock != 0) || (numUnlock != 0)) { - pSMB->Locks[0].Pid = cpu_to_le16(netpid); - /* BB where to store pid high? */ - pSMB->Locks[0].LengthLow = cpu_to_le32((u32)len); - pSMB->Locks[0].LengthHigh = cpu_to_le32((u32)(len>>32)); - pSMB->Locks[0].OffsetLow = cpu_to_le32((u32)offset); - pSMB->Locks[0].OffsetHigh = cpu_to_le32((u32)(offset>>32)); - count = sizeof(LOCKING_ANDX_RANGE); - } else { - /* oplock break */ - count = 0; - } - inc_rfc1001_len(pSMB, count); - pSMB->ByteCount = cpu_to_le16(count); - - if (waitFlag) { - rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMB, &bytes_returned); - cifs_small_buf_release(pSMB); - } else { - rc = SendReceiveNoRsp(xid, tcon->ses, (char *)pSMB, timeout); - /* SMB buffer freed by function above */ - } - cifs_stats_inc(&tcon->num_locks); - if (rc) - cFYI(1, "Send error in Lock = %d", rc); - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - return rc; -} - -int -CIFSSMBPosixLock(const int xid, struct cifs_tcon *tcon, - const __u16 smb_file_id, const __u32 netpid, const int get_flag, - const __u64 len, struct file_lock *pLockData, - const __u16 lock_type, const bool waitFlag) -{ - struct smb_com_transaction2_sfi_req *pSMB = NULL; - struct smb_com_transaction2_sfi_rsp *pSMBr = NULL; - struct cifs_posix_lock *parm_data; - int rc = 0; - int timeout = 0; - int bytes_returned = 0; - int resp_buf_type = 0; - __u16 params, param_offset, offset, byte_count, count; - struct kvec iov[1]; - - cFYI(1, "Posix Lock"); - - if (pLockData == NULL) - return -EINVAL; - - rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB); - - if (rc) - return rc; - - pSMBr = (struct smb_com_transaction2_sfi_rsp *)pSMB; - - params = 6; - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4; - offset = param_offset + params; - - count = sizeof(struct cifs_posix_lock); - pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */ - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - if (get_flag) - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION); - else - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION); - byte_count = 3 /* pad */ + params + count; - pSMB->DataCount = cpu_to_le16(count); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - parm_data = (struct cifs_posix_lock *) - (((char *) &pSMB->hdr.Protocol) + offset); - - parm_data->lock_type = cpu_to_le16(lock_type); - if (waitFlag) { - timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */ - parm_data->lock_flags = cpu_to_le16(1); - pSMB->Timeout = cpu_to_le32(-1); - } else - pSMB->Timeout = 0; - - parm_data->pid = cpu_to_le32(netpid); - parm_data->start = cpu_to_le64(pLockData->fl_start); - parm_data->length = cpu_to_le64(len); /* normalize negative numbers */ - - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->Fid = smb_file_id; - pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_LOCK); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - if (waitFlag) { - rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned); - } else { - iov[0].iov_base = (char *)pSMB; - iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4; - rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */, - &resp_buf_type, timeout); - pSMB = NULL; /* request buf already freed by SendReceive2. Do - not try to free it twice below on exit */ - pSMBr = (struct smb_com_transaction2_sfi_rsp *)iov[0].iov_base; - } - - if (rc) { - cFYI(1, "Send error in Posix Lock = %d", rc); - } else if (get_flag) { - /* lock structure can be returned on get */ - __u16 data_offset; - __u16 data_count; - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < sizeof(*parm_data)) { - rc = -EIO; /* bad smb */ - goto plk_err_exit; - } - data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - data_count = le16_to_cpu(pSMBr->t2.DataCount); - if (data_count < sizeof(struct cifs_posix_lock)) { - rc = -EIO; - goto plk_err_exit; - } - parm_data = (struct cifs_posix_lock *) - ((char *)&pSMBr->hdr.Protocol + data_offset); - if (parm_data->lock_type == __constant_cpu_to_le16(CIFS_UNLCK)) - pLockData->fl_type = F_UNLCK; - else { - if (parm_data->lock_type == - __constant_cpu_to_le16(CIFS_RDLCK)) - pLockData->fl_type = F_RDLCK; - else if (parm_data->lock_type == - __constant_cpu_to_le16(CIFS_WRLCK)) - pLockData->fl_type = F_WRLCK; - - pLockData->fl_start = le64_to_cpu(parm_data->start); - pLockData->fl_end = pLockData->fl_start + - le64_to_cpu(parm_data->length) - 1; - pLockData->fl_pid = le32_to_cpu(parm_data->pid); - } - } - -plk_err_exit: - if (pSMB) - cifs_small_buf_release(pSMB); - - if (resp_buf_type == CIFS_SMALL_BUFFER) - cifs_small_buf_release(iov[0].iov_base); - else if (resp_buf_type == CIFS_LARGE_BUFFER) - cifs_buf_release(iov[0].iov_base); - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - - return rc; -} - - -int -CIFSSMBClose(const int xid, struct cifs_tcon *tcon, int smb_file_id) -{ - int rc = 0; - CLOSE_REQ *pSMB = NULL; - cFYI(1, "In CIFSSMBClose"); - -/* do not retry on dead session on close */ - rc = small_smb_init(SMB_COM_CLOSE, 3, tcon, (void **) &pSMB); - if (rc == -EAGAIN) - return 0; - if (rc) - return rc; - - pSMB->FileID = (__u16) smb_file_id; - pSMB->LastWriteTime = 0xFFFFFFFF; - pSMB->ByteCount = 0; - rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); - cifs_stats_inc(&tcon->num_closes); - if (rc) { - if (rc != -EINTR) { - /* EINTR is expected when user ctl-c to kill app */ - cERROR(1, "Send error in Close = %d", rc); - } - } - - /* Since session is dead, file will be closed on server already */ - if (rc == -EAGAIN) - rc = 0; - - return rc; -} - -int -CIFSSMBFlush(const int xid, struct cifs_tcon *tcon, int smb_file_id) -{ - int rc = 0; - FLUSH_REQ *pSMB = NULL; - cFYI(1, "In CIFSSMBFlush"); - - rc = small_smb_init(SMB_COM_FLUSH, 1, tcon, (void **) &pSMB); - if (rc) - return rc; - - pSMB->FileID = (__u16) smb_file_id; - pSMB->ByteCount = 0; - rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); - cifs_stats_inc(&tcon->num_flushes); - if (rc) - cERROR(1, "Send error in Flush = %d", rc); - - return rc; -} - -int -CIFSSMBRename(const int xid, struct cifs_tcon *tcon, - const char *fromName, const char *toName, - const struct nls_table *nls_codepage, int remap) -{ - int rc = 0; - RENAME_REQ *pSMB = NULL; - RENAME_RSP *pSMBr = NULL; - int bytes_returned; - int name_len, name_len2; - __u16 count; - - cFYI(1, "In CIFSSMBRename"); -renameRetry: - rc = smb_init(SMB_COM_RENAME, 1, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->BufferFormat = 0x04; - pSMB->SearchAttributes = - cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM | - ATTR_DIRECTORY); - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->OldFileName, fromName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - pSMB->OldFileName[name_len] = 0x04; /* pad */ - /* protocol requires ASCII signature byte on Unicode string */ - pSMB->OldFileName[name_len + 1] = 0x00; - name_len2 = - cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2], - toName, PATH_MAX, nls_codepage, remap); - name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ; - name_len2 *= 2; /* convert to bytes */ - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fromName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->OldFileName, fromName, name_len); - name_len2 = strnlen(toName, PATH_MAX); - name_len2++; /* trailing null */ - pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */ - strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2); - name_len2++; /* trailing null */ - name_len2++; /* signature byte */ - } - - count = 1 /* 1st signature byte */ + name_len + name_len2; - inc_rfc1001_len(pSMB, count); - pSMB->ByteCount = cpu_to_le16(count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_renames); - if (rc) - cFYI(1, "Send error in rename = %d", rc); - - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto renameRetry; - - return rc; -} - -int CIFSSMBRenameOpenFile(const int xid, struct cifs_tcon *pTcon, - int netfid, const char *target_name, - const struct nls_table *nls_codepage, int remap) -{ - struct smb_com_transaction2_sfi_req *pSMB = NULL; - struct smb_com_transaction2_sfi_rsp *pSMBr = NULL; - struct set_file_rename *rename_info; - char *data_offset; - char dummy_string[30]; - int rc = 0; - int bytes_returned = 0; - int len_of_str; - __u16 params, param_offset, offset, count, byte_count; - - cFYI(1, "Rename to File by handle"); - rc = smb_init(SMB_COM_TRANSACTION2, 15, pTcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 6; - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4; - offset = param_offset + params; - - data_offset = (char *) (&pSMB->hdr.Protocol) + offset; - rename_info = (struct set_file_rename *) data_offset; - pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */ - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION); - byte_count = 3 /* pad */ + params; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - /* construct random name ".cifs_tmp<inodenum><mid>" */ - rename_info->overwrite = cpu_to_le32(1); - rename_info->root_fid = 0; - /* unicode only call */ - if (target_name == NULL) { - sprintf(dummy_string, "cifs%x", pSMB->hdr.Mid); - len_of_str = - cifsConvertToUTF16((__le16 *)rename_info->target_name, - dummy_string, 24, nls_codepage, remap); - } else { - len_of_str = - cifsConvertToUTF16((__le16 *)rename_info->target_name, - target_name, PATH_MAX, nls_codepage, - remap); - } - rename_info->target_name_len = cpu_to_le32(2 * len_of_str); - count = 12 /* sizeof(struct set_file_rename) */ + (2 * len_of_str); - byte_count += count; - pSMB->DataCount = cpu_to_le16(count); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->Fid = netfid; - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_RENAME_INFORMATION); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, pTcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&pTcon->num_t2renames); - if (rc) - cFYI(1, "Send error in Rename (by file handle) = %d", rc); - - cifs_buf_release(pSMB); - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - - return rc; -} - -int -CIFSSMBCopy(const int xid, struct cifs_tcon *tcon, const char *fromName, - const __u16 target_tid, const char *toName, const int flags, - const struct nls_table *nls_codepage, int remap) -{ - int rc = 0; - COPY_REQ *pSMB = NULL; - COPY_RSP *pSMBr = NULL; - int bytes_returned; - int name_len, name_len2; - __u16 count; - - cFYI(1, "In CIFSSMBCopy"); -copyRetry: - rc = smb_init(SMB_COM_COPY, 1, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->BufferFormat = 0x04; - pSMB->Tid2 = target_tid; - - pSMB->Flags = cpu_to_le16(flags & COPY_TREE); - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = cifsConvertToUTF16((__le16 *) pSMB->OldFileName, - fromName, PATH_MAX, nls_codepage, - remap); - name_len++; /* trailing null */ - name_len *= 2; - pSMB->OldFileName[name_len] = 0x04; /* pad */ - /* protocol requires ASCII signature byte on Unicode string */ - pSMB->OldFileName[name_len + 1] = 0x00; - name_len2 = - cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2], - toName, PATH_MAX, nls_codepage, remap); - name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ; - name_len2 *= 2; /* convert to bytes */ - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fromName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->OldFileName, fromName, name_len); - name_len2 = strnlen(toName, PATH_MAX); - name_len2++; /* trailing null */ - pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */ - strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2); - name_len2++; /* trailing null */ - name_len2++; /* signature byte */ - } - - count = 1 /* 1st signature byte */ + name_len + name_len2; - inc_rfc1001_len(pSMB, count); - pSMB->ByteCount = cpu_to_le16(count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in copy = %d with %d files copied", - rc, le16_to_cpu(pSMBr->CopyCount)); - } - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto copyRetry; - - return rc; -} - -int -CIFSUnixCreateSymLink(const int xid, struct cifs_tcon *tcon, - const char *fromName, const char *toName, - const struct nls_table *nls_codepage) -{ - TRANSACTION2_SPI_REQ *pSMB = NULL; - TRANSACTION2_SPI_RSP *pSMBr = NULL; - char *data_offset; - int name_len; - int name_len_target; - int rc = 0; - int bytes_returned = 0; - __u16 params, param_offset, offset, byte_count; - - cFYI(1, "In Symlink Unix style"); -createSymLinkRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifs_strtoUTF16((__le16 *) pSMB->FileName, fromName, - /* find define for this maxpathcomponent */ - PATH_MAX, nls_codepage); - name_len++; /* trailing null */ - name_len *= 2; - - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fromName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fromName, name_len); - } - params = 6 + name_len; - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - - data_offset = (char *) (&pSMB->hdr.Protocol) + offset; - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len_target = - cifs_strtoUTF16((__le16 *) data_offset, toName, PATH_MAX - /* find define for this maxpathcomponent */ - , nls_codepage); - name_len_target++; /* trailing null */ - name_len_target *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len_target = strnlen(toName, PATH_MAX); - name_len_target++; /* trailing null */ - strncpy(data_offset, toName, name_len_target); - } - - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max on data count below from sess */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - byte_count = 3 /* pad */ + params + name_len_target; - pSMB->DataCount = cpu_to_le16(name_len_target); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_LINK); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_symlinks); - if (rc) - cFYI(1, "Send error in SetPathInfo create symlink = %d", rc); - - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto createSymLinkRetry; - - return rc; -} - -int -CIFSUnixCreateHardLink(const int xid, struct cifs_tcon *tcon, - const char *fromName, const char *toName, - const struct nls_table *nls_codepage, int remap) -{ - TRANSACTION2_SPI_REQ *pSMB = NULL; - TRANSACTION2_SPI_RSP *pSMBr = NULL; - char *data_offset; - int name_len; - int name_len_target; - int rc = 0; - int bytes_returned = 0; - __u16 params, param_offset, offset, byte_count; - - cFYI(1, "In Create Hard link Unix style"); -createHardLinkRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = cifsConvertToUTF16((__le16 *) pSMB->FileName, toName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(toName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, toName, name_len); - } - params = 6 + name_len; - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - - data_offset = (char *) (&pSMB->hdr.Protocol) + offset; - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len_target = - cifsConvertToUTF16((__le16 *) data_offset, fromName, - PATH_MAX, nls_codepage, remap); - name_len_target++; /* trailing null */ - name_len_target *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len_target = strnlen(fromName, PATH_MAX); - name_len_target++; /* trailing null */ - strncpy(data_offset, fromName, name_len_target); - } - - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max on data count below from sess*/ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - byte_count = 3 /* pad */ + params + name_len_target; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->DataCount = cpu_to_le16(name_len_target); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_HLINK); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_hardlinks); - if (rc) - cFYI(1, "Send error in SetPathInfo (hard link) = %d", rc); - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto createHardLinkRetry; - - return rc; -} - -int -CIFSCreateHardLink(const int xid, struct cifs_tcon *tcon, - const char *fromName, const char *toName, - const struct nls_table *nls_codepage, int remap) -{ - int rc = 0; - NT_RENAME_REQ *pSMB = NULL; - RENAME_RSP *pSMBr = NULL; - int bytes_returned; - int name_len, name_len2; - __u16 count; - - cFYI(1, "In CIFSCreateHardLink"); -winCreateHardLinkRetry: - - rc = smb_init(SMB_COM_NT_RENAME, 4, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->SearchAttributes = - cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM | - ATTR_DIRECTORY); - pSMB->Flags = cpu_to_le16(CREATE_HARD_LINK); - pSMB->ClusterCount = 0; - - pSMB->BufferFormat = 0x04; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->OldFileName, fromName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - - /* protocol specifies ASCII buffer format (0x04) for unicode */ - pSMB->OldFileName[name_len] = 0x04; - pSMB->OldFileName[name_len + 1] = 0x00; /* pad */ - name_len2 = - cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2], - toName, PATH_MAX, nls_codepage, remap); - name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ; - name_len2 *= 2; /* convert to bytes */ - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fromName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->OldFileName, fromName, name_len); - name_len2 = strnlen(toName, PATH_MAX); - name_len2++; /* trailing null */ - pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */ - strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2); - name_len2++; /* trailing null */ - name_len2++; /* signature byte */ - } - - count = 1 /* string type byte */ + name_len + name_len2; - inc_rfc1001_len(pSMB, count); - pSMB->ByteCount = cpu_to_le16(count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_hardlinks); - if (rc) - cFYI(1, "Send error in hard link (NT rename) = %d", rc); - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto winCreateHardLinkRetry; - - return rc; -} - -int -CIFSSMBUnixQuerySymLink(const int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, char **symlinkinfo, - const struct nls_table *nls_codepage) -{ -/* SMB_QUERY_FILE_UNIX_LINK */ - TRANSACTION2_QPI_REQ *pSMB = NULL; - TRANSACTION2_QPI_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - __u16 params, byte_count; - char *data_start; - - cFYI(1, "In QPathSymLinkInfo (Unix) for path %s", searchName); - -querySymLinkRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifs_strtoUTF16((__le16 *) pSMB->FileName, searchName, - PATH_MAX, nls_codepage); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); - } - - params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qpi_req, InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_LINK); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QuerySymLinkInfo = %d", rc); - } else { - /* decode response */ - - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - /* BB also check enough total bytes returned */ - if (rc || get_bcc(&pSMBr->hdr) < 2) - rc = -EIO; - else { - bool is_unicode; - u16 count = le16_to_cpu(pSMBr->t2.DataCount); - - data_start = ((char *) &pSMBr->hdr.Protocol) + - le16_to_cpu(pSMBr->t2.DataOffset); - - if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) - is_unicode = true; - else - is_unicode = false; - - /* BB FIXME investigate remapping reserved chars here */ - *symlinkinfo = cifs_strndup_from_utf16(data_start, - count, is_unicode, nls_codepage); - if (!*symlinkinfo) - rc = -ENOMEM; - } - } - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto querySymLinkRetry; - return rc; -} - -#ifdef CONFIG_CIFS_SYMLINK_EXPERIMENTAL -/* - * Recent Windows versions now create symlinks more frequently - * and they use the "reparse point" mechanism below. We can of course - * do symlinks nicely to Samba and other servers which support the - * CIFS Unix Extensions and we can also do SFU symlinks and "client only" - * "MF" symlinks optionally, but for recent Windows we really need to - * reenable the code below and fix the cifs_symlink callers to handle this. - * In the interim this code has been moved to its own config option so - * it is not compiled in by default until callers fixed up and more tested. - */ -int -CIFSSMBQueryReparseLinkInfo(const int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, - char *symlinkinfo, const int buflen, __u16 fid, - const struct nls_table *nls_codepage) -{ - int rc = 0; - int bytes_returned; - struct smb_com_transaction_ioctl_req *pSMB; - struct smb_com_transaction_ioctl_rsp *pSMBr; - - cFYI(1, "In Windows reparse style QueryLink for path %s", searchName); - rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->TotalParameterCount = 0 ; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le32(2); - /* BB find exact data count max from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00); - pSMB->MaxSetupCount = 4; - pSMB->Reserved = 0; - pSMB->ParameterOffset = 0; - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 4; - pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->FunctionCode = cpu_to_le32(FSCTL_GET_REPARSE_POINT); - pSMB->IsFsctl = 1; /* FSCTL */ - pSMB->IsRootFlag = 0; - pSMB->Fid = fid; /* file handle always le */ - pSMB->ByteCount = 0; - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QueryReparseLinkInfo = %d", rc); - } else { /* decode response */ - __u32 data_offset = le32_to_cpu(pSMBr->DataOffset); - __u32 data_count = le32_to_cpu(pSMBr->DataCount); - if (get_bcc(&pSMBr->hdr) < 2 || data_offset > 512) { - /* BB also check enough total bytes returned */ - rc = -EIO; /* bad smb */ - goto qreparse_out; - } - if (data_count && (data_count < 2048)) { - char *end_of_smb = 2 /* sizeof byte count */ + - get_bcc(&pSMBr->hdr) + (char *)&pSMBr->ByteCount; - - struct reparse_data *reparse_buf = - (struct reparse_data *) - ((char *)&pSMBr->hdr.Protocol - + data_offset); - if ((char *)reparse_buf >= end_of_smb) { - rc = -EIO; - goto qreparse_out; - } - if ((reparse_buf->LinkNamesBuf + - reparse_buf->TargetNameOffset + - reparse_buf->TargetNameLen) > end_of_smb) { - cFYI(1, "reparse buf beyond SMB"); - rc = -EIO; - goto qreparse_out; - } - - if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) { - cifs_from_ucs2(symlinkinfo, (__le16 *) - (reparse_buf->LinkNamesBuf + - reparse_buf->TargetNameOffset), - buflen, - reparse_buf->TargetNameLen, - nls_codepage, 0); - } else { /* ASCII names */ - strncpy(symlinkinfo, - reparse_buf->LinkNamesBuf + - reparse_buf->TargetNameOffset, - min_t(const int, buflen, - reparse_buf->TargetNameLen)); - } - } else { - rc = -EIO; - cFYI(1, "Invalid return data count on " - "get reparse info ioctl"); - } - symlinkinfo[buflen] = 0; /* just in case so the caller - does not go off the end of the buffer */ - cFYI(1, "readlink result - %s", symlinkinfo); - } - -qreparse_out: - cifs_buf_release(pSMB); - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - - return rc; -} -#endif /* CIFS_SYMLINK_EXPERIMENTAL */ /* BB temporarily unused */ - -#ifdef CONFIG_CIFS_POSIX - -/*Convert an Access Control Entry from wire format to local POSIX xattr format*/ -static void cifs_convert_ace(posix_acl_xattr_entry *ace, - struct cifs_posix_ace *cifs_ace) -{ - /* u8 cifs fields do not need le conversion */ - ace->e_perm = cpu_to_le16(cifs_ace->cifs_e_perm); - ace->e_tag = cpu_to_le16(cifs_ace->cifs_e_tag); - ace->e_id = cpu_to_le32(le64_to_cpu(cifs_ace->cifs_uid)); - /* cFYI(1, "perm %d tag %d id %d",ace->e_perm,ace->e_tag,ace->e_id); */ - - return; -} - -/* Convert ACL from CIFS POSIX wire format to local Linux POSIX ACL xattr */ -static int cifs_copy_posix_acl(char *trgt, char *src, const int buflen, - const int acl_type, const int size_of_data_area) -{ - int size = 0; - int i; - __u16 count; - struct cifs_posix_ace *pACE; - struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)src; - posix_acl_xattr_header *local_acl = (posix_acl_xattr_header *)trgt; - - if (le16_to_cpu(cifs_acl->version) != CIFS_ACL_VERSION) - return -EOPNOTSUPP; - - if (acl_type & ACL_TYPE_ACCESS) { - count = le16_to_cpu(cifs_acl->access_entry_count); - pACE = &cifs_acl->ace_array[0]; - size = sizeof(struct cifs_posix_acl); - size += sizeof(struct cifs_posix_ace) * count; - /* check if we would go beyond end of SMB */ - if (size_of_data_area < size) { - cFYI(1, "bad CIFS POSIX ACL size %d vs. %d", - size_of_data_area, size); - return -EINVAL; - } - } else if (acl_type & ACL_TYPE_DEFAULT) { - count = le16_to_cpu(cifs_acl->access_entry_count); - size = sizeof(struct cifs_posix_acl); - size += sizeof(struct cifs_posix_ace) * count; -/* skip past access ACEs to get to default ACEs */ - pACE = &cifs_acl->ace_array[count]; - count = le16_to_cpu(cifs_acl->default_entry_count); - size += sizeof(struct cifs_posix_ace) * count; - /* check if we would go beyond end of SMB */ - if (size_of_data_area < size) - return -EINVAL; - } else { - /* illegal type */ - return -EINVAL; - } - - size = posix_acl_xattr_size(count); - if ((buflen == 0) || (local_acl == NULL)) { - /* used to query ACL EA size */ - } else if (size > buflen) { - return -ERANGE; - } else /* buffer big enough */ { - local_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION); - for (i = 0; i < count ; i++) { - cifs_convert_ace(&local_acl->a_entries[i], pACE); - pACE++; - } - } - return size; -} - -static __u16 convert_ace_to_cifs_ace(struct cifs_posix_ace *cifs_ace, - const posix_acl_xattr_entry *local_ace) -{ - __u16 rc = 0; /* 0 = ACL converted ok */ - - cifs_ace->cifs_e_perm = le16_to_cpu(local_ace->e_perm); - cifs_ace->cifs_e_tag = le16_to_cpu(local_ace->e_tag); - /* BB is there a better way to handle the large uid? */ - if (local_ace->e_id == cpu_to_le32(-1)) { - /* Probably no need to le convert -1 on any arch but can not hurt */ - cifs_ace->cifs_uid = cpu_to_le64(-1); - } else - cifs_ace->cifs_uid = cpu_to_le64(le32_to_cpu(local_ace->e_id)); - /*cFYI(1, "perm %d tag %d id %d",ace->e_perm,ace->e_tag,ace->e_id);*/ - return rc; -} - -/* Convert ACL from local Linux POSIX xattr to CIFS POSIX ACL wire format */ -static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL, - const int buflen, const int acl_type) -{ - __u16 rc = 0; - struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)parm_data; - posix_acl_xattr_header *local_acl = (posix_acl_xattr_header *)pACL; - int count; - int i; - - if ((buflen == 0) || (pACL == NULL) || (cifs_acl == NULL)) - return 0; - - count = posix_acl_xattr_count((size_t)buflen); - cFYI(1, "setting acl with %d entries from buf of length %d and " - "version of %d", - count, buflen, le32_to_cpu(local_acl->a_version)); - if (le32_to_cpu(local_acl->a_version) != 2) { - cFYI(1, "unknown POSIX ACL version %d", - le32_to_cpu(local_acl->a_version)); - return 0; - } - cifs_acl->version = cpu_to_le16(1); - if (acl_type == ACL_TYPE_ACCESS) - cifs_acl->access_entry_count = cpu_to_le16(count); - else if (acl_type == ACL_TYPE_DEFAULT) - cifs_acl->default_entry_count = cpu_to_le16(count); - else { - cFYI(1, "unknown ACL type %d", acl_type); - return 0; - } - for (i = 0; i < count; i++) { - rc = convert_ace_to_cifs_ace(&cifs_acl->ace_array[i], - &local_acl->a_entries[i]); - if (rc != 0) { - /* ACE not converted */ - break; - } - } - if (rc == 0) { - rc = (__u16)(count * sizeof(struct cifs_posix_ace)); - rc += sizeof(struct cifs_posix_acl); - /* BB add check to make sure ACL does not overflow SMB */ - } - return rc; -} - -int -CIFSSMBGetPosixACL(const int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, - char *acl_inf, const int buflen, const int acl_type, - const struct nls_table *nls_codepage, int remap) -{ -/* SMB_QUERY_POSIX_ACL */ - TRANSACTION2_QPI_REQ *pSMB = NULL; - TRANSACTION2_QPI_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - __u16 params, byte_count; - - cFYI(1, "In GetPosixACL (Unix) for path %s", searchName); - -queryAclRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, - searchName, PATH_MAX, nls_codepage, - remap); - name_len++; /* trailing null */ - name_len *= 2; - pSMB->FileName[name_len] = 0; - pSMB->FileName[name_len+1] = 0; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); - } - - params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max data count below from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(4000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16( - offsetof(struct smb_com_transaction2_qpi_req, - InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_ACL); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_acl_get); - if (rc) { - cFYI(1, "Send error in Query POSIX ACL = %d", rc); - } else { - /* decode response */ - - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - /* BB also check enough total bytes returned */ - if (rc || get_bcc(&pSMBr->hdr) < 2) - rc = -EIO; /* bad smb */ - else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - __u16 count = le16_to_cpu(pSMBr->t2.DataCount); - rc = cifs_copy_posix_acl(acl_inf, - (char *)&pSMBr->hdr.Protocol+data_offset, - buflen, acl_type, count); - } - } - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto queryAclRetry; - return rc; -} - -int -CIFSSMBSetPosixACL(const int xid, struct cifs_tcon *tcon, - const unsigned char *fileName, - const char *local_acl, const int buflen, - const int acl_type, - const struct nls_table *nls_codepage, int remap) -{ - struct smb_com_transaction2_spi_req *pSMB = NULL; - struct smb_com_transaction2_spi_rsp *pSMBr = NULL; - char *parm_data; - int name_len; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count, data_count, param_offset, offset; - - cFYI(1, "In SetPosixACL (Unix) for path %s", fileName); -setAclRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); - } - params = 6 + name_len; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find max SMB size from sess */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - parm_data = ((char *) &pSMB->hdr.Protocol) + offset; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - - /* convert to on the wire format for POSIX ACL */ - data_count = ACL_to_cifs_posix(parm_data, local_acl, buflen, acl_type); - - if (data_count == 0) { - rc = -EOPNOTSUPP; - goto setACLerrorExit; - } - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_ACL); - byte_count = 3 /* pad */ + params + data_count; - pSMB->DataCount = cpu_to_le16(data_count); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cFYI(1, "Set POSIX ACL returned %d", rc); - -setACLerrorExit: - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto setAclRetry; - return rc; -} - -/* BB fix tabs in this function FIXME BB */ -int -CIFSGetExtAttr(const int xid, struct cifs_tcon *tcon, - const int netfid, __u64 *pExtAttrBits, __u64 *pMask) -{ - int rc = 0; - struct smb_t2_qfi_req *pSMB = NULL; - struct smb_t2_qfi_rsp *pSMBr = NULL; - int bytes_returned; - __u16 params, byte_count; - - cFYI(1, "In GetExtAttr"); - if (tcon == NULL) - return -ENODEV; - -GetExtAttrRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 2 /* level */ + 2 /* fid */; - pSMB->t2.TotalDataCount = 0; - pSMB->t2.MaxParameterCount = cpu_to_le16(4); - /* BB find exact max data count below from sess structure BB */ - pSMB->t2.MaxDataCount = cpu_to_le16(4000); - pSMB->t2.MaxSetupCount = 0; - pSMB->t2.Reserved = 0; - pSMB->t2.Flags = 0; - pSMB->t2.Timeout = 0; - pSMB->t2.Reserved2 = 0; - pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req, - Fid) - 4); - pSMB->t2.DataCount = 0; - pSMB->t2.DataOffset = 0; - pSMB->t2.SetupCount = 1; - pSMB->t2.Reserved3 = 0; - pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->t2.TotalParameterCount = cpu_to_le16(params); - pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_ATTR_FLAGS); - pSMB->Pad = 0; - pSMB->Fid = netfid; - inc_rfc1001_len(pSMB, byte_count); - pSMB->t2.ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "error %d in GetExtAttr", rc); - } else { - /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - /* BB also check enough total bytes returned */ - if (rc || get_bcc(&pSMBr->hdr) < 2) - /* If rc should we check for EOPNOSUPP and - disable the srvino flag? or in caller? */ - rc = -EIO; /* bad smb */ - else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - __u16 count = le16_to_cpu(pSMBr->t2.DataCount); - struct file_chattr_info *pfinfo; - /* BB Do we need a cast or hash here ? */ - if (count != 16) { - cFYI(1, "Illegal size ret in GetExtAttr"); - rc = -EIO; - goto GetExtAttrOut; - } - pfinfo = (struct file_chattr_info *) - (data_offset + (char *) &pSMBr->hdr.Protocol); - *pExtAttrBits = le64_to_cpu(pfinfo->mode); - *pMask = le64_to_cpu(pfinfo->mask); - } - } -GetExtAttrOut: - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto GetExtAttrRetry; - return rc; -} - -#endif /* CONFIG_POSIX */ - -#ifdef CONFIG_CIFS_ACL -/* - * Initialize NT TRANSACT SMB into small smb request buffer. This assumes that - * all NT TRANSACTS that we init here have total parm and data under about 400 - * bytes (to fit in small cifs buffer size), which is the case so far, it - * easily fits. NB: Setup words themselves and ByteCount MaxSetupCount (size of - * returned setup area) and MaxParameterCount (returned parms size) must be set - * by caller - */ -static int -smb_init_nttransact(const __u16 sub_command, const int setup_count, - const int parm_len, struct cifs_tcon *tcon, - void **ret_buf) -{ - int rc; - __u32 temp_offset; - struct smb_com_ntransact_req *pSMB; - - rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon, - (void **)&pSMB); - if (rc) - return rc; - *ret_buf = (void *)pSMB; - pSMB->Reserved = 0; - pSMB->TotalParameterCount = cpu_to_le32(parm_len); - pSMB->TotalDataCount = 0; - pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->DataCount = pSMB->TotalDataCount; - temp_offset = offsetof(struct smb_com_ntransact_req, Parms) + - (setup_count * 2) - 4 /* for rfc1001 length itself */; - pSMB->ParameterOffset = cpu_to_le32(temp_offset); - pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len); - pSMB->SetupCount = setup_count; /* no need to le convert byte fields */ - pSMB->SubCommand = cpu_to_le16(sub_command); - return 0; -} - -static int -validate_ntransact(char *buf, char **ppparm, char **ppdata, - __u32 *pparmlen, __u32 *pdatalen) -{ - char *end_of_smb; - __u32 data_count, data_offset, parm_count, parm_offset; - struct smb_com_ntransact_rsp *pSMBr; - u16 bcc; - - *pdatalen = 0; - *pparmlen = 0; - - if (buf == NULL) - return -EINVAL; - - pSMBr = (struct smb_com_ntransact_rsp *)buf; - - bcc = get_bcc(&pSMBr->hdr); - end_of_smb = 2 /* sizeof byte count */ + bcc + - (char *)&pSMBr->ByteCount; - - data_offset = le32_to_cpu(pSMBr->DataOffset); - data_count = le32_to_cpu(pSMBr->DataCount); - parm_offset = le32_to_cpu(pSMBr->ParameterOffset); - parm_count = le32_to_cpu(pSMBr->ParameterCount); - - *ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset; - *ppdata = (char *)&pSMBr->hdr.Protocol + data_offset; - - /* should we also check that parm and data areas do not overlap? */ - if (*ppparm > end_of_smb) { - cFYI(1, "parms start after end of smb"); - return -EINVAL; - } else if (parm_count + *ppparm > end_of_smb) { - cFYI(1, "parm end after end of smb"); - return -EINVAL; - } else if (*ppdata > end_of_smb) { - cFYI(1, "data starts after end of smb"); - return -EINVAL; - } else if (data_count + *ppdata > end_of_smb) { - cFYI(1, "data %p + count %d (%p) past smb end %p start %p", - *ppdata, data_count, (data_count + *ppdata), - end_of_smb, pSMBr); - return -EINVAL; - } else if (parm_count + data_count > bcc) { - cFYI(1, "parm count and data count larger than SMB"); - return -EINVAL; - } - *pdatalen = data_count; - *pparmlen = parm_count; - return 0; -} - -/* Get Security Descriptor (by handle) from remote server for a file or dir */ -int -CIFSSMBGetCIFSACL(const int xid, struct cifs_tcon *tcon, __u16 fid, - struct cifs_ntsd **acl_inf, __u32 *pbuflen) -{ - int rc = 0; - int buf_type = 0; - QUERY_SEC_DESC_REQ *pSMB; - struct kvec iov[1]; - - cFYI(1, "GetCifsACL"); - - *pbuflen = 0; - *acl_inf = NULL; - - rc = smb_init_nttransact(NT_TRANSACT_QUERY_SECURITY_DESC, 0, - 8 /* parm len */, tcon, (void **) &pSMB); - if (rc) - return rc; - - pSMB->MaxParameterCount = cpu_to_le32(4); - /* BB TEST with big acls that might need to be e.g. larger than 16K */ - pSMB->MaxSetupCount = 0; - pSMB->Fid = fid; /* file handle always le */ - pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP | - CIFS_ACL_DACL); - pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */ - inc_rfc1001_len(pSMB, 11); - iov[0].iov_base = (char *)pSMB; - iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4; - - rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type, - 0); - cifs_stats_inc(&tcon->num_acl_get); - if (rc) { - cFYI(1, "Send error in QuerySecDesc = %d", rc); - } else { /* decode response */ - __le32 *parm; - __u32 parm_len; - __u32 acl_len; - struct smb_com_ntransact_rsp *pSMBr; - char *pdata; - -/* validate_nttransact */ - rc = validate_ntransact(iov[0].iov_base, (char **)&parm, - &pdata, &parm_len, pbuflen); - if (rc) - goto qsec_out; - pSMBr = (struct smb_com_ntransact_rsp *)iov[0].iov_base; - - cFYI(1, "smb %p parm %p data %p", pSMBr, parm, *acl_inf); - - if (le32_to_cpu(pSMBr->ParameterCount) != 4) { - rc = -EIO; /* bad smb */ - *pbuflen = 0; - goto qsec_out; - } - -/* BB check that data area is minimum length and as big as acl_len */ - - acl_len = le32_to_cpu(*parm); - if (acl_len != *pbuflen) { - cERROR(1, "acl length %d does not match %d", - acl_len, *pbuflen); - if (*pbuflen > acl_len) - *pbuflen = acl_len; - } - - /* check if buffer is big enough for the acl - header followed by the smallest SID */ - if ((*pbuflen < sizeof(struct cifs_ntsd) + 8) || - (*pbuflen >= 64 * 1024)) { - cERROR(1, "bad acl length %d", *pbuflen); - rc = -EINVAL; - *pbuflen = 0; - } else { - *acl_inf = kmalloc(*pbuflen, GFP_KERNEL); - if (*acl_inf == NULL) { - *pbuflen = 0; - rc = -ENOMEM; - } - memcpy(*acl_inf, pdata, *pbuflen); - } - } -qsec_out: - if (buf_type == CIFS_SMALL_BUFFER) - cifs_small_buf_release(iov[0].iov_base); - else if (buf_type == CIFS_LARGE_BUFFER) - cifs_buf_release(iov[0].iov_base); -/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */ - return rc; -} - -int -CIFSSMBSetCIFSACL(const int xid, struct cifs_tcon *tcon, __u16 fid, - struct cifs_ntsd *pntsd, __u32 acllen, int aclflag) -{ - __u16 byte_count, param_count, data_count, param_offset, data_offset; - int rc = 0; - int bytes_returned = 0; - SET_SEC_DESC_REQ *pSMB = NULL; - void *pSMBr; - -setCifsAclRetry: - rc = smb_init(SMB_COM_NT_TRANSACT, 19, tcon, (void **) &pSMB, &pSMBr); - if (rc) - return rc; - - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - - param_count = 8; - param_offset = offsetof(struct smb_com_transaction_ssec_req, Fid) - 4; - data_count = acllen; - data_offset = param_offset + param_count; - byte_count = 3 /* pad */ + param_count; - - pSMB->DataCount = cpu_to_le32(data_count); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->MaxParameterCount = cpu_to_le32(4); - pSMB->MaxDataCount = cpu_to_le32(16384); - pSMB->ParameterCount = cpu_to_le32(param_count); - pSMB->ParameterOffset = cpu_to_le32(param_offset); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->DataOffset = cpu_to_le32(data_offset); - pSMB->SetupCount = 0; - pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_SET_SECURITY_DESC); - pSMB->ByteCount = cpu_to_le16(byte_count+data_count); - - pSMB->Fid = fid; /* file handle always le */ - pSMB->Reserved2 = 0; - pSMB->AclFlags = cpu_to_le32(aclflag); - - if (pntsd && acllen) { - memcpy((char *)pSMBr + offsetof(struct smb_hdr, Protocol) + - data_offset, pntsd, acllen); - inc_rfc1001_len(pSMB, byte_count + data_count); - } else - inc_rfc1001_len(pSMB, byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - - cFYI(1, "SetCIFSACL bytes_returned: %d, rc: %d", bytes_returned, rc); - if (rc) - cFYI(1, "Set CIFS ACL returned %d", rc); - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto setCifsAclRetry; - - return (rc); -} - -#endif /* CONFIG_CIFS_ACL */ - -/* Legacy Query Path Information call for lookup to old servers such - as Win9x/WinME */ -int SMBQueryInformation(const int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, - FILE_ALL_INFO *pFinfo, - const struct nls_table *nls_codepage, int remap) -{ - QUERY_INFORMATION_REQ *pSMB; - QUERY_INFORMATION_RSP *pSMBr; - int rc = 0; - int bytes_returned; - int name_len; - - cFYI(1, "In SMBQPath path %s", searchName); -QInfRetry: - rc = smb_init(SMB_COM_QUERY_INFORMATION, 0, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, - searchName, PATH_MAX, nls_codepage, - remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); - } - pSMB->BufferFormat = 0x04; - name_len++; /* account for buffer type byte */ - inc_rfc1001_len(pSMB, (__u16)name_len); - pSMB->ByteCount = cpu_to_le16(name_len); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QueryInfo = %d", rc); - } else if (pFinfo) { - struct timespec ts; - __u32 time = le32_to_cpu(pSMBr->last_write_time); - - /* decode response */ - /* BB FIXME - add time zone adjustment BB */ - memset(pFinfo, 0, sizeof(FILE_ALL_INFO)); - ts.tv_nsec = 0; - ts.tv_sec = time; - /* decode time fields */ - pFinfo->ChangeTime = cpu_to_le64(cifs_UnixTimeToNT(ts)); - pFinfo->LastWriteTime = pFinfo->ChangeTime; - pFinfo->LastAccessTime = 0; - pFinfo->AllocationSize = - cpu_to_le64(le32_to_cpu(pSMBr->size)); - pFinfo->EndOfFile = pFinfo->AllocationSize; - pFinfo->Attributes = - cpu_to_le32(le16_to_cpu(pSMBr->attr)); - } else - rc = -EIO; /* bad buffer passed in */ - - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto QInfRetry; - - return rc; -} - -int -CIFSSMBQFileInfo(const int xid, struct cifs_tcon *tcon, - u16 netfid, FILE_ALL_INFO *pFindData) -{ - struct smb_t2_qfi_req *pSMB = NULL; - struct smb_t2_qfi_rsp *pSMBr = NULL; - int rc = 0; - int bytes_returned; - __u16 params, byte_count; - -QFileInfoRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 2 /* level */ + 2 /* fid */; - pSMB->t2.TotalDataCount = 0; - pSMB->t2.MaxParameterCount = cpu_to_le16(4); - /* BB find exact max data count below from sess structure BB */ - pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize); - pSMB->t2.MaxSetupCount = 0; - pSMB->t2.Reserved = 0; - pSMB->t2.Flags = 0; - pSMB->t2.Timeout = 0; - pSMB->t2.Reserved2 = 0; - pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req, - Fid) - 4); - pSMB->t2.DataCount = 0; - pSMB->t2.DataOffset = 0; - pSMB->t2.SetupCount = 1; - pSMB->t2.Reserved3 = 0; - pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->t2.TotalParameterCount = cpu_to_le16(params); - pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO); - pSMB->Pad = 0; - pSMB->Fid = netfid; - inc_rfc1001_len(pSMB, byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QPathInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc) /* BB add auto retry on EOPNOTSUPP? */ - rc = -EIO; - else if (get_bcc(&pSMBr->hdr) < 40) - rc = -EIO; /* bad smb */ - else if (pFindData) { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - memcpy((char *) pFindData, - (char *) &pSMBr->hdr.Protocol + - data_offset, sizeof(FILE_ALL_INFO)); - } else - rc = -ENOMEM; - } - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto QFileInfoRetry; - - return rc; -} - -int -CIFSSMBQPathInfo(const int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, - FILE_ALL_INFO *pFindData, - int legacy /* old style infolevel */, - const struct nls_table *nls_codepage, int remap) -{ -/* level 263 SMB_QUERY_FILE_ALL_INFO */ - TRANSACTION2_QPI_REQ *pSMB = NULL; - TRANSACTION2_QPI_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - __u16 params, byte_count; - -/* cFYI(1, "In QPathInfo path %s", searchName); */ -QPathInfoRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); - } - - params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(4000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qpi_req, InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - if (legacy) - pSMB->InformationLevel = cpu_to_le16(SMB_INFO_STANDARD); - else - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QPathInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc) /* BB add auto retry on EOPNOTSUPP? */ - rc = -EIO; - else if (!legacy && get_bcc(&pSMBr->hdr) < 40) - rc = -EIO; /* bad smb */ - else if (legacy && get_bcc(&pSMBr->hdr) < 24) - rc = -EIO; /* 24 or 26 expected but we do not read - last field */ - else if (pFindData) { - int size; - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - - /* On legacy responses we do not read the last field, - EAsize, fortunately since it varies by subdialect and - also note it differs on Set vs. Get, ie two bytes or 4 - bytes depending but we don't care here */ - if (legacy) - size = sizeof(FILE_INFO_STANDARD); - else - size = sizeof(FILE_ALL_INFO); - memcpy((char *) pFindData, - (char *) &pSMBr->hdr.Protocol + - data_offset, size); - } else - rc = -ENOMEM; - } - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto QPathInfoRetry; - - return rc; -} - -int -CIFSSMBUnixQFileInfo(const int xid, struct cifs_tcon *tcon, - u16 netfid, FILE_UNIX_BASIC_INFO *pFindData) -{ - struct smb_t2_qfi_req *pSMB = NULL; - struct smb_t2_qfi_rsp *pSMBr = NULL; - int rc = 0; - int bytes_returned; - __u16 params, byte_count; - -UnixQFileInfoRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 2 /* level */ + 2 /* fid */; - pSMB->t2.TotalDataCount = 0; - pSMB->t2.MaxParameterCount = cpu_to_le16(4); - /* BB find exact max data count below from sess structure BB */ - pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize); - pSMB->t2.MaxSetupCount = 0; - pSMB->t2.Reserved = 0; - pSMB->t2.Flags = 0; - pSMB->t2.Timeout = 0; - pSMB->t2.Reserved2 = 0; - pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req, - Fid) - 4); - pSMB->t2.DataCount = 0; - pSMB->t2.DataOffset = 0; - pSMB->t2.SetupCount = 1; - pSMB->t2.Reserved3 = 0; - pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->t2.TotalParameterCount = cpu_to_le16(params); - pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC); - pSMB->Pad = 0; - pSMB->Fid = netfid; - inc_rfc1001_len(pSMB, byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QPathInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < sizeof(FILE_UNIX_BASIC_INFO)) { - cERROR(1, "Malformed FILE_UNIX_BASIC_INFO response.\n" - "Unix Extensions can be disabled on mount " - "by specifying the nosfu mount option."); - rc = -EIO; /* bad smb */ - } else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - memcpy((char *) pFindData, - (char *) &pSMBr->hdr.Protocol + - data_offset, - sizeof(FILE_UNIX_BASIC_INFO)); - } - } - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto UnixQFileInfoRetry; - - return rc; -} - -int -CIFSSMBUnixQPathInfo(const int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, - FILE_UNIX_BASIC_INFO *pFindData, - const struct nls_table *nls_codepage, int remap) -{ -/* SMB_QUERY_FILE_UNIX_BASIC */ - TRANSACTION2_QPI_REQ *pSMB = NULL; - TRANSACTION2_QPI_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned = 0; - int name_len; - __u16 params, byte_count; - - cFYI(1, "In QPathInfo (Unix) the path %s", searchName); -UnixQPathInfoRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); - } - - params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(4000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qpi_req, InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QPathInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < sizeof(FILE_UNIX_BASIC_INFO)) { - cERROR(1, "Malformed FILE_UNIX_BASIC_INFO response.\n" - "Unix Extensions can be disabled on mount " - "by specifying the nosfu mount option."); - rc = -EIO; /* bad smb */ - } else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - memcpy((char *) pFindData, - (char *) &pSMBr->hdr.Protocol + - data_offset, - sizeof(FILE_UNIX_BASIC_INFO)); - } - } - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto UnixQPathInfoRetry; - - return rc; -} - -/* xid, tcon, searchName and codepage are input parms, rest are returned */ -int -CIFSFindFirst(const int xid, struct cifs_tcon *tcon, - const char *searchName, - const struct nls_table *nls_codepage, - __u16 *pnetfid, __u16 search_flags, - struct cifs_search_info *psrch_inf, int remap, const char dirsep) -{ -/* level 257 SMB_ */ - TRANSACTION2_FFIRST_REQ *pSMB = NULL; - TRANSACTION2_FFIRST_RSP *pSMBr = NULL; - T2_FFIRST_RSP_PARMS *parms; - int rc = 0; - int bytes_returned = 0; - int name_len; - __u16 params, byte_count; - - cFYI(1, "In FindFirst for %s", searchName); - -findFirstRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName, - PATH_MAX, nls_codepage, remap); - /* We can not add the asterik earlier in case - it got remapped to 0xF03A as if it were part of the - directory name instead of a wildcard */ - name_len *= 2; - pSMB->FileName[name_len] = dirsep; - pSMB->FileName[name_len+1] = 0; - pSMB->FileName[name_len+2] = '*'; - pSMB->FileName[name_len+3] = 0; - name_len += 4; /* now the trailing null */ - pSMB->FileName[name_len] = 0; /* null terminate just in case */ - pSMB->FileName[name_len+1] = 0; - name_len += 2; - } else { /* BB add check for overrun of SMB buf BB */ - name_len = strnlen(searchName, PATH_MAX); -/* BB fix here and in unicode clause above ie - if (name_len > buffersize-header) - free buffer exit; BB */ - strncpy(pSMB->FileName, searchName, name_len); - pSMB->FileName[name_len] = dirsep; - pSMB->FileName[name_len+1] = '*'; - pSMB->FileName[name_len+2] = 0; - name_len += 3; - } - - params = 12 + name_len /* includes null */ ; - pSMB->TotalDataCount = 0; /* no EAs */ - pSMB->MaxParameterCount = cpu_to_le16(10); - pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize & 0xFFFFFF00); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->ParameterOffset = cpu_to_le16( - offsetof(struct smb_com_transaction2_ffirst_req, SearchAttributes) - - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; /* one byte, no need to make endian neutral */ - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_FIRST); - pSMB->SearchAttributes = - cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM | - ATTR_DIRECTORY); - pSMB->SearchCount = cpu_to_le16(CIFSMaxBufSize/sizeof(FILE_UNIX_INFO)); - pSMB->SearchFlags = cpu_to_le16(search_flags); - pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level); - - /* BB what should we set StorageType to? Does it matter? BB */ - pSMB->SearchStorageType = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_ffirst); - - if (rc) {/* BB add logic to retry regular search if Unix search - rejected unexpectedly by server */ - /* BB Add code to handle unsupported level rc */ - cFYI(1, "Error in FindFirst = %d", rc); - - cifs_buf_release(pSMB); - - /* BB eventually could optimize out free and realloc of buf */ - /* for this case */ - if (rc == -EAGAIN) - goto findFirstRetry; - } else { /* decode response */ - /* BB remember to free buffer if error BB */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - if (rc == 0) { - unsigned int lnoff; - - if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) - psrch_inf->unicode = true; - else - psrch_inf->unicode = false; - - psrch_inf->ntwrk_buf_start = (char *)pSMBr; - psrch_inf->smallBuf = 0; - psrch_inf->srch_entries_start = - (char *) &pSMBr->hdr.Protocol + - le16_to_cpu(pSMBr->t2.DataOffset); - parms = (T2_FFIRST_RSP_PARMS *)((char *) &pSMBr->hdr.Protocol + - le16_to_cpu(pSMBr->t2.ParameterOffset)); - - if (parms->EndofSearch) - psrch_inf->endOfSearch = true; - else - psrch_inf->endOfSearch = false; - - psrch_inf->entries_in_buffer = - le16_to_cpu(parms->SearchCount); - psrch_inf->index_of_last_entry = 2 /* skip . and .. */ + - psrch_inf->entries_in_buffer; - lnoff = le16_to_cpu(parms->LastNameOffset); - if (CIFSMaxBufSize < lnoff) { - cERROR(1, "ignoring corrupt resume name"); - psrch_inf->last_entry = NULL; - return rc; - } - - psrch_inf->last_entry = psrch_inf->srch_entries_start + - lnoff; - - *pnetfid = parms->SearchHandle; - } else { - cifs_buf_release(pSMB); - } - } - - return rc; -} - -int CIFSFindNext(const int xid, struct cifs_tcon *tcon, __u16 searchHandle, - __u16 search_flags, struct cifs_search_info *psrch_inf) -{ - TRANSACTION2_FNEXT_REQ *pSMB = NULL; - TRANSACTION2_FNEXT_RSP *pSMBr = NULL; - T2_FNEXT_RSP_PARMS *parms; - char *response_data; - int rc = 0; - int bytes_returned; - unsigned int name_len; - __u16 params, byte_count; - - cFYI(1, "In FindNext"); - - if (psrch_inf->endOfSearch) - return -ENOENT; - - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 14; /* includes 2 bytes of null string, converted to LE below*/ - byte_count = 0; - pSMB->TotalDataCount = 0; /* no EAs */ - pSMB->MaxParameterCount = cpu_to_le16(8); - pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize & 0xFFFFFF00); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16( - offsetof(struct smb_com_transaction2_fnext_req,SearchHandle) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_NEXT); - pSMB->SearchHandle = searchHandle; /* always kept as le */ - pSMB->SearchCount = - cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO)); - pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level); - pSMB->ResumeKey = psrch_inf->resume_key; - pSMB->SearchFlags = cpu_to_le16(search_flags); - - name_len = psrch_inf->resume_name_len; - params += name_len; - if (name_len < PATH_MAX) { - memcpy(pSMB->ResumeFileName, psrch_inf->presume_name, name_len); - byte_count += name_len; - /* 14 byte parm len above enough for 2 byte null terminator */ - pSMB->ResumeFileName[name_len] = 0; - pSMB->ResumeFileName[name_len+1] = 0; - } else { - rc = -EINVAL; - goto FNext2_err_exit; - } - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - cifs_stats_inc(&tcon->num_fnext); - if (rc) { - if (rc == -EBADF) { - psrch_inf->endOfSearch = true; - cifs_buf_release(pSMB); - rc = 0; /* search probably was closed at end of search*/ - } else - cFYI(1, "FindNext returned = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc == 0) { - unsigned int lnoff; - - /* BB fixme add lock for file (srch_info) struct here */ - if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) - psrch_inf->unicode = true; - else - psrch_inf->unicode = false; - response_data = (char *) &pSMBr->hdr.Protocol + - le16_to_cpu(pSMBr->t2.ParameterOffset); - parms = (T2_FNEXT_RSP_PARMS *)response_data; - response_data = (char *)&pSMBr->hdr.Protocol + - le16_to_cpu(pSMBr->t2.DataOffset); - if (psrch_inf->smallBuf) - cifs_small_buf_release( - psrch_inf->ntwrk_buf_start); - else - cifs_buf_release(psrch_inf->ntwrk_buf_start); - psrch_inf->srch_entries_start = response_data; - psrch_inf->ntwrk_buf_start = (char *)pSMB; - psrch_inf->smallBuf = 0; - if (parms->EndofSearch) - psrch_inf->endOfSearch = true; - else - psrch_inf->endOfSearch = false; - psrch_inf->entries_in_buffer = - le16_to_cpu(parms->SearchCount); - psrch_inf->index_of_last_entry += - psrch_inf->entries_in_buffer; - lnoff = le16_to_cpu(parms->LastNameOffset); - if (CIFSMaxBufSize < lnoff) { - cERROR(1, "ignoring corrupt resume name"); - psrch_inf->last_entry = NULL; - return rc; - } else - psrch_inf->last_entry = - psrch_inf->srch_entries_start + lnoff; - -/* cFYI(1, "fnxt2 entries in buf %d index_of_last %d", - psrch_inf->entries_in_buffer, psrch_inf->index_of_last_entry); */ - - /* BB fixme add unlock here */ - } - - } - - /* BB On error, should we leave previous search buf (and count and - last entry fields) intact or free the previous one? */ - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ -FNext2_err_exit: - if (rc != 0) - cifs_buf_release(pSMB); - return rc; -} - -int -CIFSFindClose(const int xid, struct cifs_tcon *tcon, - const __u16 searchHandle) -{ - int rc = 0; - FINDCLOSE_REQ *pSMB = NULL; - - cFYI(1, "In CIFSSMBFindClose"); - rc = small_smb_init(SMB_COM_FIND_CLOSE2, 1, tcon, (void **)&pSMB); - - /* no sense returning error if session restarted - as file handle has been closed */ - if (rc == -EAGAIN) - return 0; - if (rc) - return rc; - - pSMB->FileID = searchHandle; - pSMB->ByteCount = 0; - rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); - if (rc) - cERROR(1, "Send error in FindClose = %d", rc); - - cifs_stats_inc(&tcon->num_fclose); - - /* Since session is dead, search handle closed on server already */ - if (rc == -EAGAIN) - rc = 0; - - return rc; -} - -int -CIFSGetSrvInodeNumber(const int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, - __u64 *inode_number, - const struct nls_table *nls_codepage, int remap) -{ - int rc = 0; - TRANSACTION2_QPI_REQ *pSMB = NULL; - TRANSACTION2_QPI_RSP *pSMBr = NULL; - int name_len, bytes_returned; - __u16 params, byte_count; - - cFYI(1, "In GetSrvInodeNum for %s", searchName); - if (tcon == NULL) - return -ENODEV; - -GetInodeNumberRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, - searchName, PATH_MAX, nls_codepage, - remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); - } - - params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max data count below from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(4000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qpi_req, InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_INTERNAL_INFO); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "error %d in QueryInternalInfo", rc); - } else { - /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - /* BB also check enough total bytes returned */ - if (rc || get_bcc(&pSMBr->hdr) < 2) - /* If rc should we check for EOPNOSUPP and - disable the srvino flag? or in caller? */ - rc = -EIO; /* bad smb */ - else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - __u16 count = le16_to_cpu(pSMBr->t2.DataCount); - struct file_internal_info *pfinfo; - /* BB Do we need a cast or hash here ? */ - if (count < 8) { - cFYI(1, "Illegal size ret in QryIntrnlInf"); - rc = -EIO; - goto GetInodeNumOut; - } - pfinfo = (struct file_internal_info *) - (data_offset + (char *) &pSMBr->hdr.Protocol); - *inode_number = le64_to_cpu(pfinfo->UniqueId); - } - } -GetInodeNumOut: - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto GetInodeNumberRetry; - return rc; -} - -/* parses DFS refferal V3 structure - * caller is responsible for freeing target_nodes - * returns: - * on success - 0 - * on failure - errno - */ -static int -parse_DFS_referrals(TRANSACTION2_GET_DFS_REFER_RSP *pSMBr, - unsigned int *num_of_nodes, - struct dfs_info3_param **target_nodes, - const struct nls_table *nls_codepage, int remap, - const char *searchName) -{ - int i, rc = 0; - char *data_end; - bool is_unicode; - struct dfs_referral_level_3 *ref; - - if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) - is_unicode = true; - else - is_unicode = false; - *num_of_nodes = le16_to_cpu(pSMBr->NumberOfReferrals); - - if (*num_of_nodes < 1) { - cERROR(1, "num_referrals: must be at least > 0," - "but we get num_referrals = %d\n", *num_of_nodes); - rc = -EINVAL; - goto parse_DFS_referrals_exit; - } - - ref = (struct dfs_referral_level_3 *) &(pSMBr->referrals); - if (ref->VersionNumber != cpu_to_le16(3)) { - cERROR(1, "Referrals of V%d version are not supported," - "should be V3", le16_to_cpu(ref->VersionNumber)); - rc = -EINVAL; - goto parse_DFS_referrals_exit; - } - - /* get the upper boundary of the resp buffer */ - data_end = (char *)(&(pSMBr->PathConsumed)) + - le16_to_cpu(pSMBr->t2.DataCount); - - cFYI(1, "num_referrals: %d dfs flags: 0x%x ...\n", - *num_of_nodes, - le32_to_cpu(pSMBr->DFSFlags)); - - *target_nodes = kzalloc(sizeof(struct dfs_info3_param) * - *num_of_nodes, GFP_KERNEL); - if (*target_nodes == NULL) { - cERROR(1, "Failed to allocate buffer for target_nodes\n"); - rc = -ENOMEM; - goto parse_DFS_referrals_exit; - } - - /* collect necessary data from referrals */ - for (i = 0; i < *num_of_nodes; i++) { - char *temp; - int max_len; - struct dfs_info3_param *node = (*target_nodes)+i; - - node->flags = le32_to_cpu(pSMBr->DFSFlags); - if (is_unicode) { - __le16 *tmp = kmalloc(strlen(searchName)*2 + 2, - GFP_KERNEL); - if (tmp == NULL) { - rc = -ENOMEM; - goto parse_DFS_referrals_exit; - } - cifsConvertToUTF16((__le16 *) tmp, searchName, - PATH_MAX, nls_codepage, remap); - node->path_consumed = cifs_utf16_bytes(tmp, - le16_to_cpu(pSMBr->PathConsumed), - nls_codepage); - kfree(tmp); - } else - node->path_consumed = le16_to_cpu(pSMBr->PathConsumed); - - node->server_type = le16_to_cpu(ref->ServerType); - node->ref_flag = le16_to_cpu(ref->ReferralEntryFlags); - - /* copy DfsPath */ - temp = (char *)ref + le16_to_cpu(ref->DfsPathOffset); - max_len = data_end - temp; - node->path_name = cifs_strndup_from_utf16(temp, max_len, - is_unicode, nls_codepage); - if (!node->path_name) { - rc = -ENOMEM; - goto parse_DFS_referrals_exit; - } - - /* copy link target UNC */ - temp = (char *)ref + le16_to_cpu(ref->NetworkAddressOffset); - max_len = data_end - temp; - node->node_name = cifs_strndup_from_utf16(temp, max_len, - is_unicode, nls_codepage); - if (!node->node_name) { - rc = -ENOMEM; - goto parse_DFS_referrals_exit; - } - - ref++; - } - -parse_DFS_referrals_exit: - if (rc) { - free_dfs_info_array(*target_nodes, *num_of_nodes); - *target_nodes = NULL; - *num_of_nodes = 0; - } - return rc; -} - -int -CIFSGetDFSRefer(const int xid, struct cifs_ses *ses, - const unsigned char *searchName, - struct dfs_info3_param **target_nodes, - unsigned int *num_of_nodes, - const struct nls_table *nls_codepage, int remap) -{ -/* TRANS2_GET_DFS_REFERRAL */ - TRANSACTION2_GET_DFS_REFER_REQ *pSMB = NULL; - TRANSACTION2_GET_DFS_REFER_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - __u16 params, byte_count; - *num_of_nodes = 0; - *target_nodes = NULL; - - cFYI(1, "In GetDFSRefer the path %s", searchName); - if (ses == NULL) - return -ENODEV; -getDFSRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, NULL, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - /* server pointer checked in called function, - but should never be null here anyway */ - pSMB->hdr.Mid = GetNextMid(ses->server); - pSMB->hdr.Tid = ses->ipc_tid; - pSMB->hdr.Uid = ses->Suid; - if (ses->capabilities & CAP_STATUS32) - pSMB->hdr.Flags2 |= SMBFLG2_ERR_STATUS; - if (ses->capabilities & CAP_DFS) - pSMB->hdr.Flags2 |= SMBFLG2_DFS; - - if (ses->capabilities & CAP_UNICODE) { - pSMB->hdr.Flags2 |= SMBFLG2_UNICODE; - name_len = - cifsConvertToUTF16((__le16 *) pSMB->RequestFileName, - searchName, PATH_MAX, nls_codepage, - remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->RequestFileName, searchName, name_len); - } - - if (ses->server) { - if (ses->server->sec_mode & - (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) - pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; - } - - pSMB->hdr.Uid = ses->Suid; - - params = 2 /* level */ + name_len /*includes null */ ; - pSMB->TotalDataCount = 0; - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->MaxParameterCount = 0; - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(4000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_get_dfs_refer_req, MaxReferralLevel) - 4); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_GET_DFS_REFERRAL); - byte_count = params + 3 /* pad */ ; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->MaxReferralLevel = cpu_to_le16(3); - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in GetDFSRefer = %d", rc); - goto GetDFSRefExit; - } - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - /* BB Also check if enough total bytes returned? */ - if (rc || get_bcc(&pSMBr->hdr) < 17) { - rc = -EIO; /* bad smb */ - goto GetDFSRefExit; - } - - cFYI(1, "Decoding GetDFSRefer response BCC: %d Offset %d", - get_bcc(&pSMBr->hdr), - le16_to_cpu(pSMBr->t2.DataOffset)); - - /* parse returned result into more usable form */ - rc = parse_DFS_referrals(pSMBr, num_of_nodes, - target_nodes, nls_codepage, remap, - searchName); - -GetDFSRefExit: - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto getDFSRetry; - - return rc; -} - -/* Query File System Info such as free space to old servers such as Win 9x */ -int -SMBOldQFSInfo(const int xid, struct cifs_tcon *tcon, struct kstatfs *FSData) -{ -/* level 0x01 SMB_QUERY_FILE_SYSTEM_INFO */ - TRANSACTION2_QFSI_REQ *pSMB = NULL; - TRANSACTION2_QFSI_RSP *pSMBr = NULL; - FILE_SYSTEM_ALLOC_INFO *response_data; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count; - - cFYI(1, "OldQFSInfo"); -oldQFSInfoRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 2; /* level */ - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qfsi_req, InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION); - pSMB->InformationLevel = cpu_to_le16(SMB_INFO_ALLOCATION); - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QFSInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < 18) - rc = -EIO; /* bad smb */ - else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - cFYI(1, "qfsinf resp BCC: %d Offset %d", - get_bcc(&pSMBr->hdr), data_offset); - - response_data = (FILE_SYSTEM_ALLOC_INFO *) - (((char *) &pSMBr->hdr.Protocol) + data_offset); - FSData->f_bsize = - le16_to_cpu(response_data->BytesPerSector) * - le32_to_cpu(response_data-> - SectorsPerAllocationUnit); - FSData->f_blocks = - le32_to_cpu(response_data->TotalAllocationUnits); - FSData->f_bfree = FSData->f_bavail = - le32_to_cpu(response_data->FreeAllocationUnits); - cFYI(1, "Blocks: %lld Free: %lld Block size %ld", - (unsigned long long)FSData->f_blocks, - (unsigned long long)FSData->f_bfree, - FSData->f_bsize); - } - } - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto oldQFSInfoRetry; - - return rc; -} - -int -CIFSSMBQFSInfo(const int xid, struct cifs_tcon *tcon, struct kstatfs *FSData) -{ -/* level 0x103 SMB_QUERY_FILE_SYSTEM_INFO */ - TRANSACTION2_QFSI_REQ *pSMB = NULL; - TRANSACTION2_QFSI_RSP *pSMBr = NULL; - FILE_SYSTEM_INFO *response_data; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count; - - cFYI(1, "In QFSInfo"); -QFSInfoRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 2; /* level */ - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qfsi_req, InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION); - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_SIZE_INFO); - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QFSInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < 24) - rc = -EIO; /* bad smb */ - else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - - response_data = - (FILE_SYSTEM_INFO - *) (((char *) &pSMBr->hdr.Protocol) + - data_offset); - FSData->f_bsize = - le32_to_cpu(response_data->BytesPerSector) * - le32_to_cpu(response_data-> - SectorsPerAllocationUnit); - FSData->f_blocks = - le64_to_cpu(response_data->TotalAllocationUnits); - FSData->f_bfree = FSData->f_bavail = - le64_to_cpu(response_data->FreeAllocationUnits); - cFYI(1, "Blocks: %lld Free: %lld Block size %ld", - (unsigned long long)FSData->f_blocks, - (unsigned long long)FSData->f_bfree, - FSData->f_bsize); - } - } - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto QFSInfoRetry; - - return rc; -} - -int -CIFSSMBQFSAttributeInfo(const int xid, struct cifs_tcon *tcon) -{ -/* level 0x105 SMB_QUERY_FILE_SYSTEM_INFO */ - TRANSACTION2_QFSI_REQ *pSMB = NULL; - TRANSACTION2_QFSI_RSP *pSMBr = NULL; - FILE_SYSTEM_ATTRIBUTE_INFO *response_data; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count; - - cFYI(1, "In QFSAttributeInfo"); -QFSAttributeRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 2; /* level */ - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qfsi_req, InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION); - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_ATTRIBUTE_INFO); - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cERROR(1, "Send error in QFSAttributeInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < 13) { - /* BB also check if enough bytes returned */ - rc = -EIO; /* bad smb */ - } else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - response_data = - (FILE_SYSTEM_ATTRIBUTE_INFO - *) (((char *) &pSMBr->hdr.Protocol) + - data_offset); - memcpy(&tcon->fsAttrInfo, response_data, - sizeof(FILE_SYSTEM_ATTRIBUTE_INFO)); - } - } - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto QFSAttributeRetry; - - return rc; -} - -int -CIFSSMBQFSDeviceInfo(const int xid, struct cifs_tcon *tcon) -{ -/* level 0x104 SMB_QUERY_FILE_SYSTEM_INFO */ - TRANSACTION2_QFSI_REQ *pSMB = NULL; - TRANSACTION2_QFSI_RSP *pSMBr = NULL; - FILE_SYSTEM_DEVICE_INFO *response_data; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count; - - cFYI(1, "In QFSDeviceInfo"); -QFSDeviceRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 2; /* level */ - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qfsi_req, InformationLevel) - 4); - - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION); - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_DEVICE_INFO); - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QFSDeviceInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < - sizeof(FILE_SYSTEM_DEVICE_INFO)) - rc = -EIO; /* bad smb */ - else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - response_data = - (FILE_SYSTEM_DEVICE_INFO *) - (((char *) &pSMBr->hdr.Protocol) + - data_offset); - memcpy(&tcon->fsDevInfo, response_data, - sizeof(FILE_SYSTEM_DEVICE_INFO)); - } - } - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto QFSDeviceRetry; - - return rc; -} - -int -CIFSSMBQFSUnixInfo(const int xid, struct cifs_tcon *tcon) -{ -/* level 0x200 SMB_QUERY_CIFS_UNIX_INFO */ - TRANSACTION2_QFSI_REQ *pSMB = NULL; - TRANSACTION2_QFSI_RSP *pSMBr = NULL; - FILE_SYSTEM_UNIX_INFO *response_data; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count; - - cFYI(1, "In QFSUnixInfo"); -QFSUnixRetry: - rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, tcon, - (void **) &pSMB, (void **) &pSMBr); - if (rc) - return rc; - - params = 2; /* level */ - pSMB->TotalDataCount = 0; - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(100); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - byte_count = params + 1 /* pad */ ; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(offsetof(struct - smb_com_transaction2_qfsi_req, InformationLevel) - 4); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION); - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_CIFS_UNIX_INFO); - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cERROR(1, "Send error in QFSUnixInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < 13) { - rc = -EIO; /* bad smb */ - } else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - response_data = - (FILE_SYSTEM_UNIX_INFO - *) (((char *) &pSMBr->hdr.Protocol) + - data_offset); - memcpy(&tcon->fsUnixInfo, response_data, - sizeof(FILE_SYSTEM_UNIX_INFO)); - } - } - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto QFSUnixRetry; - - - return rc; -} - -int -CIFSSMBSetFSUnixInfo(const int xid, struct cifs_tcon *tcon, __u64 cap) -{ -/* level 0x200 SMB_SET_CIFS_UNIX_INFO */ - TRANSACTION2_SETFSI_REQ *pSMB = NULL; - TRANSACTION2_SETFSI_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned = 0; - __u16 params, param_offset, offset, byte_count; - - cFYI(1, "In SETFSUnixInfo"); -SETFSUnixRetry: - /* BB switch to small buf init to save memory */ - rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, tcon, - (void **) &pSMB, (void **) &pSMBr); - if (rc) - return rc; - - params = 4; /* 2 bytes zero followed by info level. */ - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_setfsi_req, FileNum) - - 4; - offset = param_offset + params; - - pSMB->MaxParameterCount = cpu_to_le16(4); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(100); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FS_INFORMATION); - byte_count = 1 /* pad */ + params + 12; - - pSMB->DataCount = cpu_to_le16(12); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - - /* Params. */ - pSMB->FileNum = 0; - pSMB->InformationLevel = cpu_to_le16(SMB_SET_CIFS_UNIX_INFO); - - /* Data. */ - pSMB->ClientUnixMajor = cpu_to_le16(CIFS_UNIX_MAJOR_VERSION); - pSMB->ClientUnixMinor = cpu_to_le16(CIFS_UNIX_MINOR_VERSION); - pSMB->ClientUnixCap = cpu_to_le64(cap); - - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cERROR(1, "Send error in SETFSUnixInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - if (rc) - rc = -EIO; /* bad smb */ - } - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto SETFSUnixRetry; - - return rc; -} - - - -int -CIFSSMBQFSPosixInfo(const int xid, struct cifs_tcon *tcon, - struct kstatfs *FSData) -{ -/* level 0x201 SMB_QUERY_CIFS_POSIX_INFO */ - TRANSACTION2_QFSI_REQ *pSMB = NULL; - TRANSACTION2_QFSI_RSP *pSMBr = NULL; - FILE_SYSTEM_POSIX_INFO *response_data; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count; - - cFYI(1, "In QFSPosixInfo"); -QFSPosixRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - params = 2; /* level */ - pSMB->TotalDataCount = 0; - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(100); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - byte_count = params + 1 /* pad */ ; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(offsetof(struct - smb_com_transaction2_qfsi_req, InformationLevel) - 4); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION); - pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_FS_INFO); - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QFSUnixInfo = %d", rc); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - - if (rc || get_bcc(&pSMBr->hdr) < 13) { - rc = -EIO; /* bad smb */ - } else { - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - response_data = - (FILE_SYSTEM_POSIX_INFO - *) (((char *) &pSMBr->hdr.Protocol) + - data_offset); - FSData->f_bsize = - le32_to_cpu(response_data->BlockSize); - FSData->f_blocks = - le64_to_cpu(response_data->TotalBlocks); - FSData->f_bfree = - le64_to_cpu(response_data->BlocksAvail); - if (response_data->UserBlocksAvail == cpu_to_le64(-1)) { - FSData->f_bavail = FSData->f_bfree; - } else { - FSData->f_bavail = - le64_to_cpu(response_data->UserBlocksAvail); - } - if (response_data->TotalFileNodes != cpu_to_le64(-1)) - FSData->f_files = - le64_to_cpu(response_data->TotalFileNodes); - if (response_data->FreeFileNodes != cpu_to_le64(-1)) - FSData->f_ffree = - le64_to_cpu(response_data->FreeFileNodes); - } - } - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto QFSPosixRetry; - - return rc; -} - - -/* We can not use write of zero bytes trick to - set file size due to need for large file support. Also note that - this SetPathInfo is preferred to SetFileInfo based method in next - routine which is only needed to work around a sharing violation bug - in Samba which this routine can run into */ - -int -CIFSSMBSetEOF(const int xid, struct cifs_tcon *tcon, const char *fileName, - __u64 size, bool SetAllocation, - const struct nls_table *nls_codepage, int remap) -{ - struct smb_com_transaction2_spi_req *pSMB = NULL; - struct smb_com_transaction2_spi_rsp *pSMBr = NULL; - struct file_end_of_file_info *parm_data; - int name_len; - int rc = 0; - int bytes_returned = 0; - __u16 params, byte_count, data_count, param_offset, offset; - - cFYI(1, "In SetEOF"); -SetEOFRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); - } - params = 6 + name_len; - data_count = sizeof(struct file_end_of_file_info); - pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = cpu_to_le16(4100); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - if (SetAllocation) { - if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU) - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2); - else - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO); - } else /* Set File Size */ { - if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU) - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO2); - else - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO); - } - - parm_data = - (struct file_end_of_file_info *) (((char *) &pSMB->hdr.Protocol) + - offset); - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - byte_count = 3 /* pad */ + params + data_count; - pSMB->DataCount = cpu_to_le16(data_count); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - parm_data->FileSize = cpu_to_le64(size); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cFYI(1, "SetPathInfo (file size) returned %d", rc); - - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto SetEOFRetry; - - return rc; -} - -int -CIFSSMBSetFileSize(const int xid, struct cifs_tcon *tcon, __u64 size, - __u16 fid, __u32 pid_of_opener, bool SetAllocation) -{ - struct smb_com_transaction2_sfi_req *pSMB = NULL; - struct file_end_of_file_info *parm_data; - int rc = 0; - __u16 params, param_offset, offset, byte_count, count; - - cFYI(1, "SetFileSize (via SetFileInfo) %lld", - (long long)size); - rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB); - - if (rc) - return rc; - - pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener); - pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16)); - - params = 6; - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4; - offset = param_offset + params; - - count = sizeof(struct file_end_of_file_info); - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION); - byte_count = 3 /* pad */ + params + count; - pSMB->DataCount = cpu_to_le16(count); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - parm_data = - (struct file_end_of_file_info *) (((char *) &pSMB->hdr.Protocol) - + offset); - pSMB->DataOffset = cpu_to_le16(offset); - parm_data->FileSize = cpu_to_le64(size); - pSMB->Fid = fid; - if (SetAllocation) { - if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU) - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2); - else - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO); - } else /* Set File Size */ { - if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU) - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO2); - else - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO); - } - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); - if (rc) { - cFYI(1, "Send error in SetFileInfo (SetFileSize) = %d", rc); - } - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - - return rc; -} - -/* Some legacy servers such as NT4 require that the file times be set on - an open handle, rather than by pathname - this is awkward due to - potential access conflicts on the open, but it is unavoidable for these - old servers since the only other choice is to go from 100 nanosecond DCE - time and resort to the original setpathinfo level which takes the ancient - DOS time format with 2 second granularity */ -int -CIFSSMBSetFileInfo(const int xid, struct cifs_tcon *tcon, - const FILE_BASIC_INFO *data, __u16 fid, __u32 pid_of_opener) -{ - struct smb_com_transaction2_sfi_req *pSMB = NULL; - char *data_offset; - int rc = 0; - __u16 params, param_offset, offset, byte_count, count; - - cFYI(1, "Set Times (via SetFileInfo)"); - rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB); - - if (rc) - return rc; - - pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener); - pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16)); - - params = 6; - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4; - offset = param_offset + params; - - data_offset = (char *)pSMB + - offsetof(struct smb_hdr, Protocol) + offset; - - count = sizeof(FILE_BASIC_INFO); - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find max SMB PDU from sess */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION); - byte_count = 3 /* pad */ + params + count; - pSMB->DataCount = cpu_to_le16(count); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->Fid = fid; - if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU) - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO2); - else - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - memcpy(data_offset, data, sizeof(FILE_BASIC_INFO)); - rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); - if (rc) - cFYI(1, "Send error in Set Time (SetFileInfo) = %d", rc); - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - - return rc; -} - -int -CIFSSMBSetFileDisposition(const int xid, struct cifs_tcon *tcon, - bool delete_file, __u16 fid, __u32 pid_of_opener) -{ - struct smb_com_transaction2_sfi_req *pSMB = NULL; - char *data_offset; - int rc = 0; - __u16 params, param_offset, offset, byte_count, count; - - cFYI(1, "Set File Disposition (via SetFileInfo)"); - rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB); - - if (rc) - return rc; - - pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener); - pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16)); - - params = 6; - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4; - offset = param_offset + params; - - data_offset = (char *) (&pSMB->hdr.Protocol) + offset; - - count = 1; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find max SMB PDU from sess */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION); - byte_count = 3 /* pad */ + params + count; - pSMB->DataCount = cpu_to_le16(count); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->Fid = fid; - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_DISPOSITION_INFO); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - *data_offset = delete_file ? 1 : 0; - rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); - if (rc) - cFYI(1, "Send error in SetFileDisposition = %d", rc); - - return rc; -} - -int -CIFSSMBSetPathInfo(const int xid, struct cifs_tcon *tcon, - const char *fileName, const FILE_BASIC_INFO *data, - const struct nls_table *nls_codepage, int remap) -{ - TRANSACTION2_SPI_REQ *pSMB = NULL; - TRANSACTION2_SPI_RSP *pSMBr = NULL; - int name_len; - int rc = 0; - int bytes_returned = 0; - char *data_offset; - __u16 params, param_offset, offset, byte_count, count; - - cFYI(1, "In SetTimes"); - -SetTimesRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); - } - - params = 6 + name_len; - count = sizeof(FILE_BASIC_INFO); - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - data_offset = (char *) (&pSMB->hdr.Protocol) + offset; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - byte_count = 3 /* pad */ + params + count; - - pSMB->DataCount = cpu_to_le16(count); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU) - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO2); - else - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - memcpy(data_offset, data, sizeof(FILE_BASIC_INFO)); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cFYI(1, "SetPathInfo (times) returned %d", rc); - - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto SetTimesRetry; - - return rc; -} - -/* Can not be used to set time stamps yet (due to old DOS time format) */ -/* Can be used to set attributes */ -#if 0 /* Possibly not needed - since it turns out that strangely NT4 has a bug - handling it anyway and NT4 was what we thought it would be needed for - Do not delete it until we prove whether needed for Win9x though */ -int -CIFSSMBSetAttrLegacy(int xid, struct cifs_tcon *tcon, char *fileName, - __u16 dos_attrs, const struct nls_table *nls_codepage) -{ - SETATTR_REQ *pSMB = NULL; - SETATTR_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int name_len; - - cFYI(1, "In SetAttrLegacy"); - -SetAttrLgcyRetry: - rc = smb_init(SMB_COM_SETATTR, 8, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - ConvertToUTF16((__le16 *) pSMB->fileName, fileName, - PATH_MAX, nls_codepage); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->fileName, fileName, name_len); - } - pSMB->attr = cpu_to_le16(dos_attrs); - pSMB->BufferFormat = 0x04; - inc_rfc1001_len(pSMB, name_len + 1); - pSMB->ByteCount = cpu_to_le16(name_len + 1); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cFYI(1, "Error in LegacySetAttr = %d", rc); - - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto SetAttrLgcyRetry; - - return rc; -} -#endif /* temporarily unneeded SetAttr legacy function */ - -static void -cifs_fill_unix_set_info(FILE_UNIX_BASIC_INFO *data_offset, - const struct cifs_unix_set_info_args *args) -{ - u64 mode = args->mode; - - /* - * Samba server ignores set of file size to zero due to bugs in some - * older clients, but we should be precise - we use SetFileSize to - * set file size and do not want to truncate file size to zero - * accidentally as happened on one Samba server beta by putting - * zero instead of -1 here - */ - data_offset->EndOfFile = cpu_to_le64(NO_CHANGE_64); - data_offset->NumOfBytes = cpu_to_le64(NO_CHANGE_64); - data_offset->LastStatusChange = cpu_to_le64(args->ctime); - data_offset->LastAccessTime = cpu_to_le64(args->atime); - data_offset->LastModificationTime = cpu_to_le64(args->mtime); - data_offset->Uid = cpu_to_le64(args->uid); - data_offset->Gid = cpu_to_le64(args->gid); - /* better to leave device as zero when it is */ - data_offset->DevMajor = cpu_to_le64(MAJOR(args->device)); - data_offset->DevMinor = cpu_to_le64(MINOR(args->device)); - data_offset->Permissions = cpu_to_le64(mode); - - if (S_ISREG(mode)) - data_offset->Type = cpu_to_le32(UNIX_FILE); - else if (S_ISDIR(mode)) - data_offset->Type = cpu_to_le32(UNIX_DIR); - else if (S_ISLNK(mode)) - data_offset->Type = cpu_to_le32(UNIX_SYMLINK); - else if (S_ISCHR(mode)) - data_offset->Type = cpu_to_le32(UNIX_CHARDEV); - else if (S_ISBLK(mode)) - data_offset->Type = cpu_to_le32(UNIX_BLOCKDEV); - else if (S_ISFIFO(mode)) - data_offset->Type = cpu_to_le32(UNIX_FIFO); - else if (S_ISSOCK(mode)) - data_offset->Type = cpu_to_le32(UNIX_SOCKET); -} - -int -CIFSSMBUnixSetFileInfo(const int xid, struct cifs_tcon *tcon, - const struct cifs_unix_set_info_args *args, - u16 fid, u32 pid_of_opener) -{ - struct smb_com_transaction2_sfi_req *pSMB = NULL; - char *data_offset; - int rc = 0; - u16 params, param_offset, offset, byte_count, count; - - cFYI(1, "Set Unix Info (via SetFileInfo)"); - rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB); - - if (rc) - return rc; - - pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener); - pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16)); - - params = 6; - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4; - offset = param_offset + params; - - data_offset = (char *)pSMB + - offsetof(struct smb_hdr, Protocol) + offset; - - count = sizeof(FILE_UNIX_BASIC_INFO); - - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find max SMB PDU from sess */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION); - byte_count = 3 /* pad */ + params + count; - pSMB->DataCount = cpu_to_le16(count); - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->Fid = fid; - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_BASIC); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - cifs_fill_unix_set_info((FILE_UNIX_BASIC_INFO *)data_offset, args); - - rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); - if (rc) - cFYI(1, "Send error in Set Time (SetFileInfo) = %d", rc); - - /* Note: On -EAGAIN error only caller can retry on handle based calls - since file handle passed in no longer valid */ - - return rc; -} - -int -CIFSSMBUnixSetPathInfo(const int xid, struct cifs_tcon *tcon, char *fileName, - const struct cifs_unix_set_info_args *args, - const struct nls_table *nls_codepage, int remap) -{ - TRANSACTION2_SPI_REQ *pSMB = NULL; - TRANSACTION2_SPI_RSP *pSMBr = NULL; - int name_len; - int rc = 0; - int bytes_returned = 0; - FILE_UNIX_BASIC_INFO *data_offset; - __u16 params, param_offset, offset, count, byte_count; - - cFYI(1, "In SetUID/GID/Mode"); -setPermsRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); - } - - params = 6 + name_len; - count = sizeof(FILE_UNIX_BASIC_INFO); - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - data_offset = - (FILE_UNIX_BASIC_INFO *) ((char *) &pSMB->hdr.Protocol + - offset); - memset(data_offset, 0, count); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - byte_count = 3 /* pad */ + params + count; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->DataCount = cpu_to_le16(count); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_BASIC); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - - cifs_fill_unix_set_info(data_offset, args); - - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cFYI(1, "SetPathInfo (perms) returned %d", rc); - - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto setPermsRetry; - return rc; -} - -#ifdef CONFIG_CIFS_XATTR -/* - * Do a path-based QUERY_ALL_EAS call and parse the result. This is a common - * function used by listxattr and getxattr type calls. When ea_name is set, - * it looks for that attribute name and stuffs that value into the EAData - * buffer. When ea_name is NULL, it stuffs a list of attribute names into the - * buffer. In both cases, the return value is either the length of the - * resulting data or a negative error code. If EAData is a NULL pointer then - * the data isn't copied to it, but the length is returned. - */ -ssize_t -CIFSSMBQAllEAs(const int xid, struct cifs_tcon *tcon, - const unsigned char *searchName, const unsigned char *ea_name, - char *EAData, size_t buf_size, - const struct nls_table *nls_codepage, int remap) -{ - /* BB assumes one setup word */ - TRANSACTION2_QPI_REQ *pSMB = NULL; - TRANSACTION2_QPI_RSP *pSMBr = NULL; - int rc = 0; - int bytes_returned; - int list_len; - struct fealist *ea_response_data; - struct fea *temp_fea; - char *temp_ptr; - char *end_of_smb; - __u16 params, byte_count, data_offset; - unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; - - cFYI(1, "In Query All EAs path %s", searchName); -QAllEAsRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - list_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName, - PATH_MAX, nls_codepage, remap); - list_len++; /* trailing null */ - list_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - list_len = strnlen(searchName, PATH_MAX); - list_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, list_len); - } - - params = 2 /* level */ + 4 /* reserved */ + list_len /* includes NUL */; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find exact max SMB PDU from sess structure BB */ - pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - pSMB->ParameterOffset = cpu_to_le16(offsetof( - struct smb_com_transaction2_qpi_req, InformationLevel) - 4); - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION); - byte_count = params + 1 /* pad */ ; - pSMB->TotalParameterCount = cpu_to_le16(params); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->InformationLevel = cpu_to_le16(SMB_INFO_QUERY_ALL_EAS); - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) { - cFYI(1, "Send error in QueryAllEAs = %d", rc); - goto QAllEAsOut; - } - - - /* BB also check enough total bytes returned */ - /* BB we need to improve the validity checking - of these trans2 responses */ - - rc = validate_t2((struct smb_t2_rsp *)pSMBr); - if (rc || get_bcc(&pSMBr->hdr) < 4) { - rc = -EIO; /* bad smb */ - goto QAllEAsOut; - } - - /* check that length of list is not more than bcc */ - /* check that each entry does not go beyond length - of list */ - /* check that each element of each entry does not - go beyond end of list */ - /* validate_trans2_offsets() */ - /* BB check if start of smb + data_offset > &bcc+ bcc */ - - data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - ea_response_data = (struct fealist *) - (((char *) &pSMBr->hdr.Protocol) + data_offset); - - list_len = le32_to_cpu(ea_response_data->list_len); - cFYI(1, "ea length %d", list_len); - if (list_len <= 8) { - cFYI(1, "empty EA list returned from server"); - goto QAllEAsOut; - } - - /* make sure list_len doesn't go past end of SMB */ - end_of_smb = (char *)pByteArea(&pSMBr->hdr) + get_bcc(&pSMBr->hdr); - if ((char *)ea_response_data + list_len > end_of_smb) { - cFYI(1, "EA list appears to go beyond SMB"); - rc = -EIO; - goto QAllEAsOut; - } - - /* account for ea list len */ - list_len -= 4; - temp_fea = ea_response_data->list; - temp_ptr = (char *)temp_fea; - while (list_len > 0) { - unsigned int name_len; - __u16 value_len; - - list_len -= 4; - temp_ptr += 4; - /* make sure we can read name_len and value_len */ - if (list_len < 0) { - cFYI(1, "EA entry goes beyond length of list"); - rc = -EIO; - goto QAllEAsOut; - } - - name_len = temp_fea->name_len; - value_len = le16_to_cpu(temp_fea->value_len); - list_len -= name_len + 1 + value_len; - if (list_len < 0) { - cFYI(1, "EA entry goes beyond length of list"); - rc = -EIO; - goto QAllEAsOut; - } - - if (ea_name) { - if (ea_name_len == name_len && - memcmp(ea_name, temp_ptr, name_len) == 0) { - temp_ptr += name_len + 1; - rc = value_len; - if (buf_size == 0) - goto QAllEAsOut; - if ((size_t)value_len > buf_size) { - rc = -ERANGE; - goto QAllEAsOut; - } - memcpy(EAData, temp_ptr, value_len); - goto QAllEAsOut; - } - } else { - /* account for prefix user. and trailing null */ - rc += (5 + 1 + name_len); - if (rc < (int) buf_size) { - memcpy(EAData, "user.", 5); - EAData += 5; - memcpy(EAData, temp_ptr, name_len); - EAData += name_len; - /* null terminate name */ - *EAData = 0; - ++EAData; - } else if (buf_size == 0) { - /* skip copy - calc size only */ - } else { - /* stop before overrun buffer */ - rc = -ERANGE; - break; - } - } - temp_ptr += name_len + 1 + value_len; - temp_fea = (struct fea *)temp_ptr; - } - - /* didn't find the named attribute */ - if (ea_name) - rc = -ENODATA; - -QAllEAsOut: - cifs_buf_release(pSMB); - if (rc == -EAGAIN) - goto QAllEAsRetry; - - return (ssize_t)rc; -} - -int -CIFSSMBSetEA(const int xid, struct cifs_tcon *tcon, const char *fileName, - const char *ea_name, const void *ea_value, - const __u16 ea_value_len, const struct nls_table *nls_codepage, - int remap) -{ - struct smb_com_transaction2_spi_req *pSMB = NULL; - struct smb_com_transaction2_spi_rsp *pSMBr = NULL; - struct fealist *parm_data; - int name_len; - int rc = 0; - int bytes_returned = 0; - __u16 params, param_offset, byte_count, offset, count; - - cFYI(1, "In SetEA"); -SetEARetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName, - PATH_MAX, nls_codepage, remap); - name_len++; /* trailing null */ - name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); - } - - params = 6 + name_len; - - /* done calculating parms using name_len of file name, - now use name_len to calculate length of ea name - we are going to create in the inode xattrs */ - if (ea_name == NULL) - name_len = 0; - else - name_len = strnlen(ea_name, 255); - - count = sizeof(*parm_data) + ea_value_len + name_len; - pSMB->MaxParameterCount = cpu_to_le16(2); - /* BB find max SMB PDU from sess */ - pSMB->MaxDataCount = cpu_to_le16(1000); - pSMB->MaxSetupCount = 0; - pSMB->Reserved = 0; - pSMB->Flags = 0; - pSMB->Timeout = 0; - pSMB->Reserved2 = 0; - param_offset = offsetof(struct smb_com_transaction2_spi_req, - InformationLevel) - 4; - offset = param_offset + params; - pSMB->InformationLevel = - cpu_to_le16(SMB_SET_FILE_EA); - - parm_data = - (struct fealist *) (((char *) &pSMB->hdr.Protocol) + - offset); - pSMB->ParameterOffset = cpu_to_le16(param_offset); - pSMB->DataOffset = cpu_to_le16(offset); - pSMB->SetupCount = 1; - pSMB->Reserved3 = 0; - pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION); - byte_count = 3 /* pad */ + params + count; - pSMB->DataCount = cpu_to_le16(count); - parm_data->list_len = cpu_to_le32(count); - parm_data->list[0].EA_flags = 0; - /* we checked above that name len is less than 255 */ - parm_data->list[0].name_len = (__u8)name_len; - /* EA names are always ASCII */ - if (ea_name) - strncpy(parm_data->list[0].name, ea_name, name_len); - parm_data->list[0].name[name_len] = 0; - parm_data->list[0].value_len = cpu_to_le16(ea_value_len); - /* caller ensures that ea_value_len is less than 64K but - we need to ensure that it fits within the smb */ - - /*BB add length check to see if it would fit in - negotiated SMB buffer size BB */ - /* if (ea_value_len > buffer_size - 512 (enough for header)) */ - if (ea_value_len) - memcpy(parm_data->list[0].name+name_len+1, - ea_value, ea_value_len); - - pSMB->TotalDataCount = pSMB->DataCount; - pSMB->ParameterCount = cpu_to_le16(params); - pSMB->TotalParameterCount = pSMB->ParameterCount; - pSMB->Reserved4 = 0; - inc_rfc1001_len(pSMB, byte_count); - pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *) pSMBr, &bytes_returned, 0); - if (rc) - cFYI(1, "SetPathInfo (EA) returned %d", rc); - - cifs_buf_release(pSMB); - - if (rc == -EAGAIN) - goto SetEARetry; - - return rc; -} -#endif - -#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* BB unused temporarily */ -/* - * Years ago the kernel added a "dnotify" function for Samba server, - * to allow network clients (such as Windows) to display updated - * lists of files in directory listings automatically when - * files are added by one user when another user has the - * same directory open on their desktop. The Linux cifs kernel - * client hooked into the kernel side of this interface for - * the same reason, but ironically when the VFS moved from - * "dnotify" to "inotify" it became harder to plug in Linux - * network file system clients (the most obvious use case - * for notify interfaces is when multiple users can update - * the contents of the same directory - exactly what network - * file systems can do) although the server (Samba) could - * still use it. For the short term we leave the worker - * function ifdeffed out (below) until inotify is fixed - * in the VFS to make it easier to plug in network file - * system clients. If inotify turns out to be permanently - * incompatible for network fs clients, we could instead simply - * expose this config flag by adding a future cifs (and smb2) notify ioctl. - */ -int CIFSSMBNotify(const int xid, struct cifs_tcon *tcon, - const int notify_subdirs, const __u16 netfid, - __u32 filter, struct file *pfile, int multishot, - const struct nls_table *nls_codepage) -{ - int rc = 0; - struct smb_com_transaction_change_notify_req *pSMB = NULL; - struct smb_com_ntransaction_change_notify_rsp *pSMBr = NULL; - struct dir_notify_req *dnotify_req; - int bytes_returned; - - cFYI(1, "In CIFSSMBNotify for file handle %d", (int)netfid); - rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->TotalParameterCount = 0 ; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le32(2); - pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00); - pSMB->MaxSetupCount = 4; - pSMB->Reserved = 0; - pSMB->ParameterOffset = 0; - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 4; /* single byte does not need le conversion */ - pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_NOTIFY_CHANGE); - pSMB->ParameterCount = pSMB->TotalParameterCount; - if (notify_subdirs) - pSMB->WatchTree = 1; /* one byte - no le conversion needed */ - pSMB->Reserved2 = 0; - pSMB->CompletionFilter = cpu_to_le32(filter); - pSMB->Fid = netfid; /* file handle always le */ - pSMB->ByteCount = 0; - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *)pSMBr, &bytes_returned, - CIFS_ASYNC_OP); - if (rc) { - cFYI(1, "Error in Notify = %d", rc); - } else { - /* Add file to outstanding requests */ - /* BB change to kmem cache alloc */ - dnotify_req = kmalloc( - sizeof(struct dir_notify_req), - GFP_KERNEL); - if (dnotify_req) { - dnotify_req->Pid = pSMB->hdr.Pid; - dnotify_req->PidHigh = pSMB->hdr.PidHigh; - dnotify_req->Mid = pSMB->hdr.Mid; - dnotify_req->Tid = pSMB->hdr.Tid; - dnotify_req->Uid = pSMB->hdr.Uid; - dnotify_req->netfid = netfid; - dnotify_req->pfile = pfile; - dnotify_req->filter = filter; - dnotify_req->multishot = multishot; - spin_lock(&GlobalMid_Lock); - list_add_tail(&dnotify_req->lhead, - &GlobalDnotifyReqList); - spin_unlock(&GlobalMid_Lock); - } else - rc = -ENOMEM; - } - cifs_buf_release(pSMB); - return rc; -} -#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |