diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/cifs/connect.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/cifs/connect.c | 4348 |
1 files changed, 0 insertions, 4348 deletions
diff --git a/ANDROID_3.4.5/fs/cifs/connect.c b/ANDROID_3.4.5/fs/cifs/connect.c deleted file mode 100644 index 402fa0f9..00000000 --- a/ANDROID_3.4.5/fs/cifs/connect.c +++ /dev/null @@ -1,4348 +0,0 @@ -/* - * fs/cifs/connect.c - * - * Copyright (C) International Business Machines Corp., 2002,2009 - * Author(s): Steve French (sfrench@us.ibm.com) - * - * 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 - */ -#include <linux/fs.h> -#include <linux/net.h> -#include <linux/string.h> -#include <linux/list.h> -#include <linux/wait.h> -#include <linux/slab.h> -#include <linux/pagemap.h> -#include <linux/ctype.h> -#include <linux/utsname.h> -#include <linux/mempool.h> -#include <linux/delay.h> -#include <linux/completion.h> -#include <linux/kthread.h> -#include <linux/pagevec.h> -#include <linux/freezer.h> -#include <linux/namei.h> -#include <asm/uaccess.h> -#include <asm/processor.h> -#include <linux/inet.h> -#include <linux/module.h> -#include <keys/user-type.h> -#include <net/ipv6.h> -#include <linux/parser.h> - -#include "cifspdu.h" -#include "cifsglob.h" -#include "cifsproto.h" -#include "cifs_unicode.h" -#include "cifs_debug.h" -#include "cifs_fs_sb.h" -#include "ntlmssp.h" -#include "nterr.h" -#include "rfc1002pdu.h" -#include "fscache.h" - -#define CIFS_PORT 445 -#define RFC1001_PORT 139 - -/* SMB echo "timeout" -- FIXME: tunable? */ -#define SMB_ECHO_INTERVAL (60 * HZ) - -extern mempool_t *cifs_req_poolp; - -/* FIXME: should these be tunable? */ -#define TLINK_ERROR_EXPIRE (1 * HZ) -#define TLINK_IDLE_EXPIRE (600 * HZ) - -enum { - - /* Mount options that take no arguments */ - Opt_user_xattr, Opt_nouser_xattr, - Opt_forceuid, Opt_noforceuid, - Opt_noblocksend, Opt_noautotune, - Opt_hard, Opt_soft, Opt_perm, Opt_noperm, - Opt_mapchars, Opt_nomapchars, Opt_sfu, - Opt_nosfu, Opt_nodfs, Opt_posixpaths, - Opt_noposixpaths, Opt_nounix, - Opt_nocase, - Opt_brl, Opt_nobrl, - Opt_forcemandatorylock, Opt_setuids, - Opt_nosetuids, Opt_dynperm, Opt_nodynperm, - Opt_nohard, Opt_nosoft, - Opt_nointr, Opt_intr, - Opt_nostrictsync, Opt_strictsync, - Opt_serverino, Opt_noserverino, - Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, - Opt_acl, Opt_noacl, Opt_locallease, - Opt_sign, Opt_seal, Opt_direct, - Opt_strictcache, Opt_noac, - Opt_fsc, Opt_mfsymlinks, - Opt_multiuser, Opt_sloppy, - - /* Mount options which take numeric value */ - Opt_backupuid, Opt_backupgid, Opt_uid, - Opt_cruid, Opt_gid, Opt_file_mode, - Opt_dirmode, Opt_port, - Opt_rsize, Opt_wsize, Opt_actimeo, - - /* Mount options which take string value */ - Opt_user, Opt_pass, Opt_ip, - Opt_unc, Opt_domain, - Opt_srcaddr, Opt_prefixpath, - Opt_iocharset, Opt_sockopt, - Opt_netbiosname, Opt_servern, - Opt_ver, Opt_sec, - - /* Mount options to be ignored */ - Opt_ignore, - - /* Options which could be blank */ - Opt_blank_pass, - Opt_blank_user, - Opt_blank_ip, - - Opt_err -}; - -static const match_table_t cifs_mount_option_tokens = { - - { Opt_user_xattr, "user_xattr" }, - { Opt_nouser_xattr, "nouser_xattr" }, - { Opt_forceuid, "forceuid" }, - { Opt_noforceuid, "noforceuid" }, - { Opt_noblocksend, "noblocksend" }, - { Opt_noautotune, "noautotune" }, - { Opt_hard, "hard" }, - { Opt_soft, "soft" }, - { Opt_perm, "perm" }, - { Opt_noperm, "noperm" }, - { Opt_mapchars, "mapchars" }, - { Opt_nomapchars, "nomapchars" }, - { Opt_sfu, "sfu" }, - { Opt_nosfu, "nosfu" }, - { Opt_nodfs, "nodfs" }, - { Opt_posixpaths, "posixpaths" }, - { Opt_noposixpaths, "noposixpaths" }, - { Opt_nounix, "nounix" }, - { Opt_nounix, "nolinux" }, - { Opt_nocase, "nocase" }, - { Opt_nocase, "ignorecase" }, - { Opt_brl, "brl" }, - { Opt_nobrl, "nobrl" }, - { Opt_nobrl, "nolock" }, - { Opt_forcemandatorylock, "forcemandatorylock" }, - { Opt_forcemandatorylock, "forcemand" }, - { Opt_setuids, "setuids" }, - { Opt_nosetuids, "nosetuids" }, - { Opt_dynperm, "dynperm" }, - { Opt_nodynperm, "nodynperm" }, - { Opt_nohard, "nohard" }, - { Opt_nosoft, "nosoft" }, - { Opt_nointr, "nointr" }, - { Opt_intr, "intr" }, - { Opt_nostrictsync, "nostrictsync" }, - { Opt_strictsync, "strictsync" }, - { Opt_serverino, "serverino" }, - { Opt_noserverino, "noserverino" }, - { Opt_rwpidforward, "rwpidforward" }, - { Opt_cifsacl, "cifsacl" }, - { Opt_nocifsacl, "nocifsacl" }, - { Opt_acl, "acl" }, - { Opt_noacl, "noacl" }, - { Opt_locallease, "locallease" }, - { Opt_sign, "sign" }, - { Opt_seal, "seal" }, - { Opt_direct, "direct" }, - { Opt_direct, "directio" }, - { Opt_direct, "forcedirectio" }, - { Opt_strictcache, "strictcache" }, - { Opt_noac, "noac" }, - { Opt_fsc, "fsc" }, - { Opt_mfsymlinks, "mfsymlinks" }, - { Opt_multiuser, "multiuser" }, - { Opt_sloppy, "sloppy" }, - - { Opt_backupuid, "backupuid=%s" }, - { Opt_backupgid, "backupgid=%s" }, - { Opt_uid, "uid=%s" }, - { Opt_cruid, "cruid=%s" }, - { Opt_gid, "gid=%s" }, - { Opt_file_mode, "file_mode=%s" }, - { Opt_dirmode, "dirmode=%s" }, - { Opt_dirmode, "dir_mode=%s" }, - { Opt_port, "port=%s" }, - { Opt_rsize, "rsize=%s" }, - { Opt_wsize, "wsize=%s" }, - { Opt_actimeo, "actimeo=%s" }, - - { Opt_blank_user, "user=" }, - { Opt_blank_user, "username=" }, - { Opt_user, "user=%s" }, - { Opt_user, "username=%s" }, - { Opt_blank_pass, "pass=" }, - { Opt_pass, "pass=%s" }, - { Opt_pass, "password=%s" }, - { Opt_blank_ip, "ip=" }, - { Opt_blank_ip, "addr=" }, - { Opt_ip, "ip=%s" }, - { Opt_ip, "addr=%s" }, - { Opt_unc, "unc=%s" }, - { Opt_unc, "target=%s" }, - { Opt_unc, "path=%s" }, - { Opt_domain, "dom=%s" }, - { Opt_domain, "domain=%s" }, - { Opt_domain, "workgroup=%s" }, - { Opt_srcaddr, "srcaddr=%s" }, - { Opt_prefixpath, "prefixpath=%s" }, - { Opt_iocharset, "iocharset=%s" }, - { Opt_sockopt, "sockopt=%s" }, - { Opt_netbiosname, "netbiosname=%s" }, - { Opt_servern, "servern=%s" }, - { Opt_ver, "ver=%s" }, - { Opt_ver, "vers=%s" }, - { Opt_ver, "version=%s" }, - { Opt_sec, "sec=%s" }, - - { Opt_ignore, "cred" }, - { Opt_ignore, "credentials" }, - { Opt_ignore, "cred=%s" }, - { Opt_ignore, "credentials=%s" }, - { Opt_ignore, "guest" }, - { Opt_ignore, "rw" }, - { Opt_ignore, "ro" }, - { Opt_ignore, "suid" }, - { Opt_ignore, "nosuid" }, - { Opt_ignore, "exec" }, - { Opt_ignore, "noexec" }, - { Opt_ignore, "nodev" }, - { Opt_ignore, "noauto" }, - { Opt_ignore, "dev" }, - { Opt_ignore, "mand" }, - { Opt_ignore, "nomand" }, - { Opt_ignore, "_netdev" }, - - { Opt_err, NULL } -}; - -enum { - Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, - Opt_sec_ntlmsspi, Opt_sec_ntlmssp, - Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2i, - Opt_sec_nontlm, Opt_sec_lanman, - Opt_sec_none, - - Opt_sec_err -}; - -static const match_table_t cifs_secflavor_tokens = { - { Opt_sec_krb5, "krb5" }, - { Opt_sec_krb5i, "krb5i" }, - { Opt_sec_krb5p, "krb5p" }, - { Opt_sec_ntlmsspi, "ntlmsspi" }, - { Opt_sec_ntlmssp, "ntlmssp" }, - { Opt_ntlm, "ntlm" }, - { Opt_sec_ntlmi, "ntlmi" }, - { Opt_sec_ntlmv2i, "ntlmv2i" }, - { Opt_sec_nontlm, "nontlm" }, - { Opt_sec_lanman, "lanman" }, - { Opt_sec_none, "none" }, - - { Opt_sec_err, NULL } -}; - -static int ip_connect(struct TCP_Server_Info *server); -static int generic_ip_connect(struct TCP_Server_Info *server); -static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); -static void cifs_prune_tlinks(struct work_struct *work); -static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, - const char *devname); - -/* - * cifs tcp session reconnection - * - * mark tcp session as reconnecting so temporarily locked - * mark all smb sessions as reconnecting for tcp session - * reconnect tcp session - * wake up waiters on reconnection? - (not needed currently) - */ -static int -cifs_reconnect(struct TCP_Server_Info *server) -{ - int rc = 0; - struct list_head *tmp, *tmp2; - struct cifs_ses *ses; - struct cifs_tcon *tcon; - struct mid_q_entry *mid_entry; - struct list_head retry_list; - - spin_lock(&GlobalMid_Lock); - if (server->tcpStatus == CifsExiting) { - /* the demux thread will exit normally - next time through the loop */ - spin_unlock(&GlobalMid_Lock); - return rc; - } else - server->tcpStatus = CifsNeedReconnect; - spin_unlock(&GlobalMid_Lock); - server->maxBuf = 0; - - cFYI(1, "Reconnecting tcp session"); - - /* before reconnecting the tcp session, mark the smb session (uid) - and the tid bad so they are not used until reconnected */ - cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); - spin_lock(&cifs_tcp_ses_lock); - list_for_each(tmp, &server->smb_ses_list) { - ses = list_entry(tmp, struct cifs_ses, smb_ses_list); - ses->need_reconnect = true; - ses->ipc_tid = 0; - list_for_each(tmp2, &ses->tcon_list) { - tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); - tcon->need_reconnect = true; - } - } - spin_unlock(&cifs_tcp_ses_lock); - - /* do not want to be sending data on a socket we are freeing */ - cFYI(1, "%s: tearing down socket", __func__); - mutex_lock(&server->srv_mutex); - if (server->ssocket) { - cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, - server->ssocket->flags); - kernel_sock_shutdown(server->ssocket, SHUT_WR); - cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", - server->ssocket->state, - server->ssocket->flags); - sock_release(server->ssocket); - server->ssocket = NULL; - } - server->sequence_number = 0; - server->session_estab = false; - kfree(server->session_key.response); - server->session_key.response = NULL; - server->session_key.len = 0; - server->lstrp = jiffies; - mutex_unlock(&server->srv_mutex); - - /* mark submitted MIDs for retry and issue callback */ - INIT_LIST_HEAD(&retry_list); - cFYI(1, "%s: moving mids to private list", __func__); - spin_lock(&GlobalMid_Lock); - list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { - mid_entry = list_entry(tmp, struct mid_q_entry, qhead); - if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) - mid_entry->mid_state = MID_RETRY_NEEDED; - list_move(&mid_entry->qhead, &retry_list); - } - spin_unlock(&GlobalMid_Lock); - - cFYI(1, "%s: issuing mid callbacks", __func__); - list_for_each_safe(tmp, tmp2, &retry_list) { - mid_entry = list_entry(tmp, struct mid_q_entry, qhead); - list_del_init(&mid_entry->qhead); - mid_entry->callback(mid_entry); - } - - do { - try_to_freeze(); - - /* we should try only the port we connected to before */ - rc = generic_ip_connect(server); - if (rc) { - cFYI(1, "reconnect error %d", rc); - msleep(3000); - } else { - atomic_inc(&tcpSesReconnectCount); - spin_lock(&GlobalMid_Lock); - if (server->tcpStatus != CifsExiting) - server->tcpStatus = CifsNeedNegotiate; - spin_unlock(&GlobalMid_Lock); - } - } while (server->tcpStatus == CifsNeedReconnect); - - return rc; -} - -/* - return codes: - 0 not a transact2, or all data present - >0 transact2 with that much data missing - -EINVAL = invalid transact2 - - */ -static int check2ndT2(char *buf) -{ - struct smb_hdr *pSMB = (struct smb_hdr *)buf; - struct smb_t2_rsp *pSMBt; - int remaining; - __u16 total_data_size, data_in_this_rsp; - - if (pSMB->Command != SMB_COM_TRANSACTION2) - return 0; - - /* check for plausible wct, bcc and t2 data and parm sizes */ - /* check for parm and data offset going beyond end of smb */ - if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ - cFYI(1, "invalid transact2 word count"); - return -EINVAL; - } - - pSMBt = (struct smb_t2_rsp *)pSMB; - - total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); - data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); - - if (total_data_size == data_in_this_rsp) - return 0; - else if (total_data_size < data_in_this_rsp) { - cFYI(1, "total data %d smaller than data in frame %d", - total_data_size, data_in_this_rsp); - return -EINVAL; - } - - remaining = total_data_size - data_in_this_rsp; - - cFYI(1, "missing %d bytes from transact2, check next response", - remaining); - if (total_data_size > CIFSMaxBufSize) { - cERROR(1, "TotalDataSize %d is over maximum buffer %d", - total_data_size, CIFSMaxBufSize); - return -EINVAL; - } - return remaining; -} - -static int coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) -{ - struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; - struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; - char *data_area_of_tgt; - char *data_area_of_src; - int remaining; - unsigned int byte_count, total_in_tgt; - __u16 tgt_total_cnt, src_total_cnt, total_in_src; - - src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); - tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); - - if (tgt_total_cnt != src_total_cnt) - cFYI(1, "total data count of primary and secondary t2 differ " - "source=%hu target=%hu", src_total_cnt, tgt_total_cnt); - - total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); - - remaining = tgt_total_cnt - total_in_tgt; - - if (remaining < 0) { - cFYI(1, "Server sent too much data. tgt_total_cnt=%hu " - "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt); - return -EPROTO; - } - - if (remaining == 0) { - /* nothing to do, ignore */ - cFYI(1, "no more data remains"); - return 0; - } - - total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); - if (remaining < total_in_src) - cFYI(1, "transact2 2nd response contains too much data"); - - /* find end of first SMB data area */ - data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + - get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); - - /* validate target area */ - data_area_of_src = (char *)&pSMBs->hdr.Protocol + - get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); - - data_area_of_tgt += total_in_tgt; - - total_in_tgt += total_in_src; - /* is the result too big for the field? */ - if (total_in_tgt > USHRT_MAX) { - cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt); - return -EPROTO; - } - put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); - - /* fix up the BCC */ - byte_count = get_bcc(target_hdr); - byte_count += total_in_src; - /* is the result too big for the field? */ - if (byte_count > USHRT_MAX) { - cFYI(1, "coalesced BCC too large (%u)", byte_count); - return -EPROTO; - } - put_bcc(byte_count, target_hdr); - - byte_count = be32_to_cpu(target_hdr->smb_buf_length); - byte_count += total_in_src; - /* don't allow buffer to overflow */ - if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { - cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count); - return -ENOBUFS; - } - target_hdr->smb_buf_length = cpu_to_be32(byte_count); - - /* copy second buffer into end of first buffer */ - memcpy(data_area_of_tgt, data_area_of_src, total_in_src); - - if (remaining != total_in_src) { - /* more responses to go */ - cFYI(1, "waiting for more secondary responses"); - return 1; - } - - /* we are done */ - cFYI(1, "found the last secondary response"); - return 0; -} - -static void -cifs_echo_request(struct work_struct *work) -{ - int rc; - struct TCP_Server_Info *server = container_of(work, - struct TCP_Server_Info, echo.work); - - /* - * We cannot send an echo until the NEGOTIATE_PROTOCOL request is - * done, which is indicated by maxBuf != 0. Also, no need to ping if - * we got a response recently - */ - if (server->maxBuf == 0 || - time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) - goto requeue_echo; - - rc = CIFSSMBEcho(server); - if (rc) - cFYI(1, "Unable to send echo request to server: %s", - server->hostname); - -requeue_echo: - queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); -} - -static bool -allocate_buffers(struct TCP_Server_Info *server) -{ - if (!server->bigbuf) { - server->bigbuf = (char *)cifs_buf_get(); - if (!server->bigbuf) { - cERROR(1, "No memory for large SMB response"); - msleep(3000); - /* retry will check if exiting */ - return false; - } - } else if (server->large_buf) { - /* we are reusing a dirty large buf, clear its start */ - memset(server->bigbuf, 0, header_size()); - } - - if (!server->smallbuf) { - server->smallbuf = (char *)cifs_small_buf_get(); - if (!server->smallbuf) { - cERROR(1, "No memory for SMB response"); - msleep(1000); - /* retry will check if exiting */ - return false; - } - /* beginning of smb buffer is cleared in our buf_get */ - } else { - /* if existing small buf clear beginning */ - memset(server->smallbuf, 0, header_size()); - } - - return true; -} - -static bool -server_unresponsive(struct TCP_Server_Info *server) -{ - /* - * We need to wait 2 echo intervals to make sure we handle such - * situations right: - * 1s client sends a normal SMB request - * 2s client gets a response - * 30s echo workqueue job pops, and decides we got a response recently - * and don't need to send another - * ... - * 65s kernel_recvmsg times out, and we see that we haven't gotten - * a response in >60s. - */ - if (server->tcpStatus == CifsGood && - time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { - cERROR(1, "Server %s has not responded in %d seconds. " - "Reconnecting...", server->hostname, - (2 * SMB_ECHO_INTERVAL) / HZ); - cifs_reconnect(server); - wake_up(&server->response_q); - return true; - } - - return false; -} - -/* - * kvec_array_init - clone a kvec array, and advance into it - * @new: pointer to memory for cloned array - * @iov: pointer to original array - * @nr_segs: number of members in original array - * @bytes: number of bytes to advance into the cloned array - * - * This function will copy the array provided in iov to a section of memory - * and advance the specified number of bytes into the new array. It returns - * the number of segments in the new array. "new" must be at least as big as - * the original iov array. - */ -static unsigned int -kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, - size_t bytes) -{ - size_t base = 0; - - while (bytes || !iov->iov_len) { - int copy = min(bytes, iov->iov_len); - - bytes -= copy; - base += copy; - if (iov->iov_len == base) { - iov++; - nr_segs--; - base = 0; - } - } - memcpy(new, iov, sizeof(*iov) * nr_segs); - new->iov_base += base; - new->iov_len -= base; - return nr_segs; -} - -static struct kvec * -get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) -{ - struct kvec *new_iov; - - if (server->iov && nr_segs <= server->nr_iov) - return server->iov; - - /* not big enough -- allocate a new one and release the old */ - new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); - if (new_iov) { - kfree(server->iov); - server->iov = new_iov; - server->nr_iov = nr_segs; - } - return new_iov; -} - -int -cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, - unsigned int nr_segs, unsigned int to_read) -{ - int length = 0; - int total_read; - unsigned int segs; - struct msghdr smb_msg; - struct kvec *iov; - - iov = get_server_iovec(server, nr_segs); - if (!iov) - return -ENOMEM; - - smb_msg.msg_control = NULL; - smb_msg.msg_controllen = 0; - - for (total_read = 0; to_read; total_read += length, to_read -= length) { - try_to_freeze(); - - if (server_unresponsive(server)) { - total_read = -EAGAIN; - break; - } - - segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); - - length = kernel_recvmsg(server->ssocket, &smb_msg, - iov, segs, to_read, 0); - - if (server->tcpStatus == CifsExiting) { - total_read = -ESHUTDOWN; - break; - } else if (server->tcpStatus == CifsNeedReconnect) { - cifs_reconnect(server); - total_read = -EAGAIN; - break; - } else if (length == -ERESTARTSYS || - length == -EAGAIN || - length == -EINTR) { - /* - * Minimum sleep to prevent looping, allowing socket - * to clear and app threads to set tcpStatus - * CifsNeedReconnect if server hung. - */ - usleep_range(1000, 2000); - length = 0; - continue; - } else if (length <= 0) { - cFYI(1, "Received no data or error: expecting %d " - "got %d", to_read, length); - cifs_reconnect(server); - total_read = -EAGAIN; - break; - } - } - return total_read; -} - -int -cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, - unsigned int to_read) -{ - struct kvec iov; - - iov.iov_base = buf; - iov.iov_len = to_read; - - return cifs_readv_from_socket(server, &iov, 1, to_read); -} - -static bool -is_smb_response(struct TCP_Server_Info *server, unsigned char type) -{ - /* - * The first byte big endian of the length field, - * is actually not part of the length but the type - * with the most common, zero, as regular data. - */ - switch (type) { - case RFC1002_SESSION_MESSAGE: - /* Regular SMB response */ - return true; - case RFC1002_SESSION_KEEP_ALIVE: - cFYI(1, "RFC 1002 session keep alive"); - break; - case RFC1002_POSITIVE_SESSION_RESPONSE: - cFYI(1, "RFC 1002 positive session response"); - break; - case RFC1002_NEGATIVE_SESSION_RESPONSE: - /* - * We get this from Windows 98 instead of an error on - * SMB negprot response. - */ - cFYI(1, "RFC 1002 negative session response"); - /* give server a second to clean up */ - msleep(1000); - /* - * Always try 445 first on reconnect since we get NACK - * on some if we ever connected to port 139 (the NACK - * is since we do not begin with RFC1001 session - * initialize frame). - */ - cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); - cifs_reconnect(server); - wake_up(&server->response_q); - break; - default: - cERROR(1, "RFC 1002 unknown response type 0x%x", type); - cifs_reconnect(server); - } - - return false; -} - -static struct mid_q_entry * -find_mid(struct TCP_Server_Info *server, char *buffer) -{ - struct smb_hdr *buf = (struct smb_hdr *)buffer; - struct mid_q_entry *mid; - - spin_lock(&GlobalMid_Lock); - list_for_each_entry(mid, &server->pending_mid_q, qhead) { - if (mid->mid == buf->Mid && - mid->mid_state == MID_REQUEST_SUBMITTED && - le16_to_cpu(mid->command) == buf->Command) { - spin_unlock(&GlobalMid_Lock); - return mid; - } - } - spin_unlock(&GlobalMid_Lock); - return NULL; -} - -void -dequeue_mid(struct mid_q_entry *mid, bool malformed) -{ -#ifdef CONFIG_CIFS_STATS2 - mid->when_received = jiffies; -#endif - spin_lock(&GlobalMid_Lock); - if (!malformed) - mid->mid_state = MID_RESPONSE_RECEIVED; - else - mid->mid_state = MID_RESPONSE_MALFORMED; - list_del_init(&mid->qhead); - spin_unlock(&GlobalMid_Lock); -} - -static void -handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, - char *buf, int malformed) -{ - if (malformed == 0 && check2ndT2(buf) > 0) { - mid->multiRsp = true; - if (mid->resp_buf) { - /* merge response - fix up 1st*/ - malformed = coalesce_t2(buf, mid->resp_buf); - if (malformed > 0) - return; - - /* All parts received or packet is malformed. */ - mid->multiEnd = true; - return dequeue_mid(mid, malformed); - } - if (!server->large_buf) { - /*FIXME: switch to already allocated largebuf?*/ - cERROR(1, "1st trans2 resp needs bigbuf"); - } else { - /* Have first buffer */ - mid->resp_buf = buf; - mid->large_buf = true; - server->bigbuf = NULL; - } - return; - } - mid->resp_buf = buf; - mid->large_buf = server->large_buf; - /* Was previous buf put in mpx struct for multi-rsp? */ - if (!mid->multiRsp) { - /* smb buffer will be freed by user thread */ - if (server->large_buf) - server->bigbuf = NULL; - else - server->smallbuf = NULL; - } - dequeue_mid(mid, malformed); -} - -static void clean_demultiplex_info(struct TCP_Server_Info *server) -{ - int length; - - /* take it off the list, if it's not already */ - spin_lock(&cifs_tcp_ses_lock); - list_del_init(&server->tcp_ses_list); - spin_unlock(&cifs_tcp_ses_lock); - - spin_lock(&GlobalMid_Lock); - server->tcpStatus = CifsExiting; - spin_unlock(&GlobalMid_Lock); - wake_up_all(&server->response_q); - - /* check if we have blocked requests that need to free */ - spin_lock(&server->req_lock); - if (server->credits <= 0) - server->credits = 1; - spin_unlock(&server->req_lock); - /* - * Although there should not be any requests blocked on this queue it - * can not hurt to be paranoid and try to wake up requests that may - * haven been blocked when more than 50 at time were on the wire to the - * same server - they now will see the session is in exit state and get - * out of SendReceive. - */ - wake_up_all(&server->request_q); - /* give those requests time to exit */ - msleep(125); - - if (server->ssocket) { - sock_release(server->ssocket); - server->ssocket = NULL; - } - - if (!list_empty(&server->pending_mid_q)) { - struct list_head dispose_list; - struct mid_q_entry *mid_entry; - struct list_head *tmp, *tmp2; - - INIT_LIST_HEAD(&dispose_list); - spin_lock(&GlobalMid_Lock); - list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { - mid_entry = list_entry(tmp, struct mid_q_entry, qhead); - cFYI(1, "Clearing mid 0x%llx", mid_entry->mid); - mid_entry->mid_state = MID_SHUTDOWN; - list_move(&mid_entry->qhead, &dispose_list); - } - spin_unlock(&GlobalMid_Lock); - - /* now walk dispose list and issue callbacks */ - list_for_each_safe(tmp, tmp2, &dispose_list) { - mid_entry = list_entry(tmp, struct mid_q_entry, qhead); - cFYI(1, "Callback mid 0x%llx", mid_entry->mid); - list_del_init(&mid_entry->qhead); - mid_entry->callback(mid_entry); - } - /* 1/8th of sec is more than enough time for them to exit */ - msleep(125); - } - - if (!list_empty(&server->pending_mid_q)) { - /* - * mpx threads have not exited yet give them at least the smb - * send timeout time for long ops. - * - * Due to delays on oplock break requests, we need to wait at - * least 45 seconds before giving up on a request getting a - * response and going ahead and killing cifsd. - */ - cFYI(1, "Wait for exit from demultiplex thread"); - msleep(46000); - /* - * If threads still have not exited they are probably never - * coming home not much else we can do but free the memory. - */ - } - - kfree(server->hostname); - kfree(server->iov); - kfree(server); - - length = atomic_dec_return(&tcpSesAllocCount); - if (length > 0) - mempool_resize(cifs_req_poolp, length + cifs_min_rcv, - GFP_KERNEL); -} - -static int -standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) -{ - int length; - char *buf = server->smallbuf; - unsigned int pdu_length = get_rfc1002_length(buf); - - /* make sure this will fit in a large buffer */ - if (pdu_length > CIFSMaxBufSize + max_header_size() - 4) { - cERROR(1, "SMB response too long (%u bytes)", - pdu_length); - cifs_reconnect(server); - wake_up(&server->response_q); - return -EAGAIN; - } - - /* switch to large buffer if too big for a small one */ - if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { - server->large_buf = true; - memcpy(server->bigbuf, buf, server->total_read); - buf = server->bigbuf; - } - - /* now read the rest */ - length = cifs_read_from_socket(server, buf + header_size() - 1, - pdu_length - header_size() + 1 + 4); - if (length < 0) - return length; - server->total_read += length; - - dump_smb(buf, server->total_read); - - /* - * We know that we received enough to get to the MID as we - * checked the pdu_length earlier. Now check to see - * if the rest of the header is OK. We borrow the length - * var for the rest of the loop to avoid a new stack var. - * - * 48 bytes is enough to display the header and a little bit - * into the payload for debugging purposes. - */ - length = checkSMB(buf, server->total_read); - if (length != 0) - cifs_dump_mem("Bad SMB: ", buf, - min_t(unsigned int, server->total_read, 48)); - - if (!mid) - return length; - - handle_mid(mid, server, buf, length); - return 0; -} - -static int -cifs_demultiplex_thread(void *p) -{ - int length; - struct TCP_Server_Info *server = p; - unsigned int pdu_length; - char *buf = NULL; - struct task_struct *task_to_wake = NULL; - struct mid_q_entry *mid_entry; - - current->flags |= PF_MEMALLOC; - cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); - - length = atomic_inc_return(&tcpSesAllocCount); - if (length > 1) - mempool_resize(cifs_req_poolp, length + cifs_min_rcv, - GFP_KERNEL); - - set_freezable(); - while (server->tcpStatus != CifsExiting) { - if (try_to_freeze()) - continue; - - if (!allocate_buffers(server)) - continue; - - server->large_buf = false; - buf = server->smallbuf; - pdu_length = 4; /* enough to get RFC1001 header */ - - length = cifs_read_from_socket(server, buf, pdu_length); - if (length < 0) - continue; - server->total_read = length; - - /* - * The right amount was read from socket - 4 bytes, - * so we can now interpret the length field. - */ - pdu_length = get_rfc1002_length(buf); - - cFYI(1, "RFC1002 header 0x%x", pdu_length); - if (!is_smb_response(server, buf[0])) - continue; - - /* make sure we have enough to get to the MID */ - if (pdu_length < header_size() - 1 - 4) { - cERROR(1, "SMB response too short (%u bytes)", - pdu_length); - cifs_reconnect(server); - wake_up(&server->response_q); - continue; - } - - /* read down to the MID */ - length = cifs_read_from_socket(server, buf + 4, - header_size() - 1 - 4); - if (length < 0) - continue; - server->total_read += length; - - mid_entry = find_mid(server, buf); - - if (!mid_entry || !mid_entry->receive) - length = standard_receive3(server, mid_entry); - else - length = mid_entry->receive(server, mid_entry); - - if (length < 0) - continue; - - if (server->large_buf) - buf = server->bigbuf; - - server->lstrp = jiffies; - if (mid_entry != NULL) { - if (!mid_entry->multiRsp || mid_entry->multiEnd) - mid_entry->callback(mid_entry); - } else if (!is_valid_oplock_break(buf, server)) { - cERROR(1, "No task to wake, unknown frame received! " - "NumMids %d", atomic_read(&midCount)); - cifs_dump_mem("Received Data is: ", buf, header_size()); -#ifdef CONFIG_CIFS_DEBUG2 - cifs_dump_detail(buf); - cifs_dump_mids(server); -#endif /* CIFS_DEBUG2 */ - - } - } /* end while !EXITING */ - - /* buffer usually freed in free_mid - need to free it here on exit */ - cifs_buf_release(server->bigbuf); - if (server->smallbuf) /* no sense logging a debug message if NULL */ - cifs_small_buf_release(server->smallbuf); - - task_to_wake = xchg(&server->tsk, NULL); - clean_demultiplex_info(server); - - /* if server->tsk was NULL then wait for a signal before exiting */ - if (!task_to_wake) { - set_current_state(TASK_INTERRUPTIBLE); - while (!signal_pending(current)) { - schedule(); - set_current_state(TASK_INTERRUPTIBLE); - } - set_current_state(TASK_RUNNING); - } - - module_put_and_exit(0); -} - -/* extract the host portion of the UNC string */ -static char * -extract_hostname(const char *unc) -{ - const char *src; - char *dst, *delim; - unsigned int len; - - /* skip double chars at beginning of string */ - /* BB: check validity of these bytes? */ - src = unc + 2; - - /* delimiter between hostname and sharename is always '\\' now */ - delim = strchr(src, '\\'); - if (!delim) - return ERR_PTR(-EINVAL); - - len = delim - src; - dst = kmalloc((len + 1), GFP_KERNEL); - if (dst == NULL) - return ERR_PTR(-ENOMEM); - - memcpy(dst, src, len); - dst[len] = '\0'; - - return dst; -} - -static int get_option_ul(substring_t args[], unsigned long *option) -{ - int rc; - char *string; - - string = match_strdup(args); - if (string == NULL) - return -ENOMEM; - rc = kstrtoul(string, 0, option); - kfree(string); - - return rc; -} - - -static int cifs_parse_security_flavors(char *value, - struct smb_vol *vol) -{ - - substring_t args[MAX_OPT_ARGS]; - - switch (match_token(value, cifs_secflavor_tokens, args)) { - case Opt_sec_krb5: - vol->secFlg |= CIFSSEC_MAY_KRB5; - break; - case Opt_sec_krb5i: - vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN; - break; - case Opt_sec_krb5p: - /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ - cERROR(1, "Krb5 cifs privacy not supported"); - break; - case Opt_sec_ntlmssp: - vol->secFlg |= CIFSSEC_MAY_NTLMSSP; - break; - case Opt_sec_ntlmsspi: - vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; - break; - case Opt_ntlm: - /* ntlm is default so can be turned off too */ - vol->secFlg |= CIFSSEC_MAY_NTLM; - break; - case Opt_sec_ntlmi: - vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; - break; - case Opt_sec_nontlm: - vol->secFlg |= CIFSSEC_MAY_NTLMV2; - break; - case Opt_sec_ntlmv2i: - vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; - break; -#ifdef CONFIG_CIFS_WEAK_PW_HASH - case Opt_sec_lanman: - vol->secFlg |= CIFSSEC_MAY_LANMAN; - break; -#endif - case Opt_sec_none: - vol->nullauth = 1; - break; - default: - cERROR(1, "bad security option: %s", value); - return 1; - } - - return 0; -} - -static int -cifs_parse_mount_options(const char *mountdata, const char *devname, - struct smb_vol *vol) -{ - char *data, *end; - char *mountdata_copy = NULL, *options; - unsigned int temp_len, i, j; - char separator[2]; - short int override_uid = -1; - short int override_gid = -1; - bool uid_specified = false; - bool gid_specified = false; - bool sloppy = false; - char *invalid = NULL; - char *nodename = utsname()->nodename; - char *string = NULL; - char *tmp_end, *value; - char delim; - - separator[0] = ','; - separator[1] = 0; - delim = separator[0]; - - /* - * does not have to be perfect mapping since field is - * informational, only used for servers that do not support - * port 445 and it can be overridden at mount time - */ - memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); - for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) - vol->source_rfc1001_name[i] = toupper(nodename[i]); - - vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; - /* null target name indicates to use *SMBSERVR default called name - if we end up sending RFC1001 session initialize */ - vol->target_rfc1001_name[0] = 0; - vol->cred_uid = current_uid(); - vol->linux_uid = current_uid(); - vol->linux_gid = current_gid(); - - /* default to only allowing write access to owner of the mount */ - vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; - - /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ - /* default is always to request posix paths. */ - vol->posix_paths = 1; - /* default to using server inode numbers where available */ - vol->server_ino = 1; - - vol->actimeo = CIFS_DEF_ACTIMEO; - - if (!mountdata) - goto cifs_parse_mount_err; - - mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); - if (!mountdata_copy) - goto cifs_parse_mount_err; - - options = mountdata_copy; - end = options + strlen(options); - - if (strncmp(options, "sep=", 4) == 0) { - if (options[4] != 0) { - separator[0] = options[4]; - options += 5; - } else { - cFYI(1, "Null separator not allowed"); - } - } - vol->backupuid_specified = false; /* no backup intent for a user */ - vol->backupgid_specified = false; /* no backup intent for a group */ - - while ((data = strsep(&options, separator)) != NULL) { - substring_t args[MAX_OPT_ARGS]; - unsigned long option; - int token; - - if (!*data) - continue; - - token = match_token(data, cifs_mount_option_tokens, args); - - switch (token) { - - /* Ingnore the following */ - case Opt_ignore: - break; - - /* Boolean values */ - case Opt_user_xattr: - vol->no_xattr = 0; - break; - case Opt_nouser_xattr: - vol->no_xattr = 1; - break; - case Opt_forceuid: - override_uid = 1; - break; - case Opt_noforceuid: - override_uid = 0; - break; - case Opt_noblocksend: - vol->noblocksnd = 1; - break; - case Opt_noautotune: - vol->noautotune = 1; - break; - case Opt_hard: - vol->retry = 1; - break; - case Opt_soft: - vol->retry = 0; - break; - case Opt_perm: - vol->noperm = 0; - break; - case Opt_noperm: - vol->noperm = 1; - break; - case Opt_mapchars: - vol->remap = 1; - break; - case Opt_nomapchars: - vol->remap = 0; - break; - case Opt_sfu: - vol->sfu_emul = 1; - break; - case Opt_nosfu: - vol->sfu_emul = 0; - break; - case Opt_nodfs: - vol->nodfs = 1; - break; - case Opt_posixpaths: - vol->posix_paths = 1; - break; - case Opt_noposixpaths: - vol->posix_paths = 0; - break; - case Opt_nounix: - vol->no_linux_ext = 1; - break; - case Opt_nocase: - vol->nocase = 1; - break; - case Opt_brl: - vol->nobrl = 0; - break; - case Opt_nobrl: - vol->nobrl = 1; - /* - * turn off mandatory locking in mode - * if remote locking is turned off since the - * local vfs will do advisory - */ - if (vol->file_mode == - (S_IALLUGO & ~(S_ISUID | S_IXGRP))) - vol->file_mode = S_IALLUGO; - break; - case Opt_forcemandatorylock: - vol->mand_lock = 1; - break; - case Opt_setuids: - vol->setuids = 1; - break; - case Opt_nosetuids: - vol->setuids = 0; - break; - case Opt_dynperm: - vol->dynperm = true; - break; - case Opt_nodynperm: - vol->dynperm = false; - break; - case Opt_nohard: - vol->retry = 0; - break; - case Opt_nosoft: - vol->retry = 1; - break; - case Opt_nointr: - vol->intr = 0; - break; - case Opt_intr: - vol->intr = 1; - break; - case Opt_nostrictsync: - vol->nostrictsync = 1; - break; - case Opt_strictsync: - vol->nostrictsync = 0; - break; - case Opt_serverino: - vol->server_ino = 1; - break; - case Opt_noserverino: - vol->server_ino = 0; - break; - case Opt_rwpidforward: - vol->rwpidforward = 1; - break; - case Opt_cifsacl: - vol->cifs_acl = 1; - break; - case Opt_nocifsacl: - vol->cifs_acl = 0; - break; - case Opt_acl: - vol->no_psx_acl = 0; - break; - case Opt_noacl: - vol->no_psx_acl = 1; - break; - case Opt_locallease: - vol->local_lease = 1; - break; - case Opt_sign: - vol->secFlg |= CIFSSEC_MUST_SIGN; - break; - case Opt_seal: - /* we do not do the following in secFlags because seal - * is a per tree connection (mount) not a per socket - * or per-smb connection option in the protocol - * vol->secFlg |= CIFSSEC_MUST_SEAL; - */ - vol->seal = 1; - break; - case Opt_direct: - vol->direct_io = 1; - break; - case Opt_strictcache: - vol->strict_io = 1; - break; - case Opt_noac: - printk(KERN_WARNING "CIFS: Mount option noac not " - "supported. Instead set " - "/proc/fs/cifs/LookupCacheEnabled to 0\n"); - break; - case Opt_fsc: -#ifndef CONFIG_CIFS_FSCACHE - cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " - "kernel config option set"); - goto cifs_parse_mount_err; -#endif - vol->fsc = true; - break; - case Opt_mfsymlinks: - vol->mfsymlinks = true; - break; - case Opt_multiuser: - vol->multiuser = true; - break; - case Opt_sloppy: - sloppy = true; - break; - - /* Numeric Values */ - case Opt_backupuid: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid backupuid value", - __func__); - goto cifs_parse_mount_err; - } - vol->backupuid = option; - vol->backupuid_specified = true; - break; - case Opt_backupgid: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid backupgid value", - __func__); - goto cifs_parse_mount_err; - } - vol->backupgid = option; - vol->backupgid_specified = true; - break; - case Opt_uid: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid uid value", - __func__); - goto cifs_parse_mount_err; - } - vol->linux_uid = option; - uid_specified = true; - break; - case Opt_cruid: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid cruid value", - __func__); - goto cifs_parse_mount_err; - } - vol->cred_uid = option; - break; - case Opt_gid: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid gid value", - __func__); - goto cifs_parse_mount_err; - } - vol->linux_gid = option; - gid_specified = true; - break; - case Opt_file_mode: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid file_mode value", - __func__); - goto cifs_parse_mount_err; - } - vol->file_mode = option; - break; - case Opt_dirmode: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid dir_mode value", - __func__); - goto cifs_parse_mount_err; - } - vol->dir_mode = option; - break; - case Opt_port: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid port value", - __func__); - goto cifs_parse_mount_err; - } - vol->port = option; - break; - case Opt_rsize: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid rsize value", - __func__); - goto cifs_parse_mount_err; - } - vol->rsize = option; - break; - case Opt_wsize: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid wsize value", - __func__); - goto cifs_parse_mount_err; - } - vol->wsize = option; - break; - case Opt_actimeo: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid actimeo value", - __func__); - goto cifs_parse_mount_err; - } - vol->actimeo = HZ * option; - if (vol->actimeo > CIFS_MAX_ACTIMEO) { - cERROR(1, "CIFS: attribute cache" - "timeout too large"); - goto cifs_parse_mount_err; - } - break; - - /* String Arguments */ - - case Opt_blank_user: - /* null user, ie. anonymous authentication */ - vol->nullauth = 1; - vol->username = NULL; - break; - case Opt_user: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - if (strnlen(string, MAX_USERNAME_SIZE) > - MAX_USERNAME_SIZE) { - printk(KERN_WARNING "CIFS: username too long\n"); - goto cifs_parse_mount_err; - } - vol->username = kstrdup(string, GFP_KERNEL); - if (!vol->username) { - printk(KERN_WARNING "CIFS: no memory " - "for username\n"); - goto cifs_parse_mount_err; - } - break; - case Opt_blank_pass: - vol->password = NULL; - break; - case Opt_pass: - /* passwords have to be handled differently - * to allow the character used for deliminator - * to be passed within them - */ - - /* Obtain the value string */ - value = strchr(data, '='); - value++; - - /* Set tmp_end to end of the string */ - tmp_end = (char *) value + strlen(value); - - /* Check if following character is the deliminator - * If yes, we have encountered a double deliminator - * reset the NULL character to the deliminator - */ - if (tmp_end < end && tmp_end[1] == delim) { - tmp_end[0] = delim; - - /* Keep iterating until we get to a single - * deliminator OR the end - */ - while ((tmp_end = strchr(tmp_end, delim)) - != NULL && (tmp_end[1] == delim)) { - tmp_end = (char *) &tmp_end[2]; - } - - /* Reset var options to point to next element */ - if (tmp_end) { - tmp_end[0] = '\0'; - options = (char *) &tmp_end[1]; - } else - /* Reached the end of the mount option - * string */ - options = end; - } - - /* Now build new password string */ - temp_len = strlen(value); - vol->password = kzalloc(temp_len+1, GFP_KERNEL); - if (vol->password == NULL) { - printk(KERN_WARNING "CIFS: no memory " - "for password\n"); - goto cifs_parse_mount_err; - } - - for (i = 0, j = 0; i < temp_len; i++, j++) { - vol->password[j] = value[i]; - if ((value[i] == delim) && - value[i+1] == delim) - /* skip the second deliminator */ - i++; - } - vol->password[j] = '\0'; - break; - case Opt_blank_ip: - vol->UNCip = NULL; - break; - case Opt_ip: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - if (strnlen(string, INET6_ADDRSTRLEN) > - INET6_ADDRSTRLEN) { - printk(KERN_WARNING "CIFS: ip address " - "too long\n"); - goto cifs_parse_mount_err; - } - vol->UNCip = kstrdup(string, GFP_KERNEL); - if (!vol->UNCip) { - printk(KERN_WARNING "CIFS: no memory " - "for UNC IP\n"); - goto cifs_parse_mount_err; - } - break; - case Opt_unc: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - temp_len = strnlen(string, 300); - if (temp_len == 300) { - printk(KERN_WARNING "CIFS: UNC name too long\n"); - goto cifs_parse_mount_err; - } - - vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); - if (vol->UNC == NULL) { - printk(KERN_WARNING "CIFS: no memory for UNC\n"); - goto cifs_parse_mount_err; - } - strcpy(vol->UNC, string); - - if (strncmp(string, "//", 2) == 0) { - vol->UNC[0] = '\\'; - vol->UNC[1] = '\\'; - } else if (strncmp(string, "\\\\", 2) != 0) { - printk(KERN_WARNING "CIFS: UNC Path does not " - "begin with // or \\\\\n"); - goto cifs_parse_mount_err; - } - - break; - case Opt_domain: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - if (strnlen(string, 256) == 256) { - printk(KERN_WARNING "CIFS: domain name too" - " long\n"); - goto cifs_parse_mount_err; - } - - vol->domainname = kstrdup(string, GFP_KERNEL); - if (!vol->domainname) { - printk(KERN_WARNING "CIFS: no memory " - "for domainname\n"); - goto cifs_parse_mount_err; - } - cFYI(1, "Domain name set"); - break; - case Opt_srcaddr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - if (!cifs_convert_address( - (struct sockaddr *)&vol->srcaddr, - string, strlen(string))) { - printk(KERN_WARNING "CIFS: Could not parse" - " srcaddr: %s\n", string); - goto cifs_parse_mount_err; - } - break; - case Opt_prefixpath: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - temp_len = strnlen(string, 1024); - if (string[0] != '/') - temp_len++; /* missing leading slash */ - if (temp_len > 1024) { - printk(KERN_WARNING "CIFS: prefix too long\n"); - goto cifs_parse_mount_err; - } - - vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); - if (vol->prepath == NULL) { - printk(KERN_WARNING "CIFS: no memory " - "for path prefix\n"); - goto cifs_parse_mount_err; - } - - if (string[0] != '/') { - vol->prepath[0] = '/'; - strcpy(vol->prepath+1, string); - } else - strcpy(vol->prepath, string); - - break; - case Opt_iocharset: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - if (strnlen(string, 1024) >= 65) { - printk(KERN_WARNING "CIFS: iocharset name " - "too long.\n"); - goto cifs_parse_mount_err; - } - - if (strnicmp(string, "default", 7) != 0) { - vol->iocharset = kstrdup(string, - GFP_KERNEL); - if (!vol->iocharset) { - printk(KERN_WARNING "CIFS: no memory" - "for charset\n"); - goto cifs_parse_mount_err; - } - } - /* if iocharset not set then load_nls_default - * is used by caller - */ - cFYI(1, "iocharset set to %s", string); - break; - case Opt_sockopt: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - if (strnicmp(string, "TCP_NODELAY", 11) == 0) - vol->sockopt_tcp_nodelay = 1; - break; - case Opt_netbiosname: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - memset(vol->source_rfc1001_name, 0x20, - RFC1001_NAME_LEN); - /* - * FIXME: are there cases in which a comma can - * be valid in workstation netbios name (and - * need special handling)? - */ - for (i = 0; i < RFC1001_NAME_LEN; i++) { - /* don't ucase netbiosname for user */ - if (string[i] == 0) - break; - vol->source_rfc1001_name[i] = string[i]; - } - /* The string has 16th byte zero still from - * set at top of the function - */ - if (i == RFC1001_NAME_LEN && string[i] != 0) - printk(KERN_WARNING "CIFS: netbiosname" - " longer than 15 truncated.\n"); - - break; - case Opt_servern: - /* servernetbiosname specified override *SMBSERVER */ - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - /* last byte, type, is 0x20 for servr type */ - memset(vol->target_rfc1001_name, 0x20, - RFC1001_NAME_LEN_WITH_NULL); - - /* BB are there cases in which a comma can be - valid in this workstation netbios name - (and need special handling)? */ - - /* user or mount helper must uppercase the - netbios name */ - for (i = 0; i < 15; i++) { - if (string[i] == 0) - break; - vol->target_rfc1001_name[i] = string[i]; - } - /* The string has 16th byte zero still from - set at top of the function */ - if (i == RFC1001_NAME_LEN && string[i] != 0) - printk(KERN_WARNING "CIFS: server net" - "biosname longer than 15 truncated.\n"); - break; - case Opt_ver: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - if (strnicmp(string, "cifs", 4) == 0 || - strnicmp(string, "1", 1) == 0) { - /* This is the default */ - break; - } - /* For all other value, error */ - printk(KERN_WARNING "CIFS: Invalid version" - " specified\n"); - goto cifs_parse_mount_err; - case Opt_sec: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - if (cifs_parse_security_flavors(string, vol) != 0) - goto cifs_parse_mount_err; - break; - default: - /* - * An option we don't recognize. Save it off for later - * if we haven't already found one - */ - if (!invalid) - invalid = data; - break; - } - /* Free up any allocated string */ - kfree(string); - string = NULL; - } - - if (!sloppy && invalid) { - printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); - goto cifs_parse_mount_err; - } - -#ifndef CONFIG_KEYS - /* Muliuser mounts require CONFIG_KEYS support */ - if (vol->multiuser) { - cERROR(1, "Multiuser mounts require kernels with " - "CONFIG_KEYS enabled."); - goto cifs_parse_mount_err; - } -#endif - - if (vol->UNCip == NULL) - vol->UNCip = &vol->UNC[2]; - - if (uid_specified) - vol->override_uid = override_uid; - else if (override_uid == 1) - printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " - "specified with no uid= option.\n"); - - if (gid_specified) - vol->override_gid = override_gid; - else if (override_gid == 1) - printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " - "specified with no gid= option.\n"); - - kfree(mountdata_copy); - return 0; - -out_nomem: - printk(KERN_WARNING "Could not allocate temporary buffer\n"); -cifs_parse_mount_err: - kfree(string); - kfree(mountdata_copy); - return 1; -} - -/** Returns true if srcaddr isn't specified and rhs isn't - * specified, or if srcaddr is specified and - * matches the IP address of the rhs argument. - */ -static bool -srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) -{ - switch (srcaddr->sa_family) { - case AF_UNSPEC: - return (rhs->sa_family == AF_UNSPEC); - case AF_INET: { - struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; - struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; - return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); - } - case AF_INET6: { - struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; - struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; - return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); - } - default: - WARN_ON(1); - return false; /* don't expect to be here */ - } -} - -/* - * If no port is specified in addr structure, we try to match with 445 port - * and if it fails - with 139 ports. It should be called only if address - * families of server and addr are equal. - */ -static bool -match_port(struct TCP_Server_Info *server, struct sockaddr *addr) -{ - __be16 port, *sport; - - switch (addr->sa_family) { - case AF_INET: - sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; - port = ((struct sockaddr_in *) addr)->sin_port; - break; - case AF_INET6: - sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; - port = ((struct sockaddr_in6 *) addr)->sin6_port; - break; - default: - WARN_ON(1); - return false; - } - - if (!port) { - port = htons(CIFS_PORT); - if (port == *sport) - return true; - - port = htons(RFC1001_PORT); - } - - return port == *sport; -} - -static bool -match_address(struct TCP_Server_Info *server, struct sockaddr *addr, - struct sockaddr *srcaddr) -{ - switch (addr->sa_family) { - case AF_INET: { - struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; - struct sockaddr_in *srv_addr4 = - (struct sockaddr_in *)&server->dstaddr; - - if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) - return false; - break; - } - case AF_INET6: { - struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; - struct sockaddr_in6 *srv_addr6 = - (struct sockaddr_in6 *)&server->dstaddr; - - if (!ipv6_addr_equal(&addr6->sin6_addr, - &srv_addr6->sin6_addr)) - return false; - if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) - return false; - break; - } - default: - WARN_ON(1); - return false; /* don't expect to be here */ - } - - if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) - return false; - - return true; -} - -static bool -match_security(struct TCP_Server_Info *server, struct smb_vol *vol) -{ - unsigned int secFlags; - - if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) - secFlags = vol->secFlg; - else - secFlags = global_secflags | vol->secFlg; - - switch (server->secType) { - case LANMAN: - if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) - return false; - break; - case NTLMv2: - if (!(secFlags & CIFSSEC_MAY_NTLMV2)) - return false; - break; - case NTLM: - if (!(secFlags & CIFSSEC_MAY_NTLM)) - return false; - break; - case Kerberos: - if (!(secFlags & CIFSSEC_MAY_KRB5)) - return false; - break; - case RawNTLMSSP: - if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) - return false; - break; - default: - /* shouldn't happen */ - return false; - } - - /* now check if signing mode is acceptable */ - if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && - (server->sec_mode & SECMODE_SIGN_REQUIRED)) - return false; - else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && - (server->sec_mode & - (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) - return false; - - return true; -} - -static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, - struct smb_vol *vol) -{ - if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) - return 0; - - if (!match_address(server, addr, - (struct sockaddr *)&vol->srcaddr)) - return 0; - - if (!match_port(server, addr)) - return 0; - - if (!match_security(server, vol)) - return 0; - - return 1; -} - -static struct TCP_Server_Info * -cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) -{ - struct TCP_Server_Info *server; - - spin_lock(&cifs_tcp_ses_lock); - list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { - if (!match_server(server, addr, vol)) - continue; - - ++server->srv_count; - spin_unlock(&cifs_tcp_ses_lock); - cFYI(1, "Existing tcp session with server found"); - return server; - } - spin_unlock(&cifs_tcp_ses_lock); - return NULL; -} - -static void -cifs_put_tcp_session(struct TCP_Server_Info *server) -{ - struct task_struct *task; - - spin_lock(&cifs_tcp_ses_lock); - if (--server->srv_count > 0) { - spin_unlock(&cifs_tcp_ses_lock); - return; - } - - put_net(cifs_net_ns(server)); - - list_del_init(&server->tcp_ses_list); - spin_unlock(&cifs_tcp_ses_lock); - - cancel_delayed_work_sync(&server->echo); - - spin_lock(&GlobalMid_Lock); - server->tcpStatus = CifsExiting; - spin_unlock(&GlobalMid_Lock); - - cifs_crypto_shash_release(server); - cifs_fscache_release_client_cookie(server); - - kfree(server->session_key.response); - server->session_key.response = NULL; - server->session_key.len = 0; - - task = xchg(&server->tsk, NULL); - if (task) - force_sig(SIGKILL, task); -} - -static struct TCP_Server_Info * -cifs_get_tcp_session(struct smb_vol *volume_info) -{ - struct TCP_Server_Info *tcp_ses = NULL; - struct sockaddr_storage addr; - struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; - struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; - int rc; - - memset(&addr, 0, sizeof(struct sockaddr_storage)); - - cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); - - if (volume_info->UNCip && volume_info->UNC) { - rc = cifs_fill_sockaddr((struct sockaddr *)&addr, - volume_info->UNCip, - strlen(volume_info->UNCip), - volume_info->port); - if (!rc) { - /* we failed translating address */ - rc = -EINVAL; - goto out_err; - } - } else if (volume_info->UNCip) { - /* BB using ip addr as tcp_ses name to connect to the - DFS root below */ - cERROR(1, "Connecting to DFS root not implemented yet"); - rc = -EINVAL; - goto out_err; - } else /* which tcp_sess DFS root would we conect to */ { - cERROR(1, "CIFS mount error: No UNC path (e.g. -o " - "unc=//192.168.1.100/public) specified"); - rc = -EINVAL; - goto out_err; - } - - /* see if we already have a matching tcp_ses */ - tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); - if (tcp_ses) - return tcp_ses; - - tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); - if (!tcp_ses) { - rc = -ENOMEM; - goto out_err; - } - - rc = cifs_crypto_shash_allocate(tcp_ses); - if (rc) { - cERROR(1, "could not setup hash structures rc %d", rc); - goto out_err; - } - - cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); - tcp_ses->hostname = extract_hostname(volume_info->UNC); - if (IS_ERR(tcp_ses->hostname)) { - rc = PTR_ERR(tcp_ses->hostname); - goto out_err_crypto_release; - } - - tcp_ses->noblocksnd = volume_info->noblocksnd; - tcp_ses->noautotune = volume_info->noautotune; - tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; - tcp_ses->in_flight = 0; - tcp_ses->credits = 1; - init_waitqueue_head(&tcp_ses->response_q); - init_waitqueue_head(&tcp_ses->request_q); - INIT_LIST_HEAD(&tcp_ses->pending_mid_q); - mutex_init(&tcp_ses->srv_mutex); - memcpy(tcp_ses->workstation_RFC1001_name, - volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); - memcpy(tcp_ses->server_RFC1001_name, - volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); - tcp_ses->session_estab = false; - tcp_ses->sequence_number = 0; - tcp_ses->lstrp = jiffies; - spin_lock_init(&tcp_ses->req_lock); - INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); - INIT_LIST_HEAD(&tcp_ses->smb_ses_list); - INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); - - /* - * at this point we are the only ones with the pointer - * to the struct since the kernel thread not created yet - * no need to spinlock this init of tcpStatus or srv_count - */ - tcp_ses->tcpStatus = CifsNew; - memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, - sizeof(tcp_ses->srcaddr)); - ++tcp_ses->srv_count; - - if (addr.ss_family == AF_INET6) { - cFYI(1, "attempting ipv6 connect"); - /* BB should we allow ipv6 on port 139? */ - /* other OS never observed in Wild doing 139 with v6 */ - memcpy(&tcp_ses->dstaddr, sin_server6, - sizeof(struct sockaddr_in6)); - } else - memcpy(&tcp_ses->dstaddr, sin_server, - sizeof(struct sockaddr_in)); - - rc = ip_connect(tcp_ses); - if (rc < 0) { - cERROR(1, "Error connecting to socket. Aborting operation"); - goto out_err_crypto_release; - } - - /* - * since we're in a cifs function already, we know that - * this will succeed. No need for try_module_get(). - */ - __module_get(THIS_MODULE); - tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, - tcp_ses, "cifsd"); - if (IS_ERR(tcp_ses->tsk)) { - rc = PTR_ERR(tcp_ses->tsk); - cERROR(1, "error %d create cifsd thread", rc); - module_put(THIS_MODULE); - goto out_err_crypto_release; - } - tcp_ses->tcpStatus = CifsNeedNegotiate; - - /* thread spawned, put it on the list */ - spin_lock(&cifs_tcp_ses_lock); - list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); - spin_unlock(&cifs_tcp_ses_lock); - - cifs_fscache_get_client_cookie(tcp_ses); - - /* queue echo request delayed work */ - queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); - - return tcp_ses; - -out_err_crypto_release: - cifs_crypto_shash_release(tcp_ses); - - put_net(cifs_net_ns(tcp_ses)); - -out_err: - if (tcp_ses) { - if (!IS_ERR(tcp_ses->hostname)) - kfree(tcp_ses->hostname); - if (tcp_ses->ssocket) - sock_release(tcp_ses->ssocket); - kfree(tcp_ses); - } - return ERR_PTR(rc); -} - -static int match_session(struct cifs_ses *ses, struct smb_vol *vol) -{ - switch (ses->server->secType) { - case Kerberos: - if (vol->cred_uid != ses->cred_uid) - return 0; - break; - default: - /* NULL username means anonymous session */ - if (ses->user_name == NULL) { - if (!vol->nullauth) - return 0; - break; - } - - /* anything else takes username/password */ - if (strncmp(ses->user_name, - vol->username ? vol->username : "", - MAX_USERNAME_SIZE)) - return 0; - if (strlen(vol->username) != 0 && - ses->password != NULL && - strncmp(ses->password, - vol->password ? vol->password : "", - MAX_PASSWORD_SIZE)) - return 0; - } - return 1; -} - -static struct cifs_ses * -cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) -{ - struct cifs_ses *ses; - - spin_lock(&cifs_tcp_ses_lock); - list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { - if (!match_session(ses, vol)) - continue; - ++ses->ses_count; - spin_unlock(&cifs_tcp_ses_lock); - return ses; - } - spin_unlock(&cifs_tcp_ses_lock); - return NULL; -} - -static void -cifs_put_smb_ses(struct cifs_ses *ses) -{ - int xid; - struct TCP_Server_Info *server = ses->server; - - cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); - spin_lock(&cifs_tcp_ses_lock); - if (--ses->ses_count > 0) { - spin_unlock(&cifs_tcp_ses_lock); - return; - } - - list_del_init(&ses->smb_ses_list); - spin_unlock(&cifs_tcp_ses_lock); - - if (ses->status == CifsGood) { - xid = GetXid(); - CIFSSMBLogoff(xid, ses); - _FreeXid(xid); - } - sesInfoFree(ses); - cifs_put_tcp_session(server); -} - -#ifdef CONFIG_KEYS - -/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ -#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) - -/* Populate username and pw fields from keyring if possible */ -static int -cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) -{ - int rc = 0; - char *desc, *delim, *payload; - ssize_t len; - struct key *key; - struct TCP_Server_Info *server = ses->server; - struct sockaddr_in *sa; - struct sockaddr_in6 *sa6; - struct user_key_payload *upayload; - - desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); - if (!desc) - return -ENOMEM; - - /* try to find an address key first */ - switch (server->dstaddr.ss_family) { - case AF_INET: - sa = (struct sockaddr_in *)&server->dstaddr; - sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); - break; - case AF_INET6: - sa6 = (struct sockaddr_in6 *)&server->dstaddr; - sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); - break; - default: - cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); - rc = -EINVAL; - goto out_err; - } - - cFYI(1, "%s: desc=%s", __func__, desc); - key = request_key(&key_type_logon, desc, ""); - if (IS_ERR(key)) { - if (!ses->domainName) { - cFYI(1, "domainName is NULL"); - rc = PTR_ERR(key); - goto out_err; - } - - /* didn't work, try to find a domain key */ - sprintf(desc, "cifs:d:%s", ses->domainName); - cFYI(1, "%s: desc=%s", __func__, desc); - key = request_key(&key_type_logon, desc, ""); - if (IS_ERR(key)) { - rc = PTR_ERR(key); - goto out_err; - } - } - - down_read(&key->sem); - upayload = key->payload.data; - if (IS_ERR_OR_NULL(upayload)) { - rc = upayload ? PTR_ERR(upayload) : -EINVAL; - goto out_key_put; - } - - /* find first : in payload */ - payload = (char *)upayload->data; - delim = strnchr(payload, upayload->datalen, ':'); - cFYI(1, "payload=%s", payload); - if (!delim) { - cFYI(1, "Unable to find ':' in payload (datalen=%d)", - upayload->datalen); - rc = -EINVAL; - goto out_key_put; - } - - len = delim - payload; - if (len > MAX_USERNAME_SIZE || len <= 0) { - cFYI(1, "Bad value from username search (len=%zd)", len); - rc = -EINVAL; - goto out_key_put; - } - - vol->username = kstrndup(payload, len, GFP_KERNEL); - if (!vol->username) { - cFYI(1, "Unable to allocate %zd bytes for username", len); - rc = -ENOMEM; - goto out_key_put; - } - cFYI(1, "%s: username=%s", __func__, vol->username); - - len = key->datalen - (len + 1); - if (len > MAX_PASSWORD_SIZE || len <= 0) { - cFYI(1, "Bad len for password search (len=%zd)", len); - rc = -EINVAL; - kfree(vol->username); - vol->username = NULL; - goto out_key_put; - } - - ++delim; - vol->password = kstrndup(delim, len, GFP_KERNEL); - if (!vol->password) { - cFYI(1, "Unable to allocate %zd bytes for password", len); - rc = -ENOMEM; - kfree(vol->username); - vol->username = NULL; - goto out_key_put; - } - -out_key_put: - up_read(&key->sem); - key_put(key); -out_err: - kfree(desc); - cFYI(1, "%s: returning %d", __func__, rc); - return rc; -} -#else /* ! CONFIG_KEYS */ -static inline int -cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), - struct cifs_ses *ses __attribute__((unused))) -{ - return -ENOSYS; -} -#endif /* CONFIG_KEYS */ - -static bool warned_on_ntlm; /* globals init to false automatically */ - -static struct cifs_ses * -cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) -{ - int rc = -ENOMEM, xid; - struct cifs_ses *ses; - struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; - struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; - - xid = GetXid(); - - ses = cifs_find_smb_ses(server, volume_info); - if (ses) { - cFYI(1, "Existing smb sess found (status=%d)", ses->status); - - mutex_lock(&ses->session_mutex); - rc = cifs_negotiate_protocol(xid, ses); - if (rc) { - mutex_unlock(&ses->session_mutex); - /* problem -- put our ses reference */ - cifs_put_smb_ses(ses); - FreeXid(xid); - return ERR_PTR(rc); - } - if (ses->need_reconnect) { - cFYI(1, "Session needs reconnect"); - rc = cifs_setup_session(xid, ses, - volume_info->local_nls); - if (rc) { - mutex_unlock(&ses->session_mutex); - /* problem -- put our reference */ - cifs_put_smb_ses(ses); - FreeXid(xid); - return ERR_PTR(rc); - } - } - mutex_unlock(&ses->session_mutex); - - /* existing SMB ses has a server reference already */ - cifs_put_tcp_session(server); - FreeXid(xid); - return ses; - } - - cFYI(1, "Existing smb sess not found"); - ses = sesInfoAlloc(); - if (ses == NULL) - goto get_ses_fail; - - /* new SMB session uses our server ref */ - ses->server = server; - if (server->dstaddr.ss_family == AF_INET6) - sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); - else - sprintf(ses->serverName, "%pI4", &addr->sin_addr); - - if (volume_info->username) { - ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); - if (!ses->user_name) - goto get_ses_fail; - } - - /* volume_info->password freed at unmount */ - if (volume_info->password) { - ses->password = kstrdup(volume_info->password, GFP_KERNEL); - if (!ses->password) - goto get_ses_fail; - } - if (volume_info->domainname) { - ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); - if (!ses->domainName) - goto get_ses_fail; - } - ses->cred_uid = volume_info->cred_uid; - ses->linux_uid = volume_info->linux_uid; - - /* ntlmv2 is much stronger than ntlm security, and has been broadly - supported for many years, time to update default security mechanism */ - if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { - warned_on_ntlm = true; - cERROR(1, "default security mechanism requested. The default " - "security mechanism will be upgraded from ntlm to " - "ntlmv2 in kernel release 3.3"); - } - ses->overrideSecFlg = volume_info->secFlg; - - mutex_lock(&ses->session_mutex); - rc = cifs_negotiate_protocol(xid, ses); - if (!rc) - rc = cifs_setup_session(xid, ses, volume_info->local_nls); - mutex_unlock(&ses->session_mutex); - if (rc) - goto get_ses_fail; - - /* success, put it on the list */ - spin_lock(&cifs_tcp_ses_lock); - list_add(&ses->smb_ses_list, &server->smb_ses_list); - spin_unlock(&cifs_tcp_ses_lock); - - FreeXid(xid); - return ses; - -get_ses_fail: - sesInfoFree(ses); - FreeXid(xid); - return ERR_PTR(rc); -} - -static int match_tcon(struct cifs_tcon *tcon, const char *unc) -{ - if (tcon->tidStatus == CifsExiting) - return 0; - if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) - return 0; - return 1; -} - -static struct cifs_tcon * -cifs_find_tcon(struct cifs_ses *ses, const char *unc) -{ - struct list_head *tmp; - struct cifs_tcon *tcon; - - spin_lock(&cifs_tcp_ses_lock); - list_for_each(tmp, &ses->tcon_list) { - tcon = list_entry(tmp, struct cifs_tcon, tcon_list); - if (!match_tcon(tcon, unc)) - continue; - ++tcon->tc_count; - spin_unlock(&cifs_tcp_ses_lock); - return tcon; - } - spin_unlock(&cifs_tcp_ses_lock); - return NULL; -} - -static void -cifs_put_tcon(struct cifs_tcon *tcon) -{ - int xid; - struct cifs_ses *ses = tcon->ses; - - cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); - spin_lock(&cifs_tcp_ses_lock); - if (--tcon->tc_count > 0) { - spin_unlock(&cifs_tcp_ses_lock); - return; - } - - list_del_init(&tcon->tcon_list); - spin_unlock(&cifs_tcp_ses_lock); - - xid = GetXid(); - CIFSSMBTDis(xid, tcon); - _FreeXid(xid); - - cifs_fscache_release_super_cookie(tcon); - tconInfoFree(tcon); - cifs_put_smb_ses(ses); -} - -static struct cifs_tcon * -cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) -{ - int rc, xid; - struct cifs_tcon *tcon; - - tcon = cifs_find_tcon(ses, volume_info->UNC); - if (tcon) { - cFYI(1, "Found match on UNC path"); - /* existing tcon already has a reference */ - cifs_put_smb_ses(ses); - if (tcon->seal != volume_info->seal) - cERROR(1, "transport encryption setting " - "conflicts with existing tid"); - return tcon; - } - - tcon = tconInfoAlloc(); - if (tcon == NULL) { - rc = -ENOMEM; - goto out_fail; - } - - tcon->ses = ses; - if (volume_info->password) { - tcon->password = kstrdup(volume_info->password, GFP_KERNEL); - if (!tcon->password) { - rc = -ENOMEM; - goto out_fail; - } - } - - if (strchr(volume_info->UNC + 3, '\\') == NULL - && strchr(volume_info->UNC + 3, '/') == NULL) { - cERROR(1, "Missing share name"); - rc = -ENODEV; - goto out_fail; - } - - /* BB Do we need to wrap session_mutex around - * this TCon call and Unix SetFS as - * we do on SessSetup and reconnect? */ - xid = GetXid(); - rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); - FreeXid(xid); - cFYI(1, "CIFS Tcon rc = %d", rc); - if (rc) - goto out_fail; - - if (volume_info->nodfs) { - tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; - cFYI(1, "DFS disabled (%d)", tcon->Flags); - } - tcon->seal = volume_info->seal; - /* we can have only one retry value for a connection - to a share so for resources mounted more than once - to the same server share the last value passed in - for the retry flag is used */ - tcon->retry = volume_info->retry; - tcon->nocase = volume_info->nocase; - tcon->local_lease = volume_info->local_lease; - - spin_lock(&cifs_tcp_ses_lock); - list_add(&tcon->tcon_list, &ses->tcon_list); - spin_unlock(&cifs_tcp_ses_lock); - - cifs_fscache_get_super_cookie(tcon); - - return tcon; - -out_fail: - tconInfoFree(tcon); - return ERR_PTR(rc); -} - -void -cifs_put_tlink(struct tcon_link *tlink) -{ - if (!tlink || IS_ERR(tlink)) - return; - - if (!atomic_dec_and_test(&tlink->tl_count) || - test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { - tlink->tl_time = jiffies; - return; - } - - if (!IS_ERR(tlink_tcon(tlink))) - cifs_put_tcon(tlink_tcon(tlink)); - kfree(tlink); - return; -} - -static inline struct tcon_link * -cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) -{ - return cifs_sb->master_tlink; -} - -static int -compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) -{ - struct cifs_sb_info *old = CIFS_SB(sb); - struct cifs_sb_info *new = mnt_data->cifs_sb; - - if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) - return 0; - - if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != - (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) - return 0; - - /* - * We want to share sb only if we don't specify an r/wsize or - * specified r/wsize is greater than or equal to existing one. - */ - if (new->wsize && new->wsize < old->wsize) - return 0; - - if (new->rsize && new->rsize < old->rsize) - return 0; - - if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) - return 0; - - if (old->mnt_file_mode != new->mnt_file_mode || - old->mnt_dir_mode != new->mnt_dir_mode) - return 0; - - if (strcmp(old->local_nls->charset, new->local_nls->charset)) - return 0; - - if (old->actimeo != new->actimeo) - return 0; - - return 1; -} - -int -cifs_match_super(struct super_block *sb, void *data) -{ - struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; - struct smb_vol *volume_info; - struct cifs_sb_info *cifs_sb; - struct TCP_Server_Info *tcp_srv; - struct cifs_ses *ses; - struct cifs_tcon *tcon; - struct tcon_link *tlink; - struct sockaddr_storage addr; - int rc = 0; - - memset(&addr, 0, sizeof(struct sockaddr_storage)); - - spin_lock(&cifs_tcp_ses_lock); - cifs_sb = CIFS_SB(sb); - tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); - if (IS_ERR(tlink)) { - spin_unlock(&cifs_tcp_ses_lock); - return rc; - } - tcon = tlink_tcon(tlink); - ses = tcon->ses; - tcp_srv = ses->server; - - volume_info = mnt_data->vol; - - if (!volume_info->UNCip || !volume_info->UNC) - goto out; - - rc = cifs_fill_sockaddr((struct sockaddr *)&addr, - volume_info->UNCip, - strlen(volume_info->UNCip), - volume_info->port); - if (!rc) - goto out; - - if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || - !match_session(ses, volume_info) || - !match_tcon(tcon, volume_info->UNC)) { - rc = 0; - goto out; - } - - rc = compare_mount_options(sb, mnt_data); -out: - spin_unlock(&cifs_tcp_ses_lock); - cifs_put_tlink(tlink); - return rc; -} - -int -get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, - const struct nls_table *nls_codepage, unsigned int *pnum_referrals, - struct dfs_info3_param **preferrals, int remap) -{ - char *temp_unc; - int rc = 0; - - *pnum_referrals = 0; - *preferrals = NULL; - - if (pSesInfo->ipc_tid == 0) { - temp_unc = kmalloc(2 /* for slashes */ + - strnlen(pSesInfo->serverName, - SERVER_NAME_LEN_WITH_NULL * 2) - + 1 + 4 /* slash IPC$ */ + 2, - GFP_KERNEL); - if (temp_unc == NULL) - return -ENOMEM; - temp_unc[0] = '\\'; - temp_unc[1] = '\\'; - strcpy(temp_unc + 2, pSesInfo->serverName); - strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); - rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); - cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); - kfree(temp_unc); - } - if (rc == 0) - rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, - pnum_referrals, nls_codepage, remap); - /* BB map targetUNCs to dfs_info3 structures, here or - in CIFSGetDFSRefer BB */ - - return rc; -} - -#ifdef CONFIG_DEBUG_LOCK_ALLOC -static struct lock_class_key cifs_key[2]; -static struct lock_class_key cifs_slock_key[2]; - -static inline void -cifs_reclassify_socket4(struct socket *sock) -{ - struct sock *sk = sock->sk; - BUG_ON(sock_owned_by_user(sk)); - sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", - &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); -} - -static inline void -cifs_reclassify_socket6(struct socket *sock) -{ - struct sock *sk = sock->sk; - BUG_ON(sock_owned_by_user(sk)); - sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", - &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); -} -#else -static inline void -cifs_reclassify_socket4(struct socket *sock) -{ -} - -static inline void -cifs_reclassify_socket6(struct socket *sock) -{ -} -#endif - -/* See RFC1001 section 14 on representation of Netbios names */ -static void rfc1002mangle(char *target, char *source, unsigned int length) -{ - unsigned int i, j; - - for (i = 0, j = 0; i < (length); i++) { - /* mask a nibble at a time and encode */ - target[j] = 'A' + (0x0F & (source[i] >> 4)); - target[j+1] = 'A' + (0x0F & source[i]); - j += 2; - } - -} - -static int -bind_socket(struct TCP_Server_Info *server) -{ - int rc = 0; - if (server->srcaddr.ss_family != AF_UNSPEC) { - /* Bind to the specified local IP address */ - struct socket *socket = server->ssocket; - rc = socket->ops->bind(socket, - (struct sockaddr *) &server->srcaddr, - sizeof(server->srcaddr)); - if (rc < 0) { - struct sockaddr_in *saddr4; - struct sockaddr_in6 *saddr6; - saddr4 = (struct sockaddr_in *)&server->srcaddr; - saddr6 = (struct sockaddr_in6 *)&server->srcaddr; - if (saddr6->sin6_family == AF_INET6) - cERROR(1, "cifs: " - "Failed to bind to: %pI6c, error: %d\n", - &saddr6->sin6_addr, rc); - else - cERROR(1, "cifs: " - "Failed to bind to: %pI4, error: %d\n", - &saddr4->sin_addr.s_addr, rc); - } - } - return rc; -} - -static int -ip_rfc1001_connect(struct TCP_Server_Info *server) -{ - int rc = 0; - /* - * some servers require RFC1001 sessinit before sending - * negprot - BB check reconnection in case where second - * sessinit is sent but no second negprot - */ - struct rfc1002_session_packet *ses_init_buf; - struct smb_hdr *smb_buf; - ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), - GFP_KERNEL); - if (ses_init_buf) { - ses_init_buf->trailer.session_req.called_len = 32; - - if (server->server_RFC1001_name && - server->server_RFC1001_name[0] != 0) - rfc1002mangle(ses_init_buf->trailer. - session_req.called_name, - server->server_RFC1001_name, - RFC1001_NAME_LEN_WITH_NULL); - else - rfc1002mangle(ses_init_buf->trailer. - session_req.called_name, - DEFAULT_CIFS_CALLED_NAME, - RFC1001_NAME_LEN_WITH_NULL); - - ses_init_buf->trailer.session_req.calling_len = 32; - - /* - * calling name ends in null (byte 16) from old smb - * convention. - */ - if (server->workstation_RFC1001_name && - server->workstation_RFC1001_name[0] != 0) - rfc1002mangle(ses_init_buf->trailer. - session_req.calling_name, - server->workstation_RFC1001_name, - RFC1001_NAME_LEN_WITH_NULL); - else - rfc1002mangle(ses_init_buf->trailer. - session_req.calling_name, - "LINUX_CIFS_CLNT", - RFC1001_NAME_LEN_WITH_NULL); - - ses_init_buf->trailer.session_req.scope1 = 0; - ses_init_buf->trailer.session_req.scope2 = 0; - smb_buf = (struct smb_hdr *)ses_init_buf; - - /* sizeof RFC1002_SESSION_REQUEST with no scope */ - smb_buf->smb_buf_length = cpu_to_be32(0x81000044); - rc = smb_send(server, smb_buf, 0x44); - kfree(ses_init_buf); - /* - * RFC1001 layer in at least one server - * requires very short break before negprot - * presumably because not expecting negprot - * to follow so fast. This is a simple - * solution that works without - * complicating the code and causes no - * significant slowing down on mount - * for everyone else - */ - usleep_range(1000, 2000); - } - /* - * else the negprot may still work without this - * even though malloc failed - */ - - return rc; -} - -static int -generic_ip_connect(struct TCP_Server_Info *server) -{ - int rc = 0; - __be16 sport; - int slen, sfamily; - struct socket *socket = server->ssocket; - struct sockaddr *saddr; - - saddr = (struct sockaddr *) &server->dstaddr; - - if (server->dstaddr.ss_family == AF_INET6) { - sport = ((struct sockaddr_in6 *) saddr)->sin6_port; - slen = sizeof(struct sockaddr_in6); - sfamily = AF_INET6; - } else { - sport = ((struct sockaddr_in *) saddr)->sin_port; - slen = sizeof(struct sockaddr_in); - sfamily = AF_INET; - } - - if (socket == NULL) { - rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, - IPPROTO_TCP, &socket, 1); - if (rc < 0) { - cERROR(1, "Error %d creating socket", rc); - server->ssocket = NULL; - return rc; - } - - /* BB other socket options to set KEEPALIVE, NODELAY? */ - cFYI(1, "Socket created"); - server->ssocket = socket; - socket->sk->sk_allocation = GFP_NOFS; - if (sfamily == AF_INET6) - cifs_reclassify_socket6(socket); - else - cifs_reclassify_socket4(socket); - } - - rc = bind_socket(server); - if (rc < 0) - return rc; - - /* - * Eventually check for other socket options to change from - * the default. sock_setsockopt not used because it expects - * user space buffer - */ - socket->sk->sk_rcvtimeo = 7 * HZ; - socket->sk->sk_sndtimeo = 5 * HZ; - - /* make the bufsizes depend on wsize/rsize and max requests */ - if (server->noautotune) { - if (socket->sk->sk_sndbuf < (200 * 1024)) - socket->sk->sk_sndbuf = 200 * 1024; - if (socket->sk->sk_rcvbuf < (140 * 1024)) - socket->sk->sk_rcvbuf = 140 * 1024; - } - - if (server->tcp_nodelay) { - int val = 1; - rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, - (char *)&val, sizeof(val)); - if (rc) - cFYI(1, "set TCP_NODELAY socket option error %d", rc); - } - - cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", - socket->sk->sk_sndbuf, - socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); - - rc = socket->ops->connect(socket, saddr, slen, 0); - if (rc < 0) { - cFYI(1, "Error %d connecting to server", rc); - sock_release(socket); - server->ssocket = NULL; - return rc; - } - - if (sport == htons(RFC1001_PORT)) - rc = ip_rfc1001_connect(server); - - return rc; -} - -static int -ip_connect(struct TCP_Server_Info *server) -{ - __be16 *sport; - struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; - struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; - - if (server->dstaddr.ss_family == AF_INET6) - sport = &addr6->sin6_port; - else - sport = &addr->sin_port; - - if (*sport == 0) { - int rc; - - /* try with 445 port at first */ - *sport = htons(CIFS_PORT); - - rc = generic_ip_connect(server); - if (rc >= 0) - return rc; - - /* if it failed, try with 139 port */ - *sport = htons(RFC1001_PORT); - } - - return generic_ip_connect(server); -} - -void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, - struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) -{ - /* if we are reconnecting then should we check to see if - * any requested capabilities changed locally e.g. via - * remount but we can not do much about it here - * if they have (even if we could detect it by the following) - * Perhaps we could add a backpointer to array of sb from tcon - * or if we change to make all sb to same share the same - * sb as NFS - then we only have one backpointer to sb. - * What if we wanted to mount the server share twice once with - * and once without posixacls or posix paths? */ - __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); - - if (vol_info && vol_info->no_linux_ext) { - tcon->fsUnixInfo.Capability = 0; - tcon->unix_ext = 0; /* Unix Extensions disabled */ - cFYI(1, "Linux protocol extensions disabled"); - return; - } else if (vol_info) - tcon->unix_ext = 1; /* Unix Extensions supported */ - - if (tcon->unix_ext == 0) { - cFYI(1, "Unix extensions disabled so not set on reconnect"); - return; - } - - if (!CIFSSMBQFSUnixInfo(xid, tcon)) { - __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); - cFYI(1, "unix caps which server supports %lld", cap); - /* check for reconnect case in which we do not - want to change the mount behavior if we can avoid it */ - if (vol_info == NULL) { - /* turn off POSIX ACL and PATHNAMES if not set - originally at mount time */ - if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) - cap &= ~CIFS_UNIX_POSIX_ACL_CAP; - if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { - if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) - cERROR(1, "POSIXPATH support change"); - cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; - } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { - cERROR(1, "possible reconnect error"); - cERROR(1, "server disabled POSIX path support"); - } - } - - if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) - cERROR(1, "per-share encryption not supported yet"); - - cap &= CIFS_UNIX_CAP_MASK; - if (vol_info && vol_info->no_psx_acl) - cap &= ~CIFS_UNIX_POSIX_ACL_CAP; - else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { - cFYI(1, "negotiated posix acl support"); - if (cifs_sb) - cifs_sb->mnt_cifs_flags |= - CIFS_MOUNT_POSIXACL; - } - - if (vol_info && vol_info->posix_paths == 0) - cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; - else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { - cFYI(1, "negotiate posix pathnames"); - if (cifs_sb) - cifs_sb->mnt_cifs_flags |= - CIFS_MOUNT_POSIX_PATHS; - } - - cFYI(1, "Negotiate caps 0x%x", (int)cap); -#ifdef CONFIG_CIFS_DEBUG2 - if (cap & CIFS_UNIX_FCNTL_CAP) - cFYI(1, "FCNTL cap"); - if (cap & CIFS_UNIX_EXTATTR_CAP) - cFYI(1, "EXTATTR cap"); - if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) - cFYI(1, "POSIX path cap"); - if (cap & CIFS_UNIX_XATTR_CAP) - cFYI(1, "XATTR cap"); - if (cap & CIFS_UNIX_POSIX_ACL_CAP) - cFYI(1, "POSIX ACL cap"); - if (cap & CIFS_UNIX_LARGE_READ_CAP) - cFYI(1, "very large read cap"); - if (cap & CIFS_UNIX_LARGE_WRITE_CAP) - cFYI(1, "very large write cap"); - if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) - cFYI(1, "transport encryption cap"); - if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) - cFYI(1, "mandatory transport encryption cap"); -#endif /* CIFS_DEBUG2 */ - if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { - if (vol_info == NULL) { - cFYI(1, "resetting capabilities failed"); - } else - cERROR(1, "Negotiating Unix capabilities " - "with the server failed. Consider " - "mounting with the Unix Extensions\n" - "disabled, if problems are found, " - "by specifying the nounix mount " - "option."); - - } - } -} - -void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, - struct cifs_sb_info *cifs_sb) -{ - INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); - - spin_lock_init(&cifs_sb->tlink_tree_lock); - cifs_sb->tlink_tree = RB_ROOT; - - /* - * Temporarily set r/wsize for matching superblock. If we end up using - * new sb then client will later negotiate it downward if needed. - */ - cifs_sb->rsize = pvolume_info->rsize; - cifs_sb->wsize = pvolume_info->wsize; - - cifs_sb->mnt_uid = pvolume_info->linux_uid; - cifs_sb->mnt_gid = pvolume_info->linux_gid; - cifs_sb->mnt_file_mode = pvolume_info->file_mode; - cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; - cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", - cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); - - cifs_sb->actimeo = pvolume_info->actimeo; - cifs_sb->local_nls = pvolume_info->local_nls; - - if (pvolume_info->noperm) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; - if (pvolume_info->setuids) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; - if (pvolume_info->server_ino) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; - if (pvolume_info->remap) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; - if (pvolume_info->no_xattr) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; - if (pvolume_info->sfu_emul) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; - if (pvolume_info->nobrl) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; - if (pvolume_info->nostrictsync) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; - if (pvolume_info->mand_lock) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; - if (pvolume_info->rwpidforward) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; - if (pvolume_info->cifs_acl) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; - if (pvolume_info->backupuid_specified) { - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; - cifs_sb->mnt_backupuid = pvolume_info->backupuid; - } - if (pvolume_info->backupgid_specified) { - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; - cifs_sb->mnt_backupgid = pvolume_info->backupgid; - } - if (pvolume_info->override_uid) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; - if (pvolume_info->override_gid) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; - if (pvolume_info->dynperm) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; - if (pvolume_info->fsc) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; - if (pvolume_info->multiuser) - cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | - CIFS_MOUNT_NO_PERM); - if (pvolume_info->strict_io) - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; - if (pvolume_info->direct_io) { - cFYI(1, "mounting share using direct i/o"); - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; - } - if (pvolume_info->mfsymlinks) { - if (pvolume_info->sfu_emul) { - cERROR(1, "mount option mfsymlinks ignored if sfu " - "mount option is used"); - } else { - cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; - } - } - - if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) - cERROR(1, "mount option dynperm ignored if cifsacl " - "mount option supported"); -} - -/* - * When the server supports very large reads and writes via POSIX extensions, - * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not - * including the RFC1001 length. - * - * Note that this might make for "interesting" allocation problems during - * writeback however as we have to allocate an array of pointers for the - * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. - * - * For reads, there is a similar problem as we need to allocate an array - * of kvecs to handle the receive, though that should only need to be done - * once. - */ -#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) -#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) - -/* - * When the server doesn't allow large posix writes, only allow a rsize/wsize - * of 2^17-1 minus the size of the call header. That allows for a read or - * write up to the maximum size described by RFC1002. - */ -#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) -#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) - -/* - * The default wsize is 1M. find_get_pages seems to return a maximum of 256 - * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill - * a single wsize request with a single call. - */ -#define CIFS_DEFAULT_IOSIZE (1024 * 1024) - -/* - * Windows only supports a max of 60kb reads and 65535 byte writes. Default to - * those values when posix extensions aren't in force. In actuality here, we - * use 65536 to allow for a write that is a multiple of 4k. Most servers seem - * to be ok with the extra byte even though Windows doesn't send writes that - * are that large. - * - * Citation: - * - * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx - */ -#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) -#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) - -static unsigned int -cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) -{ - __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); - struct TCP_Server_Info *server = tcon->ses->server; - unsigned int wsize; - - /* start with specified wsize, or default */ - if (pvolume_info->wsize) - wsize = pvolume_info->wsize; - else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) - wsize = CIFS_DEFAULT_IOSIZE; - else - wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; - - /* can server support 24-bit write sizes? (via UNIX extensions) */ - if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) - wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); - - /* - * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? - * Limit it to max buffer offered by the server, minus the size of the - * WRITEX header, not including the 4 byte RFC1001 length. - */ - if (!(server->capabilities & CAP_LARGE_WRITE_X) || - (!(server->capabilities & CAP_UNIX) && - (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) - wsize = min_t(unsigned int, wsize, - server->maxBuf - sizeof(WRITE_REQ) + 4); - - /* hard limit of CIFS_MAX_WSIZE */ - wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); - - return wsize; -} - -static unsigned int -cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) -{ - __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); - struct TCP_Server_Info *server = tcon->ses->server; - unsigned int rsize, defsize; - - /* - * Set default value... - * - * HACK alert! Ancient servers have very small buffers. Even though - * MS-CIFS indicates that servers are only limited by the client's - * bufsize for reads, testing against win98se shows that it throws - * INVALID_PARAMETER errors if you try to request too large a read. - * OS/2 just sends back short reads. - * - * If the server doesn't advertise CAP_LARGE_READ_X, then assume that - * it can't handle a read request larger than its MaxBufferSize either. - */ - if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) - defsize = CIFS_DEFAULT_IOSIZE; - else if (server->capabilities & CAP_LARGE_READ_X) - defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; - else - defsize = server->maxBuf - sizeof(READ_RSP); - - rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; - - /* - * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to - * the client's MaxBufferSize. - */ - if (!(server->capabilities & CAP_LARGE_READ_X)) - rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); - - /* hard limit of CIFS_MAX_RSIZE */ - rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); - - return rsize; -} - -static int -is_path_accessible(int xid, struct cifs_tcon *tcon, - struct cifs_sb_info *cifs_sb, const char *full_path) -{ - int rc; - FILE_ALL_INFO *pfile_info; - - pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); - if (pfile_info == NULL) - return -ENOMEM; - - rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, - 0 /* not legacy */, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - - if (rc == -EOPNOTSUPP || rc == -EINVAL) - rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - kfree(pfile_info); - return rc; -} - -static void -cleanup_volume_info_contents(struct smb_vol *volume_info) -{ - kfree(volume_info->username); - kzfree(volume_info->password); - if (volume_info->UNCip != volume_info->UNC + 2) - kfree(volume_info->UNCip); - kfree(volume_info->UNC); - kfree(volume_info->domainname); - kfree(volume_info->iocharset); - kfree(volume_info->prepath); -} - -void -cifs_cleanup_volume_info(struct smb_vol *volume_info) -{ - if (!volume_info) - return; - cleanup_volume_info_contents(volume_info); - kfree(volume_info); -} - - -#ifdef CONFIG_CIFS_DFS_UPCALL -/* build_path_to_root returns full path to root when - * we do not have an exiting connection (tcon) */ -static char * -build_unc_path_to_root(const struct smb_vol *vol, - const struct cifs_sb_info *cifs_sb) -{ - char *full_path, *pos; - unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; - unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); - - full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); - if (full_path == NULL) - return ERR_PTR(-ENOMEM); - - strncpy(full_path, vol->UNC, unc_len); - pos = full_path + unc_len; - - if (pplen) { - strncpy(pos, vol->prepath, pplen); - pos += pplen; - } - - *pos = '\0'; /* add trailing null */ - convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); - cFYI(1, "%s: full_path=%s", __func__, full_path); - return full_path; -} - -/* - * Perform a dfs referral query for a share and (optionally) prefix - * - * If a referral is found, cifs_sb->mountdata will be (re-)allocated - * to a string containing updated options for the submount. Otherwise it - * will be left untouched. - * - * Returns the rc from get_dfs_path to the caller, which can be used to - * determine whether there were referrals. - */ -static int -expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, - struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, - int check_prefix) -{ - int rc; - unsigned int num_referrals = 0; - struct dfs_info3_param *referrals = NULL; - char *full_path = NULL, *ref_path = NULL, *mdata = NULL; - - full_path = build_unc_path_to_root(volume_info, cifs_sb); - if (IS_ERR(full_path)) - return PTR_ERR(full_path); - - /* For DFS paths, skip the first '\' of the UNC */ - ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; - - rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, - &num_referrals, &referrals, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - - if (!rc && num_referrals > 0) { - char *fake_devname = NULL; - - mdata = cifs_compose_mount_options(cifs_sb->mountdata, - full_path + 1, referrals, - &fake_devname); - - free_dfs_info_array(referrals, num_referrals); - - if (IS_ERR(mdata)) { - rc = PTR_ERR(mdata); - mdata = NULL; - } else { - cleanup_volume_info_contents(volume_info); - memset(volume_info, '\0', sizeof(*volume_info)); - rc = cifs_setup_volume_info(volume_info, mdata, - fake_devname); - } - kfree(fake_devname); - kfree(cifs_sb->mountdata); - cifs_sb->mountdata = mdata; - } - kfree(full_path); - return rc; -} -#endif - -static int -cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, - const char *devname) -{ - int rc = 0; - - if (cifs_parse_mount_options(mount_data, devname, volume_info)) - return -EINVAL; - - if (volume_info->nullauth) { - cFYI(1, "Anonymous login"); - kfree(volume_info->username); - volume_info->username = NULL; - } else if (volume_info->username) { - /* BB fixme parse for domain name here */ - cFYI(1, "Username: %s", volume_info->username); - } else { - cifserror("No username specified"); - /* In userspace mount helper we can get user name from alternate - locations such as env variables and files on disk */ - return -EINVAL; - } - - /* this is needed for ASCII cp to Unicode converts */ - if (volume_info->iocharset == NULL) { - /* load_nls_default cannot return null */ - volume_info->local_nls = load_nls_default(); - } else { - volume_info->local_nls = load_nls(volume_info->iocharset); - if (volume_info->local_nls == NULL) { - cERROR(1, "CIFS mount error: iocharset %s not found", - volume_info->iocharset); - return -ELIBACC; - } - } - - return rc; -} - -struct smb_vol * -cifs_get_volume_info(char *mount_data, const char *devname) -{ - int rc; - struct smb_vol *volume_info; - - volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); - if (!volume_info) - return ERR_PTR(-ENOMEM); - - rc = cifs_setup_volume_info(volume_info, mount_data, devname); - if (rc) { - cifs_cleanup_volume_info(volume_info); - volume_info = ERR_PTR(rc); - } - - return volume_info; -} - -int -cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) -{ - int rc; - int xid; - struct cifs_ses *pSesInfo; - struct cifs_tcon *tcon; - struct TCP_Server_Info *srvTcp; - char *full_path; - struct tcon_link *tlink; -#ifdef CONFIG_CIFS_DFS_UPCALL - int referral_walks_count = 0; -#endif - - rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); - if (rc) - return rc; - -#ifdef CONFIG_CIFS_DFS_UPCALL -try_mount_again: - /* cleanup activities if we're chasing a referral */ - if (referral_walks_count) { - if (tcon) - cifs_put_tcon(tcon); - else if (pSesInfo) - cifs_put_smb_ses(pSesInfo); - - FreeXid(xid); - } -#endif - rc = 0; - tcon = NULL; - pSesInfo = NULL; - srvTcp = NULL; - full_path = NULL; - tlink = NULL; - - xid = GetXid(); - - /* get a reference to a tcp session */ - srvTcp = cifs_get_tcp_session(volume_info); - if (IS_ERR(srvTcp)) { - rc = PTR_ERR(srvTcp); - bdi_destroy(&cifs_sb->bdi); - goto out; - } - - /* get a reference to a SMB session */ - pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); - if (IS_ERR(pSesInfo)) { - rc = PTR_ERR(pSesInfo); - pSesInfo = NULL; - goto mount_fail_check; - } - - /* search for existing tcon to this server share */ - tcon = cifs_get_tcon(pSesInfo, volume_info); - if (IS_ERR(tcon)) { - rc = PTR_ERR(tcon); - tcon = NULL; - goto remote_path_check; - } - - /* tell server which Unix caps we support */ - if (tcon->ses->capabilities & CAP_UNIX) { - /* reset of caps checks mount to see if unix extensions - disabled for just this mount */ - reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); - if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && - (le64_to_cpu(tcon->fsUnixInfo.Capability) & - CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { - rc = -EACCES; - goto mount_fail_check; - } - } else - tcon->unix_ext = 0; /* server does not support them */ - - /* do not care if following two calls succeed - informational */ - if (!tcon->ipc) { - CIFSSMBQFSDeviceInfo(xid, tcon); - CIFSSMBQFSAttributeInfo(xid, tcon); - } - - cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); - cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); - - /* tune readahead according to rsize */ - cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; - -remote_path_check: -#ifdef CONFIG_CIFS_DFS_UPCALL - /* - * Perform an unconditional check for whether there are DFS - * referrals for this path without prefix, to provide support - * for DFS referrals from w2k8 servers which don't seem to respond - * with PATH_NOT_COVERED to requests that include the prefix. - * Chase the referral if found, otherwise continue normally. - */ - if (referral_walks_count == 0) { - int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, - cifs_sb, false); - if (!refrc) { - referral_walks_count++; - goto try_mount_again; - } - } -#endif - - /* check if a whole path is not remote */ - if (!rc && tcon) { - /* build_path_to_root works only when we have a valid tcon */ - full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); - if (full_path == NULL) { - rc = -ENOMEM; - goto mount_fail_check; - } - rc = is_path_accessible(xid, tcon, cifs_sb, full_path); - if (rc != 0 && rc != -EREMOTE) { - kfree(full_path); - goto mount_fail_check; - } - kfree(full_path); - } - - /* get referral if needed */ - if (rc == -EREMOTE) { -#ifdef CONFIG_CIFS_DFS_UPCALL - if (referral_walks_count > MAX_NESTED_LINKS) { - /* - * BB: when we implement proper loop detection, - * we will remove this check. But now we need it - * to prevent an indefinite loop if 'DFS tree' is - * misconfigured (i.e. has loops). - */ - rc = -ELOOP; - goto mount_fail_check; - } - - rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, - true); - - if (!rc) { - referral_walks_count++; - goto try_mount_again; - } - goto mount_fail_check; -#else /* No DFS support, return error on mount */ - rc = -EOPNOTSUPP; -#endif - } - - if (rc) - goto mount_fail_check; - - /* now, hang the tcon off of the superblock */ - tlink = kzalloc(sizeof *tlink, GFP_KERNEL); - if (tlink == NULL) { - rc = -ENOMEM; - goto mount_fail_check; - } - - tlink->tl_uid = pSesInfo->linux_uid; - tlink->tl_tcon = tcon; - tlink->tl_time = jiffies; - set_bit(TCON_LINK_MASTER, &tlink->tl_flags); - set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); - - cifs_sb->master_tlink = tlink; - spin_lock(&cifs_sb->tlink_tree_lock); - tlink_rb_insert(&cifs_sb->tlink_tree, tlink); - spin_unlock(&cifs_sb->tlink_tree_lock); - - queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, - TLINK_IDLE_EXPIRE); - -mount_fail_check: - /* on error free sesinfo and tcon struct if needed */ - if (rc) { - /* If find_unc succeeded then rc == 0 so we can not end */ - /* up accidentally freeing someone elses tcon struct */ - if (tcon) - cifs_put_tcon(tcon); - else if (pSesInfo) - cifs_put_smb_ses(pSesInfo); - else - cifs_put_tcp_session(srvTcp); - bdi_destroy(&cifs_sb->bdi); - } - -out: - FreeXid(xid); - return rc; -} - -/* - * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon - * pointer may be NULL. - */ -int -CIFSTCon(unsigned int xid, struct cifs_ses *ses, - const char *tree, struct cifs_tcon *tcon, - const struct nls_table *nls_codepage) -{ - struct smb_hdr *smb_buffer; - struct smb_hdr *smb_buffer_response; - TCONX_REQ *pSMB; - TCONX_RSP *pSMBr; - unsigned char *bcc_ptr; - int rc = 0; - int length; - __u16 bytes_left, count; - - if (ses == NULL) - return -EIO; - - smb_buffer = cifs_buf_get(); - if (smb_buffer == NULL) - return -ENOMEM; - - smb_buffer_response = smb_buffer; - - header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, - NULL /*no tid */ , 4 /*wct */ ); - - smb_buffer->Mid = GetNextMid(ses->server); - smb_buffer->Uid = ses->Suid; - pSMB = (TCONX_REQ *) smb_buffer; - pSMBr = (TCONX_RSP *) smb_buffer_response; - - pSMB->AndXCommand = 0xFF; - pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); - bcc_ptr = &pSMB->Password[0]; - if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { - pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ - *bcc_ptr = 0; /* password is null byte */ - bcc_ptr++; /* skip password */ - /* already aligned so no need to do it below */ - } else { - pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); - /* BB FIXME add code to fail this if NTLMv2 or Kerberos - specified as required (when that support is added to - the vfs in the future) as only NTLM or the much - weaker LANMAN (which we do not send by default) is accepted - by Samba (not sure whether other servers allow - NTLMv2 password here) */ -#ifdef CONFIG_CIFS_WEAK_PW_HASH - if ((global_secflags & CIFSSEC_MAY_LANMAN) && - (ses->server->secType == LANMAN)) - calc_lanman_hash(tcon->password, ses->server->cryptkey, - ses->server->sec_mode & - SECMODE_PW_ENCRYPT ? true : false, - bcc_ptr); - else -#endif /* CIFS_WEAK_PW_HASH */ - rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, - bcc_ptr, nls_codepage); - - bcc_ptr += CIFS_AUTH_RESP_SIZE; - if (ses->capabilities & CAP_UNICODE) { - /* must align unicode strings */ - *bcc_ptr = 0; /* null byte password */ - bcc_ptr++; - } - } - - if (ses->server->sec_mode & - (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) - smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; - - if (ses->capabilities & CAP_STATUS32) { - smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; - } - if (ses->capabilities & CAP_DFS) { - smb_buffer->Flags2 |= SMBFLG2_DFS; - } - if (ses->capabilities & CAP_UNICODE) { - smb_buffer->Flags2 |= SMBFLG2_UNICODE; - length = - cifs_strtoUTF16((__le16 *) bcc_ptr, tree, - 6 /* max utf8 char length in bytes */ * - (/* server len*/ + 256 /* share len */), nls_codepage); - bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ - bcc_ptr += 2; /* skip trailing null */ - } else { /* ASCII */ - strcpy(bcc_ptr, tree); - bcc_ptr += strlen(tree) + 1; - } - strcpy(bcc_ptr, "?????"); - bcc_ptr += strlen("?????"); - bcc_ptr += 1; - count = bcc_ptr - &pSMB->Password[0]; - pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( - pSMB->hdr.smb_buf_length) + count); - pSMB->ByteCount = cpu_to_le16(count); - - rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, - 0); - - /* above now done in SendReceive */ - if ((rc == 0) && (tcon != NULL)) { - bool is_unicode; - - tcon->tidStatus = CifsGood; - tcon->need_reconnect = false; - tcon->tid = smb_buffer_response->Tid; - bcc_ptr = pByteArea(smb_buffer_response); - bytes_left = get_bcc(smb_buffer_response); - length = strnlen(bcc_ptr, bytes_left - 2); - if (smb_buffer->Flags2 & SMBFLG2_UNICODE) - is_unicode = true; - else - is_unicode = false; - - - /* skip service field (NB: this field is always ASCII) */ - if (length == 3) { - if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && - (bcc_ptr[2] == 'C')) { - cFYI(1, "IPC connection"); - tcon->ipc = 1; - } - } else if (length == 2) { - if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { - /* the most common case */ - cFYI(1, "disk share connection"); - } - } - bcc_ptr += length + 1; - bytes_left -= (length + 1); - strncpy(tcon->treeName, tree, MAX_TREE_SIZE); - - /* mostly informational -- no need to fail on error here */ - kfree(tcon->nativeFileSystem); - tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, - bytes_left, is_unicode, - nls_codepage); - - cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); - - if ((smb_buffer_response->WordCount == 3) || - (smb_buffer_response->WordCount == 7)) - /* field is in same location */ - tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); - else - tcon->Flags = 0; - cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); - } else if ((rc == 0) && tcon == NULL) { - /* all we need to save for IPC$ connection */ - ses->ipc_tid = smb_buffer_response->Tid; - } - - cifs_buf_release(smb_buffer); - return rc; -} - -void -cifs_umount(struct cifs_sb_info *cifs_sb) -{ - struct rb_root *root = &cifs_sb->tlink_tree; - struct rb_node *node; - struct tcon_link *tlink; - - cancel_delayed_work_sync(&cifs_sb->prune_tlinks); - - spin_lock(&cifs_sb->tlink_tree_lock); - while ((node = rb_first(root))) { - tlink = rb_entry(node, struct tcon_link, tl_rbnode); - cifs_get_tlink(tlink); - clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); - rb_erase(node, root); - - spin_unlock(&cifs_sb->tlink_tree_lock); - cifs_put_tlink(tlink); - spin_lock(&cifs_sb->tlink_tree_lock); - } - spin_unlock(&cifs_sb->tlink_tree_lock); - - bdi_destroy(&cifs_sb->bdi); - kfree(cifs_sb->mountdata); - unload_nls(cifs_sb->local_nls); - kfree(cifs_sb); -} - -int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) -{ - int rc = 0; - struct TCP_Server_Info *server = ses->server; - - /* only send once per connect */ - if (server->maxBuf != 0) - return 0; - - cifs_set_credits(server, 1); - rc = CIFSSMBNegotiate(xid, ses); - if (rc == -EAGAIN) { - /* retry only once on 1st time connection */ - cifs_set_credits(server, 1); - rc = CIFSSMBNegotiate(xid, ses); - if (rc == -EAGAIN) - rc = -EHOSTDOWN; - } - if (rc == 0) { - spin_lock(&GlobalMid_Lock); - if (server->tcpStatus == CifsNeedNegotiate) - server->tcpStatus = CifsGood; - else - rc = -EHOSTDOWN; - spin_unlock(&GlobalMid_Lock); - - } - - return rc; -} - - -int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, - struct nls_table *nls_info) -{ - int rc = 0; - struct TCP_Server_Info *server = ses->server; - - ses->flags = 0; - ses->capabilities = server->capabilities; - if (linuxExtEnabled == 0) - ses->capabilities &= (~CAP_UNIX); - - cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", - server->sec_mode, server->capabilities, server->timeAdj); - - rc = CIFS_SessSetup(xid, ses, nls_info); - if (rc) { - cERROR(1, "Send error in SessSetup = %d", rc); - } else { - mutex_lock(&ses->server->srv_mutex); - if (!server->session_estab) { - server->session_key.response = ses->auth_key.response; - server->session_key.len = ses->auth_key.len; - server->sequence_number = 0x2; - server->session_estab = true; - ses->auth_key.response = NULL; - } - mutex_unlock(&server->srv_mutex); - - cFYI(1, "CIFS Session Established successfully"); - spin_lock(&GlobalMid_Lock); - ses->status = CifsGood; - ses->need_reconnect = false; - spin_unlock(&GlobalMid_Lock); - } - - kfree(ses->auth_key.response); - ses->auth_key.response = NULL; - ses->auth_key.len = 0; - kfree(ses->ntlmssp); - ses->ntlmssp = NULL; - - return rc; -} - -static int -cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) -{ - switch (ses->server->secType) { - case Kerberos: - vol->secFlg = CIFSSEC_MUST_KRB5; - return 0; - case NTLMv2: - vol->secFlg = CIFSSEC_MUST_NTLMV2; - break; - case NTLM: - vol->secFlg = CIFSSEC_MUST_NTLM; - break; - case RawNTLMSSP: - vol->secFlg = CIFSSEC_MUST_NTLMSSP; - break; - case LANMAN: - vol->secFlg = CIFSSEC_MUST_LANMAN; - break; - } - - return cifs_set_cifscreds(vol, ses); -} - -static struct cifs_tcon * -cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) -{ - int rc; - struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); - struct cifs_ses *ses; - struct cifs_tcon *tcon = NULL; - struct smb_vol *vol_info; - - vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); - if (vol_info == NULL) - return ERR_PTR(-ENOMEM); - - vol_info->local_nls = cifs_sb->local_nls; - vol_info->linux_uid = fsuid; - vol_info->cred_uid = fsuid; - vol_info->UNC = master_tcon->treeName; - vol_info->retry = master_tcon->retry; - vol_info->nocase = master_tcon->nocase; - vol_info->local_lease = master_tcon->local_lease; - vol_info->no_linux_ext = !master_tcon->unix_ext; - - rc = cifs_set_vol_auth(vol_info, master_tcon->ses); - if (rc) { - tcon = ERR_PTR(rc); - goto out; - } - - /* get a reference for the same TCP session */ - spin_lock(&cifs_tcp_ses_lock); - ++master_tcon->ses->server->srv_count; - spin_unlock(&cifs_tcp_ses_lock); - - ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); - if (IS_ERR(ses)) { - tcon = (struct cifs_tcon *)ses; - cifs_put_tcp_session(master_tcon->ses->server); - goto out; - } - - tcon = cifs_get_tcon(ses, vol_info); - if (IS_ERR(tcon)) { - cifs_put_smb_ses(ses); - goto out; - } - - if (ses->capabilities & CAP_UNIX) - reset_cifs_unix_caps(0, tcon, NULL, vol_info); -out: - kfree(vol_info->username); - kfree(vol_info->password); - kfree(vol_info); - - return tcon; -} - -struct cifs_tcon * -cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) -{ - return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); -} - -static int -cifs_sb_tcon_pending_wait(void *unused) -{ - schedule(); - return signal_pending(current) ? -ERESTARTSYS : 0; -} - -/* find and return a tlink with given uid */ -static struct tcon_link * -tlink_rb_search(struct rb_root *root, uid_t uid) -{ - struct rb_node *node = root->rb_node; - struct tcon_link *tlink; - - while (node) { - tlink = rb_entry(node, struct tcon_link, tl_rbnode); - - if (tlink->tl_uid > uid) - node = node->rb_left; - else if (tlink->tl_uid < uid) - node = node->rb_right; - else - return tlink; - } - return NULL; -} - -/* insert a tcon_link into the tree */ -static void -tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) -{ - struct rb_node **new = &(root->rb_node), *parent = NULL; - struct tcon_link *tlink; - - while (*new) { - tlink = rb_entry(*new, struct tcon_link, tl_rbnode); - parent = *new; - - if (tlink->tl_uid > new_tlink->tl_uid) - new = &((*new)->rb_left); - else - new = &((*new)->rb_right); - } - - rb_link_node(&new_tlink->tl_rbnode, parent, new); - rb_insert_color(&new_tlink->tl_rbnode, root); -} - -/* - * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the - * current task. - * - * If the superblock doesn't refer to a multiuser mount, then just return - * the master tcon for the mount. - * - * First, search the rbtree for an existing tcon for this fsuid. If one - * exists, then check to see if it's pending construction. If it is then wait - * for construction to complete. Once it's no longer pending, check to see if - * it failed and either return an error or retry construction, depending on - * the timeout. - * - * If one doesn't exist then insert a new tcon_link struct into the tree and - * try to construct a new one. - */ -struct tcon_link * -cifs_sb_tlink(struct cifs_sb_info *cifs_sb) -{ - int ret; - uid_t fsuid = current_fsuid(); - struct tcon_link *tlink, *newtlink; - - if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) - return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); - - spin_lock(&cifs_sb->tlink_tree_lock); - tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); - if (tlink) - cifs_get_tlink(tlink); - spin_unlock(&cifs_sb->tlink_tree_lock); - - if (tlink == NULL) { - newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); - if (newtlink == NULL) - return ERR_PTR(-ENOMEM); - newtlink->tl_uid = fsuid; - newtlink->tl_tcon = ERR_PTR(-EACCES); - set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); - set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); - cifs_get_tlink(newtlink); - - spin_lock(&cifs_sb->tlink_tree_lock); - /* was one inserted after previous search? */ - tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); - if (tlink) { - cifs_get_tlink(tlink); - spin_unlock(&cifs_sb->tlink_tree_lock); - kfree(newtlink); - goto wait_for_construction; - } - tlink = newtlink; - tlink_rb_insert(&cifs_sb->tlink_tree, tlink); - spin_unlock(&cifs_sb->tlink_tree_lock); - } else { -wait_for_construction: - ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, - cifs_sb_tcon_pending_wait, - TASK_INTERRUPTIBLE); - if (ret) { - cifs_put_tlink(tlink); - return ERR_PTR(ret); - } - - /* if it's good, return it */ - if (!IS_ERR(tlink->tl_tcon)) - return tlink; - - /* return error if we tried this already recently */ - if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { - cifs_put_tlink(tlink); - return ERR_PTR(-EACCES); - } - - if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) - goto wait_for_construction; - } - - tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); - clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); - wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); - - if (IS_ERR(tlink->tl_tcon)) { - cifs_put_tlink(tlink); - return ERR_PTR(-EACCES); - } - - return tlink; -} - -/* - * periodic workqueue job that scans tcon_tree for a superblock and closes - * out tcons. - */ -static void -cifs_prune_tlinks(struct work_struct *work) -{ - struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, - prune_tlinks.work); - struct rb_root *root = &cifs_sb->tlink_tree; - struct rb_node *node = rb_first(root); - struct rb_node *tmp; - struct tcon_link *tlink; - - /* - * Because we drop the spinlock in the loop in order to put the tlink - * it's not guarded against removal of links from the tree. The only - * places that remove entries from the tree are this function and - * umounts. Because this function is non-reentrant and is canceled - * before umount can proceed, this is safe. - */ - spin_lock(&cifs_sb->tlink_tree_lock); - node = rb_first(root); - while (node != NULL) { - tmp = node; - node = rb_next(tmp); - tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); - - if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || - atomic_read(&tlink->tl_count) != 0 || - time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) - continue; - - cifs_get_tlink(tlink); - clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); - rb_erase(tmp, root); - - spin_unlock(&cifs_sb->tlink_tree_lock); - cifs_put_tlink(tlink); - spin_lock(&cifs_sb->tlink_tree_lock); - } - spin_unlock(&cifs_sb->tlink_tree_lock); - - queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, - TLINK_IDLE_EXPIRE); -} |