diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfsd/nfs4xdr.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfsd/nfs4xdr.c | 3671 |
1 files changed, 0 insertions, 3671 deletions
diff --git a/ANDROID_3.4.5/fs/nfsd/nfs4xdr.c b/ANDROID_3.4.5/fs/nfsd/nfs4xdr.c deleted file mode 100644 index 74c00bc9..00000000 --- a/ANDROID_3.4.5/fs/nfsd/nfs4xdr.c +++ /dev/null @@ -1,3671 +0,0 @@ -/* - * Server-side XDR for NFSv4 - * - * Copyright (c) 2002 The Regents of the University of Michigan. - * All rights reserved. - * - * Kendrick Smith <kmsmith@umich.edu> - * Andy Adamson <andros@umich.edu> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * TODO: Neil Brown made the following observation: We currently - * initially reserve NFSD_BUFSIZE space on the transmit queue and - * never release any of that until the request is complete. - * It would be good to calculate a new maximum response size while - * decoding the COMPOUND, and call svc_reserve with this number - * at the end of nfs4svc_decode_compoundargs. - */ - -#include <linux/slab.h> -#include <linux/namei.h> -#include <linux/statfs.h> -#include <linux/utsname.h> -#include <linux/pagemap.h> -#include <linux/sunrpc/svcauth_gss.h> - -#include "idmap.h" -#include "acl.h" -#include "xdr4.h" -#include "vfs.h" -#include "state.h" -#include "cache.h" - -#define NFSDDBG_FACILITY NFSDDBG_XDR - -/* - * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing - * directory in order to indicate to the client that a filesystem boundary is present - * We use a fixed fsid for a referral - */ -#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL -#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL - -static __be32 -check_filename(char *str, int len, __be32 err) -{ - int i; - - if (len == 0) - return nfserr_inval; - if (isdotent(str, len)) - return err; - for (i = 0; i < len; i++) - if (str[i] == '/') - return err; - return 0; -} - -#define DECODE_HEAD \ - __be32 *p; \ - __be32 status -#define DECODE_TAIL \ - status = 0; \ -out: \ - return status; \ -xdr_error: \ - dprintk("NFSD: xdr error (%s:%d)\n", \ - __FILE__, __LINE__); \ - status = nfserr_bad_xdr; \ - goto out - -#define READ32(x) (x) = ntohl(*p++) -#define READ64(x) do { \ - (x) = (u64)ntohl(*p++) << 32; \ - (x) |= ntohl(*p++); \ -} while (0) -#define READTIME(x) do { \ - p++; \ - (x) = ntohl(*p++); \ - p++; \ -} while (0) -#define READMEM(x,nbytes) do { \ - x = (char *)p; \ - p += XDR_QUADLEN(nbytes); \ -} while (0) -#define SAVEMEM(x,nbytes) do { \ - if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ - savemem(argp, p, nbytes) : \ - (char *)p)) { \ - dprintk("NFSD: xdr error (%s:%d)\n", \ - __FILE__, __LINE__); \ - goto xdr_error; \ - } \ - p += XDR_QUADLEN(nbytes); \ -} while (0) -#define COPYMEM(x,nbytes) do { \ - memcpy((x), p, nbytes); \ - p += XDR_QUADLEN(nbytes); \ -} while (0) - -/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ -#define READ_BUF(nbytes) do { \ - if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ - p = argp->p; \ - argp->p += XDR_QUADLEN(nbytes); \ - } else if (!(p = read_buf(argp, nbytes))) { \ - dprintk("NFSD: xdr error (%s:%d)\n", \ - __FILE__, __LINE__); \ - goto xdr_error; \ - } \ -} while (0) - -static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) -{ - /* We want more bytes than seem to be available. - * Maybe we need a new page, maybe we have just run out - */ - unsigned int avail = (char *)argp->end - (char *)argp->p; - __be32 *p; - if (avail + argp->pagelen < nbytes) - return NULL; - if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ - return NULL; - /* ok, we can do it with the current plus the next page */ - if (nbytes <= sizeof(argp->tmp)) - p = argp->tmp; - else { - kfree(argp->tmpp); - p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); - if (!p) - return NULL; - - } - /* - * The following memcpy is safe because read_buf is always - * called with nbytes > avail, and the two cases above both - * guarantee p points to at least nbytes bytes. - */ - memcpy(p, argp->p, avail); - /* step to next page */ - argp->p = page_address(argp->pagelist[0]); - argp->pagelist++; - if (argp->pagelen < PAGE_SIZE) { - argp->end = argp->p + (argp->pagelen>>2); - argp->pagelen = 0; - } else { - argp->end = argp->p + (PAGE_SIZE>>2); - argp->pagelen -= PAGE_SIZE; - } - memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); - argp->p += XDR_QUADLEN(nbytes - avail); - return p; -} - -static int zero_clientid(clientid_t *clid) -{ - return (clid->cl_boot == 0) && (clid->cl_id == 0); -} - -static int -defer_free(struct nfsd4_compoundargs *argp, - void (*release)(const void *), void *p) -{ - struct tmpbuf *tb; - - tb = kmalloc(sizeof(*tb), GFP_KERNEL); - if (!tb) - return -ENOMEM; - tb->buf = p; - tb->release = release; - tb->next = argp->to_free; - argp->to_free = tb; - return 0; -} - -static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) -{ - if (p == argp->tmp) { - p = kmemdup(argp->tmp, nbytes, GFP_KERNEL); - if (!p) - return NULL; - } else { - BUG_ON(p != argp->tmpp); - argp->tmpp = NULL; - } - if (defer_free(argp, kfree, p)) { - kfree(p); - return NULL; - } else - return (char *)p; -} - -static __be32 -nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) -{ - u32 bmlen; - DECODE_HEAD; - - bmval[0] = 0; - bmval[1] = 0; - bmval[2] = 0; - - READ_BUF(4); - READ32(bmlen); - if (bmlen > 1000) - goto xdr_error; - - READ_BUF(bmlen << 2); - if (bmlen > 0) - READ32(bmval[0]); - if (bmlen > 1) - READ32(bmval[1]); - if (bmlen > 2) - READ32(bmval[2]); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, - struct iattr *iattr, struct nfs4_acl **acl) -{ - int expected_len, len = 0; - u32 dummy32; - char *buf; - int host_err; - - DECODE_HEAD; - iattr->ia_valid = 0; - if ((status = nfsd4_decode_bitmap(argp, bmval))) - return status; - - READ_BUF(4); - READ32(expected_len); - - if (bmval[0] & FATTR4_WORD0_SIZE) { - READ_BUF(8); - len += 8; - READ64(iattr->ia_size); - iattr->ia_valid |= ATTR_SIZE; - } - if (bmval[0] & FATTR4_WORD0_ACL) { - int nace; - struct nfs4_ace *ace; - - READ_BUF(4); len += 4; - READ32(nace); - - if (nace > NFS4_ACL_MAX) - return nfserr_resource; - - *acl = nfs4_acl_new(nace); - if (*acl == NULL) { - host_err = -ENOMEM; - goto out_nfserr; - } - defer_free(argp, kfree, *acl); - - (*acl)->naces = nace; - for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { - READ_BUF(16); len += 16; - READ32(ace->type); - READ32(ace->flag); - READ32(ace->access_mask); - READ32(dummy32); - READ_BUF(dummy32); - len += XDR_QUADLEN(dummy32) << 2; - READMEM(buf, dummy32); - ace->whotype = nfs4_acl_get_whotype(buf, dummy32); - status = nfs_ok; - if (ace->whotype != NFS4_ACL_WHO_NAMED) - ace->who = 0; - else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) - status = nfsd_map_name_to_gid(argp->rqstp, - buf, dummy32, &ace->who); - else - status = nfsd_map_name_to_uid(argp->rqstp, - buf, dummy32, &ace->who); - if (status) - return status; - } - } else - *acl = NULL; - if (bmval[1] & FATTR4_WORD1_MODE) { - READ_BUF(4); - len += 4; - READ32(iattr->ia_mode); - iattr->ia_mode &= (S_IFMT | S_IALLUGO); - iattr->ia_valid |= ATTR_MODE; - } - if (bmval[1] & FATTR4_WORD1_OWNER) { - READ_BUF(4); - len += 4; - READ32(dummy32); - READ_BUF(dummy32); - len += (XDR_QUADLEN(dummy32) << 2); - READMEM(buf, dummy32); - if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) - return status; - iattr->ia_valid |= ATTR_UID; - } - if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { - READ_BUF(4); - len += 4; - READ32(dummy32); - READ_BUF(dummy32); - len += (XDR_QUADLEN(dummy32) << 2); - READMEM(buf, dummy32); - if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) - return status; - iattr->ia_valid |= ATTR_GID; - } - if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { - READ_BUF(4); - len += 4; - READ32(dummy32); - switch (dummy32) { - case NFS4_SET_TO_CLIENT_TIME: - /* We require the high 32 bits of 'seconds' to be 0, and we ignore - all 32 bits of 'nseconds'. */ - READ_BUF(12); - len += 12; - READ32(dummy32); - if (dummy32) - return nfserr_inval; - READ32(iattr->ia_atime.tv_sec); - READ32(iattr->ia_atime.tv_nsec); - if (iattr->ia_atime.tv_nsec >= (u32)1000000000) - return nfserr_inval; - iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); - break; - case NFS4_SET_TO_SERVER_TIME: - iattr->ia_valid |= ATTR_ATIME; - break; - default: - goto xdr_error; - } - } - if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { - READ_BUF(4); - len += 4; - READ32(dummy32); - switch (dummy32) { - case NFS4_SET_TO_CLIENT_TIME: - /* We require the high 32 bits of 'seconds' to be 0, and we ignore - all 32 bits of 'nseconds'. */ - READ_BUF(12); - len += 12; - READ32(dummy32); - if (dummy32) - return nfserr_inval; - READ32(iattr->ia_mtime.tv_sec); - READ32(iattr->ia_mtime.tv_nsec); - if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) - return nfserr_inval; - iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); - break; - case NFS4_SET_TO_SERVER_TIME: - iattr->ia_valid |= ATTR_MTIME; - break; - default: - goto xdr_error; - } - } - if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 - || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 - || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) - READ_BUF(expected_len - len); - else if (len != expected_len) - goto xdr_error; - - DECODE_TAIL; - -out_nfserr: - status = nfserrno(host_err); - goto out; -} - -static __be32 -nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) -{ - DECODE_HEAD; - - READ_BUF(sizeof(stateid_t)); - READ32(sid->si_generation); - COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(access->ac_req_access); - - DECODE_TAIL; -} - -static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) -{ - DECODE_HEAD; - - READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); - COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); - READ32(bcts->dir); - /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker - * could help us figure out we should be using it. */ - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(close->cl_seqid); - return nfsd4_decode_stateid(argp, &close->cl_stateid); - - DECODE_TAIL; -} - - -static __be32 -nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) -{ - DECODE_HEAD; - - READ_BUF(12); - READ64(commit->co_offset); - READ32(commit->co_count); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(create->cr_type); - switch (create->cr_type) { - case NF4LNK: - READ_BUF(4); - READ32(create->cr_linklen); - READ_BUF(create->cr_linklen); - SAVEMEM(create->cr_linkname, create->cr_linklen); - break; - case NF4BLK: - case NF4CHR: - READ_BUF(8); - READ32(create->cr_specdata1); - READ32(create->cr_specdata2); - break; - case NF4SOCK: - case NF4FIFO: - case NF4DIR: - default: - break; - } - - READ_BUF(4); - READ32(create->cr_namelen); - READ_BUF(create->cr_namelen); - SAVEMEM(create->cr_name, create->cr_namelen); - if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) - return status; - - status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, - &create->cr_acl); - if (status) - goto out; - - DECODE_TAIL; -} - -static inline __be32 -nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) -{ - return nfsd4_decode_stateid(argp, &dr->dr_stateid); -} - -static inline __be32 -nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) -{ - return nfsd4_decode_bitmap(argp, getattr->ga_bmval); -} - -static __be32 -nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(link->li_namelen); - READ_BUF(link->li_namelen); - SAVEMEM(link->li_name, link->li_namelen); - if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) - return status; - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) -{ - DECODE_HEAD; - - /* - * type, reclaim(boolean), offset, length, new_lock_owner(boolean) - */ - READ_BUF(28); - READ32(lock->lk_type); - if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) - goto xdr_error; - READ32(lock->lk_reclaim); - READ64(lock->lk_offset); - READ64(lock->lk_length); - READ32(lock->lk_is_new); - - if (lock->lk_is_new) { - READ_BUF(4); - READ32(lock->lk_new_open_seqid); - status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); - if (status) - return status; - READ_BUF(8 + sizeof(clientid_t)); - READ32(lock->lk_new_lock_seqid); - COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); - READ32(lock->lk_new_owner.len); - READ_BUF(lock->lk_new_owner.len); - READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); - } else { - status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); - if (status) - return status; - READ_BUF(4); - READ32(lock->lk_old_lock_seqid); - } - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) -{ - DECODE_HEAD; - - READ_BUF(32); - READ32(lockt->lt_type); - if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) - goto xdr_error; - READ64(lockt->lt_offset); - READ64(lockt->lt_length); - COPYMEM(&lockt->lt_clientid, 8); - READ32(lockt->lt_owner.len); - READ_BUF(lockt->lt_owner.len); - READMEM(lockt->lt_owner.data, lockt->lt_owner.len); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) -{ - DECODE_HEAD; - - READ_BUF(8); - READ32(locku->lu_type); - if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) - goto xdr_error; - READ32(locku->lu_seqid); - status = nfsd4_decode_stateid(argp, &locku->lu_stateid); - if (status) - return status; - READ_BUF(16); - READ64(locku->lu_offset); - READ64(locku->lu_length); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(lookup->lo_len); - READ_BUF(lookup->lo_len); - SAVEMEM(lookup->lo_name, lookup->lo_len); - if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) - return status; - - DECODE_TAIL; -} - -static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) -{ - __be32 *p; - u32 w; - - READ_BUF(4); - READ32(w); - *share_access = w & NFS4_SHARE_ACCESS_MASK; - *deleg_want = w & NFS4_SHARE_WANT_MASK; - if (deleg_when) - *deleg_when = w & NFS4_SHARE_WHEN_MASK; - - switch (w & NFS4_SHARE_ACCESS_MASK) { - case NFS4_SHARE_ACCESS_READ: - case NFS4_SHARE_ACCESS_WRITE: - case NFS4_SHARE_ACCESS_BOTH: - break; - default: - return nfserr_bad_xdr; - } - w &= ~NFS4_SHARE_ACCESS_MASK; - if (!w) - return nfs_ok; - if (!argp->minorversion) - return nfserr_bad_xdr; - switch (w & NFS4_SHARE_WANT_MASK) { - case NFS4_SHARE_WANT_NO_PREFERENCE: - case NFS4_SHARE_WANT_READ_DELEG: - case NFS4_SHARE_WANT_WRITE_DELEG: - case NFS4_SHARE_WANT_ANY_DELEG: - case NFS4_SHARE_WANT_NO_DELEG: - case NFS4_SHARE_WANT_CANCEL: - break; - default: - return nfserr_bad_xdr; - } - w &= ~NFS4_SHARE_WANT_MASK; - if (!w) - return nfs_ok; - - if (!deleg_when) /* open_downgrade */ - return nfserr_inval; - switch (w) { - case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: - case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: - case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | - NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): - return nfs_ok; - } -xdr_error: - return nfserr_bad_xdr; -} - -static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) -{ - __be32 *p; - - READ_BUF(4); - READ32(*x); - /* Note: unlinke access bits, deny bits may be zero. */ - if (*x & ~NFS4_SHARE_DENY_BOTH) - return nfserr_bad_xdr; - return nfs_ok; -xdr_error: - return nfserr_bad_xdr; -} - -static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) -{ - __be32 *p; - - READ_BUF(4); - READ32(o->len); - - if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) - return nfserr_bad_xdr; - - READ_BUF(o->len); - SAVEMEM(o->data, o->len); - return nfs_ok; -xdr_error: - return nfserr_bad_xdr; -} - -static __be32 -nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) -{ - DECODE_HEAD; - u32 dummy; - - memset(open->op_bmval, 0, sizeof(open->op_bmval)); - open->op_iattr.ia_valid = 0; - open->op_openowner = NULL; - - /* seqid, share_access, share_deny, clientid, ownerlen */ - READ_BUF(4); - READ32(open->op_seqid); - /* decode, yet ignore deleg_when until supported */ - status = nfsd4_decode_share_access(argp, &open->op_share_access, - &open->op_deleg_want, &dummy); - if (status) - goto xdr_error; - status = nfsd4_decode_share_deny(argp, &open->op_share_deny); - if (status) - goto xdr_error; - READ_BUF(sizeof(clientid_t)); - COPYMEM(&open->op_clientid, sizeof(clientid_t)); - status = nfsd4_decode_opaque(argp, &open->op_owner); - if (status) - goto xdr_error; - READ_BUF(4); - READ32(open->op_create); - switch (open->op_create) { - case NFS4_OPEN_NOCREATE: - break; - case NFS4_OPEN_CREATE: - READ_BUF(4); - READ32(open->op_createmode); - switch (open->op_createmode) { - case NFS4_CREATE_UNCHECKED: - case NFS4_CREATE_GUARDED: - status = nfsd4_decode_fattr(argp, open->op_bmval, - &open->op_iattr, &open->op_acl); - if (status) - goto out; - break; - case NFS4_CREATE_EXCLUSIVE: - READ_BUF(NFS4_VERIFIER_SIZE); - COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); - break; - case NFS4_CREATE_EXCLUSIVE4_1: - if (argp->minorversion < 1) - goto xdr_error; - READ_BUF(NFS4_VERIFIER_SIZE); - COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); - status = nfsd4_decode_fattr(argp, open->op_bmval, - &open->op_iattr, &open->op_acl); - if (status) - goto out; - break; - default: - goto xdr_error; - } - break; - default: - goto xdr_error; - } - - /* open_claim */ - READ_BUF(4); - READ32(open->op_claim_type); - switch (open->op_claim_type) { - case NFS4_OPEN_CLAIM_NULL: - case NFS4_OPEN_CLAIM_DELEGATE_PREV: - READ_BUF(4); - READ32(open->op_fname.len); - READ_BUF(open->op_fname.len); - SAVEMEM(open->op_fname.data, open->op_fname.len); - if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) - return status; - break; - case NFS4_OPEN_CLAIM_PREVIOUS: - READ_BUF(4); - READ32(open->op_delegate_type); - break; - case NFS4_OPEN_CLAIM_DELEGATE_CUR: - status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); - if (status) - return status; - READ_BUF(4); - READ32(open->op_fname.len); - READ_BUF(open->op_fname.len); - SAVEMEM(open->op_fname.data, open->op_fname.len); - if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) - return status; - break; - case NFS4_OPEN_CLAIM_FH: - case NFS4_OPEN_CLAIM_DELEG_PREV_FH: - if (argp->minorversion < 1) - goto xdr_error; - /* void */ - break; - case NFS4_OPEN_CLAIM_DELEG_CUR_FH: - if (argp->minorversion < 1) - goto xdr_error; - status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); - if (status) - return status; - break; - default: - goto xdr_error; - } - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) -{ - DECODE_HEAD; - - status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); - if (status) - return status; - READ_BUF(4); - READ32(open_conf->oc_seqid); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) -{ - DECODE_HEAD; - - status = nfsd4_decode_stateid(argp, &open_down->od_stateid); - if (status) - return status; - READ_BUF(4); - READ32(open_down->od_seqid); - status = nfsd4_decode_share_access(argp, &open_down->od_share_access, - &open_down->od_deleg_want, NULL); - if (status) - return status; - status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); - if (status) - return status; - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(putfh->pf_fhlen); - if (putfh->pf_fhlen > NFS4_FHSIZE) - goto xdr_error; - READ_BUF(putfh->pf_fhlen); - SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) -{ - DECODE_HEAD; - - status = nfsd4_decode_stateid(argp, &read->rd_stateid); - if (status) - return status; - READ_BUF(12); - READ64(read->rd_offset); - READ32(read->rd_length); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) -{ - DECODE_HEAD; - - READ_BUF(24); - READ64(readdir->rd_cookie); - COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); - READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ - READ32(readdir->rd_maxcount); - if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) - goto out; - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(remove->rm_namelen); - READ_BUF(remove->rm_namelen); - SAVEMEM(remove->rm_name, remove->rm_namelen); - if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) - return status; - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(rename->rn_snamelen); - READ_BUF(rename->rn_snamelen + 4); - SAVEMEM(rename->rn_sname, rename->rn_snamelen); - READ32(rename->rn_tnamelen); - READ_BUF(rename->rn_tnamelen); - SAVEMEM(rename->rn_tname, rename->rn_tnamelen); - if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) - return status; - if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) - return status; - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) -{ - DECODE_HEAD; - - READ_BUF(sizeof(clientid_t)); - COPYMEM(clientid, sizeof(clientid_t)); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, - struct nfsd4_secinfo *secinfo) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(secinfo->si_namelen); - READ_BUF(secinfo->si_namelen); - SAVEMEM(secinfo->si_name, secinfo->si_namelen); - status = check_filename(secinfo->si_name, secinfo->si_namelen, - nfserr_noent); - if (status) - return status; - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, - struct nfsd4_secinfo_no_name *sin) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(sin->sin_style); - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) -{ - __be32 status; - - status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); - if (status) - return status; - return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, - &setattr->sa_acl); -} - -static __be32 -nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) -{ - DECODE_HEAD; - - READ_BUF(NFS4_VERIFIER_SIZE); - COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); - - status = nfsd4_decode_opaque(argp, &setclientid->se_name); - if (status) - return nfserr_bad_xdr; - READ_BUF(8); - READ32(setclientid->se_callback_prog); - READ32(setclientid->se_callback_netid_len); - - READ_BUF(setclientid->se_callback_netid_len + 4); - SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); - READ32(setclientid->se_callback_addr_len); - - READ_BUF(setclientid->se_callback_addr_len + 4); - SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); - READ32(setclientid->se_callback_ident); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) -{ - DECODE_HEAD; - - READ_BUF(8 + NFS4_VERIFIER_SIZE); - COPYMEM(&scd_c->sc_clientid, 8); - COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); - - DECODE_TAIL; -} - -/* Also used for NVERIFY */ -static __be32 -nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) -{ -#if 0 - struct nfsd4_compoundargs save = { - .p = argp->p, - .end = argp->end, - .rqstp = argp->rqstp, - }; - u32 ve_bmval[2]; - struct iattr ve_iattr; /* request */ - struct nfs4_acl *ve_acl; /* request */ -#endif - DECODE_HEAD; - - if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) - goto out; - - /* For convenience's sake, we compare raw xdr'd attributes in - * nfsd4_proc_verify; however we still decode here just to return - * correct error in case of bad xdr. */ -#if 0 - status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); - if (status == nfserr_inval) { - status = nfserrno(status); - goto out; - } -#endif - READ_BUF(4); - READ32(verify->ve_attrlen); - READ_BUF(verify->ve_attrlen); - SAVEMEM(verify->ve_attrval, verify->ve_attrlen); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) -{ - int avail; - int v; - int len; - DECODE_HEAD; - - status = nfsd4_decode_stateid(argp, &write->wr_stateid); - if (status) - return status; - READ_BUF(16); - READ64(write->wr_offset); - READ32(write->wr_stable_how); - if (write->wr_stable_how > 2) - goto xdr_error; - READ32(write->wr_buflen); - - /* Sorry .. no magic macros for this.. * - * READ_BUF(write->wr_buflen); - * SAVEMEM(write->wr_buf, write->wr_buflen); - */ - avail = (char*)argp->end - (char*)argp->p; - if (avail + argp->pagelen < write->wr_buflen) { - dprintk("NFSD: xdr error (%s:%d)\n", - __FILE__, __LINE__); - goto xdr_error; - } - argp->rqstp->rq_vec[0].iov_base = p; - argp->rqstp->rq_vec[0].iov_len = avail; - v = 0; - len = write->wr_buflen; - while (len > argp->rqstp->rq_vec[v].iov_len) { - len -= argp->rqstp->rq_vec[v].iov_len; - v++; - argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); - argp->pagelist++; - if (argp->pagelen >= PAGE_SIZE) { - argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; - argp->pagelen -= PAGE_SIZE; - } else { - argp->rqstp->rq_vec[v].iov_len = argp->pagelen; - argp->pagelen -= len; - } - } - argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); - argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); - argp->rqstp->rq_vec[v].iov_len = len; - write->wr_vlen = v+1; - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) -{ - DECODE_HEAD; - - READ_BUF(12); - COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); - READ32(rlockowner->rl_owner.len); - READ_BUF(rlockowner->rl_owner.len); - READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); - - if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) - return nfserr_inval; - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, - struct nfsd4_exchange_id *exid) -{ - int dummy, tmp; - DECODE_HEAD; - - READ_BUF(NFS4_VERIFIER_SIZE); - COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); - - status = nfsd4_decode_opaque(argp, &exid->clname); - if (status) - return nfserr_bad_xdr; - - READ_BUF(4); - READ32(exid->flags); - - /* Ignore state_protect4_a */ - READ_BUF(4); - READ32(exid->spa_how); - switch (exid->spa_how) { - case SP4_NONE: - break; - case SP4_MACH_CRED: - /* spo_must_enforce */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy * 4); - p += dummy; - - /* spo_must_allow */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy * 4); - p += dummy; - break; - case SP4_SSV: - /* ssp_ops */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy * 4); - p += dummy; - - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy * 4); - p += dummy; - - /* ssp_hash_algs<> */ - READ_BUF(4); - READ32(tmp); - while (tmp--) { - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy); - p += XDR_QUADLEN(dummy); - } - - /* ssp_encr_algs<> */ - READ_BUF(4); - READ32(tmp); - while (tmp--) { - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy); - p += XDR_QUADLEN(dummy); - } - - /* ssp_window and ssp_num_gss_handles */ - READ_BUF(8); - READ32(dummy); - READ32(dummy); - break; - default: - goto xdr_error; - } - - /* Ignore Implementation ID */ - READ_BUF(4); /* nfs_impl_id4 array length */ - READ32(dummy); - - if (dummy > 1) - goto xdr_error; - - if (dummy == 1) { - /* nii_domain */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy); - p += XDR_QUADLEN(dummy); - - /* nii_name */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy); - p += XDR_QUADLEN(dummy); - - /* nii_date */ - READ_BUF(12); - p += 3; - } - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, - struct nfsd4_create_session *sess) -{ - DECODE_HEAD; - - u32 dummy; - char *machine_name; - int i; - int nr_secflavs; - - READ_BUF(16); - COPYMEM(&sess->clientid, 8); - READ32(sess->seqid); - READ32(sess->flags); - - /* Fore channel attrs */ - READ_BUF(28); - READ32(dummy); /* headerpadsz is always 0 */ - READ32(sess->fore_channel.maxreq_sz); - READ32(sess->fore_channel.maxresp_sz); - READ32(sess->fore_channel.maxresp_cached); - READ32(sess->fore_channel.maxops); - READ32(sess->fore_channel.maxreqs); - READ32(sess->fore_channel.nr_rdma_attrs); - if (sess->fore_channel.nr_rdma_attrs == 1) { - READ_BUF(4); - READ32(sess->fore_channel.rdma_attrs); - } else if (sess->fore_channel.nr_rdma_attrs > 1) { - dprintk("Too many fore channel attr bitmaps!\n"); - goto xdr_error; - } - - /* Back channel attrs */ - READ_BUF(28); - READ32(dummy); /* headerpadsz is always 0 */ - READ32(sess->back_channel.maxreq_sz); - READ32(sess->back_channel.maxresp_sz); - READ32(sess->back_channel.maxresp_cached); - READ32(sess->back_channel.maxops); - READ32(sess->back_channel.maxreqs); - READ32(sess->back_channel.nr_rdma_attrs); - if (sess->back_channel.nr_rdma_attrs == 1) { - READ_BUF(4); - READ32(sess->back_channel.rdma_attrs); - } else if (sess->back_channel.nr_rdma_attrs > 1) { - dprintk("Too many back channel attr bitmaps!\n"); - goto xdr_error; - } - - READ_BUF(8); - READ32(sess->callback_prog); - - /* callback_sec_params4 */ - READ32(nr_secflavs); - for (i = 0; i < nr_secflavs; ++i) { - READ_BUF(4); - READ32(dummy); - switch (dummy) { - case RPC_AUTH_NULL: - /* Nothing to read */ - break; - case RPC_AUTH_UNIX: - READ_BUF(8); - /* stamp */ - READ32(dummy); - - /* machine name */ - READ32(dummy); - READ_BUF(dummy); - SAVEMEM(machine_name, dummy); - - /* uid, gid */ - READ_BUF(8); - READ32(sess->uid); - READ32(sess->gid); - - /* more gids */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy * 4); - break; - case RPC_AUTH_GSS: - dprintk("RPC_AUTH_GSS callback secflavor " - "not supported!\n"); - READ_BUF(8); - /* gcbp_service */ - READ32(dummy); - /* gcbp_handle_from_server */ - READ32(dummy); - READ_BUF(dummy); - p += XDR_QUADLEN(dummy); - /* gcbp_handle_from_client */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy); - break; - default: - dprintk("Illegal callback secflavor\n"); - return nfserr_inval; - } - } - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, - struct nfsd4_destroy_session *destroy_session) -{ - DECODE_HEAD; - READ_BUF(NFS4_MAX_SESSIONID_LEN); - COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, - struct nfsd4_free_stateid *free_stateid) -{ - DECODE_HEAD; - - READ_BUF(sizeof(stateid_t)); - READ32(free_stateid->fr_stateid.si_generation); - COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, - struct nfsd4_sequence *seq) -{ - DECODE_HEAD; - - READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); - COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); - READ32(seq->seqid); - READ32(seq->slotid); - READ32(seq->maxslots); - READ32(seq->cachethis); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) -{ - int i; - __be32 *p, status; - struct nfsd4_test_stateid_id *stateid; - - READ_BUF(4); - test_stateid->ts_num_ids = ntohl(*p++); - - INIT_LIST_HEAD(&test_stateid->ts_stateid_list); - - for (i = 0; i < test_stateid->ts_num_ids; i++) { - stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL); - if (!stateid) { - status = nfserrno(-ENOMEM); - goto out; - } - - defer_free(argp, kfree, stateid); - INIT_LIST_HEAD(&stateid->ts_id_list); - list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); - - status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); - if (status) - goto out; - } - - status = 0; -out: - return status; -xdr_error: - dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); - status = nfserr_bad_xdr; - goto out; -} - -static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) -{ - DECODE_HEAD; - - READ_BUF(8); - COPYMEM(&dc->clientid, 8); - - DECODE_TAIL; -} - -static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) -{ - DECODE_HEAD; - - READ_BUF(4); - READ32(rc->rca_one_fs); - - DECODE_TAIL; -} - -static __be32 -nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) -{ - return nfs_ok; -} - -static __be32 -nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) -{ - return nfserr_notsupp; -} - -typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); - -static nfsd4_dec nfsd4_dec_ops[] = { - [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, - [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, - [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, - [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, - [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, - [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, - [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, - [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, - [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, - [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, - [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, - [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, - [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, - [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, - [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, - [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, - [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, - [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_READ] = (nfsd4_dec)nfsd4_decode_read, - [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, - [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, - [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, - [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, - [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, - [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, - [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, - [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, - [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, - [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, - [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, - [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, -}; - -static nfsd4_dec nfsd41_dec_ops[] = { - [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, - [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, - [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, - [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, - [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, - [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, - [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, - [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, - [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, - [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, - [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, - [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, - [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, - [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, - [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, - [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, - [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_READ] = (nfsd4_dec)nfsd4_decode_read, - [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, - [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, - [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, - [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, - [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, - [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, - [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, - [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, - [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, - [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, - [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, - - /* new operations for NFSv4.1 */ - [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, - [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, - [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, - [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, - [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, - [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, - [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, - [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, - [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, - [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, -}; - -struct nfsd4_minorversion_ops { - nfsd4_dec *decoders; - int nops; -}; - -static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { - [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, - [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, -}; - -static __be32 -nfsd4_decode_compound(struct nfsd4_compoundargs *argp) -{ - DECODE_HEAD; - struct nfsd4_op *op; - struct nfsd4_minorversion_ops *ops; - bool cachethis = false; - int i; - - /* - * XXX: According to spec, we should check the tag - * for UTF-8 compliance. I'm postponing this for - * now because it seems that some clients do use - * binary tags. - */ - READ_BUF(4); - READ32(argp->taglen); - READ_BUF(argp->taglen + 8); - SAVEMEM(argp->tag, argp->taglen); - READ32(argp->minorversion); - READ32(argp->opcnt); - - if (argp->taglen > NFSD4_MAX_TAGLEN) - goto xdr_error; - if (argp->opcnt > 100) - goto xdr_error; - - if (argp->opcnt > ARRAY_SIZE(argp->iops)) { - argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); - if (!argp->ops) { - argp->ops = argp->iops; - dprintk("nfsd: couldn't allocate room for COMPOUND\n"); - goto xdr_error; - } - } - - if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) - argp->opcnt = 0; - - ops = &nfsd4_minorversion[argp->minorversion]; - for (i = 0; i < argp->opcnt; i++) { - op = &argp->ops[i]; - op->replay = NULL; - - /* - * We can't use READ_BUF() here because we need to handle - * a missing opcode as an OP_WRITE + 1. So we need to check - * to see if we're truly at the end of our buffer or if there - * is another page we need to flip to. - */ - - if (argp->p == argp->end) { - if (argp->pagelen < 4) { - /* There isn't an opcode still on the wire */ - op->opnum = OP_WRITE + 1; - op->status = nfserr_bad_xdr; - argp->opcnt = i+1; - break; - } - - /* - * False alarm. We just hit a page boundary, but there - * is still data available. Move pointer across page - * boundary. *snip from READ_BUF* - */ - argp->p = page_address(argp->pagelist[0]); - argp->pagelist++; - if (argp->pagelen < PAGE_SIZE) { - argp->end = argp->p + (argp->pagelen>>2); - argp->pagelen = 0; - } else { - argp->end = argp->p + (PAGE_SIZE>>2); - argp->pagelen -= PAGE_SIZE; - } - } - op->opnum = ntohl(*argp->p++); - - if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) - op->status = ops->decoders[op->opnum](argp, &op->u); - else { - op->opnum = OP_ILLEGAL; - op->status = nfserr_op_illegal; - } - - if (op->status) { - argp->opcnt = i+1; - break; - } - /* - * We'll try to cache the result in the DRC if any one - * op in the compound wants to be cached: - */ - cachethis |= nfsd4_cache_this_op(op); - } - /* Sessions make the DRC unnecessary: */ - if (argp->minorversion) - cachethis = false; - argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; - - DECODE_TAIL; -} - -#define WRITE32(n) *p++ = htonl(n) -#define WRITE64(n) do { \ - *p++ = htonl((u32)((n) >> 32)); \ - *p++ = htonl((u32)(n)); \ -} while (0) -#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ - *(p + XDR_QUADLEN(nbytes) -1) = 0; \ - memcpy(p, ptr, nbytes); \ - p += XDR_QUADLEN(nbytes); \ -}} while (0) - -static void write32(__be32 **p, u32 n) -{ - *(*p)++ = n; -} - -static void write64(__be32 **p, u64 n) -{ - write32(p, (u32)(n >> 32)); - write32(p, (u32)n); -} - -static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) -{ - if (IS_I_VERSION(inode)) { - write64(p, inode->i_version); - } else { - write32(p, stat->ctime.tv_sec); - write32(p, stat->ctime.tv_nsec); - } -} - -static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) -{ - write32(p, c->atomic); - if (c->change_supported) { - write64(p, c->before_change); - write64(p, c->after_change); - } else { - write32(p, c->before_ctime_sec); - write32(p, c->before_ctime_nsec); - write32(p, c->after_ctime_sec); - write32(p, c->after_ctime_nsec); - } -} - -#define RESERVE_SPACE(nbytes) do { \ - p = resp->p; \ - BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ -} while (0) -#define ADJUST_ARGS() resp->p = p - -/* - * Header routine to setup seqid operation replay cache - */ -#define ENCODE_SEQID_OP_HEAD \ - __be32 *save; \ - \ - save = resp->p; - -/* - * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This - * is where sequence id's are incremented, and the replay cache is filled. - * Note that we increment sequence id's here, at the last moment, so we're sure - * we know whether the error to be returned is a sequence id mutating error. - */ - -static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr) -{ - struct nfs4_stateowner *stateowner = resp->cstate.replay_owner; - - if (seqid_mutating_err(ntohl(nfserr)) && stateowner) { - stateowner->so_seqid++; - stateowner->so_replay.rp_status = nfserr; - stateowner->so_replay.rp_buflen = - (char *)resp->p - (char *)save; - memcpy(stateowner->so_replay.rp_buf, save, - stateowner->so_replay.rp_buflen); - nfsd4_purge_closed_stateid(stateowner); - } -} - -/* Encode as an array of strings the string given with components - * separated @sep. - */ -static __be32 nfsd4_encode_components(char sep, char *components, - __be32 **pp, int *buflen) -{ - __be32 *p = *pp; - __be32 *countp = p; - int strlen, count=0; - char *str, *end; - - dprintk("nfsd4_encode_components(%s)\n", components); - if ((*buflen -= 4) < 0) - return nfserr_resource; - WRITE32(0); /* We will fill this in with @count later */ - end = str = components; - while (*end) { - for (; *end && (*end != sep); end++) - ; /* Point to end of component */ - strlen = end - str; - if (strlen) { - if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) - return nfserr_resource; - WRITE32(strlen); - WRITEMEM(str, strlen); - count++; - } - else - end++; - str = end; - } - *pp = p; - p = countp; - WRITE32(count); - return 0; -} - -/* - * encode a location element of a fs_locations structure - */ -static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, - __be32 **pp, int *buflen) -{ - __be32 status; - __be32 *p = *pp; - - status = nfsd4_encode_components(':', location->hosts, &p, buflen); - if (status) - return status; - status = nfsd4_encode_components('/', location->path, &p, buflen); - if (status) - return status; - *pp = p; - return 0; -} - -/* - * Encode a path in RFC3530 'pathname4' format - */ -static __be32 nfsd4_encode_path(const struct path *root, - const struct path *path, __be32 **pp, int *buflen) -{ - struct path cur = { - .mnt = path->mnt, - .dentry = path->dentry, - }; - __be32 *p = *pp; - struct dentry **components = NULL; - unsigned int ncomponents = 0; - __be32 err = nfserr_jukebox; - - dprintk("nfsd4_encode_components("); - - path_get(&cur); - /* First walk the path up to the nfsd root, and store the - * dentries/path components in an array. - */ - for (;;) { - if (cur.dentry == root->dentry && cur.mnt == root->mnt) - break; - if (cur.dentry == cur.mnt->mnt_root) { - if (follow_up(&cur)) - continue; - goto out_free; - } - if ((ncomponents & 15) == 0) { - struct dentry **new; - new = krealloc(components, - sizeof(*new) * (ncomponents + 16), - GFP_KERNEL); - if (!new) - goto out_free; - components = new; - } - components[ncomponents++] = cur.dentry; - cur.dentry = dget_parent(cur.dentry); - } - - *buflen -= 4; - if (*buflen < 0) - goto out_free; - WRITE32(ncomponents); - - while (ncomponents) { - struct dentry *dentry = components[ncomponents - 1]; - unsigned int len = dentry->d_name.len; - - *buflen -= 4 + (XDR_QUADLEN(len) << 2); - if (*buflen < 0) - goto out_free; - WRITE32(len); - WRITEMEM(dentry->d_name.name, len); - dprintk("/%s", dentry->d_name.name); - dput(dentry); - ncomponents--; - } - - *pp = p; - err = 0; -out_free: - dprintk(")\n"); - while (ncomponents) - dput(components[--ncomponents]); - kfree(components); - path_put(&cur); - return err; -} - -static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp, - const struct path *path, __be32 **pp, int *buflen) -{ - struct svc_export *exp_ps; - __be32 res; - - exp_ps = rqst_find_fsidzero_export(rqstp); - if (IS_ERR(exp_ps)) - return nfserrno(PTR_ERR(exp_ps)); - res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen); - exp_put(exp_ps); - return res; -} - -/* - * encode a fs_locations structure - */ -static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, - struct svc_export *exp, - __be32 **pp, int *buflen) -{ - __be32 status; - int i; - __be32 *p = *pp; - struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; - - status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen); - if (status) - return status; - if ((*buflen -= 4) < 0) - return nfserr_resource; - WRITE32(fslocs->locations_count); - for (i=0; i<fslocs->locations_count; i++) { - status = nfsd4_encode_fs_location4(&fslocs->locations[i], - &p, buflen); - if (status) - return status; - } - *pp = p; - return 0; -} - -static u32 nfs4_file_type(umode_t mode) -{ - switch (mode & S_IFMT) { - case S_IFIFO: return NF4FIFO; - case S_IFCHR: return NF4CHR; - case S_IFDIR: return NF4DIR; - case S_IFBLK: return NF4BLK; - case S_IFLNK: return NF4LNK; - case S_IFREG: return NF4REG; - case S_IFSOCK: return NF4SOCK; - default: return NF4BAD; - }; -} - -static __be32 -nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, - __be32 **p, int *buflen) -{ - int status; - - if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) - return nfserr_resource; - if (whotype != NFS4_ACL_WHO_NAMED) - status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); - else if (group) - status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); - else - status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); - if (status < 0) - return nfserrno(status); - *p = xdr_encode_opaque(*p, NULL, status); - *buflen -= (XDR_QUADLEN(status) << 2) + 4; - BUG_ON(*buflen < 0); - return 0; -} - -static inline __be32 -nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) -{ - return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); -} - -static inline __be32 -nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) -{ - return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); -} - -static inline __be32 -nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, - __be32 **p, int *buflen) -{ - return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); -} - -#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ - FATTR4_WORD0_RDATTR_ERROR) -#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID - -static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) -{ - /* As per referral draft: */ - if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || - *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { - if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || - *bmval0 & FATTR4_WORD0_FS_LOCATIONS) - *rdattr_err = NFSERR_MOVED; - else - return nfserr_moved; - } - *bmval0 &= WORD0_ABSENT_FS_ATTRS; - *bmval1 &= WORD1_ABSENT_FS_ATTRS; - return 0; -} - -/* - * Note: @fhp can be NULL; in this case, we might have to compose the filehandle - * ourselves. - * - * @countp is the buffer size in _words_; upon successful return this becomes - * replaced with the number of words written. - */ -__be32 -nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, - struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, - struct svc_rqst *rqstp, int ignore_crossmnt) -{ - u32 bmval0 = bmval[0]; - u32 bmval1 = bmval[1]; - u32 bmval2 = bmval[2]; - struct kstat stat; - struct svc_fh tempfh; - struct kstatfs statfs; - int buflen = *countp << 2; - __be32 *attrlenp; - u32 dummy; - u64 dummy64; - u32 rdattr_err = 0; - __be32 *p = buffer; - __be32 status; - int err; - int aclsupport = 0; - struct nfs4_acl *acl = NULL; - struct nfsd4_compoundres *resp = rqstp->rq_resp; - u32 minorversion = resp->cstate.minorversion; - struct path path = { - .mnt = exp->ex_path.mnt, - .dentry = dentry, - }; - - BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); - BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); - BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); - BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); - - if (exp->ex_fslocs.migrated) { - BUG_ON(bmval[2]); - status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); - if (status) - goto out; - } - - err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); - if (err) - goto out_nfserr; - if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | - FATTR4_WORD0_MAXNAME)) || - (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | - FATTR4_WORD1_SPACE_TOTAL))) { - err = vfs_statfs(&path, &statfs); - if (err) - goto out_nfserr; - } - if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { - fh_init(&tempfh, NFS4_FHSIZE); - status = fh_compose(&tempfh, exp, dentry, NULL); - if (status) - goto out; - fhp = &tempfh; - } - if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT - | FATTR4_WORD0_SUPPORTED_ATTRS)) { - err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); - aclsupport = (err == 0); - if (bmval0 & FATTR4_WORD0_ACL) { - if (err == -EOPNOTSUPP) - bmval0 &= ~FATTR4_WORD0_ACL; - else if (err == -EINVAL) { - status = nfserr_attrnotsupp; - goto out; - } else if (err != 0) - goto out_nfserr; - } - } - - if (bmval2) { - if ((buflen -= 16) < 0) - goto out_resource; - WRITE32(3); - WRITE32(bmval0); - WRITE32(bmval1); - WRITE32(bmval2); - } else if (bmval1) { - if ((buflen -= 12) < 0) - goto out_resource; - WRITE32(2); - WRITE32(bmval0); - WRITE32(bmval1); - } else { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE32(1); - WRITE32(bmval0); - } - attrlenp = p++; /* to be backfilled later */ - - if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { - u32 word0 = nfsd_suppattrs0(minorversion); - u32 word1 = nfsd_suppattrs1(minorversion); - u32 word2 = nfsd_suppattrs2(minorversion); - - if (!aclsupport) - word0 &= ~FATTR4_WORD0_ACL; - if (!word2) { - if ((buflen -= 12) < 0) - goto out_resource; - WRITE32(2); - WRITE32(word0); - WRITE32(word1); - } else { - if ((buflen -= 16) < 0) - goto out_resource; - WRITE32(3); - WRITE32(word0); - WRITE32(word1); - WRITE32(word2); - } - } - if (bmval0 & FATTR4_WORD0_TYPE) { - if ((buflen -= 4) < 0) - goto out_resource; - dummy = nfs4_file_type(stat.mode); - if (dummy == NF4BAD) - goto out_serverfault; - WRITE32(dummy); - } - if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { - if ((buflen -= 4) < 0) - goto out_resource; - if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) - WRITE32(NFS4_FH_PERSISTENT); - else - WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); - } - if (bmval0 & FATTR4_WORD0_CHANGE) { - if ((buflen -= 8) < 0) - goto out_resource; - write_change(&p, &stat, dentry->d_inode); - } - if (bmval0 & FATTR4_WORD0_SIZE) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE64(stat.size); - } - if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(1); - } - if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(1); - } - if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(0); - } - if (bmval0 & FATTR4_WORD0_FSID) { - if ((buflen -= 16) < 0) - goto out_resource; - if (exp->ex_fslocs.migrated) { - WRITE64(NFS4_REFERRAL_FSID_MAJOR); - WRITE64(NFS4_REFERRAL_FSID_MINOR); - } else switch(fsid_source(fhp)) { - case FSIDSOURCE_FSID: - WRITE64((u64)exp->ex_fsid); - WRITE64((u64)0); - break; - case FSIDSOURCE_DEV: - WRITE32(0); - WRITE32(MAJOR(stat.dev)); - WRITE32(0); - WRITE32(MINOR(stat.dev)); - break; - case FSIDSOURCE_UUID: - WRITEMEM(exp->ex_uuid, 16); - break; - } - } - if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(0); - } - if (bmval0 & FATTR4_WORD0_LEASE_TIME) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(nfsd4_lease); - } - if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(rdattr_err); - } - if (bmval0 & FATTR4_WORD0_ACL) { - struct nfs4_ace *ace; - - if (acl == NULL) { - if ((buflen -= 4) < 0) - goto out_resource; - - WRITE32(0); - goto out_acl; - } - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(acl->naces); - - for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { - if ((buflen -= 4*3) < 0) - goto out_resource; - WRITE32(ace->type); - WRITE32(ace->flag); - WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); - status = nfsd4_encode_aclname(rqstp, ace->whotype, - ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, - &p, &buflen); - if (status == nfserr_resource) - goto out_resource; - if (status) - goto out; - } - } -out_acl: - if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(aclsupport ? - ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); - } - if (bmval0 & FATTR4_WORD0_CANSETTIME) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(1); - } - if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(1); - } - if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(1); - } - if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(1); - } - if (bmval0 & FATTR4_WORD0_FILEHANDLE) { - buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; - if (buflen < 0) - goto out_resource; - WRITE32(fhp->fh_handle.fh_size); - WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); - } - if (bmval0 & FATTR4_WORD0_FILEID) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE64(stat.ino); - } - if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE64((u64) statfs.f_ffree); - } - if (bmval0 & FATTR4_WORD0_FILES_FREE) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE64((u64) statfs.f_ffree); - } - if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE64((u64) statfs.f_files); - } - if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { - status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); - if (status == nfserr_resource) - goto out_resource; - if (status) - goto out; - } - if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(1); - } - if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE64(~(u64)0); - } - if (bmval0 & FATTR4_WORD0_MAXLINK) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(255); - } - if (bmval0 & FATTR4_WORD0_MAXNAME) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(statfs.f_namelen); - } - if (bmval0 & FATTR4_WORD0_MAXREAD) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE64((u64) svc_max_payload(rqstp)); - } - if (bmval0 & FATTR4_WORD0_MAXWRITE) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE64((u64) svc_max_payload(rqstp)); - } - if (bmval1 & FATTR4_WORD1_MODE) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(stat.mode & S_IALLUGO); - } - if (bmval1 & FATTR4_WORD1_NO_TRUNC) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(1); - } - if (bmval1 & FATTR4_WORD1_NUMLINKS) { - if ((buflen -= 4) < 0) - goto out_resource; - WRITE32(stat.nlink); - } - if (bmval1 & FATTR4_WORD1_OWNER) { - status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); - if (status == nfserr_resource) - goto out_resource; - if (status) - goto out; - } - if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { - status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); - if (status == nfserr_resource) - goto out_resource; - if (status) - goto out; - } - if (bmval1 & FATTR4_WORD1_RAWDEV) { - if ((buflen -= 8) < 0) - goto out_resource; - WRITE32((u32) MAJOR(stat.rdev)); - WRITE32((u32) MINOR(stat.rdev)); - } - if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { - if ((buflen -= 8) < 0) - goto out_resource; - dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; - WRITE64(dummy64); - } - if (bmval1 & FATTR4_WORD1_SPACE_FREE) { - if ((buflen -= 8) < 0) - goto out_resource; - dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; - WRITE64(dummy64); - } - if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { - if ((buflen -= 8) < 0) - goto out_resource; - dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; - WRITE64(dummy64); - } - if (bmval1 & FATTR4_WORD1_SPACE_USED) { - if ((buflen -= 8) < 0) - goto out_resource; - dummy64 = (u64)stat.blocks << 9; - WRITE64(dummy64); - } - if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { - if ((buflen -= 12) < 0) - goto out_resource; - WRITE32(0); - WRITE32(stat.atime.tv_sec); - WRITE32(stat.atime.tv_nsec); - } - if (bmval1 & FATTR4_WORD1_TIME_DELTA) { - if ((buflen -= 12) < 0) - goto out_resource; - WRITE32(0); - WRITE32(1); - WRITE32(0); - } - if (bmval1 & FATTR4_WORD1_TIME_METADATA) { - if ((buflen -= 12) < 0) - goto out_resource; - WRITE32(0); - WRITE32(stat.ctime.tv_sec); - WRITE32(stat.ctime.tv_nsec); - } - if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { - if ((buflen -= 12) < 0) - goto out_resource; - WRITE32(0); - WRITE32(stat.mtime.tv_sec); - WRITE32(stat.mtime.tv_nsec); - } - if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { - if ((buflen -= 8) < 0) - goto out_resource; - /* - * Get parent's attributes if not ignoring crossmount - * and this is the root of a cross-mounted filesystem. - */ - if (ignore_crossmnt == 0 && - dentry == exp->ex_path.mnt->mnt_root) { - struct path path = exp->ex_path; - path_get(&path); - while (follow_up(&path)) { - if (path.dentry != path.mnt->mnt_root) - break; - } - err = vfs_getattr(path.mnt, path.dentry, &stat); - path_put(&path); - if (err) - goto out_nfserr; - } - WRITE64(stat.ino); - } - if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { - WRITE32(3); - WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); - WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); - WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); - } - - *attrlenp = htonl((char *)p - (char *)attrlenp - 4); - *countp = p - buffer; - status = nfs_ok; - -out: - kfree(acl); - if (fhp == &tempfh) - fh_put(&tempfh); - return status; -out_nfserr: - status = nfserrno(err); - goto out; -out_resource: - *countp = 0; - status = nfserr_resource; - goto out; -out_serverfault: - status = nfserr_serverfault; - goto out; -} - -static inline int attributes_need_mount(u32 *bmval) -{ - if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) - return 1; - if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) - return 1; - return 0; -} - -static __be32 -nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, - const char *name, int namlen, __be32 *p, int *buflen) -{ - struct svc_export *exp = cd->rd_fhp->fh_export; - struct dentry *dentry; - __be32 nfserr; - int ignore_crossmnt = 0; - - dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); - if (IS_ERR(dentry)) - return nfserrno(PTR_ERR(dentry)); - if (!dentry->d_inode) { - /* - * nfsd_buffered_readdir drops the i_mutex between - * readdir and calling this callback, leaving a window - * where this directory entry could have gone away. - */ - dput(dentry); - return nfserr_noent; - } - - exp_get(exp); - /* - * In the case of a mountpoint, the client may be asking for - * attributes that are only properties of the underlying filesystem - * as opposed to the cross-mounted file system. In such a case, - * we will not follow the cross mount and will fill the attribtutes - * directly from the mountpoint dentry. - */ - if (nfsd_mountpoint(dentry, exp)) { - int err; - - if (!(exp->ex_flags & NFSEXP_V4ROOT) - && !attributes_need_mount(cd->rd_bmval)) { - ignore_crossmnt = 1; - goto out_encode; - } - /* - * Why the heck aren't we just using nfsd_lookup?? - * Different "."/".." handling? Something else? - * At least, add a comment here to explain.... - */ - err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); - if (err) { - nfserr = nfserrno(err); - goto out_put; - } - nfserr = check_nfsd_access(exp, cd->rd_rqstp); - if (nfserr) - goto out_put; - - } -out_encode: - nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, - cd->rd_rqstp, ignore_crossmnt); -out_put: - dput(dentry); - exp_put(exp); - return nfserr; -} - -static __be32 * -nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) -{ - __be32 *attrlenp; - - if (buflen < 6) - return NULL; - *p++ = htonl(2); - *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ - *p++ = htonl(0); /* bmval1 */ - - attrlenp = p++; - *p++ = nfserr; /* no htonl */ - *attrlenp = htonl((char *)p - (char *)attrlenp - 4); - return p; -} - -static int -nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, - loff_t offset, u64 ino, unsigned int d_type) -{ - struct readdir_cd *ccd = ccdv; - struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); - int buflen; - __be32 *p = cd->buffer; - __be32 *cookiep; - __be32 nfserr = nfserr_toosmall; - - /* In nfsv4, "." and ".." never make it onto the wire.. */ - if (name && isdotent(name, namlen)) { - cd->common.err = nfs_ok; - return 0; - } - - if (cd->offset) - xdr_encode_hyper(cd->offset, (u64) offset); - - buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); - if (buflen < 0) - goto fail; - - *p++ = xdr_one; /* mark entry present */ - cookiep = p; - p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ - p = xdr_encode_array(p, name, namlen); /* name length & name */ - - nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); - switch (nfserr) { - case nfs_ok: - p += buflen; - break; - case nfserr_resource: - nfserr = nfserr_toosmall; - goto fail; - case nfserr_noent: - goto skip_entry; - default: - /* - * If the client requested the RDATTR_ERROR attribute, - * we stuff the error code into this attribute - * and continue. If this attribute was not requested, - * then in accordance with the spec, we fail the - * entire READDIR operation(!) - */ - if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) - goto fail; - p = nfsd4_encode_rdattr_error(p, buflen, nfserr); - if (p == NULL) { - nfserr = nfserr_toosmall; - goto fail; - } - } - cd->buflen -= (p - cd->buffer); - cd->buffer = p; - cd->offset = cookiep; -skip_entry: - cd->common.err = nfs_ok; - return 0; -fail: - cd->common.err = nfserr; - return -EINVAL; -} - -static void -nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) -{ - __be32 *p; - - RESERVE_SPACE(sizeof(stateid_t)); - WRITE32(sid->si_generation); - WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); - ADJUST_ARGS(); -} - -static __be32 -nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(8); - WRITE32(access->ac_supported); - WRITE32(access->ac_resp_access); - ADJUST_ARGS(); - } - return nfserr; -} - -static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8); - WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); - WRITE32(bcts->dir); - /* XXX: ? */ - WRITE32(0); - ADJUST_ARGS(); - } - return nfserr; -} - -static __be32 -nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) -{ - ENCODE_SEQID_OP_HEAD; - - if (!nfserr) - nfsd4_encode_stateid(resp, &close->cl_stateid); - - encode_seqid_op_tail(resp, save, nfserr); - return nfserr; -} - - -static __be32 -nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(NFS4_VERIFIER_SIZE); - WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE); - ADJUST_ARGS(); - } - return nfserr; -} - -static __be32 -nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(32); - write_cinfo(&p, &create->cr_cinfo); - WRITE32(2); - WRITE32(create->cr_bmval[0]); - WRITE32(create->cr_bmval[1]); - ADJUST_ARGS(); - } - return nfserr; -} - -static __be32 -nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) -{ - struct svc_fh *fhp = getattr->ga_fhp; - int buflen; - - if (nfserr) - return nfserr; - - buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); - nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, - resp->p, &buflen, getattr->ga_bmval, - resp->rqstp, 0); - if (!nfserr) - resp->p += buflen; - return nfserr; -} - -static __be32 -nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) -{ - struct svc_fh *fhp = *fhpp; - unsigned int len; - __be32 *p; - - if (!nfserr) { - len = fhp->fh_handle.fh_size; - RESERVE_SPACE(len + 4); - WRITE32(len); - WRITEMEM(&fhp->fh_handle.fh_base, len); - ADJUST_ARGS(); - } - return nfserr; -} - -/* -* Including all fields other than the name, a LOCK4denied structure requires -* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. -*/ -static void -nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) -{ - struct xdr_netobj *conf = &ld->ld_owner; - __be32 *p; - - RESERVE_SPACE(32 + XDR_LEN(conf->len)); - WRITE64(ld->ld_start); - WRITE64(ld->ld_length); - WRITE32(ld->ld_type); - if (conf->len) { - WRITEMEM(&ld->ld_clientid, 8); - WRITE32(conf->len); - WRITEMEM(conf->data, conf->len); - kfree(conf->data); - } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ - WRITE64((u64)0); /* clientid */ - WRITE32(0); /* length of owner name */ - } - ADJUST_ARGS(); -} - -static __be32 -nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) -{ - ENCODE_SEQID_OP_HEAD; - - if (!nfserr) - nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); - else if (nfserr == nfserr_denied) - nfsd4_encode_lock_denied(resp, &lock->lk_denied); - - encode_seqid_op_tail(resp, save, nfserr); - return nfserr; -} - -static __be32 -nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) -{ - if (nfserr == nfserr_denied) - nfsd4_encode_lock_denied(resp, &lockt->lt_denied); - return nfserr; -} - -static __be32 -nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) -{ - ENCODE_SEQID_OP_HEAD; - - if (!nfserr) - nfsd4_encode_stateid(resp, &locku->lu_stateid); - - encode_seqid_op_tail(resp, save, nfserr); - return nfserr; -} - - -static __be32 -nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(20); - write_cinfo(&p, &link->li_cinfo); - ADJUST_ARGS(); - } - return nfserr; -} - - -static __be32 -nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) -{ - __be32 *p; - ENCODE_SEQID_OP_HEAD; - - if (nfserr) - goto out; - - nfsd4_encode_stateid(resp, &open->op_stateid); - RESERVE_SPACE(40); - write_cinfo(&p, &open->op_cinfo); - WRITE32(open->op_rflags); - WRITE32(2); - WRITE32(open->op_bmval[0]); - WRITE32(open->op_bmval[1]); - WRITE32(open->op_delegate_type); - ADJUST_ARGS(); - - switch (open->op_delegate_type) { - case NFS4_OPEN_DELEGATE_NONE: - break; - case NFS4_OPEN_DELEGATE_READ: - nfsd4_encode_stateid(resp, &open->op_delegate_stateid); - RESERVE_SPACE(20); - WRITE32(open->op_recall); - - /* - * TODO: ACE's in delegations - */ - WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); - WRITE32(0); - WRITE32(0); - WRITE32(0); /* XXX: is NULL principal ok? */ - ADJUST_ARGS(); - break; - case NFS4_OPEN_DELEGATE_WRITE: - nfsd4_encode_stateid(resp, &open->op_delegate_stateid); - RESERVE_SPACE(32); - WRITE32(0); - - /* - * TODO: space_limit's in delegations - */ - WRITE32(NFS4_LIMIT_SIZE); - WRITE32(~(u32)0); - WRITE32(~(u32)0); - - /* - * TODO: ACE's in delegations - */ - WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); - WRITE32(0); - WRITE32(0); - WRITE32(0); /* XXX: is NULL principal ok? */ - ADJUST_ARGS(); - break; - case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ - switch (open->op_why_no_deleg) { - case WND4_CONTENTION: - case WND4_RESOURCE: - RESERVE_SPACE(8); - WRITE32(open->op_why_no_deleg); - WRITE32(0); /* deleg signaling not supported yet */ - break; - default: - RESERVE_SPACE(4); - WRITE32(open->op_why_no_deleg); - } - ADJUST_ARGS(); - break; - default: - BUG(); - } - /* XXX save filehandle here */ -out: - encode_seqid_op_tail(resp, save, nfserr); - return nfserr; -} - -static __be32 -nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) -{ - ENCODE_SEQID_OP_HEAD; - - if (!nfserr) - nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); - - encode_seqid_op_tail(resp, save, nfserr); - return nfserr; -} - -static __be32 -nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) -{ - ENCODE_SEQID_OP_HEAD; - - if (!nfserr) - nfsd4_encode_stateid(resp, &od->od_stateid); - - encode_seqid_op_tail(resp, save, nfserr); - return nfserr; -} - -static __be32 -nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_read *read) -{ - u32 eof; - int v, pn; - unsigned long maxcount; - long len; - __be32 *p; - - if (nfserr) - return nfserr; - if (resp->xbuf->page_len) - return nfserr_resource; - - RESERVE_SPACE(8); /* eof flag and byte count */ - - maxcount = svc_max_payload(resp->rqstp); - if (maxcount > read->rd_length) - maxcount = read->rd_length; - - len = maxcount; - v = 0; - while (len > 0) { - pn = resp->rqstp->rq_resused++; - resp->rqstp->rq_vec[v].iov_base = - page_address(resp->rqstp->rq_respages[pn]); - resp->rqstp->rq_vec[v].iov_len = - len < PAGE_SIZE ? len : PAGE_SIZE; - v++; - len -= PAGE_SIZE; - } - read->rd_vlen = v; - - nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp, - read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, - &maxcount); - - if (nfserr) - return nfserr; - eof = (read->rd_offset + maxcount >= - read->rd_fhp->fh_dentry->d_inode->i_size); - - WRITE32(eof); - WRITE32(maxcount); - ADJUST_ARGS(); - resp->xbuf->head[0].iov_len = (char*)p - - (char*)resp->xbuf->head[0].iov_base; - resp->xbuf->page_len = maxcount; - - /* Use rest of head for padding and remaining ops: */ - resp->xbuf->tail[0].iov_base = p; - resp->xbuf->tail[0].iov_len = 0; - if (maxcount&3) { - RESERVE_SPACE(4); - WRITE32(0); - resp->xbuf->tail[0].iov_base += maxcount&3; - resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); - ADJUST_ARGS(); - } - return 0; -} - -static __be32 -nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) -{ - int maxcount; - char *page; - __be32 *p; - - if (nfserr) - return nfserr; - if (resp->xbuf->page_len) - return nfserr_resource; - - page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); - - maxcount = PAGE_SIZE; - RESERVE_SPACE(4); - - /* - * XXX: By default, the ->readlink() VFS op will truncate symlinks - * if they would overflow the buffer. Is this kosher in NFSv4? If - * not, one easy fix is: if ->readlink() precisely fills the buffer, - * assume that truncation occurred, and return NFS4ERR_RESOURCE. - */ - nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); - if (nfserr == nfserr_isdir) - return nfserr_inval; - if (nfserr) - return nfserr; - - WRITE32(maxcount); - ADJUST_ARGS(); - resp->xbuf->head[0].iov_len = (char*)p - - (char*)resp->xbuf->head[0].iov_base; - resp->xbuf->page_len = maxcount; - - /* Use rest of head for padding and remaining ops: */ - resp->xbuf->tail[0].iov_base = p; - resp->xbuf->tail[0].iov_len = 0; - if (maxcount&3) { - RESERVE_SPACE(4); - WRITE32(0); - resp->xbuf->tail[0].iov_base += maxcount&3; - resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); - ADJUST_ARGS(); - } - return 0; -} - -static __be32 -nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) -{ - int maxcount; - loff_t offset; - __be32 *page, *savep, *tailbase; - __be32 *p; - - if (nfserr) - return nfserr; - if (resp->xbuf->page_len) - return nfserr_resource; - - RESERVE_SPACE(NFS4_VERIFIER_SIZE); - savep = p; - - /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ - WRITE32(0); - WRITE32(0); - ADJUST_ARGS(); - resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; - tailbase = p; - - maxcount = PAGE_SIZE; - if (maxcount > readdir->rd_maxcount) - maxcount = readdir->rd_maxcount; - - /* - * Convert from bytes to words, account for the two words already - * written, make sure to leave two words at the end for the next - * pointer and eof field. - */ - maxcount = (maxcount >> 2) - 4; - if (maxcount < 0) { - nfserr = nfserr_toosmall; - goto err_no_verf; - } - - page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); - readdir->common.err = 0; - readdir->buflen = maxcount; - readdir->buffer = page; - readdir->offset = NULL; - - offset = readdir->rd_cookie; - nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, - &offset, - &readdir->common, nfsd4_encode_dirent); - if (nfserr == nfs_ok && - readdir->common.err == nfserr_toosmall && - readdir->buffer == page) - nfserr = nfserr_toosmall; - if (nfserr) - goto err_no_verf; - - if (readdir->offset) - xdr_encode_hyper(readdir->offset, offset); - - p = readdir->buffer; - *p++ = 0; /* no more entries */ - *p++ = htonl(readdir->common.err == nfserr_eof); - resp->xbuf->page_len = ((char*)p) - (char*)page_address( - resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); - - /* Use rest of head for padding and remaining ops: */ - resp->xbuf->tail[0].iov_base = tailbase; - resp->xbuf->tail[0].iov_len = 0; - resp->p = resp->xbuf->tail[0].iov_base; - resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; - - return 0; -err_no_verf: - p = savep; - ADJUST_ARGS(); - return nfserr; -} - -static __be32 -nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(20); - write_cinfo(&p, &remove->rm_cinfo); - ADJUST_ARGS(); - } - return nfserr; -} - -static __be32 -nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(40); - write_cinfo(&p, &rename->rn_sinfo); - write_cinfo(&p, &rename->rn_tinfo); - ADJUST_ARGS(); - } - return nfserr; -} - -static __be32 -nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, - __be32 nfserr,struct svc_export *exp) -{ - int i = 0; - u32 nflavs; - struct exp_flavor_info *flavs; - struct exp_flavor_info def_flavs[2]; - __be32 *p; - - if (nfserr) - goto out; - if (exp->ex_nflavors) { - flavs = exp->ex_flavors; - nflavs = exp->ex_nflavors; - } else { /* Handling of some defaults in absence of real secinfo: */ - flavs = def_flavs; - if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { - nflavs = 2; - flavs[0].pseudoflavor = RPC_AUTH_UNIX; - flavs[1].pseudoflavor = RPC_AUTH_NULL; - } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { - nflavs = 1; - flavs[0].pseudoflavor - = svcauth_gss_flavor(exp->ex_client); - } else { - nflavs = 1; - flavs[0].pseudoflavor - = exp->ex_client->flavour->flavour; - } - } - - RESERVE_SPACE(4); - WRITE32(nflavs); - ADJUST_ARGS(); - for (i = 0; i < nflavs; i++) { - u32 flav = flavs[i].pseudoflavor; - struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); - - if (gm) { - RESERVE_SPACE(4); - WRITE32(RPC_AUTH_GSS); - ADJUST_ARGS(); - RESERVE_SPACE(4 + gm->gm_oid.len); - WRITE32(gm->gm_oid.len); - WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); - ADJUST_ARGS(); - RESERVE_SPACE(4); - WRITE32(0); /* qop */ - ADJUST_ARGS(); - RESERVE_SPACE(4); - WRITE32(gss_pseudoflavor_to_service(gm, flav)); - ADJUST_ARGS(); - gss_mech_put(gm); - } else { - RESERVE_SPACE(4); - WRITE32(flav); - ADJUST_ARGS(); - } - } -out: - if (exp) - exp_put(exp); - return nfserr; -} - -static __be32 -nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_secinfo *secinfo) -{ - return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp); -} - -static __be32 -nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_secinfo_no_name *secinfo) -{ - return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp); -} - -/* - * The SETATTR encode routine is special -- it always encodes a bitmap, - * regardless of the error status. - */ -static __be32 -nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) -{ - __be32 *p; - - RESERVE_SPACE(12); - if (nfserr) { - WRITE32(2); - WRITE32(0); - WRITE32(0); - } - else { - WRITE32(2); - WRITE32(setattr->sa_bmval[0]); - WRITE32(setattr->sa_bmval[1]); - } - ADJUST_ARGS(); - return nfserr; -} - -static __be32 -nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE); - WRITEMEM(&scd->se_clientid, 8); - WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE); - ADJUST_ARGS(); - } - else if (nfserr == nfserr_clid_inuse) { - RESERVE_SPACE(8); - WRITE32(0); - WRITE32(0); - ADJUST_ARGS(); - } - return nfserr; -} - -static __be32 -nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) -{ - __be32 *p; - - if (!nfserr) { - RESERVE_SPACE(16); - WRITE32(write->wr_bytes_written); - WRITE32(write->wr_how_written); - WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE); - ADJUST_ARGS(); - } - return nfserr; -} - -static __be32 -nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, - struct nfsd4_exchange_id *exid) -{ - __be32 *p; - char *major_id; - char *server_scope; - int major_id_sz; - int server_scope_sz; - uint64_t minor_id = 0; - - if (nfserr) - return nfserr; - - major_id = utsname()->nodename; - major_id_sz = strlen(major_id); - server_scope = utsname()->nodename; - server_scope_sz = strlen(server_scope); - - RESERVE_SPACE( - 8 /* eir_clientid */ + - 4 /* eir_sequenceid */ + - 4 /* eir_flags */ + - 4 /* spr_how (SP4_NONE) */ + - 8 /* so_minor_id */ + - 4 /* so_major_id.len */ + - (XDR_QUADLEN(major_id_sz) * 4) + - 4 /* eir_server_scope.len */ + - (XDR_QUADLEN(server_scope_sz) * 4) + - 4 /* eir_server_impl_id.count (0) */); - - WRITEMEM(&exid->clientid, 8); - WRITE32(exid->seqid); - WRITE32(exid->flags); - - /* state_protect4_r. Currently only support SP4_NONE */ - BUG_ON(exid->spa_how != SP4_NONE); - WRITE32(exid->spa_how); - - /* The server_owner struct */ - WRITE64(minor_id); /* Minor id */ - /* major id */ - WRITE32(major_id_sz); - WRITEMEM(major_id, major_id_sz); - - /* Server scope */ - WRITE32(server_scope_sz); - WRITEMEM(server_scope, server_scope_sz); - - /* Implementation id */ - WRITE32(0); /* zero length nfs_impl_id4 array */ - ADJUST_ARGS(); - return 0; -} - -static __be32 -nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, - struct nfsd4_create_session *sess) -{ - __be32 *p; - - if (nfserr) - return nfserr; - - RESERVE_SPACE(24); - WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); - WRITE32(sess->seqid); - WRITE32(sess->flags); - ADJUST_ARGS(); - - RESERVE_SPACE(28); - WRITE32(0); /* headerpadsz */ - WRITE32(sess->fore_channel.maxreq_sz); - WRITE32(sess->fore_channel.maxresp_sz); - WRITE32(sess->fore_channel.maxresp_cached); - WRITE32(sess->fore_channel.maxops); - WRITE32(sess->fore_channel.maxreqs); - WRITE32(sess->fore_channel.nr_rdma_attrs); - ADJUST_ARGS(); - - if (sess->fore_channel.nr_rdma_attrs) { - RESERVE_SPACE(4); - WRITE32(sess->fore_channel.rdma_attrs); - ADJUST_ARGS(); - } - - RESERVE_SPACE(28); - WRITE32(0); /* headerpadsz */ - WRITE32(sess->back_channel.maxreq_sz); - WRITE32(sess->back_channel.maxresp_sz); - WRITE32(sess->back_channel.maxresp_cached); - WRITE32(sess->back_channel.maxops); - WRITE32(sess->back_channel.maxreqs); - WRITE32(sess->back_channel.nr_rdma_attrs); - ADJUST_ARGS(); - - if (sess->back_channel.nr_rdma_attrs) { - RESERVE_SPACE(4); - WRITE32(sess->back_channel.rdma_attrs); - ADJUST_ARGS(); - } - return 0; -} - -static __be32 -nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, - struct nfsd4_destroy_session *destroy_session) -{ - return nfserr; -} - -static __be32 -nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr, - struct nfsd4_free_stateid *free_stateid) -{ - __be32 *p; - - if (nfserr) - return nfserr; - - RESERVE_SPACE(4); - WRITE32(nfserr); - ADJUST_ARGS(); - return nfserr; -} - -static __be32 -nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, - struct nfsd4_sequence *seq) -{ - __be32 *p; - - if (nfserr) - return nfserr; - - RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); - WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); - WRITE32(seq->seqid); - WRITE32(seq->slotid); - /* Note slotid's are numbered from zero: */ - WRITE32(seq->maxslots - 1); /* sr_highest_slotid */ - WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */ - WRITE32(seq->status_flags); - - ADJUST_ARGS(); - resp->cstate.datap = p; /* DRC cache data pointer */ - return 0; -} - -__be32 -nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr, - struct nfsd4_test_stateid *test_stateid) -{ - struct nfsd4_test_stateid_id *stateid, *next; - __be32 *p; - - RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids)); - *p++ = htonl(test_stateid->ts_num_ids); - - list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { - *p++ = stateid->ts_id_status; - } - - ADJUST_ARGS(); - return nfserr; -} - -static __be32 -nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) -{ - return nfserr; -} - -typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); - -/* - * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 - * since we don't need to filter out obsolete ops as this is - * done in the decoding phase. - */ -static nfsd4_enc nfsd4_enc_ops[] = { - [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, - [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, - [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, - [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, - [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, - [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, - [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, - [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, - [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, - [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, - [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, - [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, - [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, - [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, - [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, - [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, - [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, - [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, - [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_READ] = (nfsd4_enc)nfsd4_encode_read, - [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, - [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, - [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, - [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, - [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, - [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, - [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, - [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, - [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, - [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, - [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, - [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, - [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, - - /* NFSv4.1 operations */ - [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, - [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, - [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, - [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, - [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, - [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid, - [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, - [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, - [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, - [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, - [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, - [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, - [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, - [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, - [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, - [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, - [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, -}; - -/* - * Calculate the total amount of memory that the compound response has taken - * after encoding the current operation with pad. - * - * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop() - * which was specified at nfsd4_operation, else pad is zero. - * - * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached. - * - * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so - * will be at least a page and will therefore hold the xdr_buf head. - */ -int nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad) -{ - struct xdr_buf *xb = &resp->rqstp->rq_res; - struct nfsd4_session *session = NULL; - struct nfsd4_slot *slot = resp->cstate.slot; - u32 length, tlen = 0; - - if (!nfsd4_has_session(&resp->cstate)) - return 0; - - session = resp->cstate.session; - if (session == NULL) - return 0; - - if (xb->page_len == 0) { - length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; - } else { - if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) - tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; - - length = xb->head[0].iov_len + xb->page_len + tlen + pad; - } - dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, - length, xb->page_len, tlen, pad); - - if (length > session->se_fchannel.maxresp_sz) - return nfserr_rep_too_big; - - if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) && - length > session->se_fchannel.maxresp_cached) - return nfserr_rep_too_big_to_cache; - - return 0; -} - -void -nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) -{ - __be32 *statp; - __be32 *p; - - RESERVE_SPACE(8); - WRITE32(op->opnum); - statp = p++; /* to be backfilled at the end */ - ADJUST_ARGS(); - - if (op->opnum == OP_ILLEGAL) - goto status; - BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || - !nfsd4_enc_ops[op->opnum]); - op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); - /* nfsd4_check_drc_limit guarantees enough room for error status */ - if (!op->status) - op->status = nfsd4_check_resp_size(resp, 0); -status: - /* - * Note: We write the status directly, instead of using WRITE32(), - * since it is already in network byte order. - */ - *statp = op->status; -} - -/* - * Encode the reply stored in the stateowner reply cache - * - * XDR note: do not encode rp->rp_buflen: the buffer contains the - * previously sent already encoded operation. - * - * called with nfs4_lock_state() held - */ -void -nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) -{ - __be32 *p; - struct nfs4_replay *rp = op->replay; - - BUG_ON(!rp); - - RESERVE_SPACE(8); - WRITE32(op->opnum); - *p++ = rp->rp_status; /* already xdr'ed */ - ADJUST_ARGS(); - - RESERVE_SPACE(rp->rp_buflen); - WRITEMEM(rp->rp_buf, rp->rp_buflen); - ADJUST_ARGS(); -} - -int -nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) -{ - return xdr_ressize_check(rqstp, p); -} - -int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) -{ - struct svc_rqst *rqstp = rq; - struct nfsd4_compoundargs *args = rqstp->rq_argp; - - if (args->ops != args->iops) { - kfree(args->ops); - args->ops = args->iops; - } - kfree(args->tmpp); - args->tmpp = NULL; - while (args->to_free) { - struct tmpbuf *tb = args->to_free; - args->to_free = tb->next; - tb->release(tb->buf); - kfree(tb); - } - return 1; -} - -int -nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) -{ - args->p = p; - args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; - args->pagelist = rqstp->rq_arg.pages; - args->pagelen = rqstp->rq_arg.page_len; - args->tmpp = NULL; - args->to_free = NULL; - args->ops = args->iops; - args->rqstp = rqstp; - - return !nfsd4_decode_compound(args); -} - -int -nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) -{ - /* - * All that remains is to write the tag and operation count... - */ - struct nfsd4_compound_state *cs = &resp->cstate; - struct kvec *iov; - p = resp->tagp; - *p++ = htonl(resp->taglen); - memcpy(p, resp->tag, resp->taglen); - p += XDR_QUADLEN(resp->taglen); - *p++ = htonl(resp->opcnt); - - if (rqstp->rq_res.page_len) - iov = &rqstp->rq_res.tail[0]; - else - iov = &rqstp->rq_res.head[0]; - iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; - BUG_ON(iov->iov_len > PAGE_SIZE); - if (nfsd4_has_session(cs)) { - if (cs->status != nfserr_replay_cache) { - nfsd4_store_cache_entry(resp); - cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; - } - /* Renew the clientid on success and on replay */ - release_session_client(cs->session); - nfsd4_put_session(cs->session); - } - return 1; -} - -/* - * Local variables: - * c-basic-offset: 8 - * End: - */ |