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, 3671 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/fs/nfsd/nfs4xdr.c b/ANDROID_3.4.5/fs/nfsd/nfs4xdr.c new file mode 100644 index 00000000..74c00bc9 --- /dev/null +++ b/ANDROID_3.4.5/fs/nfsd/nfs4xdr.c @@ -0,0 +1,3671 @@ +/* + * 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: + */ |