| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Chuck Lever | 12717 | 45.71% | 208 | 42.11% |
| Neil Brown | 3201 | 11.51% | 39 | 7.89% |
| J. Bruce Fields | 3028 | 10.88% | 100 | 20.24% |
| van der Linden, Frank | 2157 | 7.75% | 3 | 0.61% |
| Christoph Hellwig | 1852 | 6.66% | 9 | 1.82% |
| Kees Cook | 1063 | 3.82% | 1 | 0.20% |
| Anna Schumaker | 843 | 3.03% | 17 | 3.44% |
| Benny Halevy | 742 | 2.67% | 18 | 3.64% |
| Andy Adamson | 535 | 1.92% | 9 | 1.82% |
| Trond Myklebust | 384 | 1.38% | 12 | 2.43% |
| Olga Kornievskaia | 383 | 1.38% | 5 | 1.01% |
| Kinglong Mee | 168 | 0.60% | 12 | 2.43% |
| David P. Quigley | 159 | 0.57% | 1 | 0.20% |
| Weston Andros Adamson | 99 | 0.36% | 1 | 0.20% |
| Al Viro | 86 | 0.31% | 6 | 1.21% |
| Jeff Layton | 78 | 0.28% | 10 | 2.02% |
| Andrew Morton | 61 | 0.22% | 6 | 1.21% |
| Eric W. Biedermann | 43 | 0.15% | 2 | 0.40% |
| Andreas Gruenbacher | 38 | 0.14% | 1 | 0.20% |
| Dai Ngo | 36 | 0.13% | 1 | 0.20% |
| Andrew Elble | 20 | 0.07% | 1 | 0.20% |
| Mi Jinlong | 19 | 0.07% | 2 | 0.40% |
| Randy Dunlap | 19 | 0.07% | 1 | 0.20% |
| Linus Torvalds (pre-git) | 18 | 0.06% | 3 | 0.61% |
| Tavian Barnes | 13 | 0.05% | 1 | 0.20% |
| Benjamin Coddington | 9 | 0.03% | 2 | 0.40% |
| Yu Zhiguo | 8 | 0.03% | 2 | 0.40% |
| Arnd Bergmann | 5 | 0.02% | 1 | 0.20% |
| Frank Filz | 4 | 0.01% | 1 | 0.20% |
| Yan Zheng | 4 | 0.01% | 1 | 0.20% |
| Boaz Harrosh | 4 | 0.01% | 2 | 0.40% |
| Stephen Rothwell | 3 | 0.01% | 1 | 0.20% |
| Scott Mayhew | 3 | 0.01% | 2 | 0.40% |
| Andi Kleen | 3 | 0.01% | 1 | 0.20% |
| David Howells | 3 | 0.01% | 1 | 0.20% |
| Daniel Mack | 2 | 0.01% | 2 | 0.40% |
| Ryusei Yamaguchi | 2 | 0.01% | 1 | 0.20% |
| Dan Carpenter | 1 | 0.00% | 1 | 0.20% |
| Steve Dickson | 1 | 0.00% | 1 | 0.20% |
| Tobias Klauser | 1 | 0.00% | 1 | 0.20% |
| Fred Isaman | 1 | 0.00% | 1 | 0.20% |
| Peter Staubach | 1 | 0.00% | 1 | 0.20% |
| Linus Torvalds | 1 | 0.00% | 1 | 0.20% |
| Stanislav Kinsbursky | 1 | 0.00% | 1 | 0.20% |
| Alex Dewar | 1 | 0.00% | 1 | 0.20% |
| Total | 27820 | 494 |
/* * 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. */ #include <linux/file.h> #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 <linux/sunrpc/addr.h> #include <linux/xattr.h> #include <linux/vmalloc.h> #include <uapi/linux/xattr.h> #include "idmap.h" #include "acl.h" #include "xdr4.h" #include "vfs.h" #include "state.h" #include "cache.h" #include "netns.h" #include "pnfs.h" #include "filecache.h" #include "trace.h" #ifdef CONFIG_NFSD_V4_SECURITY_LABEL #include <linux/security.h> #endif #define NFSDDBG_FACILITY NFSDDBG_XDR const u32 nfsd_suppattrs[3][3] = { {NFSD4_SUPPORTED_ATTRS_WORD0, NFSD4_SUPPORTED_ATTRS_WORD1, NFSD4_SUPPORTED_ATTRS_WORD2}, {NFSD4_1_SUPPORTED_ATTRS_WORD0, NFSD4_1_SUPPORTED_ATTRS_WORD1, NFSD4_1_SUPPORTED_ATTRS_WORD2}, {NFSD4_1_SUPPORTED_ATTRS_WORD0, NFSD4_1_SUPPORTED_ATTRS_WORD1, NFSD4_2_SUPPORTED_ATTRS_WORD2}, }; /* * 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) { int i; if (len == 0) return nfserr_inval; if (len > NFS4_MAXNAMLEN) return nfserr_nametoolong; if (isdotent(str, len)) return nfserr_badname; for (i = 0; i < len; i++) if (str[i] == '/') return nfserr_badname; return 0; } static int zero_clientid(clientid_t *clid) { return (clid->cl_boot == 0) && (clid->cl_id == 0); } /** * svcxdr_tmpalloc - allocate memory to be freed after compound processing * @argp: NFSv4 compound argument structure * @len: length of buffer to allocate * * Allocates a buffer of size @len to be freed when processing the compound * operation described in @argp finishes. */ static void * svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) { struct svcxdr_tmpbuf *tb; tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); if (!tb) return NULL; tb->next = argp->to_free; argp->to_free = tb; return tb->buf; } /* * For xdr strings that need to be passed to other kernel api's * as null-terminated strings. * * Note null-terminating in place usually isn't safe since the * buffer might end on a page boundary. */ static char * svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) { char *p = svcxdr_tmpalloc(argp, len + 1); if (!p) return NULL; memcpy(p, buf, len); p[len] = '\0'; return p; } static void * svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len) { __be32 *tmp; /* * The location of the decoded data item is stable, * so @p is OK to use. This is the common case. */ if (p != argp->xdr->scratch.iov_base) return p; tmp = svcxdr_tmpalloc(argp, len); if (!tmp) return NULL; memcpy(tmp, p, len); return tmp; } /* * NFSv4 basic data type decoders */ /* * This helper handles variable-length opaques which belong to protocol * elements that this implementation does not support. */ static __be32 nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen) { u32 len; if (xdr_stream_decode_u32(argp->xdr, &len) < 0) return nfserr_bad_xdr; if (maxlen && len > maxlen) return nfserr_bad_xdr; if (!xdr_inline_decode(argp->xdr, len)) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) { __be32 *p; u32 len; if (xdr_stream_decode_u32(argp->xdr, &len) < 0) return nfserr_bad_xdr; if (len == 0 || len > NFS4_OPAQUE_LIMIT) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, len); if (!p) return nfserr_bad_xdr; o->data = svcxdr_savemem(argp, p, len); if (!o->data) return nfserr_jukebox; o->len = len; return nfs_ok; } static __be32 nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp) { __be32 *p, status; if (xdr_stream_decode_u32(argp->xdr, lenp) < 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, *lenp); if (!p) return nfserr_bad_xdr; status = check_filename((char *)p, *lenp); if (status) return status; *namp = svcxdr_savemem(argp, p, *lenp); if (!*namp) return nfserr_jukebox; return nfs_ok; } static __be32 nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv) { __be32 *p; p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3); if (!p) return nfserr_bad_xdr; p = xdr_decode_hyper(p, &tv->tv_sec); tv->tv_nsec = be32_to_cpup(p++); if (tv->tv_nsec >= (u32)1000000000) return nfserr_inval; return nfs_ok; } static __be32 nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf) { __be32 *p; p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE); if (!p) return nfserr_bad_xdr; memcpy(verf->data, p, sizeof(verf->data)); return nfs_ok; } /** * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4 * @argp: NFSv4 compound argument structure * @bmval: pointer to an array of u32's to decode into * @bmlen: size of the @bmval array * * The server needs to return nfs_ok rather than nfserr_bad_xdr when * encountering bitmaps containing bits it does not recognize. This * includes bits in bitmap words past WORDn, where WORDn is the last * bitmap WORD the implementation currently supports. Thus we are * careful here to simply ignore bits in bitmap words that this * implementation has yet to support explicitly. * * Return values: * %nfs_ok: @bmval populated successfully * %nfserr_bad_xdr: the encoded bitmap was invalid */ static __be32 nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen) { ssize_t status; status = xdr_stream_decode_uint32_array(argp->xdr, bmval, bmlen); return status == -EBADMSG ? nfserr_bad_xdr : nfs_ok; } static __be32 nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace) { __be32 *p, status; u32 length; if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &length) < 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, length); if (!p) return nfserr_bad_xdr; ace->whotype = nfs4_acl_get_whotype((char *)p, length); if (ace->whotype != NFS4_ACL_WHO_NAMED) status = nfs_ok; else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length, &ace->who_gid); else status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length, &ace->who_uid); return status; } /* A counted array of nfsace4's */ static noinline __be32 nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl) { struct nfs4_ace *ace; __be32 status; u32 count; if (xdr_stream_decode_u32(argp->xdr, &count) < 0) return nfserr_bad_xdr; if (count > xdr_stream_remaining(argp->xdr) / 20) /* * Even with 4-byte names there wouldn't be * space for that many aces; something fishy is * going on: */ return nfserr_fbig; *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count)); if (*acl == NULL) return nfserr_jukebox; (*acl)->naces = count; for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) { status = nfsd4_decode_nfsace4(argp, ace); if (status) return status; } return nfs_ok; } static noinline __be32 nfsd4_decode_security_label(struct nfsd4_compoundargs *argp, struct xdr_netobj *label) { u32 lfs, pi, length; __be32 *p; if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &pi) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &length) < 0) return nfserr_bad_xdr; if (length > NFS4_MAXLABELLEN) return nfserr_badlabel; p = xdr_inline_decode(argp->xdr, length); if (!p) return nfserr_bad_xdr; label->len = length; label->data = svcxdr_dupstr(argp, p, length); if (!label->data) return nfserr_jukebox; return nfs_ok; } static __be32 nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen, struct iattr *iattr, struct nfs4_acl **acl, struct xdr_netobj *label, int *umask) { unsigned int starting_pos; u32 attrlist4_count; __be32 *p, status; iattr->ia_valid = 0; status = nfsd4_decode_bitmap4(argp, bmval, bmlen); if (status) return nfserr_bad_xdr; if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) { if (nfsd_attrs_supported(argp->minorversion, bmval)) return nfserr_inval; return nfserr_attrnotsupp; } if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0) return nfserr_bad_xdr; starting_pos = xdr_stream_pos(argp->xdr); if (bmval[0] & FATTR4_WORD0_SIZE) { u64 size; if (xdr_stream_decode_u64(argp->xdr, &size) < 0) return nfserr_bad_xdr; iattr->ia_size = size; iattr->ia_valid |= ATTR_SIZE; } if (bmval[0] & FATTR4_WORD0_ACL) { status = nfsd4_decode_acl(argp, acl); if (status) return status; } else *acl = NULL; if (bmval[1] & FATTR4_WORD1_MODE) { u32 mode; if (xdr_stream_decode_u32(argp->xdr, &mode) < 0) return nfserr_bad_xdr; iattr->ia_mode = mode; iattr->ia_mode &= (S_IFMT | S_IALLUGO); iattr->ia_valid |= ATTR_MODE; } if (bmval[1] & FATTR4_WORD1_OWNER) { u32 length; if (xdr_stream_decode_u32(argp->xdr, &length) < 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, length); if (!p) return nfserr_bad_xdr; status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length, &iattr->ia_uid); if (status) return status; iattr->ia_valid |= ATTR_UID; } if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { u32 length; if (xdr_stream_decode_u32(argp->xdr, &length) < 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, length); if (!p) return nfserr_bad_xdr; status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length, &iattr->ia_gid); if (status) return status; iattr->ia_valid |= ATTR_GID; } if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { u32 set_it; if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) return nfserr_bad_xdr; switch (set_it) { case NFS4_SET_TO_CLIENT_TIME: status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime); if (status) return status; iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); break; case NFS4_SET_TO_SERVER_TIME: iattr->ia_valid |= ATTR_ATIME; break; default: return nfserr_bad_xdr; } } if (bmval[1] & FATTR4_WORD1_TIME_CREATE) { struct timespec64 ts; /* No Linux filesystem supports setting this attribute. */ bmval[1] &= ~FATTR4_WORD1_TIME_CREATE; status = nfsd4_decode_nfstime4(argp, &ts); if (status) return status; } if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { u32 set_it; if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) return nfserr_bad_xdr; switch (set_it) { case NFS4_SET_TO_CLIENT_TIME: status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime); if (status) return status; iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); break; case NFS4_SET_TO_SERVER_TIME: iattr->ia_valid |= ATTR_MTIME; break; default: return nfserr_bad_xdr; } } label->len = 0; if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) && bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { status = nfsd4_decode_security_label(argp, label); if (status) return status; } if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { u32 mode, mask; if (!umask) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &mode) < 0) return nfserr_bad_xdr; iattr->ia_mode = mode & (S_IFMT | S_IALLUGO); if (xdr_stream_decode_u32(argp->xdr, &mask) < 0) return nfserr_bad_xdr; *umask = mask & S_IRWXUGO; iattr->ia_valid |= ATTR_MODE; } /* request sanity: did attrlist4 contain the expected number of words? */ if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid) { __be32 *p; p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE); if (!p) return nfserr_bad_xdr; sid->si_generation = be32_to_cpup(p++); memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque)); return nfs_ok; } static __be32 nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid) { __be32 *p; p = xdr_inline_decode(argp->xdr, sizeof(__be64)); if (!p) return nfserr_bad_xdr; memcpy(clientid, p, sizeof(*clientid)); return nfs_ok; } static __be32 nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp, clientid_t *clientid, struct xdr_netobj *owner) { __be32 status; status = nfsd4_decode_clientid4(argp, clientid); if (status) return status; return nfsd4_decode_opaque(argp, owner); } #ifdef CONFIG_NFSD_PNFS static __be32 nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp, struct nfsd4_deviceid *devid) { __be32 *p; p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE); if (!p) return nfserr_bad_xdr; memcpy(devid, p, sizeof(*devid)); return nfs_ok; } static __be32 nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp, struct nfsd4_layoutcommit *lcp) { if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0) return nfserr_bad_xdr; if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES) return nfserr_bad_xdr; if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0) return nfserr_bad_xdr; if (lcp->lc_up_len > 0) { lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len); if (!lcp->lc_up_layout) return nfserr_bad_xdr; } return nfs_ok; } static __be32 nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp, struct nfsd4_layoutreturn *lrp) { __be32 status; if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0) return nfserr_bad_xdr; switch (lrp->lr_return_type) { case RETURN_FILE: if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0) return nfserr_bad_xdr; status = nfsd4_decode_stateid4(argp, &lrp->lr_sid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0) return nfserr_bad_xdr; if (lrp->lrf_body_len > 0) { lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len); if (!lrp->lrf_body) return nfserr_bad_xdr; } break; case RETURN_FSID: case RETURN_ALL: lrp->lr_seg.offset = 0; lrp->lr_seg.length = NFS4_MAX_UINT64; break; default: return nfserr_bad_xdr; } return nfs_ok; } #endif /* CONFIG_NFSD_PNFS */ static __be32 nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp, struct nfs4_sessionid *sessionid) { __be32 *p; p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN); if (!p) return nfserr_bad_xdr; memcpy(sessionid->data, p, sizeof(sessionid->data)); return nfs_ok; } /* Defined in Appendix A of RFC 5531 */ static __be32 nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) { u32 stamp, gidcount, uid, gid; __be32 *p, status; if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0) return nfserr_bad_xdr; /* machine name */ status = nfsd4_decode_ignored_string(argp, 255); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &uid) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &gid) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0) return nfserr_bad_xdr; if (gidcount > 16) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, gidcount << 2); if (!p) return nfserr_bad_xdr; if (cbs->flavor == (u32)(-1)) { struct user_namespace *userns = nfsd_user_namespace(argp->rqstp); kuid_t kuid = make_kuid(userns, uid); kgid_t kgid = make_kgid(userns, gid); if (uid_valid(kuid) && gid_valid(kgid)) { cbs->uid = kuid; cbs->gid = kgid; cbs->flavor = RPC_AUTH_UNIX; } else { dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n"); } } return nfs_ok; } static __be32 nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) { __be32 status; u32 service; dprintk("RPC_AUTH_GSS callback secflavor not supported!\n"); if (xdr_stream_decode_u32(argp->xdr, &service) < 0) return nfserr_bad_xdr; if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY) return nfserr_bad_xdr; /* gcbp_handle_from_server */ status = nfsd4_decode_ignored_string(argp, 0); if (status) return status; /* gcbp_handle_from_client */ status = nfsd4_decode_ignored_string(argp, 0); if (status) return status; return nfs_ok; } /* a counted array of callback_sec_parms4 items */ static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) { u32 i, secflavor, nr_secflavs; __be32 status; /* callback_sec_params4 */ if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0) return nfserr_bad_xdr; if (nr_secflavs) cbs->flavor = (u32)(-1); else /* Is this legal? Be generous, take it to mean AUTH_NONE: */ cbs->flavor = 0; for (i = 0; i < nr_secflavs; ++i) { if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0) return nfserr_bad_xdr; switch (secflavor) { case RPC_AUTH_NULL: /* void */ if (cbs->flavor == (u32)(-1)) cbs->flavor = RPC_AUTH_NULL; break; case RPC_AUTH_UNIX: status = nfsd4_decode_authsys_parms(argp, cbs); if (status) return status; break; case RPC_AUTH_GSS: status = nfsd4_decode_gss_cb_handles4(argp, cbs); if (status) return status; break; default: return nfserr_inval; } } return nfs_ok; } /* * NFSv4 operation argument decoders */ static __be32 nfsd4_decode_access(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_access *access = &u->access; if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_close(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_close *close = &u->close; if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0) return nfserr_bad_xdr; return nfsd4_decode_stateid4(argp, &close->cl_stateid); } static __be32 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_commit *commit = &u->commit; if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0) return nfserr_bad_xdr; memset(&commit->co_verf, 0, sizeof(commit->co_verf)); return nfs_ok; } static __be32 nfsd4_decode_create(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_create *create = &u->create; __be32 *p, status; memset(create, 0, sizeof(*create)); if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0) return nfserr_bad_xdr; switch (create->cr_type) { case NF4LNK: if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, create->cr_datalen); if (!p) return nfserr_bad_xdr; create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); if (!create->cr_data) return nfserr_jukebox; break; case NF4BLK: case NF4CHR: if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0) return nfserr_bad_xdr; break; case NF4SOCK: case NF4FIFO: case NF4DIR: default: break; } status = nfsd4_decode_component4(argp, &create->cr_name, &create->cr_namelen); if (status) return status; status = nfsd4_decode_fattr4(argp, create->cr_bmval, ARRAY_SIZE(create->cr_bmval), &create->cr_iattr, &create->cr_acl, &create->cr_label, &create->cr_umask); if (status) return status; return nfs_ok; } static inline __be32 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_delegreturn *dr = &u->delegreturn; return nfsd4_decode_stateid4(argp, &dr->dr_stateid); } static inline __be32 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_getattr *getattr = &u->getattr; memset(getattr, 0, sizeof(*getattr)); return nfsd4_decode_bitmap4(argp, getattr->ga_bmval, ARRAY_SIZE(getattr->ga_bmval)); } static __be32 nfsd4_decode_link(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_link *link = &u->link; memset(link, 0, sizeof(*link)); return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen); } static __be32 nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) { __be32 status; if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0) return nfserr_bad_xdr; status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0) return nfserr_bad_xdr; return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid, &lock->lk_new_owner); } static __be32 nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) { __be32 status; status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) { if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0) return nfserr_bad_xdr; if (lock->lk_is_new) return nfsd4_decode_open_to_lock_owner4(argp, lock); return nfsd4_decode_exist_lock_owner4(argp, lock); } static __be32 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_lock *lock = &u->lock; memset(lock, 0, sizeof(*lock)); if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0) return nfserr_bad_xdr; if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) return nfserr_bad_xdr; if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0) return nfserr_bad_xdr; return nfsd4_decode_locker4(argp, lock); } static __be32 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_lockt *lockt = &u->lockt; memset(lockt, 0, sizeof(*lockt)); if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0) return nfserr_bad_xdr; if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0) return nfserr_bad_xdr; return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid, &lockt->lt_owner); } static __be32 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_locku *locku = &u->locku; __be32 status; if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0) return nfserr_bad_xdr; if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0) return nfserr_bad_xdr; status = nfsd4_decode_stateid4(argp, &locku->lu_stateid); if (status) return status; if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_lookup *lookup = &u->lookup; return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len); } static __be32 nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) { __be32 status; if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0) return nfserr_bad_xdr; switch (open->op_createmode) { case NFS4_CREATE_UNCHECKED: case NFS4_CREATE_GUARDED: status = nfsd4_decode_fattr4(argp, open->op_bmval, ARRAY_SIZE(open->op_bmval), &open->op_iattr, &open->op_acl, &open->op_label, &open->op_umask); if (status) return status; break; case NFS4_CREATE_EXCLUSIVE: status = nfsd4_decode_verifier4(argp, &open->op_verf); if (status) return status; break; case NFS4_CREATE_EXCLUSIVE4_1: if (argp->minorversion < 1) return nfserr_bad_xdr; status = nfsd4_decode_verifier4(argp, &open->op_verf); if (status) return status; status = nfsd4_decode_fattr4(argp, open->op_bmval, ARRAY_SIZE(open->op_bmval), &open->op_iattr, &open->op_acl, &open->op_label, &open->op_umask); if (status) return status; break; default: return nfserr_bad_xdr; } return nfs_ok; } static __be32 nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) { __be32 status; if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0) return nfserr_bad_xdr; switch (open->op_create) { case NFS4_OPEN_NOCREATE: break; case NFS4_OPEN_CREATE: status = nfsd4_decode_createhow4(argp, open); if (status) return status; break; default: return nfserr_bad_xdr; } return nfs_ok; } static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) { u32 w; if (xdr_stream_decode_u32(argp->xdr, &w) < 0) return nfserr_bad_xdr; *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; } return nfserr_bad_xdr; } static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) { if (xdr_stream_decode_u32(argp->xdr, x) < 0) return nfserr_bad_xdr; /* Note: unlike access bits, deny bits may be zero. */ if (*x & ~NFS4_SHARE_DENY_BOTH) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) { __be32 status; if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0) return nfserr_bad_xdr; switch (open->op_claim_type) { case NFS4_OPEN_CLAIM_NULL: case NFS4_OPEN_CLAIM_DELEGATE_PREV: status = nfsd4_decode_component4(argp, &open->op_fname, &open->op_fnamelen); if (status) return status; break; case NFS4_OPEN_CLAIM_PREVIOUS: if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0) return nfserr_bad_xdr; break; case NFS4_OPEN_CLAIM_DELEGATE_CUR: status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid); if (status) return status; status = nfsd4_decode_component4(argp, &open->op_fname, &open->op_fnamelen); if (status) return status; break; case NFS4_OPEN_CLAIM_FH: case NFS4_OPEN_CLAIM_DELEG_PREV_FH: if (argp->minorversion < 1) return nfserr_bad_xdr; /* void */ break; case NFS4_OPEN_CLAIM_DELEG_CUR_FH: if (argp->minorversion < 1) return nfserr_bad_xdr; status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid); if (status) return status; break; default: return nfserr_bad_xdr; } return nfs_ok; } static __be32 nfsd4_decode_open(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_open *open = &u->open; __be32 status; u32 dummy; memset(open, 0, sizeof(*open)); if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0) return nfserr_bad_xdr; /* deleg_want is ignored */ status = nfsd4_decode_share_access(argp, &open->op_share_access, &open->op_deleg_want, &dummy); if (status) return status; status = nfsd4_decode_share_deny(argp, &open->op_share_deny); if (status) return status; status = nfsd4_decode_state_owner4(argp, &open->op_clientid, &open->op_owner); if (status) return status; status = nfsd4_decode_openflag4(argp, open); if (status) return status; return nfsd4_decode_open_claim4(argp, open); } static __be32 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_open_confirm *open_conf = &u->open_confirm; __be32 status; if (argp->minorversion >= 1) return nfserr_notsupp; status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0) return nfserr_bad_xdr; memset(&open_conf->oc_resp_stateid, 0, sizeof(open_conf->oc_resp_stateid)); return nfs_ok; } static __be32 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_open_downgrade *open_down = &u->open_downgrade; __be32 status; memset(open_down, 0, sizeof(*open_down)); status = nfsd4_decode_stateid4(argp, &open_down->od_stateid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0) return nfserr_bad_xdr; /* deleg_want is ignored */ status = nfsd4_decode_share_access(argp, &open_down->od_share_access, &open_down->od_deleg_want, NULL); if (status) return status; return nfsd4_decode_share_deny(argp, &open_down->od_share_deny); } static __be32 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_putfh *putfh = &u->putfh; __be32 *p; if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0) return nfserr_bad_xdr; if (putfh->pf_fhlen > NFS4_FHSIZE) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen); if (!p) return nfserr_bad_xdr; putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen); if (!putfh->pf_fhval) return nfserr_jukebox; putfh->no_verify = false; return nfs_ok; } static __be32 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) { if (argp->minorversion == 0) return nfs_ok; return nfserr_notsupp; } static __be32 nfsd4_decode_read(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_read *read = &u->read; __be32 status; memset(read, 0, sizeof(*read)); status = nfsd4_decode_stateid4(argp, &read->rd_stateid); if (status) return status; if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_readdir *readdir = &u->readdir; __be32 status; memset(readdir, 0, sizeof(*readdir)); if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0) return nfserr_bad_xdr; status = nfsd4_decode_verifier4(argp, &readdir->rd_verf); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval, ARRAY_SIZE(readdir->rd_bmval)) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_remove *remove = &u->remove; memset(&remove->rm_cinfo, 0, sizeof(remove->rm_cinfo)); return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen); } static __be32 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_rename *rename = &u->rename; __be32 status; memset(rename, 0, sizeof(*rename)); status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen); if (status) return status; return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen); } static __be32 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { clientid_t *clientid = &u->renew; return nfsd4_decode_clientid4(argp, clientid); } static __be32 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_secinfo *secinfo = &u->secinfo; secinfo->si_exp = NULL; return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen); } static __be32 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_setattr *setattr = &u->setattr; __be32 status; memset(setattr, 0, sizeof(*setattr)); status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid); if (status) return status; return nfsd4_decode_fattr4(argp, setattr->sa_bmval, ARRAY_SIZE(setattr->sa_bmval), &setattr->sa_iattr, &setattr->sa_acl, &setattr->sa_label, NULL); } static __be32 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_setclientid *setclientid = &u->setclientid; __be32 *p, status; memset(setclientid, 0, sizeof(*setclientid)); if (argp->minorversion >= 1) return nfserr_notsupp; status = nfsd4_decode_verifier4(argp, &setclientid->se_verf); if (status) return status; status = nfsd4_decode_opaque(argp, &setclientid->se_name); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len); if (!p) return nfserr_bad_xdr; setclientid->se_callback_netid_val = svcxdr_savemem(argp, p, setclientid->se_callback_netid_len); if (!setclientid->se_callback_netid_val) return nfserr_jukebox; if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len); if (!p) return nfserr_bad_xdr; setclientid->se_callback_addr_val = svcxdr_savemem(argp, p, setclientid->se_callback_addr_len); if (!setclientid->se_callback_addr_val) return nfserr_jukebox; if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_setclientid_confirm *scd_c = &u->setclientid_confirm; __be32 status; if (argp->minorversion >= 1) return nfserr_notsupp; status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid); if (status) return status; return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm); } /* Also used for NVERIFY */ static __be32 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_verify *verify = &u->verify; __be32 *p, status; memset(verify, 0, sizeof(*verify)); status = nfsd4_decode_bitmap4(argp, verify->ve_bmval, ARRAY_SIZE(verify->ve_bmval)); if (status) return status; /* For convenience's sake, we compare raw xdr'd attributes in * nfsd4_proc_verify */ if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, verify->ve_attrlen); if (!p) return nfserr_bad_xdr; verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen); if (!verify->ve_attrval) return nfserr_jukebox; return nfs_ok; } static __be32 nfsd4_decode_write(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_write *write = &u->write; __be32 status; status = nfsd4_decode_stateid4(argp, &write->wr_stateid); if (status) return status; if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0) return nfserr_bad_xdr; if (write->wr_stable_how > NFS_FILE_SYNC) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0) return nfserr_bad_xdr; if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen)) return nfserr_bad_xdr; write->wr_bytes_written = 0; write->wr_how_written = 0; memset(&write->wr_verifier, 0, sizeof(write->wr_verifier)); return nfs_ok; } static __be32 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; __be32 status; if (argp->minorversion >= 1) return nfserr_notsupp; status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid, &rlockowner->rl_owner); if (status) return status; if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) return nfserr_inval; return nfs_ok; } static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; memset(bc, 0, sizeof(*bc)); if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0) return nfserr_bad_xdr; return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); } static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; u32 use_conn_in_rdma_mode; __be32 status; memset(bcts, 0, sizeof(*bcts)); status = nfsd4_decode_sessionid4(argp, &bcts->sessionid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp, struct nfsd4_exchange_id *exid) { __be32 status; status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce, ARRAY_SIZE(exid->spo_must_enforce)); if (status) return nfserr_bad_xdr; status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow, ARRAY_SIZE(exid->spo_must_allow)); if (status) return nfserr_bad_xdr; return nfs_ok; } /* * This implementation currently does not support SP4_SSV. * This decoder simply skips over these arguments. */ static noinline __be32 nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp, struct nfsd4_exchange_id *exid) { u32 count, window, num_gss_handles; __be32 status; /* ssp_ops */ status = nfsd4_decode_state_protect_ops(argp, exid); if (status) return status; /* ssp_hash_algs<> */ if (xdr_stream_decode_u32(argp->xdr, &count) < 0) return nfserr_bad_xdr; while (count--) { status = nfsd4_decode_ignored_string(argp, 0); if (status) return status; } /* ssp_encr_algs<> */ if (xdr_stream_decode_u32(argp->xdr, &count) < 0) return nfserr_bad_xdr; while (count--) { status = nfsd4_decode_ignored_string(argp, 0); if (status) return status; } if (xdr_stream_decode_u32(argp->xdr, &window) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp, struct nfsd4_exchange_id *exid) { __be32 status; if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0) return nfserr_bad_xdr; switch (exid->spa_how) { case SP4_NONE: break; case SP4_MACH_CRED: status = nfsd4_decode_state_protect_ops(argp, exid); if (status) return status; break; case SP4_SSV: status = nfsd4_decode_ssv_sp_parms(argp, exid); if (status) return status; break; default: return nfserr_bad_xdr; } return nfs_ok; } static __be32 nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp, struct nfsd4_exchange_id *exid) { __be32 status; u32 count; if (xdr_stream_decode_u32(argp->xdr, &count) < 0) return nfserr_bad_xdr; switch (count) { case 0: break; case 1: /* Note that RFC 8881 places no length limit on * nii_domain, but this implementation permits no * more than NFS4_OPAQUE_LIMIT bytes */ status = nfsd4_decode_opaque(argp, &exid->nii_domain); if (status) return status; /* Note that RFC 8881 places no length limit on * nii_name, but this implementation permits no * more than NFS4_OPAQUE_LIMIT bytes */ status = nfsd4_decode_opaque(argp, &exid->nii_name); if (status) return status; status = nfsd4_decode_nfstime4(argp, &exid->nii_time); if (status) return status; break; default: return nfserr_bad_xdr; } return nfs_ok; } static __be32 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_exchange_id *exid = &u->exchange_id; __be32 status; memset(exid, 0, sizeof(*exid)); status = nfsd4_decode_verifier4(argp, &exid->verifier); if (status) return status; status = nfsd4_decode_opaque(argp, &exid->clname); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0) return nfserr_bad_xdr; status = nfsd4_decode_state_protect4_a(argp, exid); if (status) return status; return nfsd4_decode_nfs_impl_id4(argp, exid); } static __be32 nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp, struct nfsd4_channel_attrs *ca) { __be32 *p; p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7); if (!p) return nfserr_bad_xdr; /* headerpadsz is ignored */ p++; ca->maxreq_sz = be32_to_cpup(p++); ca->maxresp_sz = be32_to_cpup(p++); ca->maxresp_cached = be32_to_cpup(p++); ca->maxops = be32_to_cpup(p++); ca->maxreqs = be32_to_cpup(p++); ca->nr_rdma_attrs = be32_to_cpup(p); switch (ca->nr_rdma_attrs) { case 0: break; case 1: if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0) return nfserr_bad_xdr; break; default: return nfserr_bad_xdr; } return nfs_ok; } static __be32 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_create_session *sess = &u->create_session; __be32 status; memset(sess, 0, sizeof(*sess)); status = nfsd4_decode_clientid4(argp, &sess->clientid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0) return nfserr_bad_xdr; status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel); if (status) return status; status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0) return nfserr_bad_xdr; return nfsd4_decode_cb_sec(argp, &sess->cb_sec); } static __be32 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_destroy_session *destroy_session = &u->destroy_session; return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid); } static __be32 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_free_stateid *free_stateid = &u->free_stateid; return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid); } #ifdef CONFIG_NFSD_PNFS static __be32 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo; __be32 status; memset(gdev, 0, sizeof(*gdev)); status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_uint32_array(argp->xdr, &gdev->gd_notify_types, 1) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_layoutcommit *lcp = &u->layoutcommit; __be32 *p, status; memset(lcp, 0, sizeof(*lcp)); if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0) return nfserr_bad_xdr; status = nfsd4_decode_stateid4(argp, &lcp->lc_sid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0) return nfserr_bad_xdr; if (lcp->lc_newoffset) { if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0) return nfserr_bad_xdr; } else lcp->lc_last_wr = 0; p = xdr_inline_decode(argp->xdr, XDR_UNIT); if (!p) return nfserr_bad_xdr; if (xdr_item_is_present(p)) { status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime); if (status) return status; } else { lcp->lc_mtime.tv_nsec = UTIME_NOW; } return nfsd4_decode_layoutupdate4(argp, lcp); } static __be32 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_layoutget *lgp = &u->layoutget; __be32 status; memset(lgp, 0, sizeof(*lgp)); if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0) return nfserr_bad_xdr; status = nfsd4_decode_stateid4(argp, &lgp->lg_sid); if (status) return status; if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_layoutreturn *lrp = &u->layoutreturn; memset(lrp, 0, sizeof(*lrp)); if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0) return nfserr_bad_xdr; return nfsd4_decode_layoutreturn4(argp, lrp); } #endif /* CONFIG_NFSD_PNFS */ static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_secinfo_no_name *sin = &u->secinfo_no_name; if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0) return nfserr_bad_xdr; sin->sin_exp = NULL; return nfs_ok; } static __be32 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_sequence *seq = &u->sequence; __be32 *p, status; status = nfsd4_decode_sessionid4(argp, &seq->sessionid); if (status) return status; p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4); if (!p) return nfserr_bad_xdr; seq->seqid = be32_to_cpup(p++); seq->slotid = be32_to_cpup(p++); seq->maxslots = be32_to_cpup(p++); seq->cachethis = be32_to_cpup(p); seq->status_flags = 0; return nfs_ok; } static __be32 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_test_stateid *test_stateid = &u->test_stateid; struct nfsd4_test_stateid_id *stateid; __be32 status; u32 i; memset(test_stateid, 0, sizeof(*test_stateid)); if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0) return nfserr_bad_xdr; INIT_LIST_HEAD(&test_stateid->ts_stateid_list); for (i = 0; i < test_stateid->ts_num_ids; i++) { stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); if (!stateid) return nfserr_jukebox; INIT_LIST_HEAD(&stateid->ts_id_list); list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid); if (status) return status; } return nfs_ok; } static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; return nfsd4_decode_clientid4(argp, &dc->clientid); } static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_fallocate *fallocate = &u->allocate; __be32 status; status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid); if (status) return status; if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0) return nfserr_bad_xdr; return nfs_ok; } static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp, struct nl4_server *ns) { struct nfs42_netaddr *naddr; __be32 *p; if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0) return nfserr_bad_xdr; /* currently support for 1 inter-server source server */ switch (ns->nl4_type) { case NL4_NETADDR: naddr = &ns->u.nl4_addr; if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0) return nfserr_bad_xdr; if (naddr->netid_len > RPCBIND_MAXNETIDLEN) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, naddr->netid_len); if (!p) return nfserr_bad_xdr; memcpy(naddr->netid, p, naddr->netid_len); if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0) return nfserr_bad_xdr; if (naddr->addr_len > RPCBIND_MAXUADDRLEN) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, naddr->addr_len); if (!p) return nfserr_bad_xdr; memcpy(naddr->addr, p, naddr->addr_len); break; default: return nfserr_bad_xdr; } return nfs_ok; } static __be32 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_copy *copy = &u->copy; u32 consecutive, i, count, sync; struct nl4_server *ns_dummy; __be32 status; memset(copy, 0, sizeof(*copy)); status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid); if (status) return status; status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid); if (status) return status; if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0) return nfserr_bad_xdr; /* ca_consecutive: we always do consecutive copies */ if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_bool(argp->xdr, &sync) < 0) return nfserr_bad_xdr; nfsd4_copy_set_sync(copy, sync); if (xdr_stream_decode_u32(argp->xdr, &count) < 0) return nfserr_bad_xdr; copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src)); if (copy->cp_src == NULL) return nfserr_jukebox; if (count == 0) { /* intra-server copy */ __set_bit(NFSD4_COPY_F_INTRA, ©->cp_flags); return nfs_ok; } /* decode all the supplied server addresses but use only the first */ status = nfsd4_decode_nl4_server(argp, copy->cp_src); if (status) return status; ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL); if (ns_dummy == NULL) return nfserr_jukebox; for (i = 0; i < count - 1; i++) { status = nfsd4_decode_nl4_server(argp, ns_dummy); if (status) { kfree(ns_dummy); return status; } } kfree(ns_dummy); return nfs_ok; } static __be32 nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_copy_notify *cn = &u->copy_notify; __be32 status; memset(cn, 0, sizeof(*cn)); cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src)); if (cn->cpn_src == NULL) return nfserr_jukebox; cn->cpn_dst = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_dst)); if (cn->cpn_dst == NULL) return nfserr_jukebox; status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid); if (status) return status; return nfsd4_decode_nl4_server(argp, cn->cpn_dst); } static __be32 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_offload_status *os = &u->offload_status; os->count = 0; os->status = 0; return nfsd4_decode_stateid4(argp, &os->stateid); } static __be32 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_seek *seek = &u->seek; __be32 status; status = nfsd4_decode_stateid4(argp, &seek->seek_stateid); if (status) return status; if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0) return nfserr_bad_xdr; seek->seek_eof = 0; seek->seek_pos = 0; return nfs_ok; } static __be32 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_clone *clone = &u->clone; __be32 status; status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid); if (status) return status; status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid); if (status) return status; if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0) return nfserr_bad_xdr; if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0) return nfserr_bad_xdr; return nfs_ok; } /* * XDR data that is more than PAGE_SIZE in size is normally part of a * read or write. However, the size of extended attributes is limited * by the maximum request size, and then further limited by the underlying * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX * is 64k). Since there is no kvec- or page-based interface to xattrs, * and we're not dealing with contiguous pages, we need to do some copying. */ /* * Decode data into buffer. */ static __be32 nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr, char **bufp, u32 buflen) { struct page **pages = xdr->pages; struct kvec *head = xdr->head; char *tmp, *dp; u32 len; if (buflen <= head->iov_len) { /* * We're in luck, the head has enough space. Just return * the head, no need for copying. */ *bufp = head->iov_base; return 0; } tmp = svcxdr_tmpalloc(argp, buflen); if (tmp == NULL) return nfserr_jukebox; dp = tmp; memcpy(dp, head->iov_base, head->iov_len); buflen -= head->iov_len; dp += head->iov_len; while (buflen > 0) { len = min_t(u32, buflen, PAGE_SIZE); memcpy(dp, page_address(*pages), len); buflen -= len; dp += len; pages++; } *bufp = tmp; return 0; } /* * Get a user extended attribute name from the XDR buffer. * It will not have the "user." prefix, so prepend it. * Lastly, check for nul characters in the name. */ static __be32 nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep) { char *name, *sp, *dp; u32 namelen, cnt; __be32 *p; if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0) return nfserr_bad_xdr; if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) return nfserr_nametoolong; if (namelen == 0) return nfserr_bad_xdr; p = xdr_inline_decode(argp->xdr, namelen); if (!p) return nfserr_bad_xdr; name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1); if (!name) return nfserr_jukebox; memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); /* * Copy the extended attribute name over while checking for 0 * characters. */ sp = (char *)p; dp = name + XATTR_USER_PREFIX_LEN; cnt = namelen; while (cnt-- > 0) { if (*sp == '\0') return nfserr_bad_xdr; *dp++ = *sp++; } *dp = '\0'; *namep = name; return nfs_ok; } /* * A GETXATTR op request comes without a length specifier. We just set the * maximum length for the reply based on XATTR_SIZE_MAX and the maximum * channel reply size. nfsd_getxattr will probe the length of the xattr, * check it against getxa_len, and allocate + return the value. */ static __be32 nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_getxattr *getxattr = &u->getxattr; __be32 status; u32 maxcount; memset(getxattr, 0, sizeof(*getxattr)); status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name); if (status) return status; maxcount = svc_max_payload(argp->rqstp); maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount); getxattr->getxa_len = maxcount; return nfs_ok; } static __be32 nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_setxattr *setxattr = &u->setxattr; u32 flags, maxcount, size; __be32 status; memset(setxattr, 0, sizeof(*setxattr)); if (xdr_stream_decode_u32(argp->xdr, &flags) < 0) return nfserr_bad_xdr; if (flags > SETXATTR4_REPLACE) return nfserr_inval; setxattr->setxa_flags = flags; status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name); if (status) return status; maxcount = svc_max_payload(argp->rqstp); maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount); if (xdr_stream_decode_u32(argp->xdr, &size) < 0) return nfserr_bad_xdr; if (size > maxcount) return nfserr_xattr2big; setxattr->setxa_len = size; if (size > 0) { struct xdr_buf payload; if (!xdr_stream_subsegment(argp->xdr, &payload, size)) return nfserr_bad_xdr; status = nfsd4_vbuf_from_vector(argp, &payload, &setxattr->setxa_buf, size); } return nfs_ok; } static __be32 nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_listxattrs *listxattrs = &u->listxattrs; u32 maxcount; memset(listxattrs, 0, sizeof(*listxattrs)); if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0) return nfserr_bad_xdr; /* * If the cookie is too large to have even one user.x attribute * plus trailing '\0' left in a maximum size buffer, it's invalid. */ if (listxattrs->lsxa_cookie >= (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2))) return nfserr_badcookie; if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0) return nfserr_bad_xdr; if (maxcount < 8) /* Always need at least 2 words (length and one character) */ return nfserr_inval; maxcount = min(maxcount, svc_max_payload(argp->rqstp)); listxattrs->lsxa_maxcount = maxcount; return nfs_ok; } static __be32 nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_removexattr *removexattr = &u->removexattr; memset(removexattr, 0, sizeof(*removexattr)); return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name); } static __be32 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) { return nfs_ok; } static __be32 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) { return nfserr_notsupp; } typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u); static const nfsd4_dec nfsd4_dec_ops[] = { [OP_ACCESS] = nfsd4_decode_access, [OP_CLOSE] = nfsd4_decode_close, [OP_COMMIT] = nfsd4_decode_commit, [OP_CREATE] = nfsd4_decode_create, [OP_DELEGPURGE] = nfsd4_decode_notsupp, [OP_DELEGRETURN] = nfsd4_decode_delegreturn, [OP_GETATTR] = nfsd4_decode_getattr, [OP_GETFH] = nfsd4_decode_noop, [OP_LINK] = nfsd4_decode_link, [OP_LOCK] = nfsd4_decode_lock, [OP_LOCKT] = nfsd4_decode_lockt, [OP_LOCKU] = nfsd4_decode_locku, [OP_LOOKUP] = nfsd4_decode_lookup, [OP_LOOKUPP] = nfsd4_decode_noop, [OP_NVERIFY] = nfsd4_decode_verify, [OP_OPEN] = nfsd4_decode_open, [OP_OPENATTR] = nfsd4_decode_notsupp, [OP_OPEN_CONFIRM] = nfsd4_decode_open_confirm, [OP_OPEN_DOWNGRADE] = nfsd4_decode_open_downgrade, [OP_PUTFH] = nfsd4_decode_putfh, [OP_PUTPUBFH] = nfsd4_decode_putpubfh, [OP_PUTROOTFH] = nfsd4_decode_noop, [OP_READ] = nfsd4_decode_read, [OP_READDIR] = nfsd4_decode_readdir, [OP_READLINK] = nfsd4_decode_noop, [OP_REMOVE] = nfsd4_decode_remove, [OP_RENAME] = nfsd4_decode_rename, [OP_RENEW] = nfsd4_decode_renew, [OP_RESTOREFH] = nfsd4_decode_noop, [OP_SAVEFH] = nfsd4_decode_noop, [OP_SECINFO] = nfsd4_decode_secinfo, [OP_SETATTR] = nfsd4_decode_setattr, [OP_SETCLIENTID] = nfsd4_decode_setclientid, [OP_SETCLIENTID_CONFIRM] = nfsd4_decode_setclientid_confirm, [OP_VERIFY] = nfsd4_decode_verify, [OP_WRITE] = nfsd4_decode_write, [OP_RELEASE_LOCKOWNER] = nfsd4_decode_release_lockowner, /* new operations for NFSv4.1 */ [OP_BACKCHANNEL_CTL] = nfsd4_decode_backchannel_ctl, [OP_BIND_CONN_TO_SESSION] = nfsd4_decode_bind_conn_to_session, [OP_EXCHANGE_ID] = nfsd4_decode_exchange_id, [OP_CREATE_SESSION] = nfsd4_decode_create_session, [OP_DESTROY_SESSION] = nfsd4_decode_destroy_session, [OP_FREE_STATEID] = nfsd4_decode_free_stateid, [OP_GET_DIR_DELEGATION] = nfsd4_decode_notsupp, #ifdef CONFIG_NFSD_PNFS [OP_GETDEVICEINFO] = nfsd4_decode_getdeviceinfo, [OP_GETDEVICELIST] = nfsd4_decode_notsupp, [OP_LAYOUTCOMMIT] = nfsd4_decode_layoutcommit, [OP_LAYOUTGET] = nfsd4_decode_layoutget, [OP_LAYOUTRETURN] = nfsd4_decode_layoutreturn, #else [OP_GETDEVICEINFO] = nfsd4_decode_notsupp, [OP_GETDEVICELIST] = nfsd4_decode_notsupp, [OP_LAYOUTCOMMIT] = nfsd4_decode_notsupp, [OP_LAYOUTGET] = nfsd4_decode_notsupp, [OP_LAYOUTRETURN] = nfsd4_decode_notsupp, #endif [OP_SECINFO_NO_NAME] = nfsd4_decode_secinfo_no_name, [OP_SEQUENCE] = nfsd4_decode_sequence, [OP_SET_SSV] = nfsd4_decode_notsupp, [OP_TEST_STATEID] = nfsd4_decode_test_stateid, [OP_WANT_DELEGATION] = nfsd4_decode_notsupp, [OP_DESTROY_CLIENTID] = nfsd4_decode_destroy_clientid, [OP_RECLAIM_COMPLETE] = nfsd4_decode_reclaim_complete, /* new operations for NFSv4.2 */ [OP_ALLOCATE] = nfsd4_decode_fallocate, [OP_COPY] = nfsd4_decode_copy, [OP_COPY_NOTIFY] = nfsd4_decode_copy_notify, [OP_DEALLOCATE] = nfsd4_decode_fallocate, [OP_IO_ADVISE] = nfsd4_decode_notsupp, [OP_LAYOUTERROR] = nfsd4_decode_notsupp, [OP_LAYOUTSTATS] = nfsd4_decode_notsupp, [OP_OFFLOAD_CANCEL] = nfsd4_decode_offload_status, [OP_OFFLOAD_STATUS] = nfsd4_decode_offload_status, [OP_READ_PLUS] = nfsd4_decode_read, [OP_SEEK] = nfsd4_decode_seek, [OP_WRITE_SAME] = nfsd4_decode_notsupp, [OP_CLONE] = nfsd4_decode_clone, /* RFC 8276 extended atributes operations */ [OP_GETXATTR] = nfsd4_decode_getxattr, [OP_SETXATTR] = nfsd4_decode_setxattr, [OP_LISTXATTRS] = nfsd4_decode_listxattrs, [OP_REMOVEXATTR] = nfsd4_decode_removexattr, }; static inline bool nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) { if (op->opnum < FIRST_NFS4_OP) return false; else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) return false; else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) return false; else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) return false; return true; } static bool nfsd4_decode_compound(struct nfsd4_compoundargs *argp) { struct nfsd4_op *op; bool cachethis = false; int auth_slack= argp->rqstp->rq_auth_slack; int max_reply = auth_slack + 8; /* opcnt, status */ int readcount = 0; int readbytes = 0; __be32 *p; int i; if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0) return false; max_reply += XDR_UNIT; argp->tag = NULL; if (unlikely(argp->taglen)) { if (argp->taglen > NFSD4_MAX_TAGLEN) return false; p = xdr_inline_decode(argp->xdr, argp->taglen); if (!p) return false; argp->tag = svcxdr_savemem(argp, p, argp->taglen); if (!argp->tag) return false; max_reply += xdr_align_size(argp->taglen); } if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0) return false; if (xdr_stream_decode_u32(argp->xdr, &argp->client_opcnt) < 0) return false; argp->opcnt = min_t(u32, argp->client_opcnt, NFSD_MAX_OPS_PER_COMPOUND); if (argp->opcnt > ARRAY_SIZE(argp->iops)) { argp->ops = vcalloc(argp->opcnt, sizeof(*argp->ops)); if (!argp->ops) { argp->ops = argp->iops; return false; } } if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) argp->opcnt = 0; for (i = 0; i < argp->opcnt; i++) { op = &argp->ops[i]; op->replay = NULL; op->opdesc = NULL; if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0) return false; if (nfsd4_opnum_in_range(argp, op)) { op->opdesc = OPDESC(op); op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); if (op->status != nfs_ok) trace_nfsd_compound_decode_err(argp->rqstp, argp->opcnt, i, op->opnum, op->status); } else { op->opnum = OP_ILLEGAL; op->status = nfserr_op_illegal; } /* * 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); if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) { readcount++; readbytes += nfsd4_max_reply(argp->rqstp, op); } else max_reply += nfsd4_max_reply(argp->rqstp, op); /* * OP_LOCK and OP_LOCKT may return a conflicting lock. * (Special case because it will just skip encoding this * if it runs out of xdr buffer space, and it is the only * operation that behaves this way.) */ if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT) max_reply += NFS4_OPAQUE_LIMIT; if (op->status) { argp->opcnt = i+1; break; } } /* Sessions make the DRC unnecessary: */ if (argp->minorversion) cachethis = false; svc_reserve(argp->rqstp, max_reply + readbytes); argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; argp->splice_ok = nfsd_read_splice_ok(argp->rqstp); if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) argp->splice_ok = false; return true; } static __be32 nfsd4_encode_nfs_fh4(struct xdr_stream *xdr, struct knfsd_fh *fh_handle) { return nfsd4_encode_opaque(xdr, fh_handle->fh_raw, fh_handle->fh_size); } /* This is a frequently-encoded type; open-coded for speed */ static __be32 nfsd4_encode_nfstime4(struct xdr_stream *xdr, const struct timespec64 *tv) { __be32 *p; p = xdr_reserve_space(xdr, XDR_UNIT * 3); if (!p) return nfserr_resource; p = xdr_encode_hyper(p, tv->tv_sec); *p = cpu_to_be32(tv->tv_nsec); return nfs_ok; } static __be32 nfsd4_encode_specdata4(struct xdr_stream *xdr, unsigned int major, unsigned int minor) { __be32 status; status = nfsd4_encode_uint32_t(xdr, major); if (status != nfs_ok) return status; return nfsd4_encode_uint32_t(xdr, minor); } static __be32 nfsd4_encode_change_info4(struct xdr_stream *xdr, const struct nfsd4_change_info *c) { __be32 status; status = nfsd4_encode_bool(xdr, c->atomic); if (status != nfs_ok) return status; status = nfsd4_encode_changeid4(xdr, c->before_change); if (status != nfs_ok) return status; return nfsd4_encode_changeid4(xdr, c->after_change); } static __be32 nfsd4_encode_netaddr4(struct xdr_stream *xdr, const struct nfs42_netaddr *addr) { __be32 status; /* na_r_netid */ status = nfsd4_encode_opaque(xdr, addr->netid, addr->netid_len); if (status != nfs_ok) return status; /* na_r_addr */ return nfsd4_encode_opaque(xdr, addr->addr, addr->addr_len); } /* Encode as an array of strings the string given with components * separated @sep, escaped with esc_enter and esc_exit. */ static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, char *components, char esc_enter, char esc_exit) { __be32 *p; __be32 pathlen; int pathlen_offset; int strlen, count=0; char *str, *end, *next; dprintk("nfsd4_encode_components(%s)\n", components); pathlen_offset = xdr->buf->len; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; p++; /* We will fill this in with @count later */ end = str = components; while (*end) { bool found_esc = false; /* try to parse as esc_start, ..., esc_end, sep */ if (*str == esc_enter) { for (; *end && (*end != esc_exit); end++) /* find esc_exit or end of string */; next = end + 1; if (*end && (!*next || *next == sep)) { str++; found_esc = true; } } if (!found_esc) for (; *end && (*end != sep); end++) /* find sep or end of string */; strlen = end - str; if (strlen) { p = xdr_reserve_space(xdr, strlen + 4); if (!p) return nfserr_resource; p = xdr_encode_opaque(p, str, strlen); count++; } else end++; if (found_esc) end = next; str = end; } pathlen = htonl(count); write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); return 0; } /* Encode as an array of strings the string given with components * separated @sep. */ static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, char *components) { return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); } static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, struct nfsd4_fs_location *location) { __be32 status; status = nfsd4_encode_components_esc(xdr, ':', location->hosts, '[', ']'); if (status) return status; status = nfsd4_encode_components(xdr, '/', location->path); if (status) return status; return nfs_ok; } static __be32 nfsd4_encode_pathname4(struct xdr_stream *xdr, const struct path *root, const struct path *path) { struct path cur = *path; __be32 *p; 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 (path_equal(&cur, root)) 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); } err = nfserr_resource; p = xdr_reserve_space(xdr, 4); if (!p) goto out_free; *p++ = cpu_to_be32(ncomponents); while (ncomponents) { struct dentry *dentry = components[ncomponents - 1]; unsigned int len; spin_lock(&dentry->d_lock); len = dentry->d_name.len; p = xdr_reserve_space(xdr, len + 4); if (!p) { spin_unlock(&dentry->d_lock); goto out_free; } p = xdr_encode_opaque(p, dentry->d_name.name, len); dprintk("/%pd", dentry); spin_unlock(&dentry->d_lock); dput(dentry); ncomponents--; } err = 0; out_free: dprintk(")\n"); while (ncomponents) dput(components[--ncomponents]); kfree(components); path_put(&cur); return err; } static __be32 nfsd4_encode_fs_locations4(struct xdr_stream *xdr, struct svc_rqst *rqstp, struct svc_export *exp) { struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; struct svc_export *exp_ps; unsigned int i; __be32 status; /* fs_root */ exp_ps = rqst_find_fsidzero_export(rqstp); if (IS_ERR(exp_ps)) return nfserrno(PTR_ERR(exp_ps)); status = nfsd4_encode_pathname4(xdr, &exp_ps->ex_path, &exp->ex_path); exp_put(exp_ps); if (status != nfs_ok) return status; /* locations<> */ if (xdr_stream_encode_u32(xdr, fslocs->locations_count) != XDR_UNIT) return nfserr_resource; for (i = 0; i < fslocs->locations_count; i++) { status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); if (status != nfs_ok) return status; } return nfs_ok; } static __be32 nfsd4_encode_nfsace4(struct xdr_stream *xdr, struct svc_rqst *rqstp, struct nfs4_ace *ace) { __be32 status; /* type */ status = nfsd4_encode_acetype4(xdr, ace->type); if (status != nfs_ok) return nfserr_resource; /* flag */ status = nfsd4_encode_aceflag4(xdr, ace->flag); if (status != nfs_ok) return nfserr_resource; /* access mask */ status = nfsd4_encode_acemask4(xdr, ace->access_mask & NFS4_ACE_MASK_ALL); if (status != nfs_ok) return nfserr_resource; /* who */ if (ace->whotype != NFS4_ACL_WHO_NAMED) return nfs4_acl_write_who(xdr, ace->whotype); if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) return nfsd4_encode_group(xdr, rqstp, ace->who_gid); return nfsd4_encode_user(xdr, rqstp, ace->who_uid); } #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 #define WORD2_ABSENT_FS_ATTRS 0 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL static inline __be32 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, void *context, int len) { __be32 *p; p = xdr_reserve_space(xdr, len + 4 + 4 + 4); if (!p) return nfserr_resource; /* * For now we use a 0 here to indicate the null translation; in * the future we may place a call to translation code here. */ *p++ = cpu_to_be32(0); /* lfs */ *p++ = cpu_to_be32(0); /* pi */ p = xdr_encode_opaque(p, context, len); return 0; } #else static inline __be32 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, void *context, int len) { return 0; } #endif static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, 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; *bmval2 &= WORD2_ABSENT_FS_ATTRS; return 0; } static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino) { struct path path = exp->ex_path; struct kstat stat; int err; path_get(&path); while (follow_up(&path)) { if (path.dentry != path.mnt->mnt_root) break; } err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT); path_put(&path); if (!err) *pino = stat.ino; return err; } static __be32 nfsd4_encode_bitmap4(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) { __be32 *p; if (bmval2) { p = xdr_reserve_space(xdr, XDR_UNIT * 4); if (!p) goto out_resource; *p++ = cpu_to_be32(3); *p++ = cpu_to_be32(bmval0); *p++ = cpu_to_be32(bmval1); *p++ = cpu_to_be32(bmval2); } else if (bmval1) { p = xdr_reserve_space(xdr, XDR_UNIT * 3); if (!p) goto out_resource; *p++ = cpu_to_be32(2); *p++ = cpu_to_be32(bmval0); *p++ = cpu_to_be32(bmval1); } else { p = xdr_reserve_space(xdr, XDR_UNIT * 2); if (!p) goto out_resource; *p++ = cpu_to_be32(1); *p++ = cpu_to_be32(bmval0); } return nfs_ok; out_resource: return nfserr_resource; } struct nfsd4_fattr_args { struct svc_rqst *rqstp; struct svc_fh *fhp; struct svc_export *exp; struct dentry *dentry; struct kstat stat; struct kstatfs statfs; struct nfs4_acl *acl; u64 size; #ifdef CONFIG_NFSD_V4_SECURITY_LABEL void *context; int contextlen; #endif u32 rdattr_err; bool contextsupport; bool ignore_crossmnt; }; typedef __be32(*nfsd4_enc_attr)(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args); static __be32 nfsd4_encode_fattr4__noop(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfs_ok; } static __be32 nfsd4_encode_fattr4__true(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_bool(xdr, true); } static __be32 nfsd4_encode_fattr4__false(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_bool(xdr, false); } static __be32 nfsd4_encode_fattr4_supported_attrs(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { struct nfsd4_compoundres *resp = args->rqstp->rq_resp; u32 minorversion = resp->cstate.minorversion; u32 supp[3]; memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); if (!IS_POSIXACL(d_inode(args->dentry))) supp[0] &= ~FATTR4_WORD0_ACL; if (!args->contextsupport) supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; return nfsd4_encode_bitmap4(xdr, supp[0], supp[1], supp[2]); } static __be32 nfsd4_encode_fattr4_type(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { __be32 *p; p = xdr_reserve_space(xdr, XDR_UNIT); if (!p) return nfserr_resource; switch (args->stat.mode & S_IFMT) { case S_IFIFO: *p = cpu_to_be32(NF4FIFO); break; case S_IFCHR: *p = cpu_to_be32(NF4CHR); break; case S_IFDIR: *p = cpu_to_be32(NF4DIR); break; case S_IFBLK: *p = cpu_to_be32(NF4BLK); break; case S_IFLNK: *p = cpu_to_be32(NF4LNK); break; case S_IFREG: *p = cpu_to_be32(NF4REG); break; case S_IFSOCK: *p = cpu_to_be32(NF4SOCK); break; default: return nfserr_serverfault; } return nfs_ok; } static __be32 nfsd4_encode_fattr4_fh_expire_type(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { u32 mask; mask = NFS4_FH_PERSISTENT; if (!(args->exp->ex_flags & NFSEXP_NOSUBTREECHECK)) mask |= NFS4_FH_VOL_RENAME; return nfsd4_encode_uint32_t(xdr, mask); } static __be32 nfsd4_encode_fattr4_change(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { const struct svc_export *exp = args->exp; u64 c; if (unlikely(exp->ex_flags & NFSEXP_V4ROOT)) { u32 flush_time = convert_to_wallclock(exp->cd->flush_time); if (xdr_stream_encode_u32(xdr, flush_time) != XDR_UNIT) return nfserr_resource; if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT) return nfserr_resource; return nfs_ok; } c = nfsd4_change_attribute(&args->stat, d_inode(args->dentry)); return nfsd4_encode_changeid4(xdr, c); } static __be32 nfsd4_encode_fattr4_size(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint64_t(xdr, args->size); } static __be32 nfsd4_encode_fattr4_fsid(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { __be32 *p; p = xdr_reserve_space(xdr, XDR_UNIT * 2 + XDR_UNIT * 2); if (!p) return nfserr_resource; if (unlikely(args->exp->ex_fslocs.migrated)) { p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); return nfs_ok; } switch (fsid_source(args->fhp)) { case FSIDSOURCE_FSID: p = xdr_encode_hyper(p, (u64)args->exp->ex_fsid); xdr_encode_hyper(p, (u64)0); break; case FSIDSOURCE_DEV: *p++ = xdr_zero; *p++ = cpu_to_be32(MAJOR(args->stat.dev)); *p++ = xdr_zero; *p = cpu_to_be32(MINOR(args->stat.dev)); break; case FSIDSOURCE_UUID: xdr_encode_opaque_fixed(p, args->exp->ex_uuid, EX_UUID_LEN); break; } return nfs_ok; } static __be32 nfsd4_encode_fattr4_lease_time(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { struct nfsd_net *nn = net_generic(SVC_NET(args->rqstp), nfsd_net_id); return nfsd4_encode_nfs_lease4(xdr, nn->nfsd4_lease); } static __be32 nfsd4_encode_fattr4_rdattr_error(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint32_t(xdr, args->rdattr_err); } static __be32 nfsd4_encode_fattr4_aclsupport(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { u32 mask; mask = 0; if (IS_POSIXACL(d_inode(args->dentry))) mask = ACL4_SUPPORT_ALLOW_ACL | ACL4_SUPPORT_DENY_ACL; return nfsd4_encode_uint32_t(xdr, mask); } static __be32 nfsd4_encode_fattr4_acl(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { struct nfs4_acl *acl = args->acl; struct nfs4_ace *ace; __be32 status; /* nfsace4<> */ if (!acl) { if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT) return nfserr_resource; } else { if (xdr_stream_encode_u32(xdr, acl->naces) != XDR_UNIT) return nfserr_resource; for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { status = nfsd4_encode_nfsace4(xdr, args->rqstp, ace); if (status != nfs_ok) return status; } } return nfs_ok; } static __be32 nfsd4_encode_fattr4_filehandle(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_nfs_fh4(xdr, &args->fhp->fh_handle); } static __be32 nfsd4_encode_fattr4_fileid(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint64_t(xdr, args->stat.ino); } static __be32 nfsd4_encode_fattr4_files_avail(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint64_t(xdr, args->statfs.f_ffree); } static __be32 nfsd4_encode_fattr4_files_free(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint64_t(xdr, args->statfs.f_ffree); } static __be32 nfsd4_encode_fattr4_files_total(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint64_t(xdr, args->statfs.f_files); } static __be32 nfsd4_encode_fattr4_fs_locations(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_fs_locations4(xdr, args->rqstp, args->exp); } static __be32 nfsd4_encode_fattr4_maxfilesize(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { struct super_block *sb = args->exp->ex_path.mnt->mnt_sb; return nfsd4_encode_uint64_t(xdr, sb->s_maxbytes); } static __be32 nfsd4_encode_fattr4_maxlink(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint32_t(xdr, 255); } static __be32 nfsd4_encode_fattr4_maxname(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint32_t(xdr, args->statfs.f_namelen); } static __be32 nfsd4_encode_fattr4_maxread(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp)); } static __be32 nfsd4_encode_fattr4_maxwrite(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp)); } static __be32 nfsd4_encode_fattr4_mode(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_mode4(xdr, args->stat.mode & S_IALLUGO); } static __be32 nfsd4_encode_fattr4_numlinks(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint32_t(xdr, args->stat.nlink); } static __be32 nfsd4_encode_fattr4_owner(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_user(xdr, args->rqstp, args->stat.uid); } static __be32 nfsd4_encode_fattr4_owner_group(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_group(xdr, args->rqstp, args->stat.gid); } static __be32 nfsd4_encode_fattr4_rawdev(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_specdata4(xdr, MAJOR(args->stat.rdev), MINOR(args->stat.rdev)); } static __be32 nfsd4_encode_fattr4_space_avail(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { u64 avail = (u64)args->statfs.f_bavail * (u64)args->statfs.f_bsize; return nfsd4_encode_uint64_t(xdr, avail); } static __be32 nfsd4_encode_fattr4_space_free(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { u64 free = (u64)args->statfs.f_bfree * (u64)args->statfs.f_bsize; return nfsd4_encode_uint64_t(xdr, free); } static __be32 nfsd4_encode_fattr4_space_total(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { u64 total = (u64)args->statfs.f_blocks * (u64)args->statfs.f_bsize; return nfsd4_encode_uint64_t(xdr, total); } static __be32 nfsd4_encode_fattr4_space_used(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint64_t(xdr, (u64)args->stat.blocks << 9); } static __be32 nfsd4_encode_fattr4_time_access(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_nfstime4(xdr, &args->stat.atime); } static __be32 nfsd4_encode_fattr4_time_create(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_nfstime4(xdr, &args->stat.btime); } /* * ctime (in NFSv4, time_metadata) is not writeable, and the client * doesn't really care what resolution could theoretically be stored by * the filesystem. * * The client cares how close together changes can be while still * guaranteeing ctime changes. For most filesystems (which have * timestamps with nanosecond fields) that is limited by the resolution * of the time returned from current_time() (which I'm assuming to be * 1/HZ). */ static __be32 nfsd4_encode_fattr4_time_delta(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { const struct inode *inode = d_inode(args->dentry); u32 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran); struct timespec64 ts = ns_to_timespec64(ns); return nfsd4_encode_nfstime4(xdr, &ts); } static __be32 nfsd4_encode_fattr4_time_metadata(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_nfstime4(xdr, &args->stat.ctime); } static __be32 nfsd4_encode_fattr4_time_modify(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_nfstime4(xdr, &args->stat.mtime); } static __be32 nfsd4_encode_fattr4_mounted_on_fileid(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { u64 ino; int err; if (!args->ignore_crossmnt && args->dentry == args->exp->ex_path.mnt->mnt_root) { err = nfsd4_get_mounted_on_ino(args->exp, &ino); if (err) return nfserrno(err); } else ino = args->stat.ino; return nfsd4_encode_uint64_t(xdr, ino); } #ifdef CONFIG_NFSD_PNFS static __be32 nfsd4_encode_fattr4_fs_layout_types(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { unsigned long mask = args->exp->ex_layout_types; int i; /* Hamming weight of @mask is the number of layout types to return */ if (xdr_stream_encode_u32(xdr, hweight_long(mask)) != XDR_UNIT) return nfserr_resource; for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) if (mask & BIT(i)) { /* layouttype4 */ if (xdr_stream_encode_u32(xdr, i) != XDR_UNIT) return nfserr_resource; } return nfs_ok; } static __be32 nfsd4_encode_fattr4_layout_types(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { unsigned long mask = args->exp->ex_layout_types; int i; /* Hamming weight of @mask is the number of layout types to return */ if (xdr_stream_encode_u32(xdr, hweight_long(mask)) != XDR_UNIT) return nfserr_resource; for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) if (mask & BIT(i)) { /* layouttype4 */ if (xdr_stream_encode_u32(xdr, i) != XDR_UNIT) return nfserr_resource; } return nfs_ok; } static __be32 nfsd4_encode_fattr4_layout_blksize(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_uint32_t(xdr, args->stat.blksize); } #endif static __be32 nfsd4_encode_fattr4_suppattr_exclcreat(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { struct nfsd4_compoundres *resp = args->rqstp->rq_resp; u32 supp[3]; memcpy(supp, nfsd_suppattrs[resp->cstate.minorversion], sizeof(supp)); supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0; supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1; supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2; return nfsd4_encode_bitmap4(xdr, supp[0], supp[1], supp[2]); } #ifdef CONFIG_NFSD_V4_SECURITY_LABEL static __be32 nfsd4_encode_fattr4_sec_label(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { return nfsd4_encode_security_label(xdr, args->rqstp, args->context, args->contextlen); } #endif static __be32 nfsd4_encode_fattr4_xattr_support(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { int err = xattr_supports_user_prefix(d_inode(args->dentry)); return nfsd4_encode_bool(xdr, err == 0); } static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = { [FATTR4_SUPPORTED_ATTRS] = nfsd4_encode_fattr4_supported_attrs, [FATTR4_TYPE] = nfsd4_encode_fattr4_type, [FATTR4_FH_EXPIRE_TYPE] = nfsd4_encode_fattr4_fh_expire_type, [FATTR4_CHANGE] = nfsd4_encode_fattr4_change, [FATTR4_SIZE] = nfsd4_encode_fattr4_size, [FATTR4_LINK_SUPPORT] = nfsd4_encode_fattr4__true, [FATTR4_SYMLINK_SUPPORT] = nfsd4_encode_fattr4__true, [FATTR4_NAMED_ATTR] = nfsd4_encode_fattr4__false, [FATTR4_FSID] = nfsd4_encode_fattr4_fsid, [FATTR4_UNIQUE_HANDLES] = nfsd4_encode_fattr4__true, [FATTR4_LEASE_TIME] = nfsd4_encode_fattr4_lease_time, [FATTR4_RDATTR_ERROR] = nfsd4_encode_fattr4_rdattr_error, [FATTR4_ACL] = nfsd4_encode_fattr4_acl, [FATTR4_ACLSUPPORT] = nfsd4_encode_fattr4_aclsupport, [FATTR4_ARCHIVE] = nfsd4_encode_fattr4__noop, [FATTR4_CANSETTIME] = nfsd4_encode_fattr4__true, [FATTR4_CASE_INSENSITIVE] = nfsd4_encode_fattr4__false, [FATTR4_CASE_PRESERVING] = nfsd4_encode_fattr4__true, [FATTR4_CHOWN_RESTRICTED] = nfsd4_encode_fattr4__true, [FATTR4_FILEHANDLE] = nfsd4_encode_fattr4_filehandle, [FATTR4_FILEID] = nfsd4_encode_fattr4_fileid, [FATTR4_FILES_AVAIL] = nfsd4_encode_fattr4_files_avail, [FATTR4_FILES_FREE] = nfsd4_encode_fattr4_files_free, [FATTR4_FILES_TOTAL] = nfsd4_encode_fattr4_files_total, [FATTR4_FS_LOCATIONS] = nfsd4_encode_fattr4_fs_locations, [FATTR4_HIDDEN] = nfsd4_encode_fattr4__noop, [FATTR4_HOMOGENEOUS] = nfsd4_encode_fattr4__true, [FATTR4_MAXFILESIZE] = nfsd4_encode_fattr4_maxfilesize, [FATTR4_MAXLINK] = nfsd4_encode_fattr4_maxlink, [FATTR4_MAXNAME] = nfsd4_encode_fattr4_maxname, [FATTR4_MAXREAD] = nfsd4_encode_fattr4_maxread, [FATTR4_MAXWRITE] = nfsd4_encode_fattr4_maxwrite, [FATTR4_MIMETYPE] = nfsd4_encode_fattr4__noop, [FATTR4_MODE] = nfsd4_encode_fattr4_mode, [FATTR4_NO_TRUNC] = nfsd4_encode_fattr4__true, [FATTR4_NUMLINKS] = nfsd4_encode_fattr4_numlinks, [FATTR4_OWNER] = nfsd4_encode_fattr4_owner, [FATTR4_OWNER_GROUP] = nfsd4_encode_fattr4_owner_group, [FATTR4_QUOTA_AVAIL_HARD] = nfsd4_encode_fattr4__noop, [FATTR4_QUOTA_AVAIL_SOFT] = nfsd4_encode_fattr4__noop, [FATTR4_QUOTA_USED] = nfsd4_encode_fattr4__noop, [FATTR4_RAWDEV] = nfsd4_encode_fattr4_rawdev, [FATTR4_SPACE_AVAIL] = nfsd4_encode_fattr4_space_avail, [FATTR4_SPACE_FREE] = nfsd4_encode_fattr4_space_free, [FATTR4_SPACE_TOTAL] = nfsd4_encode_fattr4_space_total, [FATTR4_SPACE_USED] = nfsd4_encode_fattr4_space_used, [FATTR4_SYSTEM] = nfsd4_encode_fattr4__noop, [FATTR4_TIME_ACCESS] = nfsd4_encode_fattr4_time_access, [FATTR4_TIME_ACCESS_SET] = nfsd4_encode_fattr4__noop, [FATTR4_TIME_BACKUP] = nfsd4_encode_fattr4__noop, [FATTR4_TIME_CREATE] = nfsd4_encode_fattr4_time_create, [FATTR4_TIME_DELTA] = nfsd4_encode_fattr4_time_delta, [FATTR4_TIME_METADATA] = nfsd4_encode_fattr4_time_metadata, [FATTR4_TIME_MODIFY] = nfsd4_encode_fattr4_time_modify, [FATTR4_TIME_MODIFY_SET] = nfsd4_encode_fattr4__noop, [FATTR4_MOUNTED_ON_FILEID] = nfsd4_encode_fattr4_mounted_on_fileid, [FATTR4_DIR_NOTIF_DELAY] = nfsd4_encode_fattr4__noop, [FATTR4_DIRENT_NOTIF_DELAY] = nfsd4_encode_fattr4__noop, [FATTR4_DACL] = nfsd4_encode_fattr4__noop, [FATTR4_SACL] = nfsd4_encode_fattr4__noop, [FATTR4_CHANGE_POLICY] = nfsd4_encode_fattr4__noop, [FATTR4_FS_STATUS] = nfsd4_encode_fattr4__noop, #ifdef CONFIG_NFSD_PNFS [FATTR4_FS_LAYOUT_TYPES] = nfsd4_encode_fattr4_fs_layout_types, [FATTR4_LAYOUT_HINT] = nfsd4_encode_fattr4__noop, [FATTR4_LAYOUT_TYPES] = nfsd4_encode_fattr4_layout_types, [FATTR4_LAYOUT_BLKSIZE] = nfsd4_encode_fattr4_layout_blksize, [FATTR4_LAYOUT_ALIGNMENT] = nfsd4_encode_fattr4__noop, #else [FATTR4_FS_LAYOUT_TYPES] = nfsd4_encode_fattr4__noop, [FATTR4_LAYOUT_HINT] = nfsd4_encode_fattr4__noop, [FATTR4_LAYOUT_TYPES] = nfsd4_encode_fattr4__noop, [FATTR4_LAYOUT_BLKSIZE] = nfsd4_encode_fattr4__noop, [FATTR4_LAYOUT_ALIGNMENT] = nfsd4_encode_fattr4__noop, #endif [FATTR4_FS_LOCATIONS_INFO] = nfsd4_encode_fattr4__noop, [FATTR4_MDSTHRESHOLD] = nfsd4_encode_fattr4__noop, [FATTR4_RETENTION_GET] = nfsd4_encode_fattr4__noop, [FATTR4_RETENTION_SET] = nfsd4_encode_fattr4__noop, [FATTR4_RETENTEVT_GET] = nfsd4_encode_fattr4__noop, [FATTR4_RETENTEVT_SET] = nfsd4_encode_fattr4__noop, [FATTR4_RETENTION_HOLD] = nfsd4_encode_fattr4__noop, [FATTR4_MODE_SET_MASKED] = nfsd4_encode_fattr4__noop, [FATTR4_SUPPATTR_EXCLCREAT] = nfsd4_encode_fattr4_suppattr_exclcreat, [FATTR4_FS_CHARSET_CAP] = nfsd4_encode_fattr4__noop, [FATTR4_CLONE_BLKSIZE] = nfsd4_encode_fattr4__noop, [FATTR4_SPACE_FREED] = nfsd4_encode_fattr4__noop, [FATTR4_CHANGE_ATTR_TYPE] = nfsd4_encode_fattr4__noop, #ifdef CONFIG_NFSD_V4_SECURITY_LABEL [FATTR4_SEC_LABEL] = nfsd4_encode_fattr4_sec_label, #else [FATTR4_SEC_LABEL] = nfsd4_encode_fattr4__noop, #endif [FATTR4_MODE_UMASK] = nfsd4_encode_fattr4__noop, [FATTR4_XATTR_SUPPORT] = nfsd4_encode_fattr4_xattr_support, }; /* * Note: @fhp can be NULL; in this case, we might have to compose the filehandle * ourselves. */ static __be32 nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, const u32 *bmval, int ignore_crossmnt) { struct nfsd4_fattr_args args; struct svc_fh *tempfh = NULL; int starting_len = xdr->buf->len; __be32 *attrlen_p, status; int attrlen_offset; int err; struct nfsd4_compoundres *resp = rqstp->rq_resp; u32 minorversion = resp->cstate.minorversion; struct path path = { .mnt = exp->ex_path.mnt, .dentry = dentry, }; union { u32 attrmask[3]; unsigned long mask[2]; } u; unsigned long bit; WARN_ON_ONCE(bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1); WARN_ON_ONCE(!nfsd_attrs_supported(minorversion, bmval)); args.rqstp = rqstp; args.exp = exp; args.dentry = dentry; args.ignore_crossmnt = (ignore_crossmnt != 0); /* * Make a local copy of the attribute bitmap that can be modified. */ memset(&u, 0, sizeof(u)); u.attrmask[0] = bmval[0]; u.attrmask[1] = bmval[1]; u.attrmask[2] = bmval[2]; args.rdattr_err = 0; if (exp->ex_fslocs.migrated) { status = fattr_handle_absent_fs(&u.attrmask[0], &u.attrmask[1], &u.attrmask[2], &args.rdattr_err); if (status) goto out; } args.size = 0; if (u.attrmask[0] & (FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE)) { status = nfsd4_deleg_getattr_conflict(rqstp, d_inode(dentry)); if (status) goto out; } err = vfs_getattr(&path, &args.stat, STATX_BASIC_STATS | STATX_BTIME | STATX_CHANGE_COOKIE, AT_STATX_SYNC_AS_STAT); if (err) goto out_nfserr; args.size = args.stat.size; if (!(args.stat.result_mask & STATX_BTIME)) /* underlying FS does not offer btime so we can't share it */ u.attrmask[1] &= ~FATTR4_WORD1_TIME_CREATE; if ((u.attrmask[0] & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || (u.attrmask[1] & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL))) { err = vfs_statfs(&path, &args.statfs); if (err) goto out_nfserr; } if ((u.attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); status = nfserr_jukebox; if (!tempfh) goto out; fh_init(tempfh, NFS4_FHSIZE); status = fh_compose(tempfh, exp, dentry, NULL); if (status) goto out; args.fhp = tempfh; } else args.fhp = fhp; args.acl = NULL; if (u.attrmask[0] & FATTR4_WORD0_ACL) { err = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl); if (err == -EOPNOTSUPP) u.attrmask[0] &= ~FATTR4_WORD0_ACL; else if (err == -EINVAL) { status = nfserr_attrnotsupp; goto out; } else if (err != 0) goto out_nfserr; } args.contextsupport = false; #ifdef CONFIG_NFSD_V4_SECURITY_LABEL args.context = NULL; if ((u.attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) || u.attrmask[0] & FATTR4_WORD0_SUPPORTED_ATTRS) { if (exp->ex_flags & NFSEXP_SECURITY_LABEL) err = security_inode_getsecctx(d_inode(dentry), &args.context, &args.contextlen); else err = -EOPNOTSUPP; args.contextsupport = (err == 0); if (u.attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) { if (err == -EOPNOTSUPP) u.attrmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL; else if (err) goto out_nfserr; } } #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ /* attrmask */ status = nfsd4_encode_bitmap4(xdr, u.attrmask[0], u.attrmask[1], u.attrmask[2]); if (status) goto out; /* attr_vals */ attrlen_offset = xdr->buf->len; attrlen_p = xdr_reserve_space(xdr, XDR_UNIT); if (!attrlen_p) goto out_resource; for_each_set_bit(bit, (const unsigned long *)&u.mask, ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops)) { status = nfsd4_enc_fattr4_encode_ops[bit](xdr, &args); if (status != nfs_ok) goto out; } *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT); status = nfs_ok; out: #ifdef CONFIG_NFSD_V4_SECURITY_LABEL if (args.context) security_release_secctx(args.context, args.contextlen); #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ kfree(args.acl); if (tempfh) { fh_put(tempfh); kfree(tempfh); } if (status) xdr_truncate_encode(xdr, starting_len); return status; out_nfserr: status = nfserrno(err); goto out; out_resource: status = nfserr_resource; goto out; } static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p, int bytes) { xdr->scratch.iov_len = 0; memset(buf, 0, sizeof(struct xdr_buf)); buf->head[0].iov_base = p; buf->head[0].iov_len = 0; buf->len = 0; xdr->buf = buf; xdr->iov = buf->head; xdr->p = p; xdr->end = (void *)p + bytes; buf->buflen = bytes; } __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, u32 *bmval, struct svc_rqst *rqstp, int ignore_crossmnt) { struct xdr_buf dummy; struct xdr_stream xdr; __be32 ret; svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); ret = nfsd4_encode_fattr4(rqstp, &xdr, fhp, exp, dentry, bmval, ignore_crossmnt); *p = xdr.p; return ret; } /* * The buffer space for this field was reserved during a previous * call to nfsd4_encode_entry4(). */ static void nfsd4_encode_entry4_nfs_cookie4(const struct nfsd4_readdir *readdir, u64 offset) { __be64 cookie = cpu_to_be64(offset); struct xdr_stream *xdr = readdir->xdr; if (!readdir->cookie_offset) return; write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, &cookie, sizeof(cookie)); } 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_entry4_fattr(struct nfsd4_readdir *cd, const char *name, int namlen) { struct svc_export *exp = cd->rd_fhp->fh_export; struct dentry *dentry; __be32 nfserr; int ignore_crossmnt = 0; dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen); if (IS_ERR(dentry)) return nfserrno(PTR_ERR(dentry)); 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_fattr4(cd->rd_rqstp, cd->xdr, NULL, exp, dentry, cd->rd_bmval, ignore_crossmnt); out_put: dput(dentry); exp_put(exp); return nfserr; } static __be32 nfsd4_encode_entry4_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) { __be32 status; /* attrmask */ status = nfsd4_encode_bitmap4(xdr, FATTR4_WORD0_RDATTR_ERROR, 0, 0); if (status != nfs_ok) return status; /* attr_vals */ if (xdr_stream_encode_u32(xdr, XDR_UNIT) != XDR_UNIT) return nfserr_resource; /* rdattr_error */ if (xdr_stream_encode_be32(xdr, nfserr) != XDR_UNIT) return nfserr_resource; return nfs_ok; } static int nfsd4_encode_entry4(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); struct xdr_stream *xdr = cd->xdr; int start_offset = xdr->buf->len; int cookie_offset; u32 name_and_cookie; int entry_bytes; __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; } /* Encode the previous entry's cookie value */ nfsd4_encode_entry4_nfs_cookie4(cd, offset); if (xdr_stream_encode_item_present(xdr) != XDR_UNIT) goto fail; /* Reserve send buffer space for this entry's cookie value. */ cookie_offset = xdr->buf->len; if (nfsd4_encode_nfs_cookie4(xdr, OFFSET_MAX) != nfs_ok) goto fail; if (nfsd4_encode_component4(xdr, name, namlen) != nfs_ok) goto fail; nfserr = nfsd4_encode_entry4_fattr(cd, name, namlen); switch (nfserr) { case nfs_ok: break; case nfserr_resource: nfserr = nfserr_toosmall; goto fail; case nfserr_noent: xdr_truncate_encode(xdr, start_offset); goto skip_entry; case nfserr_jukebox: /* * The pseudoroot should only display dentries that lead to * exports. If we get EJUKEBOX here, then we can't tell whether * this entry should be included. Just fail the whole READDIR * with NFS4ERR_DELAY in that case, and hope that the situation * will resolve itself by the client's next attempt. */ if (cd->rd_fhp->fh_export->ex_flags & NFSEXP_V4ROOT) goto fail; fallthrough; 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; if (nfsd4_encode_entry4_rdattr_error(xdr, nfserr)) { nfserr = nfserr_toosmall; goto fail; } } nfserr = nfserr_toosmall; entry_bytes = xdr->buf->len - start_offset; if (entry_bytes > cd->rd_maxcount) goto fail; cd->rd_maxcount -= entry_bytes; /* * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and * notes that it could be zero. If it is zero, then the server * should enforce only the rd_maxcount value. */ if (cd->rd_dircount) { name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) goto fail; cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); if (!cd->rd_dircount) cd->rd_maxcount = 0; } cd->cookie_offset = cookie_offset; skip_entry: cd->common.err = nfs_ok; return 0; fail: xdr_truncate_encode(xdr, start_offset); cd->common.err = nfserr; return -EINVAL; } static __be32 nfsd4_encode_verifier4(struct xdr_stream *xdr, const nfs4_verifier *verf) { __be32 *p; p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); if (!p) return nfserr_resource; memcpy(p, verf->data, sizeof(verf->data)); return nfs_ok; } static __be32 nfsd4_encode_clientid4(struct xdr_stream *xdr, const clientid_t *clientid) { __be32 *p; p = xdr_reserve_space(xdr, sizeof(__be64)); if (!p) return nfserr_resource; memcpy(p, clientid, sizeof(*clientid)); return nfs_ok; } /* This is a frequently-encoded item; open-coded for speed */ static __be32 nfsd4_encode_stateid4(struct xdr_stream *xdr, const stateid_t *sid) { __be32 *p; p = xdr_reserve_space(xdr, NFS4_STATEID_SIZE); if (!p) return nfserr_resource; *p++ = cpu_to_be32(sid->si_generation); memcpy(p, &sid->si_opaque, sizeof(sid->si_opaque)); return nfs_ok; } static __be32 nfsd4_encode_sessionid4(struct xdr_stream *xdr, const struct nfs4_sessionid *sessionid) { return nfsd4_encode_opaque_fixed(xdr, sessionid->data, NFS4_MAX_SESSIONID_LEN); } static __be32 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_access *access = &u->access; struct xdr_stream *xdr = resp->xdr; __be32 status; /* supported */ status = nfsd4_encode_uint32_t(xdr, access->ac_supported); if (status != nfs_ok) return status; /* access */ return nfsd4_encode_uint32_t(xdr, access->ac_resp_access); } static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; struct xdr_stream *xdr = resp->xdr; /* bctsr_sessid */ nfserr = nfsd4_encode_sessionid4(xdr, &bcts->sessionid); if (nfserr != nfs_ok) return nfserr; /* bctsr_dir */ if (xdr_stream_encode_u32(xdr, bcts->dir) != XDR_UNIT) return nfserr_resource; /* bctsr_use_conn_in_rdma_mode */ return nfsd4_encode_bool(xdr, false); } static __be32 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_close *close = &u->close; struct xdr_stream *xdr = resp->xdr; /* open_stateid */ return nfsd4_encode_stateid4(xdr, &close->cl_stateid); } static __be32 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_commit *commit = &u->commit; return nfsd4_encode_verifier4(resp->xdr, &commit->co_verf); } static __be32 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_create *create = &u->create; struct xdr_stream *xdr = resp->xdr; /* cinfo */ nfserr = nfsd4_encode_change_info4(xdr, &create->cr_cinfo); if (nfserr) return nfserr; /* attrset */ return nfsd4_encode_bitmap4(xdr, create->cr_bmval[0], create->cr_bmval[1], create->cr_bmval[2]); } static __be32 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_getattr *getattr = &u->getattr; struct svc_fh *fhp = getattr->ga_fhp; struct xdr_stream *xdr = resp->xdr; /* obj_attributes */ return nfsd4_encode_fattr4(resp->rqstp, xdr, fhp, fhp->fh_export, fhp->fh_dentry, getattr->ga_bmval, 0); } static __be32 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct xdr_stream *xdr = resp->xdr; struct svc_fh *fhp = u->getfh; /* object */ return nfsd4_encode_nfs_fh4(xdr, &fhp->fh_handle); } static __be32 nfsd4_encode_lock_owner4(struct xdr_stream *xdr, const clientid_t *clientid, const struct xdr_netobj *owner) { __be32 status; /* clientid */ status = nfsd4_encode_clientid4(xdr, clientid); if (status != nfs_ok) return status; /* owner */ return nfsd4_encode_opaque(xdr, owner->data, owner->len); } static __be32 nfsd4_encode_lock4denied(struct xdr_stream *xdr, const struct nfsd4_lock_denied *ld) { __be32 status; /* offset */ status = nfsd4_encode_offset4(xdr, ld->ld_start); if (status != nfs_ok) return status; /* length */ status = nfsd4_encode_length4(xdr, ld->ld_length); if (status != nfs_ok) return status; /* locktype */ if (xdr_stream_encode_u32(xdr, ld->ld_type) != XDR_UNIT) return nfserr_resource; /* owner */ return nfsd4_encode_lock_owner4(xdr, &ld->ld_clientid, &ld->ld_owner); } static __be32 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_lock *lock = &u->lock; struct xdr_stream *xdr = resp->xdr; __be32 status; switch (nfserr) { case nfs_ok: /* resok4 */ status = nfsd4_encode_stateid4(xdr, &lock->lk_resp_stateid); break; case nfserr_denied: /* denied */ status = nfsd4_encode_lock4denied(xdr, &lock->lk_denied); break; default: return nfserr; } return status != nfs_ok ? status : nfserr; } static __be32 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_lockt *lockt = &u->lockt; struct xdr_stream *xdr = resp->xdr; __be32 status; if (nfserr == nfserr_denied) { /* denied */ status = nfsd4_encode_lock4denied(xdr, &lockt->lt_denied); if (status != nfs_ok) return status; } return nfserr; } static __be32 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_locku *locku = &u->locku; struct xdr_stream *xdr = resp->xdr; /* lock_stateid */ return nfsd4_encode_stateid4(xdr, &locku->lu_stateid); } static __be32 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_link *link = &u->link; struct xdr_stream *xdr = resp->xdr; return nfsd4_encode_change_info4(xdr, &link->li_cinfo); } /* * This implementation does not yet support returning an ACE in an * OPEN that offers a delegation. */ static __be32 nfsd4_encode_open_nfsace4(struct xdr_stream *xdr) { __be32 status; /* type */ status = nfsd4_encode_acetype4(xdr, NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); if (status != nfs_ok) return nfserr_resource; /* flag */ status = nfsd4_encode_aceflag4(xdr, 0); if (status != nfs_ok) return nfserr_resource; /* access mask */ status = nfsd4_encode_acemask4(xdr, 0); if (status != nfs_ok) return nfserr_resource; /* who - empty for now */ if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT) return nfserr_resource; return nfs_ok; } static __be32 nfsd4_encode_open_read_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open) { __be32 status; /* stateid */ status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid); if (status != nfs_ok) return status; /* recall */ status = nfsd4_encode_bool(xdr, open->op_recall); if (status != nfs_ok) return status; /* permissions */ return nfsd4_encode_open_nfsace4(xdr); } static __be32 nfsd4_encode_nfs_space_limit4(struct xdr_stream *xdr, u64 filesize) { /* limitby */ if (xdr_stream_encode_u32(xdr, NFS4_LIMIT_SIZE) != XDR_UNIT) return nfserr_resource; /* filesize */ return nfsd4_encode_uint64_t(xdr, filesize); } static __be32 nfsd4_encode_open_write_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open) { __be32 status; /* stateid */ status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid); if (status != nfs_ok) return status; /* recall */ status = nfsd4_encode_bool(xdr, open->op_recall); if (status != nfs_ok) return status; /* space_limit */ status = nfsd4_encode_nfs_space_limit4(xdr, 0); if (status != nfs_ok) return status; return nfsd4_encode_open_nfsace4(xdr); } static __be32 nfsd4_encode_open_none_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open) { __be32 status = nfs_ok; /* ond_why */ if (xdr_stream_encode_u32(xdr, open->op_why_no_deleg) != XDR_UNIT) return nfserr_resource; switch (open->op_why_no_deleg) { case WND4_CONTENTION: /* ond_server_will_push_deleg */ status = nfsd4_encode_bool(xdr, false); break; case WND4_RESOURCE: /* ond_server_will_signal_avail */ status = nfsd4_encode_bool(xdr, false); } return status; } static __be32 nfsd4_encode_open_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open) { __be32 status; /* delegation_type */ if (xdr_stream_encode_u32(xdr, open->op_delegate_type) != XDR_UNIT) return nfserr_resource; switch (open->op_delegate_type) { case NFS4_OPEN_DELEGATE_NONE: status = nfs_ok; break; case NFS4_OPEN_DELEGATE_READ: /* read */ status = nfsd4_encode_open_read_delegation4(xdr, open); break; case NFS4_OPEN_DELEGATE_WRITE: /* write */ status = nfsd4_encode_open_write_delegation4(xdr, open); break; case NFS4_OPEN_DELEGATE_NONE_EXT: /* od_whynone */ status = nfsd4_encode_open_none_delegation4(xdr, open); break; default: status = nfserr_serverfault; } return status; } static __be32 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_open *open = &u->open; struct xdr_stream *xdr = resp->xdr; /* stateid */ nfserr = nfsd4_encode_stateid4(xdr, &open->op_stateid); if (nfserr != nfs_ok) return nfserr; /* cinfo */ nfserr = nfsd4_encode_change_info4(xdr, &open->op_cinfo); if (nfserr != nfs_ok) return nfserr; /* rflags */ nfserr = nfsd4_encode_uint32_t(xdr, open->op_rflags); if (nfserr != nfs_ok) return nfserr; /* attrset */ nfserr = nfsd4_encode_bitmap4(xdr, open->op_bmval[0], open->op_bmval[1], open->op_bmval[2]); if (nfserr != nfs_ok) return nfserr; /* delegation */ return nfsd4_encode_open_delegation4(xdr, open); } static __be32 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_open_confirm *oc = &u->open_confirm; struct xdr_stream *xdr = resp->xdr; /* open_stateid */ return nfsd4_encode_stateid4(xdr, &oc->oc_resp_stateid); } static __be32 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_open_downgrade *od = &u->open_downgrade; struct xdr_stream *xdr = resp->xdr; /* open_stateid */ return nfsd4_encode_stateid4(xdr, &od->od_stateid); } /* * The operation of this function assumes that this is the only * READ operation in the COMPOUND. If there are multiple READs, * we use nfsd4_encode_readv(). */ static __be32 nfsd4_encode_splice_read( struct nfsd4_compoundres *resp, struct nfsd4_read *read, struct file *file, unsigned long maxcount) { struct xdr_stream *xdr = resp->xdr; struct xdr_buf *buf = xdr->buf; int status, space_left; __be32 nfserr; /* * Make sure there is room at the end of buf->head for * svcxdr_encode_opaque_pages() to create a tail buffer * to XDR-pad the payload. */ if (xdr->iov != xdr->buf->head || xdr->end - xdr->p < 1) return nfserr_resource; nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp, file, read->rd_offset, &maxcount, &read->rd_eof); read->rd_length = maxcount; if (nfserr) goto out_err; svcxdr_encode_opaque_pages(read->rd_rqstp, xdr, buf->pages, buf->page_base, maxcount); status = svc_encode_result_payload(read->rd_rqstp, buf->head[0].iov_len, maxcount); if (status) { nfserr = nfserrno(status); goto out_err; } /* * Prepare to encode subsequent operations. * * xdr_truncate_encode() is not safe to use after a successful * splice read has been done, so the following stream * manipulations are open-coded. */ space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, buf->buflen - buf->len); buf->buflen = buf->len + space_left; xdr->end = (__be32 *)((void *)xdr->end + space_left); return nfs_ok; out_err: /* * nfsd_splice_actor may have already messed with the * page length; reset it so as not to confuse * xdr_truncate_encode in our caller. */ buf->page_len = 0; return nfserr; } static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, struct nfsd4_read *read, struct file *file, unsigned long maxcount) { struct xdr_stream *xdr = resp->xdr; unsigned int base = xdr->buf->page_len & ~PAGE_MASK; unsigned int starting_len = xdr->buf->len; __be32 zero = xdr_zero; __be32 nfserr; if (xdr_reserve_space_vec(xdr, maxcount) < 0) return nfserr_resource; nfserr = nfsd_iter_read(resp->rqstp, read->rd_fhp, file, read->rd_offset, &maxcount, base, &read->rd_eof); read->rd_length = maxcount; if (nfserr) return nfserr; if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount)) return nfserr_io; xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount)); write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &zero, xdr_pad_size(maxcount)); return nfs_ok; } static __be32 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp; struct nfsd4_read *read = &u->read; struct xdr_stream *xdr = resp->xdr; int starting_len = xdr->buf->len; bool splice_ok = argp->splice_ok; unsigned long maxcount; struct file *file; __be32 *p; if (nfserr) return nfserr; file = read->rd_nf->nf_file; p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ if (!p) { WARN_ON_ONCE(splice_ok); return nfserr_resource; } if (resp->xdr->buf->page_len && splice_ok) { WARN_ON_ONCE(1); return nfserr_serverfault; } xdr_commit_encode(xdr); maxcount = min_t(unsigned long, read->rd_length, (xdr->buf->buflen - xdr->buf->len)); if (file->f_op->splice_read && splice_ok) nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); else nfserr = nfsd4_encode_readv(resp, read, file, maxcount); if (nfserr) { xdr_truncate_encode(xdr, starting_len); return nfserr; } p = xdr_encode_bool(p, read->rd_eof); *p = cpu_to_be32(read->rd_length); return nfs_ok; } static __be32 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_readlink *readlink = &u->readlink; __be32 *p, *maxcount_p, zero = xdr_zero; struct xdr_stream *xdr = resp->xdr; int length_offset = xdr->buf->len; int maxcount, status; maxcount_p = xdr_reserve_space(xdr, XDR_UNIT); if (!maxcount_p) return nfserr_resource; maxcount = PAGE_SIZE; p = xdr_reserve_space(xdr, maxcount); if (!p) return nfserr_resource; /* * XXX: By default, vfs_readlink() will truncate symlinks if they * would overflow the buffer. Is this kosher in NFSv4? If not, one * easy fix is: if vfs_readlink() precisely fills the buffer, assume * that truncation occurred, and return NFS4ERR_RESOURCE. */ nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, (char *)p, &maxcount); if (nfserr == nfserr_isdir) nfserr = nfserr_inval; if (nfserr) goto out_err; status = svc_encode_result_payload(readlink->rl_rqstp, length_offset, maxcount); if (status) { nfserr = nfserrno(status); goto out_err; } *maxcount_p = cpu_to_be32(maxcount); xdr_truncate_encode(xdr, length_offset + 4 + xdr_align_size(maxcount)); write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero, xdr_pad_size(maxcount)); return nfs_ok; out_err: xdr_truncate_encode(xdr, length_offset); return nfserr; } static __be32 nfsd4_encode_dirlist4(struct xdr_stream *xdr, struct nfsd4_readdir *readdir, u32 max_payload) { int bytes_left, maxcount, starting_len = xdr->buf->len; loff_t offset; __be32 status; /* * Number of bytes left for directory entries allowing for the * final 8 bytes of the readdir and a following failed op. */ bytes_left = xdr->buf->buflen - xdr->buf->len - COMPOUND_ERR_SLACK_SPACE - XDR_UNIT * 2; if (bytes_left < 0) return nfserr_resource; maxcount = min_t(u32, readdir->rd_maxcount, max_payload); /* * The RFC defines rd_maxcount as the size of the * READDIR4resok structure, which includes the verifier * and the 8 bytes encoded at the end of this function. */ if (maxcount < XDR_UNIT * 4) return nfserr_toosmall; maxcount = min_t(int, maxcount - XDR_UNIT * 4, bytes_left); /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0 */ if (!readdir->rd_dircount) readdir->rd_dircount = max_payload; /* *entries */ readdir->xdr = xdr; readdir->rd_maxcount = maxcount; readdir->common.err = 0; readdir->cookie_offset = 0; offset = readdir->rd_cookie; status = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, &offset, &readdir->common, nfsd4_encode_entry4); if (status) return status; if (readdir->common.err == nfserr_toosmall && xdr->buf->len == starting_len) { /* No entries were encoded. Which limit did we hit? */ if (maxcount - XDR_UNIT * 4 < bytes_left) /* It was the fault of rd_maxcount */ return nfserr_toosmall; /* We ran out of buffer space */ return nfserr_resource; } /* Encode the final entry's cookie value */ nfsd4_encode_entry4_nfs_cookie4(readdir, offset); /* No entries follow */ if (xdr_stream_encode_item_absent(xdr) != XDR_UNIT) return nfserr_resource; /* eof */ return nfsd4_encode_bool(xdr, readdir->common.err == nfserr_eof); } static __be32 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_readdir *readdir = &u->readdir; struct xdr_stream *xdr = resp->xdr; int starting_len = xdr->buf->len; /* cookieverf */ nfserr = nfsd4_encode_verifier4(xdr, &readdir->rd_verf); if (nfserr != nfs_ok) return nfserr; /* reply */ nfserr = nfsd4_encode_dirlist4(xdr, readdir, svc_max_payload(resp->rqstp)); if (nfserr != nfs_ok) xdr_truncate_encode(xdr, starting_len); return nfserr; } static __be32 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_remove *remove = &u->remove; struct xdr_stream *xdr = resp->xdr; return nfsd4_encode_change_info4(xdr, &remove->rm_cinfo); } static __be32 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_rename *rename = &u->rename; struct xdr_stream *xdr = resp->xdr; nfserr = nfsd4_encode_change_info4(xdr, &rename->rn_sinfo); if (nfserr) return nfserr; return nfsd4_encode_change_info4(xdr, &rename->rn_tinfo); } static __be32 nfsd4_encode_rpcsec_gss_info(struct xdr_stream *xdr, struct rpcsec_gss_info *info) { __be32 status; /* oid */ if (xdr_stream_encode_opaque(xdr, info->oid.data, info->oid.len) < 0) return nfserr_resource; /* qop */ status = nfsd4_encode_qop4(xdr, info->qop); if (status != nfs_ok) return status; /* service */ if (xdr_stream_encode_u32(xdr, info->service) != XDR_UNIT) return nfserr_resource; return nfs_ok; } static __be32 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp) { u32 i, nflavs, supported; struct exp_flavor_info *flavs; struct exp_flavor_info def_flavs[2]; static bool report = true; __be32 *flavorsp; __be32 status; 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; } } supported = 0; flavorsp = xdr_reserve_space(xdr, XDR_UNIT); if (!flavorsp) return nfserr_resource; for (i = 0; i < nflavs; i++) { rpc_authflavor_t pf = flavs[i].pseudoflavor; struct rpcsec_gss_info info; if (rpcauth_get_gssinfo(pf, &info) == 0) { supported++; /* flavor */ status = nfsd4_encode_uint32_t(xdr, RPC_AUTH_GSS); if (status != nfs_ok) return status; /* flavor_info */ status = nfsd4_encode_rpcsec_gss_info(xdr, &info); if (status != nfs_ok) return status; } else if (pf < RPC_AUTH_MAXFLAVOR) { supported++; /* flavor */ status = nfsd4_encode_uint32_t(xdr, pf); if (status != nfs_ok) return status; } else { if (report) pr_warn("NFS: SECINFO: security flavor %u " "is not supported\n", pf); } } if (nflavs != supported) report = false; *flavorsp = cpu_to_be32(supported); return 0; } static __be32 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_secinfo *secinfo = &u->secinfo; struct xdr_stream *xdr = resp->xdr; return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp); } static __be32 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_secinfo_no_name *secinfo = &u->secinfo_no_name; struct xdr_stream *xdr = resp->xdr; return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp); } static __be32 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_setattr *setattr = &u->setattr; __be32 status; switch (nfserr) { case nfs_ok: /* attrsset */ status = nfsd4_encode_bitmap4(resp->xdr, setattr->sa_bmval[0], setattr->sa_bmval[1], setattr->sa_bmval[2]); break; default: /* attrsset */ status = nfsd4_encode_bitmap4(resp->xdr, 0, 0, 0); } return status != nfs_ok ? status : nfserr; } static __be32 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_setclientid *scd = &u->setclientid; struct xdr_stream *xdr = resp->xdr; if (!nfserr) { nfserr = nfsd4_encode_clientid4(xdr, &scd->se_clientid); if (nfserr != nfs_ok) goto out; nfserr = nfsd4_encode_verifier4(xdr, &scd->se_confirm); } else if (nfserr == nfserr_clid_inuse) { /* empty network id */ if (xdr_stream_encode_u32(xdr, 0) < 0) { nfserr = nfserr_resource; goto out; } /* empty universal address */ if (xdr_stream_encode_u32(xdr, 0) < 0) { nfserr = nfserr_resource; goto out; } } out: return nfserr; } static __be32 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_write *write = &u->write; struct xdr_stream *xdr = resp->xdr; /* count */ nfserr = nfsd4_encode_count4(xdr, write->wr_bytes_written); if (nfserr) return nfserr; /* committed */ if (xdr_stream_encode_u32(xdr, write->wr_how_written) != XDR_UNIT) return nfserr_resource; /* writeverf */ return nfsd4_encode_verifier4(xdr, &write->wr_verifier); } static __be32 nfsd4_encode_state_protect_ops4(struct xdr_stream *xdr, struct nfsd4_exchange_id *exid) { __be32 status; /* spo_must_enforce */ status = nfsd4_encode_bitmap4(xdr, exid->spo_must_enforce[0], exid->spo_must_enforce[1], exid->spo_must_enforce[2]); if (status != nfs_ok) return status; /* spo_must_allow */ return nfsd4_encode_bitmap4(xdr, exid->spo_must_allow[0], exid->spo_must_allow[1], exid->spo_must_allow[2]); } static __be32 nfsd4_encode_state_protect4_r(struct xdr_stream *xdr, struct nfsd4_exchange_id *exid) { __be32 status; if (xdr_stream_encode_u32(xdr, exid->spa_how) != XDR_UNIT) return nfserr_resource; switch (exid->spa_how) { case SP4_NONE: status = nfs_ok; break; case SP4_MACH_CRED: /* spr_mach_ops */ status = nfsd4_encode_state_protect_ops4(xdr, exid); break; default: status = nfserr_serverfault; } return status; } static __be32 nfsd4_encode_server_owner4(struct xdr_stream *xdr, struct svc_rqst *rqstp) { struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); __be32 status; /* so_minor_id */ status = nfsd4_encode_uint64_t(xdr, 0); if (status != nfs_ok) return status; /* so_major_id */ return nfsd4_encode_opaque(xdr, nn->nfsd_name, strlen(nn->nfsd_name)); } static __be32 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id); struct nfsd4_exchange_id *exid = &u->exchange_id; struct xdr_stream *xdr = resp->xdr; /* eir_clientid */ nfserr = nfsd4_encode_clientid4(xdr, &exid->clientid); if (nfserr != nfs_ok) return nfserr; /* eir_sequenceid */ nfserr = nfsd4_encode_sequenceid4(xdr, exid->seqid); if (nfserr != nfs_ok) return nfserr; /* eir_flags */ nfserr = nfsd4_encode_uint32_t(xdr, exid->flags); if (nfserr != nfs_ok) return nfserr; /* eir_state_protect */ nfserr = nfsd4_encode_state_protect4_r(xdr, exid); if (nfserr != nfs_ok) return nfserr; /* eir_server_owner */ nfserr = nfsd4_encode_server_owner4(xdr, resp->rqstp); if (nfserr != nfs_ok) return nfserr; /* eir_server_scope */ nfserr = nfsd4_encode_opaque(xdr, nn->nfsd_name, strlen(nn->nfsd_name)); if (nfserr != nfs_ok) return nfserr; /* eir_server_impl_id<1> */ if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT) return nfserr_resource; return nfs_ok; } static __be32 nfsd4_encode_channel_attrs4(struct xdr_stream *xdr, const struct nfsd4_channel_attrs *attrs) { __be32 status; /* ca_headerpadsize */ status = nfsd4_encode_count4(xdr, 0); if (status != nfs_ok) return status; /* ca_maxrequestsize */ status = nfsd4_encode_count4(xdr, attrs->maxreq_sz); if (status != nfs_ok) return status; /* ca_maxresponsesize */ status = nfsd4_encode_count4(xdr, attrs->maxresp_sz); if (status != nfs_ok) return status; /* ca_maxresponsesize_cached */ status = nfsd4_encode_count4(xdr, attrs->maxresp_cached); if (status != nfs_ok) return status; /* ca_maxoperations */ status = nfsd4_encode_count4(xdr, attrs->maxops); if (status != nfs_ok) return status; /* ca_maxrequests */ status = nfsd4_encode_count4(xdr, attrs->maxreqs); if (status != nfs_ok) return status; /* ca_rdma_ird<1> */ if (xdr_stream_encode_u32(xdr, attrs->nr_rdma_attrs) != XDR_UNIT) return nfserr_resource; if (attrs->nr_rdma_attrs) return nfsd4_encode_uint32_t(xdr, attrs->rdma_attrs); return nfs_ok; } static __be32 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_create_session *sess = &u->create_session; struct xdr_stream *xdr = resp->xdr; /* csr_sessionid */ nfserr = nfsd4_encode_sessionid4(xdr, &sess->sessionid); if (nfserr != nfs_ok) return nfserr; /* csr_sequence */ nfserr = nfsd4_encode_sequenceid4(xdr, sess->seqid); if (nfserr != nfs_ok) return nfserr; /* csr_flags */ nfserr = nfsd4_encode_uint32_t(xdr, sess->flags); if (nfserr != nfs_ok) return nfserr; /* csr_fore_chan_attrs */ nfserr = nfsd4_encode_channel_attrs4(xdr, &sess->fore_channel); if (nfserr != nfs_ok) return nfserr; /* csr_back_chan_attrs */ return nfsd4_encode_channel_attrs4(xdr, &sess->back_channel); } static __be32 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_sequence *seq = &u->sequence; struct xdr_stream *xdr = resp->xdr; /* sr_sessionid */ nfserr = nfsd4_encode_sessionid4(xdr, &seq->sessionid); if (nfserr != nfs_ok) return nfserr; /* sr_sequenceid */ nfserr = nfsd4_encode_sequenceid4(xdr, seq->seqid); if (nfserr != nfs_ok) return nfserr; /* sr_slotid */ nfserr = nfsd4_encode_slotid4(xdr, seq->slotid); if (nfserr != nfs_ok) return nfserr; /* Note slotid's are numbered from zero: */ /* sr_highest_slotid */ nfserr = nfsd4_encode_slotid4(xdr, seq->maxslots - 1); if (nfserr != nfs_ok) return nfserr; /* sr_target_highest_slotid */ nfserr = nfsd4_encode_slotid4(xdr, seq->maxslots - 1); if (nfserr != nfs_ok) return nfserr; /* sr_status_flags */ nfserr = nfsd4_encode_uint32_t(xdr, seq->status_flags); if (nfserr != nfs_ok) return nfserr; resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ return nfs_ok; } static __be32 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_test_stateid *test_stateid = &u->test_stateid; struct nfsd4_test_stateid_id *stateid, *next; struct xdr_stream *xdr = resp->xdr; /* tsr_status_codes<> */ if (xdr_stream_encode_u32(xdr, test_stateid->ts_num_ids) != XDR_UNIT) return nfserr_resource; list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { if (xdr_stream_encode_be32(xdr, stateid->ts_id_status) != XDR_UNIT) return nfserr_resource; } return nfs_ok; } #ifdef CONFIG_NFSD_PNFS static __be32 nfsd4_encode_device_addr4(struct xdr_stream *xdr, const struct nfsd4_getdeviceinfo *gdev) { u32 needed_len, starting_len = xdr->buf->len; const struct nfsd4_layout_ops *ops; __be32 status; /* da_layout_type */ if (xdr_stream_encode_u32(xdr, gdev->gd_layout_type) != XDR_UNIT) return nfserr_resource; /* da_addr_body */ ops = nfsd4_layout_ops[gdev->gd_layout_type]; status = ops->encode_getdeviceinfo(xdr, gdev); if (status != nfs_ok) { /* * Don't burden the layout drivers with enforcing * gd_maxcount. Just tell the client to come back * with a bigger buffer if it's not enough. */ if (xdr->buf->len + XDR_UNIT > gdev->gd_maxcount) goto toosmall; return status; } return nfs_ok; toosmall: needed_len = xdr->buf->len + XDR_UNIT; /* notifications */ xdr_truncate_encode(xdr, starting_len); status = nfsd4_encode_count4(xdr, needed_len); if (status != nfs_ok) return status; return nfserr_toosmall; } static __be32 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo; struct xdr_stream *xdr = resp->xdr; /* gdir_device_addr */ nfserr = nfsd4_encode_device_addr4(xdr, gdev); if (nfserr) return nfserr; /* gdir_notification */ return nfsd4_encode_bitmap4(xdr, gdev->gd_notify_types, 0, 0); } static __be32 nfsd4_encode_layout4(struct xdr_stream *xdr, const struct nfsd4_layoutget *lgp) { const struct nfsd4_layout_ops *ops = nfsd4_layout_ops[lgp->lg_layout_type]; __be32 status; /* lo_offset */ status = nfsd4_encode_offset4(xdr, lgp->lg_seg.offset); if (status != nfs_ok) return status; /* lo_length */ status = nfsd4_encode_length4(xdr, lgp->lg_seg.length); if (status != nfs_ok) return status; /* lo_iomode */ if (xdr_stream_encode_u32(xdr, lgp->lg_seg.iomode) != XDR_UNIT) return nfserr_resource; /* lo_content */ if (xdr_stream_encode_u32(xdr, lgp->lg_layout_type) != XDR_UNIT) return nfserr_resource; return ops->encode_layoutget(xdr, lgp); } static __be32 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_layoutget *lgp = &u->layoutget; struct xdr_stream *xdr = resp->xdr; /* logr_return_on_close */ nfserr = nfsd4_encode_bool(xdr, true); if (nfserr != nfs_ok) return nfserr; /* logr_stateid */ nfserr = nfsd4_encode_stateid4(xdr, &lgp->lg_sid); if (nfserr != nfs_ok) return nfserr; /* logr_layout<> */ if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT) return nfserr_resource; return nfsd4_encode_layout4(xdr, lgp); } static __be32 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_layoutcommit *lcp = &u->layoutcommit; struct xdr_stream *xdr = resp->xdr; /* ns_sizechanged */ nfserr = nfsd4_encode_bool(xdr, lcp->lc_size_chg); if (nfserr != nfs_ok) return nfserr; if (lcp->lc_size_chg) /* ns_size */ return nfsd4_encode_length4(xdr, lcp->lc_newsize); return nfs_ok; } static __be32 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_layoutreturn *lrp = &u->layoutreturn; struct xdr_stream *xdr = resp->xdr; /* lrs_present */ nfserr = nfsd4_encode_bool(xdr, lrp->lrs_present); if (nfserr != nfs_ok) return nfserr; if (lrp->lrs_present) /* lrs_stateid */ return nfsd4_encode_stateid4(xdr, &lrp->lr_sid); return nfs_ok; } #endif /* CONFIG_NFSD_PNFS */ static __be32 nfsd4_encode_write_response4(struct xdr_stream *xdr, const struct nfsd4_copy *copy) { const struct nfsd42_write_res *write = ©->cp_res; u32 count = nfsd4_copy_is_sync(copy) ? 0 : 1; __be32 status; /* wr_callback_id<1> */ if (xdr_stream_encode_u32(xdr, count) != XDR_UNIT) return nfserr_resource; if (count) { status = nfsd4_encode_stateid4(xdr, &write->cb_stateid); if (status != nfs_ok) return status; } /* wr_count */ status = nfsd4_encode_length4(xdr, write->wr_bytes_written); if (status != nfs_ok) return status; /* wr_committed */ if (xdr_stream_encode_u32(xdr, write->wr_stable_how) != XDR_UNIT) return nfserr_resource; /* wr_writeverf */ return nfsd4_encode_verifier4(xdr, &write->wr_verifier); } static __be32 nfsd4_encode_copy_requirements4(struct xdr_stream *xdr, const struct nfsd4_copy *copy) { __be32 status; /* cr_consecutive */ status = nfsd4_encode_bool(xdr, true); if (status != nfs_ok) return status; /* cr_synchronous */ return nfsd4_encode_bool(xdr, nfsd4_copy_is_sync(copy)); } static __be32 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_copy *copy = &u->copy; nfserr = nfsd4_encode_write_response4(resp->xdr, copy); if (nfserr != nfs_ok) return nfserr; return nfsd4_encode_copy_requirements4(resp->xdr, copy); } static __be32 nfsd4_encode_netloc4(struct xdr_stream *xdr, const struct nl4_server *ns) { __be32 status; if (xdr_stream_encode_u32(xdr, ns->nl4_type) != XDR_UNIT) return nfserr_resource; switch (ns->nl4_type) { case NL4_NETADDR: /* nl_addr */ status = nfsd4_encode_netaddr4(xdr, &ns->u.nl4_addr); break; default: status = nfserr_serverfault; } return status; } static __be32 nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_copy_notify *cn = &u->copy_notify; struct xdr_stream *xdr = resp->xdr; /* cnr_lease_time */ nfserr = nfsd4_encode_nfstime4(xdr, &cn->cpn_lease_time); if (nfserr) return nfserr; /* cnr_stateid */ nfserr = nfsd4_encode_stateid4(xdr, &cn->cpn_cnr_stateid); if (nfserr) return nfserr; /* cnr_source_server<> */ if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT) return nfserr_resource; return nfsd4_encode_netloc4(xdr, cn->cpn_src); } static __be32 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_offload_status *os = &u->offload_status; struct xdr_stream *xdr = resp->xdr; /* osr_count */ nfserr = nfsd4_encode_length4(xdr, os->count); if (nfserr != nfs_ok) return nfserr; /* osr_complete<1> */ if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT) return nfserr_resource; return nfs_ok; } static __be32 nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp, struct nfsd4_read *read) { struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp; struct file *file = read->rd_nf->nf_file; struct xdr_stream *xdr = resp->xdr; bool splice_ok = argp->splice_ok; unsigned long maxcount; __be32 nfserr, *p; /* Content type, offset, byte count */ p = xdr_reserve_space(xdr, 4 + 8 + 4); if (!p) return nfserr_io; if (resp->xdr->buf->page_len && splice_ok) { WARN_ON_ONCE(splice_ok); return nfserr_serverfault; } maxcount = min_t(unsigned long, read->rd_length, (xdr->buf->buflen - xdr->buf->len)); if (file->f_op->splice_read && splice_ok) nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); else nfserr = nfsd4_encode_readv(resp, read, file, maxcount); if (nfserr) return nfserr; *p++ = cpu_to_be32(NFS4_CONTENT_DATA); p = xdr_encode_hyper(p, read->rd_offset); *p = cpu_to_be32(read->rd_length); return nfs_ok; } static __be32 nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_read *read = &u->read; struct file *file = read->rd_nf->nf_file; struct xdr_stream *xdr = resp->xdr; int starting_len = xdr->buf->len; u32 segments = 0; __be32 *p; if (nfserr) return nfserr; /* eof flag, segment count */ p = xdr_reserve_space(xdr, 4 + 4); if (!p) return nfserr_io; xdr_commit_encode(xdr); read->rd_eof = read->rd_offset >= i_size_read(file_inode(file)); if (read->rd_eof) goto out; nfserr = nfsd4_encode_read_plus_data(resp, read); if (nfserr) { xdr_truncate_encode(xdr, starting_len); return nfserr; } segments++; out: p = xdr_encode_bool(p, read->rd_eof); *p = cpu_to_be32(segments); return nfserr; } static __be32 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_seek *seek = &u->seek; struct xdr_stream *xdr = resp->xdr; /* sr_eof */ nfserr = nfsd4_encode_bool(xdr, seek->seek_eof); if (nfserr != nfs_ok) return nfserr; /* sr_offset */ return nfsd4_encode_offset4(xdr, seek->seek_pos); } static __be32 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *p) { return nfserr; } /* * Encode kmalloc-ed buffer in to XDR stream. */ static __be32 nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen) { u32 cplen; __be32 *p; cplen = min_t(unsigned long, buflen, ((void *)xdr->end - (void *)xdr->p)); p = xdr_reserve_space(xdr, cplen); if (!p) return nfserr_resource; memcpy(p, buf, cplen); buf += cplen; buflen -= cplen; while (buflen) { cplen = min_t(u32, buflen, PAGE_SIZE); p = xdr_reserve_space(xdr, cplen); if (!p) return nfserr_resource; memcpy(p, buf, cplen); if (cplen < PAGE_SIZE) { /* * We're done, with a length that wasn't page * aligned, so possibly not word aligned. Pad * any trailing bytes with 0. */ xdr_encode_opaque_fixed(p, NULL, cplen); break; } buflen -= PAGE_SIZE; buf += PAGE_SIZE; } return 0; } static __be32 nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_getxattr *getxattr = &u->getxattr; struct xdr_stream *xdr = resp->xdr; __be32 *p, err; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p = cpu_to_be32(getxattr->getxa_len); if (getxattr->getxa_len == 0) return 0; err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf, getxattr->getxa_len); kvfree(getxattr->getxa_buf); return err; } static __be32 nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_setxattr *setxattr = &u->setxattr; struct xdr_stream *xdr = resp->xdr; return nfsd4_encode_change_info4(xdr, &setxattr->setxa_cinfo); } /* * See if there are cookie values that can be rejected outright. */ static __be32 nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs, u32 *offsetp) { u64 cookie = listxattrs->lsxa_cookie; /* * If the cookie is larger than the maximum number we can fit * in either the buffer we just got back from vfs_listxattr, or, * XDR-encoded, in the return buffer, it's invalid. */ if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2)) return nfserr_badcookie; if (cookie > (listxattrs->lsxa_maxcount / (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4))) return nfserr_badcookie; *offsetp = (u32)cookie; return 0; } static __be32 nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_listxattrs *listxattrs = &u->listxattrs; struct xdr_stream *xdr = resp->xdr; u32 cookie_offset, count_offset, eof; u32 left, xdrleft, slen, count; u32 xdrlen, offset; u64 cookie; char *sp; __be32 status, tmp; __be32 *p; u32 nuser; eof = 1; status = nfsd4_listxattr_validate_cookie(listxattrs, &offset); if (status) goto out; /* * Reserve space for the cookie and the name array count. Record * the offsets to save them later. */ cookie_offset = xdr->buf->len; count_offset = cookie_offset + 8; p = xdr_reserve_space(xdr, 12); if (!p) { status = nfserr_resource; goto out; } count = 0; left = listxattrs->lsxa_len; sp = listxattrs->lsxa_buf; nuser = 0; xdrleft = listxattrs->lsxa_maxcount; while (left > 0 && xdrleft > 0) { slen = strlen(sp); /* * Check if this is a "user." attribute, skip it if not. */ if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) goto contloop; slen -= XATTR_USER_PREFIX_LEN; xdrlen = 4 + ((slen + 3) & ~3); if (xdrlen > xdrleft) { if (count == 0) { /* * Can't even fit the first attribute name. */ status = nfserr_toosmall; goto out; } eof = 0; goto wreof; } left -= XATTR_USER_PREFIX_LEN; sp += XATTR_USER_PREFIX_LEN; if (nuser++ < offset) goto contloop; p = xdr_reserve_space(xdr, xdrlen); if (!p) { status = nfserr_resource; goto out; } xdr_encode_opaque(p, sp, slen); xdrleft -= xdrlen; count++; contloop: sp += slen + 1; left -= slen + 1; } /* * If there were user attributes to copy, but we didn't copy * any, the offset was too large (e.g. the cookie was invalid). */ if (nuser > 0 && count == 0) { status = nfserr_badcookie; goto out; } wreof: p = xdr_reserve_space(xdr, 4); if (!p) { status = nfserr_resource; goto out; } *p = cpu_to_be32(eof); cookie = offset + count; write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8); tmp = cpu_to_be32(count); write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4); out: if (listxattrs->lsxa_len) kvfree(listxattrs->lsxa_buf); return status; } static __be32 nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { struct nfsd4_removexattr *removexattr = &u->removexattr; struct xdr_stream *xdr = resp->xdr; return nfsd4_encode_change_info4(xdr, &removexattr->rmxa_cinfo); } typedef __be32(*nfsd4_enc)(struct nfsd4_compoundres *, __be32, union nfsd4_op_u *u); /* * 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 const nfsd4_enc nfsd4_enc_ops[] = { [OP_ACCESS] = nfsd4_encode_access, [OP_CLOSE] = nfsd4_encode_close, [OP_COMMIT] = nfsd4_encode_commit, [OP_CREATE] = nfsd4_encode_create, [OP_DELEGPURGE] = nfsd4_encode_noop, [OP_DELEGRETURN] = nfsd4_encode_noop, [OP_GETATTR] = nfsd4_encode_getattr, [OP_GETFH] = nfsd4_encode_getfh, [OP_LINK] = nfsd4_encode_link, [OP_LOCK] = nfsd4_encode_lock, [OP_LOCKT] = nfsd4_encode_lockt, [OP_LOCKU] = nfsd4_encode_locku, [OP_LOOKUP] = nfsd4_encode_noop, [OP_LOOKUPP] = nfsd4_encode_noop, [OP_NVERIFY] = nfsd4_encode_noop, [OP_OPEN] = nfsd4_encode_open, [OP_OPENATTR] = nfsd4_encode_noop, [OP_OPEN_CONFIRM] = nfsd4_encode_open_confirm, [OP_OPEN_DOWNGRADE] = nfsd4_encode_open_downgrade, [OP_PUTFH] = nfsd4_encode_noop, [OP_PUTPUBFH] = nfsd4_encode_noop, [OP_PUTROOTFH] = nfsd4_encode_noop, [OP_READ] = nfsd4_encode_read, [OP_READDIR] = nfsd4_encode_readdir, [OP_READLINK] = nfsd4_encode_readlink, [OP_REMOVE] = nfsd4_encode_remove, [OP_RENAME] = nfsd4_encode_rename, [OP_RENEW] = nfsd4_encode_noop, [OP_RESTOREFH] = nfsd4_encode_noop, [OP_SAVEFH] = nfsd4_encode_noop, [OP_SECINFO] = nfsd4_encode_secinfo, [OP_SETATTR] = nfsd4_encode_setattr, [OP_SETCLIENTID] = nfsd4_encode_setclientid, [OP_SETCLIENTID_CONFIRM] = nfsd4_encode_noop, [OP_VERIFY] = nfsd4_encode_noop, [OP_WRITE] = nfsd4_encode_write, [OP_RELEASE_LOCKOWNER] = nfsd4_encode_noop, /* NFSv4.1 operations */ [OP_BACKCHANNEL_CTL] = nfsd4_encode_noop, [OP_BIND_CONN_TO_SESSION] = nfsd4_encode_bind_conn_to_session, [OP_EXCHANGE_ID] = nfsd4_encode_exchange_id, [OP_CREATE_SESSION] = nfsd4_encode_create_session, [OP_DESTROY_SESSION] = nfsd4_encode_noop, [OP_FREE_STATEID] = nfsd4_encode_noop, [OP_GET_DIR_DELEGATION] = nfsd4_encode_noop, #ifdef CONFIG_NFSD_PNFS [OP_GETDEVICEINFO] = nfsd4_encode_getdeviceinfo, [OP_GETDEVICELIST] = nfsd4_encode_noop, [OP_LAYOUTCOMMIT] = nfsd4_encode_layoutcommit, [OP_LAYOUTGET] = nfsd4_encode_layoutget, [OP_LAYOUTRETURN] = nfsd4_encode_layoutreturn, #else [OP_GETDEVICEINFO] = nfsd4_encode_noop, [OP_GETDEVICELIST] = nfsd4_encode_noop, [OP_LAYOUTCOMMIT] = nfsd4_encode_noop, [OP_LAYOUTGET] = nfsd4_encode_noop, [OP_LAYOUTRETURN] = nfsd4_encode_noop, #endif [OP_SECINFO_NO_NAME] = nfsd4_encode_secinfo_no_name, [OP_SEQUENCE] = nfsd4_encode_sequence, [OP_SET_SSV] = nfsd4_encode_noop, [OP_TEST_STATEID] = nfsd4_encode_test_stateid, [OP_WANT_DELEGATION] = nfsd4_encode_noop, [OP_DESTROY_CLIENTID] = nfsd4_encode_noop, [OP_RECLAIM_COMPLETE] = nfsd4_encode_noop, /* NFSv4.2 operations */ [OP_ALLOCATE] = nfsd4_encode_noop, [OP_COPY] = nfsd4_encode_copy, [OP_COPY_NOTIFY] = nfsd4_encode_copy_notify, [OP_DEALLOCATE] = nfsd4_encode_noop, [OP_IO_ADVISE] = nfsd4_encode_noop, [OP_LAYOUTERROR] = nfsd4_encode_noop, [OP_LAYOUTSTATS] = nfsd4_encode_noop, [OP_OFFLOAD_CANCEL] = nfsd4_encode_noop, [OP_OFFLOAD_STATUS] = nfsd4_encode_offload_status, [OP_READ_PLUS] = nfsd4_encode_read_plus, [OP_SEEK] = nfsd4_encode_seek, [OP_WRITE_SAME] = nfsd4_encode_noop, [OP_CLONE] = nfsd4_encode_noop, /* RFC 8276 extended atributes operations */ [OP_GETXATTR] = nfsd4_encode_getxattr, [OP_SETXATTR] = nfsd4_encode_setxattr, [OP_LISTXATTRS] = nfsd4_encode_listxattrs, [OP_REMOVEXATTR] = nfsd4_encode_removexattr, }; /* * Calculate whether we still have space to encode repsize bytes. * There are two considerations: * - For NFS versions >=4.1, the size of the reply must stay within * session limits * - For all NFS versions, we must stay within limited preallocated * buffer space. * * This is called before the operation is processed, so can only provide * an upper estimate. For some nonidempotent operations (such as * getattr), it's not necessarily a problem if that estimate is wrong, * as we can fail it after processing without significant side effects. */ __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) { struct xdr_buf *buf = &resp->rqstp->rq_res; struct nfsd4_slot *slot = resp->cstate.slot; if (buf->len + respsize <= buf->buflen) return nfs_ok; if (!nfsd4_has_session(&resp->cstate)) return nfserr_resource; if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { WARN_ON_ONCE(1); return nfserr_rep_too_big_to_cache; } return nfserr_rep_too_big; } void nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) { struct xdr_stream *xdr = resp->xdr; struct nfs4_stateowner *so = resp->cstate.replay_owner; struct svc_rqst *rqstp = resp->rqstp; const struct nfsd4_operation *opdesc = op->opdesc; int post_err_offset; nfsd4_enc encoder; __be32 *p; p = xdr_reserve_space(xdr, 8); if (!p) goto release; *p++ = cpu_to_be32(op->opnum); post_err_offset = xdr->buf->len; if (op->opnum == OP_ILLEGAL) goto status; if (op->status && opdesc && !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE)) goto status; BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || !nfsd4_enc_ops[op->opnum]); encoder = nfsd4_enc_ops[op->opnum]; op->status = encoder(resp, op->status, &op->u); if (op->status) trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status); xdr_commit_encode(xdr); /* nfsd4_check_resp_size guarantees enough room for error status */ if (!op->status) { int space_needed = 0; if (!nfsd4_last_compound_op(rqstp)) space_needed = COMPOUND_ERR_SLACK_SPACE; op->status = nfsd4_check_resp_size(resp, space_needed); } if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { struct nfsd4_slot *slot = resp->cstate.slot; if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) op->status = nfserr_rep_too_big_to_cache; else op->status = nfserr_rep_too_big; } if (op->status == nfserr_resource || op->status == nfserr_rep_too_big || op->status == nfserr_rep_too_big_to_cache) { /* * The operation may have already been encoded or * partially encoded. No op returns anything additional * in the case of one of these three errors, so we can * just truncate back to after the status. But it's a * bug if we had to do this on a non-idempotent op: */ warn_on_nonidempotent_op(op); xdr_truncate_encode(xdr, post_err_offset); } if (so) { int len = xdr->buf->len - post_err_offset; so->so_replay.rp_status = op->status; so->so_replay.rp_buflen = len; read_bytes_from_xdr_buf(xdr->buf, post_err_offset, so->so_replay.rp_buf, len); } status: *p = op->status; release: if (opdesc && opdesc->op_release) opdesc->op_release(&op->u); /* * Account for pages consumed while encoding this operation. * The xdr_stream primitives don't manage rq_next_page. */ rqstp->rq_next_page = xdr->page_ptr + 1; } /* * 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. */ void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) { __be32 *p; struct nfs4_replay *rp = op->replay; p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); if (!p) { WARN_ON_ONCE(1); return; } *p++ = cpu_to_be32(op->opnum); *p++ = rp->rp_status; /* already xdr'ed */ p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); } void nfsd4_release_compoundargs(struct svc_rqst *rqstp) { struct nfsd4_compoundargs *args = rqstp->rq_argp; if (args->ops != args->iops) { vfree(args->ops); args->ops = args->iops; } while (args->to_free) { struct svcxdr_tmpbuf *tb = args->to_free; args->to_free = tb->next; kfree(tb); } } bool nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) { struct nfsd4_compoundargs *args = rqstp->rq_argp; /* svcxdr_tmp_alloc */ args->to_free = NULL; args->xdr = xdr; args->ops = args->iops; args->rqstp = rqstp; return nfsd4_decode_compound(args); } bool nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr) { struct nfsd4_compoundres *resp = rqstp->rq_resp; __be32 *p; /* * Send buffer space for the following items is reserved * at the top of nfsd4_proc_compound(). */ p = resp->statusp; *p++ = resp->cstate.status; *p++ = htonl(resp->taglen); memcpy(p, resp->tag, resp->taglen); p += XDR_QUADLEN(resp->taglen); *p++ = htonl(resp->opcnt); nfsd4_sequence_done(resp); return true; }
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