| /* |
| * 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/fs_struct.h> |
| #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 "idmap.h" |
| #include "acl.h" |
| #include "xdr4.h" |
| #include "vfs.h" |
| #include "state.h" |
| #include "cache.h" |
| #include "netns.h" |
| #include "pnfs.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 (isdotent(str, len)) |
| return nfserr_badname; |
| for (i = 0; i < len; i++) |
| if (str[i] == '/') |
| return nfserr_badname; |
| return 0; |
| } |
| |
| #define DECODE_HEAD \ |
| __be32 *p; \ |
| __be32 status |
| #define DECODE_TAIL \ |
| status = 0; \ |
| out: \ |
| return status; \ |
| xdr_error: \ |
| dprintk("NFSD: xdr error (%s:%d)\n", \ |
| __FILE__, __LINE__); \ |
| status = nfserr_bad_xdr; \ |
| goto out |
| |
| #define READMEM(x,nbytes) do { \ |
| x = (char *)p; \ |
| p += XDR_QUADLEN(nbytes); \ |
| } while (0) |
| #define SAVEMEM(x,nbytes) do { \ |
| if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ |
| savemem(argp, p, nbytes) : \ |
| (char *)p)) { \ |
| dprintk("NFSD: xdr error (%s:%d)\n", \ |
| __FILE__, __LINE__); \ |
| goto xdr_error; \ |
| } \ |
| p += XDR_QUADLEN(nbytes); \ |
| } while (0) |
| #define COPYMEM(x,nbytes) do { \ |
| memcpy((x), p, nbytes); \ |
| p += XDR_QUADLEN(nbytes); \ |
| } while (0) |
| |
| /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ |
| #define READ_BUF(nbytes) do { \ |
| if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ |
| p = argp->p; \ |
| argp->p += XDR_QUADLEN(nbytes); \ |
| } else if (!(p = read_buf(argp, nbytes))) { \ |
| dprintk("NFSD: xdr error (%s:%d)\n", \ |
| __FILE__, __LINE__); \ |
| goto xdr_error; \ |
| } \ |
| } while (0) |
| |
| static void next_decode_page(struct nfsd4_compoundargs *argp) |
| { |
| argp->p = page_address(argp->pagelist[0]); |
| argp->pagelist++; |
| if (argp->pagelen < PAGE_SIZE) { |
| argp->end = argp->p + XDR_QUADLEN(argp->pagelen); |
| argp->pagelen = 0; |
| } else { |
| argp->end = argp->p + (PAGE_SIZE>>2); |
| argp->pagelen -= PAGE_SIZE; |
| } |
| } |
| |
| static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) |
| { |
| /* We want more bytes than seem to be available. |
| * Maybe we need a new page, maybe we have just run out |
| */ |
| unsigned int avail = (char *)argp->end - (char *)argp->p; |
| __be32 *p; |
| |
| if (argp->pagelen == 0) { |
| struct kvec *vec = &argp->rqstp->rq_arg.tail[0]; |
| |
| if (!argp->tail) { |
| argp->tail = true; |
| avail = vec->iov_len; |
| argp->p = vec->iov_base; |
| argp->end = vec->iov_base + avail; |
| } |
| |
| if (avail < nbytes) |
| return NULL; |
| |
| p = argp->p; |
| argp->p += XDR_QUADLEN(nbytes); |
| return p; |
| } |
| |
| if (avail + argp->pagelen < nbytes) |
| return NULL; |
| if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ |
| return NULL; |
| /* ok, we can do it with the current plus the next page */ |
| if (nbytes <= sizeof(argp->tmp)) |
| p = argp->tmp; |
| else { |
| kfree(argp->tmpp); |
| p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); |
| if (!p) |
| return NULL; |
| |
| } |
| /* |
| * The following memcpy is safe because read_buf is always |
| * called with nbytes > avail, and the two cases above both |
| * guarantee p points to at least nbytes bytes. |
| */ |
| memcpy(p, argp->p, avail); |
| next_decode_page(argp); |
| memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); |
| argp->p += XDR_QUADLEN(nbytes - avail); |
| return p; |
| } |
| |
| static int zero_clientid(clientid_t *clid) |
| { |
| return (clid->cl_boot == 0) && (clid->cl_id == 0); |
| } |
| |
| /** |
| * svcxdr_tmpalloc - allocate memory to be freed after compound processing |
| * @argp: NFSv4 compound argument structure |
| * @p: pointer to be freed (with kfree()) |
| * |
| * Marks @p 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; |
| } |
| |
| /** |
| * savemem - duplicate a chunk of memory for later processing |
| * @argp: NFSv4 compound argument structure to be freed with |
| * @p: pointer to be duplicated |
| * @nbytes: length to be duplicated |
| * |
| * Returns a pointer to a copy of @nbytes bytes of memory at @p |
| * that are preserved until processing of the NFSv4 compound |
| * operation described by @argp finishes. |
| */ |
| static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) |
| { |
| void *ret; |
| |
| ret = svcxdr_tmpalloc(argp, nbytes); |
| if (!ret) |
| return NULL; |
| memcpy(ret, p, nbytes); |
| return ret; |
| } |
| |
| /* |
| * We require the high 32 bits of 'seconds' to be 0, and |
| * we ignore all 32 bits of 'nseconds'. |
| */ |
| static __be32 |
| nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv) |
| { |
| DECODE_HEAD; |
| u64 sec; |
| |
| READ_BUF(12); |
| p = xdr_decode_hyper(p, &sec); |
| tv->tv_sec = sec; |
| tv->tv_nsec = be32_to_cpup(p++); |
| if (tv->tv_nsec >= (u32)1000000000) |
| return nfserr_inval; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) |
| { |
| u32 bmlen; |
| DECODE_HEAD; |
| |
| bmval[0] = 0; |
| bmval[1] = 0; |
| bmval[2] = 0; |
| |
| READ_BUF(4); |
| bmlen = be32_to_cpup(p++); |
| if (bmlen > 1000) |
| goto xdr_error; |
| |
| READ_BUF(bmlen << 2); |
| if (bmlen > 0) |
| bmval[0] = be32_to_cpup(p++); |
| if (bmlen > 1) |
| bmval[1] = be32_to_cpup(p++); |
| if (bmlen > 2) |
| bmval[2] = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, |
| struct iattr *iattr, struct nfs4_acl **acl, |
| struct xdr_netobj *label, int *umask) |
| { |
| int expected_len, len = 0; |
| u32 dummy32; |
| char *buf; |
| |
| DECODE_HEAD; |
| iattr->ia_valid = 0; |
| if ((status = nfsd4_decode_bitmap(argp, bmval))) |
| return status; |
| |
| 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; |
| } |
| |
| READ_BUF(4); |
| expected_len = be32_to_cpup(p++); |
| |
| if (bmval[0] & FATTR4_WORD0_SIZE) { |
| READ_BUF(8); |
| len += 8; |
| p = xdr_decode_hyper(p, &iattr->ia_size); |
| iattr->ia_valid |= ATTR_SIZE; |
| } |
| if (bmval[0] & FATTR4_WORD0_ACL) { |
| u32 nace; |
| struct nfs4_ace *ace; |
| |
| READ_BUF(4); len += 4; |
| nace = be32_to_cpup(p++); |
| |
| if (nace > NFS4_ACL_MAX) |
| return nfserr_fbig; |
| |
| *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); |
| if (*acl == NULL) |
| return nfserr_jukebox; |
| |
| (*acl)->naces = nace; |
| for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { |
| READ_BUF(16); len += 16; |
| ace->type = be32_to_cpup(p++); |
| ace->flag = be32_to_cpup(p++); |
| ace->access_mask = be32_to_cpup(p++); |
| dummy32 = be32_to_cpup(p++); |
| READ_BUF(dummy32); |
| len += XDR_QUADLEN(dummy32) << 2; |
| READMEM(buf, dummy32); |
| ace->whotype = nfs4_acl_get_whotype(buf, dummy32); |
| status = nfs_ok; |
| if (ace->whotype != NFS4_ACL_WHO_NAMED) |
| ; |
| else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
| status = nfsd_map_name_to_gid(argp->rqstp, |
| buf, dummy32, &ace->who_gid); |
| else |
| status = nfsd_map_name_to_uid(argp->rqstp, |
| buf, dummy32, &ace->who_uid); |
| if (status) |
| return status; |
| } |
| } else |
| *acl = NULL; |
| if (bmval[1] & FATTR4_WORD1_MODE) { |
| READ_BUF(4); |
| len += 4; |
| iattr->ia_mode = be32_to_cpup(p++); |
| iattr->ia_mode &= (S_IFMT | S_IALLUGO); |
| iattr->ia_valid |= ATTR_MODE; |
| } |
| if (bmval[1] & FATTR4_WORD1_OWNER) { |
| READ_BUF(4); |
| len += 4; |
| dummy32 = be32_to_cpup(p++); |
| READ_BUF(dummy32); |
| len += (XDR_QUADLEN(dummy32) << 2); |
| READMEM(buf, dummy32); |
| if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) |
| return status; |
| iattr->ia_valid |= ATTR_UID; |
| } |
| if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { |
| READ_BUF(4); |
| len += 4; |
| dummy32 = be32_to_cpup(p++); |
| READ_BUF(dummy32); |
| len += (XDR_QUADLEN(dummy32) << 2); |
| READMEM(buf, dummy32); |
| if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) |
| return status; |
| iattr->ia_valid |= ATTR_GID; |
| } |
| if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { |
| READ_BUF(4); |
| len += 4; |
| dummy32 = be32_to_cpup(p++); |
| switch (dummy32) { |
| case NFS4_SET_TO_CLIENT_TIME: |
| len += 12; |
| status = nfsd4_decode_time(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: |
| goto xdr_error; |
| } |
| } |
| if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { |
| READ_BUF(4); |
| len += 4; |
| dummy32 = be32_to_cpup(p++); |
| switch (dummy32) { |
| case NFS4_SET_TO_CLIENT_TIME: |
| len += 12; |
| status = nfsd4_decode_time(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: |
| goto xdr_error; |
| } |
| } |
| |
| label->len = 0; |
| if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) && |
| bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { |
| READ_BUF(4); |
| len += 4; |
| dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ |
| READ_BUF(4); |
| len += 4; |
| dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ |
| READ_BUF(4); |
| len += 4; |
| dummy32 = be32_to_cpup(p++); |
| READ_BUF(dummy32); |
| if (dummy32 > NFS4_MAXLABELLEN) |
| return nfserr_badlabel; |
| len += (XDR_QUADLEN(dummy32) << 2); |
| READMEM(buf, dummy32); |
| label->len = dummy32; |
| label->data = svcxdr_dupstr(argp, buf, dummy32); |
| if (!label->data) |
| return nfserr_jukebox; |
| } |
| if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { |
| if (!umask) |
| goto xdr_error; |
| READ_BUF(8); |
| len += 8; |
| dummy32 = be32_to_cpup(p++); |
| iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO); |
| dummy32 = be32_to_cpup(p++); |
| *umask = dummy32 & S_IRWXUGO; |
| iattr->ia_valid |= ATTR_MODE; |
| } |
| if (len != expected_len) |
| goto xdr_error; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(sizeof(stateid_t)); |
| sid->si_generation = be32_to_cpup(p++); |
| COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| access->ac_req_access = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) |
| { |
| DECODE_HEAD; |
| u32 dummy, uid, gid; |
| char *machine_name; |
| int i; |
| int nr_secflavs; |
| |
| /* callback_sec_params4 */ |
| READ_BUF(4); |
| nr_secflavs = be32_to_cpup(p++); |
| 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) { |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| switch (dummy) { |
| case RPC_AUTH_NULL: |
| /* Nothing to read */ |
| if (cbs->flavor == (u32)(-1)) |
| cbs->flavor = RPC_AUTH_NULL; |
| break; |
| case RPC_AUTH_UNIX: |
| READ_BUF(8); |
| /* stamp */ |
| dummy = be32_to_cpup(p++); |
| |
| /* machine name */ |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy); |
| SAVEMEM(machine_name, dummy); |
| |
| /* uid, gid */ |
| READ_BUF(8); |
| uid = be32_to_cpup(p++); |
| gid = be32_to_cpup(p++); |
| |
| /* more gids */ |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy * 4); |
| if (cbs->flavor == (u32)(-1)) { |
| kuid_t kuid = make_kuid(&init_user_ns, uid); |
| kgid_t kgid = make_kgid(&init_user_ns, 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"); |
| } |
| } |
| break; |
| case RPC_AUTH_GSS: |
| dprintk("RPC_AUTH_GSS callback secflavor " |
| "not supported!\n"); |
| READ_BUF(8); |
| /* gcbp_service */ |
| dummy = be32_to_cpup(p++); |
| /* gcbp_handle_from_server */ |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| /* gcbp_handle_from_client */ |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy); |
| break; |
| default: |
| dprintk("Illegal callback secflavor\n"); |
| return nfserr_inval; |
| } |
| } |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| bc->bc_cb_program = be32_to_cpup(p++); |
| nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); |
| COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
| bcts->dir = be32_to_cpup(p++); |
| /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker |
| * could help us figure out we should be using it. */ |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| close->cl_seqid = be32_to_cpup(p++); |
| return nfsd4_decode_stateid(argp, &close->cl_stateid); |
| |
| DECODE_TAIL; |
| } |
| |
| |
| static __be32 |
| nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(12); |
| p = xdr_decode_hyper(p, &commit->co_offset); |
| commit->co_count = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| create->cr_type = be32_to_cpup(p++); |
| switch (create->cr_type) { |
| case NF4LNK: |
| READ_BUF(4); |
| create->cr_datalen = be32_to_cpup(p++); |
| READ_BUF(create->cr_datalen); |
| create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); |
| if (!create->cr_data) |
| return nfserr_jukebox; |
| break; |
| case NF4BLK: |
| case NF4CHR: |
| READ_BUF(8); |
| create->cr_specdata1 = be32_to_cpup(p++); |
| create->cr_specdata2 = be32_to_cpup(p++); |
| break; |
| case NF4SOCK: |
| case NF4FIFO: |
| case NF4DIR: |
| default: |
| break; |
| } |
| |
| READ_BUF(4); |
| create->cr_namelen = be32_to_cpup(p++); |
| READ_BUF(create->cr_namelen); |
| SAVEMEM(create->cr_name, create->cr_namelen); |
| if ((status = check_filename(create->cr_name, create->cr_namelen))) |
| return status; |
| |
| status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, |
| &create->cr_acl, &create->cr_label, |
| ¤t->fs->umask); |
| if (status) |
| goto out; |
| |
| DECODE_TAIL; |
| } |
| |
| static inline __be32 |
| nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) |
| { |
| return nfsd4_decode_stateid(argp, &dr->dr_stateid); |
| } |
| |
| static inline __be32 |
| nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) |
| { |
| return nfsd4_decode_bitmap(argp, getattr->ga_bmval); |
| } |
| |
| static __be32 |
| nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| link->li_namelen = be32_to_cpup(p++); |
| READ_BUF(link->li_namelen); |
| SAVEMEM(link->li_name, link->li_namelen); |
| if ((status = check_filename(link->li_name, link->li_namelen))) |
| return status; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) |
| { |
| DECODE_HEAD; |
| |
| /* |
| * type, reclaim(boolean), offset, length, new_lock_owner(boolean) |
| */ |
| READ_BUF(28); |
| lock->lk_type = be32_to_cpup(p++); |
| if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) |
| goto xdr_error; |
| lock->lk_reclaim = be32_to_cpup(p++); |
| p = xdr_decode_hyper(p, &lock->lk_offset); |
| p = xdr_decode_hyper(p, &lock->lk_length); |
| lock->lk_is_new = be32_to_cpup(p++); |
| |
| if (lock->lk_is_new) { |
| READ_BUF(4); |
| lock->lk_new_open_seqid = be32_to_cpup(p++); |
| status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); |
| if (status) |
| return status; |
| READ_BUF(8 + sizeof(clientid_t)); |
| lock->lk_new_lock_seqid = be32_to_cpup(p++); |
| COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); |
| lock->lk_new_owner.len = be32_to_cpup(p++); |
| READ_BUF(lock->lk_new_owner.len); |
| READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); |
| } else { |
| status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); |
| if (status) |
| return status; |
| READ_BUF(4); |
| lock->lk_old_lock_seqid = be32_to_cpup(p++); |
| } |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(32); |
| lockt->lt_type = be32_to_cpup(p++); |
| if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) |
| goto xdr_error; |
| p = xdr_decode_hyper(p, &lockt->lt_offset); |
| p = xdr_decode_hyper(p, &lockt->lt_length); |
| COPYMEM(&lockt->lt_clientid, 8); |
| lockt->lt_owner.len = be32_to_cpup(p++); |
| READ_BUF(lockt->lt_owner.len); |
| READMEM(lockt->lt_owner.data, lockt->lt_owner.len); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(8); |
| locku->lu_type = be32_to_cpup(p++); |
| if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) |
| goto xdr_error; |
| locku->lu_seqid = be32_to_cpup(p++); |
| status = nfsd4_decode_stateid(argp, &locku->lu_stateid); |
| if (status) |
| return status; |
| READ_BUF(16); |
| p = xdr_decode_hyper(p, &locku->lu_offset); |
| p = xdr_decode_hyper(p, &locku->lu_length); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| lookup->lo_len = be32_to_cpup(p++); |
| READ_BUF(lookup->lo_len); |
| SAVEMEM(lookup->lo_name, lookup->lo_len); |
| if ((status = check_filename(lookup->lo_name, lookup->lo_len))) |
| return status; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) |
| { |
| __be32 *p; |
| u32 w; |
| |
| READ_BUF(4); |
| w = be32_to_cpup(p++); |
| *share_access = w & NFS4_SHARE_ACCESS_MASK; |
| *deleg_want = w & NFS4_SHARE_WANT_MASK; |
| if (deleg_when) |
| *deleg_when = w & NFS4_SHARE_WHEN_MASK; |
| |
| switch (w & NFS4_SHARE_ACCESS_MASK) { |
| case NFS4_SHARE_ACCESS_READ: |
| case NFS4_SHARE_ACCESS_WRITE: |
| case NFS4_SHARE_ACCESS_BOTH: |
| break; |
| default: |
| return nfserr_bad_xdr; |
| } |
| w &= ~NFS4_SHARE_ACCESS_MASK; |
| if (!w) |
| return nfs_ok; |
| if (!argp->minorversion) |
| return nfserr_bad_xdr; |
| switch (w & NFS4_SHARE_WANT_MASK) { |
| case NFS4_SHARE_WANT_NO_PREFERENCE: |
| case NFS4_SHARE_WANT_READ_DELEG: |
| case NFS4_SHARE_WANT_WRITE_DELEG: |
| case NFS4_SHARE_WANT_ANY_DELEG: |
| case NFS4_SHARE_WANT_NO_DELEG: |
| case NFS4_SHARE_WANT_CANCEL: |
| break; |
| default: |
| return nfserr_bad_xdr; |
| } |
| w &= ~NFS4_SHARE_WANT_MASK; |
| if (!w) |
| return nfs_ok; |
| |
| if (!deleg_when) /* open_downgrade */ |
| return nfserr_inval; |
| switch (w) { |
| case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: |
| case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: |
| case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | |
| NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): |
| return nfs_ok; |
| } |
| xdr_error: |
| return nfserr_bad_xdr; |
| } |
| |
| static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) |
| { |
| __be32 *p; |
| |
| READ_BUF(4); |
| *x = be32_to_cpup(p++); |
| /* Note: unlinke access bits, deny bits may be zero. */ |
| if (*x & ~NFS4_SHARE_DENY_BOTH) |
| return nfserr_bad_xdr; |
| return nfs_ok; |
| xdr_error: |
| return nfserr_bad_xdr; |
| } |
| |
| static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) |
| { |
| __be32 *p; |
| |
| READ_BUF(4); |
| o->len = be32_to_cpup(p++); |
| |
| if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) |
| return nfserr_bad_xdr; |
| |
| READ_BUF(o->len); |
| SAVEMEM(o->data, o->len); |
| return nfs_ok; |
| xdr_error: |
| return nfserr_bad_xdr; |
| } |
| |
| static __be32 |
| nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
| { |
| DECODE_HEAD; |
| u32 dummy; |
| |
| memset(open->op_bmval, 0, sizeof(open->op_bmval)); |
| open->op_iattr.ia_valid = 0; |
| open->op_openowner = NULL; |
| |
| open->op_xdr_error = 0; |
| /* seqid, share_access, share_deny, clientid, ownerlen */ |
| READ_BUF(4); |
| open->op_seqid = be32_to_cpup(p++); |
| /* decode, yet ignore deleg_when until supported */ |
| status = nfsd4_decode_share_access(argp, &open->op_share_access, |
| &open->op_deleg_want, &dummy); |
| if (status) |
| goto xdr_error; |
| status = nfsd4_decode_share_deny(argp, &open->op_share_deny); |
| if (status) |
| goto xdr_error; |
| READ_BUF(sizeof(clientid_t)); |
| COPYMEM(&open->op_clientid, sizeof(clientid_t)); |
| status = nfsd4_decode_opaque(argp, &open->op_owner); |
| if (status) |
| goto xdr_error; |
| READ_BUF(4); |
| open->op_create = be32_to_cpup(p++); |
| switch (open->op_create) { |
| case NFS4_OPEN_NOCREATE: |
| break; |
| case NFS4_OPEN_CREATE: |
| current->fs->umask = 0; |
| READ_BUF(4); |
| open->op_createmode = be32_to_cpup(p++); |
| switch (open->op_createmode) { |
| case NFS4_CREATE_UNCHECKED: |
| case NFS4_CREATE_GUARDED: |
| status = nfsd4_decode_fattr(argp, open->op_bmval, |
| &open->op_iattr, &open->op_acl, &open->op_label, |
| ¤t->fs->umask); |
| if (status) |
| goto out; |
| break; |
| case NFS4_CREATE_EXCLUSIVE: |
| READ_BUF(NFS4_VERIFIER_SIZE); |
| COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); |
| break; |
| case NFS4_CREATE_EXCLUSIVE4_1: |
| if (argp->minorversion < 1) |
| goto xdr_error; |
| READ_BUF(NFS4_VERIFIER_SIZE); |
| COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); |
| status = nfsd4_decode_fattr(argp, open->op_bmval, |
| &open->op_iattr, &open->op_acl, &open->op_label, |
| ¤t->fs->umask); |
| if (status) |
| goto out; |
| break; |
| default: |
| goto xdr_error; |
| } |
| break; |
| default: |
| goto xdr_error; |
| } |
| |
| /* open_claim */ |
| READ_BUF(4); |
| open->op_claim_type = be32_to_cpup(p++); |
| switch (open->op_claim_type) { |
| case NFS4_OPEN_CLAIM_NULL: |
| case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
| READ_BUF(4); |
| open->op_fname.len = be32_to_cpup(p++); |
| READ_BUF(open->op_fname.len); |
| SAVEMEM(open->op_fname.data, open->op_fname.len); |
| if ((status = check_filename(open->op_fname.data, open->op_fname.len))) |
| return status; |
| break; |
| case NFS4_OPEN_CLAIM_PREVIOUS: |
| READ_BUF(4); |
| open->op_delegate_type = be32_to_cpup(p++); |
| break; |
| case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
| status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); |
| if (status) |
| return status; |
| READ_BUF(4); |
| open->op_fname.len = be32_to_cpup(p++); |
| READ_BUF(open->op_fname.len); |
| SAVEMEM(open->op_fname.data, open->op_fname.len); |
| if ((status = check_filename(open->op_fname.data, open->op_fname.len))) |
| return status; |
| break; |
| case NFS4_OPEN_CLAIM_FH: |
| case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
| if (argp->minorversion < 1) |
| goto xdr_error; |
| /* void */ |
| break; |
| case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| if (argp->minorversion < 1) |
| goto xdr_error; |
| status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); |
| if (status) |
| return status; |
| break; |
| default: |
| goto xdr_error; |
| } |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) |
| { |
| DECODE_HEAD; |
| |
| if (argp->minorversion >= 1) |
| return nfserr_notsupp; |
| |
| status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); |
| if (status) |
| return status; |
| READ_BUF(4); |
| open_conf->oc_seqid = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) |
| { |
| DECODE_HEAD; |
| |
| status = nfsd4_decode_stateid(argp, &open_down->od_stateid); |
| if (status) |
| return status; |
| READ_BUF(4); |
| open_down->od_seqid = be32_to_cpup(p++); |
| status = nfsd4_decode_share_access(argp, &open_down->od_share_access, |
| &open_down->od_deleg_want, NULL); |
| if (status) |
| return status; |
| status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); |
| if (status) |
| return status; |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| putfh->pf_fhlen = be32_to_cpup(p++); |
| if (putfh->pf_fhlen > NFS4_FHSIZE) |
| goto xdr_error; |
| READ_BUF(putfh->pf_fhlen); |
| SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) |
| { |
| if (argp->minorversion == 0) |
| return nfs_ok; |
| return nfserr_notsupp; |
| } |
| |
| static __be32 |
| nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) |
| { |
| DECODE_HEAD; |
| |
| status = nfsd4_decode_stateid(argp, &read->rd_stateid); |
| if (status) |
| return status; |
| READ_BUF(12); |
| p = xdr_decode_hyper(p, &read->rd_offset); |
| read->rd_length = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(24); |
| p = xdr_decode_hyper(p, &readdir->rd_cookie); |
| COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); |
| readdir->rd_dircount = be32_to_cpup(p++); |
| readdir->rd_maxcount = be32_to_cpup(p++); |
| if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) |
| goto out; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| remove->rm_namelen = be32_to_cpup(p++); |
| READ_BUF(remove->rm_namelen); |
| SAVEMEM(remove->rm_name, remove->rm_namelen); |
| if ((status = check_filename(remove->rm_name, remove->rm_namelen))) |
| return status; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| rename->rn_snamelen = be32_to_cpup(p++); |
| READ_BUF(rename->rn_snamelen); |
| SAVEMEM(rename->rn_sname, rename->rn_snamelen); |
| READ_BUF(4); |
| rename->rn_tnamelen = be32_to_cpup(p++); |
| READ_BUF(rename->rn_tnamelen); |
| SAVEMEM(rename->rn_tname, rename->rn_tnamelen); |
| if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) |
| return status; |
| if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) |
| return status; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) |
| { |
| DECODE_HEAD; |
| |
| if (argp->minorversion >= 1) |
| return nfserr_notsupp; |
| |
| READ_BUF(sizeof(clientid_t)); |
| COPYMEM(clientid, sizeof(clientid_t)); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, |
| struct nfsd4_secinfo *secinfo) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| secinfo->si_namelen = be32_to_cpup(p++); |
| READ_BUF(secinfo->si_namelen); |
| SAVEMEM(secinfo->si_name, secinfo->si_namelen); |
| status = check_filename(secinfo->si_name, secinfo->si_namelen); |
| if (status) |
| return status; |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, |
| struct nfsd4_secinfo_no_name *sin) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| sin->sin_style = be32_to_cpup(p++); |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) |
| { |
| __be32 status; |
| |
| status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); |
| if (status) |
| return status; |
| return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, |
| &setattr->sa_acl, &setattr->sa_label, NULL); |
| } |
| |
| static __be32 |
| nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) |
| { |
| DECODE_HEAD; |
| |
| if (argp->minorversion >= 1) |
| return nfserr_notsupp; |
| |
| READ_BUF(NFS4_VERIFIER_SIZE); |
| COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); |
| |
| status = nfsd4_decode_opaque(argp, &setclientid->se_name); |
| if (status) |
| return nfserr_bad_xdr; |
| READ_BUF(8); |
| setclientid->se_callback_prog = be32_to_cpup(p++); |
| setclientid->se_callback_netid_len = be32_to_cpup(p++); |
| READ_BUF(setclientid->se_callback_netid_len); |
| SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); |
| READ_BUF(4); |
| setclientid->se_callback_addr_len = be32_to_cpup(p++); |
| |
| READ_BUF(setclientid->se_callback_addr_len); |
| SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); |
| READ_BUF(4); |
| setclientid->se_callback_ident = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) |
| { |
| DECODE_HEAD; |
| |
| if (argp->minorversion >= 1) |
| return nfserr_notsupp; |
| |
| READ_BUF(8 + NFS4_VERIFIER_SIZE); |
| COPYMEM(&scd_c->sc_clientid, 8); |
| COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); |
| |
| DECODE_TAIL; |
| } |
| |
| /* Also used for NVERIFY */ |
| static __be32 |
| nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) |
| { |
| DECODE_HEAD; |
| |
| if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) |
| goto out; |
| |
| /* For convenience's sake, we compare raw xdr'd attributes in |
| * nfsd4_proc_verify */ |
| |
| READ_BUF(4); |
| verify->ve_attrlen = be32_to_cpup(p++); |
| READ_BUF(verify->ve_attrlen); |
| SAVEMEM(verify->ve_attrval, verify->ve_attrlen); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) |
| { |
| int avail; |
| int len; |
| DECODE_HEAD; |
| |
| status = nfsd4_decode_stateid(argp, &write->wr_stateid); |
| if (status) |
| return status; |
| READ_BUF(16); |
| p = xdr_decode_hyper(p, &write->wr_offset); |
| write->wr_stable_how = be32_to_cpup(p++); |
| if (write->wr_stable_how > NFS_FILE_SYNC) |
| goto xdr_error; |
| write->wr_buflen = be32_to_cpup(p++); |
| |
| /* Sorry .. no magic macros for this.. * |
| * READ_BUF(write->wr_buflen); |
| * SAVEMEM(write->wr_buf, write->wr_buflen); |
| */ |
| avail = (char*)argp->end - (char*)argp->p; |
| if (avail + argp->pagelen < write->wr_buflen) { |
| dprintk("NFSD: xdr error (%s:%d)\n", |
| __FILE__, __LINE__); |
| goto xdr_error; |
| } |
| write->wr_head.iov_base = p; |
| write->wr_head.iov_len = avail; |
| write->wr_pagelist = argp->pagelist; |
| |
| len = XDR_QUADLEN(write->wr_buflen) << 2; |
| if (len >= avail) { |
| int pages; |
| |
| len -= avail; |
| |
| pages = len >> PAGE_SHIFT; |
| argp->pagelist += pages; |
| argp->pagelen -= pages * PAGE_SIZE; |
| len -= pages * PAGE_SIZE; |
| |
| next_decode_page(argp); |
| } |
| argp->p += XDR_QUADLEN(len); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) |
| { |
| DECODE_HEAD; |
| |
| if (argp->minorversion >= 1) |
| return nfserr_notsupp; |
| |
| READ_BUF(12); |
| COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); |
| rlockowner->rl_owner.len = be32_to_cpup(p++); |
| READ_BUF(rlockowner->rl_owner.len); |
| READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); |
| |
| if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) |
| return nfserr_inval; |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, |
| struct nfsd4_exchange_id *exid) |
| { |
| int dummy, tmp; |
| DECODE_HEAD; |
| |
| READ_BUF(NFS4_VERIFIER_SIZE); |
| COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); |
| |
| status = nfsd4_decode_opaque(argp, &exid->clname); |
| if (status) |
| return nfserr_bad_xdr; |
| |
| READ_BUF(4); |
| exid->flags = be32_to_cpup(p++); |
| |
| /* Ignore state_protect4_a */ |
| READ_BUF(4); |
| exid->spa_how = be32_to_cpup(p++); |
| switch (exid->spa_how) { |
| case SP4_NONE: |
| break; |
| case SP4_MACH_CRED: |
| /* spo_must_enforce */ |
| status = nfsd4_decode_bitmap(argp, |
| exid->spo_must_enforce); |
| if (status) |
| goto out; |
| /* spo_must_allow */ |
| status = nfsd4_decode_bitmap(argp, exid->spo_must_allow); |
| if (status) |
| goto out; |
| break; |
| case SP4_SSV: |
| /* ssp_ops */ |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy * 4); |
| p += dummy; |
| |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy * 4); |
| p += dummy; |
| |
| /* ssp_hash_algs<> */ |
| READ_BUF(4); |
| tmp = be32_to_cpup(p++); |
| while (tmp--) { |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| } |
| |
| /* ssp_encr_algs<> */ |
| READ_BUF(4); |
| tmp = be32_to_cpup(p++); |
| while (tmp--) { |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| } |
| |
| /* ssp_window and ssp_num_gss_handles */ |
| READ_BUF(8); |
| dummy = be32_to_cpup(p++); |
| dummy = be32_to_cpup(p++); |
| break; |
| default: |
| goto xdr_error; |
| } |
| |
| /* Ignore Implementation ID */ |
| READ_BUF(4); /* nfs_impl_id4 array length */ |
| dummy = be32_to_cpup(p++); |
| |
| if (dummy > 1) |
| goto xdr_error; |
| |
| if (dummy == 1) { |
| /* nii_domain */ |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| |
| /* nii_name */ |
| READ_BUF(4); |
| dummy = be32_to_cpup(p++); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| |
| /* nii_date */ |
| READ_BUF(12); |
| p += 3; |
| } |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, |
| struct nfsd4_create_session *sess) |
| { |
| DECODE_HEAD; |
| u32 dummy; |
| |
| READ_BUF(16); |
| COPYMEM(&sess->clientid, 8); |
| sess->seqid = be32_to_cpup(p++); |
| sess->flags = be32_to_cpup(p++); |
| |
| /* Fore channel attrs */ |
| READ_BUF(28); |
| dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ |
| sess->fore_channel.maxreq_sz = be32_to_cpup(p++); |
| sess->fore_channel.maxresp_sz = be32_to_cpup(p++); |
| sess->fore_channel.maxresp_cached = be32_to_cpup(p++); |
| sess->fore_channel.maxops = be32_to_cpup(p++); |
| sess->fore_channel.maxreqs = be32_to_cpup(p++); |
| sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); |
| if (sess->fore_channel.nr_rdma_attrs == 1) { |
| READ_BUF(4); |
| sess->fore_channel.rdma_attrs = be32_to_cpup(p++); |
| } else if (sess->fore_channel.nr_rdma_attrs > 1) { |
| dprintk("Too many fore channel attr bitmaps!\n"); |
| goto xdr_error; |
| } |
| |
| /* Back channel attrs */ |
| READ_BUF(28); |
| dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ |
| sess->back_channel.maxreq_sz = be32_to_cpup(p++); |
| sess->back_channel.maxresp_sz = be32_to_cpup(p++); |
| sess->back_channel.maxresp_cached = be32_to_cpup(p++); |
| sess->back_channel.maxops = be32_to_cpup(p++); |
| sess->back_channel.maxreqs = be32_to_cpup(p++); |
| sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); |
| if (sess->back_channel.nr_rdma_attrs == 1) { |
| READ_BUF(4); |
| sess->back_channel.rdma_attrs = be32_to_cpup(p++); |
| } else if (sess->back_channel.nr_rdma_attrs > 1) { |
| dprintk("Too many back channel attr bitmaps!\n"); |
| goto xdr_error; |
| } |
| |
| READ_BUF(4); |
| sess->callback_prog = be32_to_cpup(p++); |
| nfsd4_decode_cb_sec(argp, &sess->cb_sec); |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, |
| struct nfsd4_destroy_session *destroy_session) |
| { |
| DECODE_HEAD; |
| READ_BUF(NFS4_MAX_SESSIONID_LEN); |
| COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, |
| struct nfsd4_free_stateid *free_stateid) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(sizeof(stateid_t)); |
| free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); |
| COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, |
| struct nfsd4_sequence *seq) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); |
| COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
| seq->seqid = be32_to_cpup(p++); |
| seq->slotid = be32_to_cpup(p++); |
| seq->maxslots = be32_to_cpup(p++); |
| seq->cachethis = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) |
| { |
| int i; |
| __be32 *p, status; |
| struct nfsd4_test_stateid_id *stateid; |
| |
| READ_BUF(4); |
| test_stateid->ts_num_ids = ntohl(*p++); |
| |
| INIT_LIST_HEAD(&test_stateid->ts_stateid_list); |
| |
| for (i = 0; i < test_stateid->ts_num_ids; i++) { |
| stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); |
| if (!stateid) { |
| status = nfserrno(-ENOMEM); |
| goto out; |
| } |
| |
| INIT_LIST_HEAD(&stateid->ts_id_list); |
| list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); |
| |
| status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); |
| if (status) |
| goto out; |
| } |
| |
| status = 0; |
| out: |
| return status; |
| xdr_error: |
| dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); |
| status = nfserr_bad_xdr; |
| goto out; |
| } |
| |
| static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(8); |
| COPYMEM(&dc->clientid, 8); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| rc->rca_one_fs = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| #ifdef CONFIG_NFSD_PNFS |
| static __be32 |
| nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, |
| struct nfsd4_getdeviceinfo *gdev) |
| { |
| DECODE_HEAD; |
| u32 num, i; |
| |
| READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4); |
| COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid)); |
| gdev->gd_layout_type = be32_to_cpup(p++); |
| gdev->gd_maxcount = be32_to_cpup(p++); |
| num = be32_to_cpup(p++); |
| if (num) { |
| READ_BUF(4 * num); |
| gdev->gd_notify_types = be32_to_cpup(p++); |
| for (i = 1; i < num; i++) { |
| if (be32_to_cpup(p++)) { |
| status = nfserr_inval; |
| goto out; |
| } |
| } |
| } |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, |
| struct nfsd4_layoutget *lgp) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(36); |
| lgp->lg_signal = be32_to_cpup(p++); |
| lgp->lg_layout_type = be32_to_cpup(p++); |
| lgp->lg_seg.iomode = be32_to_cpup(p++); |
| p = xdr_decode_hyper(p, &lgp->lg_seg.offset); |
| p = xdr_decode_hyper(p, &lgp->lg_seg.length); |
| p = xdr_decode_hyper(p, &lgp->lg_minlength); |
| |
| status = nfsd4_decode_stateid(argp, &lgp->lg_sid); |
| if (status) |
| return status; |
| |
| READ_BUF(4); |
| lgp->lg_maxcount = be32_to_cpup(p++); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, |
| struct nfsd4_layoutcommit *lcp) |
| { |
| DECODE_HEAD; |
| u32 timechange; |
| |
| READ_BUF(20); |
| p = xdr_decode_hyper(p, &lcp->lc_seg.offset); |
| p = xdr_decode_hyper(p, &lcp->lc_seg.length); |
| lcp->lc_reclaim = be32_to_cpup(p++); |
| |
| status = nfsd4_decode_stateid(argp, &lcp->lc_sid); |
| if (status) |
| return status; |
| |
| READ_BUF(4); |
| lcp->lc_newoffset = be32_to_cpup(p++); |
| if (lcp->lc_newoffset) { |
| READ_BUF(8); |
| p = xdr_decode_hyper(p, &lcp->lc_last_wr); |
| } else |
| lcp->lc_last_wr = 0; |
| READ_BUF(4); |
| timechange = be32_to_cpup(p++); |
| if (timechange) { |
| status = nfsd4_decode_time(argp, &lcp->lc_mtime); |
| if (status) |
| return status; |
| } else { |
| lcp->lc_mtime.tv_nsec = UTIME_NOW; |
| } |
| READ_BUF(8); |
| lcp->lc_layout_type = be32_to_cpup(p++); |
| |
| /* |
| * Save the layout update in XDR format and let the layout driver deal |
| * with it later. |
| */ |
| lcp->lc_up_len = be32_to_cpup(p++); |
| if (lcp->lc_up_len > 0) { |
| READ_BUF(lcp->lc_up_len); |
| READMEM(lcp->lc_up_layout, lcp->lc_up_len); |
| } |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, |
| struct nfsd4_layoutreturn *lrp) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(16); |
| lrp->lr_reclaim = be32_to_cpup(p++); |
| lrp->lr_layout_type = be32_to_cpup(p++); |
| lrp->lr_seg.iomode = be32_to_cpup(p++); |
| lrp->lr_return_type = be32_to_cpup(p++); |
| if (lrp->lr_return_type == RETURN_FILE) { |
| READ_BUF(16); |
| p = xdr_decode_hyper(p, &lrp->lr_seg.offset); |
| p = xdr_decode_hyper(p, &lrp->lr_seg.length); |
| |
| status = nfsd4_decode_stateid(argp, &lrp->lr_sid); |
| if (status) |
| return status; |
| |
| READ_BUF(4); |
| lrp->lrf_body_len = be32_to_cpup(p++); |
| if (lrp->lrf_body_len > 0) { |
| READ_BUF(lrp->lrf_body_len); |
| READMEM(lrp->lrf_body, lrp->lrf_body_len); |
| } |
| } else { |
| lrp->lr_seg.offset = 0; |
| lrp->lr_seg.length = NFS4_MAX_UINT64; |
| } |
| |
| DECODE_TAIL; |
| } |
| #endif /* CONFIG_NFSD_PNFS */ |
| |
| static __be32 |
| nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, |
| struct nfsd4_fallocate *fallocate) |
| { |
| DECODE_HEAD; |
| |
| status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid); |
| if (status) |
| return status; |
| |
| READ_BUF(16); |
| p = xdr_decode_hyper(p, &fallocate->falloc_offset); |
| xdr_decode_hyper(p, &fallocate->falloc_length); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) |
| { |
| DECODE_HEAD; |
| |
| status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid); |
| if (status) |
| return status; |
| status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid); |
| if (status) |
| return status; |
| |
| READ_BUF(8 + 8 + 8); |
| p = xdr_decode_hyper(p, &clone->cl_src_pos); |
| p = xdr_decode_hyper(p, &clone->cl_dst_pos); |
| p = xdr_decode_hyper(p, &clone->cl_count); |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) |
| { |
| DECODE_HEAD; |
| unsigned int tmp; |
| |
| status = nfsd4_decode_stateid(argp, ©->cp_src_stateid); |
| if (status) |
| return status; |
| status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid); |
| if (status) |
| return status; |
| |
| READ_BUF(8 + 8 + 8 + 4 + 4 + 4); |
| p = xdr_decode_hyper(p, ©->cp_src_pos); |
| p = xdr_decode_hyper(p, ©->cp_dst_pos); |
| p = xdr_decode_hyper(p, ©->cp_count); |
| copy->cp_consecutive = be32_to_cpup(p++); |
| copy->cp_synchronous = be32_to_cpup(p++); |
| tmp = be32_to_cpup(p); /* Source server list not supported */ |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) |
| { |
| DECODE_HEAD; |
| |
| status = nfsd4_decode_stateid(argp, &seek->seek_stateid); |
| if (status) |
| return status; |
| |
| READ_BUF(8 + 4); |
| p = xdr_decode_hyper(p, &seek->seek_offset); |
| seek->seek_whence = be32_to_cpup(p); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) |
| { |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) |
| { |
| return nfserr_notsupp; |
| } |
| |
| typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); |
| |
| static const nfsd4_dec nfsd4_dec_ops[] = { |
| [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, |
| [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, |
| [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, |
| [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, |
| [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, |
| [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, |
| [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, |
| [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, |
| [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, |
| [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, |
| [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, |
| [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, |
| [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, |
| [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
| [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, |
| [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, |
| [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, |
| [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, |
| [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, |
| [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, |
| [OP_READ] = (nfsd4_dec)nfsd4_decode_read, |
| [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, |
| [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, |
| [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, |
| [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, |
| [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, |
| [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, |
| [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, |
| [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, |
| [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, |
| [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, |
| [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, |
| [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
| [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, |
| [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, |
| |
| /* new operations for NFSv4.1 */ |
| [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, |
| [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, |
| [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, |
| [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, |
| [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, |
| [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, |
| [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
| #ifdef CONFIG_NFSD_PNFS |
| [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, |
| [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, |
| [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, |
| [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, |
| #else |
| [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, |
| #endif |
| [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, |
| [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, |
| [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, |
| [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, |
| [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, |
| |
| /* new operations for NFSv4.2 */ |
| [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, |
| [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, |
| [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, |
| [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, |
| [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, |
| }; |
| |
| 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 __be32 |
| nfsd4_decode_compound(struct nfsd4_compoundargs *argp) |
| { |
| DECODE_HEAD; |
| 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; |
| int i; |
| |
| READ_BUF(4); |
| argp->taglen = be32_to_cpup(p++); |
| READ_BUF(argp->taglen); |
| SAVEMEM(argp->tag, argp->taglen); |
| READ_BUF(8); |
| argp->minorversion = be32_to_cpup(p++); |
| argp->opcnt = be32_to_cpup(p++); |
| max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); |
| |
| if (argp->taglen > NFSD4_MAX_TAGLEN) |
| goto xdr_error; |
| /* |
| * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS |
| * here, so we return success at the xdr level so that |
| * nfsd4_proc can handle this is an NFS-level error. |
| */ |
| if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND) |
| return 0; |
| |
| if (argp->opcnt > ARRAY_SIZE(argp->iops)) { |
| argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); |
| if (!argp->ops) { |
| argp->ops = argp->iops; |
| dprintk("nfsd: couldn't allocate room for COMPOUND\n"); |
| goto xdr_error; |
| } |
| } |
| |
| if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) |
| argp->opcnt = 0; |
| |
| for (i = 0; i < argp->opcnt; i++) { |
| op = &argp->ops[i]; |
| op->replay = NULL; |
| |
| READ_BUF(4); |
| op->opnum = be32_to_cpup(p++); |
| |
| if (nfsd4_opnum_in_range(argp, op)) |
| op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); |
| else { |
| op->opnum = OP_ILLEGAL; |
| op->status = nfserr_op_illegal; |
| } |
| op->opdesc = OPDESC(op); |
| /* |
| * 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) { |
| 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; |
| |
| if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) |
| clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode, |
| struct svc_export *exp) |
| { |
| if (exp->ex_flags & NFSEXP_V4ROOT) { |
| *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time)); |
| *p++ = 0; |
| } else if (IS_I_VERSION(inode)) { |
| p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode)); |
| } else { |
| *p++ = cpu_to_be32(stat->ctime.tv_sec); |
| *p++ = cpu_to_be32(stat->ctime.tv_nsec); |
| } |
| return p; |
| } |
| |
| static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) |
| { |
| *p++ = cpu_to_be32(c->atomic); |
| if (c->change_supported) { |
| p = xdr_encode_hyper(p, c->before_change); |
| p = xdr_encode_hyper(p, c->after_change); |
| } else { |
| *p++ = cpu_to_be32(c->before_ctime_sec); |
| *p++ = cpu_to_be32(c->before_ctime_nsec); |
| *p++ = cpu_to_be32(c->after_ctime_sec); |
| *p++ = cpu_to_be32(c->after_ctime_nsec); |
| } |
| return p; |
| } |
| |
| /* 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); |
| } |
| |
| /* |
| * encode a location element of a fs_locations structure |
| */ |
| 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 0; |
| } |
| |
| /* |
| * Encode a path in RFC3530 'pathname4' format |
| */ |
| static __be32 nfsd4_encode_path(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_fsloc_fsroot(struct xdr_stream *xdr, |
| struct svc_rqst *rqstp, const struct path *path) |
| { |
| struct svc_export *exp_ps; |
| __be32 res; |
| |
| exp_ps = rqst_find_fsidzero_export(rqstp); |
| if (IS_ERR(exp_ps)) |
| return nfserrno(PTR_ERR(exp_ps)); |
| res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); |
| exp_put(exp_ps); |
| return res; |
| } |
| |
| /* |
| * encode a fs_locations structure |
| */ |
| static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, |
| struct svc_rqst *rqstp, struct svc_export *exp) |
| { |
| __be32 status; |
| int i; |
| __be32 *p; |
| struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; |
| |
| status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); |
| if (status) |
| return status; |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(fslocs->locations_count); |
| for (i=0; i<fslocs->locations_count; i++) { |
| status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); |
| if (status) |
| return status; |
| } |
| return 0; |
| } |
| |
| static u32 nfs4_file_type(umode_t mode) |
| { |
| switch (mode & S_IFMT) { |
| case S_IFIFO: return NF4FIFO; |
| case S_IFCHR: return NF4CHR; |
| case S_IFDIR: return NF4DIR; |
| case S_IFBLK: return NF4BLK; |
| case S_IFLNK: return NF4LNK; |
| case S_IFREG: return NF4REG; |
| case S_IFSOCK: return NF4SOCK; |
| default: return NF4BAD; |
| }; |
| } |
| |
| static inline __be32 |
| nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
| struct nfs4_ace *ace) |
| { |
| if (ace->whotype != NFS4_ACL_WHO_NAMED) |
| return nfs4_acl_write_who(xdr, ace->whotype); |
| else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
| return nfsd4_encode_group(xdr, rqstp, ace->who_gid); |
| else |
| return nfsd4_encode_user(xdr, rqstp, ace->who_uid); |
| } |
| |
| static inline __be32 |
| nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) |
| { |
| __be32 *p; |
| unsigned long i = hweight_long(layout_types); |
| |
| p = xdr_reserve_space(xdr, 4 + 4 * i); |
| if (!p) |
| return nfserr_resource; |
| |
| *p++ = cpu_to_be32(i); |
| |
| for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) |
| if (layout_types & (1 << i)) |
| *p++ = cpu_to_be32(i); |
| |
| return 0; |
| } |
| |
| #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 get_parent_attributes(struct svc_export *exp, struct kstat *stat) |
| { |
| struct path path = exp->ex_path; |
| int err; |
| |
| path_get(&path); |
| while (follow_up(&path)) { |
| if (path.dentry != path.mnt->mnt_root) |
| break; |
| } |
| err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); |
| path_put(&path); |
| return err; |
| } |
| |
| static __be32 |
| nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) |
| { |
| __be32 *p; |
| |
| if (bmval2) { |
| p = xdr_reserve_space(xdr, 16); |
| 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, 12); |
| 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, 8); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(1); |
| *p++ = cpu_to_be32(bmval0); |
| } |
| |
| return 0; |
| out_resource: |
| return nfserr_resource; |
| } |
| |
| /* |
| * Note: @fhp can be NULL; in this case, we might have to compose the filehandle |
| * ourselves. |
| */ |
| static __be32 |
| nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, |
| struct svc_export *exp, |
| struct dentry *dentry, u32 *bmval, |
| struct svc_rqst *rqstp, int ignore_crossmnt) |
| { |
| u32 bmval0 = bmval[0]; |
| u32 bmval1 = bmval[1]; |
| u32 bmval2 = bmval[2]; |
| struct kstat stat; |
| struct svc_fh *tempfh = NULL; |
| struct kstatfs statfs; |
| __be32 *p; |
| int starting_len = xdr->buf->len; |
| int attrlen_offset; |
| __be32 attrlen; |
| u32 dummy; |
| u64 dummy64; |
| u32 rdattr_err = 0; |
| __be32 status; |
| int err; |
| struct nfs4_acl *acl = NULL; |
| void *context = NULL; |
| int contextlen; |
| bool contextsupport = false; |
| struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| u32 minorversion = resp->cstate.minorversion; |
| struct path path = { |
| .mnt = exp->ex_path.mnt, |
| .dentry = dentry, |
| }; |
| struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| |
| BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); |
| BUG_ON(!nfsd_attrs_supported(minorversion, bmval)); |
| |
| if (exp->ex_fslocs.migrated) { |
| status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); |
| if (status) |
| goto out; |
| } |
| |
| err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); |
| if (err) |
| goto out_nfserr; |
| if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | |
| FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || |
| (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | |
| FATTR4_WORD1_SPACE_TOTAL))) { |
| err = vfs_statfs(&path, &statfs); |
| if (err) |
| goto out_nfserr; |
| } |
| if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { |
| 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; |
| fhp = tempfh; |
| } |
| if (bmval0 & FATTR4_WORD0_ACL) { |
| err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); |
| if (err == -EOPNOTSUPP) |
| bmval0 &= ~FATTR4_WORD0_ACL; |
| else if (err == -EINVAL) { |
| status = nfserr_attrnotsupp; |
| goto out; |
| } else if (err != 0) |
| goto out_nfserr; |
| } |
| |
| #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || |
| bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { |
| if (exp->ex_flags & NFSEXP_SECURITY_LABEL) |
| err = security_inode_getsecctx(d_inode(dentry), |
| &context, &contextlen); |
| else |
| err = -EOPNOTSUPP; |
| contextsupport = (err == 0); |
| if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
| if (err == -EOPNOTSUPP) |
| bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; |
| else if (err) |
| goto out_nfserr; |
| } |
| } |
| #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ |
| |
| status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); |
| if (status) |
| goto out; |
| |
| attrlen_offset = xdr->buf->len; |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| p++; /* to be backfilled later */ |
| |
| if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { |
| u32 supp[3]; |
| |
| memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); |
| |
| if (!IS_POSIXACL(dentry->d_inode)) |
| supp[0] &= ~FATTR4_WORD0_ACL; |
| if (!contextsupport) |
| supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; |
| if (!supp[2]) { |
| p = xdr_reserve_space(xdr, 12); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(2); |
| *p++ = cpu_to_be32(supp[0]); |
| *p++ = cpu_to_be32(supp[1]); |
| } else { |
| p = xdr_reserve_space(xdr, 16); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(3); |
| *p++ = cpu_to_be32(supp[0]); |
| *p++ = cpu_to_be32(supp[1]); |
| *p++ = cpu_to_be32(supp[2]); |
| } |
| } |
| if (bmval0 & FATTR4_WORD0_TYPE) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| dummy = nfs4_file_type(stat.mode); |
| if (dummy == NF4BAD) { |
| status = nfserr_serverfault; |
| goto out; |
| } |
| *p++ = cpu_to_be32(dummy); |
| } |
| if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) |
| *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); |
| else |
| *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| |
| NFS4_FH_VOL_RENAME); |
| } |
| if (bmval0 & FATTR4_WORD0_CHANGE) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = encode_change(p, &stat, d_inode(dentry), exp); |
| } |
| if (bmval0 & FATTR4_WORD0_SIZE) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, stat.size); |
| } |
| if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(0); |
| } |
| if (bmval0 & FATTR4_WORD0_FSID) { |
| p = xdr_reserve_space(xdr, 16); |
| if (!p) |
| goto out_resource; |
| if (exp->ex_fslocs.migrated) { |
| p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); |
| p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); |
| } else switch(fsid_source(fhp)) { |
| case FSIDSOURCE_FSID: |
| p = xdr_encode_hyper(p, (u64)exp->ex_fsid); |
| p = xdr_encode_hyper(p, (u64)0); |
| break; |
| case FSIDSOURCE_DEV: |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(MAJOR(stat.dev)); |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(MINOR(stat.dev)); |
| break; |
| case FSIDSOURCE_UUID: |
| p = xdr_encode_opaque_fixed(p, exp->ex_uuid, |
| EX_UUID_LEN); |
| break; |
| } |
| } |
| if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(0); |
| } |
| if (bmval0 & FATTR4_WORD0_LEASE_TIME) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(nn->nfsd4_lease); |
| } |
| if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(rdattr_err); |
| } |
| if (bmval0 & FATTR4_WORD0_ACL) { |
| struct nfs4_ace *ace; |
| |
| if (acl == NULL) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| |
| *p++ = cpu_to_be32(0); |
| goto out_acl; |
| } |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(acl->naces); |
| |
| for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { |
| p = xdr_reserve_space(xdr, 4*3); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(ace->type); |
| *p++ = cpu_to_be32(ace->flag); |
| *p++ = cpu_to_be32(ace->access_mask & |
| NFS4_ACE_MASK_ALL); |
| status = nfsd4_encode_aclname(xdr, rqstp, ace); |
| if (status) |
| goto out; |
| } |
| } |
| out_acl: |
| if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? |
| ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); |
| } |
| if (bmval0 & FATTR4_WORD0_CANSETTIME) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(0); |
| } |
| if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_FILEHANDLE) { |
| p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, |
| fhp->fh_handle.fh_size); |
| } |
| if (bmval0 & FATTR4_WORD0_FILEID) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, stat.ino); |
| } |
| if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
| } |
| if (bmval0 & FATTR4_WORD0_FILES_FREE) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
| } |
| if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, (u64) statfs.f_files); |
| } |
| if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { |
| status = nfsd4_encode_fs_locations(xdr, rqstp, exp); |
| if (status) |
| goto out; |
| } |
| if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXLINK) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(255); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXNAME) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(statfs.f_namelen); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXREAD) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXWRITE) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
| } |
| if (bmval1 & FATTR4_WORD1_MODE) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(stat.mode & S_IALLUGO); |
| } |
| if (bmval1 & FATTR4_WORD1_NO_TRUNC) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(1); |
| } |
| if (bmval1 & FATTR4_WORD1_NUMLINKS) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(stat.nlink); |
| } |
| if (bmval1 & FATTR4_WORD1_OWNER) { |
| status = nfsd4_encode_user(xdr, rqstp, stat.uid); |
| if (status) |
| goto out; |
| } |
| if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { |
| status = nfsd4_encode_group(xdr, rqstp, stat.gid); |
| if (status) |
| goto out; |
| } |
| if (bmval1 & FATTR4_WORD1_RAWDEV) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); |
| *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); |
| } |
| if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; |
| p = xdr_encode_hyper(p, dummy64); |
| } |
| if (bmval1 & FATTR4_WORD1_SPACE_FREE) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; |
| p = xdr_encode_hyper(p, dummy64); |
| } |
| if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; |
| p = xdr_encode_hyper(p, dummy64); |
| } |
| if (bmval1 & FATTR4_WORD1_SPACE_USED) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| dummy64 = (u64)stat.blocks << 9; |
| p = xdr_encode_hyper(p, dummy64); |
| } |
| if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { |
| p = xdr_reserve_space(xdr, 12); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); |
| *p++ = cpu_to_be32(stat.atime.tv_nsec); |
| } |
| if (bmval1 & FATTR4_WORD1_TIME_DELTA) { |
| p = xdr_reserve_space(xdr, 12); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(1); |
| *p++ = cpu_to_be32(0); |
| } |
| if (bmval1 & FATTR4_WORD1_TIME_METADATA) { |
| p = xdr_reserve_space(xdr, 12); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); |
| *p++ = cpu_to_be32(stat.ctime.tv_nsec); |
| } |
| if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { |
| p = xdr_reserve_space(xdr, 12); |
| if (!p) |
| goto out_resource; |
| p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); |
| *p++ = cpu_to_be32(stat.mtime.tv_nsec); |
| } |
| if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { |
| struct kstat parent_stat; |
| u64 ino = stat.ino; |
| |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| goto out_resource; |
| /* |
| * Get parent's attributes if not ignoring crossmount |
| * and this is the root of a cross-mounted filesystem. |
| */ |
| if (ignore_crossmnt == 0 && |
| dentry == exp->ex_path.mnt->mnt_root) { |
| err = get_parent_attributes(exp, &parent_stat); |
| if (err) |
| goto out_nfserr; |
| ino = parent_stat.ino; |
| } |
| p = xdr_encode_hyper(p, ino); |
| } |
| #ifdef CONFIG_NFSD_PNFS |
| if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { |
| status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); |
| if (status) |
| goto out; |
| } |
| |
| if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { |
| status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); |
| if (status) |
| goto out; |
| } |
| |
| if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto out_resource; |
| *p++ = cpu_to_be32(stat.blksize); |
| } |
| #endif /* CONFIG_NFSD_PNFS */ |
| if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { |
| u32 supp[3]; |
| |
| memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); |
| supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0; |
| supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1; |
| supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2; |
| |
| status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]); |
| if (status) |
| goto out; |
| } |
| |
| if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
| status = nfsd4_encode_security_label(xdr, rqstp, context, |
| contextlen); |
| if (status) |
| goto out; |
| } |
| |
| attrlen = htonl(xdr->buf->len - attrlen_offset - 4); |
| write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); |
| status = nfs_ok; |
| |
| out: |
| #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| if (context) |
| security_release_secctx(context, contextlen); |
| #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ |
| kfree(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_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, |
| ignore_crossmnt); |
| *p = xdr.p; |
| return ret; |
| } |
| |
| static inline int attributes_need_mount(u32 *bmval) |
| { |
| if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) |
| return 1; |
| if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) |
| return 1; |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, 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_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen); |
| if (IS_ERR(dentry)) |
| return nfserrno(PTR_ERR(dentry)); |
| if (d_really_is_negative(dentry)) { |
| /* |
| * we're not holding the i_mutex here, so there's |
| * a window where this directory entry could have gone |
| * away. |
| */ |
| dput(dentry); |
| return nfserr_noent; |
| } |
| |
| exp_get(exp); |
| /* |
| * In the case of a mountpoint, the client may be asking for |
| * attributes that are only properties of the underlying filesystem |
| * as opposed to the cross-mounted file system. In such a case, |
| * we will not follow the cross mount and will fill the attribtutes |
| * directly from the mountpoint dentry. |
| */ |
| if (nfsd_mountpoint(dentry, exp)) { |
| int err; |
| |
| if (!(exp->ex_flags & NFSEXP_V4ROOT) |
| && !attributes_need_mount(cd->rd_bmval)) { |
| ignore_crossmnt = 1; |
| goto out_encode; |
| } |
| /* |
| * Why the heck aren't we just using nfsd_lookup?? |
| * Different "."/".." handling? Something else? |
| * At least, add a comment here to explain.... |
| */ |
| err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); |
| if (err) { |
| nfserr = nfserrno(err); |
| goto out_put; |
| } |
| nfserr = check_nfsd_access(exp, cd->rd_rqstp); |
| if (nfserr) |
| goto out_put; |
| |
| } |
| out_encode: |
| nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, |
| cd->rd_rqstp, ignore_crossmnt); |
| out_put: |
| dput(dentry); |
| exp_put(exp); |
| return nfserr; |
| } |
| |
| static __be32 * |
| nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) |
| { |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 20); |
| if (!p) |
| return NULL; |
| *p++ = htonl(2); |
| *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ |
| *p++ = htonl(0); /* bmval1 */ |
| |
| *p++ = htonl(4); /* attribute length */ |
| *p++ = nfserr; /* no htonl */ |
| return p; |
| } |
| |
| static int |
| nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, |
| loff_t offset, u64 ino, unsigned int d_type) |
| { |
| struct readdir_cd *ccd = ccdv; |
| struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); |
| 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; |
| __be64 wire_offset; |
| __be32 *p; |
| |
| /* In nfsv4, "." and ".." never make it onto the wire.. */ |
| if (name && isdotent(name, namlen)) { |
| cd->common.err = nfs_ok; |
| return 0; |
| } |
| |
| if (cd->cookie_offset) { |
| wire_offset = cpu_to_be64(offset); |
| write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, |
| &wire_offset, 8); |
| } |
| |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| goto fail; |
| *p++ = xdr_one; /* mark entry present */ |
| cookie_offset = xdr->buf->len; |
| p = xdr_reserve_space(xdr, 3*4 + namlen); |
| if (!p) |
| goto fail; |
| p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ |
| p = xdr_encode_array(p, name, namlen); /* name length & name */ |
| |
| nfserr = nfsd4_encode_dirent_fattr(xdr, 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; |
| default: |
| /* |
| * If the client requested the RDATTR_ERROR attribute, |
| * we stuff the error code into this attribute |
| * and continue. If this attribute was not requested, |
| * then in accordance with the spec, we fail the |
| * entire READDIR operation(!) |
| */ |
| if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) |
| goto fail; |
| p = nfsd4_encode_rdattr_error(xdr, nfserr); |
| if (p == NULL) { |
| 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", so |
| * let's always let through the first entry, at least: |
| */ |
| if (!cd->rd_dircount) |
| goto fail; |
| 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); |
| |
| 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_stateid(struct xdr_stream *xdr, stateid_t *sid) |
| { |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, sizeof(stateid_t)); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(sid->si_generation); |
| p = xdr_encode_opaque_fixed(p, &sid->si_opaque, |
| sizeof(stateid_opaque_t)); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(access->ac_supported); |
| *p++ = cpu_to_be32(access->ac_resp_access); |
| return 0; |
| } |
| |
| static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); |
| if (!p) |
| return nfserr_resource; |
| p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, |
| NFS4_MAX_SESSIONID_LEN); |
| *p++ = cpu_to_be32(bcts->dir); |
| /* Upshifting from TCP to RDMA is not supported */ |
| *p++ = cpu_to_be32(0); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| |
| return nfsd4_encode_stateid(xdr, &close->cl_stateid); |
| } |
| |
| |
| static __be32 |
| nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
| if (!p) |
| return nfserr_resource; |
| p = xdr_encode_opaque_fixed(p, commit->co_verf.data, |
| NFS4_VERIFIER_SIZE); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 20); |
| if (!p) |
| return nfserr_resource; |
| encode_cinfo(p, &create->cr_cinfo); |
| nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0], |
| create->cr_bmval[1], create->cr_bmval[2]); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) |
| { |
| struct svc_fh *fhp = getattr->ga_fhp; |
| struct xdr_stream *xdr = &resp->xdr; |
| |
| return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, |
| getattr->ga_bmval, resp->rqstp, 0); |
| } |
| |
| static __be32 |
| nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| struct svc_fh *fhp = *fhpp; |
| unsigned int len; |
| __be32 *p; |
| |
| len = fhp->fh_handle.fh_size; |
| p = xdr_reserve_space(xdr, len + 4); |
| if (!p) |
| return nfserr_resource; |
| p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); |
| return 0; |
| } |
| |
| /* |
| * Including all fields other than the name, a LOCK4denied structure requires |
| * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. |
| */ |
| static __be32 |
| nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) |
| { |
| struct xdr_netobj *conf = &ld->ld_owner; |
| __be32 *p; |
| |
| again: |
| p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); |
| if (!p) { |
| /* |
| * Don't fail to return the result just because we can't |
| * return the conflicting open: |
| */ |
| if (conf->len) { |
| kfree(conf->data); |
| conf->len = 0; |
| conf->data = NULL; |
| goto again; |
| } |
| return nfserr_resource; |
| } |
| p = xdr_encode_hyper(p, ld->ld_start); |
| p = xdr_encode_hyper(p, ld->ld_length); |
| *p++ = cpu_to_be32(ld->ld_type); |
| if (conf->len) { |
| p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); |
| p = xdr_encode_opaque(p, conf->data, conf->len); |
| kfree(conf->data); |
| } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ |
| p = xdr_encode_hyper(p, (u64)0); /* clientid */ |
| *p++ = cpu_to_be32(0); /* length of owner name */ |
| } |
| return nfserr_denied; |
| } |
| |
| static __be32 |
| nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| |
| if (!nfserr) |
| nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); |
| else if (nfserr == nfserr_denied) |
| nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); |
| |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| |
| if (nfserr == nfserr_denied) |
| nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| |
| return nfsd4_encode_stateid(xdr, &locku->lu_stateid); |
| } |
| |
| |
| static __be32 |
| nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 20); |
| if (!p) |
| return nfserr_resource; |
| p = encode_cinfo(p, &link->li_cinfo); |
| return 0; |
| } |
| |
| |
| static __be32 |
| nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); |
| if (nfserr) |
| return nfserr; |
| p = xdr_reserve_space(xdr, 24); |
| if (!p) |
| return nfserr_resource; |
| p = encode_cinfo(p, &open->op_cinfo); |
| *p++ = cpu_to_be32(open->op_rflags); |
| |
| nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], |
| open->op_bmval[2]); |
| if (nfserr) |
| return nfserr; |
| |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| |
| *p++ = cpu_to_be32(open->op_delegate_type); |
| switch (open->op_delegate_type) { |
| case NFS4_OPEN_DELEGATE_NONE: |
| break; |
| case NFS4_OPEN_DELEGATE_READ: |
| nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
| if (nfserr) |
| return nfserr; |
| p = xdr_reserve_space(xdr, 20); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(open->op_recall); |
| |
| /* |
| * TODO: ACE's in delegations |
| */ |
| *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ |
| break; |
| case NFS4_OPEN_DELEGATE_WRITE: |
| nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
| if (nfserr) |
| return nfserr; |
| p = xdr_reserve_space(xdr, 32); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(0); |
| |
| /* |
| * TODO: space_limit's in delegations |
| */ |
| *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); |
| *p++ = cpu_to_be32(~(u32)0); |
| *p++ = cpu_to_be32(~(u32)0); |
| |
| /* |
| * TODO: ACE's in delegations |
| */ |
| *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ |
| break; |
| case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ |
| switch (open->op_why_no_deleg) { |
| case WND4_CONTENTION: |
| case WND4_RESOURCE: |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(open->op_why_no_deleg); |
| /* deleg signaling not supported yet: */ |
| *p++ = cpu_to_be32(0); |
| break; |
| default: |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(open->op_why_no_deleg); |
| } |
| break; |
| default: |
| BUG(); |
| } |
| /* XXX save filehandle here */ |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| |
| return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); |
| } |
| |
| static __be32 |
| nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| |
| return nfsd4_encode_stateid(xdr, &od->od_stateid); |
| } |
| |
| 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; |
| u32 eof; |
| long len; |
| int space_left; |
| __be32 nfserr; |
| __be32 *p = xdr->p - 2; |
| |
| /* Make sure there will be room for padding if needed */ |
| if (xdr->end - xdr->p < 1) |
| return nfserr_resource; |
| |
| len = maxcount; |
| nfserr = nfsd_splice_read(read->rd_rqstp, file, |
| read->rd_offset, &maxcount); |
| if (nfserr) { |
| /* |
| * nfsd_splice_actor may have already messed with the |
| * page length; reset it so as not to confuse |
| * xdr_truncate_encode: |
| */ |
| buf->page_len = 0; |
| return nfserr; |
| } |
| |
| eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, |
| d_inode(read->rd_fhp->fh_dentry)->i_size); |
| |
| *(p++) = htonl(eof); |
| *(p++) = htonl(maxcount); |
| |
| buf->page_len = maxcount; |
| buf->len += maxcount; |
| xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) |
| / PAGE_SIZE; |
| |
| /* Use rest of head for padding and remaining ops: */ |
| buf->tail[0].iov_base = xdr->p; |
| buf->tail[0].iov_len = 0; |
| xdr->iov = buf->tail; |
| if (maxcount&3) { |
| int pad = 4 - (maxcount&3); |
| |
| *(xdr->p++) = 0; |
| |
| buf->tail[0].iov_base += maxcount&3; |
| buf->tail[0].iov_len = pad; |
| buf->len += pad; |
| } |
| |
| 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 0; |
| } |
| |
| 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; |
| u32 eof; |
| int v; |
| int starting_len = xdr->buf->len - 8; |
| long len; |
| int thislen; |
| __be32 nfserr; |
| __be32 tmp; |
| __be32 *p; |
| u32 zzz = 0; |
| int pad; |
| |
| len = maxcount; |
| v = 0; |
| |
| thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); |
| p = xdr_reserve_space(xdr, (thislen+3)&~3); |
| WARN_ON_ONCE(!p); |
| resp->rqstp->rq_vec[v].iov_base = p; |
| resp->rqstp->rq_vec[v].iov_len = thislen; |
| v++; |
| len -= thislen; |
| |
| while (len) { |
| thislen = min_t(long, len, PAGE_SIZE); |
| p = xdr_reserve_space(xdr, (thislen+3)&~3); |
| WARN_ON_ONCE(!p); |
| resp->rqstp->rq_vec[v].iov_base = p; |
| resp->rqstp->rq_vec[v].iov_len = thislen; |
| v++; |
| len -= thislen; |
| } |
| read->rd_vlen = v; |
| |
| len = maxcount; |
| nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, |
| read->rd_vlen, &maxcount); |
| if (nfserr) |
| return nfserr; |
| xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); |
| |
| eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, |
| d_inode(read->rd_fhp->fh_dentry)->i_size); |
| |
| tmp = htonl(eof); |
| write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); |
| tmp = htonl(maxcount); |
| write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); |
| |
| pad = (maxcount&3) ? 4 - (maxcount&3) : 0; |
| write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, |
| &zzz, pad); |
| return 0; |
| |
| } |
| |
| static __be32 |
| nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_read *read) |
| { |
| unsigned long maxcount; |
| struct xdr_stream *xdr = &resp->xdr; |
| struct file *file = read->rd_filp; |
| int starting_len = xdr->buf->len; |
| struct raparms *ra = NULL; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ |
| if (!p) { |
| WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); |
| return nfserr_resource; |
| } |
| if (resp->xdr.buf->page_len && |
| test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { |
| WARN_ON_ONCE(1); |
| return nfserr_resource; |
| } |
| xdr_commit_encode(xdr); |
| |
| maxcount = svc_max_payload(resp->rqstp); |
| maxcount = min_t(unsigned long, maxcount, |
| (xdr->buf->buflen - xdr->buf->len)); |
| maxcount = min_t(unsigned long, maxcount, read->rd_length); |
| |
| if (read->rd_tmp_file) |
| ra = nfsd_init_raparms(file); |
| |
| if (file->f_op->splice_read && |
| test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) |
| nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); |
| else |
| nfserr = nfsd4_encode_readv(resp, read, file, maxcount); |
| |
| if (ra) |
| nfsd_put_raparams(file, ra); |
| |
| if (nfserr) |
| xdr_truncate_encode(xdr, starting_len); |
| |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) |
| { |
| int maxcount; |
| __be32 wire_count; |
| int zero = 0; |
| struct xdr_stream *xdr = &resp->xdr; |
| int length_offset = xdr->buf->len; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 4); |
| if (!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) { |
| xdr_truncate_encode(xdr, length_offset); |
| return nfserr; |
| } |
| |
| wire_count = htonl(maxcount); |
| write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); |
| xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); |
| if (maxcount & 3) |
| write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, |
| &zero, 4 - (maxcount&3)); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) |
| { |
| int maxcount; |
| int bytes_left; |
| loff_t offset; |
| __be64 wire_offset; |
| struct xdr_stream *xdr = &resp->xdr; |
| int starting_len = xdr->buf->len; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
| if (!p) |
| return nfserr_resource; |
| |
| /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(0); |
| resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) |
| - (char *)resp->xdr.buf->head[0].iov_base; |
| |
| /* |
| * 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 - 8; |
| if (bytes_left < 0) { |
| nfserr = nfserr_resource; |
| goto err_no_verf; |
| } |
| maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); |
| /* |
| * Note the rfc defines rd_maxcount as the size of the |
| * READDIR4resok structure, which includes the verifier above |
| * and the 8 bytes encoded at the end of this function: |
| */ |
| if (maxcount < 16) { |
| nfserr = nfserr_toosmall; |
| goto err_no_verf; |
| } |
| maxcount = min_t(int, maxcount-16, bytes_left); |
| |
| /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ |
| if (!readdir->rd_dircount) |
| readdir->rd_dircount = INT_MAX; |
| |
| readdir->xdr = xdr; |
| readdir->rd_maxcount = maxcount; |
| readdir->common.err = 0; |
| readdir->cookie_offset = 0; |
| |
| offset = readdir->rd_cookie; |
| nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, |
| &offset, |
| &readdir->common, nfsd4_encode_dirent); |
| if (nfserr == nfs_ok && |
| readdir->common.err == nfserr_toosmall && |
| xdr->buf->len == starting_len + 8) { |
| /* nothing encoded; which limit did we hit?: */ |
| if (maxcount - 16 < bytes_left) |
| /* It was the fault of rd_maxcount: */ |
| nfserr = nfserr_toosmall; |
| else |
| /* We ran out of buffer space: */ |
| nfserr = nfserr_resource; |
| } |
| if (nfserr) |
| goto err_no_verf; |
| |
| if (readdir->cookie_offset) { |
| wire_offset = cpu_to_be64(offset); |
| write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, |
| &wire_offset, 8); |
| } |
| |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) { |
| WARN_ON_ONCE(1); |
| goto err_no_verf; |
| } |
| *p++ = 0; /* no more entries */ |
| *p++ = htonl(readdir->common.err == nfserr_eof); |
| |
| return 0; |
| err_no_verf: |
| xdr_truncate_encode(xdr, starting_len); |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 20); |
| if (!p) |
| return nfserr_resource; |
| p = encode_cinfo(p, &remove->rm_cinfo); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 40); |
| if (!p) |
| return nfserr_resource; |
| p = encode_cinfo(p, &rename->rn_sinfo); |
| p = encode_cinfo(p, &rename->rn_tinfo); |
| return 0; |
| } |
| |
| 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]; |
| __be32 *p, *flavorsp; |
| static bool report = true; |
| |
| 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; |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| flavorsp = p++; /* to be backfilled later */ |
| |
| 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++; |
| p = xdr_reserve_space(xdr, 4 + 4 + |
| XDR_LEN(info.oid.len) + 4 + 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(RPC_AUTH_GSS); |
| p = xdr_encode_opaque(p, info.oid.data, info.oid.len); |
| *p++ = cpu_to_be32(info.qop); |
| *p++ = cpu_to_be32(info.service); |
| } else if (pf < RPC_AUTH_MAXFLAVOR) { |
| supported++; |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(pf); |
| } else { |
| if (report) |
| pr_warn("NFS: SECINFO: security flavor %u " |
| "is not supported\n", pf); |
| } |
| } |
| |
| if (nflavs != supported) |
| report = false; |
| *flavorsp = htonl(supported); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_secinfo *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, |
| struct nfsd4_secinfo_no_name *secinfo) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| |
| return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp); |
| } |
| |
| /* |
| * The SETATTR encode routine is special -- it always encodes a bitmap, |
| * regardless of the error status. |
| */ |
| static __be32 |
| nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 16); |
| if (!p) |
| return nfserr_resource; |
| if (nfserr) { |
| *p++ = cpu_to_be32(3); |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(0); |
| } |
| else { |
| *p++ = cpu_to_be32(3); |
| *p++ = cpu_to_be32(setattr->sa_bmval[0]); |
| *p++ = cpu_to_be32(setattr->sa_bmval[1]); |
| *p++ = cpu_to_be32(setattr->sa_bmval[2]); |
| } |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| if (!nfserr) { |
| p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); |
| if (!p) |
| return nfserr_resource; |
| p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); |
| p = xdr_encode_opaque_fixed(p, &scd->se_confirm, |
| NFS4_VERIFIER_SIZE); |
| } |
| else if (nfserr == nfserr_clid_inuse) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(0); |
| *p++ = cpu_to_be32(0); |
| } |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 16); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(write->wr_bytes_written); |
| *p++ = cpu_to_be32(write->wr_how_written); |
| p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, |
| NFS4_VERIFIER_SIZE); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_exchange_id *exid) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| char *major_id; |
| char *server_scope; |
| int major_id_sz; |
| int server_scope_sz; |
| uint64_t minor_id = 0; |
| |
| major_id = utsname()->nodename; |
| major_id_sz = strlen(major_id); |
| server_scope = utsname()->nodename; |
| server_scope_sz = strlen(server_scope); |
| |
| p = xdr_reserve_space(xdr, |
| 8 /* eir_clientid */ + |
| 4 /* eir_sequenceid */ + |
| 4 /* eir_flags */ + |
| 4 /* spr_how */); |
| if (!p) |
| return nfserr_resource; |
| |
| p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); |
| *p++ = cpu_to_be32(exid->seqid); |
| *p++ = cpu_to_be32(exid->flags); |
| |
| *p++ = cpu_to_be32(exid->spa_how); |
| |
| switch (exid->spa_how) { |
| case SP4_NONE: |
| break; |
| case SP4_MACH_CRED: |
| /* spo_must_enforce bitmap: */ |
| nfserr = nfsd4_encode_bitmap(xdr, |
| exid->spo_must_enforce[0], |
| exid->spo_must_enforce[1], |
| exid->spo_must_enforce[2]); |
| if (nfserr) |
| return nfserr; |
| /* spo_must_allow bitmap: */ |
| nfserr = nfsd4_encode_bitmap(xdr, |
| exid->spo_must_allow[0], |
| exid->spo_must_allow[1], |
| exid->spo_must_allow[2]); |
| if (nfserr) |
| return nfserr; |
| break; |
| default: |
| WARN_ON_ONCE(1); |
| } |
| |
| p = xdr_reserve_space(xdr, |
| 8 /* so_minor_id */ + |
| 4 /* so_major_id.len */ + |
| (XDR_QUADLEN(major_id_sz) * 4) + |
| 4 /* eir_server_scope.len */ + |
| (XDR_QUADLEN(server_scope_sz) * 4) + |
| 4 /* eir_server_impl_id.count (0) */); |
| if (!p) |
| return nfserr_resource; |
| |
| /* The server_owner struct */ |
| p = xdr_encode_hyper(p, minor_id); /* Minor id */ |
| /* major id */ |
| p = xdr_encode_opaque(p, major_id, major_id_sz); |
| |
| /* Server scope */ |
| p = xdr_encode_opaque(p, server_scope, server_scope_sz); |
| |
| /* Implementation id */ |
| *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_create_session *sess) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 24); |
| if (!p) |
| return nfserr_resource; |
| p = xdr_encode_opaque_fixed(p, sess->sessionid.data, |
| NFS4_MAX_SESSIONID_LEN); |
| *p++ = cpu_to_be32(sess->seqid); |
| *p++ = cpu_to_be32(sess->flags); |
| |
| p = xdr_reserve_space(xdr, 28); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(0); /* headerpadsz */ |
| *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); |
| *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); |
| *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); |
| *p++ = cpu_to_be32(sess->fore_channel.maxops); |
| *p++ = cpu_to_be32(sess->fore_channel.maxreqs); |
| *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); |
| |
| if (sess->fore_channel.nr_rdma_attrs) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); |
| } |
| |
| p = xdr_reserve_space(xdr, 28); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(0); /* headerpadsz */ |
| *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); |
| *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); |
| *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); |
| *p++ = cpu_to_be32(sess->back_channel.maxops); |
| *p++ = cpu_to_be32(sess->back_channel.maxreqs); |
| *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); |
| |
| if (sess->back_channel.nr_rdma_attrs) { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); |
| } |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_sequence *seq) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); |
| if (!p) |
| return nfserr_resource; |
| p = xdr_encode_opaque_fixed(p, seq->sessionid.data, |
| NFS4_MAX_SESSIONID_LEN); |
| *p++ = cpu_to_be32(seq->seqid); |
| *p++ = cpu_to_be32(seq->slotid); |
| /* Note slotid's are numbered from zero: */ |
| *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ |
| *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ |
| *p++ = cpu_to_be32(seq->status_flags); |
| |
| resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_test_stateid *test_stateid) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| struct nfsd4_test_stateid_id *stateid, *next; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); |
| if (!p) |
| return nfserr_resource; |
| *p++ = htonl(test_stateid->ts_num_ids); |
| |
| list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { |
| *p++ = stateid->ts_id_status; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_NFSD_PNFS |
| static __be32 |
| nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_getdeviceinfo *gdev) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| const struct nfsd4_layout_ops *ops; |
| u32 starting_len = xdr->buf->len, needed_len; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| |
| *p++ = cpu_to_be32(gdev->gd_layout_type); |
| |
| /* If maxcount is 0 then just update notifications */ |
| if (gdev->gd_maxcount != 0) { |
| ops = nfsd4_layout_ops[gdev->gd_layout_type]; |
| nfserr = ops->encode_getdeviceinfo(xdr, gdev); |
| if (nfserr) { |
| /* |
| * We don't bother to 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 + 4 > gdev->gd_maxcount) |
| goto toosmall; |
| return nfserr; |
| } |
| } |
| |
| if (gdev->gd_notify_types) { |
| p = xdr_reserve_space(xdr, 4 + 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(1); /* bitmap length */ |
| *p++ = cpu_to_be32(gdev->gd_notify_types); |
| } else { |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = 0; |
| } |
| |
| return 0; |
| toosmall: |
| dprintk("%s: maxcount too small\n", __func__); |
| needed_len = xdr->buf->len + 4 /* notifications */; |
| xdr_truncate_encode(xdr, starting_len); |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(needed_len); |
| return nfserr_toosmall; |
| } |
| |
| static __be32 |
| nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_layoutget *lgp) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| const struct nfsd4_layout_ops *ops; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); |
| if (!p) |
| return nfserr_resource; |
| |
| *p++ = cpu_to_be32(1); /* we always set return-on-close */ |
| *p++ = cpu_to_be32(lgp->lg_sid.si_generation); |
| p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, |
| sizeof(stateid_opaque_t)); |
| |
| *p++ = cpu_to_be32(1); /* we always return a single layout */ |
| p = xdr_encode_hyper(p, lgp->lg_seg.offset); |
| p = xdr_encode_hyper(p, lgp->lg_seg.length); |
| *p++ = cpu_to_be32(lgp->lg_seg.iomode); |
| *p++ = cpu_to_be32(lgp->lg_layout_type); |
| |
| ops = nfsd4_layout_ops[lgp->lg_layout_type]; |
| return ops->encode_layoutget(xdr, lgp); |
| } |
| |
| static __be32 |
| nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_layoutcommit *lcp) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(lcp->lc_size_chg); |
| if (lcp->lc_size_chg) { |
| p = xdr_reserve_space(xdr, 8); |
| if (!p) |
| return nfserr_resource; |
| p = xdr_encode_hyper(p, lcp->lc_newsize); |
| } |
| |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_layoutreturn *lrp) |
| { |
| struct xdr_stream *xdr = &resp->xdr; |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 4); |
| if (!p) |
| return nfserr_resource; |
| *p++ = cpu_to_be32(lrp->lrs_present); |
| if (lrp->lrs_present) |
| return nfsd4_encode_stateid(xdr, &lrp->lr_sid); |
| return 0; |
| } |
| #endif /* CONFIG_NFSD_PNFS */ |
| |
| static __be32 |
| nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write) |
| { |
| __be32 *p; |
| |
| p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE); |
| if (!p) |
| return nfserr_resource; |
| |
| *p++ = cpu_to_be32(0); |
| p = xdr_encode_hyper(p, write->wr_bytes_written); |
| *p++ = cpu_to_be32(write->wr_stable_how); |
| p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, |
| NFS4_VERIFIER_SIZE); |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_copy *copy) |
| { |
| __be32 *p; |
| |
| nfserr = nfsd42_encode_write_res(resp, ©->cp_res); |
| if (nfserr) |
| return nfserr; |
| |
| p = xdr_reserve_space(&resp->xdr, 4 + 4); |
| *p++ = cpu_to_be32(copy->cp_consecutive); |
| *p++ = cpu_to_be32(copy->cp_synchronous); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_seek *seek) |
| { |
| __be32 *p; |
| |
| p = xdr_reserve_space(&resp->xdr, 4 + 8); |
| *p++ = cpu_to_be32(seek->seek_eof); |
| p = xdr_encode_hyper(p, seek->seek_pos); |
| |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) |
| { |
| return nfserr; |
| } |
| |
| typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); |
| |
| /* |
| * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 |
| * since we don't need to filter out obsolete ops as this is |
| * done in the decoding phase. |
| */ |
| static const nfsd4_enc nfsd4_enc_ops[] = { |
| [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, |
| [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, |
| [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, |
| [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, |
| [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, |
| [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, |
| [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, |
| [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, |
| [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, |
| [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, |
| [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, |
| [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, |
| [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, |
| [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_READ] = (nfsd4_enc)nfsd4_encode_read, |
| [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, |
| [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, |
| [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, |
| [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, |
| [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, |
| [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, |
| [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, |
| [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, |
| [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, |
| |
| /* NFSv4.1 operations */ |
| [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, |
| [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, |
| [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, |
| [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
| #ifdef CONFIG_NFSD_PNFS |
| [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, |
| [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, |
| [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, |
| [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, |
| #else |
| [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, |
| #endif |
| [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, |
| [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, |
| [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, |
| [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, |
| |
| /* NFSv4.2 operations */ |
| [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, |
| [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, |
| [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, |
| }; |
| |
| /* |
| * 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) { |
| WARN_ON_ONCE(1); |
| return; |
| } |
| *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 < 0 || 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 (opdesc && opdesc->op_release) |
| opdesc->op_release(&op->u); |
| 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: |
| /* Note that op->status is already in network byte order: */ |
| write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); |
| } |
| |
| /* |
| * 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; |
| |
| BUG_ON(!rp); |
| |
| 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); |
| } |
| |
| int |
| nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p) |
| { |
| return xdr_ressize_check(rqstp, p); |
| } |
| |
| void nfsd4_release_compoundargs(struct svc_rqst *rqstp) |
| { |
| struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| |
| if (args->ops != args->iops) { |
| kfree(args->ops); |
| args->ops = args->iops; |
| } |
| kfree(args->tmpp); |
| args->tmpp = NULL; |
| while (args->to_free) { |
| struct svcxdr_tmpbuf *tb = args->to_free; |
| args->to_free = tb->next; |
| kfree(tb); |
| } |
| } |
| |
| int |
| nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p) |
| { |
| struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| |
| if (rqstp->rq_arg.head[0].iov_len % 4) { |
| /* client is nuts */ |
| dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", |
| __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); |
| return 0; |
| } |
| args->p = p; |
| args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; |
| args->pagelist = rqstp->rq_arg.pages; |
| args->pagelen = rqstp->rq_arg.page_len; |
| args->tail = false; |
| args->tmpp = NULL; |
| args->to_free = NULL; |
| args->ops = args->iops; |
| args->rqstp = rqstp; |
| |
| return !nfsd4_decode_compound(args); |
| } |
| |
| int |
| nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p) |
| { |
| /* |
| * All that remains is to write the tag and operation count... |
| */ |
| struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| struct xdr_buf *buf = resp->xdr.buf; |
| |
| WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + |
| buf->tail[0].iov_len); |
| |
| rqstp->rq_next_page = resp->xdr.page_ptr + 1; |
| |
| p = resp->tagp; |
| *p++ = htonl(resp->taglen); |
| memcpy(p, resp->tag, resp->taglen); |
| p += XDR_QUADLEN(resp->taglen); |
| *p++ = htonl(resp->opcnt); |
| |
| nfsd4_sequence_done(resp); |
| return 1; |
| } |
| |
| /* |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |