| /* |
| * Server-side XDR for NFSv4 |
| * |
| * Copyright (c) 2002 The Regents of the University of Michigan. |
| * All rights reserved. |
| * |
| * Kendrick Smith <kmsmith@umich.edu> |
| * Andy Adamson <andros@umich.edu> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * TODO: Neil Brown made the following observation: We currently |
| * initially reserve NFSD_BUFSIZE space on the transmit queue and |
| * never release any of that until the request is complete. |
| * It would be good to calculate a new maximum response size while |
| * decoding the COMPOUND, and call svc_reserve with this number |
| * at the end of nfs4svc_decode_compoundargs. |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/namei.h> |
| #include <linux/statfs.h> |
| #include <linux/utsname.h> |
| #include <linux/pagemap.h> |
| #include <linux/sunrpc/svcauth_gss.h> |
| |
| #include "idmap.h" |
| #include "acl.h" |
| #include "xdr4.h" |
| #include "vfs.h" |
| #include "state.h" |
| #include "cache.h" |
| #include "netns.h" |
| |
| #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| #include <linux/security.h> |
| #endif |
| |
| |
| #define NFSDDBG_FACILITY NFSDDBG_XDR |
| |
| /* |
| * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing |
| * directory in order to indicate to the client that a filesystem boundary is present |
| * We use a fixed fsid for a referral |
| */ |
| #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL |
| #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL |
| |
| static __be32 |
| check_filename(char *str, int len) |
| { |
| 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 READ32(x) (x) = ntohl(*p++) |
| #define READ64(x) do { \ |
| (x) = (u64)ntohl(*p++) << 32; \ |
| (x) |= ntohl(*p++); \ |
| } while (0) |
| #define READMEM(x,nbytes) do { \ |
| x = (char *)p; \ |
| p += XDR_QUADLEN(nbytes); \ |
| } while (0) |
| #define SAVEMEM(x,nbytes) do { \ |
| if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ |
| savemem(argp, p, nbytes) : \ |
| (char *)p)) { \ |
| dprintk("NFSD: xdr error (%s:%d)\n", \ |
| __FILE__, __LINE__); \ |
| goto xdr_error; \ |
| } \ |
| p += XDR_QUADLEN(nbytes); \ |
| } while (0) |
| #define COPYMEM(x,nbytes) do { \ |
| memcpy((x), p, nbytes); \ |
| p += XDR_QUADLEN(nbytes); \ |
| } while (0) |
| |
| /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ |
| #define READ_BUF(nbytes) do { \ |
| if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ |
| p = argp->p; \ |
| argp->p += XDR_QUADLEN(nbytes); \ |
| } else if (!(p = read_buf(argp, nbytes))) { \ |
| dprintk("NFSD: xdr error (%s:%d)\n", \ |
| __FILE__, __LINE__); \ |
| goto xdr_error; \ |
| } \ |
| } while (0) |
| |
| static 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 + (argp->pagelen>>2); |
| 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 (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); |
| } |
| |
| /** |
| * defer_free - mark an allocation as deferred freed |
| * @argp: NFSv4 compound argument structure to be freed with |
| * @release: release callback to free @p, typically kfree() |
| * @p: pointer to be freed |
| * |
| * Marks @p to be freed when processing the compound operation |
| * described in @argp finishes. |
| */ |
| static int |
| defer_free(struct nfsd4_compoundargs *argp, |
| void (*release)(const void *), void *p) |
| { |
| struct tmpbuf *tb; |
| |
| tb = kmalloc(sizeof(*tb), GFP_KERNEL); |
| if (!tb) |
| return -ENOMEM; |
| tb->buf = p; |
| tb->release = release; |
| tb->next = argp->to_free; |
| argp->to_free = tb; |
| return 0; |
| } |
| |
| /** |
| * 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) |
| { |
| if (p == argp->tmp) { |
| p = kmemdup(argp->tmp, nbytes, GFP_KERNEL); |
| if (!p) |
| return NULL; |
| } else { |
| BUG_ON(p != argp->tmpp); |
| argp->tmpp = NULL; |
| } |
| if (defer_free(argp, kfree, p)) { |
| kfree(p); |
| return NULL; |
| } else |
| return (char *)p; |
| } |
| |
| static __be32 |
| nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) |
| { |
| u32 bmlen; |
| DECODE_HEAD; |
| |
| bmval[0] = 0; |
| bmval[1] = 0; |
| bmval[2] = 0; |
| |
| READ_BUF(4); |
| READ32(bmlen); |
| if (bmlen > 1000) |
| goto xdr_error; |
| |
| READ_BUF(bmlen << 2); |
| if (bmlen > 0) |
| READ32(bmval[0]); |
| if (bmlen > 1) |
| READ32(bmval[1]); |
| if (bmlen > 2) |
| READ32(bmval[2]); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, |
| struct iattr *iattr, struct nfs4_acl **acl, |
| struct xdr_netobj *label) |
| { |
| int expected_len, len = 0; |
| u32 dummy32; |
| char *buf; |
| |
| DECODE_HEAD; |
| iattr->ia_valid = 0; |
| if ((status = nfsd4_decode_bitmap(argp, bmval))) |
| return status; |
| |
| READ_BUF(4); |
| READ32(expected_len); |
| |
| if (bmval[0] & FATTR4_WORD0_SIZE) { |
| READ_BUF(8); |
| len += 8; |
| READ64(iattr->ia_size); |
| iattr->ia_valid |= ATTR_SIZE; |
| } |
| if (bmval[0] & FATTR4_WORD0_ACL) { |
| u32 nace; |
| struct nfs4_ace *ace; |
| |
| READ_BUF(4); len += 4; |
| READ32(nace); |
| |
| if (nace > NFS4_ACL_MAX) |
| return nfserr_resource; |
| |
| *acl = nfs4_acl_new(nace); |
| if (*acl == NULL) |
| return nfserr_jukebox; |
| |
| defer_free(argp, kfree, *acl); |
| |
| (*acl)->naces = nace; |
| for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { |
| READ_BUF(16); len += 16; |
| READ32(ace->type); |
| READ32(ace->flag); |
| READ32(ace->access_mask); |
| READ32(dummy32); |
| READ_BUF(dummy32); |
| len += XDR_QUADLEN(dummy32) << 2; |
| READMEM(buf, dummy32); |
| ace->whotype = nfs4_acl_get_whotype(buf, dummy32); |
| status = nfs_ok; |
| if (ace->whotype != NFS4_ACL_WHO_NAMED) |
| ; |
| 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; |
| READ32(iattr->ia_mode); |
| iattr->ia_mode &= (S_IFMT | S_IALLUGO); |
| iattr->ia_valid |= ATTR_MODE; |
| } |
| if (bmval[1] & FATTR4_WORD1_OWNER) { |
| READ_BUF(4); |
| len += 4; |
| READ32(dummy32); |
| READ_BUF(dummy32); |
| len += (XDR_QUADLEN(dummy32) << 2); |
| READMEM(buf, dummy32); |
| if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) |
| return status; |
| iattr->ia_valid |= ATTR_UID; |
| } |
| if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { |
| READ_BUF(4); |
| len += 4; |
| READ32(dummy32); |
| READ_BUF(dummy32); |
| len += (XDR_QUADLEN(dummy32) << 2); |
| READMEM(buf, dummy32); |
| if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) |
| return status; |
| iattr->ia_valid |= ATTR_GID; |
| } |
| if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { |
| READ_BUF(4); |
| len += 4; |
| READ32(dummy32); |
| switch (dummy32) { |
| case NFS4_SET_TO_CLIENT_TIME: |
| /* We require the high 32 bits of 'seconds' to be 0, and we ignore |
| all 32 bits of 'nseconds'. */ |
| READ_BUF(12); |
| len += 12; |
| READ64(iattr->ia_atime.tv_sec); |
| READ32(iattr->ia_atime.tv_nsec); |
| if (iattr->ia_atime.tv_nsec >= (u32)1000000000) |
| return nfserr_inval; |
| iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); |
| break; |
| case NFS4_SET_TO_SERVER_TIME: |
| iattr->ia_valid |= ATTR_ATIME; |
| break; |
| default: |
| goto xdr_error; |
| } |
| } |
| if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { |
| READ_BUF(4); |
| len += 4; |
| READ32(dummy32); |
| switch (dummy32) { |
| case NFS4_SET_TO_CLIENT_TIME: |
| /* We require the high 32 bits of 'seconds' to be 0, and we ignore |
| all 32 bits of 'nseconds'. */ |
| READ_BUF(12); |
| len += 12; |
| READ64(iattr->ia_mtime.tv_sec); |
| READ32(iattr->ia_mtime.tv_nsec); |
| if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) |
| return nfserr_inval; |
| iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); |
| break; |
| case NFS4_SET_TO_SERVER_TIME: |
| iattr->ia_valid |= ATTR_MTIME; |
| break; |
| default: |
| goto xdr_error; |
| } |
| } |
| |
| label->len = 0; |
| #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { |
| READ_BUF(4); |
| len += 4; |
| READ32(dummy32); /* lfs: we don't use it */ |
| READ_BUF(4); |
| len += 4; |
| READ32(dummy32); /* pi: we don't use it either */ |
| READ_BUF(4); |
| len += 4; |
| READ32(dummy32); |
| READ_BUF(dummy32); |
| if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN) |
| return nfserr_badlabel; |
| len += (XDR_QUADLEN(dummy32) << 2); |
| READMEM(buf, dummy32); |
| label->data = kzalloc(dummy32 + 1, GFP_KERNEL); |
| if (!label->data) |
| return nfserr_jukebox; |
| label->len = dummy32; |
| defer_free(argp, kfree, label->data); |
| memcpy(label->data, buf, dummy32); |
| } |
| #endif |
| |
| if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 |
| || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 |
| || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) |
| READ_BUF(expected_len - len); |
| else if (len != expected_len) |
| goto xdr_error; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(sizeof(stateid_t)); |
| READ32(sid->si_generation); |
| COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(access->ac_req_access); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_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); |
| READ32(nr_secflavs); |
| 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); |
| READ32(dummy); |
| 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 */ |
| READ32(dummy); |
| |
| /* machine name */ |
| READ32(dummy); |
| READ_BUF(dummy); |
| SAVEMEM(machine_name, dummy); |
| |
| /* uid, gid */ |
| READ_BUF(8); |
| READ32(uid); |
| READ32(gid); |
| |
| /* more gids */ |
| READ_BUF(4); |
| READ32(dummy); |
| 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 */ |
| READ32(dummy); |
| /* gcbp_handle_from_server */ |
| READ32(dummy); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| /* gcbp_handle_from_client */ |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy); |
| break; |
| default: |
| dprintk("Illegal callback secflavor\n"); |
| return nfserr_inval; |
| } |
| } |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(bc->bc_cb_program); |
| 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); |
| READ32(bcts->dir); |
| /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker |
| * could help us figure out we should be using it. */ |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(close->cl_seqid); |
| return nfsd4_decode_stateid(argp, &close->cl_stateid); |
| |
| DECODE_TAIL; |
| } |
| |
| |
| static __be32 |
| nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(12); |
| READ64(commit->co_offset); |
| READ32(commit->co_count); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(create->cr_type); |
| switch (create->cr_type) { |
| case NF4LNK: |
| READ_BUF(4); |
| READ32(create->cr_linklen); |
| READ_BUF(create->cr_linklen); |
| SAVEMEM(create->cr_linkname, create->cr_linklen); |
| break; |
| case NF4BLK: |
| case NF4CHR: |
| READ_BUF(8); |
| READ32(create->cr_specdata1); |
| READ32(create->cr_specdata2); |
| break; |
| case NF4SOCK: |
| case NF4FIFO: |
| case NF4DIR: |
| default: |
| break; |
| } |
| |
| READ_BUF(4); |
| READ32(create->cr_namelen); |
| READ_BUF(create->cr_namelen); |
| SAVEMEM(create->cr_name, create->cr_namelen); |
| if ((status = check_filename(create->cr_name, create->cr_namelen))) |
| return status; |
| |
| status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, |
| &create->cr_acl, &create->cr_label); |
| if (status) |
| goto out; |
| |
| DECODE_TAIL; |
| } |
| |
| static inline __be32 |
| nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) |
| { |
| return nfsd4_decode_stateid(argp, &dr->dr_stateid); |
| } |
| |
| static inline __be32 |
| nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) |
| { |
| return nfsd4_decode_bitmap(argp, getattr->ga_bmval); |
| } |
| |
| static __be32 |
| nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(link->li_namelen); |
| READ_BUF(link->li_namelen); |
| SAVEMEM(link->li_name, link->li_namelen); |
| if ((status = check_filename(link->li_name, link->li_namelen))) |
| return status; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) |
| { |
| DECODE_HEAD; |
| |
| /* |
| * type, reclaim(boolean), offset, length, new_lock_owner(boolean) |
| */ |
| READ_BUF(28); |
| READ32(lock->lk_type); |
| if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) |
| goto xdr_error; |
| READ32(lock->lk_reclaim); |
| READ64(lock->lk_offset); |
| READ64(lock->lk_length); |
| READ32(lock->lk_is_new); |
| |
| if (lock->lk_is_new) { |
| READ_BUF(4); |
| READ32(lock->lk_new_open_seqid); |
| status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); |
| if (status) |
| return status; |
| READ_BUF(8 + sizeof(clientid_t)); |
| READ32(lock->lk_new_lock_seqid); |
| COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); |
| READ32(lock->lk_new_owner.len); |
| READ_BUF(lock->lk_new_owner.len); |
| READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); |
| } else { |
| status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); |
| if (status) |
| return status; |
| READ_BUF(4); |
| READ32(lock->lk_old_lock_seqid); |
| } |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(32); |
| READ32(lockt->lt_type); |
| if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) |
| goto xdr_error; |
| READ64(lockt->lt_offset); |
| READ64(lockt->lt_length); |
| COPYMEM(&lockt->lt_clientid, 8); |
| READ32(lockt->lt_owner.len); |
| READ_BUF(lockt->lt_owner.len); |
| READMEM(lockt->lt_owner.data, lockt->lt_owner.len); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(8); |
| READ32(locku->lu_type); |
| if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) |
| goto xdr_error; |
| READ32(locku->lu_seqid); |
| status = nfsd4_decode_stateid(argp, &locku->lu_stateid); |
| if (status) |
| return status; |
| READ_BUF(16); |
| READ64(locku->lu_offset); |
| READ64(locku->lu_length); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(lookup->lo_len); |
| READ_BUF(lookup->lo_len); |
| SAVEMEM(lookup->lo_name, lookup->lo_len); |
| if ((status = check_filename(lookup->lo_name, lookup->lo_len))) |
| return status; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) |
| { |
| __be32 *p; |
| u32 w; |
| |
| READ_BUF(4); |
| READ32(w); |
| *share_access = w & NFS4_SHARE_ACCESS_MASK; |
| *deleg_want = w & NFS4_SHARE_WANT_MASK; |
| if (deleg_when) |
| *deleg_when = w & NFS4_SHARE_WHEN_MASK; |
| |
| switch (w & NFS4_SHARE_ACCESS_MASK) { |
| case NFS4_SHARE_ACCESS_READ: |
| case NFS4_SHARE_ACCESS_WRITE: |
| case NFS4_SHARE_ACCESS_BOTH: |
| break; |
| default: |
| return nfserr_bad_xdr; |
| } |
| w &= ~NFS4_SHARE_ACCESS_MASK; |
| if (!w) |
| return nfs_ok; |
| if (!argp->minorversion) |
| return nfserr_bad_xdr; |
| switch (w & NFS4_SHARE_WANT_MASK) { |
| case NFS4_SHARE_WANT_NO_PREFERENCE: |
| case NFS4_SHARE_WANT_READ_DELEG: |
| case NFS4_SHARE_WANT_WRITE_DELEG: |
| case NFS4_SHARE_WANT_ANY_DELEG: |
| case NFS4_SHARE_WANT_NO_DELEG: |
| case NFS4_SHARE_WANT_CANCEL: |
| break; |
| default: |
| return nfserr_bad_xdr; |
| } |
| w &= ~NFS4_SHARE_WANT_MASK; |
| if (!w) |
| return nfs_ok; |
| |
| if (!deleg_when) /* open_downgrade */ |
| return nfserr_inval; |
| switch (w) { |
| case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: |
| case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: |
| case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | |
| NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): |
| return nfs_ok; |
| } |
| xdr_error: |
| return nfserr_bad_xdr; |
| } |
| |
| static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) |
| { |
| __be32 *p; |
| |
| READ_BUF(4); |
| READ32(*x); |
| /* Note: unlinke access bits, deny bits may be zero. */ |
| if (*x & ~NFS4_SHARE_DENY_BOTH) |
| return nfserr_bad_xdr; |
| return nfs_ok; |
| xdr_error: |
| return nfserr_bad_xdr; |
| } |
| |
| static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) |
| { |
| __be32 *p; |
| |
| READ_BUF(4); |
| READ32(o->len); |
| |
| if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) |
| return nfserr_bad_xdr; |
| |
| READ_BUF(o->len); |
| SAVEMEM(o->data, o->len); |
| return nfs_ok; |
| xdr_error: |
| return nfserr_bad_xdr; |
| } |
| |
| static __be32 |
| nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
| { |
| DECODE_HEAD; |
| u32 dummy; |
| |
| memset(open->op_bmval, 0, sizeof(open->op_bmval)); |
| open->op_iattr.ia_valid = 0; |
| open->op_openowner = NULL; |
| |
| open->op_xdr_error = 0; |
| /* seqid, share_access, share_deny, clientid, ownerlen */ |
| READ_BUF(4); |
| READ32(open->op_seqid); |
| /* decode, yet ignore deleg_when until supported */ |
| status = nfsd4_decode_share_access(argp, &open->op_share_access, |
| &open->op_deleg_want, &dummy); |
| if (status) |
| goto xdr_error; |
| status = nfsd4_decode_share_deny(argp, &open->op_share_deny); |
| if (status) |
| goto xdr_error; |
| READ_BUF(sizeof(clientid_t)); |
| COPYMEM(&open->op_clientid, sizeof(clientid_t)); |
| status = nfsd4_decode_opaque(argp, &open->op_owner); |
| if (status) |
| goto xdr_error; |
| READ_BUF(4); |
| READ32(open->op_create); |
| switch (open->op_create) { |
| case NFS4_OPEN_NOCREATE: |
| break; |
| case NFS4_OPEN_CREATE: |
| READ_BUF(4); |
| READ32(open->op_createmode); |
| switch (open->op_createmode) { |
| case NFS4_CREATE_UNCHECKED: |
| case NFS4_CREATE_GUARDED: |
| status = nfsd4_decode_fattr(argp, open->op_bmval, |
| &open->op_iattr, &open->op_acl, &open->op_label); |
| 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); |
| if (status) |
| goto out; |
| break; |
| default: |
| goto xdr_error; |
| } |
| break; |
| default: |
| goto xdr_error; |
| } |
| |
| /* open_claim */ |
| READ_BUF(4); |
| READ32(open->op_claim_type); |
| switch (open->op_claim_type) { |
| case NFS4_OPEN_CLAIM_NULL: |
| case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
| READ_BUF(4); |
| READ32(open->op_fname.len); |
| READ_BUF(open->op_fname.len); |
| SAVEMEM(open->op_fname.data, open->op_fname.len); |
| if ((status = check_filename(open->op_fname.data, open->op_fname.len))) |
| return status; |
| break; |
| case NFS4_OPEN_CLAIM_PREVIOUS: |
| READ_BUF(4); |
| READ32(open->op_delegate_type); |
| break; |
| case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
| status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); |
| if (status) |
| return status; |
| READ_BUF(4); |
| READ32(open->op_fname.len); |
| READ_BUF(open->op_fname.len); |
| SAVEMEM(open->op_fname.data, open->op_fname.len); |
| if ((status = check_filename(open->op_fname.data, open->op_fname.len))) |
| 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); |
| READ32(open_conf->oc_seqid); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) |
| { |
| DECODE_HEAD; |
| |
| status = nfsd4_decode_stateid(argp, &open_down->od_stateid); |
| if (status) |
| return status; |
| READ_BUF(4); |
| READ32(open_down->od_seqid); |
| status = nfsd4_decode_share_access(argp, &open_down->od_share_access, |
| &open_down->od_deleg_want, NULL); |
| if (status) |
| return status; |
| status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); |
| if (status) |
| return status; |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(putfh->pf_fhlen); |
| if (putfh->pf_fhlen > NFS4_FHSIZE) |
| goto xdr_error; |
| READ_BUF(putfh->pf_fhlen); |
| SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_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); |
| READ64(read->rd_offset); |
| READ32(read->rd_length); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(24); |
| READ64(readdir->rd_cookie); |
| COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); |
| READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ |
| READ32(readdir->rd_maxcount); |
| if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) |
| goto out; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(remove->rm_namelen); |
| READ_BUF(remove->rm_namelen); |
| SAVEMEM(remove->rm_name, remove->rm_namelen); |
| if ((status = check_filename(remove->rm_name, remove->rm_namelen))) |
| return status; |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(rename->rn_snamelen); |
| READ_BUF(rename->rn_snamelen + 4); |
| SAVEMEM(rename->rn_sname, rename->rn_snamelen); |
| READ32(rename->rn_tnamelen); |
| READ_BUF(rename->rn_tnamelen); |
| SAVEMEM(rename->rn_tname, rename->rn_tnamelen); |
| if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) |
| 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); |
| READ32(secinfo->si_namelen); |
| READ_BUF(secinfo->si_namelen); |
| SAVEMEM(secinfo->si_name, secinfo->si_namelen); |
| status = check_filename(secinfo->si_name, secinfo->si_namelen); |
| if (status) |
| return status; |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, |
| struct nfsd4_secinfo_no_name *sin) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(sin->sin_style); |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) |
| { |
| __be32 status; |
| |
| status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); |
| if (status) |
| return status; |
| return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, |
| &setattr->sa_acl, &setattr->sa_label); |
| } |
| |
| 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); |
| READ32(setclientid->se_callback_prog); |
| READ32(setclientid->se_callback_netid_len); |
| |
| READ_BUF(setclientid->se_callback_netid_len + 4); |
| SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); |
| READ32(setclientid->se_callback_addr_len); |
| |
| READ_BUF(setclientid->se_callback_addr_len + 4); |
| SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); |
| READ32(setclientid->se_callback_ident); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) |
| { |
| DECODE_HEAD; |
| |
| 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); |
| READ32(verify->ve_attrlen); |
| READ_BUF(verify->ve_attrlen); |
| SAVEMEM(verify->ve_attrval, verify->ve_attrlen); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) |
| { |
| int avail; |
| int len; |
| DECODE_HEAD; |
| |
| status = nfsd4_decode_stateid(argp, &write->wr_stateid); |
| if (status) |
| return status; |
| READ_BUF(16); |
| READ64(write->wr_offset); |
| READ32(write->wr_stable_how); |
| if (write->wr_stable_how > 2) |
| goto xdr_error; |
| READ32(write->wr_buflen); |
| |
| /* Sorry .. no magic macros for this.. * |
| * READ_BUF(write->wr_buflen); |
| * SAVEMEM(write->wr_buf, write->wr_buflen); |
| */ |
| avail = (char*)argp->end - (char*)argp->p; |
| if (avail + argp->pagelen < write->wr_buflen) { |
| dprintk("NFSD: xdr error (%s:%d)\n", |
| __FILE__, __LINE__); |
| goto xdr_error; |
| } |
| write->wr_head.iov_base = p; |
| write->wr_head.iov_len = avail; |
| WARN_ON(avail != (XDR_QUADLEN(avail) << 2)); |
| 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; |
| |
| argp->p = (__be32 *)page_address(argp->pagelist[0]); |
| argp->pagelist++; |
| argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); |
| } |
| 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)); |
| READ32(rlockowner->rl_owner.len); |
| READ_BUF(rlockowner->rl_owner.len); |
| READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); |
| |
| if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) |
| return nfserr_inval; |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, |
| struct nfsd4_exchange_id *exid) |
| { |
| int dummy, tmp; |
| DECODE_HEAD; |
| |
| READ_BUF(NFS4_VERIFIER_SIZE); |
| COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); |
| |
| status = nfsd4_decode_opaque(argp, &exid->clname); |
| if (status) |
| return nfserr_bad_xdr; |
| |
| READ_BUF(4); |
| READ32(exid->flags); |
| |
| /* Ignore state_protect4_a */ |
| READ_BUF(4); |
| READ32(exid->spa_how); |
| switch (exid->spa_how) { |
| case SP4_NONE: |
| break; |
| case SP4_MACH_CRED: |
| /* spo_must_enforce */ |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy * 4); |
| p += dummy; |
| |
| /* spo_must_allow */ |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy * 4); |
| p += dummy; |
| break; |
| case SP4_SSV: |
| /* ssp_ops */ |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy * 4); |
| p += dummy; |
| |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy * 4); |
| p += dummy; |
| |
| /* ssp_hash_algs<> */ |
| READ_BUF(4); |
| READ32(tmp); |
| while (tmp--) { |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| } |
| |
| /* ssp_encr_algs<> */ |
| READ_BUF(4); |
| READ32(tmp); |
| while (tmp--) { |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| } |
| |
| /* ssp_window and ssp_num_gss_handles */ |
| READ_BUF(8); |
| READ32(dummy); |
| READ32(dummy); |
| break; |
| default: |
| goto xdr_error; |
| } |
| |
| /* Ignore Implementation ID */ |
| READ_BUF(4); /* nfs_impl_id4 array length */ |
| READ32(dummy); |
| |
| if (dummy > 1) |
| goto xdr_error; |
| |
| if (dummy == 1) { |
| /* nii_domain */ |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| |
| /* nii_name */ |
| READ_BUF(4); |
| READ32(dummy); |
| READ_BUF(dummy); |
| p += XDR_QUADLEN(dummy); |
| |
| /* nii_date */ |
| READ_BUF(12); |
| p += 3; |
| } |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, |
| struct nfsd4_create_session *sess) |
| { |
| DECODE_HEAD; |
| u32 dummy; |
| |
| READ_BUF(16); |
| COPYMEM(&sess->clientid, 8); |
| READ32(sess->seqid); |
| READ32(sess->flags); |
| |
| /* Fore channel attrs */ |
| READ_BUF(28); |
| READ32(dummy); /* headerpadsz is always 0 */ |
| READ32(sess->fore_channel.maxreq_sz); |
| READ32(sess->fore_channel.maxresp_sz); |
| READ32(sess->fore_channel.maxresp_cached); |
| READ32(sess->fore_channel.maxops); |
| READ32(sess->fore_channel.maxreqs); |
| READ32(sess->fore_channel.nr_rdma_attrs); |
| if (sess->fore_channel.nr_rdma_attrs == 1) { |
| READ_BUF(4); |
| READ32(sess->fore_channel.rdma_attrs); |
| } else if (sess->fore_channel.nr_rdma_attrs > 1) { |
| dprintk("Too many fore channel attr bitmaps!\n"); |
| goto xdr_error; |
| } |
| |
| /* Back channel attrs */ |
| READ_BUF(28); |
| READ32(dummy); /* headerpadsz is always 0 */ |
| READ32(sess->back_channel.maxreq_sz); |
| READ32(sess->back_channel.maxresp_sz); |
| READ32(sess->back_channel.maxresp_cached); |
| READ32(sess->back_channel.maxops); |
| READ32(sess->back_channel.maxreqs); |
| READ32(sess->back_channel.nr_rdma_attrs); |
| if (sess->back_channel.nr_rdma_attrs == 1) { |
| READ_BUF(4); |
| READ32(sess->back_channel.rdma_attrs); |
| } else if (sess->back_channel.nr_rdma_attrs > 1) { |
| dprintk("Too many back channel attr bitmaps!\n"); |
| goto xdr_error; |
| } |
| |
| READ_BUF(4); |
| READ32(sess->callback_prog); |
| 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)); |
| READ32(free_stateid->fr_stateid.si_generation); |
| COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, |
| struct nfsd4_sequence *seq) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); |
| COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
| READ32(seq->seqid); |
| READ32(seq->slotid); |
| READ32(seq->maxslots); |
| READ32(seq->cachethis); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) |
| { |
| int i; |
| __be32 *p, status; |
| struct nfsd4_test_stateid_id *stateid; |
| |
| READ_BUF(4); |
| test_stateid->ts_num_ids = ntohl(*p++); |
| |
| INIT_LIST_HEAD(&test_stateid->ts_stateid_list); |
| |
| for (i = 0; i < test_stateid->ts_num_ids; i++) { |
| stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL); |
| if (!stateid) { |
| status = nfserrno(-ENOMEM); |
| goto out; |
| } |
| |
| defer_free(argp, kfree, stateid); |
| INIT_LIST_HEAD(&stateid->ts_id_list); |
| list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); |
| |
| status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); |
| if (status) |
| goto out; |
| } |
| |
| status = 0; |
| out: |
| return status; |
| xdr_error: |
| dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); |
| status = nfserr_bad_xdr; |
| goto out; |
| } |
| |
| static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(8); |
| COPYMEM(&dc->clientid, 8); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) |
| { |
| DECODE_HEAD; |
| |
| READ_BUF(4); |
| READ32(rc->rca_one_fs); |
| |
| DECODE_TAIL; |
| } |
| |
| static __be32 |
| nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) |
| { |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) |
| { |
| return nfserr_notsupp; |
| } |
| |
| typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); |
| |
| static nfsd4_dec nfsd4_dec_ops[] = { |
| [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, |
| [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, |
| [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, |
| [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, |
| [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, |
| [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, |
| [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, |
| [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, |
| [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, |
| [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, |
| [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, |
| [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, |
| [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, |
| [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
| [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, |
| [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, |
| [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, |
| [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, |
| [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_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, |
| [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, |
| [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, |
| [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, |
| [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
| [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, |
| [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, |
| }; |
| |
| 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; |
| } |
| |
| /* |
| * Return a rough estimate of the maximum possible reply size. Note the |
| * estimate includes rpc headers so is meant to be passed to |
| * svc_reserve, not svc_reserve_auth. |
| * |
| * Also note the current compound encoding permits only one operation to |
| * use pages beyond the first one, so the maximum possible length is the |
| * maximum over these values, not the sum. |
| */ |
| static int nfsd4_max_reply(u32 opnum) |
| { |
| switch (opnum) { |
| case OP_READLINK: |
| case OP_READDIR: |
| /* |
| * Both of these ops take a single page for data and put |
| * the head and tail in another page: |
| */ |
| return 2 * PAGE_SIZE; |
| case OP_READ: |
| return INT_MAX; |
| default: |
| return PAGE_SIZE; |
| } |
| } |
| |
| static __be32 |
| nfsd4_decode_compound(struct nfsd4_compoundargs *argp) |
| { |
| DECODE_HEAD; |
| struct nfsd4_op *op; |
| bool cachethis = false; |
| int max_reply = PAGE_SIZE; |
| int i; |
| |
| READ_BUF(4); |
| READ32(argp->taglen); |
| READ_BUF(argp->taglen + 8); |
| SAVEMEM(argp->tag, argp->taglen); |
| READ32(argp->minorversion); |
| READ32(argp->opcnt); |
| |
| if (argp->taglen > NFSD4_MAX_TAGLEN) |
| goto xdr_error; |
| if (argp->opcnt > 100) |
| goto xdr_error; |
| |
| if (argp->opcnt > ARRAY_SIZE(argp->iops)) { |
| argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); |
| if (!argp->ops) { |
| argp->ops = argp->iops; |
| dprintk("nfsd: couldn't allocate room for COMPOUND\n"); |
| goto xdr_error; |
| } |
| } |
| |
| if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) |
| argp->opcnt = 0; |
| |
| for (i = 0; i < argp->opcnt; i++) { |
| op = &argp->ops[i]; |
| op->replay = NULL; |
| |
| READ_BUF(4); |
| READ32(op->opnum); |
| |
| 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; |
| } |
| |
| if (op->status) { |
| argp->opcnt = i+1; |
| break; |
| } |
| /* |
| * We'll try to cache the result in the DRC if any one |
| * op in the compound wants to be cached: |
| */ |
| cachethis |= nfsd4_cache_this_op(op); |
| |
| max_reply = max(max_reply, nfsd4_max_reply(op->opnum)); |
| } |
| /* Sessions make the DRC unnecessary: */ |
| if (argp->minorversion) |
| cachethis = false; |
| if (max_reply != INT_MAX) |
| svc_reserve(argp->rqstp, max_reply); |
| argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; |
| |
| DECODE_TAIL; |
| } |
| |
| #define WRITE32(n) *p++ = htonl(n) |
| #define WRITE64(n) do { \ |
| *p++ = htonl((u32)((n) >> 32)); \ |
| *p++ = htonl((u32)(n)); \ |
| } while (0) |
| #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ |
| *(p + XDR_QUADLEN(nbytes) -1) = 0; \ |
| memcpy(p, ptr, nbytes); \ |
| p += XDR_QUADLEN(nbytes); \ |
| }} while (0) |
| |
| static void write32(__be32 **p, u32 n) |
| { |
| *(*p)++ = htonl(n); |
| } |
| |
| static void write64(__be32 **p, u64 n) |
| { |
| write32(p, (n >> 32)); |
| write32(p, (u32)n); |
| } |
| |
| static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) |
| { |
| if (IS_I_VERSION(inode)) { |
| write64(p, inode->i_version); |
| } else { |
| write32(p, stat->ctime.tv_sec); |
| write32(p, stat->ctime.tv_nsec); |
| } |
| } |
| |
| static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) |
| { |
| write32(p, c->atomic); |
| if (c->change_supported) { |
| write64(p, c->before_change); |
| write64(p, c->after_change); |
| } else { |
| write32(p, c->before_ctime_sec); |
| write32(p, c->before_ctime_nsec); |
| write32(p, c->after_ctime_sec); |
| write32(p, c->after_ctime_nsec); |
| } |
| } |
| |
| #define RESERVE_SPACE(nbytes) do { \ |
| p = resp->p; \ |
| BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ |
| } while (0) |
| #define ADJUST_ARGS() resp->p = p |
| |
| /* 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(char sep, char *components, |
| __be32 **pp, int *buflen, |
| char esc_enter, char esc_exit) |
| { |
| __be32 *p = *pp; |
| __be32 *countp = p; |
| int strlen, count=0; |
| char *str, *end, *next; |
| |
| dprintk("nfsd4_encode_components(%s)\n", components); |
| if ((*buflen -= 4) < 0) |
| return nfserr_resource; |
| WRITE32(0); /* We will fill this in with @count later */ |
| end = str = components; |
| while (*end) { |
| 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) { |
| if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) |
| return nfserr_resource; |
| WRITE32(strlen); |
| WRITEMEM(str, strlen); |
| count++; |
| } |
| else |
| end++; |
| str = end; |
| } |
| *pp = p; |
| p = countp; |
| WRITE32(count); |
| return 0; |
| } |
| |
| /* Encode as an array of strings the string given with components |
| * separated @sep. |
| */ |
| static __be32 nfsd4_encode_components(char sep, char *components, |
| __be32 **pp, int *buflen) |
| { |
| return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0); |
| } |
| |
| /* |
| * encode a location element of a fs_locations structure |
| */ |
| static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, |
| __be32 **pp, int *buflen) |
| { |
| __be32 status; |
| __be32 *p = *pp; |
| |
| status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen, |
| '[', ']'); |
| if (status) |
| return status; |
| status = nfsd4_encode_components('/', location->path, &p, buflen); |
| if (status) |
| return status; |
| *pp = p; |
| return 0; |
| } |
| |
| /* |
| * Encode a path in RFC3530 'pathname4' format |
| */ |
| static __be32 nfsd4_encode_path(const struct path *root, |
| const struct path *path, __be32 **pp, int *buflen) |
| { |
| struct path cur = *path; |
| __be32 *p = *pp; |
| struct dentry **components = NULL; |
| unsigned int ncomponents = 0; |
| __be32 err = nfserr_jukebox; |
| |
| dprintk("nfsd4_encode_components("); |
| |
| path_get(&cur); |
| /* First walk the path up to the nfsd root, and store the |
| * dentries/path components in an array. |
| */ |
| for (;;) { |
| if (cur.dentry == root->dentry && cur.mnt == root->mnt) |
| break; |
| if (cur.dentry == cur.mnt->mnt_root) { |
| if (follow_up(&cur)) |
| continue; |
| goto out_free; |
| } |
| if ((ncomponents & 15) == 0) { |
| struct dentry **new; |
| new = krealloc(components, |
| sizeof(*new) * (ncomponents + 16), |
| GFP_KERNEL); |
| if (!new) |
| goto out_free; |
| components = new; |
| } |
| components[ncomponents++] = cur.dentry; |
| cur.dentry = dget_parent(cur.dentry); |
| } |
| |
| *buflen -= 4; |
| if (*buflen < 0) |
| goto out_free; |
| WRITE32(ncomponents); |
| |
| while (ncomponents) { |
| struct dentry *dentry = components[ncomponents - 1]; |
| unsigned int len; |
| |
| spin_lock(&dentry->d_lock); |
| len = dentry->d_name.len; |
| *buflen -= 4 + (XDR_QUADLEN(len) << 2); |
| if (*buflen < 0) { |
| spin_unlock(&dentry->d_lock); |
| goto out_free; |
| } |
| WRITE32(len); |
| WRITEMEM(dentry->d_name.name, len); |
| dprintk("/%s", dentry->d_name.name); |
| spin_unlock(&dentry->d_lock); |
| dput(dentry); |
| ncomponents--; |
| } |
| |
| *pp = p; |
| err = 0; |
| out_free: |
| dprintk(")\n"); |
| while (ncomponents) |
| dput(components[--ncomponents]); |
| kfree(components); |
| path_put(&cur); |
| return err; |
| } |
| |
| static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp, |
| const struct path *path, __be32 **pp, int *buflen) |
| { |
| struct svc_export *exp_ps; |
| __be32 res; |
| |
| exp_ps = rqst_find_fsidzero_export(rqstp); |
| if (IS_ERR(exp_ps)) |
| return nfserrno(PTR_ERR(exp_ps)); |
| res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen); |
| exp_put(exp_ps); |
| return res; |
| } |
| |
| /* |
| * encode a fs_locations structure |
| */ |
| static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, |
| struct svc_export *exp, |
| __be32 **pp, int *buflen) |
| { |
| __be32 status; |
| int i; |
| __be32 *p = *pp; |
| struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; |
| |
| status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen); |
| if (status) |
| return status; |
| if ((*buflen -= 4) < 0) |
| return nfserr_resource; |
| WRITE32(fslocs->locations_count); |
| for (i=0; i<fslocs->locations_count; i++) { |
| status = nfsd4_encode_fs_location4(&fslocs->locations[i], |
| &p, buflen); |
| if (status) |
| return status; |
| } |
| *pp = p; |
| return 0; |
| } |
| |
| static u32 nfs4_file_type(umode_t mode) |
| { |
| switch (mode & S_IFMT) { |
| case S_IFIFO: return NF4FIFO; |
| case S_IFCHR: return NF4CHR; |
| case S_IFDIR: return NF4DIR; |
| case S_IFBLK: return NF4BLK; |
| case S_IFLNK: return NF4LNK; |
| case S_IFREG: return NF4REG; |
| case S_IFSOCK: return NF4SOCK; |
| default: return NF4BAD; |
| }; |
| } |
| |
| static __be32 |
| nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid, |
| __be32 **p, int *buflen) |
| { |
| int status; |
| |
| if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) |
| return nfserr_resource; |
| if (whotype != NFS4_ACL_WHO_NAMED) |
| status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); |
| else if (gid_valid(gid)) |
| status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1)); |
| else |
| status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1)); |
| if (status < 0) |
| return nfserrno(status); |
| *p = xdr_encode_opaque(*p, NULL, status); |
| *buflen -= (XDR_QUADLEN(status) << 2) + 4; |
| BUG_ON(*buflen < 0); |
| return 0; |
| } |
| |
| static inline __be32 |
| nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen) |
| { |
| return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID, |
| p, buflen); |
| } |
| |
| static inline __be32 |
| nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen) |
| { |
| return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group, |
| p, buflen); |
| } |
| |
| static inline __be32 |
| nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace, |
| __be32 **p, int *buflen) |
| { |
| kuid_t uid = INVALID_UID; |
| kgid_t gid = INVALID_GID; |
| |
| if (ace->whotype == NFS4_ACL_WHO_NAMED) { |
| if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
| gid = ace->who_gid; |
| else |
| uid = ace->who_uid; |
| } |
| return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen); |
| } |
| |
| #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ |
| FATTR4_WORD0_RDATTR_ERROR) |
| #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID |
| |
| #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| static inline __be32 |
| nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen) |
| { |
| __be32 *p = *pp; |
| |
| if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4)) |
| 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. |
| */ |
| if ((*buflen -= 8) < 0) |
| return nfserr_resource; |
| |
| WRITE32(0); /* lfs */ |
| WRITE32(0); /* pi */ |
| p = xdr_encode_opaque(p, context, len); |
| *buflen -= (XDR_QUADLEN(len) << 2) + 4; |
| |
| *pp = p; |
| return 0; |
| } |
| #else |
| static inline __be32 |
| nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen) |
| { return 0; } |
| #endif |
| |
| static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) |
| { |
| /* As per referral draft: */ |
| if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || |
| *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { |
| if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || |
| *bmval0 & FATTR4_WORD0_FS_LOCATIONS) |
| *rdattr_err = NFSERR_MOVED; |
| else |
| return nfserr_moved; |
| } |
| *bmval0 &= WORD0_ABSENT_FS_ATTRS; |
| *bmval1 &= WORD1_ABSENT_FS_ATTRS; |
| return 0; |
| } |
| |
| |
| 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); |
| path_put(&path); |
| return err; |
| } |
| |
| /* |
| * Note: @fhp can be NULL; in this case, we might have to compose the filehandle |
| * ourselves. |
| * |
| * countp is the buffer size in _words_ |
| */ |
| __be32 |
| nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, |
| struct dentry *dentry, __be32 **buffer, int count, u32 *bmval, |
| struct svc_rqst *rqstp, int ignore_crossmnt) |
| { |
| u32 bmval0 = bmval[0]; |
| u32 bmval1 = bmval[1]; |
| u32 bmval2 = bmval[2]; |
| struct kstat stat; |
| struct svc_fh tempfh; |
| struct kstatfs statfs; |
| int buflen = count << 2; |
| __be32 *attrlenp; |
| u32 dummy; |
| u64 dummy64; |
| u32 rdattr_err = 0; |
| __be32 *p = *buffer; |
| __be32 status; |
| int err; |
| int aclsupport = 0; |
| struct nfs4_acl *acl = NULL; |
| 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(bmval0 & ~nfsd_suppattrs0(minorversion)); |
| BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); |
| BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); |
| |
| if (exp->ex_fslocs.migrated) { |
| BUG_ON(bmval[2]); |
| status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); |
| if (status) |
| goto out; |
| } |
| |
| err = vfs_getattr(&path, &stat); |
| if (err) |
| goto out_nfserr; |
| if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | |
| FATTR4_WORD0_MAXNAME)) || |
| (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | |
| FATTR4_WORD1_SPACE_TOTAL))) { |
| err = vfs_statfs(&path, &statfs); |
| if (err) |
| goto out_nfserr; |
| } |
| if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { |
| fh_init(&tempfh, NFS4_FHSIZE); |
| status = fh_compose(&tempfh, exp, dentry, NULL); |
| if (status) |
| goto out; |
| fhp = &tempfh; |
| } |
| if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT |
| | FATTR4_WORD0_SUPPORTED_ATTRS)) { |
| err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); |
| aclsupport = (err == 0); |
| if (bmval0 & FATTR4_WORD0_ACL) { |
| if (err == -EOPNOTSUPP) |
| bmval0 &= ~FATTR4_WORD0_ACL; |
| else if (err == -EINVAL) { |
| status = nfserr_attrnotsupp; |
| goto out; |
| } else if (err != 0) |
| goto out_nfserr; |
| } |
| } |
| |
| #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) || |
| bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) { |
| err = security_inode_getsecctx(dentry->d_inode, |
| &context, &contextlen); |
| 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 */ |
| |
| if (bmval2) { |
| if ((buflen -= 16) < 0) |
| goto out_resource; |
| WRITE32(3); |
| WRITE32(bmval0); |
| WRITE32(bmval1); |
| WRITE32(bmval2); |
| } else if (bmval1) { |
| if ((buflen -= 12) < 0) |
| goto out_resource; |
| WRITE32(2); |
| WRITE32(bmval0); |
| WRITE32(bmval1); |
| } else { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE32(1); |
| WRITE32(bmval0); |
| } |
| attrlenp = p++; /* to be backfilled later */ |
| |
| if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { |
| u32 word0 = nfsd_suppattrs0(minorversion); |
| u32 word1 = nfsd_suppattrs1(minorversion); |
| u32 word2 = nfsd_suppattrs2(minorversion); |
| |
| if (!aclsupport) |
| word0 &= ~FATTR4_WORD0_ACL; |
| if (!contextsupport) |
| word2 &= ~FATTR4_WORD2_SECURITY_LABEL; |
| if (!word2) { |
| if ((buflen -= 12) < 0) |
| goto out_resource; |
| WRITE32(2); |
| WRITE32(word0); |
| WRITE32(word1); |
| } else { |
| if ((buflen -= 16) < 0) |
| goto out_resource; |
| WRITE32(3); |
| WRITE32(word0); |
| WRITE32(word1); |
| WRITE32(word2); |
| } |
| } |
| if (bmval0 & FATTR4_WORD0_TYPE) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| dummy = nfs4_file_type(stat.mode); |
| if (dummy == NF4BAD) |
| goto out_serverfault; |
| WRITE32(dummy); |
| } |
| if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) |
| WRITE32(NFS4_FH_PERSISTENT); |
| else |
| WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); |
| } |
| if (bmval0 & FATTR4_WORD0_CHANGE) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| write_change(&p, &stat, dentry->d_inode); |
| } |
| if (bmval0 & FATTR4_WORD0_SIZE) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE64(stat.size); |
| } |
| if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(0); |
| } |
| if (bmval0 & FATTR4_WORD0_FSID) { |
| if ((buflen -= 16) < 0) |
| goto out_resource; |
| if (exp->ex_fslocs.migrated) { |
| WRITE64(NFS4_REFERRAL_FSID_MAJOR); |
| WRITE64(NFS4_REFERRAL_FSID_MINOR); |
| } else switch(fsid_source(fhp)) { |
| case FSIDSOURCE_FSID: |
| WRITE64((u64)exp->ex_fsid); |
| WRITE64((u64)0); |
| break; |
| case FSIDSOURCE_DEV: |
| WRITE32(0); |
| WRITE32(MAJOR(stat.dev)); |
| WRITE32(0); |
| WRITE32(MINOR(stat.dev)); |
| break; |
| case FSIDSOURCE_UUID: |
| WRITEMEM(exp->ex_uuid, 16); |
| break; |
| } |
| } |
| if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(0); |
| } |
| if (bmval0 & FATTR4_WORD0_LEASE_TIME) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(nn->nfsd4_lease); |
| } |
| if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(rdattr_err); |
| } |
| if (bmval0 & FATTR4_WORD0_ACL) { |
| struct nfs4_ace *ace; |
| |
| if (acl == NULL) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| |
| WRITE32(0); |
| goto out_acl; |
| } |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(acl->naces); |
| |
| for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { |
| if ((buflen -= 4*3) < 0) |
| goto out_resource; |
| WRITE32(ace->type); |
| WRITE32(ace->flag); |
| WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); |
| status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen); |
| if (status == nfserr_resource) |
| goto out_resource; |
| if (status) |
| goto out; |
| } |
| } |
| out_acl: |
| if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(aclsupport ? |
| ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); |
| } |
| if (bmval0 & FATTR4_WORD0_CANSETTIME) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(0); |
| } |
| if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_FILEHANDLE) { |
| buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; |
| if (buflen < 0) |
| goto out_resource; |
| WRITE32(fhp->fh_handle.fh_size); |
| WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); |
| } |
| if (bmval0 & FATTR4_WORD0_FILEID) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE64(stat.ino); |
| } |
| if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE64((u64) statfs.f_ffree); |
| } |
| if (bmval0 & FATTR4_WORD0_FILES_FREE) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE64((u64) statfs.f_ffree); |
| } |
| if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE64((u64) statfs.f_files); |
| } |
| if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { |
| status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); |
| if (status == nfserr_resource) |
| goto out_resource; |
| if (status) |
| goto out; |
| } |
| if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(1); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXLINK) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(255); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXNAME) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(statfs.f_namelen); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXREAD) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE64((u64) svc_max_payload(rqstp)); |
| } |
| if (bmval0 & FATTR4_WORD0_MAXWRITE) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE64((u64) svc_max_payload(rqstp)); |
| } |
| if (bmval1 & FATTR4_WORD1_MODE) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(stat.mode & S_IALLUGO); |
| } |
| if (bmval1 & FATTR4_WORD1_NO_TRUNC) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(1); |
| } |
| if (bmval1 & FATTR4_WORD1_NUMLINKS) { |
| if ((buflen -= 4) < 0) |
| goto out_resource; |
| WRITE32(stat.nlink); |
| } |
| if (bmval1 & FATTR4_WORD1_OWNER) { |
| status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); |
| if (status == nfserr_resource) |
| goto out_resource; |
| if (status) |
| goto out; |
| } |
| if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { |
| status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); |
| if (status == nfserr_resource) |
| goto out_resource; |
| if (status) |
| goto out; |
| } |
| if (bmval1 & FATTR4_WORD1_RAWDEV) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| WRITE32((u32) MAJOR(stat.rdev)); |
| WRITE32((u32) MINOR(stat.rdev)); |
| } |
| if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; |
| WRITE64(dummy64); |
| } |
| if (bmval1 & FATTR4_WORD1_SPACE_FREE) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; |
| WRITE64(dummy64); |
| } |
| if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; |
| WRITE64(dummy64); |
| } |
| if (bmval1 & FATTR4_WORD1_SPACE_USED) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| dummy64 = (u64)stat.blocks << 9; |
| WRITE64(dummy64); |
| } |
| if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { |
| if ((buflen -= 12) < 0) |
| goto out_resource; |
| WRITE64((s64)stat.atime.tv_sec); |
| WRITE32(stat.atime.tv_nsec); |
| } |
| if (bmval1 & FATTR4_WORD1_TIME_DELTA) { |
| if ((buflen -= 12) < 0) |
| goto out_resource; |
| WRITE32(0); |
| WRITE32(1); |
| WRITE32(0); |
| } |
| if (bmval1 & FATTR4_WORD1_TIME_METADATA) { |
| if ((buflen -= 12) < 0) |
| goto out_resource; |
| WRITE64((s64)stat.ctime.tv_sec); |
| WRITE32(stat.ctime.tv_nsec); |
| } |
| if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { |
| if ((buflen -= 12) < 0) |
| goto out_resource; |
| WRITE64((s64)stat.mtime.tv_sec); |
| WRITE32(stat.mtime.tv_nsec); |
| } |
| if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { |
| if ((buflen -= 8) < 0) |
| goto out_resource; |
| /* |
| * Get parent's attributes if not ignoring crossmount |
| * and this is the root of a cross-mounted filesystem. |
| */ |
| if (ignore_crossmnt == 0 && |
| dentry == exp->ex_path.mnt->mnt_root) |
| get_parent_attributes(exp, &stat); |
| WRITE64(stat.ino); |
| } |
| if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
| status = nfsd4_encode_security_label(rqstp, context, |
| contextlen, &p, &buflen); |
| if (status) |
| goto out; |
| } |
| if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { |
| WRITE32(3); |
| WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); |
| WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); |
| WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); |
| } |
| |
| *attrlenp = htonl((char *)p - (char *)attrlenp - 4); |
| *buffer = p; |
| 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 (fhp == &tempfh) |
| fh_put(&tempfh); |
| return status; |
| out_nfserr: |
| status = nfserrno(err); |
| goto out; |
| out_resource: |
| status = nfserr_resource; |
| goto out; |
| out_serverfault: |
| status = nfserr_serverfault; |
| goto out; |
| } |
| |
| static inline int attributes_need_mount(u32 *bmval) |
| { |
| if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) |
| return 1; |
| if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) |
| return 1; |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, |
| const char *name, int namlen, __be32 **p, int buflen) |
| { |
| struct svc_export *exp = cd->rd_fhp->fh_export; |
| struct dentry *dentry; |
| __be32 nfserr; |
| int ignore_crossmnt = 0; |
| |
| dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); |
| if (IS_ERR(dentry)) |
| return nfserrno(PTR_ERR(dentry)); |
| if (!dentry->d_inode) { |
| /* |
| * nfsd_buffered_readdir drops the i_mutex between |
| * readdir and calling this callback, leaving a window |
| * where this directory entry could have gone away. |
| */ |
| dput(dentry); |
| return nfserr_noent; |
| } |
| |
| exp_get(exp); |
| /* |
| * In the case of a mountpoint, the client may be asking for |
| * attributes that are only properties of the underlying filesystem |
| * as opposed to the cross-mounted file system. In such a case, |
| * we will not follow the cross mount and will fill the attribtutes |
| * directly from the mountpoint dentry. |
| */ |
| if (nfsd_mountpoint(dentry, exp)) { |
| int err; |
| |
| if (!(exp->ex_flags & NFSEXP_V4ROOT) |
| && !attributes_need_mount(cd->rd_bmval)) { |
| ignore_crossmnt = 1; |
| goto out_encode; |
| } |
| /* |
| * Why the heck aren't we just using nfsd_lookup?? |
| * Different "."/".." handling? Something else? |
| * At least, add a comment here to explain.... |
| */ |
| err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); |
| if (err) { |
| nfserr = nfserrno(err); |
| goto out_put; |
| } |
| nfserr = check_nfsd_access(exp, cd->rd_rqstp); |
| if (nfserr) |
| goto out_put; |
| |
| } |
| out_encode: |
| nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, |
| cd->rd_rqstp, ignore_crossmnt); |
| out_put: |
| dput(dentry); |
| exp_put(exp); |
| return nfserr; |
| } |
| |
| static __be32 * |
| nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) |
| { |
| __be32 *attrlenp; |
| |
| if (buflen < 6) |
| return NULL; |
| *p++ = htonl(2); |
| *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ |
| *p++ = htonl(0); /* bmval1 */ |
| |
| attrlenp = p++; |
| *p++ = nfserr; /* no htonl */ |
| *attrlenp = htonl((char *)p - (char *)attrlenp - 4); |
| return p; |
| } |
| |
| static int |
| nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, |
| loff_t offset, u64 ino, unsigned int d_type) |
| { |
| struct readdir_cd *ccd = ccdv; |
| struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); |
| int buflen; |
| __be32 *p = cd->buffer; |
| __be32 *cookiep; |
| __be32 nfserr = nfserr_toosmall; |
| |
| /* In nfsv4, "." and ".." never make it onto the wire.. */ |
| if (name && isdotent(name, namlen)) { |
| cd->common.err = nfs_ok; |
| return 0; |
| } |
| |
| if (cd->offset) |
| xdr_encode_hyper(cd->offset, (u64) offset); |
| |
| buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); |
| if (buflen < 0) |
| goto fail; |
| |
| *p++ = xdr_one; /* mark entry present */ |
| cookiep = p; |
| p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ |
| p = xdr_encode_array(p, name, namlen); /* name length & name */ |
| |
| nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen); |
| switch (nfserr) { |
| case nfs_ok: |
| break; |
| case nfserr_resource: |
| nfserr = nfserr_toosmall; |
| goto fail; |
| case nfserr_noent: |
| goto skip_entry; |
| default: |
| /* |
| * If the client requested the RDATTR_ERROR attribute, |
| * we stuff the error code into this attribute |
| * and continue. If this attribute was not requested, |
| * then in accordance with the spec, we fail the |
| * entire READDIR operation(!) |
| */ |
| if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) |
| goto fail; |
| p = nfsd4_encode_rdattr_error(p, buflen, nfserr); |
| if (p == NULL) { |
| nfserr = nfserr_toosmall; |
| goto fail; |
| } |
| } |
| cd->buflen -= (p - cd->buffer); |
| cd->buffer = p; |
| cd->offset = cookiep; |
| skip_entry: |
| cd->common.err = nfs_ok; |
| return 0; |
| fail: |
| cd->common.err = nfserr; |
| return -EINVAL; |
| } |
| |
| static void |
| nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) |
| { |
| __be32 *p; |
| |
| RESERVE_SPACE(sizeof(stateid_t)); |
| WRITE32(sid->si_generation); |
| WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); |
| ADJUST_ARGS(); |
| } |
| |
| static __be32 |
| nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(8); |
| WRITE32(access->ac_supported); |
| WRITE32(access->ac_resp_access); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8); |
| WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
| WRITE32(bcts->dir); |
| /* Sorry, we do not yet support RDMA over 4.1: */ |
| WRITE32(0); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) |
| { |
| if (!nfserr) |
| nfsd4_encode_stateid(resp, &close->cl_stateid); |
| |
| return nfserr; |
| } |
| |
| |
| static __be32 |
| nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(NFS4_VERIFIER_SIZE); |
| WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(32); |
| write_cinfo(&p, &create->cr_cinfo); |
| WRITE32(2); |
| WRITE32(create->cr_bmval[0]); |
| WRITE32(create->cr_bmval[1]); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) |
| { |
| struct svc_fh *fhp = getattr->ga_fhp; |
| int buflen; |
| |
| if (nfserr) |
| return nfserr; |
| |
| buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); |
| nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, |
| &resp->p, buflen, getattr->ga_bmval, |
| resp->rqstp, 0); |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) |
| { |
| struct svc_fh *fhp = *fhpp; |
| unsigned int len; |
| __be32 *p; |
| |
| if (!nfserr) { |
| len = fhp->fh_handle.fh_size; |
| RESERVE_SPACE(len + 4); |
| WRITE32(len); |
| WRITEMEM(&fhp->fh_handle.fh_base, len); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| /* |
| * Including all fields other than the name, a LOCK4denied structure requires |
| * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. |
| */ |
| static void |
| nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) |
| { |
| struct xdr_netobj *conf = &ld->ld_owner; |
| __be32 *p; |
| |
| RESERVE_SPACE(32 + XDR_LEN(conf->len)); |
| WRITE64(ld->ld_start); |
| WRITE64(ld->ld_length); |
| WRITE32(ld->ld_type); |
| if (conf->len) { |
| WRITEMEM(&ld->ld_clientid, 8); |
| WRITE32(conf->len); |
| WRITEMEM(conf->data, conf->len); |
| kfree(conf->data); |
| } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ |
| WRITE64((u64)0); /* clientid */ |
| WRITE32(0); /* length of owner name */ |
| } |
| ADJUST_ARGS(); |
| } |
| |
| static __be32 |
| nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) |
| { |
| if (!nfserr) |
| nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); |
| else if (nfserr == nfserr_denied) |
| nfsd4_encode_lock_denied(resp, &lock->lk_denied); |
| |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) |
| { |
| if (nfserr == nfserr_denied) |
| nfsd4_encode_lock_denied(resp, &lockt->lt_denied); |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) |
| { |
| if (!nfserr) |
| nfsd4_encode_stateid(resp, &locku->lu_stateid); |
| |
| return nfserr; |
| } |
| |
| |
| static __be32 |
| nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(20); |
| write_cinfo(&p, &link->li_cinfo); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| |
| static __be32 |
| nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) |
| { |
| __be32 *p; |
| |
| if (nfserr) |
| goto out; |
| |
| nfsd4_encode_stateid(resp, &open->op_stateid); |
| RESERVE_SPACE(40); |
| write_cinfo(&p, &open->op_cinfo); |
| WRITE32(open->op_rflags); |
| WRITE32(2); |
| WRITE32(open->op_bmval[0]); |
| WRITE32(open->op_bmval[1]); |
| WRITE32(open->op_delegate_type); |
| ADJUST_ARGS(); |
| |
| switch (open->op_delegate_type) { |
| case NFS4_OPEN_DELEGATE_NONE: |
| break; |
| case NFS4_OPEN_DELEGATE_READ: |
| nfsd4_encode_stateid(resp, &open->op_delegate_stateid); |
| RESERVE_SPACE(20); |
| WRITE32(open->op_recall); |
| |
| /* |
| * TODO: ACE's in delegations |
| */ |
| WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
| WRITE32(0); |
| WRITE32(0); |
| WRITE32(0); /* XXX: is NULL principal ok? */ |
| ADJUST_ARGS(); |
| break; |
| case NFS4_OPEN_DELEGATE_WRITE: |
| nfsd4_encode_stateid(resp, &open->op_delegate_stateid); |
| RESERVE_SPACE(32); |
| WRITE32(0); |
| |
| /* |
| * TODO: space_limit's in delegations |
| */ |
| WRITE32(NFS4_LIMIT_SIZE); |
| WRITE32(~(u32)0); |
| WRITE32(~(u32)0); |
| |
| /* |
| * TODO: ACE's in delegations |
| */ |
| WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
| WRITE32(0); |
| WRITE32(0); |
| WRITE32(0); /* XXX: is NULL principal ok? */ |
| ADJUST_ARGS(); |
| break; |
| case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ |
| switch (open->op_why_no_deleg) { |
| case WND4_CONTENTION: |
| case WND4_RESOURCE: |
| RESERVE_SPACE(8); |
| WRITE32(open->op_why_no_deleg); |
| WRITE32(0); /* deleg signaling not supported yet */ |
| break; |
| default: |
| RESERVE_SPACE(4); |
| WRITE32(open->op_why_no_deleg); |
| } |
| ADJUST_ARGS(); |
| break; |
| default: |
| BUG(); |
| } |
| /* XXX save filehandle here */ |
| out: |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) |
| { |
| if (!nfserr) |
| nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); |
| |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) |
| { |
| if (!nfserr) |
| nfsd4_encode_stateid(resp, &od->od_stateid); |
| |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_read *read) |
| { |
| u32 eof; |
| int v; |
| struct page *page; |
| unsigned long maxcount; |
| long len; |
| __be32 *p; |
| |
| if (nfserr) |
| return nfserr; |
| if (resp->xbuf->page_len) |
| return nfserr_resource; |
| |
| RESERVE_SPACE(8); /* eof flag and byte count */ |
| |
| maxcount = svc_max_payload(resp->rqstp); |
| if (maxcount > read->rd_length) |
| maxcount = read->rd_length; |
| |
| len = maxcount; |
| v = 0; |
| while (len > 0) { |
| page = *(resp->rqstp->rq_next_page); |
| if (!page) { /* ran out of pages */ |
| maxcount -= len; |
| break; |
| } |
| resp->rqstp->rq_vec[v].iov_base = page_address(page); |
| resp->rqstp->rq_vec[v].iov_len = |
| len < PAGE_SIZE ? len : PAGE_SIZE; |
| resp->rqstp->rq_next_page++; |
| v++; |
| len -= PAGE_SIZE; |
| } |
| read->rd_vlen = v; |
| |
| nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp, |
| read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, |
| &maxcount); |
| |
| if (nfserr) |
| return nfserr; |
| eof = (read->rd_offset + maxcount >= |
| read->rd_fhp->fh_dentry->d_inode->i_size); |
| |
| WRITE32(eof); |
| WRITE32(maxcount); |
| ADJUST_ARGS(); |
| resp->xbuf->head[0].iov_len = (char*)p |
| - (char*)resp->xbuf->head[0].iov_base; |
| resp->xbuf->page_len = maxcount; |
| |
| /* Use rest of head for padding and remaining ops: */ |
| resp->xbuf->tail[0].iov_base = p; |
| resp->xbuf->tail[0].iov_len = 0; |
| if (maxcount&3) { |
| RESERVE_SPACE(4); |
| WRITE32(0); |
| resp->xbuf->tail[0].iov_base += maxcount&3; |
| resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); |
| ADJUST_ARGS(); |
| } |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) |
| { |
| int maxcount; |
| char *page; |
| __be32 *p; |
| |
| if (nfserr) |
| return nfserr; |
| if (resp->xbuf->page_len) |
| return nfserr_resource; |
| if (!*resp->rqstp->rq_next_page) |
| return nfserr_resource; |
| |
| page = page_address(*(resp->rqstp->rq_next_page++)); |
| |
| maxcount = PAGE_SIZE; |
| RESERVE_SPACE(4); |
| |
| /* |
| * XXX: By default, the ->readlink() VFS op will truncate symlinks |
| * if they would overflow the buffer. Is this kosher in NFSv4? If |
| * not, one easy fix is: if ->readlink() precisely fills the buffer, |
| * assume that truncation occurred, and return NFS4ERR_RESOURCE. |
| */ |
| nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); |
| if (nfserr == nfserr_isdir) |
| return nfserr_inval; |
| if (nfserr) |
| return nfserr; |
| |
| WRITE32(maxcount); |
| ADJUST_ARGS(); |
| resp->xbuf->head[0].iov_len = (char*)p |
| - (char*)resp->xbuf->head[0].iov_base; |
| resp->xbuf->page_len = maxcount; |
| |
| /* Use rest of head for padding and remaining ops: */ |
| resp->xbuf->tail[0].iov_base = p; |
| resp->xbuf->tail[0].iov_len = 0; |
| if (maxcount&3) { |
| RESERVE_SPACE(4); |
| WRITE32(0); |
| resp->xbuf->tail[0].iov_base += maxcount&3; |
| resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); |
| ADJUST_ARGS(); |
| } |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) |
| { |
| int maxcount; |
| loff_t offset; |
| __be32 *page, *savep, *tailbase; |
| __be32 *p; |
| |
| if (nfserr) |
| return nfserr; |
| if (resp->xbuf->page_len) |
| return nfserr_resource; |
| if (!*resp->rqstp->rq_next_page) |
| return nfserr_resource; |
| |
| RESERVE_SPACE(NFS4_VERIFIER_SIZE); |
| savep = p; |
| |
| /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ |
| WRITE32(0); |
| WRITE32(0); |
| ADJUST_ARGS(); |
| resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; |
| tailbase = p; |
| |
| maxcount = PAGE_SIZE; |
| if (maxcount > readdir->rd_maxcount) |
| maxcount = readdir->rd_maxcount; |
| |
| /* |
| * Convert from bytes to words, account for the two words already |
| * written, make sure to leave two words at the end for the next |
| * pointer and eof field. |
| */ |
| maxcount = (maxcount >> 2) - 4; |
| if (maxcount < 0) { |
| nfserr = nfserr_toosmall; |
| goto err_no_verf; |
| } |
| |
| page = page_address(*(resp->rqstp->rq_next_page++)); |
| readdir->common.err = 0; |
| readdir->buflen = maxcount; |
| readdir->buffer = page; |
| readdir->offset = NULL; |
| |
| offset = readdir->rd_cookie; |
| nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, |
| &offset, |
| &readdir->common, nfsd4_encode_dirent); |
| if (nfserr == nfs_ok && |
| readdir->common.err == nfserr_toosmall && |
| readdir->buffer == page) |
| nfserr = nfserr_toosmall; |
| if (nfserr) |
| goto err_no_verf; |
| |
| if (readdir->offset) |
| xdr_encode_hyper(readdir->offset, offset); |
| |
| p = readdir->buffer; |
| *p++ = 0; /* no more entries */ |
| *p++ = htonl(readdir->common.err == nfserr_eof); |
| resp->xbuf->page_len = ((char*)p) - |
| (char*)page_address(*(resp->rqstp->rq_next_page-1)); |
| |
| /* Use rest of head for padding and remaining ops: */ |
| resp->xbuf->tail[0].iov_base = tailbase; |
| resp->xbuf->tail[0].iov_len = 0; |
| resp->p = resp->xbuf->tail[0].iov_base; |
| resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; |
| |
| return 0; |
| err_no_verf: |
| p = savep; |
| ADJUST_ARGS(); |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(20); |
| write_cinfo(&p, &remove->rm_cinfo); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(40); |
| write_cinfo(&p, &rename->rn_sinfo); |
| write_cinfo(&p, &rename->rn_tinfo); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, |
| __be32 nfserr, struct svc_export *exp) |
| { |
| u32 i, nflavs, supported; |
| struct exp_flavor_info *flavs; |
| struct exp_flavor_info def_flavs[2]; |
| __be32 *p, *flavorsp; |
| static bool report = true; |
| |
| if (nfserr) |
| goto out; |
| if (exp->ex_nflavors) { |
| flavs = exp->ex_flavors; |
| nflavs = exp->ex_nflavors; |
| } else { /* Handling of some defaults in absence of real secinfo: */ |
| flavs = def_flavs; |
| if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { |
| nflavs = 2; |
| flavs[0].pseudoflavor = RPC_AUTH_UNIX; |
| flavs[1].pseudoflavor = RPC_AUTH_NULL; |
| } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { |
| nflavs = 1; |
| flavs[0].pseudoflavor |
| = svcauth_gss_flavor(exp->ex_client); |
| } else { |
| nflavs = 1; |
| flavs[0].pseudoflavor |
| = exp->ex_client->flavour->flavour; |
| } |
| } |
| |
| supported = 0; |
| RESERVE_SPACE(4); |
| flavorsp = p++; /* to be backfilled later */ |
| ADJUST_ARGS(); |
| |
| 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++; |
| RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4); |
| WRITE32(RPC_AUTH_GSS); |
| WRITE32(info.oid.len); |
| WRITEMEM(info.oid.data, info.oid.len); |
| WRITE32(info.qop); |
| WRITE32(info.service); |
| ADJUST_ARGS(); |
| } else if (pf < RPC_AUTH_MAXFLAVOR) { |
| supported++; |
| RESERVE_SPACE(4); |
| WRITE32(pf); |
| ADJUST_ARGS(); |
| } else { |
| if (report) |
| pr_warn("NFS: SECINFO: security flavor %u " |
| "is not supported\n", pf); |
| } |
| } |
| |
| if (nflavs != supported) |
| report = false; |
| *flavorsp = htonl(supported); |
| |
| out: |
| if (exp) |
| exp_put(exp); |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_secinfo *secinfo) |
| { |
| return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp); |
| } |
| |
| static __be32 |
| nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_secinfo_no_name *secinfo) |
| { |
| return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp); |
| } |
| |
| /* |
| * The SETATTR encode routine is special -- it always encodes a bitmap, |
| * regardless of the error status. |
| */ |
| static __be32 |
| nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) |
| { |
| __be32 *p; |
| |
| RESERVE_SPACE(16); |
| if (nfserr) { |
| WRITE32(3); |
| WRITE32(0); |
| WRITE32(0); |
| WRITE32(0); |
| } |
| else { |
| WRITE32(3); |
| WRITE32(setattr->sa_bmval[0]); |
| WRITE32(setattr->sa_bmval[1]); |
| WRITE32(setattr->sa_bmval[2]); |
| } |
| ADJUST_ARGS(); |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE); |
| WRITEMEM(&scd->se_clientid, 8); |
| WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE); |
| ADJUST_ARGS(); |
| } |
| else if (nfserr == nfserr_clid_inuse) { |
| RESERVE_SPACE(8); |
| WRITE32(0); |
| WRITE32(0); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) |
| { |
| __be32 *p; |
| |
| if (!nfserr) { |
| RESERVE_SPACE(16); |
| WRITE32(write->wr_bytes_written); |
| WRITE32(write->wr_how_written); |
| WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE); |
| ADJUST_ARGS(); |
| } |
| return nfserr; |
| } |
| |
| static const u32 nfs4_minimal_spo_must_enforce[2] = { |
| [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | |
| 1 << (OP_EXCHANGE_ID - 32) | |
| 1 << (OP_CREATE_SESSION - 32) | |
| 1 << (OP_DESTROY_SESSION - 32) | |
| 1 << (OP_DESTROY_CLIENTID - 32) |
| }; |
| |
| static __be32 |
| nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_exchange_id *exid) |
| { |
| __be32 *p; |
| char *major_id; |
| char *server_scope; |
| int major_id_sz; |
| int server_scope_sz; |
| uint64_t minor_id = 0; |
| |
| if (nfserr) |
| return nfserr; |
| |
| major_id = utsname()->nodename; |
| major_id_sz = strlen(major_id); |
| server_scope = utsname()->nodename; |
| server_scope_sz = strlen(server_scope); |
| |
| RESERVE_SPACE( |
| 8 /* eir_clientid */ + |
| 4 /* eir_sequenceid */ + |
| 4 /* eir_flags */ + |
| 4 /* spr_how */); |
| |
| WRITEMEM(&exid->clientid, 8); |
| WRITE32(exid->seqid); |
| WRITE32(exid->flags); |
| |
| WRITE32(exid->spa_how); |
| ADJUST_ARGS(); |
| |
| switch (exid->spa_how) { |
| case SP4_NONE: |
| break; |
| case SP4_MACH_CRED: |
| /* spo_must_enforce, spo_must_allow */ |
| RESERVE_SPACE(16); |
| |
| /* spo_must_enforce bitmap: */ |
| WRITE32(2); |
| WRITE32(nfs4_minimal_spo_must_enforce[0]); |
| WRITE32(nfs4_minimal_spo_must_enforce[1]); |
| /* empty spo_must_allow bitmap: */ |
| WRITE32(0); |
| |
| ADJUST_ARGS(); |
| break; |
| default: |
| WARN_ON_ONCE(1); |
| } |
| |
| RESERVE_SPACE( |
| 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) */); |
| |
| /* The server_owner struct */ |
| WRITE64(minor_id); /* Minor id */ |
| /* major id */ |
| WRITE32(major_id_sz); |
| WRITEMEM(major_id, major_id_sz); |
| |
| /* Server scope */ |
| WRITE32(server_scope_sz); |
| WRITEMEM(server_scope, server_scope_sz); |
| |
| /* Implementation id */ |
| WRITE32(0); /* zero length nfs_impl_id4 array */ |
| ADJUST_ARGS(); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_create_session *sess) |
| { |
| __be32 *p; |
| |
| if (nfserr) |
| return nfserr; |
| |
| RESERVE_SPACE(24); |
| WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
| WRITE32(sess->seqid); |
| WRITE32(sess->flags); |
| ADJUST_ARGS(); |
| |
| RESERVE_SPACE(28); |
| WRITE32(0); /* headerpadsz */ |
| WRITE32(sess->fore_channel.maxreq_sz); |
| WRITE32(sess->fore_channel.maxresp_sz); |
| WRITE32(sess->fore_channel.maxresp_cached); |
| WRITE32(sess->fore_channel.maxops); |
| WRITE32(sess->fore_channel.maxreqs); |
| WRITE32(sess->fore_channel.nr_rdma_attrs); |
| ADJUST_ARGS(); |
| |
| if (sess->fore_channel.nr_rdma_attrs) { |
| RESERVE_SPACE(4); |
| WRITE32(sess->fore_channel.rdma_attrs); |
| ADJUST_ARGS(); |
| } |
| |
| RESERVE_SPACE(28); |
| WRITE32(0); /* headerpadsz */ |
| WRITE32(sess->back_channel.maxreq_sz); |
| WRITE32(sess->back_channel.maxresp_sz); |
| WRITE32(sess->back_channel.maxresp_cached); |
| WRITE32(sess->back_channel.maxops); |
| WRITE32(sess->back_channel.maxreqs); |
| WRITE32(sess->back_channel.nr_rdma_attrs); |
| ADJUST_ARGS(); |
| |
| if (sess->back_channel.nr_rdma_attrs) { |
| RESERVE_SPACE(4); |
| WRITE32(sess->back_channel.rdma_attrs); |
| ADJUST_ARGS(); |
| } |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_sequence *seq) |
| { |
| __be32 *p; |
| |
| if (nfserr) |
| return nfserr; |
| |
| RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); |
| WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
| WRITE32(seq->seqid); |
| WRITE32(seq->slotid); |
| /* Note slotid's are numbered from zero: */ |
| WRITE32(seq->maxslots - 1); /* sr_highest_slotid */ |
| WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */ |
| WRITE32(seq->status_flags); |
| |
| ADJUST_ARGS(); |
| resp->cstate.datap = p; /* DRC cache data pointer */ |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, |
| struct nfsd4_test_stateid *test_stateid) |
| { |
| struct nfsd4_test_stateid_id *stateid, *next; |
| __be32 *p; |
| |
| RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids)); |
| *p++ = htonl(test_stateid->ts_num_ids); |
| |
| list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { |
| *p++ = stateid->ts_id_status; |
| } |
| |
| ADJUST_ARGS(); |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) |
| { |
| return nfserr; |
| } |
| |
| typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); |
| |
| /* |
| * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 |
| * since we don't need to filter out obsolete ops as this is |
| * done in the decoding phase. |
| */ |
| static nfsd4_enc nfsd4_enc_ops[] = { |
| [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, |
| [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, |
| [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, |
| [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, |
| [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, |
| [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, |
| [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, |
| [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, |
| [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, |
| [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, |
| [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, |
| [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, |
| [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, |
| [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_READ] = (nfsd4_enc)nfsd4_encode_read, |
| [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, |
| [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, |
| [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, |
| [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, |
| [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, |
| [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, |
| [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, |
| [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, |
| [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, |
| |
| /* NFSv4.1 operations */ |
| [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, |
| [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, |
| [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, |
| [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, |
| [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, |
| [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, |
| [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, |
| [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, |
| }; |
| |
| /* |
| * Calculate the total amount of memory that the compound response has taken |
| * after encoding the current operation with pad. |
| * |
| * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop() |
| * which was specified at nfsd4_operation, else pad is zero. |
| * |
| * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached. |
| * |
| * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so |
| * will be at least a page and will therefore hold the xdr_buf head. |
| */ |
| __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad) |
| { |
| struct xdr_buf *xb = &resp->rqstp->rq_res; |
| struct nfsd4_session *session = NULL; |
| struct nfsd4_slot *slot = resp->cstate.slot; |
| u32 length, tlen = 0; |
| |
| if (!nfsd4_has_session(&resp->cstate)) |
| return 0; |
| |
| session = resp->cstate.session; |
| if (session == NULL) |
| return 0; |
| |
| if (xb->page_len == 0) { |
| length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; |
| } else { |
| if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) |
| tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; |
| |
| length = xb->head[0].iov_len + xb->page_len + tlen + pad; |
| } |
| dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, |
| length, xb->page_len, tlen, pad); |
| |
| if (length > session->se_fchannel.maxresp_sz) |
| return nfserr_rep_too_big; |
| |
| if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) && |
| length > session->se_fchannel.maxresp_cached) |
| return nfserr_rep_too_big_to_cache; |
| |
| return 0; |
| } |
| |
| void |
| nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) |
| { |
| struct nfs4_stateowner *so = resp->cstate.replay_owner; |
| __be32 *statp; |
| __be32 *p; |
| |
| RESERVE_SPACE(8); |
| WRITE32(op->opnum); |
| statp = p++; /* to be backfilled at the end */ |
| ADJUST_ARGS(); |
| |
| if (op->opnum == OP_ILLEGAL) |
| goto status; |
| BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || |
| !nfsd4_enc_ops[op->opnum]); |
| op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); |
| /* nfsd4_check_drc_limit guarantees enough room for error status */ |
| if (!op->status) |
| op->status = nfsd4_check_resp_size(resp, 0); |
| if (so) { |
| so->so_replay.rp_status = op->status; |
| so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1); |
| memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen); |
| } |
| status: |
| /* |
| * Note: We write the status directly, instead of using WRITE32(), |
| * since it is already in network byte order. |
| */ |
| *statp = op->status; |
| } |
| |
| /* |
| * Encode the reply stored in the stateowner reply cache |
| * |
| * XDR note: do not encode rp->rp_buflen: the buffer contains the |
| * previously sent already encoded operation. |
| * |
| * called with nfs4_lock_state() held |
| */ |
| void |
| nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) |
| { |
| __be32 *p; |
| struct nfs4_replay *rp = op->replay; |
| |
| BUG_ON(!rp); |
| |
| RESERVE_SPACE(8); |
| WRITE32(op->opnum); |
| *p++ = rp->rp_status; /* already xdr'ed */ |
| ADJUST_ARGS(); |
| |
| RESERVE_SPACE(rp->rp_buflen); |
| WRITEMEM(rp->rp_buf, rp->rp_buflen); |
| ADJUST_ARGS(); |
| } |
| |
| int |
| nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
| { |
| return xdr_ressize_check(rqstp, p); |
| } |
| |
| int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) |
| { |
| struct svc_rqst *rqstp = rq; |
| struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| |
| if (args->ops != args->iops) { |
| kfree(args->ops); |
| args->ops = args->iops; |
| } |
| kfree(args->tmpp); |
| args->tmpp = NULL; |
| while (args->to_free) { |
| struct tmpbuf *tb = args->to_free; |
| args->to_free = tb->next; |
| tb->release(tb->buf); |
| kfree(tb); |
| } |
| return 1; |
| } |
| |
| int |
| nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) |
| { |
| args->p = p; |
| args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; |
| args->pagelist = rqstp->rq_arg.pages; |
| args->pagelen = rqstp->rq_arg.page_len; |
| args->tmpp = NULL; |
| args->to_free = NULL; |
| args->ops = args->iops; |
| args->rqstp = rqstp; |
| |
| return !nfsd4_decode_compound(args); |
| } |
| |
| int |
| nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) |
| { |
| /* |
| * All that remains is to write the tag and operation count... |
| */ |
| struct nfsd4_compound_state *cs = &resp->cstate; |
| struct kvec *iov; |
| p = resp->tagp; |
| *p++ = htonl(resp->taglen); |
| memcpy(p, resp->tag, resp->taglen); |
| p += XDR_QUADLEN(resp->taglen); |
| *p++ = htonl(resp->opcnt); |
| |
| if (rqstp->rq_res.page_len) |
| iov = &rqstp->rq_res.tail[0]; |
| else |
| iov = &rqstp->rq_res.head[0]; |
| iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; |
| BUG_ON(iov->iov_len > PAGE_SIZE); |
| if (nfsd4_has_session(cs)) { |
| struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| struct nfs4_client *clp = cs->session->se_client; |
| if (cs->status != nfserr_replay_cache) { |
| nfsd4_store_cache_entry(resp); |
| cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; |
| } |
| /* Renew the clientid on success and on replay */ |
| spin_lock(&nn->client_lock); |
| nfsd4_put_session(cs->session); |
| spin_unlock(&nn->client_lock); |
| put_client_renew(clp); |
| } |
| return 1; |
| } |
| |
| /* |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |