Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/nfs/nfs4proc.c |
| 3 | * |
| 4 | * Client-side procedure declarations for NFSv4. |
| 5 | * |
| 6 | * Copyright (c) 2002 The Regents of the University of Michigan. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Kendrick Smith <kmsmith@umich.edu> |
| 10 | * Andy Adamson <andros@umich.edu> |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * |
| 16 | * 1. Redistributions of source code must retain the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer. |
| 18 | * 2. Redistributions in binary form must reproduce the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer in the |
| 20 | * documentation and/or other materials provided with the distribution. |
| 21 | * 3. Neither the name of the University nor the names of its |
| 22 | * contributors may be used to endorse or promote products derived |
| 23 | * from this software without specific prior written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | #include <linux/mm.h> |
| 39 | #include <linux/utsname.h> |
| 40 | #include <linux/delay.h> |
| 41 | #include <linux/errno.h> |
| 42 | #include <linux/string.h> |
| 43 | #include <linux/sunrpc/clnt.h> |
| 44 | #include <linux/nfs.h> |
| 45 | #include <linux/nfs4.h> |
| 46 | #include <linux/nfs_fs.h> |
| 47 | #include <linux/nfs_page.h> |
| 48 | #include <linux/smp_lock.h> |
| 49 | #include <linux/namei.h> |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 50 | #include <linux/mount.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 52 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include "delegation.h" |
| 54 | |
| 55 | #define NFSDBG_FACILITY NFSDBG_PROC |
| 56 | |
| 57 | #define NFS4_POLL_RETRY_MIN (1*HZ) |
| 58 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
| 59 | |
Trond Myklebust | 0a8838f | 2005-10-18 14:20:14 -0700 | [diff] [blame] | 60 | static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 62 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 64 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); |
| 66 | extern struct rpc_procinfo nfs4_procedures[]; |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | /* Prevent leaks of NFSv4 errors into userland */ |
| 69 | int nfs4_map_errors(int err) |
| 70 | { |
| 71 | if (err < -1000) { |
| 72 | dprintk("%s could not handle NFSv4 error %d\n", |
| 73 | __FUNCTION__, -err); |
| 74 | return -EIO; |
| 75 | } |
| 76 | return err; |
| 77 | } |
| 78 | |
| 79 | /* |
| 80 | * This is our standard bitmap for GETATTR requests. |
| 81 | */ |
| 82 | const u32 nfs4_fattr_bitmap[2] = { |
| 83 | FATTR4_WORD0_TYPE |
| 84 | | FATTR4_WORD0_CHANGE |
| 85 | | FATTR4_WORD0_SIZE |
| 86 | | FATTR4_WORD0_FSID |
| 87 | | FATTR4_WORD0_FILEID, |
| 88 | FATTR4_WORD1_MODE |
| 89 | | FATTR4_WORD1_NUMLINKS |
| 90 | | FATTR4_WORD1_OWNER |
| 91 | | FATTR4_WORD1_OWNER_GROUP |
| 92 | | FATTR4_WORD1_RAWDEV |
| 93 | | FATTR4_WORD1_SPACE_USED |
| 94 | | FATTR4_WORD1_TIME_ACCESS |
| 95 | | FATTR4_WORD1_TIME_METADATA |
| 96 | | FATTR4_WORD1_TIME_MODIFY |
| 97 | }; |
| 98 | |
| 99 | const u32 nfs4_statfs_bitmap[2] = { |
| 100 | FATTR4_WORD0_FILES_AVAIL |
| 101 | | FATTR4_WORD0_FILES_FREE |
| 102 | | FATTR4_WORD0_FILES_TOTAL, |
| 103 | FATTR4_WORD1_SPACE_AVAIL |
| 104 | | FATTR4_WORD1_SPACE_FREE |
| 105 | | FATTR4_WORD1_SPACE_TOTAL |
| 106 | }; |
| 107 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 108 | const u32 nfs4_pathconf_bitmap[2] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | FATTR4_WORD0_MAXLINK |
| 110 | | FATTR4_WORD0_MAXNAME, |
| 111 | 0 |
| 112 | }; |
| 113 | |
| 114 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE |
| 115 | | FATTR4_WORD0_MAXREAD |
| 116 | | FATTR4_WORD0_MAXWRITE |
| 117 | | FATTR4_WORD0_LEASE_TIME, |
| 118 | 0 |
| 119 | }; |
| 120 | |
| 121 | static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry, |
| 122 | struct nfs4_readdir_arg *readdir) |
| 123 | { |
| 124 | u32 *start, *p; |
| 125 | |
| 126 | BUG_ON(readdir->count < 80); |
| 127 | if (cookie > 2) { |
Adrian Bunk | b7ef195 | 2005-06-22 17:16:28 +0000 | [diff] [blame] | 128 | readdir->cookie = cookie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
| 130 | return; |
| 131 | } |
| 132 | |
| 133 | readdir->cookie = 0; |
| 134 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); |
| 135 | if (cookie == 2) |
| 136 | return; |
| 137 | |
| 138 | /* |
| 139 | * NFSv4 servers do not return entries for '.' and '..' |
| 140 | * Therefore, we fake these entries here. We let '.' |
| 141 | * have cookie 0 and '..' have cookie 1. Note that |
| 142 | * when talking to the server, we always send cookie 0 |
| 143 | * instead of 1 or 2. |
| 144 | */ |
| 145 | start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0); |
| 146 | |
| 147 | if (cookie == 0) { |
| 148 | *p++ = xdr_one; /* next */ |
| 149 | *p++ = xdr_zero; /* cookie, first word */ |
| 150 | *p++ = xdr_one; /* cookie, second word */ |
| 151 | *p++ = xdr_one; /* entry len */ |
| 152 | memcpy(p, ".\0\0\0", 4); /* entry */ |
| 153 | p++; |
| 154 | *p++ = xdr_one; /* bitmap length */ |
| 155 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| 156 | *p++ = htonl(8); /* attribute buffer length */ |
| 157 | p = xdr_encode_hyper(p, dentry->d_inode->i_ino); |
| 158 | } |
| 159 | |
| 160 | *p++ = xdr_one; /* next */ |
| 161 | *p++ = xdr_zero; /* cookie, first word */ |
| 162 | *p++ = xdr_two; /* cookie, second word */ |
| 163 | *p++ = xdr_two; /* entry len */ |
| 164 | memcpy(p, "..\0\0", 4); /* entry */ |
| 165 | p++; |
| 166 | *p++ = xdr_one; /* bitmap length */ |
| 167 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| 168 | *p++ = htonl(8); /* attribute buffer length */ |
| 169 | p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino); |
| 170 | |
| 171 | readdir->pgbase = (char *)p - (char *)start; |
| 172 | readdir->count -= readdir->pgbase; |
| 173 | kunmap_atomic(start, KM_USER0); |
| 174 | } |
| 175 | |
| 176 | static void |
| 177 | renew_lease(struct nfs_server *server, unsigned long timestamp) |
| 178 | { |
| 179 | struct nfs4_client *clp = server->nfs4_state; |
| 180 | spin_lock(&clp->cl_lock); |
| 181 | if (time_before(clp->cl_last_renewal,timestamp)) |
| 182 | clp->cl_last_renewal = timestamp; |
| 183 | spin_unlock(&clp->cl_lock); |
| 184 | } |
| 185 | |
| 186 | static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo) |
| 187 | { |
| 188 | struct nfs_inode *nfsi = NFS_I(inode); |
| 189 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 190 | spin_lock(&inode->i_lock); |
| 191 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | if (cinfo->before == nfsi->change_attr && cinfo->atomic) |
| 193 | nfsi->change_attr = cinfo->after; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 194 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 197 | /* Helper for asynchronous RPC calls */ |
| 198 | static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin, |
| 199 | rpc_action tk_exit, void *calldata) |
| 200 | { |
| 201 | struct rpc_task *task; |
| 202 | |
| 203 | if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC))) |
| 204 | return -ENOMEM; |
| 205 | |
| 206 | task->tk_calldata = calldata; |
| 207 | task->tk_action = tk_begin; |
| 208 | rpc_execute(task); |
| 209 | return 0; |
| 210 | } |
| 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) |
| 213 | { |
| 214 | struct inode *inode = state->inode; |
| 215 | |
| 216 | open_flags &= (FMODE_READ|FMODE_WRITE); |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 217 | /* Protect against nfs4_find_state_byowner() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 218 | spin_lock(&state->owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | spin_lock(&inode->i_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 220 | memcpy(&state->stateid, stateid, sizeof(state->stateid)); |
| 221 | if ((open_flags & FMODE_WRITE)) |
| 222 | state->nwriters++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | if (open_flags & FMODE_READ) |
| 224 | state->nreaders++; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 225 | nfs4_state_set_mode_locked(state, state->state | open_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 227 | spin_unlock(&state->owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | /* |
| 231 | * OPEN_RECLAIM: |
| 232 | * reclaim state on the server after a reboot. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | */ |
| 234 | static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 235 | { |
| 236 | struct inode *inode = state->inode; |
| 237 | struct nfs_server *server = NFS_SERVER(inode); |
| 238 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
| 239 | struct nfs_openargs o_arg = { |
| 240 | .fh = NFS_FH(inode), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | .id = sp->so_id, |
| 242 | .open_flags = state->state, |
| 243 | .clientid = server->nfs4_state->cl_clientid, |
| 244 | .claim = NFS4_OPEN_CLAIM_PREVIOUS, |
| 245 | .bitmask = server->attr_bitmask, |
| 246 | }; |
| 247 | struct nfs_openres o_res = { |
| 248 | .server = server, /* Grrr */ |
| 249 | }; |
| 250 | struct rpc_message msg = { |
| 251 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR], |
| 252 | .rpc_argp = &o_arg, |
| 253 | .rpc_resp = &o_res, |
| 254 | .rpc_cred = sp->so_cred, |
| 255 | }; |
| 256 | int status; |
| 257 | |
| 258 | if (delegation != NULL) { |
| 259 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { |
| 260 | memcpy(&state->stateid, &delegation->stateid, |
| 261 | sizeof(state->stateid)); |
| 262 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
| 263 | return 0; |
| 264 | } |
| 265 | o_arg.u.delegation_type = delegation->type; |
| 266 | } |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 267 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| 268 | if (o_arg.seqid == NULL) |
| 269 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 271 | /* Confirm the sequence as being established */ |
| 272 | nfs_confirm_seqid(&sp->so_seqid, status); |
| 273 | nfs_increment_open_seqid(status, o_arg.seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | if (status == 0) { |
| 275 | memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); |
| 276 | if (o_res.delegation_type != 0) { |
| 277 | nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); |
| 278 | /* Did the server issue an immediate delegation recall? */ |
| 279 | if (o_res.do_recall) |
| 280 | nfs_async_inode_return_delegation(inode, &o_res.stateid); |
| 281 | } |
| 282 | } |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 283 | nfs_free_seqid(o_arg.seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 285 | /* Ensure we update the inode attributes */ |
| 286 | NFS_CACHEINV(inode); |
| 287 | return status; |
| 288 | } |
| 289 | |
| 290 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 291 | { |
| 292 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 293 | struct nfs4_exception exception = { }; |
| 294 | int err; |
| 295 | do { |
| 296 | err = _nfs4_open_reclaim(sp, state); |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 297 | if (err != -NFS4ERR_DELAY) |
| 298 | break; |
| 299 | nfs4_handle_exception(server, err, &exception); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } while (exception.retry); |
| 301 | return err; |
| 302 | } |
| 303 | |
| 304 | static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) |
| 305 | { |
| 306 | struct nfs4_state_owner *sp = state->owner; |
| 307 | struct inode *inode = dentry->d_inode; |
| 308 | struct nfs_server *server = NFS_SERVER(inode); |
| 309 | struct dentry *parent = dget_parent(dentry); |
| 310 | struct nfs_openargs arg = { |
| 311 | .fh = NFS_FH(parent->d_inode), |
| 312 | .clientid = server->nfs4_state->cl_clientid, |
| 313 | .name = &dentry->d_name, |
| 314 | .id = sp->so_id, |
| 315 | .server = server, |
| 316 | .bitmask = server->attr_bitmask, |
| 317 | .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR, |
| 318 | }; |
| 319 | struct nfs_openres res = { |
| 320 | .server = server, |
| 321 | }; |
| 322 | struct rpc_message msg = { |
| 323 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR], |
| 324 | .rpc_argp = &arg, |
| 325 | .rpc_resp = &res, |
| 326 | .rpc_cred = sp->so_cred, |
| 327 | }; |
| 328 | int status = 0; |
| 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 331 | goto out; |
| 332 | if (state->state == 0) |
| 333 | goto out; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 334 | arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| 335 | status = -ENOMEM; |
| 336 | if (arg.seqid == NULL) |
| 337 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | arg.open_flags = state->state; |
| 339 | memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data)); |
| 340 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 341 | nfs_increment_open_seqid(status, arg.seqid); |
Trond Myklebust | 0a8838f | 2005-10-18 14:20:14 -0700 | [diff] [blame] | 342 | if (status != 0) |
| 343 | goto out_free; |
| 344 | if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| 345 | status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode), |
| 346 | sp, &res.stateid, arg.seqid); |
| 347 | if (status != 0) |
| 348 | goto out_free; |
| 349 | } |
| 350 | nfs_confirm_seqid(&sp->so_seqid, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | if (status >= 0) { |
| 352 | memcpy(state->stateid.data, res.stateid.data, |
| 353 | sizeof(state->stateid.data)); |
| 354 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 355 | } |
Trond Myklebust | 0a8838f | 2005-10-18 14:20:14 -0700 | [diff] [blame] | 356 | out_free: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 357 | nfs_free_seqid(arg.seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | dput(parent); |
| 360 | return status; |
| 361 | } |
| 362 | |
| 363 | int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) |
| 364 | { |
| 365 | struct nfs4_exception exception = { }; |
| 366 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); |
| 367 | int err; |
| 368 | do { |
| 369 | err = _nfs4_open_delegation_recall(dentry, state); |
| 370 | switch (err) { |
| 371 | case 0: |
| 372 | return err; |
| 373 | case -NFS4ERR_STALE_CLIENTID: |
| 374 | case -NFS4ERR_STALE_STATEID: |
| 375 | case -NFS4ERR_EXPIRED: |
| 376 | /* Don't recall a delegation if it was lost */ |
| 377 | nfs4_schedule_state_recovery(server->nfs4_state); |
| 378 | return err; |
| 379 | } |
| 380 | err = nfs4_handle_exception(server, err, &exception); |
| 381 | } while (exception.retry); |
| 382 | return err; |
| 383 | } |
| 384 | |
Trond Myklebust | 0a8838f | 2005-10-18 14:20:14 -0700 | [diff] [blame] | 385 | static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { |
| 387 | struct nfs_open_confirmargs arg = { |
| 388 | .fh = fh, |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 389 | .seqid = seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | .stateid = *stateid, |
| 391 | }; |
| 392 | struct nfs_open_confirmres res; |
| 393 | struct rpc_message msg = { |
| 394 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], |
| 395 | .rpc_argp = &arg, |
| 396 | .rpc_resp = &res, |
| 397 | .rpc_cred = sp->so_cred, |
| 398 | }; |
| 399 | int status; |
| 400 | |
| 401 | status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 402 | /* Confirm the sequence as being established */ |
| 403 | nfs_confirm_seqid(&sp->so_seqid, status); |
| 404 | nfs_increment_open_seqid(status, seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | if (status >= 0) |
| 406 | memcpy(stateid, &res.stateid, sizeof(*stateid)); |
| 407 | return status; |
| 408 | } |
| 409 | |
| 410 | static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res) |
| 411 | { |
| 412 | struct nfs_server *server = NFS_SERVER(dir); |
| 413 | struct rpc_message msg = { |
| 414 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], |
| 415 | .rpc_argp = o_arg, |
| 416 | .rpc_resp = o_res, |
| 417 | .rpc_cred = sp->so_cred, |
| 418 | }; |
| 419 | int status; |
| 420 | |
| 421 | /* Update sequence id. The caller must serialize! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | o_arg->id = sp->so_id; |
| 423 | o_arg->clientid = sp->so_client->cl_clientid; |
| 424 | |
| 425 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
Trond Myklebust | 6f926b5 | 2005-10-18 14:20:18 -0700 | [diff] [blame] | 426 | if (status == 0) { |
| 427 | /* OPEN on anything except a regular file is disallowed in NFSv4 */ |
| 428 | switch (o_res->f_attr->mode & S_IFMT) { |
| 429 | case S_IFREG: |
| 430 | break; |
| 431 | case S_IFLNK: |
| 432 | status = -ELOOP; |
| 433 | break; |
| 434 | case S_IFDIR: |
| 435 | status = -EISDIR; |
| 436 | break; |
| 437 | default: |
| 438 | status = -ENOTDIR; |
| 439 | } |
| 440 | } |
| 441 | |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 442 | nfs_increment_open_seqid(status, o_arg->seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | if (status != 0) |
| 444 | goto out; |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 445 | if (o_arg->open_flags & O_CREAT) { |
| 446 | update_changeattr(dir, &o_res->cinfo); |
| 447 | nfs_post_op_update_inode(dir, o_res->dir_attr); |
| 448 | } else |
| 449 | nfs_refresh_inode(dir, o_res->dir_attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| 451 | status = _nfs4_proc_open_confirm(server->client, &o_res->fh, |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 452 | sp, &o_res->stateid, o_arg->seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (status != 0) |
| 454 | goto out; |
| 455 | } |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 456 | nfs_confirm_seqid(&sp->so_seqid, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
| 458 | status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); |
| 459 | out: |
| 460 | return status; |
| 461 | } |
| 462 | |
| 463 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) |
| 464 | { |
| 465 | struct nfs_access_entry cache; |
| 466 | int mask = 0; |
| 467 | int status; |
| 468 | |
| 469 | if (openflags & FMODE_READ) |
| 470 | mask |= MAY_READ; |
| 471 | if (openflags & FMODE_WRITE) |
| 472 | mask |= MAY_WRITE; |
| 473 | status = nfs_access_get_cached(inode, cred, &cache); |
| 474 | if (status == 0) |
| 475 | goto out; |
| 476 | |
| 477 | /* Be clever: ask server to check for all possible rights */ |
| 478 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; |
| 479 | cache.cred = cred; |
| 480 | cache.jiffies = jiffies; |
| 481 | status = _nfs4_proc_access(inode, &cache); |
| 482 | if (status != 0) |
| 483 | return status; |
| 484 | nfs_access_add_cache(inode, &cache); |
| 485 | out: |
| 486 | if ((cache.mask & mask) == mask) |
| 487 | return 0; |
| 488 | return -EACCES; |
| 489 | } |
| 490 | |
| 491 | /* |
| 492 | * OPEN_EXPIRED: |
| 493 | * reclaim state on the server after a network partition. |
| 494 | * Assumes caller holds the appropriate lock |
| 495 | */ |
| 496 | static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
| 497 | { |
| 498 | struct dentry *parent = dget_parent(dentry); |
| 499 | struct inode *dir = parent->d_inode; |
| 500 | struct inode *inode = state->inode; |
| 501 | struct nfs_server *server = NFS_SERVER(dir); |
| 502 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 503 | struct nfs_fattr f_attr, dir_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | struct nfs_openargs o_arg = { |
| 505 | .fh = NFS_FH(dir), |
| 506 | .open_flags = state->state, |
| 507 | .name = &dentry->d_name, |
| 508 | .bitmask = server->attr_bitmask, |
| 509 | .claim = NFS4_OPEN_CLAIM_NULL, |
| 510 | }; |
| 511 | struct nfs_openres o_res = { |
| 512 | .f_attr = &f_attr, |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 513 | .dir_attr = &dir_attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | .server = server, |
| 515 | }; |
| 516 | int status = 0; |
| 517 | |
| 518 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { |
| 519 | status = _nfs4_do_access(inode, sp->so_cred, state->state); |
| 520 | if (status < 0) |
| 521 | goto out; |
| 522 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); |
| 523 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
| 524 | goto out; |
| 525 | } |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 526 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| 527 | status = -ENOMEM; |
| 528 | if (o_arg.seqid == NULL) |
| 529 | goto out; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 530 | nfs_fattr_init(&f_attr); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 531 | nfs_fattr_init(&dir_attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); |
| 533 | if (status != 0) |
| 534 | goto out_nodeleg; |
| 535 | /* Check if files differ */ |
| 536 | if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT)) |
| 537 | goto out_stale; |
| 538 | /* Has the file handle changed? */ |
| 539 | if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) { |
| 540 | /* Verify if the change attributes are the same */ |
| 541 | if (f_attr.change_attr != NFS_I(inode)->change_attr) |
| 542 | goto out_stale; |
| 543 | if (nfs_size_to_loff_t(f_attr.size) != inode->i_size) |
| 544 | goto out_stale; |
| 545 | /* Lets just pretend that this is the same file */ |
| 546 | nfs_copy_fh(NFS_FH(inode), &o_res.fh); |
| 547 | NFS_I(inode)->fileid = f_attr.fileid; |
| 548 | } |
| 549 | memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); |
| 550 | if (o_res.delegation_type != 0) { |
| 551 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) |
| 552 | nfs_inode_set_delegation(inode, sp->so_cred, &o_res); |
| 553 | else |
| 554 | nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); |
| 555 | } |
| 556 | out_nodeleg: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 557 | nfs_free_seqid(o_arg.seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 559 | out: |
| 560 | dput(parent); |
| 561 | return status; |
| 562 | out_stale: |
| 563 | status = -ESTALE; |
| 564 | /* Invalidate the state owner so we don't ever use it again */ |
| 565 | nfs4_drop_state_owner(sp); |
| 566 | d_drop(dentry); |
| 567 | /* Should we be trying to close that stateid? */ |
| 568 | goto out_nodeleg; |
| 569 | } |
| 570 | |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 571 | static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
| 572 | { |
| 573 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); |
| 574 | struct nfs4_exception exception = { }; |
| 575 | int err; |
| 576 | |
| 577 | do { |
| 578 | err = _nfs4_open_expired(sp, state, dentry); |
| 579 | if (err == -NFS4ERR_DELAY) |
| 580 | nfs4_handle_exception(server, err, &exception); |
| 581 | } while (exception.retry); |
| 582 | return err; |
| 583 | } |
| 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 586 | { |
| 587 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 588 | struct nfs_open_context *ctx; |
| 589 | int status; |
| 590 | |
| 591 | spin_lock(&state->inode->i_lock); |
| 592 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 593 | if (ctx->state != state) |
| 594 | continue; |
| 595 | get_nfs_open_context(ctx); |
| 596 | spin_unlock(&state->inode->i_lock); |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 597 | status = nfs4_do_open_expired(sp, state, ctx->dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | put_nfs_open_context(ctx); |
| 599 | return status; |
| 600 | } |
| 601 | spin_unlock(&state->inode->i_lock); |
| 602 | return -ENOENT; |
| 603 | } |
| 604 | |
| 605 | /* |
| 606 | * Returns an nfs4_state + an extra reference to the inode |
| 607 | */ |
| 608 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) |
| 609 | { |
| 610 | struct nfs_delegation *delegation; |
| 611 | struct nfs_server *server = NFS_SERVER(inode); |
| 612 | struct nfs4_client *clp = server->nfs4_state; |
| 613 | struct nfs_inode *nfsi = NFS_I(inode); |
| 614 | struct nfs4_state_owner *sp = NULL; |
| 615 | struct nfs4_state *state = NULL; |
| 616 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); |
| 617 | int err; |
| 618 | |
| 619 | /* Protect against reboot recovery - NOTE ORDER! */ |
| 620 | down_read(&clp->cl_sem); |
| 621 | /* Protect against delegation recall */ |
| 622 | down_read(&nfsi->rwsem); |
| 623 | delegation = NFS_I(inode)->delegation; |
| 624 | err = -ENOENT; |
| 625 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) |
| 626 | goto out_err; |
| 627 | err = -ENOMEM; |
| 628 | if (!(sp = nfs4_get_state_owner(server, cred))) { |
| 629 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); |
| 630 | goto out_err; |
| 631 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | state = nfs4_get_open_state(inode, sp); |
| 633 | if (state == NULL) |
| 634 | goto out_err; |
| 635 | |
| 636 | err = -ENOENT; |
| 637 | if ((state->state & open_flags) == open_flags) { |
| 638 | spin_lock(&inode->i_lock); |
| 639 | if (open_flags & FMODE_READ) |
| 640 | state->nreaders++; |
| 641 | if (open_flags & FMODE_WRITE) |
| 642 | state->nwriters++; |
| 643 | spin_unlock(&inode->i_lock); |
| 644 | goto out_ok; |
| 645 | } else if (state->state != 0) |
| 646 | goto out_err; |
| 647 | |
| 648 | lock_kernel(); |
| 649 | err = _nfs4_do_access(inode, cred, open_flags); |
| 650 | unlock_kernel(); |
| 651 | if (err != 0) |
| 652 | goto out_err; |
| 653 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
| 654 | update_open_stateid(state, &delegation->stateid, open_flags); |
| 655 | out_ok: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | nfs4_put_state_owner(sp); |
| 657 | up_read(&nfsi->rwsem); |
| 658 | up_read(&clp->cl_sem); |
| 659 | igrab(inode); |
| 660 | *res = state; |
| 661 | return 0; |
| 662 | out_err: |
| 663 | if (sp != NULL) { |
| 664 | if (state != NULL) |
| 665 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | nfs4_put_state_owner(sp); |
| 667 | } |
| 668 | up_read(&nfsi->rwsem); |
| 669 | up_read(&clp->cl_sem); |
Trond Myklebust | b8e5c4c | 2005-10-18 14:20:20 -0700 | [diff] [blame] | 670 | if (err != -EACCES) |
| 671 | nfs_inode_return_delegation(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | return err; |
| 673 | } |
| 674 | |
| 675 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) |
| 676 | { |
| 677 | struct nfs4_exception exception = { }; |
| 678 | struct nfs4_state *res; |
| 679 | int err; |
| 680 | |
| 681 | do { |
| 682 | err = _nfs4_open_delegated(inode, flags, cred, &res); |
| 683 | if (err == 0) |
| 684 | break; |
| 685 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), |
| 686 | err, &exception)); |
| 687 | } while (exception.retry); |
| 688 | return res; |
| 689 | } |
| 690 | |
| 691 | /* |
| 692 | * Returns an nfs4_state + an referenced inode |
| 693 | */ |
| 694 | static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) |
| 695 | { |
| 696 | struct nfs4_state_owner *sp; |
| 697 | struct nfs4_state *state = NULL; |
| 698 | struct nfs_server *server = NFS_SERVER(dir); |
| 699 | struct nfs4_client *clp = server->nfs4_state; |
| 700 | struct inode *inode = NULL; |
| 701 | int status; |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 702 | struct nfs_fattr f_attr, dir_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | struct nfs_openargs o_arg = { |
| 704 | .fh = NFS_FH(dir), |
| 705 | .open_flags = flags, |
| 706 | .name = &dentry->d_name, |
| 707 | .server = server, |
| 708 | .bitmask = server->attr_bitmask, |
| 709 | .claim = NFS4_OPEN_CLAIM_NULL, |
| 710 | }; |
| 711 | struct nfs_openres o_res = { |
| 712 | .f_attr = &f_attr, |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 713 | .dir_attr = &dir_attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | .server = server, |
| 715 | }; |
| 716 | |
| 717 | /* Protect against reboot recovery conflicts */ |
| 718 | down_read(&clp->cl_sem); |
| 719 | status = -ENOMEM; |
| 720 | if (!(sp = nfs4_get_state_owner(server, cred))) { |
| 721 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); |
| 722 | goto out_err; |
| 723 | } |
| 724 | if (flags & O_EXCL) { |
| 725 | u32 *p = (u32 *) o_arg.u.verifier.data; |
| 726 | p[0] = jiffies; |
| 727 | p[1] = current->pid; |
| 728 | } else |
| 729 | o_arg.u.attrs = sattr; |
| 730 | /* Serialization for the sequence id */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 732 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| 733 | if (o_arg.seqid == NULL) |
| 734 | return -ENOMEM; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 735 | nfs_fattr_init(&f_attr); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 736 | nfs_fattr_init(&dir_attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); |
| 738 | if (status != 0) |
| 739 | goto out_err; |
| 740 | |
| 741 | status = -ENOMEM; |
| 742 | inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr); |
| 743 | if (!inode) |
| 744 | goto out_err; |
| 745 | state = nfs4_get_open_state(inode, sp); |
| 746 | if (!state) |
| 747 | goto out_err; |
| 748 | update_open_stateid(state, &o_res.stateid, flags); |
| 749 | if (o_res.delegation_type != 0) |
| 750 | nfs_inode_set_delegation(inode, cred, &o_res); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 751 | nfs_free_seqid(o_arg.seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | nfs4_put_state_owner(sp); |
| 753 | up_read(&clp->cl_sem); |
| 754 | *res = state; |
| 755 | return 0; |
| 756 | out_err: |
| 757 | if (sp != NULL) { |
| 758 | if (state != NULL) |
| 759 | nfs4_put_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 760 | nfs_free_seqid(o_arg.seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | nfs4_put_state_owner(sp); |
| 762 | } |
| 763 | /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */ |
| 764 | up_read(&clp->cl_sem); |
| 765 | if (inode != NULL) |
| 766 | iput(inode); |
| 767 | *res = NULL; |
| 768 | return status; |
| 769 | } |
| 770 | |
| 771 | |
| 772 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred) |
| 773 | { |
| 774 | struct nfs4_exception exception = { }; |
| 775 | struct nfs4_state *res; |
| 776 | int status; |
| 777 | |
| 778 | do { |
| 779 | status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res); |
| 780 | if (status == 0) |
| 781 | break; |
| 782 | /* NOTE: BAD_SEQID means the server and client disagree about the |
| 783 | * book-keeping w.r.t. state-changing operations |
| 784 | * (OPEN/CLOSE/LOCK/LOCKU...) |
| 785 | * It is actually a sign of a bug on the client or on the server. |
| 786 | * |
| 787 | * If we receive a BAD_SEQID error in the particular case of |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 788 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | * have unhashed the old state_owner for us, and that we can |
| 790 | * therefore safely retry using a new one. We should still warn |
| 791 | * the user though... |
| 792 | */ |
| 793 | if (status == -NFS4ERR_BAD_SEQID) { |
| 794 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); |
| 795 | exception.retry = 1; |
| 796 | continue; |
| 797 | } |
Trond Myklebust | 550f574 | 2005-10-18 14:20:21 -0700 | [diff] [blame] | 798 | /* |
| 799 | * BAD_STATEID on OPEN means that the server cancelled our |
| 800 | * state before it received the OPEN_CONFIRM. |
| 801 | * Recover by retrying the request as per the discussion |
| 802 | * on Page 181 of RFC3530. |
| 803 | */ |
| 804 | if (status == -NFS4ERR_BAD_STATEID) { |
| 805 | exception.retry = 1; |
| 806 | continue; |
| 807 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
| 809 | status, &exception)); |
| 810 | } while (exception.retry); |
| 811 | return res; |
| 812 | } |
| 813 | |
| 814 | static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, |
| 815 | struct nfs_fh *fhandle, struct iattr *sattr, |
| 816 | struct nfs4_state *state) |
| 817 | { |
| 818 | struct nfs_setattrargs arg = { |
| 819 | .fh = fhandle, |
| 820 | .iap = sattr, |
| 821 | .server = server, |
| 822 | .bitmask = server->attr_bitmask, |
| 823 | }; |
| 824 | struct nfs_setattrres res = { |
| 825 | .fattr = fattr, |
| 826 | .server = server, |
| 827 | }; |
| 828 | struct rpc_message msg = { |
| 829 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
| 830 | .rpc_argp = &arg, |
| 831 | .rpc_resp = &res, |
| 832 | }; |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 833 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 835 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 837 | if (state != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | msg.rpc_cred = state->owner->so_cred; |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 839 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
| 840 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
| 842 | |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 843 | status = rpc_call_sync(server->client, &msg, 0); |
| 844 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, |
| 848 | struct nfs_fh *fhandle, struct iattr *sattr, |
| 849 | struct nfs4_state *state) |
| 850 | { |
| 851 | struct nfs4_exception exception = { }; |
| 852 | int err; |
| 853 | do { |
| 854 | err = nfs4_handle_exception(server, |
| 855 | _nfs4_do_setattr(server, fattr, fhandle, sattr, |
| 856 | state), |
| 857 | &exception); |
| 858 | } while (exception.retry); |
| 859 | return err; |
| 860 | } |
| 861 | |
| 862 | struct nfs4_closedata { |
| 863 | struct inode *inode; |
| 864 | struct nfs4_state *state; |
| 865 | struct nfs_closeargs arg; |
| 866 | struct nfs_closeres res; |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 867 | struct nfs_fattr fattr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | }; |
| 869 | |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 870 | static void nfs4_free_closedata(struct nfs4_closedata *calldata) |
| 871 | { |
| 872 | struct nfs4_state *state = calldata->state; |
| 873 | struct nfs4_state_owner *sp = state->owner; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 874 | |
| 875 | nfs4_put_open_state(calldata->state); |
| 876 | nfs_free_seqid(calldata->arg.seqid); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 877 | nfs4_put_state_owner(sp); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 878 | kfree(calldata); |
| 879 | } |
| 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | static void nfs4_close_done(struct rpc_task *task) |
| 882 | { |
| 883 | struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata; |
| 884 | struct nfs4_state *state = calldata->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
| 886 | |
| 887 | /* hmm. we are done with the inode, and in the process of freeing |
| 888 | * the state_owner. we keep this around to process errors |
| 889 | */ |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 890 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | switch (task->tk_status) { |
| 892 | case 0: |
| 893 | memcpy(&state->stateid, &calldata->res.stateid, |
| 894 | sizeof(state->stateid)); |
| 895 | break; |
| 896 | case -NFS4ERR_STALE_STATEID: |
| 897 | case -NFS4ERR_EXPIRED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | nfs4_schedule_state_recovery(server->nfs4_state); |
| 899 | break; |
| 900 | default: |
| 901 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { |
| 902 | rpc_restart_call(task); |
| 903 | return; |
| 904 | } |
| 905 | } |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 906 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 907 | nfs4_free_closedata(calldata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | } |
| 909 | |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 910 | static void nfs4_close_begin(struct rpc_task *task) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | { |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 912 | struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata; |
| 913 | struct nfs4_state *state = calldata->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | struct rpc_message msg = { |
| 915 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], |
| 916 | .rpc_argp = &calldata->arg, |
| 917 | .rpc_resp = &calldata->res, |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 918 | .rpc_cred = state->owner->so_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | }; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 920 | int mode = 0, old_mode; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 921 | int status; |
| 922 | |
| 923 | status = nfs_wait_on_sequence(calldata->arg.seqid, task); |
| 924 | if (status != 0) |
| 925 | return; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 926 | /* Recalculate the new open mode in case someone reopened the file |
| 927 | * while we were waiting in line to be scheduled. |
| 928 | */ |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 929 | spin_lock(&state->owner->so_lock); |
| 930 | spin_lock(&calldata->inode->i_lock); |
| 931 | mode = old_mode = state->state; |
| 932 | if (state->nreaders == 0) |
| 933 | mode &= ~FMODE_READ; |
| 934 | if (state->nwriters == 0) |
| 935 | mode &= ~FMODE_WRITE; |
| 936 | nfs4_state_set_mode_locked(state, mode); |
| 937 | spin_unlock(&calldata->inode->i_lock); |
| 938 | spin_unlock(&state->owner->so_lock); |
| 939 | if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 940 | nfs4_free_closedata(calldata); |
| 941 | task->tk_exit = NULL; |
| 942 | rpc_exit(task, 0); |
| 943 | return; |
| 944 | } |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 945 | nfs_fattr_init(calldata->res.fattr); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 946 | if (mode != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 948 | calldata->arg.open_flags = mode; |
| 949 | rpc_call_setup(task, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | } |
| 951 | |
| 952 | /* |
| 953 | * It is possible for data to be read/written from a mem-mapped file |
| 954 | * after the sys_close call (which hits the vfs layer as a flush). |
| 955 | * This means that we can't safely call nfsv4 close on a file until |
| 956 | * the inode is cleared. This in turn means that we are not good |
| 957 | * NFSv4 citizens - we do not indicate to the server to update the file's |
| 958 | * share state even when we are done with one of the three share |
| 959 | * stateid's in the inode. |
| 960 | * |
| 961 | * NOTE: Caller must be holding the sp->so_owner semaphore! |
| 962 | */ |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 963 | int nfs4_do_close(struct inode *inode, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | { |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 965 | struct nfs_server *server = NFS_SERVER(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | struct nfs4_closedata *calldata; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 967 | int status = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 969 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | if (calldata == NULL) |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 971 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | calldata->inode = inode; |
| 973 | calldata->state = state; |
| 974 | calldata->arg.fh = NFS_FH(inode); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 975 | calldata->arg.stateid = &state->stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | /* Serialization for the sequence id */ |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 977 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 978 | if (calldata->arg.seqid == NULL) |
| 979 | goto out_free_calldata; |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 980 | calldata->arg.bitmask = server->attr_bitmask; |
| 981 | calldata->res.fattr = &calldata->fattr; |
| 982 | calldata->res.server = server; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 983 | |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 984 | status = nfs4_call_async(server->client, nfs4_close_begin, |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 985 | nfs4_close_done, calldata); |
| 986 | if (status == 0) |
| 987 | goto out; |
| 988 | |
| 989 | nfs_free_seqid(calldata->arg.seqid); |
| 990 | out_free_calldata: |
| 991 | kfree(calldata); |
| 992 | out: |
| 993 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | } |
| 995 | |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 996 | static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state) |
| 997 | { |
| 998 | struct file *filp; |
| 999 | |
| 1000 | filp = lookup_instantiate_filp(nd, dentry, NULL); |
| 1001 | if (!IS_ERR(filp)) { |
| 1002 | struct nfs_open_context *ctx; |
| 1003 | ctx = (struct nfs_open_context *)filp->private_data; |
| 1004 | ctx->state = state; |
| 1005 | } else |
| 1006 | nfs4_close_state(state, nd->intent.open.flags); |
| 1007 | } |
| 1008 | |
| 1009 | struct dentry * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
| 1011 | { |
| 1012 | struct iattr attr; |
| 1013 | struct rpc_cred *cred; |
| 1014 | struct nfs4_state *state; |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1015 | struct dentry *res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
| 1017 | if (nd->flags & LOOKUP_CREATE) { |
| 1018 | attr.ia_mode = nd->intent.open.create_mode; |
| 1019 | attr.ia_valid = ATTR_MODE; |
| 1020 | if (!IS_POSIXACL(dir)) |
| 1021 | attr.ia_mode &= ~current->fs->umask; |
| 1022 | } else { |
| 1023 | attr.ia_valid = 0; |
| 1024 | BUG_ON(nd->intent.open.flags & O_CREAT); |
| 1025 | } |
| 1026 | |
| 1027 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); |
| 1028 | if (IS_ERR(cred)) |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1029 | return (struct dentry *)cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); |
| 1031 | put_rpccred(cred); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1032 | if (IS_ERR(state)) { |
| 1033 | if (PTR_ERR(state) == -ENOENT) |
| 1034 | d_add(dentry, NULL); |
| 1035 | return (struct dentry *)state; |
| 1036 | } |
| 1037 | res = d_add_unique(dentry, state->inode); |
| 1038 | if (res != NULL) |
| 1039 | dentry = res; |
| 1040 | nfs4_intent_set_file(nd, dentry, state); |
| 1041 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | } |
| 1043 | |
| 1044 | int |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1045 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | { |
| 1047 | struct rpc_cred *cred; |
| 1048 | struct nfs4_state *state; |
| 1049 | struct inode *inode; |
| 1050 | |
| 1051 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); |
| 1052 | if (IS_ERR(cred)) |
| 1053 | return PTR_ERR(cred); |
| 1054 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); |
| 1055 | if (IS_ERR(state)) |
| 1056 | state = nfs4_do_open(dir, dentry, openflags, NULL, cred); |
| 1057 | put_rpccred(cred); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1058 | if (IS_ERR(state)) { |
| 1059 | switch (PTR_ERR(state)) { |
| 1060 | case -EPERM: |
| 1061 | case -EACCES: |
| 1062 | case -EDQUOT: |
| 1063 | case -ENOSPC: |
| 1064 | case -EROFS: |
| 1065 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); |
| 1066 | return 1; |
| 1067 | case -ENOENT: |
| 1068 | if (dentry->d_inode == NULL) |
| 1069 | return 1; |
| 1070 | } |
| 1071 | goto out_drop; |
| 1072 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | inode = state->inode; |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1074 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | if (inode == dentry->d_inode) { |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1076 | nfs4_intent_set_file(nd, dentry, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | return 1; |
| 1078 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | nfs4_close_state(state, openflags); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1080 | out_drop: |
| 1081 | d_drop(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | return 0; |
| 1083 | } |
| 1084 | |
| 1085 | |
| 1086 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| 1087 | { |
| 1088 | struct nfs4_server_caps_res res = {}; |
| 1089 | struct rpc_message msg = { |
| 1090 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], |
| 1091 | .rpc_argp = fhandle, |
| 1092 | .rpc_resp = &res, |
| 1093 | }; |
| 1094 | int status; |
| 1095 | |
| 1096 | status = rpc_call_sync(server->client, &msg, 0); |
| 1097 | if (status == 0) { |
| 1098 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); |
| 1099 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
| 1100 | server->caps |= NFS_CAP_ACLS; |
| 1101 | if (res.has_links != 0) |
| 1102 | server->caps |= NFS_CAP_HARDLINKS; |
| 1103 | if (res.has_symlinks != 0) |
| 1104 | server->caps |= NFS_CAP_SYMLINKS; |
| 1105 | server->acl_bitmask = res.acl_bitmask; |
| 1106 | } |
| 1107 | return status; |
| 1108 | } |
| 1109 | |
| 1110 | static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| 1111 | { |
| 1112 | struct nfs4_exception exception = { }; |
| 1113 | int err; |
| 1114 | do { |
| 1115 | err = nfs4_handle_exception(server, |
| 1116 | _nfs4_server_capabilities(server, fhandle), |
| 1117 | &exception); |
| 1118 | } while (exception.retry); |
| 1119 | return err; |
| 1120 | } |
| 1121 | |
| 1122 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 1123 | struct nfs_fsinfo *info) |
| 1124 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | struct nfs4_lookup_root_arg args = { |
| 1126 | .bitmask = nfs4_fattr_bitmap, |
| 1127 | }; |
| 1128 | struct nfs4_lookup_res res = { |
| 1129 | .server = server, |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1130 | .fattr = info->fattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | .fh = fhandle, |
| 1132 | }; |
| 1133 | struct rpc_message msg = { |
| 1134 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], |
| 1135 | .rpc_argp = &args, |
| 1136 | .rpc_resp = &res, |
| 1137 | }; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1138 | nfs_fattr_init(info->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | return rpc_call_sync(server->client, &msg, 0); |
| 1140 | } |
| 1141 | |
| 1142 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 1143 | struct nfs_fsinfo *info) |
| 1144 | { |
| 1145 | struct nfs4_exception exception = { }; |
| 1146 | int err; |
| 1147 | do { |
| 1148 | err = nfs4_handle_exception(server, |
| 1149 | _nfs4_lookup_root(server, fhandle, info), |
| 1150 | &exception); |
| 1151 | } while (exception.retry); |
| 1152 | return err; |
| 1153 | } |
| 1154 | |
| 1155 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 1156 | struct nfs_fsinfo *info) |
| 1157 | { |
| 1158 | struct nfs_fattr * fattr = info->fattr; |
| 1159 | unsigned char * p; |
| 1160 | struct qstr q; |
| 1161 | struct nfs4_lookup_arg args = { |
| 1162 | .dir_fh = fhandle, |
| 1163 | .name = &q, |
| 1164 | .bitmask = nfs4_fattr_bitmap, |
| 1165 | }; |
| 1166 | struct nfs4_lookup_res res = { |
| 1167 | .server = server, |
| 1168 | .fattr = fattr, |
| 1169 | .fh = fhandle, |
| 1170 | }; |
| 1171 | struct rpc_message msg = { |
| 1172 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| 1173 | .rpc_argp = &args, |
| 1174 | .rpc_resp = &res, |
| 1175 | }; |
| 1176 | int status; |
| 1177 | |
| 1178 | /* |
| 1179 | * Now we do a separate LOOKUP for each component of the mount path. |
| 1180 | * The LOOKUPs are done separately so that we can conveniently |
| 1181 | * catch an ERR_WRONGSEC if it occurs along the way... |
| 1182 | */ |
| 1183 | status = nfs4_lookup_root(server, fhandle, info); |
| 1184 | if (status) |
| 1185 | goto out; |
| 1186 | |
| 1187 | p = server->mnt_path; |
| 1188 | for (;;) { |
| 1189 | struct nfs4_exception exception = { }; |
| 1190 | |
| 1191 | while (*p == '/') |
| 1192 | p++; |
| 1193 | if (!*p) |
| 1194 | break; |
| 1195 | q.name = p; |
| 1196 | while (*p && (*p != '/')) |
| 1197 | p++; |
| 1198 | q.len = p - q.name; |
| 1199 | |
| 1200 | do { |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1201 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | status = nfs4_handle_exception(server, |
| 1203 | rpc_call_sync(server->client, &msg, 0), |
| 1204 | &exception); |
| 1205 | } while (exception.retry); |
| 1206 | if (status == 0) |
| 1207 | continue; |
| 1208 | if (status == -ENOENT) { |
| 1209 | printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path); |
| 1210 | printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n"); |
| 1211 | } |
| 1212 | break; |
| 1213 | } |
| 1214 | if (status == 0) |
| 1215 | status = nfs4_server_capabilities(server, fhandle); |
| 1216 | if (status == 0) |
| 1217 | status = nfs4_do_fsinfo(server, fhandle, info); |
| 1218 | out: |
| 1219 | return status; |
| 1220 | } |
| 1221 | |
| 1222 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 1223 | { |
| 1224 | struct nfs4_getattr_arg args = { |
| 1225 | .fh = fhandle, |
| 1226 | .bitmask = server->attr_bitmask, |
| 1227 | }; |
| 1228 | struct nfs4_getattr_res res = { |
| 1229 | .fattr = fattr, |
| 1230 | .server = server, |
| 1231 | }; |
| 1232 | struct rpc_message msg = { |
| 1233 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
| 1234 | .rpc_argp = &args, |
| 1235 | .rpc_resp = &res, |
| 1236 | }; |
| 1237 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1238 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | return rpc_call_sync(server->client, &msg, 0); |
| 1240 | } |
| 1241 | |
| 1242 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 1243 | { |
| 1244 | struct nfs4_exception exception = { }; |
| 1245 | int err; |
| 1246 | do { |
| 1247 | err = nfs4_handle_exception(server, |
| 1248 | _nfs4_proc_getattr(server, fhandle, fattr), |
| 1249 | &exception); |
| 1250 | } while (exception.retry); |
| 1251 | return err; |
| 1252 | } |
| 1253 | |
| 1254 | /* |
| 1255 | * The file is not closed if it is opened due to the a request to change |
| 1256 | * the size of the file. The open call will not be needed once the |
| 1257 | * VFS layer lookup-intents are implemented. |
| 1258 | * |
| 1259 | * Close is called when the inode is destroyed. |
| 1260 | * If we haven't opened the file for O_WRONLY, we |
| 1261 | * need to in the size_change case to obtain a stateid. |
| 1262 | * |
| 1263 | * Got race? |
| 1264 | * Because OPEN is always done by name in nfsv4, it is |
| 1265 | * possible that we opened a different file by the same |
| 1266 | * name. We can recognize this race condition, but we |
| 1267 | * can't do anything about it besides returning an error. |
| 1268 | * |
| 1269 | * This will be fixed with VFS changes (lookup-intent). |
| 1270 | */ |
| 1271 | static int |
| 1272 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| 1273 | struct iattr *sattr) |
| 1274 | { |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1275 | struct rpc_cred *cred; |
| 1276 | struct inode *inode = dentry->d_inode; |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 1277 | struct nfs_open_context *ctx; |
| 1278 | struct nfs4_state *state = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | int status; |
| 1280 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1281 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1283 | cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); |
| 1284 | if (IS_ERR(cred)) |
| 1285 | return PTR_ERR(cred); |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 1286 | |
| 1287 | /* Search for an existing open(O_WRITE) file */ |
| 1288 | ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); |
| 1289 | if (ctx != NULL) |
| 1290 | state = ctx->state; |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | status = nfs4_do_setattr(NFS_SERVER(inode), fattr, |
| 1293 | NFS_FH(inode), sattr, state); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1294 | if (status == 0) |
| 1295 | nfs_setattr_update_inode(inode, sattr); |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 1296 | if (ctx != NULL) |
| 1297 | put_nfs_open_context(ctx); |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1298 | put_rpccred(cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | return status; |
| 1300 | } |
| 1301 | |
| 1302 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, |
| 1303 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 1304 | { |
| 1305 | int status; |
| 1306 | struct nfs_server *server = NFS_SERVER(dir); |
| 1307 | struct nfs4_lookup_arg args = { |
| 1308 | .bitmask = server->attr_bitmask, |
| 1309 | .dir_fh = NFS_FH(dir), |
| 1310 | .name = name, |
| 1311 | }; |
| 1312 | struct nfs4_lookup_res res = { |
| 1313 | .server = server, |
| 1314 | .fattr = fattr, |
| 1315 | .fh = fhandle, |
| 1316 | }; |
| 1317 | struct rpc_message msg = { |
| 1318 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| 1319 | .rpc_argp = &args, |
| 1320 | .rpc_resp = &res, |
| 1321 | }; |
| 1322 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1323 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | |
| 1325 | dprintk("NFS call lookup %s\n", name->name); |
| 1326 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 1327 | dprintk("NFS reply lookup: %d\n", status); |
| 1328 | return status; |
| 1329 | } |
| 1330 | |
| 1331 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 1332 | { |
| 1333 | struct nfs4_exception exception = { }; |
| 1334 | int err; |
| 1335 | do { |
| 1336 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 1337 | _nfs4_proc_lookup(dir, name, fhandle, fattr), |
| 1338 | &exception); |
| 1339 | } while (exception.retry); |
| 1340 | return err; |
| 1341 | } |
| 1342 | |
| 1343 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 1344 | { |
| 1345 | struct nfs4_accessargs args = { |
| 1346 | .fh = NFS_FH(inode), |
| 1347 | }; |
| 1348 | struct nfs4_accessres res = { 0 }; |
| 1349 | struct rpc_message msg = { |
| 1350 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], |
| 1351 | .rpc_argp = &args, |
| 1352 | .rpc_resp = &res, |
| 1353 | .rpc_cred = entry->cred, |
| 1354 | }; |
| 1355 | int mode = entry->mask; |
| 1356 | int status; |
| 1357 | |
| 1358 | /* |
| 1359 | * Determine which access bits we want to ask for... |
| 1360 | */ |
| 1361 | if (mode & MAY_READ) |
| 1362 | args.access |= NFS4_ACCESS_READ; |
| 1363 | if (S_ISDIR(inode->i_mode)) { |
| 1364 | if (mode & MAY_WRITE) |
| 1365 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; |
| 1366 | if (mode & MAY_EXEC) |
| 1367 | args.access |= NFS4_ACCESS_LOOKUP; |
| 1368 | } else { |
| 1369 | if (mode & MAY_WRITE) |
| 1370 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; |
| 1371 | if (mode & MAY_EXEC) |
| 1372 | args.access |= NFS4_ACCESS_EXECUTE; |
| 1373 | } |
| 1374 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 1375 | if (!status) { |
| 1376 | entry->mask = 0; |
| 1377 | if (res.access & NFS4_ACCESS_READ) |
| 1378 | entry->mask |= MAY_READ; |
| 1379 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) |
| 1380 | entry->mask |= MAY_WRITE; |
| 1381 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) |
| 1382 | entry->mask |= MAY_EXEC; |
| 1383 | } |
| 1384 | return status; |
| 1385 | } |
| 1386 | |
| 1387 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 1388 | { |
| 1389 | struct nfs4_exception exception = { }; |
| 1390 | int err; |
| 1391 | do { |
| 1392 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 1393 | _nfs4_proc_access(inode, entry), |
| 1394 | &exception); |
| 1395 | } while (exception.retry); |
| 1396 | return err; |
| 1397 | } |
| 1398 | |
| 1399 | /* |
| 1400 | * TODO: For the time being, we don't try to get any attributes |
| 1401 | * along with any of the zero-copy operations READ, READDIR, |
| 1402 | * READLINK, WRITE. |
| 1403 | * |
| 1404 | * In the case of the first three, we want to put the GETATTR |
| 1405 | * after the read-type operation -- this is because it is hard |
| 1406 | * to predict the length of a GETATTR response in v4, and thus |
| 1407 | * align the READ data correctly. This means that the GETATTR |
| 1408 | * may end up partially falling into the page cache, and we should |
| 1409 | * shift it into the 'tail' of the xdr_buf before processing. |
| 1410 | * To do this efficiently, we need to know the total length |
| 1411 | * of data received, which doesn't seem to be available outside |
| 1412 | * of the RPC layer. |
| 1413 | * |
| 1414 | * In the case of WRITE, we also want to put the GETATTR after |
| 1415 | * the operation -- in this case because we want to make sure |
| 1416 | * we get the post-operation mtime and size. This means that |
| 1417 | * we can't use xdr_encode_pages() as written: we need a variant |
| 1418 | * of it which would leave room in the 'tail' iovec. |
| 1419 | * |
| 1420 | * Both of these changes to the XDR layer would in fact be quite |
| 1421 | * minor, but I decided to leave them for a subsequent patch. |
| 1422 | */ |
| 1423 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, |
| 1424 | unsigned int pgbase, unsigned int pglen) |
| 1425 | { |
| 1426 | struct nfs4_readlink args = { |
| 1427 | .fh = NFS_FH(inode), |
| 1428 | .pgbase = pgbase, |
| 1429 | .pglen = pglen, |
| 1430 | .pages = &page, |
| 1431 | }; |
| 1432 | struct rpc_message msg = { |
| 1433 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], |
| 1434 | .rpc_argp = &args, |
| 1435 | .rpc_resp = NULL, |
| 1436 | }; |
| 1437 | |
| 1438 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 1439 | } |
| 1440 | |
| 1441 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, |
| 1442 | unsigned int pgbase, unsigned int pglen) |
| 1443 | { |
| 1444 | struct nfs4_exception exception = { }; |
| 1445 | int err; |
| 1446 | do { |
| 1447 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 1448 | _nfs4_proc_readlink(inode, page, pgbase, pglen), |
| 1449 | &exception); |
| 1450 | } while (exception.retry); |
| 1451 | return err; |
| 1452 | } |
| 1453 | |
| 1454 | static int _nfs4_proc_read(struct nfs_read_data *rdata) |
| 1455 | { |
| 1456 | int flags = rdata->flags; |
| 1457 | struct inode *inode = rdata->inode; |
| 1458 | struct nfs_fattr *fattr = rdata->res.fattr; |
| 1459 | struct nfs_server *server = NFS_SERVER(inode); |
| 1460 | struct rpc_message msg = { |
| 1461 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], |
| 1462 | .rpc_argp = &rdata->args, |
| 1463 | .rpc_resp = &rdata->res, |
| 1464 | .rpc_cred = rdata->cred, |
| 1465 | }; |
| 1466 | unsigned long timestamp = jiffies; |
| 1467 | int status; |
| 1468 | |
| 1469 | dprintk("NFS call read %d @ %Ld\n", rdata->args.count, |
| 1470 | (long long) rdata->args.offset); |
| 1471 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1472 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | status = rpc_call_sync(server->client, &msg, flags); |
| 1474 | if (!status) |
| 1475 | renew_lease(server, timestamp); |
| 1476 | dprintk("NFS reply read: %d\n", status); |
| 1477 | return status; |
| 1478 | } |
| 1479 | |
| 1480 | static int nfs4_proc_read(struct nfs_read_data *rdata) |
| 1481 | { |
| 1482 | struct nfs4_exception exception = { }; |
| 1483 | int err; |
| 1484 | do { |
| 1485 | err = nfs4_handle_exception(NFS_SERVER(rdata->inode), |
| 1486 | _nfs4_proc_read(rdata), |
| 1487 | &exception); |
| 1488 | } while (exception.retry); |
| 1489 | return err; |
| 1490 | } |
| 1491 | |
| 1492 | static int _nfs4_proc_write(struct nfs_write_data *wdata) |
| 1493 | { |
| 1494 | int rpcflags = wdata->flags; |
| 1495 | struct inode *inode = wdata->inode; |
| 1496 | struct nfs_fattr *fattr = wdata->res.fattr; |
| 1497 | struct nfs_server *server = NFS_SERVER(inode); |
| 1498 | struct rpc_message msg = { |
| 1499 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], |
| 1500 | .rpc_argp = &wdata->args, |
| 1501 | .rpc_resp = &wdata->res, |
| 1502 | .rpc_cred = wdata->cred, |
| 1503 | }; |
| 1504 | int status; |
| 1505 | |
| 1506 | dprintk("NFS call write %d @ %Ld\n", wdata->args.count, |
| 1507 | (long long) wdata->args.offset); |
| 1508 | |
Trond Myklebust | 3b6efee | 2005-12-03 15:20:21 -0500 | [diff] [blame] | 1509 | wdata->args.bitmask = server->attr_bitmask; |
| 1510 | wdata->res.server = server; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1511 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | status = rpc_call_sync(server->client, &msg, rpcflags); |
| 1513 | dprintk("NFS reply write: %d\n", status); |
Trond Myklebust | 3b6efee | 2005-12-03 15:20:21 -0500 | [diff] [blame] | 1514 | if (status < 0) |
| 1515 | return status; |
| 1516 | nfs_post_op_update_inode(inode, fattr); |
| 1517 | return wdata->res.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | } |
| 1519 | |
| 1520 | static int nfs4_proc_write(struct nfs_write_data *wdata) |
| 1521 | { |
| 1522 | struct nfs4_exception exception = { }; |
| 1523 | int err; |
| 1524 | do { |
| 1525 | err = nfs4_handle_exception(NFS_SERVER(wdata->inode), |
| 1526 | _nfs4_proc_write(wdata), |
| 1527 | &exception); |
| 1528 | } while (exception.retry); |
| 1529 | return err; |
| 1530 | } |
| 1531 | |
| 1532 | static int _nfs4_proc_commit(struct nfs_write_data *cdata) |
| 1533 | { |
| 1534 | struct inode *inode = cdata->inode; |
| 1535 | struct nfs_fattr *fattr = cdata->res.fattr; |
| 1536 | struct nfs_server *server = NFS_SERVER(inode); |
| 1537 | struct rpc_message msg = { |
| 1538 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], |
| 1539 | .rpc_argp = &cdata->args, |
| 1540 | .rpc_resp = &cdata->res, |
| 1541 | .rpc_cred = cdata->cred, |
| 1542 | }; |
| 1543 | int status; |
| 1544 | |
| 1545 | dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, |
| 1546 | (long long) cdata->args.offset); |
| 1547 | |
Trond Myklebust | 3b6efee | 2005-12-03 15:20:21 -0500 | [diff] [blame] | 1548 | cdata->args.bitmask = server->attr_bitmask; |
| 1549 | cdata->res.server = server; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1550 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | status = rpc_call_sync(server->client, &msg, 0); |
| 1552 | dprintk("NFS reply commit: %d\n", status); |
Trond Myklebust | 3b6efee | 2005-12-03 15:20:21 -0500 | [diff] [blame] | 1553 | if (status >= 0) |
| 1554 | nfs_post_op_update_inode(inode, fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | return status; |
| 1556 | } |
| 1557 | |
| 1558 | static int nfs4_proc_commit(struct nfs_write_data *cdata) |
| 1559 | { |
| 1560 | struct nfs4_exception exception = { }; |
| 1561 | int err; |
| 1562 | do { |
| 1563 | err = nfs4_handle_exception(NFS_SERVER(cdata->inode), |
| 1564 | _nfs4_proc_commit(cdata), |
| 1565 | &exception); |
| 1566 | } while (exception.retry); |
| 1567 | return err; |
| 1568 | } |
| 1569 | |
| 1570 | /* |
| 1571 | * Got race? |
| 1572 | * We will need to arrange for the VFS layer to provide an atomic open. |
| 1573 | * Until then, this create/open method is prone to inefficiency and race |
| 1574 | * conditions due to the lookup, create, and open VFS calls from sys_open() |
| 1575 | * placed on the wire. |
| 1576 | * |
| 1577 | * Given the above sorry state of affairs, I'm simply sending an OPEN. |
| 1578 | * The file will be opened again in the subsequent VFS open call |
| 1579 | * (nfs4_proc_file_open). |
| 1580 | * |
| 1581 | * The open for read will just hang around to be used by any process that |
| 1582 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. |
| 1583 | */ |
| 1584 | |
| 1585 | static int |
| 1586 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1587 | int flags, struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | { |
| 1589 | struct nfs4_state *state; |
| 1590 | struct rpc_cred *cred; |
| 1591 | int status = 0; |
| 1592 | |
| 1593 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); |
| 1594 | if (IS_ERR(cred)) { |
| 1595 | status = PTR_ERR(cred); |
| 1596 | goto out; |
| 1597 | } |
| 1598 | state = nfs4_do_open(dir, dentry, flags, sattr, cred); |
| 1599 | put_rpccred(cred); |
| 1600 | if (IS_ERR(state)) { |
| 1601 | status = PTR_ERR(state); |
| 1602 | goto out; |
| 1603 | } |
| 1604 | d_instantiate(dentry, state->inode); |
| 1605 | if (flags & O_EXCL) { |
| 1606 | struct nfs_fattr fattr; |
| 1607 | status = nfs4_do_setattr(NFS_SERVER(dir), &fattr, |
| 1608 | NFS_FH(state->inode), sattr, state); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1609 | if (status == 0) |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1610 | nfs_setattr_update_inode(state->inode, sattr); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1611 | } |
| 1612 | if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN)) |
| 1613 | nfs4_intent_set_file(nd, dentry, state); |
| 1614 | else |
| 1615 | nfs4_close_state(state, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | out: |
| 1617 | return status; |
| 1618 | } |
| 1619 | |
| 1620 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| 1621 | { |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1622 | struct nfs_server *server = NFS_SERVER(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | struct nfs4_remove_arg args = { |
| 1624 | .fh = NFS_FH(dir), |
| 1625 | .name = name, |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1626 | .bitmask = server->attr_bitmask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | }; |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1628 | struct nfs_fattr dir_attr; |
| 1629 | struct nfs4_remove_res res = { |
| 1630 | .server = server, |
| 1631 | .dir_attr = &dir_attr, |
| 1632 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | struct rpc_message msg = { |
| 1634 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
| 1635 | .rpc_argp = &args, |
| 1636 | .rpc_resp = &res, |
| 1637 | }; |
| 1638 | int status; |
| 1639 | |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1640 | nfs_fattr_init(res.dir_attr); |
| 1641 | status = rpc_call_sync(server->client, &msg, 0); |
| 1642 | if (status == 0) { |
| 1643 | update_changeattr(dir, &res.cinfo); |
| 1644 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 1645 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | return status; |
| 1647 | } |
| 1648 | |
| 1649 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| 1650 | { |
| 1651 | struct nfs4_exception exception = { }; |
| 1652 | int err; |
| 1653 | do { |
| 1654 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 1655 | _nfs4_proc_remove(dir, name), |
| 1656 | &exception); |
| 1657 | } while (exception.retry); |
| 1658 | return err; |
| 1659 | } |
| 1660 | |
| 1661 | struct unlink_desc { |
| 1662 | struct nfs4_remove_arg args; |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1663 | struct nfs4_remove_res res; |
| 1664 | struct nfs_fattr dir_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | }; |
| 1666 | |
| 1667 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, |
| 1668 | struct qstr *name) |
| 1669 | { |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1670 | struct nfs_server *server = NFS_SERVER(dir->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | struct unlink_desc *up; |
| 1672 | |
| 1673 | up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); |
| 1674 | if (!up) |
| 1675 | return -ENOMEM; |
| 1676 | |
| 1677 | up->args.fh = NFS_FH(dir->d_inode); |
| 1678 | up->args.name = name; |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1679 | up->args.bitmask = server->attr_bitmask; |
| 1680 | up->res.server = server; |
| 1681 | up->res.dir_attr = &up->dir_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | |
| 1683 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
| 1684 | msg->rpc_argp = &up->args; |
| 1685 | msg->rpc_resp = &up->res; |
| 1686 | return 0; |
| 1687 | } |
| 1688 | |
| 1689 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) |
| 1690 | { |
| 1691 | struct rpc_message *msg = &task->tk_msg; |
| 1692 | struct unlink_desc *up; |
| 1693 | |
| 1694 | if (msg->rpc_resp != NULL) { |
| 1695 | up = container_of(msg->rpc_resp, struct unlink_desc, res); |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1696 | update_changeattr(dir->d_inode, &up->res.cinfo); |
| 1697 | nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | kfree(up); |
| 1699 | msg->rpc_resp = NULL; |
| 1700 | msg->rpc_argp = NULL; |
| 1701 | } |
| 1702 | return 0; |
| 1703 | } |
| 1704 | |
| 1705 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 1706 | struct inode *new_dir, struct qstr *new_name) |
| 1707 | { |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1708 | struct nfs_server *server = NFS_SERVER(old_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | struct nfs4_rename_arg arg = { |
| 1710 | .old_dir = NFS_FH(old_dir), |
| 1711 | .new_dir = NFS_FH(new_dir), |
| 1712 | .old_name = old_name, |
| 1713 | .new_name = new_name, |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1714 | .bitmask = server->attr_bitmask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | }; |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1716 | struct nfs_fattr old_fattr, new_fattr; |
| 1717 | struct nfs4_rename_res res = { |
| 1718 | .server = server, |
| 1719 | .old_fattr = &old_fattr, |
| 1720 | .new_fattr = &new_fattr, |
| 1721 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | struct rpc_message msg = { |
| 1723 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], |
| 1724 | .rpc_argp = &arg, |
| 1725 | .rpc_resp = &res, |
| 1726 | }; |
| 1727 | int status; |
| 1728 | |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1729 | nfs_fattr_init(res.old_fattr); |
| 1730 | nfs_fattr_init(res.new_fattr); |
| 1731 | status = rpc_call_sync(server->client, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | |
| 1733 | if (!status) { |
| 1734 | update_changeattr(old_dir, &res.old_cinfo); |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1735 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | update_changeattr(new_dir, &res.new_cinfo); |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1737 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | } |
| 1739 | return status; |
| 1740 | } |
| 1741 | |
| 1742 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 1743 | struct inode *new_dir, struct qstr *new_name) |
| 1744 | { |
| 1745 | struct nfs4_exception exception = { }; |
| 1746 | int err; |
| 1747 | do { |
| 1748 | err = nfs4_handle_exception(NFS_SERVER(old_dir), |
| 1749 | _nfs4_proc_rename(old_dir, old_name, |
| 1750 | new_dir, new_name), |
| 1751 | &exception); |
| 1752 | } while (exception.retry); |
| 1753 | return err; |
| 1754 | } |
| 1755 | |
| 1756 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 1757 | { |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1758 | struct nfs_server *server = NFS_SERVER(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1759 | struct nfs4_link_arg arg = { |
| 1760 | .fh = NFS_FH(inode), |
| 1761 | .dir_fh = NFS_FH(dir), |
| 1762 | .name = name, |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1763 | .bitmask = server->attr_bitmask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | }; |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1765 | struct nfs_fattr fattr, dir_attr; |
| 1766 | struct nfs4_link_res res = { |
| 1767 | .server = server, |
| 1768 | .fattr = &fattr, |
| 1769 | .dir_attr = &dir_attr, |
| 1770 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | struct rpc_message msg = { |
| 1772 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], |
| 1773 | .rpc_argp = &arg, |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1774 | .rpc_resp = &res, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | }; |
| 1776 | int status; |
| 1777 | |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1778 | nfs_fattr_init(res.fattr); |
| 1779 | nfs_fattr_init(res.dir_attr); |
| 1780 | status = rpc_call_sync(server->client, &msg, 0); |
| 1781 | if (!status) { |
| 1782 | update_changeattr(dir, &res.cinfo); |
| 1783 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 1784 | nfs_refresh_inode(inode, res.fattr); |
| 1785 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | |
| 1787 | return status; |
| 1788 | } |
| 1789 | |
| 1790 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 1791 | { |
| 1792 | struct nfs4_exception exception = { }; |
| 1793 | int err; |
| 1794 | do { |
| 1795 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 1796 | _nfs4_proc_link(inode, dir, name), |
| 1797 | &exception); |
| 1798 | } while (exception.retry); |
| 1799 | return err; |
| 1800 | } |
| 1801 | |
| 1802 | static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, |
| 1803 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, |
| 1804 | struct nfs_fattr *fattr) |
| 1805 | { |
| 1806 | struct nfs_server *server = NFS_SERVER(dir); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1807 | struct nfs_fattr dir_fattr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | struct nfs4_create_arg arg = { |
| 1809 | .dir_fh = NFS_FH(dir), |
| 1810 | .server = server, |
| 1811 | .name = name, |
| 1812 | .attrs = sattr, |
| 1813 | .ftype = NF4LNK, |
| 1814 | .bitmask = server->attr_bitmask, |
| 1815 | }; |
| 1816 | struct nfs4_create_res res = { |
| 1817 | .server = server, |
| 1818 | .fh = fhandle, |
| 1819 | .fattr = fattr, |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1820 | .dir_fattr = &dir_fattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | }; |
| 1822 | struct rpc_message msg = { |
| 1823 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], |
| 1824 | .rpc_argp = &arg, |
| 1825 | .rpc_resp = &res, |
| 1826 | }; |
| 1827 | int status; |
| 1828 | |
| 1829 | if (path->len > NFS4_MAXPATHLEN) |
| 1830 | return -ENAMETOOLONG; |
| 1831 | arg.u.symlink = path; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1832 | nfs_fattr_init(fattr); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1833 | nfs_fattr_init(&dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | |
| 1835 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 1836 | if (!status) |
| 1837 | update_changeattr(dir, &res.dir_cinfo); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1838 | nfs_post_op_update_inode(dir, res.dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | return status; |
| 1840 | } |
| 1841 | |
| 1842 | static int nfs4_proc_symlink(struct inode *dir, struct qstr *name, |
| 1843 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, |
| 1844 | struct nfs_fattr *fattr) |
| 1845 | { |
| 1846 | struct nfs4_exception exception = { }; |
| 1847 | int err; |
| 1848 | do { |
| 1849 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 1850 | _nfs4_proc_symlink(dir, name, path, sattr, |
| 1851 | fhandle, fattr), |
| 1852 | &exception); |
| 1853 | } while (exception.retry); |
| 1854 | return err; |
| 1855 | } |
| 1856 | |
| 1857 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| 1858 | struct iattr *sattr) |
| 1859 | { |
| 1860 | struct nfs_server *server = NFS_SERVER(dir); |
| 1861 | struct nfs_fh fhandle; |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1862 | struct nfs_fattr fattr, dir_fattr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | struct nfs4_create_arg arg = { |
| 1864 | .dir_fh = NFS_FH(dir), |
| 1865 | .server = server, |
| 1866 | .name = &dentry->d_name, |
| 1867 | .attrs = sattr, |
| 1868 | .ftype = NF4DIR, |
| 1869 | .bitmask = server->attr_bitmask, |
| 1870 | }; |
| 1871 | struct nfs4_create_res res = { |
| 1872 | .server = server, |
| 1873 | .fh = &fhandle, |
| 1874 | .fattr = &fattr, |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1875 | .dir_fattr = &dir_fattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | }; |
| 1877 | struct rpc_message msg = { |
| 1878 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], |
| 1879 | .rpc_argp = &arg, |
| 1880 | .rpc_resp = &res, |
| 1881 | }; |
| 1882 | int status; |
| 1883 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1884 | nfs_fattr_init(&fattr); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1885 | nfs_fattr_init(&dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | |
| 1887 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 1888 | if (!status) { |
| 1889 | update_changeattr(dir, &res.dir_cinfo); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1890 | nfs_post_op_update_inode(dir, res.dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 1892 | } |
| 1893 | return status; |
| 1894 | } |
| 1895 | |
| 1896 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| 1897 | struct iattr *sattr) |
| 1898 | { |
| 1899 | struct nfs4_exception exception = { }; |
| 1900 | int err; |
| 1901 | do { |
| 1902 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 1903 | _nfs4_proc_mkdir(dir, dentry, sattr), |
| 1904 | &exception); |
| 1905 | } while (exception.retry); |
| 1906 | return err; |
| 1907 | } |
| 1908 | |
| 1909 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 1910 | u64 cookie, struct page *page, unsigned int count, int plus) |
| 1911 | { |
| 1912 | struct inode *dir = dentry->d_inode; |
| 1913 | struct nfs4_readdir_arg args = { |
| 1914 | .fh = NFS_FH(dir), |
| 1915 | .pages = &page, |
| 1916 | .pgbase = 0, |
| 1917 | .count = count, |
| 1918 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
| 1919 | }; |
| 1920 | struct nfs4_readdir_res res; |
| 1921 | struct rpc_message msg = { |
| 1922 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], |
| 1923 | .rpc_argp = &args, |
| 1924 | .rpc_resp = &res, |
| 1925 | .rpc_cred = cred, |
| 1926 | }; |
| 1927 | int status; |
| 1928 | |
Trond Myklebust | eadf459 | 2005-06-22 17:16:39 +0000 | [diff] [blame] | 1929 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, |
| 1930 | dentry->d_parent->d_name.name, |
| 1931 | dentry->d_name.name, |
| 1932 | (unsigned long long)cookie); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | lock_kernel(); |
| 1934 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
| 1935 | res.pgbase = args.pgbase; |
| 1936 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 1937 | if (status == 0) |
| 1938 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); |
| 1939 | unlock_kernel(); |
Trond Myklebust | eadf459 | 2005-06-22 17:16:39 +0000 | [diff] [blame] | 1940 | dprintk("%s: returns %d\n", __FUNCTION__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | return status; |
| 1942 | } |
| 1943 | |
| 1944 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 1945 | u64 cookie, struct page *page, unsigned int count, int plus) |
| 1946 | { |
| 1947 | struct nfs4_exception exception = { }; |
| 1948 | int err; |
| 1949 | do { |
| 1950 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), |
| 1951 | _nfs4_proc_readdir(dentry, cred, cookie, |
| 1952 | page, count, plus), |
| 1953 | &exception); |
| 1954 | } while (exception.retry); |
| 1955 | return err; |
| 1956 | } |
| 1957 | |
| 1958 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| 1959 | struct iattr *sattr, dev_t rdev) |
| 1960 | { |
| 1961 | struct nfs_server *server = NFS_SERVER(dir); |
| 1962 | struct nfs_fh fh; |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1963 | struct nfs_fattr fattr, dir_fattr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | struct nfs4_create_arg arg = { |
| 1965 | .dir_fh = NFS_FH(dir), |
| 1966 | .server = server, |
| 1967 | .name = &dentry->d_name, |
| 1968 | .attrs = sattr, |
| 1969 | .bitmask = server->attr_bitmask, |
| 1970 | }; |
| 1971 | struct nfs4_create_res res = { |
| 1972 | .server = server, |
| 1973 | .fh = &fh, |
| 1974 | .fattr = &fattr, |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1975 | .dir_fattr = &dir_fattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | }; |
| 1977 | struct rpc_message msg = { |
| 1978 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], |
| 1979 | .rpc_argp = &arg, |
| 1980 | .rpc_resp = &res, |
| 1981 | }; |
| 1982 | int status; |
| 1983 | int mode = sattr->ia_mode; |
| 1984 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1985 | nfs_fattr_init(&fattr); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 1986 | nfs_fattr_init(&dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | |
| 1988 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); |
| 1989 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); |
| 1990 | if (S_ISFIFO(mode)) |
| 1991 | arg.ftype = NF4FIFO; |
| 1992 | else if (S_ISBLK(mode)) { |
| 1993 | arg.ftype = NF4BLK; |
| 1994 | arg.u.device.specdata1 = MAJOR(rdev); |
| 1995 | arg.u.device.specdata2 = MINOR(rdev); |
| 1996 | } |
| 1997 | else if (S_ISCHR(mode)) { |
| 1998 | arg.ftype = NF4CHR; |
| 1999 | arg.u.device.specdata1 = MAJOR(rdev); |
| 2000 | arg.u.device.specdata2 = MINOR(rdev); |
| 2001 | } |
| 2002 | else |
| 2003 | arg.ftype = NF4SOCK; |
| 2004 | |
| 2005 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 2006 | if (status == 0) { |
| 2007 | update_changeattr(dir, &res.dir_cinfo); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2008 | nfs_post_op_update_inode(dir, res.dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | status = nfs_instantiate(dentry, &fh, &fattr); |
| 2010 | } |
| 2011 | return status; |
| 2012 | } |
| 2013 | |
| 2014 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| 2015 | struct iattr *sattr, dev_t rdev) |
| 2016 | { |
| 2017 | struct nfs4_exception exception = { }; |
| 2018 | int err; |
| 2019 | do { |
| 2020 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2021 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), |
| 2022 | &exception); |
| 2023 | } while (exception.retry); |
| 2024 | return err; |
| 2025 | } |
| 2026 | |
| 2027 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2028 | struct nfs_fsstat *fsstat) |
| 2029 | { |
| 2030 | struct nfs4_statfs_arg args = { |
| 2031 | .fh = fhandle, |
| 2032 | .bitmask = server->attr_bitmask, |
| 2033 | }; |
| 2034 | struct rpc_message msg = { |
| 2035 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], |
| 2036 | .rpc_argp = &args, |
| 2037 | .rpc_resp = fsstat, |
| 2038 | }; |
| 2039 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 2040 | nfs_fattr_init(fsstat->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | return rpc_call_sync(server->client, &msg, 0); |
| 2042 | } |
| 2043 | |
| 2044 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) |
| 2045 | { |
| 2046 | struct nfs4_exception exception = { }; |
| 2047 | int err; |
| 2048 | do { |
| 2049 | err = nfs4_handle_exception(server, |
| 2050 | _nfs4_proc_statfs(server, fhandle, fsstat), |
| 2051 | &exception); |
| 2052 | } while (exception.retry); |
| 2053 | return err; |
| 2054 | } |
| 2055 | |
| 2056 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2057 | struct nfs_fsinfo *fsinfo) |
| 2058 | { |
| 2059 | struct nfs4_fsinfo_arg args = { |
| 2060 | .fh = fhandle, |
| 2061 | .bitmask = server->attr_bitmask, |
| 2062 | }; |
| 2063 | struct rpc_message msg = { |
| 2064 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], |
| 2065 | .rpc_argp = &args, |
| 2066 | .rpc_resp = fsinfo, |
| 2067 | }; |
| 2068 | |
| 2069 | return rpc_call_sync(server->client, &msg, 0); |
| 2070 | } |
| 2071 | |
| 2072 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| 2073 | { |
| 2074 | struct nfs4_exception exception = { }; |
| 2075 | int err; |
| 2076 | |
| 2077 | do { |
| 2078 | err = nfs4_handle_exception(server, |
| 2079 | _nfs4_do_fsinfo(server, fhandle, fsinfo), |
| 2080 | &exception); |
| 2081 | } while (exception.retry); |
| 2082 | return err; |
| 2083 | } |
| 2084 | |
| 2085 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| 2086 | { |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 2087 | nfs_fattr_init(fsinfo->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
| 2089 | } |
| 2090 | |
| 2091 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2092 | struct nfs_pathconf *pathconf) |
| 2093 | { |
| 2094 | struct nfs4_pathconf_arg args = { |
| 2095 | .fh = fhandle, |
| 2096 | .bitmask = server->attr_bitmask, |
| 2097 | }; |
| 2098 | struct rpc_message msg = { |
| 2099 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], |
| 2100 | .rpc_argp = &args, |
| 2101 | .rpc_resp = pathconf, |
| 2102 | }; |
| 2103 | |
| 2104 | /* None of the pathconf attributes are mandatory to implement */ |
| 2105 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { |
| 2106 | memset(pathconf, 0, sizeof(*pathconf)); |
| 2107 | return 0; |
| 2108 | } |
| 2109 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 2110 | nfs_fattr_init(pathconf->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | return rpc_call_sync(server->client, &msg, 0); |
| 2112 | } |
| 2113 | |
| 2114 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2115 | struct nfs_pathconf *pathconf) |
| 2116 | { |
| 2117 | struct nfs4_exception exception = { }; |
| 2118 | int err; |
| 2119 | |
| 2120 | do { |
| 2121 | err = nfs4_handle_exception(server, |
| 2122 | _nfs4_proc_pathconf(server, fhandle, pathconf), |
| 2123 | &exception); |
| 2124 | } while (exception.retry); |
| 2125 | return err; |
| 2126 | } |
| 2127 | |
| 2128 | static void |
| 2129 | nfs4_read_done(struct rpc_task *task) |
| 2130 | { |
| 2131 | struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata; |
| 2132 | struct inode *inode = data->inode; |
| 2133 | |
| 2134 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { |
| 2135 | rpc_restart_call(task); |
| 2136 | return; |
| 2137 | } |
| 2138 | if (task->tk_status > 0) |
| 2139 | renew_lease(NFS_SERVER(inode), data->timestamp); |
| 2140 | /* Call back common NFS readpage processing */ |
| 2141 | nfs_readpage_result(task); |
| 2142 | } |
| 2143 | |
| 2144 | static void |
| 2145 | nfs4_proc_read_setup(struct nfs_read_data *data) |
| 2146 | { |
| 2147 | struct rpc_task *task = &data->task; |
| 2148 | struct rpc_message msg = { |
| 2149 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], |
| 2150 | .rpc_argp = &data->args, |
| 2151 | .rpc_resp = &data->res, |
| 2152 | .rpc_cred = data->cred, |
| 2153 | }; |
| 2154 | struct inode *inode = data->inode; |
| 2155 | int flags; |
| 2156 | |
| 2157 | data->timestamp = jiffies; |
| 2158 | |
| 2159 | /* N.B. Do we need to test? Never called for swapfile inode */ |
| 2160 | flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); |
| 2161 | |
| 2162 | /* Finalize the task. */ |
| 2163 | rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags); |
| 2164 | rpc_call_setup(task, &msg, 0); |
| 2165 | } |
| 2166 | |
| 2167 | static void |
| 2168 | nfs4_write_done(struct rpc_task *task) |
| 2169 | { |
| 2170 | struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; |
| 2171 | struct inode *inode = data->inode; |
| 2172 | |
| 2173 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { |
| 2174 | rpc_restart_call(task); |
| 2175 | return; |
| 2176 | } |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2177 | if (task->tk_status >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | renew_lease(NFS_SERVER(inode), data->timestamp); |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2179 | nfs_post_op_update_inode(inode, data->res.fattr); |
| 2180 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | /* Call back common NFS writeback processing */ |
| 2182 | nfs_writeback_done(task); |
| 2183 | } |
| 2184 | |
| 2185 | static void |
| 2186 | nfs4_proc_write_setup(struct nfs_write_data *data, int how) |
| 2187 | { |
| 2188 | struct rpc_task *task = &data->task; |
| 2189 | struct rpc_message msg = { |
| 2190 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], |
| 2191 | .rpc_argp = &data->args, |
| 2192 | .rpc_resp = &data->res, |
| 2193 | .rpc_cred = data->cred, |
| 2194 | }; |
| 2195 | struct inode *inode = data->inode; |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2196 | struct nfs_server *server = NFS_SERVER(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | int stable; |
| 2198 | int flags; |
| 2199 | |
| 2200 | if (how & FLUSH_STABLE) { |
| 2201 | if (!NFS_I(inode)->ncommit) |
| 2202 | stable = NFS_FILE_SYNC; |
| 2203 | else |
| 2204 | stable = NFS_DATA_SYNC; |
| 2205 | } else |
| 2206 | stable = NFS_UNSTABLE; |
| 2207 | data->args.stable = stable; |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2208 | data->args.bitmask = server->attr_bitmask; |
| 2209 | data->res.server = server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | |
| 2211 | data->timestamp = jiffies; |
| 2212 | |
| 2213 | /* Set the initial flags for the task. */ |
| 2214 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; |
| 2215 | |
| 2216 | /* Finalize the task. */ |
| 2217 | rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags); |
| 2218 | rpc_call_setup(task, &msg, 0); |
| 2219 | } |
| 2220 | |
| 2221 | static void |
| 2222 | nfs4_commit_done(struct rpc_task *task) |
| 2223 | { |
| 2224 | struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; |
| 2225 | struct inode *inode = data->inode; |
| 2226 | |
| 2227 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { |
| 2228 | rpc_restart_call(task); |
| 2229 | return; |
| 2230 | } |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2231 | if (task->tk_status >= 0) |
| 2232 | nfs_post_op_update_inode(inode, data->res.fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | /* Call back common NFS writeback processing */ |
| 2234 | nfs_commit_done(task); |
| 2235 | } |
| 2236 | |
| 2237 | static void |
| 2238 | nfs4_proc_commit_setup(struct nfs_write_data *data, int how) |
| 2239 | { |
| 2240 | struct rpc_task *task = &data->task; |
| 2241 | struct rpc_message msg = { |
| 2242 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], |
| 2243 | .rpc_argp = &data->args, |
| 2244 | .rpc_resp = &data->res, |
| 2245 | .rpc_cred = data->cred, |
| 2246 | }; |
| 2247 | struct inode *inode = data->inode; |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2248 | struct nfs_server *server = NFS_SERVER(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | int flags; |
| 2250 | |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2251 | data->args.bitmask = server->attr_bitmask; |
| 2252 | data->res.server = server; |
| 2253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | /* Set the initial flags for the task. */ |
| 2255 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; |
| 2256 | |
| 2257 | /* Finalize the task. */ |
| 2258 | rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags); |
| 2259 | rpc_call_setup(task, &msg, 0); |
| 2260 | } |
| 2261 | |
| 2262 | /* |
| 2263 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special |
| 2264 | * standalone procedure for queueing an asynchronous RENEW. |
| 2265 | */ |
| 2266 | static void |
| 2267 | renew_done(struct rpc_task *task) |
| 2268 | { |
| 2269 | struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; |
| 2270 | unsigned long timestamp = (unsigned long)task->tk_calldata; |
| 2271 | |
| 2272 | if (task->tk_status < 0) { |
| 2273 | switch (task->tk_status) { |
| 2274 | case -NFS4ERR_STALE_CLIENTID: |
| 2275 | case -NFS4ERR_EXPIRED: |
| 2276 | case -NFS4ERR_CB_PATH_DOWN: |
| 2277 | nfs4_schedule_state_recovery(clp); |
| 2278 | } |
| 2279 | return; |
| 2280 | } |
| 2281 | spin_lock(&clp->cl_lock); |
| 2282 | if (time_before(clp->cl_last_renewal,timestamp)) |
| 2283 | clp->cl_last_renewal = timestamp; |
| 2284 | spin_unlock(&clp->cl_lock); |
| 2285 | } |
| 2286 | |
| 2287 | int |
| 2288 | nfs4_proc_async_renew(struct nfs4_client *clp) |
| 2289 | { |
| 2290 | struct rpc_message msg = { |
| 2291 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| 2292 | .rpc_argp = clp, |
| 2293 | .rpc_cred = clp->cl_cred, |
| 2294 | }; |
| 2295 | |
| 2296 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
| 2297 | renew_done, (void *)jiffies); |
| 2298 | } |
| 2299 | |
| 2300 | int |
| 2301 | nfs4_proc_renew(struct nfs4_client *clp) |
| 2302 | { |
| 2303 | struct rpc_message msg = { |
| 2304 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| 2305 | .rpc_argp = clp, |
| 2306 | .rpc_cred = clp->cl_cred, |
| 2307 | }; |
| 2308 | unsigned long now = jiffies; |
| 2309 | int status; |
| 2310 | |
| 2311 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 2312 | if (status < 0) |
| 2313 | return status; |
| 2314 | spin_lock(&clp->cl_lock); |
| 2315 | if (time_before(clp->cl_last_renewal,now)) |
| 2316 | clp->cl_last_renewal = now; |
| 2317 | spin_unlock(&clp->cl_lock); |
| 2318 | return 0; |
| 2319 | } |
| 2320 | |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2321 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
| 2322 | { |
| 2323 | return (server->caps & NFS_CAP_ACLS) |
| 2324 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) |
| 2325 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); |
| 2326 | } |
| 2327 | |
| 2328 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that |
| 2329 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on |
| 2330 | * the stack. |
| 2331 | */ |
| 2332 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) |
| 2333 | |
| 2334 | static void buf_to_pages(const void *buf, size_t buflen, |
| 2335 | struct page **pages, unsigned int *pgbase) |
| 2336 | { |
| 2337 | const void *p = buf; |
| 2338 | |
| 2339 | *pgbase = offset_in_page(buf); |
| 2340 | p -= *pgbase; |
| 2341 | while (p < buf + buflen) { |
| 2342 | *(pages++) = virt_to_page(p); |
| 2343 | p += PAGE_CACHE_SIZE; |
| 2344 | } |
| 2345 | } |
| 2346 | |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2347 | struct nfs4_cached_acl { |
| 2348 | int cached; |
| 2349 | size_t len; |
Andrew Morton | 3e9d415 | 2005-06-22 17:16:28 +0000 | [diff] [blame] | 2350 | char data[0]; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2351 | }; |
| 2352 | |
| 2353 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2354 | { |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2355 | struct nfs_inode *nfsi = NFS_I(inode); |
| 2356 | |
| 2357 | spin_lock(&inode->i_lock); |
| 2358 | kfree(nfsi->nfs4_acl); |
| 2359 | nfsi->nfs4_acl = acl; |
| 2360 | spin_unlock(&inode->i_lock); |
| 2361 | } |
| 2362 | |
| 2363 | static void nfs4_zap_acl_attr(struct inode *inode) |
| 2364 | { |
| 2365 | nfs4_set_cached_acl(inode, NULL); |
| 2366 | } |
| 2367 | |
| 2368 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) |
| 2369 | { |
| 2370 | struct nfs_inode *nfsi = NFS_I(inode); |
| 2371 | struct nfs4_cached_acl *acl; |
| 2372 | int ret = -ENOENT; |
| 2373 | |
| 2374 | spin_lock(&inode->i_lock); |
| 2375 | acl = nfsi->nfs4_acl; |
| 2376 | if (acl == NULL) |
| 2377 | goto out; |
| 2378 | if (buf == NULL) /* user is just asking for length */ |
| 2379 | goto out_len; |
| 2380 | if (acl->cached == 0) |
| 2381 | goto out; |
| 2382 | ret = -ERANGE; /* see getxattr(2) man page */ |
| 2383 | if (acl->len > buflen) |
| 2384 | goto out; |
| 2385 | memcpy(buf, acl->data, acl->len); |
| 2386 | out_len: |
| 2387 | ret = acl->len; |
| 2388 | out: |
| 2389 | spin_unlock(&inode->i_lock); |
| 2390 | return ret; |
| 2391 | } |
| 2392 | |
| 2393 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) |
| 2394 | { |
| 2395 | struct nfs4_cached_acl *acl; |
| 2396 | |
| 2397 | if (buf && acl_len <= PAGE_SIZE) { |
| 2398 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); |
| 2399 | if (acl == NULL) |
| 2400 | goto out; |
| 2401 | acl->cached = 1; |
| 2402 | memcpy(acl->data, buf, acl_len); |
| 2403 | } else { |
| 2404 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); |
| 2405 | if (acl == NULL) |
| 2406 | goto out; |
| 2407 | acl->cached = 0; |
| 2408 | } |
| 2409 | acl->len = acl_len; |
| 2410 | out: |
| 2411 | nfs4_set_cached_acl(inode, acl); |
| 2412 | } |
| 2413 | |
| 2414 | static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| 2415 | { |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2416 | struct page *pages[NFS4ACL_MAXPAGES]; |
| 2417 | struct nfs_getaclargs args = { |
| 2418 | .fh = NFS_FH(inode), |
| 2419 | .acl_pages = pages, |
| 2420 | .acl_len = buflen, |
| 2421 | }; |
| 2422 | size_t resp_len = buflen; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2423 | void *resp_buf; |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2424 | struct rpc_message msg = { |
| 2425 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], |
| 2426 | .rpc_argp = &args, |
| 2427 | .rpc_resp = &resp_len, |
| 2428 | }; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2429 | struct page *localpage = NULL; |
| 2430 | int ret; |
| 2431 | |
| 2432 | if (buflen < PAGE_SIZE) { |
| 2433 | /* As long as we're doing a round trip to the server anyway, |
| 2434 | * let's be prepared for a page of acl data. */ |
| 2435 | localpage = alloc_page(GFP_KERNEL); |
| 2436 | resp_buf = page_address(localpage); |
| 2437 | if (localpage == NULL) |
| 2438 | return -ENOMEM; |
| 2439 | args.acl_pages[0] = localpage; |
| 2440 | args.acl_pgbase = 0; |
J. Bruce Fields | 1d95db8 | 2005-10-13 16:54:32 -0400 | [diff] [blame] | 2441 | resp_len = args.acl_len = PAGE_SIZE; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2442 | } else { |
| 2443 | resp_buf = buf; |
| 2444 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); |
| 2445 | } |
| 2446 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 2447 | if (ret) |
| 2448 | goto out_free; |
| 2449 | if (resp_len > args.acl_len) |
| 2450 | nfs4_write_cached_acl(inode, NULL, resp_len); |
| 2451 | else |
| 2452 | nfs4_write_cached_acl(inode, resp_buf, resp_len); |
| 2453 | if (buf) { |
| 2454 | ret = -ERANGE; |
| 2455 | if (resp_len > buflen) |
| 2456 | goto out_free; |
| 2457 | if (localpage) |
| 2458 | memcpy(buf, resp_buf, resp_len); |
| 2459 | } |
| 2460 | ret = resp_len; |
| 2461 | out_free: |
| 2462 | if (localpage) |
| 2463 | __free_page(localpage); |
| 2464 | return ret; |
| 2465 | } |
| 2466 | |
| 2467 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
| 2468 | { |
| 2469 | struct nfs_server *server = NFS_SERVER(inode); |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2470 | int ret; |
| 2471 | |
| 2472 | if (!nfs4_server_supports_acls(server)) |
| 2473 | return -EOPNOTSUPP; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2474 | ret = nfs_revalidate_inode(server, inode); |
| 2475 | if (ret < 0) |
| 2476 | return ret; |
| 2477 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
| 2478 | if (ret != -ENOENT) |
| 2479 | return ret; |
| 2480 | return nfs4_get_acl_uncached(inode, buf, buflen); |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2481 | } |
| 2482 | |
J. Bruce Fields | 4b580ee | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2483 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| 2484 | { |
| 2485 | struct nfs_server *server = NFS_SERVER(inode); |
| 2486 | struct page *pages[NFS4ACL_MAXPAGES]; |
| 2487 | struct nfs_setaclargs arg = { |
| 2488 | .fh = NFS_FH(inode), |
| 2489 | .acl_pages = pages, |
| 2490 | .acl_len = buflen, |
| 2491 | }; |
| 2492 | struct rpc_message msg = { |
| 2493 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], |
| 2494 | .rpc_argp = &arg, |
| 2495 | .rpc_resp = NULL, |
| 2496 | }; |
| 2497 | int ret; |
| 2498 | |
| 2499 | if (!nfs4_server_supports_acls(server)) |
| 2500 | return -EOPNOTSUPP; |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 2501 | nfs_inode_return_delegation(inode); |
J. Bruce Fields | 4b580ee | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2502 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
| 2503 | ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2504 | if (ret == 0) |
| 2505 | nfs4_write_cached_acl(inode, buf, buflen); |
J. Bruce Fields | 4b580ee | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2506 | return ret; |
| 2507 | } |
| 2508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | static int |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2510 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | { |
| 2512 | struct nfs4_client *clp = server->nfs4_state; |
| 2513 | |
| 2514 | if (!clp || task->tk_status >= 0) |
| 2515 | return 0; |
| 2516 | switch(task->tk_status) { |
| 2517 | case -NFS4ERR_STALE_CLIENTID: |
| 2518 | case -NFS4ERR_STALE_STATEID: |
| 2519 | case -NFS4ERR_EXPIRED: |
| 2520 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); |
| 2521 | nfs4_schedule_state_recovery(clp); |
| 2522 | if (test_bit(NFS4CLNT_OK, &clp->cl_state)) |
| 2523 | rpc_wake_up_task(task); |
| 2524 | task->tk_status = 0; |
| 2525 | return -EAGAIN; |
| 2526 | case -NFS4ERR_GRACE: |
| 2527 | case -NFS4ERR_DELAY: |
| 2528 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 2529 | task->tk_status = 0; |
| 2530 | return -EAGAIN; |
| 2531 | case -NFS4ERR_OLD_STATEID: |
| 2532 | task->tk_status = 0; |
| 2533 | return -EAGAIN; |
| 2534 | } |
| 2535 | task->tk_status = nfs4_map_errors(task->tk_status); |
| 2536 | return 0; |
| 2537 | } |
| 2538 | |
| 2539 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp) |
| 2540 | { |
| 2541 | DEFINE_WAIT(wait); |
| 2542 | sigset_t oldset; |
| 2543 | int interruptible, res = 0; |
| 2544 | |
| 2545 | might_sleep(); |
| 2546 | |
| 2547 | rpc_clnt_sigmask(clnt, &oldset); |
| 2548 | interruptible = TASK_UNINTERRUPTIBLE; |
| 2549 | if (clnt->cl_intr) |
| 2550 | interruptible = TASK_INTERRUPTIBLE; |
| 2551 | prepare_to_wait(&clp->cl_waitq, &wait, interruptible); |
| 2552 | nfs4_schedule_state_recovery(clp); |
| 2553 | if (clnt->cl_intr && signalled()) |
| 2554 | res = -ERESTARTSYS; |
| 2555 | else if (!test_bit(NFS4CLNT_OK, &clp->cl_state)) |
| 2556 | schedule(); |
| 2557 | finish_wait(&clp->cl_waitq, &wait); |
| 2558 | rpc_clnt_sigunmask(clnt, &oldset); |
| 2559 | return res; |
| 2560 | } |
| 2561 | |
| 2562 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) |
| 2563 | { |
| 2564 | sigset_t oldset; |
| 2565 | int res = 0; |
| 2566 | |
| 2567 | might_sleep(); |
| 2568 | |
| 2569 | if (*timeout <= 0) |
| 2570 | *timeout = NFS4_POLL_RETRY_MIN; |
| 2571 | if (*timeout > NFS4_POLL_RETRY_MAX) |
| 2572 | *timeout = NFS4_POLL_RETRY_MAX; |
| 2573 | rpc_clnt_sigmask(clnt, &oldset); |
| 2574 | if (clnt->cl_intr) { |
Nishanth Aravamudan | 041e0e3 | 2005-09-10 00:27:23 -0700 | [diff] [blame] | 2575 | schedule_timeout_interruptible(*timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2576 | if (signalled()) |
| 2577 | res = -ERESTARTSYS; |
Nishanth Aravamudan | 041e0e3 | 2005-09-10 00:27:23 -0700 | [diff] [blame] | 2578 | } else |
| 2579 | schedule_timeout_uninterruptible(*timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | rpc_clnt_sigunmask(clnt, &oldset); |
| 2581 | *timeout <<= 1; |
| 2582 | return res; |
| 2583 | } |
| 2584 | |
| 2585 | /* This is the error handling routine for processes that are allowed |
| 2586 | * to sleep. |
| 2587 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2588 | int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | { |
| 2590 | struct nfs4_client *clp = server->nfs4_state; |
| 2591 | int ret = errorcode; |
| 2592 | |
| 2593 | exception->retry = 0; |
| 2594 | switch(errorcode) { |
| 2595 | case 0: |
| 2596 | return 0; |
| 2597 | case -NFS4ERR_STALE_CLIENTID: |
| 2598 | case -NFS4ERR_STALE_STATEID: |
| 2599 | case -NFS4ERR_EXPIRED: |
| 2600 | ret = nfs4_wait_clnt_recover(server->client, clp); |
| 2601 | if (ret == 0) |
| 2602 | exception->retry = 1; |
| 2603 | break; |
| 2604 | case -NFS4ERR_GRACE: |
| 2605 | case -NFS4ERR_DELAY: |
| 2606 | ret = nfs4_delay(server->client, &exception->timeout); |
Trond Myklebust | 2c56617 | 2005-11-04 15:33:50 -0500 | [diff] [blame] | 2607 | if (ret != 0) |
| 2608 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | case -NFS4ERR_OLD_STATEID: |
Trond Myklebust | 2c56617 | 2005-11-04 15:33:50 -0500 | [diff] [blame] | 2610 | exception->retry = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | } |
| 2612 | /* We failed to handle the error */ |
| 2613 | return nfs4_map_errors(ret); |
| 2614 | } |
| 2615 | |
| 2616 | int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port) |
| 2617 | { |
| 2618 | nfs4_verifier sc_verifier; |
| 2619 | struct nfs4_setclientid setclientid = { |
| 2620 | .sc_verifier = &sc_verifier, |
| 2621 | .sc_prog = program, |
| 2622 | }; |
| 2623 | struct rpc_message msg = { |
| 2624 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], |
| 2625 | .rpc_argp = &setclientid, |
| 2626 | .rpc_resp = clp, |
| 2627 | .rpc_cred = clp->cl_cred, |
| 2628 | }; |
| 2629 | u32 *p; |
| 2630 | int loop = 0; |
| 2631 | int status; |
| 2632 | |
| 2633 | p = (u32*)sc_verifier.data; |
| 2634 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
| 2635 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); |
| 2636 | |
| 2637 | for(;;) { |
| 2638 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, |
| 2639 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", |
| 2640 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr), |
| 2641 | clp->cl_cred->cr_ops->cr_name, |
| 2642 | clp->cl_id_uniquifier); |
| 2643 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, |
| 2644 | sizeof(setclientid.sc_netid), "tcp"); |
| 2645 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
| 2646 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", |
| 2647 | clp->cl_ipaddr, port >> 8, port & 255); |
| 2648 | |
| 2649 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 2650 | if (status != -NFS4ERR_CLID_INUSE) |
| 2651 | break; |
| 2652 | if (signalled()) |
| 2653 | break; |
| 2654 | if (loop++ & 1) |
| 2655 | ssleep(clp->cl_lease_time + 1); |
| 2656 | else |
| 2657 | if (++clp->cl_id_uniquifier == 0) |
| 2658 | break; |
| 2659 | } |
| 2660 | return status; |
| 2661 | } |
| 2662 | |
| 2663 | int |
| 2664 | nfs4_proc_setclientid_confirm(struct nfs4_client *clp) |
| 2665 | { |
| 2666 | struct nfs_fsinfo fsinfo; |
| 2667 | struct rpc_message msg = { |
| 2668 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], |
| 2669 | .rpc_argp = clp, |
| 2670 | .rpc_resp = &fsinfo, |
| 2671 | .rpc_cred = clp->cl_cred, |
| 2672 | }; |
| 2673 | unsigned long now; |
| 2674 | int status; |
| 2675 | |
| 2676 | now = jiffies; |
| 2677 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 2678 | if (status == 0) { |
| 2679 | spin_lock(&clp->cl_lock); |
| 2680 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 2681 | clp->cl_last_renewal = now; |
| 2682 | spin_unlock(&clp->cl_lock); |
| 2683 | } |
| 2684 | return status; |
| 2685 | } |
| 2686 | |
| 2687 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) |
| 2688 | { |
| 2689 | struct nfs4_delegreturnargs args = { |
| 2690 | .fhandle = NFS_FH(inode), |
| 2691 | .stateid = stateid, |
| 2692 | }; |
| 2693 | struct rpc_message msg = { |
| 2694 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], |
| 2695 | .rpc_argp = &args, |
| 2696 | .rpc_cred = cred, |
| 2697 | }; |
| 2698 | |
| 2699 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 2700 | } |
| 2701 | |
| 2702 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) |
| 2703 | { |
| 2704 | struct nfs_server *server = NFS_SERVER(inode); |
| 2705 | struct nfs4_exception exception = { }; |
| 2706 | int err; |
| 2707 | do { |
| 2708 | err = _nfs4_proc_delegreturn(inode, cred, stateid); |
| 2709 | switch (err) { |
| 2710 | case -NFS4ERR_STALE_STATEID: |
| 2711 | case -NFS4ERR_EXPIRED: |
| 2712 | nfs4_schedule_state_recovery(server->nfs4_state); |
| 2713 | case 0: |
| 2714 | return 0; |
| 2715 | } |
| 2716 | err = nfs4_handle_exception(server, err, &exception); |
| 2717 | } while (exception.retry); |
| 2718 | return err; |
| 2719 | } |
| 2720 | |
| 2721 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) |
| 2722 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) |
| 2723 | |
| 2724 | /* |
| 2725 | * sleep, with exponential backoff, and retry the LOCK operation. |
| 2726 | */ |
| 2727 | static unsigned long |
| 2728 | nfs4_set_lock_task_retry(unsigned long timeout) |
| 2729 | { |
Nishanth Aravamudan | 041e0e3 | 2005-09-10 00:27:23 -0700 | [diff] [blame] | 2730 | schedule_timeout_interruptible(timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | timeout <<= 1; |
| 2732 | if (timeout > NFS4_LOCK_MAXTIMEOUT) |
| 2733 | return NFS4_LOCK_MAXTIMEOUT; |
| 2734 | return timeout; |
| 2735 | } |
| 2736 | |
| 2737 | static inline int |
| 2738 | nfs4_lck_type(int cmd, struct file_lock *request) |
| 2739 | { |
| 2740 | /* set lock type */ |
| 2741 | switch (request->fl_type) { |
| 2742 | case F_RDLCK: |
| 2743 | return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT; |
| 2744 | case F_WRLCK: |
| 2745 | return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT; |
| 2746 | case F_UNLCK: |
| 2747 | return NFS4_WRITE_LT; |
| 2748 | } |
| 2749 | BUG(); |
| 2750 | return 0; |
| 2751 | } |
| 2752 | |
| 2753 | static inline uint64_t |
| 2754 | nfs4_lck_length(struct file_lock *request) |
| 2755 | { |
| 2756 | if (request->fl_end == OFFSET_MAX) |
| 2757 | return ~(uint64_t)0; |
| 2758 | return request->fl_end - request->fl_start + 1; |
| 2759 | } |
| 2760 | |
| 2761 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 2762 | { |
| 2763 | struct inode *inode = state->inode; |
| 2764 | struct nfs_server *server = NFS_SERVER(inode); |
| 2765 | struct nfs4_client *clp = server->nfs4_state; |
| 2766 | struct nfs_lockargs arg = { |
| 2767 | .fh = NFS_FH(inode), |
| 2768 | .type = nfs4_lck_type(cmd, request), |
| 2769 | .offset = request->fl_start, |
| 2770 | .length = nfs4_lck_length(request), |
| 2771 | }; |
| 2772 | struct nfs_lockres res = { |
| 2773 | .server = server, |
| 2774 | }; |
| 2775 | struct rpc_message msg = { |
| 2776 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], |
| 2777 | .rpc_argp = &arg, |
| 2778 | .rpc_resp = &res, |
| 2779 | .rpc_cred = state->owner->so_cred, |
| 2780 | }; |
| 2781 | struct nfs_lowner nlo; |
| 2782 | struct nfs4_lock_state *lsp; |
| 2783 | int status; |
| 2784 | |
| 2785 | down_read(&clp->cl_sem); |
| 2786 | nlo.clientid = clp->cl_clientid; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 2787 | status = nfs4_set_lock_state(state, request); |
| 2788 | if (status != 0) |
| 2789 | goto out; |
| 2790 | lsp = request->fl_u.nfs4_fl.owner; |
| 2791 | nlo.id = lsp->ls_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2792 | arg.u.lockt = &nlo; |
| 2793 | status = rpc_call_sync(server->client, &msg, 0); |
| 2794 | if (!status) { |
| 2795 | request->fl_type = F_UNLCK; |
| 2796 | } else if (status == -NFS4ERR_DENIED) { |
| 2797 | int64_t len, start, end; |
| 2798 | start = res.u.denied.offset; |
| 2799 | len = res.u.denied.length; |
| 2800 | end = start + len - 1; |
| 2801 | if (end < 0 || len == 0) |
| 2802 | request->fl_end = OFFSET_MAX; |
| 2803 | else |
| 2804 | request->fl_end = (loff_t)end; |
| 2805 | request->fl_start = (loff_t)start; |
| 2806 | request->fl_type = F_WRLCK; |
| 2807 | if (res.u.denied.type & 1) |
| 2808 | request->fl_type = F_RDLCK; |
| 2809 | request->fl_pid = 0; |
| 2810 | status = 0; |
| 2811 | } |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 2812 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2813 | up_read(&clp->cl_sem); |
| 2814 | return status; |
| 2815 | } |
| 2816 | |
| 2817 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 2818 | { |
| 2819 | struct nfs4_exception exception = { }; |
| 2820 | int err; |
| 2821 | |
| 2822 | do { |
| 2823 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| 2824 | _nfs4_proc_getlk(state, cmd, request), |
| 2825 | &exception); |
| 2826 | } while (exception.retry); |
| 2827 | return err; |
| 2828 | } |
| 2829 | |
| 2830 | static int do_vfs_lock(struct file *file, struct file_lock *fl) |
| 2831 | { |
| 2832 | int res = 0; |
| 2833 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { |
| 2834 | case FL_POSIX: |
| 2835 | res = posix_lock_file_wait(file, fl); |
| 2836 | break; |
| 2837 | case FL_FLOCK: |
| 2838 | res = flock_lock_file_wait(file, fl); |
| 2839 | break; |
| 2840 | default: |
| 2841 | BUG(); |
| 2842 | } |
| 2843 | if (res < 0) |
| 2844 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", |
| 2845 | __FUNCTION__); |
| 2846 | return res; |
| 2847 | } |
| 2848 | |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2849 | struct nfs4_unlockdata { |
| 2850 | struct nfs_lockargs arg; |
| 2851 | struct nfs_locku_opargs luargs; |
| 2852 | struct nfs_lockres res; |
| 2853 | struct nfs4_lock_state *lsp; |
| 2854 | struct nfs_open_context *ctx; |
| 2855 | atomic_t refcount; |
| 2856 | struct completion completion; |
| 2857 | }; |
| 2858 | |
| 2859 | static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2860 | { |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2861 | if (atomic_dec_and_test(&calldata->refcount)) { |
| 2862 | nfs_free_seqid(calldata->luargs.seqid); |
| 2863 | nfs4_put_lock_state(calldata->lsp); |
| 2864 | put_nfs_open_context(calldata->ctx); |
| 2865 | kfree(calldata); |
| 2866 | } |
| 2867 | } |
| 2868 | |
| 2869 | static void nfs4_locku_complete(struct nfs4_unlockdata *calldata) |
| 2870 | { |
| 2871 | complete(&calldata->completion); |
| 2872 | nfs4_locku_release_calldata(calldata); |
| 2873 | } |
| 2874 | |
| 2875 | static void nfs4_locku_done(struct rpc_task *task) |
| 2876 | { |
| 2877 | struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata; |
| 2878 | |
| 2879 | nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid); |
| 2880 | switch (task->tk_status) { |
| 2881 | case 0: |
| 2882 | memcpy(calldata->lsp->ls_stateid.data, |
| 2883 | calldata->res.u.stateid.data, |
| 2884 | sizeof(calldata->lsp->ls_stateid.data)); |
| 2885 | break; |
| 2886 | case -NFS4ERR_STALE_STATEID: |
| 2887 | case -NFS4ERR_EXPIRED: |
| 2888 | nfs4_schedule_state_recovery(calldata->res.server->nfs4_state); |
| 2889 | break; |
| 2890 | default: |
| 2891 | if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) { |
| 2892 | rpc_restart_call(task); |
| 2893 | return; |
| 2894 | } |
| 2895 | } |
| 2896 | nfs4_locku_complete(calldata); |
| 2897 | } |
| 2898 | |
| 2899 | static void nfs4_locku_begin(struct rpc_task *task) |
| 2900 | { |
| 2901 | struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2902 | struct rpc_message msg = { |
| 2903 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2904 | .rpc_argp = &calldata->arg, |
| 2905 | .rpc_resp = &calldata->res, |
| 2906 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2907 | }; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 2908 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2909 | |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2910 | status = nfs_wait_on_sequence(calldata->luargs.seqid, task); |
| 2911 | if (status != 0) |
| 2912 | return; |
| 2913 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { |
| 2914 | nfs4_locku_complete(calldata); |
| 2915 | task->tk_exit = NULL; |
| 2916 | rpc_exit(task, 0); |
| 2917 | return; |
| 2918 | } |
| 2919 | rpc_call_setup(task, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2920 | } |
| 2921 | |
| 2922 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 2923 | { |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2924 | struct nfs4_unlockdata *calldata; |
| 2925 | struct inode *inode = state->inode; |
| 2926 | struct nfs_server *server = NFS_SERVER(inode); |
| 2927 | struct nfs4_lock_state *lsp; |
| 2928 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2929 | |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 2930 | /* Is this a delegated lock? */ |
| 2931 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 2932 | return do_vfs_lock(request->fl_file, request); |
| 2933 | |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2934 | status = nfs4_set_lock_state(state, request); |
| 2935 | if (status != 0) |
| 2936 | return status; |
| 2937 | lsp = request->fl_u.nfs4_fl.owner; |
| 2938 | /* We might have lost the locks! */ |
| 2939 | if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) |
| 2940 | return 0; |
| 2941 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
| 2942 | if (calldata == NULL) |
| 2943 | return -ENOMEM; |
| 2944 | calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
| 2945 | if (calldata->luargs.seqid == NULL) { |
| 2946 | kfree(calldata); |
| 2947 | return -ENOMEM; |
| 2948 | } |
| 2949 | calldata->luargs.stateid = &lsp->ls_stateid; |
| 2950 | calldata->arg.fh = NFS_FH(inode); |
| 2951 | calldata->arg.type = nfs4_lck_type(cmd, request); |
| 2952 | calldata->arg.offset = request->fl_start; |
| 2953 | calldata->arg.length = nfs4_lck_length(request); |
| 2954 | calldata->arg.u.locku = &calldata->luargs; |
| 2955 | calldata->res.server = server; |
| 2956 | calldata->lsp = lsp; |
| 2957 | atomic_inc(&lsp->ls_count); |
| 2958 | |
| 2959 | /* Ensure we don't close file until we're done freeing locks! */ |
| 2960 | calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data); |
| 2961 | |
| 2962 | atomic_set(&calldata->refcount, 2); |
| 2963 | init_completion(&calldata->completion); |
| 2964 | |
| 2965 | status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin, |
| 2966 | nfs4_locku_done, calldata); |
| 2967 | if (status == 0) |
| 2968 | wait_for_completion_interruptible(&calldata->completion); |
| 2969 | do_vfs_lock(request->fl_file, request); |
| 2970 | nfs4_locku_release_calldata(calldata); |
| 2971 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2972 | } |
| 2973 | |
| 2974 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim) |
| 2975 | { |
| 2976 | struct inode *inode = state->inode; |
| 2977 | struct nfs_server *server = NFS_SERVER(inode); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 2978 | struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2979 | struct nfs_lock_opargs largs = { |
| 2980 | .lock_stateid = &lsp->ls_stateid, |
| 2981 | .open_stateid = &state->stateid, |
| 2982 | .lock_owner = { |
| 2983 | .clientid = server->nfs4_state->cl_clientid, |
| 2984 | .id = lsp->ls_id, |
| 2985 | }, |
| 2986 | .reclaim = reclaim, |
| 2987 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2988 | struct nfs_lockargs arg = { |
| 2989 | .fh = NFS_FH(inode), |
| 2990 | .type = nfs4_lck_type(cmd, request), |
| 2991 | .offset = request->fl_start, |
| 2992 | .length = nfs4_lck_length(request), |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2993 | .u = { |
| 2994 | .lock = &largs, |
| 2995 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2996 | }; |
| 2997 | struct nfs_lockres res = { |
| 2998 | .server = server, |
| 2999 | }; |
| 3000 | struct rpc_message msg = { |
| 3001 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
| 3002 | .rpc_argp = &arg, |
| 3003 | .rpc_resp = &res, |
| 3004 | .rpc_cred = state->owner->so_cred, |
| 3005 | }; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 3006 | int status = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3007 | |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3008 | largs.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
| 3009 | if (largs.lock_seqid == NULL) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 3010 | return -ENOMEM; |
| 3011 | if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | struct nfs4_state_owner *owner = state->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3013 | |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3014 | largs.open_seqid = nfs_alloc_seqid(&owner->so_seqid); |
| 3015 | if (largs.open_seqid == NULL) |
| 3016 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3017 | largs.new_lock_owner = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3019 | /* increment open seqid on success, and seqid mutating errors */ |
| 3020 | if (largs.new_lock_owner != 0) { |
| 3021 | nfs_increment_open_seqid(status, largs.open_seqid); |
| 3022 | if (status == 0) |
| 3023 | nfs_confirm_seqid(&lsp->ls_seqid, 0); |
| 3024 | } |
| 3025 | nfs_free_seqid(largs.open_seqid); |
| 3026 | } else |
| 3027 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
| 3028 | /* increment lock seqid on success, and seqid mutating errors*/ |
| 3029 | nfs_increment_lock_seqid(status, largs.lock_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | /* save the returned stateid. */ |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 3031 | if (status == 0) { |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3032 | memcpy(lsp->ls_stateid.data, res.u.stateid.data, |
| 3033 | sizeof(lsp->ls_stateid.data)); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 3034 | lsp->ls_flags |= NFS_LOCK_INITIALIZED; |
| 3035 | } else if (status == -NFS4ERR_DENIED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3036 | status = -EAGAIN; |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3037 | out: |
| 3038 | nfs_free_seqid(largs.lock_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3039 | return status; |
| 3040 | } |
| 3041 | |
| 3042 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) |
| 3043 | { |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3044 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 3045 | struct nfs4_exception exception = { }; |
| 3046 | int err; |
| 3047 | |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3048 | /* Cache the lock if possible... */ |
| 3049 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 3050 | return 0; |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3051 | do { |
| 3052 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
| 3053 | if (err != -NFS4ERR_DELAY) |
| 3054 | break; |
| 3055 | nfs4_handle_exception(server, err, &exception); |
| 3056 | } while (exception.retry); |
| 3057 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3058 | } |
| 3059 | |
| 3060 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| 3061 | { |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3062 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 3063 | struct nfs4_exception exception = { }; |
| 3064 | int err; |
| 3065 | |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3066 | err = nfs4_set_lock_state(state, request); |
| 3067 | if (err != 0) |
| 3068 | return err; |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3069 | do { |
| 3070 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
| 3071 | if (err != -NFS4ERR_DELAY) |
| 3072 | break; |
| 3073 | nfs4_handle_exception(server, err, &exception); |
| 3074 | } while (exception.retry); |
| 3075 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3076 | } |
| 3077 | |
| 3078 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3079 | { |
| 3080 | struct nfs4_client *clp = state->owner->so_client; |
| 3081 | int status; |
| 3082 | |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3083 | /* Is this a delegated open? */ |
Trond Myklebust | ff60406 | 2005-11-25 17:10:01 -0500 | [diff] [blame] | 3084 | if (NFS_I(state->inode)->delegation_state != 0) { |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3085 | /* Yes: cache locks! */ |
| 3086 | status = do_vfs_lock(request->fl_file, request); |
| 3087 | /* ...but avoid races with delegation recall... */ |
| 3088 | if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags)) |
Trond Myklebust | ff60406 | 2005-11-25 17:10:01 -0500 | [diff] [blame] | 3089 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3090 | } |
Trond Myklebust | ff60406 | 2005-11-25 17:10:01 -0500 | [diff] [blame] | 3091 | down_read(&clp->cl_sem); |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3092 | status = nfs4_set_lock_state(state, request); |
| 3093 | if (status != 0) |
| 3094 | goto out; |
| 3095 | status = _nfs4_do_setlk(state, cmd, request, 0); |
| 3096 | if (status != 0) |
| 3097 | goto out; |
| 3098 | /* Note: we always want to sleep here! */ |
| 3099 | request->fl_flags |= FL_SLEEP; |
| 3100 | if (do_vfs_lock(request->fl_file, request) < 0) |
| 3101 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); |
| 3102 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3103 | up_read(&clp->cl_sem); |
| 3104 | return status; |
| 3105 | } |
| 3106 | |
| 3107 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3108 | { |
| 3109 | struct nfs4_exception exception = { }; |
| 3110 | int err; |
| 3111 | |
| 3112 | do { |
| 3113 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| 3114 | _nfs4_proc_setlk(state, cmd, request), |
| 3115 | &exception); |
| 3116 | } while (exception.retry); |
| 3117 | return err; |
| 3118 | } |
| 3119 | |
| 3120 | static int |
| 3121 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) |
| 3122 | { |
| 3123 | struct nfs_open_context *ctx; |
| 3124 | struct nfs4_state *state; |
| 3125 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; |
| 3126 | int status; |
| 3127 | |
| 3128 | /* verify open state */ |
| 3129 | ctx = (struct nfs_open_context *)filp->private_data; |
| 3130 | state = ctx->state; |
| 3131 | |
| 3132 | if (request->fl_start < 0 || request->fl_end < 0) |
| 3133 | return -EINVAL; |
| 3134 | |
| 3135 | if (IS_GETLK(cmd)) |
| 3136 | return nfs4_proc_getlk(state, F_GETLK, request); |
| 3137 | |
| 3138 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) |
| 3139 | return -EINVAL; |
| 3140 | |
| 3141 | if (request->fl_type == F_UNLCK) |
| 3142 | return nfs4_proc_unlck(state, cmd, request); |
| 3143 | |
| 3144 | do { |
| 3145 | status = nfs4_proc_setlk(state, cmd, request); |
| 3146 | if ((status != -EAGAIN) || IS_SETLK(cmd)) |
| 3147 | break; |
| 3148 | timeout = nfs4_set_lock_task_retry(timeout); |
| 3149 | status = -ERESTARTSYS; |
| 3150 | if (signalled()) |
| 3151 | break; |
| 3152 | } while(status < 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3153 | return status; |
| 3154 | } |
| 3155 | |
Trond Myklebust | 888e694 | 2005-11-04 15:38:11 -0500 | [diff] [blame] | 3156 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
| 3157 | { |
| 3158 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 3159 | struct nfs4_exception exception = { }; |
| 3160 | int err; |
| 3161 | |
| 3162 | err = nfs4_set_lock_state(state, fl); |
| 3163 | if (err != 0) |
| 3164 | goto out; |
| 3165 | do { |
| 3166 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); |
| 3167 | if (err != -NFS4ERR_DELAY) |
| 3168 | break; |
| 3169 | err = nfs4_handle_exception(server, err, &exception); |
| 3170 | } while (exception.retry); |
| 3171 | out: |
| 3172 | return err; |
| 3173 | } |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3174 | |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3175 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
| 3176 | |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3177 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
| 3178 | size_t buflen, int flags) |
| 3179 | { |
J. Bruce Fields | 4b580ee | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 3180 | struct inode *inode = dentry->d_inode; |
| 3181 | |
| 3182 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) |
| 3183 | return -EOPNOTSUPP; |
| 3184 | |
| 3185 | if (!S_ISREG(inode->i_mode) && |
| 3186 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) |
| 3187 | return -EPERM; |
| 3188 | |
| 3189 | return nfs4_proc_set_acl(inode, buf, buflen); |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3190 | } |
| 3191 | |
| 3192 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, |
| 3193 | * and that's what we'll do for e.g. user attributes that haven't been set. |
| 3194 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported |
| 3195 | * attributes in kernel-managed attribute namespaces. */ |
| 3196 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, |
| 3197 | size_t buflen) |
| 3198 | { |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3199 | struct inode *inode = dentry->d_inode; |
| 3200 | |
| 3201 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) |
| 3202 | return -EOPNOTSUPP; |
| 3203 | |
| 3204 | return nfs4_proc_get_acl(inode, buf, buflen); |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3205 | } |
| 3206 | |
| 3207 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) |
| 3208 | { |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3209 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3210 | |
| 3211 | if (buf && buflen < len) |
| 3212 | return -ERANGE; |
| 3213 | if (buf) |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3214 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
| 3215 | return len; |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3216 | } |
| 3217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3218 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
| 3219 | .recover_open = nfs4_open_reclaim, |
| 3220 | .recover_lock = nfs4_lock_reclaim, |
| 3221 | }; |
| 3222 | |
| 3223 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { |
| 3224 | .recover_open = nfs4_open_expired, |
| 3225 | .recover_lock = nfs4_lock_expired, |
| 3226 | }; |
| 3227 | |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3228 | static struct inode_operations nfs4_file_inode_operations = { |
| 3229 | .permission = nfs_permission, |
| 3230 | .getattr = nfs_getattr, |
| 3231 | .setattr = nfs_setattr, |
| 3232 | .getxattr = nfs4_getxattr, |
| 3233 | .setxattr = nfs4_setxattr, |
| 3234 | .listxattr = nfs4_listxattr, |
| 3235 | }; |
| 3236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | struct nfs_rpc_ops nfs_v4_clientops = { |
| 3238 | .version = 4, /* protocol version */ |
| 3239 | .dentry_ops = &nfs4_dentry_operations, |
| 3240 | .dir_inode_ops = &nfs4_dir_inode_operations, |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3241 | .file_inode_ops = &nfs4_file_inode_operations, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | .getroot = nfs4_proc_get_root, |
| 3243 | .getattr = nfs4_proc_getattr, |
| 3244 | .setattr = nfs4_proc_setattr, |
| 3245 | .lookup = nfs4_proc_lookup, |
| 3246 | .access = nfs4_proc_access, |
| 3247 | .readlink = nfs4_proc_readlink, |
| 3248 | .read = nfs4_proc_read, |
| 3249 | .write = nfs4_proc_write, |
| 3250 | .commit = nfs4_proc_commit, |
| 3251 | .create = nfs4_proc_create, |
| 3252 | .remove = nfs4_proc_remove, |
| 3253 | .unlink_setup = nfs4_proc_unlink_setup, |
| 3254 | .unlink_done = nfs4_proc_unlink_done, |
| 3255 | .rename = nfs4_proc_rename, |
| 3256 | .link = nfs4_proc_link, |
| 3257 | .symlink = nfs4_proc_symlink, |
| 3258 | .mkdir = nfs4_proc_mkdir, |
| 3259 | .rmdir = nfs4_proc_remove, |
| 3260 | .readdir = nfs4_proc_readdir, |
| 3261 | .mknod = nfs4_proc_mknod, |
| 3262 | .statfs = nfs4_proc_statfs, |
| 3263 | .fsinfo = nfs4_proc_fsinfo, |
| 3264 | .pathconf = nfs4_proc_pathconf, |
| 3265 | .decode_dirent = nfs4_decode_dirent, |
| 3266 | .read_setup = nfs4_proc_read_setup, |
| 3267 | .write_setup = nfs4_proc_write_setup, |
| 3268 | .commit_setup = nfs4_proc_commit_setup, |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 3269 | .file_open = nfs_open, |
| 3270 | .file_release = nfs_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3271 | .lock = nfs4_proc_lock, |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 3272 | .clear_acl_cache = nfs4_zap_acl_attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3273 | }; |
| 3274 | |
| 3275 | /* |
| 3276 | * Local variables: |
| 3277 | * c-basic-offset: 8 |
| 3278 | * End: |
| 3279 | */ |