1 /* 2 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> 3 */ 4 #include <linux/fs.h> 5 #include <linux/sunrpc/sched.h> 6 #include <linux/nfs.h> 7 #include <linux/nfs3.h> 8 #include <linux/nfs4.h> 9 #include <linux/nfs_xdr.h> 10 #include <linux/nfs_fs.h> 11 #include "nfs4_fs.h" 12 #include "nfs42.h" 13 #include "iostat.h" 14 #include "pnfs.h" 15 #include "internal.h" 16 17 #define NFSDBG_FACILITY NFSDBG_PROC 18 19 static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, 20 struct nfs_lock_context *lock, loff_t offset, loff_t len) 21 { 22 struct inode *inode = file_inode(filep); 23 struct nfs_server *server = NFS_SERVER(inode); 24 struct nfs42_falloc_args args = { 25 .falloc_fh = NFS_FH(inode), 26 .falloc_offset = offset, 27 .falloc_length = len, 28 .falloc_bitmask = server->cache_consistency_bitmask, 29 }; 30 struct nfs42_falloc_res res = { 31 .falloc_server = server, 32 }; 33 int status; 34 35 msg->rpc_argp = &args; 36 msg->rpc_resp = &res; 37 38 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, 39 lock, FMODE_WRITE); 40 if (status) 41 return status; 42 43 res.falloc_fattr = nfs_alloc_fattr(); 44 if (!res.falloc_fattr) 45 return -ENOMEM; 46 47 status = nfs4_call_sync(server->client, server, msg, 48 &args.seq_args, &res.seq_res, 0); 49 if (status == 0) 50 status = nfs_post_op_update_inode(inode, res.falloc_fattr); 51 52 kfree(res.falloc_fattr); 53 return status; 54 } 55 56 static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, 57 loff_t offset, loff_t len) 58 { 59 struct nfs_server *server = NFS_SERVER(file_inode(filep)); 60 struct nfs4_exception exception = { }; 61 struct nfs_lock_context *lock; 62 int err; 63 64 lock = nfs_get_lock_context(nfs_file_open_context(filep)); 65 if (IS_ERR(lock)) 66 return PTR_ERR(lock); 67 68 exception.inode = file_inode(filep); 69 exception.state = lock->open_context->state; 70 71 do { 72 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len); 73 if (err == -ENOTSUPP) { 74 err = -EOPNOTSUPP; 75 break; 76 } 77 err = nfs4_handle_exception(server, err, &exception); 78 } while (exception.retry); 79 80 nfs_put_lock_context(lock); 81 return err; 82 } 83 84 int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) 85 { 86 struct rpc_message msg = { 87 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], 88 }; 89 struct inode *inode = file_inode(filep); 90 int err; 91 92 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) 93 return -EOPNOTSUPP; 94 95 inode_lock(inode); 96 97 err = nfs42_proc_fallocate(&msg, filep, offset, len); 98 if (err == -EOPNOTSUPP) 99 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; 100 101 inode_unlock(inode); 102 return err; 103 } 104 105 int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) 106 { 107 struct rpc_message msg = { 108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], 109 }; 110 struct inode *inode = file_inode(filep); 111 int err; 112 113 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) 114 return -EOPNOTSUPP; 115 116 inode_lock(inode); 117 err = nfs_sync_inode(inode); 118 if (err) 119 goto out_unlock; 120 121 err = nfs42_proc_fallocate(&msg, filep, offset, len); 122 if (err == 0) 123 truncate_pagecache_range(inode, offset, (offset + len) -1); 124 if (err == -EOPNOTSUPP) 125 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; 126 out_unlock: 127 inode_unlock(inode); 128 return err; 129 } 130 131 static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src, 132 struct nfs_lock_context *src_lock, 133 struct file *dst, loff_t pos_dst, 134 struct nfs_lock_context *dst_lock, 135 size_t count) 136 { 137 struct nfs42_copy_args args = { 138 .src_fh = NFS_FH(file_inode(src)), 139 .src_pos = pos_src, 140 .dst_fh = NFS_FH(file_inode(dst)), 141 .dst_pos = pos_dst, 142 .count = count, 143 }; 144 struct nfs42_copy_res res; 145 struct rpc_message msg = { 146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY], 147 .rpc_argp = &args, 148 .rpc_resp = &res, 149 }; 150 struct inode *dst_inode = file_inode(dst); 151 struct nfs_server *server = NFS_SERVER(dst_inode); 152 int status; 153 154 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, 155 src_lock, FMODE_READ); 156 if (status) 157 return status; 158 159 status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping, 160 pos_src, pos_src + (loff_t)count - 1); 161 if (status) 162 return status; 163 164 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, 165 dst_lock, FMODE_WRITE); 166 if (status) 167 return status; 168 169 status = nfs_sync_inode(dst_inode); 170 if (status) 171 return status; 172 173 status = nfs4_call_sync(server->client, server, &msg, 174 &args.seq_args, &res.seq_res, 0); 175 if (status == -ENOTSUPP) 176 server->caps &= ~NFS_CAP_COPY; 177 if (status) 178 return status; 179 180 if (res.write_res.verifier.committed != NFS_FILE_SYNC) { 181 status = nfs_commit_file(dst, &res.write_res.verifier.verifier); 182 if (status) 183 return status; 184 } 185 186 truncate_pagecache_range(dst_inode, pos_dst, 187 pos_dst + res.write_res.count); 188 189 return res.write_res.count; 190 } 191 192 ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src, 193 struct file *dst, loff_t pos_dst, 194 size_t count) 195 { 196 struct nfs_server *server = NFS_SERVER(file_inode(dst)); 197 struct nfs_lock_context *src_lock; 198 struct nfs_lock_context *dst_lock; 199 struct nfs4_exception src_exception = { }; 200 struct nfs4_exception dst_exception = { }; 201 ssize_t err, err2; 202 203 if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY)) 204 return -EOPNOTSUPP; 205 206 src_lock = nfs_get_lock_context(nfs_file_open_context(src)); 207 if (IS_ERR(src_lock)) 208 return PTR_ERR(src_lock); 209 210 src_exception.inode = file_inode(src); 211 src_exception.state = src_lock->open_context->state; 212 213 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst)); 214 if (IS_ERR(dst_lock)) { 215 err = PTR_ERR(dst_lock); 216 goto out_put_src_lock; 217 } 218 219 dst_exception.inode = file_inode(dst); 220 dst_exception.state = dst_lock->open_context->state; 221 222 do { 223 inode_lock(file_inode(dst)); 224 err = _nfs42_proc_copy(src, pos_src, src_lock, 225 dst, pos_dst, dst_lock, count); 226 inode_unlock(file_inode(dst)); 227 228 if (err == -ENOTSUPP) { 229 err = -EOPNOTSUPP; 230 break; 231 } 232 233 err2 = nfs4_handle_exception(server, err, &src_exception); 234 err = nfs4_handle_exception(server, err, &dst_exception); 235 if (!err) 236 err = err2; 237 } while (src_exception.retry || dst_exception.retry); 238 239 nfs_put_lock_context(dst_lock); 240 out_put_src_lock: 241 nfs_put_lock_context(src_lock); 242 return err; 243 } 244 245 static loff_t _nfs42_proc_llseek(struct file *filep, 246 struct nfs_lock_context *lock, loff_t offset, int whence) 247 { 248 struct inode *inode = file_inode(filep); 249 struct nfs42_seek_args args = { 250 .sa_fh = NFS_FH(inode), 251 .sa_offset = offset, 252 .sa_what = (whence == SEEK_HOLE) ? 253 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, 254 }; 255 struct nfs42_seek_res res; 256 struct rpc_message msg = { 257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], 258 .rpc_argp = &args, 259 .rpc_resp = &res, 260 }; 261 struct nfs_server *server = NFS_SERVER(inode); 262 int status; 263 264 if (!nfs_server_capable(inode, NFS_CAP_SEEK)) 265 return -ENOTSUPP; 266 267 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, 268 lock, FMODE_READ); 269 if (status) 270 return status; 271 272 status = nfs_filemap_write_and_wait_range(inode->i_mapping, 273 offset, LLONG_MAX); 274 if (status) 275 return status; 276 277 status = nfs4_call_sync(server->client, server, &msg, 278 &args.seq_args, &res.seq_res, 0); 279 if (status == -ENOTSUPP) 280 server->caps &= ~NFS_CAP_SEEK; 281 if (status) 282 return status; 283 284 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); 285 } 286 287 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) 288 { 289 struct nfs_server *server = NFS_SERVER(file_inode(filep)); 290 struct nfs4_exception exception = { }; 291 struct nfs_lock_context *lock; 292 loff_t err; 293 294 lock = nfs_get_lock_context(nfs_file_open_context(filep)); 295 if (IS_ERR(lock)) 296 return PTR_ERR(lock); 297 298 exception.inode = file_inode(filep); 299 exception.state = lock->open_context->state; 300 301 do { 302 err = _nfs42_proc_llseek(filep, lock, offset, whence); 303 if (err >= 0) 304 break; 305 if (err == -ENOTSUPP) { 306 err = -EOPNOTSUPP; 307 break; 308 } 309 err = nfs4_handle_exception(server, err, &exception); 310 } while (exception.retry); 311 312 nfs_put_lock_context(lock); 313 return err; 314 } 315 316 317 static void 318 nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) 319 { 320 struct nfs42_layoutstat_data *data = calldata; 321 struct inode *inode = data->inode; 322 struct nfs_server *server = NFS_SERVER(inode); 323 struct pnfs_layout_hdr *lo; 324 325 spin_lock(&inode->i_lock); 326 lo = NFS_I(inode)->layout; 327 if (!pnfs_layout_is_valid(lo)) { 328 spin_unlock(&inode->i_lock); 329 rpc_exit(task, 0); 330 return; 331 } 332 nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid); 333 spin_unlock(&inode->i_lock); 334 nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args, 335 &data->res.seq_res, task); 336 337 } 338 339 static void 340 nfs42_layoutstat_done(struct rpc_task *task, void *calldata) 341 { 342 struct nfs42_layoutstat_data *data = calldata; 343 struct inode *inode = data->inode; 344 struct pnfs_layout_hdr *lo; 345 346 if (!nfs4_sequence_done(task, &data->res.seq_res)) 347 return; 348 349 switch (task->tk_status) { 350 case 0: 351 break; 352 case -NFS4ERR_EXPIRED: 353 case -NFS4ERR_ADMIN_REVOKED: 354 case -NFS4ERR_DELEG_REVOKED: 355 case -NFS4ERR_STALE_STATEID: 356 case -NFS4ERR_BAD_STATEID: 357 spin_lock(&inode->i_lock); 358 lo = NFS_I(inode)->layout; 359 if (pnfs_layout_is_valid(lo) && 360 nfs4_stateid_match(&data->args.stateid, 361 &lo->plh_stateid)) { 362 LIST_HEAD(head); 363 364 /* 365 * Mark the bad layout state as invalid, then retry 366 * with the current stateid. 367 */ 368 pnfs_mark_layout_stateid_invalid(lo, &head); 369 spin_unlock(&inode->i_lock); 370 pnfs_free_lseg_list(&head); 371 } else 372 spin_unlock(&inode->i_lock); 373 break; 374 case -NFS4ERR_OLD_STATEID: 375 spin_lock(&inode->i_lock); 376 lo = NFS_I(inode)->layout; 377 if (pnfs_layout_is_valid(lo) && 378 nfs4_stateid_match_other(&data->args.stateid, 379 &lo->plh_stateid)) { 380 /* Do we need to delay before resending? */ 381 if (!nfs4_stateid_is_newer(&lo->plh_stateid, 382 &data->args.stateid)) 383 rpc_delay(task, HZ); 384 rpc_restart_call_prepare(task); 385 } 386 spin_unlock(&inode->i_lock); 387 break; 388 case -ENOTSUPP: 389 case -EOPNOTSUPP: 390 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; 391 } 392 393 dprintk("%s server returns %d\n", __func__, task->tk_status); 394 } 395 396 static void 397 nfs42_layoutstat_release(void *calldata) 398 { 399 struct nfs42_layoutstat_data *data = calldata; 400 struct nfs_server *nfss = NFS_SERVER(data->args.inode); 401 402 if (nfss->pnfs_curr_ld->cleanup_layoutstats) 403 nfss->pnfs_curr_ld->cleanup_layoutstats(data); 404 405 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); 406 smp_mb__before_atomic(); 407 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); 408 smp_mb__after_atomic(); 409 nfs_iput_and_deactive(data->inode); 410 kfree(data->args.devinfo); 411 kfree(data); 412 } 413 414 static const struct rpc_call_ops nfs42_layoutstat_ops = { 415 .rpc_call_prepare = nfs42_layoutstat_prepare, 416 .rpc_call_done = nfs42_layoutstat_done, 417 .rpc_release = nfs42_layoutstat_release, 418 }; 419 420 int nfs42_proc_layoutstats_generic(struct nfs_server *server, 421 struct nfs42_layoutstat_data *data) 422 { 423 struct rpc_message msg = { 424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], 425 .rpc_argp = &data->args, 426 .rpc_resp = &data->res, 427 }; 428 struct rpc_task_setup task_setup = { 429 .rpc_client = server->client, 430 .rpc_message = &msg, 431 .callback_ops = &nfs42_layoutstat_ops, 432 .callback_data = data, 433 .flags = RPC_TASK_ASYNC, 434 }; 435 struct rpc_task *task; 436 437 data->inode = nfs_igrab_and_active(data->args.inode); 438 if (!data->inode) { 439 nfs42_layoutstat_release(data); 440 return -EAGAIN; 441 } 442 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 443 task = rpc_run_task(&task_setup); 444 if (IS_ERR(task)) 445 return PTR_ERR(task); 446 rpc_put_task(task); 447 return 0; 448 } 449 450 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, 451 struct file *dst_f, struct nfs_lock_context *src_lock, 452 struct nfs_lock_context *dst_lock, loff_t src_offset, 453 loff_t dst_offset, loff_t count) 454 { 455 struct inode *src_inode = file_inode(src_f); 456 struct inode *dst_inode = file_inode(dst_f); 457 struct nfs_server *server = NFS_SERVER(dst_inode); 458 struct nfs42_clone_args args = { 459 .src_fh = NFS_FH(src_inode), 460 .dst_fh = NFS_FH(dst_inode), 461 .src_offset = src_offset, 462 .dst_offset = dst_offset, 463 .count = count, 464 .dst_bitmask = server->cache_consistency_bitmask, 465 }; 466 struct nfs42_clone_res res = { 467 .server = server, 468 }; 469 int status; 470 471 msg->rpc_argp = &args; 472 msg->rpc_resp = &res; 473 474 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, 475 src_lock, FMODE_READ); 476 if (status) 477 return status; 478 479 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, 480 dst_lock, FMODE_WRITE); 481 if (status) 482 return status; 483 484 res.dst_fattr = nfs_alloc_fattr(); 485 if (!res.dst_fattr) 486 return -ENOMEM; 487 488 status = nfs4_call_sync(server->client, server, msg, 489 &args.seq_args, &res.seq_res, 0); 490 if (status == 0) 491 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); 492 493 kfree(res.dst_fattr); 494 return status; 495 } 496 497 int nfs42_proc_clone(struct file *src_f, struct file *dst_f, 498 loff_t src_offset, loff_t dst_offset, loff_t count) 499 { 500 struct rpc_message msg = { 501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], 502 }; 503 struct inode *inode = file_inode(src_f); 504 struct nfs_server *server = NFS_SERVER(file_inode(src_f)); 505 struct nfs_lock_context *src_lock; 506 struct nfs_lock_context *dst_lock; 507 struct nfs4_exception src_exception = { }; 508 struct nfs4_exception dst_exception = { }; 509 int err, err2; 510 511 if (!nfs_server_capable(inode, NFS_CAP_CLONE)) 512 return -EOPNOTSUPP; 513 514 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); 515 if (IS_ERR(src_lock)) 516 return PTR_ERR(src_lock); 517 518 src_exception.inode = file_inode(src_f); 519 src_exception.state = src_lock->open_context->state; 520 521 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); 522 if (IS_ERR(dst_lock)) { 523 err = PTR_ERR(dst_lock); 524 goto out_put_src_lock; 525 } 526 527 dst_exception.inode = file_inode(dst_f); 528 dst_exception.state = dst_lock->open_context->state; 529 530 do { 531 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, 532 src_offset, dst_offset, count); 533 if (err == -ENOTSUPP || err == -EOPNOTSUPP) { 534 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; 535 err = -EOPNOTSUPP; 536 break; 537 } 538 539 err2 = nfs4_handle_exception(server, err, &src_exception); 540 err = nfs4_handle_exception(server, err, &dst_exception); 541 if (!err) 542 err = err2; 543 } while (src_exception.retry || dst_exception.retry); 544 545 nfs_put_lock_context(dst_lock); 546 out_put_src_lock: 547 nfs_put_lock_context(src_lock); 548 return err; 549 } 550