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 nfs_server *server = NFS_SERVER(data->args.inode); 322 323 nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args, 324 &data->res.seq_res, task); 325 } 326 327 static void 328 nfs42_layoutstat_done(struct rpc_task *task, void *calldata) 329 { 330 struct nfs42_layoutstat_data *data = calldata; 331 struct inode *inode = data->inode; 332 struct pnfs_layout_hdr *lo; 333 334 if (!nfs4_sequence_done(task, &data->res.seq_res)) 335 return; 336 337 switch (task->tk_status) { 338 case 0: 339 break; 340 case -NFS4ERR_EXPIRED: 341 case -NFS4ERR_STALE_STATEID: 342 case -NFS4ERR_OLD_STATEID: 343 case -NFS4ERR_BAD_STATEID: 344 spin_lock(&inode->i_lock); 345 lo = NFS_I(inode)->layout; 346 if (lo && nfs4_stateid_match(&data->args.stateid, 347 &lo->plh_stateid)) { 348 LIST_HEAD(head); 349 350 /* 351 * Mark the bad layout state as invalid, then retry 352 * with the current stateid. 353 */ 354 pnfs_mark_layout_stateid_invalid(lo, &head); 355 spin_unlock(&inode->i_lock); 356 pnfs_free_lseg_list(&head); 357 } else 358 spin_unlock(&inode->i_lock); 359 break; 360 case -ENOTSUPP: 361 case -EOPNOTSUPP: 362 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; 363 default: 364 break; 365 } 366 367 dprintk("%s server returns %d\n", __func__, task->tk_status); 368 } 369 370 static void 371 nfs42_layoutstat_release(void *calldata) 372 { 373 struct nfs42_layoutstat_data *data = calldata; 374 struct nfs_server *nfss = NFS_SERVER(data->args.inode); 375 376 if (nfss->pnfs_curr_ld->cleanup_layoutstats) 377 nfss->pnfs_curr_ld->cleanup_layoutstats(data); 378 379 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); 380 smp_mb__before_atomic(); 381 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); 382 smp_mb__after_atomic(); 383 nfs_iput_and_deactive(data->inode); 384 kfree(data->args.devinfo); 385 kfree(data); 386 } 387 388 static const struct rpc_call_ops nfs42_layoutstat_ops = { 389 .rpc_call_prepare = nfs42_layoutstat_prepare, 390 .rpc_call_done = nfs42_layoutstat_done, 391 .rpc_release = nfs42_layoutstat_release, 392 }; 393 394 int nfs42_proc_layoutstats_generic(struct nfs_server *server, 395 struct nfs42_layoutstat_data *data) 396 { 397 struct rpc_message msg = { 398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], 399 .rpc_argp = &data->args, 400 .rpc_resp = &data->res, 401 }; 402 struct rpc_task_setup task_setup = { 403 .rpc_client = server->client, 404 .rpc_message = &msg, 405 .callback_ops = &nfs42_layoutstat_ops, 406 .callback_data = data, 407 .flags = RPC_TASK_ASYNC, 408 }; 409 struct rpc_task *task; 410 411 data->inode = nfs_igrab_and_active(data->args.inode); 412 if (!data->inode) { 413 nfs42_layoutstat_release(data); 414 return -EAGAIN; 415 } 416 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 417 task = rpc_run_task(&task_setup); 418 if (IS_ERR(task)) 419 return PTR_ERR(task); 420 return 0; 421 } 422 423 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, 424 struct file *dst_f, struct nfs_lock_context *src_lock, 425 struct nfs_lock_context *dst_lock, loff_t src_offset, 426 loff_t dst_offset, loff_t count) 427 { 428 struct inode *src_inode = file_inode(src_f); 429 struct inode *dst_inode = file_inode(dst_f); 430 struct nfs_server *server = NFS_SERVER(dst_inode); 431 struct nfs42_clone_args args = { 432 .src_fh = NFS_FH(src_inode), 433 .dst_fh = NFS_FH(dst_inode), 434 .src_offset = src_offset, 435 .dst_offset = dst_offset, 436 .count = count, 437 .dst_bitmask = server->cache_consistency_bitmask, 438 }; 439 struct nfs42_clone_res res = { 440 .server = server, 441 }; 442 int status; 443 444 msg->rpc_argp = &args; 445 msg->rpc_resp = &res; 446 447 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, 448 src_lock, FMODE_READ); 449 if (status) 450 return status; 451 452 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, 453 dst_lock, FMODE_WRITE); 454 if (status) 455 return status; 456 457 res.dst_fattr = nfs_alloc_fattr(); 458 if (!res.dst_fattr) 459 return -ENOMEM; 460 461 status = nfs4_call_sync(server->client, server, msg, 462 &args.seq_args, &res.seq_res, 0); 463 if (status == 0) 464 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); 465 466 kfree(res.dst_fattr); 467 return status; 468 } 469 470 int nfs42_proc_clone(struct file *src_f, struct file *dst_f, 471 loff_t src_offset, loff_t dst_offset, loff_t count) 472 { 473 struct rpc_message msg = { 474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], 475 }; 476 struct inode *inode = file_inode(src_f); 477 struct nfs_server *server = NFS_SERVER(file_inode(src_f)); 478 struct nfs_lock_context *src_lock; 479 struct nfs_lock_context *dst_lock; 480 struct nfs4_exception src_exception = { }; 481 struct nfs4_exception dst_exception = { }; 482 int err, err2; 483 484 if (!nfs_server_capable(inode, NFS_CAP_CLONE)) 485 return -EOPNOTSUPP; 486 487 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); 488 if (IS_ERR(src_lock)) 489 return PTR_ERR(src_lock); 490 491 src_exception.inode = file_inode(src_f); 492 src_exception.state = src_lock->open_context->state; 493 494 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); 495 if (IS_ERR(dst_lock)) { 496 err = PTR_ERR(dst_lock); 497 goto out_put_src_lock; 498 } 499 500 dst_exception.inode = file_inode(dst_f); 501 dst_exception.state = dst_lock->open_context->state; 502 503 do { 504 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, 505 src_offset, dst_offset, count); 506 if (err == -ENOTSUPP || err == -EOPNOTSUPP) { 507 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; 508 err = -EOPNOTSUPP; 509 break; 510 } 511 512 err2 = nfs4_handle_exception(server, err, &src_exception); 513 err = nfs4_handle_exception(server, err, &dst_exception); 514 if (!err) 515 err = err2; 516 } while (src_exception.retry || dst_exception.retry); 517 518 nfs_put_lock_context(dst_lock); 519 out_put_src_lock: 520 nfs_put_lock_context(src_lock); 521 return err; 522 } 523