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 nfs_wb_all(inode); 117 inode_lock(inode); 118 119 err = nfs42_proc_fallocate(&msg, filep, offset, len); 120 if (err == 0) 121 truncate_pagecache_range(inode, offset, (offset + len) -1); 122 if (err == -EOPNOTSUPP) 123 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; 124 125 inode_unlock(inode); 126 return err; 127 } 128 129 static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src, 130 struct nfs_lock_context *src_lock, 131 struct file *dst, loff_t pos_dst, 132 struct nfs_lock_context *dst_lock, 133 size_t count) 134 { 135 struct nfs42_copy_args args = { 136 .src_fh = NFS_FH(file_inode(src)), 137 .src_pos = pos_src, 138 .dst_fh = NFS_FH(file_inode(dst)), 139 .dst_pos = pos_dst, 140 .count = count, 141 }; 142 struct nfs42_copy_res res; 143 struct rpc_message msg = { 144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY], 145 .rpc_argp = &args, 146 .rpc_resp = &res, 147 }; 148 struct inode *dst_inode = file_inode(dst); 149 struct nfs_server *server = NFS_SERVER(dst_inode); 150 int status; 151 152 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, 153 src_lock, FMODE_READ); 154 if (status) 155 return status; 156 157 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, 158 dst_lock, FMODE_WRITE); 159 if (status) 160 return status; 161 162 status = nfs4_call_sync(server->client, server, &msg, 163 &args.seq_args, &res.seq_res, 0); 164 if (status == -ENOTSUPP) 165 server->caps &= ~NFS_CAP_COPY; 166 if (status) 167 return status; 168 169 if (res.write_res.verifier.committed != NFS_FILE_SYNC) { 170 status = nfs_commit_file(dst, &res.write_res.verifier.verifier); 171 if (status) 172 return status; 173 } 174 175 truncate_pagecache_range(dst_inode, pos_dst, 176 pos_dst + res.write_res.count); 177 178 return res.write_res.count; 179 } 180 181 ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src, 182 struct file *dst, loff_t pos_dst, 183 size_t count) 184 { 185 struct nfs_server *server = NFS_SERVER(file_inode(dst)); 186 struct nfs_lock_context *src_lock; 187 struct nfs_lock_context *dst_lock; 188 struct nfs4_exception src_exception = { }; 189 struct nfs4_exception dst_exception = { }; 190 ssize_t err, err2; 191 192 if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY)) 193 return -EOPNOTSUPP; 194 195 src_lock = nfs_get_lock_context(nfs_file_open_context(src)); 196 if (IS_ERR(src_lock)) 197 return PTR_ERR(src_lock); 198 199 src_exception.inode = file_inode(src); 200 src_exception.state = src_lock->open_context->state; 201 202 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst)); 203 if (IS_ERR(dst_lock)) { 204 err = PTR_ERR(dst_lock); 205 goto out_put_src_lock; 206 } 207 208 dst_exception.inode = file_inode(dst); 209 dst_exception.state = dst_lock->open_context->state; 210 211 do { 212 inode_lock(file_inode(dst)); 213 err = _nfs42_proc_copy(src, pos_src, src_lock, 214 dst, pos_dst, dst_lock, count); 215 inode_unlock(file_inode(dst)); 216 217 if (err == -ENOTSUPP) { 218 err = -EOPNOTSUPP; 219 break; 220 } 221 222 err2 = nfs4_handle_exception(server, err, &src_exception); 223 err = nfs4_handle_exception(server, err, &dst_exception); 224 if (!err) 225 err = err2; 226 } while (src_exception.retry || dst_exception.retry); 227 228 nfs_put_lock_context(dst_lock); 229 out_put_src_lock: 230 nfs_put_lock_context(src_lock); 231 return err; 232 } 233 234 static loff_t _nfs42_proc_llseek(struct file *filep, 235 struct nfs_lock_context *lock, loff_t offset, int whence) 236 { 237 struct inode *inode = file_inode(filep); 238 struct nfs42_seek_args args = { 239 .sa_fh = NFS_FH(inode), 240 .sa_offset = offset, 241 .sa_what = (whence == SEEK_HOLE) ? 242 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, 243 }; 244 struct nfs42_seek_res res; 245 struct rpc_message msg = { 246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], 247 .rpc_argp = &args, 248 .rpc_resp = &res, 249 }; 250 struct nfs_server *server = NFS_SERVER(inode); 251 int status; 252 253 if (!nfs_server_capable(inode, NFS_CAP_SEEK)) 254 return -ENOTSUPP; 255 256 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, 257 lock, FMODE_READ); 258 if (status) 259 return status; 260 261 nfs_wb_all(inode); 262 status = nfs4_call_sync(server->client, server, &msg, 263 &args.seq_args, &res.seq_res, 0); 264 if (status == -ENOTSUPP) 265 server->caps &= ~NFS_CAP_SEEK; 266 if (status) 267 return status; 268 269 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); 270 } 271 272 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) 273 { 274 struct nfs_server *server = NFS_SERVER(file_inode(filep)); 275 struct nfs4_exception exception = { }; 276 struct nfs_lock_context *lock; 277 loff_t err; 278 279 lock = nfs_get_lock_context(nfs_file_open_context(filep)); 280 if (IS_ERR(lock)) 281 return PTR_ERR(lock); 282 283 exception.inode = file_inode(filep); 284 exception.state = lock->open_context->state; 285 286 do { 287 err = _nfs42_proc_llseek(filep, lock, offset, whence); 288 if (err >= 0) 289 break; 290 if (err == -ENOTSUPP) { 291 err = -EOPNOTSUPP; 292 break; 293 } 294 err = nfs4_handle_exception(server, err, &exception); 295 } while (exception.retry); 296 297 nfs_put_lock_context(lock); 298 return err; 299 } 300 301 302 static void 303 nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) 304 { 305 struct nfs42_layoutstat_data *data = calldata; 306 struct nfs_server *server = NFS_SERVER(data->args.inode); 307 308 nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args, 309 &data->res.seq_res, task); 310 } 311 312 static void 313 nfs42_layoutstat_done(struct rpc_task *task, void *calldata) 314 { 315 struct nfs42_layoutstat_data *data = calldata; 316 struct inode *inode = data->inode; 317 struct pnfs_layout_hdr *lo; 318 319 if (!nfs4_sequence_done(task, &data->res.seq_res)) 320 return; 321 322 switch (task->tk_status) { 323 case 0: 324 break; 325 case -NFS4ERR_EXPIRED: 326 case -NFS4ERR_STALE_STATEID: 327 case -NFS4ERR_OLD_STATEID: 328 case -NFS4ERR_BAD_STATEID: 329 spin_lock(&inode->i_lock); 330 lo = NFS_I(inode)->layout; 331 if (lo && nfs4_stateid_match(&data->args.stateid, 332 &lo->plh_stateid)) { 333 LIST_HEAD(head); 334 335 /* 336 * Mark the bad layout state as invalid, then retry 337 * with the current stateid. 338 */ 339 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); 340 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0); 341 spin_unlock(&inode->i_lock); 342 pnfs_free_lseg_list(&head); 343 } else 344 spin_unlock(&inode->i_lock); 345 break; 346 case -ENOTSUPP: 347 case -EOPNOTSUPP: 348 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; 349 default: 350 break; 351 } 352 353 dprintk("%s server returns %d\n", __func__, task->tk_status); 354 } 355 356 static void 357 nfs42_layoutstat_release(void *calldata) 358 { 359 struct nfs42_layoutstat_data *data = calldata; 360 struct nfs_server *nfss = NFS_SERVER(data->args.inode); 361 362 if (nfss->pnfs_curr_ld->cleanup_layoutstats) 363 nfss->pnfs_curr_ld->cleanup_layoutstats(data); 364 365 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); 366 smp_mb__before_atomic(); 367 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); 368 smp_mb__after_atomic(); 369 nfs_iput_and_deactive(data->inode); 370 kfree(data->args.devinfo); 371 kfree(data); 372 } 373 374 static const struct rpc_call_ops nfs42_layoutstat_ops = { 375 .rpc_call_prepare = nfs42_layoutstat_prepare, 376 .rpc_call_done = nfs42_layoutstat_done, 377 .rpc_release = nfs42_layoutstat_release, 378 }; 379 380 int nfs42_proc_layoutstats_generic(struct nfs_server *server, 381 struct nfs42_layoutstat_data *data) 382 { 383 struct rpc_message msg = { 384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], 385 .rpc_argp = &data->args, 386 .rpc_resp = &data->res, 387 }; 388 struct rpc_task_setup task_setup = { 389 .rpc_client = server->client, 390 .rpc_message = &msg, 391 .callback_ops = &nfs42_layoutstat_ops, 392 .callback_data = data, 393 .flags = RPC_TASK_ASYNC, 394 }; 395 struct rpc_task *task; 396 397 data->inode = nfs_igrab_and_active(data->args.inode); 398 if (!data->inode) { 399 nfs42_layoutstat_release(data); 400 return -EAGAIN; 401 } 402 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 403 task = rpc_run_task(&task_setup); 404 if (IS_ERR(task)) 405 return PTR_ERR(task); 406 return 0; 407 } 408 409 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, 410 struct file *dst_f, struct nfs_lock_context *src_lock, 411 struct nfs_lock_context *dst_lock, loff_t src_offset, 412 loff_t dst_offset, loff_t count) 413 { 414 struct inode *src_inode = file_inode(src_f); 415 struct inode *dst_inode = file_inode(dst_f); 416 struct nfs_server *server = NFS_SERVER(dst_inode); 417 struct nfs42_clone_args args = { 418 .src_fh = NFS_FH(src_inode), 419 .dst_fh = NFS_FH(dst_inode), 420 .src_offset = src_offset, 421 .dst_offset = dst_offset, 422 .count = count, 423 .dst_bitmask = server->cache_consistency_bitmask, 424 }; 425 struct nfs42_clone_res res = { 426 .server = server, 427 }; 428 int status; 429 430 msg->rpc_argp = &args; 431 msg->rpc_resp = &res; 432 433 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, 434 src_lock, FMODE_READ); 435 if (status) 436 return status; 437 438 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, 439 dst_lock, FMODE_WRITE); 440 if (status) 441 return status; 442 443 res.dst_fattr = nfs_alloc_fattr(); 444 if (!res.dst_fattr) 445 return -ENOMEM; 446 447 status = nfs4_call_sync(server->client, server, msg, 448 &args.seq_args, &res.seq_res, 0); 449 if (status == 0) 450 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); 451 452 kfree(res.dst_fattr); 453 return status; 454 } 455 456 int nfs42_proc_clone(struct file *src_f, struct file *dst_f, 457 loff_t src_offset, loff_t dst_offset, loff_t count) 458 { 459 struct rpc_message msg = { 460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], 461 }; 462 struct inode *inode = file_inode(src_f); 463 struct nfs_server *server = NFS_SERVER(file_inode(src_f)); 464 struct nfs_lock_context *src_lock; 465 struct nfs_lock_context *dst_lock; 466 struct nfs4_exception src_exception = { }; 467 struct nfs4_exception dst_exception = { }; 468 int err, err2; 469 470 if (!nfs_server_capable(inode, NFS_CAP_CLONE)) 471 return -EOPNOTSUPP; 472 473 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); 474 if (IS_ERR(src_lock)) 475 return PTR_ERR(src_lock); 476 477 src_exception.inode = file_inode(src_f); 478 src_exception.state = src_lock->open_context->state; 479 480 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); 481 if (IS_ERR(dst_lock)) { 482 err = PTR_ERR(dst_lock); 483 goto out_put_src_lock; 484 } 485 486 dst_exception.inode = file_inode(dst_f); 487 dst_exception.state = dst_lock->open_context->state; 488 489 do { 490 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, 491 src_offset, dst_offset, count); 492 if (err == -ENOTSUPP || err == -EOPNOTSUPP) { 493 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; 494 err = -EOPNOTSUPP; 495 break; 496 } 497 498 err2 = nfs4_handle_exception(server, err, &src_exception); 499 err = nfs4_handle_exception(server, err, &dst_exception); 500 if (!err) 501 err = err2; 502 } while (src_exception.retry || dst_exception.retry); 503 504 nfs_put_lock_context(dst_lock); 505 out_put_src_lock: 506 nfs_put_lock_context(src_lock); 507 return err; 508 } 509