fs/nfs/nfs42proc.c

   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 }