11c6dcbe5SAnna Schumaker /* 21c6dcbe5SAnna Schumaker * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> 31c6dcbe5SAnna Schumaker */ 41c6dcbe5SAnna Schumaker #include <linux/fs.h> 51c6dcbe5SAnna Schumaker #include <linux/sunrpc/sched.h> 61c6dcbe5SAnna Schumaker #include <linux/nfs.h> 71c6dcbe5SAnna Schumaker #include <linux/nfs3.h> 81c6dcbe5SAnna Schumaker #include <linux/nfs4.h> 91c6dcbe5SAnna Schumaker #include <linux/nfs_xdr.h> 101c6dcbe5SAnna Schumaker #include <linux/nfs_fs.h> 111c6dcbe5SAnna Schumaker #include "nfs4_fs.h" 121c6dcbe5SAnna Schumaker #include "nfs42.h" 131b4a4bd8SPeng Tao #include "iostat.h" 141b4a4bd8SPeng Tao #include "pnfs.h" 151b4a4bd8SPeng Tao #include "internal.h" 161b4a4bd8SPeng Tao 17291e1b94SAnna Schumaker #define NFSDBG_FACILITY NFSDBG_PROC 181c6dcbe5SAnna Schumaker 191c6dcbe5SAnna Schumaker static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file, 201c6dcbe5SAnna Schumaker fmode_t fmode) 211c6dcbe5SAnna Schumaker { 221c6dcbe5SAnna Schumaker struct nfs_open_context *open; 231c6dcbe5SAnna Schumaker struct nfs_lock_context *lock; 241c6dcbe5SAnna Schumaker int ret; 251c6dcbe5SAnna Schumaker 261c6dcbe5SAnna Schumaker open = get_nfs_open_context(nfs_file_open_context(file)); 271c6dcbe5SAnna Schumaker lock = nfs_get_lock_context(open); 281c6dcbe5SAnna Schumaker if (IS_ERR(lock)) { 291c6dcbe5SAnna Schumaker put_nfs_open_context(open); 301c6dcbe5SAnna Schumaker return PTR_ERR(lock); 311c6dcbe5SAnna Schumaker } 321c6dcbe5SAnna Schumaker 331c6dcbe5SAnna Schumaker ret = nfs4_set_rw_stateid(dst, open, lock, fmode); 341c6dcbe5SAnna Schumaker 351c6dcbe5SAnna Schumaker nfs_put_lock_context(lock); 361c6dcbe5SAnna Schumaker put_nfs_open_context(open); 371c6dcbe5SAnna Schumaker return ret; 381c6dcbe5SAnna Schumaker } 391c6dcbe5SAnna Schumaker 40f4ac1674SAnna Schumaker static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, 41f4ac1674SAnna Schumaker loff_t offset, loff_t len) 42f4ac1674SAnna Schumaker { 43f4ac1674SAnna Schumaker struct inode *inode = file_inode(filep); 449a51940bSAnna Schumaker struct nfs_server *server = NFS_SERVER(inode); 45f4ac1674SAnna Schumaker struct nfs42_falloc_args args = { 46f4ac1674SAnna Schumaker .falloc_fh = NFS_FH(inode), 47f4ac1674SAnna Schumaker .falloc_offset = offset, 48f4ac1674SAnna Schumaker .falloc_length = len, 499a51940bSAnna Schumaker .falloc_bitmask = server->cache_consistency_bitmask, 50f4ac1674SAnna Schumaker }; 519a51940bSAnna Schumaker struct nfs42_falloc_res res = { 529a51940bSAnna Schumaker .falloc_server = server, 539a51940bSAnna Schumaker }; 54f4ac1674SAnna Schumaker int status; 55f4ac1674SAnna Schumaker 56f4ac1674SAnna Schumaker msg->rpc_argp = &args; 57f4ac1674SAnna Schumaker msg->rpc_resp = &res; 58f4ac1674SAnna Schumaker 59f4ac1674SAnna Schumaker status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE); 60f4ac1674SAnna Schumaker if (status) 61f4ac1674SAnna Schumaker return status; 62f4ac1674SAnna Schumaker 639a51940bSAnna Schumaker res.falloc_fattr = nfs_alloc_fattr(); 649a51940bSAnna Schumaker if (!res.falloc_fattr) 659a51940bSAnna Schumaker return -ENOMEM; 669a51940bSAnna Schumaker 679a51940bSAnna Schumaker status = nfs4_call_sync(server->client, server, msg, 68f4ac1674SAnna Schumaker &args.seq_args, &res.seq_res, 0); 699a51940bSAnna Schumaker if (status == 0) 709a51940bSAnna Schumaker status = nfs_post_op_update_inode(inode, res.falloc_fattr); 719a51940bSAnna Schumaker 729a51940bSAnna Schumaker kfree(res.falloc_fattr); 739a51940bSAnna Schumaker return status; 74f4ac1674SAnna Schumaker } 75f4ac1674SAnna Schumaker 76f4ac1674SAnna Schumaker static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, 77f4ac1674SAnna Schumaker loff_t offset, loff_t len) 78f4ac1674SAnna Schumaker { 79f4ac1674SAnna Schumaker struct nfs_server *server = NFS_SERVER(file_inode(filep)); 80f4ac1674SAnna Schumaker struct nfs4_exception exception = { }; 81f4ac1674SAnna Schumaker int err; 82f4ac1674SAnna Schumaker 83f4ac1674SAnna Schumaker do { 84f4ac1674SAnna Schumaker err = _nfs42_proc_fallocate(msg, filep, offset, len); 85f4ac1674SAnna Schumaker if (err == -ENOTSUPP) 86f4ac1674SAnna Schumaker return -EOPNOTSUPP; 87f4ac1674SAnna Schumaker err = nfs4_handle_exception(server, err, &exception); 88f4ac1674SAnna Schumaker } while (exception.retry); 89f4ac1674SAnna Schumaker 90f4ac1674SAnna Schumaker return err; 91f4ac1674SAnna Schumaker } 92f4ac1674SAnna Schumaker 93f4ac1674SAnna Schumaker int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) 94f4ac1674SAnna Schumaker { 95f4ac1674SAnna Schumaker struct rpc_message msg = { 96f4ac1674SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], 97f4ac1674SAnna Schumaker }; 98f4ac1674SAnna Schumaker struct inode *inode = file_inode(filep); 99f4ac1674SAnna Schumaker int err; 100f4ac1674SAnna Schumaker 101f4ac1674SAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) 102f4ac1674SAnna Schumaker return -EOPNOTSUPP; 103f4ac1674SAnna Schumaker 104f830f7ddSAnna Schumaker mutex_lock(&inode->i_mutex); 105f830f7ddSAnna Schumaker 106f4ac1674SAnna Schumaker err = nfs42_proc_fallocate(&msg, filep, offset, len); 107f4ac1674SAnna Schumaker if (err == -EOPNOTSUPP) 108f4ac1674SAnna Schumaker NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; 109f830f7ddSAnna Schumaker 110f830f7ddSAnna Schumaker mutex_unlock(&inode->i_mutex); 111f4ac1674SAnna Schumaker return err; 112f4ac1674SAnna Schumaker } 113f4ac1674SAnna Schumaker 114624bd5b7SAnna Schumaker int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) 115624bd5b7SAnna Schumaker { 116624bd5b7SAnna Schumaker struct rpc_message msg = { 117624bd5b7SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], 118624bd5b7SAnna Schumaker }; 119624bd5b7SAnna Schumaker struct inode *inode = file_inode(filep); 120624bd5b7SAnna Schumaker int err; 121624bd5b7SAnna Schumaker 122624bd5b7SAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) 123624bd5b7SAnna Schumaker return -EOPNOTSUPP; 124624bd5b7SAnna Schumaker 1259a51940bSAnna Schumaker nfs_wb_all(inode); 126f830f7ddSAnna Schumaker mutex_lock(&inode->i_mutex); 127f830f7ddSAnna Schumaker 128624bd5b7SAnna Schumaker err = nfs42_proc_fallocate(&msg, filep, offset, len); 1299a51940bSAnna Schumaker if (err == 0) 1309a51940bSAnna Schumaker truncate_pagecache_range(inode, offset, (offset + len) -1); 131624bd5b7SAnna Schumaker if (err == -EOPNOTSUPP) 132624bd5b7SAnna Schumaker NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; 133f830f7ddSAnna Schumaker 134f830f7ddSAnna Schumaker mutex_unlock(&inode->i_mutex); 135624bd5b7SAnna Schumaker return err; 136624bd5b7SAnna Schumaker } 137624bd5b7SAnna Schumaker 138bdcc2cd1SJ. Bruce Fields static loff_t _nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) 1391c6dcbe5SAnna Schumaker { 1401c6dcbe5SAnna Schumaker struct inode *inode = file_inode(filep); 1411c6dcbe5SAnna Schumaker struct nfs42_seek_args args = { 1421c6dcbe5SAnna Schumaker .sa_fh = NFS_FH(inode), 1431c6dcbe5SAnna Schumaker .sa_offset = offset, 1441c6dcbe5SAnna Schumaker .sa_what = (whence == SEEK_HOLE) ? 1451c6dcbe5SAnna Schumaker NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, 1461c6dcbe5SAnna Schumaker }; 1471c6dcbe5SAnna Schumaker struct nfs42_seek_res res; 1481c6dcbe5SAnna Schumaker struct rpc_message msg = { 1491c6dcbe5SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], 1501c6dcbe5SAnna Schumaker .rpc_argp = &args, 1511c6dcbe5SAnna Schumaker .rpc_resp = &res, 1521c6dcbe5SAnna Schumaker }; 1531c6dcbe5SAnna Schumaker struct nfs_server *server = NFS_SERVER(inode); 1541c6dcbe5SAnna Schumaker int status; 1551c6dcbe5SAnna Schumaker 156878ffa9fSAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_SEEK)) 1571c6dcbe5SAnna Schumaker return -ENOTSUPP; 1581c6dcbe5SAnna Schumaker 1591c6dcbe5SAnna Schumaker status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ); 1601c6dcbe5SAnna Schumaker if (status) 1611c6dcbe5SAnna Schumaker return status; 1621c6dcbe5SAnna Schumaker 1631c6dcbe5SAnna Schumaker nfs_wb_all(inode); 1641c6dcbe5SAnna Schumaker status = nfs4_call_sync(server->client, server, &msg, 1651c6dcbe5SAnna Schumaker &args.seq_args, &res.seq_res, 0); 1661c6dcbe5SAnna Schumaker if (status == -ENOTSUPP) 1671c6dcbe5SAnna Schumaker server->caps &= ~NFS_CAP_SEEK; 1681c6dcbe5SAnna Schumaker if (status) 1691c6dcbe5SAnna Schumaker return status; 1701c6dcbe5SAnna Schumaker 1711c6dcbe5SAnna Schumaker return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); 1721c6dcbe5SAnna Schumaker } 173be3a5d23STrond Myklebust 174bdcc2cd1SJ. Bruce Fields loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) 175bdcc2cd1SJ. Bruce Fields { 176bdcc2cd1SJ. Bruce Fields struct nfs_server *server = NFS_SERVER(file_inode(filep)); 177bdcc2cd1SJ. Bruce Fields struct nfs4_exception exception = { }; 178306a5549SJ. Bruce Fields loff_t err; 179bdcc2cd1SJ. Bruce Fields 180bdcc2cd1SJ. Bruce Fields do { 181bdcc2cd1SJ. Bruce Fields err = _nfs42_proc_llseek(filep, offset, whence); 182306a5549SJ. Bruce Fields if (err >= 0) 183306a5549SJ. Bruce Fields break; 184bdcc2cd1SJ. Bruce Fields if (err == -ENOTSUPP) 185bdcc2cd1SJ. Bruce Fields return -EOPNOTSUPP; 186bdcc2cd1SJ. Bruce Fields err = nfs4_handle_exception(server, err, &exception); 187bdcc2cd1SJ. Bruce Fields } while (exception.retry); 188bdcc2cd1SJ. Bruce Fields 189bdcc2cd1SJ. Bruce Fields return err; 190bdcc2cd1SJ. Bruce Fields } 191bdcc2cd1SJ. Bruce Fields 192bdcc2cd1SJ. Bruce Fields 1931b4a4bd8SPeng Tao static void 1941b4a4bd8SPeng Tao nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) 1951b4a4bd8SPeng Tao { 1961b4a4bd8SPeng Tao struct nfs42_layoutstat_data *data = calldata; 1971b4a4bd8SPeng Tao struct nfs_server *server = NFS_SERVER(data->args.inode); 1981b4a4bd8SPeng Tao 1991b4a4bd8SPeng Tao nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args, 2001b4a4bd8SPeng Tao &data->res.seq_res, task); 2011b4a4bd8SPeng Tao } 2021b4a4bd8SPeng Tao 2031b4a4bd8SPeng Tao static void 2041b4a4bd8SPeng Tao nfs42_layoutstat_done(struct rpc_task *task, void *calldata) 2051b4a4bd8SPeng Tao { 2061b4a4bd8SPeng Tao struct nfs42_layoutstat_data *data = calldata; 20768d264cfSPeng Tao struct inode *inode = data->inode; 20868d264cfSPeng Tao struct pnfs_layout_hdr *lo; 2091b4a4bd8SPeng Tao 2101b4a4bd8SPeng Tao if (!nfs4_sequence_done(task, &data->res.seq_res)) 2111b4a4bd8SPeng Tao return; 2121b4a4bd8SPeng Tao 2136c5a0d89STrond Myklebust switch (task->tk_status) { 2146c5a0d89STrond Myklebust case 0: 2156c5a0d89STrond Myklebust break; 21668d264cfSPeng Tao case -NFS4ERR_EXPIRED: 21768d264cfSPeng Tao case -NFS4ERR_STALE_STATEID: 21868d264cfSPeng Tao case -NFS4ERR_OLD_STATEID: 21968d264cfSPeng Tao case -NFS4ERR_BAD_STATEID: 22068d264cfSPeng Tao spin_lock(&inode->i_lock); 22168d264cfSPeng Tao lo = NFS_I(inode)->layout; 22268d264cfSPeng Tao if (lo && nfs4_stateid_match(&data->args.stateid, 22368d264cfSPeng Tao &lo->plh_stateid)) { 22468d264cfSPeng Tao LIST_HEAD(head); 22568d264cfSPeng Tao 22668d264cfSPeng Tao /* 22768d264cfSPeng Tao * Mark the bad layout state as invalid, then retry 22868d264cfSPeng Tao * with the current stateid. 22968d264cfSPeng Tao */ 23068d264cfSPeng Tao set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); 23168d264cfSPeng Tao pnfs_mark_matching_lsegs_invalid(lo, &head, NULL); 23268d264cfSPeng Tao spin_unlock(&inode->i_lock); 23368d264cfSPeng Tao pnfs_free_lseg_list(&head); 23468d264cfSPeng Tao } else 23568d264cfSPeng Tao spin_unlock(&inode->i_lock); 23668d264cfSPeng Tao break; 2376c5a0d89STrond Myklebust case -ENOTSUPP: 2386c5a0d89STrond Myklebust case -EOPNOTSUPP: 23968d264cfSPeng Tao NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; 2406c5a0d89STrond Myklebust default: 24168d264cfSPeng Tao break; 2421b4a4bd8SPeng Tao } 24368d264cfSPeng Tao 24468d264cfSPeng Tao dprintk("%s server returns %d\n", __func__, task->tk_status); 2456c5a0d89STrond Myklebust } 2461b4a4bd8SPeng Tao 2471b4a4bd8SPeng Tao static void 2481b4a4bd8SPeng Tao nfs42_layoutstat_release(void *calldata) 2491b4a4bd8SPeng Tao { 2501b4a4bd8SPeng Tao struct nfs42_layoutstat_data *data = calldata; 2518733408dSPeng Tao struct nfs_server *nfss = NFS_SERVER(data->args.inode); 2528733408dSPeng Tao 2538733408dSPeng Tao if (nfss->pnfs_curr_ld->cleanup_layoutstats) 2548733408dSPeng Tao nfss->pnfs_curr_ld->cleanup_layoutstats(data); 2551b4a4bd8SPeng Tao 2561b4a4bd8SPeng Tao pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); 2571bfe3b25SPeng Tao smp_mb__before_atomic(); 2581bfe3b25SPeng Tao clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); 2591bfe3b25SPeng Tao smp_mb__after_atomic(); 2601b4a4bd8SPeng Tao nfs_iput_and_deactive(data->inode); 2611b4a4bd8SPeng Tao kfree(data->args.devinfo); 2621b4a4bd8SPeng Tao kfree(data); 2631b4a4bd8SPeng Tao } 2641b4a4bd8SPeng Tao 265be3a5d23STrond Myklebust static const struct rpc_call_ops nfs42_layoutstat_ops = { 2661b4a4bd8SPeng Tao .rpc_call_prepare = nfs42_layoutstat_prepare, 2671b4a4bd8SPeng Tao .rpc_call_done = nfs42_layoutstat_done, 2681b4a4bd8SPeng Tao .rpc_release = nfs42_layoutstat_release, 269be3a5d23STrond Myklebust }; 270be3a5d23STrond Myklebust 271be3a5d23STrond Myklebust int nfs42_proc_layoutstats_generic(struct nfs_server *server, 272be3a5d23STrond Myklebust struct nfs42_layoutstat_data *data) 273be3a5d23STrond Myklebust { 274be3a5d23STrond Myklebust struct rpc_message msg = { 275be3a5d23STrond Myklebust .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], 276be3a5d23STrond Myklebust .rpc_argp = &data->args, 277be3a5d23STrond Myklebust .rpc_resp = &data->res, 278be3a5d23STrond Myklebust }; 279be3a5d23STrond Myklebust struct rpc_task_setup task_setup = { 280be3a5d23STrond Myklebust .rpc_client = server->client, 281be3a5d23STrond Myklebust .rpc_message = &msg, 282be3a5d23STrond Myklebust .callback_ops = &nfs42_layoutstat_ops, 283be3a5d23STrond Myklebust .callback_data = data, 284be3a5d23STrond Myklebust .flags = RPC_TASK_ASYNC, 285be3a5d23STrond Myklebust }; 286be3a5d23STrond Myklebust struct rpc_task *task; 287be3a5d23STrond Myklebust 2881b4a4bd8SPeng Tao data->inode = nfs_igrab_and_active(data->args.inode); 2891b4a4bd8SPeng Tao if (!data->inode) { 2901b4a4bd8SPeng Tao nfs42_layoutstat_release(data); 2911b4a4bd8SPeng Tao return -EAGAIN; 2921b4a4bd8SPeng Tao } 293be3a5d23STrond Myklebust nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 294be3a5d23STrond Myklebust task = rpc_run_task(&task_setup); 295be3a5d23STrond Myklebust if (IS_ERR(task)) 296be3a5d23STrond Myklebust return PTR_ERR(task); 297be3a5d23STrond Myklebust return 0; 298be3a5d23STrond Myklebust } 299e5341f3aSPeng Tao 300e5341f3aSPeng Tao static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, 301e5341f3aSPeng Tao struct file *dst_f, loff_t src_offset, 302e5341f3aSPeng Tao loff_t dst_offset, loff_t count) 303e5341f3aSPeng Tao { 304e5341f3aSPeng Tao struct inode *src_inode = file_inode(src_f); 305e5341f3aSPeng Tao struct inode *dst_inode = file_inode(dst_f); 306e5341f3aSPeng Tao struct nfs_server *server = NFS_SERVER(dst_inode); 307e5341f3aSPeng Tao struct nfs42_clone_args args = { 308e5341f3aSPeng Tao .src_fh = NFS_FH(src_inode), 309e5341f3aSPeng Tao .dst_fh = NFS_FH(dst_inode), 310e5341f3aSPeng Tao .src_offset = src_offset, 311e5341f3aSPeng Tao .dst_offset = dst_offset, 3129494b2ceSChristoph Hellwig .count = count, 313e5341f3aSPeng Tao .dst_bitmask = server->cache_consistency_bitmask, 314e5341f3aSPeng Tao }; 315e5341f3aSPeng Tao struct nfs42_clone_res res = { 316e5341f3aSPeng Tao .server = server, 317e5341f3aSPeng Tao }; 318e5341f3aSPeng Tao int status; 319e5341f3aSPeng Tao 320e5341f3aSPeng Tao msg->rpc_argp = &args; 321e5341f3aSPeng Tao msg->rpc_resp = &res; 322e5341f3aSPeng Tao 323e5341f3aSPeng Tao status = nfs42_set_rw_stateid(&args.src_stateid, src_f, FMODE_READ); 324e5341f3aSPeng Tao if (status) 325e5341f3aSPeng Tao return status; 326e5341f3aSPeng Tao 327e5341f3aSPeng Tao status = nfs42_set_rw_stateid(&args.dst_stateid, dst_f, FMODE_WRITE); 328e5341f3aSPeng Tao if (status) 329e5341f3aSPeng Tao return status; 330e5341f3aSPeng Tao 331e5341f3aSPeng Tao res.dst_fattr = nfs_alloc_fattr(); 332e5341f3aSPeng Tao if (!res.dst_fattr) 333e5341f3aSPeng Tao return -ENOMEM; 334e5341f3aSPeng Tao 335e5341f3aSPeng Tao status = nfs4_call_sync(server->client, server, msg, 336e5341f3aSPeng Tao &args.seq_args, &res.seq_res, 0); 337e5341f3aSPeng Tao if (status == 0) 338e5341f3aSPeng Tao status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); 339e5341f3aSPeng Tao 340e5341f3aSPeng Tao kfree(res.dst_fattr); 341e5341f3aSPeng Tao return status; 342e5341f3aSPeng Tao } 343e5341f3aSPeng Tao 344e5341f3aSPeng Tao int nfs42_proc_clone(struct file *src_f, struct file *dst_f, 345e5341f3aSPeng Tao loff_t src_offset, loff_t dst_offset, loff_t count) 346e5341f3aSPeng Tao { 347e5341f3aSPeng Tao struct rpc_message msg = { 348e5341f3aSPeng Tao .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], 349e5341f3aSPeng Tao }; 350e5341f3aSPeng Tao struct inode *inode = file_inode(src_f); 351e5341f3aSPeng Tao struct nfs_server *server = NFS_SERVER(file_inode(src_f)); 352e5341f3aSPeng Tao struct nfs4_exception exception = { }; 353e5341f3aSPeng Tao int err; 354e5341f3aSPeng Tao 355e5341f3aSPeng Tao if (!nfs_server_capable(inode, NFS_CAP_CLONE)) 356e5341f3aSPeng Tao return -EOPNOTSUPP; 357e5341f3aSPeng Tao 358e5341f3aSPeng Tao do { 359e5341f3aSPeng Tao err = _nfs42_proc_clone(&msg, src_f, dst_f, src_offset, 360e5341f3aSPeng Tao dst_offset, count); 361e5341f3aSPeng Tao if (err == -ENOTSUPP || err == -EOPNOTSUPP) { 362e5341f3aSPeng Tao NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; 363e5341f3aSPeng Tao return -EOPNOTSUPP; 364e5341f3aSPeng Tao } 365e5341f3aSPeng Tao err = nfs4_handle_exception(server, err, &exception); 366e5341f3aSPeng Tao } while (exception.retry); 367e5341f3aSPeng Tao 368e5341f3aSPeng Tao return err; 369e5341f3aSPeng Tao 370e5341f3aSPeng Tao } 371