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 19f4ac1674SAnna Schumaker static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, 204bdf87ebSChristoph Hellwig struct nfs_lock_context *lock, loff_t offset, loff_t len) 21f4ac1674SAnna Schumaker { 22f4ac1674SAnna Schumaker struct inode *inode = file_inode(filep); 239a51940bSAnna Schumaker struct nfs_server *server = NFS_SERVER(inode); 24f4ac1674SAnna Schumaker struct nfs42_falloc_args args = { 25f4ac1674SAnna Schumaker .falloc_fh = NFS_FH(inode), 26f4ac1674SAnna Schumaker .falloc_offset = offset, 27f4ac1674SAnna Schumaker .falloc_length = len, 289a51940bSAnna Schumaker .falloc_bitmask = server->cache_consistency_bitmask, 29f4ac1674SAnna Schumaker }; 309a51940bSAnna Schumaker struct nfs42_falloc_res res = { 319a51940bSAnna Schumaker .falloc_server = server, 329a51940bSAnna Schumaker }; 33f4ac1674SAnna Schumaker int status; 34f4ac1674SAnna Schumaker 35f4ac1674SAnna Schumaker msg->rpc_argp = &args; 36f4ac1674SAnna Schumaker msg->rpc_resp = &res; 37f4ac1674SAnna Schumaker 384bdf87ebSChristoph Hellwig status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, 394bdf87ebSChristoph Hellwig lock, FMODE_WRITE); 40f4ac1674SAnna Schumaker if (status) 41f4ac1674SAnna Schumaker return status; 42f4ac1674SAnna Schumaker 439a51940bSAnna Schumaker res.falloc_fattr = nfs_alloc_fattr(); 449a51940bSAnna Schumaker if (!res.falloc_fattr) 459a51940bSAnna Schumaker return -ENOMEM; 469a51940bSAnna Schumaker 479a51940bSAnna Schumaker status = nfs4_call_sync(server->client, server, msg, 48f4ac1674SAnna Schumaker &args.seq_args, &res.seq_res, 0); 499a51940bSAnna Schumaker if (status == 0) 509a51940bSAnna Schumaker status = nfs_post_op_update_inode(inode, res.falloc_fattr); 519a51940bSAnna Schumaker 529a51940bSAnna Schumaker kfree(res.falloc_fattr); 539a51940bSAnna Schumaker return status; 54f4ac1674SAnna Schumaker } 55f4ac1674SAnna Schumaker 56f4ac1674SAnna Schumaker static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, 57f4ac1674SAnna Schumaker loff_t offset, loff_t len) 58f4ac1674SAnna Schumaker { 59f4ac1674SAnna Schumaker struct nfs_server *server = NFS_SERVER(file_inode(filep)); 60f4ac1674SAnna Schumaker struct nfs4_exception exception = { }; 614bdf87ebSChristoph Hellwig struct nfs_lock_context *lock; 62f4ac1674SAnna Schumaker int err; 63f4ac1674SAnna Schumaker 644bdf87ebSChristoph Hellwig lock = nfs_get_lock_context(nfs_file_open_context(filep)); 654bdf87ebSChristoph Hellwig if (IS_ERR(lock)) 664bdf87ebSChristoph Hellwig return PTR_ERR(lock); 674bdf87ebSChristoph Hellwig 684bdf87ebSChristoph Hellwig exception.inode = file_inode(filep); 694bdf87ebSChristoph Hellwig exception.state = lock->open_context->state; 704bdf87ebSChristoph Hellwig 71f4ac1674SAnna Schumaker do { 724bdf87ebSChristoph Hellwig err = _nfs42_proc_fallocate(msg, filep, lock, offset, len); 734bdf87ebSChristoph Hellwig if (err == -ENOTSUPP) { 744bdf87ebSChristoph Hellwig err = -EOPNOTSUPP; 754bdf87ebSChristoph Hellwig break; 764bdf87ebSChristoph Hellwig } 77f4ac1674SAnna Schumaker err = nfs4_handle_exception(server, err, &exception); 78f4ac1674SAnna Schumaker } while (exception.retry); 79f4ac1674SAnna Schumaker 804bdf87ebSChristoph Hellwig nfs_put_lock_context(lock); 81f4ac1674SAnna Schumaker return err; 82f4ac1674SAnna Schumaker } 83f4ac1674SAnna Schumaker 84f4ac1674SAnna Schumaker int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) 85f4ac1674SAnna Schumaker { 86f4ac1674SAnna Schumaker struct rpc_message msg = { 87f4ac1674SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], 88f4ac1674SAnna Schumaker }; 89f4ac1674SAnna Schumaker struct inode *inode = file_inode(filep); 90f4ac1674SAnna Schumaker int err; 91f4ac1674SAnna Schumaker 92f4ac1674SAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) 93f4ac1674SAnna Schumaker return -EOPNOTSUPP; 94f4ac1674SAnna Schumaker 955955102cSAl Viro inode_lock(inode); 96f830f7ddSAnna Schumaker 97f4ac1674SAnna Schumaker err = nfs42_proc_fallocate(&msg, filep, offset, len); 98f4ac1674SAnna Schumaker if (err == -EOPNOTSUPP) 99f4ac1674SAnna Schumaker NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; 100f830f7ddSAnna Schumaker 1015955102cSAl Viro inode_unlock(inode); 102f4ac1674SAnna Schumaker return err; 103f4ac1674SAnna Schumaker } 104f4ac1674SAnna Schumaker 105624bd5b7SAnna Schumaker int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) 106624bd5b7SAnna Schumaker { 107624bd5b7SAnna Schumaker struct rpc_message msg = { 108624bd5b7SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], 109624bd5b7SAnna Schumaker }; 110624bd5b7SAnna Schumaker struct inode *inode = file_inode(filep); 111624bd5b7SAnna Schumaker int err; 112624bd5b7SAnna Schumaker 113624bd5b7SAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) 114624bd5b7SAnna Schumaker return -EOPNOTSUPP; 115624bd5b7SAnna Schumaker 1169a51940bSAnna Schumaker nfs_wb_all(inode); 1175955102cSAl Viro inode_lock(inode); 118f830f7ddSAnna Schumaker 119624bd5b7SAnna Schumaker err = nfs42_proc_fallocate(&msg, filep, offset, len); 1209a51940bSAnna Schumaker if (err == 0) 1219a51940bSAnna Schumaker truncate_pagecache_range(inode, offset, (offset + len) -1); 122624bd5b7SAnna Schumaker if (err == -EOPNOTSUPP) 123624bd5b7SAnna Schumaker NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; 124f830f7ddSAnna Schumaker 1255955102cSAl Viro inode_unlock(inode); 126624bd5b7SAnna Schumaker return err; 127624bd5b7SAnna Schumaker } 128624bd5b7SAnna Schumaker 1294bdf87ebSChristoph Hellwig static loff_t _nfs42_proc_llseek(struct file *filep, 1304bdf87ebSChristoph Hellwig struct nfs_lock_context *lock, loff_t offset, int whence) 1311c6dcbe5SAnna Schumaker { 1321c6dcbe5SAnna Schumaker struct inode *inode = file_inode(filep); 1331c6dcbe5SAnna Schumaker struct nfs42_seek_args args = { 1341c6dcbe5SAnna Schumaker .sa_fh = NFS_FH(inode), 1351c6dcbe5SAnna Schumaker .sa_offset = offset, 1361c6dcbe5SAnna Schumaker .sa_what = (whence == SEEK_HOLE) ? 1371c6dcbe5SAnna Schumaker NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, 1381c6dcbe5SAnna Schumaker }; 1391c6dcbe5SAnna Schumaker struct nfs42_seek_res res; 1401c6dcbe5SAnna Schumaker struct rpc_message msg = { 1411c6dcbe5SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], 1421c6dcbe5SAnna Schumaker .rpc_argp = &args, 1431c6dcbe5SAnna Schumaker .rpc_resp = &res, 1441c6dcbe5SAnna Schumaker }; 1451c6dcbe5SAnna Schumaker struct nfs_server *server = NFS_SERVER(inode); 1461c6dcbe5SAnna Schumaker int status; 1471c6dcbe5SAnna Schumaker 148878ffa9fSAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_SEEK)) 1491c6dcbe5SAnna Schumaker return -ENOTSUPP; 1501c6dcbe5SAnna Schumaker 1514bdf87ebSChristoph Hellwig status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, 1524bdf87ebSChristoph Hellwig lock, FMODE_READ); 1531c6dcbe5SAnna Schumaker if (status) 1541c6dcbe5SAnna Schumaker return status; 1551c6dcbe5SAnna Schumaker 1561c6dcbe5SAnna Schumaker nfs_wb_all(inode); 1571c6dcbe5SAnna Schumaker status = nfs4_call_sync(server->client, server, &msg, 1581c6dcbe5SAnna Schumaker &args.seq_args, &res.seq_res, 0); 1591c6dcbe5SAnna Schumaker if (status == -ENOTSUPP) 1601c6dcbe5SAnna Schumaker server->caps &= ~NFS_CAP_SEEK; 1611c6dcbe5SAnna Schumaker if (status) 1621c6dcbe5SAnna Schumaker return status; 1631c6dcbe5SAnna Schumaker 1641c6dcbe5SAnna Schumaker return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); 1651c6dcbe5SAnna Schumaker } 166be3a5d23STrond Myklebust 167bdcc2cd1SJ. Bruce Fields loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) 168bdcc2cd1SJ. Bruce Fields { 169bdcc2cd1SJ. Bruce Fields struct nfs_server *server = NFS_SERVER(file_inode(filep)); 170bdcc2cd1SJ. Bruce Fields struct nfs4_exception exception = { }; 1714bdf87ebSChristoph Hellwig struct nfs_lock_context *lock; 172306a5549SJ. Bruce Fields loff_t err; 173bdcc2cd1SJ. Bruce Fields 1744bdf87ebSChristoph Hellwig lock = nfs_get_lock_context(nfs_file_open_context(filep)); 1754bdf87ebSChristoph Hellwig if (IS_ERR(lock)) 1764bdf87ebSChristoph Hellwig return PTR_ERR(lock); 1774bdf87ebSChristoph Hellwig 1784bdf87ebSChristoph Hellwig exception.inode = file_inode(filep); 1794bdf87ebSChristoph Hellwig exception.state = lock->open_context->state; 1804bdf87ebSChristoph Hellwig 181bdcc2cd1SJ. Bruce Fields do { 1824bdf87ebSChristoph Hellwig err = _nfs42_proc_llseek(filep, lock, offset, whence); 183306a5549SJ. Bruce Fields if (err >= 0) 184306a5549SJ. Bruce Fields break; 1854bdf87ebSChristoph Hellwig if (err == -ENOTSUPP) { 1864bdf87ebSChristoph Hellwig err = -EOPNOTSUPP; 1874bdf87ebSChristoph Hellwig break; 1884bdf87ebSChristoph Hellwig } 189bdcc2cd1SJ. Bruce Fields err = nfs4_handle_exception(server, err, &exception); 190bdcc2cd1SJ. Bruce Fields } while (exception.retry); 191bdcc2cd1SJ. Bruce Fields 1924bdf87ebSChristoph Hellwig nfs_put_lock_context(lock); 193bdcc2cd1SJ. Bruce Fields return err; 194bdcc2cd1SJ. Bruce Fields } 195bdcc2cd1SJ. Bruce Fields 196bdcc2cd1SJ. Bruce Fields 1971b4a4bd8SPeng Tao static void 1981b4a4bd8SPeng Tao nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) 1991b4a4bd8SPeng Tao { 2001b4a4bd8SPeng Tao struct nfs42_layoutstat_data *data = calldata; 2011b4a4bd8SPeng Tao struct nfs_server *server = NFS_SERVER(data->args.inode); 2021b4a4bd8SPeng Tao 2031b4a4bd8SPeng Tao nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args, 2041b4a4bd8SPeng Tao &data->res.seq_res, task); 2051b4a4bd8SPeng Tao } 2061b4a4bd8SPeng Tao 2071b4a4bd8SPeng Tao static void 2081b4a4bd8SPeng Tao nfs42_layoutstat_done(struct rpc_task *task, void *calldata) 2091b4a4bd8SPeng Tao { 2101b4a4bd8SPeng Tao struct nfs42_layoutstat_data *data = calldata; 21168d264cfSPeng Tao struct inode *inode = data->inode; 21268d264cfSPeng Tao struct pnfs_layout_hdr *lo; 2131b4a4bd8SPeng Tao 2141b4a4bd8SPeng Tao if (!nfs4_sequence_done(task, &data->res.seq_res)) 2151b4a4bd8SPeng Tao return; 2161b4a4bd8SPeng Tao 2176c5a0d89STrond Myklebust switch (task->tk_status) { 2186c5a0d89STrond Myklebust case 0: 2196c5a0d89STrond Myklebust break; 22068d264cfSPeng Tao case -NFS4ERR_EXPIRED: 22168d264cfSPeng Tao case -NFS4ERR_STALE_STATEID: 22268d264cfSPeng Tao case -NFS4ERR_OLD_STATEID: 22368d264cfSPeng Tao case -NFS4ERR_BAD_STATEID: 22468d264cfSPeng Tao spin_lock(&inode->i_lock); 22568d264cfSPeng Tao lo = NFS_I(inode)->layout; 22668d264cfSPeng Tao if (lo && nfs4_stateid_match(&data->args.stateid, 22768d264cfSPeng Tao &lo->plh_stateid)) { 22868d264cfSPeng Tao LIST_HEAD(head); 22968d264cfSPeng Tao 23068d264cfSPeng Tao /* 23168d264cfSPeng Tao * Mark the bad layout state as invalid, then retry 23268d264cfSPeng Tao * with the current stateid. 23368d264cfSPeng Tao */ 23468d264cfSPeng Tao set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); 23568d264cfSPeng Tao pnfs_mark_matching_lsegs_invalid(lo, &head, NULL); 23668d264cfSPeng Tao spin_unlock(&inode->i_lock); 23768d264cfSPeng Tao pnfs_free_lseg_list(&head); 23868d264cfSPeng Tao } else 23968d264cfSPeng Tao spin_unlock(&inode->i_lock); 24068d264cfSPeng Tao break; 2416c5a0d89STrond Myklebust case -ENOTSUPP: 2426c5a0d89STrond Myklebust case -EOPNOTSUPP: 24368d264cfSPeng Tao NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; 2446c5a0d89STrond Myklebust default: 24568d264cfSPeng Tao break; 2461b4a4bd8SPeng Tao } 24768d264cfSPeng Tao 24868d264cfSPeng Tao dprintk("%s server returns %d\n", __func__, task->tk_status); 2496c5a0d89STrond Myklebust } 2501b4a4bd8SPeng Tao 2511b4a4bd8SPeng Tao static void 2521b4a4bd8SPeng Tao nfs42_layoutstat_release(void *calldata) 2531b4a4bd8SPeng Tao { 2541b4a4bd8SPeng Tao struct nfs42_layoutstat_data *data = calldata; 2558733408dSPeng Tao struct nfs_server *nfss = NFS_SERVER(data->args.inode); 2568733408dSPeng Tao 2578733408dSPeng Tao if (nfss->pnfs_curr_ld->cleanup_layoutstats) 2588733408dSPeng Tao nfss->pnfs_curr_ld->cleanup_layoutstats(data); 2591b4a4bd8SPeng Tao 2601b4a4bd8SPeng Tao pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); 2611bfe3b25SPeng Tao smp_mb__before_atomic(); 2621bfe3b25SPeng Tao clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); 2631bfe3b25SPeng Tao smp_mb__after_atomic(); 2641b4a4bd8SPeng Tao nfs_iput_and_deactive(data->inode); 2651b4a4bd8SPeng Tao kfree(data->args.devinfo); 2661b4a4bd8SPeng Tao kfree(data); 2671b4a4bd8SPeng Tao } 2681b4a4bd8SPeng Tao 269be3a5d23STrond Myklebust static const struct rpc_call_ops nfs42_layoutstat_ops = { 2701b4a4bd8SPeng Tao .rpc_call_prepare = nfs42_layoutstat_prepare, 2711b4a4bd8SPeng Tao .rpc_call_done = nfs42_layoutstat_done, 2721b4a4bd8SPeng Tao .rpc_release = nfs42_layoutstat_release, 273be3a5d23STrond Myklebust }; 274be3a5d23STrond Myklebust 275be3a5d23STrond Myklebust int nfs42_proc_layoutstats_generic(struct nfs_server *server, 276be3a5d23STrond Myklebust struct nfs42_layoutstat_data *data) 277be3a5d23STrond Myklebust { 278be3a5d23STrond Myklebust struct rpc_message msg = { 279be3a5d23STrond Myklebust .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], 280be3a5d23STrond Myklebust .rpc_argp = &data->args, 281be3a5d23STrond Myklebust .rpc_resp = &data->res, 282be3a5d23STrond Myklebust }; 283be3a5d23STrond Myklebust struct rpc_task_setup task_setup = { 284be3a5d23STrond Myklebust .rpc_client = server->client, 285be3a5d23STrond Myklebust .rpc_message = &msg, 286be3a5d23STrond Myklebust .callback_ops = &nfs42_layoutstat_ops, 287be3a5d23STrond Myklebust .callback_data = data, 288be3a5d23STrond Myklebust .flags = RPC_TASK_ASYNC, 289be3a5d23STrond Myklebust }; 290be3a5d23STrond Myklebust struct rpc_task *task; 291be3a5d23STrond Myklebust 2921b4a4bd8SPeng Tao data->inode = nfs_igrab_and_active(data->args.inode); 2931b4a4bd8SPeng Tao if (!data->inode) { 2941b4a4bd8SPeng Tao nfs42_layoutstat_release(data); 2951b4a4bd8SPeng Tao return -EAGAIN; 2961b4a4bd8SPeng Tao } 297be3a5d23STrond Myklebust nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 298be3a5d23STrond Myklebust task = rpc_run_task(&task_setup); 299be3a5d23STrond Myklebust if (IS_ERR(task)) 300be3a5d23STrond Myklebust return PTR_ERR(task); 301be3a5d23STrond Myklebust return 0; 302be3a5d23STrond Myklebust } 303e5341f3aSPeng Tao 304e5341f3aSPeng Tao static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, 3054bdf87ebSChristoph Hellwig struct file *dst_f, struct nfs_lock_context *src_lock, 3064bdf87ebSChristoph Hellwig struct nfs_lock_context *dst_lock, loff_t src_offset, 307e5341f3aSPeng Tao loff_t dst_offset, loff_t count) 308e5341f3aSPeng Tao { 309e5341f3aSPeng Tao struct inode *src_inode = file_inode(src_f); 310e5341f3aSPeng Tao struct inode *dst_inode = file_inode(dst_f); 311e5341f3aSPeng Tao struct nfs_server *server = NFS_SERVER(dst_inode); 312e5341f3aSPeng Tao struct nfs42_clone_args args = { 313e5341f3aSPeng Tao .src_fh = NFS_FH(src_inode), 314e5341f3aSPeng Tao .dst_fh = NFS_FH(dst_inode), 315e5341f3aSPeng Tao .src_offset = src_offset, 316e5341f3aSPeng Tao .dst_offset = dst_offset, 3179494b2ceSChristoph Hellwig .count = count, 318e5341f3aSPeng Tao .dst_bitmask = server->cache_consistency_bitmask, 319e5341f3aSPeng Tao }; 320e5341f3aSPeng Tao struct nfs42_clone_res res = { 321e5341f3aSPeng Tao .server = server, 322e5341f3aSPeng Tao }; 323e5341f3aSPeng Tao int status; 324e5341f3aSPeng Tao 325e5341f3aSPeng Tao msg->rpc_argp = &args; 326e5341f3aSPeng Tao msg->rpc_resp = &res; 327e5341f3aSPeng Tao 3284bdf87ebSChristoph Hellwig status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, 3294bdf87ebSChristoph Hellwig src_lock, FMODE_READ); 330e5341f3aSPeng Tao if (status) 331e5341f3aSPeng Tao return status; 332e5341f3aSPeng Tao 3334bdf87ebSChristoph Hellwig status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, 3344bdf87ebSChristoph Hellwig dst_lock, FMODE_WRITE); 335e5341f3aSPeng Tao if (status) 336e5341f3aSPeng Tao return status; 337e5341f3aSPeng Tao 338e5341f3aSPeng Tao res.dst_fattr = nfs_alloc_fattr(); 339e5341f3aSPeng Tao if (!res.dst_fattr) 340e5341f3aSPeng Tao return -ENOMEM; 341e5341f3aSPeng Tao 342e5341f3aSPeng Tao status = nfs4_call_sync(server->client, server, msg, 343e5341f3aSPeng Tao &args.seq_args, &res.seq_res, 0); 344e5341f3aSPeng Tao if (status == 0) 345e5341f3aSPeng Tao status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); 346e5341f3aSPeng Tao 347e5341f3aSPeng Tao kfree(res.dst_fattr); 348e5341f3aSPeng Tao return status; 349e5341f3aSPeng Tao } 350e5341f3aSPeng Tao 351e5341f3aSPeng Tao int nfs42_proc_clone(struct file *src_f, struct file *dst_f, 352e5341f3aSPeng Tao loff_t src_offset, loff_t dst_offset, loff_t count) 353e5341f3aSPeng Tao { 354e5341f3aSPeng Tao struct rpc_message msg = { 355e5341f3aSPeng Tao .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], 356e5341f3aSPeng Tao }; 357e5341f3aSPeng Tao struct inode *inode = file_inode(src_f); 358e5341f3aSPeng Tao struct nfs_server *server = NFS_SERVER(file_inode(src_f)); 3594bdf87ebSChristoph Hellwig struct nfs_lock_context *src_lock; 3604bdf87ebSChristoph Hellwig struct nfs_lock_context *dst_lock; 3614bdf87ebSChristoph Hellwig struct nfs4_exception src_exception = { }; 3624bdf87ebSChristoph Hellwig struct nfs4_exception dst_exception = { }; 3634bdf87ebSChristoph Hellwig int err, err2; 364e5341f3aSPeng Tao 365e5341f3aSPeng Tao if (!nfs_server_capable(inode, NFS_CAP_CLONE)) 366e5341f3aSPeng Tao return -EOPNOTSUPP; 367e5341f3aSPeng Tao 3684bdf87ebSChristoph Hellwig src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); 3694bdf87ebSChristoph Hellwig if (IS_ERR(src_lock)) 3704bdf87ebSChristoph Hellwig return PTR_ERR(src_lock); 3714bdf87ebSChristoph Hellwig 3724bdf87ebSChristoph Hellwig src_exception.inode = file_inode(src_f); 3734bdf87ebSChristoph Hellwig src_exception.state = src_lock->open_context->state; 3744bdf87ebSChristoph Hellwig 3754bdf87ebSChristoph Hellwig dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); 3764bdf87ebSChristoph Hellwig if (IS_ERR(dst_lock)) { 3774bdf87ebSChristoph Hellwig err = PTR_ERR(dst_lock); 3784bdf87ebSChristoph Hellwig goto out_put_src_lock; 3794bdf87ebSChristoph Hellwig } 3804bdf87ebSChristoph Hellwig 3814bdf87ebSChristoph Hellwig dst_exception.inode = file_inode(dst_f); 3824bdf87ebSChristoph Hellwig dst_exception.state = dst_lock->open_context->state; 3834bdf87ebSChristoph Hellwig 384e5341f3aSPeng Tao do { 3854bdf87ebSChristoph Hellwig err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, 3864bdf87ebSChristoph Hellwig src_offset, dst_offset, count); 387e5341f3aSPeng Tao if (err == -ENOTSUPP || err == -EOPNOTSUPP) { 388e5341f3aSPeng Tao NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; 3894bdf87ebSChristoph Hellwig err = -EOPNOTSUPP; 3904bdf87ebSChristoph Hellwig break; 391e5341f3aSPeng Tao } 392e5341f3aSPeng Tao 3934bdf87ebSChristoph Hellwig err2 = nfs4_handle_exception(server, err, &src_exception); 3944bdf87ebSChristoph Hellwig err = nfs4_handle_exception(server, err, &dst_exception); 3954bdf87ebSChristoph Hellwig if (!err) 3964bdf87ebSChristoph Hellwig err = err2; 3974bdf87ebSChristoph Hellwig } while (src_exception.retry || dst_exception.retry); 3984bdf87ebSChristoph Hellwig 3994bdf87ebSChristoph Hellwig nfs_put_lock_context(dst_lock); 4004bdf87ebSChristoph Hellwig out_put_src_lock: 4014bdf87ebSChristoph Hellwig nfs_put_lock_context(src_lock); 402e5341f3aSPeng Tao return err; 403e5341f3aSPeng Tao } 404