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" 131c6dcbe5SAnna Schumaker 141c6dcbe5SAnna Schumaker static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file, 151c6dcbe5SAnna Schumaker fmode_t fmode) 161c6dcbe5SAnna Schumaker { 171c6dcbe5SAnna Schumaker struct nfs_open_context *open; 181c6dcbe5SAnna Schumaker struct nfs_lock_context *lock; 191c6dcbe5SAnna Schumaker int ret; 201c6dcbe5SAnna Schumaker 211c6dcbe5SAnna Schumaker open = get_nfs_open_context(nfs_file_open_context(file)); 221c6dcbe5SAnna Schumaker lock = nfs_get_lock_context(open); 231c6dcbe5SAnna Schumaker if (IS_ERR(lock)) { 241c6dcbe5SAnna Schumaker put_nfs_open_context(open); 251c6dcbe5SAnna Schumaker return PTR_ERR(lock); 261c6dcbe5SAnna Schumaker } 271c6dcbe5SAnna Schumaker 281c6dcbe5SAnna Schumaker ret = nfs4_set_rw_stateid(dst, open, lock, fmode); 291c6dcbe5SAnna Schumaker 301c6dcbe5SAnna Schumaker nfs_put_lock_context(lock); 311c6dcbe5SAnna Schumaker put_nfs_open_context(open); 321c6dcbe5SAnna Schumaker return ret; 331c6dcbe5SAnna Schumaker } 341c6dcbe5SAnna Schumaker 35f4ac1674SAnna Schumaker static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, 36f4ac1674SAnna Schumaker loff_t offset, loff_t len) 37f4ac1674SAnna Schumaker { 38f4ac1674SAnna Schumaker struct inode *inode = file_inode(filep); 399a51940bSAnna Schumaker struct nfs_server *server = NFS_SERVER(inode); 40f4ac1674SAnna Schumaker struct nfs42_falloc_args args = { 41f4ac1674SAnna Schumaker .falloc_fh = NFS_FH(inode), 42f4ac1674SAnna Schumaker .falloc_offset = offset, 43f4ac1674SAnna Schumaker .falloc_length = len, 449a51940bSAnna Schumaker .falloc_bitmask = server->cache_consistency_bitmask, 45f4ac1674SAnna Schumaker }; 469a51940bSAnna Schumaker struct nfs42_falloc_res res = { 479a51940bSAnna Schumaker .falloc_server = server, 489a51940bSAnna Schumaker }; 49f4ac1674SAnna Schumaker int status; 50f4ac1674SAnna Schumaker 51f4ac1674SAnna Schumaker msg->rpc_argp = &args; 52f4ac1674SAnna Schumaker msg->rpc_resp = &res; 53f4ac1674SAnna Schumaker 54f4ac1674SAnna Schumaker status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE); 55f4ac1674SAnna Schumaker if (status) 56f4ac1674SAnna Schumaker return status; 57f4ac1674SAnna Schumaker 589a51940bSAnna Schumaker res.falloc_fattr = nfs_alloc_fattr(); 599a51940bSAnna Schumaker if (!res.falloc_fattr) 609a51940bSAnna Schumaker return -ENOMEM; 619a51940bSAnna Schumaker 629a51940bSAnna Schumaker status = nfs4_call_sync(server->client, server, msg, 63f4ac1674SAnna Schumaker &args.seq_args, &res.seq_res, 0); 649a51940bSAnna Schumaker if (status == 0) 659a51940bSAnna Schumaker status = nfs_post_op_update_inode(inode, res.falloc_fattr); 669a51940bSAnna Schumaker 679a51940bSAnna Schumaker kfree(res.falloc_fattr); 689a51940bSAnna Schumaker return status; 69f4ac1674SAnna Schumaker } 70f4ac1674SAnna Schumaker 71f4ac1674SAnna Schumaker static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, 72f4ac1674SAnna Schumaker loff_t offset, loff_t len) 73f4ac1674SAnna Schumaker { 74f4ac1674SAnna Schumaker struct nfs_server *server = NFS_SERVER(file_inode(filep)); 75f4ac1674SAnna Schumaker struct nfs4_exception exception = { }; 76f4ac1674SAnna Schumaker int err; 77f4ac1674SAnna Schumaker 78f4ac1674SAnna Schumaker do { 79f4ac1674SAnna Schumaker err = _nfs42_proc_fallocate(msg, filep, offset, len); 80f4ac1674SAnna Schumaker if (err == -ENOTSUPP) 81f4ac1674SAnna Schumaker return -EOPNOTSUPP; 82f4ac1674SAnna Schumaker err = nfs4_handle_exception(server, err, &exception); 83f4ac1674SAnna Schumaker } while (exception.retry); 84f4ac1674SAnna Schumaker 85f4ac1674SAnna Schumaker return err; 86f4ac1674SAnna Schumaker } 87f4ac1674SAnna Schumaker 88f4ac1674SAnna Schumaker int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) 89f4ac1674SAnna Schumaker { 90f4ac1674SAnna Schumaker struct rpc_message msg = { 91f4ac1674SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], 92f4ac1674SAnna Schumaker }; 93f4ac1674SAnna Schumaker struct inode *inode = file_inode(filep); 94f4ac1674SAnna Schumaker int err; 95f4ac1674SAnna Schumaker 96f4ac1674SAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) 97f4ac1674SAnna Schumaker return -EOPNOTSUPP; 98f4ac1674SAnna Schumaker 99f830f7ddSAnna Schumaker mutex_lock(&inode->i_mutex); 100f830f7ddSAnna Schumaker 101f4ac1674SAnna Schumaker err = nfs42_proc_fallocate(&msg, filep, offset, len); 102f4ac1674SAnna Schumaker if (err == -EOPNOTSUPP) 103f4ac1674SAnna Schumaker NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; 104f830f7ddSAnna Schumaker 105f830f7ddSAnna Schumaker mutex_unlock(&inode->i_mutex); 106f4ac1674SAnna Schumaker return err; 107f4ac1674SAnna Schumaker } 108f4ac1674SAnna Schumaker 109624bd5b7SAnna Schumaker int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) 110624bd5b7SAnna Schumaker { 111624bd5b7SAnna Schumaker struct rpc_message msg = { 112624bd5b7SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], 113624bd5b7SAnna Schumaker }; 114624bd5b7SAnna Schumaker struct inode *inode = file_inode(filep); 115624bd5b7SAnna Schumaker int err; 116624bd5b7SAnna Schumaker 117624bd5b7SAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) 118624bd5b7SAnna Schumaker return -EOPNOTSUPP; 119624bd5b7SAnna Schumaker 1209a51940bSAnna Schumaker nfs_wb_all(inode); 121f830f7ddSAnna Schumaker mutex_lock(&inode->i_mutex); 122f830f7ddSAnna Schumaker 123624bd5b7SAnna Schumaker err = nfs42_proc_fallocate(&msg, filep, offset, len); 1249a51940bSAnna Schumaker if (err == 0) 1259a51940bSAnna Schumaker truncate_pagecache_range(inode, offset, (offset + len) -1); 126624bd5b7SAnna Schumaker if (err == -EOPNOTSUPP) 127624bd5b7SAnna Schumaker NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; 128f830f7ddSAnna Schumaker 129f830f7ddSAnna Schumaker mutex_unlock(&inode->i_mutex); 130624bd5b7SAnna Schumaker return err; 131624bd5b7SAnna Schumaker } 132624bd5b7SAnna Schumaker 1331c6dcbe5SAnna Schumaker loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) 1341c6dcbe5SAnna Schumaker { 1351c6dcbe5SAnna Schumaker struct inode *inode = file_inode(filep); 1361c6dcbe5SAnna Schumaker struct nfs42_seek_args args = { 1371c6dcbe5SAnna Schumaker .sa_fh = NFS_FH(inode), 1381c6dcbe5SAnna Schumaker .sa_offset = offset, 1391c6dcbe5SAnna Schumaker .sa_what = (whence == SEEK_HOLE) ? 1401c6dcbe5SAnna Schumaker NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, 1411c6dcbe5SAnna Schumaker }; 1421c6dcbe5SAnna Schumaker struct nfs42_seek_res res; 1431c6dcbe5SAnna Schumaker struct rpc_message msg = { 1441c6dcbe5SAnna Schumaker .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], 1451c6dcbe5SAnna Schumaker .rpc_argp = &args, 1461c6dcbe5SAnna Schumaker .rpc_resp = &res, 1471c6dcbe5SAnna Schumaker }; 1481c6dcbe5SAnna Schumaker struct nfs_server *server = NFS_SERVER(inode); 1491c6dcbe5SAnna Schumaker int status; 1501c6dcbe5SAnna Schumaker 151878ffa9fSAnna Schumaker if (!nfs_server_capable(inode, NFS_CAP_SEEK)) 1521c6dcbe5SAnna Schumaker return -ENOTSUPP; 1531c6dcbe5SAnna Schumaker 1541c6dcbe5SAnna Schumaker status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ); 1551c6dcbe5SAnna Schumaker if (status) 1561c6dcbe5SAnna Schumaker return status; 1571c6dcbe5SAnna Schumaker 1581c6dcbe5SAnna Schumaker nfs_wb_all(inode); 1591c6dcbe5SAnna Schumaker status = nfs4_call_sync(server->client, server, &msg, 1601c6dcbe5SAnna Schumaker &args.seq_args, &res.seq_res, 0); 1611c6dcbe5SAnna Schumaker if (status == -ENOTSUPP) 1621c6dcbe5SAnna Schumaker server->caps &= ~NFS_CAP_SEEK; 1631c6dcbe5SAnna Schumaker if (status) 1641c6dcbe5SAnna Schumaker return status; 1651c6dcbe5SAnna Schumaker 1661c6dcbe5SAnna Schumaker return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); 1671c6dcbe5SAnna Schumaker } 168