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1c6dcbe5 AS |
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 | ||
14 | static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file, | |
15 | fmode_t fmode) | |
16 | { | |
17 | struct nfs_open_context *open; | |
18 | struct nfs_lock_context *lock; | |
19 | int ret; | |
20 | ||
21 | open = get_nfs_open_context(nfs_file_open_context(file)); | |
22 | lock = nfs_get_lock_context(open); | |
23 | if (IS_ERR(lock)) { | |
24 | put_nfs_open_context(open); | |
25 | return PTR_ERR(lock); | |
26 | } | |
27 | ||
28 | ret = nfs4_set_rw_stateid(dst, open, lock, fmode); | |
29 | ||
30 | nfs_put_lock_context(lock); | |
31 | put_nfs_open_context(open); | |
32 | return ret; | |
33 | } | |
34 | ||
f4ac1674 AS |
35 | static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, |
36 | loff_t offset, loff_t len) | |
37 | { | |
38 | struct inode *inode = file_inode(filep); | |
9a51940b | 39 | struct nfs_server *server = NFS_SERVER(inode); |
f4ac1674 AS |
40 | struct nfs42_falloc_args args = { |
41 | .falloc_fh = NFS_FH(inode), | |
42 | .falloc_offset = offset, | |
43 | .falloc_length = len, | |
9a51940b AS |
44 | .falloc_bitmask = server->cache_consistency_bitmask, |
45 | }; | |
46 | struct nfs42_falloc_res res = { | |
47 | .falloc_server = server, | |
f4ac1674 | 48 | }; |
f4ac1674 AS |
49 | int status; |
50 | ||
51 | msg->rpc_argp = &args; | |
52 | msg->rpc_resp = &res; | |
53 | ||
54 | status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE); | |
55 | if (status) | |
56 | return status; | |
57 | ||
9a51940b AS |
58 | res.falloc_fattr = nfs_alloc_fattr(); |
59 | if (!res.falloc_fattr) | |
60 | return -ENOMEM; | |
61 | ||
62 | status = nfs4_call_sync(server->client, server, msg, | |
63 | &args.seq_args, &res.seq_res, 0); | |
64 | if (status == 0) | |
65 | status = nfs_post_op_update_inode(inode, res.falloc_fattr); | |
66 | ||
67 | kfree(res.falloc_fattr); | |
68 | return status; | |
f4ac1674 AS |
69 | } |
70 | ||
71 | static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, | |
72 | loff_t offset, loff_t len) | |
73 | { | |
74 | struct nfs_server *server = NFS_SERVER(file_inode(filep)); | |
75 | struct nfs4_exception exception = { }; | |
76 | int err; | |
77 | ||
78 | do { | |
79 | err = _nfs42_proc_fallocate(msg, filep, offset, len); | |
80 | if (err == -ENOTSUPP) | |
81 | return -EOPNOTSUPP; | |
82 | err = nfs4_handle_exception(server, err, &exception); | |
83 | } while (exception.retry); | |
84 | ||
85 | return err; | |
86 | } | |
87 | ||
88 | int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) | |
89 | { | |
90 | struct rpc_message msg = { | |
91 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], | |
92 | }; | |
93 | struct inode *inode = file_inode(filep); | |
94 | int err; | |
95 | ||
96 | if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) | |
97 | return -EOPNOTSUPP; | |
98 | ||
f830f7dd AS |
99 | mutex_lock(&inode->i_mutex); |
100 | ||
f4ac1674 AS |
101 | err = nfs42_proc_fallocate(&msg, filep, offset, len); |
102 | if (err == -EOPNOTSUPP) | |
103 | NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; | |
f830f7dd AS |
104 | |
105 | mutex_unlock(&inode->i_mutex); | |
f4ac1674 AS |
106 | return err; |
107 | } | |
108 | ||
624bd5b7 AS |
109 | int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) |
110 | { | |
111 | struct rpc_message msg = { | |
112 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], | |
113 | }; | |
114 | struct inode *inode = file_inode(filep); | |
115 | int err; | |
116 | ||
117 | if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) | |
118 | return -EOPNOTSUPP; | |
119 | ||
9a51940b | 120 | nfs_wb_all(inode); |
f830f7dd AS |
121 | mutex_lock(&inode->i_mutex); |
122 | ||
624bd5b7 | 123 | err = nfs42_proc_fallocate(&msg, filep, offset, len); |
9a51940b AS |
124 | if (err == 0) |
125 | truncate_pagecache_range(inode, offset, (offset + len) -1); | |
624bd5b7 AS |
126 | if (err == -EOPNOTSUPP) |
127 | NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; | |
f830f7dd AS |
128 | |
129 | mutex_unlock(&inode->i_mutex); | |
624bd5b7 AS |
130 | return err; |
131 | } | |
132 | ||
1c6dcbe5 AS |
133 | loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) |
134 | { | |
135 | struct inode *inode = file_inode(filep); | |
136 | struct nfs42_seek_args args = { | |
137 | .sa_fh = NFS_FH(inode), | |
138 | .sa_offset = offset, | |
139 | .sa_what = (whence == SEEK_HOLE) ? | |
140 | NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, | |
141 | }; | |
142 | struct nfs42_seek_res res; | |
143 | struct rpc_message msg = { | |
144 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], | |
145 | .rpc_argp = &args, | |
146 | .rpc_resp = &res, | |
147 | }; | |
148 | struct nfs_server *server = NFS_SERVER(inode); | |
149 | int status; | |
150 | ||
878ffa9f | 151 | if (!nfs_server_capable(inode, NFS_CAP_SEEK)) |
1c6dcbe5 AS |
152 | return -ENOTSUPP; |
153 | ||
154 | status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ); | |
155 | if (status) | |
156 | return status; | |
157 | ||
158 | nfs_wb_all(inode); | |
159 | status = nfs4_call_sync(server->client, server, &msg, | |
160 | &args.seq_args, &res.seq_res, 0); | |
161 | if (status == -ENOTSUPP) | |
162 | server->caps &= ~NFS_CAP_SEEK; | |
163 | if (status) | |
164 | return status; | |
165 | ||
166 | return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); | |
167 | } | |
be3a5d23 TM |
168 | |
169 | static const struct rpc_call_ops nfs42_layoutstat_ops = { | |
170 | }; | |
171 | ||
172 | int nfs42_proc_layoutstats_generic(struct nfs_server *server, | |
173 | struct nfs42_layoutstat_data *data) | |
174 | { | |
175 | struct rpc_message msg = { | |
176 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], | |
177 | .rpc_argp = &data->args, | |
178 | .rpc_resp = &data->res, | |
179 | }; | |
180 | struct rpc_task_setup task_setup = { | |
181 | .rpc_client = server->client, | |
182 | .rpc_message = &msg, | |
183 | .callback_ops = &nfs42_layoutstat_ops, | |
184 | .callback_data = data, | |
185 | .flags = RPC_TASK_ASYNC, | |
186 | }; | |
187 | struct rpc_task *task; | |
188 | ||
189 | nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); | |
190 | task = rpc_run_task(&task_setup); | |
191 | if (IS_ERR(task)) | |
192 | return PTR_ERR(task); | |
193 | return 0; | |
194 | } |