blob: cb170722769cd807990177274bc5a70e64bf806a [file] [log] [blame]
Anna Schumaker1c6dcbe2014-09-26 13:58:48 -04001/*
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
14static 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
Anna Schumakerf4ac1672014-11-25 13:18:15 -050035static 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);
39 struct nfs42_falloc_args args = {
40 .falloc_fh = NFS_FH(inode),
41 .falloc_offset = offset,
42 .falloc_length = len,
43 };
44 struct nfs42_falloc_res res;
45 struct nfs_server *server = NFS_SERVER(inode);
46 int status;
47
48 msg->rpc_argp = &args;
49 msg->rpc_resp = &res;
50
51 status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE);
52 if (status)
53 return status;
54
55 return nfs4_call_sync(server->client, server, msg,
56 &args.seq_args, &res.seq_res, 0);
57}
58
59static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
60 loff_t offset, loff_t len)
61{
62 struct nfs_server *server = NFS_SERVER(file_inode(filep));
63 struct nfs4_exception exception = { };
64 int err;
65
66 do {
67 err = _nfs42_proc_fallocate(msg, filep, offset, len);
68 if (err == -ENOTSUPP)
69 return -EOPNOTSUPP;
70 err = nfs4_handle_exception(server, err, &exception);
71 } while (exception.retry);
72
73 return err;
74}
75
76int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
77{
78 struct rpc_message msg = {
79 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
80 };
81 struct inode *inode = file_inode(filep);
82 int err;
83
84 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
85 return -EOPNOTSUPP;
86
87 err = nfs42_proc_fallocate(&msg, filep, offset, len);
88 if (err == -EOPNOTSUPP)
89 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
90 return err;
91}
92
Anna Schumaker624bd5b2014-11-25 13:18:16 -050093int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
94{
95 struct rpc_message msg = {
96 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
97 };
98 struct inode *inode = file_inode(filep);
99 int err;
100
101 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
102 return -EOPNOTSUPP;
103
104 err = nfs42_proc_fallocate(&msg, filep, offset, len);
105 if (err == -EOPNOTSUPP)
106 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
107 return err;
108}
109
Anna Schumaker1c6dcbe2014-09-26 13:58:48 -0400110loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
111{
112 struct inode *inode = file_inode(filep);
113 struct nfs42_seek_args args = {
114 .sa_fh = NFS_FH(inode),
115 .sa_offset = offset,
116 .sa_what = (whence == SEEK_HOLE) ?
117 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
118 };
119 struct nfs42_seek_res res;
120 struct rpc_message msg = {
121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
122 .rpc_argp = &args,
123 .rpc_resp = &res,
124 };
125 struct nfs_server *server = NFS_SERVER(inode);
126 int status;
127
Anna Schumaker878ffa92014-10-23 14:00:54 -0400128 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
Anna Schumaker1c6dcbe2014-09-26 13:58:48 -0400129 return -ENOTSUPP;
130
131 status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ);
132 if (status)
133 return status;
134
135 nfs_wb_all(inode);
136 status = nfs4_call_sync(server->client, server, &msg,
137 &args.seq_args, &res.seq_res, 0);
138 if (status == -ENOTSUPP)
139 server->caps &= ~NFS_CAP_SEEK;
140 if (status)
141 return status;
142
143 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
144}