5 #include <linux/sunrpc/sched.h>
7 #include <linux/nfs3.h>
8 #include <linux/nfs4.h>
9 #include <linux/nfs_xdr.h>
10 #include <linux/nfs_fs.h>
14 static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file,
17 struct nfs_open_context *open;
18 struct nfs_lock_context *lock;
21 open = get_nfs_open_context(nfs_file_open_context(file));
22 lock = nfs_get_lock_context(open);
24 put_nfs_open_context(open);
28 ret = nfs4_set_rw_stateid(dst, open, lock, fmode);
30 nfs_put_lock_context(lock);
31 put_nfs_open_context(open);
35 static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
36 loff_t offset, loff_t len)
38 struct inode *inode = file_inode(filep);
39 struct nfs42_falloc_args args = {
40 .falloc_fh = NFS_FH(inode),
41 .falloc_offset = offset,
44 struct nfs42_falloc_res res;
45 struct nfs_server *server = NFS_SERVER(inode);
48 msg->rpc_argp = &args;
51 status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE);
55 return nfs4_call_sync(server->client, server, msg,
56 &args.seq_args, &res.seq_res, 0);
59 static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
60 loff_t offset, loff_t len)
62 struct nfs_server *server = NFS_SERVER(file_inode(filep));
63 struct nfs4_exception exception = { };
67 err = _nfs42_proc_fallocate(msg, filep, offset, len);
70 err = nfs4_handle_exception(server, err, &exception);
71 } while (exception.retry);
76 int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
78 struct rpc_message msg = {
79 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
81 struct inode *inode = file_inode(filep);
84 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
87 err = nfs42_proc_fallocate(&msg, filep, offset, len);
88 if (err == -EOPNOTSUPP)
89 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
93 int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
95 struct rpc_message msg = {
96 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
98 struct inode *inode = file_inode(filep);
101 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
104 err = nfs42_proc_fallocate(&msg, filep, offset, len);
105 if (err == -EOPNOTSUPP)
106 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
110 loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
112 struct inode *inode = file_inode(filep);
113 struct nfs42_seek_args args = {
114 .sa_fh = NFS_FH(inode),
116 .sa_what = (whence == SEEK_HOLE) ?
117 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
119 struct nfs42_seek_res res;
120 struct rpc_message msg = {
121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
125 struct nfs_server *server = NFS_SERVER(inode);
128 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
131 status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ);
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;
143 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);