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authorAnna Schumaker <Anna.Schumaker@netapp.com>2014-11-25 21:18:15 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2014-11-26 00:38:32 +0300
commitf4ac1674f5da420ef17896f0f222c5215ebcde80 (patch)
tree5ad22eac7b8ef584ce1b39b618aeb0b242dcccb7 /fs/nfs/nfs42proc.c
parente9f456ca50e579dfacd996f50637f0bb0a585dfc (diff)
downloadlinux-f4ac1674f5da420ef17896f0f222c5215ebcde80.tar.xz
nfs: Add ALLOCATE support
This patch adds support for using the NFS v4.2 operation ALLOCATE to preallocate data in a file. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/nfs42proc.c')
-rw-r--r--fs/nfs/nfs42proc.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 056f5aafecc1..581f34e9d8a0 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -32,6 +32,64 @@ static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file,
return ret;
}
+static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
+ loff_t offset, loff_t len)
+{
+ struct inode *inode = file_inode(filep);
+ struct nfs42_falloc_args args = {
+ .falloc_fh = NFS_FH(inode),
+ .falloc_offset = offset,
+ .falloc_length = len,
+ };
+ struct nfs42_falloc_res res;
+ struct nfs_server *server = NFS_SERVER(inode);
+ int status;
+
+ msg->rpc_argp = &args;
+ msg->rpc_resp = &res;
+
+ status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE);
+ if (status)
+ return status;
+
+ return nfs4_call_sync(server->client, server, msg,
+ &args.seq_args, &res.seq_res, 0);
+}
+
+static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
+ loff_t offset, loff_t len)
+{
+ struct nfs_server *server = NFS_SERVER(file_inode(filep));
+ struct nfs4_exception exception = { };
+ int err;
+
+ do {
+ err = _nfs42_proc_fallocate(msg, filep, offset, len);
+ if (err == -ENOTSUPP)
+ return -EOPNOTSUPP;
+ err = nfs4_handle_exception(server, err, &exception);
+ } while (exception.retry);
+
+ return err;
+}
+
+int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
+ };
+ struct inode *inode = file_inode(filep);
+ int err;
+
+ if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
+ return -EOPNOTSUPP;
+
+ err = nfs42_proc_fallocate(&msg, filep, offset, len);
+ if (err == -EOPNOTSUPP)
+ NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
+ return err;
+}
+
loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
struct inode *inode = file_inode(filep);