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-rw-r--r--fs/nfs/nfs4file.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index c51fb4db9bf..8b46389c4c5 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -3,6 +3,8 @@
*
* Copyright (C) 1992 Rick Sladkey
*/
+#include <linux/fs.h>
+#include <linux/falloc.h>
#include <linux/nfs_fs.h>
#include "internal.h"
#include "fscache.h"
@@ -134,6 +136,32 @@ static loff_t nfs4_file_llseek(struct file *filep, loff_t offset, int whence)
return nfs_file_llseek(filep, offset, whence);
}
}
+
+static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t len)
+{
+ struct inode *inode = file_inode(filep);
+ long ret;
+
+ if (!S_ISREG(inode->i_mode))
+ return -EOPNOTSUPP;
+
+ if ((mode != 0) && (mode != (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)))
+ return -EOPNOTSUPP;
+
+ ret = inode_newsize_ok(inode, offset + len);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&inode->i_mutex);
+ if (mode & FALLOC_FL_PUNCH_HOLE)
+ ret = nfs42_proc_deallocate(filep, offset, len);
+ else
+ ret = nfs42_proc_allocate(filep, offset, len);
+ mutex_unlock(&inode->i_mutex);
+
+ nfs_zap_caches(inode);
+ return ret;
+}
#endif /* CONFIG_NFS_V4_2 */
const struct file_operations nfs4_file_operations = {
@@ -155,6 +183,9 @@ const struct file_operations nfs4_file_operations = {
.flock = nfs_flock,
.splice_read = nfs_file_splice_read,
.splice_write = iter_file_splice_write,
+#ifdef CONFIG_NFS_V4_2
+ .fallocate = nfs42_fallocate,
+#endif /* CONFIG_NFS_V4_2 */
.check_flags = nfs_check_flags,
.setlease = simple_nosetlease,
};