diff options
| author | Anna Schumaker <Anna.Schumaker@netapp.com> | 2014-11-25 13:18:15 -0500 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-11-25 16:38:32 -0500 |
| commit | f4ac1674f5da420ef17896f0f222c5215ebcde80 (patch) | |
| tree | 5ad22eac7b8ef584ce1b39b618aeb0b242dcccb7 /fs/nfs/nfs4file.c | |
| parent | e9f456ca50e579dfacd996f50637f0bb0a585dfc (diff) | |
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/nfs4file.c')
| -rw-r--r-- | fs/nfs/nfs4file.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index c51fb4db9bfe..f78e9fd0735a 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 +136,29 @@ 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) + return -EOPNOTSUPP; + + ret = inode_newsize_ok(inode, offset + len); + if (ret < 0) + return ret; + + mutex_lock(&inode->i_mutex); + 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 +180,9 @@ 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, }; |