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authorChao Yu <chao2.yu@samsung.com>2015-01-23 20:36:04 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2015-02-11 17:04:35 -0800
commitd49f3e890290bd1db047d02335401026d1886472 (patch)
tree37195404f8492f5fa2620db857b3fa0160a44214 /fs/f2fs
parentbc4a1f873b9db010f5b0971ee5f2987d9be32c36 (diff)
f2fs: add F2FS_IOC_GETVERSION support
In this patch we add the FS_IOC_GETVERSION ioctl for getting i_generation from inode, after that, users can list file's generation number by using "lsattr -v". Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/f2fs.h1
-rw-r--r--fs/f2fs/file.c9
2 files changed, 10 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 1795ce231118..5e16085d98d3 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -202,6 +202,7 @@ static inline bool __has_cursum_space(struct f2fs_summary_block *sum, int size,
*/
#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
+#define F2FS_IOC_GETVERSION FS_IOC_GETVERSION
#define F2FS_IOCTL_MAGIC 0xf5
#define F2FS_IOC_START_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 1)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 710adc987937..ec17d05d6553 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -926,6 +926,13 @@ out:
return ret;
}
+static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
+{
+ struct inode *inode = file_inode(filp);
+
+ return put_user(inode->i_generation, (int __user *)arg);
+}
+
static int f2fs_ioc_start_atomic_write(struct file *filp)
{
struct inode *inode = file_inode(filp);
@@ -1061,6 +1068,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return f2fs_ioc_getflags(filp, arg);
case F2FS_IOC_SETFLAGS:
return f2fs_ioc_setflags(filp, arg);
+ case F2FS_IOC_GETVERSION:
+ return f2fs_ioc_getversion(filp, arg);
case F2FS_IOC_START_ATOMIC_WRITE:
return f2fs_ioc_start_atomic_write(filp);
case F2FS_IOC_COMMIT_ATOMIC_WRITE: