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...@samsung.com>
---
fs/f2fs/f2fs.h | 1 +
fs/f2fs/file.c | 9 +++++++++
2 files changed, 10 insertions(+)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index c2cf040..92e0b3a 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 0d88a28..5cbbc9a 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);
@@ -1096,6 +1103,8 @@ 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:
--
2.2.1
--
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