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f2fs: add an ioctl to disable GC for specific file

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This patch gives a flag to disable GC on given file, which would be useful, when
user wants to keep its block map. It also conducts in-place-update for dontmove
file.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2017-12-07 16:25:39 -08:00
parent 9ac1e2d88d
commit 1ad71a2712
7 changed files with 136 additions and 2 deletions
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9
include/linux/f2fs_fs.h
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@ -212,6 +212,7 @@ struct f2fs_extent {
#define F2FS_DATA_EXIST 0x08 /* file inline data exist flag */
#define F2FS_INLINE_DOTS 0x10 /* file having implicit dot dentries */
#define F2FS_EXTRA_ATTR 0x20 /* file having extra attribute */
#define F2FS_PIN_FILE 0x40 /* file should not be gced */
struct f2fs_inode {
__le16 i_mode; /* file mode */
@ -229,7 +230,13 @@ struct f2fs_inode {
__le32 i_ctime_nsec; /* change time in nano scale */
__le32 i_mtime_nsec; /* modification time in nano scale */
__le32 i_generation; /* file version (for NFS) */
__le32 i_current_depth; /* only for directory depth */
union {
__le32 i_current_depth; /* only for directory depth */
__le16 i_gc_failures; /*
* # of gc failures on pinned file.
* only for regular files.
*/
};
__le32 i_xattr_nid; /* nid to save xattr */
__le32 i_flags; /* file attributes */
__le32 i_pino; /* parent inode number */