user/sven/linux.git/include/linux/f2fs_fs.h, branch v4.4.193

f2fs: use crc and cp version to determine roll-forward recovery

2019-01-26T08:42:46Z

commit a468f0ef516fda9c7d91bb550d458e853d76955e upstream. Previously, we used cp_version only to detect recoverable dnodes. In order to avoid same garbage cp_version, we needed to truncate the next dnode during checkpoint, resulting in additional discard or data write. If we can distinguish this by using crc in addition to cp_version, we can remove this overhead. There is backward compatibility concern where it changes node_footer layout. So, this patch introduces a new checkpoint flag, CP_CRC_RECOVERY_FLAG, to detect new layout. New layout will be activated only when this flag is set. Signed-off-by: Jaegeuk Kim [bwh: Backported to 4.4: - Deleted code is slightly different - Adjust context] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman

f2fs: fix to convert inline directory correctly

2019-01-26T08:42:45Z

With below serials, we will lose parts of dirents: 1) mount f2fs with inline_dentry option 2) echo 1 > /sys/fs/f2fs/sdX/dir_level 3) mkdir dir 4) touch 180 files named [1-180] in dir 5) touch 181 in dir 6) echo 3 > /proc/sys/vm/drop_caches 7) ll dir ls: cannot access 2: No such file or directory ls: cannot access 4: No such file or directory ls: cannot access 5: No such file or directory ls: cannot access 6: No such file or directory ls: cannot access 8: No such file or directory ls: cannot access 9: No such file or directory ... total 360 drwxr-xr-x 2 root root 4096 Feb 19 15:12 ./ drwxr-xr-x 3 root root 4096 Feb 19 15:11 ../ -rw-r--r-- 1 root root 0 Feb 19 15:12 1 -rw-r--r-- 1 root root 0 Feb 19 15:12 10 -rw-r--r-- 1 root root 0 Feb 19 15:12 100 -????????? ? ? ? ? ? 101 -????????? ? ? ? ? ? 102 -????????? ? ? ? ? ? 103 ... The reason is: when doing the inline dir conversion, we didn't consider that directory has hierarchical hash structure which can be configured through sysfs interface 'dir_level'. By default, dir_level of directory inode is 0, it means we have one bucket in hash table located in first level, all dirents will be hashed in this bucket, so it has no problem for us to do the duplication simply between inline dentry page and converted normal dentry page. However, if we configured dir_level with the value N (greater than 0), it will expand the bucket number of first level hash table by 2^N - 1, it hashs dirents into different buckets according their hash value, if we still move all dirents to first bucket, it makes incorrent locating for inline dirents, the result is, although we can iterate all dirents through ->readdir, we can't stat some of them in ->lookup which based on hash table searching. This patch fixes this issue by rehashing dirents into correct position when converting inline directory. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim [bwh: Backported to 4.4: - Keep using f2fs_crypto functions instead of generic fscrypt API - Use remove_dirty_dir_inode() instead of remove_dirty_inode() - Adjust context] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman

f2fs: sanity check segment count

2017-05-14T11:32:59Z

commit b9dd46188edc2f0d1f37328637860bb65a771124 upstream. F2FS uses 4 bytes to represent block address. As a result, supported size of disk is 16 TB and it equals to 16 * 1024 * 1024 / 2 segments. Signed-off-by: Jin Qian Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman

f2fs: add annotation for space utilization of regular/inline dentry

2015-08-22T05:45:13Z

Add annotation to let us know more clearly about space utilization information of regular dentry and inline dentry. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs crypto: declare some definitions for f2fs encryption feature

2015-05-28T22:41:45Z

This definitions will be used by inode and superblock for encyption. Signed-off-by: Jaegeuk Kim

f2fs: add feature facility in superblock

2015-05-28T22:41:28Z

This patch introduces a feature in superblock, which will indicate any new features for f2fs. Signed-off-by: Jaegeuk Kim

f2fs: add missing version info in superblock

2015-05-28T22:41:26Z

The mkfs.f2fs remains kernel version in superblock, but f2fs module has not added that so far. Signed-off-by: Jaegeuk Kim

f2fs: add F2FS_INLINE_DOTS to recover missing dot dentries

2015-04-10T22:08:57Z

If f2fs was corrupted with missing dot dentries, it needs to recover them after fsck.f2fs detection. The underlying precedure is: 1. The fsck.f2fs remains F2FS_INLINE_DOTS flag in directory inode, if it detects missing dot dentries. 2. When f2fs looks up the corrupted directory, it triggers f2fs_add_link with proper inode numbers and their dot and dotdot names. 3. Once f2fs recovers the directory without errors, it removes F2FS_INLINE_DOTS finally. Signed-off-by: Jaegeuk Kim

f2fs: simplfy a field name in struct f2fs_extent,extent_info

2015-03-03T17:58:45Z

Rename a filed name from 'blk_addr' to 'blk' in struct {f2fs_extent,extent_info} as annotation of this field descripts its meaning well to us. By this way, we can avoid long statement in code of following patches. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: introduce macros to convert bytes and blocks in f2fs

2015-02-12T01:04:48Z

This patch adds two macros for transition between byte and block offsets. Currently, f2fs only supports 4KB blocks, so use the default size for now. Signed-off-by: Jaegeuk Kim