linux.git/fs/f2fs/dir.c, branch v4.16

f2fs: recover directory operations by fsync

2018-01-03T03:27:31+00:00

This fixes generic/342 which doesn't recover renamed file which was fsynced
before. It will be done via another fsync on newly created file.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: introduce sysfs readdir_ra to readahead inode block in readdir

2018-01-03T03:27:27+00:00

This patch introduces a sysfs interface readdir_ra to enable/disable
readaheading inode block in f2fs_readdir. When readdir_ra is enabled,
it improves the performance of "readdir + stat".

For 300,000 files:
	time find /data/test > /dev/null
disable readdir_ra: 1m25.69s real  0m01.94s user  0m50.80s system
enable  readdir_ra: 0m18.55s real  0m00.44s user  0m15.39s system

Signed-off-by: Sheng Yong 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: update ctx->pos correctly when hitting hole in directory

2017-10-26T08:44:20+00:00

This patch fixes to update ctx->pos correctly when hitting hole in
directory.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: relocate readahead codes in readdir()

2017-10-26T08:44:19+00:00

Previously, for large directory, we just do readahead only once in
readdir(), readdir()'s performance may drop when traversing latter
blocks. In order to avoid this, relocate readahead codes to covering
all traverse flow.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: allow readdir() to be interrupted

2017-10-26T08:44:18+00:00

This patch follows ext4 to allow readdir() in large empty directory to
be interrupted. Referenced commit of ext4: 1f60fbe72749 ("ext4: allow
readdir()'s of large empty directories to be interrupted").

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: trace f2fs_readdir

2017-10-26T08:44:17+00:00

This patch adds trace for f2fs_readdir.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: clear radix tree dirty tag of pages whose dirty flag is cleared

2017-09-12T04:32:38+00:00

On a senario like writing out the first dirty page of the inode
as the inline data, we only cleared dirty flags of the pages, but
didn't clear the dirty tags of those pages in the radix tree.

If we don't clear the dirty tags of the pages in the radix tree, the
inodes which contain the pages will be marked with I_DIRTY_PAGES again
and again, and writepages() for the inodes will be invoked in every
writeback period. As a result, nothing will be done in every
writepages() for the inodes and it will just consume CPU time
meaninglessly.

Signed-off-by: Daeho Jeong 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: do not set LOST_PINO for newly created dir

2017-07-07T17:34:45+00:00

Since directories will be written back with checkpoint and fsync a
directory will always write CP, there is no need to set LOST_PINO
after creating a directory.

Signed-off-by: Sheng Yong 
Signed-off-by: Jaegeuk Kim

Merge tag 'for-f2fs-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

2017-05-08T19:24:17+00:00

Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've focused on enhancing performance with regards to
  block allocation, GC, and discard/in-place-update IO controls. There
  are a bunch of clean-ups as well as minor bug fixes.

  Enhancements:
   - disable heap-based allocation by default
   - issue small-sized discard commands by default
   - change the policy of data hotness for logging
   - distinguish IOs in terms of size and wbc type
   - start SSR earlier to avoid foreground GC
   - enhance data structures managing discard commands
   - enhance in-place update flow
   - add some more fault injection routines
   - secure one more xattr entry

  Bug fixes:
   - calculate victim cost for GC correctly
   - remain correct victim segment number for GC
   - race condition in nid allocator and initializer
   - stale pointer produced by atomic_writes
   - fix missing REQ_SYNC for flush commands
   - handle missing errors in more corner cases"

* tag 'for-f2fs-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (111 commits)
  f2fs: fix a mount fail for wrong next_scan_nid
  f2fs: enhance scalability of trace macro
  f2fs: relocate inode_{,un}lock in F2FS_IOC_SETFLAGS
  f2fs: Make flush bios explicitely sync
  f2fs: show available_nids in f2fs/status
  f2fs: flush dirty nats periodically
  f2fs: introduce CP_TRIMMED_FLAG to avoid unneeded discard
  f2fs: allow cpc->reason to indicate more than one reason
  f2fs: release cp and dnode lock before IPU
  f2fs: shrink size of struct discard_cmd
  f2fs: don't hold cmd_lock during waiting discard command
  f2fs: nullify fio->encrypted_page for each writes
  f2fs: sanity check segment count
  f2fs: introduce valid_ipu_blkaddr to clean up
  f2fs: lookup extent cache first under IPU scenario
  f2fs: reconstruct code to write a data page
  f2fs: introduce __wait_discard_cmd
  f2fs: introduce __issue_discard_cmd
  f2fs: enable small discard by default
  f2fs: delay awaking discard thread
  ...

f2fs: switch to using fscrypt_match_name()

2017-05-04T15:44:39+00:00

Switch f2fs directory searches to use the fscrypt_match_name() helper
function.  There should be no functional change.

Signed-off-by: Eric Biggers 
Acked-by: Jaegeuk Kim 
Signed-off-by: Theodore Ts'o