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android_kernel_oneplus_msm8998/Documentation/ABI/testing/sysfs-fs-f2fs
Jaegeuk Kim 24a2d90393 f2fs/fscrypt: updates to v4.17-rc1 
Pull f2fs update from Jaegeuk Kim:
 "In this round, we've mainly focused on performance tuning and critical
  bug fixes occurred in low-end devices. Sheng Yong introduced
  lost_found feature to keep missing files during recovery instead of
  thrashing them. We're preparing coming fsverity implementation. And,
  we've got more features to communicate with users for better
  performance. In low-end devices, some memory-related issues were
  fixed, and subtle race condtions and corner cases were addressed as
  well.

  Enhancements:
   - large nat bitmaps for more free node ids
   - add three block allocation policies to pass down write hints given by user
   - expose extension list to user and introduce hot file extension
   - tune small devices seamlessly for low-end devices
   - set readdir_ra by default
   - give more resources under gc_urgent mode regarding to discard and cleaning
   - introduce fsync_mode to enforce posix or not
   - nowait aio support
   - add lost_found feature to keep dangling inodes
   - reserve bits for future fsverity feature
   - add test_dummy_encryption for FBE

  Bug fixes:
   - don't use highmem for dentry pages
   - align memory boundary for bitops
   - truncate preallocated blocks in write errors
   - guarantee i_times on fsync call
   - clear CP_TRIMMED_FLAG correctly
   - prevent node chain loop during recovery
   - avoid data race between atomic write and background cleaning
   - avoid unnecessary selinux violation warnings on resgid option
   - GFP_NOFS to avoid deadlock in quota and read paths
   - fix f2fs_skip_inode_update to allow i_size recovery

  In addition to the above, there are several minor bug fixes and clean-ups"

Cherry-pick from origin/upstream-f2fs-stable-linux-4.4.y:

42bf67fc54 f2fs: remain written times to update inode during fsync
6cb5aa02bf f2fs: make assignment of t->dentry_bitmap more readable
a8d07f1f9c f2fs: truncate preallocated blocks in error case
86444d6006 f2fs: fix a wrong condition in f2fs_skip_inode_update
db2188a687 f2fs: reserve bits for fs-verity
ee2e74b3f0 f2fs: Add a segment type check in inplace write
0192e0a450 f2fs: no need to initialize zero value for GFP_F2FS_ZERO
49338842e9 f2fs: don't track new nat entry in nat set
d6a69d5e65 f2fs: clean up with F2FS_BLK_ALIGN
2c8834a7a2 f2fs: check blkaddr more accuratly before issue a bio
6ab573a9d9 f2fs: Set GF_NOFS in read_cache_page_gfp while doing f2fs_quota_read
7419dcb8be f2fs: introduce a new mount option test_dummy_encryption
9321e22c03 f2fs: introduce F2FS_FEATURE_LOST_FOUND feature
8a57196158 f2fs: release locks before return in f2fs_ioc_gc_range()
739ace131c f2fs: align memory boundary for bitops
4c55abe4f8 f2fs: remove unneeded set_cold_node()
30654507e0 f2fs: add nowait aio support
d909e94106 f2fs: wrap all options with f2fs_sb_info.mount_opt
5738be52b3 f2fs: Don't overwrite all types of node to keep node chain
0bdeb167c8 f2fs: introduce mount option for fsync mode
6bc490f0ee f2fs: fix to restore old mount option in ->remount_fs
0c9c3e0344 f2fs: wrap sb_rdonly with f2fs_readonly
6c6611223a f2fs: avoid selinux denial on CAP_SYS_RESOURCE
076a6f32fe f2fs: support hot file extension
58edcdbca6 f2fs: fix to avoid race in between atomic write and background GC
1e0aeb0af9 f2fs: do gc in greedy mode for whole range if gc_urgent mode is set
10b2d001d6 f2fs: issue discard aggressively in the gc_urgent mode
a5052f32b9 f2fs: set readdir_ra by default
1aa536a624 f2fs: add auto tuning for small devices
0ffdffc8f1 f2fs: add mount option for segment allocation policy
b798298912 f2fs: don't stop GC if GC is contended
766d232169 f2fs: expose extension_list sysfs entry
98b329de50 f2fs: fix to set KEEP_SIZE bit in f2fs_zero_range
4d409fa334 f2fs: introduce sb_lock to make encrypt pwsalt update exclusive
1f6bac14c1 f2fs: remove redundant initialization of pointer 'p'
946aefc754 f2fs: flush cp pack except cp pack 2 page at first
e5081a52ac f2fs: clean up f2fs_sb_has_xxx functions
a292477154 f2fs: remove redundant check of page type when submit bio
190e64a819 f2fs: fix to handle looped node chain during recovery
889d980876 f2fs: handle quota for orphan inodes
92b12bb1a2 f2fs: support passing down write hints to block layer with F2FS policy
22fa74c2b0 f2fs: support passing down write hints given by users to block layer
180900373e f2fs: fix to clear CP_TRIMMED_FLAG
0671fae134 f2fs: support large nat bitmap
eceb943d5d f2fs: fix to check extent cache in f2fs_drop_extent_tree
2e2a339c98 f2fs: restrict inline_xattr_size configuration
41dda11641 f2fs: fix heap mode to reset it back
39575737bb f2fs: fix potential corruption in area before F2FS_SUPER_OFFSET
7e0e7995ee fscrypt: fix build with pre-4.6 gcc versions
31d3279a4f fscrypt: fix up fscrypt_fname_encrypted_size() for internal use
82bec88856 fscrypt: define fscrypt_fname_alloc_buffer() to be for presented names
168a907828 fscrypt: calculate NUL-padding length in one place only
042ae9f4cf fscrypt: move fscrypt_symlink_data to fscrypt_private.h
f9550c24c2 fscrypt: remove fscrypt_fname_usr_to_disk()
7ac4756a24 f2fs: switch to fscrypt_get_symlink()
6b76f58e24 f2fs: switch to fscrypt ->symlink() helper functions
fd457d2c4e fscrypt: new helper function - fscrypt_get_symlink()
a1cdacb7ae fscrypt: new helper functions for ->symlink()
7f43602f4d fscrypt: trim down fscrypt.h includes
d9cadc11bd fscrypt: move fscrypt_is_dot_dotdot() to fs/crypto/fname.c
e6fe930580 fscrypt: move fscrypt_valid_enc_modes() to fscrypt_private.h
efefa434f4 fscrypt: move fscrypt_operations declaration to fscrypt_supp.h
7ed178bc8a fscrypt: split fscrypt_dummy_context_enabled() into supp/notsupp versions
3f16e09dad fscrypt: move fscrypt_ctx declaration to fscrypt_supp.h
8216a0b51a fscrypt: move fscrypt_info_cachep declaration to fscrypt_private.h
dfe0b3b1b6 fscrypt: move fscrypt_control_page() to supp/notsupp headers
3a2c791778 fscrypt: move fscrypt_has_encryption_key() to supp/notsupp headers

Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
2018-04-12 09:58:05 -07:00

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What: /sys/fs/f2fs/<disk>/gc_max_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the maximun sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_min_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the minimum sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the default sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_idle
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the victim selection policy for garbage collection.
What: /sys/fs/f2fs/<disk>/reclaim_segments
Date: October 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the issue rate of segment discard commands.
What: /sys/fs/f2fs/<disk>/ipu_policy
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the in-place-update policy.
What: /sys/fs/f2fs/<disk>/min_ipu_util
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the FS utilization condition for the in-place-update
policies.
What: /sys/fs/f2fs/<disk>/min_fsync_blocks
Date: September 2014
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the dirty page count condition for the in-place-update
policies.
What: /sys/fs/f2fs/<disk>/min_hot_blocks
Date: March 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the dirty page count condition for redefining hot data.
What: /sys/fs/f2fs/<disk>/min_ssr_sections
Date: October 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls the fee section threshold to trigger SSR allocation.
What: /sys/fs/f2fs/<disk>/max_small_discards
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the issue rate of small discard commands.
What: /sys/fs/f2fs/<disk>/discard_granularity
Date: July 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls discard granularity of inner discard thread, inner thread
will not issue discards with size that is smaller than granularity.
The unit size is one block, now only support configuring in range
of [1, 512].
What: /sys/fs/f2fs/<disk>/max_victim_search
Date: January 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the number of trials to find a victim segment.
What: /sys/fs/f2fs/<disk>/dir_level
Date: March 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the directory level for large directory.
What: /sys/fs/f2fs/<disk>/ram_thresh
Date: March 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the memory footprint used by f2fs.
What: /sys/fs/f2fs/<disk>/trim_sections
Date: February 2015
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the trimming rate in batch mode.
What: /sys/fs/f2fs/<disk>/cp_interval
Date: October 2015
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the checkpoint timing.
What: /sys/fs/f2fs/<disk>/idle_interval
Date: January 2016
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the idle timing.
What: /sys/fs/f2fs/<disk>/iostat_enable
Date: August 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls to enable/disable IO stat.
What: /sys/fs/f2fs/<disk>/ra_nid_pages
Date: October 2015
Contact: "Chao Yu" <chao2.yu@samsung.com>
Description:
Controls the count of nid pages to be readaheaded.
What: /sys/fs/f2fs/<disk>/dirty_nats_ratio
Date: January 2016
Contact: "Chao Yu" <chao2.yu@samsung.com>
Description:
Controls dirty nat entries ratio threshold, if current
ratio exceeds configured threshold, checkpoint will
be triggered for flushing dirty nat entries.
What: /sys/fs/f2fs/<disk>/lifetime_write_kbytes
Date: January 2016
Contact: "Shuoran Liu" <liushuoran@huawei.com>
Description:
Shows total written kbytes issued to disk.
What: /sys/fs/f2fs/<disk>/feature
Date: July 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Shows all enabled features in current device.
What: /sys/fs/f2fs/<disk>/inject_rate
Date: May 2016
Contact: "Sheng Yong" <shengyong1@huawei.com>
Description:
Controls the injection rate.
What: /sys/fs/f2fs/<disk>/inject_type
Date: May 2016
Contact: "Sheng Yong" <shengyong1@huawei.com>
Description:
Controls the injection type.
What: /sys/fs/f2fs/<disk>/reserved_blocks
Date: June 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls target reserved blocks in system, the threshold
is soft, it could exceed current available user space.
What: /sys/fs/f2fs/<disk>/current_reserved_blocks
Date: October 2017
Contact: "Yunlong Song" <yunlong.song@huawei.com>
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Shows current reserved blocks in system, it may be temporarily
smaller than target_reserved_blocks, but will gradually
increase to target_reserved_blocks when more free blocks are
freed by user later.
What: /sys/fs/f2fs/<disk>/gc_urgent
Date: August 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Do background GC agressively
What: /sys/fs/f2fs/<disk>/gc_urgent_sleep_time
Date: August 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls sleep time of GC urgent mode
What: /sys/fs/f2fs/<disk>/readdir_ra
Date: November 2017
Contact: "Sheng Yong" <shengyong1@huawei.com>
Description:
Controls readahead inode block in readdir.
What: /sys/fs/f2fs/<disk>/extension_list
Date: Feburary 2018
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Used to control configure extension list:
- Query: cat /sys/fs/f2fs/<disk>/extension_list
- Add: echo '[h/c]extension' > /sys/fs/f2fs/<disk>/extension_list
- Del: echo '[h/c]!extension' > /sys/fs/f2fs/<disk>/extension_list
- [h] means add/del hot file extension
- [c] means add/del cold file extension
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