kernel/git/stable/linux.git/fs/f2fs/sysfs.c, branch linux-6.8.y

f2fs: show more discard status by sysfs

2023-12-26T21:07:26+00:00

The current pending_discard attr just only shows the discard_cmd_cnt information. More discard status can be shown so that we can check them through sysfs when needed. Signed-off-by: Zhiguo Niu Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: Constrain the modification range of dir_level in the sysfs

2023-12-26T21:06:32+00:00

The {struct f2fs_sb_info}->dir_level can be modified through the sysfs interface, but its value range is not limited. If the value exceeds MAX_DIR_HASH_DEPTH and the mount options include "noinline_dentry", the following error will occur: [root@fedora ~]# mount -o noinline_dentry /dev/sdb /mnt/sdb/ [root@fedora ~]# echo 128 > /sys/fs/f2fs/sdb/dir_level [root@fedora ~]# cd /mnt/sdb/ [root@fedora sdb]# mkdir test [root@fedora sdb]# cd test/ [root@fedora test]# mkdir test mkdir: cannot create directory 'test': Argument list too long Signed-off-by: Yongpeng Yang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: sysfs: support discard_io_aware

2023-11-28T18:59:51+00:00

It gives a way to enable/disable IO aware feature for background discard, so that we can tune background discard more precisely based on undiscard condition. e.g. force to disable IO aware if there are large number of discard extents, and discard IO may always be interrupted by frequent common IO. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix to account cp stats correctly

2023-08-14T20:42:05+00:00

cp_foreground_calls sysfs entry shows total CP call count rather than foreground CP call count, fix it. Fixes: fc7100ea2a52 ("f2fs: Add f2fs stats to sysfs") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix to account gc stats correctly

2023-08-14T20:41:57+00:00

As reported, status debugfs entry shows inconsistent GC stats as below: GC calls: 6008 (BG: 6161) - data segments : 3053 (BG: 3053) - node segments : 2955 (BG: 2955) Total GC calls is larger than BGGC calls, the reason is: - f2fs_stat_info.call_count accounts total migrated section count by f2fs_gc() - f2fs_stat_info.bg_gc accounts total call times of f2fs_gc() from background gc_thread Another issue is gc_foreground_calls sysfs entry shows total GC call count rather than FGGC call count. This patch changes as below for fix: - account GC calls and migrated segment count separately - support to account migrated section count if it enables large section mode - fix to show correct value in gc_foreground_calls sysfs entry Fixes: fc7100ea2a52 ("f2fs: Add f2fs stats to sysfs") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: refactor struct f2fs_attr macro

2023-06-26T13:21:41+00:00

This patch provides a large number of variants of F2FS_RW_ATTR and F2FS_RO_ATTR macros, reducing the number of parameters required to initialize the f2fs_attr structure. Reported-by: kernel test robot Link: https://lore.kernel.org/oe-kbuild-all/202304152234.wjaY3IYm-lkp@intel.com/ Signed-off-by: Yangtao Li Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: add sanity check for proc_mkdir

2023-05-08T18:18:04+00:00

Return -ENOMEM when proc_mkdir failed. Signed-off-by: Yangtao Li Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: remove bulk remove_proc_entry() and unnecessary kobject_del()

2023-04-17T21:49:30+00:00

Convert to use remove_proc_subtree() and kill kobject_del() directly. kobject_put() actually covers kobject removal automatically, which is single stage removal. Signed-off-by: Yangtao Li Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: convert to use sysfs_emit

2023-04-10T17:58:45+00:00

Let's use sysfs_emit. Signed-off-by: Yangtao Li Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix iostat lock protection

2023-04-04T20:57:30+00:00

Made iostat lock irq safe to avoid potentinal deadlock. Deadlock scenario: f2fs_attr_store -> f2fs_sbi_store -> _sbi_store -> spin_lock(sbi->iostat_lock) -> scsi_end_request -> bio_endio -> f2fs_dio_read_end_io -> f2fs_update_iostat -> spin_lock_irqsave(sbi->iostat_lock) ===> Dead lock here Fixes: 61803e984307 ("f2fs: fix iostat related lock protection") Fixes: a1e09b03e6f5 ("f2fs: use iomap for direct I/O") Signed-off-by: Qilin Tan Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim