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  1. 26 7月, 2020 3 次提交
  3. 24 7月, 2020 2 次提交
  5. 22 7月, 2020 2 次提交
    • D
      f2fs: add F2FS_IOC_SEC_TRIM_FILE ioctl · 9af84648
      由 Daeho Jeong 提交于 
      Added a new ioctl to send discard commands or/and zero out
to selected data area of a regular file for security reason.

The way of handling range.len of F2FS_IOC_SEC_TRIM_FILE:
1. Added -1 value support for range.len to secure trim the whole blocks
   starting from range.start regardless of i_size.
2. If the end of the range passes over the end of file, it means until
   the end of file (i_size).
3. ignored the case of that range.len is zero to prevent the function
   from making end_addr zero and triggering different behaviour of
   the function.
Signed-off-by: NDaeho Jeong <daehojeong@google.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      9af84648
    • J
      f2fs: should avoid inode eviction in synchronous path · b0f3b87f
      由 Jaegeuk Kim 提交于 
      https://bugzilla.kernel.org/show_bug.cgi?id=208565

PID: 257    TASK: ecdd0000  CPU: 0   COMMAND: "init"
  #0 [<c0b420ec>] (__schedule) from [<c0b423c8>]
  #1 [<c0b423c8>] (schedule) from [<c0b459d4>]
  #2 [<c0b459d4>] (rwsem_down_read_failed) from [<c0b44fa0>]
  #3 [<c0b44fa0>] (down_read) from [<c044233c>]
  #4 [<c044233c>] (f2fs_truncate_blocks) from [<c0442890>]
  #5 [<c0442890>] (f2fs_truncate) from [<c044d408>]
  #6 [<c044d408>] (f2fs_evict_inode) from [<c030be18>]
  #7 [<c030be18>] (evict) from [<c030a558>]
  #8 [<c030a558>] (iput) from [<c047c600>]
  #9 [<c047c600>] (f2fs_sync_node_pages) from [<c0465414>]
 #10 [<c0465414>] (f2fs_write_checkpoint) from [<c04575f4>]
 #11 [<c04575f4>] (f2fs_sync_fs) from [<c0441918>]
 #12 [<c0441918>] (f2fs_do_sync_file) from [<c0441098>]
 #13 [<c0441098>] (f2fs_sync_file) from [<c0323fa0>]
 #14 [<c0323fa0>] (vfs_fsync_range) from [<c0324294>]
 #15 [<c0324294>] (do_fsync) from [<c0324014>]
 #16 [<c0324014>] (sys_fsync) from [<c0108bc0>]

This can be caused by flush_dirty_inode() in f2fs_sync_node_pages() where
iput() requires f2fs_lock_op() again resulting in livelock.
Reported-by: NZhiguo Niu <Zhiguo.Niu@unisoc.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      b0f3b87f
  7. 21 7月, 2020 3 次提交
  9. 09 7月, 2020 5 次提交
  11. 08 7月, 2020 22 次提交
  13. 19 6月, 2020 3 次提交
    • W
      f2fs: use kfree() to free variables allocated by match_strdup() · ba87a45c
      由 Wang Xiaojun 提交于 
      Use kfree() instead of kvfree() to free variables allocated
by match_strdup(). Because the memory is allocated with kmalloc
inside match_strdup().
Signed-off-by: NWang Xiaojun <wangxiaojun11@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      ba87a45c
    • J
      f2fs: get the right gc victim section when section has several segments · da52f8ad
      由 Jack Qiu 提交于 
      Assume each section has 4 segment:
     .___________________________.
     |_Segment0_|_..._|_Segment3_|
     .                          .
     .                  .
     .__________.
     |_section0_|

Segment 0~2 has 0 valid block, segment 3 has 512 valid blocks.
It will fail if we want to gc section0 in this scenes,
because all 4 segments in section0 is not dirty.
So we should use dirty section bitmap instead of dirty segment bitmap
to get right victim section.
Signed-off-by: NJack Qiu <jack.qiu@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      da52f8ad
    • W
      f2fs: fix a race condition between f2fs_write_end_io and f2fs_del_fsync_node_entry · db5ae363
      由 Wuyun Zhao 提交于 
      Under some condition, the __write_node_page will submit a page which is not
f2fs_in_warm_node_list and will not call f2fs_add_fsync_node_entry.
f2fs_gc continue to run to invoke f2fs_iget -> do_read_inode to read the same node page
and set code node, which make f2fs_in_warm_node_list become true,
that will cause f2fs_bug_on in f2fs_del_fsync_node_entry when f2fs_write_end_io called.

- f2fs_write_end_io
					- f2fs_iget
					 - do_read_inode
					  - set_cold_node
					  recover cold node flag
 - f2fs_in_warm_node_list
  - is_cold_node
  if node is cold, assume we have added
  node to fsync_node_list during writepages()
 - f2fs_del_fsync_node_entry
  - f2fs_bug_on() due to node page
  is not in fsync_node_list

[   34.966133] Call trace:
[   34.969902]  f2fs_del_fsync_node_entry+0x100/0x108
[   34.976071]  f2fs_write_end_io+0x1e0/0x288
[   34.981539]  bio_endio+0x248/0x270
[   34.986289]  blk_update_request+0x2b0/0x4d8
[   34.991841]  scsi_end_request+0x40/0x440
[   34.997126]  scsi_io_completion+0xa4/0x748
[   35.002593]  scsi_finish_command+0xdc/0x110
[   35.008143]  scsi_softirq_done+0x118/0x150
[   35.013610]  blk_done_softirq+0x8c/0xe8
[   35.018811]  __do_softirq+0x2e8/0x578
[   35.023828]  irq_exit+0xfc/0x120
[   35.028398]  handle_IPI+0x1d8/0x330
[   35.033233]  gic_handle_irq+0x110/0x1d4
[   35.038433]  el1_irq+0xb4/0x130
[   35.042917]  kmem_cache_alloc+0x3f0/0x418
[   35.048288]  radix_tree_node_alloc+0x50/0xf8
[   35.053933]  __radix_tree_create+0xf8/0x188
[   35.059484]  __radix_tree_insert+0x3c/0x128
[   35.065035]  add_gc_inode+0x90/0x118
[   35.069967]  f2fs_gc+0x1b80/0x2d70
[   35.074718]  f2fs_disable_checkpoint+0x94/0x1d0
[   35.080621]  f2fs_fill_super+0x10c4/0x1b88
[   35.086088]  mount_bdev+0x194/0x1e0
[   35.090923]  f2fs_mount+0x40/0x50
[   35.095589]  mount_fs+0xb4/0x190
[   35.100159]  vfs_kern_mount+0x80/0x1d8
[   35.105260]  do_mount+0x478/0xf18
[   35.109926]  ksys_mount+0x90/0xd0
[   35.114592]  __arm64_sys_mount+0x24/0x38
Signed-off-by: NWuyun Zhao <zhaowuyun@wingtech.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      db5ae363