linux.git/fs/f2fs/debug.c, branch v5.1

f2fs: no need to check return value of debugfs_create functions

2019-01-09T04:41:09+00:00

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Jaegeuk Kim 
Cc: Chao Yu 
Cc: linux-f2fs-devel@lists.sourceforge.net
Signed-off-by: Greg Kroah-Hartman 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: don't access node/meta inode mapping after iput

2019-01-08T17:34:27+00:00

This fixes wrong access of address spaces of node and meta inodes after iput.

Fixes: 60aa4d5536ab ("f2fs: fix use-after-free issue when accessing sbi->stat_info")
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: correct wrong spelling, issing_*

2018-12-26T23:16:54+00:00

Let's use "queued" instead of "issuing".

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

f2fs: use kvmalloc, if kmalloc is failed

2018-12-26T23:16:53+00:00

One report says memalloc failure during mount.

 (unwind_backtrace) from [] (show_stack+0x10/0x14)
 (show_stack) from [] (dump_stack+0x8c/0xa0)
 (dump_stack) from [] (warn_alloc+0xc4/0x160)
 (warn_alloc) from [] (__alloc_pages_nodemask+0x3f4/0x10d0)
 (__alloc_pages_nodemask) from [] (kmalloc_order_trace+0x2c/0x120)
 (kmalloc_order_trace) from [] (build_node_manager+0x35c/0x688)
 (build_node_manager) from [] (f2fs_fill_super+0xf0c/0x16cc)
 (f2fs_fill_super) from [] (mount_bdev+0x15c/0x188)
 (mount_bdev) from [] (f2fs_mount+0x18/0x20)
 (f2fs_mount) from [] (mount_fs+0x158/0x19c)
 (mount_fs) from [] (vfs_kern_mount+0x78/0x134)
 (vfs_kern_mount) from [] (do_mount+0x474/0xca4)
 (do_mount) from [] (SyS_mount+0x94/0xbc)
 (SyS_mount) from [] (ret_fast_syscall+0x0/0x48)

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

f2fs: add to account direct IO

2018-11-26T23:53:56+00:00

This patch adds f2fs_dio_submit_bio() to hook submit_io/end_io functions
in direct IO path, in order to account DIO.

Later, we will add this count into is_idle() to let background GC/Discard
thread be aware of DIO.

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

f2fs: Change to use DEFINE_SHOW_ATTRIBUTE macro

2018-11-26T23:53:56+00:00

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

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

f2fs: introduce __is_large_section() for cleanup

2018-11-26T23:53:55+00:00

Introduce a wrapper __is_large_section() to clean up codes.

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

f2fs: account read IOs and use IO counts for is_idle

2018-10-23T00:54:46+00:00

This patch adds issued read IO counts which is under block layer.

Chao modified a bit, since:

Below race can cause reversed reference on F2FS_RD_DATA, there is
the same issue in f2fs_submit_page_bio(), fix them by relocate
__submit_bio() and inc_page_count.

Thread A			Thread B
- f2fs_write_begin
 - f2fs_submit_page_read
 - __submit_bio
				- f2fs_read_end_io
				 - __read_end_io
				 - dec_page_count(, F2FS_RD_DATA)
 - inc_page_count(, F2FS_RD_DATA)

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

f2fs: checkpoint disabling

2018-10-16T16:36:39+00:00

Note that, it requires "f2fs: return correct errno in f2fs_gc".

This adds a lightweight non-persistent snapshotting scheme to f2fs.

To use, mount with the option checkpoint=disable, and to return to
normal operation, remount with checkpoint=enable. If the filesystem
is shut down before remounting with checkpoint=enable, it will revert
back to its apparent state when it was first mounted with
checkpoint=disable. This is useful for situations where you wish to be
able to roll back the state of the disk in case of some critical
failure.

Signed-off-by: Daniel Rosenberg 
[Jaegeuk Kim: use SB_RDONLY instead of MS_RDONLY]
Signed-off-by: Jaegeuk Kim

f2fs: add to account skip count of background GC

2018-10-01T01:33:34+00:00

This patch adds to account skip count of background GC, and show stat
info via 'status' debugfs entry.

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