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ext4: make s_mount_flags modifications atomic

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Fast commit file system states are recorded in
sbi->s_mount_flags. Fast commit expects these bit manipulations to be
atomic. This patch adds helpers to make those modifications atomic.

Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201106035911.1942128-21-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Harshad Shirwadkar 2020-11-05 19:59:09 -08:00 • committed by Theodore Ts'o
parent da0c5d2695
commit 9b5f6c9b83
7 changed files with 52 additions and 34 deletions
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4
fs/ext4/inode.c
View file

@ -2442,7 +2442,7 @@ static int mpage_map_and_submit_extent(handle_t *handle,
struct super_block *sb = inode->i_sb;
if (ext4_forced_shutdown(EXT4_SB(sb)) ||
EXT4_SB(sb)->s_mount_flags & EXT4_MF_FS_ABORTED)
ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED))
goto invalidate_dirty_pages;
/*
* Let the uper layers retry transient errors.
@ -2676,7 +2676,7 @@ static int ext4_writepages(struct address_space *mapping,
* the stack trace.
*/
if (unlikely(ext4_forced_shutdown(EXT4_SB(mapping->host->i_sb)) ||
sbi->s_mount_flags & EXT4_MF_FS_ABORTED)) {
ext4_test_mount_flag(inode->i_sb, EXT4_MF_FS_ABORTED))) {
ret = -EROFS;
goto out_writepages;
}