[PATCH] ext4: notify sysfs on errors_count value change
STALE1927d
LANDED
From: Jonathan Davies <hidden>
Date: 2021-06-11 14:02:50
Also in:
lkml
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
Landed in mainline as d578b99443fd on 2021-06-30.
After s_error_count is incremented, signal the change in the corresponding sysfs attribute via sysfs_notify. This allows userspace to poll() on changes to /sys/fs/ext4/*/errors_count. Signed-off-by: Jonathan Davies <redacted> --- fs/ext4/ext4.h | 1 + fs/ext4/super.c | 1 + fs/ext4/sysfs.c | 7 +++++++ 3 files changed, 9 insertions(+)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 37002663..f313f5be 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h@@ -3614,6 +3614,7 @@ extern const struct inode_operations ext4_symlink_inode_operations; extern const struct inode_operations ext4_fast_symlink_inode_operations; /* sysfs.c */ +extern void ext4_notify_error_sysfs(struct super_block *sb); extern int ext4_register_sysfs(struct super_block *sb); extern void ext4_unregister_sysfs(struct super_block *sb); extern int __init ext4_init_sysfs(void);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d29f6aa..2525239 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c@@ -5579,6 +5579,7 @@ static void ext4_update_super(struct super_block *sb) if (!es->s_error_count) mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); + ext4_notify_error_sysfs(sb); sbi->s_add_error_count = 0; } spin_unlock(&sbi->s_error_lock);
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index 55fcab6..254b7fc 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c@@ -506,6 +506,13 @@ static struct kobj_type ext4_feat_ktype = { .release = (void (*)(struct kobject *))kfree, }; +void ext4_notify_error_sysfs(struct super_block *sb) +{ + struct ext4_sb_info *sbi = EXT4_SB(sb); + + sysfs_notify(&sbi->s_kobj, NULL, "errors_count"); +} + static struct kobject *ext4_root; static struct kobject *ext4_feat;
--
2.9.3