From: Gabriel Krisman Bertazi krisman@collabora.com
[ Upstream commit 9a089b21f79b47eed240d4da7ea0d049de7c9b4d ]
Send a FS_ERROR message via fsnotify to a userspace monitoring tool whenever a ext4 error condition is triggered. This follows the existing error conditions in ext4, so it is hooked to the ext4_error* functions.
Link: https://lore.kernel.org/r/20211025192746.66445-30-krisman@collabora.com Signed-off-by: Gabriel Krisman Bertazi krisman@collabora.com Acked-by: Theodore Ts'o tytso@mit.edu Reviewed-by: Amir Goldstein amir73il@gmail.com Reviewed-by: Jan Kara jack@suse.cz Signed-off-by: Jan Kara jack@suse.cz [Ajay: - Modified to apply on v5.10.y - Added fsnotify for __ext4_abort()] Signed-off-by: Ajay Kaher ajay.kaher@broadcom.com --- fs/ext4/super.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 18a493f..02236f2 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -46,6 +46,7 @@ #include <linux/part_stat.h> #include <linux/kthread.h> #include <linux/freezer.h> +#include <linux/fsnotify.h>
#include "ext4.h" #include "ext4_extents.h" /* Needed for trace points definition */ @@ -699,6 +700,7 @@ void __ext4_error(struct super_block *sb, const char *function, sb->s_id, function, line, current->comm, &vaf); va_end(args); } + fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); save_error_info(sb, error, 0, block, function, line); ext4_handle_error(sb); } @@ -730,6 +732,7 @@ void __ext4_error_inode(struct inode *inode, const char *function, current->comm, &vaf); va_end(args); } + fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); save_error_info(inode->i_sb, error, inode->i_ino, block, function, line); ext4_handle_error(inode->i_sb); @@ -769,6 +772,7 @@ void __ext4_error_file(struct file *file, const char *function, current->comm, path, &vaf); va_end(args); } + fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); save_error_info(inode->i_sb, EFSCORRUPTED, inode->i_ino, block, function, line); ext4_handle_error(inode->i_sb); @@ -837,7 +841,7 @@ void __ext4_std_error(struct super_block *sb, const char *function, printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", sb->s_id, function, line, errstr); } - + fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); save_error_info(sb, -errno, 0, 0, function, line); ext4_handle_error(sb); } @@ -861,6 +865,7 @@ void __ext4_abort(struct super_block *sb, const char *function, if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) return;
+ fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); save_error_info(sb, error, 0, 0, function, line); va_start(args, fmt); vaf.fmt = fmt;