[PATCH v8 30/32] ext4: Send notifications on error
From: Gabriel Krisman Bertazi <hidden>
Date: 2021-10-19 00:04:39
Also in:
linux-api, linux-fsdevel
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
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. It also follows the current dmesg reporting in the format. The filesystem message is composed mostly by the string that would be otherwise printed in dmesg. A new ext4 specific record format is exposed in the uapi, such that a monitoring tool knows what to expect when listening errors of an ext4 filesystem. Reviewed-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Gabriel Krisman Bertazi <redacted> --- Changes since v6: - Report ext4_std_errors agains superblock (jan) --- fs/ext4/super.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 88d5d274a868..67183e6b1920 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 */
@@ -759,6 +760,8 @@ 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); + ext4_handle_error(sb, force_ro, error, 0, block, function, line); }
@@ -789,6 +792,8 @@ void __ext4_error_inode(struct inode *inode, const char *function, current->comm, &vaf); va_end(args); } + fsnotify_sb_error(inode->i_sb, inode, error); + ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, function, line); }
@@ -827,6 +832,8 @@ 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); + ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, function, line); }
@@ -894,6 +901,7 @@ 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); ext4_handle_error(sb, false, -errno, 0, 0, function, line); }
--
2.33.0