On Fri, May 21, 2021 at 5:42 AM Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx> wrote: > > 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. > > Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx> Looks fine. Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx> > --- > fs/ext4/super.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/fs/ext4/super.c b/fs/ext4/super.c > index 7dc94f3e18e6..a8c0ac2c3e4c 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 */ > @@ -752,6 +753,8 @@ void __ext4_error(struct super_block *sb, const char *function, > sb->s_id, function, line, current->comm, &vaf); > va_end(args); > } > + fsnotify_error_event(sb, NULL, error); > + > ext4_handle_error(sb, force_ro, error, 0, block, function, line); > } > > @@ -782,6 +785,8 @@ void __ext4_error_inode(struct inode *inode, const char *function, > current->comm, &vaf); > va_end(args); > } > + fsnotify_error_event(inode->i_sb, inode, error); > + > ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, > function, line); > } > @@ -820,6 +825,8 @@ void __ext4_error_file(struct file *file, const char *function, > current->comm, path, &vaf); > va_end(args); > } > + fsnotify_error_event(inode->i_sb, inode, EFSCORRUPTED); > + > ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, > function, line); > } > @@ -887,6 +894,7 @@ 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_error_event(sb, sb->s_root->d_inode, errno); > > ext4_handle_error(sb, false, -errno, 0, 0, function, line); > } > -- > 2.31.0 >
