reiserfs: introduce reiserfs_error()

Although reiserfs can currently handle severe errors such as journal failure,
it cannot handle less severe errors like metadata i/o failure. The following
patch adds a reiserfs_error() function akin to the one in ext3.

Subsequent patches will use this new error handler to handle errors more
gracefully in general.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 29 insertions, 0 deletions

diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c
index 84f3f69652e3..8e826c07cd21 100644
--- a/fs/reiserfs/prints.c
+++ b/fs/reiserfs/prints.c
@@ -370,6 +370,31 @@ void __reiserfs_panic(struct super_block *sb, const char *id,
                       id ? id : "", id ? " " : "", function, error_buf);
 }
 
+void __reiserfs_error(struct super_block *sb, const char *id,
+                      const char *function, const char *fmt, ...)
+{
+        do_reiserfs_warning(fmt);
+
+        BUG_ON(sb == NULL);
+
+        if (reiserfs_error_panic(sb))
+                __reiserfs_panic(sb, id, function, error_buf);
+
+        if (id && id[0])
+                printk(KERN_CRIT "REISERFS error (device %s): %s %s: %s\n",
+                       sb->s_id, id, function, error_buf);
+        else
+                printk(KERN_CRIT "REISERFS error (device %s): %s: %s\n",
+                       sb->s_id, function, error_buf);
+
+        if (sb->s_flags & MS_RDONLY)
+                return;
+
+        reiserfs_info(sb, "Remounting filesystem read-only\n");
+        sb->s_flags |= MS_RDONLY;
+        reiserfs_abort_journal(sb, -EIO);
+}
+
 void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...)
 {
         do_reiserfs_warning(fmt);
diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h
index d097966bbd91..6c4af98b6767 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -2006,6 +2006,10 @@ void __reiserfs_panic(struct super_block *s, const char *id,
     __attribute__ ((noreturn));
 #define reiserfs_panic(s, id, fmt, args...) \
         __reiserfs_panic(s, id, __func__, fmt, ##args)
+void __reiserfs_error(struct super_block *s, const char *id,
+                      const char *function, const char *fmt, ...);
+#define reiserfs_error(s, id, fmt, args...) \
+         __reiserfs_error(s, id, __func__, fmt, ##args)
 void reiserfs_info(struct super_block *s, const char *fmt, ...);
 void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...);
 void print_indirect_item(struct buffer_head *bh, int item_num);