jffs2: allow to complete xattr integrity check on first GC scan

Unlike file data integrity the xattr data integrity was not checked
before some explicit access to the attribute was made.

This could leave in the system a number of corrupted extended attributes
which will be detected only at access time and possibly at a very late
time compared to the time the corruption actually happened.

This patch adds the ability to check for extended attribute integrity
on first GC scan pass (similar to file data integrity check). This allows
for all present attributes to be completly verified before any use of them.

In order to work correctly this patch also needs the patch allowing
JFFS2 to discriminate between recoverable and non recoverable errors
on extended attributes.

Signed-off-by: Jean-Christophe DUBOIS <jcd@tribudubois.net>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 3833d74f2305b9fd35fb08f7878d5fdfe1239de2..1ea349fff68b625389c5647f03094ef56f5e4262 100644 (file)
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -1421,6 +1421,7 @@ int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *i
                mutex_unlock(&f->sem);
                jffs2_do_clear_inode(c, f);
        }
+       jffs2_xattr_do_crccheck_inode(c, ic);
        kfree (f);
        return ret;
 }

diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c
index c18c0ab70ea4e2899f4a10309ea7a8e352b8123e..3034e970eb9a130cea79d7d413aa2463070408ff 100644 (file)
--- a/fs/jffs2/xattr.c
+++ b/fs/jffs2/xattr.c
@@ -437,6 +437,8 @@ static void unrefer_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datu
  *   is called to release xattr related objects when unmounting. 
  * check_xattr_ref_inode(c, ic)
  *   is used to confirm inode does not have duplicate xattr name/value pair.
+ * jffs2_xattr_do_crccheck_inode(c, ic)
+ *   is used to force xattr data integrity check during the initial gc scan.
  * -------------------------------------------------- */
 static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)
 {
@@ -684,6 +686,11 @@ static int check_xattr_ref_inode(struct jffs2_sb_info *c, struct jffs2_inode_cac
        return rc;
 }
 
+void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)
+{
+       check_xattr_ref_inode(c, ic);
+}
+
 /* -------- xattr subsystem functions ---------------
  * jffs2_init_xattr_subsystem(c)
  *   is used to initialize semaphore and list_head, and some variables.

diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h
index 7be4beb306f3ff06eb6df2a8427ca31cb2027e6f..467ff376ee265041b40d94d30ee73c6b7edae4aa 100644 (file)
--- a/fs/jffs2/xattr.h
+++ b/fs/jffs2/xattr.h
@@ -77,6 +77,7 @@ extern void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c);
 extern struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,
                                                         uint32_t xid, uint32_t version);
 
+extern void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
 extern void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
 extern void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
 
@@ -108,6 +109,7 @@ extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
 #define jffs2_build_xattr_subsystem(c)
 #define jffs2_clear_xattr_subsystem(c)
 
+#define jffs2_xattr_do_crccheck_inode(c, ic)
 #define jffs2_xattr_delete_inode(c, ic)
 #define jffs2_xattr_free_inode(c, ic)
 #define jffs2_verify_xattr(c)                  (1)