Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6

[sfrench/cifs-2.6.git] / fs / ubifs / super.c

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 372c7fb66531b0ab68089c74a2e48c537722c0d5..faa44f90608a26f885208a7b53ff786dcc371f3a 100644 (file)
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1351,8 +1351,9 @@ static int mount_ubifs(struct ubifs_info *c)
        x = (long long)c->log_lebs * c->leb_size + c->max_bud_bytes;
        ubifs_msg("journal size:       %lld bytes (%lld KiB, %lld MiB, %d "
                  "LEBs)", x, x >> 10, x >> 20, c->log_lebs + c->max_bud_cnt);
-       ubifs_msg("media format:       %d (latest is %d)",
-                 c->fmt_version, UBIFS_FORMAT_VERSION);
+       ubifs_msg("media format:       w%d/r%d (latest is w%d/r%d)",
+                 c->fmt_version, c->ro_compat_version,
+                 UBIFS_FORMAT_VERSION, UBIFS_RO_COMPAT_VERSION);
        ubifs_msg("default compressor: %s", ubifs_compr_name(c->default_compr));
        ubifs_msg("reserved for root:  %llu bytes (%llu KiB)",
                c->report_rp_size, c->report_rp_size >> 10);
@@ -1492,6 +1493,15 @@ static int ubifs_remount_rw(struct ubifs_info *c)
 {
        int err, lnum;
 
+       if (c->rw_incompat) {
+               ubifs_err("the file-system is not R/W-compatible");
+               ubifs_msg("on-flash format version is w%d/r%d, but software "
+                         "only supports up to version w%d/r%d", c->fmt_version,
+                         c->ro_compat_version, UBIFS_FORMAT_VERSION,
+                         UBIFS_RO_COMPAT_VERSION);
+               return -EROFS;
+       }
+
        mutex_lock(&c->umount_mutex);
        dbg_save_space_info(c);
        c->remounting_rw = 1;
@@ -2041,7 +2051,8 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
        /* 'fill_super()' opens ubi again so we must close it here */
        ubi_close_volume(ubi);
 
-       return simple_set_mnt(mnt, sb);
+       simple_set_mnt(mnt, sb);
+       return 0;
 
 out_deact:
        up_write(&sb->s_umount);