2 files changed, 50 insertions, 21 deletions

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 36a467ca1622..f8fece43f6c6 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -86,7 +86,6 @@ static int udf_remount_fs(struct super_block *, int *, char *);
 static int udf_check_valid(struct super_block *, int, int);
 static int udf_vrs(struct super_block *sb, int silent);
 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
-static void udf_find_anchor(struct super_block *);
 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
                             struct kernel_lb_addr *);
 static void udf_load_fileset(struct super_block *, struct buffer_head *,
@@ -260,7 +259,7 @@ static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
 
         if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
                 seq_puts(seq, ",nostrict");
-        if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE)
+        if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
                 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
                 seq_puts(seq, ",unhide");
@@ -416,7 +415,6 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
         int option;
 
         uopt->novrs = 0;
-        uopt->blocksize = UDF_DEFAULT_BLOCKSIZE;
         uopt->partition = 0xFFFF;
         uopt->session = 0xFFFFFFFF;
         uopt->lastblock = 0;
@@ -444,6 +442,7 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
                         if (match_int(&args[0], &option))
                                 return 0;
                         uopt->blocksize = option;
+                        uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
                         break;
                 case Opt_unhide:
                         uopt->flags |= (1 << UDF_FLAG_UNHIDE);
@@ -789,12 +788,13 @@ static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock)
  * Return 1 if not found, 0 if ok
  *
  */
-static void udf_find_anchor(struct super_block *sb)
+static int udf_find_anchor(struct super_block *sb)
 {
         sector_t lastblock;
         struct buffer_head *bh = NULL;
         uint16_t ident;
         int i;
+        int anchor_found = 0;
         struct udf_sb_info *sbi = UDF_SB(sb);
 
         lastblock = udf_scan_anchors(sb, sbi->s_last_block);
@@ -832,10 +832,13 @@ check_anchor:
                         brelse(bh);
                         if (ident != TAG_IDENT_AVDP)
                                 sbi->s_anchor[i] = 0;
+                        else
+                                anchor_found = 1;
                 }
         }
 
         sbi->s_last_block = lastblock;
+        return anchor_found;
 }
 
 static int udf_find_fileset(struct super_block *sb,
@@ -1721,6 +1724,32 @@ static int udf_check_valid(struct super_block *sb, int novrs, int silent)
         return !block;
 }
 
+static int udf_check_volume(struct super_block *sb,
+                            struct udf_options *uopt, int silent)
+{
+        struct udf_sb_info *sbi = UDF_SB(sb);
+
+        if (!sb_set_blocksize(sb, uopt->blocksize)) {
+                if (!silent)
+                        printk(KERN_WARNING "UDF-fs: Bad block size\n");
+                return 0;
+        }
+        sbi->s_last_block = uopt->lastblock;
+        if (udf_check_valid(sb, uopt->novrs, silent)) {
+                if (!silent)
+                        printk(KERN_WARNING "UDF-fs: No VRS found\n");
+                return 0;
+        }
+        sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
+        sbi->s_anchor[2] = uopt->anchor;
+        if (!udf_find_anchor(sb)) {
+                if (!silent)
+                        printk(KERN_WARNING "UDF-fs: No anchor found\n");
+                return 0;
+        }
+        return 1;
+}
+
 static int udf_load_sequence(struct super_block *sb, struct kernel_lb_addr *fileset)
 {
         struct anchorVolDescPtr *anchor;
@@ -1889,6 +1918,7 @@ static void udf_free_partition(struct udf_part_map *map)
 static int udf_fill_super(struct super_block *sb, void *options, int silent)
 {
         int i;
+        int found_anchor;
         struct inode *inode = NULL;
         struct udf_options uopt;
         struct kernel_lb_addr rootdir, fileset;
@@ -1941,13 +1971,6 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
         sbi->s_dmode = uopt.dmode;
         sbi->s_nls_map = uopt.nls_map;
 
-        /* Set the block size for all transfers */
-        if (!sb_min_blocksize(sb, uopt.blocksize)) {
-                udf_debug("Bad block size (%d)\n", uopt.blocksize);
-                printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize);
-                goto error_out;
-        }
-
         if (uopt.session == 0xFFFFFFFF)
                 sbi->s_session = udf_get_last_session(sb);
         else
@@ -1955,17 +1978,22 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
 
         udf_debug("Multi-session=%d\n", sbi->s_session);
 
-        sbi->s_last_block = uopt.lastblock;
-        sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
-        sbi->s_anchor[2] = uopt.anchor;
-
-        if (udf_check_valid(sb, uopt.novrs, silent)) {
-                /* read volume recognition sequences */
-                printk(KERN_WARNING "UDF-fs: No VRS found\n");
-                goto error_out;
+        if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
+                found_anchor = udf_check_volume(sb, &uopt, silent);
+        } else {
+                uopt.blocksize = bdev_hardsect_size(sb->s_bdev);
+                found_anchor = udf_check_volume(sb, &uopt, silent);
+                if (!found_anchor && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
+                        if (!silent)
+                                printk(KERN_NOTICE
+                                       "UDF-fs: Rescanning with blocksize "
+                                       "%d\n", UDF_DEFAULT_BLOCKSIZE);
+                        uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
+                        found_anchor = udf_check_volume(sb, &uopt, silent);
+                }
         }
-
-        udf_find_anchor(sb);
+        if (!found_anchor)
+                goto error_out;
 
         /* Fill in the rest of the superblock */
         sb->s_op = &udf_sb_ops;
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 158221ecdc42..2dd921928338 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -30,6 +30,7 @@
 #define UDF_FLAG_GID_SET        16
 #define UDF_FLAG_SESSION_SET    17
 #define UDF_FLAG_LASTBLOCK_SET  18
+#define UDF_FLAG_BLOCKSIZE_SET  19
 
 #define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
 #define UDF_PART_FLAG_UNALLOC_TABLE     0x0002