ext4: implement support for get/set fs label

[sfrench/cifs-2.6.git] / fs / ext4 / ext4.h

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 714201fa9e6f1478a08525c8d0c5468009cdd66d..5c8de74f5b406de1758f30c4334103e73824ea59 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1298,6 +1298,8 @@ extern void ext4_set_bits(void *bm, int cur, int len);
 /* Metadata checksum algorithm codes */
 #define EXT4_CRC32C_CHKSUM             1
 
+#define EXT4_LABEL_MAX                 16
+
 /*
  * Structure of the super block
  */
@@ -1347,7 +1349,7 @@ struct ext4_super_block {
 /*60*/ __le32  s_feature_incompat;     /* incompatible feature set */
        __le32  s_feature_ro_compat;    /* readonly-compatible feature set */
 /*68*/ __u8    s_uuid[16];             /* 128-bit uuid for volume */
-/*78*/ char    s_volume_name[16];      /* volume name */
+/*78*/ char    s_volume_name[EXT4_LABEL_MAX];  /* volume name */
 /*88*/ char    s_last_mounted[64] __nonstring; /* directory where last mounted */
 /*C8*/ __le32  s_algorithm_usage_bitmap; /* For compression */
        /*
@@ -3094,6 +3096,9 @@ extern int ext4_group_extend(struct super_block *sb,
                                struct ext4_super_block *es,
                                ext4_fsblk_t n_blocks_count);
 extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count);
+extern unsigned int ext4_list_backups(struct super_block *sb,
+                                     unsigned int *three, unsigned int *five,
+                                     unsigned int *seven);
 
 /* super.c */
 extern struct buffer_head *ext4_sb_bread(struct super_block *sb,
@@ -3108,6 +3113,8 @@ extern int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait);
 extern void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block);
 extern int ext4_seq_options_show(struct seq_file *seq, void *offset);
 extern int ext4_calculate_overhead(struct super_block *sb);
+extern __le32 ext4_superblock_csum(struct super_block *sb,
+                                  struct ext4_super_block *es);
 extern void ext4_superblock_csum_set(struct super_block *sb);
 extern int ext4_alloc_flex_bg_array(struct super_block *sb,
                                    ext4_group_t ngroup);