diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 48ae98819d3532230d228ec7c1609cdbf9052fba..f7257aa6bf81ba7a461c27cc009745c0708f4907 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -239,8 +239,11 @@ struct ext4_io_submit { # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) #endif #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) +#define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ + EXT4_SB(s)->s_cluster_bits) #ifdef __KERNEL__ # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) +# define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) #else # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) #endif @@ -306,6 +309,7 @@ struct flex_groups { #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) #ifdef __KERNEL__ # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) +# define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) @@ -975,9 +979,9 @@ struct ext4_super_block { /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ __le32 s_first_data_block; /* First Data Block */ __le32 s_log_block_size; /* Block size */ - __le32 s_obso_log_frag_size; /* Obsoleted fragment size */ + __le32 s_log_cluster_size; /* Allocation cluster size */ /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ - __le32 s_obso_frags_per_group; /* Obsoleted fragments per group */ + __le32 s_clusters_per_group; /* # Clusters per group */ __le32 s_inodes_per_group; /* # Inodes per group */ __le32 s_mtime; /* Mount time */ /*30*/ __le32 s_wtime; /* Write time */ @@ -1073,7 +1077,10 @@ struct ext4_super_block { __u8 s_last_error_func[32]; /* function where the error happened */ #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) __u8 s_mount_opts[64]; - __le32 s_reserved[112]; /* Padding to the end of the block */ + __le32 s_usr_quota_inum; /* inode for tracking user quota */ + __le32 s_grp_quota_inum; /* inode for tracking group quota */ + __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ + __le32 s_reserved[109]; /* Padding to the end of the block */ }; #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) @@ -1093,6 +1100,7 @@ struct ext4_sb_info { unsigned long s_desc_size; /* Size of a group descriptor in bytes */ unsigned long s_inodes_per_block;/* Number of inodes per block */ unsigned long s_blocks_per_group;/* Number of blocks in a group */ + unsigned long s_clusters_per_group; /* Number of clusters in a group */ unsigned long s_inodes_per_group;/* Number of inodes in a group */ unsigned long s_itb_per_group; /* Number of inode table blocks per group */ unsigned long s_gdb_count; /* Number of group descriptor blocks */ @@ -1101,6 +1109,8 @@ struct ext4_sb_info { ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ unsigned long s_overhead_last; /* Last calculated overhead */ unsigned long s_blocks_last; /* Last seen block count */ + unsigned int s_cluster_ratio; /* Number of blocks per cluster */ + unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ struct buffer_head * s_sbh; /* Buffer containing the super block */ struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ @@ -1367,6 +1377,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 +#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 5dcd0dacc5910f64076719517728006502a9170e..823e7d9deee273f7d66a31845dc6658c58a880f2 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1953,7 +1953,7 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, res = MS_RDONLY; } if (read_only) - return res; + goto done; if (!(sbi->s_mount_state & EXT4_VALID_FS)) ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " "running e2fsck is recommended"); @@ -1984,6 +1984,7 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); ext4_commit_super(sb, 1); +done: if (test_opt(sb, DEBUG)) printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", @@ -3105,10 +3106,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) char *cp; const char *descr; int ret = -ENOMEM; - int blocksize; + int blocksize, clustersize; unsigned int db_count; unsigned int i; - int needs_recovery, has_huge_files; + int needs_recovery, has_huge_files, has_bigalloc; __u64 blocks_count; int err; unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; @@ -3412,12 +3413,53 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sb->s_dirt = 1; } - if (sbi->s_blocks_per_group > blocksize * 8) { - ext4_msg(sb, KERN_ERR, - "#blocks per group too big: %lu", - sbi->s_blocks_per_group); - goto failed_mount; + /* Handle clustersize */ + clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); + has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, + EXT4_FEATURE_RO_COMPAT_BIGALLOC); + if (has_bigalloc) { + if (clustersize < blocksize) { + ext4_msg(sb, KERN_ERR, + "cluster size (%d) smaller than " + "block size (%d)", clustersize, blocksize); + goto failed_mount; + } + sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - + le32_to_cpu(es->s_log_block_size); + sbi->s_clusters_per_group = + le32_to_cpu(es->s_clusters_per_group); + if (sbi->s_clusters_per_group > blocksize * 8) { + ext4_msg(sb, KERN_ERR, + "#clusters per group too big: %lu", + sbi->s_clusters_per_group); + goto failed_mount; + } + if (sbi->s_blocks_per_group != + (sbi->s_clusters_per_group * (clustersize / blocksize))) { + ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " + "clusters per group (%lu) inconsistent", + sbi->s_blocks_per_group, + sbi->s_clusters_per_group); + goto failed_mount; + } + } else { + if (clustersize != blocksize) { + ext4_warning(sb, "fragment/cluster size (%d) != " + "block size (%d)", clustersize, + blocksize); + clustersize = blocksize; + } + if (sbi->s_blocks_per_group > blocksize * 8) { + ext4_msg(sb, KERN_ERR, + "#blocks per group too big: %lu", + sbi->s_blocks_per_group); + goto failed_mount; + } + sbi->s_clusters_per_group = sbi->s_blocks_per_group; + sbi->s_cluster_bits = 0; } + sbi->s_cluster_ratio = clustersize / blocksize; + if (sbi->s_inodes_per_group > blocksize * 8) { ext4_msg(sb, KERN_ERR, "#inodes per group too big: %lu",