Ext4: add ext4_group_t, and change all group variables to this type. From: Avantika Mathur In many places variables for block group are of type int, which limits the maximum number of block groups to 2^31. Each block group can have up to 2^15 blocks, with a 4K block size, and the max filesystem size is limited to 2^31 * (2^15 * 2^12) = 2^58 -- or 256 PB This patch introduces a new type ext4_group_t, of type unsigned long, to represent block group numbers in ext4. All occurrences of block group variables are converted to type ext4_group_t. Signed-off-by: Avantika Mathur --- fs/ext4/balloc.c | 71 +++++++++++++++++++++------------------------ fs/ext4/group.h | 8 +++-- fs/ext4/ialloc.c | 46 +++++++++++++++-------------- fs/ext4/inode.c | 5 +-- fs/ext4/resize.c | 12 +++---- fs/ext4/super.c | 20 +++++------- include/linux/ext4_fs.h | 11 +++--- include/linux/ext4_fs_i.h | 5 ++- include/linux/ext4_fs_sb.h | 2 - 9 files changed, 92 insertions(+), 88 deletions(-) Index: linux-2.6.24-rc1/fs/ext4/balloc.c =================================================================== --- linux-2.6.24-rc1.orig/fs/ext4/balloc.c 2007-10-23 20:50:57.000000000 -0700 +++ linux-2.6.24-rc1/fs/ext4/balloc.c 2007-10-29 16:17:49.000000000 -0700 @@ -29,7 +29,7 @@ * Calculate the block group number and offset, given a block number */ void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr, - unsigned long *blockgrpp, ext4_grpblk_t *offsetp) + ext4_group_t *blockgrpp, ext4_grpblk_t *offsetp) { struct ext4_super_block *es = EXT4_SB(sb)->s_es; ext4_grpblk_t offset; @@ -46,7 +46,7 @@ /* Initializes an uninitialized block bitmap if given, and returns the * number of blocks free in the group. */ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh, - int block_group, struct ext4_group_desc *gdp) + ext4_group_t block_group, struct ext4_group_desc *gdp) { unsigned long start; int bit, bit_max; @@ -60,7 +60,7 @@ * essentially implementing a per-group read-only flag. */ if (!ext4_group_desc_csum_verify(sbi, block_group, gdp)) { ext4_error(sb, __FUNCTION__, - "Checksum bad for group %u\n", block_group); + "Checksum bad for group %lu\n", block_group); gdp->bg_free_blocks_count = 0; gdp->bg_free_inodes_count = 0; gdp->bg_itable_unused = 0; @@ -153,7 +153,7 @@ * group descriptor */ struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, - unsigned int block_group, + ext4_group_t block_group, struct buffer_head ** bh) { unsigned long group_desc; @@ -164,7 +164,7 @@ if (block_group >= sbi->s_groups_count) { ext4_error (sb, "ext4_get_group_desc", "block_group >= groups_count - " - "block_group = %d, groups_count = %lu", + "block_group = %lu, groups_count = %lu", block_group, sbi->s_groups_count); return NULL; @@ -176,7 +176,7 @@ if (!sbi->s_group_desc[group_desc]) { ext4_error (sb, "ext4_get_group_desc", "Group descriptor not loaded - " - "block_group = %d, group_desc = %lu, desc = %lu", + "block_group = %lu, group_desc = %lu, desc = %lu", block_group, group_desc, offset); return NULL; } @@ -209,7 +209,7 @@ * Return buffer_head on success or NULL in case of failure. */ struct buffer_head * -read_block_bitmap(struct super_block *sb, unsigned int block_group) +read_block_bitmap(struct super_block *sb, ext4_group_t block_group) { int i; struct ext4_group_desc * desc; @@ -237,7 +237,7 @@ if (!bh) ext4_error (sb, __FUNCTION__, "Cannot read block bitmap - " - "block_group = %d, block_bitmap = %llu", + "block_group = %lu, block_bitmap = %llu", block_group, bitmap_blk); /* check whether block bitmap block number is set */ @@ -267,7 +267,7 @@ brelse(bh); ext4_error(sb, __FUNCTION__, "Invalid block bitmap - " - "block_group = %d, block = %llu", + "block_group = %lu, block = %llu", block_group, bitmap_blk); return NULL; @@ -361,7 +361,7 @@ */ static int goal_in_my_reservation(struct ext4_reserve_window *rsv, ext4_grpblk_t grp_goal, - unsigned int group, struct super_block * sb) + ext4_group_t group, struct super_block *sb) { ext4_fsblk_t group_first_block, group_last_block; @@ -581,7 +581,7 @@ { struct buffer_head *bitmap_bh = NULL; struct buffer_head *gd_bh; - unsigned long block_group; + ext4_group_t block_group; ext4_grpblk_t bit; unsigned long i; unsigned long overflow; @@ -961,9 +961,10 @@ * ext4_journal_release_buffer(), else we'll run out of credits. */ static ext4_grpblk_t -ext4_try_to_allocate(struct super_block *sb, handle_t *handle, int group, - struct buffer_head *bitmap_bh, ext4_grpblk_t grp_goal, - unsigned long *count, struct ext4_reserve_window *my_rsv) +ext4_try_to_allocate(struct super_block *sb, handle_t *handle, + ext4_group_t group, struct buffer_head *bitmap_bh, + ext4_grpblk_t grp_goal, unsigned long *count, + struct ext4_reserve_window *my_rsv) { ext4_fsblk_t group_first_block; ext4_grpblk_t start, end; @@ -1197,7 +1198,7 @@ */ static int alloc_new_reservation(struct ext4_reserve_window_node *my_rsv, ext4_grpblk_t grp_goal, struct super_block *sb, - unsigned int group, struct buffer_head *bitmap_bh) + ext4_group_t group, struct buffer_head *bitmap_bh) { struct ext4_reserve_window_node *search_head; ext4_fsblk_t group_first_block, group_end_block, start_block; @@ -1395,7 +1396,7 @@ */ static ext4_grpblk_t ext4_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle, - unsigned int group, struct buffer_head *bitmap_bh, + ext4_group_t group, struct buffer_head *bitmap_bh, ext4_grpblk_t grp_goal, struct ext4_reserve_window_node * my_rsv, unsigned long *count, int *errp) @@ -1569,12 +1570,12 @@ { struct buffer_head *bitmap_bh = NULL; struct buffer_head *gdp_bh; - unsigned long group_no; - int goal_group; + ext4_group_t group_no; + ext4_group_t goal_group; ext4_grpblk_t grp_target_blk; /* blockgroup relative goal block */ ext4_grpblk_t grp_alloc_blk; /* blockgroup-relative allocated block*/ ext4_fsblk_t ret_block; /* filesyetem-wide allocated block */ - int bgi; /* blockgroup iteration index */ + ext4_group_t bgi; /* blockgroup iteration index */ int fatal = 0, err; int performed_allocation = 0; ext4_grpblk_t free_blocks; /* number of free blocks in a group */ @@ -1585,10 +1586,7 @@ struct ext4_reserve_window_node *my_rsv = NULL; struct ext4_block_alloc_info *block_i; unsigned short windowsz = 0; -#ifdef EXT4FS_DEBUG - static int goal_hits, goal_attempts; -#endif - unsigned long ngroups; + ext4_group_t ngroups; unsigned long num = *count; *errp = -ENOSPC; @@ -1784,9 +1782,6 @@ * list of some description. We don't know in advance whether * the caller wants to use it as metadata or data. */ - ext4_debug("allocating block %lu. Goal hits %d of %d.\n", - ret_block, goal_hits, goal_attempts); - spin_lock(sb_bgl_lock(sbi, group_no)); if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); @@ -1845,8 +1840,8 @@ { ext4_fsblk_t desc_count; struct ext4_group_desc *gdp; - int i; - unsigned long ngroups = EXT4_SB(sb)->s_groups_count; + ext4_group_t i; + ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; #ifdef EXT4FS_DEBUG struct ext4_super_block *es; ext4_fsblk_t bitmap_count; @@ -1870,7 +1865,7 @@ continue; x = ext4_count_free(bitmap_bh, sb->s_blocksize); - printk("group %d: stored = %d, counted = %lu\n", + printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n", i, le16_to_cpu(gdp->bg_free_blocks_count), x); bitmap_count += x; } @@ -1894,7 +1889,7 @@ #endif } -static inline int test_root(int a, int b) +static inline int test_root(ext4_group_t a, int b) { int num = b; @@ -1903,7 +1898,7 @@ return num == a; } -static int ext4_group_sparse(int group) +static int ext4_group_sparse(ext4_group_t group) { if (group <= 1) return 1; @@ -1921,7 +1916,7 @@ * Return the number of blocks used by the superblock (primary or backup) * in this group. Currently this will be only 0 or 1. */ -int ext4_bg_has_super(struct super_block *sb, int group) +int ext4_bg_has_super(struct super_block *sb, ext4_group_t group) { if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER) && @@ -1930,18 +1925,20 @@ return 1; } -static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb, int group) +static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb, + ext4_group_t group) { unsigned long metagroup = group / EXT4_DESC_PER_BLOCK(sb); - unsigned long first = metagroup * EXT4_DESC_PER_BLOCK(sb); - unsigned long last = first + EXT4_DESC_PER_BLOCK(sb) - 1; + ext4_group_t first = metagroup * EXT4_DESC_PER_BLOCK(sb); + ext4_group_t last = first + EXT4_DESC_PER_BLOCK(sb) - 1; if (group == first || group == first + 1 || group == last) return 1; return 0; } -static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb, int group) +static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb, + ext4_group_t group) { if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER) && @@ -1959,7 +1956,7 @@ * (primary or backup) in this group. In the future there may be a * different number of descriptor blocks in each group. */ -unsigned long ext4_bg_num_gdb(struct super_block *sb, int group) +unsigned long ext4_bg_num_gdb(struct super_block *sb, ext4_group_t group) { unsigned long first_meta_bg = le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg); Index: linux-2.6.24-rc1/fs/ext4/group.h =================================================================== --- linux-2.6.24-rc1.orig/fs/ext4/group.h 2007-10-23 20:50:57.000000000 -0700 +++ linux-2.6.24-rc1/fs/ext4/group.h 2007-10-29 11:44:53.000000000 -0700 @@ -14,14 +14,16 @@ extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group, struct ext4_group_desc *gdp); struct buffer_head *read_block_bitmap(struct super_block *sb, - unsigned int block_group); + ext4_group_t block_group); extern unsigned ext4_init_block_bitmap(struct super_block *sb, - struct buffer_head *bh, int group, + struct buffer_head *bh, + ext4_group_t group, struct ext4_group_desc *desc); #define ext4_free_blocks_after_init(sb, group, desc) \ ext4_init_block_bitmap(sb, NULL, group, desc) extern unsigned ext4_init_inode_bitmap(struct super_block *sb, - struct buffer_head *bh, int group, + struct buffer_head *bh, + ext4_group_t group, struct ext4_group_desc *desc); extern void mark_bitmap_end(int start_bit, int end_bit, char *bitmap); #endif /* _LINUX_EXT4_GROUP_H */ Index: linux-2.6.24-rc1/fs/ext4/ialloc.c =================================================================== --- linux-2.6.24-rc1.orig/fs/ext4/ialloc.c 2007-10-23 20:50:57.000000000 -0700 +++ linux-2.6.24-rc1/fs/ext4/ialloc.c 2007-10-29 16:19:21.000000000 -0700 @@ -64,8 +64,8 @@ } /* Initializes an uninitialized inode bitmap */ -unsigned ext4_init_inode_bitmap(struct super_block *sb, - struct buffer_head *bh, int block_group, +unsigned ext4_init_inode_bitmap(struct super_block *sb, struct buffer_head *bh, + ext4_group_t block_group, struct ext4_group_desc *gdp) { struct ext4_sb_info *sbi = EXT4_SB(sb); @@ -75,7 +75,7 @@ /* If checksum is bad mark all blocks and inodes use to prevent * allocation, essentially implementing a per-group read-only flag. */ if (!ext4_group_desc_csum_verify(sbi, block_group, gdp)) { - ext4_error(sb, __FUNCTION__, "Checksum bad for group %u\n", + ext4_error(sb, __FUNCTION__, "Checksum bad for group %lu\n", block_group); gdp->bg_free_blocks_count = 0; gdp->bg_free_inodes_count = 0; @@ -98,7 +98,7 @@ * Return buffer_head of bitmap on success or NULL. */ static struct buffer_head * -read_inode_bitmap(struct super_block * sb, unsigned long block_group) +read_inode_bitmap(struct super_block *sb, ext4_group_t block_group) { struct ext4_group_desc *desc; struct buffer_head *bh = NULL; @@ -152,7 +152,7 @@ unsigned long ino; struct buffer_head *bitmap_bh = NULL; struct buffer_head *bh2; - unsigned long block_group; + ext4_group_t block_group; unsigned long bit; struct ext4_group_desc * gdp; struct ext4_super_block * es; @@ -260,12 +260,12 @@ * For other inodes, search forward from the parent directory\'s block * group to find a free inode. */ -static int find_group_dir(struct super_block *sb, struct inode *parent) +static ext4_group_t find_group_dir(struct super_block *sb, struct inode *parent) { - int ngroups = EXT4_SB(sb)->s_groups_count; + ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; unsigned int freei, avefreei; struct ext4_group_desc *desc, *best_desc = NULL; - int group, best_group = -1; + ext4_group_t group, best_group = -1; freei = percpu_counter_read_positive(&EXT4_SB(sb)->s_freeinodes_counter); avefreei = freei / ngroups; @@ -314,12 +314,13 @@ #define INODE_COST 64 #define BLOCK_COST 256 -static int find_group_orlov(struct super_block *sb, struct inode *parent) +static ext4_group_t find_group_orlov(struct super_block *sb, + struct inode *parent) { - int parent_group = EXT4_I(parent)->i_block_group; + ext4_group_t parent_group = EXT4_I(parent)->i_block_group; struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_super_block *es = sbi->s_es; - int ngroups = sbi->s_groups_count; + ext4_group_t ngroups = sbi->s_groups_count; int inodes_per_group = EXT4_INODES_PER_GROUP(sb); unsigned int freei, avefreei; ext4_fsblk_t freeb, avefreeb; @@ -327,7 +328,7 @@ unsigned int ndirs; int max_debt, max_dirs, min_inodes; ext4_grpblk_t min_blocks; - int group = -1, i; + ext4_group_t group = -1, i; struct ext4_group_desc *desc; freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter); @@ -340,7 +341,7 @@ if ((parent == sb->s_root->d_inode) || (EXT4_I(parent)->i_flags & EXT4_TOPDIR_FL)) { int best_ndir = inodes_per_group; - int best_group = -1; + ext4_group_t best_group = -1; get_random_bytes(&group, sizeof(group)); parent_group = (unsigned)group % ngroups; @@ -415,12 +416,13 @@ return -1; } -static int find_group_other(struct super_block *sb, struct inode *parent) +static ext4_group_t find_group_other(struct super_block *sb, + struct inode *parent) { - int parent_group = EXT4_I(parent)->i_block_group; - int ngroups = EXT4_SB(sb)->s_groups_count; + ext4_group_t parent_group = EXT4_I(parent)->i_block_group; + ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; struct ext4_group_desc *desc; - int group, i; + ext4_group_t group, i; /* * Try to place the inode in its parent directory @@ -487,7 +489,7 @@ struct super_block *sb; struct buffer_head *bitmap_bh = NULL; struct buffer_head *bh2; - int group; + ext4_group_t group; unsigned long ino = 0; struct inode * inode; struct ext4_group_desc * gdp = NULL; @@ -583,7 +585,7 @@ ino > EXT4_INODES_PER_GROUP(sb)) { ext4_error(sb, __FUNCTION__, "reserved inode or inode > inodes count - " - "block_group = %d, inode=%lu", group, + "block_group = %lu, inode=%lu", group, ino + group * EXT4_INODES_PER_GROUP(sb)); err = -EIO; goto fail; @@ -777,7 +779,7 @@ struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino) { unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count); - unsigned long block_group; + ext4_group_t block_group; int bit; struct buffer_head *bitmap_bh = NULL; struct inode *inode = NULL; @@ -833,7 +835,7 @@ { unsigned long desc_count; struct ext4_group_desc *gdp; - int i; + ext4_group_t i; #ifdef EXT4FS_DEBUG struct ext4_super_block *es; unsigned long bitmap_count, x; @@ -879,7 +881,7 @@ unsigned long ext4_count_dirs (struct super_block * sb) { unsigned long count = 0; - int i; + ext4_group_t i; for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) { struct ext4_group_desc *gdp = ext4_get_group_desc (sb, i, NULL); Index: linux-2.6.24-rc1/fs/ext4/inode.c =================================================================== --- linux-2.6.24-rc1.orig/fs/ext4/inode.c 2007-10-29 11:39:48.000000000 -0700 +++ linux-2.6.24-rc1/fs/ext4/inode.c 2007-10-29 16:17:56.000000000 -0700 @@ -2464,7 +2464,8 @@ static ext4_fsblk_t ext4_get_inode_block(struct super_block *sb, unsigned long ino, struct ext4_iloc *iloc) { - unsigned long desc, group_desc, block_group; + unsigned long desc, group_desc; + ext4_group_t block_group; unsigned long offset; ext4_fsblk_t block; struct buffer_head *bh; @@ -2551,7 +2552,7 @@ struct ext4_group_desc *desc; int inodes_per_buffer; int inode_offset, i; - int block_group; + ext4_group_t block_group; int start; block_group = (inode->i_ino - 1) / Index: linux-2.6.24-rc1/fs/ext4/resize.c =================================================================== --- linux-2.6.24-rc1.orig/fs/ext4/resize.c 2007-10-23 20:50:57.000000000 -0700 +++ linux-2.6.24-rc1/fs/ext4/resize.c 2007-10-29 11:45:49.000000000 -0700 @@ -28,7 +28,7 @@ struct ext4_super_block *es = sbi->s_es; ext4_fsblk_t start = ext4_blocks_count(es); ext4_fsblk_t end = start + input->blocks_count; - unsigned group = input->group; + ext4_group_t group = input->group; ext4_fsblk_t itend = input->inode_table + sbi->s_itb_per_group; unsigned overhead = ext4_bg_has_super(sb, group) ? (1 + ext4_bg_num_gdb(sb, group) + @@ -357,7 +357,7 @@ struct buffer_head *primary) { const ext4_fsblk_t blk = primary->b_blocknr; - const unsigned long end = EXT4_SB(sb)->s_groups_count; + const ext4_group_t end = EXT4_SB(sb)->s_groups_count; unsigned three = 1; unsigned five = 5; unsigned seven = 7; @@ -656,12 +656,12 @@ int blk_off, char *data, int size) { struct ext4_sb_info *sbi = EXT4_SB(sb); - const unsigned long last = sbi->s_groups_count; + const ext4_group_t last = sbi->s_groups_count; const int bpg = EXT4_BLOCKS_PER_GROUP(sb); unsigned three = 1; unsigned five = 5; unsigned seven = 7; - unsigned group; + ext4_group_t group; int rest = sb->s_blocksize - size; handle_t *handle; int err = 0, err2; @@ -716,7 +716,7 @@ exit_err: if (err) { ext4_warning(sb, __FUNCTION__, - "can't update backup for group %d (err %d), " + "can't update backup for group %lu (err %d), " "forcing fsck on next reboot", group, err); sbi->s_mount_state &= ~EXT4_VALID_FS; sbi->s_es->s_state &= cpu_to_le16(~EXT4_VALID_FS); @@ -952,7 +952,7 @@ ext4_fsblk_t n_blocks_count) { ext4_fsblk_t o_blocks_count; - unsigned long o_groups_count; + ext4_group_t o_groups_count; ext4_grpblk_t last; ext4_grpblk_t add; struct buffer_head * bh; Index: linux-2.6.24-rc1/fs/ext4/super.c =================================================================== --- linux-2.6.24-rc1.orig/fs/ext4/super.c 2007-10-29 11:39:48.000000000 -0700 +++ linux-2.6.24-rc1/fs/ext4/super.c 2007-10-29 16:17:57.000000000 -0700 @@ -1364,7 +1364,7 @@ struct ext4_group_desc * gdp = NULL; int desc_block = 0; int flexbg_flag = 0; - int i; + ext4_group_t i; if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) flexbg_flag = 1; @@ -1386,7 +1386,7 @@ if (block_bitmap < first_block || block_bitmap > last_block) { ext4_error (sb, "ext4_check_descriptors", - "Block bitmap for group %d" + "Block bitmap for group %lu" " not in group (block %llu)!", i, block_bitmap); return 0; @@ -1395,7 +1395,7 @@ if (inode_bitmap < first_block || inode_bitmap > last_block) { ext4_error (sb, "ext4_check_descriptors", - "Inode bitmap for group %d" + "Inode bitmap for group %lu" " not in group (block %llu)!", i, inode_bitmap); return 0; @@ -1405,17 +1405,16 @@ inode_table + sbi->s_itb_per_group - 1 > last_block) { ext4_error (sb, "ext4_check_descriptors", - "Inode table for group %d" + "Inode table for group %lu" " not in group (block %llu)!", i, inode_table); return 0; } if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { ext4_error(sb, __FUNCTION__, - "Checksum for group %d failed (%u!=%u)\n", i, - le16_to_cpu(ext4_group_desc_csum(sbi, i, - gdp)), - le16_to_cpu(gdp->bg_checksum)); + "Checksum for group %lu failed (%u!=%u)\n", + i, le16_to_cpu(ext4_group_desc_csum(sbi, i, + gdp)), le16_to_cpu(gdp->bg_checksum)); return 0; } if (!flexbg_flag) @@ -1429,7 +1428,6 @@ return 1; } - /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at * the superblock) which were deleted from all directories, but held open by * a process at the time of a crash. We walk the list and try to delete these @@ -1570,7 +1568,7 @@ ext4_fsblk_t logical_sb_block, int nr) { struct ext4_sb_info *sbi = EXT4_SB(sb); - unsigned long bg, first_meta_bg; + ext4_group_t bg, first_meta_bg; int has_super = 0; first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); @@ -2678,7 +2676,7 @@ if (test_opt(sb, MINIX_DF)) { sbi->s_overhead_last = 0; } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { - unsigned long ngroups = sbi->s_groups_count, i; + ext4_group_t ngroups = sbi->s_groups_count, i; ext4_fsblk_t overhead = 0; smp_rmb(); Index: linux-2.6.24-rc1/include/linux/ext4_fs.h =================================================================== --- linux-2.6.24-rc1.orig/include/linux/ext4_fs.h 2007-10-29 11:39:48.000000000 -0700 +++ linux-2.6.24-rc1/include/linux/ext4_fs.h 2007-10-29 16:17:57.000000000 -0700 @@ -830,7 +830,7 @@ { struct buffer_head *bh; unsigned long offset; - unsigned long block_group; + ext4_group_t block_group; }; static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) @@ -855,7 +855,7 @@ /* calculate the first block number of the group */ static inline ext4_fsblk_t -ext4_group_first_block_no(struct super_block *sb, unsigned long group_no) +ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) { return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); @@ -886,8 +886,9 @@ ext4_fsblk_t blocknr); extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, ext4_fsblk_t blocknr); -extern int ext4_bg_has_super(struct super_block *sb, int group); -extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group); +extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); +extern unsigned long ext4_bg_num_gdb(struct super_block *sb, + ext4_group_t group); extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode, ext4_fsblk_t goal, int *errp); extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode, @@ -900,7 +901,7 @@ extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *); extern void ext4_check_blocks_bitmap (struct super_block *); extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, - unsigned int block_group, + ext4_group_t block_group, struct buffer_head ** bh); extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); extern void ext4_init_block_alloc_info(struct inode *); Index: linux-2.6.24-rc1/include/linux/ext4_fs_i.h =================================================================== --- linux-2.6.24-rc1.orig/include/linux/ext4_fs_i.h 2007-10-29 11:39:48.000000000 -0700 +++ linux-2.6.24-rc1/include/linux/ext4_fs_i.h 2007-10-29 16:17:54.000000000 -0700 @@ -30,6 +30,9 @@ /* data type for file logical block number */ typedef __u32 ext4_lblk_t; +/* data type for block group number */ +typedef unsigned long ext4_group_t; + struct ext4_reserve_window { ext4_fsblk_t _rsv_start; /* First byte reserved */ ext4_fsblk_t _rsv_end; /* Last byte reserved or 0 */ @@ -92,7 +95,7 @@ * place a file's data blocks near its inode block, and new inodes * near to their parent directory's inode. */ - __u32 i_block_group; + ext4_group_t i_block_group; __u32 i_state; /* Dynamic state flags for ext4 */ /* block reservation info */ Index: linux-2.6.24-rc1/include/linux/ext4_fs_sb.h =================================================================== --- linux-2.6.24-rc1.orig/include/linux/ext4_fs_sb.h 2007-10-23 20:50:57.000000000 -0700 +++ linux-2.6.24-rc1/include/linux/ext4_fs_sb.h 2007-10-29 16:17:31.000000000 -0700 @@ -35,7 +35,7 @@ unsigned long s_itb_per_group; /* Number of inode table blocks per group */ unsigned long s_gdb_count; /* Number of group descriptor blocks */ unsigned long s_desc_per_block; /* Number of group descriptors per block */ - unsigned long s_groups_count; /* Number of groups in the fs */ + ext4_group_t s_groups_count; /* Number of groups in the fs */ unsigned long s_overhead_last; /* Last calculated overhead */ unsigned long s_blocks_last; /* Last seen block count */ struct buffer_head * s_sbh; /* Buffer containing the super block */