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ext4: factor out ext4_handle_clustersize()

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Factor out ext4_handle_clustersize(). No functional change.

Signed-off-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20220916141527.1012715-5-yanaijie@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jason Yan 2022-09-16 22:15:15 +08:00 committed by Theodore Ts'o
parent 5f6d662d12
commit 4a8557b094
1 changed files with 61 additions and 49 deletions
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110
fs/ext4/super.c
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@ -4337,6 +4337,64 @@ static void ext4_set_def_opts(struct super_block *sb,
set_opt(sb, DELALLOC); set_opt(sb, DELALLOC);
} }
static int ext4_handle_clustersize(struct super_block *sb, int blocksize)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_super_block *es = sbi->s_es;
int clustersize;
/* Handle clustersize */
clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size);
if (ext4_has_feature_bigalloc(sb)) {
if (clustersize < blocksize) {
ext4_msg(sb, KERN_ERR,
"cluster size (%d) smaller than "
"block size (%d)", clustersize, blocksize);
return -EINVAL;
}
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);
return -EINVAL;
}
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);
return -EINVAL;
}
} else {
if (clustersize != blocksize) {
ext4_msg(sb, KERN_ERR,
"fragment/cluster size (%d) != "
"block size (%d)", clustersize, blocksize);
return -EINVAL;
}
if (sbi->s_blocks_per_group > blocksize * 8) {
ext4_msg(sb, KERN_ERR,
"#blocks per group too big: %lu",
sbi->s_blocks_per_group);
return -EINVAL;
}
sbi->s_clusters_per_group = sbi->s_blocks_per_group;
sbi->s_cluster_bits = 0;
}
sbi->s_cluster_ratio = clustersize / blocksize;
/* Do we have standard group size of clustersize * 8 blocks ? */
if (sbi->s_blocks_per_group == clustersize << 3)
set_opt2(sb, STD_GROUP_SIZE);
return 0;
}
static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
{ {
struct buffer_head *bh, **group_desc; struct buffer_head *bh, **group_desc;
@ -4348,7 +4406,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
unsigned long offset = 0; unsigned long offset = 0;
struct inode *root; struct inode *root;
int ret = -ENOMEM; int ret = -ENOMEM;
int blocksize, clustersize; int blocksize;
unsigned int db_count; unsigned int db_count;
unsigned int i; unsigned int i;
int needs_recovery, has_huge_files; int needs_recovery, has_huge_files;
@ -4821,54 +4879,8 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
} }
} }
/* Handle clustersize */ if (ext4_handle_clustersize(sb, blocksize))
clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); goto failed_mount;
if (ext4_has_feature_bigalloc(sb)) {
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_msg(sb, KERN_ERR,
"fragment/cluster size (%d) != "
"block size (%d)", clustersize, blocksize);
goto failed_mount;
}
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;
/* Do we have standard group size of clustersize * 8 blocks ? */
if (sbi->s_blocks_per_group == clustersize << 3)
set_opt2(sb, STD_GROUP_SIZE);
/* /*
* Test whether we have more sectors than will fit in sector_t, * Test whether we have more sectors than will fit in sector_t,