Factor out ext4_handle_csum(). No functional change.
Signed-off-by: Jason Yan <yanaijie@xxxxxxxxxx>
---
fs/ext4/super.c | 83 +++++++++++++++++++++++++++----------------------
1 file changed, 46 insertions(+), 37 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9ee27472b802..96cf23787bba 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4563,6 +4563,50 @@ static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *e
return 0;
}
+static int ext4_handle_csum(struct super_block *sb, struct ext4_super_block *es)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+ /* Warn if metadata_csum and gdt_csum are both set. */
+ if (ext4_has_feature_metadata_csum(sb) &&
+ ext4_has_feature_gdt_csum(sb))
+ ext4_warning(sb, "metadata_csum and uninit_bg are "
+ "redundant flags; please run fsck.");
+
+ /* Check for a known checksum algorithm */
+ if (!ext4_verify_csum_type(sb, es)) {
+ ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with "
+ "unknown checksum algorithm.");
+ return -EINVAL;
+ }
+ ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE,
+ ext4_orphan_file_block_trigger);
+
+ /* Load the checksum driver */
+ sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
+ if (IS_ERR(sbi->s_chksum_driver)) {
+ int ret = PTR_ERR(sbi->s_chksum_driver);
+ ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver.");
+ sbi->s_chksum_driver = NULL;
+ return ret;
+ }
+
+ /* Check superblock checksum */
+ if (!ext4_superblock_csum_verify(sb, es)) {
+ ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with "
+ "invalid superblock checksum. Run e2fsck?");
+ return -EFSBADCRC;
+ }
+
+ /* Precompute checksum seed for all metadata */
+ if (ext4_has_feature_csum_seed(sb))
+ sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed);
+ else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb))
+ sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,
+ sizeof(es->s_uuid));
+ return 0;
+}
+
static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
{
struct buffer_head *bh, **group_desc;
@@ -4632,44 +4676,9 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);
- /* Warn if metadata_csum and gdt_csum are both set. */
- if (ext4_has_feature_metadata_csum(sb) &&
- ext4_has_feature_gdt_csum(sb))
- ext4_warning(sb, "metadata_csum and uninit_bg are "
- "redundant flags; please run fsck.");
-
- /* Check for a known checksum algorithm */
- if (!ext4_verify_csum_type(sb, es)) {
- ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with "
- "unknown checksum algorithm.");
- goto failed_mount;
- }
- ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE,
- ext4_orphan_file_block_trigger);
-
- /* Load the checksum driver */
- sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
- if (IS_ERR(sbi->s_chksum_driver)) {
- ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver.");
- ret = PTR_ERR(sbi->s_chksum_driver);
- sbi->s_chksum_driver = NULL;
- goto failed_mount;
- }
-
- /* Check superblock checksum */
- if (!ext4_superblock_csum_verify(sb, es)) {
- ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with "
- "invalid superblock checksum. Run e2fsck?");
- ret = -EFSBADCRC;
+ err = ext4_handle_csum(sb, es);
+ if (err)
goto failed_mount;
- }
-
- /* Precompute checksum seed for all metadata */
- if (ext4_has_feature_csum_seed(sb))
- sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed);
- else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb))
- sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,
- sizeof(es->s_uuid));
ext4_set_def_opts(sb, es);
--
2.31.1
