summaryrefslogtreecommitdiffstats
path: root/fs/ext4/resize.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ext4/resize.c')
-rw-r--r--fs/ext4/resize.c71
1 files changed, 63 insertions, 8 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 59fa0be27251..7ea6cbb44121 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -161,6 +161,8 @@ static struct ext4_new_flex_group_data *alloc_flex_gd(unsigned long flexbg_size)
if (flex_gd == NULL)
goto out3;
+ if (flexbg_size >= UINT_MAX / sizeof(struct ext4_new_flex_group_data))
+ goto out2;
flex_gd->count = flexbg_size;
flex_gd->groups = kmalloc(sizeof(struct ext4_new_group_data) *
@@ -796,7 +798,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
ext4_kvfree(o_group_desc);
le16_add_cpu(&es->s_reserved_gdt_blocks, -1);
- err = ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh);
+ err = ext4_handle_dirty_super_now(handle, sb);
if (err)
ext4_std_error(sb, err);
@@ -968,6 +970,8 @@ static void update_backups(struct super_block *sb,
goto exit_err;
}
+ ext4_superblock_csum_set(sb, (struct ext4_super_block *)data);
+
while ((group = ext4_list_backups(sb, &three, &five, &seven)) < last) {
struct buffer_head *bh;
@@ -1067,6 +1071,54 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
return err;
}
+static struct buffer_head *ext4_get_bitmap(struct super_block *sb, __u64 block)
+{
+ struct buffer_head *bh = sb_getblk(sb, block);
+ if (!bh)
+ return NULL;
+
+ if (bitmap_uptodate(bh))
+ return bh;
+
+ lock_buffer(bh);
+ if (bh_submit_read(bh) < 0) {
+ unlock_buffer(bh);
+ brelse(bh);
+ return NULL;
+ }
+ unlock_buffer(bh);
+
+ return bh;
+}
+
+static int ext4_set_bitmap_checksums(struct super_block *sb,
+ ext4_group_t group,
+ struct ext4_group_desc *gdp,
+ struct ext4_new_group_data *group_data)
+{
+ struct buffer_head *bh;
+
+ if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ return 0;
+
+ bh = ext4_get_bitmap(sb, group_data->inode_bitmap);
+ if (!bh)
+ return -EIO;
+ ext4_inode_bitmap_csum_set(sb, group, gdp, bh,
+ EXT4_INODES_PER_GROUP(sb) / 8);
+ brelse(bh);
+
+ bh = ext4_get_bitmap(sb, group_data->block_bitmap);
+ if (!bh)
+ return -EIO;
+ ext4_block_bitmap_csum_set(sb, group, gdp, bh,
+ EXT4_BLOCKS_PER_GROUP(sb) / 8);
+ brelse(bh);
+
+ return 0;
+}
+
/*
* ext4_setup_new_descs() will set up the group descriptor descriptors of a flex bg
*/
@@ -1093,18 +1145,24 @@ static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,
*/
gdb_bh = sbi->s_group_desc[gdb_num];
/* Update group descriptor block for new group */
- gdp = (struct ext4_group_desc *)((char *)gdb_bh->b_data +
+ gdp = (struct ext4_group_desc *)(gdb_bh->b_data +
gdb_off * EXT4_DESC_SIZE(sb));
memset(gdp, 0, EXT4_DESC_SIZE(sb));
ext4_block_bitmap_set(sb, gdp, group_data->block_bitmap);
ext4_inode_bitmap_set(sb, gdp, group_data->inode_bitmap);
+ err = ext4_set_bitmap_checksums(sb, group, gdp, group_data);
+ if (err) {
+ ext4_std_error(sb, err);
+ break;
+ }
+
ext4_inode_table_set(sb, gdp, group_data->inode_table);
ext4_free_group_clusters_set(sb, gdp,
EXT4_B2C(sbi, group_data->free_blocks_count));
ext4_free_inodes_set(sb, gdp, EXT4_INODES_PER_GROUP(sb));
gdp->bg_flags = cpu_to_le16(*bg_flags);
- gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp);
+ ext4_group_desc_csum_set(sb, group, gdp);
err = ext4_handle_dirty_metadata(handle, NULL, gdb_bh);
if (unlikely(err)) {
@@ -1343,17 +1401,14 @@ static int ext4_setup_next_flex_gd(struct super_block *sb,
(1 + ext4_bg_num_gdb(sb, group + i) +
le16_to_cpu(es->s_reserved_gdt_blocks)) : 0;
group_data[i].free_blocks_count = blocks_per_group - overhead;
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+ if (ext4_has_group_desc_csum(sb))
flex_gd->bg_flags[i] = EXT4_BG_BLOCK_UNINIT |
EXT4_BG_INODE_UNINIT;
else
flex_gd->bg_flags[i] = EXT4_BG_INODE_ZEROED;
}
- if (last_group == n_group &&
- EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+ if (last_group == n_group && ext4_has_group_desc_csum(sb))
/* We need to initialize block bitmap of last group. */
flex_gd->bg_flags[i - 1] &= ~EXT4_BG_BLOCK_UNINIT;