summaryrefslogtreecommitdiff
path: root/fs/ext4/resize.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ext4/resize.c')
-rw-r--r--fs/ext4/resize.c94
1 files changed, 37 insertions, 57 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 0361c20910de..4fe061edefdd 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -10,8 +10,6 @@
*/
-#define EXT4FS_DEBUG
-
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
@@ -57,7 +55,7 @@ int ext4_resize_begin(struct super_block *sb)
* If the reserved GDT blocks is non-zero, the resize_inode feature
* should always be set.
*/
- if (EXT4_SB(sb)->s_es->s_reserved_gdt_blocks &&
+ if (sbi->s_es->s_reserved_gdt_blocks &&
!ext4_has_feature_resize_inode(sb)) {
ext4_error(sb, "resize_inode disabled but reserved GDT blocks non-zero");
return -EFSCORRUPTED;
@@ -69,9 +67,9 @@ int ext4_resize_begin(struct super_block *sb)
* bad time to do it anyways.
*/
if (EXT4_B2C(sbi, sbi->s_sbh->b_blocknr) !=
- le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) {
+ le32_to_cpu(sbi->s_es->s_first_data_block)) {
ext4_warning(sb, "won't resize using backup superblock at %llu",
- (unsigned long long)EXT4_SB(sb)->s_sbh->b_blocknr);
+ (unsigned long long)sbi->s_sbh->b_blocknr);
return -EPERM;
}
@@ -79,7 +77,7 @@ int ext4_resize_begin(struct super_block *sb)
* We are not allowed to do online-resizing on a filesystem mounted
* with error, because it can destroy the filesystem easily.
*/
- if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
+ if (sbi->s_mount_state & EXT4_ERROR_FS) {
ext4_warning(sb, "There are errors in the filesystem, "
"so online resizing is not allowed");
return -EPERM;
@@ -91,7 +89,7 @@ int ext4_resize_begin(struct super_block *sb)
}
if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING,
- &EXT4_SB(sb)->s_ext4_flags))
+ &sbi->s_ext4_flags))
ret = -EBUSY;
return ret;
@@ -106,18 +104,6 @@ int ext4_resize_end(struct super_block *sb, bool update_backups)
return 0;
}
-static ext4_group_t ext4_meta_bg_first_group(struct super_block *sb,
- ext4_group_t group) {
- return (group >> EXT4_DESC_PER_BLOCK_BITS(sb)) <<
- EXT4_DESC_PER_BLOCK_BITS(sb);
-}
-
-static ext4_fsblk_t ext4_meta_bg_first_block_no(struct super_block *sb,
- ext4_group_t group) {
- group = ext4_meta_bg_first_group(sb, group);
- return ext4_group_first_block_no(sb, group);
-}
-
static ext4_grpblk_t ext4_group_overhead_blocks(struct super_block *sb,
ext4_group_t group) {
ext4_grpblk_t overhead;
@@ -154,8 +140,9 @@ static int verify_group_input(struct super_block *sb,
overhead = ext4_group_overhead_blocks(sb, group);
metaend = start + overhead;
- input->free_clusters_count = free_blocks_count =
- input->blocks_count - 2 - overhead - sbi->s_itb_per_group;
+ free_blocks_count = input->blocks_count - 2 - overhead -
+ sbi->s_itb_per_group;
+ input->free_clusters_count = EXT4_B2C(sbi, free_blocks_count);
if (test_opt(sb, DEBUG))
printk(KERN_DEBUG "EXT4-fs: adding %s group %u: %u blocks "
@@ -460,8 +447,7 @@ static int set_flexbg_block_bitmap(struct super_block *sb, handle_t *handle,
ext4_debug("mark clusters [%llu-%llu] used\n", first_cluster,
last_cluster);
- for (count2 = count; count > 0;
- count -= count2, first_cluster += count2) {
+ for (; count > 0; count -= count2, first_cluster += count2) {
ext4_fsblk_t start;
struct buffer_head *bh;
ext4_group_t group;
@@ -560,13 +546,8 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
if (meta_bg == 0 && !ext4_bg_has_super(sb, group))
goto handle_itb;
- if (meta_bg == 1) {
- ext4_group_t first_group;
- first_group = ext4_meta_bg_first_group(sb, group);
- if (first_group != group + 1 &&
- first_group != group + EXT4_DESC_PER_BLOCK(sb) - 1)
- goto handle_itb;
- }
+ if (meta_bg == 1)
+ goto handle_itb;
block = start + ext4_bg_has_super(sb, group);
/* Copy all of the GDT blocks into the backup in this group */
@@ -614,7 +595,7 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
}
handle_itb:
- /* Initialize group tables of the grop @group */
+ /* Initialize group tables of the group @group */
if (!(bg_flags[i] & EXT4_BG_INODE_ZEROED))
goto handle_bb;
@@ -704,16 +685,14 @@ handle_ib:
block = start;
}
- if (count) {
- err = set_flexbg_block_bitmap(sb, handle,
- flex_gd,
- EXT4_B2C(sbi, start),
- EXT4_B2C(sbi,
- start + count
- - 1));
- if (err)
- goto out;
- }
+ err = set_flexbg_block_bitmap(sb, handle,
+ flex_gd,
+ EXT4_B2C(sbi, start),
+ EXT4_B2C(sbi,
+ start + count
+ - 1));
+ if (err)
+ goto out;
}
out:
@@ -952,7 +931,13 @@ errout:
}
/*
- * add_new_gdb_meta_bg is the sister of add_new_gdb.
+ * If there is no available space in the existing block group descriptors for
+ * the new block group and there are no reserved block group descriptors, then
+ * the meta_bg feature will get enabled, and es->s_first_meta_bg will get set
+ * to the first block group that is managed using meta_bg and s_first_meta_bg
+ * must be a multiple of EXT4_DESC_PER_BLOCK(sb).
+ * This function will be called when first group of meta_bg is added to bring
+ * new group descriptors block of new added meta_bg.
*/
static int add_new_gdb_meta_bg(struct super_block *sb,
handle_t *handle, ext4_group_t group) {
@@ -962,8 +947,8 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
unsigned long gdb_num = group / EXT4_DESC_PER_BLOCK(sb);
int err;
- gdblock = ext4_meta_bg_first_block_no(sb, group) +
- ext4_bg_has_super(sb, group);
+ gdblock = ext4_group_first_block_no(sb, group) +
+ ext4_bg_has_super(sb, group);
gdb_bh = ext4_sb_bread(sb, gdblock, 0);
if (IS_ERR(gdb_bh))
return PTR_ERR(gdb_bh);
@@ -1087,9 +1072,6 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
for (i = 0; i < reserved_gdb; i++) {
int err2;
data = (__le32 *)primary[i]->b_data;
- /* printk("reserving backup %lu[%u] = %lu\n",
- primary[i]->b_blocknr, gdbackups,
- blk + primary[i]->b_blocknr); */
data[gdbackups] = cpu_to_le32(blk + primary[i]->b_blocknr);
err2 = ext4_handle_dirty_metadata(handle, NULL, primary[i]);
if (!err)
@@ -1191,8 +1173,10 @@ static void update_backups(struct super_block *sb, sector_t blk_off, char *data,
ext4_group_first_block_no(sb, group));
BUFFER_TRACE(bh, "get_write_access");
if ((err = ext4_journal_get_write_access(handle, sb, bh,
- EXT4_JTR_NONE)))
+ EXT4_JTR_NONE))) {
+ brelse(bh);
break;
+ }
lock_buffer(bh);
memcpy(bh->b_data, data, size);
if (rest)
@@ -1601,7 +1585,8 @@ exit_journal:
int gdb_num_end = ((group + flex_gd->count - 1) /
EXT4_DESC_PER_BLOCK(sb));
int meta_bg = ext4_has_feature_meta_bg(sb);
- sector_t old_gdb = 0;
+ sector_t padding_blocks = meta_bg ? 0 : sbi->s_sbh->b_blocknr -
+ ext4_group_first_block_no(sb, 0);
update_backups(sb, ext4_group_first_block_no(sb, 0),
(char *)es, sizeof(struct ext4_super_block), 0);
@@ -1610,11 +1595,8 @@ exit_journal:
gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc,
gdb_num);
- if (old_gdb == gdb_bh->b_blocknr)
- continue;
- update_backups(sb, gdb_bh->b_blocknr, gdb_bh->b_data,
- gdb_bh->b_size, meta_bg);
- old_gdb = gdb_bh->b_blocknr;
+ update_backups(sb, gdb_bh->b_blocknr - padding_blocks,
+ gdb_bh->b_data, gdb_bh->b_size, meta_bg);
}
}
exit:
@@ -1980,9 +1962,7 @@ static int ext4_convert_meta_bg(struct super_block *sb, struct inode *inode)
errout:
ret = ext4_journal_stop(handle);
- if (!err)
- err = ret;
- return ret;
+ return err ? err : ret;
invalid_resize_inode:
ext4_error(sb, "corrupted/inconsistent resize inode");
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-09 16:17:02 +0300