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Diffstat (limited to 'fs/ext4/resize.c')
-rw-r--r--fs/ext4/resize.c131
1 files changed, 81 insertions, 50 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index d99387b89ed..bb0e80f03e2 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -42,7 +42,7 @@ int ext4_resize_begin(struct super_block *sb)
void ext4_resize_end(struct super_block *sb)
{
clear_bit_unlock(EXT4_RESIZING, &EXT4_SB(sb)->s_resize_flags);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
}
static ext4_group_t ext4_meta_bg_first_group(struct super_block *sb,
@@ -79,12 +79,20 @@ static int verify_group_input(struct super_block *sb,
ext4_fsblk_t end = start + input->blocks_count;
ext4_group_t group = input->group;
ext4_fsblk_t itend = input->inode_table + sbi->s_itb_per_group;
- unsigned overhead = ext4_group_overhead_blocks(sb, group);
- ext4_fsblk_t metaend = start + overhead;
+ unsigned overhead;
+ ext4_fsblk_t metaend;
struct buffer_head *bh = NULL;
ext4_grpblk_t free_blocks_count, offset;
int err = -EINVAL;
+ if (group != sbi->s_groups_count) {
+ ext4_warning(sb, "Cannot add at group %u (only %u groups)",
+ input->group, sbi->s_groups_count);
+ return -EINVAL;
+ }
+
+ overhead = ext4_group_overhead_blocks(sb, group);
+ metaend = start + overhead;
input->free_blocks_count = free_blocks_count =
input->blocks_count - 2 - overhead - sbi->s_itb_per_group;
@@ -96,10 +104,7 @@ static int verify_group_input(struct super_block *sb,
free_blocks_count, input->reserved_blocks);
ext4_get_group_no_and_offset(sb, start, NULL, &offset);
- if (group != sbi->s_groups_count)
- ext4_warning(sb, "Cannot add at group %u (only %u groups)",
- input->group, sbi->s_groups_count);
- else if (offset != 0)
+ if (offset != 0)
ext4_warning(sb, "Last group not full");
else if (input->reserved_blocks > input->blocks_count / 5)
ext4_warning(sb, "Reserved blocks too high (%u)",
@@ -238,6 +243,7 @@ static int ext4_alloc_group_tables(struct super_block *sb,
ext4_group_t group;
ext4_group_t last_group;
unsigned overhead;
+ __u16 uninit_mask = (flexbg_size > 1) ? ~EXT4_BG_BLOCK_UNINIT : ~0;
BUG_ON(flex_gd->count == 0 || group_data == NULL);
@@ -261,7 +267,7 @@ next_group:
src_group++;
for (; src_group <= last_group; src_group++) {
overhead = ext4_group_overhead_blocks(sb, src_group);
- if (overhead != 0)
+ if (overhead == 0)
last_blk += group_data[src_group - group].blocks_count;
else
break;
@@ -272,11 +278,10 @@ next_group:
if (start_blk >= last_blk)
goto next_group;
group_data[bb_index].block_bitmap = start_blk++;
- ext4_get_group_no_and_offset(sb, start_blk - 1, &group, NULL);
+ group = ext4_get_group_number(sb, start_blk - 1);
group -= group_data[0].group;
group_data[group].free_blocks_count--;
- if (flexbg_size > 1)
- flex_gd->bg_flags[group] &= ~EXT4_BG_BLOCK_UNINIT;
+ flex_gd->bg_flags[group] &= uninit_mask;
}
/* Allocate inode bitmaps */
@@ -284,25 +289,33 @@ next_group:
if (start_blk >= last_blk)
goto next_group;
group_data[ib_index].inode_bitmap = start_blk++;
- ext4_get_group_no_and_offset(sb, start_blk - 1, &group, NULL);
+ group = ext4_get_group_number(sb, start_blk - 1);
group -= group_data[0].group;
group_data[group].free_blocks_count--;
- if (flexbg_size > 1)
- flex_gd->bg_flags[group] &= ~EXT4_BG_BLOCK_UNINIT;
+ flex_gd->bg_flags[group] &= uninit_mask;
}
/* Allocate inode tables */
for (; it_index < flex_gd->count; it_index++) {
- if (start_blk + EXT4_SB(sb)->s_itb_per_group > last_blk)
+ unsigned int itb = EXT4_SB(sb)->s_itb_per_group;
+ ext4_fsblk_t next_group_start;
+
+ if (start_blk + itb > last_blk)
goto next_group;
group_data[it_index].inode_table = start_blk;
- ext4_get_group_no_and_offset(sb, start_blk, &group, NULL);
+ group = ext4_get_group_number(sb, start_blk);
+ next_group_start = ext4_group_first_block_no(sb, group + 1);
group -= group_data[0].group;
- group_data[group].free_blocks_count -=
- EXT4_SB(sb)->s_itb_per_group;
- if (flexbg_size > 1)
- flex_gd->bg_flags[group] &= ~EXT4_BG_BLOCK_UNINIT;
+ if (start_blk + itb > next_group_start) {
+ flex_gd->bg_flags[group + 1] &= uninit_mask;
+ overhead = start_blk + itb - next_group_start;
+ group_data[group + 1].free_blocks_count -= overhead;
+ itb -= overhead;
+ }
+
+ group_data[group].free_blocks_count -= itb;
+ flex_gd->bg_flags[group] &= uninit_mask;
start_blk += EXT4_SB(sb)->s_itb_per_group;
}
@@ -333,8 +346,9 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
int err;
bh = sb_getblk(sb, blk);
- if (!bh)
- return ERR_PTR(-EIO);
+ if (unlikely(!bh))
+ return ERR_PTR(-ENOMEM);
+ BUFFER_TRACE(bh, "get_write_access");
if ((err = ext4_journal_get_write_access(handle, bh))) {
brelse(bh);
bh = ERR_PTR(err);
@@ -392,11 +406,11 @@ static int set_flexbg_block_bitmap(struct super_block *sb, handle_t *handle,
ext4_group_t group;
int err;
- ext4_get_group_no_and_offset(sb, block, &group, NULL);
+ group = ext4_get_group_number(sb, block);
start = ext4_group_first_block_no(sb, group);
group -= flex_gd->groups[0].group;
- count2 = sb->s_blocksize * 8 - (block - start);
+ count2 = EXT4_BLOCKS_PER_GROUP(sb) - (block - start);
if (count2 > count)
count2 = count;
@@ -410,9 +424,10 @@ static int set_flexbg_block_bitmap(struct super_block *sb, handle_t *handle,
return err;
bh = sb_getblk(sb, flex_gd->groups[group].block_bitmap);
- if (!bh)
- return -EIO;
+ if (unlikely(!bh))
+ return -ENOMEM;
+ BUFFER_TRACE(bh, "get_write_access");
err = ext4_journal_get_write_access(handle, bh);
if (err)
return err;
@@ -466,7 +481,7 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
meta_bg = EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG);
/* This transaction may be extended/restarted along the way */
- handle = ext4_journal_start_sb(sb, EXT4_MAX_TRANS_DATA);
+ handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, EXT4_MAX_TRANS_DATA);
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -500,11 +515,12 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
goto out;
gdb = sb_getblk(sb, block);
- if (!gdb) {
- err = -EIO;
+ if (unlikely(!gdb)) {
+ err = -ENOMEM;
goto out;
}
+ BUFFER_TRACE(gdb, "get_write_access");
err = ext4_journal_get_write_access(handle, gdb);
if (err) {
brelse(gdb);
@@ -615,7 +631,7 @@ handle_ib:
if (err)
goto out;
count = group_table_count[j];
- start = group_data[i].block_bitmap;
+ start = (&group_data[i].block_bitmap)[j];
block = start;
}
@@ -777,14 +793,17 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
goto exit_dind;
}
+ BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get_write_access");
err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
if (unlikely(err))
goto exit_dind;
+ BUFFER_TRACE(gdb_bh, "get_write_access");
err = ext4_journal_get_write_access(handle, gdb_bh);
if (unlikely(err))
goto exit_dind;
+ BUFFER_TRACE(dind, "get_write_access");
err = ext4_journal_get_write_access(handle, dind);
if (unlikely(err))
ext4_std_error(sb, err);
@@ -889,6 +908,7 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
EXT4_SB(sb)->s_group_desc = n_group_desc;
EXT4_SB(sb)->s_gdb_count++;
ext4_kvfree(o_group_desc);
+ BUFFER_TRACE(gdb_bh, "get_write_access");
err = ext4_journal_get_write_access(handle, gdb_bh);
if (unlikely(err))
brelse(gdb_bh);
@@ -964,6 +984,7 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
}
for (i = 0; i < reserved_gdb; i++) {
+ BUFFER_TRACE(primary[i], "get_write_access");
if ((err = ext4_journal_get_write_access(handle, primary[i])))
goto exit_bh;
}
@@ -1031,7 +1052,7 @@ static void update_backups(struct super_block *sb, int blk_off, char *data,
handle_t *handle;
int err = 0, err2;
- handle = ext4_journal_start_sb(sb, EXT4_MAX_TRANS_DATA);
+ handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, EXT4_MAX_TRANS_DATA);
if (IS_ERR(handle)) {
group = 1;
err = PTR_ERR(handle);
@@ -1064,13 +1085,14 @@ static void update_backups(struct super_block *sb, int blk_off, char *data,
ext4_bg_has_super(sb, group));
bh = sb_getblk(sb, backup_block);
- if (!bh) {
- err = -EIO;
+ if (unlikely(!bh)) {
+ err = -ENOMEM;
break;
}
ext4_debug("update metadata backup %llu(+%llu)\n",
backup_block, backup_block -
ext4_group_first_block_no(sb, group));
+ BUFFER_TRACE(bh, "get_write_access");
if ((err = ext4_journal_get_write_access(handle, bh)))
break;
lock_buffer(bh);
@@ -1150,6 +1172,7 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
*/
if (gdb_off) {
gdb_bh = sbi->s_group_desc[gdb_num];
+ BUFFER_TRACE(gdb_bh, "get_write_access");
err = ext4_journal_get_write_access(handle, gdb_bh);
if (!err && reserved_gdb && ext4_bg_num_gdb(sb, group))
@@ -1168,7 +1191,7 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
static struct buffer_head *ext4_get_bitmap(struct super_block *sb, __u64 block)
{
struct buffer_head *bh = sb_getblk(sb, block);
- if (!bh)
+ if (unlikely(!bh))
return NULL;
if (!bh_uptodate_or_lock(bh)) {
if (bh_submit_read(bh) < 0) {
@@ -1247,7 +1270,7 @@ static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,
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_NUM_B2C(sbi, group_data->free_blocks_count));
ext4_free_inodes_set(sb, gdp, EXT4_INODES_PER_GROUP(sb));
if (ext4_has_group_desc_csum(sb))
ext4_itable_unused_set(sb, gdp,
@@ -1341,6 +1364,8 @@ static void ext4_update_super(struct super_block *sb,
/* Update the global fs size fields */
sbi->s_groups_count += flex_gd->count;
+ sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count,
+ (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb)));
/* Update the reserved block counts only once the new group is
* active. */
@@ -1349,7 +1374,7 @@ static void ext4_update_super(struct super_block *sb,
/* Update the free space counts */
percpu_counter_add(&sbi->s_freeclusters_counter,
- EXT4_B2C(sbi, free_blocks));
+ EXT4_NUM_B2C(sbi, free_blocks));
percpu_counter_add(&sbi->s_freeinodes_counter,
EXT4_INODES_PER_GROUP(sb) * flex_gd->count);
@@ -1360,8 +1385,8 @@ static void ext4_update_super(struct super_block *sb,
sbi->s_log_groups_per_flex) {
ext4_group_t flex_group;
flex_group = ext4_flex_group(sbi, group_data[0].group);
- atomic_add(EXT4_B2C(sbi, free_blocks),
- &sbi->s_flex_groups[flex_group].free_clusters);
+ atomic64_add(EXT4_NUM_B2C(sbi, free_blocks),
+ &sbi->s_flex_groups[flex_group].free_clusters);
atomic_add(EXT4_INODES_PER_GROUP(sb) * flex_gd->count,
&sbi->s_flex_groups[flex_group].free_inodes);
}
@@ -1412,12 +1437,13 @@ static int ext4_flex_group_add(struct super_block *sb,
* modify each of the reserved GDT dindirect blocks.
*/
credit = flex_gd->count * 4 + reserved_gdb;
- handle = ext4_journal_start_sb(sb, credit);
+ handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, credit);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
goto exit;
}
+ BUFFER_TRACE(sbi->s_sbh, "get_write_access");
err = ext4_journal_get_write_access(handle, sbi->s_sbh);
if (err)
goto exit_journal;
@@ -1506,10 +1532,12 @@ static int ext4_setup_next_flex_gd(struct super_block *sb,
group_data[i].blocks_count = blocks_per_group;
overhead = ext4_group_overhead_blocks(sb, group + i);
group_data[i].free_blocks_count = blocks_per_group - overhead;
- if (ext4_has_group_desc_csum(sb))
+ if (ext4_has_group_desc_csum(sb)) {
flex_gd->bg_flags[i] = EXT4_BG_BLOCK_UNINIT |
EXT4_BG_INODE_UNINIT;
- else
+ if (!test_opt(sb, INIT_INODE_TABLE))
+ flex_gd->bg_flags[i] |= EXT4_BG_INODE_ZEROED;
+ } else
flex_gd->bg_flags[i] = EXT4_BG_INODE_ZEROED;
}
@@ -1547,11 +1575,10 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
int reserved_gdb = ext4_bg_has_super(sb, input->group) ?
le16_to_cpu(es->s_reserved_gdt_blocks) : 0;
struct inode *inode = NULL;
- int gdb_off, gdb_num;
+ int gdb_off;
int err;
__u16 bg_flags = 0;
- gdb_num = input->group / EXT4_DESC_PER_BLOCK(sb);
gdb_off = input->group % EXT4_DESC_PER_BLOCK(sb);
if (gdb_off == 0 && !EXT4_HAS_RO_COMPAT_FEATURE(sb,
@@ -1594,7 +1621,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
err = ext4_alloc_flex_bg_array(sb, input->group + 1);
if (err)
- return err;
+ goto out;
err = ext4_mb_alloc_groupinfo(sb, input->group + 1);
if (err)
@@ -1622,13 +1649,14 @@ static int ext4_group_extend_no_check(struct super_block *sb,
/* We will update the superblock, one block bitmap, and
* one group descriptor via ext4_group_add_blocks().
*/
- handle = ext4_journal_start_sb(sb, 3);
+ handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, 3);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
ext4_warning(sb, "error %d on journal start", err);
return err;
}
+ BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get_write_access");
err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
if (err) {
ext4_warning(sb, "error %d on journal write access", err);
@@ -1652,12 +1680,10 @@ errout:
err = err2;
if (!err) {
- ext4_fsblk_t first_block;
- first_block = ext4_group_first_block_no(sb, 0);
if (test_opt(sb, DEBUG))
printk(KERN_DEBUG "EXT4-fs: extended group to %llu "
"blocks\n", ext4_blocks_count(es));
- update_backups(sb, EXT4_SB(sb)->s_sbh->b_blocknr - first_block,
+ update_backups(sb, EXT4_SB(sb)->s_sbh->b_blocknr,
(char *)es, sizeof(struct ext4_super_block), 0);
}
return err;
@@ -1786,10 +1812,11 @@ static int ext4_convert_meta_bg(struct super_block *sb, struct inode *inode)
credits += 3; /* block bitmap, bg descriptor, resize inode */
}
- handle = ext4_journal_start_sb(sb, credits);
+ handle = ext4_journal_start_sb(sb, EXT4_HT_RESIZE, credits);
if (IS_ERR(handle))
return PTR_ERR(handle);
+ BUFFER_TRACE(sbi->s_sbh, "get_write_access");
err = ext4_journal_get_write_access(handle, sbi->s_sbh);
if (err)
goto errout;
@@ -1877,7 +1904,11 @@ retry:
/* Nothing need to do */
return 0;
- ext4_get_group_no_and_offset(sb, n_blocks_count - 1, &n_group, &offset);
+ n_group = ext4_get_group_number(sb, n_blocks_count - 1);
+ if (n_group > (0xFFFFFFFFUL / EXT4_INODES_PER_GROUP(sb))) {
+ ext4_warning(sb, "resize would cause inodes_count overflow");
+ return -EINVAL;
+ }
ext4_get_group_no_and_offset(sb, o_blocks_count - 1, &o_group, &offset);
n_desc_blocks = num_desc_blocks(sb, n_group + 1);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 08:03:15 +0000