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ext4: add correct group descriptors and reserved GDT blocks to system zone 

When setup_system_zone, flex_bg is not initialized so it is always 1.
Use a new helper function, ext4_num_base_meta_blocks() which does not
depend on sbi->s_log_groups_per_flex being initialized.

[ Squashed two patches in the Link URL's below together into a single
  commit, which is simpler to review/understand.  Also fix checkpatch
  warnings. --TYT ]

Cc: stable@kernel.org
Signed-off-by: Wang Jianjian <wangjianjian0@foxmail.com>
Link: https://lore.kernel.org/r/tencent_21AF0D446A9916ED5C51492CC6C9A0A77B05@qq.com
Link: https://lore.kernel.org/r/tencent_D744D1450CC169AEA77FCF0A64719909ED05@qq.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Wang Jianjian 2023-08-03 00:28:39 +08:00 committed by Theodore Ts'o
parent b6c7d6dc8a
commit 68228da51c
3 changed files with 17 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
fs/ext4/balloc.c
View File

@ -913,11 +913,11 @@ unsigned long ext4_bg_num_gdb(struct super_block *sb, ext4_group_t group)
} }
/* /*
* This function returns the number of file system metadata clusters at * This function returns the number of file system metadata blocks at
* the beginning of a block group, including the reserved gdt blocks. * the beginning of a block group, including the reserved gdt blocks.
*/ */
static unsigned ext4_num_base_meta_clusters(struct super_block *sb, unsigned int ext4_num_base_meta_blocks(struct super_block *sb,
ext4_group_t block_group) ext4_group_t block_group)
{ {
struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_sb_info *sbi = EXT4_SB(sb);
unsigned num; unsigned num;
@ -935,8 +935,15 @@ static unsigned ext4_num_base_meta_clusters(struct super_block *sb,
} else { /* For META_BG_BLOCK_GROUPS */ } else { /* For META_BG_BLOCK_GROUPS */
num += ext4_bg_num_gdb_meta(sb, block_group); num += ext4_bg_num_gdb_meta(sb, block_group);
} }
return EXT4_NUM_B2C(sbi, num); return num;
} }
static unsigned int ext4_num_base_meta_clusters(struct super_block *sb,
ext4_group_t block_group)
{
return EXT4_NUM_B2C(EXT4_SB(sb), ext4_num_base_meta_blocks(sb, block_group));
}
/** /**
* ext4_inode_to_goal_block - return a hint for block allocation * ext4_inode_to_goal_block - return a hint for block allocation
* @inode: inode for block allocation * @inode: inode for block allocation

8
fs/ext4/block_validity.c
View File

@ -215,7 +215,6 @@ int ext4_setup_system_zone(struct super_block *sb)
struct ext4_system_blocks *system_blks; struct ext4_system_blocks *system_blks;
struct ext4_group_desc *gdp; struct ext4_group_desc *gdp;
ext4_group_t i; ext4_group_t i;
int flex_size = ext4_flex_bg_size(sbi);
int ret; int ret;
system_blks = kzalloc(sizeof(*system_blks), GFP_KERNEL); system_blks = kzalloc(sizeof(*system_blks), GFP_KERNEL);
@ -223,12 +222,13 @@ int ext4_setup_system_zone(struct super_block *sb)
return -ENOMEM; return -ENOMEM;
for (i=0; i < ngroups; i++) { for (i=0; i < ngroups; i++) {
unsigned int meta_blks = ext4_num_base_meta_blocks(sb, i);
cond_resched(); cond_resched();
if (ext4_bg_has_super(sb, i) && if (meta_blks != 0) {
((i < 5) || ((i % flex_size) == 0))) {
ret = add_system_zone(system_blks, ret = add_system_zone(system_blks,
ext4_group_first_block_no(sb, i), ext4_group_first_block_no(sb, i),
ext4_bg_num_gdb(sb, i) + 1, 0); meta_blks, 0);
if (ret) if (ret)
goto err; goto err;
} }

2
fs/ext4/ext4.h
View File

@ -3079,6 +3079,8 @@ extern const char *ext4_decode_error(struct super_block *sb, int errno,
extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb, extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb,
ext4_group_t block_group, ext4_group_t block_group,
unsigned int flags); unsigned int flags);
extern unsigned int ext4_num_base_meta_blocks(struct super_block *sb,
ext4_group_t block_group);
extern __printf(7, 8) extern __printf(7, 8)
void __ext4_error(struct super_block *, const char *, unsigned int, bool, void __ext4_error(struct super_block *, const char *, unsigned int, bool,