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erofs: initialize decompression early

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[ Upstream commit fe1e57d44d7f106df9048e815e4862cf63921220 ]

 - Rename erofs_init_managed_cache() to z_erofs_init_super();
 - Move the initialization of managed_pslots into z_erofs_init_super() too;
 - Move z_erofs_init_super() and packed inode preparation upwards, before
   the root inode initialization.

Therefore, the root directory can also be compressible.

Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Acked-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20250317054840.3483000-1-hsiangkao@linux.alibaba.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gao Xiang
2025-03-17 13:48:40 +08:00
committed by Greg Kroah-Hartman
parent c8c643809f
commit b35ccfdc85
3 changed files with 26 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
fs/erofs/internal.h
View File

@@ -453,6 +453,7 @@ int __init erofs_init_shrinker(void);
void erofs_exit_shrinker(void);
int __init z_erofs_init_subsystem(void);
void z_erofs_exit_subsystem(void);
int z_erofs_init_super(struct super_block *sb);
unsigned long z_erofs_shrink_scan(struct erofs_sb_info *sbi,
unsigned long nr_shrink);
int z_erofs_map_blocks_iter(struct inode *inode, struct erofs_map_blocks *map,
@@ -462,7 +463,6 @@ void z_erofs_put_gbuf(void *ptr);
int z_erofs_gbuf_growsize(unsigned int nrpages);
int __init z_erofs_gbuf_init(void);
void z_erofs_gbuf_exit(void);
int erofs_init_managed_cache(struct super_block *sb);
int z_erofs_parse_cfgs(struct super_block *sb, struct erofs_super_block *dsb);
#else
static inline void erofs_shrinker_register(struct super_block *sb) {}
@@ -471,7 +471,7 @@ static inline int erofs_init_shrinker(void) { return 0; }
static inline void erofs_exit_shrinker(void) {}
static inline int z_erofs_init_subsystem(void) { return 0; }
static inline void z_erofs_exit_subsystem(void) {}
static inline int erofs_init_managed_cache(struct super_block *sb) { return 0; }
static inline int z_erofs_init_super(struct super_block *sb) { return 0; }
#endif /* !CONFIG_EROFS_FS_ZIP */
#ifdef CONFIG_EROFS_FS_BACKED_BY_FILE

46
fs/erofs/super.c
View File

@@ -664,9 +664,16 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc)
else
sb->s_flags &= ~SB_POSIXACL;
#ifdef CONFIG_EROFS_FS_ZIP
xa_init(&sbi->managed_pslots);
#endif
err = z_erofs_init_super(sb);
if (err)
return err;
if (erofs_sb_has_fragments(sbi) && sbi->packed_nid) {
inode = erofs_iget(sb, sbi->packed_nid);
if (IS_ERR(inode))
return PTR_ERR(inode);
sbi->packed_inode = inode;
}
inode = erofs_iget(sb, sbi->root_nid);
if (IS_ERR(inode))
@@ -678,24 +685,11 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc)
iput(inode);
return -EINVAL;
}
sb->s_root = d_make_root(inode);
if (!sb->s_root)
return -ENOMEM;
erofs_shrinker_register(sb);
if (erofs_sb_has_fragments(sbi) && sbi->packed_nid) {
sbi->packed_inode = erofs_iget(sb, sbi->packed_nid);
if (IS_ERR(sbi->packed_inode)) {
err = PTR_ERR(sbi->packed_inode);
sbi->packed_inode = NULL;
return err;
}
}
err = erofs_init_managed_cache(sb);
if (err)
return err;
err = erofs_xattr_prefixes_init(sb);
if (err)
return err;
@@ -831,6 +825,16 @@ static int erofs_init_fs_context(struct fs_context *fc)
return 0;
}
static void erofs_drop_internal_inodes(struct erofs_sb_info *sbi)
{
iput(sbi->packed_inode);
sbi->packed_inode = NULL;
#ifdef CONFIG_EROFS_FS_ZIP
iput(sbi->managed_cache);
sbi->managed_cache = NULL;
#endif
}
static void erofs_kill_sb(struct super_block *sb)
{
struct erofs_sb_info *sbi = EROFS_SB(sb);
@@ -840,6 +844,7 @@ static void erofs_kill_sb(struct super_block *sb)
kill_anon_super(sb);
else
kill_block_super(sb);
erofs_drop_internal_inodes(sbi);
fs_put_dax(sbi->dif0.dax_dev, NULL);
erofs_fscache_unregister_fs(sb);
erofs_sb_free(sbi);
@@ -850,17 +855,10 @@ static void erofs_put_super(struct super_block *sb)
{
struct erofs_sb_info *const sbi = EROFS_SB(sb);
DBG_BUGON(!sbi);
erofs_unregister_sysfs(sb);
erofs_shrinker_unregister(sb);
erofs_xattr_prefixes_cleanup(sb);
#ifdef CONFIG_EROFS_FS_ZIP
iput(sbi->managed_cache);
sbi->managed_cache = NULL;
#endif
iput(sbi->packed_inode);
sbi->packed_inode = NULL;
erofs_drop_internal_inodes(sbi);
erofs_free_dev_context(sbi->devs);
sbi->devs = NULL;
erofs_fscache_unregister_fs(sb);

4
fs/erofs/zdata.c
View File

@@ -663,18 +663,18 @@ static const struct address_space_operations z_erofs_cache_aops = {
.invalidate_folio = z_erofs_cache_invalidate_folio,
};
int erofs_init_managed_cache(struct super_block *sb)
int z_erofs_init_super(struct super_block *sb)
{
struct inode *const inode = new_inode(sb);
if (!inode)
return -ENOMEM;
set_nlink(inode, 1);
inode->i_size = OFFSET_MAX;
inode->i_mapping->a_ops = &z_erofs_cache_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_KERNEL);
EROFS_SB(sb)->managed_cache = inode;
xa_init(&EROFS_SB(sb)->managed_pslots);
return 0;
}