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erofs: add erofs_sb_free() helper

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Unify the common parts of erofs_fc_free() and erofs_kill_sb() as
erofs_sb_free().

Thus, fput() in erofs_fc_get_tree() is no longer needed, too.

Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20241212133504.2047178-1-hsiangkao@linux.alibaba.com
This commit is contained in:
Gao Xiang 2024-12-12 21:35:01 +08:00
parent 6d1917045e
commit e2de3c1bf6
1 changed files with 20 additions and 18 deletions
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38
fs/erofs/super.c
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@ -703,16 +703,19 @@ static int erofs_fc_get_tree(struct fs_context *fc)
GET_TREE_BDEV_QUIET_LOOKUP : 0);
#ifdef CONFIG_EROFS_FS_BACKED_BY_FILE
if (ret == -ENOTBLK) {
struct file *file;
if (!fc->source)
return invalf(fc, "No source specified");
sbi->fdev = filp_open(fc->source, O_RDONLY | O_LARGEFILE, 0);
if (IS_ERR(sbi->fdev))
return PTR_ERR(sbi->fdev);
file = filp_open(fc->source, O_RDONLY | O_LARGEFILE, 0);
if (IS_ERR(file))
return PTR_ERR(file);
sbi->fdev = file;
if (S_ISREG(file_inode(sbi->fdev)->i_mode) &&
sbi->fdev->f_mapping->a_ops->read_folio)
return get_tree_nodev(fc, erofs_fc_fill_super);
fput(sbi->fdev);
}
#endif
return ret;
@ -763,17 +766,22 @@ static void erofs_free_dev_context(struct erofs_dev_context *devs)
kfree(devs);
}
static void erofs_sb_free(struct erofs_sb_info *sbi)
{
erofs_free_dev_context(sbi->devs);
kfree(sbi->fsid);
kfree(sbi->domain_id);
if (sbi->fdev)
fput(sbi->fdev);
kfree(sbi);
}
static void erofs_fc_free(struct fs_context *fc)
{
struct erofs_sb_info *sbi = fc->s_fs_info;
if (!sbi)
return;
erofs_free_dev_context(sbi->devs);
kfree(sbi->fsid);
kfree(sbi->domain_id);
kfree(sbi);
if (sbi) /* free here if an error occurs before transferring to sb */
erofs_sb_free(sbi);
}
static const struct fs_context_operations erofs_context_ops = {
@ -813,15 +821,9 @@ static void erofs_kill_sb(struct super_block *sb)
kill_anon_super(sb);
else
kill_block_super(sb);
erofs_free_dev_context(sbi->devs);
fs_put_dax(sbi->dax_dev, NULL);
erofs_fscache_unregister_fs(sb);
kfree(sbi->fsid);
kfree(sbi->domain_id);
if (sbi->fdev)
fput(sbi->fdev);
kfree(sbi);
erofs_sb_free(sbi);
sb->s_fs_info = NULL;
}