From 37c90c5fae701983e21cc80396649e3aca7f4fa1 Mon Sep 17 00:00:00 2001 From: Jeffle Xu Date: Mon, 25 Apr 2022 20:21:37 +0800 Subject: [PATCH] erofs: register fscache context for primary data blob Registers fscache context for primary data blob. Also move the initialization of s_op and related fields forward, since anonymous inode will be allocated under the super block when registering the fscache context. Something worth mentioning about the cleanup routine. 1. The fscache context will instantiate anonymous inodes under the super block. Release these anonymous inodes when .put_super() is called, or we'll get "VFS: Busy inodes after unmount." warning. 2. The fscache context is initialized prior to the root inode. If .kill_sb() is called when mount failed, .put_super() won't be called when root inode has not been initialized yet. Thus .kill_sb() shall also contain the cleanup routine. Signed-off-by: Jeffle Xu Reviewed-by: Gao Xiang Link: https://lore.kernel.org/r/20220425122143.56815-16-jefflexu@linux.alibaba.com Acked-by: Chao Yu Signed-off-by: Gao Xiang --- fs/erofs/internal.h | 1 + fs/erofs/super.c | 15 +++++++++++---- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index 6ac5f68911e9..1a5eb6193932 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -155,6 +155,7 @@ struct erofs_sb_info { /* fscache support */ struct fscache_volume *volume; + struct erofs_fscache *s_fscache; }; #define EROFS_SB(sb) ((struct erofs_sb_info *)(sb)->s_fs_info) diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 402f919eef6b..84b976636d22 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -628,6 +628,9 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) int err; sb->s_magic = EROFS_SUPER_MAGIC; + sb->s_flags |= SB_RDONLY | SB_NOATIME; + sb->s_maxbytes = MAX_LFS_FILESIZE; + sb->s_op = &erofs_sops; sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) @@ -645,6 +648,11 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) err = erofs_fscache_register_fs(sb); if (err) return err; + + err = erofs_fscache_register_cookie(sb, &sbi->s_fscache, + sbi->opt.fsid, true); + if (err) + return err; } else { if (!sb_set_blocksize(sb, EROFS_BLKSIZ)) { erofs_err(sb, "failed to set erofs blksize"); @@ -667,11 +675,8 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) clear_opt(&sbi->opt, DAX_ALWAYS); } } - sb->s_flags |= SB_RDONLY | SB_NOATIME; - sb->s_maxbytes = MAX_LFS_FILESIZE; - sb->s_time_gran = 1; - sb->s_op = &erofs_sops; + sb->s_time_gran = 1; sb->s_xattr = erofs_xattr_handlers; sb->s_export_op = &erofs_export_ops; @@ -812,6 +817,7 @@ static void erofs_kill_sb(struct super_block *sb) erofs_free_dev_context(sbi->devs); fs_put_dax(sbi->dax_dev); + erofs_fscache_unregister_cookie(&sbi->s_fscache); erofs_fscache_unregister_fs(sb); kfree(sbi); sb->s_fs_info = NULL; @@ -830,6 +836,7 @@ static void erofs_put_super(struct super_block *sb) iput(sbi->managed_cache); sbi->managed_cache = NULL; #endif + erofs_fscache_unregister_cookie(&sbi->s_fscache); } static struct file_system_type erofs_fs_type = {