Commit 684b290a authored by Huang Xiaojia's avatar Huang Xiaojia Committed by Gao Xiang
Browse files

erofs: add support for FS_IOC_GETFSSYSFSPATH 



FS_IOC_GETFSSYSFSPATH ioctl exposes /sys/fs path of a given filesystem,
potentially standarizing sysfs reporting. This patch add support for
FS_IOC_GETFSSYSFSPATH for erofs, "erofs/<dev>" will be outputted for bdev
cases, "erofs/[domain_id,]<fs_id>" will be outputted for fscache cases.

Signed-off-by: default avatarHuang Xiaojia <huangxiaojia2@huawei.com>
Link: https://lore.kernel.org/r/20240720082335.441563-1-huangxiaojia2@huawei.com


Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarGao Xiang <hsiangkao@linux.alibaba.com>
parent 7dc5537c

fs/erofs/super.c

+16 −0
Original line number Diff line number Diff line
@@ -576,6 +576,21 @@ static const struct export_operations erofs_export_ops = { 
	.get_parent = erofs_get_parent,

};



static void erofs_set_sysfs_name(struct super_block *sb)

{

	struct erofs_sb_info *sbi = EROFS_SB(sb);



	if (erofs_is_fscache_mode(sb)) {

		if (sbi->domain_id)

			super_set_sysfs_name_generic(sb, "%s,%s",sbi->domain_id,

						     sbi->fsid);

		else

			super_set_sysfs_name_generic(sb, "%s", sbi->fsid);

		return;

	}

	super_set_sysfs_name_id(sb);

}



static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc)

{

	struct inode *inode;
@@ -643,6 +658,7 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) 
		sb->s_flags |= SB_POSIXACL;

	else

		sb->s_flags &= ~SB_POSIXACL;

	erofs_set_sysfs_name(sb);



#ifdef CONFIG_EROFS_FS_ZIP

	xa_init(&sbi->managed_pslots);