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 outpt for bdev case, and "erofs/[domain_id,]<fs_id>" will be output for non-bdev case.
Signed-off-by: Huang Xiaojia <huangxiaoj...@huawei.com> --- v2: handle non-bdev case. v1: https://lore.kernel.org/all/20240624063801.2476116-1-huangxiaoj...@huawei.com/ --- fs/erofs/super.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 1b91d9513013..a24b6907363c 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -576,6 +576,20 @@ 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); + } else { + 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 +657,7 @@ 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); -- 2.34.1
