From 9277a6d4fbd4aaa668b19b819015f87f0da53a38 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Tue, 12 Apr 2022 16:25:34 +0900 Subject: zonefs: Export open zone resource information through sysfs To allow applications to easily check the current usage status of the open zone resources of the mounted device, export through sysfs the counter of write open sequential files s_wro_seq_files field of struct zonefs_sb_info. The attribute is named nr_wro_seq_files and is read only. The maximum number of write open sequential files (zones) indicated by the s_max_wro_seq_files field of struct zonefs_sb_info is also exported as the read only attribute max_wro_seq_files. Signed-off-by: Damien Le Moal Reviewed-by: Johannes Thumshirn Reviewed-by: Hans Holmberg --- fs/zonefs/super.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) (limited to 'fs/zonefs/super.c') diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c index 02dbdec32b2f..aa359f27102e 100644 --- a/fs/zonefs/super.c +++ b/fs/zonefs/super.c @@ -1725,6 +1725,10 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent) if (ret) goto cleanup; + ret = zonefs_sysfs_register(sb); + if (ret) + goto cleanup; + zonefs_info(sb, "Mounting %u zones", blkdev_nr_zones(sb->s_bdev->bd_disk)); @@ -1770,6 +1774,8 @@ static void zonefs_kill_super(struct super_block *sb) if (sb->s_root) d_genocide(sb->s_root); + + zonefs_sysfs_unregister(sb); kill_block_super(sb); kfree(sbi); } @@ -1817,16 +1823,26 @@ static int __init zonefs_init(void) return ret; ret = register_filesystem(&zonefs_type); - if (ret) { - zonefs_destroy_inodecache(); - return ret; - } + if (ret) + goto destroy_inodecache; + + ret = zonefs_sysfs_init(); + if (ret) + goto unregister_fs; return 0; + +unregister_fs: + unregister_filesystem(&zonefs_type); +destroy_inodecache: + zonefs_destroy_inodecache(); + + return ret; } static void __exit zonefs_exit(void) { + zonefs_sysfs_exit(); zonefs_destroy_inodecache(); unregister_filesystem(&zonefs_type); } -- cgit v1.2.3