linux-kernel - [PATCH 5.10 172/172] zonefs: fix handling of explicit

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Date:   Mon, 13 Jun 2022 12:12:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Christoph Hellwig <hch@....de>,
        Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH 5.10 172/172] zonefs: fix handling of explicit_open option on mount

From: Damien Le Moal <damien.lemoal@...nsource.wdc.com>

commit a2a513be7139b279f1b5b2cee59c6c4950c34346 upstream.

Ignoring the explicit_open mount option on mount for devices that do not
have a limit on the number of open zones must be done after the mount
options are parsed and set in s_mount_opts. Move the check to ignore
the explicit_open option after the call to zonefs_parse_options() in
zonefs_fill_super().

Fixes: b5c00e975779 ("zonefs: open/close zone on file open/close")
Cc: <stable@...r.kernel.org>
Signed-off-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Reviewed-by: Christoph Hellwig <hch@....de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/zonefs/super.c |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -1706,11 +1706,6 @@ static int zonefs_fill_super(struct supe
 	sbi->s_mount_opts = ZONEFS_MNTOPT_ERRORS_RO;
 	sbi->s_max_open_zones = bdev_max_open_zones(sb->s_bdev);
 	atomic_set(&sbi->s_open_zones, 0);
-	if (!sbi->s_max_open_zones &&
-	    sbi->s_mount_opts & ZONEFS_MNTOPT_EXPLICIT_OPEN) {
-		zonefs_info(sb, "No open zones limit. Ignoring explicit_open mount option\n");
-		sbi->s_mount_opts &= ~ZONEFS_MNTOPT_EXPLICIT_OPEN;
-	}
 
 	ret = zonefs_read_super(sb);
 	if (ret)
@@ -1729,6 +1724,12 @@ static int zonefs_fill_super(struct supe
 	zonefs_info(sb, "Mounting %u zones",
 		    blkdev_nr_zones(sb->s_bdev->bd_disk));
 
+	if (!sbi->s_max_open_zones &&
+	    sbi->s_mount_opts & ZONEFS_MNTOPT_EXPLICIT_OPEN) {
+		zonefs_info(sb, "No open zones limit. Ignoring explicit_open mount option\n");
+		sbi->s_mount_opts &= ~ZONEFS_MNTOPT_EXPLICIT_OPEN;
+	}
+
 	/* Create root directory inode */
 	ret = -ENOMEM;
 	inode = new_inode(sb);