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Message-Id: <20210104155706.528322192@linuxfoundation.org>
Date: Mon, 4 Jan 2021 16:57:15 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Jubin Zhong <zhongjubin@...wei.com>,
lizhe <lizhe67@...wei.com>, Richard Weinberger <richard@....at>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 16/47] jffs2: Allow setting rp_size to zero during remounting
From: lizhe <lizhe67@...wei.com>
[ Upstream commit cd3ed3c73ac671ff6b0230ccb72b8300292d3643 ]
Set rp_size to zero will be ignore during remounting.
The method to identify whether we input a remounting option of
rp_size is to check if the rp_size input is zero. It can not work
well if we pass "rp_size=0".
This patch add a bool variable "set_rp_size" to fix this problem.
Reported-by: Jubin Zhong <zhongjubin@...wei.com>
Signed-off-by: lizhe <lizhe67@...wei.com>
Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
fs/jffs2/jffs2_fs_sb.h | 1 +
fs/jffs2/super.c | 7 +++++--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h
index 778275f48a879..5a7091746f68b 100644
--- a/fs/jffs2/jffs2_fs_sb.h
+++ b/fs/jffs2/jffs2_fs_sb.h
@@ -38,6 +38,7 @@ struct jffs2_mount_opts {
* users. This is implemented simply by means of not allowing the
* latter users to write to the file system if the amount if the
* available space is less then 'rp_size'. */
+ bool set_rp_size;
unsigned int rp_size;
};
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 60636b2e35ea4..68ce77cbeed3b 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -88,7 +88,7 @@ static int jffs2_show_options(struct seq_file *s, struct dentry *root)
if (opts->override_compr)
seq_printf(s, ",compr=%s", jffs2_compr_name(opts->compr));
- if (opts->rp_size)
+ if (opts->set_rp_size)
seq_printf(s, ",rp_size=%u", opts->rp_size / 1024);
return 0;
@@ -212,6 +212,7 @@ static int jffs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
if (opt > c->mtd->size)
return invalf(fc, "jffs2: Too large reserve pool specified, max is %llu KB",
c->mtd->size / 1024);
+ c->mount_opts.set_rp_size = true;
c->mount_opts.rp_size = opt;
break;
default:
@@ -231,8 +232,10 @@ static inline void jffs2_update_mount_opts(struct fs_context *fc)
c->mount_opts.override_compr = new_c->mount_opts.override_compr;
c->mount_opts.compr = new_c->mount_opts.compr;
}
- if (new_c->mount_opts.rp_size)
+ if (new_c->mount_opts.set_rp_size) {
+ c->mount_opts.set_rp_size = new_c->mount_opts.set_rp_size;
c->mount_opts.rp_size = new_c->mount_opts.rp_size;
+ }
mutex_unlock(&c->alloc_sem);
}
--
2.27.0
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