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authorlizhe <lizhe67@huawei.com>2020-10-14 09:54:43 +0300
committerRichard Weinberger <richard@nod.at>2020-12-13 23:56:24 +0300
commitcd3ed3c73ac671ff6b0230ccb72b8300292d3643 (patch)
tree4d7b572a99b64e0440f07170ff75a8509917d1ec /fs/jffs2
parent08cd274f9b8283a1da93e2ccab216a336da83525 (diff)
downloadlinux-cd3ed3c73ac671ff6b0230ccb72b8300292d3643.tar.xz
jffs2: Allow setting rp_size to zero during remounting
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@huawei.com> Signed-off-by: lizhe <lizhe67@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs/jffs2')
-rw-r--r--fs/jffs2/jffs2_fs_sb.h1
-rw-r--r--fs/jffs2/super.c7
2 files changed, 6 insertions, 2 deletions
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h
index 778275f48a87..5a7091746f68 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 4fd297bdf0f3..c523adaca79f 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;
@@ -206,6 +206,7 @@ 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:
@@ -225,8 +226,10 @@ 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);
}