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| author | lizhe <lizhe67@huawei.com> | 2020-10-14 14:54:42 +0800 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2020-12-13 21:55:59 +0100 |
| commit | 08cd274f9b8283a1da93e2ccab216a336da83525 (patch) | |
| tree | 215258dd6a22fc6ce47418913d5fabc44e32a622 /fs/jffs2 | |
| parent | 9afc9a8a4909fece0e911e72b1060614ba2f7969 (diff) | |
| download | linux-08cd274f9b8283a1da93e2ccab216a336da83525.tar.gz linux-08cd274f9b8283a1da93e2ccab216a336da83525.tar.xz | |
jffs2: Fix ignoring mounting options problem during remounting
The jffs2 mount options will be ignored when remounting jffs2.
It can be easily reproduced with the steps listed below.
1. mount -t jffs2 -o compr=none /dev/mtdblockx /mnt
2. mount -o remount compr=zlib /mnt
Since ec10a24f10c8, the option parsing happens before fill_super and
then pass fc, which contains the options parsing results, to function
jffs2_reconfigure during remounting. But function jffs2_reconfigure do
not update c->mount_opts.
This patch add a function jffs2_update_mount_opts to fix this problem.
By the way, I notice that tmpfs use the same way to update remounting
options. If it is necessary to unify them?
Cc: <stable@vger.kernel.org>
Fixes: ec10a24f10c8 ("vfs: Convert jffs2 to use the new mount API")
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/super.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c index 05d7878dfad1..4fd297bdf0f3 100644 --- a/fs/jffs2/super.c +++ b/fs/jffs2/super.c @@ -215,11 +215,28 @@ static int jffs2_parse_param(struct fs_context *fc, struct fs_parameter *param) return 0; } +static inline void jffs2_update_mount_opts(struct fs_context *fc) +{ + struct jffs2_sb_info *new_c = fc->s_fs_info; + struct jffs2_sb_info *c = JFFS2_SB_INFO(fc->root->d_sb); + + mutex_lock(&c->alloc_sem); + if (new_c->mount_opts.override_compr) { + 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) + c->mount_opts.rp_size = new_c->mount_opts.rp_size; + mutex_unlock(&c->alloc_sem); +} + static int jffs2_reconfigure(struct fs_context *fc) { struct super_block *sb = fc->root->d_sb; sync_filesystem(sb); + jffs2_update_mount_opts(fc); + return jffs2_do_remount_fs(sb, fc); } |