diff options
| author | Russell King | 2019-06-04 14:50:09 +0100 |
|---|---|---|
| committer | Al Viro | 2019-06-26 20:14:14 -0400 |
| commit | 4c5762f5f5e31d493678b0ee6f73585355dd3638 (patch) | |
| tree | 64e50ca6142ff261d5d412f7912ba1af10f14bc4 | |
| parent | 421d3c0faa28890dbfb7d2a67f067f07c1123556 (diff) | |
fs/adfs: super: safely update options on remount
Only update the options on remount if we successfully parse all options,
rather than updating those we've managed to parse.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/adfs/super.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/adfs/super.c b/fs/adfs/super.c index b393905abe13..2f81c1c29757 100644 --- a/fs/adfs/super.c +++ b/fs/adfs/super.c @@ -170,10 +170,10 @@ static const match_table_t tokens = { {Opt_err, NULL} }; -static int parse_options(struct super_block *sb, char *options) +static int parse_options(struct super_block *sb, struct adfs_sb_info *asb, + char *options) { char *p; - struct adfs_sb_info *asb = ADFS_SB(sb); int option; if (!options) @@ -228,9 +228,18 @@ static int parse_options(struct super_block *sb, char *options) static int adfs_remount(struct super_block *sb, int *flags, char *data) { + struct adfs_sb_info temp_asb; + int ret; + sync_filesystem(sb); *flags |= ADFS_SB_FLAGS; - return parse_options(sb, data); + + temp_asb = *ADFS_SB(sb); + ret = parse_options(sb, &temp_asb, data); + if (ret == 0) + *ADFS_SB(sb) = temp_asb; + + return ret; } static int adfs_statfs(struct dentry *dentry, struct kstatfs *buf) @@ -387,7 +396,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent) asb->s_other_mask = ADFS_DEFAULT_OTHER_MASK; asb->s_ftsuffix = 0; - if (parse_options(sb, data)) + if (parse_options(sb, asb, data)) goto error; sb_set_blocksize(sb, BLOCK_SIZE); |