diff options
| -rw-r--r-- | fs/super.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/fs/super.c b/fs/super.c index 52ed93eb63df..a369f8964dc1 100644 --- a/fs/super.c +++ b/fs/super.c @@ -702,12 +702,22 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force) return -EACCES; #endif - if (flags & MS_RDONLY) - acct_auto_close(&sb->s_pins); - shrink_dcache_sb(sb); - remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY); + if (remount_ro) { + if (sb->s_pins.first) { + up_write(&sb->s_umount); + acct_auto_close(&sb->s_pins); + down_write(&sb->s_umount); + if (!sb->s_root) + return 0; + if (sb->s_writers.frozen != SB_UNFROZEN) + return -EBUSY; + remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY); + } + } + shrink_dcache_sb(sb); + /* If we are remounting RDONLY and current sb is read/write, make sure there are no rw files opened */ if (remount_ro) { |