diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-24 12:12:40 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-24 12:12:40 -0800 |
| commit | d2346963bfcbb9a8ee783ca3c3b3bdd7448ec9d5 (patch) | |
| tree | 4ba57a6ec31f3a4683e7766fbf4f182d459a8b51 /fs/ext2/ioctl.c | |
| parent | 4a7cbb56fdbd92a47f57ca8b25bf5db35f0d6518 (diff) | |
| parent | 46fe44ce8777f087aa8ad4a2605fdcfb9c2d63af (diff) | |
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
quota: Pass information that quota is stored in system file to userspace
ext2: protect inode changes in the SETVERSION and SETFLAGS ioctls
jbd: Issue cache flush after checkpointing
Diffstat (limited to 'fs/ext2/ioctl.c')
| -rw-r--r-- | fs/ext2/ioctl.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c index 1089f760c847..2de655f5d625 100644 --- a/fs/ext2/ioctl.c +++ b/fs/ext2/ioctl.c @@ -77,10 +77,11 @@ long ext2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) flags = flags & EXT2_FL_USER_MODIFIABLE; flags |= oldflags & ~EXT2_FL_USER_MODIFIABLE; ei->i_flags = flags; - mutex_unlock(&inode->i_mutex); ext2_set_inode_flags(inode); inode->i_ctime = CURRENT_TIME_SEC; + mutex_unlock(&inode->i_mutex); + mark_inode_dirty(inode); setflags_out: mnt_drop_write_file(filp); @@ -88,20 +89,29 @@ setflags_out: } case EXT2_IOC_GETVERSION: return put_user(inode->i_generation, (int __user *) arg); - case EXT2_IOC_SETVERSION: + case EXT2_IOC_SETVERSION: { + __u32 generation; + if (!inode_owner_or_capable(inode)) return -EPERM; ret = mnt_want_write_file(filp); if (ret) return ret; - if (get_user(inode->i_generation, (int __user *) arg)) { + if (get_user(generation, (int __user *) arg)) { ret = -EFAULT; - } else { - inode->i_ctime = CURRENT_TIME_SEC; - mark_inode_dirty(inode); + goto setversion_out; } + + mutex_lock(&inode->i_mutex); + inode->i_ctime = CURRENT_TIME_SEC; + inode->i_generation = generation; + mutex_unlock(&inode->i_mutex); + + mark_inode_dirty(inode); +setversion_out: mnt_drop_write_file(filp); return ret; + } case EXT2_IOC_GETRSVSZ: if (test_opt(inode->i_sb, RESERVATION) && S_ISREG(inode->i_mode) |