diff options
| author | Hugh Dickins <hughd@google.com> | 2014-06-23 13:22:03 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-26 15:17:37 -0400 |
| commit | 264b86651c0986b4cf3b1e3ff48449d7afbaf0d5 (patch) | |
| tree | 616b9f6cc981b3e720d114f6d2f519aeed91f124 | |
| parent | faff2e120db87ccf375d54c840c6bca6260bc569 (diff) | |
tmpfs: ZERO_RANGE and COLLAPSE_RANGE not currently supported
commit 13ace4d0d9db40e10ecd66dfda14e297571be813 upstream.
I was well aware of FALLOC_FL_ZERO_RANGE and FALLOC_FL_COLLAPSE_RANGE
support being added to fallocate(); but didn't realize until now that I
had been too stupid to future-proof shmem_fallocate() against new
additions. -EOPNOTSUPP instead of going on to ordinary fallocation.
Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | mm/shmem.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index 9f70e02111c..a2801ba8ae2 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1728,6 +1728,9 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset, pgoff_t start, index, end; int error; + if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) + return -EOPNOTSUPP; + mutex_lock(&inode->i_mutex); if (mode & FALLOC_FL_PUNCH_HOLE) { |