diff options
author | Michael Marineau <mike@marineau.org> | 2008-02-05 01:28:48 -0500 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 12:44:15 -0500 |
commit | 818db35992c249dc32c1d86daf7d533fb0952f5d (patch) | |
tree | 8577fe7cff367eade84f632621b16054c362d39a /block/blk-barrier.c | |
parent | 5b04c6890f0dc7ea6c85b9adebc883c55c667d97 (diff) |
tmpfs: fix mounts when size is less than the page size
When tmpfs is mounted with a size less than one page, the number of blocks
is set to 0 which makes the tmpfs mount unlimited. This can lead to a
quick and surprising death if someone typos a tmpfs mount command and
writes too much.
tmpfs can still be mounted as unlimited if size or nr_blocks is exactly 0,
as Documentation/filesystems/tmpfs.txt says.
Hugh: do this by rounding size up instead of down in all cases: which
slightly expands other odd-sized tmpfs mounts, but in a consistent way.
Signed-off-by: Michael Marineau <mike@marineau.org>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block/blk-barrier.c')
0 files changed, 0 insertions, 0 deletions