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| author | Sage Weil <sage@newdream.net> | 2010-09-11 21:55:25 +0400 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2010-09-11 21:55:25 +0400 |
| commit | a77d9f7dce7600058d56f0670ed29d77abffcde2 (patch) | |
| tree | 60c0b90d2f3af86e9d65641f61ceca075ed61fdf /fs/ceph | |
| parent | 3612abbd5df6baa9ca3e0777c6c8646e202d3f66 (diff) | |
| download | linux-a77d9f7dce7600058d56f0670ed29d77abffcde2.tar.xz | |
ceph: fix file offset wrapping at 4GB on 32-bit archs
Cast the value before shifting so that we don't run out of bits with a
32-bit unsigned long. This fixes wrapping of high file offsets into the
low 4GB of a file on disk, and the subsequent data corruption for large
files.
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/addr.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 4cfce1ee31fa..50461b8c23a4 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -766,7 +766,8 @@ get_more_pages: /* ok */ if (locked_pages == 0) { /* prepare async write request */ - offset = page->index << PAGE_CACHE_SHIFT; + offset = (unsigned long long)page->index + << PAGE_CACHE_SHIFT; len = wsize; req = ceph_osdc_new_request(&client->osdc, &ci->i_layout, |