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| author | Alex Elder <elder@dreamhost.com> | 2012-03-08 16:50:09 -0600 |
|---|---|---|
| committer | Alex Elder <elder@dreamhost.com> | 2012-03-22 10:47:52 -0500 |
| commit | 3489b42a72a41d477665ab37f196ae9257180abb (patch) | |
| tree | f90c349a10cb7ca6c1c2da5d141324c636817d33 /fs/ceph | |
| parent | 8d63e318c4eb1bea6f7e3cb4b77849eaa167bfec (diff) | |
| download | linux-3489b42a72a41d477665ab37f196ae9257180abb.tar.gz linux-3489b42a72a41d477665ab37f196ae9257180abb.tar.bz2 linux-3489b42a72a41d477665ab37f196ae9257180abb.zip | |
ceph: fix three bugs, two in ceph_vxattrcb_file_layout()
In ceph_vxattrcb_file_layout(), there is a check to determine
whether a preferred PG should be formatted into the output buffer.
That check assumes that a preferred PG number of 0 indicates "no
preference," but that is wrong. No preference is indicated by a
negative (specifically, -1) PG number.
In addition, if that condition yields true, the preferred value
is formatted into a sized buffer, but the size consumed by the
earlier snprintf() call is not accounted for, opening up the
possibilty of a buffer overrun.
Finally, in ceph_vxattrcb_dir_rctime() where the nanoseconds part of
the time displayed did not include leading 0's, which led to
erroneous (sub-second portion of) time values being shown.
This fixes these three issues:
http://tracker.newdream.net/issues/2155
http://tracker.newdream.net/issues/2156
http://tracker.newdream.net/issues/2157
Signed-off-by: Alex Elder <elder@dreamhost.com>
Reviewed-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/xattr.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index 8294f461ecd1..35b86331d8a5 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -79,7 +79,7 @@ static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, size_t size) { - return snprintf(val, size, "%ld.%ld", (long)ci->i_rctime.tv_sec, + return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, (long)ci->i_rctime.tv_nsec); } @@ -118,10 +118,15 @@ static size_t ceph_vxattrcb_file_layout(struct ceph_inode_info *ci, char *val, (unsigned long long)ceph_file_layout_su(ci->i_layout), (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); - if (ceph_file_layout_pg_preferred(ci->i_layout)) - ret += snprintf(val + ret, size, "preferred_osd=%lld\n", + + if (ceph_file_layout_pg_preferred(ci->i_layout) >= 0) { + val += ret; + size -= ret; + ret += snprintf(val, size, "preferred_osd=%lld\n", (unsigned long long)ceph_file_layout_pg_preferred( ci->i_layout)); + } + return ret; } |