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ceph: add cpu_to_le32() calls when encoding a reconnect capability 

In his review, Alex Elder mentioned that he hadn't checked that
num_fcntl_locks and num_flock_locks were properly decoded on the
server side, from a le32 over-the-wire type to a cpu type.
I checked, and AFAICS it is done; those interested can consult
    Locker::_do_cap_update()
in src/mds/Locker.cc and src/include/encoding.h in the Ceph server
code (git://github.com/ceph/ceph).

I also checked the server side for flock_len decoding, and I believe
that also happens correctly, by virtue of having been declared
__le32 in struct ceph_mds_cap_reconnect, in src/include/ceph_fs.h.

Cc: stable@vger.kernel.org # 3.4+
Signed-off-by: Jim Schutt <jaschut@sandia.gov>
Reviewed-by: Alex Elder <elder@inktank.com>
This commit is contained in:
Jim Schutt 2013-05-15 13:03:35 -05:00 committed by Alex Elder
parent 14d2f38df6
commit c420276a53
2 changed files with 6 additions and 3 deletions
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7
fs/ceph/locks.c
View File

@ -206,10 +206,12 @@ int ceph_encode_locks(struct inode *inode, struct ceph_pagelist *pagelist,
int err = 0;
int seen_fcntl = 0;
int seen_flock = 0;
__le32 nlocks;
dout("encoding %d flock and %d fcntl locks", num_flock_locks,
num_fcntl_locks);
err = ceph_pagelist_append(pagelist, &num_fcntl_locks, sizeof(u32));
nlocks = cpu_to_le32(num_fcntl_locks);
err = ceph_pagelist_append(pagelist, &nlocks, sizeof(nlocks));
if (err)
goto fail;
for (lock = inode->i_flock; lock != NULL; lock = lock->fl_next) {
@ -229,7 +231,8 @@ int ceph_encode_locks(struct inode *inode, struct ceph_pagelist *pagelist,
goto fail;
}
err = ceph_pagelist_append(pagelist, &num_flock_locks, sizeof(u32));
nlocks = cpu_to_le32(num_flock_locks);
err = ceph_pagelist_append(pagelist, &nlocks, sizeof(nlocks));
if (err)
goto fail;
for (lock = inode->i_flock; lock != NULL; lock = lock->fl_next) {

2
fs/ceph/mds_client.c
View File

@ -2485,7 +2485,7 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
lock_flocks();
ceph_count_locks(inode, &num_fcntl_locks,
&num_flock_locks);
rec.v2.flock_len = (2*sizeof(u32) +
rec.v2.flock_len = cpu_to_le32(2*sizeof(u32) +
(num_fcntl_locks+num_flock_locks) *
sizeof(struct ceph_filelock));
unlock_flocks();