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ceph: fix cap release race 

ceph_encode_inode_release() can race with ceph_open() and release
caps wanted by open files. So it should call __ceph_caps_wanted()
to get the wanted caps.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Yan, Zheng 2013-06-03 18:22:17 +08:00 committed by Sage Weil
parent ccca4e37b1
commit bb137f84d1
1 changed files with 10 additions and 12 deletions
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22
fs/ceph/caps.c
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@ -3042,21 +3042,19 @@ int ceph_encode_inode_release(void **p, struct inode *inode,
(cap->issued & unless) == 0)) {
if ((cap->issued & drop) &&
(cap->issued & unless) == 0) {
dout("encode_inode_release %p cap %p %s -> "
"%s\n", inode, cap,
int wanted = __ceph_caps_wanted(ci);
if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0)
wanted |= cap->mds_wanted;
dout("encode_inode_release %p cap %p "
"%s -> %s, wanted %s -> %s\n", inode, cap,
ceph_cap_string(cap->issued),
ceph_cap_string(cap->issued & ~drop));
ceph_cap_string(cap->issued & ~drop),
ceph_cap_string(cap->mds_wanted),
ceph_cap_string(wanted));
cap->issued &= ~drop;
cap->implemented &= ~drop;
if (ci->i_ceph_flags & CEPH_I_NODELAY) {
int wanted = __ceph_caps_wanted(ci);
dout(" wanted %s -> %s (act %s)\n",
ceph_cap_string(cap->mds_wanted),
ceph_cap_string(cap->mds_wanted &
~wanted),
ceph_cap_string(wanted));
cap->mds_wanted &= wanted;
}
cap->mds_wanted = wanted;
} else {
dout("encode_inode_release %p cap %p %s"
" (force)\n", inode, cap,