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| author | Yan, Zheng <zheng.z.yan@intel.com> | 2013-06-03 18:22:17 +0800 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2013-07-03 15:32:46 -0700 |
| commit | bb137f84d1d8f692233b590f7cae14abbdc1e0c1 (patch) | |
| tree | 393f01adbf4b55b590f8831b5a7aa3ab96ccbf06 /fs/ceph | |
| parent | ccca4e37b1a912da3db68aee826557ea66145273 (diff) | |
| download | linux-bb137f84d1d8f692233b590f7cae14abbdc1e0c1.tar.gz linux-bb137f84d1d8f692233b590f7cae14abbdc1e0c1.tar.bz2 linux-bb137f84d1d8f692233b590f7cae14abbdc1e0c1.zip | |
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>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/caps.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index da0f9b8a3bcb..54c290b083ab 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -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, |