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ceph: fix trim caps 

- don't trim auth cap if there are flusing caps
- don't trim auth cap if any 'write' cap is wanted
- allow trimming non-auth cap even if the inode is dirty

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
This commit is contained in:
Yan, Zheng 2013-11-22 13:56:24 +08:00
parent 9563f88c1f
commit 979abfdd5c
1 changed files with 11 additions and 6 deletions
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17
fs/ceph/mds_client.c
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@ -1214,7 +1214,7 @@ static int trim_caps_cb(struct inode *inode, struct ceph_cap *cap, void *arg)
{
struct ceph_mds_session *session = arg;
struct ceph_inode_info *ci = ceph_inode(inode);
int used, oissued, mine;
int used, wanted, oissued, mine;
if (session->s_trim_caps <= 0)
return -1;
@ -1222,14 +1222,19 @@ static int trim_caps_cb(struct inode *inode, struct ceph_cap *cap, void *arg)
spin_lock(&ci->i_ceph_lock);
mine = cap->issued | cap->implemented;
used = __ceph_caps_used(ci);
wanted = __ceph_caps_file_wanted(ci);
oissued = __ceph_caps_issued_other(ci, cap);
dout("trim_caps_cb %p cap %p mine %s oissued %s used %s\n",
dout("trim_caps_cb %p cap %p mine %s oissued %s used %s wanted %s\n",
inode, cap, ceph_cap_string(mine), ceph_cap_string(oissued),
ceph_cap_string(used));
if (ci->i_dirty_caps)
goto out; /* dirty caps */
if ((used & ~oissued) & mine)
ceph_cap_string(used), ceph_cap_string(wanted));
if (cap == ci->i_auth_cap) {
if (ci->i_dirty_caps | ci->i_flushing_caps)
goto out;
if ((used | wanted) & CEPH_CAP_ANY_WR)
goto out;
}
if ((used | wanted) & ~oissued & mine)
goto out; /* we need these caps */
session->s_trim_caps--;