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| author | Yan, Zheng <zyan@redhat.com> | 2017-01-29 22:15:47 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-02-20 12:16:07 +0100 |
| commit | c1944fedd8c492ce1c1a99ca9064dcc7bafa80e9 (patch) | |
| tree | 391d043097c793dacc36aae7c9c9e354d80553bb /fs/ceph/caps.c | |
| parent | 00f06cba53f53f3f7be8ac4f9ba2c2f6a94bca6f (diff) | |
| download | linux-c1944fedd8c492ce1c1a99ca9064dcc7bafa80e9.tar.gz linux-c1944fedd8c492ce1c1a99ca9064dcc7bafa80e9.tar.bz2 linux-c1944fedd8c492ce1c1a99ca9064dcc7bafa80e9.zip | |
ceph: avoid calling ceph_renew_caps() infinitely
__ceph_caps_mds_wanted() ignores caps from stale session. So the
return value of __ceph_caps_mds_wanted() can keep the same across
ceph_renew_caps(). This causes try_get_cap_refs() to keep calling
ceph_renew_caps(). The fix is ignore the session valid check for
the try_get_cap_refs() case. If session is stale, just let the
caps requester sleep.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph/caps.c')
| -rw-r--r-- | fs/ceph/caps.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index ed8c7addce91..3c2dfd72e5b2 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -867,7 +867,7 @@ int __ceph_caps_file_wanted(struct ceph_inode_info *ci) /* * Return caps we have registered with the MDS(s) as 'wanted'. */ -int __ceph_caps_mds_wanted(struct ceph_inode_info *ci) +int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check) { struct ceph_cap *cap; struct rb_node *p; @@ -875,7 +875,7 @@ int __ceph_caps_mds_wanted(struct ceph_inode_info *ci) for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { cap = rb_entry(p, struct ceph_cap, ci_node); - if (!__cap_is_valid(cap)) + if (check && !__cap_is_valid(cap)) continue; if (cap == ci->i_auth_cap) mds_wanted |= cap->mds_wanted; @@ -2491,7 +2491,7 @@ again: ret = 1; goto out_unlock; } - mds_wanted = __ceph_caps_mds_wanted(ci); + mds_wanted = __ceph_caps_mds_wanted(ci, false); if (need & ~(mds_wanted & need)) { dout("get_cap_refs %p caps were dropped" " (session killed?)\n", inode); |