diff options
| author | Sage Weil <sage@newdream.net> | 2009-11-09 23:05:48 +0300 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2009-11-09 23:06:07 +0300 |
| commit | 685f9a5d14194fc35db73e5e7370740ccc14b64a (patch) | |
| tree | 4c34ac2348149d91ad5e08cd105207810f0afdc9 /fs/ceph/caps.c | |
| parent | fb690390e305ea51e1883b105c7d3c52d7100ba5 (diff) | |
| download | linux-685f9a5d14194fc35db73e5e7370740ccc14b64a.tar.xz | |
ceph: do not confuse stale and dead (unreconnected) caps
We were using the cap_gen to track both stale caps (caps that timed out
due to temporarily losing touch with the mds) and dead caps that did not
reconnect after an MDS failure. Introduce a recon_gen counter to track
reconnections to restarted MDSs and kill dead caps based on that instead.
Rename gen to cap_gen while we're at it to make it more clear which is
which.
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/caps.c')
| -rw-r--r-- | fs/ceph/caps.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 8b863dbec70c..775e6f6fc970 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -609,7 +609,8 @@ retry: cap->seq = seq; cap->issue_seq = seq; cap->mseq = mseq; - cap->gen = session->s_cap_gen; + cap->cap_gen = session->s_cap_gen; + cap->recon_gen = session->s_recon_gen; if (fmode >= 0) __ceph_get_fmode(ci, fmode); @@ -626,17 +627,25 @@ retry: static int __cap_is_valid(struct ceph_cap *cap) { unsigned long ttl; - u32 gen; + u32 gen, recon_gen; spin_lock(&cap->session->s_cap_lock); gen = cap->session->s_cap_gen; + recon_gen = cap->session->s_recon_gen; ttl = cap->session->s_cap_ttl; spin_unlock(&cap->session->s_cap_lock); - if (cap->gen < gen || time_after_eq(jiffies, ttl)) { + if (cap->recon_gen != recon_gen) { + dout("__cap_is_valid %p cap %p issued %s " + "but DEAD (recon_gen %u vs %u)\n", &cap->ci->vfs_inode, + cap, ceph_cap_string(cap->issued), cap->recon_gen, + recon_gen); + return 0; + } + if (cap->cap_gen < gen || time_after_eq(jiffies, ttl)) { dout("__cap_is_valid %p cap %p issued %s " "but STALE (gen %u vs %u)\n", &cap->ci->vfs_inode, - cap, ceph_cap_string(cap->issued), cap->gen, gen); + cap, ceph_cap_string(cap->issued), cap->cap_gen, gen); return 0; } @@ -2203,7 +2212,8 @@ restart: issued = __ceph_caps_issued(ci, &implemented); issued |= implemented | __ceph_caps_dirty(ci); - cap->gen = session->s_cap_gen; + cap->cap_gen = session->s_cap_gen; + cap->recon_gen = session->s_recon_gen; __check_cap_issue(ci, cap, newcaps); |