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ceph: update wanted caps after resuming stale session
mds contains an optimization, it does not re-issue stale caps if client does not want any cap. A special case of the optimization is that client wants some caps, but skipped updating 'wanted'. For this case, client needs to update 'wanted' when stale session get renewed. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng
Ilya Dryomov
parent
fdac94fab7
commit
d2f8bb27c8
@ -657,6 +657,9 @@ void ceph_add_cap(struct inode *inode,
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session->s_nr_caps++;
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spin_unlock(&session->s_cap_lock);
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} else {
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if (cap->cap_gen < session->s_cap_gen)
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cap->issued = cap->implemented = CEPH_CAP_PIN;
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/*
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* auth mds of the inode changed. we received the cap export
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* message, but still haven't received the cap import message.
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@ -3065,21 +3068,6 @@ static void handle_cap_grant(struct inode *inode,
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inode->i_size);
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/*
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* auth mds of the inode changed. we received the cap export message,
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* but still haven't received the cap import message. handle_cap_export
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* updated the new auth MDS' cap.
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*
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* "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message
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* that was sent before the cap import message. So don't remove caps.
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*/
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if (ceph_seq_cmp(seq, cap->seq) <= 0) {
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WARN_ON(cap != ci->i_auth_cap);
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WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id));
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seq = cap->seq;
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newcaps |= cap->issued;
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}
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/*
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* If CACHE is being revoked, and we have no dirty buffers,
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* try to invalidate (once). (If there are dirty buffers, we
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@ -3099,6 +3087,24 @@ static void handle_cap_grant(struct inode *inode,
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}
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}
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if (was_stale)
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cap->issued = cap->implemented = CEPH_CAP_PIN;
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/*
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* auth mds of the inode changed. we received the cap export message,
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* but still haven't received the cap import message. handle_cap_export
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* updated the new auth MDS' cap.
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*
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* "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message
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* that was sent before the cap import message. So don't remove caps.
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*/
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if (ceph_seq_cmp(seq, cap->seq) <= 0) {
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WARN_ON(cap != ci->i_auth_cap);
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WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id));
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seq = cap->seq;
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newcaps |= cap->issued;
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}
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/* side effects now are allowed */
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cap->cap_gen = session->s_cap_gen;
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cap->seq = seq;
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@ -3549,9 +3555,9 @@ retry:
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goto out_unlock;
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if (target < 0) {
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__ceph_remove_cap(cap, false);
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if (!ci->i_auth_cap)
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if (cap->mds_wanted | cap->issued)
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ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
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__ceph_remove_cap(cap, false);
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goto out_unlock;
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}
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@ -1232,13 +1232,13 @@ static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap,
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dout("removing cap %p, ci is %p, inode is %p\n",
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cap, ci, &ci->vfs_inode);
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spin_lock(&ci->i_ceph_lock);
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if (cap->mds_wanted | cap->issued)
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ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
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__ceph_remove_cap(cap, false);
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if (!ci->i_auth_cap) {
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struct ceph_cap_flush *cf;
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struct ceph_mds_client *mdsc = fsc->mdsc;
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ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
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if (ci->i_wrbuffer_ref > 0 &&
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READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN)
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invalidate = true;
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@ -1355,6 +1355,12 @@ static void remove_session_caps(struct ceph_mds_session *session)
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dispose_cap_releases(session->s_mdsc, &dispose);
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}
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enum {
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RECONNECT,
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RENEWCAPS,
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FORCE_RO,
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};
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/*
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* wake up any threads waiting on this session's caps. if the cap is
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* old (didn't get renewed on the client reconnect), remove it now.
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@ -1365,23 +1371,34 @@ static int wake_up_session_cb(struct inode *inode, struct ceph_cap *cap,
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void *arg)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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unsigned long ev = (unsigned long)arg;
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if (arg) {
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if (ev == RECONNECT) {
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spin_lock(&ci->i_ceph_lock);
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ci->i_wanted_max_size = 0;
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ci->i_requested_max_size = 0;
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spin_unlock(&ci->i_ceph_lock);
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} else if (ev == RENEWCAPS) {
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if (cap->cap_gen < cap->session->s_cap_gen) {
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/* mds did not re-issue stale cap */
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spin_lock(&ci->i_ceph_lock);
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cap->issued = cap->implemented = CEPH_CAP_PIN;
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/* make sure mds knows what we want */
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if (__ceph_caps_file_wanted(ci) & ~cap->mds_wanted)
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ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
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spin_unlock(&ci->i_ceph_lock);
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}
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} else if (ev == FORCE_RO) {
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}
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wake_up_all(&ci->i_cap_wq);
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return 0;
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}
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static void wake_up_session_caps(struct ceph_mds_session *session,
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int reconnect)
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static void wake_up_session_caps(struct ceph_mds_session *session, int ev)
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{
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dout("wake_up_session_caps %p mds%d\n", session, session->s_mds);
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iterate_session_caps(session, wake_up_session_cb,
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(void *)(unsigned long)reconnect);
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(void *)(unsigned long)ev);
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}
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/*
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@ -1466,7 +1483,7 @@ static void renewed_caps(struct ceph_mds_client *mdsc,
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spin_unlock(&session->s_cap_lock);
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if (wake)
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wake_up_session_caps(session, 0);
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wake_up_session_caps(session, RENEWCAPS);
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}
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/*
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@ -2847,7 +2864,7 @@ static void handle_session(struct ceph_mds_session *session,
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spin_lock(&session->s_cap_lock);
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session->s_readonly = true;
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spin_unlock(&session->s_cap_lock);
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wake_up_session_caps(session, 0);
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wake_up_session_caps(session, FORCE_RO);
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break;
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case CEPH_SESSION_REJECT:
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@ -3339,7 +3356,7 @@ static void check_new_map(struct ceph_mds_client *mdsc,
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pr_info("mds%d recovery completed\n", s->s_mds);
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kick_requests(mdsc, i);
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ceph_kick_flushing_caps(mdsc, s);
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wake_up_session_caps(s, 1);
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wake_up_session_caps(s, RECONNECT);
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}
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}
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@ -17,14 +17,16 @@
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#include <linux/ceph/auth.h>
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/* The first 8 bits are reserved for old ceph releases */
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#define CEPHFS_FEATURE_MIMIC 8
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#define CEPHFS_FEATURE_MIMIC 8
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#define CEPHFS_FEATURE_REPLY_ENCODING 9
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#define CEPHFS_FEATURE_RECLAIM_CLIENT 10
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#define CEPHFS_FEATURE_LAZY_CAP_WANTED 11
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#define CEPHFS_FEATURES_ALL { \
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0, 1, 2, 3, 4, 5, 6, 7, \
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CEPHFS_FEATURE_MIMIC, \
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#define CEPHFS_FEATURES_CLIENT_SUPPORTED { \
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0, 1, 2, 3, 4, 5, 6, 7, \
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CEPHFS_FEATURE_MIMIC, \
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CEPHFS_FEATURE_LAZY_CAP_WANTED, \
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}
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#define CEPHFS_FEATURES_CLIENT_SUPPORTED CEPHFS_FEATURES_ALL
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#define CEPHFS_FEATURES_CLIENT_REQUIRED {}
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