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ceph: simplify add_cap_releases 

No functional change, aside from more useful debug output.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2010-06-10 12:57:11 -07:00
parent ee6b272b9c
commit 38e8883ee3
1 changed files with 19 additions and 16 deletions
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35
fs/ceph/mds_client.c
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@ -1069,11 +1069,14 @@ static int trim_caps(struct ceph_mds_client *mdsc,
int ceph_add_cap_releases(struct ceph_mds_client *mdsc,
struct ceph_mds_session *session)
{
struct ceph_msg *msg;
struct ceph_msg *msg, *partial = NULL;
struct ceph_mds_cap_release *head;
int err = -ENOMEM;
int extra = mdsc->client->mount_args->cap_release_safety;
int num;
dout("add_cap_releases %p mds%d extra %d\n", session, session->s_mds,
extra);
spin_lock(&session->s_cap_lock);
@ -1082,9 +1085,14 @@ int ceph_add_cap_releases(struct ceph_mds_client *mdsc,
struct ceph_msg,
list_head);
head = msg->front.iov_base;
extra += CEPH_CAPS_PER_RELEASE - le32_to_cpu(head->num);
num = le32_to_cpu(head->num);
if (num) {
dout(" partial %p with (%d/%d)\n", msg, num,
(int)CEPH_CAPS_PER_RELEASE);
extra += CEPH_CAPS_PER_RELEASE - num;
partial = msg;
}
}
while (session->s_num_cap_releases < session->s_nr_caps + extra) {
spin_unlock(&session->s_cap_lock);
msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPRELEASE, PAGE_CACHE_SIZE,
@ -1101,19 +1109,14 @@ int ceph_add_cap_releases(struct ceph_mds_client *mdsc,
session->s_num_cap_releases += CEPH_CAPS_PER_RELEASE;
}
if (!list_empty(&session->s_cap_releases)) {
msg = list_first_entry(&session->s_cap_releases,
struct ceph_msg,
list_head);
head = msg->front.iov_base;
if (head->num) {
dout(" queueing non-full %p (%d)\n", msg,
le32_to_cpu(head->num));
list_move_tail(&msg->list_head,
&session->s_cap_releases_done);
session->s_num_cap_releases -=
CEPH_CAPS_PER_RELEASE - le32_to_cpu(head->num);
}
if (partial) {
head = partial->front.iov_base;
num = le32_to_cpu(head->num);
dout(" queueing partial %p with %d/%d\n", partial, num,
(int)CEPH_CAPS_PER_RELEASE);
list_move_tail(&partial->list_head,
&session->s_cap_releases_done);
session->s_num_cap_releases -= CEPH_CAPS_PER_RELEASE - num;
}
err = 0;
spin_unlock(&session->s_cap_lock);