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ceph: make ceph_msg_new return NULL on failure; clean up, fix callers

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Returning ERR_PTR(-ENOMEM) is useless extra work.  Return NULL on failure
instead, and fix up the callers (about half of which were wrong anyway).

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil
2010-04-01 16:06:19 -07:00
parent d52f847a84
commit a79832f26b
7 changed files with 48 additions and 80 deletions
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40
fs/ceph/mds_client.c
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@@ -666,9 +666,9 @@ static struct ceph_msg *create_session_msg(u32 op, u64 seq)
struct ceph_mds_session_head *h;
msg = ceph_msg_new(CEPH_MSG_CLIENT_SESSION, sizeof(*h), 0, 0, NULL);
if (IS_ERR(msg)) {
if (!msg) {
pr_err("create_session_msg ENOMEM creating msg\n");
return ERR_PTR(PTR_ERR(msg));
return NULL;
}
h = msg->front.iov_base;
h->op = cpu_to_le32(op);
@@ -687,7 +687,6 @@ static int __open_session(struct ceph_mds_client *mdsc,
struct ceph_msg *msg;
int mstate;
int mds = session->s_mds;
int err = 0;
/* wait for mds to go active? */
mstate = ceph_mdsmap_get_state(mdsc->mdsmap, mds);
@@ -698,13 +697,9 @@ static int __open_session(struct ceph_mds_client *mdsc,
/* send connect message */
msg = create_session_msg(CEPH_SESSION_REQUEST_OPEN, session->s_seq);
if (IS_ERR(msg)) {
err = PTR_ERR(msg);
goto out;
}
if (!msg)
return -ENOMEM;
ceph_con_send(&session->s_con, msg);
out:
return 0;
}
@@ -883,8 +878,8 @@ static int send_renew_caps(struct ceph_mds_client *mdsc,
ceph_mds_state_name(state));
msg = create_session_msg(CEPH_SESSION_REQUEST_RENEWCAPS,
++session->s_renew_seq);
if (IS_ERR(msg))
return PTR_ERR(msg);
if (!msg)
return -ENOMEM;
ceph_con_send(&session->s_con, msg);
return 0;
}
@@ -931,17 +926,15 @@ static int request_close_session(struct ceph_mds_client *mdsc,
struct ceph_mds_session *session)
{
struct ceph_msg *msg;
int err = 0;
dout("request_close_session mds%d state %s seq %lld\n",
session->s_mds, session_state_name(session->s_state),
session->s_seq);
msg = create_session_msg(CEPH_SESSION_REQUEST_CLOSE, session->s_seq);
if (IS_ERR(msg))
err = PTR_ERR(msg);
else
ceph_con_send(&session->s_con, msg);
return err;
if (!msg)
return -ENOMEM;
ceph_con_send(&session->s_con, msg);
return 0;
}
/*
@@ -1426,8 +1419,10 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
len += req->r_old_dentry->d_name.len;
msg = ceph_msg_new(CEPH_MSG_CLIENT_REQUEST, len, 0, 0, NULL);
if (IS_ERR(msg))
if (!msg) {
msg = ERR_PTR(-ENOMEM);
goto out_free2;
}
msg->hdr.tid = cpu_to_le64(req->r_tid);
@@ -1518,7 +1513,7 @@ static int __prepare_send_request(struct ceph_mds_client *mdsc,
if (IS_ERR(msg)) {
req->r_err = PTR_ERR(msg);
complete_request(mdsc, req);
return -PTR_ERR(msg);
return PTR_ERR(msg);
}
req->r_request = msg;
@@ -2158,11 +2153,10 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc, int mds)
goto fail_nopagelist;
ceph_pagelist_init(pagelist);
err = -ENOMEM;
reply = ceph_msg_new(CEPH_MSG_CLIENT_RECONNECT, 0, 0, 0, NULL);
if (IS_ERR(reply)) {
err = PTR_ERR(reply);
if (!reply)
goto fail_nomsg;
}
/* find session */
session = __ceph_lookup_mds_session(mdsc, mds);
@@ -2469,7 +2463,7 @@ void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session,
len += dnamelen;
msg = ceph_msg_new(CEPH_MSG_CLIENT_LEASE, len, 0, 0, NULL);
if (IS_ERR(msg))
if (!msg)
return;
lease = msg->front.iov_base;
lease->action = action;