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ceph: break up send_cap_msg

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Push the allocation of the msg and the send into the caller. Rename
the function to encode_cap_msg and make it void return.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Jeff Layton 2020-03-30 07:20:27 -04:00 committed by Ilya Dryomov
parent 5231198089
commit 16d68903f5
1 changed files with 28 additions and 32 deletions
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60
fs/ceph/caps.c
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@ -1222,36 +1222,27 @@ struct cap_msg_args {
};
/*
* Build and send a cap message to the given MDS.
*
* Caller should be holding s_mutex.
* cap struct size + flock buffer size + inline version + inline data size +
* osd_epoch_barrier + oldest_flush_tid
*/
static int send_cap_msg(struct cap_msg_args *arg)
#define CAP_MSG_SIZE (sizeof(struct ceph_mds_caps) + \
4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4)
/* Marshal up the cap msg to the MDS */
static void encode_cap_msg(struct ceph_msg *msg, struct cap_msg_args *arg)
{
struct ceph_mds_caps *fc;
struct ceph_msg *msg;
void *p;
size_t extra_len;
struct ceph_osd_client *osdc = &arg->session->s_mdsc->fsc->client->osdc;
dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s"
" seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu"
" xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(arg->op),
arg->cid, arg->ino, ceph_cap_string(arg->caps),
ceph_cap_string(arg->wanted), ceph_cap_string(arg->dirty),
arg->seq, arg->issue_seq, arg->flush_tid, arg->oldest_flush_tid,
arg->mseq, arg->follows, arg->size, arg->max_size,
arg->xattr_version,
dout("%s %s %llx %llx caps %s wanted %s dirty %s seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu xattr_ver %llu xattr_len %d\n",
__func__, ceph_cap_op_name(arg->op), arg->cid, arg->ino,
ceph_cap_string(arg->caps), ceph_cap_string(arg->wanted),
ceph_cap_string(arg->dirty), arg->seq, arg->issue_seq,
arg->flush_tid, arg->oldest_flush_tid, arg->mseq, arg->follows,
arg->size, arg->max_size, arg->xattr_version,
arg->xattr_buf ? (int)arg->xattr_buf->vec.iov_len : 0);
/* flock buffer size + inline version + inline data size +
* osd_epoch_barrier + oldest_flush_tid */
extra_len = 4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4;
msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, sizeof(*fc) + extra_len,
GFP_NOFS, false);
if (!msg)
return -ENOMEM;
msg->hdr.version = cpu_to_le16(10);
msg->hdr.tid = cpu_to_le64(arg->flush_tid);
@ -1323,9 +1314,6 @@ static int send_cap_msg(struct cap_msg_args *arg)
/* Advisory flags (version 10) */
ceph_encode_32(&p, arg->flags);
ceph_con_send(&arg->session->s_con, msg);
return 0;
}
/*
@ -1456,22 +1444,23 @@ static void __prep_cap(struct cap_msg_args *arg, struct ceph_cap *cap,
*/
static void __send_cap(struct cap_msg_args *arg, struct ceph_inode_info *ci)
{
struct ceph_msg *msg;
struct inode *inode = &ci->vfs_inode;
int ret;
ret = send_cap_msg(arg);
if (ret < 0) {
pr_err("error sending cap msg, ino (%llx.%llx) "
"flushing %s tid %llu, requeue\n",
msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, CAP_MSG_SIZE, GFP_NOFS, false);
if (!msg) {
pr_err("error allocating cap msg: ino (%llx.%llx) flushing %s tid %llu, requeuing cap.\n",
ceph_vinop(inode), ceph_cap_string(arg->dirty),
arg->flush_tid);
spin_lock(&ci->i_ceph_lock);
__cap_delay_requeue(arg->session->s_mdsc, ci);
spin_unlock(&ci->i_ceph_lock);
return;
}
encode_cap_msg(msg, arg);
ceph_con_send(&arg->session->s_con, msg);
ceph_buffer_put(arg->old_xattr_buf);
if (arg->wake)
wake_up_all(&ci->i_cap_wq);
}
@ -1482,6 +1471,11 @@ static inline int __send_flush_snap(struct inode *inode,
u32 mseq, u64 oldest_flush_tid)
{
struct cap_msg_args arg;
struct ceph_msg *msg;
msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, CAP_MSG_SIZE, GFP_NOFS, false);
if (!msg)
return -ENOMEM;
arg.session = session;
arg.ino = ceph_vino(inode).ino;
@ -1520,7 +1514,9 @@ static inline int __send_flush_snap(struct inode *inode,
arg.flags = 0;
arg.wake = false;
return send_cap_msg(&arg);
encode_cap_msg(msg, &arg);
ceph_con_send(&arg.session->s_con, msg);
return 0;
}
/*