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9p: apply common tagpool handling to trans_fd 

Simplify trans_fd by using new common client tagpool structure.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Eric Van Hensbergen 2008-10-13 18:45:22 -05:00
parent fea511a644
commit ff683452f7
1 changed files with 10 additions and 34 deletions
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44
net/9p/trans_fd.c
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@ -142,7 +142,6 @@ struct p9_poll_wait {
* @lock: protects mux_list (?)
* @mux_list: list link for mux to manage multiple connections (?)
* @client: reference to client instance for this connection
* @tagpool: id accounting for transactions
* @err: error state
* @req_list: accounting for requests which have been sent
* @unsent_req_list: accounting for requests that haven't been sent
@ -165,7 +164,6 @@ struct p9_conn {
spinlock_t lock; /* protect lock structure */
struct list_head mux_list;
struct p9_client *client;
struct p9_idpool *tagpool;
int err;
struct list_head req_list;
struct list_head unsent_req_list;
@ -188,23 +186,6 @@ static LIST_HEAD(p9_poll_pending_list);
static struct workqueue_struct *p9_mux_wq;
static struct task_struct *p9_poll_task;
static u16 p9_mux_get_tag(struct p9_conn *m)
{
int tag;
tag = p9_idpool_get(m->tagpool);
if (tag < 0)
return P9_NOTAG;
else
return (u16) tag;
}
static void p9_mux_put_tag(struct p9_conn *m, u16 tag)
{
if (tag != P9_NOTAG && p9_idpool_check(tag, m->tagpool))
p9_idpool_put(tag, m->tagpool);
}
static void p9_mux_poll_stop(struct p9_conn *m)
{
unsigned long flags;
@ -226,7 +207,9 @@ static void p9_mux_poll_stop(struct p9_conn *m)
static void p9_mux_free_request(struct p9_conn *m, struct p9_req *req)
{
p9_mux_put_tag(m, req->tag);
if (req->tag != P9_NOTAG &&
p9_idpool_check(req->tag, m->client->tagpool))
p9_idpool_put(req->tag, m->client->tagpool);
kfree(req);
}
@ -745,11 +728,6 @@ static struct p9_conn *p9_conn_create(struct p9_client *client)
spin_lock_init(&m->lock);
INIT_LIST_HEAD(&m->mux_list);
m->client = client;
m->tagpool = p9_idpool_create();
if (IS_ERR(m->tagpool)) {
kfree(m);
return ERR_PTR(-ENOMEM);
}
INIT_LIST_HEAD(&m->req_list);
INIT_LIST_HEAD(&m->unsent_req_list);
@ -848,14 +826,13 @@ static struct p9_req *p9_send_request(struct p9_conn *m, struct p9_fcall *tc)
if (!req)
return ERR_PTR(-ENOMEM);
if (tc->id == P9_TVERSION)
n = P9_NOTAG;
else
n = p9_mux_get_tag(m);
if (n < 0) {
kfree(req);
return ERR_PTR(-ENOMEM);
n = P9_NOTAG;
if (tc->id != P9_TVERSION) {
n = p9_idpool_get(m->client->tagpool);
if (n < 0) {
kfree(req);
return ERR_PTR(-ENOMEM);
}
}
p9_set_tag(tc, n);
@ -1134,7 +1111,6 @@ static void p9_conn_destroy(struct p9_conn *m)
p9_conn_cancel(m, -ECONNRESET);
m->client = NULL;
p9_idpool_destroy(m->tagpool);
kfree(m);
}