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net/9p: split message size argument into 't_size' and 'r_size' pair

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Refactor 'max_size' argument of p9_tag_alloc() and 'req_size' argument
of p9_client_prepare_req() both into a pair of arguments 't_size' and
'r_size' respectively to allow handling the buffer size for request and
reply separately from each other.

Link: https://lkml.kernel.org/r/9431a25fe4b37fd12cecbd715c13af71f701f220.1657920926.git.linux_oss@crudebyte.com
Signed-off-by: Christian Schoenebeck <linux_oss@crudebyte.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
This commit is contained in:
Christian Schoenebeck 2022-07-15 23:32:28 +02:00 committed by Dominique Martinet
parent 52f1c45dde
commit e7c6219778
1 changed files with 11 additions and 9 deletions
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20
net/9p/client.c
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@ -255,24 +255,26 @@ static struct kmem_cache *p9_req_cache;
* p9_tag_alloc - Allocate a new request.
* @c: Client session.
* @type: Transaction type.
* @max_size: Maximum packet size for this request.
* @t_size: Buffer size for holding this request.
* @r_size: Buffer size for holding server's reply on this request.
*
* Context: Process context.
* Return: Pointer to new request.
*/
static struct p9_req_t *
p9_tag_alloc(struct p9_client *c, int8_t type, unsigned int max_size)
p9_tag_alloc(struct p9_client *c, int8_t type, uint t_size, uint r_size)
{
struct p9_req_t *req = kmem_cache_alloc(p9_req_cache, GFP_NOFS);
int alloc_msize = min(c->msize, max_size);
int alloc_tsize = min(c->msize, t_size);
int alloc_rsize = min(c->msize, r_size);
int tag;
if (!req)
return ERR_PTR(-ENOMEM);
if (p9_fcall_init(c, &req->tc, alloc_msize))
if (p9_fcall_init(c, &req->tc, alloc_tsize))
goto free_req;
if (p9_fcall_init(c, &req->rc, alloc_msize))
if (p9_fcall_init(c, &req->rc, alloc_rsize))
goto free;
p9pdu_reset(&req->tc);
@ -592,7 +594,7 @@ static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
}
static struct p9_req_t *p9_client_prepare_req(struct p9_client *c,
int8_t type, int req_size,
int8_t type, uint t_size, uint r_size,
const char *fmt, va_list ap)
{
int err;
@ -608,7 +610,7 @@ static struct p9_req_t *p9_client_prepare_req(struct p9_client *c,
if (c->status == BeginDisconnect && type != P9_TCLUNK)
return ERR_PTR(-EIO);
req = p9_tag_alloc(c, type, req_size);
req = p9_tag_alloc(c, type, t_size, r_size);
if (IS_ERR(req))
return req;
@ -645,7 +647,7 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
struct p9_req_t *req;
va_start(ap, fmt);
req = p9_client_prepare_req(c, type, c->msize, fmt, ap);
req = p9_client_prepare_req(c, type, c->msize, c->msize, fmt, ap);
va_end(ap);
if (IS_ERR(req))
return req;
@ -743,7 +745,7 @@ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type,
/* We allocate a inline protocol data of only 4k bytes.
* The actual content is passed in zero-copy fashion.
*/
req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap);
req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, P9_ZC_HDR_SZ, fmt, ap);
va_end(ap);
if (IS_ERR(req))
return req;