summaryrefslogtreecommitdiffstats
path: root/net/9p/client.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/9p/client.c')
-rw-r--r--net/9p/client.c157
1 files changed, 106 insertions, 51 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index a848bca9fbff..77367745be9b 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -178,7 +178,7 @@ free_and_return:
* @tag: numeric id for transaction
*
* this is a simple array lookup, but will grow the
- * request_slots as necessary to accomodate transaction
+ * request_slots as necessary to accommodate transaction
* ids which did not previously have a slot.
*
* this code relies on the client spinlock to manage locks, its
@@ -223,16 +223,29 @@ static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag)
req = &c->reqs[row][col];
if (!req->tc) {
- req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL);
+ req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS);
if (!req->wq) {
printk(KERN_ERR "Couldn't grow tag array\n");
return ERR_PTR(-ENOMEM);
}
init_waitqueue_head(req->wq);
- req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize,
- GFP_KERNEL);
- req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize,
- GFP_KERNEL);
+ if ((c->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) ==
+ P9_TRANS_PREF_PAYLOAD_SEP) {
+ int alloc_msize = min(c->msize, 4096);
+ req->tc = kmalloc(sizeof(struct p9_fcall)+alloc_msize,
+ GFP_NOFS);
+ req->tc->capacity = alloc_msize;
+ req->rc = kmalloc(sizeof(struct p9_fcall)+alloc_msize,
+ GFP_NOFS);
+ req->rc->capacity = alloc_msize;
+ } else {
+ req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize,
+ GFP_NOFS);
+ req->tc->capacity = c->msize;
+ req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize,
+ GFP_NOFS);
+ req->rc->capacity = c->msize;
+ }
if ((!req->tc) || (!req->rc)) {
printk(KERN_ERR "Couldn't grow tag array\n");
kfree(req->tc);
@@ -243,9 +256,7 @@ static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag)
return ERR_PTR(-ENOMEM);
}
req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall);
- req->tc->capacity = c->msize;
req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall);
- req->rc->capacity = c->msize;
}
p9pdu_reset(req->tc);
@@ -443,6 +454,7 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
{
int8_t type;
int err;
+ int ecode;
err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
if (err) {
@@ -450,36 +462,53 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
return err;
}
- if (type == P9_RERROR || type == P9_RLERROR) {
- int ecode;
-
- if (!p9_is_proto_dotl(c)) {
- char *ename;
-
- err = p9pdu_readf(req->rc, c->proto_version, "s?d",
- &ename, &ecode);
- if (err)
- goto out_err;
+ if (type != P9_RERROR && type != P9_RLERROR)
+ return 0;
- if (p9_is_proto_dotu(c))
- err = -ecode;
+ if (!p9_is_proto_dotl(c)) {
+ char *ename;
+
+ if (req->tc->pbuf_size) {
+ /* Handle user buffers */
+ size_t len = req->rc->size - req->rc->offset;
+ if (req->tc->pubuf) {
+ /* User Buffer */
+ err = copy_from_user(
+ &req->rc->sdata[req->rc->offset],
+ req->tc->pubuf, len);
+ if (err) {
+ err = -EFAULT;
+ goto out_err;
+ }
+ } else {
+ /* Kernel Buffer */
+ memmove(&req->rc->sdata[req->rc->offset],
+ req->tc->pkbuf, len);
+ }
+ }
+ err = p9pdu_readf(req->rc, c->proto_version, "s?d",
+ &ename, &ecode);
+ if (err)
+ goto out_err;
- if (!err || !IS_ERR_VALUE(err)) {
- err = p9_errstr2errno(ename, strlen(ename));
+ if (p9_is_proto_dotu(c))
+ err = -ecode;
- P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename);
+ if (!err || !IS_ERR_VALUE(err)) {
+ err = p9_errstr2errno(ename, strlen(ename));
- kfree(ename);
- }
- } else {
- err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);
- err = -ecode;
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode,
+ ename);
- P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);
+ kfree(ename);
}
+ } else {
+ err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);
+ err = -ecode;
+
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);
+ }
- } else
- err = 0;
return err;
@@ -900,15 +929,15 @@ error:
}
EXPORT_SYMBOL(p9_client_attach);
-struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
- int clone)
+struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname,
+ char **wnames, int clone)
{
int err;
struct p9_client *clnt;
struct p9_fid *fid;
struct p9_qid *wqids;
struct p9_req_t *req;
- int16_t nwqids, count;
+ uint16_t nwqids, count;
err = 0;
wqids = NULL;
@@ -926,7 +955,7 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
fid = oldfid;
- P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n",
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n",
oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL);
req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid,
@@ -1270,7 +1299,15 @@ p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
if (count < rsize)
rsize = count;
- req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize);
+ /* Don't bother zerocopy form small IO (< 1024) */
+ if (((clnt->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) ==
+ P9_TRANS_PREF_PAYLOAD_SEP) && (rsize > 1024)) {
+ req = p9_client_rpc(clnt, P9_TREAD, "dqE", fid->fid, offset,
+ rsize, data, udata);
+ } else {
+ req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset,
+ rsize);
+ }
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto error;
@@ -1284,13 +1321,15 @@ p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
- if (data) {
- memmove(data, dataptr, count);
- } else {
- err = copy_to_user(udata, dataptr, count);
- if (err) {
- err = -EFAULT;
- goto free_and_error;
+ if (!req->tc->pbuf_size) {
+ if (data) {
+ memmove(data, dataptr, count);
+ } else {
+ err = copy_to_user(udata, dataptr, count);
+ if (err) {
+ err = -EFAULT;
+ goto free_and_error;
+ }
}
}
p9_free_req(clnt, req);
@@ -1323,12 +1362,21 @@ p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
if (count < rsize)
rsize = count;
- if (data)
- req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset,
- rsize, data);
- else
- req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset,
- rsize, udata);
+
+ /* Don't bother zerocopy form small IO (< 1024) */
+ if (((clnt->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) ==
+ P9_TRANS_PREF_PAYLOAD_SEP) && (rsize > 1024)) {
+ req = p9_client_rpc(clnt, P9_TWRITE, "dqE", fid->fid, offset,
+ rsize, data, udata);
+ } else {
+
+ if (data)
+ req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid,
+ offset, rsize, data);
+ else
+ req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid,
+ offset, rsize, udata);
+ }
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto error;
@@ -1716,7 +1764,14 @@ int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
if (count < rsize)
rsize = count;
- req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize);
+ if ((clnt->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) ==
+ P9_TRANS_PREF_PAYLOAD_SEP) {
+ req = p9_client_rpc(clnt, P9_TREADDIR, "dqF", fid->fid,
+ offset, rsize, data);
+ } else {
+ req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid,
+ offset, rsize);
+ }
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto error;
@@ -1730,7 +1785,7 @@ int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count);
- if (data)
+ if (!req->tc->pbuf_size && data)
memmove(data, dataptr, count);
p9_free_req(clnt, req);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 16:19:01 +0000