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-rw-r--r--net/9p/client.c931
-rw-r--r--net/9p/protocol.c85
-rw-r--r--net/9p/protocol.h5
-rw-r--r--net/9p/trans_fd.c62
-rw-r--r--net/9p/util.c4
5 files changed, 572 insertions, 515 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index 6004fde..2a166bf 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -35,6 +35,7 @@
#include <linux/parser.h>
#include <net/9p/client.h>
#include <net/9p/transport.h>
+#include "protocol.h"
/*
* Client Option Parsing (code inspired by NFS code)
@@ -55,8 +56,8 @@ static const match_table_t tokens = {
{Opt_err, NULL},
};
-static int
-p9_client_rpc(struct p9_client *c, struct p9_fcall *tc, struct p9_fcall **rc);
+static struct p9_req_t *
+p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...);
/**
* v9fs_parse_options - parse mount options into session structure
@@ -138,10 +139,11 @@ static int parse_opts(char *opts, struct p9_client *clnt)
*
*/
-struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag)
+static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag)
{
unsigned long flags;
int row, col;
+ struct p9_req_t *req;
/* This looks up the original request by tag so we know which
* buffer to read the data into */
@@ -157,19 +159,11 @@ struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag)
if (!c->reqs[row]) {
printk(KERN_ERR "Couldn't grow tag array\n");
- BUG();
+ return ERR_PTR(-ENOMEM);
}
for (col = 0; col < P9_ROW_MAXTAG; col++) {
c->reqs[row][col].status = REQ_STATUS_IDLE;
- c->reqs[row][col].flush_tag = P9_NOTAG;
- c->reqs[row][col].wq = kmalloc(
- sizeof(wait_queue_head_t), GFP_ATOMIC);
- if (!c->reqs[row][col].wq) {
- printk(KERN_ERR
- "Couldn't grow tag array\n");
- BUG();
- }
- init_waitqueue_head(c->reqs[row][col].wq);
+ c->reqs[row][col].tc = NULL;
}
c->max_tag += P9_ROW_MAXTAG;
}
@@ -178,12 +172,39 @@ struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag)
row = tag / P9_ROW_MAXTAG;
col = tag % P9_ROW_MAXTAG;
- c->reqs[row][col].status = REQ_STATUS_ALLOC;
- c->reqs[row][col].flush_tag = P9_NOTAG;
+ req = &c->reqs[row][col];
+ if (!req->tc) {
+ req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL);
+ 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 ((!req->tc) || (!req->rc)) {
+ printk(KERN_ERR "Couldn't grow tag array\n");
+ kfree(req->tc);
+ kfree(req->rc);
+ 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);
+ p9pdu_reset(req->rc);
+
+ req->flush_tag = 0;
+ req->tc->tag = tag-1;
+ req->status = REQ_STATUS_ALLOC;
return &c->reqs[row][col];
}
-EXPORT_SYMBOL(p9_tag_alloc);
/**
* p9_tag_lookup - lookup a request by tag
@@ -264,59 +285,34 @@ static void p9_tag_cleanup(struct p9_client *c)
/* free requests associated with tags */
for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
- for (col = 0; col < P9_ROW_MAXTAG; col++)
+ for (col = 0; col < P9_ROW_MAXTAG; col++) {
kfree(c->reqs[row][col].wq);
+ kfree(c->reqs[row][col].tc);
+ kfree(c->reqs[row][col].rc);
+ }
kfree(c->reqs[row]);
}
c->max_tag = 0;
}
/**
- * p9_client_flush - flush (cancel) a request
- * c: client state
- * req: request to cancel
- *
- * This sents a flush for a particular requests and links
- * the flush request to the original request. The current
- * code only supports a single flush request although the protocol
- * allows for multiple flush requests to be sent for a single request.
- *
- */
-
-static int p9_client_flush(struct p9_client *c, struct p9_req_t *req)
-{
- struct p9_fcall *tc, *rc = NULL;
- int err;
-
- P9_DPRINTK(P9_DEBUG_9P, "client %p tag %d\n", c, req->tc->tag);
-
- tc = p9_create_tflush(req->tc->tag);
- if (IS_ERR(tc))
- return PTR_ERR(tc);
-
- err = p9_client_rpc(c, tc, &rc);
-
- /* we don't free anything here because RPC isn't complete */
-
- return err;
-}
-
-/**
* p9_free_req - free a request and clean-up as necessary
* c: client state
* r: request to release
*
*/
-void p9_free_req(struct p9_client *c, struct p9_req_t *r)
+static void p9_free_req(struct p9_client *c, struct p9_req_t *r)
{
- r->flush_tag = P9_NOTAG;
+ int tag = r->tc->tag;
+ P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag);
+
r->status = REQ_STATUS_IDLE;
- if (r->tc->tag != P9_NOTAG && p9_idpool_check(r->tc->tag, c->tagpool))
- p9_idpool_put(r->tc->tag, c->tagpool);
+ if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool))
+ p9_idpool_put(tag, c->tagpool);
/* if this was a flush request we have to free response fcall */
- if (r->tc->id == P9_TFLUSH) {
+ if (r->rc->id == P9_RFLUSH) {
kfree(r->tc);
kfree(r->rc);
}
@@ -333,30 +329,28 @@ void p9_client_cb(struct p9_client *c, struct p9_req_t *req)
struct p9_req_t *other_req;
unsigned long flags;
- P9_DPRINTK(P9_DEBUG_MUX, ": %d\n", req->tc->tag);
+ P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag);
if (req->status == REQ_STATUS_ERROR)
wake_up(req->wq);
- if (req->tc->id == P9_TFLUSH) { /* flush receive path */
- P9_DPRINTK(P9_DEBUG_MUX, "flush: %d\n", req->tc->tag);
+ if (req->flush_tag) { /* flush receive path */
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RFLUSH %d\n", req->tc->tag);
spin_lock_irqsave(&c->lock, flags);
- other_req = p9_tag_lookup(c, req->tc->params.tflush.oldtag);
- if (other_req->flush_tag != req->tc->tag) /* stale flush */
+ other_req = p9_tag_lookup(c, req->flush_tag);
+ if (other_req->status != REQ_STATUS_FLSH) /* stale flush */
spin_unlock_irqrestore(&c->lock, flags);
else {
- BUG_ON(other_req->status != REQ_STATUS_FLSH);
other_req->status = REQ_STATUS_FLSHD;
spin_unlock_irqrestore(&c->lock, flags);
wake_up(other_req->wq);
}
p9_free_req(c, req);
} else { /* normal receive path */
- P9_DPRINTK(P9_DEBUG_MUX, "normal: %d\n", req->tc->tag);
+ P9_DPRINTK(P9_DEBUG_MUX, "normal: tag %d\n", req->tc->tag);
spin_lock_irqsave(&c->lock, flags);
if (req->status != REQ_STATUS_FLSHD)
req->status = REQ_STATUS_RCVD;
- req->flush_tag = P9_NOTAG;
spin_unlock_irqrestore(&c->lock, flags);
wake_up(req->wq);
P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag);
@@ -365,28 +359,164 @@ void p9_client_cb(struct p9_client *c, struct p9_req_t *req)
EXPORT_SYMBOL(p9_client_cb);
/**
+ * p9_parse_header - parse header arguments out of a packet
+ * @pdu: packet to parse
+ * @size: size of packet
+ * @type: type of request
+ * @tag: tag of packet
+ * @rewind: set if we need to rewind offset afterwards
+ */
+
+int
+p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag,
+ int rewind)
+{
+ int8_t r_type;
+ int16_t r_tag;
+ int32_t r_size;
+ int offset = pdu->offset;
+ int err;
+
+ pdu->offset = 0;
+ if (pdu->size == 0)
+ pdu->size = 7;
+
+ err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag);
+ if (err)
+ goto rewind_and_exit;
+
+ pdu->size = r_size;
+ pdu->id = r_type;
+ pdu->tag = r_tag;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "pdu: type: %d tag: %d size=%d offset=%d\n",
+ pdu->id, pdu->tag, pdu->size, pdu->offset);
+
+ if (type)
+ *type = r_type;
+ if (tag)
+ *tag = r_tag;
+ if (size)
+ *size = r_size;
+
+
+rewind_and_exit:
+ if (rewind)
+ pdu->offset = offset;
+ return err;
+}
+EXPORT_SYMBOL(p9_parse_header);
+
+/**
+ * p9_check_errors - check 9p packet for error return and process it
+ * @c: current client instance
+ * @req: request to parse and check for error conditions
+ *
+ * returns error code if one is discovered, otherwise returns 0
+ *
+ * this will have to be more complicated if we have multiple
+ * error packet types
+ */
+
+static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
+{
+ int8_t type;
+ int err;
+
+ err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
+ if (err) {
+ P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);
+ return err;
+ }
+
+ if (type == P9_RERROR) {
+ int ecode;
+ char *ename;
+
+ err = p9pdu_readf(req->rc, c->dotu, "s?d", &ename, &ecode);
+ if (err) {
+ P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n",
+ err);
+ return err;
+ }
+
+ if (c->dotu)
+ err = -ecode;
+
+ if (!err) {
+ err = p9_errstr2errno(ename, strlen(ename));
+
+ /* string match failed */
+ if (!err)
+ err = -ESERVERFAULT;
+ }
+
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename);
+
+ kfree(ename);
+ } else
+ err = 0;
+
+ return err;
+}
+
+/**
+ * p9_client_flush - flush (cancel) a request
+ * c: client state
+ * req: request to cancel
+ *
+ * This sents a flush for a particular requests and links
+ * the flush request to the original request. The current
+ * code only supports a single flush request although the protocol
+ * allows for multiple flush requests to be sent for a single request.
+ *
+ */
+
+static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
+{
+ struct p9_req_t *req;
+ int16_t oldtag;
+ int err;
+
+ err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);
+ if (err)
+ return err;
+
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag);
+
+ req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ req->flush_tag = oldtag;
+
+ /* we don't free anything here because RPC isn't complete */
+ return 0;
+}
+
+/**
* p9_client_rpc - issue a request and wait for a response
* @c: client session
- * @tc: &p9_fcall request to transmit
- * @rc: &p9_fcall to put reponse into
+ * @type: type of request
+ * @fmt: protocol format string (see protocol.c)
*
- * Returns 0 on success, error code on failure
+ * Returns request structure (which client must free using p9_free_req)
*/
-static int
-p9_client_rpc(struct p9_client *c, struct p9_fcall *tc, struct p9_fcall **rc)
+static struct p9_req_t *
+p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
{
- int tag, err, size;
- char *rdata;
+ va_list ap;
+ int tag, err;
struct p9_req_t *req;
unsigned long flags;
int sigpending;
int flushed = 0;
- P9_DPRINTK(P9_DEBUG_9P, "client %p tc %p rc %p\n", c, tc, rc);
+ P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type);
if (c->status != Connected)
- return -EIO;
+ return ERR_PTR(-EIO);
if (signal_pending(current)) {
sigpending = 1;
@@ -395,50 +525,22 @@ p9_client_rpc(struct p9_client *c, struct p9_fcall *tc, struct p9_fcall **rc)
sigpending = 0;
tag = P9_NOTAG;
- if (tc->id != P9_TVERSION) {
+ if (type != P9_TVERSION) {
tag = p9_idpool_get(c->tagpool);
if (tag < 0)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
}
req = p9_tag_alloc(c, tag);
+ if (IS_ERR(req))
+ return req;
- /* if this is a flush request, backlink flush request now to
- * avoid race conditions later. */
- if (tc->id == P9_TFLUSH) {
- struct p9_req_t *other_req =
- p9_tag_lookup(c, tc->params.tflush.oldtag);
- if (other_req->status == REQ_STATUS_FLSH)
- other_req->flush_tag = tag;
- }
-
- p9_set_tag(tc, tag);
-
- /*
- * if client passed in a pre-allocated response fcall struct
- * then we just use that, otherwise we allocate one.
- */
-
- if (rc == NULL)
- req->rc = NULL;
- else
- req->rc = *rc;
- if (req->rc == NULL) {
- req->rc = kmalloc(sizeof(struct p9_fcall) + c->msize,
- GFP_KERNEL);
- if (!req->rc) {
- err = -ENOMEM;
- p9_idpool_put(tag, c->tagpool);
- p9_free_req(c, req);
- goto reterr;
- }
- *rc = req->rc;
- }
-
- rdata = (char *)req->rc+sizeof(struct p9_fcall);
-
- req->tc = tc;
- P9_DPRINTK(P9_DEBUG_9P, "request: tc: %p rc: %p\n", req->tc, req->rc);
+ /* marshall the data */
+ p9pdu_prepare(req->tc, tag, type);
+ va_start(ap, fmt);
+ err = p9pdu_vwritef(req->tc, c->dotu, fmt, ap);
+ va_end(ap);
+ p9pdu_finalize(req->tc);
err = c->trans_mod->request(c, req);
if (err < 0) {
@@ -447,28 +549,28 @@ p9_client_rpc(struct p9_client *c, struct p9_fcall *tc, struct p9_fcall **rc)
}
/* if it was a flush we just transmitted, return our tag */
- if (tc->id == P9_TFLUSH)
- return 0;
+ if (type == P9_TFLUSH)
+ return req;
again:
- P9_DPRINTK(P9_DEBUG_9P, "wait %p tag: %d\n", req->wq, tag);
+ P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag);
err = wait_event_interruptible(*req->wq,
req->status >= REQ_STATUS_RCVD);
- P9_DPRINTK(P9_DEBUG_9P, "wait %p tag: %d returned %d (flushed=%d)\n",
+ P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d (flushed=%d)\n",
req->wq, tag, err, flushed);
if (req->status == REQ_STATUS_ERROR) {
- P9_DPRINTK(P9_DEBUG_9P, "req_status error %d\n", req->t_err);
+ P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
err = req->t_err;
} else if (err == -ERESTARTSYS && flushed) {
- P9_DPRINTK(P9_DEBUG_9P, "flushed - going again\n");
+ P9_DPRINTK(P9_DEBUG_MUX, "flushed - going again\n");
goto again;
} else if (req->status == REQ_STATUS_FLSHD) {
- P9_DPRINTK(P9_DEBUG_9P, "flushed - erestartsys\n");
+ P9_DPRINTK(P9_DEBUG_MUX, "flushed - erestartsys\n");
err = -ERESTARTSYS;
}
if ((err == -ERESTARTSYS) && (c->status == Connected) && (!flushed)) {
- P9_DPRINTK(P9_DEBUG_9P, "flushing\n");
+ P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
spin_lock_irqsave(&c->lock, flags);
if (req->status == REQ_STATUS_SENT)
req->status = REQ_STATUS_FLSH;
@@ -493,42 +595,17 @@ again:
if (err < 0)
goto reterr;
- size = le32_to_cpu(*(__le32 *) rdata);
-
- err = p9_deserialize_fcall(rdata, size, req->rc, c->dotu);
- if (err < 0) {
- P9_DPRINTK(P9_DEBUG_9P,
- "9p debug: client rpc deserialize returned %d\n", err);
- goto reterr;
+ err = p9_check_errors(c, req);
+ if (!err) {
+ P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type);
+ return req;
}
- if (req->rc->id == P9_RERROR) {
- int ecode = req->rc->params.rerror.errno;
- struct p9_str *ename = &req->rc->params.rerror.error;
-
- P9_DPRINTK(P9_DEBUG_MUX, "Rerror %.*s\n", ename->len,
- ename->str);
-
- if (c->dotu)
- err = -ecode;
-
- if (!err) {
- err = p9_errstr2errno(ename->str, ename->len);
-
- /* string match failed */
- if (!err) {
- PRINT_FCALL_ERROR("unknown error", req->rc);
- err = -ESERVERFAULT;
- }
- }
- } else
- err = 0;
-
reterr:
+ P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type,
+ err);
p9_free_req(c, req);
-
- P9_DPRINTK(P9_DEBUG_9P, "returning %d\n", err);
- return err;
+ return ERR_PTR(err);
}
static struct p9_fid *p9_fid_create(struct p9_client *clnt)
@@ -536,7 +613,7 @@ static struct p9_fid *p9_fid_create(struct p9_client *clnt)
int err;
struct p9_fid *fid;
- P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
+ P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt);
fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
if (!fid)
return ERR_PTR(-ENOMEM);
@@ -569,7 +646,7 @@ static void p9_fid_destroy(struct p9_fid *fid)
{
struct p9_client *clnt;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid);
clnt = fid->clnt;
p9_idpool_put(fid->fid, clnt->fidpool);
spin_lock(&clnt->lock);
@@ -578,49 +655,46 @@ static void p9_fid_destroy(struct p9_fid *fid)
kfree(fid);
}
-static int p9_client_version(struct p9_client *clnt)
+int p9_client_version(struct p9_client *c)
{
int err = 0;
- struct p9_fcall *tc, *rc;
- struct p9_str *version;
+ struct p9_req_t *req;
+ char *version;
+ int msize;
- P9_DPRINTK(P9_DEBUG_9P, "%p\n", clnt);
- err = 0;
- tc = NULL;
- rc = NULL;
-
- tc = p9_create_tversion(clnt->msize,
- clnt->dotu ? "9P2000.u" : "9P2000");
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto error;
- }
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d extended %d\n",
+ c->msize, c->dotu);
+ req = p9_client_rpc(c, P9_TVERSION, "ds", c->msize,
+ c->dotu ? "9P2000.u" : "9P2000");
+ if (IS_ERR(req))
+ return PTR_ERR(req);
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
+ err = p9pdu_readf(req->rc, c->dotu, "ds", &msize, &version);
+ if (err) {
+ P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
goto error;
+ }
- version = &rc->params.rversion.version;
- if (version->len == 8 && !memcmp(version->str, "9P2000.u", 8))
- clnt->dotu = 1;
- else if (version->len == 6 && !memcmp(version->str, "9P2000", 6))
- clnt->dotu = 0;
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version);
+ if (!memcmp(version, "9P2000.u", 8))
+ c->dotu = 1;
+ else if (!memcmp(version, "9P2000", 6))
+ c->dotu = 0;
else {
err = -EREMOTEIO;
goto error;
}
- if (rc->params.rversion.msize < clnt->msize)
- clnt->msize = rc->params.rversion.msize;
+ if (msize < c->msize)
+ c->msize = msize;
error:
- kfree(tc);
- kfree(rc);
+ kfree(version);
+ p9_free_req(c, req);
return err;
}
-EXPORT_SYMBOL(p9_client_auth);
+EXPORT_SYMBOL(p9_client_version);
struct p9_client *p9_client_create(const char *dev_name, char *options)
{
@@ -656,7 +730,7 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
goto error;
}
- P9_DPRINTK(P9_DEBUG_9P, "clnt %p trans %p msize %d dotu %d\n",
+ P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d dotu %d\n",
clnt, clnt->trans_mod, clnt->msize, clnt->dotu);
err = clnt->trans_mod->create(clnt, dev_name, options);
@@ -682,7 +756,7 @@ void p9_client_destroy(struct p9_client *clnt)
{
struct p9_fid *fid, *fidptr;
- P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
+ P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt);
if (clnt->trans_mod)
clnt->trans_mod->close(clnt);
@@ -712,14 +786,13 @@ struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
char *uname, u32 n_uname, char *aname)
{
int err;
- struct p9_fcall *tc, *rc;
+ struct p9_req_t *req;
struct p9_fid *fid;
+ struct p9_qid qid;
- P9_DPRINTK(P9_DEBUG_9P, "clnt %p afid %d uname %s aname %s\n",
- clnt, afid?afid->fid:-1, uname, aname);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
+ afid ? afid->fid : -1, uname, aname);
err = 0;
- tc = NULL;
- rc = NULL;
fid = p9_fid_create(clnt);
if (IS_ERR(fid)) {
@@ -728,73 +801,75 @@ struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
goto error;
}
- tc = p9_create_tattach(fid->fid, afid?afid->fid:P9_NOFID, uname, aname,
- n_uname, clnt->dotu);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
+ req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid,
+ afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
+ err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid);
+ if (err) {
+ p9_free_req(clnt, req);
goto error;
+ }
- memmove(&fid->qid, &rc->params.rattach.qid, sizeof(struct p9_qid));
- kfree(tc);
- kfree(rc);
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n",
+ qid.type, qid.path, qid.version);
+
+ memmove(&fid->qid, &qid, sizeof(struct p9_qid));
+
+ p9_free_req(clnt, req);
return fid;
error:
- kfree(tc);
- kfree(rc);
if (fid)
p9_fid_destroy(fid);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_attach);
-struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname,
- u32 n_uname, char *aname)
+struct p9_fid *
+p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname)
{
int err;
- struct p9_fcall *tc, *rc;
- struct p9_fid *fid;
+ struct p9_req_t *req;
+ struct p9_qid qid;
+ struct p9_fid *afid;
- P9_DPRINTK(P9_DEBUG_9P, "clnt %p uname %s aname %s\n", clnt, uname,
- aname);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname);
err = 0;
- tc = NULL;
- rc = NULL;
- fid = p9_fid_create(clnt);
- if (IS_ERR(fid)) {
- err = PTR_ERR(fid);
- fid = NULL;
+ afid = p9_fid_create(clnt);
+ if (IS_ERR(afid)) {
+ err = PTR_ERR(afid);
+ afid = NULL;
goto error;
}
- tc = p9_create_tauth(fid->fid, uname, aname, n_uname, clnt->dotu);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
+ req = p9_client_rpc(clnt, P9_TAUTH, "dss?d",
+ afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
+ err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid);
+ if (err) {
+ p9_free_req(clnt, req);
goto error;
+ }
- memmove(&fid->qid, &rc->params.rauth.qid, sizeof(struct p9_qid));
- kfree(tc);
- kfree(rc);
- return fid;
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n",
+ qid.type, qid.path, qid.version);
+
+ memmove(&afid->qid, &qid, sizeof(struct p9_qid));
+ p9_free_req(clnt, req);
+ return afid;
error:
- kfree(tc);
- kfree(rc);
- if (fid)
- p9_fid_destroy(fid);
+ if (afid)
+ p9_fid_destroy(afid);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_auth);
@@ -803,15 +878,13 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
int clone)
{
int err;
- struct p9_fcall *tc, *rc;
struct p9_client *clnt;
struct p9_fid *fid;
+ struct p9_qid *wqids;
+ struct p9_req_t *req;
+ int16_t nwqids, count;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d nwname %d wname[0] %s\n",
- oldfid->fid, nwname, wnames?wnames[0]:NULL);
err = 0;
- tc = NULL;
- rc = NULL;
clnt = oldfid->clnt;
if (clone) {
fid = p9_fid_create(clnt);
@@ -825,53 +898,46 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
} else
fid = oldfid;
- tc = p9_create_twalk(oldfid->fid, fid->fid, nwname, wnames);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
+
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d 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,
+ nwname, wnames);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
- if (err) {
- if (rc && rc->id == P9_RWALK)
- goto clunk_fid;
- else
- goto error;
- }
+ err = p9pdu_readf(req->rc, clnt->dotu, "R", &nwqids, &wqids);
+ p9_free_req(clnt, req);
+ if (err)
+ goto clunk_fid;
- if (rc->params.rwalk.nwqid != nwname) {
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids);
+
+ if (nwqids != nwname) {
err = -ENOENT;
goto clunk_fid;
}
+ for (count = 0; count < nwqids; count++)
+ P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n",
+ count, wqids[count].type, wqids[count].path,
+ wqids[count].version);
+
if (nwname)
- memmove(&fid->qid,
- &rc->params.rwalk.wqids[rc->params.rwalk.nwqid - 1],
- sizeof(struct p9_qid));
+ memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid));
else
fid->qid = oldfid->qid;
- kfree(tc);
- kfree(rc);
return fid;
clunk_fid:
- kfree(tc);
- kfree(rc);
- rc = NULL;
- tc = p9_create_tclunk(fid->fid);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto error;
- }
-
- p9_client_rpc(clnt, tc, &rc);
+ p9_client_clunk(fid);
+ fid = NULL;
error:
- kfree(tc);
- kfree(rc);
if (fid && (fid != oldfid))
p9_fid_destroy(fid);
@@ -882,35 +948,36 @@ EXPORT_SYMBOL(p9_client_walk);
int p9_client_open(struct p9_fid *fid, int mode)
{
int err;
- struct p9_fcall *tc, *rc;
struct p9_client *clnt;
+ struct p9_req_t *req;
+ struct p9_qid qid;
+ int iounit;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d mode %d\n", fid->fid, mode);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode);
err = 0;
- tc = NULL;
- rc = NULL;
clnt = fid->clnt;
if (fid->mode != -1)
return -EINVAL;
- tc = p9_create_topen(fid->fid, mode);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto done;
+ req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
+ err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit);
+ p9_free_req(clnt, req);
if (err)
- goto done;
+ goto error;
+
+ P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n",
+ qid.type, qid.path, qid.version, iounit);
fid->mode = mode;
- fid->iounit = rc->params.ropen.iounit;
+ fid->iounit = iounit;
-done:
- kfree(tc);
- kfree(rc);
+error:
return err;
}
EXPORT_SYMBOL(p9_client_open);
@@ -919,37 +986,38 @@ int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
char *extension)
{
int err;
- struct p9_fcall *tc, *rc;
struct p9_client *clnt;
+ struct p9_req_t *req;
+ struct p9_qid qid;
+ int iounit;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d name %s perm %d mode %d\n", fid->fid,
- name, perm, mode);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n",
+ fid->fid, name, perm, mode);
err = 0;
- tc = NULL;
- rc = NULL;
clnt = fid->clnt;
if (fid->mode != -1)
return -EINVAL;
- tc = p9_create_tcreate(fid->fid, name, perm, mode, extension,
- clnt->dotu);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto done;
+ req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm,
+ mode, extension);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
+ err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit);
+ p9_free_req(clnt, req);
if (err)
- goto done;
+ goto error;
+
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n",
+ qid.type, qid.path, qid.version, iounit);
fid->mode = mode;
- fid->iounit = rc->params.ropen.iounit;
+ fid->iounit = iounit;
-done:
- kfree(tc);
- kfree(rc);
+error:
return err;
}
EXPORT_SYMBOL(p9_client_fcreate);
@@ -957,31 +1025,25 @@ EXPORT_SYMBOL(p9_client_fcreate);
int p9_client_clunk(struct p9_fid *fid)
{
int err;
- struct p9_fcall *tc, *rc;
struct p9_client *clnt;
+ struct p9_req_t *req;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
err = 0;
- tc = NULL;
- rc = NULL;
clnt = fid->clnt;
- tc = p9_create_tclunk(fid->fid);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto done;
+ req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
- goto done;
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid);
+ p9_free_req(clnt, req);
p9_fid_destroy(fid);
-done:
- kfree(tc);
- kfree(rc);
+error:
return err;
}
EXPORT_SYMBOL(p9_client_clunk);
@@ -989,31 +1051,25 @@ EXPORT_SYMBOL(p9_client_clunk);
int p9_client_remove(struct p9_fid *fid)
{
int err;
- struct p9_fcall *tc, *rc;
struct p9_client *clnt;
+ struct p9_req_t *req;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid);
err = 0;
- tc = NULL;
- rc = NULL;
clnt = fid->clnt;
- tc = p9_create_tremove(fid->fid);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto done;
+ req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
- goto done;
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid);
+ p9_free_req(clnt, req);
p9_fid_destroy(fid);
-done:
- kfree(tc);
- kfree(rc);
+error:
return err;
}
EXPORT_SYMBOL(p9_client_remove);
@@ -1022,15 +1078,14 @@ int
p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
u32 count)
{
- int err, n, rsize, total;
- struct p9_fcall *tc, *rc;
+ int err, rsize, total;
struct p9_client *clnt;
+ struct p9_req_t *req;
+ char *dataptr;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu %d\n", fid->fid,
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid,
(long long unsigned) offset, count);
err = 0;
- tc = NULL;
- rc = NULL;
clnt = fid->clnt;
total = 0;
@@ -1038,53 +1093,40 @@ p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
rsize = clnt->msize - P9_IOHDRSZ;
- do {
- if (count < rsize)
- rsize = count;
+ if (count < rsize)
+ rsize = count;
- tc = p9_create_tread(fid->fid, offset, rsize);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto error;
- }
+ req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
+ }
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
- goto error;
+ err = p9pdu_readf(req->rc, clnt->dotu, "D", &count, &dataptr);
+ if (err)
+ goto free_and_error;
- n = rc->params.rread.count;
- if (n > count)
- n = count;
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
- if (data) {
- memmove(data, rc->params.rread.data, n);
- data += n;
- }
+ if (data) {
+ memmove(data, dataptr, count);
+ data += count;
+ }
- if (udata) {
- err = copy_to_user(udata, rc->params.rread.data, n);
- if (err) {
- err = -EFAULT;
- goto error;
- }
- udata += n;
+ if (udata) {
+ err = copy_to_user(udata, dataptr, count);
+ if (err) {
+ err = -EFAULT;
+ goto free_and_error;
}
+ }
- count -= n;
- offset += n;
- total += n;
- kfree(tc);
- tc = NULL;
- kfree(rc);
- rc = NULL;
- } while (count > 0 && n == rsize);
-
- return total;
+ p9_free_req(clnt, req);
+ return count;
+free_and_error:
+ p9_free_req(clnt, req);
error:
- kfree(tc);
- kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_read);
@@ -1093,15 +1135,13 @@ int
p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
u64 offset, u32 count)
{
- int err, n, rsize, total;
- struct p9_fcall *tc, *rc;
+ int err, rsize, total;
struct p9_client *clnt;
+ struct p9_req_t *req;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
- (long long unsigned) offset, count);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n",
+ fid->fid, (long long unsigned) offset, count);
err = 0;
- tc = NULL;
- rc = NULL;
clnt = fid->clnt;
total = 0;
@@ -1109,129 +1149,70 @@ p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
rsize = clnt->msize - P9_IOHDRSZ;
- do {
- if (count < rsize)
- rsize = count;
-
- if (data)
- tc = p9_create_twrite(fid->fid, offset, rsize, data);
- else
- tc = p9_create_twrite_u(fid->fid, offset, rsize, udata);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto error;
- }
-
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
- goto error;
-
- n = rc->params.rread.count;
- count -= n;
-
- if (data)
- data += n;
- else
- udata += n;
+ 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);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
+ }
- offset += n;
- total += n;
- kfree(tc);
- tc = NULL;
- kfree(rc);
- rc = NULL;
- } while (count > 0);
+ err = p9pdu_readf(req->rc, clnt->dotu, "d", &count);
+ if (err)
+ goto free_and_error;
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count);
- return total;
+ p9_free_req(clnt, req);
+ return count;
+free_and_error:
+ p9_free_req(clnt, req);
error:
- kfree(tc);
- kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_write);
-static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu)
+struct p9_wstat *p9_client_stat(struct p9_fid *fid)
{
- int n;
- char *p;
- struct p9_stat *ret;
-
- n = sizeof(struct p9_stat) + st->name.len + st->uid.len + st->gid.len +
- st->muid.len;
+ int err;
+ struct p9_client *clnt;
+ struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL);
+ struct p9_req_t *req;
+ u16 ignored;
- if (dotu)
- n += st->extension.len;
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid);
- ret = kmalloc(n, GFP_KERNEL);
if (!ret)
return ERR_PTR(-ENOMEM);
- memmove(ret, st, sizeof(struct p9_stat));
- p = ((char *) ret) + sizeof(struct p9_stat);
- memmove(p, st->name.str, st->name.len);
- ret->name.str = p;
- p += st->name.len;
- memmove(p, st->uid.str, st->uid.len);
- ret->uid.str = p;
- p += st->uid.len;
- memmove(p, st->gid.str, st->gid.len);
- ret->gid.str = p;
- p += st->gid.len;
- memmove(p, st->muid.str, st->muid.len);
- ret->muid.str = p;
- p += st->muid.len;
-
- if (dotu) {
- memmove(p, st->extension.str, st->extension.len);
- ret->extension.str = p;
- p += st->extension.len;
- }
-
- return ret;
-}
-
-struct p9_stat *p9_client_stat(struct p9_fid *fid)
-{
- int err;
- struct p9_fcall *tc, *rc;
- struct p9_client *clnt;
- struct p9_stat *ret;
-
- P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
err = 0;
- tc = NULL;
- rc = NULL;
- ret = NULL;
clnt = fid->clnt;
- tc = p9_create_tstat(fid->fid);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
+ req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
+ err = p9pdu_readf(req->rc, clnt->dotu, "wS", &ignored, ret);
+ p9_free_req(clnt, req);
if (err)
goto error;
- ret = p9_clone_stat(&rc->params.rstat.stat, clnt->dotu);
- if (IS_ERR(ret)) {
- err = PTR_ERR(ret);
- ret = NULL;
- goto error;
- }
+ P9_DPRINTK(P9_DEBUG_9P,
+ "<<< RSTAT sz=%x type=%x dev=%x qid=%2.2x %4.4x %8.8llx"
+ " mode=%8.8x uid=%d gid=%d size=%lld %s\n",
+ ret->size, ret->type, ret->dev, ret->qid.type,
+ ret->qid.version, ret->qid.path, ret->mode,
+ ret->n_uid, ret->n_gid, ret->length, ret->name);
- kfree(tc);
- kfree(rc);
return ret;
-
error:
- kfree(tc);
- kfree(rc);
- kfree(ret);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_stat);
@@ -1239,27 +1220,23 @@ EXPORT_SYMBOL(p9_client_stat);
int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
{
int err;
- struct p9_fcall *tc, *rc;
+ struct p9_req_t *req;
struct p9_client *clnt;
- P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
err = 0;
- tc = NULL;
- rc = NULL;
clnt = fid->clnt;
- tc = p9_create_twstat(fid->fid, wst, clnt->dotu);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto done;
+ req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, 0, wst);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ goto error;
}
- err = p9_client_rpc(clnt, tc, &rc);
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid);
-done:
- kfree(tc);
- kfree(rc);
+ p9_free_req(clnt, req);
+error:
return err;
}
EXPORT_SYMBOL(p9_client_wstat);
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 43e9822..4ebeffd 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -27,6 +27,7 @@
#include <linux/module.h>
#include <linux/errno.h>
+#include <linux/uaccess.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "protocol.h"
@@ -51,6 +52,38 @@
static int
p9pdu_writef(struct p9_fcall *pdu, int optional, const char *fmt, ...);
+#define PACKET_DEBUG 0
+
+void
+p9pdu_dump(int way, struct p9_fcall *pdu)
+{
+ int i, n;
+ u8 *data = pdu->sdata;
+ int datalen = pdu->size;
+ char buf[255];
+ int buflen = 255;
+
+ i = n = 0;
+ if (datalen > (buflen-16))
+ datalen = buflen-16;
+ while (i < datalen) {
+ n += scnprintf(buf + n, buflen - n, "%02x ", data[i]);
+ if (i%4 == 3)
+ n += scnprintf(buf + n, buflen - n, " ");
+ if (i%32 == 31)
+ n += scnprintf(buf + n, buflen - n, "\n");
+
+ i++;
+ }
+ n += scnprintf(buf + n, buflen - n, "\n");
+
+ if (way)
+ printk(KERN_NOTICE "[[(%d)[ %s\n", datalen, buf);
+ else
+ printk(KERN_NOTICE "]](%d)] %s\n", datalen, buf);
+}
+EXPORT_SYMBOL(p9pdu_dump);
+
void p9stat_free(struct p9_wstat *stbuf)
{
kfree(stbuf->name);
@@ -77,6 +110,18 @@ static size_t pdu_write(struct p9_fcall *pdu, const void *data, size_t size)
return size - len;
}
+static size_t
+pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size)
+{
+ size_t len = MIN(pdu->capacity - pdu->size, size);
+ int err = copy_from_user(&pdu->sdata[pdu->size], udata, len);
+ if (err)
+ printk(KERN_WARNING "pdu_write_u returning: %d\n", err);
+
+ pdu->size += len;
+ return size - len;
+}
+
/*
b - int8_t
w - int16_t
@@ -174,7 +219,6 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
stbuf->extension = NULL;
stbuf->n_uid = stbuf->n_gid = stbuf->n_muid =
-1;
-
errcode =
p9pdu_readf(pdu, optional,
"wwdQdddqssss?sddd",
@@ -332,7 +376,6 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
case 's':{
const char *ptr = va_arg(ap, const char *);
int16_t len = 0;
-
if (ptr)
len = MIN(strlen(ptr), USHORT_MAX);
@@ -356,7 +399,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
p9pdu_writef(pdu, optional,
"wwdQdddqssss?sddd",
stbuf->size, stbuf->type,
- stbuf->dev, stbuf->qid,
+ stbuf->dev, &stbuf->qid,
stbuf->mode, stbuf->atime,
stbuf->mtime, stbuf->length,
stbuf->name, stbuf->uid,
@@ -374,6 +417,16 @@ p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
errcode = -EFAULT;
}
break;
+ case 'U':{
+ int32_t count = va_arg(ap, int32_t);
+ const char __user *udata =
+ va_arg(ap, const void *);
+ errcode =
+ p9pdu_writef(pdu, optional, "d", count);
+ if (!errcode && pdu_write_u(pdu, udata, count))
+ errcode = -EFAULT;
+ }
+ break;
case 'T':{
int16_t nwname = va_arg(ap, int);
const char **wnames = va_arg(ap, const char **);
@@ -455,3 +508,29 @@ p9pdu_writef(struct p9_fcall *pdu, int optional, const char *fmt, ...)
return ret;
}
+
+int p9pdu_prepare(struct p9_fcall *pdu, int16_t tag, int8_t type)
+{
+ return p9pdu_writef(pdu, 0, "dbw", 0, type, tag);
+}
+
+int p9pdu_finalize(struct p9_fcall *pdu)
+{
+ int size = pdu->size;
+ int err;
+
+ pdu->size = 0;
+ err = p9pdu_writef(pdu, 0, "d", size);
+ pdu->size = size;
+
+ if (PACKET_DEBUG)
+ p9pdu_dump(0, pdu);
+
+ return err;
+}
+
+void p9pdu_reset(struct p9_fcall *pdu)
+{
+ pdu->offset = 0;
+ pdu->size = 0;
+}
diff --git a/net/9p/protocol.h b/net/9p/protocol.h
index 596ee10..ccde462 100644
--- a/net/9p/protocol.h
+++ b/net/9p/protocol.h
@@ -27,5 +27,8 @@
int
p9pdu_vwritef(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap);
-
int p9pdu_readf(struct p9_fcall *pdu, int optional, const char *fmt, ...);
+int p9pdu_prepare(struct p9_fcall *pdu, int16_t tag, int8_t type);
+int p9pdu_finalize(struct p9_fcall *pdu);
+void p9pdu_dump(int, struct p9_fcall *);
+void p9pdu_reset(struct p9_fcall *pdu);
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index e147ec5..e8ebe2c 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -181,7 +181,7 @@ static void p9_mux_poll_stop(struct p9_conn *m)
*
*/
-void p9_conn_cancel(struct p9_conn *m, int err)
+static void p9_conn_cancel(struct p9_conn *m, int err)
{
struct p9_req_t *req, *rtmp;
unsigned long flags;
@@ -287,7 +287,7 @@ static void p9_read_work(struct work_struct *work)
if (m->err < 0)
return;
- P9_DPRINTK(P9_DEBUG_MUX, "start mux %p pos %d\n", m, m->rpos);
+ P9_DPRINTK(P9_DEBUG_TRANS, "start mux %p pos %d\n", m, m->rpos);
if (!m->rbuf) {
m->rbuf = m->tmp_buf;
@@ -296,11 +296,11 @@ static void p9_read_work(struct work_struct *work)
}
clear_bit(Rpending, &m->wsched);
- P9_DPRINTK(P9_DEBUG_MUX, "read mux %p pos %d size: %d = %d\n", m,
+ P9_DPRINTK(P9_DEBUG_TRANS, "read mux %p pos %d size: %d = %d\n", m,
m->rpos, m->rsize, m->rsize-m->rpos);
err = p9_fd_read(m->client, m->rbuf + m->rpos,
m->rsize - m->rpos);
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p got %d bytes\n", m, err);
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p got %d bytes\n", m, err);
if (err == -EAGAIN) {
clear_bit(Rworksched, &m->wsched);
return;
@@ -313,7 +313,7 @@ static void p9_read_work(struct work_struct *work)
if ((!m->req) && (m->rpos == m->rsize)) { /* header read in */
u16 tag;
- P9_DPRINTK(P9_DEBUG_MUX, "got new header\n");
+ P9_DPRINTK(P9_DEBUG_TRANS, "got new header\n");
n = le32_to_cpu(*(__le32 *) m->rbuf); /* read packet size */
if (n >= m->client->msize) {
@@ -324,8 +324,8 @@ static void p9_read_work(struct work_struct *work)
}
tag = le16_to_cpu(*(__le16 *) (m->rbuf+5)); /* read tag */
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p pkt: size: %d bytes tag: %d\n",
- m, n, tag);
+ P9_DPRINTK(P9_DEBUG_TRANS,
+ "mux %p pkt: size: %d bytes tag: %d\n", m, n, tag);
m->req = p9_tag_lookup(m->client, tag);
if (!m->req) {
@@ -351,7 +351,7 @@ static void p9_read_work(struct work_struct *work)
/* not an else because some packets (like clunk) have no payload */
if ((m->req) && (m->rpos == m->rsize)) { /* packet is read in */
- P9_DPRINTK(P9_DEBUG_MUX, "got new packet\n");
+ P9_DPRINTK(P9_DEBUG_TRANS, "got new packet\n");
list_del(&m->req->req_list);
p9_client_cb(m->client, m->req);
@@ -369,7 +369,7 @@ static void p9_read_work(struct work_struct *work)
n = p9_fd_poll(m->client, NULL);
if (n & POLLIN) {
- P9_DPRINTK(P9_DEBUG_MUX, "schedule read work %p\n", m);
+ P9_DPRINTK(P9_DEBUG_TRANS, "sched read work %p\n", m);
queue_work(p9_mux_wq, &m->rq);
} else
clear_bit(Rworksched, &m->wsched);
@@ -453,11 +453,11 @@ static void p9_write_work(struct work_struct *work)
spin_unlock(&m->client->lock);
}
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p pos %d size %d\n", m, m->wpos,
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p pos %d size %d\n", m, m->wpos,
m->wsize);
clear_bit(Wpending, &m->wsched);
err = p9_fd_write(m->client, m->wbuf + m->wpos, m->wsize - m->wpos);
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p sent %d bytes\n", m, err);
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p sent %d bytes\n", m, err);
if (err == -EAGAIN) {
clear_bit(Wworksched, &m->wsched);
return;
@@ -481,7 +481,7 @@ static void p9_write_work(struct work_struct *work)
n = p9_fd_poll(m->client, NULL);
if (n & POLLOUT) {
- P9_DPRINTK(P9_DEBUG_MUX, "schedule write work %p\n", m);
+ P9_DPRINTK(P9_DEBUG_TRANS, "sched write work %p\n", m);
queue_work(p9_mux_wq, &m->wq);
} else
clear_bit(Wworksched, &m->wsched);
@@ -558,7 +558,8 @@ static struct p9_conn *p9_conn_create(struct p9_client *client)
int n;
struct p9_conn *m;
- P9_DPRINTK(P9_DEBUG_MUX, "client %p msize %d\n", client, client->msize);
+ P9_DPRINTK(P9_DEBUG_TRANS, "client %p msize %d\n", client,
+ client->msize);
m = kzalloc(sizeof(struct p9_conn), GFP_KERNEL);
if (!m)
return ERR_PTR(-ENOMEM);
@@ -575,12 +576,12 @@ static struct p9_conn *p9_conn_create(struct p9_client *client)
n = p9_fd_poll(client, &m->pt);
if (n & POLLIN) {
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p can read\n", m);
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p can read\n", m);
set_bit(Rpending, &m->wsched);
}
if (n & POLLOUT) {
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p can write\n", m);
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p can write\n", m);
set_bit(Wpending, &m->wsched);
}
@@ -602,7 +603,7 @@ static void p9_poll_mux(struct p9_conn *m)
n = p9_fd_poll(m->client, NULL);
if (n < 0 || n & (POLLERR | POLLHUP | POLLNVAL)) {
- P9_DPRINTK(P9_DEBUG_MUX, "error mux %p err %d\n", m, n);
+ P9_DPRINTK(P9_DEBUG_TRANS, "error mux %p err %d\n", m, n);
if (n >= 0)
n = -ECONNRESET;
p9_conn_cancel(m, n);
@@ -610,19 +611,19 @@ static void p9_poll_mux(struct p9_conn *m)
if (n & POLLIN) {
set_bit(Rpending, &m->wsched);
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p can read\n", m);
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p can read\n", m);
if (!test_and_set_bit(Rworksched, &m->wsched)) {
- P9_DPRINTK(P9_DEBUG_MUX, "schedule read work %p\n", m);
+ P9_DPRINTK(P9_DEBUG_TRANS, "sched read work %p\n", m);
queue_work(p9_mux_wq, &m->rq);
}
}
if (n & POLLOUT) {
set_bit(Wpending, &m->wsched);
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p can write\n", m);
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p can write\n", m);
if ((m->wsize || !list_empty(&m->unsent_req_list))
&& !test_and_set_bit(Wworksched, &m->wsched)) {
- P9_DPRINTK(P9_DEBUG_MUX, "schedule write work %p\n", m);
+ P9_DPRINTK(P9_DEBUG_TRANS, "sched write work %p\n", m);
queue_work(p9_mux_wq, &m->wq);
}
}
@@ -645,8 +646,8 @@ static int p9_fd_request(struct p9_client *client, struct p9_req_t *req)
struct p9_trans_fd *ts = client->trans;
struct p9_conn *m = ts->conn;
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p task %p tcall %p id %d\n", m, current,
- req->tc, req->tc->id);
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p task %p tcall %p id %d\n", m,
+ current, req->tc, req->tc->id);
if (m->err < 0)
return m->err;
@@ -672,19 +673,12 @@ static int p9_fd_cancel(struct p9_client *client, struct p9_req_t *req)
struct p9_trans_fd *ts = client->trans;
struct p9_conn *m = ts->conn;
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p req %p\n", m, req);
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p req %p\n", m, req);
spin_lock(&client->lock);
list_del(&req->req_list);
spin_unlock(&client->lock);
- /* if a response was received for a request, do nothing */
- if (req->rc || req->t_err) {
- P9_DPRINTK(P9_DEBUG_MUX,
- "mux %p req %p response already received\n", m, req);
- return 0;
- }
-
if (req->status == REQ_STATUS_UNSENT) {
req->status = REQ_STATUS_FLSHD;
return 0;
@@ -809,7 +803,7 @@ static int p9_socket_open(struct p9_client *client, struct socket *csocket)
static void p9_conn_destroy(struct p9_conn *m)
{
- P9_DPRINTK(P9_DEBUG_MUX, "mux %p prev %p next %p\n", m,
+ P9_DPRINTK(P9_DEBUG_TRANS, "mux %p prev %p next %p\n", m,
m->mux_list.prev, m->mux_list.next);
p9_mux_poll_stop(m);
@@ -1060,7 +1054,7 @@ static int p9_poll_proc(void *a)
{
unsigned long flags;
- P9_DPRINTK(P9_DEBUG_MUX, "start %p\n", current);
+ P9_DPRINTK(P9_DEBUG_TRANS, "start %p\n", current);
repeat:
spin_lock_irqsave(&p9_poll_lock, flags);
while (!list_empty(&p9_poll_pending_list)) {
@@ -1078,7 +1072,7 @@ static int p9_poll_proc(void *a)
set_current_state(TASK_INTERRUPTIBLE);
if (list_empty(&p9_poll_pending_list)) {
- P9_DPRINTK(P9_DEBUG_MUX, "sleeping...\n");
+ P9_DPRINTK(P9_DEBUG_TRANS, "sleeping...\n");
schedule();
}
__set_current_state(TASK_RUNNING);
@@ -1086,7 +1080,7 @@ static int p9_poll_proc(void *a)
if (!kthread_should_stop())
goto repeat;
- P9_DPRINTK(P9_DEBUG_MUX, "finish\n");
+ P9_DPRINTK(P9_DEBUG_TRANS, "finish\n");
return 0;
}
diff --git a/net/9p/util.c b/net/9p/util.c
index 958fc58..dc4ec05 100644
--- a/net/9p/util.c
+++ b/net/9p/util.c
@@ -105,6 +105,7 @@ retry:
else if (error)
return -1;
+ P9_DPRINTK(P9_DEBUG_MUX, " id %d pool %p\n", i, p);
return i;
}
EXPORT_SYMBOL(p9_idpool_get);
@@ -121,6 +122,9 @@ EXPORT_SYMBOL(p9_idpool_get);
void p9_idpool_put(int id, struct p9_idpool *p)
{
unsigned long flags;
+
+ P9_DPRINTK(P9_DEBUG_MUX, " id %d pool %p\n", id, p);
+
spin_lock_irqsave(&p->lock, flags);
idr_remove(&p->pool, id);
spin_unlock_irqrestore(&p->lock, flags);
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