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-rw-r--r--net/9p/client.c1467
1 files changed, 829 insertions, 638 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index e053e06028a5..bbac2f72b4d2 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -33,12 +33,9 @@
#include <linux/uaccess.h>
#include <net/9p/9p.h>
#include <linux/parser.h>
-#include <net/9p/transport.h>
#include <net/9p/client.h>
-
-static struct p9_fid *p9_fid_create(struct p9_client *clnt);
-static void p9_fid_destroy(struct p9_fid *fid);
-static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu);
+#include <net/9p/transport.h>
+#include "protocol.h"
/*
* Client Option Parsing (code inspired by NFS code)
@@ -59,6 +56,9 @@ static const match_table_t tokens = {
{Opt_err, NULL},
};
+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
* @options: options string passed from mount
@@ -124,31 +124,585 @@ static int parse_opts(char *opts, struct p9_client *clnt)
return ret;
}
+/**
+ * p9_tag_alloc - lookup/allocate a request by tag
+ * @c: client session to lookup tag within
+ * @tag: numeric id for transaction
+ *
+ * this is a simple array lookup, but will grow the
+ * request_slots as necessary to accomodate transaction
+ * ids which did not previously have a slot.
+ *
+ * this code relies on the client spinlock to manage locks, its
+ * possible we should switch to something else, but I'd rather
+ * stick with something low-overhead for the common case.
+ *
+ */
+
+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 */
+ tag++;
+
+ if (tag >= c->max_tag) {
+ spin_lock_irqsave(&c->lock, flags);
+ /* check again since original check was outside of lock */
+ while (tag >= c->max_tag) {
+ row = (tag / P9_ROW_MAXTAG);
+ c->reqs[row] = kcalloc(P9_ROW_MAXTAG,
+ sizeof(struct p9_req_t), GFP_ATOMIC);
+
+ if (!c->reqs[row]) {
+ printk(KERN_ERR "Couldn't grow tag array\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ for (col = 0; col < P9_ROW_MAXTAG; col++) {
+ c->reqs[row][col].status = REQ_STATUS_IDLE;
+ c->reqs[row][col].tc = NULL;
+ }
+ c->max_tag += P9_ROW_MAXTAG;
+ }
+ spin_unlock_irqrestore(&c->lock, flags);
+ }
+ row = tag / P9_ROW_MAXTAG;
+ col = tag % P9_ROW_MAXTAG;
+
+ 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];
+}
+
+/**
+ * p9_tag_lookup - lookup a request by tag
+ * @c: client session to lookup tag within
+ * @tag: numeric id for transaction
+ *
+ */
+
+struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag)
+{
+ int row, col;
+
+ /* This looks up the original request by tag so we know which
+ * buffer to read the data into */
+ tag++;
+
+ BUG_ON(tag >= c->max_tag);
+
+ row = tag / P9_ROW_MAXTAG;
+ col = tag % P9_ROW_MAXTAG;
+
+ return &c->reqs[row][col];
+}
+EXPORT_SYMBOL(p9_tag_lookup);
+
+/**
+ * p9_tag_init - setup tags structure and contents
+ * @tags: tags structure from the client struct
+ *
+ * This initializes the tags structure for each client instance.
+ *
+ */
+
+static int p9_tag_init(struct p9_client *c)
+{
+ int err = 0;
+
+ c->tagpool = p9_idpool_create();
+ if (IS_ERR(c->tagpool)) {
+ err = PTR_ERR(c->tagpool);
+ c->tagpool = NULL;
+ goto error;
+ }
+
+ p9_idpool_get(c->tagpool); /* reserve tag 0 */
+
+ c->max_tag = 0;
+error:
+ return err;
+}
/**
- * p9_client_rpc - sends 9P request and waits until a response is available.
- * The function can be interrupted.
- * @c: client data
- * @tc: request to be sent
- * @rc: pointer where a pointer to the response is stored
+ * p9_tag_cleanup - cleans up tags structure and reclaims resources
+ * @tags: tags structure from the client struct
+ *
+ * This frees resources associated with the tags structure
+ *
*/
+static void p9_tag_cleanup(struct p9_client *c)
+{
+ int row, col;
+
+ /* check to insure all requests are idle */
+ for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
+ for (col = 0; col < P9_ROW_MAXTAG; col++) {
+ if (c->reqs[row][col].status != REQ_STATUS_IDLE) {
+ P9_DPRINTK(P9_DEBUG_MUX,
+ "Attempting to cleanup non-free tag %d,%d\n",
+ row, col);
+ /* TODO: delay execution of cleanup */
+ return;
+ }
+ }
+ }
+
+ if (c->tagpool)
+ p9_idpool_destroy(c->tagpool);
+
+ /* free requests associated with tags */
+ for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
+ 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_free_req - free a request and clean-up as necessary
+ * c: client state
+ * r: request to release
+ *
+ */
+
+static void p9_free_req(struct p9_client *c, struct p9_req_t *r)
+{
+ 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 (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->rc->id == P9_RFLUSH) {
+ kfree(r->tc);
+ kfree(r->rc);
+ }
+}
+
+/**
+ * p9_client_cb - call back from transport to client
+ * c: client state
+ * req: request received
+ *
+ */
+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, " tag %d\n", req->tc->tag);
+
+ if (req->status == REQ_STATUS_ERROR)
+ wake_up(req->wq);
+
+ 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->flush_tag);
+ if (other_req->status != REQ_STATUS_FLSH) /* stale flush */
+ spin_unlock_irqrestore(&c->lock, flags);
+ else {
+ 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: tag %d\n", req->tc->tag);
+ spin_lock_irqsave(&c->lock, flags);
+ if (req->status != REQ_STATUS_FLSHD)
+ req->status = REQ_STATUS_RCVD;
+ spin_unlock_irqrestore(&c->lock, flags);
+ wake_up(req->wq);
+ P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag);
+ }
+}
+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_client_rpc(struct p9_client *c, struct p9_fcall *tc,
- struct p9_fcall **rc)
+p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag,
+ int rewind)
{
- return c->trans->rpc(c->trans, tc, rc);
+ 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_9P, "<<< size=%d type: %d tag: %d\n", pdu->size,
+ pdu->id, pdu->tag);
+
+ 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
+ * @type: type of request
+ * @fmt: protocol format string (see protocol.c)
+ *
+ * Returns request structure (which client must free using p9_free_req)
+ */
+
+static struct p9_req_t *
+p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
+{
+ va_list ap;
+ int tag, err;
+ struct p9_req_t *req;
+ unsigned long flags;
+ int sigpending;
+ int flushed = 0;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type);
+
+ if (c->status != Connected)
+ return ERR_PTR(-EIO);
+
+ if (signal_pending(current)) {
+ sigpending = 1;
+ clear_thread_flag(TIF_SIGPENDING);
+ } else
+ sigpending = 0;
+
+ tag = P9_NOTAG;
+ if (type != P9_TVERSION) {
+ tag = p9_idpool_get(c->tagpool);
+ if (tag < 0)
+ return ERR_PTR(-ENOMEM);
+ }
+
+ req = p9_tag_alloc(c, tag);
+ if (IS_ERR(req))
+ return req;
+
+ /* 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) {
+ c->status = Disconnected;
+ goto reterr;
+ }
+
+ /* if it was a flush we just transmitted, return our tag */
+ if (type == P9_TFLUSH)
+ return req;
+again:
+ 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_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_ERROR, "req_status error %d\n", req->t_err);
+ err = req->t_err;
+ } else if (err == -ERESTARTSYS && flushed) {
+ P9_DPRINTK(P9_DEBUG_MUX, "flushed - going again\n");
+ goto again;
+ } else if (req->status == REQ_STATUS_FLSHD) {
+ P9_DPRINTK(P9_DEBUG_MUX, "flushed - erestartsys\n");
+ err = -ERESTARTSYS;
+ }
+
+ if ((err == -ERESTARTSYS) && (c->status == Connected) && (!flushed)) {
+ P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
+ spin_lock_irqsave(&c->lock, flags);
+ if (req->status == REQ_STATUS_SENT)
+ req->status = REQ_STATUS_FLSH;
+ spin_unlock_irqrestore(&c->lock, flags);
+ sigpending = 1;
+ flushed = 1;
+ clear_thread_flag(TIF_SIGPENDING);
+
+ if (c->trans_mod->cancel(c, req)) {
+ err = p9_client_flush(c, req);
+ if (err == 0)
+ goto again;
+ }
+ }
+
+ if (sigpending) {
+ spin_lock_irqsave(&current->sighand->siglock, flags);
+ recalc_sigpending();
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
+ }
+
+ if (err < 0)
+ 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;
+ }
+
+reterr:
+ P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type,
+ err);
+ p9_free_req(c, req);
+ return ERR_PTR(err);
+}
+
+static struct p9_fid *p9_fid_create(struct p9_client *clnt)
+{
+ int err;
+ struct p9_fid *fid;
+
+ P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt);
+ fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
+ if (!fid)
+ return ERR_PTR(-ENOMEM);
+
+ fid->fid = p9_idpool_get(clnt->fidpool);
+ if (fid->fid < 0) {
+ err = -ENOSPC;
+ goto error;
+ }
+
+ memset(&fid->qid, 0, sizeof(struct p9_qid));
+ fid->mode = -1;
+ fid->rdir_fpos = 0;
+ fid->uid = current->fsuid;
+ fid->clnt = clnt;
+ fid->aux = NULL;
+
+ spin_lock(&clnt->lock);
+ list_add(&fid->flist, &clnt->fidlist);
+ spin_unlock(&clnt->lock);
+
+ return fid;
+
+error:
+ kfree(fid);
+ return ERR_PTR(err);
+}
+
+static void p9_fid_destroy(struct p9_fid *fid)
+{
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid);
+ clnt = fid->clnt;
+ p9_idpool_put(fid->fid, clnt->fidpool);
+ spin_lock(&clnt->lock);
+ list_del(&fid->flist);
+ spin_unlock(&clnt->lock);
+ kfree(fid);
+}
+
+int p9_client_version(struct p9_client *c)
+{
+ int err = 0;
+ struct p9_req_t *req;
+ char *version;
+ int msize;
+
+ 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 = p9pdu_readf(req->rc, c->dotu, "ds", &msize, &version);
+ if (err) {
+ P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
+ p9pdu_dump(1, req->rc);
+ goto error;
+ }
+
+ 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 (msize < c->msize)
+ c->msize = msize;
+
+error:
+ kfree(version);
+ p9_free_req(c, req);
+
+ return err;
+}
+EXPORT_SYMBOL(p9_client_version);
struct p9_client *p9_client_create(const char *dev_name, char *options)
{
- int err, n;
+ int err;
struct p9_client *clnt;
- struct p9_fcall *tc, *rc;
- struct p9_str *version;
err = 0;
- tc = NULL;
- rc = NULL;
clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
if (!clnt)
return ERR_PTR(-ENOMEM);
@@ -164,6 +718,8 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
goto error;
}
+ p9_tag_init(clnt);
+
err = parse_opts(options, clnt);
if (err < 0)
goto error;
@@ -175,53 +731,23 @@ 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);
-
- clnt->trans = clnt->trans_mod->create(dev_name, options, clnt->msize,
- clnt->dotu);
- if (IS_ERR(clnt->trans)) {
- err = PTR_ERR(clnt->trans);
- clnt->trans = NULL;
+ err = clnt->trans_mod->create(clnt, dev_name, options);
+ if (err)
goto error;
- }
if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize)
clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ;
- tc = p9_create_tversion(clnt->msize, clnt->dotu?"9P2000.u":"9P2000");
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto error;
- }
-
- err = p9_client_rpc(clnt, tc, &rc);
+ err = p9_client_version(clnt);
if (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;
- else {
- err = -EREMOTEIO;
- goto error;
- }
-
- n = rc->params.rversion.msize;
- if (n < clnt->msize)
- clnt->msize = n;
-
- kfree(tc);
- kfree(rc);
return clnt;
error:
- kfree(tc);
- kfree(rc);
p9_client_destroy(clnt);
return ERR_PTR(err);
}
@@ -231,13 +757,10 @@ 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) {
- clnt->trans->close(clnt->trans);
- kfree(clnt->trans);
- clnt->trans = NULL;
- }
+ if (clnt->trans_mod)
+ clnt->trans_mod->close(clnt);
v9fs_put_trans(clnt->trans_mod);
@@ -247,6 +770,8 @@ void p9_client_destroy(struct p9_client *clnt)
if (clnt->fidpool)
p9_idpool_destroy(clnt->fidpool);
+ p9_tag_cleanup(clnt);
+
kfree(clnt);
}
EXPORT_SYMBOL(p9_client_destroy);
@@ -254,7 +779,7 @@ EXPORT_SYMBOL(p9_client_destroy);
void p9_client_disconnect(struct p9_client *clnt)
{
P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
- clnt->trans->status = Disconnected;
+ clnt->status = Disconnected;
}
EXPORT_SYMBOL(p9_client_disconnect);
@@ -262,14 +787,13 @@ 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)) {
@@ -278,73 +802,77 @@ 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) {
+ p9pdu_dump(1, req->rc);
+ p9_free_req(clnt, req);
goto error;
+ }
+
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n",
+ qid.type, qid.path, qid.version);
- memmove(&fid->qid, &rc->params.rattach.qid, sizeof(struct p9_qid));
- kfree(tc);
- kfree(rc);
+ 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) {
+ p9pdu_dump(1, req->rc);
+ 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);
@@ -353,15 +881,13 @@ 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);
@@ -375,53 +901,49 @@ 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);
+ err = p9pdu_readf(req->rc, clnt->dotu, "R", &nwqids, &wqids);
if (err) {
- if (rc && rc->id == P9_RWALK)
- goto clunk_fid;
- else
- goto error;
+ p9pdu_dump(1, req->rc);
+ p9_free_req(clnt, req);
+ goto clunk_fid;
}
+ p9_free_req(clnt, req);
- 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);
@@ -432,35 +954,39 @@ 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);
- if (err)
- goto done;
+ err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit);
+ if (err) {
+ p9pdu_dump(1, req->rc);
+ goto free_and_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);
+free_and_error:
+ p9_free_req(clnt, req);
+error:
return err;
}
EXPORT_SYMBOL(p9_client_open);
@@ -469,37 +995,41 @@ 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);
- if (err)
- goto done;
+ err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit);
+ if (err) {
+ p9pdu_dump(1, req->rc);
+ goto free_and_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);
+free_and_error:
+ p9_free_req(clnt, req);
+error:
return err;
}
EXPORT_SYMBOL(p9_client_fcreate);
@@ -507,31 +1037,25 @@ 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);
@@ -539,157 +1063,41 @@ 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);
- return err;
-}
-EXPORT_SYMBOL(p9_client_remove);
-
-int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count)
-{
- int err, n, rsize, total;
- struct p9_fcall *tc, *rc;
- struct p9_client *clnt;
-
- P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu %d\n", fid->fid,
- (long long unsigned) offset, count);
- err = 0;
- tc = NULL;
- rc = NULL;
- clnt = fid->clnt;
- total = 0;
-
- rsize = fid->iounit;
- if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
- rsize = clnt->msize - P9_IOHDRSZ;
-
- do {
- 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;
- }
-
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
- goto error;
-
- n = rc->params.rread.count;
- if (n > count)
- n = count;
-
- memmove(data, rc->params.rread.data, n);
- count -= n;
- data += n;
- offset += n;
- total += n;
- kfree(tc);
- tc = NULL;
- kfree(rc);
- rc = NULL;
- } while (count > 0 && n == rsize);
-
- return total;
-
error:
- kfree(tc);
- kfree(rc);
return err;
}
-EXPORT_SYMBOL(p9_client_read);
-
-int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count)
-{
- int err, n, rsize, total;
- struct p9_fcall *tc, *rc;
- struct p9_client *clnt;
-
- P9_DPRINTK(P9_DEBUG_9P, "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;
-
- rsize = fid->iounit;
- if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
- rsize = clnt->msize - P9_IOHDRSZ;
-
- do {
- if (count < rsize)
- rsize = count;
-
- tc = p9_create_twrite(fid->fid, offset, rsize, data);
- 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;
- data += n;
- offset += n;
- total += n;
- kfree(tc);
- tc = NULL;
- kfree(rc);
- rc = NULL;
- } while (count > 0);
-
- return total;
-
-error:
- kfree(tc);
- kfree(rc);
- return err;
-}
-EXPORT_SYMBOL(p9_client_write);
+EXPORT_SYMBOL(p9_client_remove);
int
-p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset, u32 count)
+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 count %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;
@@ -697,63 +1105,57 @@ p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset, u32 count)
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) {
+ p9pdu_dump(1, req->rc);
+ goto free_and_error;
+ }
+
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
- n = rc->params.rread.count;
- if (n > count)
- n = count;
+ if (data) {
+ memmove(data, dataptr, count);
+ data += count;
+ }
- err = copy_to_user(data, rc->params.rread.data, n);
+ if (udata) {
+ err = copy_to_user(udata, dataptr, count);
if (err) {
err = -EFAULT;
- goto error;
+ goto free_and_error;
}
+ }
- count -= n;
- data += 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_uread);
+EXPORT_SYMBOL(p9_client_read);
int
-p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset,
- u32 count)
+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;
@@ -761,325 +1163,114 @@ p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset,
if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
rsize = clnt->msize - P9_IOHDRSZ;
- do {
- if (count < rsize)
- rsize = count;
-
- tc = p9_create_twrite_u(fid->fid, offset, rsize, data);
- if (IS_ERR(tc)) {
- err = PTR_ERR(tc);
- tc = NULL;
- goto error;
- }
+ 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;
+ }
- err = p9_client_rpc(clnt, tc, &rc);
- if (err)
- goto error;
+ err = p9pdu_readf(req->rc, clnt->dotu, "d", &count);
+ if (err) {
+ p9pdu_dump(1, req->rc);
+ goto free_and_error;
+ }
- n = rc->params.rread.count;
- count -= n;
- data += n;
- offset += n;
- total += n;
- kfree(tc);
- tc = NULL;
- kfree(rc);
- rc = NULL;
- } while (count > 0);
+ 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_uwrite);
-
-int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count)
-{
- int n, total;
-
- P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
- (long long unsigned) offset, count);
- n = 0;
- total = 0;
- while (count) {
- n = p9_client_read(fid, data, offset, count);
- if (n <= 0)
- break;
-
- data += n;
- offset += n;
- count -= n;
- total += n;
- }
-
- if (n < 0)
- total = n;
-
- return total;
-}
-EXPORT_SYMBOL(p9_client_readn);
+EXPORT_SYMBOL(p9_client_write);
-struct p9_stat *p9_client_stat(struct p9_fid *fid)
+struct p9_wstat *p9_client_stat(struct p9_fid *fid)
{
int err;
- struct p9_fcall *tc, *rc;
struct p9_client *clnt;
- struct p9_stat *ret;
+ struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL);
+ struct p9_req_t *req;
+ u16 ignored;
+
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid);
+
+ if (!ret)
+ return ERR_PTR(-ENOMEM);
- 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);
- 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;
+ err = p9pdu_readf(req->rc, clnt->dotu, "wS", &ignored, ret);
+ if (err) {
+ ret = ERR_PTR(err);
+ p9pdu_dump(1, req->rc);
+ goto free_and_error;
}
- kfree(tc);
- kfree(rc);
- return ret;
-
+ P9_DPRINTK(P9_DEBUG_9P,
+ "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
+ "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
+ "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
+ "<<< uid=%d gid=%d n_muid=%d\n",
+ ret->size, ret->type, ret->dev, ret->qid.type,
+ ret->qid.path, ret->qid.version, ret->mode,
+ ret->atime, ret->mtime, ret->length, ret->name,
+ ret->uid, ret->gid, ret->muid, ret->extension,
+ ret->n_uid, ret->n_gid, ret->n_muid);
+
+free_and_error:
+ p9_free_req(clnt, req);
error:
- kfree(tc);
- kfree(rc);
- kfree(ret);
- return ERR_PTR(err);
+ return ret;
}
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);
+ P9_DPRINTK(P9_DEBUG_9P,
+ " sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
+ " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
+ " name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
+ " uid=%d gid=%d n_muid=%d\n",
+ wst->size, wst->type, wst->dev, wst->qid.type,
+ wst->qid.path, wst->qid.version, wst->mode,
+ wst->atime, wst->mtime, wst->length, wst->name,
+ wst->uid, wst->gid, wst->muid, wst->extension,
+ wst->n_uid, wst->n_gid, wst->n_muid);
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;
- }
-
- err = p9_client_rpc(clnt, tc, &rc);
-
-done:
- kfree(tc);
- kfree(rc);
- return err;
-}
-EXPORT_SYMBOL(p9_client_wstat);
-
-struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset)
-{
- int err, n, m;
- struct p9_fcall *tc, *rc;
- struct p9_client *clnt;
- struct p9_stat st, *ret;
-
- P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu\n", fid->fid,
- (long long unsigned) offset);
- err = 0;
- tc = NULL;
- rc = NULL;
- ret = NULL;
- clnt = fid->clnt;
-
- /* if the offset is below or above the current response, free it */
- if (offset < fid->rdir_fpos || (fid->rdir_fcall &&
- offset >= fid->rdir_fpos+fid->rdir_fcall->params.rread.count)) {
- fid->rdir_pos = 0;
- if (fid->rdir_fcall)
- fid->rdir_fpos += fid->rdir_fcall->params.rread.count;
-
- kfree(fid->rdir_fcall);
- fid->rdir_fcall = NULL;
- if (offset < fid->rdir_fpos)
- fid->rdir_fpos = 0;
- }
-
- if (!fid->rdir_fcall) {
- n = fid->iounit;
- if (!n || n > clnt->msize-P9_IOHDRSZ)
- n = clnt->msize - P9_IOHDRSZ;
-
- while (1) {
- if (fid->rdir_fcall) {
- fid->rdir_fpos +=
- fid->rdir_fcall->params.rread.count;
- kfree(fid->rdir_fcall);
- fid->rdir_fcall = NULL;
- }
-
- tc = p9_create_tread(fid->fid, fid->rdir_fpos, n);
- 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;
- if (n == 0)
- goto done;
-
- fid->rdir_fcall = rc;
- rc = NULL;
- if (offset >= fid->rdir_fpos &&
- offset < fid->rdir_fpos+n)
- break;
- }
-
- fid->rdir_pos = 0;
- }
-
- m = offset - fid->rdir_fpos;
- if (m < 0)
- goto done;
-
- n = p9_deserialize_stat(fid->rdir_fcall->params.rread.data + m,
- fid->rdir_fcall->params.rread.count - m, &st, clnt->dotu);
-
- if (!n) {
- err = -EIO;
- goto error;
- }
-
- fid->rdir_pos += n;
- st.size = n;
- ret = p9_clone_stat(&st, clnt->dotu);
- if (IS_ERR(ret)) {
- err = PTR_ERR(ret);
- ret = NULL;
- goto error;
- }
-
-done:
- kfree(tc);
- kfree(rc);
- return ret;
-
-error:
- kfree(tc);
- kfree(rc);
- kfree(ret);
- return ERR_PTR(err);
-}
-EXPORT_SYMBOL(p9_client_dirread);
-
-static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu)
-{
- 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;
-
- if (dotu)
- n += st->extension.len;
-
- 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;
-}
-
-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);
- fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
- if (!fid)
- return ERR_PTR(-ENOMEM);
-
- fid->fid = p9_idpool_get(clnt->fidpool);
- if (fid->fid < 0) {
- err = -ENOSPC;
+ req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, 0, wst);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
goto error;
}
- memset(&fid->qid, 0, sizeof(struct p9_qid));
- fid->mode = -1;
- fid->rdir_fpos = 0;
- fid->rdir_pos = 0;
- fid->rdir_fcall = NULL;
- fid->uid = current->fsuid;
- fid->clnt = clnt;
- fid->aux = NULL;
-
- spin_lock(&clnt->lock);
- list_add(&fid->flist, &clnt->fidlist);
- spin_unlock(&clnt->lock);
-
- return fid;
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid);
+ p9_free_req(clnt, req);
error:
- kfree(fid);
- return ERR_PTR(err);
-}
-
-static void p9_fid_destroy(struct p9_fid *fid)
-{
- struct p9_client *clnt;
-
- P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
- clnt = fid->clnt;
- p9_idpool_put(fid->fid, clnt->fidpool);
- spin_lock(&clnt->lock);
- list_del(&fid->flist);
- spin_unlock(&clnt->lock);
- kfree(fid->rdir_fcall);
- kfree(fid);
+ return err;
}
+EXPORT_SYMBOL(p9_client_wstat);
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-26 15:56:17 +0000