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-rw-r--r--fs/9p/9p.c302
1 files changed, 176 insertions, 126 deletions
diff --git a/fs/9p/9p.c b/fs/9p/9p.c
index a3a1ac61072..dc3ce44ec83 100644
--- a/fs/9p/9p.c
+++ b/fs/9p/9p.c
@@ -1,8 +1,9 @@
/*
* linux/fs/9p/9p.c
*
- * This file contains functions 9P2000 functions
+ * This file contains functions to perform synchronous 9P calls
*
+ * Copyright (C) 2004 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
@@ -33,6 +34,7 @@
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
+#include "conv.h"
#include "mux.h"
/**
@@ -46,17 +48,21 @@
int
v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
- char *version, struct v9fs_fcall **fcall)
+ char *version, struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "msize: %d version: %s\n", msize, version);
- msg.id = TVERSION;
- msg.tag = ~0;
- msg.params.tversion.msize = msize;
- msg.params.tversion.version = version;
+ tc = v9fs_create_tversion(msize, version);
- return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
/**
@@ -72,19 +78,23 @@ v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
int
v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
- u32 fid, u32 afid, struct v9fs_fcall **fcall)
+ u32 fid, u32 afid, struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall* tc;
dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname,
aname, fid, afid);
- msg.id = TATTACH;
- msg.params.tattach.fid = fid;
- msg.params.tattach.afid = afid;
- msg.params.tattach.uname = uname;
- msg.params.tattach.aname = aname;
- return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
+ ret = -ENOMEM;
+ tc = v9fs_create_tattach(fid, afid, uname, aname);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
@@ -117,24 +127,28 @@ static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
* @fcall: pointer to response fcall pointer
*
*/
+
int
v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
{
- int err;
+ int ret;
struct v9fs_fcall *tc, *rc;
- tc = kmalloc(sizeof(struct v9fs_fcall), GFP_KERNEL);
-
dprintk(DEBUG_9P, "fid %d\n", fid);
- tc->id = TCLUNK;
- tc->params.tclunk.fid = fid;
- err = v9fs_mux_rpc(v9ses->mux, tc, &rc);
- if (err >= 0) {
- v9fs_t_clunk_cb(v9ses, tc, rc, 0);
- }
+ ret = -ENOMEM;
+ rc = NULL;
+ tc = v9fs_create_tclunk(fid);
+ if (!IS_ERR(tc))
+ ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
+ else
+ ret = PTR_ERR(tc);
+
+ if (ret)
+ dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret);
- return err;
+ v9fs_t_clunk_cb(v9ses, tc, rc, ret);
+ return ret;
}
/**
@@ -144,14 +158,22 @@ v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
*
*/
-int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 tag)
+int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall *tc;
- dprintk(DEBUG_9P, "oldtag %d\n", tag);
- msg.id = TFLUSH;
- msg.params.tflush.oldtag = tag;
- return v9fs_mux_rpc(v9ses->mux, &msg, NULL);
+ dprintk(DEBUG_9P, "oldtag %d\n", oldtag);
+
+ ret = -ENOMEM;
+ tc = v9fs_create_tflush(oldtag);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, NULL);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
/**
@@ -163,17 +185,22 @@ int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 tag)
*/
int
-v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **fcall)
+v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d\n", fid);
- if (fcall)
- *fcall = NULL;
- msg.id = TSTAT;
- msg.params.tstat.fid = fid;
- return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
+ ret = -ENOMEM;
+ tc = v9fs_create_tstat(fid);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
/**
@@ -187,16 +214,22 @@ v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **fcall)
int
v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_stat *stat, struct v9fs_fcall **fcall)
+ struct v9fs_wstat *wstat, struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall *tc;
- dprintk(DEBUG_9P, "fid %d length %d\n", fid, (int)stat->length);
- msg.id = TWSTAT;
- msg.params.twstat.fid = fid;
- msg.params.twstat.stat = stat;
+ dprintk(DEBUG_9P, "fid %d\n", fid);
+
+ ret = -ENOMEM;
+ tc = v9fs_create_twstat(fid, wstat, v9ses->extended);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
- return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
+ return ret;
}
/**
@@ -213,23 +246,28 @@ v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
int
v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
- char *name, struct v9fs_fcall **fcall)
+ char *name, struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall *tc;
+ int nwname;
dprintk(DEBUG_9P, "fid %d newfid %d wname '%s'\n", fid, newfid, name);
- msg.id = TWALK;
- msg.params.twalk.fid = fid;
- msg.params.twalk.newfid = newfid;
-
- if (name) {
- msg.params.twalk.nwname = 1;
- msg.params.twalk.wnames = &name;
- } else {
- msg.params.twalk.nwname = 0;
- }
-
- return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
+
+ if (name)
+ nwname = 1;
+ else
+ nwname = 0;
+
+ ret = -ENOMEM;
+ tc = v9fs_create_twalk(fid, newfid, nwname, &name);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
/**
@@ -244,19 +282,22 @@ v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
int
v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
- struct v9fs_fcall **fcall)
+ struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
- int errorno = -1;
+ int ret;
+ struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode);
- msg.id = TOPEN;
- msg.params.topen.fid = fid;
- msg.params.topen.mode = mode;
- errorno = v9fs_mux_rpc(v9ses->mux, &msg, fcall);
+ ret = -ENOMEM;
+ tc = v9fs_create_topen(fid, mode);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
- return errorno;
+ return ret;
}
/**
@@ -269,14 +310,22 @@ v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
int
v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_fcall **fcall)
+ struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d\n", fid);
- msg.id = TREMOVE;
- msg.params.tremove.fid = fid;
- return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
+
+ ret = -ENOMEM;
+ tc = v9fs_create_tremove(fid);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
/**
@@ -292,20 +341,23 @@ v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
int
v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
- u32 perm, u8 mode, struct v9fs_fcall **fcall)
+ u32 perm, u8 mode, struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
+ int ret;
+ struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n",
fid, name, perm, mode);
- msg.id = TCREATE;
- msg.params.tcreate.fid = fid;
- msg.params.tcreate.name = name;
- msg.params.tcreate.perm = perm;
- msg.params.tcreate.mode = mode;
+ ret = -ENOMEM;
+ tc = v9fs_create_tcreate(fid, name, perm, mode);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
- return v9fs_mux_rpc(v9ses->mux, &msg, fcall);
+ return ret;
}
/**
@@ -320,31 +372,30 @@ v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
int
v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
- u32 count, struct v9fs_fcall **fcall)
+ u32 count, struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
- struct v9fs_fcall *rc = NULL;
- long errorno = -1;
-
- dprintk(DEBUG_9P, "fid %d offset 0x%lx count 0x%x\n", fid,
- (long unsigned int)offset, count);
- msg.id = TREAD;
- msg.params.tread.fid = fid;
- msg.params.tread.offset = offset;
- msg.params.tread.count = count;
- errorno = v9fs_mux_rpc(v9ses->mux, &msg, &rc);
-
- if (!errorno) {
- errorno = rc->params.rread.count;
- dump_data(rc->params.rread.data, rc->params.rread.count);
- }
-
- if (fcall)
- *fcall = rc;
- else
- kfree(rc);
+ int ret;
+ struct v9fs_fcall *tc, *rc;
- return errorno;
+ dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
+ (long long unsigned) offset, count);
+
+ ret = -ENOMEM;
+ tc = v9fs_create_tread(fid, offset, count);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
+ if (!ret)
+ ret = rc->params.rread.count;
+ if (rcp)
+ *rcp = rc;
+ else
+ kfree(rc);
+
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
+
+ return ret;
}
/**
@@ -358,32 +409,31 @@ v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
*/
int
-v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid,
- u64 offset, u32 count, void *data, struct v9fs_fcall **fcall)
+v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count,
+ const char __user *data, struct v9fs_fcall **rcp)
{
- struct v9fs_fcall msg;
- struct v9fs_fcall *rc = NULL;
- long errorno = -1;
+ int ret;
+ struct v9fs_fcall *tc, *rc;
- dprintk(DEBUG_9P, "fid %d offset 0x%llx count 0x%x\n", fid,
- (unsigned long long)offset, count);
- dump_data(data, count);
+ dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
+ (long long unsigned) offset, count);
- msg.id = TWRITE;
- msg.params.twrite.fid = fid;
- msg.params.twrite.offset = offset;
- msg.params.twrite.count = count;
- msg.params.twrite.data = data;
+ ret = -ENOMEM;
+ tc = v9fs_create_twrite(fid, offset, count, data);
+ if (!IS_ERR(tc)) {
+ ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
- errorno = v9fs_mux_rpc(v9ses->mux, &msg, &rc);
+ if (!ret)
+ ret = rc->params.rwrite.count;
+ if (rcp)
+ *rcp = rc;
+ else
+ kfree(rc);
- if (!errorno)
- errorno = rc->params.rwrite.count;
+ kfree(tc);
+ } else
+ ret = PTR_ERR(tc);
- if (fcall)
- *fcall = rc;
- else
- kfree(rc);
-
- return errorno;
+ return ret;
}
+
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