9p: make struct v9fs_cached_file_operations static
[linux-2.6.git] / fs / 9p / v9fs.c
index 418c374..6ad6f19 100644 (file)
@@ -7,9 +7,8 @@
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
  *
  *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
+#include <linux/sched.h>
 #include <linux/parser.h>
 #include <linux/idr.h>
 
@@ -37,7 +36,6 @@
 #include "v9fs_vfs.h"
 #include "transport.h"
 #include "mux.h"
-#include "conv.h"
 
 /* TODO: sysfs or debugfs interface */
 int v9fs_debug_level = 0;      /* feature-rific global debug level  */
@@ -52,9 +50,11 @@ enum {
        Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid, Opt_debug,
        Opt_rfdno, Opt_wfdno,
        /* String options */
-       Opt_name, Opt_remotename,
+       Opt_uname, Opt_remotename,
        /* Options that take no arguments */
        Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd,
+       /* Cache options */
+       Opt_cache_loose,
        /* Error token */
        Opt_err
 };
@@ -67,8 +67,8 @@ static match_table_t tokens = {
        {Opt_afid, "afid=%u"},
        {Opt_rfdno, "rfdno=%u"},
        {Opt_wfdno, "wfdno=%u"},
-       {Opt_debug, "debug=%u"},
-       {Opt_name, "name=%s"},
+       {Opt_debug, "debug=%x"},
+       {Opt_uname, "uname=%s"},
        {Opt_remotename, "aname=%s"},
        {Opt_unix, "proto=unix"},
        {Opt_tcp, "proto=tcp"},
@@ -78,6 +78,8 @@ static match_table_t tokens = {
        {Opt_fd, "fd"},
        {Opt_legacy, "noextend"},
        {Opt_nodevmap, "nodevmap"},
+       {Opt_cache_loose, "cache=loose"},
+       {Opt_cache_loose, "loose"},
        {Opt_err, NULL}
 };
 
@@ -108,6 +110,7 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
        v9ses->debug = 0;
        v9ses->rfdno = ~0;
        v9ses->wfdno = ~0;
+       v9ses->cache = 0;
 
        if (!options)
                return;
@@ -117,13 +120,12 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
                if (!*p)
                        continue;
                token = match_token(p, tokens, args);
-               if (token < Opt_name) {
+               if (token < Opt_uname) {
                        if ((ret = match_int(&args[0], &option)) < 0) {
                                dprintk(DEBUG_ERROR,
                                        "integer field, but no integer?\n");
                                continue;
                        }
-
                }
                switch (token) {
                case Opt_port:
@@ -159,7 +161,7 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
                case Opt_fd:
                        v9ses->proto = PROTO_FD;
                        break;
-               case Opt_name:
+               case Opt_uname:
                        match_strcpy(v9ses->name, &args[0]);
                        break;
                case Opt_remotename:
@@ -171,6 +173,9 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
                case Opt_nodevmap:
                        v9ses->nodev = 1;
                        break;
+               case Opt_cache_loose:
+                       v9ses->cache = CACHE_LOOSE;
+                       break;
                default:
                        continue;
                }
@@ -213,7 +218,8 @@ retry:
                return -1;
        }
 
-       error = idr_get_new(&p->pool, NULL, &i);
+       /* no need to store exactly p, we just need something non-null */
+       error = idr_get_new(&p->pool, p, &i);
        up(&p->lock);
 
        if (error == -EAGAIN)
@@ -243,6 +249,16 @@ void v9fs_put_idpool(int id, struct v9fs_idpool *p)
 }
 
 /**
+ * v9fs_check_idpool - check if the specified id is available
+ * @id - id to check
+ * @p - pool
+ */
+int v9fs_check_idpool(int id, struct v9fs_idpool *p)
+{
+       return idr_find(&p->pool, id) != NULL;
+}
+
+/**
  * v9fs_session_init - initialize session
  * @v9ses: session information structure
  * @dev_name: device being mounted
@@ -259,6 +275,7 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
        int n = 0;
        int newfid = -1;
        int retval = -EINVAL;
+       struct v9fs_str *version;
 
        v9ses->name = __getname();
        if (!v9ses->name)
@@ -278,12 +295,9 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
        /* set global debug level */
        v9fs_debug_level = v9ses->debug;
 
-       /* id pools that are session-dependent: FIDs and TIDs */
+       /* id pools that are session-dependent: fids and tags */
        idr_init(&v9ses->fidpool.pool);
        init_MUTEX(&v9ses->fidpool.lock);
-       idr_init(&v9ses->tidpool.pool);
-       init_MUTEX(&v9ses->tidpool.lock);
-
 
        switch (v9ses->proto) {
        case PROTO_TCP:
@@ -320,7 +334,12 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
        v9ses->shutdown = 0;
        v9ses->session_hung = 0;
 
-       if ((retval = v9fs_mux_init(v9ses, dev_name)) < 0) {
+       v9ses->mux = v9fs_mux_init(v9ses->transport, v9ses->maxdata + V9FS_IOHDRSZ,
+               &v9ses->extended);
+
+       if (IS_ERR(v9ses->mux)) {
+               retval = PTR_ERR(v9ses->mux);
+               v9ses->mux = NULL;
                dprintk(DEBUG_ERROR, "problem initializing mux\n");
                goto SessCleanUp;
        }
@@ -339,13 +358,16 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
                        goto FreeFcall;
                }
 
-               /* Really should check for 9P1 and report error */
-               if (!strcmp(fcall->params.rversion.version, "9P2000.u")) {
+               version = &fcall->params.rversion.version;
+               if (version->len==8 && !memcmp(version->str, "9P2000.u", 8)) {
                        dprintk(DEBUG_9P, "9P2000 UNIX extensions enabled\n");
                        v9ses->extended = 1;
-               } else {
+               } else if (version->len==6 && !memcmp(version->str, "9P2000", 6)) {
                        dprintk(DEBUG_9P, "9P2000 legacy mode enabled\n");
                        v9ses->extended = 0;
+               } else {
+                       retval = -EREMOTEIO;
+                       goto FreeFcall;
                }
 
                n = fcall->params.rversion.msize;
@@ -381,7 +403,8 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
        }
 
        if (v9ses->afid != ~0) {
-               if (v9fs_t_clunk(v9ses, v9ses->afid, NULL))
+               dprintk(DEBUG_ERROR, "afid not equal to ~0\n");
+               if (v9fs_t_clunk(v9ses, v9ses->afid))
                        dprintk(DEBUG_ERROR, "clunk failed\n");
        }
 
@@ -403,13 +426,16 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
 
 void v9fs_session_close(struct v9fs_session_info *v9ses)
 {
-       if (v9ses->recvproc) {
-               send_sig(SIGKILL, v9ses->recvproc, 1);
-               wait_for_completion(&v9ses->proccmpl);
+       if (v9ses->mux) {
+               v9fs_mux_destroy(v9ses->mux);
+               v9ses->mux = NULL;
        }
 
-       if (v9ses->transport)
+       if (v9ses->transport) {
                v9ses->transport->close(v9ses->transport);
+               kfree(v9ses->transport);
+               v9ses->transport = NULL;
+       }
 
        __putname(v9ses->name);
        __putname(v9ses->remotename);
@@ -420,8 +446,9 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
  *     and cancel all pending requests.
  */
 void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
+       dprintk(DEBUG_ERROR, "cancel session %p\n", v9ses);
        v9ses->transport->status = Disconnected;
-       v9fs_mux_cancel_requests(v9ses, -EIO);
+       v9fs_mux_cancel(v9ses->mux, -EIO);
 }
 
 extern int v9fs_error_init(void);
@@ -433,11 +460,24 @@ extern int v9fs_error_init(void);
 
 static int __init init_v9fs(void)
 {
+       int ret;
+
        v9fs_error_init();
 
-       printk(KERN_INFO "Installing v9fs 9P2000 file system support\n");
+       printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
+
+       ret = v9fs_mux_global_init();
+       if (ret) {
+               printk(KERN_WARNING "v9fs: starting mux failed\n");
+               return ret;
+       }
+       ret = register_filesystem(&v9fs_fs_type);
+       if (ret) {
+               printk(KERN_WARNING "v9fs: registering file system failed\n");
+               v9fs_mux_global_exit();
+       }
 
-       return register_filesystem(&v9fs_fs_type);
+       return ret;
 }
 
 /**
@@ -447,6 +487,7 @@ static int __init init_v9fs(void)
 
 static void __exit exit_v9fs(void)
 {
+       v9fs_mux_global_exit();
        unregister_filesystem(&v9fs_fs_type);
 }