*
* This file contains functions assisting in mapping VFS to 9P2000
*
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
* This program is free software; you can redistribute it and/or modify
*
*/
-#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>
-
-#include "debug.h"
+#include <net/9p/9p.h>
+#include <net/9p/transport.h>
+#include <net/9p/client.h>
#include "v9fs.h"
-#include "9p.h"
#include "v9fs_vfs.h"
-#include "transport.h"
-#include "mux.h"
-
-/* TODO: sysfs or debugfs interface */
-int v9fs_debug_level = 0; /* feature-rific global debug level */
/*
* Option Parsing (code inspired by NFS code)
- *
+ * NOTE: each transport will parse its own options
*/
enum {
/* Options that take integer arguments */
- Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid, Opt_debug,
- Opt_rfdno, Opt_wfdno,
+ Opt_debug, Opt_dfltuid, Opt_dfltgid, Opt_afid,
/* String options */
- Opt_uname, Opt_remotename,
+ Opt_uname, Opt_remotename, Opt_trans,
/* Options that take no arguments */
- Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd,
+ Opt_nodevmap,
+ /* Cache options */
+ Opt_cache_loose,
+ /* Access options */
+ Opt_access,
/* Error token */
Opt_err
};
static match_table_t tokens = {
- {Opt_port, "port=%u"},
- {Opt_msize, "msize=%u"},
- {Opt_uid, "uid=%u"},
- {Opt_gid, "gid=%u"},
- {Opt_afid, "afid=%u"},
- {Opt_rfdno, "rfdno=%u"},
- {Opt_wfdno, "wfdno=%u"},
{Opt_debug, "debug=%x"},
+ {Opt_dfltuid, "dfltuid=%u"},
+ {Opt_dfltgid, "dfltgid=%u"},
+ {Opt_afid, "afid=%u"},
{Opt_uname, "uname=%s"},
{Opt_remotename, "aname=%s"},
- {Opt_unix, "proto=unix"},
- {Opt_tcp, "proto=tcp"},
- {Opt_fd, "proto=fd"},
- {Opt_tcp, "tcp"},
- {Opt_unix, "unix"},
- {Opt_fd, "fd"},
- {Opt_legacy, "noextend"},
{Opt_nodevmap, "nodevmap"},
+ {Opt_cache_loose, "cache=loose"},
+ {Opt_cache_loose, "loose"},
+ {Opt_access, "access=%s"},
{Opt_err, NULL}
};
-/*
- * Parse option string.
- */
-
/**
* v9fs_parse_options - parse mount options into session structure
* @options: options string passed from mount
*
*/
-static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
+static void v9fs_parse_options(struct v9fs_session_info *v9ses)
{
- char *p;
+ char *options;
substring_t args[MAX_OPT_ARGS];
- int option;
+ char *p;
+ int option = 0;
+ char *s, *e;
int ret;
/* setup defaults */
- v9ses->port = V9FS_PORT;
- v9ses->maxdata = 9000;
- v9ses->proto = PROTO_TCP;
- v9ses->extended = 1;
v9ses->afid = ~0;
v9ses->debug = 0;
- v9ses->rfdno = ~0;
- v9ses->wfdno = ~0;
+ v9ses->cache = 0;
- if (!options)
+ if (!v9ses->options)
return;
+ options = kstrdup(v9ses->options, GFP_KERNEL);
while ((p = strsep(&options, ",")) != NULL) {
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
if (token < Opt_uname) {
- if ((ret = match_int(&args[0], &option)) < 0) {
- dprintk(DEBUG_ERROR,
+ ret = match_int(&args[0], &option);
+ if (ret < 0) {
+ P9_DPRINTK(P9_DEBUG_ERROR,
"integer field, but no integer?\n");
continue;
}
-
}
switch (token) {
- case Opt_port:
- v9ses->port = option;
- break;
- case Opt_msize:
- v9ses->maxdata = option;
- break;
- case Opt_uid:
- v9ses->uid = option;
- break;
- case Opt_gid:
- v9ses->gid = option;
- break;
- case Opt_afid:
- v9ses->afid = option;
- break;
- case Opt_rfdno:
- v9ses->rfdno = option;
- break;
- case Opt_wfdno:
- v9ses->wfdno = option;
- break;
case Opt_debug:
v9ses->debug = option;
+#ifdef CONFIG_NET_9P_DEBUG
+ p9_debug_level = option;
+#endif
break;
- case Opt_tcp:
- v9ses->proto = PROTO_TCP;
+
+ case Opt_dfltuid:
+ v9ses->dfltuid = option;
break;
- case Opt_unix:
- v9ses->proto = PROTO_UNIX;
+ case Opt_dfltgid:
+ v9ses->dfltgid = option;
break;
- case Opt_fd:
- v9ses->proto = PROTO_FD;
+ case Opt_afid:
+ v9ses->afid = option;
break;
case Opt_uname:
- match_strcpy(v9ses->name, &args[0]);
+ match_strcpy(v9ses->uname, &args[0]);
break;
case Opt_remotename:
- match_strcpy(v9ses->remotename, &args[0]);
- break;
- case Opt_legacy:
- v9ses->extended = 0;
+ match_strcpy(v9ses->aname, &args[0]);
break;
case Opt_nodevmap:
v9ses->nodev = 1;
break;
+ case Opt_cache_loose:
+ v9ses->cache = CACHE_LOOSE;
+ break;
+
+ case Opt_access:
+ s = match_strdup(&args[0]);
+ v9ses->flags &= ~V9FS_ACCESS_MASK;
+ if (strcmp(s, "user") == 0)
+ v9ses->flags |= V9FS_ACCESS_USER;
+ else if (strcmp(s, "any") == 0)
+ v9ses->flags |= V9FS_ACCESS_ANY;
+ else {
+ v9ses->flags |= V9FS_ACCESS_SINGLE;
+ v9ses->uid = simple_strtol(s, &e, 10);
+ if (*e != '\0')
+ v9ses->uid = ~0;
+ }
+ kfree(s);
+ break;
+
default:
continue;
}
}
-}
-
-/**
- * v9fs_inode2v9ses - safely extract v9fs session info from super block
- * @inode: inode to extract information from
- *
- * Paranoid function to extract v9ses information from superblock,
- * if anything is missing it will report an error.
- *
- */
-
-struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
-{
- return (inode->i_sb->s_fs_info);
-}
-
-/**
- * v9fs_get_idpool - allocate numeric id from pool
- * @p - pool to allocate from
- *
- * XXX - This seems to be an awful generic function, should it be in idr.c with
- * the lock included in struct idr?
- */
-
-int v9fs_get_idpool(struct v9fs_idpool *p)
-{
- int i = 0;
- int error;
-
-retry:
- if (idr_pre_get(&p->pool, GFP_KERNEL) == 0)
- return 0;
-
- if (down_interruptible(&p->lock) == -EINTR) {
- eprintk(KERN_WARNING, "Interrupted while locking\n");
- return -1;
- }
-
- /* 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)
- goto retry;
- else if (error)
- return -1;
-
- return i;
-}
-
-/**
- * v9fs_put_idpool - release numeric id from pool
- * @p - pool to allocate from
- *
- * XXX - This seems to be an awful generic function, should it be in idr.c with
- * the lock included in struct idr?
- */
-
-void v9fs_put_idpool(int id, struct v9fs_idpool *p)
-{
- if (down_interruptible(&p->lock) == -EINTR) {
- eprintk(KERN_WARNING, "Interrupted while locking\n");
- return;
- }
- idr_remove(&p->pool, id);
- up(&p->lock);
-}
-
-/**
- * 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;
+ kfree(options);
}
/**
*
*/
-int
-v9fs_session_init(struct v9fs_session_info *v9ses,
+struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
const char *dev_name, char *data)
{
- struct v9fs_fcall *fcall = NULL;
- struct v9fs_transport *trans_proto;
- int n = 0;
- int newfid = -1;
int retval = -EINVAL;
- struct v9fs_str *version;
-
- v9ses->name = __getname();
- if (!v9ses->name)
- return -ENOMEM;
+ struct p9_fid *fid;
- v9ses->remotename = __getname();
- if (!v9ses->remotename) {
- __putname(v9ses->name);
- return -ENOMEM;
- }
+ v9ses->uname = __getname();
+ if (!v9ses->uname)
+ return ERR_PTR(-ENOMEM);
- strcpy(v9ses->name, V9FS_DEFUSER);
- strcpy(v9ses->remotename, V9FS_DEFANAME);
-
- v9fs_parse_options(data, v9ses);
-
- /* set global debug level */
- v9fs_debug_level = v9ses->debug;
-
- /* id pools that are session-dependent: fids and tags */
- idr_init(&v9ses->fidpool.pool);
- init_MUTEX(&v9ses->fidpool.lock);
-
- switch (v9ses->proto) {
- case PROTO_TCP:
- trans_proto = &v9fs_trans_tcp;
- break;
- case PROTO_UNIX:
- trans_proto = &v9fs_trans_unix;
- *v9ses->remotename = 0;
- break;
- case PROTO_FD:
- trans_proto = &v9fs_trans_fd;
- *v9ses->remotename = 0;
- break;
- default:
- printk(KERN_ERR "v9fs: Bad mount protocol %d\n", v9ses->proto);
- retval = -ENOPROTOOPT;
- goto SessCleanUp;
- };
-
- v9ses->transport = kmalloc(sizeof(*v9ses->transport), GFP_KERNEL);
- if (!v9ses->transport) {
- retval = -ENOMEM;
- goto SessCleanUp;
+ v9ses->aname = __getname();
+ if (!v9ses->aname) {
+ __putname(v9ses->uname);
+ return ERR_PTR(-ENOMEM);
}
- memmove(v9ses->transport, trans_proto, sizeof(*v9ses->transport));
-
- if ((retval = v9ses->transport->init(v9ses, dev_name, data)) < 0) {
- eprintk(KERN_ERR, "problem initializing transport\n");
- goto SessCleanUp;
+ v9ses->flags = V9FS_EXTENDED | V9FS_ACCESS_USER;
+ strcpy(v9ses->uname, V9FS_DEFUSER);
+ strcpy(v9ses->aname, V9FS_DEFANAME);
+ v9ses->uid = ~0;
+ v9ses->dfltuid = V9FS_DEFUID;
+ v9ses->dfltgid = V9FS_DEFGID;
+ v9ses->options = kstrdup(data, GFP_KERNEL);
+ v9fs_parse_options(v9ses);
+
+ v9ses->clnt = p9_client_create(dev_name, v9ses->options);
+
+ if (IS_ERR(v9ses->clnt)) {
+ retval = PTR_ERR(v9ses->clnt);
+ v9ses->clnt = NULL;
+ P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n");
+ goto error;
}
- v9ses->inprogress = 0;
- v9ses->shutdown = 0;
- v9ses->session_hung = 0;
-
- v9ses->mux = v9fs_mux_init(v9ses->transport, v9ses->maxdata + V9FS_IOHDRSZ,
- &v9ses->extended);
+ if (!v9ses->clnt->dotu)
+ v9ses->flags &= ~V9FS_EXTENDED;
- if (IS_ERR(v9ses->mux)) {
- retval = PTR_ERR(v9ses->mux);
- v9ses->mux = NULL;
- dprintk(DEBUG_ERROR, "problem initializing mux\n");
- goto SessCleanUp;
- }
+ v9ses->maxdata = v9ses->clnt->msize;
- if (v9ses->afid == ~0) {
- if (v9ses->extended)
- retval =
- v9fs_t_version(v9ses, v9ses->maxdata, "9P2000.u",
- &fcall);
- else
- retval = v9fs_t_version(v9ses, v9ses->maxdata, "9P2000",
- &fcall);
-
- if (retval < 0) {
- dprintk(DEBUG_ERROR, "v9fs_t_version failed\n");
- goto FreeFcall;
- }
+ /* for legacy mode, fall back to V9FS_ACCESS_ANY */
+ if (!v9fs_extended(v9ses) &&
+ ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
- 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 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;
- kfree(fcall);
-
- if (n < v9ses->maxdata)
- v9ses->maxdata = n;
+ v9ses->flags &= ~V9FS_ACCESS_MASK;
+ v9ses->flags |= V9FS_ACCESS_ANY;
+ v9ses->uid = ~0;
}
- newfid = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
- eprintk(KERN_WARNING, "couldn't allocate FID\n");
- retval = -ENOMEM;
- goto SessCleanUp;
- }
- /* it is a little bit ugly, but we have to prevent newfid */
- /* being the same as afid, so if it is, get a new fid */
- if (v9ses->afid != ~0 && newfid == v9ses->afid) {
- newfid = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
- eprintk(KERN_WARNING, "couldn't allocate FID\n");
- retval = -ENOMEM;
- goto SessCleanUp;
- }
+ fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, ~0,
+ v9ses->aname);
+ if (IS_ERR(fid)) {
+ retval = PTR_ERR(fid);
+ fid = NULL;
+ P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n");
+ goto error;
}
- if ((retval =
- v9fs_t_attach(v9ses, v9ses->name, v9ses->remotename, newfid,
- v9ses->afid, NULL))
- < 0) {
- dprintk(DEBUG_ERROR, "cannot attach\n");
- goto SessCleanUp;
- }
+ if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE)
+ fid->uid = v9ses->uid;
+ else
+ fid->uid = ~0;
- if (v9ses->afid != ~0) {
- dprintk(DEBUG_ERROR, "afid not equal to ~0\n");
- if (v9fs_t_clunk(v9ses, v9ses->afid))
- dprintk(DEBUG_ERROR, "clunk failed\n");
- }
-
- return newfid;
-
- FreeFcall:
- kfree(fcall);
+ return fid;
- SessCleanUp:
+error:
v9fs_session_close(v9ses);
- return retval;
+ return ERR_PTR(retval);
}
/**
void v9fs_session_close(struct v9fs_session_info *v9ses)
{
- if (v9ses->mux) {
- v9fs_mux_destroy(v9ses->mux);
- v9ses->mux = NULL;
- }
-
- if (v9ses->transport) {
- v9ses->transport->close(v9ses->transport);
- kfree(v9ses->transport);
- v9ses->transport = NULL;
+ if (v9ses->clnt) {
+ p9_client_destroy(v9ses->clnt);
+ v9ses->clnt = NULL;
}
- __putname(v9ses->name);
- __putname(v9ses->remotename);
+ __putname(v9ses->uname);
+ __putname(v9ses->aname);
+ kfree(v9ses->options);
}
/**
* 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(v9ses->mux, -EIO);
+ P9_DPRINTK(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
+ p9_client_disconnect(v9ses->clnt);
}
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");
-
- ret = v9fs_mux_global_init();
- if (!ret)
- ret = register_filesystem(&v9fs_fs_type);
-
- return ret;
+ printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
+ /* TODO: Setup list of registered trasnport modules */
+ return register_filesystem(&v9fs_fs_type);
}
/**
static void __exit exit_v9fs(void)
{
- v9fs_mux_global_exit();
unregister_filesystem(&v9fs_fs_type);
}
module_init(init_v9fs)
module_exit(exit_v9fs)
+MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
MODULE_LICENSE("GPL");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff