diff options
author | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
---|---|---|
committer | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
commit | fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 (patch) | |
tree | 22962a4387943edc841c72a4e636a068c66d58fd /net/9p/mod.c | |
download | ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.zip ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.tar.gz |
Initial import of modified Linux 2.6.28 tree
Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y
Diffstat (limited to 'net/9p/mod.c')
-rw-r--r-- | net/9p/mod.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/net/9p/mod.c b/net/9p/mod.c new file mode 100644 index 0000000..cf8a412 --- /dev/null +++ b/net/9p/mod.c @@ -0,0 +1,174 @@ +/* + * net/9p/9p.c + * + * 9P entry point + * + * Copyright (C) 2007 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> + * + * This program is free software; you can redistribute it and/or modify + * 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 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <net/9p/9p.h> +#include <linux/fs.h> +#include <linux/parser.h> +#include <net/9p/client.h> +#include <net/9p/transport.h> +#include <linux/list.h> +#include <linux/spinlock.h> + +#ifdef CONFIG_NET_9P_DEBUG +unsigned int p9_debug_level = 0; /* feature-rific global debug level */ +EXPORT_SYMBOL(p9_debug_level); +module_param_named(debug, p9_debug_level, uint, 0); +MODULE_PARM_DESC(debug, "9P debugging level"); +#endif + +/* + * Dynamic Transport Registration Routines + * + */ + +static DEFINE_SPINLOCK(v9fs_trans_lock); +static LIST_HEAD(v9fs_trans_list); + +/** + * v9fs_register_trans - register a new transport with 9p + * @m: structure describing the transport module and entry points + * + */ +void v9fs_register_trans(struct p9_trans_module *m) +{ + spin_lock(&v9fs_trans_lock); + list_add_tail(&m->list, &v9fs_trans_list); + spin_unlock(&v9fs_trans_lock); +} +EXPORT_SYMBOL(v9fs_register_trans); + +/** + * v9fs_unregister_trans - unregister a 9p transport + * @m: the transport to remove + * + */ +void v9fs_unregister_trans(struct p9_trans_module *m) +{ + spin_lock(&v9fs_trans_lock); + list_del_init(&m->list); + spin_unlock(&v9fs_trans_lock); +} +EXPORT_SYMBOL(v9fs_unregister_trans); + +/** + * v9fs_get_trans_by_name - get transport with the matching name + * @name: string identifying transport + * + */ +struct p9_trans_module *v9fs_get_trans_by_name(const substring_t *name) +{ + struct p9_trans_module *t, *found = NULL; + + spin_lock(&v9fs_trans_lock); + + list_for_each_entry(t, &v9fs_trans_list, list) + if (strncmp(t->name, name->from, name->to-name->from) == 0 && + try_module_get(t->owner)) { + found = t; + break; + } + + spin_unlock(&v9fs_trans_lock); + return found; +} +EXPORT_SYMBOL(v9fs_get_trans_by_name); + +/** + * v9fs_get_default_trans - get the default transport + * + */ + +struct p9_trans_module *v9fs_get_default_trans(void) +{ + struct p9_trans_module *t, *found = NULL; + + spin_lock(&v9fs_trans_lock); + + list_for_each_entry(t, &v9fs_trans_list, list) + if (t->def && try_module_get(t->owner)) { + found = t; + break; + } + + if (!found) + list_for_each_entry(t, &v9fs_trans_list, list) + if (try_module_get(t->owner)) { + found = t; + break; + } + + spin_unlock(&v9fs_trans_lock); + return found; +} +EXPORT_SYMBOL(v9fs_get_default_trans); + +/** + * v9fs_put_trans - put trans + * @m: transport to put + * + */ +void v9fs_put_trans(struct p9_trans_module *m) +{ + if (m) + module_put(m->owner); +} + +/** + * v9fs_init - Initialize module + * + */ +static int __init init_p9(void) +{ + int ret = 0; + + p9_error_init(); + printk(KERN_INFO "Installing 9P2000 support\n"); + p9_trans_fd_init(); + + return ret; +} + +/** + * v9fs_init - shutdown module + * + */ + +static void __exit exit_p9(void) +{ + printk(KERN_INFO "Unloading 9P2000 support\n"); + + p9_trans_fd_exit(); +} + +module_init(init_p9) +module_exit(exit_p9) + +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"); |