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-rw-r--r--fs/gfs2/locking.c232
1 files changed, 0 insertions, 232 deletions
diff --git a/fs/gfs2/locking.c b/fs/gfs2/locking.c
deleted file mode 100644
index 523243a..0000000
--- a/fs/gfs2/locking.c
+++ /dev/null
@@ -1,232 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/wait.h>
-#include <linux/sched.h>
-#include <linux/kmod.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <linux/lm_interface.h>
-
-struct lmh_wrapper {
- struct list_head lw_list;
- const struct lm_lockops *lw_ops;
-};
-
-static int nolock_mount(char *table_name, char *host_data,
- lm_callback_t cb, void *cb_data,
- unsigned int min_lvb_size, int flags,
- struct lm_lockstruct *lockstruct,
- struct kobject *fskobj);
-
-/* List of registered low-level locking protocols. A file system selects one
- of them by name at mount time, e.g. lock_nolock, lock_dlm. */
-
-static const struct lm_lockops nolock_ops = {
- .lm_proto_name = "lock_nolock",
- .lm_mount = nolock_mount,
-};
-
-static struct lmh_wrapper nolock_proto = {
- .lw_list = LIST_HEAD_INIT(nolock_proto.lw_list),
- .lw_ops = &nolock_ops,
-};
-
-static LIST_HEAD(lmh_list);
-static DEFINE_MUTEX(lmh_lock);
-
-static int nolock_mount(char *table_name, char *host_data,
- lm_callback_t cb, void *cb_data,
- unsigned int min_lvb_size, int flags,
- struct lm_lockstruct *lockstruct,
- struct kobject *fskobj)
-{
- char *c;
- unsigned int jid;
-
- c = strstr(host_data, "jid=");
- if (!c)
- jid = 0;
- else {
- c += 4;
- sscanf(c, "%u", &jid);
- }
-
- lockstruct->ls_jid = jid;
- lockstruct->ls_first = 1;
- lockstruct->ls_lvb_size = min_lvb_size;
- lockstruct->ls_ops = &nolock_ops;
- lockstruct->ls_flags = LM_LSFLAG_LOCAL;
-
- return 0;
-}
-
-/**
- * gfs2_register_lockproto - Register a low-level locking protocol
- * @proto: the protocol definition
- *
- * Returns: 0 on success, -EXXX on failure
- */
-
-int gfs2_register_lockproto(const struct lm_lockops *proto)
-{
- struct lmh_wrapper *lw;
-
- mutex_lock(&lmh_lock);
-
- list_for_each_entry(lw, &lmh_list, lw_list) {
- if (!strcmp(lw->lw_ops->lm_proto_name, proto->lm_proto_name)) {
- mutex_unlock(&lmh_lock);
- printk(KERN_INFO "GFS2: protocol %s already exists\n",
- proto->lm_proto_name);
- return -EEXIST;
- }
- }
-
- lw = kzalloc(sizeof(struct lmh_wrapper), GFP_KERNEL);
- if (!lw) {
- mutex_unlock(&lmh_lock);
- return -ENOMEM;
- }
-
- lw->lw_ops = proto;
- list_add(&lw->lw_list, &lmh_list);
-
- mutex_unlock(&lmh_lock);
-
- return 0;
-}
-
-/**
- * gfs2_unregister_lockproto - Unregister a low-level locking protocol
- * @proto: the protocol definition
- *
- */
-
-void gfs2_unregister_lockproto(const struct lm_lockops *proto)
-{
- struct lmh_wrapper *lw;
-
- mutex_lock(&lmh_lock);
-
- list_for_each_entry(lw, &lmh_list, lw_list) {
- if (!strcmp(lw->lw_ops->lm_proto_name, proto->lm_proto_name)) {
- list_del(&lw->lw_list);
- mutex_unlock(&lmh_lock);
- kfree(lw);
- return;
- }
- }
-
- mutex_unlock(&lmh_lock);
-
- printk(KERN_WARNING "GFS2: can't unregister lock protocol %s\n",
- proto->lm_proto_name);
-}
-
-/**
- * gfs2_mount_lockproto - Mount a lock protocol
- * @proto_name - the name of the protocol
- * @table_name - the name of the lock space
- * @host_data - data specific to this host
- * @cb - the callback to the code using the lock module
- * @sdp - The GFS2 superblock
- * @min_lvb_size - the mininum LVB size that the caller can deal with
- * @flags - LM_MFLAG_*
- * @lockstruct - a structure returned describing the mount
- *
- * Returns: 0 on success, -EXXX on failure
- */
-
-int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
- lm_callback_t cb, void *cb_data,
- unsigned int min_lvb_size, int flags,
- struct lm_lockstruct *lockstruct,
- struct kobject *fskobj)
-{
- struct lmh_wrapper *lw = NULL;
- int try = 0;
- int error, found;
-
-
-retry:
- mutex_lock(&lmh_lock);
-
- if (list_empty(&nolock_proto.lw_list))
- list_add(&nolock_proto.lw_list, &lmh_list);
-
- found = 0;
- list_for_each_entry(lw, &lmh_list, lw_list) {
- if (!strcmp(lw->lw_ops->lm_proto_name, proto_name)) {
- found = 1;
- break;
- }
- }
-
- if (!found) {
- if (!try && capable(CAP_SYS_MODULE)) {
- try = 1;
- mutex_unlock(&lmh_lock);
- request_module(proto_name);
- goto retry;
- }
- printk(KERN_INFO "GFS2: can't find protocol %s\n", proto_name);
- error = -ENOENT;
- goto out;
- }
-
- if (lw->lw_ops->lm_owner &&
- !try_module_get(lw->lw_ops->lm_owner)) {
- try = 0;
- mutex_unlock(&lmh_lock);
- msleep(1000);
- goto retry;
- }
-
- error = lw->lw_ops->lm_mount(table_name, host_data, cb, cb_data,
- min_lvb_size, flags, lockstruct, fskobj);
- if (error)
- module_put(lw->lw_ops->lm_owner);
-out:
- mutex_unlock(&lmh_lock);
- return error;
-}
-
-void gfs2_unmount_lockproto(struct lm_lockstruct *lockstruct)
-{
- mutex_lock(&lmh_lock);
- if (lockstruct->ls_ops->lm_unmount)
- lockstruct->ls_ops->lm_unmount(lockstruct->ls_lockspace);
- if (lockstruct->ls_ops->lm_owner)
- module_put(lockstruct->ls_ops->lm_owner);
- mutex_unlock(&lmh_lock);
-}
-
-/**
- * gfs2_withdraw_lockproto - abnormally unmount a lock module
- * @lockstruct: the lockstruct passed into mount
- *
- */
-
-void gfs2_withdraw_lockproto(struct lm_lockstruct *lockstruct)
-{
- mutex_lock(&lmh_lock);
- lockstruct->ls_ops->lm_withdraw(lockstruct->ls_lockspace);
- if (lockstruct->ls_ops->lm_owner)
- module_put(lockstruct->ls_ops->lm_owner);
- mutex_unlock(&lmh_lock);
-}
-
-EXPORT_SYMBOL_GPL(gfs2_register_lockproto);
-EXPORT_SYMBOL_GPL(gfs2_unregister_lockproto);
-
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