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/*********************************************************
* Copyright (C) 2006 VMware, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of the Common
* Development and Distribution License (the "License") version 1.0
* and no later version. You may not use this file except in
* compliance with the License.
*
* You can obtain a copy of the License at
* http://www.opensource.org/licenses/cddl1.php
*
* See the License for the specific language governing permissions
* and limitations under the License.
*
*********************************************************/
/*
* module.c --
*
* Main loading and unloading of kernel module.
*/
#include <sys/errno.h>
#include "module.h"
#include "block.h"
static vfsdef_t VMBlockVfsDef = {
VFSDEF_VERSION, /* Structure version: defined in <sys/vfs.h> */
VMBLOCK_FS_NAME, /* Name of file system */
VMBlockInit, /* File system initialization routine */
VMBLOCK_VFSSW_FLAGS, /* File system flags */
NULL /* No mount options */
};
/* Filesystem module structure */
static struct modlfs VMBlockModlfs = {
&mod_fsops, /* Module operation structure: for
* auto loading/unloading */
"VMBlock File system", /* Name */
&VMBlockVfsDef /* Filesystem type definition record */
};
static struct modlinkage VMBlockModlinkage = {
MODREV_1, /* Module revision: must be MODREV_1 */
{
&VMBlockModlfs, /* FS module structure */
NULL,
}
};
#ifdef VMX86_DEBUG
/* XXX: Figure out how to pass this in at module load time. */
int LOGLEVEL = 4;
#else
int LOGLEVEL = 0;
#endif
int vmblockType;
vnodeops_t *vmblockVnodeOps;
/*
* Module loading/unloading/info functions.
*/
/*
*----------------------------------------------------------------------------
*
* _init --
* Invoked when module is being loaded into kernel, and is called before
* any function in the module. Any state that spans all instances of the
* driver should be allocated and initialized here.
*
* Results:
* Returns the result of mod_install(9F), which is zero on success and a
* non-zero value on failure.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------------
*/
int
_init(void)
{
int error;
error = mod_install(&VMBlockModlinkage);
if (error) {
Warning("Could not install vmblock module.\n");
return error;
}
error = BlockInit();
if (error) {
Warning("Could not initialize blocking.\n");
mod_remove(&VMBlockModlinkage);
return error;
}
return 0;
}
/*
*----------------------------------------------------------------------------
*
* _fini --
* Invoked when a module is being removed from the kernel.
*
* Results:
* Returns the result of mod_remove(9F), which is zero on success, and a
* non-zero value on failure.
*
* Side effects:
* The module will be removed from the kernel.
*
*----------------------------------------------------------------------------
*/
int
_fini(void)
{
int error;
error = mod_remove(&VMBlockModlinkage);
if (error) {
Warning("Could not remove vmblock module.\n");
return error;
}
BlockCleanup();
vfs_freevfsops_by_type(vmblockType);
vn_freevnodeops(vmblockVnodeOps);
return 0;
}
/*
*----------------------------------------------------------------------------
*
* _info --
*
* Invoked when the modinfo(1M) command is executed. mod_info(9F) handles
* this for us.
*
* Results:
* Returns mod_info(9F)'s results, which are a non-zero value on success, and
* zero on failure.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------------
*/
int
_info(struct modinfo *modinfop) // OUT: Filled in with module's information
{
return mod_info(&VMBlockModlinkage, modinfop);
}
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