Viewing: osc_dev.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
* Implementation of cl_device, for OSC layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
*/
#define DEBUG_SUBSYSTEM S_OSC
/* class_name2obd() */
#include <obd_class.h>
#include <lustre_osc.h>
#include <uapi/linux/lustre/lustre_param.h>
#include "osc_internal.h"
/** \addtogroup osc
* @{
*/
struct kmem_cache *osc_lock_kmem;
EXPORT_SYMBOL(osc_lock_kmem);
struct kmem_cache *osc_object_kmem;
EXPORT_SYMBOL(osc_object_kmem);
struct kmem_cache *osc_thread_kmem;
struct kmem_cache *osc_session_kmem;
struct kmem_cache *osc_extent_kmem;
struct kmem_cache *osc_obdo_kmem;
struct lu_kmem_descr osc_caches[] = {
{
.ckd_cache = &osc_lock_kmem,
.ckd_name = "osc_lock_kmem",
.ckd_size = sizeof (struct osc_lock)
},
{
.ckd_cache = &osc_object_kmem,
.ckd_name = "osc_object_kmem",
.ckd_size = sizeof (struct osc_object)
},
{
.ckd_cache = &osc_thread_kmem,
.ckd_name = "osc_thread_kmem",
.ckd_size = sizeof (struct osc_thread_info)
},
{
.ckd_cache = &osc_session_kmem,
.ckd_name = "osc_session_kmem",
.ckd_size = sizeof (struct osc_session)
},
{
.ckd_cache = &osc_extent_kmem,
.ckd_name = "osc_extent_kmem",
.ckd_size = sizeof (struct osc_extent)
},
{
.ckd_cache = &osc_obdo_kmem,
.ckd_name = "osc_obdo_kmem",
.ckd_size = sizeof(struct obdo)
},
{
.ckd_cache = NULL
}
};
/*****************************************************************************
*
* Osc device and device type functions.
*
*/
static void *osc_key_init(const struct lu_context *ctx,
struct lu_context_key *key)
{
struct osc_thread_info *info;
OBD_SLAB_ALLOC_PTR_GFP(info, osc_thread_kmem, GFP_NOFS);
if (info == NULL)
info = ERR_PTR(-ENOMEM);
return info;
}
static void osc_key_fini(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
{
struct osc_thread_info *info = data;
lu_buf_free(&info->oti_ladvise_buf);
OBD_SLAB_FREE_PTR(info, osc_thread_kmem);
}
struct lu_context_key osc_key = {
.lct_tags = LCT_CL_THREAD,
.lct_init = osc_key_init,
.lct_fini = osc_key_fini
};
EXPORT_SYMBOL(osc_key);
static void *osc_session_init(const struct lu_context *ctx,
struct lu_context_key *key)
{
struct osc_session *info;
OBD_SLAB_ALLOC_PTR_GFP(info, osc_session_kmem, GFP_NOFS);
if (info == NULL)
info = ERR_PTR(-ENOMEM);
return info;
}
static void osc_session_fini(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
{
struct osc_session *info = data;
OBD_SLAB_FREE_PTR(info, osc_session_kmem);
}
struct lu_context_key osc_session_key = {
.lct_tags = LCT_SESSION,
.lct_init = osc_session_init,
.lct_fini = osc_session_fini
};
EXPORT_SYMBOL(osc_session_key);
/* type constructor/destructor: osc_type_{init,fini,start,stop}(). */
LU_TYPE_INIT_FINI(osc, &osc_key, &osc_session_key);
static int osc_process_config(const struct lu_env *env, struct lu_device *d,
struct lustre_cfg *cfg)
{
ssize_t count = class_modify_config(cfg, PARAM_OSC,
&d->ld_obd->obd_kset.kobj);
return count > 0 ? 0 : count;
}
static const struct lu_device_operations osc_lu_ops = {
.ldo_object_alloc = osc_object_alloc,
.ldo_process_config = osc_process_config,
.ldo_recovery_complete = NULL
};
static int osc_device_init(const struct lu_env *env, struct lu_device *d,
const char *name, struct lu_device *next)
{
RETURN(0);
}
static struct lu_device *osc_device_fini(const struct lu_env *env,
struct lu_device *d)
{
struct obd_device *obd = d->ld_obd;
ENTRY;
ptlrpc_lprocfs_unregister_obd(obd);
osc_precleanup_common(obd);
RETURN(NULL);
}
static struct lu_device *osc_device_free(const struct lu_env *env,
struct lu_device *d)
{
struct osc_device *oc = lu2osc_dev(d);
struct obd_device *obd = d->ld_obd;
cl_device_fini(lu2cl_dev(d));
if (obd)
osc_cleanup_common(obd);
OBD_FREE_PTR(oc);
return NULL;
}
static struct lu_device *osc_device_alloc(const struct lu_env *env,
struct lu_device_type *t,
struct lustre_cfg *cfg)
{
struct lu_device *d;
struct osc_device *osc;
struct obd_device *obd;
int rc;
OBD_ALLOC_PTR(osc);
if (osc == NULL)
RETURN(ERR_PTR(-ENOMEM));
cl_device_init(&osc->osc_cl, t);
d = osc2lu_dev(osc);
d->ld_ops = &osc_lu_ops;
/* Setup OSC OBD */
obd = class_name2obd(lustre_cfg_string(cfg, 0));
LASSERT(obd != NULL);
obd->obd_lu_dev = d;
d->ld_obd = obd;
rc = osc_setup(obd, cfg);
if (rc) {
osc_device_free(env, d);
RETURN(ERR_PTR(rc));
}
osc->osc_exp = obd->obd_self_export;
osc->osc_stats.os_init = ktime_get_real();
RETURN(d);
}
static const struct lu_device_type_operations osc_device_type_ops = {
.ldto_init = osc_type_init,
.ldto_fini = osc_type_fini,
.ldto_start = osc_type_start,
.ldto_stop = osc_type_stop,
.ldto_device_alloc = osc_device_alloc,
.ldto_device_free = osc_device_free,
.ldto_device_init = osc_device_init,
.ldto_device_fini = osc_device_fini
};
struct lu_device_type osc_device_type = {
.ldt_tags = LU_DEVICE_CL,
.ldt_name = LUSTRE_OSC_NAME,
.ldt_ops = &osc_device_type_ops,
.ldt_ctx_tags = LCT_CL_THREAD
};
/** @} osc */
