mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-04-02 01:08:26 -04:00
Code Issues Packages Projects Releases Wiki Activity

staging/lustre/obdclass: remove local_storage.[ch]

Browse Source 
Remove the unused files lustre/obdclass/local_storage.[ch].

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
John L. Hammond
2014-09-05 15:08:18 -05:00
committed by Greg Kroah-Hartman
parent 7a8424e4d5
commit 3db7eb2e44
3 changed files with 1 additions and 986 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/staging/lustre/lustre/obdclass/Makefile
View File

@@ -4,6 +4,6 @@ obdclass-y := linux/linux-module.o linux/linux-obdo.o linux/linux-sysctl.o \
llog.o llog_cat.o llog_obd.o llog_swab.o class_obd.o debug.o \
genops.o uuid.o lprocfs_status.o \
lustre_handles.o lustre_peer.o \
local_storage.o statfs_pack.o obdo.o obd_config.o obd_mount.o\
statfs_pack.o obdo.o obd_config.o obd_mount.o \
lu_object.o dt_object.o capa.o cl_object.o \
cl_page.o cl_lock.o cl_io.o lu_ref.o acl.o

894
drivers/staging/lustre/lustre/obdclass/local_storage.c
View File

@@ -1,894 +0,0 @@
/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* 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 version 2 for more details. A copy is
* included in the COPYING file that accompanied this code.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* GPL HEADER END
*/
/*
* Copyright (c) 2012, Intel Corporation.
*/
/*
* lustre/obdclass/local_storage.c
*
* Local storage for file/objects with fid generation. Works on top of OSD.
*
* Author: Mikhail Pershin <mike.pershin@intel.com>
*/
#define DEBUG_SUBSYSTEM S_CLASS
#include "local_storage.h"
/* all initialized local storages on this node are linked on this */
static LIST_HEAD(ls_list_head);
static DEFINE_MUTEX(ls_list_mutex);
static int ls_object_init(const struct lu_env *env, struct lu_object *o,
const struct lu_object_conf *unused)
{
struct ls_device *ls;
struct lu_object *below;
struct lu_device *under;
ls = container_of0(o->lo_dev, struct ls_device, ls_top_dev.dd_lu_dev);
under = &ls->ls_osd->dd_lu_dev;
below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
if (below == NULL)
return -ENOMEM;
lu_object_add(o, below);
return 0;
}
static void ls_object_free(const struct lu_env *env, struct lu_object *o)
{
struct ls_object *obj = lu2ls_obj(o);
struct lu_object_header *h = o->lo_header;
dt_object_fini(&obj->ls_obj);
lu_object_header_fini(h);
OBD_FREE_PTR(obj);
}
struct lu_object_operations ls_lu_obj_ops = {
.loo_object_init = ls_object_init,
.loo_object_free = ls_object_free,
};
struct lu_object *ls_object_alloc(const struct lu_env *env,
const struct lu_object_header *_h,
struct lu_device *d)
{
struct lu_object_header *h;
struct ls_object *o;
struct lu_object *l;
LASSERT(_h == NULL);
OBD_ALLOC_PTR(o);
if (o != NULL) {
l = &o->ls_obj.do_lu;
h = &o->ls_header;
lu_object_header_init(h);
dt_object_init(&o->ls_obj, h, d);
lu_object_add_top(h, l);
l->lo_ops = &ls_lu_obj_ops;
return l;
} else {
return NULL;
}
}
static struct lu_device_operations ls_lu_dev_ops = {
.ldo_object_alloc = ls_object_alloc
};
static struct ls_device *__ls_find_dev(struct dt_device *dev)
{
struct ls_device *ls, *ret = NULL;
list_for_each_entry(ls, &ls_list_head, ls_linkage) {
if (ls->ls_osd == dev) {
atomic_inc(&ls->ls_refcount);
ret = ls;
break;
}
}
return ret;
}
struct ls_device *ls_find_dev(struct dt_device *dev)
{
struct ls_device *ls;
mutex_lock(&ls_list_mutex);
ls = __ls_find_dev(dev);
mutex_unlock(&ls_list_mutex);
return ls;
}
static struct lu_device_type_operations ls_device_type_ops = {
.ldto_start = NULL,
.ldto_stop = NULL,
};
static struct lu_device_type ls_lu_type = {
.ldt_name = "local_storage",
.ldt_ops = &ls_device_type_ops,
};
struct ls_device *ls_device_get(struct dt_device *dev)
{
struct ls_device *ls;
mutex_lock(&ls_list_mutex);
ls = __ls_find_dev(dev);
if (ls)
GOTO(out_ls, ls);
/* not found, then create */
OBD_ALLOC_PTR(ls);
if (ls == NULL)
GOTO(out_ls, ls = ERR_PTR(-ENOMEM));
atomic_set(&ls->ls_refcount, 1);
INIT_LIST_HEAD(&ls->ls_los_list);
mutex_init(&ls->ls_los_mutex);
ls->ls_osd = dev;
LASSERT(dev->dd_lu_dev.ld_site);
lu_device_init(&ls->ls_top_dev.dd_lu_dev, &ls_lu_type);
ls->ls_top_dev.dd_lu_dev.ld_ops = &ls_lu_dev_ops;
ls->ls_top_dev.dd_lu_dev.ld_site = dev->dd_lu_dev.ld_site;
/* finally add ls to the list */
list_add(&ls->ls_linkage, &ls_list_head);
out_ls:
mutex_unlock(&ls_list_mutex);
return ls;
}
void ls_device_put(const struct lu_env *env, struct ls_device *ls)
{
LASSERT(env);
if (!atomic_dec_and_test(&ls->ls_refcount))
return;
mutex_lock(&ls_list_mutex);
if (atomic_read(&ls->ls_refcount) == 0) {
LASSERT(list_empty(&ls->ls_los_list));
list_del(&ls->ls_linkage);
lu_site_purge(env, ls->ls_top_dev.dd_lu_dev.ld_site, ~0);
lu_device_fini(&ls->ls_top_dev.dd_lu_dev);
OBD_FREE_PTR(ls);
}
mutex_unlock(&ls_list_mutex);
}
/**
* local file fid generation
*/
int local_object_fid_generate(const struct lu_env *env,
struct local_oid_storage *los,
struct lu_fid *fid)
{
LASSERT(los->los_dev);
LASSERT(los->los_obj);
/* take next OID */
/* to make it unique after reboot we store
* the latest generated fid atomically with
* object creation see local_object_create() */
mutex_lock(&los->los_id_lock);
fid->f_seq = los->los_seq;
fid->f_oid = ++los->los_last_oid;
fid->f_ver = 0;
mutex_unlock(&los->los_id_lock);
return 0;
}
int local_object_declare_create(const struct lu_env *env,
struct local_oid_storage *los,
struct dt_object *o, struct lu_attr *attr,
struct dt_object_format *dof,
struct thandle *th)
{
struct dt_thread_info *dti = dt_info(env);
int rc;
/* update fid generation file */
if (los != NULL) {
LASSERT(dt_object_exists(los->los_obj));
rc = dt_declare_record_write(env, los->los_obj,
sizeof(struct los_ondisk), 0, th);
if (rc)
return rc;
}
rc = dt_declare_create(env, o, attr, NULL, dof, th);
if (rc)
return rc;
dti->dti_lb.lb_buf = NULL;
dti->dti_lb.lb_len = sizeof(dti->dti_lma);
rc = dt_declare_xattr_set(env, o, &dti->dti_lb, XATTR_NAME_LMA, 0, th);
return rc;
}
int local_object_create(const struct lu_env *env,
struct local_oid_storage *los,
struct dt_object *o, struct lu_attr *attr,
struct dt_object_format *dof, struct thandle *th)
{
struct dt_thread_info *dti = dt_info(env);
__le64 lastid;
int rc;
rc = dt_create(env, o, attr, NULL, dof, th);
if (rc)
return rc;
if (los == NULL)
return rc;
LASSERT(los->los_obj);
LASSERT(dt_object_exists(los->los_obj));
/* many threads can be updated this, serialize
* them here to avoid the race where one thread
* takes the value first, but writes it last */
mutex_lock(&los->los_id_lock);
/* update local oid number on disk so that
* we know the last one used after reboot */
lastid = cpu_to_le64(los->los_last_oid);
dti->dti_off = 0;
dti->dti_lb.lb_buf = &lastid;
dti->dti_lb.lb_len = sizeof(lastid);
rc = dt_record_write(env, los->los_obj, &dti->dti_lb, &dti->dti_off,
th);
mutex_unlock(&los->los_id_lock);
return rc;
}
/*
* Create local named object (file, directory or index) in parent directory.
*/
struct dt_object *__local_file_create(const struct lu_env *env,
const struct lu_fid *fid,
struct local_oid_storage *los,
struct ls_device *ls,
struct dt_object *parent,
const char *name, struct lu_attr *attr,
struct dt_object_format *dof)
{
struct dt_thread_info *dti = dt_info(env);
struct dt_object *dto;
struct thandle *th;
int rc;
dto = ls_locate(env, ls, fid);
if (unlikely(IS_ERR(dto)))
return dto;
LASSERT(dto != NULL);
if (dt_object_exists(dto))
GOTO(out, rc = -EEXIST);
th = dt_trans_create(env, ls->ls_osd);
if (IS_ERR(th))
GOTO(out, rc = PTR_ERR(th));
rc = local_object_declare_create(env, los, dto, attr, dof, th);
if (rc)
GOTO(trans_stop, rc);
if (dti->dti_dof.dof_type == DFT_DIR) {
dt_declare_ref_add(env, dto, th);
dt_declare_ref_add(env, parent, th);
}
rc = dt_declare_insert(env, parent, (void *)fid, (void *)name, th);
if (rc)
GOTO(trans_stop, rc);
rc = dt_trans_start_local(env, ls->ls_osd, th);
if (rc)
GOTO(trans_stop, rc);
dt_write_lock(env, dto, 0);
if (dt_object_exists(dto))
GOTO(unlock, rc = 0);
CDEBUG(D_OTHER, "create new object "DFID"\n",
PFID(lu_object_fid(&dto->do_lu)));
rc = local_object_create(env, los, dto, attr, dof, th);
if (rc)
GOTO(unlock, rc);
LASSERT(dt_object_exists(dto));
if (dti->dti_dof.dof_type == DFT_DIR) {
if (!dt_try_as_dir(env, dto))
GOTO(destroy, rc = -ENOTDIR);
/* Add "." and ".." for newly created dir */
rc = dt_insert(env, dto, (void *)fid, (void *)".", th,
BYPASS_CAPA, 1);
if (rc)
GOTO(destroy, rc);
dt_ref_add(env, dto, th);
rc = dt_insert(env, dto, (void *)lu_object_fid(&parent->do_lu),
(void *)"..", th, BYPASS_CAPA, 1);
if (rc)
GOTO(destroy, rc);
}
dt_write_lock(env, parent, 0);
rc = dt_insert(env, parent, (const struct dt_rec *)fid,
(const struct dt_key *)name, th, BYPASS_CAPA, 1);
if (dti->dti_dof.dof_type == DFT_DIR)
dt_ref_add(env, parent, th);
dt_write_unlock(env, parent);
if (rc)
GOTO(destroy, rc);
destroy:
if (rc)
dt_destroy(env, dto, th);
unlock:
dt_write_unlock(env, dto);
trans_stop:
dt_trans_stop(env, ls->ls_osd, th);
out:
if (rc) {
lu_object_put_nocache(env, &dto->do_lu);
dto = ERR_PTR(rc);
}
return dto;
}
/*
* Look up and create (if it does not exist) a local named file or directory in
* parent directory.
*/
struct dt_object *local_file_find_or_create(const struct lu_env *env,
struct local_oid_storage *los,
struct dt_object *parent,
const char *name, __u32 mode)
{
struct dt_thread_info *dti = dt_info(env);
struct dt_object *dto;
int rc;
LASSERT(parent);
rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
if (rc == 0)
/* name is found, get the object */
dto = ls_locate(env, dt2ls_dev(los->los_dev), &dti->dti_fid);
else if (rc != -ENOENT)
dto = ERR_PTR(rc);
else {
rc = local_object_fid_generate(env, los, &dti->dti_fid);
if (rc < 0) {
dto = ERR_PTR(rc);
} else {
/* create the object */
dti->dti_attr.la_valid = LA_MODE;
dti->dti_attr.la_mode = mode;
dti->dti_dof.dof_type = dt_mode_to_dft(mode & S_IFMT);
dto = __local_file_create(env, &dti->dti_fid, los,
dt2ls_dev(los->los_dev),
parent, name, &dti->dti_attr,
&dti->dti_dof);
}
}
return dto;
}
EXPORT_SYMBOL(local_file_find_or_create);
struct dt_object *local_file_find_or_create_with_fid(const struct lu_env *env,
struct dt_device *dt,
const struct lu_fid *fid,
struct dt_object *parent,
const char *name,
__u32 mode)
{
struct dt_thread_info *dti = dt_info(env);
struct dt_object *dto;
int rc;
LASSERT(parent);
rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
if (rc == 0) {
dto = dt_locate(env, dt, &dti->dti_fid);
} else if (rc != -ENOENT) {
dto = ERR_PTR(rc);
} else {
struct ls_device *ls;
ls = ls_device_get(dt);
if (IS_ERR(ls)) {
dto = ERR_CAST(ls);
} else {
/* create the object */
dti->dti_attr.la_valid = LA_MODE;
dti->dti_attr.la_mode = mode;
dti->dti_dof.dof_type = dt_mode_to_dft(mode & S_IFMT);
dto = __local_file_create(env, fid, NULL, ls, parent,
name, &dti->dti_attr,
&dti->dti_dof);
/* ls_device_put() will finalize the ls device, we
* have to open the object in other device stack */
if (!IS_ERR(dto)) {
dti->dti_fid = dto->do_lu.lo_header->loh_fid;
lu_object_put_nocache(env, &dto->do_lu);
dto = dt_locate(env, dt, &dti->dti_fid);
}
ls_device_put(env, ls);
}
}
return dto;
}
EXPORT_SYMBOL(local_file_find_or_create_with_fid);
/*
* Look up and create (if it does not exist) a local named index file in parent
* directory.
*/
struct dt_object *local_index_find_or_create(const struct lu_env *env,
struct local_oid_storage *los,
struct dt_object *parent,
const char *name, __u32 mode,
const struct dt_index_features *ft)
{
struct dt_thread_info *dti = dt_info(env);
struct dt_object *dto;
int rc;
LASSERT(parent);
rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
if (rc == 0) {
/* name is found, get the object */
dto = ls_locate(env, dt2ls_dev(los->los_dev), &dti->dti_fid);
} else if (rc != -ENOENT) {
dto = ERR_PTR(rc);
} else {
rc = local_object_fid_generate(env, los, &dti->dti_fid);
if (rc < 0) {
dto = ERR_PTR(rc);
} else {
/* create the object */
dti->dti_attr.la_valid = LA_MODE;
dti->dti_attr.la_mode = mode;
dti->dti_dof.dof_type = DFT_INDEX;
dti->dti_dof.u.dof_idx.di_feat = ft;
dto = __local_file_create(env, &dti->dti_fid, los,
dt2ls_dev(los->los_dev),
parent, name, &dti->dti_attr,
&dti->dti_dof);
}
}
return dto;
}
EXPORT_SYMBOL(local_index_find_or_create);
struct dt_object *
local_index_find_or_create_with_fid(const struct lu_env *env,
struct dt_device *dt,
const struct lu_fid *fid,
struct dt_object *parent,
const char *name, __u32 mode,
const struct dt_index_features *ft)
{
struct dt_thread_info *dti = dt_info(env);
struct dt_object *dto;
int rc;
LASSERT(parent);
rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
if (rc == 0) {
/* name is found, get the object */
if (!lu_fid_eq(fid, &dti->dti_fid))
dto = ERR_PTR(-EINVAL);
else
dto = dt_locate(env, dt, fid);
} else if (rc != -ENOENT) {
dto = ERR_PTR(rc);
} else {
struct ls_device *ls;
ls = ls_device_get(dt);
if (IS_ERR(ls)) {
dto = ERR_CAST(ls);
} else {
/* create the object */
dti->dti_attr.la_valid = LA_MODE;
dti->dti_attr.la_mode = mode;
dti->dti_dof.dof_type = DFT_INDEX;
dti->dti_dof.u.dof_idx.di_feat = ft;
dto = __local_file_create(env, fid, NULL, ls, parent,
name, &dti->dti_attr,
&dti->dti_dof);
/* ls_device_put() will finalize the ls device, we
* have to open the object in other device stack */
if (!IS_ERR(dto)) {
dti->dti_fid = dto->do_lu.lo_header->loh_fid;
lu_object_put_nocache(env, &dto->do_lu);
dto = dt_locate(env, dt, &dti->dti_fid);
}
ls_device_put(env, ls);
}
}
return dto;
}
EXPORT_SYMBOL(local_index_find_or_create_with_fid);
static int local_object_declare_unlink(const struct lu_env *env,
struct dt_device *dt,
struct dt_object *p,
struct dt_object *c, const char *name,
struct thandle *th)
{
int rc;
rc = dt_declare_delete(env, p, (const struct dt_key *)name, th);
if (rc < 0)
return rc;
rc = dt_declare_ref_del(env, c, th);
if (rc < 0)
return rc;
return dt_declare_destroy(env, c, th);
}
int local_object_unlink(const struct lu_env *env, struct dt_device *dt,
struct dt_object *parent, const char *name)
{
struct dt_thread_info *dti = dt_info(env);
struct dt_object *dto;
struct thandle *th;
int rc;
rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
if (rc == -ENOENT)
return 0;
else if (rc < 0)
return rc;
dto = dt_locate(env, dt, &dti->dti_fid);
if (unlikely(IS_ERR(dto)))
return PTR_ERR(dto);
th = dt_trans_create(env, dt);
if (IS_ERR(th))
GOTO(out, rc = PTR_ERR(th));
rc = local_object_declare_unlink(env, dt, parent, dto, name, th);
if (rc < 0)
GOTO(stop, rc);
rc = dt_trans_start_local(env, dt, th);
if (rc < 0)
GOTO(stop, rc);
dt_write_lock(env, dto, 0);
rc = dt_delete(env, parent, (struct dt_key *)name, th, BYPASS_CAPA);
if (rc < 0)
GOTO(unlock, rc);
rc = dt_ref_del(env, dto, th);
if (rc < 0) {
rc = dt_insert(env, parent,
(const struct dt_rec *)&dti->dti_fid,
(const struct dt_key *)name, th, BYPASS_CAPA, 1);
GOTO(unlock, rc);
}
rc = dt_destroy(env, dto, th);
unlock:
dt_write_unlock(env, dto);
stop:
dt_trans_stop(env, dt, th);
out:
lu_object_put_nocache(env, &dto->do_lu);
return rc;
}
EXPORT_SYMBOL(local_object_unlink);
struct local_oid_storage *dt_los_find(struct ls_device *ls, __u64 seq)
{
struct local_oid_storage *los, *ret = NULL;
list_for_each_entry(los, &ls->ls_los_list, los_list) {
if (los->los_seq == seq) {
atomic_inc(&los->los_refcount);
ret = los;
break;
}
}
return ret;
}
void dt_los_put(struct local_oid_storage *los)
{
if (atomic_dec_and_test(&los->los_refcount))
/* should never happen, only local_oid_storage_fini should
* drop refcount to zero */
LBUG();
return;
}
/* after Lustre 2.3 release there may be old file to store last generated FID
* If such file exists then we have to read its content
*/
int lastid_compat_check(const struct lu_env *env, struct dt_device *dev,
__u64 lastid_seq, __u32 *first_oid, struct ls_device *ls)
{
struct dt_thread_info *dti = dt_info(env);
struct dt_object *root = NULL;
struct los_ondisk losd;
struct dt_object *o = NULL;
int rc = 0;
rc = dt_root_get(env, dev, &dti->dti_fid);
if (rc)
return rc;
root = ls_locate(env, ls, &dti->dti_fid);
if (IS_ERR(root))
return PTR_ERR(root);
/* find old last_id file */
snprintf(dti->dti_buf, sizeof(dti->dti_buf), "seq-%#llx-lastid",
lastid_seq);
rc = dt_lookup_dir(env, root, dti->dti_buf, &dti->dti_fid);
lu_object_put_nocache(env, &root->do_lu);
if (rc == -ENOENT) {
/* old llog lastid accessed by FID only */
if (lastid_seq != FID_SEQ_LLOG)
return 0;
dti->dti_fid.f_seq = FID_SEQ_LLOG;
dti->dti_fid.f_oid = 1;
dti->dti_fid.f_ver = 0;
o = ls_locate(env, ls, &dti->dti_fid);
if (IS_ERR(o))
return PTR_ERR(o);
if (!dt_object_exists(o)) {
lu_object_put_nocache(env, &o->do_lu);
return 0;
}
CDEBUG(D_INFO, "Found old llog lastid file\n");
} else if (rc < 0) {
return rc;
} else {
CDEBUG(D_INFO, "Found old lastid file for sequence %#llx\n",
lastid_seq);
o = ls_locate(env, ls, &dti->dti_fid);
if (IS_ERR(o))
return PTR_ERR(o);
}
/* let's read seq-NNNNNN-lastid file value */
LASSERT(dt_object_exists(o));
dti->dti_off = 0;
dti->dti_lb.lb_buf = &losd;
dti->dti_lb.lb_len = sizeof(losd);
dt_read_lock(env, o, 0);
rc = dt_record_read(env, o, &dti->dti_lb, &dti->dti_off);
dt_read_unlock(env, o);
lu_object_put_nocache(env, &o->do_lu);
if (rc == 0 && le32_to_cpu(losd.lso_magic) != LOS_MAGIC) {
CERROR("%s: wrong content of seq-%#llx-lastid file, magic %x\n",
o->do_lu.lo_dev->ld_obd->obd_name, lastid_seq,
le32_to_cpu(losd.lso_magic));
return -EINVAL;
} else if (rc < 0) {
CERROR("%s: failed to read seq-%#llx-lastid: rc = %d\n",
o->do_lu.lo_dev->ld_obd->obd_name, lastid_seq, rc);
return rc;
}
*first_oid = le32_to_cpu(losd.lso_next_oid);
return rc;
}
/**
* Initialize local OID storage for required sequence.
* That may be needed for services that uses local files and requires
* dynamic OID allocation for them.
*
* Per each sequence we have an object with 'first_fid' identificator
* containing the counter for OIDs of locally created files with that
* sequence.
*
* It is used now by llog subsystem and MGS for NID tables
*
* Function gets first_fid to create counter object.
* All dynamic fids will be generated with the same sequence and incremented
* OIDs
*
* Returned local_oid_storage is in-memory representation of OID storage
*/
int local_oid_storage_init(const struct lu_env *env, struct dt_device *dev,
const struct lu_fid *first_fid,
struct local_oid_storage **los)
{
struct dt_thread_info *dti = dt_info(env);
struct ls_device *ls;
u64 lastid;
struct dt_object *o = NULL;
struct thandle *th;
__u32 first_oid = fid_oid(first_fid);
int rc = 0;
ls = ls_device_get(dev);
if (IS_ERR(ls))
return PTR_ERR(ls);
mutex_lock(&ls->ls_los_mutex);
*los = dt_los_find(ls, fid_seq(first_fid));
if (*los != NULL)
GOTO(out, rc = 0);
/* not found, then create */
OBD_ALLOC_PTR(*los);
if (*los == NULL)
GOTO(out, rc = -ENOMEM);
atomic_set(&(*los)->los_refcount, 1);
mutex_init(&(*los)->los_id_lock);
(*los)->los_dev = &ls->ls_top_dev;
atomic_inc(&ls->ls_refcount);
list_add(&(*los)->los_list, &ls->ls_los_list);
/* Use {seq, 0, 0} to create the LAST_ID file for every
* sequence. OIDs start at LUSTRE_FID_INIT_OID.
*/
dti->dti_fid.f_seq = fid_seq(first_fid);
dti->dti_fid.f_oid = LUSTRE_FID_LASTID_OID;
dti->dti_fid.f_ver = 0;
o = ls_locate(env, ls, &dti->dti_fid);
if (IS_ERR(o))
GOTO(out_los, rc = PTR_ERR(o));
if (!dt_object_exists(o)) {
rc = lastid_compat_check(env, dev, fid_seq(first_fid),
&first_oid, ls);
if (rc < 0)
GOTO(out_los, rc);
th = dt_trans_create(env, dev);
if (IS_ERR(th))
GOTO(out_los, rc = PTR_ERR(th));
dti->dti_attr.la_valid = LA_MODE | LA_TYPE;
dti->dti_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
dti->dti_dof.dof_type = dt_mode_to_dft(S_IFREG);
rc = dt_declare_create(env, o, &dti->dti_attr, NULL,
&dti->dti_dof, th);
if (rc)
GOTO(out_trans, rc);
rc = dt_declare_record_write(env, o, sizeof(lastid), 0, th);
if (rc)
GOTO(out_trans, rc);
rc = dt_trans_start_local(env, dev, th);
if (rc)
GOTO(out_trans, rc);
dt_write_lock(env, o, 0);
if (dt_object_exists(o))
GOTO(out_lock, rc = 0);
rc = dt_create(env, o, &dti->dti_attr, NULL, &dti->dti_dof,
th);
if (rc)
GOTO(out_lock, rc);
lastid = cpu_to_le64(first_oid);
dti->dti_off = 0;
dti->dti_lb.lb_buf = &lastid;
dti->dti_lb.lb_len = sizeof(lastid);
rc = dt_record_write(env, o, &dti->dti_lb, &dti->dti_off, th);
if (rc)
GOTO(out_lock, rc);
out_lock:
dt_write_unlock(env, o);
out_trans:
dt_trans_stop(env, dev, th);
} else {
dti->dti_off = 0;
dti->dti_lb.lb_buf = &lastid;
dti->dti_lb.lb_len = sizeof(lastid);
dt_read_lock(env, o, 0);
rc = dt_record_read(env, o, &dti->dti_lb, &dti->dti_off);
dt_read_unlock(env, o);
if (rc == 0 && le64_to_cpu(lastid) > OBIF_MAX_OID) {
CERROR("%s: bad oid %llu is read from LAST_ID\n",
o->do_lu.lo_dev->ld_obd->obd_name,
le64_to_cpu(lastid));
rc = -EINVAL;
}
}
out_los:
if (rc != 0) {
list_del(&(*los)->los_list);
atomic_dec(&ls->ls_refcount);
OBD_FREE_PTR(*los);
*los = NULL;
if (o != NULL && !IS_ERR(o))
lu_object_put_nocache(env, &o->do_lu);
} else {
(*los)->los_seq = fid_seq(first_fid);
(*los)->los_last_oid = le64_to_cpu(lastid);
(*los)->los_obj = o;
/* Read value should not be less than initial one
* but possible after upgrade from older fs.
* In this case just switch to the first_oid in memory and
* it will be updated on disk with first object generated */
if ((*los)->los_last_oid < first_oid)
(*los)->los_last_oid = first_oid;
}
out:
mutex_unlock(&ls->ls_los_mutex);
ls_device_put(env, ls);
return rc;
}
EXPORT_SYMBOL(local_oid_storage_init);
void local_oid_storage_fini(const struct lu_env *env,
struct local_oid_storage *los)
{
struct ls_device *ls;
if (!atomic_dec_and_test(&los->los_refcount))
return;
LASSERT(env);
LASSERT(los->los_dev);
ls = dt2ls_dev(los->los_dev);
mutex_lock(&ls->ls_los_mutex);
if (atomic_read(&los->los_refcount) == 0) {
if (los->los_obj)
lu_object_put_nocache(env, &los->los_obj->do_lu);
list_del(&los->los_list);
OBD_FREE_PTR(los);
}
mutex_unlock(&ls->ls_los_mutex);
ls_device_put(env, ls);
}
EXPORT_SYMBOL(local_oid_storage_fini);

91
drivers/staging/lustre/lustre/obdclass/local_storage.h
View File

@@ -1,91 +0,0 @@
/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* 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 version 2 for more details. A copy is
* included in the COPYING file that accompanied this code.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* GPL HEADER END
*/
/*
* Copyright (c) 2012, Intel Corporation.
*/
/*
* lustre/obdclass/local_storage.c
*
* Local storage for file/objects with fid generation. Works on top of OSD.
*
* Author: Mikhail Pershin <mike.pershin@intel.com>
*/
#ifndef __LOCAL_STORAGE_H
#define __LOCAL_STORAGE_H
#include "../include/dt_object.h"
#include "../include/obd.h"
#include "../include/lustre_fid.h"
#include "../include/lustre_disk.h"
struct ls_device {
struct dt_device ls_top_dev;
/* all initialized ls_devices on this node linked by this */
struct list_head ls_linkage;
/* how many handle's reference this local storage */
atomic_t ls_refcount;
/* underlaying OSD device */
struct dt_device *ls_osd;
/* list of all local OID storages */
struct list_head ls_los_list;
struct mutex ls_los_mutex;
};
static inline struct ls_device *dt2ls_dev(struct dt_device *d)
{
return container_of0(d, struct ls_device, ls_top_dev);
}
struct ls_object {
struct lu_object_header ls_header;
struct dt_object ls_obj;
};
static inline struct ls_object *lu2ls_obj(struct lu_object *o)
{
return container_of0(o, struct ls_object, ls_obj.do_lu);
}
static inline struct dt_object *ls_locate(const struct lu_env *env,
struct ls_device *ls,
const struct lu_fid *fid)
{
return dt_locate_at(env, ls->ls_osd, fid, &ls->ls_top_dev.dd_lu_dev);
}
struct ls_device *ls_device_get(struct dt_device *dev);
void ls_device_put(const struct lu_env *env, struct ls_device *ls);
struct local_oid_storage *dt_los_find(struct ls_device *ls, __u64 seq);
void dt_los_put(struct local_oid_storage *los);
/* Lustre 2.3 on-disk structure describing local object OIDs storage
* the structure to be used with any sequence managed by
* local object library.
* Obsoleted since 2.4 but is kept for compatibility reasons,
* see lastid_compat_check() in obdclass/local_storage.c */
struct los_ondisk {
__u32 lso_magic;
__u32 lso_next_oid;
};
#define LOS_MAGIC 0xdecafbee
#endif