Viewing: osd_handler.c
// SPDX-License-Identifier: GPL-2.0
/*
* wbcFS OSD module
*
* Author: Yingjin Qian <qian@ddn.com>
*/
#define DEBUG_SUBSYSTEM S_OSD
#include <obd_support.h>
#include <md_object.h>
#include <obd_class.h>
#include "osd_internal.h"
#include "wbcfs.h"
struct kmem_cache *osd_it_cachep;
struct kmem_cache *osd_hash_it_cachep;
static struct lu_kmem_descr wbcfs_caches[] = {
{
.ckd_cache = &osd_it_cachep,
.ckd_name = "osd_it_cache",
.ckd_size = sizeof(struct osd_it)
},
{
.ckd_cache = &osd_hash_it_cachep,
.ckd_name = "osd_hash_it_cache",
.ckd_size = sizeof(struct osd_hash_it)
},
{
.ckd_cache = NULL
}
};
/* Copied form osd-ldiskfs to open/put file handle in kenrel. */
struct work_struct flush_fput;
atomic_t descriptors_cnt;
unsigned int wbcfs_flush_descriptors_cnt = 5000;
#ifdef HAVE_FLUSH_DELAYED_FPUT
# define cfs_flush_delayed_fput() flush_delayed_fput()
#else
void (*cfs_flush_delayed_fput)(void);
#endif /* HAVE_FLUSH_DELAYED_FPUT */
static void osd_flush_fput(struct work_struct *work)
{
/* flush file descriptors when too many files */
CDEBUG_LIMIT(D_HA, "Flushing file descriptors limit %d\n",
wbcfs_flush_descriptors_cnt);
/* descriptors_cnt triggers the threshold when a flush is started,
* but all pending descriptors will be flushed each time, so it
* doesn't need to exactly match the number of descriptors.
*/
atomic_set(&descriptors_cnt, 0);
cfs_flush_delayed_fput();
}
static struct lu_object *osd_object_alloc(const struct lu_env *env,
const struct lu_object_header *hdr,
struct lu_device *d)
{
struct osd_object *obj;
struct lu_object *l;
OBD_ALLOC_PTR(obj);
if (!obj)
return NULL;
l = &obj->oo_dt.do_lu;
dt_object_init(&obj->oo_dt, NULL, d);
obj->oo_dt.do_ops = &osd_obj_ops;
l->lo_ops = &osd_lu_obj_ops;
init_rwsem(&obj->oo_dt.dd_sem);
init_rwsem(&obj->oo_guard);
return l;
}
static int osd_shutdown(const struct lu_env *env, struct osd_device *osd)
{
seq_target_fini(env, &osd->od_dt_dev);
return 0;
}
static int osd_mount(const struct lu_env *env,
struct osd_device *osd, struct lustre_cfg *cfg)
{
struct file_system_type *type;
struct inode *inode;
unsigned long flags = 0;
struct lu_fid fid;
int rc = 0;
ENTRY;
if (osd->od_mnt != NULL)
RETURN(0);
type = get_fs_type("wbcfs");
if (type == NULL) {
CERROR("%s: Cannot find wbcfs FS type.\n", osd_name(osd));
RETURN(-ENODEV);
}
flags |= SB_KERNMOUNT;
osd->od_mnt = vfs_kern_mount(type, flags, NULL, NULL);
module_put(type->owner);
if (IS_ERR(osd->od_mnt)) {
rc = PTR_ERR(osd->od_mnt);
osd->od_mnt = NULL;
CERROR("%s: Failed to mount wbcfs in kernel: rc=%d\n",
osd_name(osd), rc);
RETURN(rc);
}
inode = osd_sb(osd)->s_root->d_inode;
lu_local_obj_fid(&fid, OSD_FS_ROOT_OID);
inode->i_ino = lu_fid_build_ino(&fid, 0);
inode->i_generation = lu_fid_build_gen(&fid);
MEMFS_I(inode)->mei_fid = fid;
__insert_inode_hash(inode, inode->i_ino);
RETURN(rc);
}
static int osd_process_config(const struct lu_env *env,
struct lu_device *d, struct lustre_cfg *cfg)
{
struct osd_device *osd = osd_dev(d);
int count;
int rc;
ENTRY;
switch (cfg->lcfg_command) {
case LCFG_SETUP:
rc = osd_mount(env, osd, cfg);
break;
case LCFG_CLEANUP:
/*
* For the case LCFG_PRE_CLEANUP is not called in advance,
* that may happen if hit failure during mount process.
*/
lu_dev_del_linkage(d->ld_site, d);
rc = osd_shutdown(env, osd);
break;
case LCFG_PARAM:
LASSERT(&osd->od_dt_dev);
count = class_modify_config(cfg, PARAM_OSD,
&osd->od_dt_dev.dd_kobj);
if (count < 0)
count = class_modify_config(cfg, PARAM_OST,
&osd->od_dt_dev.dd_kobj);
rc = count > 0 ? 0 : count;
break;
case LCFG_PRE_CLEANUP:
rc = 0;
break;
default:
rc = -EOPNOTSUPP;
}
RETURN(rc);
}
static int osd_recovery_complete(const struct lu_env *env, struct lu_device *d)
{
RETURN(0);
}
static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
struct lu_device *dev)
{
struct osd_device *osd = osd_dev(dev);
int rc = 0;
rc = seq_target_init(env, &osd->od_dt_dev, osd->od_svname,
osd->od_is_ost);
RETURN(rc);
}
const struct lu_device_operations osd_wbcfs_lu_ops = {
.ldo_object_alloc = osd_object_alloc,
.ldo_process_config = osd_process_config,
.ldo_recovery_complete = osd_recovery_complete,
.ldo_prepare = osd_prepare,
.ldo_fid_alloc = fid_alloc_generic,
};
static int osd_root_get(const struct lu_env *env,
struct dt_device *dev, struct lu_fid *f)
{
lu_local_obj_fid(f, OSD_FS_ROOT_OID);
return 0;
}
static int osd_statfs(const struct lu_env *env, struct dt_device *d,
struct obd_statfs *sfs, struct obd_statfs_info *info)
{
struct osd_device *osd = osd_dt_dev(d);
struct super_block *sb = osd_sb(osd);
struct kstatfs ksfs;
int rc;
if (unlikely(!sb))
return -EINPROGRESS;
memset(&ksfs, 0, sizeof(ksfs));
rc = sb->s_op->statfs(sb->s_root, &ksfs);
if (rc)
RETURN(rc);
statfs_pack(sfs, &ksfs);
if (unlikely(sb->s_flags & SB_RDONLY))
sfs->os_state |= OS_STATFS_READONLY;
if (sfs->os_blocks == 0) {
sfs->os_blocks = memfs_default_max_blocks();
sfs->os_bfree = sfs->os_blocks;
sfs->os_bavail = sfs->os_bfree;
}
if (sfs->os_files == 0) {
sfs->os_files = memfs_default_max_inodes();
sfs->os_ffree = sfs->os_files;
}
sfs->os_state |= OS_STATFS_NONROT;
sfs->os_namelen = NAME_MAX;
sfs->os_maxbytes = sb->s_maxbytes;
return 0;
}
static struct thandle *osd_trans_create(const struct lu_env *env,
struct dt_device *d)
{
struct osd_thandle *oh;
struct thandle *th;
ENTRY;
if (d->dd_rdonly) {
CERROR("%s: someone try to start transaction under readonly mode, should be disabled.\n",
osd_name(osd_dt_dev(d)));
dump_stack();
RETURN(ERR_PTR(-EROFS));
}
sb_start_write(osd_sb(osd_dt_dev(d)));
OBD_ALLOC_PTR(oh);
if (!oh) {
sb_end_write(osd_sb(osd_dt_dev(d)));
RETURN(ERR_PTR(-ENOMEM));
}
th = &oh->ot_super;
th->th_dev = d;
th->th_result = 0;
INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
RETURN(th);
}
static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
struct thandle *th)
{
int rc;
ENTRY;
rc = dt_txn_hook_start(env, d, th);
RETURN(rc);
}
static void osd_trans_commit_cb(struct osd_thandle *oh, int result)
{
struct thandle *th = &oh->ot_super;
struct dt_txn_commit_cb *dcb, *tmp;
/* call per-transaction callbacks if any */
list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
dcb_linkage) {
LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
"commit callback entry: magic=%x name='%s'\n",
dcb->dcb_magic, dcb->dcb_name);
list_del_init(&dcb->dcb_linkage);
dcb->dcb_func(NULL, th, dcb, result);
}
}
static void osd_trans_stop_cb(struct osd_thandle *oh, int result)
{
struct thandle *th = &oh->ot_super;
struct dt_txn_commit_cb *dcb, *tmp;
/* call per-transaction stop callbacks if any */
list_for_each_entry_safe(dcb, tmp, &oh->ot_stop_dcb_list,
dcb_linkage) {
LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
"commit callback entry: magic=%x name='%s'\n",
dcb->dcb_magic, dcb->dcb_name);
list_del_init(&dcb->dcb_linkage);
dcb->dcb_func(NULL, th, dcb, result);
}
}
static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
struct thandle *th)
{
struct osd_device *osd = osd_dt_dev(th->th_dev);
struct osd_thandle *oh;
int rc = 0;
ENTRY;
oh = container_of(th, struct osd_thandle, ot_super);
rc = dt_txn_hook_stop(env, th);
if (rc)
CERROR("%s: failed in transaction hook: rc=%d\n",
osd_name(osd), rc);
osd_trans_stop_cb(oh, rc);
/* FIXME: using th->th_result? */
osd_trans_commit_cb(oh, rc);
sb_end_write(osd_sb(osd));
th->th_dev = NULL;
OBD_FREE_PTR(oh);
RETURN(rc);
}
static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
{
struct osd_thandle *oh = container_of(th, struct osd_thandle,
ot_super);
LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
LASSERT(dcb->dcb_func);
if (dcb->dcb_flags & DCB_TRANS_STOP)
list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
else
list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
return 0;
}
static void osd_conf_get(const struct lu_env *env,
const struct dt_device *dev,
struct dt_device_param *param)
{
struct osd_device *osd = osd_dt_dev(dev);
struct super_block *sb = osd_sb(osd);
param->ddp_max_name_len = NAME_MAX;
param->ddp_max_nlink = 1 << 31;
param->ddp_symlink_max = sb->s_blocksize;
param->ddp_mount_type = LDD_MT_WBCFS;
param->ddp_maxbytes = sb->s_maxbytes;
param->ddp_max_extent_blks = 1024;
param->ddp_extent_tax = 1024;
param->ddp_mntopts = MNTOPT_USERXATTR;
/* TODO: Add support for MNTOPT_ACL. */
param->ddp_max_ea_size = OBD_MAX_EA_SIZE;
param->ddp_inodespace = 1024;
param->ddp_brw_size = DT_DEF_BRW_SIZE;
param->ddp_has_lseek_data_hole = true;
}
static int osd_ro(const struct lu_env *env, struct dt_device *d)
{
int rc = -EOPNOTSUPP;
ENTRY;
CERROR("%s: cannot be set readonly: rc=%d\n",
osd_dt_dev(d)->od_svname, rc);
RETURN(rc);
}
static int osd_reserve_or_free_quota(const struct lu_env *env,
struct dt_device *dev,
struct lquota_id_info *qi)
{
RETURN(0);
}
static int osd_sync(const struct lu_env *env, struct dt_device *d)
{
RETURN(0);
}
static int osd_commit_async(const struct lu_env *env, struct dt_device *dev)
{
RETURN(0);
}
static const struct dt_device_operations osd_dt_ops = {
.dt_root_get = osd_root_get,
.dt_statfs = osd_statfs,
.dt_trans_create = osd_trans_create,
.dt_trans_start = osd_trans_start,
.dt_trans_stop = osd_trans_stop,
.dt_trans_cb_add = osd_trans_cb_add,
.dt_conf_get = osd_conf_get,
.dt_ro = osd_ro,
.dt_reserve_or_free_quota = osd_reserve_or_free_quota,
.dt_sync = osd_sync,
.dt_commit_async = osd_commit_async,
};
static void osd_umount(const struct lu_env *env, struct osd_device *dev)
{
ENTRY;
if (dev->od_mnt) {
shrink_dcache_sb(osd_sb(dev));
mntput(dev->od_mnt);
dev->od_mnt = NULL;
}
/* to be sure all delayed fput are finished. */
cfs_flush_delayed_fput();
EXIT;
}
static int __osd_device_init(const struct lu_env *env, struct osd_device *osd,
struct lustre_cfg *cfg)
{
struct lu_device *ld = osd2lu_dev(osd);
int cplen = 0;
int rc;
rc = lu_env_refill((struct lu_env *)env);
if (rc)
RETURN(rc);
ld->ld_ops = &osd_wbcfs_lu_ops;
osd->od_dt_dev.dd_ops = &osd_dt_ops;
cplen = strscpy(osd->od_svname, lustre_cfg_string(cfg, 4),
sizeof(osd->od_svname));
if (cplen < 0)
GOTO(out, rc = cplen);
/* -1 means that index is invalid. */
osd->od_index = -1;
rc = server_name2index(osd->od_svname, &osd->od_index, NULL);
if (rc == LDD_F_SV_TYPE_OST)
osd->od_is_ost = 1;
rc = osd_mount(env, osd, cfg);
if (rc)
GOTO(out, rc);
rc = osd_wbcfs_procfs_init(osd, osd->od_svname);
if (rc)
GOTO(out_mnt, rc);
rc = lu_site_init(&osd->od_site, ld);
if (rc)
GOTO(out_procfs, rc);
osd->od_site.ls_bottom_dev = ld;
rc = lu_site_init_finish(&osd->od_site);
if (rc)
GOTO(out_site, rc);
RETURN(0);
out_site:
lu_site_fini(&osd->od_site);
out_procfs:
osd_wbcfs_procfs_fini(osd);
out_mnt:
osd_umount(env, osd);
out:
return rc;
}
static struct lu_device *osd_device_alloc(const struct lu_env *env,
struct lu_device_type *t,
struct lustre_cfg *cfg)
{
struct osd_device *osd;
int rc;
ENTRY;
OBD_ALLOC_PTR(osd);
if (!osd)
RETURN(ERR_PTR(-ENOMEM));
rc = dt_device_init(&osd->od_dt_dev, t);
if (rc)
GOTO(out_free, rc);
rc = __osd_device_init(env, osd, cfg);
if (rc)
GOTO(out_dev_fini, rc);
RETURN(osd2lu_dev(osd));
out_dev_fini:
dt_device_fini(&osd->od_dt_dev);
out_free:
OBD_FREE_PTR(osd);
RETURN(ERR_PTR(rc));
}
static struct lu_device *osd_device_free(const struct lu_env *env,
struct lu_device *d)
{
struct osd_device *osd = osd_dev(d);
ENTRY;
/* XXX: make osd top device in order to release reference */
d->ld_site->ls_top_dev = d;
lu_site_purge(env, d->ld_site, -1);
lu_site_print(env, d->ld_site, &d->ld_site->ls_obj_hash.nelems,
D_ERROR, lu_cdebug_printer);
lu_site_fini(&osd->od_site);
dt_device_fini(&osd->od_dt_dev);
osd_wbcfs_procfs_fini(osd);
OBD_FREE_PTR(osd);
RETURN(NULL);
}
static int osd_device_init(const struct lu_env *env, struct lu_device *d,
const char *name, struct lu_device *next)
{
return 0;
}
static struct lu_device *osd_device_fini(const struct lu_env *env,
struct lu_device *d)
{
struct osd_device *osd = osd_dev(d);
ENTRY;
osd_shutdown(env, osd);
osd_umount(env, osd);
RETURN(NULL);
}
static const struct lu_device_type_operations osd_device_type_ops = {
.ldto_device_alloc = osd_device_alloc,
.ldto_device_free = osd_device_free,
.ldto_device_init = osd_device_init,
.ldto_device_fini = osd_device_fini
};
static struct lu_device_type osd_device_type = {
.ldt_tags = LU_DEVICE_DT,
.ldt_name = LUSTRE_OSD_WBCFS_NAME,
.ldt_ops = &osd_device_type_ops,
.ldt_ctx_tags = LCT_LOCAL
};
/* We use exports to track all osd users. */
static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
struct obd_device *obd, struct obd_uuid *cluuid,
struct obd_connect_data *data, void *localdata)
{
struct osd_device *osd = osd_dev(obd->obd_lu_dev);
struct lustre_handle conn;
int rc;
ENTRY;
CDEBUG(D_CONFIG, "connect #%d\n", atomic_read(&osd->od_connects));
rc = class_connect(&conn, obd, cluuid);
if (rc)
RETURN(rc);
*exp = class_conn2export(&conn);
atomic_inc(&osd->od_connects);
RETURN(0);
}
/*
* Once last export (we do not count self-export) disappeared,
* OSD can be released.
*/
static int osd_obd_disconnect(struct obd_export *exp)
{
struct obd_device *obd = exp->exp_obd;
struct osd_device *osd = osd_dev(obd->obd_lu_dev);
int rc, release = 0;
ENTRY;
/* Only disconnect the underlying layers on the final disconnect. */
release = atomic_dec_and_test(&osd->od_connects);
rc = class_disconnect(exp);
if (rc == 0 && release)
class_manual_cleanup(obd);
RETURN(rc);
}
static int osd_health_check(const struct lu_env *env, struct obd_device *obd)
{
struct osd_device *osd = osd_dev(obd->obd_lu_dev);
struct super_block *sb = osd_sb(osd);
return (!sb || sb->s_flags & SB_RDONLY);
}
static const struct obd_ops osd_obd_device_ops = {
.o_owner = THIS_MODULE,
.o_connect = osd_obd_connect,
.o_disconnect = osd_obd_disconnect,
.o_health_check = osd_health_check,
};
static int __init osd_init(void)
{
int rc;
rc = libcfs_setup();
if (rc)
return rc;
rc = lu_kmem_init(wbcfs_caches);
if (rc)
return rc;
rc = memfs_init();
if (rc)
GOTO(out_kmem, rc);
rc = class_register_type(&osd_obd_device_ops, NULL, true,
LUSTRE_OSD_WBCFS_NAME, &osd_device_type);
if (rc)
GOTO(out_memfs, rc);
#ifndef HAVE_FLUSH_DELAYED_FPUT
if (unlikely(cfs_flush_delayed_fput == NULL))
cfs_flush_delayed_fput =
cfs_kallsyms_lookup_name("flush_delayed_fput");
#endif
INIT_WORK(&flush_fput, osd_flush_fput);
return 0;
out_memfs:
memfs_fini();
out_kmem:
lu_kmem_fini(wbcfs_caches);
return rc;
}
static void __exit osd_exit(void)
{
cancel_work_sync(&flush_fput);
class_unregister_type(LUSTRE_OSD_WBCFS_NAME);
memfs_fini();
lu_kmem_fini(wbcfs_caches);
}
MODULE_AUTHOR("Yingjin Qian <qian@ddn.com>");
MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_WBCFS_NAME")");
MODULE_VERSION(LUSTRE_VERSION_STRING);
MODULE_LICENSE("GPL");
late_initcall_sync(osd_init);
module_exit(osd_exit);
