Viewing: osp_object.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* Lustre OST Proxy Device (OSP) is the agent on the local MDT for the OST
* or remote MDT.
*
* OSP object attributes cache
* ---------------------------
* OSP object is the stub of the remote OST-object or MDT-object. Both the
* attribute and the extended attributes are stored on the peer side remotely.
* It is inefficient to send RPC to peer to fetch those attributes when every
* get_attr()/get_xattr() called. For a large system, the LFSCK synchronous
* mode scanning is prohibitively inefficient.
*
* The OSP maintains the OSP object attributes cache to cache some
* attributes on the local MDT.
*
* The basic attributes, such as owner/mode/flags, are stored in the
* osp_object::opo_attr. The extended attributes will be stored
* as osp_xattr_entry. Every extended attribute has an independent
* osp_xattr_entry, and all the osp_xattr_entry are linked into the
* osp_object::opo_xattr_list. The OSP object attributes cache
* is protected by the osp_object::opo_lock.
*
* Not all OSP objects have an attributes cache because maintaining
* the cache requires some resources. Currently, the OSP object
* attributes cache will be initialized when the attributes or the
* extended attributes are pre-fetched via osp_declare_attr_get()
* or osp_declare_xattr_get(). That is usually for LFSCK purpose,
* but it also can be shared by others.
*
*
* XXX: NOT prepare out RPC for remote transaction. ((please refer to the
* comment of osp_trans_create() for remote transaction)
*
* According to our current transaction/dt_object_lock framework (to make
* the cross-MDTs modification for DNE1 to be workable), the transaction
* sponsor will start the transaction firstly, then try to acquire related
* dt_object_lock if needed. Under such rules, if we want to prepare the
* OUT RPC in the transaction declare phase, then related attr/xattr
* should be known without dt_object_lock. But such condition maybe not
* true for some remote transaction case. For example:
*
* For linkEA repairing (by LFSCK) case, before the LFSCK thread obtained
* the dt_object_lock on the target MDT-object, it cannot know whether
* the MDT-object has linkEA or not, neither invalid or not.
*
* Since the LFSCK thread cannot hold dt_object_lock before the remote
* transaction start (otherwise there will be some potential deadlock),
* it cannot prepare related OUT RPC for repairing during the declare
* phase as other normal transactions do.
*
* To resolve the trouble, we will make OSP to prepare related OUT RPC
* after remote transaction started, and trigger the remote updating
* (send RPC) when trans_stop. Then the up layer users, such as LFSCK,
* can follow the general rule to handle trans_start/dt_object_lock
* for repairing linkEA inconsistency without distinguishing remote
* MDT-object.
*
* In fact, above solution for remote transaction should be the normal
* model without considering DNE1. The trouble brought by DNE1 will be
* resolved in DNE2. At that time, this patch can be removed.
*
*
* Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
* Author: Mikhail Pershin <mike.tappro@intel.com>
*/
#define DEBUG_SUBSYSTEM S_MDS
#include <lustre_obdo.h>
#include <lustre_swab.h>
#include "osp_internal.h"
static inline __u32 osp_dev2node(struct osp_device *osp)
{
return osp->opd_storage->dd_lu_dev.ld_site->ld_seq_site->ss_node_id;
}
static inline const char *osp_dto2name(struct osp_object *obj)
{
return obj->opo_obj.do_lu.lo_dev->ld_obd->obd_name;
}
static inline bool is_ost_obj(struct lu_object *lo)
{
return !lu2osp_dev(lo->lo_dev)->opd_connect_mdt;
}
static inline void __osp_oac_xattr_assignment(struct osp_object *obj,
struct osp_xattr_entry *oxe,
const struct lu_buf *buf)
{
if (buf->lb_len > 0)
memcpy(oxe->oxe_value, buf->lb_buf, buf->lb_len);
oxe->oxe_vallen = buf->lb_len;
oxe->oxe_exist = 1;
oxe->oxe_ready = 1;
}
/**
* osp_object_assign_fid() - Assign FID to the OST object.
* @env: pointer to the thread context
* @d: pointer to the OSP device
* @o: pointer to the OSP object that the FID will be assigned to
*
* This function will assign the FID to the OST object of a striped file.
*/
static void osp_object_assign_fid(const struct lu_env *env,
struct osp_device *d, struct osp_object *o)
{
struct osp_thread_info *osi = osp_env_info(env);
LASSERT(fid_is_zero(lu_object_fid(&o->opo_obj.do_lu)));
LASSERT(o->opo_reserved);
o->opo_reserved = 0;
osp_precreate_get_fid(env, d, &osi->osi_fid);
lu_object_assign_fid(env, &o->opo_obj.do_lu, &osi->osi_fid);
}
#define OXE_DEFAULT_LEN 16
/**
* osp_oac_xattr_alloc() - Allocate osp_xattr_entry.
* @name: pointer to XATTR name
* @namelen: XATTR name len
* @vallen: XATTR value len
*
* If total size exceeds PAGE_SIZE, name and value will allocated in a
* separate buf, otherwise it's allocated inline.
*
* Return:
* * %oxe pointer on success
* * %NULL on failure
*/
static struct osp_xattr_entry *osp_oac_xattr_alloc(const char *name,
size_t namelen,
size_t vallen)
{
struct osp_xattr_entry *oxe;
size_t size;
if (!vallen)
vallen = OXE_DEFAULT_LEN;
size = sizeof(*oxe) + namelen + 1 + vallen;
if (likely(size <= PAGE_SIZE)) {
OBD_ALLOC(oxe, size);
if (unlikely(!oxe))
return NULL;
oxe->oxe_buflen = size;
oxe->oxe_value = oxe->oxe_name + namelen + 1;
} else {
char *buf;
OBD_ALLOC_LARGE(buf, vallen);
if (unlikely(!buf))
return NULL;
size -= vallen;
OBD_ALLOC(oxe, size);
if (unlikely(!oxe)) {
OBD_FREE(buf, size);
return NULL;
}
oxe->oxe_buflen = vallen;
oxe->oxe_value = buf;
oxe->oxe_largebuf = 1;
}
INIT_LIST_HEAD(&oxe->oxe_list);
oxe->oxe_namelen = namelen;
memcpy(oxe->oxe_name, name, namelen);
/* One ref is for the caller, the other is for the entry on the list. */
atomic_set(&oxe->oxe_ref, 2);
return oxe;
}
static void osp_oac_xattr_free(struct osp_xattr_entry *oxe)
{
LASSERT(list_empty(&oxe->oxe_list));
if (unlikely(oxe->oxe_largebuf)) {
OBD_FREE_LARGE(oxe->oxe_value, oxe->oxe_buflen);
OBD_FREE(oxe, sizeof(*oxe) + oxe->oxe_namelen + 1);
} else {
OBD_FREE(oxe, oxe->oxe_buflen);
}
}
/**
* osp_oac_xattr_put() - Release reference from the OSP object extended
* attribute entry.
* @oxe: pointer to the OSP object extended attribute entry.
*
* If it is the last reference, then free the entry.
*/
static inline void osp_oac_xattr_put(struct osp_xattr_entry *oxe)
{
if (atomic_dec_and_test(&oxe->oxe_ref))
osp_oac_xattr_free(oxe);
}
/**
* osp_oac_xattr_find_locked() - Find the named extended attribute in the OSP
* object attributes cache.
* @obj: pointer to the OSP object
* @name: the name of the extended attribute
* @namelen: the name length of the extended attribute
*
* The caller should take the osp_object::opo_lock before calling
* this function.
*
* Return:
* * %osp_xattr_entry pointer to the found extended attribute entry
* * %NULL if the specified extended attribute is not in the cache
*/
static struct osp_xattr_entry *
osp_oac_xattr_find_locked(struct osp_object *obj, const char *name,
size_t namelen)
{
struct osp_xattr_entry *oxe;
list_for_each_entry(oxe, &obj->opo_xattr_list, oxe_list) {
if (namelen == oxe->oxe_namelen &&
strncmp(name, oxe->oxe_name, namelen) == 0)
return oxe;
}
return NULL;
}
/**
* osp_oac_xattr_find() - Find the named extended attribute in the OSP object
* attributes cache.
* @obj: pointer to the OSP object
* @name: the name of the extended attribute
* @unlink: true if the extended attribute entry is to be removed from the cache
*
* Call osp_oac_xattr_find_locked() with the osp_object::opo_lock held.
*
* Return:
* * %osp_xattr_entry pointer to the found extended attribute entry
* * %NULL if the specified extended attribute is not in the cache
*/
static struct osp_xattr_entry *osp_oac_xattr_find(struct osp_object *obj,
const char *name, bool unlink)
{
struct osp_xattr_entry *oxe = NULL;
spin_lock(&obj->opo_lock);
oxe = osp_oac_xattr_find_locked(obj, name, strlen(name));
if (oxe) {
if (unlink)
list_del_init(&oxe->oxe_list);
else
atomic_inc(&oxe->oxe_ref);
}
spin_unlock(&obj->opo_lock);
return oxe;
}
/**
* osp_oac_xattr_find_or_add() - Find the named extended attribute in the OSP
* object attributes cache.
* @obj: pointer to the OSP object
* @name: the name of the extended attribute
* @len: the length of the extended attribute value
*
* If it is not in the cache, then add an empty entry (that will be
* filled later) to cache with the given name.
*
* Return:
* * %osp_xattr_entry pointer to the found/new-created extended attribute entry
* * %NULL if the specified extended attribute is not in the cache or fail to
* add new empty entry to the cache.
*/
static struct osp_xattr_entry *
osp_oac_xattr_find_or_add(struct osp_object *obj, const char *name, size_t len)
{
struct osp_xattr_entry *oxe;
struct osp_xattr_entry *tmp = NULL;
size_t namelen = strlen(name);
oxe = osp_oac_xattr_find(obj, name, false);
if (oxe)
return oxe;
oxe = osp_oac_xattr_alloc(name, namelen, len);
if (!oxe)
return NULL;
spin_lock(&obj->opo_lock);
tmp = osp_oac_xattr_find_locked(obj, name, namelen);
if (!tmp)
list_add_tail(&oxe->oxe_list, &obj->opo_xattr_list);
else
atomic_inc(&tmp->oxe_ref);
spin_unlock(&obj->opo_lock);
if (tmp) {
osp_oac_xattr_free(oxe);
oxe = tmp;
}
return oxe;
}
/**
* oxe_can_hold() - Check whether @oxe is large enough to hold the xattr value
* @oxe: pointer to the OSP object attributes cache xattr entry
* @len: xattr value size in bytes
*
* Return:
* * %true if xattr can fit in @oxe
* * %false if xattr can not fit in @oxe
*/
static inline bool oxe_can_hold(struct osp_xattr_entry *oxe, size_t len)
{
if (unlikely(oxe->oxe_largebuf))
return oxe->oxe_buflen >= len;
return oxe->oxe_buflen - oxe->oxe_namelen - 1 - sizeof(*oxe) >= len;
}
/**
* osp_oac_xattr_assignment() - Assign the cached OST-object's EA with the given
* value.
* @obj: pointer to the OSP object
* @oxe: pointer to the cached EA entry to be assigned
* @buf: pointer to the buffer with new EA value
*
* If the current EA entry in cache has not enough space to hold the new
* value, remove it, create a new one, then assign with the given value.
*
* Returns pointer to the new created EA entry in cache if current entry is not
* big enough; otherwise, the input @'oxe' will be returned.
*/
static struct osp_xattr_entry *
osp_oac_xattr_assignment(struct osp_object *obj, struct osp_xattr_entry *oxe,
const struct lu_buf *buf)
{
struct osp_xattr_entry *new = NULL;
struct osp_xattr_entry *old = NULL;
int namelen = oxe->oxe_namelen;
bool unlink_only = false;
if (!oxe_can_hold(oxe, buf->lb_len)) {
new = osp_oac_xattr_alloc(oxe->oxe_name, namelen, buf->lb_len);
if (likely(new)) {
__osp_oac_xattr_assignment(obj, new, buf);
} else {
unlink_only = true;
CWARN("%s: cannot update cached xattr %.*s of "DFID"\n",
osp_dto2name(obj), namelen, oxe->oxe_name,
PFID(lu_object_fid(&obj->opo_obj.do_lu)));
}
}
spin_lock(&obj->opo_lock);
old = osp_oac_xattr_find_locked(obj, oxe->oxe_name, namelen);
if (likely(old)) {
if (new) {
/* Unlink the 'old'. */
list_del_init(&old->oxe_list);
/* Drop the ref for 'old' on list. */
osp_oac_xattr_put(old);
/* Drop the ref for current using. */
osp_oac_xattr_put(oxe);
oxe = new;
/* Insert 'new' into list. */
list_add_tail(&new->oxe_list, &obj->opo_xattr_list);
} else if (unlink_only) {
/* Unlink the 'old'. */
list_del_init(&old->oxe_list);
/* Drop the ref for 'old' on list. */
osp_oac_xattr_put(old);
} else {
__osp_oac_xattr_assignment(obj, oxe, buf);
}
} else if (new) {
/* Drop the ref for current using. */
osp_oac_xattr_put(oxe);
oxe = new;
/* Someone unlinked the 'old' by race,
* insert the 'new' one into list. */
list_add_tail(&new->oxe_list, &obj->opo_xattr_list);
}
spin_unlock(&obj->opo_lock);
return oxe;
}
/**
* osp_get_attr_from_reply() - Parse the OSP object attribute from the RPC reply
* @env: pointer to the thread context
* @reply: pointer to the RPC reply
* @req: pointer to the RPC request
* @attr: pointer to buffer to hold the output attribute [out]
* @obj: pointer to the OSP object
* @index: the index of the attribute buffer in the reply
*
* If the attribute is valid, then it will be added to the OSP object
* attributes cache.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_get_attr_from_reply(const struct lu_env *env,
struct object_update_reply *reply,
struct ptlrpc_request *req,
struct lu_attr *attr,
struct osp_object *obj, int index)
{
struct osp_thread_info *osi = osp_env_info(env);
struct lu_buf *rbuf = &osi->osi_lb2;
struct obdo *lobdo = &osi->osi_obdo;
struct obdo *wobdo;
int rc;
rc = object_update_result_data_get(reply, rbuf, index);
if (rc < 0)
return rc;
wobdo = rbuf->lb_buf;
if (rbuf->lb_len != sizeof(*wobdo))
return -EPROTO;
LASSERT(req != NULL);
if (req_capsule_req_need_swab(&req->rq_pill))
lustre_swab_obdo(wobdo);
lustre_get_wire_obdo(NULL, lobdo, wobdo);
if (obj) {
spin_lock(&obj->opo_lock);
la_from_obdo(&obj->opo_attr, lobdo, lobdo->o_valid);
spin_unlock(&obj->opo_lock);
}
if (attr)
la_from_obdo(attr, lobdo, lobdo->o_valid);
return 0;
}
/**
* osp_attr_get_interpterer()- Interpreter function for getting OSP object
* attribute asynchronously.
* @env: pointer to the thread context
* @reply: pointer to the RPC reply
* @req: pointer to the RPC request
* @obj: pointer to the OSP object
* @data: pointer to buffer to hold the output attribute [out]
* @index: the index of the attribute buffer in the reply
* @rc: the result for handling the RPC
*
* Called to interpret the result of an async mode RPC for getting the
* OSP object attribute.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_attr_get_interpterer(const struct lu_env *env,
struct object_update_reply *reply,
struct ptlrpc_request *req,
struct osp_object *obj,
void *data, int index, int rc)
{
struct lu_attr *attr = data;
if (rc == 0) {
osp2lu_obj(obj)->lo_header->loh_attr |= LOHA_EXISTS;
obj->opo_non_exist = 0;
return osp_get_attr_from_reply(env, reply, req, NULL, obj,
index);
} else {
if (rc == -ENOENT) {
osp2lu_obj(obj)->lo_header->loh_attr &= ~LOHA_EXISTS;
obj->opo_non_exist = 1;
}
spin_lock(&obj->opo_lock);
attr->la_valid = 0;
spin_unlock(&obj->opo_lock);
}
return 0;
}
/**
* osp_declare_attr_get() - Implement OSP layer do_declare_attr_get() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
*
* Implement OSP layer dt_object_operations::do_declare_attr_get() interface.
* Declare that the caller will get attribute from the specified OST object.
*
* This function adds an Object Unified Target (OUT) sub-request to the per-OSP
* based shared asynchronous request queue. The osp_attr_get_interpterer()
* is registered as the interpreter function to handle the result of this
* sub-request.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_declare_attr_get(const struct lu_env *env, struct dt_object *dt)
{
struct osp_object *obj = dt2osp_obj(dt);
struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
int rc = 0;
mutex_lock(&osp->opd_async_requests_mutex);
rc = osp_insert_async_request(env, OUT_ATTR_GET, obj, 0, NULL, NULL,
&obj->opo_attr, sizeof(struct obdo),
osp_attr_get_interpterer);
mutex_unlock(&osp->opd_async_requests_mutex);
return rc;
}
/**
* osp_attr_get() - Implement OSP layer do_attr_get() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @attr: pointer to the buffer to hold the output attribute [out]
*
* Implement OSP layer dt_object_operations::do_attr_get() interface.
* Get attribute from the specified MDT/OST object.
*
* If the attribute is in the OSP object attributes cache, then return
* the cached attribute directly. Otherwise it will trigger an OUT RPC
* to the peer to get the attribute synchronously, if successful, add it
* to the OSP attributes cache. (\see lustre/osp/osp_trans.c for OUT RPC.)
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
int osp_attr_get(const struct lu_env *env, struct dt_object *dt,
struct lu_attr *attr)
{
struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
struct osp_object *obj = dt2osp_obj(dt);
struct dt_device *dev = &osp->opd_dt_dev;
struct osp_update_request *update;
struct object_update_reply *reply;
struct ptlrpc_request *req = NULL;
int invalidated, cache = 0, rc = 0;
ENTRY;
if (is_ost_obj(&dt->do_lu) && obj->opo_non_exist)
RETURN(-ENOENT);
if (obj->opo_destroyed)
RETURN(-ENOENT);
spin_lock(&obj->opo_lock);
if (obj->opo_attr.la_valid != 0 && !obj->opo_stale) {
*attr = obj->opo_attr;
spin_unlock(&obj->opo_lock);
RETURN(0);
}
spin_unlock(&obj->opo_lock);
update = osp_update_request_create(dev);
if (IS_ERR(update))
RETURN(PTR_ERR(update));
rc = OSP_UPDATE_RPC_PACK(env, out_attr_get_pack, update,
lu_object_fid(&dt->do_lu));
if (rc != 0) {
CERROR("%s: Insert update error "DFID": rc = %d\n",
dev->dd_lu_dev.ld_obd->obd_name,
PFID(lu_object_fid(&dt->do_lu)), rc);
GOTO(out_req, rc);
}
invalidated = atomic_read(&obj->opo_invalidate_seq);
rc = osp_remote_sync(env, osp, update, &req);
down_read(&obj->opo_invalidate_sem);
if (invalidated == atomic_read(&obj->opo_invalidate_seq)) {
/* no invalited has came so far, we can cache the attrs */
cache = 1;
}
if (rc != 0) {
if (rc == -ENOENT) {
osp2lu_obj(obj)->lo_header->loh_attr &= ~LOHA_EXISTS;
if (cache)
obj->opo_non_exist = 1;
} else {
CERROR("%s: osp_attr_get update error "DFID": rc = %d\n",
dev->dd_lu_dev.ld_obd->obd_name,
PFID(lu_object_fid(&dt->do_lu)), rc);
}
GOTO(out, rc);
}
osp2lu_obj(obj)->lo_header->loh_attr |= LOHA_EXISTS;
obj->opo_non_exist = 0;
reply = req_capsule_server_sized_get(&req->rq_pill,
&RMF_OUT_UPDATE_REPLY,
OUT_UPDATE_REPLY_SIZE);
if (reply == NULL || reply->ourp_magic != UPDATE_REPLY_MAGIC)
GOTO(out, rc = -EPROTO);
rc = osp_get_attr_from_reply(env, reply, req, attr,
cache ? obj : NULL, 0);
if (rc != 0)
GOTO(out, rc);
spin_lock(&obj->opo_lock);
if (cache)
obj->opo_stale = 0;
spin_unlock(&obj->opo_lock);
GOTO(out, rc);
out:
up_read(&obj->opo_invalidate_sem);
out_req:
if (req != NULL)
ptlrpc_req_put(req);
osp_update_request_destroy(env, update);
return rc;
}
/**
* osp_declare_attr_set() - Implement OSP layer do_declare_attr_set() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @attr: pointer to the attribute to be set
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_declare_attr_set() interface.
* If the transaction is not remote one, then declare the credits that will
* be used for the subsequent llog record for the object's attributes.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_declare_attr_set(const struct lu_env *env, struct dt_object *dt,
const struct lu_attr *attr, struct thandle *th)
{
struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
struct osp_object *o = dt2osp_obj(dt);
int rc;
if (is_only_remote_trans(th))
return osp_md_declare_attr_set(env, dt, attr, th);
/*
* Usually we don't allow server stack to manipulate size
* but there is a special case when striping is created
* late, after stripeless file got truncated to non-zero.
*
* In this case we do the following:
*
* 1) grab id in declare - this can lead to leaked OST objects
* but we don't currently have proper mechanism and the only
* options we have are to do truncate RPC holding transaction
* open (very bad) or to grab id in declare at cost of leaked
* OST object in same very rare unfortunate case (just bad)
* notice 1.6-2.0 do assignment outside of running transaction
* all the time, meaning many more chances for leaked objects.
*
* 2) send synchronous truncate RPC with just assigned id
*/
/* there are few places in MDD code still passing NULL
* XXX: to be fixed soon */
if (attr == NULL)
RETURN(0);
if (attr->la_valid & LA_SIZE && attr->la_size > 0 &&
fid_is_zero(lu_object_fid(&o->opo_obj.do_lu))) {
LASSERT(!dt_object_exists(dt));
osp_object_assign_fid(env, d, o);
rc = osp_object_truncate(env, dt, attr->la_size);
if (rc != 0)
RETURN(rc);
}
if (!(attr->la_valid & LA_REMOTE_ATTR_SET))
RETURN(0);
/* track all UID/GID, projid, and layout version changes via llog */
rc = osp_sync_declare_add(env, o, MDS_SETATTR64_REC, th);
return 0;
}
/**
* osp_attr_set() - Implement OSP layer do_attr_set() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @attr: pointer to the attribute to be set
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_attr_set() interface.
* Set attribute to the specified OST object.
*
* If the transaction is a remote one, then add OUT_ATTR_SET sub-request
* in the OUT RPC that will be flushed when the remote transaction stop.
* Otherwise, it will generate a MDS_SETATTR64_REC record in the llog that
* will be handled by a dedicated thread asynchronously.
*
* If the attribute entry exists in the OSP object attributes cache,
* then update the cached attribute according to given attribute.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_attr_set(const struct lu_env *env, struct dt_object *dt,
const struct lu_attr *attr, struct thandle *th)
{
struct osp_object *o = dt2osp_obj(dt);
int rc = 0;
ENTRY;
/* we're interested in uid/gid/projid/layout version changes,
* and also specific setting of enc flag
*/
if (!(attr->la_valid & LA_REMOTE_ATTR_SET) &&
!(attr->la_valid == LA_FLAGS &&
attr->la_flags == LUSTRE_ENCRYPT_FL))
RETURN(0);
if (!is_only_remote_trans(th)) {
if (attr->la_flags & LUSTRE_SET_SYNC_FL) {
struct ptlrpc_request *req = NULL;
struct osp_update_request *update = NULL;
struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
update = osp_update_request_create(&osp->opd_dt_dev);
if (IS_ERR(update))
RETURN(PTR_ERR(update));
rc = OSP_UPDATE_RPC_PACK(env, out_attr_set_pack, update,
lu_object_fid(&dt->do_lu),
attr);
if (rc != 0) {
CERROR("%s: update error "DFID": rc = %d\n",
osp->opd_obd->obd_name,
PFID(lu_object_fid(&dt->do_lu)), rc);
osp_update_request_destroy(env, update);
RETURN(rc);
}
rc = osp_remote_sync(env, osp, update, &req);
if (req != NULL)
ptlrpc_req_put(req);
osp_update_request_destroy(env, update);
} else {
struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
rc = osp_sync_add(env, o, MDS_SETATTR64_REC, th, attr);
/* send layout version to OST ASAP */
if (attr->la_valid & LA_LAYOUT_VERSION)
wake_up(&osp->opd_sync_waitq);
/* XXX: send new uid/gid to OST ASAP? */
}
} else {
struct lu_attr *la;
/* It is for OST-object attr_set directly without updating
* local MDT-object attribute. It is usually used by LFSCK. */
rc = osp_md_attr_set(env, dt, attr, th);
CDEBUG(D_INFO, "(1) set attr "DFID": rc = %d\n",
PFID(&dt->do_lu.lo_header->loh_fid), rc);
if (rc != 0)
RETURN(rc);
/* Update the OSP object attributes cache. */
la = &o->opo_attr;
spin_lock(&o->opo_lock);
if (attr->la_valid & LA_UID) {
la->la_uid = attr->la_uid;
la->la_valid |= LA_UID;
}
if (attr->la_valid & LA_GID) {
la->la_gid = attr->la_gid;
la->la_valid |= LA_GID;
}
if (attr->la_valid & LA_PROJID) {
la->la_projid = attr->la_projid;
la->la_valid |= LA_PROJID;
}
spin_unlock(&o->opo_lock);
}
RETURN(rc);
}
/**
* osp_xattr_get_interpterer() - Interpreter function for getting OSP object
* extended attribute asynchronously
* @env: pointer to the thread context
* @reply: pointer to the RPC reply
* @req: pointer to the RPC request
* @obj: pointer to the OSP object
* @data: pointer to OSP object attributes cache [out]
* @index: the index of the attribute buffer in the reply
* @rc: the result for handling the RPC
*
* Called to interpret the result of an async mode RPC for getting the
* OSP object extended attribute.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_xattr_get_interpterer(const struct lu_env *env,
struct object_update_reply *reply,
struct ptlrpc_request *req,
struct osp_object *obj,
void *data, int index, int rc)
{
struct osp_xattr_entry *oxe = data;
spin_lock(&obj->opo_lock);
if (rc >= 0) {
struct lu_buf *rbuf = &osp_env_info(env)->osi_lb2;
rc = object_update_result_data_get(reply, rbuf, index);
if (rc == -ENOENT || rc == -ENODATA || rc == 0) {
oxe->oxe_exist = 0;
oxe->oxe_ready = 1;
goto unlock;
}
if (unlikely(rc < 0) || !oxe_can_hold(oxe, rbuf->lb_len)) {
oxe->oxe_ready = 0;
goto unlock;
}
__osp_oac_xattr_assignment(obj, oxe, rbuf);
} else if (rc == -ENOENT || rc == -ENODATA) {
oxe->oxe_exist = 0;
oxe->oxe_ready = 1;
} else {
oxe->oxe_ready = 0;
}
unlock:
spin_unlock(&obj->opo_lock);
/* Put the reference obtained in the osp_declare_xattr_get(). */
osp_oac_xattr_put(oxe);
return 0;
}
/**
* osp_declare_xattr_get() - Implement OSP do_declare_xattr_get() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @buf: pointer to the lu_buf to hold the extended attribute [out]
* @name: the name for the expected extended attribute
*
* Implement OSP dt_object_operations::do_declare_xattr_get() interface.
* Declare that the caller will get extended attribute from the specified
* OST object.
*
* This function will add an OUT_XATTR_GET sub-request to the per OSP
* based shared asynchronous request queue with the interpreter function:
* osp_xattr_get_interpterer().
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_declare_xattr_get(const struct lu_env *env, struct dt_object *dt,
struct lu_buf *buf, const char *name)
{
struct osp_object *obj = dt2osp_obj(dt);
struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
struct osp_xattr_entry *oxe;
int rc = 0;
__u16 len;
LASSERT(buf != NULL);
LASSERT(name != NULL);
if (unlikely(buf->lb_len == 0))
return -EINVAL;
oxe = osp_oac_xattr_find_or_add(obj, name, buf->lb_len);
if (oxe == NULL)
return -ENOMEM;
len = strlen(name) + 1;
mutex_lock(&osp->opd_async_requests_mutex);
rc = osp_insert_async_request(env, OUT_XATTR_GET, obj, 1,
&len, (const void **)&name,
oxe, buf->lb_len,
osp_xattr_get_interpterer);
if (rc != 0) {
mutex_unlock(&osp->opd_async_requests_mutex);
osp_oac_xattr_put(oxe);
} else {
struct osp_update_request *our;
struct osp_update_request_sub *ours;
/* XXX: Currently, we trigger the batched async OUT
* RPC via dt_declare_xattr_get(). It is not
* perfect solution, but works well now.
*
* We will improve it in the future. */
our = osp->opd_async_requests;
ours = osp_current_object_update_request(our);
if (ours != NULL && ours->ours_req != NULL &&
ours->ours_req->ourq_count > 0) {
osp->opd_async_requests = NULL;
mutex_unlock(&osp->opd_async_requests_mutex);
rc = osp_unplug_async_request(env, osp, our);
} else {
mutex_unlock(&osp->opd_async_requests_mutex);
}
}
return rc;
}
/**
* osp_xattr_get() - Implement OSP layer do_xattr_get() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @buf: pointer to the lu_buf to hold the extended attribute [out]
* @name: the name for the expected extended attribute
*
* Implement OSP layer dt_object_operations::do_xattr_get() interface.
* Get extended attribute from the specified MDT/OST object.
*
* If the extended attribute is in the OSP object attributes cache, then
* return the cached extended attribute directly. Otherwise it will get
* the extended attribute synchronously, if successful, add it to the OSP
* attributes cache. (see lustre/osp/osp_trans.c for OUT RPC.)
*
* There is a race condition: some other thread has added the named extended
* attributed entry to the OSP object attributes cache during the current
* OUT_XATTR_GET handling. If such case happens, the OSP will replace the
* (just) existing extended attribute entry with the new replied one.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
int osp_xattr_get(const struct lu_env *env, struct dt_object *dt,
struct lu_buf *buf, const char *name)
{
struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
struct osp_object *obj = dt2osp_obj(dt);
struct dt_device *dev = &osp->opd_dt_dev;
struct lu_buf *rbuf = &osp_env_info(env)->osi_lb2;
struct osp_update_request *update = NULL;
struct ptlrpc_request *req = NULL;
struct object_update_reply *reply;
struct osp_xattr_entry *oxe = NULL;
const char *dname = osp_dto2name(obj);
int invalidated, rc = 0;
ENTRY;
LASSERT(buf != NULL);
LASSERT(name != NULL);
if (CFS_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NETWORK) &&
osp->opd_index == cfs_fail_val) {
if (is_ost_obj(&dt->do_lu)) {
if (osp_dev2node(osp) == cfs_fail_val)
RETURN(-ENOTCONN);
} else {
if (strcmp(name, XATTR_NAME_LINK) == 0)
RETURN(-ENOTCONN);
}
}
if (unlikely(obj->opo_non_exist))
RETURN(-ENOENT);
invalidated = atomic_read(&obj->opo_invalidate_seq);
oxe = osp_oac_xattr_find(obj, name, false);
if (oxe != NULL) {
spin_lock(&obj->opo_lock);
if (oxe->oxe_ready) {
if (!oxe->oxe_exist)
GOTO(unlock, rc = -ENODATA);
if (buf->lb_buf == NULL)
GOTO(unlock, rc = oxe->oxe_vallen);
if (buf->lb_len < oxe->oxe_vallen)
GOTO(unlock, rc = -ERANGE);
memcpy(buf->lb_buf, oxe->oxe_value,
oxe->oxe_vallen);
GOTO(unlock, rc = oxe->oxe_vallen);
unlock:
spin_unlock(&obj->opo_lock);
osp_oac_xattr_put(oxe);
return rc;
}
spin_unlock(&obj->opo_lock);
}
update = osp_update_request_create(dev);
if (IS_ERR(update))
GOTO(out_req, rc = PTR_ERR(update));
rc = OSP_UPDATE_RPC_PACK(env, out_xattr_get_pack, update,
lu_object_fid(&dt->do_lu), name, buf->lb_len);
if (rc != 0) {
CERROR("%s: Insert update error "DFID": rc = %d\n",
dname, PFID(lu_object_fid(&dt->do_lu)), rc);
GOTO(out_req, rc);
}
rc = osp_remote_sync(env, osp, update, &req);
down_read(&obj->opo_invalidate_sem);
if (invalidated != atomic_read(&obj->opo_invalidate_seq)) {
/* invalidated has been requested, we can't cache the result */
if (rc < 0) {
if (rc == -ENOENT)
dt->do_lu.lo_header->loh_attr &= ~LOHA_EXISTS;
GOTO(out, rc);
}
reply = req_capsule_server_sized_get(&req->rq_pill,
&RMF_OUT_UPDATE_REPLY,
OUT_UPDATE_REPLY_SIZE);
if (reply->ourp_magic != UPDATE_REPLY_MAGIC) {
CERROR("%s: Wrong version %x expected %x "DFID
": rc = %d\n", dname, reply->ourp_magic,
UPDATE_REPLY_MAGIC,
PFID(lu_object_fid(&dt->do_lu)), -EPROTO);
GOTO(out, rc = -EPROTO);
}
rc = object_update_result_data_get(reply, rbuf, 0);
GOTO(out, rc);
}
if (rc < 0) {
if (rc == -ENOENT) {
dt->do_lu.lo_header->loh_attr &= ~LOHA_EXISTS;
obj->opo_non_exist = 1;
}
if (oxe == NULL)
oxe = osp_oac_xattr_find_or_add(obj, name, buf->lb_len);
if (oxe == NULL) {
CWARN("%s: Fail to add xattr (%s) to cache for "
DFID" (1): rc = %d\n", dname, name,
PFID(lu_object_fid(&dt->do_lu)), rc);
GOTO(out, rc);
}
spin_lock(&obj->opo_lock);
if (rc == -ENOENT || rc == -ENODATA) {
oxe->oxe_exist = 0;
oxe->oxe_ready = 1;
} else {
oxe->oxe_ready = 0;
}
spin_unlock(&obj->opo_lock);
GOTO(out, rc);
}
reply = req_capsule_server_sized_get(&req->rq_pill,
&RMF_OUT_UPDATE_REPLY,
OUT_UPDATE_REPLY_SIZE);
if (reply->ourp_magic != UPDATE_REPLY_MAGIC) {
CERROR("%s: Wrong version %x expected %x "DFID": rc = %d\n",
dname, reply->ourp_magic, UPDATE_REPLY_MAGIC,
PFID(lu_object_fid(&dt->do_lu)), -EPROTO);
GOTO(out, rc = -EPROTO);
}
rc = object_update_result_data_get(reply, rbuf, 0);
if (rc < 0 || rbuf->lb_len == 0) {
if (oxe == NULL && rc == -ENODATA) {
oxe = osp_oac_xattr_find_or_add(obj, name, buf->lb_len);
if (oxe == NULL) {
rc = -ENOMEM;
CWARN("%s: Fail to add xattr (%s) to cache for "
DFID" (1): rc = %d\n", dname, name,
PFID(lu_object_fid(&dt->do_lu)), rc);
GOTO(out, rc);
}
}
if (oxe) {
spin_lock(&obj->opo_lock);
if (unlikely(rc == -ENODATA)) {
oxe->oxe_exist = 0;
oxe->oxe_ready = 1;
} else {
oxe->oxe_ready = 0;
}
spin_unlock(&obj->opo_lock);
}
GOTO(out, rc);
}
/* For detecting EA size. */
if (!buf->lb_buf)
GOTO(out, rc);
if (!oxe) {
oxe = osp_oac_xattr_find_or_add(obj, name, rbuf->lb_len);
if (!oxe) {
CWARN("%s: Fail to add xattr (%s) to cache for "
DFID" (2): rc = %d\n",
dname, name, PFID(lu_object_fid(&dt->do_lu)), rc);
GOTO(out, rc);
}
}
oxe = osp_oac_xattr_assignment(obj, oxe, rbuf);
GOTO(out, rc);
out:
up_read(&obj->opo_invalidate_sem);
out_req:
if (rc > 0 && buf->lb_buf) {
if (unlikely(buf->lb_len < rbuf->lb_len))
rc = -ERANGE;
else
memcpy(buf->lb_buf, rbuf->lb_buf, rbuf->lb_len);
}
if (req)
ptlrpc_req_put(req);
if (update && !IS_ERR(update))
osp_update_request_destroy(env, update);
if (oxe)
osp_oac_xattr_put(oxe);
return rc;
}
/**
* osp_declare_xattr_set() - Implement OSP layer do_declare_xattr_set() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @attr: pointer to the attribute to be set
* @buf: pointer to the lu_buf to hold the extended attribute
* @name: the name of the extended attribute to be set
* @flag: to indicate the detailed set operation: LU_XATTR_CREATE
* or LU_XATTR_REPLACE or others
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_declare_xattr_set() interface.
* Declare that the caller will set extended attribute to the specified
* MDT/OST object.
*
* If it is non-remote transaction, it will add an OUT_XATTR_SET sub-request
* to the OUT RPC that will be flushed when the transaction start. And if the
* OSP attributes cache is initialized, then check whether the name extended
* attribute entry exists in the cache or not. If yes, replace it; otherwise,
* add the extended attribute to the cache.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
int osp_declare_xattr_set(const struct lu_env *env, struct dt_object *dt,
const struct lu_attr *attr,
const struct lu_buf *buf, const char *name,
int flag, struct thandle *th)
{
return osp_trans_update_request_create(th);
}
/**
* osp_xattr_set() - Implement OSP layer do_xattr_set() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @buf: pointer to the lu_buf to hold the extended attribute
* @name: the name of the extended attribute to be set
* @fl: to indicate the detailed set operation: LU_XATTR_CREATE
* or LU_XATTR_REPLACE or others
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_xattr_set() interface.
* Set extended attribute to the specified MDT/OST object.
*
* Add an OUT_XATTR_SET sub-request into the OUT RPC that will be flushed in
* the transaction stop. And if the OSP attributes cache is initialized, then
* check whether the name extended attribute entry exists in the cache or not.
* If yes, replace it; otherwise, add the extended attribute to the cache.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
int osp_xattr_set(const struct lu_env *env, struct dt_object *dt,
const struct lu_buf *buf, const char *name, int fl,
struct thandle *th)
{
struct osp_object *o = dt2osp_obj(dt);
struct osp_update_request *update;
struct osp_xattr_entry *oxe;
int rc;
ENTRY;
update = thandle_to_osp_update_request(th);
LASSERT(update != NULL);
CDEBUG(D_INODE, DFID" set xattr '%s' with size %zd\n",
PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
rc = OSP_UPDATE_RPC_PACK(env, out_xattr_set_pack, update,
lu_object_fid(&dt->do_lu), buf, name, fl);
if (rc != 0)
RETURN(rc);
/* Do not cache linkEA that may be self-adjusted by peers
* under EA overflow case. */
if (strcmp(name, XATTR_NAME_LINK) == 0) {
oxe = osp_oac_xattr_find(o, name, true);
if (oxe != NULL)
osp_oac_xattr_put(oxe);
RETURN(0);
}
oxe = osp_oac_xattr_find_or_add(o, name, buf->lb_len);
if (oxe == NULL) {
CWARN("%s: cannot cache xattr '%s' of "DFID"\n",
osp_dto2name(o), name, PFID(lu_object_fid(&dt->do_lu)));
RETURN(0);
}
oxe = osp_oac_xattr_assignment(o, oxe, buf);
if (oxe)
osp_oac_xattr_put(oxe);
RETURN(0);
}
/**
* osp_declare_xattr_del() - Implement OSP layer do_declare_xattr_del() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @name: the name of the extended attribute to be set
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_declare_xattr_del() interface.
* Declare that the caller will delete extended attribute on the specified
* MDT/OST object.
*
* If it is non-remote transaction, it will add an OUT_XATTR_DEL sub-request
* to the OUT RPC that will be flushed when the transaction start. And if the
* name extended attribute entry exists in the OSP attributes cache, then remove
* it from the cache.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
int osp_declare_xattr_del(const struct lu_env *env, struct dt_object *dt,
const char *name, struct thandle *th)
{
return osp_trans_update_request_create(th);
}
/**
* osp_xattr_del() - Implement OSP layer do_xattr_del() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @name: the name of the extended attribute to be set
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_xattr_del() interface.
* Delete extended attribute on the specified MDT/OST object.
*
* If it is remote transaction, it will add an OUT_XATTR_DEL sub-request into
* the OUT RPC that will be flushed when the transaction stop. And if the name
* extended attribute entry exists in the OSP attributes cache, then remove it
* from the cache.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
int osp_xattr_del(const struct lu_env *env, struct dt_object *dt,
const char *name, struct thandle *th)
{
struct osp_update_request *update;
const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
struct osp_object *o = dt2osp_obj(dt);
struct osp_xattr_entry *oxe;
int rc;
update = thandle_to_osp_update_request(th);
LASSERT(update != NULL);
rc = OSP_UPDATE_RPC_PACK(env, out_xattr_del_pack, update, fid, name);
if (rc != 0)
return rc;
oxe = osp_oac_xattr_find(o, name, true);
if (oxe != NULL)
/* Drop the ref for entry on list. */
osp_oac_xattr_put(oxe);
return 0;
}
void osp_obj_invalidate_cache(struct osp_object *obj)
{
struct osp_xattr_entry *oxe;
struct osp_xattr_entry *tmp;
struct list_head tmplist;
INIT_LIST_HEAD(&tmplist);
spin_lock(&obj->opo_lock);
list_for_each_entry_safe(oxe, tmp, &obj->opo_xattr_list, oxe_list) {
oxe->oxe_ready = 0;
list_move(&oxe->oxe_list, &tmplist);
}
obj->opo_attr.la_valid = 0;
spin_unlock(&obj->opo_lock);
/* free outside of the spinlock as VMALLOC_FREE() can sleep */
list_for_each_entry_safe(oxe, tmp, &tmplist, oxe_list) {
list_del_init(&oxe->oxe_list);
osp_oac_xattr_put(oxe);
}
}
/**
* osp_invalidate() - Implement OSP layer do_invalidate() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
*
* Implement OSP layer dt_object_operations::do_invalidate() interface.
* Invalidate attributes cached on the specified MDT/OST object.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
int osp_invalidate(const struct lu_env *env, struct dt_object *dt)
{
struct osp_object *obj = dt2osp_obj(dt);
ENTRY;
CDEBUG(D_HA, "Invalidate osp_object "DFID"\n",
PFID(lu_object_fid(&dt->do_lu)));
/* serialize attr/EA set vs. invalidation */
down_write(&obj->opo_invalidate_sem);
/* this should invalidate all in-flights */
atomic_inc(&obj->opo_invalidate_seq);
spin_lock(&obj->opo_lock);
/* do not mark new objects stale */
if (obj->opo_attr.la_valid)
obj->opo_stale = 1;
obj->opo_non_exist = 0;
spin_unlock(&obj->opo_lock);
osp_obj_invalidate_cache(obj);
up_write(&obj->opo_invalidate_sem);
RETURN(0);
}
bool osp_check_stale(struct dt_object *dt)
{
struct osp_object *obj = dt2osp_obj(dt);
if (is_ost_obj(&dt->do_lu) && obj->opo_non_exist)
return true;
return obj->opo_stale;
}
/**
* osp_declare_create() - Implement OSP layer do_declare_create() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @attr: the attribute for the object to be created
* @hint: pointer to the hint for creating the object, such as the parent object
* @dof: pointer to the dt_object_format for help the creation
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_declare_create() interface.
* Declare that the caller will create the OST object.
*
* If the transaction is a remote transaction and the FID for the OST-object
* has been assigned already, then handle it as creating (remote) MDT object
* via osp_md_declare_create(). This function is usually used for LFSCK
* to re-create the lost OST object. Otherwise, if it is not replay case, the
* OSP will reserve pre-created object for the subsequent create operation;
* if the MDT side cached pre-created objects are less than some threshold,
* then it will wakeup the pre-create thread.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_declare_create(const struct lu_env *env, struct dt_object *dt,
struct lu_attr *attr,
struct dt_allocation_hint *hint,
struct dt_object_format *dof, struct thandle *th)
{
struct osp_thread_info *osi = osp_env_info(env);
struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
struct osp_object *o = dt2osp_obj(dt);
const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
struct thandle *local_th;
int rc = 0;
ENTRY;
if (is_only_remote_trans(th) && !fid_is_zero(fid)) {
LASSERT(fid_is_sane(fid));
rc = osp_md_declare_create(env, dt, attr, hint, dof, th);
RETURN(rc);
}
/* should happen to non-0 OSP only so that at least one object
* has been already declared in the scenario and LOD should
* cleanup that */
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_OSC_CREATE_FAIL) && d->opd_index == 1)
RETURN(-ENOSPC);
LASSERT(d->opd_last_used_oid_file);
/*
* There can be gaps in precreated ids and record to unlink llog
* XXX: we do not handle gaps yet, implemented before solution
* was found to be racy, so we disabled that. there is no
* point in making useless but expensive llog declaration.
*/
/* rc = osp_sync_declare_add(env, o, MDS_UNLINK64_REC, th); */
local_th = osp_get_storage_thandle(env, th, d);
if (IS_ERR(local_th))
RETURN(PTR_ERR(local_th));
if (unlikely(!fid_is_zero(fid))) {
/* replay case: caller knows fid */
osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, NULL,
d->opd_index);
rc = dt_declare_record_write(env, d->opd_last_used_oid_file,
&osi->osi_lb, osi->osi_off,
local_th);
RETURN(rc);
}
/*
* in declaration we need to reserve object so that we don't block
* awaiting precreation RPC to complete
*/
rc = osp_precreate_reserve(env, d, !hint || hint->dah_can_block);
/*
* we also need to declare update to local "last used id" file for
* recovery if object isn't used for a reason, we need to release
* reservation, this can be made in osd_object_release()
*/
if (rc == 0) {
/* mark id is reserved: in create we don't want to talk
* to OST */
LASSERT(o->opo_reserved == 0);
o->opo_reserved = 1;
/* common for all OSPs file hystorically */
osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, NULL,
d->opd_index);
rc = dt_declare_record_write(env, d->opd_last_used_oid_file,
&osi->osi_lb, osi->osi_off,
local_th);
} else {
/* not needed in the cache anymore */
set_bit(LU_OBJECT_HEARD_BANSHEE,
&dt->do_lu.lo_header->loh_flags);
}
RETURN(rc);
}
/**
* osp_create() - Implement OSP layer do_create() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @attr: the attribute for the object to be created
* @hint: pointer to the hint for creating the object, such as the parent object
* @dof: pointer to the dt_object_format for help the creation
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_create() interface.
* Create the OST object.
*
* If the transaction is a remote transaction and the FID for the OST-object
* has been assigned already, then handle it as handling MDT object via the
* osp_md_create(). For other cases, the OSP will assign FID to the
* object to be created, and update last_used Object ID (OID) file.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_create(const struct lu_env *env, struct dt_object *dt,
struct lu_attr *attr, struct dt_allocation_hint *hint,
struct dt_object_format *dof, struct thandle *th)
{
struct osp_thread_info *osi = osp_env_info(env);
struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
struct osp_object *o = dt2osp_obj(dt);
struct lu_fid *fid = &osi->osi_fid;
struct thandle *local_th;
bool replay = false;
int rc = 0;
ENTRY;
if (is_only_remote_trans(th) &&
!fid_is_zero(lu_object_fid(&dt->do_lu))) {
LASSERT(fid_is_sane(lu_object_fid(&dt->do_lu)));
rc = osp_md_create(env, dt, attr, hint, dof, th);
if (rc == 0)
o->opo_non_exist = 0;
RETURN(rc);
}
o->opo_non_exist = 0;
if (o->opo_reserved) {
/* regular case, fid is assigned holding transaction open */
osp_object_assign_fid(env, d, o);
} else {
replay = true;
}
memcpy(fid, lu_object_fid(&dt->do_lu), sizeof(*fid));
LASSERTF(fid_is_sane(fid), "fid for osp_object %px is insane"DFID"!\n",
o, PFID(fid));
if (replay) {
/* special case, id was assigned outside of transaction
* see comments in osp_declare_attr_set */
LASSERT(d->opd_pre != NULL);
spin_lock(&d->opd_pre_lock);
osp_update_last_fid(d, fid, true);
spin_unlock(&d->opd_pre_lock);
}
CDEBUG(D_INODE, "fid for osp_object %p is "DFID"\n", o, PFID(fid));
/* If the precreate ends, it means it will be ready to rollover to
* the new sequence soon, all the creation should be synchronized,
* otherwise during replay, the replay fid will be inconsistent with
* last_used/create fid */
if (osp_precreate_end_seq(d) && osp_is_fid_client(d))
th->th_sync = 1;
local_th = osp_get_storage_thandle(env, th, d);
if (IS_ERR(local_th))
RETURN(PTR_ERR(local_th));
/*
* it's OK if the import is inactive by this moment - id was created
* by OST earlier, we just need to maintain it consistently on the disk
* once import is reconnected, OSP will claim this and other objects
* used and OST either keep them, if they exist or recreate
*/
/* we might have lost precreated objects */
if (unlikely(d->opd_gap_count > 0)) {
LASSERT(d->opd_pre != NULL);
spin_lock(&d->opd_pre_lock);
if (d->opd_gap_count > 0) {
int count = d->opd_gap_count;
rc = ostid_set_id(&osi->osi_oi,
fid_oid(&d->opd_gap_start_fid));
if (rc) {
spin_unlock(&d->opd_pre_lock);
RETURN(rc);
}
d->opd_gap_count = 0;
spin_unlock(&d->opd_pre_lock);
CDEBUG(D_HA, "Writing gap "DFID"+%d in llog\n",
PFID(&d->opd_gap_start_fid), count);
/* real gap handling is disabled intil ORI-692 will be
* fixed, now we only report gaps */
} else {
spin_unlock(&d->opd_pre_lock);
}
}
/* Only need update last_used oid file, seq file will only be update
* during seq rollover */
osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off,
&d->opd_last_id, d->opd_index);
rc = dt_record_write(env, d->opd_last_used_oid_file, &osi->osi_lb,
&osi->osi_off, local_th);
CDEBUG(D_HA, "%s: Wrote last used FID: "DFID", index %d: %d\n",
d->opd_obd->obd_name, PFID(fid), d->opd_index, rc);
RETURN(rc);
}
/**
* osp_declare_destroy() - Implement OSP layer do_declare_destroy() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object to be destroyed
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_declare_destroy() interface.
* Declare that the caller will destroy the specified OST object.
*
* The OST object destroy will be handled via llog asynchronously. This
* function will declare the credits for generating MDS_UNLINK64_REC llog.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_declare_destroy(const struct lu_env *env, struct dt_object *dt,
struct thandle *th)
{
struct osp_object *o = dt2osp_obj(dt);
struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
int rc = 0;
ENTRY;
LASSERT(!osp->opd_connect_mdt);
if (!CFS_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ))
rc = osp_sync_declare_add(env, o, MDS_UNLINK64_REC, th);
RETURN(rc);
}
/**
* osp_destroy() - Implement OSP layer do_destroy() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object to be destroyed
* @th: pointer to the transaction handler
*
* Implement OSP layer dt_object_operations::do_destroy() interface.
* Destroy the specified OST object.
*
* The OSP generates a MDS_UNLINK64_REC record in the llog. There
* will be some dedicated thread to handle the llog asynchronously.
*
* It also marks the object as non-cached.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_destroy(const struct lu_env *env, struct dt_object *dt,
struct thandle *th)
{
struct osp_object *o = dt2osp_obj(dt);
struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
int rc = 0;
ENTRY;
o->opo_non_exist = 1;
LASSERT(!osp->opd_connect_mdt);
if (!CFS_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ)) {
/* once transaction is committed put proper command on
* the queue going to our OST. */
rc = osp_sync_add(env, o, MDS_UNLINK64_REC, th, NULL);
if (rc < 0)
RETURN(rc);
}
/* not needed in cache any more */
set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
RETURN(rc);
}
/**
* osp_it_init() - Initialize the OSP layer index iteration.
* @env: pointer to the thread context
* @dt: pointer to the index object to be iterated
* @attr: unused
*
* Return:
* * %pointer to the iteration structure
* * %negative error number on failure
*/
struct dt_it *osp_it_init(const struct lu_env *env, struct dt_object *dt,
__u32 attr)
{
struct osp_it *it;
OBD_ALLOC_PTR(it);
if (it == NULL)
return ERR_PTR(-ENOMEM);
it->ooi_pos_ent = -1;
it->ooi_obj = dt;
it->ooi_attr = attr;
return (struct dt_it *)it;
}
/**
* osp_it_fini() - Finalize the OSP layer index iteration.
* @env: pointer to the thread context
* @di: pointer to the iteration structure
*/
void osp_it_fini(const struct lu_env *env, struct dt_it *di)
{
struct osp_it *it = (struct osp_it *)di;
struct folio **folios = it->ooi_folios;
int npages = it->ooi_total_npages;
int i;
if (folios != NULL) {
i = npages;
while (--i >= 0) {
if (folios[i]) {
if (it->ooi_cur_kaddr) {
void *kaddr = it->ooi_cur_kaddr;
ll_kunmap_local(kaddr);
it->ooi_cur_kaddr = NULL;
}
folio_put(folios[i]);
}
}
OBD_FREE_PTR_ARRAY(folios, npages);
}
OBD_FREE_PTR(it);
}
/**
* osp_it_fetch() - Get more records for the iteration from peer.
* @env: pointer to the thread context
* @it: pointer to the iteration structure
*
* The new records will be filled in an array of folios. The OSP side
* allows 1MB bulk data to be transferred.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_it_fetch(const struct lu_env *env, struct osp_it *it)
{
struct lu_device *dev = it->ooi_obj->do_lu.lo_dev;
struct osp_device *osp = lu2osp_dev(dev);
struct folio **folios;
struct ptlrpc_request *req = NULL;
struct ptlrpc_bulk_desc *desc;
struct idx_info *ii;
int npages;
int rc;
int i;
ENTRY;
/* 1MB bulk */
npages = min_t(unsigned int, OFD_MAX_BRW_SIZE, 1 << 20);
npages /= PAGE_SIZE;
OBD_ALLOC_PTR_ARRAY(folios, npages);
if (folios == NULL)
RETURN(-ENOMEM);
it->ooi_folios = folios;
it->ooi_total_npages = npages;
for (i = 0; i < npages; i++) {
folios[i] = folio_alloc(GFP_KERNEL, 0);
if (IS_ERR_OR_NULL(folios[i])) {
folios[i] = NULL;
RETURN(-ENOMEM);
}
}
req = ptlrpc_request_alloc(osp->opd_obd->u.cli.cl_import,
&RQF_OBD_IDX_READ);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, OBD_IDX_READ);
if (rc != 0) {
ptlrpc_request_free(req);
RETURN(rc);
}
osp_set_req_replay(osp, req);
req->rq_request_portal = OUT_PORTAL;
ii = req_capsule_client_get(&req->rq_pill, &RMF_IDX_INFO);
memset(ii, 0, sizeof(*ii));
if (fid_is_last_id(lu_object_fid(&it->ooi_obj->do_lu))) {
/* LFSCK will iterate orphan object[FID_SEQ_LAYOUT_BTREE,
* ost_index, 0] with LAST_ID FID, so it needs to replace
* the FID with orphan FID here */
ii->ii_fid.f_seq = FID_SEQ_LAYOUT_RBTREE;
ii->ii_fid.f_oid = osp->opd_index;
ii->ii_fid.f_ver = 0;
ii->ii_flags = II_FL_NOHASH;
ii->ii_attrs = osp_dev2node(osp);
} else {
ii->ii_fid = *lu_object_fid(&it->ooi_obj->do_lu);
ii->ii_flags = II_FL_NOHASH | II_FL_NOKEY | II_FL_VARKEY |
II_FL_VARREC;
ii->ii_attrs = it->ooi_attr;
}
ii->ii_magic = IDX_INFO_MAGIC;
ii->ii_count = npages * LU_PAGE_COUNT;
ii->ii_hash_start = it->ooi_next;
ptlrpc_at_set_req_timeout(req);
desc = ptlrpc_prep_bulk_imp(req, npages, 1,
PTLRPC_BULK_PUT_SINK,
MDS_BULK_PORTAL,
&ptlrpc_bulk_kiov_pin_ops);
if (desc == NULL)
GOTO(out, rc = -ENOMEM);
for (i = 0; i < npages; i++)
desc->bd_frag_ops->add_kiov_frag(desc, folio_page(folios[i], 0),
0, PAGE_SIZE);
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc != 0)
GOTO(out, rc);
rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
req->rq_bulk->bd_nob_transferred);
if (rc < 0)
GOTO(out, rc);
rc = 0;
ii = req_capsule_server_get(&req->rq_pill, &RMF_IDX_INFO);
if (ii->ii_magic != IDX_INFO_MAGIC)
GOTO(out, rc = -EPROTO);
npages = (ii->ii_count + LU_PAGE_COUNT - 1) >>
(PAGE_SHIFT - LU_PAGE_SHIFT);
if (npages > it->ooi_total_npages) {
CERROR("%s: returned more folios than expected, %u > %u\n",
osp->opd_obd->obd_name, npages, it->ooi_total_npages);
GOTO(out, rc = -EINVAL);
}
it->ooi_rec_size = ii->ii_recsize;
it->ooi_valid_npages = npages;
if (req_capsule_rep_need_swab(&req->rq_pill))
it->ooi_swab = 1;
it->ooi_next = ii->ii_hash_end;
out:
ptlrpc_req_put(req);
return rc;
}
/**
* osp_it_next_page() - Move the iteration cursor to the next lu_page.
* @env: pointer to the thread context
* @di: pointer to the iteration structure
*
* One system page (PAGE_SIZE) may contain multiple lu_page (4KB),
* that depends on the LU_PAGE_COUNT. If it is not the last lu_page
* in current system page, then move the iteration cursor to the next
* lu_page in current system page. Otherwise, if there are more system
* folios in the cache, then move the iteration cursor to the next system
* page. If all the cached records (folios) have been iterated, then fetch
* more records via osp_it_fetch().
*
* Return:
* * %positive for end of the directory
* * %0 for success
* * %negative error number on failure
*/
int osp_it_next_page(const struct lu_env *env, struct dt_it *di)
{
struct osp_it *it = (struct osp_it *)di;
struct lu_idxpage *idxpage;
struct folio **folios;
int rc;
int i;
ENTRY;
process_idxpage:
idxpage = it->ooi_cur_idxpage;
if (idxpage != NULL) {
if (idxpage->lip_nr == 0)
goto finish_cur_idxpage;
if (it->ooi_pos_ent < idxpage->lip_nr) {
CDEBUG(D_INFO, "ooi_pos %d nr %d\n",
(int)it->ooi_pos_ent, (int)idxpage->lip_nr);
RETURN(0);
}
finish_cur_idxpage:
it->ooi_cur_idxpage = NULL;
it->ooi_pos_lu_page++;
process_page:
if (it->ooi_pos_lu_page < LU_PAGE_COUNT) {
it->ooi_cur_idxpage = (void *)it->ooi_cur_kaddr +
LU_PAGE_SIZE * it->ooi_pos_lu_page;
if (it->ooi_swab)
lustre_swab_lip_header(it->ooi_cur_idxpage);
if (it->ooi_cur_idxpage->lip_magic != LIP_MAGIC) {
struct osp_device *osp =
lu2osp_dev(it->ooi_obj->do_lu.lo_dev);
CERROR("%s: invalid magic (%x != %x) for page %d/%d while read layout orphan index\n",
osp->opd_obd->obd_name,
it->ooi_cur_idxpage->lip_magic,
LIP_MAGIC, it->ooi_pos_page,
it->ooi_pos_lu_page);
/* Skip this lu_page next time. */
it->ooi_pos_ent = idxpage->lip_nr - 1;
RETURN(-EINVAL);
}
it->ooi_pos_ent = -1;
goto process_idxpage;
}
ll_kunmap_local(it->ooi_cur_kaddr);
it->ooi_cur_kaddr = NULL;
it->ooi_pos_page++;
start:
folios = it->ooi_folios;
if (it->ooi_pos_page < it->ooi_valid_npages) {
it->ooi_cur_kaddr =
ll_kmap_local_folio(folios[it->ooi_pos_page],
0);
it->ooi_pos_lu_page = 0;
goto process_page;
}
for (i = 0; i < it->ooi_total_npages; i++) {
if (folios[i] != NULL)
folio_put(folios[i]);
}
OBD_FREE_PTR_ARRAY(folios, it->ooi_total_npages);
it->ooi_pos_page = 0;
it->ooi_total_npages = 0;
it->ooi_valid_npages = 0;
it->ooi_swab = 0;
it->ooi_ent = NULL;
it->ooi_cur_kaddr = NULL;
it->ooi_cur_idxpage = NULL;
it->ooi_folios = NULL;
}
if (it->ooi_next == II_END_OFF)
RETURN(1);
rc = osp_it_fetch(env, it);
if (rc == 0)
goto start;
RETURN(rc);
}
/**
* osp_orphan_it_next() - Move the iteration cursor to the next record.
* @env: pointer to the thread context
* @di: pointer to the iteration structure
*
* If there are more records in the lu_page, then move the iteration
* cursor to the next record directly. Otherwise, move the iteration
* cursor to the record in the next lu_page via osp_it_next_page()
*
* Return:
* * %positive for end of the directory
* * %0 for success
* * %negative error number on failure
*/
static int osp_orphan_it_next(const struct lu_env *env, struct dt_it *di)
{
struct osp_it *it = (struct osp_it *)di;
struct lu_idxpage *idxpage;
int rc;
ENTRY;
again:
idxpage = it->ooi_cur_idxpage;
if (idxpage != NULL) {
if (idxpage->lip_nr == 0)
RETURN(1);
it->ooi_pos_ent++;
if (it->ooi_pos_ent < idxpage->lip_nr) {
if (it->ooi_rec_size ==
sizeof(struct lu_orphan_rec_v3)) {
it->ooi_ent =
(struct lu_orphan_ent_v3 *)idxpage->lip_entries+
it->ooi_pos_ent;
if (it->ooi_swab)
lustre_swab_orphan_ent_v3(it->ooi_ent);
} else if (it->ooi_rec_size ==
sizeof(struct lu_orphan_rec_v2)) {
it->ooi_ent =
(struct lu_orphan_ent_v2 *)idxpage->lip_entries+
it->ooi_pos_ent;
if (it->ooi_swab)
lustre_swab_orphan_ent_v2(it->ooi_ent);
} else {
it->ooi_ent =
(struct lu_orphan_ent *)idxpage->lip_entries +
it->ooi_pos_ent;
if (it->ooi_swab)
lustre_swab_orphan_ent(it->ooi_ent);
}
RETURN(0);
}
}
rc = osp_it_next_page(env, di);
if (rc == 0)
goto again;
RETURN(rc);
}
int osp_it_get(const struct lu_env *env, struct dt_it *di,
const struct dt_key *key)
{
return 1;
}
void osp_it_put(const struct lu_env *env, struct dt_it *di)
{
}
static struct dt_key *osp_orphan_it_key(const struct lu_env *env,
const struct dt_it *di)
{
struct osp_it *it = (struct osp_it *)di;
struct lu_orphan_ent *ent = (struct lu_orphan_ent *)it->ooi_ent;
if (likely(ent != NULL))
return (struct dt_key *)(&ent->loe_key);
return NULL;
}
static int osp_orphan_it_key_size(const struct lu_env *env,
const struct dt_it *di)
{
return sizeof(struct lu_fid);
}
static int osp_orphan_it_rec(const struct lu_env *env, const struct dt_it *di,
struct dt_rec *rec, __u32 attr)
{
struct osp_it *it = (struct osp_it *)di;
if (likely(it->ooi_ent)) {
if (it->ooi_rec_size == sizeof(struct lu_orphan_rec_v3)) {
struct lu_orphan_ent_v3 *ent =
(struct lu_orphan_ent_v3 *)it->ooi_ent;
*(struct lu_orphan_rec_v3 *)rec = ent->loe_rec;
} else if (it->ooi_rec_size ==
sizeof(struct lu_orphan_rec_v2)) {
struct lu_orphan_ent_v2 *ent =
(struct lu_orphan_ent_v2 *)it->ooi_ent;
*(struct lu_orphan_rec_v2 *)rec = ent->loe_rec;
} else {
struct lu_orphan_ent *ent =
(struct lu_orphan_ent *)it->ooi_ent;
*(struct lu_orphan_rec *)rec = ent->loe_rec;
}
return 0;
}
return -EINVAL;
}
__u64 osp_it_store(const struct lu_env *env, const struct dt_it *di)
{
struct osp_it *it = (struct osp_it *)di;
return it->ooi_next;
}
/**
* osp_orphan_it_load() - Locate the iteration cursor to the specified
* position (cookie).
* @env: pointer to the thread context
* @di: pointer to the iteration structure
* @hash: the specified position
*
* Return:
* * %positive number for locating to the exactly position or the next
* * %0 for arriving at the end of the iteration
* * %negative error number on failure
*/
static int osp_orphan_it_load(const struct lu_env *env, const struct dt_it *di,
__u64 hash)
{
struct osp_it *it = (struct osp_it *)di;
int rc;
it->ooi_next = hash;
rc = osp_orphan_it_next(env, (struct dt_it *)di);
if (rc == 1)
return 0;
if (rc == 0)
return 1;
return rc;
}
static const struct dt_index_operations osp_orphan_index_ops = {
.dio_it = {
.init = osp_it_init,
.fini = osp_it_fini,
.next = osp_orphan_it_next,
.get = osp_it_get,
.put = osp_it_put,
.key = osp_orphan_it_key,
.key_size = osp_orphan_it_key_size,
.rec = osp_orphan_it_rec,
.store = osp_it_store,
.load = osp_orphan_it_load,
}
};
/**
* osp_index_try() - Implement OSP layer do_index_try() interface.
* @env: pointer to the thread context
* @dt: pointer to the OSP layer dt_object
* @feat: unused
*
* Implement OSP layer dt_object_operations::do_index_try() interface.
* Negotiate the index type.
*
* If the target index is an IDIF object, then use osp_orphan_index_ops.
* Otherwise, assign osp_md_index_ops to the dt_object::do_index_ops.
* (see lustre/include/lustre_fid.h for IDIF.)
*
* Returns 0 for success
*/
static int osp_index_try(const struct lu_env *env,
struct dt_object *dt,
const struct dt_index_features *feat)
{
const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
if (fid_is_last_id(fid) && fid_is_idif(fid))
dt->do_index_ops = &osp_orphan_index_ops;
else
dt->do_index_ops = &osp_md_index_ops;
return 0;
}
static const struct dt_object_operations osp_obj_ops = {
.do_declare_attr_get = osp_declare_attr_get,
.do_attr_get = osp_attr_get,
.do_declare_attr_set = osp_declare_attr_set,
.do_attr_set = osp_attr_set,
.do_declare_xattr_get = osp_declare_xattr_get,
.do_xattr_get = osp_xattr_get,
.do_declare_xattr_set = osp_declare_xattr_set,
.do_xattr_set = osp_xattr_set,
.do_declare_create = osp_declare_create,
.do_create = osp_create,
.do_declare_destroy = osp_declare_destroy,
.do_destroy = osp_destroy,
.do_index_try = osp_index_try,
};
/**
* osp_object_init() - Implement OSP layer loo_object_init() interface.
* @env: pointer to the thread context
* @o: pointer to the OSP layer lu_object
* @conf: unused
*
* Implement OSP layer lu_object_operations::loo_object_init() interface.
* Initialize the object.
*
* If it is a remote MDT object, then call do_attr_get() to fetch
* the attribute from the peer.
*
* Return:
* * %0 for success
* * %negative error number on failure
*/
static int osp_object_init(const struct lu_env *env, struct lu_object *o,
const struct lu_object_conf *conf)
{
struct osp_object *po = lu2osp_obj(o);
int rc = 0;
ENTRY;
o->lo_header->loh_attr |= LOHA_REMOTE;
if (is_ost_obj(o)) {
po->opo_obj.do_ops = &osp_obj_ops;
} else {
struct lu_attr *la = &osp_env_info(env)->osi_attr;
po->opo_obj.do_ops = &osp_md_obj_ops;
po->opo_obj.do_body_ops = &osp_md_body_ops;
if (conf != NULL && conf->loc_flags & LOC_F_NEW) {
po->opo_non_exist = 1;
} else {
rc = po->opo_obj.do_ops->do_attr_get(env, lu2dt_obj(o),
la);
if (rc == 0)
o->lo_header->loh_attr |=
LOHA_EXISTS | (la->la_mode & S_IFMT);
if (rc == -ENOENT) {
po->opo_non_exist = 1;
rc = 0;
}
}
}
RETURN(rc);
}
static void osp_object_free_rcu(struct rcu_head *head)
{
struct osp_object *obj = container_of(head, struct osp_object,
opo_header.loh_rcu);
kmem_cache_free(osp_object_kmem, obj);
}
/**
* osp_object_free() - Implement OSP layer loo_object_free() interface.
* @env: pointer to the thread context
* @o: pointer to the OSP layer lu_object
*
* Implement OSP layer lu_object_operations::loo_object_free() interface.
* Finalize the object.
*
* If the OSP object has attributes cache, then destroy the cache.
* Free the object finally.
*/
static void osp_object_free(const struct lu_env *env, struct lu_object *o)
{
struct osp_object *obj = lu2osp_obj(o);
struct lu_object_header *h = o->lo_header;
struct osp_xattr_entry *oxe;
struct osp_xattr_entry *tmp;
int count;
dt_object_fini(&obj->opo_obj);
if (h)
lu_object_header_fini(h);
list_for_each_entry_safe(oxe, tmp, &obj->opo_xattr_list, oxe_list) {
list_del_init(&oxe->oxe_list);
count = atomic_read(&oxe->oxe_ref);
LASSERTF(count == 1,
"Still has %d users on the xattr entry %.*s\n",
count-1, (int)oxe->oxe_namelen, oxe->oxe_name);
osp_oac_xattr_free(oxe);
}
OBD_FREE_PRE(obj, sizeof(*obj), "slab-freed");
call_rcu(&obj->opo_header.loh_rcu, osp_object_free_rcu);
}
/**
* osp_object_release() - Implement OSP layer loo_object_release() interface.
* @env: pointer to the thread context
* @o: pointer to the OSP layer lu_object
*
* Implement OSP layer lu_object_operations::loo_object_release() interface.
* Cleanup (not free) the object.
*
* If it is a reserved object but failed to be created, or it is an OST
* object, then mark the object as non-cached.
*/
static void osp_object_release(const struct lu_env *env, struct lu_object *o)
{
struct osp_object *po = lu2osp_obj(o);
struct osp_device *d = lu2osp_dev(o->lo_dev);
ENTRY;
/*
* release reservation if object was declared but not created
* this may require lu_object_put() in LOD
*/
if (unlikely(po->opo_reserved)) {
LASSERT(d->opd_pre != NULL);
LASSERT(d->opd_pre_reserved > 0);
spin_lock(&d->opd_pre_lock);
d->opd_pre_reserved--;
spin_unlock(&d->opd_pre_lock);
/*
* Check that osp_precreate_cleanup_orphans is not blocked
* due to opd_pre_reserved > 0.
*/
if (unlikely(d->opd_pre_reserved == 0 &&
(d->opd_pre_recovering || d->opd_pre_status)))
wake_up(&d->opd_pre_waitq);
/* not needed in cache any more */
set_bit(LU_OBJECT_HEARD_BANSHEE, &o->lo_header->loh_flags);
}
if (is_ost_obj(o))
/* XXX: Currently, NOT cache OST-object on MDT because:
* 1. it is not often accessed on MDT.
* 2. avoid up layer (such as LFSCK) to load too many
* once-used OST-objects. */
set_bit(LU_OBJECT_HEARD_BANSHEE, &o->lo_header->loh_flags);
EXIT;
}
static int osp_object_print(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *l)
{
const struct osp_object *o = lu2osp_obj((struct lu_object *)l);
return (*p)(env, cookie, LUSTRE_OSP_NAME"-object@%p", o);
}
static int osp_object_invariant(const struct lu_object *o)
{
LBUG();
return -EINVAL;
}
const struct lu_object_operations osp_lu_obj_ops = {
.loo_object_init = osp_object_init,
.loo_object_free = osp_object_free,
.loo_object_release = osp_object_release,
.loo_object_print = osp_object_print,
.loo_object_invariant = osp_object_invariant
};
