spinlock_t lut_client_bitmap_lock;
/** Bitmap of known clients */
unsigned long *lut_client_bitmap;
+ /* Number of clients supporting multiple modify RPCs
+ * recorded in the bitmap */
+ atomic_t lut_num_clients;
+ /* Client generation to identify client slot reuse */
+ atomic_t lut_client_generation;
+ /** reply_data file */
+ struct dt_object *lut_reply_data;
+ /** Bitmap of used slots in the reply data file */
+ unsigned long **lut_reply_bitmap;
+};
+
+/* number of slots in reply bitmap */
+#define LUT_REPLY_SLOTS_PER_CHUNK (1<<20)
+#define LUT_REPLY_SLOTS_MAX_CHUNKS 16
+
+/**
+ * Target reply data
+ */
+struct tg_reply_data {
+ /** chain of reply data anchored in tg_export_data */
+ struct list_head trd_list;
+ /** copy of on-disk reply data */
+ struct lsd_reply_data trd_reply;
+ /** versions for Version Based Recovery */
+ __u64 trd_pre_versions[4];
+ /** slot index in reply_data file */
+ int trd_index;
+ /** tag the client used */
+ __u16 trd_tag;
};
extern struct lu_context_key tgt_session_key;
return !!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
}
+static inline bool tgt_is_multimodrpcs_client(struct obd_export *exp)
+{
+ return exp_connect_flags(exp) & OBD_CONNECT_MULTIMODRPCS;
+}
+
+
/* target/tgt_handler.c */
int tgt_request_handle(struct ptlrpc_request *req);
char *tgt_name(struct lu_target *tgt);
void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
struct dt_device *,
struct lfsck_request *));
+bool req_can_reconstruct(struct ptlrpc_request *req, struct tg_reply_data *trd);
extern struct tgt_handler tgt_lfsck_handlers[];
extern struct tgt_handler tgt_obd_handlers[];
int sync);
int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg,
loff_t off);
+int tgt_reply_data_init(const struct lu_env *env, struct lu_target *tgt);
+bool tgt_lookup_reply(struct ptlrpc_request *req, struct tg_reply_data *trd);
/* target/update_trans.c */
int distribute_txn_init(const struct lu_env *env,
OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK | \
OBD_CONNECT_OPEN_BY_FID | \
OBD_CONNECT_DIR_STRIPE | \
- OBD_CONNECT_BULK_MBITS)
+ OBD_CONNECT_BULK_MBITS | \
+ OBD_CONNECT_MULTIMODRPCS)
#define OST_CONNECT_SUPPORTED (OBD_CONNECT_SRVLOCK | OBD_CONNECT_GRANT | \
OBD_CONNECT_REQPORTAL | OBD_CONNECT_VERSION | \
/** Persistent mount data are stored on the disk in this file. */
#define MOUNT_DATA_FILE MOUNT_CONFIGS_DIR"/"CONFIGS_FILE
#define LAST_RCVD "last_rcvd"
+#define REPLY_DATA "reply_data"
#define LOV_OBJID "lov_objid"
#define LOV_OBJSEQ "lov_objseq"
#define HEALTH_CHECK "health_check"
#define OBD_INCOMPAT_LMM_VER 0x00000100
/** multiple OI files for MDT */
#define OBD_INCOMPAT_MULTI_OI 0x00000200
+/** multiple RPCs in flight */
+#define OBD_INCOMPAT_MULTI_RPCS 0x00000400
/* Data stored per server at the head of the last_rcvd file. In le32 order.
This should be common to filter_internal.h, lustre_mds.h */
/* VBR: last versions */
__u64 lcd_pre_versions[4];
__u32 lcd_last_epoch;
- /** orphans handling for delayed export rely on that */
- __u32 lcd_first_epoch;
- __u8 lcd_padding[LR_CLIENT_SIZE - 128];
+ /* generation counter of client slot in last_rcvd */
+ __u32 lcd_generation;
+ __u8 lcd_padding[LR_CLIENT_SIZE - 128];
};
+
+/* Data stored in each slot of the reply_data file.
+ *
+ * The lrd_client_gen field is assigned with lcd_generation value
+ * to allow identify which client the reply data belongs to.
+ */
+struct lsd_reply_data {
+ __u64 lrd_transno; /* transaction number */
+ __u64 lrd_xid; /* transmission id */
+ __u64 lrd_data; /* per-operation data */
+ __u32 lrd_result; /* request result */
+ __u32 lrd_client_gen; /* client generation */
+};
+
+/* Header of the reply_data file */
+#define LRH_MAGIC 0xbdabda01
+struct lsd_reply_header {
+ __u32 lrh_magic;
+ __u32 lrh_header_size;
+ __u32 lrh_reply_size;
+ __u8 lrh_pad[sizeof(struct lsd_reply_data) - 12];
+};
+
+
/* bug20354: the lcd_uuid for export of clients may be wrong */
static inline void check_lcd(char *obd_name, int index,
struct lsd_client_data *lcd)
lcd->lcd_pre_versions[2] = le64_to_cpu(buf->lcd_pre_versions[2]);
lcd->lcd_pre_versions[3] = le64_to_cpu(buf->lcd_pre_versions[3]);
lcd->lcd_last_epoch = le32_to_cpu(buf->lcd_last_epoch);
- lcd->lcd_first_epoch = le32_to_cpu(buf->lcd_first_epoch);
+ lcd->lcd_generation = le32_to_cpu(buf->lcd_generation);
}
static inline void lcd_cpu_to_le(struct lsd_client_data *lcd,
buf->lcd_pre_versions[2] = cpu_to_le64(lcd->lcd_pre_versions[2]);
buf->lcd_pre_versions[3] = cpu_to_le64(lcd->lcd_pre_versions[3]);
buf->lcd_last_epoch = cpu_to_le32(lcd->lcd_last_epoch);
- buf->lcd_first_epoch = cpu_to_le32(lcd->lcd_first_epoch);
+ buf->lcd_generation = cpu_to_le32(lcd->lcd_generation);
}
static inline __u64 lcd_last_transno(struct lsd_client_data *lcd)
* Target-specific export data
*/
struct tg_export_data {
- /** Protects led_lcd below */
+ /** Protects ted_lcd, ted_reply_* and
+ * ted_release_* fields below */
struct mutex ted_lcd_lock;
/** Per-client data for each export */
struct lsd_client_data *ted_lcd;
/** nodemap this export is a member of */
struct lu_nodemap *ted_nodemap;
struct hlist_node ted_nodemap_member;
+
+ /* Every reply data fields below are
+ * protected by ted_lcd_lock */
+ /** List of reply data */
+ struct list_head ted_reply_list;
+ int ted_reply_cnt;
+ /** Reply data with highest transno is retained */
+ struct tg_reply_data *ted_reply_last;
+ /* Statistics */
+ int ted_reply_max; /* high water mark */
+ int ted_release_xid;
+ int ted_release_tag;
};
/**
struct list_head exp_obd_chain;
struct hlist_node exp_uuid_hash; /** uuid-export hash*/
struct hlist_node exp_nid_hash; /** nid-export hash */
+ struct hlist_node exp_gen_hash; /** last_rcvd clt gen hash */
/**
* All exports eligible for ping evictor are linked into a list
* through this field in "most time since last request on this export"
LFSCK_BOOKMARK_OID = 17UL,
OTABLE_IT_OID = 18UL,
OSD_LPF_OID = 19UL,
- /* These two definitions are obsolete
- * OFD_GROUP0_LAST_OID = 20UL,
- * OFD_GROUP4K_LAST_OID = 20UL+4096,
- */
+ REPLY_DATA_OID = 21UL,
OFD_LAST_GROUP_OID = 4117UL,
LLOG_CATALOGS_OID = 4118UL,
MGS_CONFIGS_OID = 4119UL,
struct cfs_hash *obd_nid_hash;
/* nid stats body */
struct cfs_hash *obd_nid_stats_hash;
+ /* client_generation-export hash body */
+ struct cfs_hash *obd_gen_hash;
struct list_head obd_nid_stats;
atomic_t obd_refcount;
struct list_head obd_exports;
#define HASH_NID_STATS_BKT_BITS 5
#define HASH_NID_STATS_CUR_BITS 7
#define HASH_NID_STATS_MAX_BITS 12
+#define HASH_GEN_BKT_BITS 5
+#define HASH_GEN_CUR_BITS 7
+#define HASH_GEN_MAX_BITS 12
#define HASH_LQE_BKT_BITS 5
#define HASH_LQE_CUR_BITS 7
#define HASH_LQE_MAX_BITS 12
#include <lustre_lfsck.h>
#include <lustre_nodemap.h>
+static unsigned int max_mod_rpcs_per_client = 8;
+CFS_MODULE_PARM(max_mod_rpcs_per_client, "i", uint, 0644,
+ "maximum number of modify RPCs in flight allowed per client");
+
mdl_mode_t mdt_mdl_lock_modes[] = {
[LCK_MINMODE] = MDL_MINMODE,
[LCK_EX] = MDL_EX,
if (rc != 0)
GOTO(out_ucred, rc = err_serious(rc));
- if (mdt_check_resent(info, mdt_reconstruct, lhc)) {
+ rc = mdt_check_resent(info, mdt_reconstruct, lhc);
+ if (rc < 0) {
+ GOTO(out_ucred, rc);
+ } else if (rc == 1) {
DEBUG_REQ(D_INODE, mdt_info_req(info), "resent opt.");
rc = lustre_msg_get_status(mdt_info_req(info)->rq_repmsg);
GOTO(out_ucred, rc);
return;
}
- /*
- * If the xid matches, then we know this is a resent request, and allow
- * it. (It's probably an OPEN, for which we don't send a lock.
- */
- if (req_xid_is_last(req))
- return;
+ /*
+ * If the xid matches, then we know this is a resent request, and allow
+ * it. (It's probably an OPEN, for which we don't send a lock.
+ */
+ if (req_can_reconstruct(req, NULL))
+ return;
/*
* This remote handle isn't enqueued, so we never received or processed
data->ocd_max_easize = mdt->mdt_max_ea_size;
+ /* NB: Disregard the rule against updating
+ * exp_connect_data.ocd_connect_flags in this case, since
+ * tgt_client_new() needs to know if this is client supports
+ * multiple modify RPCs, and it is safe to expose this flag before
+ * connection processing completes. */
+ if (data->ocd_connect_flags & OBD_CONNECT_MULTIMODRPCS) {
+ data->ocd_maxmodrpcs = max_mod_rpcs_per_client;
+ spin_lock(&exp->exp_lock);
+ *exp_connect_flags_ptr(exp) |= OBD_CONNECT_MULTIMODRPCS;
+ spin_unlock(&exp->exp_lock);
+ }
+
return 0;
}
#include <lustre_quota.h>
#include <lustre_linkea.h>
-/* check if request's xid is equal to last one or not*/
-static inline int req_xid_is_last(struct ptlrpc_request *req)
-{
- struct lsd_client_data *lcd = req->rq_export->exp_target_data.ted_lcd;
- return (req->rq_xid == lcd->lcd_last_xid ||
- req->rq_xid == lcd->lcd_last_close_xid);
-}
-
struct mdt_object;
/* file data for open files on MDS */
/* should be enough to fit lustre_mdt_attrs */
char mti_xattr_buf[128];
struct ldlm_enqueue_info mti_einfo;
+ struct tg_reply_data *mti_reply_data;
};
extern struct lu_context_key mdt_thread_key;
int mdt_pack_remote_perm(struct mdt_thread_info *, struct mdt_object *, void *);
/* mdt/mdt_recovery.c */
-void mdt_req_from_lcd(struct ptlrpc_request *req, struct lsd_client_data *lcd);
+__u64 mdt_req_from_lrd(struct ptlrpc_request *req, struct tg_reply_data *trd);
/* mdt/mdt_hsm.c */
int mdt_hsm_state_get(struct tgt_session_info *tsi);
mdt_reconstruct_t reconstruct,
struct mdt_lock_handle *lhc)
{
- struct ptlrpc_request *req = mdt_info_req(info);
- ENTRY;
-
- if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) {
- if (req_xid_is_last(req)) {
- reconstruct(info, lhc);
- RETURN(1);
- }
- DEBUG_REQ(D_HA, req, "no reply for RESENT req (have "LPD64")",
- req->rq_export->exp_target_data.ted_lcd->lcd_last_xid);
- }
- RETURN(0);
+ struct ptlrpc_request *req = mdt_info_req(info);
+ int rc = 0;
+ ENTRY;
+
+ if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) {
+ OBD_ALLOC_PTR(info->mti_reply_data);
+ if (info->mti_reply_data == NULL)
+ RETURN(-ENOMEM);
+
+ if (req_can_reconstruct(req, info->mti_reply_data)) {
+ reconstruct(info, lhc);
+ rc = 1;
+ } else {
+ DEBUG_REQ(D_HA, req,
+ "no reply data found for RESENT req");
+ rc = 0;
+ }
+ OBD_FREE_PTR(info->mti_reply_data);
+ info->mti_reply_data = NULL;
+ }
+ RETURN(rc);
}
struct lu_ucred *mdt_ucred(const struct mdt_thread_info *info);
if (lustre_msg_get_transno(req->rq_repmsg) != 0)
RETURN_EXIT;
+ if (tgt_is_multimodrpcs_client(req->rq_export)) {
+ struct thandle *th;
+
+ /* generate an empty transaction to get a transno
+ * and reply data */
+ th = dt_trans_create(info->mti_env, mdt->mdt_bottom);
+ if (!IS_ERR(th)) {
+ rc = dt_trans_start(info->mti_env, mdt->mdt_bottom, th);
+ dt_trans_stop(info->mti_env, mdt->mdt_bottom, th);
+ }
+ RETURN_EXIT;
+ }
+
spin_lock(&mdt->mdt_lut.lut_translock);
if (rc != 0) {
if (info->mti_transno != 0) {
struct mdt_device *mdt = info->mti_mdt;
struct req_capsule *pill = info->mti_pill;
struct ptlrpc_request *req = mdt_info_req(info);
- struct tg_export_data *ted = &req->rq_export->exp_target_data;
- struct lsd_client_data *lcd = ted->ted_lcd;
struct md_attr *ma = &info->mti_attr;
struct mdt_reint_record *rr = &info->mti_rr;
__u64 flags = info->mti_spec.sp_cr_flags;
struct mdt_object *child;
struct mdt_body *repbody;
int rc;
- ENTRY;
+ __u64 opdata;
+ ENTRY;
LASSERT(pill->rc_fmt == &RQF_LDLM_INTENT_OPEN);
ldlm_rep = req_capsule_server_get(pill, &RMF_DLM_REP);
repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
ma->ma_need = MA_INODE | MA_HSM;
- ma->ma_valid = 0;
+ ma->ma_valid = 0;
- mdt_req_from_lcd(req, lcd);
- mdt_set_disposition(info, ldlm_rep, lcd->lcd_last_data);
+ opdata = mdt_req_from_lrd(req, info->mti_reply_data);
+ mdt_set_disposition(info, ldlm_rep, opdata);
CDEBUG(D_INODE, "This is reconstruct open: disp="LPX64", result=%d\n",
ldlm_rep->lock_policy_res1, req->rq_status);
spin_unlock(&exp->exp_lock);
}
-/**
- * VBR: restore versions
- */
-static void mdt_vbr_reconstruct(struct ptlrpc_request *req,
- struct lsd_client_data *lcd)
+__u64 mdt_req_from_lrd(struct ptlrpc_request *req,
+ struct tg_reply_data *trd)
{
- __u64 pre_versions[4] = {0};
- pre_versions[0] = lcd->lcd_pre_versions[0];
- pre_versions[1] = lcd->lcd_pre_versions[1];
- pre_versions[2] = lcd->lcd_pre_versions[2];
- pre_versions[3] = lcd->lcd_pre_versions[3];
- lustre_msg_set_versions(req->rq_repmsg, pre_versions);
-}
+ struct lsd_reply_data *lrd;
-void mdt_req_from_lcd(struct ptlrpc_request *req, struct lsd_client_data *lcd)
-{
- DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
- lcd->lcd_last_transno, lcd->lcd_last_result);
-
- if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
- req->rq_transno = lcd->lcd_last_close_transno;
- req->rq_status = lcd->lcd_last_close_result;
- } else {
- req->rq_transno = lcd->lcd_last_transno;
- req->rq_status = lcd->lcd_last_result;
- mdt_vbr_reconstruct(req, lcd);
- }
- if (req->rq_status != 0)
- req->rq_transno = 0;
- lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
- lustre_msg_set_status(req->rq_repmsg, req->rq_status);
- DEBUG_REQ(D_RPCTRACE, req, "restoring transno "LPD64"/status %d",
- req->rq_transno, req->rq_status);
-
- mdt_steal_ack_locks(req);
+ LASSERT(trd != NULL);
+ lrd = &trd->trd_reply;
+
+ DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
+ lrd->lrd_transno, lrd->lrd_result);
+
+ req->rq_transno = lrd->lrd_transno;
+ req->rq_status = lrd->lrd_result;
+
+ lustre_msg_set_versions(req->rq_repmsg, trd->trd_pre_versions);
+
+ if (req->rq_status != 0)
+ req->rq_transno = 0;
+ lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
+ lustre_msg_set_status(req->rq_repmsg, req->rq_status);
+
+ DEBUG_REQ(D_RPCTRACE, req, "restoring transno "LPD64"/status %d",
+ req->rq_transno, req->rq_status);
+
+ mdt_steal_ack_locks(req);
+
+ return lrd->lrd_data;
}
+
void mdt_reconstruct_generic(struct mdt_thread_info *mti,
- struct mdt_lock_handle *lhc)
+ struct mdt_lock_handle *lhc)
{
- struct ptlrpc_request *req = mdt_info_req(mti);
- struct tg_export_data *ted = &req->rq_export->exp_target_data;
+ struct ptlrpc_request *req = mdt_info_req(mti);
- return mdt_req_from_lcd(req, ted->ted_lcd);
+ mdt_req_from_lrd(req, mti->mti_reply_data);
+ return;
}
/**
static void mdt_reconstruct_create(struct mdt_thread_info *mti,
struct mdt_lock_handle *lhc)
{
- struct ptlrpc_request *req = mdt_info_req(mti);
- struct obd_export *exp = req->rq_export;
- struct tg_export_data *ted = &exp->exp_target_data;
- struct mdt_device *mdt = mti->mti_mdt;
- struct mdt_object *child;
- struct mdt_body *body;
- int rc;
+ struct ptlrpc_request *req = mdt_info_req(mti);
+ struct obd_export *exp = req->rq_export;
+ struct mdt_device *mdt = mti->mti_mdt;
+ struct mdt_object *child;
+ struct mdt_body *body;
+ int rc;
- mdt_req_from_lcd(req, ted->ted_lcd);
- if (req->rq_status)
- return;
+ mdt_req_from_lrd(req, mti->mti_reply_data);
+ if (req->rq_status)
+ return;
/* if no error, so child was created with requested fid */
child = mdt_object_find(mti->mti_env, mdt, mti->mti_rr.rr_fid2);
{
struct ptlrpc_request *req = mdt_info_req(mti);
struct obd_export *exp = req->rq_export;
- struct mdt_export_data *med = &exp->exp_mdt_data;
struct mdt_device *mdt = mti->mti_mdt;
struct mdt_object *obj;
struct mdt_body *body;
int rc;
- mdt_req_from_lcd(req, med->med_ted.ted_lcd);
- if (req->rq_status)
- return;
+ mdt_req_from_lrd(req, mti->mti_reply_data);
+ if (req->rq_status)
+ return;
body = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY);
obj = mdt_object_find(mti->mti_env, mdt, mti->mti_rr.rr_fid1);
spin_lock_init(&export->exp_rpc_lock);
INIT_HLIST_NODE(&export->exp_uuid_hash);
INIT_HLIST_NODE(&export->exp_nid_hash);
+ INIT_HLIST_NODE(&export->exp_gen_hash);
spin_lock_init(&export->exp_bl_list_lock);
INIT_LIST_HEAD(&export->exp_bl_list);
}
LPROC_SEQ_FOPS_RO(lprocfs_exp_hash);
+int lprocfs_exp_print_replydata_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ struct hlist_node *hnode, void *cb_data)
+
+{
+ struct obd_export *exp = cfs_hash_object(hs, hnode);
+ struct seq_file *m = cb_data;
+ struct tg_export_data *ted = &exp->exp_target_data;
+
+ seq_printf(m, "reply_cnt: %d\n"
+ "reply_max: %d\n"
+ "reply_released_by_xid: %d\n"
+ "reply_released_by_tag: %d\n\n",
+ ted->ted_reply_cnt,
+ ted->ted_reply_max,
+ ted->ted_release_xid,
+ ted->ted_release_tag);
+ return 0;
+}
+
+int lprocfs_exp_replydata_seq_show(struct seq_file *m, void *data)
+{
+ struct nid_stat *stats = m->private;
+ struct obd_device *obd = stats->nid_obd;
+
+ cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
+ lprocfs_exp_print_replydata_seq, m);
+ return 0;
+}
+LPROC_SEQ_FOPS_RO(lprocfs_exp_replydata);
+
int lprocfs_nid_stats_clear_seq_show(struct seq_file *m, void *data)
{
return seq_printf(m, "%s\n", "Write into this file to clear all nid "
GOTO(destroy_new_ns, rc);
}
+ entry = lprocfs_add_simple(new_stat->nid_proc, "reply_data", new_stat,
+ &lprocfs_exp_replydata_fops);
+ if (IS_ERR(entry)) {
+ rc = PTR_ERR(entry);
+ CWARN("%s: Error adding the reply_data file: rc = %d\n",
+ obd->obd_name, rc);
+ GOTO(destroy_new_ns, rc);
+ }
+
spin_lock(&exp->exp_lock);
exp->exp_nid_stats = new_stat;
spin_unlock(&exp->exp_lock);
static struct cfs_hash_ops uuid_hash_ops;
static struct cfs_hash_ops nid_hash_ops;
static struct cfs_hash_ops nid_stat_hash_ops;
+static struct cfs_hash_ops gen_hash_ops;
/*********** string parsing utils *********/
obd->obd_uuid_hash = NULL;
obd->obd_nid_hash = NULL;
obd->obd_nid_stats_hash = NULL;
+ obd->obd_gen_hash = NULL;
spin_unlock(&obd->obd_dev_lock);
/* create an uuid-export lustre hash */
if (!obd->obd_nid_stats_hash)
GOTO(err_hash, err = -ENOMEM);
+ /* create a client_generation-export lustre hash */
+ obd->obd_gen_hash = cfs_hash_create("UUID_HASH",
+ HASH_GEN_CUR_BITS,
+ HASH_GEN_MAX_BITS,
+ HASH_GEN_BKT_BITS, 0,
+ CFS_HASH_MIN_THETA,
+ CFS_HASH_MAX_THETA,
+ &gen_hash_ops, CFS_HASH_DEFAULT);
+ if (!obd->obd_gen_hash)
+ GOTO(err_hash, err = -ENOMEM);
+
exp = class_new_export(obd, &obd->obd_uuid);
if (IS_ERR(exp))
GOTO(err_hash, err = PTR_ERR(exp));
cfs_hash_putref(obd->obd_nid_stats_hash);
obd->obd_nid_stats_hash = NULL;
}
+ if (obd->obd_gen_hash) {
+ cfs_hash_putref(obd->obd_gen_hash);
+ obd->obd_gen_hash = NULL;
+ }
obd->obd_starting = 0;
CERROR("setup %s failed (%d)\n", obd->obd_name, err);
return err;
obd->obd_nid_stats_hash = NULL;
}
+ /* destroy a client_generation-export hash body */
+ if (obd->obd_gen_hash) {
+ cfs_hash_putref(obd->obd_gen_hash);
+ obd->obd_gen_hash = NULL;
+ }
+
class_decref(obd, "setup", obd);
obd->obd_set_up = 0;
.hs_get = nidstats_get,
.hs_put_locked = nidstats_put_locked,
};
+
+
+/*
+ * client_generation<->export hash operations
+ */
+
+static unsigned
+gen_hash(struct cfs_hash *hs, const void *key, unsigned mask)
+{
+ return cfs_hash_djb2_hash(key, sizeof(__u32), mask);
+}
+
+static void *
+gen_key(struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
+
+ RETURN(&exp->exp_target_data.ted_lcd->lcd_generation);
+}
+
+/*
+ * NOTE: It is impossible to find an export that is in failed
+ * state with this function
+ */
+static int
+gen_kepcmp(const void *key, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ LASSERT(key);
+ exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
+
+ RETURN(exp->exp_target_data.ted_lcd->lcd_generation == *(__u32 *)key &&
+ !exp->exp_failed);
+}
+
+static void *
+gen_export_object(struct hlist_node *hnode)
+{
+ return hlist_entry(hnode, struct obd_export, exp_gen_hash);
+}
+
+static void
+gen_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
+ class_export_get(exp);
+}
+
+static void
+gen_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
+ class_export_put(exp);
+}
+
+static struct cfs_hash_ops gen_hash_ops = {
+ .hs_hash = gen_hash,
+ .hs_key = gen_key,
+ .hs_keycmp = gen_kepcmp,
+ .hs_object = gen_export_object,
+ .hs_get = gen_export_get,
+ .hs_put_locked = gen_export_put_locked,
+};
{ LAST_RCVD, { FID_SEQ_LOCAL_FILE, LAST_RECV_OID, 0 }, OLF_SHOW_NAME,
sizeof(LAST_RCVD) - 1, NULL, NULL },
+ /* reply_data */
+ { REPLY_DATA, { FID_SEQ_LOCAL_FILE, REPLY_DATA_OID, 0 }, OLF_SHOW_NAME,
+ sizeof(REPLY_DATA) - 1, NULL, NULL },
+
/* lov_objid */
{ LOV_OBJID, { FID_SEQ_LOCAL_FILE, MDD_LOV_OBJ_OID, 0 }, OLF_SHOW_NAME,
sizeof(LOV_OBJID) - 1, NULL, NULL },
{ OFD_HEALTH_CHECK_OID, HEALTH_CHECK },
{ ACCT_USER_OID, "acct_usr_inode" },
{ ACCT_GROUP_OID, "acct_grp_inode" },
+ { REPLY_DATA_OID, REPLY_DATA },
{ 0, NULL }
};
/* sanity check: if the xid matches, the request must be marked as a
* resent or replayed */
- if (req_xid_is_last(req)) {
+ if (req_can_reconstruct(req, NULL)) {
if (!(lustre_msg_get_flags(req->rq_reqmsg) &
(MSG_RESENT | MSG_REPLAY))) {
DEBUG_REQ(D_WARNING, req, "rq_xid "LPU64" matches "
- "last_xid, expected REPLAY or RESENT flag "
+ "saved xid, expected REPLAY or RESENT flag "
"(%x)", req->rq_xid,
lustre_msg_get_flags(req->rq_reqmsg));
req->rq_status = -ENOTCONN;
request_fail_id = tgt->lut_request_fail_id;
tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id;
+ /* try to release in-memory reply data */
+ if (tgt_is_multimodrpcs_client(req->rq_export)) {
+ tgt_handle_received_xid(req->rq_export,
+ lustre_msg_get_last_xid(req->rq_reqmsg));
+ if (!(lustre_msg_get_flags(req->rq_reqmsg) &
+ (MSG_RESENT | MSG_REPLAY)))
+ tgt_handle_tag(req->rq_export,
+ lustre_msg_get_tag(req->rq_reqmsg));
+ }
+
h = tgt_handler_find_check(req);
if (IS_ERR(h)) {
req->rq_status = PTR_ERR(h);
RETURN(rc);
}
EXPORT_SYMBOL(tgt_brw_write);
+
+/* Check if request can be reconstructed from saved reply data
+ * A copy of the reply data is returned in @trd if the pointer is not NULL
+ */
+bool req_can_reconstruct(struct ptlrpc_request *req,
+ struct tg_reply_data *trd)
+{
+ struct tg_export_data *ted = &req->rq_export->exp_target_data;
+ struct lsd_client_data *lcd = ted->ted_lcd;
+ bool found;
+
+ if (tgt_is_multimodrpcs_client(req->rq_export))
+ return tgt_lookup_reply(req, trd);
+
+ mutex_lock(&ted->ted_lcd_lock);
+ found = req->rq_xid == lcd->lcd_last_xid ||
+ req->rq_xid == lcd->lcd_last_close_xid;
+
+ if (found && trd != NULL) {
+ if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
+ trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
+ trd->trd_reply.lrd_transno =
+ lcd->lcd_last_close_transno;
+ trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
+ } else {
+ trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
+ trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
+ trd->trd_reply.lrd_result = lcd->lcd_last_result;
+ trd->trd_reply.lrd_data = lcd->lcd_last_data;
+ trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
+ trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
+ trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
+ trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
+ }
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ return found;
+}
+EXPORT_SYMBOL(req_can_reconstruct);
+
/* server and client data buffers */
struct lr_server_data tti_lsd;
struct lsd_client_data tti_lcd;
+ struct lsd_reply_data tti_lrd;
struct lu_buf tti_buf;
loff_t tti_off;
void *cookie);
int tgt_txn_stop_cb(const struct lu_env *env, struct thandle *th,
void *cookie);
+int tgt_handle_received_xid(struct obd_export *exp, __u64 rcvd_xid);
+int tgt_handle_tag(struct obd_export *exp, __u16 tag);
void update_records_dump(const struct update_records *records,
unsigned int mask, bool dump_updates);
#include "tgt_internal.h"
+
+/* Allocate a bitmap for a chunk of reply data slots */
+static int tgt_bitmap_chunk_alloc(struct lu_target *lut, int chunk)
+{
+ unsigned long *bm;
+
+ OBD_ALLOC(bm, BITS_TO_LONGS(LUT_REPLY_SLOTS_PER_CHUNK) * sizeof(long));
+ if (bm == NULL)
+ return -ENOMEM;
+
+ spin_lock(&lut->lut_client_bitmap_lock);
+
+ if (lut->lut_reply_bitmap[chunk] != NULL) {
+ /* someone else already allocated the bitmap for this chunk */
+ spin_unlock(&lut->lut_client_bitmap_lock);
+ OBD_FREE(bm, BITS_TO_LONGS(LUT_REPLY_SLOTS_PER_CHUNK) *
+ sizeof(long));
+ return 0;
+ }
+
+ lut->lut_reply_bitmap[chunk] = bm;
+
+ spin_unlock(&lut->lut_client_bitmap_lock);
+
+ return 0;
+}
+
+/* Look for an available reply data slot in the bitmap
+ * of the target @lut
+ * Allocate bitmap chunk when first used
+ * XXX algo could be improved if this routine limits performance
+ */
+static int tgt_find_free_reply_slot(struct lu_target *lut)
+{
+ unsigned long *bmp;
+ int chunk = 0;
+ int rc;
+ int b;
+
+ for (chunk = 0; chunk < LUT_REPLY_SLOTS_MAX_CHUNKS; chunk++) {
+ /* allocate the bitmap chunk if necessary */
+ if (unlikely(lut->lut_reply_bitmap[chunk] == NULL)) {
+ rc = tgt_bitmap_chunk_alloc(lut, chunk);
+ if (rc != 0)
+ return rc;
+ }
+ bmp = lut->lut_reply_bitmap[chunk];
+
+ /* look for an available slot in this chunk */
+ do {
+ b = find_first_zero_bit(bmp, LUT_REPLY_SLOTS_PER_CHUNK);
+ if (b >= LUT_REPLY_SLOTS_PER_CHUNK)
+ break;
+
+ /* found one */
+ if (test_and_set_bit(b, bmp) == 0)
+ return chunk * LUT_REPLY_SLOTS_PER_CHUNK + b;
+ } while (true);
+ }
+
+ return -ENOSPC;
+}
+
+/* Mark the reply data slot @idx 'used' in the corresponding bitmap chunk
+ * of the target @lut
+ * Allocate the bitmap chunk if necessary
+ */
+static int tgt_set_reply_slot(struct lu_target *lut, int idx)
+{
+ int chunk;
+ int b;
+ int rc;
+
+ chunk = idx / LUT_REPLY_SLOTS_PER_CHUNK;
+ b = idx % LUT_REPLY_SLOTS_PER_CHUNK;
+
+ LASSERT(chunk < LUT_REPLY_SLOTS_MAX_CHUNKS);
+ LASSERT(b < LUT_REPLY_SLOTS_PER_CHUNK);
+
+ /* allocate the bitmap chunk if necessary */
+ if (unlikely(lut->lut_reply_bitmap[chunk] == NULL)) {
+ rc = tgt_bitmap_chunk_alloc(lut, chunk);
+ if (rc != 0)
+ return rc;
+ }
+
+ /* mark the slot 'used' in this chunk */
+ if (test_and_set_bit(b, lut->lut_reply_bitmap[chunk]) != 0) {
+ CERROR("%s: slot %d already set in bitmap\n",
+ tgt_name(lut), idx);
+ return -EALREADY;
+ }
+
+ return 0;
+}
+
+
+/* Mark the reply data slot @idx 'unused' in the corresponding bitmap chunk
+ * of the target @lut
+ */
+static int tgt_clear_reply_slot(struct lu_target *lut, int idx)
+{
+ int chunk;
+ int b;
+
+ chunk = idx / LUT_REPLY_SLOTS_PER_CHUNK;
+ b = idx % LUT_REPLY_SLOTS_PER_CHUNK;
+
+ LASSERT(chunk < LUT_REPLY_SLOTS_MAX_CHUNKS);
+ LASSERT(b < LUT_REPLY_SLOTS_PER_CHUNK);
+
+ if (test_and_clear_bit(b, lut->lut_reply_bitmap[chunk]) == 0) {
+ CERROR("%s: slot %d already clear in bitmap\n",
+ tgt_name(lut), idx);
+ return -EALREADY;
+ }
+
+ return 0;
+}
+
+
+/* Read header of reply_data file of target @tgt into structure @lrh */
+static int tgt_reply_header_read(const struct lu_env *env,
+ struct lu_target *tgt,
+ struct lsd_reply_header *lrh)
+{
+ int rc;
+ struct lsd_reply_header buf;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+
+ tti->tti_off = 0;
+ tti->tti_buf.lb_buf = &buf;
+ tti->tti_buf.lb_len = sizeof(buf);
+
+ rc = dt_record_read(env, tgt->lut_reply_data, &tti->tti_buf,
+ &tti->tti_off);
+ if (rc != 0)
+ return rc;
+
+ lrh->lrh_magic = le32_to_cpu(buf.lrh_magic);
+ lrh->lrh_header_size = le32_to_cpu(buf.lrh_header_size);
+ lrh->lrh_reply_size = le32_to_cpu(buf.lrh_reply_size);
+
+ CDEBUG(D_HA, "%s: read %s header. magic=0x%08x "
+ "header_size=%d reply_size=%d\n",
+ tgt->lut_obd->obd_name, REPLY_DATA,
+ lrh->lrh_magic, lrh->lrh_header_size, lrh->lrh_reply_size);
+
+ return 0;
+}
+
+/* Write header into replay_data file of target @tgt from structure @lrh */
+static int tgt_reply_header_write(const struct lu_env *env,
+ struct lu_target *tgt,
+ struct lsd_reply_header *lrh)
+{
+ int rc;
+ struct lsd_reply_header buf;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct thandle *th;
+ struct dt_object *dto;
+
+ CDEBUG(D_HA, "%s: write %s header. magic=0x%08x "
+ "header_size=%d reply_size=%d\n",
+ tgt->lut_obd->obd_name, REPLY_DATA,
+ lrh->lrh_magic, lrh->lrh_header_size, lrh->lrh_reply_size);
+
+ buf.lrh_magic = cpu_to_le32(lrh->lrh_magic);
+ buf.lrh_header_size = cpu_to_le32(lrh->lrh_header_size);
+ buf.lrh_reply_size = cpu_to_le32(lrh->lrh_reply_size);
+
+ th = dt_trans_create(env, tgt->lut_bottom);
+ if (IS_ERR(th))
+ return PTR_ERR(th);
+ th->th_sync = 1;
+
+ tti->tti_off = 0;
+ tti->tti_buf.lb_buf = &buf;
+ tti->tti_buf.lb_len = sizeof(buf);
+
+ rc = dt_declare_record_write(env, tgt->lut_reply_data,
+ &tti->tti_buf, tti->tti_off, th);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = dt_trans_start(env, tgt->lut_bottom, th);
+ if (rc)
+ GOTO(out, rc);
+
+ dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
+ rc = dt_record_write(env, dto, &tti->tti_buf, &tti->tti_off, th);
+out:
+ dt_trans_stop(env, tgt->lut_bottom, th);
+ return rc;
+}
+
+/* Write the reply data @lrd into reply_data file of target @tgt
+ * at offset @off
+ */
+static int tgt_reply_data_write(const struct lu_env *env, struct lu_target *tgt,
+ struct lsd_reply_data *lrd, loff_t off,
+ struct thandle *th)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct dt_object *dto;
+ struct lsd_reply_data *buf = &tti->tti_lrd;
+
+ lrd->lrd_result = ptlrpc_status_hton(lrd->lrd_result);
+
+ buf->lrd_transno = cpu_to_le64(lrd->lrd_transno);
+ buf->lrd_xid = cpu_to_le64(lrd->lrd_xid);
+ buf->lrd_data = cpu_to_le64(lrd->lrd_data);
+ buf->lrd_result = cpu_to_le32(lrd->lrd_result);
+ buf->lrd_client_gen = cpu_to_le32(lrd->lrd_client_gen);
+
+ lrd->lrd_result = ptlrpc_status_ntoh(lrd->lrd_result);
+
+ tti->tti_off = off;
+ tti->tti_buf.lb_buf = buf;
+ tti->tti_buf.lb_len = sizeof(*buf);
+
+ dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
+ return dt_record_write(env, dto, &tti->tti_buf, &tti->tti_off, th);
+}
+
+/* Read the reply data from reply_data file of target @tgt at offset @off
+ * into structure @lrd
+ */
+static int tgt_reply_data_read(const struct lu_env *env, struct lu_target *tgt,
+ struct lsd_reply_data *lrd, loff_t off)
+{
+ int rc;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct lsd_reply_data *buf = &tti->tti_lrd;
+
+ tti->tti_off = off;
+ tti->tti_buf.lb_buf = buf;
+ tti->tti_buf.lb_len = sizeof(*buf);
+
+ rc = dt_record_read(env, tgt->lut_reply_data, &tti->tti_buf,
+ &tti->tti_off);
+ if (rc != 0)
+ return rc;
+
+ lrd->lrd_transno = le64_to_cpu(buf->lrd_transno);
+ lrd->lrd_xid = le64_to_cpu(buf->lrd_xid);
+ lrd->lrd_data = le64_to_cpu(buf->lrd_data);
+ lrd->lrd_result = le32_to_cpu(buf->lrd_result);
+ lrd->lrd_client_gen = le32_to_cpu(buf->lrd_client_gen);
+
+ return 0;
+}
+
+
+/* Free the in-memory reply data structure @trd and release
+ * the corresponding slot in the reply_data file of target @lut
+ * Called with ted_lcd_lock held
+ */
+static void tgt_free_reply_data(struct lu_target *lut,
+ struct tg_export_data *ted,
+ struct tg_reply_data *trd)
+{
+ CDEBUG(D_TRACE, "%s: free reply data %p: xid %llu, transno %llu, "
+ "client gen %u, slot idx %d\n",
+ tgt_name(lut), trd, trd->trd_reply.lrd_xid,
+ trd->trd_reply.lrd_transno, trd->trd_reply.lrd_client_gen,
+ trd->trd_index);
+
+ LASSERT(mutex_is_locked(&ted->ted_lcd_lock));
+
+ list_del(&trd->trd_list);
+ ted->ted_reply_cnt--;
+ tgt_clear_reply_slot(lut, trd->trd_index);
+ OBD_FREE_PTR(trd);
+}
+
+/* Release the reply data @trd from target @lut
+ * The reply data with the highest transno for this export
+ * is retained to ensure correctness of target recovery
+ * Called with ted_lcd_lock held
+ */
+static void tgt_release_reply_data(struct lu_target *lut,
+ struct tg_export_data *ted,
+ struct tg_reply_data *trd)
+{
+ CDEBUG(D_TRACE, "%s: release reply data %p: xid %llu, transno %llu, "
+ "client gen %u, slot idx %d\n",
+ tgt_name(lut), trd, trd->trd_reply.lrd_xid,
+ trd->trd_reply.lrd_transno, trd->trd_reply.lrd_client_gen,
+ trd->trd_index);
+
+ LASSERT(mutex_is_locked(&ted->ted_lcd_lock));
+
+ /* Do not free the reply data corresponding to the
+ * highest transno of this export.
+ * This ensures on-disk reply data is kept and
+ * last committed transno can be restored from disk in case
+ * of target recovery
+ */
+ if (trd->trd_reply.lrd_transno == ted->ted_lcd->lcd_last_transno) {
+ /* free previous retained reply */
+ if (ted->ted_reply_last != NULL)
+ tgt_free_reply_data(lut, ted, ted->ted_reply_last);
+ /* retain the reply */
+ list_del_init(&trd->trd_list);
+ ted->ted_reply_last = trd;
+ } else {
+ tgt_free_reply_data(lut, ted, trd);
+ }
+}
+
static inline struct lu_buf *tti_buf_lsd(struct tgt_thread_info *tti)
{
tti->tti_buf.lb_buf = &tti->tti_lsd;
RETURN(-ENOMEM);
/* Mark that slot is not yet valid, 0 doesn't work here */
exp->exp_target_data.ted_lr_idx = -1;
+ INIT_LIST_HEAD(&exp->exp_target_data.ted_reply_list);
RETURN(0);
}
EXPORT_SYMBOL(tgt_client_alloc);
{
struct tg_export_data *ted = &exp->exp_target_data;
struct lu_target *lut = class_exp2tgt(exp);
+ struct tg_reply_data *trd, *tmp;
LASSERT(exp != exp->exp_obd->obd_self_export);
+ /* free reply data */
+ mutex_lock(&ted->ted_lcd_lock);
+ list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
+ tgt_release_reply_data(lut, ted, trd);
+ }
+ if (ted->ted_reply_last != NULL) {
+ tgt_free_reply_data(lut, ted, ted->ted_reply_last);
+ ted->ted_reply_last = NULL;
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ if (!hlist_unhashed(&exp->exp_gen_hash))
+ cfs_hash_del(exp->exp_obd->obd_gen_hash,
+ &ted->ted_lcd->lcd_generation,
+ &exp->exp_gen_hash);
+
OBD_FREE_PTR(ted->ted_lcd);
ted->ted_lcd = NULL;
exp->exp_obd->obd_name, ted->ted_lr_idx);
LBUG();
}
+
+ if (tgt_is_multimodrpcs_client(exp) && !exp->exp_obd->obd_stopping)
+ atomic_dec(&lut->lut_num_clients);
}
EXPORT_SYMBOL(tgt_client_free);
spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
list_splice_init(&client_list, &tgt->lut_obd->obd_final_req_queue);
spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
+
+ /** Clear MULTI RPCS incompatibility flag if
+ * - target is MDT and
+ * - there is no client to recover or the recovery was aborted
+ */
+ if (!strncmp(tgt->lut_obd->obd_type->typ_name, LUSTRE_MDT_NAME, 3) &&
+ (tgt->lut_obd->obd_max_recoverable_clients == 0 ||
+ tgt->lut_obd->obd_abort_recovery))
+ tgt->lut_lsd.lsd_feature_incompat &= ~OBD_INCOMPAT_MULTI_RPCS;
+
/** update server epoch */
tgt_server_data_update(&env, tgt, 1);
lu_env_fini(&env);
goto repeat;
}
- CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added\n",
- tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid);
-
ted->ted_lr_idx = idx;
ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
idx * tgt->lut_lsd.lsd_client_size;
LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
- CDEBUG(D_INFO, "%s: new client at index %d (%llu) with UUID '%s'\n",
+ if (tgt_is_multimodrpcs_client(exp)) {
+ /* Set MULTI RPCS incompatibility flag to prevent previous
+ * Lustre versions to mount a target with reply_data file */
+ atomic_inc(&tgt->lut_num_clients);
+ if (!(tgt->lut_lsd.lsd_feature_incompat &
+ OBD_INCOMPAT_MULTI_RPCS)) {
+ tgt->lut_lsd.lsd_feature_incompat |=
+ OBD_INCOMPAT_MULTI_RPCS;
+ rc = tgt_server_data_update(env, tgt, 1);
+ if (rc < 0) {
+ CERROR("%s: unable to set MULTI RPCS "
+ "incompatibility flag\n",
+ exp->exp_obd->obd_name);
+ RETURN(rc);
+ }
+ }
+
+ /* assign client slot generation */
+ ted->ted_lcd->lcd_generation =
+ atomic_inc_return(&tgt->lut_client_generation);
+ } else {
+ ted->ted_lcd->lcd_generation = 0;
+ }
+
+ CDEBUG(D_INFO, "%s: new client at index %d (%llu) with UUID '%s' "
+ "generation %d\n",
tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
- ted->ted_lcd->lcd_uuid);
+ ted->ted_lcd->lcd_uuid, ted->ted_lcd->lcd_generation);
if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
RETURN(-ENOSPC);
}
EXPORT_SYMBOL(tgt_client_new);
-/* Add client data to the MDS. We use a bitmap to locate a free space
- * in the last_rcvd file if cl_off is -1 (i.e. a new client).
- * Otherwise, we just have to read the data from the last_rcvd file and
- * we know its offset.
+/* Add an existing client to the MDS in-memory state based on
+ * a client that was previously found in the last_rcvd file and
+ * already has an assigned slot (idx >= 0).
*
* It should not be possible to fail adding an existing client - otherwise
* mdt_init_server_data() callsite needs to be fixed.
tgt->lut_obd->obd_name, idx);
LBUG();
}
+ atomic_inc(&tgt->lut_num_clients);
- CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added\n",
- tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid);
+ CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added, "
+ "generation %d\n",
+ tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid,
+ ted->ted_lcd->lcd_generation);
ted->ted_lr_idx = idx;
ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
GOTO(srv_update, rc = 0);
}
+ /* Target that supports multiple reply data */
+ if (tgt_is_multimodrpcs_client(req->rq_export)) {
+ struct tg_reply_data *trd;
+ struct lsd_reply_data *lrd;
+ __u64 *pre_versions;
+ int i;
+ loff_t off;
+
+ OBD_ALLOC_PTR(trd);
+ if (unlikely(trd == NULL))
+ GOTO(srv_update, rc = -ENOMEM);
+
+ /* update export last transno */
+ mutex_lock(&ted->ted_lcd_lock);
+ if (tti->tti_transno > ted->ted_lcd->lcd_last_transno)
+ ted->ted_lcd->lcd_last_transno = tti->tti_transno;
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ /* fill reply data information */
+ lrd = &trd->trd_reply;
+ lrd->lrd_transno = tti->tti_transno;
+ lrd->lrd_xid = req->rq_xid;
+ lrd->lrd_result = th->th_result;
+ lrd->lrd_data = opdata;
+ lrd->lrd_client_gen = ted->ted_lcd->lcd_generation;
+ trd->trd_tag = lustre_msg_get_tag(req->rq_reqmsg);
+ pre_versions = lustre_msg_get_versions(req->rq_repmsg);
+ if (pre_versions) {
+ trd->trd_pre_versions[0] = pre_versions[0];
+ trd->trd_pre_versions[1] = pre_versions[1];
+ trd->trd_pre_versions[2] = pre_versions[2];
+ trd->trd_pre_versions[3] = pre_versions[3];
+ }
+
+ /* find a empty slot */
+ i = tgt_find_free_reply_slot(tgt);
+ if (unlikely(i < 0)) {
+ CERROR("%s: couldn't find a slot for reply data: "
+ "rc = %d\n", tgt_name(tgt), i);
+ GOTO(srv_update, rc = i);
+ }
+ trd->trd_index = i;
+
+ /* write reply data to disk */
+ off = sizeof(struct lsd_reply_header) + sizeof(*lrd) * i;
+ rc = tgt_reply_data_write(env, tgt, lrd, off, th);
+ if (unlikely(rc != 0)) {
+ CERROR("%s: can't update %s file: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ RETURN(rc);
+ }
+
+ /* add reply data to target export's reply list */
+ mutex_lock(&ted->ted_lcd_lock);
+ list_add(&trd->trd_list, &ted->ted_reply_list);
+ ted->ted_reply_cnt++;
+ if (ted->ted_reply_cnt > ted->ted_reply_max)
+ ted->ted_reply_max = ted->ted_reply_cnt;
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ CDEBUG(D_TRACE, "add reply %p: xid %llu, transno %llu, "
+ "tag %hu, client gen %u, slot idx %d\n",
+ trd, lrd->lrd_xid, lrd->lrd_transno,
+ trd->trd_tag, lrd->lrd_client_gen, i);
+
+ GOTO(srv_update, rc = 0);
+ }
+
mutex_lock(&ted->ted_lcd_lock);
LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
int cl_idx;
int rc = 0;
loff_t off = lsd->lsd_client_start;
+ __u32 generation = 0;
+ struct cfs_hash *hash = NULL;
ENTRY;
if (lcd == NULL)
RETURN(-ENOMEM);
+ hash = cfs_hash_getref(tgt->lut_obd->obd_gen_hash);
+ if (hash == NULL)
+ GOTO(err_out, rc = -ENODEV);
+
for (cl_idx = 0; off < last_size; cl_idx++) {
struct obd_export *exp;
__u64 last_transno;
* need to be set up like real exports as connect does.
*/
CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
- " srv lr: "LPU64" lx: "LPU64"\n", lcd->lcd_uuid, cl_idx,
- last_transno, lsd->lsd_last_transno, lcd_last_xid(lcd));
+ " srv lr: "LPU64" lx: "LPU64" gen %u\n", lcd->lcd_uuid,
+ cl_idx, last_transno, lsd->lsd_last_transno,
+ lcd_last_xid(lcd), lcd->lcd_generation);
exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
if (IS_ERR(exp)) {
exp->exp_in_recovery = 0;
spin_unlock(&exp->exp_lock);
obd->obd_max_recoverable_clients++;
+
+ if (tgt->lut_lsd.lsd_feature_incompat &
+ OBD_INCOMPAT_MULTI_RPCS &&
+ lcd->lcd_generation != 0) {
+ /* compute the highest valid client generation */
+ generation = max(generation, lcd->lcd_generation);
+
+ /* fill client_generation <-> export hash table */
+ rc = cfs_hash_add_unique(hash, &lcd->lcd_generation,
+ &exp->exp_gen_hash);
+ if (rc != 0) {
+ CERROR("%s: duplicate export for client "
+ "generation %u\n",
+ tgt_name(tgt), lcd->lcd_generation);
+ class_export_put(exp);
+ GOTO(err_out, rc);
+ }
+ }
+
class_export_put(exp);
/* Need to check last_rcvd even for duplicated exports. */
spin_unlock(&tgt->lut_translock);
}
+ /* record highest valid client generation */
+ atomic_set(&tgt->lut_client_generation, generation);
+
err_out:
+ if (hash != NULL)
+ cfs_hash_putref(hash);
OBD_FREE_PTR(lcd);
RETURN(rc);
}
.rocompat = OBD_ROCOMPAT_LOVOBJID,
.incompat = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
OBD_INCOMPAT_FID | OBD_INCOMPAT_IAM_DIR |
- OBD_INCOMPAT_LMM_VER | OBD_INCOMPAT_MULTI_OI,
+ OBD_INCOMPAT_LMM_VER | OBD_INCOMPAT_MULTI_OI |
+ OBD_INCOMPAT_MULTI_RPCS,
.rocinit = OBD_ROCOMPAT_LOVOBJID,
.incinit = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
OBD_INCOMPAT_MULTI_OI,
tgt_ses_req(tsi));
return rc;
}
+
+int tgt_reply_data_init(const struct lu_env *env, struct lu_target *tgt)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct lsd_reply_data *lrd = &tti->tti_lrd;
+ unsigned long reply_data_size;
+ int rc;
+ struct lsd_reply_header *lrh = NULL;
+ struct lsd_client_data *lcd = NULL;
+ struct tg_reply_data *trd = NULL;
+ int idx;
+ loff_t off;
+ struct cfs_hash *hash = NULL;
+ struct obd_export *exp;
+ struct obd_export *tmp;
+ struct tg_export_data *ted;
+ int reply_data_recovered = 0;
+
+ rc = dt_attr_get(env, tgt->lut_reply_data, &tti->tti_attr);
+ if (rc)
+ GOTO(out, rc);
+ reply_data_size = (unsigned long)tti->tti_attr.la_size;
+
+ OBD_ALLOC_PTR(lrh);
+ if (lrh == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ if (reply_data_size == 0) {
+ CDEBUG(D_INFO, "%s: new reply_data file, initializing\n",
+ tgt_name(tgt));
+ lrh->lrh_magic = LRH_MAGIC;
+ lrh->lrh_header_size = sizeof(struct lsd_reply_header);
+ lrh->lrh_reply_size = sizeof(struct lsd_reply_data);
+ rc = tgt_reply_header_write(env, tgt, lrh);
+ if (rc) {
+ CERROR("%s: error writing %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ GOTO(out, rc);
+ }
+ } else {
+ rc = tgt_reply_header_read(env, tgt, lrh);
+ if (rc) {
+ CERROR("%s: error reading %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ GOTO(out, rc);
+ }
+ if (lrh->lrh_magic != LRH_MAGIC ||
+ lrh->lrh_header_size != sizeof(struct lsd_reply_header) ||
+ lrh->lrh_reply_size != sizeof(struct lsd_reply_data)) {
+ CERROR("%s: invalid header in %s\n",
+ tgt_name(tgt), REPLY_DATA);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ hash = cfs_hash_getref(tgt->lut_obd->obd_gen_hash);
+ if (hash == NULL)
+ GOTO(out, rc = -ENODEV);
+
+ OBD_ALLOC_PTR(lcd);
+ if (lcd == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ OBD_ALLOC_PTR(trd);
+ if (trd == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ /* Load reply_data from disk */
+ for (idx = 0, off = sizeof(struct lsd_reply_header);
+ off < reply_data_size;
+ idx++, off += sizeof(struct lsd_reply_data)) {
+ rc = tgt_reply_data_read(env, tgt, lrd, off);
+ if (rc) {
+ CERROR("%s: error reading %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ GOTO(out, rc);
+ }
+
+ exp = cfs_hash_lookup(hash, &lrd->lrd_client_gen);
+ if (exp == NULL) {
+ /* old reply data from a disconnected client */
+ continue;
+ }
+ ted = &exp->exp_target_data;
+ mutex_lock(&ted->ted_lcd_lock);
+
+ /* create in-memory reply_data and link it to
+ * target export's reply list */
+ tgt_set_reply_slot(tgt, idx);
+ trd->trd_reply = *lrd;
+ trd->trd_pre_versions[0] = 0;
+ trd->trd_pre_versions[1] = 0;
+ trd->trd_pre_versions[2] = 0;
+ trd->trd_pre_versions[3] = 0;
+ trd->trd_index = idx;
+ trd->trd_tag = 0;
+ list_add(&trd->trd_list, &ted->ted_reply_list);
+ ted->ted_reply_cnt++;
+ if (ted->ted_reply_cnt > ted->ted_reply_max)
+ ted->ted_reply_max = ted->ted_reply_cnt;
+
+ CDEBUG(D_HA, "%s: restore reply %p: xid %llu, "
+ "transno %llu, client gen %u, slot idx %d\n",
+ tgt_name(tgt), trd, lrd->lrd_xid,
+ lrd->lrd_transno, lrd->lrd_client_gen,
+ trd->trd_index);
+
+ /* update export last committed transation */
+ exp->exp_last_committed = max(exp->exp_last_committed,
+ lrd->lrd_transno);
+
+ mutex_unlock(&ted->ted_lcd_lock);
+ class_export_put(exp);
+
+ /* update target last committed transaction */
+ spin_lock(&tgt->lut_translock);
+ tgt->lut_last_transno = max(tgt->lut_last_transno,
+ lrd->lrd_transno);
+ spin_unlock(&tgt->lut_translock);
+
+ reply_data_recovered++;
+
+ OBD_ALLOC_PTR(trd);
+ if (trd == NULL)
+ GOTO(out, rc = -ENOMEM);
+ }
+ CDEBUG(D_INFO, "%s: %d reply data have been recovered\n",
+ tgt_name(tgt), reply_data_recovered);
+
+ /* delete entries from client_generation<->export hash */
+ spin_lock(&tgt->lut_obd->obd_dev_lock);
+ list_for_each_entry_safe(exp, tmp,
+ &tgt->lut_obd->obd_exports,
+ exp_obd_chain) {
+ struct tg_export_data *ted = &exp->exp_target_data;
+
+ if (!hlist_unhashed(&exp->exp_gen_hash))
+ cfs_hash_del(hash,
+ &ted->ted_lcd->lcd_generation,
+ &exp->exp_gen_hash);
+ }
+ spin_unlock(&tgt->lut_obd->obd_dev_lock);
+ }
+
+ rc = 0;
+
+out:
+ if (hash != NULL)
+ cfs_hash_putref(hash);
+ if (lcd != NULL)
+ OBD_FREE_PTR(lcd);
+ if (trd != NULL)
+ OBD_FREE_PTR(trd);
+ if (lrh != NULL)
+ OBD_FREE_PTR(lrh);
+ return rc;
+}
+
+/* Look for a reply data matching specified request @req
+ * A copy is returned in @trd if the pointer is not NULL
+ */
+bool tgt_lookup_reply(struct ptlrpc_request *req, struct tg_reply_data *trd)
+{
+ struct tg_export_data *ted = &req->rq_export->exp_target_data;
+ struct tg_reply_data *reply, *tmp;
+ bool found = false;
+
+ mutex_lock(&ted->ted_lcd_lock);
+ list_for_each_entry_safe(reply, tmp, &ted->ted_reply_list, trd_list) {
+ if (reply->trd_reply.lrd_xid == req->rq_xid) {
+ found = true;
+ break;
+ }
+ }
+ if (found && trd != NULL)
+ *trd = *reply;
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ CDEBUG(D_TRACE, "%s: lookup reply xid %llu, found %d\n",
+ tgt_name(class_exp2tgt(req->rq_export)), req->rq_xid,
+ found ? 1 : 0);
+
+ return found;
+}
+EXPORT_SYMBOL(tgt_lookup_reply);
+
+int tgt_handle_received_xid(struct obd_export *exp, __u64 rcvd_xid)
+{
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *lut = class_exp2tgt(exp);
+ struct tg_reply_data *trd, *tmp;
+
+ mutex_lock(&ted->ted_lcd_lock);
+ list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
+ if (trd->trd_reply.lrd_xid > rcvd_xid)
+ continue;
+ ted->ted_release_xid++;
+ tgt_release_reply_data(lut, ted, trd);
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ return 0;
+}
+
+int tgt_handle_tag(struct obd_export *exp, __u16 tag)
+{
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *lut = class_exp2tgt(exp);
+ struct tg_reply_data *trd, *tmp;
+
+ if (tag == 0)
+ return 0;
+
+ mutex_lock(&ted->ted_lcd_lock);
+ list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
+ if (trd->trd_tag != tag)
+ continue;
+ ted->ted_release_tag++;
+ tgt_release_reply_data(lut, ted, trd);
+ break;
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ return 0;
+}
+
lut->lut_bottom = dt;
lut->lut_last_rcvd = NULL;
lut->lut_client_bitmap = NULL;
+ atomic_set(&lut->lut_num_clients, 0);
+ atomic_set(&lut->lut_client_generation, 0);
+ lut->lut_reply_data = NULL;
+ lut->lut_reply_bitmap = NULL;
obd->u.obt.obt_lut = lut;
obd->u.obt.obt_magic = OBT_MAGIC;
rc = PTR_ERR(o);
CERROR("%s: cannot open LAST_RCVD: rc = %d\n", tgt_name(lut),
rc);
- GOTO(out_bitmap, rc);
+ GOTO(out, rc);
}
lut->lut_last_rcvd = o;
rc = tgt_server_data_init(env, lut);
if (rc < 0)
- GOTO(out_obj, rc);
+ GOTO(out, rc);
/* prepare transactions callbacks */
lut->lut_txn_cb.dtc_txn_start = tgt_txn_start_cb;
dt_txn_callback_add(lut->lut_bottom, &lut->lut_txn_cb);
lut->lut_bottom->dd_lu_dev.ld_site->ls_tgt = lut;
+ /* reply_data is supported by MDT targets only for now */
+ if (strncmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME, 3) != 0)
+ RETURN(0);
+
+ OBD_ALLOC(lut->lut_reply_bitmap,
+ LUT_REPLY_SLOTS_MAX_CHUNKS * sizeof(unsigned long *));
+ if (lut->lut_reply_bitmap == NULL)
+ GOTO(out, rc);
+
+ memset(&attr, 0, sizeof(attr));
+ attr.la_valid = LA_MODE;
+ attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
+ dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ lu_local_obj_fid(&fid, REPLY_DATA_OID);
+
+ o = dt_find_or_create(env, lut->lut_bottom, &fid, &dof, &attr);
+ if (IS_ERR(o)) {
+ rc = PTR_ERR(o);
+ CERROR("%s: cannot open REPLY_DATA: rc = %d\n", tgt_name(lut),
+ rc);
+ GOTO(out, rc);
+ }
+ lut->lut_reply_data = o;
+
+ rc = tgt_reply_data_init(env, lut);
+ if (rc < 0)
+ GOTO(out, rc);
+
RETURN(0);
-out_obj:
- lu_object_put(env, &lut->lut_last_rcvd->do_lu);
+out:
+ if (lut->lut_last_rcvd != NULL)
+ lu_object_put(env, &lut->lut_last_rcvd->do_lu);
lut->lut_last_rcvd = NULL;
-out_bitmap:
- OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
+ if (lut->lut_client_bitmap != NULL)
+ OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
lut->lut_client_bitmap = NULL;
+ if (lut->lut_reply_data != NULL)
+ lu_object_put(env, &lut->lut_reply_data->do_lu);
+ lut->lut_reply_data = NULL;
+ if (lut->lut_reply_bitmap != NULL)
+ OBD_FREE(lut->lut_reply_bitmap,
+ LUT_REPLY_SLOTS_MAX_CHUNKS * sizeof(unsigned long *));
+ lut->lut_reply_bitmap = NULL;
return rc;
}
EXPORT_SYMBOL(tgt_init);
void tgt_fini(const struct lu_env *env, struct lu_target *lut)
{
+ int i;
+ int rc;
ENTRY;
+ if (lut->lut_lsd.lsd_feature_incompat & OBD_INCOMPAT_MULTI_RPCS &&
+ atomic_read(&lut->lut_num_clients) == 0) {
+ /* Clear MULTI RPCS incompatibility flag that prevents previous
+ * Lustre versions to mount a target with reply_data file */
+ lut->lut_lsd.lsd_feature_incompat &= ~OBD_INCOMPAT_MULTI_RPCS;
+ rc = tgt_server_data_update(env, lut, 1);
+ if (rc < 0)
+ CERROR("%s: unable to clear MULTI RPCS "
+ "incompatibility flag\n",
+ lut->lut_obd->obd_name);
+ }
+
sptlrpc_rule_set_free(&lut->lut_sptlrpc_rset);
+ if (lut->lut_reply_data != NULL)
+ lu_object_put(env, &lut->lut_reply_data->do_lu);
+ lut->lut_reply_data = NULL;
+ if (lut->lut_reply_bitmap != NULL) {
+ for (i = 0; i < LUT_REPLY_SLOTS_MAX_CHUNKS; i++) {
+ if (lut->lut_reply_bitmap[i] != NULL)
+ OBD_FREE(lut->lut_reply_bitmap[i],
+ BITS_TO_LONGS(LUT_REPLY_SLOTS_PER_CHUNK) *
+ sizeof(long));
+ lut->lut_reply_bitmap[i] = NULL;
+ }
+ OBD_FREE(lut->lut_reply_bitmap,
+ LUT_REPLY_SLOTS_MAX_CHUNKS * sizeof(unsigned long *));
+ }
+ lut->lut_reply_bitmap = NULL;
if (lut->lut_client_bitmap) {
OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
lut->lut_client_bitmap = NULL;
git://git.whamcloud.com / fs / lustre-release.git / commitdiff