* GPL HEADER END
*/
/*
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* lustre/target/tgt_main.c
#include "tgt_internal.h"
#include "../ptlrpc/ptlrpc_internal.h"
+/*
+ * Save cross-MDT lock in lut_slc_locks.
+ *
+ * Lock R/W count is not saved, but released in unlock (not canceled remotely),
+ * instead only a refcount is taken, so that the remote MDT where the object
+ * resides can detect conflict with this lock there.
+ *
+ * \param lut target
+ * \param lock cross-MDT lock to save
+ * \param transno when the transaction with this transno is committed, this lock
+ * can be canceled.
+ */
+void tgt_save_slc_lock(struct lu_target *lut, struct ldlm_lock *lock,
+ __u64 transno)
+{
+ spin_lock(&lut->lut_slc_locks_guard);
+ lock_res_and_lock(lock);
+ if (ldlm_is_cbpending(lock)) {
+ /* if it was canceld by server, don't save, because remote MDT
+ * will do Sync-on-Cancel. */
+ LDLM_LOCK_PUT(lock);
+ } else {
+ lock->l_transno = transno;
+ /* if this lock is in the list already, there are two operations
+ * both use this lock, and save it after use, so for the second
+ * one, just put the refcount. */
+ if (list_empty(&lock->l_slc_link))
+ list_add_tail(&lock->l_slc_link, &lut->lut_slc_locks);
+ else
+ LDLM_LOCK_PUT(lock);
+ }
+ unlock_res_and_lock(lock);
+ spin_unlock(&lut->lut_slc_locks_guard);
+}
+EXPORT_SYMBOL(tgt_save_slc_lock);
+
+/*
+ * Discard cross-MDT lock from lut_slc_locks.
+ *
+ * This is called upon BAST, just remove lock from lut_slc_locks and put lock
+ * refcount. The BAST will cancel this lock.
+ *
+ * \param lut target
+ * \param lock cross-MDT lock to discard
+ */
+void tgt_discard_slc_lock(struct lu_target *lut, struct ldlm_lock *lock)
+{
+ spin_lock(&lut->lut_slc_locks_guard);
+ lock_res_and_lock(lock);
+ /* may race with tgt_cancel_slc_locks() */
+ if (lock->l_transno != 0) {
+ LASSERT(!list_empty(&lock->l_slc_link));
+ LASSERT(ldlm_is_cbpending(lock));
+ list_del_init(&lock->l_slc_link);
+ lock->l_transno = 0;
+ LDLM_LOCK_PUT(lock);
+ }
+ unlock_res_and_lock(lock);
+ spin_unlock(&lut->lut_slc_locks_guard);
+}
+EXPORT_SYMBOL(tgt_discard_slc_lock);
+
+/*
+ * Cancel cross-MDT locks upon transaction commit.
+ *
+ * Remove cross-MDT locks from lut_slc_locks, cancel them and put lock refcount.
+ *
+ * \param lut target
+ * \param transno transaction with this number was committed.
+ */
+void tgt_cancel_slc_locks(struct lu_target *lut, __u64 transno)
+{
+ struct ldlm_lock *lock, *next;
+ LIST_HEAD(list);
+ struct lustre_handle lockh;
+
+ spin_lock(&lut->lut_slc_locks_guard);
+ list_for_each_entry_safe(lock, next, &lut->lut_slc_locks,
+ l_slc_link) {
+ lock_res_and_lock(lock);
+ LASSERT(lock->l_transno != 0);
+ if (lock->l_transno > transno) {
+ unlock_res_and_lock(lock);
+ continue;
+ }
+ /* ouch, another operation is using it after it's saved */
+ if (lock->l_readers != 0 || lock->l_writers != 0) {
+ unlock_res_and_lock(lock);
+ continue;
+ }
+ /* set CBPENDING so that this lock won't be used again */
+ ldlm_set_cbpending(lock);
+ lock->l_transno = 0;
+ list_move(&lock->l_slc_link, &list);
+ unlock_res_and_lock(lock);
+ }
+ spin_unlock(&lut->lut_slc_locks_guard);
+
+ list_for_each_entry_safe(lock, next, &list, l_slc_link) {
+ list_del_init(&lock->l_slc_link);
+ ldlm_lock2handle(lock, &lockh);
+ ldlm_cli_cancel(&lockh, LCF_ASYNC);
+ LDLM_LOCK_PUT(lock);
+ }
+}
+
int tgt_init(const struct lu_env *env, struct lu_target *lut,
struct obd_device *obd, struct dt_device *dt,
struct tgt_opc_slice *slice, int request_fail_id,
struct lu_attr attr;
struct lu_fid fid;
struct dt_object *o;
- int rc = 0;
+ struct tg_grants_data *tgd = &lut->lut_tgd;
+ struct obd_statfs *osfs;
+ int i, rc = 0;
ENTRY;
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;
/* sptlrcp variables init */
rwlock_init(&lut->lut_sptlrpc_lock);
sptlrpc_rule_set_init(&lut->lut_sptlrpc_rset);
- lut->lut_mds_capa = 1;
- lut->lut_oss_capa = 1;
spin_lock_init(&lut->lut_flags_lock);
lut->lut_sync_lock_cancel = NEVER_SYNC_ON_CANCEL;
+ spin_lock_init(&lut->lut_slc_locks_guard);
+ INIT_LIST_HEAD(&lut->lut_slc_locks);
+
/* last_rcvd initialization is needed by replayable targets only */
if (!obd->obd_replayable)
RETURN(0);
+ /* initialize grant and statfs data in target */
+ dt_conf_get(env, lut->lut_bottom, &lut->lut_dt_conf);
+
+ /* statfs data */
+ spin_lock_init(&tgd->tgd_osfs_lock);
+ tgd->tgd_osfs_age = ktime_get_seconds() - 1000;
+ tgd->tgd_osfs_unstable = 0;
+ tgd->tgd_statfs_inflight = 0;
+ tgd->tgd_osfs_inflight = 0;
+
+ /* grant data */
+ spin_lock_init(&tgd->tgd_grant_lock);
+ tgd->tgd_tot_dirty = 0;
+ tgd->tgd_tot_granted = 0;
+ tgd->tgd_tot_pending = 0;
+ tgd->tgd_grant_compat_disable = 0;
+
+ /* populate cached statfs data */
+ osfs = &tgt_th_info(env)->tti_u.osfs;
+ rc = tgt_statfs_internal(env, lut, osfs, 0, NULL);
+ if (rc != 0) {
+ CERROR("%s: can't get statfs data, rc %d\n", tgt_name(lut),
+ rc);
+ GOTO(out, rc);
+ }
+ if (!is_power_of_2(osfs->os_bsize)) {
+ CERROR("%s: blocksize (%d) is not a power of 2\n",
+ tgt_name(lut), osfs->os_bsize);
+ GOTO(out, rc = -EPROTO);
+ }
+ tgd->tgd_blockbits = fls(osfs->os_bsize) - 1;
+
spin_lock_init(&lut->lut_translock);
+ spin_lock_init(&lut->lut_client_bitmap_lock);
OBD_ALLOC(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
if (lut->lut_client_bitmap == NULL)
rc = PTR_ERR(o);
CERROR("%s: cannot open LAST_RCVD: rc = %d\n", tgt_name(lut),
rc);
- GOTO(out_bitmap, rc);
+ GOTO(out_put, rc);
}
lut->lut_last_rcvd = o;
rc = tgt_server_data_init(env, lut);
if (rc < 0)
- GOTO(out_obj, rc);
+ GOTO(out_put, rc);
/* prepare transactions callbacks */
lut->lut_txn_cb.dtc_txn_start = tgt_txn_start_cb;
lut->lut_txn_cb.dtc_txn_stop = tgt_txn_stop_cb;
- lut->lut_txn_cb.dtc_txn_commit = NULL;
lut->lut_txn_cb.dtc_cookie = lut;
lut->lut_txn_cb.dtc_tag = LCT_DT_THREAD | LCT_MD_THREAD;
INIT_LIST_HEAD(&lut->lut_txn_cb.dtc_linkage);
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 = -ENOMEM);
+
+ 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);
+
+ atomic_set(&lut->lut_sync_count, 0);
RETURN(0);
-out_obj:
- 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);
+
+out:
+ dt_txn_callback_del(lut->lut_bottom, &lut->lut_txn_cb);
+out_put:
+ obd->u.obt.obt_magic = 0;
+ obd->u.obt.obt_lut = NULL;
+ if (lut->lut_last_rcvd != NULL) {
+ dt_object_put(env, lut->lut_last_rcvd);
+ lut->lut_last_rcvd = NULL;
+ }
+ 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)
+ dt_object_put(env, lut->lut_reply_data);
+ 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_LARGE(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;
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)
+ dt_object_put(env, lut->lut_reply_data);
+ 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_LARGE(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;
}
if (lut->lut_last_rcvd) {
dt_txn_callback_del(lut->lut_bottom, &lut->lut_txn_cb);
- lu_object_put(env, &lut->lut_last_rcvd->do_lu);
+ dt_object_put(env, lut->lut_last_rcvd);
lut->lut_last_rcvd = NULL;
}
EXIT;
}
EXPORT_SYMBOL(tgt_fini);
+static struct kmem_cache *tgt_thread_kmem;
+static struct kmem_cache *tgt_session_kmem;
+static struct lu_kmem_descr tgt_caches[] = {
+ {
+ .ckd_cache = &tgt_thread_kmem,
+ .ckd_name = "tgt_thread_kmem",
+ .ckd_size = sizeof(struct tgt_thread_info),
+ },
+ {
+ .ckd_cache = &tgt_session_kmem,
+ .ckd_name = "tgt_session_kmem",
+ .ckd_size = sizeof(struct tgt_session_info)
+ },
+ {
+ .ckd_cache = NULL
+ }
+};
+
+
/* context key constructor/destructor: tg_key_init, tg_key_fini */
-LU_KEY_INIT(tgt, struct tgt_thread_info);
+static void *tgt_key_init(const struct lu_context *ctx,
+ struct lu_context_key *key)
+{
+ struct tgt_thread_info *thread;
+
+ OBD_SLAB_ALLOC_PTR_GFP(thread, tgt_thread_kmem, GFP_NOFS);
+ if (thread == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ return thread;
+}
static void tgt_key_fini(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
if (args->ta_args != NULL)
OBD_FREE(args->ta_args, sizeof(args->ta_args[0]) *
args->ta_alloc_args);
- OBD_FREE_PTR(info);
+ OBD_SLAB_FREE_PTR(info, tgt_thread_kmem);
}
static void tgt_key_exit(const struct lu_context *ctx,
.lct_fini = tgt_key_fini,
.lct_exit = tgt_key_exit,
};
-EXPORT_SYMBOL(tgt_thread_key);
LU_KEY_INIT_GENERIC(tgt);
-/* context key constructor/destructor: tgt_ses_key_init, tgt_ses_key_fini */
-LU_KEY_INIT_FINI(tgt_ses, struct tgt_session_info);
+static void *tgt_ses_key_init(const struct lu_context *ctx,
+ struct lu_context_key *key)
+{
+ struct tgt_session_info *session;
+
+ OBD_SLAB_ALLOC_PTR_GFP(session, tgt_session_kmem, GFP_NOFS);
+ if (session == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ return session;
+}
+
+static void tgt_ses_key_fini(const struct lu_context *ctx,
+ struct lu_context_key *key, void *data)
+{
+ struct tgt_session_info *session = data;
+
+ OBD_SLAB_FREE_PTR(session, tgt_session_kmem);
+}
/* context key: tgt_session_key */
struct lu_context_key tgt_session_key = {
int tgt_mod_init(void)
{
+ int result;
ENTRY;
- tgt_page_to_corrupt = alloc_page(GFP_IOFS);
+ result = lu_kmem_init(tgt_caches);
+ if (result != 0)
+ RETURN(result);
+
+ tgt_page_to_corrupt = alloc_page(GFP_KERNEL);
tgt_key_init_generic(&tgt_thread_key, NULL);
lu_context_key_register_many(&tgt_thread_key, NULL);
tgt_ses_key_init_generic(&tgt_session_key, NULL);
lu_context_key_register_many(&tgt_session_key, NULL);
+ barrier_init();
+
+ update_info_init();
RETURN(0);
}
void tgt_mod_exit(void)
{
+ barrier_fini();
if (tgt_page_to_corrupt != NULL)
- page_cache_release(tgt_page_to_corrupt);
+ put_page(tgt_page_to_corrupt);
lu_context_key_degister(&tgt_thread_key);
lu_context_key_degister(&tgt_session_key);
+ update_info_fini();
+
+ lu_kmem_fini(tgt_caches);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff