*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2015, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/fld/fld_request.c
*
#include <libcfs/libcfs.h>
#include <linux/module.h>
#include <linux/math64.h>
+#include <linux/delay.h>
#include <obd.h>
#include <obd_class.h>
static struct lu_fld_target *
fld_rrb_scan(struct lu_client_fld *fld, u64 seq)
{
- struct lu_fld_target *target;
- int hash;
- ENTRY;
+ struct lu_fld_target *target;
+ int hash;
+
+ ENTRY;
- /* Because almost all of special sequence located in MDT0,
+ /*
+ * Because almost all of special sequence located in MDT0,
* it should go to index 0 directly, instead of calculating
* hash again, and also if other MDTs is not being connected,
* the fld lookup requests(for seq on MDT0) should not be
- * blocked because of other MDTs */
+ * blocked because of other MDTs
+ */
if (fid_seq_is_norm(seq))
hash = fld_rrb_hash(fld, seq);
else
again:
list_for_each_entry(target, &fld->lcf_targets, ft_chain) {
- if (target->ft_idx == hash)
- RETURN(target);
- }
+ if (target->ft_idx == hash)
+ RETURN(target);
+ }
if (hash != 0) {
- /* It is possible the remote target(MDT) are not connected to
+ /*
+ * It is possible the remote target(MDT) are not connected to
* with client yet, so we will refer this to MDT0, which should
- * be connected during mount */
+ * be connected during mount
+ */
hash = 0;
goto again;
}
- CERROR("%s: Can't find target by hash %d (seq %#llx). "
- "Targets (%d):\n", fld->lcf_name, hash, seq,
- fld->lcf_count);
+ CERROR("%s: Can't find target by hash %d (seq %#llx). Targets (%d):\n",
+ fld->lcf_name, hash, seq, fld->lcf_count);
list_for_each_entry(target, &fld->lcf_targets, ft_chain) {
- const char *srv_name = target->ft_srv != NULL ?
- target->ft_srv->lsf_name : "<null>";
- const char *exp_name = target->ft_exp != NULL ?
- (char *)target->ft_exp->exp_obd->obd_uuid.uuid :
- "<null>";
+ const char *srv_name = target->ft_srv != NULL ?
+ target->ft_srv->lsf_name : "<null>";
+ const char *exp_name = target->ft_exp != NULL ?
+ (char *)target->ft_exp->exp_obd->obd_uuid.uuid :
+ "<null>";
CERROR(" exp: 0x%p (%s), srv: 0x%p (%s), idx: %llu\n",
- target->ft_exp, exp_name, target->ft_srv,
- srv_name, target->ft_idx);
- }
-
- /*
- * If target is not found, there is logical error anyway, so here is
- * LBUG() to catch this situation.
- */
- LBUG();
- RETURN(NULL);
+ target->ft_exp, exp_name, target->ft_srv,
+ srv_name, target->ft_idx);
+ }
+
+ /*
+ * If target is not found, there is logical error anyway, so here is
+ * LBUG() to catch this situation.
+ */
+ LBUG();
+ RETURN(NULL);
}
struct lu_fld_hash fld_hash[] = {
- {
- .fh_name = "RRB",
- .fh_hash_func = fld_rrb_hash,
- .fh_scan_func = fld_rrb_scan
- },
- {
+ {
+ .fh_name = "RRB",
+ .fh_hash_func = fld_rrb_hash,
+ .fh_scan_func = fld_rrb_scan
+ },
+ {
NULL,
- }
+ }
};
static struct lu_fld_target *
fld_client_get_target(struct lu_client_fld *fld, u64 seq)
{
struct lu_fld_target *target;
+
ENTRY;
LASSERT(fld->lcf_hash != NULL);
target = fld->lcf_hash->fh_scan_func(fld, seq);
spin_unlock(&fld->lcf_lock);
- if (target != NULL) {
- CDEBUG(D_INFO, "%s: Found target (idx %llu"
- ") by seq %#llx\n", fld->lcf_name,
- target->ft_idx, seq);
- }
+ if (target) {
+ CDEBUG(D_INFO, "%s: Found target (idx %llu) by seq %#llx\n",
+ fld->lcf_name, target->ft_idx, seq);
+ }
- RETURN(target);
+ RETURN(target);
}
/*
* of FLD module.
*/
int fld_client_add_target(struct lu_client_fld *fld,
- struct lu_fld_target *tar)
+ struct lu_fld_target *tar)
{
const char *name;
- struct lu_fld_target *target, *tmp;
- ENTRY;
+ struct lu_fld_target *target, *tmp;
+
+ ENTRY;
- LASSERT(tar != NULL);
+ LASSERT(tar != NULL);
name = fld_target_name(tar);
- LASSERT(name != NULL);
- LASSERT(tar->ft_srv != NULL || tar->ft_exp != NULL);
+ LASSERT(name != NULL);
+ LASSERT(tar->ft_srv != NULL || tar->ft_exp != NULL);
CDEBUG(D_INFO, "%s: Adding target %s (idx %llu)\n", fld->lcf_name,
name, tar->ft_idx);
- OBD_ALLOC_PTR(target);
- if (target == NULL)
- RETURN(-ENOMEM);
+ OBD_ALLOC_PTR(target);
+ if (!target)
+ RETURN(-ENOMEM);
spin_lock(&fld->lcf_lock);
list_for_each_entry(tmp, &fld->lcf_targets, ft_chain) {
if (tmp->ft_idx == tar->ft_idx) {
spin_unlock(&fld->lcf_lock);
- OBD_FREE_PTR(target);
+ OBD_FREE_PTR(target);
CERROR("Target %s exists in FLD and known as %s:#%llu\n",
- name, fld_target_name(tmp), tmp->ft_idx);
- RETURN(-EEXIST);
- }
- }
+ name, fld_target_name(tmp), tmp->ft_idx);
+ RETURN(-EEXIST);
+ }
+ }
- target->ft_exp = tar->ft_exp;
- if (target->ft_exp != NULL)
- class_export_get(target->ft_exp);
- target->ft_srv = tar->ft_srv;
- target->ft_idx = tar->ft_idx;
+ target->ft_exp = tar->ft_exp;
+ if (target->ft_exp)
+ class_export_get(target->ft_exp);
+ target->ft_srv = tar->ft_srv;
+ target->ft_idx = tar->ft_idx;
list_add_tail(&target->ft_chain, &fld->lcf_targets);
- fld->lcf_count++;
+ fld->lcf_count++;
spin_unlock(&fld->lcf_lock);
RETURN(0);
EXPORT_SYMBOL(fld_client_add_target);
/* Remove export from FLD */
-int fld_client_del_target(struct lu_client_fld *fld, __u64 idx)
+int fld_client_del_target(struct lu_client_fld *fld, u64 idx)
{
struct lu_fld_target *target, *tmp;
+
ENTRY;
spin_lock(&fld->lcf_lock);
list_del(&target->ft_chain);
spin_unlock(&fld->lcf_lock);
- if (target->ft_exp != NULL)
- class_export_put(target->ft_exp);
+ if (target->ft_exp)
+ class_export_put(target->ft_exp);
- OBD_FREE_PTR(target);
- RETURN(0);
- }
- }
+ OBD_FREE_PTR(target);
+ RETURN(0);
+ }
+ }
spin_unlock(&fld->lcf_lock);
RETURN(-ENOENT);
}
-#ifdef CONFIG_PROC_FS
-static int fld_client_proc_init(struct lu_client_fld *fld)
-{
- int rc;
- ENTRY;
-
- fld->lcf_proc_dir = lprocfs_register(fld->lcf_name, fld_type_proc_dir,
- NULL, NULL);
- if (IS_ERR(fld->lcf_proc_dir)) {
- CERROR("%s: LProcFS failed in fld-init\n",
- fld->lcf_name);
- rc = PTR_ERR(fld->lcf_proc_dir);
- RETURN(rc);
- }
-
- rc = lprocfs_add_vars(fld->lcf_proc_dir, fld_client_proc_list, fld);
- if (rc) {
- CERROR("%s: Can't init FLD proc, rc %d\n",
- fld->lcf_name, rc);
- GOTO(out_cleanup, rc);
- }
+struct dentry *fld_debugfs_dir;
- RETURN(0);
-
-out_cleanup:
- fld_client_proc_fini(fld);
- return rc;
-}
-
-void fld_client_proc_fini(struct lu_client_fld *fld)
-{
- ENTRY;
- if (fld->lcf_proc_dir) {
- if (!IS_ERR(fld->lcf_proc_dir))
- lprocfs_remove(&fld->lcf_proc_dir);
- fld->lcf_proc_dir = NULL;
- }
- EXIT;
-}
-#else /* !CONFIG_PROC_FS */
-static int fld_client_proc_init(struct lu_client_fld *fld)
+static void fld_client_debugfs_init(struct lu_client_fld *fld)
{
- return 0;
+ ENTRY;
+ fld->lcf_debugfs_entry = debugfs_create_dir(fld->lcf_name,
+ fld_debugfs_dir);
+ ldebugfs_add_vars(fld->lcf_debugfs_entry,
+ fld_client_debugfs_list,
+ fld);
}
-void fld_client_proc_fini(struct lu_client_fld *fld)
+void fld_client_debugfs_fini(struct lu_client_fld *fld)
{
- return;
+ debugfs_remove_recursive(fld->lcf_debugfs_entry);
}
-#endif /* CONFIG_PROC_FS */
-
-EXPORT_SYMBOL(fld_client_proc_fini);
+EXPORT_SYMBOL(fld_client_debugfs_fini);
static inline int hash_is_sane(int hash)
{
- return (hash >= 0 && hash < ARRAY_SIZE(fld_hash));
+ return (hash >= 0 && hash < ARRAY_SIZE(fld_hash));
}
int fld_client_init(struct lu_client_fld *fld,
- const char *prefix, int hash)
+ const char *prefix, int hash)
{
- int cache_size, cache_threshold;
- int rc;
- ENTRY;
-
- LASSERT(fld != NULL);
+ int cache_size, cache_threshold;
+ int rc = 0;
- snprintf(fld->lcf_name, sizeof(fld->lcf_name),
- "cli-%s", prefix);
+ ENTRY;
+ snprintf(fld->lcf_name, sizeof(fld->lcf_name),
+ "cli-%s", prefix);
- if (!hash_is_sane(hash)) {
- CERROR("%s: Wrong hash function %#x\n",
- fld->lcf_name, hash);
- RETURN(-EINVAL);
- }
+ if (!hash_is_sane(hash)) {
+ CERROR("%s: Wrong hash function %#x\n",
+ fld->lcf_name, hash);
+ RETURN(-EINVAL);
+ }
fld->lcf_count = 0;
spin_lock_init(&fld->lcf_lock);
fld->lcf_hash = &fld_hash[hash];
INIT_LIST_HEAD(&fld->lcf_targets);
- cache_size = FLD_CLIENT_CACHE_SIZE /
- sizeof(struct fld_cache_entry);
+ cache_size = FLD_CLIENT_CACHE_SIZE /
+ sizeof(struct fld_cache_entry);
- cache_threshold = cache_size *
- FLD_CLIENT_CACHE_THRESHOLD / 100;
+ cache_threshold = cache_size *
+ FLD_CLIENT_CACHE_THRESHOLD / 100;
- fld->lcf_cache = fld_cache_init(fld->lcf_name,
- cache_size, cache_threshold);
- if (IS_ERR(fld->lcf_cache)) {
- rc = PTR_ERR(fld->lcf_cache);
- fld->lcf_cache = NULL;
- GOTO(out, rc);
- }
+ fld->lcf_cache = fld_cache_init(fld->lcf_name,
+ cache_size, cache_threshold);
+ if (IS_ERR(fld->lcf_cache)) {
+ rc = PTR_ERR(fld->lcf_cache);
+ fld->lcf_cache = NULL;
+ GOTO(out, rc);
+ }
- rc = fld_client_proc_init(fld);
- if (rc)
- GOTO(out, rc);
- EXIT;
+ fld_client_debugfs_init(fld);
+ EXIT;
out:
- if (rc)
- fld_client_fini(fld);
- else
- CDEBUG(D_INFO, "%s: Using \"%s\" hash\n",
- fld->lcf_name, fld->lcf_hash->fh_name);
- return rc;
+ if (rc)
+ fld_client_fini(fld);
+ else
+ CDEBUG(D_INFO, "%s: Using \"%s\" hash\n",
+ fld->lcf_name, fld->lcf_hash->fh_name);
+ return rc;
}
EXPORT_SYMBOL(fld_client_init);
void fld_client_fini(struct lu_client_fld *fld)
{
struct lu_fld_target *target, *tmp;
+
ENTRY;
spin_lock(&fld->lcf_lock);
list_for_each_entry_safe(target, tmp, &fld->lcf_targets, ft_chain) {
- fld->lcf_count--;
+ fld->lcf_count--;
list_del(&target->ft_chain);
- if (target->ft_exp != NULL)
- class_export_put(target->ft_exp);
- OBD_FREE_PTR(target);
- }
+ if (target->ft_exp)
+ class_export_put(target->ft_exp);
+ OBD_FREE_PTR(target);
+ }
spin_unlock(&fld->lcf_lock);
- if (fld->lcf_cache != NULL) {
- if (!IS_ERR(fld->lcf_cache))
- fld_cache_fini(fld->lcf_cache);
- fld->lcf_cache = NULL;
- }
+ if (fld->lcf_cache) {
+ if (!IS_ERR(fld->lcf_cache))
+ fld_cache_fini(fld->lcf_cache);
+ fld->lcf_cache = NULL;
+ }
- EXIT;
+ EXIT;
}
EXPORT_SYMBOL(fld_client_fini);
int fld_client_rpc(struct obd_export *exp,
- struct lu_seq_range *range, __u32 fld_op,
+ struct lu_seq_range *range, u32 fld_op,
struct ptlrpc_request **reqp)
{
struct ptlrpc_request *req = NULL;
- struct lu_seq_range *prange;
- __u32 *op;
- int rc = 0;
- struct obd_import *imp;
+ struct lu_seq_range *prange;
+ u32 *op;
+ int rc = 0;
+ struct obd_import *imp;
+
ENTRY;
LASSERT(exp != NULL);
-again:
imp = class_exp2cliimp(exp);
+again:
switch (fld_op) {
case FLD_QUERY:
req = ptlrpc_request_alloc_pack(imp, &RQF_FLD_QUERY,
LUSTRE_MDS_VERSION, FLD_QUERY);
- if (req == NULL)
+ if (!req)
RETURN(-ENOMEM);
- /* XXX: only needed when talking to old server(< 2.6), it should
- * be removed when < 2.6 server is not supported */
+ /*
+ * XXX: only needed when talking to old server(< 2.6), it should
+ * be removed when < 2.6 server is not supported
+ */
op = req_capsule_client_get(&req->rq_pill, &RMF_FLD_OPC);
*op = FLD_LOOKUP;
- /* For MDS_MDS seq lookup, it will always use LWP connection,
+ /*
+ * For MDS_MDS seq lookup, it will always use LWP connection,
* but LWP will be evicted after restart, so cause the error.
* so we will set no_delay for seq lookup request, once the
- * request fails because of the eviction. always retry here */
+ * request fails because of the eviction. always retry here
+ */
if (imp->imp_connect_flags_orig & OBD_CONNECT_MDS_MDS) {
req->rq_allow_replay = 1;
req->rq_no_delay = 1;
case FLD_READ:
req = ptlrpc_request_alloc_pack(imp, &RQF_FLD_READ,
LUSTRE_MDS_VERSION, FLD_READ);
- if (req == NULL)
+ if (!req)
RETURN(-ENOMEM);
req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA,
prange = req_capsule_client_get(&req->rq_pill, &RMF_FLD_MDFLD);
*prange = *range;
ptlrpc_request_set_replen(req);
- req->rq_request_portal = FLD_REQUEST_PORTAL;
+ req->rq_request_portal = FLD_REQUEST_PORTAL;
req->rq_reply_portal = MDC_REPLY_PORTAL;
- ptlrpc_at_set_req_timeout(req);
-
- obd_get_request_slot(&exp->exp_obd->u.cli);
- rc = ptlrpc_queue_wait(req);
- obd_put_request_slot(&exp->exp_obd->u.cli);
+ ptlrpc_at_set_req_timeout(req);
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_FLD_QUERY_REQ) && req->rq_no_delay) {
+ /* the same error returned by ptlrpc_import_delay_req */
+ rc = -EAGAIN;
+ req->rq_status = rc;
+ } else {
+ rc = ptlrpc_queue_wait(req);
+ }
if (rc == -ENOENT) {
/* Don't loop forever on non-existing FID sequences. */
if (imp->imp_state != LUSTRE_IMP_CLOSED &&
!imp->imp_deactive &&
imp->imp_connect_flags_orig & OBD_CONNECT_MDS_MDS &&
+ OCD_HAS_FLAG(&imp->imp_connect_data, LIGHTWEIGHT) &&
rc != -ENOTSUPP) {
- /* Since LWP is not replayable, so it will keep
- * trying unless umount happens or the remote
- * target does not support the operation, otherwise
- * it would cause unecessary failure of the
- * application. */
+ /* LWP is not replayable, retry after a while */
+ rc = -EAGAIN;
+ }
+ if (rc == -EAGAIN) {
ptlrpc_req_finished(req);
+ if (msleep_interruptible(2 * MSEC_PER_SEC))
+ GOTO(out_req, rc = -EINTR);
rc = 0;
goto again;
}
if (fld_op == FLD_QUERY) {
prange = req_capsule_server_get(&req->rq_pill,
&RMF_FLD_MDFLD);
- if (prange == NULL)
+ if (!prange)
GOTO(out_req, rc = -EFAULT);
*range = *prange;
}
EXIT;
out_req:
- if (rc != 0 || reqp == NULL) {
+ if (rc != 0 || !reqp) {
ptlrpc_req_finished(req);
req = NULL;
}
- if (reqp != NULL)
+ if (reqp)
*reqp = req;
return rc;
}
int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds,
- __u32 flags, const struct lu_env *env)
+ u32 flags, const struct lu_env *env)
{
struct lu_seq_range res = { 0 };
struct lu_fld_target *target;
struct lu_fld_target *origin;
int rc;
+
ENTRY;
rc = fld_cache_lookup(fld->lcf_cache, seq, &res);
RETURN(0);
}
- /* Can not find it in the cache */
- target = fld_client_get_target(fld, seq);
- LASSERT(target != NULL);
+ /* Can not find it in the cache */
+ target = fld_client_get_target(fld, seq);
+ LASSERT(target != NULL);
origin = target;
again:
- CDEBUG(D_INFO, "%s: Lookup fld entry (seq: %#llx) on "
- "target %s (idx %llu)\n", fld->lcf_name, seq,
- fld_target_name(target), target->ft_idx);
+ CDEBUG(D_INFO, "%s: Lookup fld entry (seq: %#llx) on target %s (idx %llu)\n",
+ fld->lcf_name, seq, fld_target_name(target), target->ft_idx);
res.lsr_start = seq;
fld_range_set_type(&res, flags);
#ifdef HAVE_SERVER_SUPPORT
- if (target->ft_srv != NULL) {
+ if (target->ft_srv) {
LASSERT(env != NULL);
rc = fld_server_lookup(env, target->ft_srv, seq, &res);
} else
}
if (rc == -ESHUTDOWN) {
- /* If fld lookup failed because the target has been shutdown,
+ /*
+ * If fld lookup failed because the target has been shutdown,
* then try next target in the list, until trying all targets
- * or fld lookup succeeds */
+ * or fld lookup succeeds
+ */
spin_lock(&fld->lcf_lock);
-
- /* If the next entry in the list is the head of the list,
+ /*
+ * If the next entry in the list is the head of the list,
* move to the next entry after the head and retrieve
- * the target. Else retreive the next target entry. */
-
+ * the target. Else retreive the next target entry.
+ */
if (target->ft_chain.next == &fld->lcf_targets)
target = list_entry(target->ft_chain.next->next,
struct lu_fld_target, ft_chain);
void fld_client_flush(struct lu_client_fld *fld)
{
- fld_cache_flush(fld->lcf_cache);
+ fld_cache_flush(fld->lcf_cache);
}
-
-struct proc_dir_entry *fld_type_proc_dir;
-
static int __init fld_init(void)
{
- fld_type_proc_dir = lprocfs_register(LUSTRE_FLD_NAME,
- proc_lustre_root,
- NULL, NULL);
- if (IS_ERR(fld_type_proc_dir))
- return PTR_ERR(fld_type_proc_dir);
-
#ifdef HAVE_SERVER_SUPPORT
- fld_server_mod_init();
+ int rc;
+
+ rc = fld_server_mod_init();
+ if (rc)
+ return rc;
#endif /* HAVE_SERVER_SUPPORT */
- return 0;
+ fld_debugfs_dir = debugfs_create_dir(LUSTRE_FLD_NAME,
+ debugfs_lustre_root);
+ return PTR_ERR_OR_ZERO(fld_debugfs_dir);
}
static void __exit fld_exit(void)
fld_server_mod_exit();
#endif /* HAVE_SERVER_SUPPORT */
- if (fld_type_proc_dir != NULL && !IS_ERR(fld_type_proc_dir)) {
- lprocfs_remove(&fld_type_proc_dir);
- fld_type_proc_dir = NULL;
- }
+ debugfs_remove_recursive(fld_debugfs_dir);
}
MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
git://git.whamcloud.com / fs / lustre-release.git / blobdiff