/*
* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
*
- * Copyright (c) 2012, Whamcloud, Inc.
+ * Copyright (c) 2012, 2013, Intel Corporation.
*
* Code originally extracted from quota directory
*/
-#ifndef __KERNEL__
-# include <liblustre.h>
-#endif
-#include <obd_ost.h>
+#include <obd.h>
#include "osc_internal.h"
-struct osc_quota_info {
- cfs_list_t oqi_hash; /* hash list */
- struct client_obd *oqi_cli; /* osc obd */
- unsigned int oqi_id; /* uid/gid of a file */
- short oqi_type; /* quota type */
-};
-
-cfs_spinlock_t qinfo_list_lock = CFS_SPIN_LOCK_UNLOCKED;
-
-static cfs_list_t qinfo_hash[NR_DQHASH];
-/* SLAB cache for client quota context */
-cfs_mem_cache_t *qinfo_cachep = NULL;
-
-static inline int hashfn(struct client_obd *cli, unsigned long id, int type)
- __attribute__((__const__));
-
-static inline int hashfn(struct client_obd *cli, unsigned long id, int type)
+static inline struct osc_quota_info *osc_oqi_alloc(obd_uid id)
{
- unsigned long tmp = ((unsigned long)cli>>6) ^ id;
- tmp = (tmp * (MAXQUOTAS - type)) % NR_DQHASH;
- return tmp;
-}
+ struct osc_quota_info *oqi;
-/* caller must hold qinfo_list_lock */
-static inline void insert_qinfo_hash(struct osc_quota_info *oqi)
-{
- cfs_list_t *head = qinfo_hash +
- hashfn(oqi->oqi_cli, oqi->oqi_id, oqi->oqi_type);
+ OBD_SLAB_ALLOC_PTR(oqi, osc_quota_kmem);
+ if (oqi != NULL)
+ oqi->oqi_id = id;
- LASSERT_SPIN_LOCKED(&qinfo_list_lock);
- cfs_list_add(&oqi->oqi_hash, head);
+ return oqi;
}
-/* caller must hold qinfo_list_lock */
-static inline void remove_qinfo_hash(struct osc_quota_info *oqi)
+int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[])
{
- LASSERT_SPIN_LOCKED(&qinfo_list_lock);
- cfs_list_del_init(&oqi->oqi_hash);
+ int type;
+ ENTRY;
+
+ for (type = 0; type < MAXQUOTAS; type++) {
+ struct osc_quota_info *oqi;
+
+ oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
+ if (oqi) {
+ /* do not try to access oqi here, it could have been
+ * freed by osc_quota_setdq() */
+
+ /* the slot is busy, the user is about to run out of
+ * quota space on this OST */
+ CDEBUG(D_QUOTA, "chkdq found noquota for %s %d\n",
+ type == USRQUOTA ? "user" : "grout", qid[type]);
+ RETURN(NO_QUOTA);
+ }
+ }
+
+ RETURN(QUOTA_OK);
}
-/* caller must hold qinfo_list_lock */
-static inline struct osc_quota_info *find_qinfo(struct client_obd *cli,
- unsigned int id, int type)
+#define MD_QUOTA_FLAG(type) ((type == USRQUOTA) ? OBD_MD_FLUSRQUOTA \
+ : OBD_MD_FLGRPQUOTA)
+#define FL_QUOTA_FLAG(type) ((type == USRQUOTA) ? OBD_FL_NO_USRQUOTA \
+ : OBD_FL_NO_GRPQUOTA)
+
+int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
+ obd_flag valid, obd_flag flags)
{
- struct osc_quota_info *oqi;
- unsigned int hashent = hashfn(cli, id, type);
+ int type;
+ int rc = 0;
ENTRY;
- LASSERT_SPIN_LOCKED(&qinfo_list_lock);
- cfs_list_for_each_entry(oqi, &qinfo_hash[hashent], oqi_hash) {
- if (oqi->oqi_cli == cli &&
- oqi->oqi_id == id && oqi->oqi_type == type)
- RETURN(oqi);
- }
- RETURN(NULL);
+ if ((valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) == 0)
+ RETURN(0);
+
+ for (type = 0; type < MAXQUOTAS; type++) {
+ struct osc_quota_info *oqi;
+
+ if ((valid & MD_QUOTA_FLAG(type)) == 0)
+ continue;
+
+ /* lookup the ID in the per-type hash table */
+ oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
+ if ((flags & FL_QUOTA_FLAG(type)) != 0) {
+ /* This ID is getting close to its quota limit, let's
+ * switch to sync I/O */
+ if (oqi != NULL)
+ continue;
+
+ oqi = osc_oqi_alloc(qid[type]);
+ if (oqi == NULL) {
+ rc = -ENOMEM;
+ break;
+ }
+
+ rc = cfs_hash_add_unique(cli->cl_quota_hash[type],
+ &qid[type], &oqi->oqi_hash);
+ /* race with others? */
+ if (rc == -EALREADY) {
+ rc = 0;
+ OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
+ }
+
+ CDEBUG(D_QUOTA, "%s: setdq to insert for %s %d (%d)\n",
+ cli->cl_import->imp_obd->obd_name,
+ type == USRQUOTA ? "user" : "group",
+ qid[type], rc);
+ } else {
+ /* This ID is now off the hook, let's remove it from
+ * the hash table */
+ if (oqi == NULL)
+ continue;
+
+ oqi = cfs_hash_del_key(cli->cl_quota_hash[type],
+ &qid[type]);
+ if (oqi)
+ OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
+
+ CDEBUG(D_QUOTA, "%s: setdq to remove for %s %d (%p)\n",
+ cli->cl_import->imp_obd->obd_name,
+ type == USRQUOTA ? "user" : "group",
+ qid[type], oqi);
+ }
+ }
+
+ RETURN(rc);
}
-static struct osc_quota_info *alloc_qinfo(struct client_obd *cli,
- unsigned int id, int type)
+/*
+ * Hash operations for uid/gid <-> osc_quota_info
+ */
+static unsigned
+oqi_hashfn(cfs_hash_t *hs, const void *key, unsigned mask)
{
- struct osc_quota_info *oqi;
- ENTRY;
+ return cfs_hash_u32_hash(*((__u32*)key), mask);
+}
- OBD_SLAB_ALLOC_PTR(oqi, qinfo_cachep);
- if(!oqi)
- RETURN(NULL);
+static int
+oqi_keycmp(const void *key, struct hlist_node *hnode)
+{
+ struct osc_quota_info *oqi;
+ obd_uid uid;
- CFS_INIT_LIST_HEAD(&oqi->oqi_hash);
- oqi->oqi_cli = cli;
- oqi->oqi_id = id;
- oqi->oqi_type = type;
+ LASSERT(key != NULL);
+ uid = *((obd_uid*)key);
+ oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
- RETURN(oqi);
+ return uid == oqi->oqi_id;
}
-static void free_qinfo(struct osc_quota_info *oqi)
+static void *
+oqi_key(struct hlist_node *hnode)
{
- OBD_SLAB_FREE(oqi, qinfo_cachep, sizeof(*oqi));
+ struct osc_quota_info *oqi;
+ oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
+ return &oqi->oqi_id;
}
-int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[])
+static void *
+oqi_object(struct hlist_node *hnode)
{
- unsigned int id;
- int cnt, rc = QUOTA_OK;
- ENTRY;
-
- cfs_spin_lock(&qinfo_list_lock);
- for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
- struct osc_quota_info *oqi = NULL;
-
- id = (cnt == USRQUOTA) ? qid[USRQUOTA] : qid[GRPQUOTA];
- oqi = find_qinfo(cli, id, cnt);
- if (oqi) {
- rc = NO_QUOTA;
- break;
- }
- }
- cfs_spin_unlock(&qinfo_list_lock);
-
- if (rc == NO_QUOTA)
- CDEBUG(D_QUOTA, "chkdq found noquota for %s %d\n",
- cnt == USRQUOTA ? "user" : "group", id);
- RETURN(rc);
+ return hlist_entry(hnode, struct osc_quota_info, oqi_hash);
}
-int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
- obd_flag valid, obd_flag flags)
+static void
+oqi_get(cfs_hash_t *hs, struct hlist_node *hnode)
{
- unsigned int id;
- obd_flag noquota;
- int cnt, rc = 0;
- ENTRY;
-
- for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
- struct osc_quota_info *oqi = NULL, *old;
-
- if (!(valid & ((cnt == USRQUOTA) ?
- OBD_MD_FLUSRQUOTA : OBD_MD_FLGRPQUOTA)))
- continue;
-
- id = (cnt == USRQUOTA) ? qid[USRQUOTA] : qid[GRPQUOTA];
- noquota = (cnt == USRQUOTA) ?
- (flags & OBD_FL_NO_USRQUOTA) : (flags & OBD_FL_NO_GRPQUOTA);
-
- if (noquota) {
- oqi = alloc_qinfo(cli, id, cnt);
- if (!oqi) {
- rc = -ENOMEM;
- CDEBUG(D_QUOTA, "setdq for %s %d failed, "
- "(rc = %d)\n",
- cnt == USRQUOTA ? "user" : "group",
- id, rc);
- break;
- }
- }
-
- cfs_spin_lock(&qinfo_list_lock);
- old = find_qinfo(cli, id, cnt);
- if (old && !noquota)
- remove_qinfo_hash(old);
- else if (!old && noquota)
- insert_qinfo_hash(oqi);
- cfs_spin_unlock(&qinfo_list_lock);
-
- if (old && !noquota)
- CDEBUG(D_QUOTA, "setdq to remove for %s %d\n",
- cnt == USRQUOTA ? "user" : "group", id);
- else if (!old && noquota)
- CDEBUG(D_QUOTA, "setdq to insert for %s %d\n",
- cnt == USRQUOTA ? "user" : "group", id);
-
- if (old) {
- if (noquota)
- free_qinfo(oqi);
- else
- free_qinfo(old);
- }
- }
- RETURN(rc);
}
-int osc_quota_cleanup(struct obd_device *obd)
+static void
+oqi_put_locked(cfs_hash_t *hs, struct hlist_node *hnode)
{
- struct client_obd *cli = &obd->u.cli;
- struct osc_quota_info *oqi, *n;
- int i;
- ENTRY;
-
- cfs_spin_lock(&qinfo_list_lock);
- for (i = 0; i < NR_DQHASH; i++) {
- cfs_list_for_each_entry_safe(oqi, n, &qinfo_hash[i], oqi_hash) {
- if (oqi->oqi_cli != cli)
- continue;
- remove_qinfo_hash(oqi);
- free_qinfo(oqi);
- }
- }
- cfs_spin_unlock(&qinfo_list_lock);
-
- RETURN(0);
}
-int osc_quota_init()
+static void
+oqi_exit(cfs_hash_t *hs, struct hlist_node *hnode)
{
- int i;
- ENTRY;
-
- LASSERT(qinfo_cachep == NULL);
- qinfo_cachep = cfs_mem_cache_create("osc_quota_info",
- sizeof(struct osc_quota_info),
- 0, 0);
- if (!qinfo_cachep)
- RETURN(-ENOMEM);
+ struct osc_quota_info *oqi;
- for (i = 0; i < NR_DQHASH; i++)
- CFS_INIT_LIST_HEAD(qinfo_hash + i);
+ oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
- RETURN(0);
+ OBD_SLAB_FREE_PTR(oqi, osc_quota_kmem);
}
-int osc_quota_exit()
+#define HASH_QUOTA_BKT_BITS 5
+#define HASH_QUOTA_CUR_BITS 5
+#define HASH_QUOTA_MAX_BITS 15
+
+static cfs_hash_ops_t quota_hash_ops = {
+ .hs_hash = oqi_hashfn,
+ .hs_keycmp = oqi_keycmp,
+ .hs_key = oqi_key,
+ .hs_object = oqi_object,
+ .hs_get = oqi_get,
+ .hs_put_locked = oqi_put_locked,
+ .hs_exit = oqi_exit,
+};
+
+int osc_quota_setup(struct obd_device *obd)
{
- struct osc_quota_info *oqi, *n;
- int i, rc;
- ENTRY;
+ struct client_obd *cli = &obd->u.cli;
+ int i, type;
+ ENTRY;
+
+ for (type = 0; type < MAXQUOTAS; type++) {
+ cli->cl_quota_hash[type] = cfs_hash_create("QUOTA_HASH",
+ HASH_QUOTA_CUR_BITS,
+ HASH_QUOTA_MAX_BITS,
+ HASH_QUOTA_BKT_BITS,
+ 0,
+ CFS_HASH_MIN_THETA,
+ CFS_HASH_MAX_THETA,
+ "a_hash_ops,
+ CFS_HASH_DEFAULT);
+ if (cli->cl_quota_hash[type] == NULL)
+ break;
+ }
+
+ if (type == MAXQUOTAS)
+ RETURN(0);
+
+ for (i = 0; i < type; i++)
+ cfs_hash_putref(cli->cl_quota_hash[i]);
+
+ RETURN(-ENOMEM);
+}
- cfs_spin_lock(&qinfo_list_lock);
- for (i = 0; i < NR_DQHASH; i++) {
- cfs_list_for_each_entry_safe(oqi, n, &qinfo_hash[i], oqi_hash) {
- remove_qinfo_hash(oqi);
- free_qinfo(oqi);
- }
- }
- cfs_spin_unlock(&qinfo_list_lock);
+int osc_quota_cleanup(struct obd_device *obd)
+{
+ struct client_obd *cli = &obd->u.cli;
+ int type;
+ ENTRY;
- rc = cfs_mem_cache_destroy(qinfo_cachep);
- LASSERTF(rc == 0, "couldn't destory qinfo_cachep slab\n");
- qinfo_cachep = NULL;
+ for (type = 0; type < MAXQUOTAS; type++)
+ cfs_hash_putref(cli->cl_quota_hash[type]);
- RETURN(0);
+ RETURN(0);
}
int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
rc = -EINTR;
RETURN(rc);
}
-
-int osc_quota_adjust_qunit(struct obd_export *exp,
- struct quota_adjust_qunit *oqaq,
- struct lustre_quota_ctxt *qctxt,
- struct ptlrpc_request_set *rqset)
-{
- struct ptlrpc_request *req;
- struct quota_adjust_qunit *oqa;
- int rc = 0;
- ENTRY;
-
- /* client don't support this kind of operation, abort it */
- if (!(exp->exp_connect_flags & OBD_CONNECT_CHANGE_QS)) {
- CDEBUG(D_QUOTA, "osc: %s don't support change qunit size\n",
- exp->exp_obd->obd_name);
- RETURN(rc);
- }
- if (strcmp(exp->exp_obd->obd_type->typ_name, LUSTRE_OSC_NAME))
- RETURN(-EINVAL);
-
- LASSERT(rqset);
-
- req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
- &RQF_OST_QUOTA_ADJUST_QUNIT,
- LUSTRE_OST_VERSION,
- OST_QUOTA_ADJUST_QUNIT);
- if (req == NULL)
- RETURN(-ENOMEM);
-
- oqa = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_ADJUST_QUNIT);
- *oqa = *oqaq;
-
- ptlrpc_request_set_replen(req);
-
- ptlrpc_set_add_req(rqset, req);
- RETURN(rc);
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff