#include <obd_ost.h>
#include <obd_class.h>
#include <lprocfs_status.h>
+#include <libcfs/bitmap.h>
extern cfs_list_t obd_types;
cfs_spinlock_t obd_types_lock;
int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
+
+cfs_spinlock_t obd_minor_lock;
+/**
+ * Maximum number of OBD devices on a single node (includes devices
+ * from all filesystems mounted on a client). This limit is itself arbitrary,
+ * though the lov_user_md_{v1,v3} structures (used for specifying the
+ * striping layout from llapi_setstripe() and on directory default EAs)
+ * have a 16-bit limit on the starting OST index.
+ **/
+const int obd_minor_map_size = 65536;
+cfs_bitmap_t *obd_minor_map;
+
+int obd_minor_alloc(void)
+{
+ int ret;
+
+ cfs_spin_lock(&obd_minor_lock);
+ ret = cfs_find_first_zero_bit(obd_minor_map->data, obd_minor_map_size);
+ if (ret != obd_minor_map_size)
+ cfs_bitmap_set(obd_minor_map, ret);
+ else
+ ret = -1;
+ cfs_spin_unlock(&obd_minor_lock);
+
+ return ret;
+}
+void obd_minor_release(long minor)
+{
+ cfs_spin_lock(&obd_minor_lock);
+ cfs_bitmap_clear(obd_minor_map, minor);
+ cfs_spin_unlock(&obd_minor_lock);
+}
+
+int obd_minor_valid(long minor)
+{
+ int ret;
+
+ cfs_spin_lock(&obd_minor_lock);
+ ret = cfs_bitmap_check(obd_minor_map, minor);
+ cfs_spin_unlock(&obd_minor_lock);
+
+ return ret;
+}
+
+static CFS_LIST_HEAD(obd_dev_list);
+static const int obd_hash_init_bits = 10;
+static const int obd_hash_max_bits = 30;
+static const int obd_hash_bkt_bits = 10;
+
+static cfs_hash_t *obd_name_hash = NULL;
+static unsigned obd_name_hops_hash(cfs_hash_t *lh, const void *key,
+ unsigned mask)
+{
+ return cfs_hash_djb2_hash(key, strlen(key), mask);
+}
+
+static void *obd_name_hops_obj(cfs_hlist_node_t *hn)
+{
+ struct obd_device *obd = cfs_hlist_entry(hn, struct obd_device,
+ obd_name_node);
+ LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
+ "%p obd_magic %08x != %08x\n",
+ obd, obd->obd_magic, OBD_DEVICE_MAGIC);
+
+ return (void *)obd;
+}
+
+static void *obd_name_hops_key(cfs_hlist_node_t *hn)
+{
+ struct obd_device *obd = obd_name_hops_obj(hn);
+
+ return &obd->obd_name;
+}
+
+static int obd_name_hops_compare(const void *key, cfs_hlist_node_t *hn)
+{
+ void *nk = obd_name_hops_key(hn);
+
+ return strcmp(key, nk) == 0;
+}
+
+static void obd_name_hops_noop(cfs_hash_t *hs, cfs_hlist_node_t *hn)
+{
+ obd_name_hops_obj(hn);
+}
+
+static cfs_hash_ops_t obd_name_hops = {
+ .hs_hash = obd_name_hops_hash,
+ .hs_keycmp = obd_name_hops_compare,
+ .hs_key = obd_name_hops_key,
+ .hs_object = obd_name_hops_obj,
+ .hs_get = obd_name_hops_noop,
+ .hs_put_locked = obd_name_hops_noop,
+};
+
+static cfs_hash_t *obd_uuid_hash = NULL;
+static unsigned obd_uuid_hops_hash(cfs_hash_t *lh, const void *key,
+ unsigned mask)
+{
+ return cfs_hash_djb2_hash(key, strlen(key), mask);
+}
+
+static void *obd_uuid_hops_obj(cfs_hlist_node_t *hn)
+{
+ struct obd_device *obd = cfs_hlist_entry(hn, struct obd_device,
+ obd_uuid_node);
+ LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
+ "%p obd_magic %08x != %08x\n",
+ obd, obd->obd_magic, OBD_DEVICE_MAGIC);
+
+ return (void *)obd;
+}
+
+static void *obd_uuid_hops_key(cfs_hlist_node_t *hn)
+{
+ struct obd_device *obd = obd_uuid_hops_obj(hn);
+
+ return &obd->obd_uuid;
+}
+
+static int obd_uuid_hops_compare(const void *key, cfs_hlist_node_t *hn)
+{
+ void *nk = obd_uuid_hops_key(hn);
+
+ return obd_uuid_equals(key, nk);
+}
+
+static void obd_uuid_hops_noop(cfs_hash_t *hs, cfs_hlist_node_t *hn)
+{
+ obd_uuid_hops_obj(hn);
+}
+
+static cfs_hash_ops_t obd_uuid_hops = {
+ .hs_hash = obd_uuid_hops_hash,
+ .hs_keycmp = obd_uuid_hops_compare,
+ .hs_key = obd_uuid_hops_key,
+ .hs_object = obd_uuid_hops_obj,
+ .hs_get = obd_uuid_hops_noop,
+ .hs_put_locked = obd_uuid_hops_noop,
+};
+
+static cfs_hash_t *obd_minor_hash = NULL;
+static unsigned obd_minor_hops_hash(cfs_hash_t *lh, const void *key,
+ unsigned mask)
+{
+ return cfs_hash_u32_hash(*((__u32 *)key), mask);
+}
+
+static void *obd_minor_hops_obj(cfs_hlist_node_t *hn)
+{
+ struct obd_device *obd = cfs_hlist_entry(hn, struct obd_device,
+ obd_minor_node);
+ LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
+ "%p obd_magic %08x != %08x\n",
+ obd, obd->obd_magic, OBD_DEVICE_MAGIC);
+
+ return (void *)obd;
+}
+
+static void *obd_minor_hops_key(cfs_hlist_node_t *hn)
+{
+ struct obd_device *obd = obd_minor_hops_obj(hn);
+
+ return &obd->obd_minor;
+}
+
+static int obd_minor_hops_compare(const void *key, cfs_hlist_node_t *hn)
+{
+ __u32 *nk = obd_minor_hops_key(hn);
+
+ return *((__u32 *)key) == *nk;
+}
+
+static void obd_minor_hops_noop(cfs_hash_t *hs, cfs_hlist_node_t *hn)
+{
+ obd_minor_hops_obj(hn);
+}
+
+static cfs_hash_ops_t obd_minor_hops = {
+ .hs_hash = obd_minor_hops_hash,
+ .hs_keycmp = obd_minor_hops_compare,
+ .hs_key = obd_minor_hops_key,
+ .hs_object = obd_minor_hops_obj,
+ .hs_get = obd_minor_hops_noop,
+ .hs_put_locked = obd_minor_hops_noop,
+};
+
+int obd_hashes_init(void)
+{
+ obd_name_hash = cfs_hash_create("obd_name",
+ obd_hash_init_bits, obd_hash_max_bits,
+ obd_hash_bkt_bits, 0,
+ CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
+ &obd_name_hops,
+ CFS_HASH_DEFAULT | CFS_HASH_NO_ITEMREF);
+ if (obd_name_hash == NULL)
+ return -ENOMEM;
+
+ obd_uuid_hash = cfs_hash_create("obd_uuid",
+ obd_hash_init_bits, obd_hash_max_bits,
+ obd_hash_bkt_bits, 0,
+ CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
+ &obd_uuid_hops,
+ CFS_HASH_DEFAULT | CFS_HASH_NO_ITEMREF);
+ if (obd_name_hash == NULL)
+ return -ENOMEM;
+
+ obd_minor_hash = cfs_hash_create("obd_minor",
+ obd_hash_init_bits, obd_hash_max_bits,
+ obd_hash_bkt_bits, 0,
+ CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
+ &obd_minor_hops,
+ CFS_HASH_DEFAULT | CFS_HASH_NO_ITEMREF);
+ if (obd_name_hash == NULL)
+ return -ENOMEM;
+
+ obd_minor_map = CFS_ALLOCATE_BITMAP(obd_minor_map_size);
+ if (obd_minor_map == NULL)
+ return -ENOMEM;
+
+ cfs_spin_lock_init(&obd_minor_lock);
+
+ return 0;
+}
+
+void obd_hashes_fini(void)
+{
+ if (obd_minor_map)
+ CFS_FREE_BITMAP(obd_minor_map);
+ cfs_hash_putref(obd_name_hash);
+ cfs_hash_putref(obd_uuid_hash);
+ cfs_hash_putref(obd_minor_hash);
+}
+
/*
* support functions: we could use inter-module communication, but this
* is more portable to other OS's
RETURN(0);
} /* class_unregister_type */
+const char *obd_dev_status(struct obd_device *obd)
+{
+ const char *status;
+
+ if (obd->obd_stopping)
+ status = "ST";
+ else if (obd->obd_inactive)
+ status = "IN";
+ else if (obd->obd_set_up)
+ status = "UP";
+ else if (obd->obd_attached)
+ status = "AT";
+ else
+ status = "--";
+
+ return status;
+}
+
+#define cfs_list_entry_safe(pos, head, type, member) \
+ (pos == head ? NULL : cfs_list_entry(pos, type, member))
+
+void obd_devlist_first(struct obd_device **pos)
+{
+ struct obd_device *obd;
+
+ cfs_spin_lock(&obd_dev_lock);
+ obd = cfs_list_entry_safe(obd_dev_list.next, &obd_dev_list,
+ struct obd_device, obd_list);
+ if (obd != NULL)
+ class_incref(obd, "devlist", obd);
+ cfs_spin_unlock(&obd_dev_lock);
+
+ *pos = obd;
+}
+
+void obd_devlist_next(struct obd_device **pos)
+{
+ struct obd_device *obd = NULL;
+
+ cfs_spin_lock(&obd_dev_lock);
+ obd = cfs_list_entry_safe((*pos)->obd_list.next, &obd_dev_list,
+ struct obd_device, obd_list);
+ if (obd)
+ class_incref(obd, "devlist", obd);
+ cfs_spin_unlock(&obd_dev_lock);
+
+ class_decref(*pos, "devlist", *pos);
+ *pos = obd;
+}
+
+void obd_devlist_last(struct obd_device *pos)
+{
+ if (pos)
+ class_decref(pos,"devlist", pos);
+
+}
+
/**
* Create a new obd device.
*
* \retval NULL if create fails, otherwise return the obd device
* pointer created.
*/
-struct obd_device *class_newdev(const char *type_name, const char *name)
+struct obd_device *class_newdev(const char *type_name, const char *name, const char *uuid)
{
- struct obd_device *result = NULL;
struct obd_device *newdev;
- struct obd_type *type = NULL;
- int i;
- int new_obd_minor = 0;
+ struct obd_type *type;
+ long ret;
if (strlen(name) >= MAX_OBD_NAME) {
CERROR("name/uuid must be < %u bytes long\n", MAX_OBD_NAME);
type = class_get_type(type_name);
if (type == NULL){
CERROR("OBD: unknown type: %s\n", type_name);
- RETURN(ERR_PTR(-ENODEV));
+ ret = -ENODEV;
+ goto error_type;
}
newdev = obd_device_alloc();
if (newdev == NULL) {
- class_put_type(type);
- RETURN(ERR_PTR(-ENOMEM));
+ ret = -ENOMEM;
+ goto error_device;
}
- LASSERT(newdev->obd_magic == OBD_DEVICE_MAGIC);
- cfs_spin_lock(&obd_dev_lock);
- for (i = 0; i < class_devno_max(); i++) {
- struct obd_device *obd = class_num2obd(i);
- if (obd && obd->obd_name &&
- (strcmp(name, obd->obd_name) == 0)) {
- CERROR("Device %s already exists, won't add\n", name);
- if (result) {
- LASSERTF(result->obd_magic == OBD_DEVICE_MAGIC,
- "%p obd_magic %08x != %08x\n", result,
- result->obd_magic, OBD_DEVICE_MAGIC);
- LASSERTF(result->obd_minor == new_obd_minor,
- "%p obd_minor %d != %d\n", result,
- result->obd_minor, new_obd_minor);
-
- obd_devs[result->obd_minor] = NULL;
- result->obd_name[0]='\0';
- }
- result = ERR_PTR(-EEXIST);
- break;
- }
- if (!result && !obd) {
- result = newdev;
- result->obd_minor = i;
- new_obd_minor = i;
- result->obd_type = type;
- strncpy(result->obd_name, name,
- sizeof(result->obd_name) - 1);
- obd_devs[i] = result;
- }
+ newdev->obd_minor = obd_minor_alloc();
+ if (newdev->obd_minor < 0) {
+ CERROR("don't have free minors\n");
+ ret = -ENODATA;
+ goto error_minor;
}
- cfs_spin_unlock(&obd_dev_lock);
- if (result == NULL && i >= class_devno_max()) {
- CERROR("all %u OBD devices used, increase MAX_OBD_DEVICES\n",
- class_devno_max());
- result = ERR_PTR(-EOVERFLOW);
+ /* find add unique by name */
+ strncpy(newdev->obd_name, name, sizeof(newdev->obd_name) - 1);
+ if (cfs_hash_add_unique(obd_name_hash, name, &newdev->obd_name_node)) {
+ CERROR("fails to add an unique obddev (%s) to the hash\n",
+ name);
+ ret = -EEXIST;
+ goto error_dup;
}
+ newdev->obd_type = type;
- if (IS_ERR(result)) {
- obd_device_free(newdev);
- class_put_type(type);
- } else {
- CDEBUG(D_IOCTL, "Adding new device %s (%p)\n",
- result->obd_name, result);
- }
- return result;
+ cfs_hash_add(obd_minor_hash, &newdev->obd_minor, &newdev->obd_minor_node);
+ memcpy(newdev->obd_uuid.uuid, uuid, strlen(uuid));
+ cfs_hash_add(obd_uuid_hash, uuid, &newdev->obd_uuid_node);
+
+ cfs_spin_lock(&obd_dev_lock);
+ cfs_list_add_tail(&newdev->obd_list, &obd_dev_list);
+ cfs_spin_unlock(&obd_dev_lock);
+
+ CDEBUG(D_IOCTL, "Adding new device %s (%p)\n",
+ newdev->obd_name, newdev);
+ RETURN(newdev);
+error_dup:
+ obd_minor_release(newdev->obd_minor);
+error_minor:
+ obd_device_free(newdev);
+error_device:
+ class_put_type(type);
+error_type:
+ RETURN(ERR_PTR(ret));
}
void class_release_dev(struct obd_device *obd)
LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "%p obd_magic %08x != %08x\n",
obd, obd->obd_magic, OBD_DEVICE_MAGIC);
- LASSERTF(obd == obd_devs[obd->obd_minor], "obd %p != obd_devs[%d] %p\n",
- obd, obd->obd_minor, obd_devs[obd->obd_minor]);
LASSERT(obd_type != NULL);
CDEBUG(D_INFO, "Release obd device %s obd_type name =%s\n",
obd->obd_name,obd->obd_type->typ_name);
+ cfs_hash_del(obd_name_hash, obd->obd_name, &obd->obd_name_node);
+ cfs_hash_del(obd_uuid_hash, &obd->obd_uuid, &obd->obd_uuid_node);
+ cfs_hash_del(obd_minor_hash, &obd->obd_minor, &obd->obd_minor_node);
+
cfs_spin_lock(&obd_dev_lock);
- obd_devs[obd->obd_minor] = NULL;
+ cfs_list_del(&obd->obd_list);
cfs_spin_unlock(&obd_dev_lock);
+
+ obd_minor_release(obd->obd_minor);
obd_device_free(obd);
class_put_type(obd_type);
int class_name2dev(const char *name)
{
- int i;
-
- if (!name)
- return -1;
-
- cfs_spin_lock(&obd_dev_lock);
- for (i = 0; i < class_devno_max(); i++) {
- struct obd_device *obd = class_num2obd(i);
- if (obd && obd->obd_name && strcmp(name, obd->obd_name) == 0) {
- /* Make sure we finished attaching before we give
- out any references */
- LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
- if (obd->obd_attached) {
- cfs_spin_unlock(&obd_dev_lock);
- return i;
- }
- break;
- }
- }
- cfs_spin_unlock(&obd_dev_lock);
+ struct obd_device *obd;
- return -1;
+ obd = cfs_hash_lookup(obd_name_hash, name);
+ return obd != NULL ? obd->obd_minor : -1 ;
}
struct obd_device *class_name2obd(const char *name)
{
- int dev = class_name2dev(name);
-
- if (dev < 0 || dev > class_devno_max())
- return NULL;
- return class_num2obd(dev);
+ return cfs_hash_lookup(obd_name_hash, name);
}
int class_uuid2dev(struct obd_uuid *uuid)
{
- int i;
-
- cfs_spin_lock(&obd_dev_lock);
- for (i = 0; i < class_devno_max(); i++) {
- struct obd_device *obd = class_num2obd(i);
- if (obd && obd_uuid_equals(uuid, &obd->obd_uuid)) {
- LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
- cfs_spin_unlock(&obd_dev_lock);
- return i;
- }
- }
- cfs_spin_unlock(&obd_dev_lock);
+ struct obd_device *obd;
- return -1;
+ obd = cfs_hash_lookup(obd_uuid_hash, uuid);
+ return obd != NULL ? obd->obd_minor : -1;
}
struct obd_device *class_uuid2obd(struct obd_uuid *uuid)
{
- int dev = class_uuid2dev(uuid);
- if (dev < 0)
- return NULL;
- return class_num2obd(dev);
+ return cfs_hash_lookup(obd_uuid_hash, uuid);
}
/**
* \retval NULL if ::obd_devs[\a num] does not contains an obd device
* otherwise return the obd device there.
*/
-struct obd_device *class_num2obd(int num)
+struct obd_device *class_num2obd(__u32 minor)
{
- struct obd_device *obd = NULL;
+ struct obd_device *obd;
- if (num < class_devno_max()) {
- obd = obd_devs[num];
- if (obd == NULL)
- return NULL;
-
- LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
- "%p obd_magic %08x != %08x\n",
- obd, obd->obd_magic, OBD_DEVICE_MAGIC);
- LASSERTF(obd->obd_minor == num,
- "%p obd_minor %0d != %0d\n",
- obd, obd->obd_minor, num);
- }
+ obd = cfs_hash_lookup(obd_minor_hash, &minor);
return obd;
}
void class_obd_list(void)
{
- char *status;
- int i;
+ const char *status;
+ struct obd_device *obd;
- cfs_spin_lock(&obd_dev_lock);
- for (i = 0; i < class_devno_max(); i++) {
- struct obd_device *obd = class_num2obd(i);
- if (obd == NULL)
- continue;
- if (obd->obd_stopping)
- status = "ST";
- else if (obd->obd_set_up)
- status = "UP";
- else if (obd->obd_attached)
- status = "AT";
- else
- status = "--";
+ for (obd_devlist_first(&obd);
+ obd != NULL;
+ obd_devlist_next(&obd)) {
+
+ status = obd_dev_status(obd);
LCONSOLE(D_CONFIG, "%3d %s %s %s %s %d\n",
- i, status, obd->obd_type->typ_name,
+ obd->obd_minor, status, obd->obd_type->typ_name,
obd->obd_name, obd->obd_uuid.uuid,
cfs_atomic_read(&obd->obd_refcount));
}
- cfs_spin_unlock(&obd_dev_lock);
return;
}
const char * typ_name,
struct obd_uuid *grp_uuid)
{
- int i;
+ struct obd_device *obd;
- cfs_spin_lock(&obd_dev_lock);
- for (i = 0; i < class_devno_max(); i++) {
- struct obd_device *obd = class_num2obd(i);
- if (obd == NULL)
- continue;
+ for (obd_devlist_first(&obd);
+ obd != NULL;
+ obd_devlist_next(&obd)) {
+ /* XXX per type list ? */
if ((strncmp(obd->obd_type->typ_name, typ_name,
strlen(typ_name)) == 0)) {
if (obd_uuid_equals(tgt_uuid,
&obd->u.cli.cl_target_uuid) &&
((grp_uuid)? obd_uuid_equals(grp_uuid,
&obd->obd_uuid) : 1)) {
- cfs_spin_unlock(&obd_dev_lock);
+ obd_devlist_last(obd);
return obd;
}
}
}
- cfs_spin_unlock(&obd_dev_lock);
return NULL;
}
searching at *next, and if a device is found, the next index to look
at is saved in *next. If next is NULL, then the first matching device
will always be returned. */
-struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid, int *next)
+struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid,
+ struct obd_device **prev)
{
- int i;
+ struct obd_device *obd = *prev;
- if (next == NULL)
- i = 0;
- else if (*next >= 0 && *next < class_devno_max())
- i = *next;
+ if (obd == NULL)
+ obd_devlist_first(&obd);
else
- return NULL;
+ obd_devlist_next(&obd);
- cfs_spin_lock(&obd_dev_lock);
- for (; i < class_devno_max(); i++) {
- struct obd_device *obd = class_num2obd(i);
- if (obd == NULL)
- continue;
+
+ for (; obd != NULL; obd_devlist_next(&obd)) {
if (obd_uuid_equals(grp_uuid, &obd->obd_uuid)) {
- if (next != NULL)
- *next = i+1;
- cfs_spin_unlock(&obd_dev_lock);
+ /* XXX return with reference */
+ *prev = obd;
return obd;
}
}
- cfs_spin_unlock(&obd_dev_lock);
return NULL;
}
{
struct obd_device *obd;
const char *type;
- int i, rc = 0, rc2;
+ int rc = 0, rc2;
LASSERT(namelen > 0);
- cfs_spin_lock(&obd_dev_lock);
- for (i = 0; i < class_devno_max(); i++) {
- obd = class_num2obd(i);
-
- if (obd == NULL || obd->obd_set_up == 0 || obd->obd_stopping)
+ for (obd_devlist_first(&obd);
+ obd != NULL;
+ obd_devlist_next(&obd)) {
+ if (obd->obd_set_up == 0 || obd->obd_stopping)
continue;
/* only notify mdc, osc, mdt, ost */
if (strncmp(obd->obd_name, fsname, namelen))
continue;
- class_incref(obd, __FUNCTION__, obd);
- cfs_spin_unlock(&obd_dev_lock);
+ /** XXX - some new obd can be added at that point */
rc2 = obd_set_info_async(obd->obd_self_export,
sizeof(KEY_SPTLRPC_CONF),
KEY_SPTLRPC_CONF, 0, NULL, NULL);
rc = rc ? rc : rc2;
- class_decref(obd, __FUNCTION__, obd);
- cfs_spin_lock(&obd_dev_lock);
}
- cfs_spin_unlock(&obd_dev_lock);
+
return rc;
}
EXPORT_SYMBOL(class_notify_sptlrpc_conf);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff