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- /*
- * Copyright (c) 2004 Topspin Communications. All rights reserved.
- * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses. You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the following
- * disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
- #include <linux/module.h>
- #include <linux/string.h>
- #include <linux/errno.h>
- #include <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/init.h>
- #include <linux/netdevice.h>
- #include <net/net_namespace.h>
- #include <linux/security.h>
- #include <linux/notifier.h>
- #include <linux/hashtable.h>
- #include <rdma/rdma_netlink.h>
- #include <rdma/ib_addr.h>
- #include <rdma/ib_cache.h>
- #include <rdma/rdma_counter.h>
- #include "core_priv.h"
- #include "restrack.h"
- MODULE_AUTHOR("Roland Dreier");
- MODULE_DESCRIPTION("core kernel InfiniBand API");
- MODULE_LICENSE("Dual BSD/GPL");
- struct workqueue_struct *ib_comp_wq;
- struct workqueue_struct *ib_comp_unbound_wq;
- struct workqueue_struct *ib_wq;
- EXPORT_SYMBOL_GPL(ib_wq);
- /*
- * Each of the three rwsem locks (devices, clients, client_data) protects the
- * xarray of the same name. Specifically it allows the caller to assert that
- * the MARK will/will not be changing under the lock, and for devices and
- * clients, that the value in the xarray is still a valid pointer. Change of
- * the MARK is linked to the object state, so holding the lock and testing the
- * MARK also asserts that the contained object is in a certain state.
- *
- * This is used to build a two stage register/unregister flow where objects
- * can continue to be in the xarray even though they are still in progress to
- * register/unregister.
- *
- * The xarray itself provides additional locking, and restartable iteration,
- * which is also relied on.
- *
- * Locks should not be nested, with the exception of client_data, which is
- * allowed to nest under the read side of the other two locks.
- *
- * The devices_rwsem also protects the device name list, any change or
- * assignment of device name must also hold the write side to guarantee unique
- * names.
- */
- /*
- * devices contains devices that have had their names assigned. The
- * devices may not be registered. Users that care about the registration
- * status need to call ib_device_try_get() on the device to ensure it is
- * registered, and keep it registered, for the required duration.
- *
- */
- static DEFINE_XARRAY_FLAGS(devices, XA_FLAGS_ALLOC);
- static DECLARE_RWSEM(devices_rwsem);
- #define DEVICE_REGISTERED XA_MARK_1
- static u32 highest_client_id;
- #define CLIENT_REGISTERED XA_MARK_1
- static DEFINE_XARRAY_FLAGS(clients, XA_FLAGS_ALLOC);
- static DECLARE_RWSEM(clients_rwsem);
- static void ib_client_put(struct ib_client *client)
- {
- if (refcount_dec_and_test(&client->uses))
- complete(&client->uses_zero);
- }
- /*
- * If client_data is registered then the corresponding client must also still
- * be registered.
- */
- #define CLIENT_DATA_REGISTERED XA_MARK_1
- unsigned int rdma_dev_net_id;
- /*
- * A list of net namespaces is maintained in an xarray. This is necessary
- * because we can't get the locking right using the existing net ns list. We
- * would require a init_net callback after the list is updated.
- */
- static DEFINE_XARRAY_FLAGS(rdma_nets, XA_FLAGS_ALLOC);
- /*
- * rwsem to protect accessing the rdma_nets xarray entries.
- */
- static DECLARE_RWSEM(rdma_nets_rwsem);
- bool ib_devices_shared_netns = true;
- module_param_named(netns_mode, ib_devices_shared_netns, bool, 0444);
- MODULE_PARM_DESC(netns_mode,
- "Share device among net namespaces; default=1 (shared)");
- /**
- * rdma_dev_access_netns() - Return whether an rdma device can be accessed
- * from a specified net namespace or not.
- * @dev: Pointer to rdma device which needs to be checked
- * @net: Pointer to net namesapce for which access to be checked
- *
- * When the rdma device is in shared mode, it ignores the net namespace.
- * When the rdma device is exclusive to a net namespace, rdma device net
- * namespace is checked against the specified one.
- */
- bool rdma_dev_access_netns(const struct ib_device *dev, const struct net *net)
- {
- return (ib_devices_shared_netns ||
- net_eq(read_pnet(&dev->coredev.rdma_net), net));
- }
- EXPORT_SYMBOL(rdma_dev_access_netns);
- /*
- * xarray has this behavior where it won't iterate over NULL values stored in
- * allocated arrays. So we need our own iterator to see all values stored in
- * the array. This does the same thing as xa_for_each except that it also
- * returns NULL valued entries if the array is allocating. Simplified to only
- * work on simple xarrays.
- */
- static void *xan_find_marked(struct xarray *xa, unsigned long *indexp,
- xa_mark_t filter)
- {
- XA_STATE(xas, xa, *indexp);
- void *entry;
- rcu_read_lock();
- do {
- entry = xas_find_marked(&xas, ULONG_MAX, filter);
- if (xa_is_zero(entry))
- break;
- } while (xas_retry(&xas, entry));
- rcu_read_unlock();
- if (entry) {
- *indexp = xas.xa_index;
- if (xa_is_zero(entry))
- return NULL;
- return entry;
- }
- return XA_ERROR(-ENOENT);
- }
- #define xan_for_each_marked(xa, index, entry, filter) \
- for (index = 0, entry = xan_find_marked(xa, &(index), filter); \
- !xa_is_err(entry); \
- (index)++, entry = xan_find_marked(xa, &(index), filter))
- /* RCU hash table mapping netdevice pointers to struct ib_port_data */
- static DEFINE_SPINLOCK(ndev_hash_lock);
- static DECLARE_HASHTABLE(ndev_hash, 5);
- static void free_netdevs(struct ib_device *ib_dev);
- static void ib_unregister_work(struct work_struct *work);
- static void __ib_unregister_device(struct ib_device *device);
- static int ib_security_change(struct notifier_block *nb, unsigned long event,
- void *lsm_data);
- static void ib_policy_change_task(struct work_struct *work);
- static DECLARE_WORK(ib_policy_change_work, ib_policy_change_task);
- static void __ibdev_printk(const char *level, const struct ib_device *ibdev,
- struct va_format *vaf)
- {
- if (ibdev && ibdev->dev.parent)
- dev_printk_emit(level[1] - '0',
- ibdev->dev.parent,
- "%s %s %s: %pV",
- dev_driver_string(ibdev->dev.parent),
- dev_name(ibdev->dev.parent),
- dev_name(&ibdev->dev),
- vaf);
- else if (ibdev)
- printk("%s%s: %pV",
- level, dev_name(&ibdev->dev), vaf);
- else
- printk("%s(NULL ib_device): %pV", level, vaf);
- }
- void ibdev_printk(const char *level, const struct ib_device *ibdev,
- const char *format, ...)
- {
- struct va_format vaf;
- va_list args;
- va_start(args, format);
- vaf.fmt = format;
- vaf.va = &args;
- __ibdev_printk(level, ibdev, &vaf);
- va_end(args);
- }
- EXPORT_SYMBOL(ibdev_printk);
- #define define_ibdev_printk_level(func, level) \
- void func(const struct ib_device *ibdev, const char *fmt, ...) \
- { \
- struct va_format vaf; \
- va_list args; \
- \
- va_start(args, fmt); \
- \
- vaf.fmt = fmt; \
- vaf.va = &args; \
- \
- __ibdev_printk(level, ibdev, &vaf); \
- \
- va_end(args); \
- } \
- EXPORT_SYMBOL(func);
- define_ibdev_printk_level(ibdev_emerg, KERN_EMERG);
- define_ibdev_printk_level(ibdev_alert, KERN_ALERT);
- define_ibdev_printk_level(ibdev_crit, KERN_CRIT);
- define_ibdev_printk_level(ibdev_err, KERN_ERR);
- define_ibdev_printk_level(ibdev_warn, KERN_WARNING);
- define_ibdev_printk_level(ibdev_notice, KERN_NOTICE);
- define_ibdev_printk_level(ibdev_info, KERN_INFO);
- static struct notifier_block ibdev_lsm_nb = {
- .notifier_call = ib_security_change,
- };
- static int rdma_dev_change_netns(struct ib_device *device, struct net *cur_net,
- struct net *net);
- /* Pointer to the RCU head at the start of the ib_port_data array */
- struct ib_port_data_rcu {
- struct rcu_head rcu_head;
- struct ib_port_data pdata[];
- };
- static void ib_device_check_mandatory(struct ib_device *device)
- {
- #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device_ops, x), #x }
- static const struct {
- size_t offset;
- char *name;
- } mandatory_table[] = {
- IB_MANDATORY_FUNC(query_device),
- IB_MANDATORY_FUNC(query_port),
- IB_MANDATORY_FUNC(alloc_pd),
- IB_MANDATORY_FUNC(dealloc_pd),
- IB_MANDATORY_FUNC(create_qp),
- IB_MANDATORY_FUNC(modify_qp),
- IB_MANDATORY_FUNC(destroy_qp),
- IB_MANDATORY_FUNC(post_send),
- IB_MANDATORY_FUNC(post_recv),
- IB_MANDATORY_FUNC(create_cq),
- IB_MANDATORY_FUNC(destroy_cq),
- IB_MANDATORY_FUNC(poll_cq),
- IB_MANDATORY_FUNC(req_notify_cq),
- IB_MANDATORY_FUNC(get_dma_mr),
- IB_MANDATORY_FUNC(dereg_mr),
- IB_MANDATORY_FUNC(get_port_immutable)
- };
- int i;
- device->kverbs_provider = true;
- for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) {
- if (!*(void **) ((void *) &device->ops +
- mandatory_table[i].offset)) {
- device->kverbs_provider = false;
- break;
- }
- }
- }
- /*
- * Caller must perform ib_device_put() to return the device reference count
- * when ib_device_get_by_index() returns valid device pointer.
- */
- struct ib_device *ib_device_get_by_index(const struct net *net, u32 index)
- {
- struct ib_device *device;
- down_read(&devices_rwsem);
- device = xa_load(&devices, index);
- if (device) {
- if (!rdma_dev_access_netns(device, net)) {
- device = NULL;
- goto out;
- }
- if (!ib_device_try_get(device))
- device = NULL;
- }
- out:
- up_read(&devices_rwsem);
- return device;
- }
- /**
- * ib_device_put - Release IB device reference
- * @device: device whose reference to be released
- *
- * ib_device_put() releases reference to the IB device to allow it to be
- * unregistered and eventually free.
- */
- void ib_device_put(struct ib_device *device)
- {
- if (refcount_dec_and_test(&device->refcount))
- complete(&device->unreg_completion);
- }
- EXPORT_SYMBOL(ib_device_put);
- static struct ib_device *__ib_device_get_by_name(const char *name)
- {
- struct ib_device *device;
- unsigned long index;
- xa_for_each (&devices, index, device)
- if (!strcmp(name, dev_name(&device->dev)))
- return device;
- return NULL;
- }
- /**
- * ib_device_get_by_name - Find an IB device by name
- * @name: The name to look for
- * @driver_id: The driver ID that must match (RDMA_DRIVER_UNKNOWN matches all)
- *
- * Find and hold an ib_device by its name. The caller must call
- * ib_device_put() on the returned pointer.
- */
- struct ib_device *ib_device_get_by_name(const char *name,
- enum rdma_driver_id driver_id)
- {
- struct ib_device *device;
- down_read(&devices_rwsem);
- device = __ib_device_get_by_name(name);
- if (device && driver_id != RDMA_DRIVER_UNKNOWN &&
- device->ops.driver_id != driver_id)
- device = NULL;
- if (device) {
- if (!ib_device_try_get(device))
- device = NULL;
- }
- up_read(&devices_rwsem);
- return device;
- }
- EXPORT_SYMBOL(ib_device_get_by_name);
- static int rename_compat_devs(struct ib_device *device)
- {
- struct ib_core_device *cdev;
- unsigned long index;
- int ret = 0;
- mutex_lock(&device->compat_devs_mutex);
- xa_for_each (&device->compat_devs, index, cdev) {
- ret = device_rename(&cdev->dev, dev_name(&device->dev));
- if (ret) {
- dev_warn(&cdev->dev,
- "Fail to rename compatdev to new name %s\n",
- dev_name(&device->dev));
- break;
- }
- }
- mutex_unlock(&device->compat_devs_mutex);
- return ret;
- }
- int ib_device_rename(struct ib_device *ibdev, const char *name)
- {
- unsigned long index;
- void *client_data;
- int ret;
- down_write(&devices_rwsem);
- if (!strcmp(name, dev_name(&ibdev->dev))) {
- up_write(&devices_rwsem);
- return 0;
- }
- if (__ib_device_get_by_name(name)) {
- up_write(&devices_rwsem);
- return -EEXIST;
- }
- ret = device_rename(&ibdev->dev, name);
- if (ret) {
- up_write(&devices_rwsem);
- return ret;
- }
- strlcpy(ibdev->name, name, IB_DEVICE_NAME_MAX);
- ret = rename_compat_devs(ibdev);
- downgrade_write(&devices_rwsem);
- down_read(&ibdev->client_data_rwsem);
- xan_for_each_marked(&ibdev->client_data, index, client_data,
- CLIENT_DATA_REGISTERED) {
- struct ib_client *client = xa_load(&clients, index);
- if (!client || !client->rename)
- continue;
- client->rename(ibdev, client_data);
- }
- up_read(&ibdev->client_data_rwsem);
- up_read(&devices_rwsem);
- return 0;
- }
- int ib_device_set_dim(struct ib_device *ibdev, u8 use_dim)
- {
- if (use_dim > 1)
- return -EINVAL;
- ibdev->use_cq_dim = use_dim;
- return 0;
- }
- static int alloc_name(struct ib_device *ibdev, const char *name)
- {
- struct ib_device *device;
- unsigned long index;
- struct ida inuse;
- int rc;
- int i;
- lockdep_assert_held_write(&devices_rwsem);
- ida_init(&inuse);
- xa_for_each (&devices, index, device) {
- char buf[IB_DEVICE_NAME_MAX];
- if (sscanf(dev_name(&device->dev), name, &i) != 1)
- continue;
- if (i < 0 || i >= INT_MAX)
- continue;
- snprintf(buf, sizeof buf, name, i);
- if (strcmp(buf, dev_name(&device->dev)) != 0)
- continue;
- rc = ida_alloc_range(&inuse, i, i, GFP_KERNEL);
- if (rc < 0)
- goto out;
- }
- rc = ida_alloc(&inuse, GFP_KERNEL);
- if (rc < 0)
- goto out;
- rc = dev_set_name(&ibdev->dev, name, rc);
- out:
- ida_destroy(&inuse);
- return rc;
- }
- static void ib_device_release(struct device *device)
- {
- struct ib_device *dev = container_of(device, struct ib_device, dev);
- free_netdevs(dev);
- WARN_ON(refcount_read(&dev->refcount));
- if (dev->port_data) {
- ib_cache_release_one(dev);
- ib_security_release_port_pkey_list(dev);
- rdma_counter_release(dev);
- kfree_rcu(container_of(dev->port_data, struct ib_port_data_rcu,
- pdata[0]),
- rcu_head);
- }
- mutex_destroy(&dev->unregistration_lock);
- mutex_destroy(&dev->compat_devs_mutex);
- xa_destroy(&dev->compat_devs);
- xa_destroy(&dev->client_data);
- kfree_rcu(dev, rcu_head);
- }
- static int ib_device_uevent(struct device *device,
- struct kobj_uevent_env *env)
- {
- if (add_uevent_var(env, "NAME=%s", dev_name(device)))
- return -ENOMEM;
- /*
- * It would be nice to pass the node GUID with the event...
- */
- return 0;
- }
- static const void *net_namespace(struct device *d)
- {
- struct ib_core_device *coredev =
- container_of(d, struct ib_core_device, dev);
- return read_pnet(&coredev->rdma_net);
- }
- static struct class ib_class = {
- .name = "infiniband",
- .dev_release = ib_device_release,
- .dev_uevent = ib_device_uevent,
- .ns_type = &net_ns_type_operations,
- .namespace = net_namespace,
- };
- static void rdma_init_coredev(struct ib_core_device *coredev,
- struct ib_device *dev, struct net *net)
- {
- /* This BUILD_BUG_ON is intended to catch layout change
- * of union of ib_core_device and device.
- * dev must be the first element as ib_core and providers
- * driver uses it. Adding anything in ib_core_device before
- * device will break this assumption.
- */
- BUILD_BUG_ON(offsetof(struct ib_device, coredev.dev) !=
- offsetof(struct ib_device, dev));
- coredev->dev.class = &ib_class;
- coredev->dev.groups = dev->groups;
- device_initialize(&coredev->dev);
- coredev->owner = dev;
- INIT_LIST_HEAD(&coredev->port_list);
- write_pnet(&coredev->rdma_net, net);
- }
- /**
- * _ib_alloc_device - allocate an IB device struct
- * @size:size of structure to allocate
- *
- * Low-level drivers should use ib_alloc_device() to allocate &struct
- * ib_device. @size is the size of the structure to be allocated,
- * including any private data used by the low-level driver.
- * ib_dealloc_device() must be used to free structures allocated with
- * ib_alloc_device().
- */
- struct ib_device *_ib_alloc_device(size_t size)
- {
- struct ib_device *device;
- if (WARN_ON(size < sizeof(struct ib_device)))
- return NULL;
- device = kzalloc(size, GFP_KERNEL);
- if (!device)
- return NULL;
- if (rdma_restrack_init(device)) {
- kfree(device);
- return NULL;
- }
- device->groups[0] = &ib_dev_attr_group;
- rdma_init_coredev(&device->coredev, device, &init_net);
- INIT_LIST_HEAD(&device->event_handler_list);
- spin_lock_init(&device->qp_open_list_lock);
- init_rwsem(&device->event_handler_rwsem);
- mutex_init(&device->unregistration_lock);
- /*
- * client_data needs to be alloc because we don't want our mark to be
- * destroyed if the user stores NULL in the client data.
- */
- xa_init_flags(&device->client_data, XA_FLAGS_ALLOC);
- init_rwsem(&device->client_data_rwsem);
- xa_init_flags(&device->compat_devs, XA_FLAGS_ALLOC);
- mutex_init(&device->compat_devs_mutex);
- init_completion(&device->unreg_completion);
- INIT_WORK(&device->unregistration_work, ib_unregister_work);
- return device;
- }
- EXPORT_SYMBOL(_ib_alloc_device);
- /**
- * ib_dealloc_device - free an IB device struct
- * @device:structure to free
- *
- * Free a structure allocated with ib_alloc_device().
- */
- void ib_dealloc_device(struct ib_device *device)
- {
- if (device->ops.dealloc_driver)
- device->ops.dealloc_driver(device);
- /*
- * ib_unregister_driver() requires all devices to remain in the xarray
- * while their ops are callable. The last op we call is dealloc_driver
- * above. This is needed to create a fence on op callbacks prior to
- * allowing the driver module to unload.
- */
- down_write(&devices_rwsem);
- if (xa_load(&devices, device->index) == device)
- xa_erase(&devices, device->index);
- up_write(&devices_rwsem);
- /* Expedite releasing netdev references */
- free_netdevs(device);
- WARN_ON(!xa_empty(&device->compat_devs));
- WARN_ON(!xa_empty(&device->client_data));
- WARN_ON(refcount_read(&device->refcount));
- rdma_restrack_clean(device);
- /* Balances with device_initialize */
- put_device(&device->dev);
- }
- EXPORT_SYMBOL(ib_dealloc_device);
- /*
- * add_client_context() and remove_client_context() must be safe against
- * parallel calls on the same device - registration/unregistration of both the
- * device and client can be occurring in parallel.
- *
- * The routines need to be a fence, any caller must not return until the add
- * or remove is fully completed.
- */
- static int add_client_context(struct ib_device *device,
- struct ib_client *client)
- {
- int ret = 0;
- if (!device->kverbs_provider && !client->no_kverbs_req)
- return 0;
- down_write(&device->client_data_rwsem);
- /*
- * So long as the client is registered hold both the client and device
- * unregistration locks.
- */
- if (!refcount_inc_not_zero(&client->uses))
- goto out_unlock;
- refcount_inc(&device->refcount);
- /*
- * Another caller to add_client_context got here first and has already
- * completely initialized context.
- */
- if (xa_get_mark(&device->client_data, client->client_id,
- CLIENT_DATA_REGISTERED))
- goto out;
- ret = xa_err(xa_store(&device->client_data, client->client_id, NULL,
- GFP_KERNEL));
- if (ret)
- goto out;
- downgrade_write(&device->client_data_rwsem);
- if (client->add) {
- if (client->add(device)) {
- /*
- * If a client fails to add then the error code is
- * ignored, but we won't call any more ops on this
- * client.
- */
- xa_erase(&device->client_data, client->client_id);
- up_read(&device->client_data_rwsem);
- ib_device_put(device);
- ib_client_put(client);
- return 0;
- }
- }
- /* Readers shall not see a client until add has been completed */
- xa_set_mark(&device->client_data, client->client_id,
- CLIENT_DATA_REGISTERED);
- up_read(&device->client_data_rwsem);
- return 0;
- out:
- ib_device_put(device);
- ib_client_put(client);
- out_unlock:
- up_write(&device->client_data_rwsem);
- return ret;
- }
- static void remove_client_context(struct ib_device *device,
- unsigned int client_id)
- {
- struct ib_client *client;
- void *client_data;
- down_write(&device->client_data_rwsem);
- if (!xa_get_mark(&device->client_data, client_id,
- CLIENT_DATA_REGISTERED)) {
- up_write(&device->client_data_rwsem);
- return;
- }
- client_data = xa_load(&device->client_data, client_id);
- xa_clear_mark(&device->client_data, client_id, CLIENT_DATA_REGISTERED);
- client = xa_load(&clients, client_id);
- up_write(&device->client_data_rwsem);
- /*
- * Notice we cannot be holding any exclusive locks when calling the
- * remove callback as the remove callback can recurse back into any
- * public functions in this module and thus try for any locks those
- * functions take.
- *
- * For this reason clients and drivers should not call the
- * unregistration functions will holdling any locks.
- */
- if (client->remove)
- client->remove(device, client_data);
- xa_erase(&device->client_data, client_id);
- ib_device_put(device);
- ib_client_put(client);
- }
- static int alloc_port_data(struct ib_device *device)
- {
- struct ib_port_data_rcu *pdata_rcu;
- unsigned int port;
- if (device->port_data)
- return 0;
- /* This can only be called once the physical port range is defined */
- if (WARN_ON(!device->phys_port_cnt))
- return -EINVAL;
- /*
- * device->port_data is indexed directly by the port number to make
- * access to this data as efficient as possible.
- *
- * Therefore port_data is declared as a 1 based array with potential
- * empty slots at the beginning.
- */
- pdata_rcu = kzalloc(struct_size(pdata_rcu, pdata,
- rdma_end_port(device) + 1),
- GFP_KERNEL);
- if (!pdata_rcu)
- return -ENOMEM;
- /*
- * The rcu_head is put in front of the port data array and the stored
- * pointer is adjusted since we never need to see that member until
- * kfree_rcu.
- */
- device->port_data = pdata_rcu->pdata;
- rdma_for_each_port (device, port) {
- struct ib_port_data *pdata = &device->port_data[port];
- pdata->ib_dev = device;
- spin_lock_init(&pdata->pkey_list_lock);
- INIT_LIST_HEAD(&pdata->pkey_list);
- spin_lock_init(&pdata->netdev_lock);
- INIT_HLIST_NODE(&pdata->ndev_hash_link);
- }
- return 0;
- }
- static int verify_immutable(const struct ib_device *dev, u8 port)
- {
- return WARN_ON(!rdma_cap_ib_mad(dev, port) &&
- rdma_max_mad_size(dev, port) != 0);
- }
- static int setup_port_data(struct ib_device *device)
- {
- unsigned int port;
- int ret;
- ret = alloc_port_data(device);
- if (ret)
- return ret;
- rdma_for_each_port (device, port) {
- struct ib_port_data *pdata = &device->port_data[port];
- ret = device->ops.get_port_immutable(device, port,
- &pdata->immutable);
- if (ret)
- return ret;
- if (verify_immutable(device, port))
- return -EINVAL;
- }
- return 0;
- }
- void ib_get_device_fw_str(struct ib_device *dev, char *str)
- {
- if (dev->ops.get_dev_fw_str)
- dev->ops.get_dev_fw_str(dev, str);
- else
- str[0] = '\0';
- }
- EXPORT_SYMBOL(ib_get_device_fw_str);
- static void ib_policy_change_task(struct work_struct *work)
- {
- struct ib_device *dev;
- unsigned long index;
- down_read(&devices_rwsem);
- xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) {
- unsigned int i;
- rdma_for_each_port (dev, i) {
- u64 sp;
- int ret = ib_get_cached_subnet_prefix(dev,
- i,
- &sp);
- WARN_ONCE(ret,
- "ib_get_cached_subnet_prefix err: %d, this should never happen here\n",
- ret);
- if (!ret)
- ib_security_cache_change(dev, i, sp);
- }
- }
- up_read(&devices_rwsem);
- }
- static int ib_security_change(struct notifier_block *nb, unsigned long event,
- void *lsm_data)
- {
- if (event != LSM_POLICY_CHANGE)
- return NOTIFY_DONE;
- schedule_work(&ib_policy_change_work);
- ib_mad_agent_security_change();
- return NOTIFY_OK;
- }
- static void compatdev_release(struct device *dev)
- {
- struct ib_core_device *cdev =
- container_of(dev, struct ib_core_device, dev);
- kfree(cdev);
- }
- static int add_one_compat_dev(struct ib_device *device,
- struct rdma_dev_net *rnet)
- {
- struct ib_core_device *cdev;
- int ret;
- lockdep_assert_held(&rdma_nets_rwsem);
- if (!ib_devices_shared_netns)
- return 0;
- /*
- * Create and add compat device in all namespaces other than where it
- * is currently bound to.
- */
- if (net_eq(read_pnet(&rnet->net),
- read_pnet(&device->coredev.rdma_net)))
- return 0;
- /*
- * The first of init_net() or ib_register_device() to take the
- * compat_devs_mutex wins and gets to add the device. Others will wait
- * for completion here.
- */
- mutex_lock(&device->compat_devs_mutex);
- cdev = xa_load(&device->compat_devs, rnet->id);
- if (cdev) {
- ret = 0;
- goto done;
- }
- ret = xa_reserve(&device->compat_devs, rnet->id, GFP_KERNEL);
- if (ret)
- goto done;
- cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
- if (!cdev) {
- ret = -ENOMEM;
- goto cdev_err;
- }
- cdev->dev.parent = device->dev.parent;
- rdma_init_coredev(cdev, device, read_pnet(&rnet->net));
- cdev->dev.release = compatdev_release;
- ret = dev_set_name(&cdev->dev, "%s", dev_name(&device->dev));
- if (ret)
- goto add_err;
- ret = device_add(&cdev->dev);
- if (ret)
- goto add_err;
- ret = ib_setup_port_attrs(cdev);
- if (ret)
- goto port_err;
- ret = xa_err(xa_store(&device->compat_devs, rnet->id,
- cdev, GFP_KERNEL));
- if (ret)
- goto insert_err;
- mutex_unlock(&device->compat_devs_mutex);
- return 0;
- insert_err:
- ib_free_port_attrs(cdev);
- port_err:
- device_del(&cdev->dev);
- add_err:
- put_device(&cdev->dev);
- cdev_err:
- xa_release(&device->compat_devs, rnet->id);
- done:
- mutex_unlock(&device->compat_devs_mutex);
- return ret;
- }
- static void remove_one_compat_dev(struct ib_device *device, u32 id)
- {
- struct ib_core_device *cdev;
- mutex_lock(&device->compat_devs_mutex);
- cdev = xa_erase(&device->compat_devs, id);
- mutex_unlock(&device->compat_devs_mutex);
- if (cdev) {
- ib_free_port_attrs(cdev);
- device_del(&cdev->dev);
- put_device(&cdev->dev);
- }
- }
- static void remove_compat_devs(struct ib_device *device)
- {
- struct ib_core_device *cdev;
- unsigned long index;
- xa_for_each (&device->compat_devs, index, cdev)
- remove_one_compat_dev(device, index);
- }
- static int add_compat_devs(struct ib_device *device)
- {
- struct rdma_dev_net *rnet;
- unsigned long index;
- int ret = 0;
- lockdep_assert_held(&devices_rwsem);
- down_read(&rdma_nets_rwsem);
- xa_for_each (&rdma_nets, index, rnet) {
- ret = add_one_compat_dev(device, rnet);
- if (ret)
- break;
- }
- up_read(&rdma_nets_rwsem);
- return ret;
- }
- static void remove_all_compat_devs(void)
- {
- struct ib_compat_device *cdev;
- struct ib_device *dev;
- unsigned long index;
- down_read(&devices_rwsem);
- xa_for_each (&devices, index, dev) {
- unsigned long c_index = 0;
- /* Hold nets_rwsem so that any other thread modifying this
- * system param can sync with this thread.
- */
- down_read(&rdma_nets_rwsem);
- xa_for_each (&dev->compat_devs, c_index, cdev)
- remove_one_compat_dev(dev, c_index);
- up_read(&rdma_nets_rwsem);
- }
- up_read(&devices_rwsem);
- }
- static int add_all_compat_devs(void)
- {
- struct rdma_dev_net *rnet;
- struct ib_device *dev;
- unsigned long index;
- int ret = 0;
- down_read(&devices_rwsem);
- xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) {
- unsigned long net_index = 0;
- /* Hold nets_rwsem so that any other thread modifying this
- * system param can sync with this thread.
- */
- down_read(&rdma_nets_rwsem);
- xa_for_each (&rdma_nets, net_index, rnet) {
- ret = add_one_compat_dev(dev, rnet);
- if (ret)
- break;
- }
- up_read(&rdma_nets_rwsem);
- }
- up_read(&devices_rwsem);
- if (ret)
- remove_all_compat_devs();
- return ret;
- }
- int rdma_compatdev_set(u8 enable)
- {
- struct rdma_dev_net *rnet;
- unsigned long index;
- int ret = 0;
- down_write(&rdma_nets_rwsem);
- if (ib_devices_shared_netns == enable) {
- up_write(&rdma_nets_rwsem);
- return 0;
- }
- /* enable/disable of compat devices is not supported
- * when more than default init_net exists.
- */
- xa_for_each (&rdma_nets, index, rnet) {
- ret++;
- break;
- }
- if (!ret)
- ib_devices_shared_netns = enable;
- up_write(&rdma_nets_rwsem);
- if (ret)
- return -EBUSY;
- if (enable)
- ret = add_all_compat_devs();
- else
- remove_all_compat_devs();
- return ret;
- }
- static void rdma_dev_exit_net(struct net *net)
- {
- struct rdma_dev_net *rnet = rdma_net_to_dev_net(net);
- struct ib_device *dev;
- unsigned long index;
- int ret;
- down_write(&rdma_nets_rwsem);
- /*
- * Prevent the ID from being re-used and hide the id from xa_for_each.
- */
- ret = xa_err(xa_store(&rdma_nets, rnet->id, NULL, GFP_KERNEL));
- WARN_ON(ret);
- up_write(&rdma_nets_rwsem);
- down_read(&devices_rwsem);
- xa_for_each (&devices, index, dev) {
- get_device(&dev->dev);
- /*
- * Release the devices_rwsem so that pontentially blocking
- * device_del, doesn't hold the devices_rwsem for too long.
- */
- up_read(&devices_rwsem);
- remove_one_compat_dev(dev, rnet->id);
- /*
- * If the real device is in the NS then move it back to init.
- */
- rdma_dev_change_netns(dev, net, &init_net);
- put_device(&dev->dev);
- down_read(&devices_rwsem);
- }
- up_read(&devices_rwsem);
- rdma_nl_net_exit(rnet);
- xa_erase(&rdma_nets, rnet->id);
- }
- static __net_init int rdma_dev_init_net(struct net *net)
- {
- struct rdma_dev_net *rnet = rdma_net_to_dev_net(net);
- unsigned long index;
- struct ib_device *dev;
- int ret;
- write_pnet(&rnet->net, net);
- ret = rdma_nl_net_init(rnet);
- if (ret)
- return ret;
- /* No need to create any compat devices in default init_net. */
- if (net_eq(net, &init_net))
- return 0;
- ret = xa_alloc(&rdma_nets, &rnet->id, rnet, xa_limit_32b, GFP_KERNEL);
- if (ret) {
- rdma_nl_net_exit(rnet);
- return ret;
- }
- down_read(&devices_rwsem);
- xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) {
- /* Hold nets_rwsem so that netlink command cannot change
- * system configuration for device sharing mode.
- */
- down_read(&rdma_nets_rwsem);
- ret = add_one_compat_dev(dev, rnet);
- up_read(&rdma_nets_rwsem);
- if (ret)
- break;
- }
- up_read(&devices_rwsem);
- if (ret)
- rdma_dev_exit_net(net);
- return ret;
- }
- /*
- * Assign the unique string device name and the unique device index. This is
- * undone by ib_dealloc_device.
- */
- static int assign_name(struct ib_device *device, const char *name)
- {
- static u32 last_id;
- int ret;
- down_write(&devices_rwsem);
- /* Assign a unique name to the device */
- if (strchr(name, '%'))
- ret = alloc_name(device, name);
- else
- ret = dev_set_name(&device->dev, name);
- if (ret)
- goto out;
- if (__ib_device_get_by_name(dev_name(&device->dev))) {
- ret = -ENFILE;
- goto out;
- }
- strlcpy(device->name, dev_name(&device->dev), IB_DEVICE_NAME_MAX);
- ret = xa_alloc_cyclic(&devices, &device->index, device, xa_limit_31b,
- &last_id, GFP_KERNEL);
- if (ret > 0)
- ret = 0;
- out:
- up_write(&devices_rwsem);
- return ret;
- }
- /*
- * setup_device() allocates memory and sets up data that requires calling the
- * device ops, this is the only reason these actions are not done during
- * ib_alloc_device. It is undone by ib_dealloc_device().
- */
- static int setup_device(struct ib_device *device)
- {
- struct ib_udata uhw = {.outlen = 0, .inlen = 0};
- int ret;
- ib_device_check_mandatory(device);
- ret = setup_port_data(device);
- if (ret) {
- dev_warn(&device->dev, "Couldn't create per-port data\n");
- return ret;
- }
- memset(&device->attrs, 0, sizeof(device->attrs));
- ret = device->ops.query_device(device, &device->attrs, &uhw);
- if (ret) {
- dev_warn(&device->dev,
- "Couldn't query the device attributes\n");
- return ret;
- }
- return 0;
- }
- static void disable_device(struct ib_device *device)
- {
- u32 cid;
- WARN_ON(!refcount_read(&device->refcount));
- down_write(&devices_rwsem);
- xa_clear_mark(&devices, device->index, DEVICE_REGISTERED);
- up_write(&devices_rwsem);
- /*
- * Remove clients in LIFO order, see assign_client_id. This could be
- * more efficient if xarray learns to reverse iterate. Since no new
- * clients can be added to this ib_device past this point we only need
- * the maximum possible client_id value here.
- */
- down_read(&clients_rwsem);
- cid = highest_client_id;
- up_read(&clients_rwsem);
- while (cid) {
- cid--;
- remove_client_context(device, cid);
- }
- ib_cq_pool_destroy(device);
- /* Pairs with refcount_set in enable_device */
- ib_device_put(device);
- wait_for_completion(&device->unreg_completion);
- /*
- * compat devices must be removed after device refcount drops to zero.
- * Otherwise init_net() may add more compatdevs after removing compat
- * devices and before device is disabled.
- */
- remove_compat_devs(device);
- }
- /*
- * An enabled device is visible to all clients and to all the public facing
- * APIs that return a device pointer. This always returns with a new get, even
- * if it fails.
- */
- static int enable_device_and_get(struct ib_device *device)
- {
- struct ib_client *client;
- unsigned long index;
- int ret = 0;
- /*
- * One ref belongs to the xa and the other belongs to this
- * thread. This is needed to guard against parallel unregistration.
- */
- refcount_set(&device->refcount, 2);
- down_write(&devices_rwsem);
- xa_set_mark(&devices, device->index, DEVICE_REGISTERED);
- /*
- * By using downgrade_write() we ensure that no other thread can clear
- * DEVICE_REGISTERED while we are completing the client setup.
- */
- downgrade_write(&devices_rwsem);
- if (device->ops.enable_driver) {
- ret = device->ops.enable_driver(device);
- if (ret)
- goto out;
- }
- ib_cq_pool_init(device);
- down_read(&clients_rwsem);
- xa_for_each_marked (&clients, index, client, CLIENT_REGISTERED) {
- ret = add_client_context(device, client);
- if (ret)
- break;
- }
- up_read(&clients_rwsem);
- if (!ret)
- ret = add_compat_devs(device);
- out:
- up_read(&devices_rwsem);
- return ret;
- }
- static void prevent_dealloc_device(struct ib_device *ib_dev)
- {
- }
- /**
- * ib_register_device - Register an IB device with IB core
- * @device: Device to register
- * @name: unique string device name. This may include a '%' which will
- * cause a unique index to be added to the passed device name.
- * @dma_device: pointer to a DMA-capable device. If %NULL, then the IB
- * device will be used. In this case the caller should fully
- * setup the ibdev for DMA. This usually means using dma_virt_ops.
- *
- * Low-level drivers use ib_register_device() to register their
- * devices with the IB core. All registered clients will receive a
- * callback for each device that is added. @device must be allocated
- * with ib_alloc_device().
- *
- * If the driver uses ops.dealloc_driver and calls any ib_unregister_device()
- * asynchronously then the device pointer may become freed as soon as this
- * function returns.
- */
- int ib_register_device(struct ib_device *device, const char *name,
- struct device *dma_device)
- {
- int ret;
- ret = assign_name(device, name);
- if (ret)
- return ret;
- /*
- * If the caller does not provide a DMA capable device then the IB core
- * will set up ib_sge and scatterlist structures that stash the kernel
- * virtual address into the address field.
- */
- WARN_ON(dma_device && !dma_device->dma_parms);
- device->dma_device = dma_device;
- ret = setup_device(device);
- if (ret)
- return ret;
- ret = ib_cache_setup_one(device);
- if (ret) {
- dev_warn(&device->dev,
- "Couldn't set up InfiniBand P_Key/GID cache\n");
- return ret;
- }
- ib_device_register_rdmacg(device);
- rdma_counter_init(device);
- /*
- * Ensure that ADD uevent is not fired because it
- * is too early amd device is not initialized yet.
- */
- dev_set_uevent_suppress(&device->dev, true);
- ret = device_add(&device->dev);
- if (ret)
- goto cg_cleanup;
- ret = ib_device_register_sysfs(device);
- if (ret) {
- dev_warn(&device->dev,
- "Couldn't register device with driver model\n");
- goto dev_cleanup;
- }
- ret = enable_device_and_get(device);
- if (ret) {
- void (*dealloc_fn)(struct ib_device *);
- /*
- * If we hit this error flow then we don't want to
- * automatically dealloc the device since the caller is
- * expected to call ib_dealloc_device() after
- * ib_register_device() fails. This is tricky due to the
- * possibility for a parallel unregistration along with this
- * error flow. Since we have a refcount here we know any
- * parallel flow is stopped in disable_device and will see the
- * special dealloc_driver pointer, causing the responsibility to
- * ib_dealloc_device() to revert back to this thread.
- */
- dealloc_fn = device->ops.dealloc_driver;
- device->ops.dealloc_driver = prevent_dealloc_device;
- ib_device_put(device);
- __ib_unregister_device(device);
- device->ops.dealloc_driver = dealloc_fn;
- dev_set_uevent_suppress(&device->dev, false);
- return ret;
- }
- dev_set_uevent_suppress(&device->dev, false);
- /* Mark for userspace that device is ready */
- kobject_uevent(&device->dev.kobj, KOBJ_ADD);
- ib_device_put(device);
- return 0;
- dev_cleanup:
- device_del(&device->dev);
- cg_cleanup:
- dev_set_uevent_suppress(&device->dev, false);
- ib_device_unregister_rdmacg(device);
- ib_cache_cleanup_one(device);
- return ret;
- }
- EXPORT_SYMBOL(ib_register_device);
- /* Callers must hold a get on the device. */
- static void __ib_unregister_device(struct ib_device *ib_dev)
- {
- /*
- * We have a registration lock so that all the calls to unregister are
- * fully fenced, once any unregister returns the device is truely
- * unregistered even if multiple callers are unregistering it at the
- * same time. This also interacts with the registration flow and
- * provides sane semantics if register and unregister are racing.
- */
- mutex_lock(&ib_dev->unregistration_lock);
- if (!refcount_read(&ib_dev->refcount))
- goto out;
- disable_device(ib_dev);
- /* Expedite removing unregistered pointers from the hash table */
- free_netdevs(ib_dev);
- ib_device_unregister_sysfs(ib_dev);
- device_del(&ib_dev->dev);
- ib_device_unregister_rdmacg(ib_dev);
- ib_cache_cleanup_one(ib_dev);
- /*
- * Drivers using the new flow may not call ib_dealloc_device except
- * in error unwind prior to registration success.
- */
- if (ib_dev->ops.dealloc_driver &&
- ib_dev->ops.dealloc_driver != prevent_dealloc_device) {
- WARN_ON(kref_read(&ib_dev->dev.kobj.kref) <= 1);
- ib_dealloc_device(ib_dev);
- }
- out:
- mutex_unlock(&ib_dev->unregistration_lock);
- }
- /**
- * ib_unregister_device - Unregister an IB device
- * @ib_dev: The device to unregister
- *
- * Unregister an IB device. All clients will receive a remove callback.
- *
- * Callers should call this routine only once, and protect against races with
- * registration. Typically it should only be called as part of a remove
- * callback in an implementation of driver core's struct device_driver and
- * related.
- *
- * If ops.dealloc_driver is used then ib_dev will be freed upon return from
- * this function.
- */
- void ib_unregister_device(struct ib_device *ib_dev)
- {
- get_device(&ib_dev->dev);
- __ib_unregister_device(ib_dev);
- put_device(&ib_dev->dev);
- }
- EXPORT_SYMBOL(ib_unregister_device);
- /**
- * ib_unregister_device_and_put - Unregister a device while holding a 'get'
- * @ib_dev: The device to unregister
- *
- * This is the same as ib_unregister_device(), except it includes an internal
- * ib_device_put() that should match a 'get' obtained by the caller.
- *
- * It is safe to call this routine concurrently from multiple threads while
- * holding the 'get'. When the function returns the device is fully
- * unregistered.
- *
- * Drivers using this flow MUST use the driver_unregister callback to clean up
- * their resources associated with the device and dealloc it.
- */
- void ib_unregister_device_and_put(struct ib_device *ib_dev)
- {
- WARN_ON(!ib_dev->ops.dealloc_driver);
- get_device(&ib_dev->dev);
- ib_device_put(ib_dev);
- __ib_unregister_device(ib_dev);
- put_device(&ib_dev->dev);
- }
- EXPORT_SYMBOL(ib_unregister_device_and_put);
- /**
- * ib_unregister_driver - Unregister all IB devices for a driver
- * @driver_id: The driver to unregister
- *
- * This implements a fence for device unregistration. It only returns once all
- * devices associated with the driver_id have fully completed their
- * unregistration and returned from ib_unregister_device*().
- *
- * If device's are not yet unregistered it goes ahead and starts unregistering
- * them.
- *
- * This does not block creation of new devices with the given driver_id, that
- * is the responsibility of the caller.
- */
- void ib_unregister_driver(enum rdma_driver_id driver_id)
- {
- struct ib_device *ib_dev;
- unsigned long index;
- down_read(&devices_rwsem);
- xa_for_each (&devices, index, ib_dev) {
- if (ib_dev->ops.driver_id != driver_id)
- continue;
- get_device(&ib_dev->dev);
- up_read(&devices_rwsem);
- WARN_ON(!ib_dev->ops.dealloc_driver);
- __ib_unregister_device(ib_dev);
- put_device(&ib_dev->dev);
- down_read(&devices_rwsem);
- }
- up_read(&devices_rwsem);
- }
- EXPORT_SYMBOL(ib_unregister_driver);
- static void ib_unregister_work(struct work_struct *work)
- {
- struct ib_device *ib_dev =
- container_of(work, struct ib_device, unregistration_work);
- __ib_unregister_device(ib_dev);
- put_device(&ib_dev->dev);
- }
- /**
- * ib_unregister_device_queued - Unregister a device using a work queue
- * @ib_dev: The device to unregister
- *
- * This schedules an asynchronous unregistration using a WQ for the device. A
- * driver should use this to avoid holding locks while doing unregistration,
- * such as holding the RTNL lock.
- *
- * Drivers using this API must use ib_unregister_driver before module unload
- * to ensure that all scheduled unregistrations have completed.
- */
- void ib_unregister_device_queued(struct ib_device *ib_dev)
- {
- WARN_ON(!refcount_read(&ib_dev->refcount));
- WARN_ON(!ib_dev->ops.dealloc_driver);
- get_device(&ib_dev->dev);
- if (!queue_work(system_unbound_wq, &ib_dev->unregistration_work))
- put_device(&ib_dev->dev);
- }
- EXPORT_SYMBOL(ib_unregister_device_queued);
- /*
- * The caller must pass in a device that has the kref held and the refcount
- * released. If the device is in cur_net and still registered then it is moved
- * into net.
- */
- static int rdma_dev_change_netns(struct ib_device *device, struct net *cur_net,
- struct net *net)
- {
- int ret2 = -EINVAL;
- int ret;
- mutex_lock(&device->unregistration_lock);
- /*
- * If a device not under ib_device_get() or if the unregistration_lock
- * is not held, the namespace can be changed, or it can be unregistered.
- * Check again under the lock.
- */
- if (refcount_read(&device->refcount) == 0 ||
- !net_eq(cur_net, read_pnet(&device->coredev.rdma_net))) {
- ret = -ENODEV;
- goto out;
- }
- kobject_uevent(&device->dev.kobj, KOBJ_REMOVE);
- disable_device(device);
- /*
- * At this point no one can be using the device, so it is safe to
- * change the namespace.
- */
- write_pnet(&device->coredev.rdma_net, net);
- down_read(&devices_rwsem);
- /*
- * Currently rdma devices are system wide unique. So the device name
- * is guaranteed free in the new namespace. Publish the new namespace
- * at the sysfs level.
- */
- ret = device_rename(&device->dev, dev_name(&device->dev));
- up_read(&devices_rwsem);
- if (ret) {
- dev_warn(&device->dev,
- "%s: Couldn't rename device after namespace change\n",
- __func__);
- /* Try and put things back and re-enable the device */
- write_pnet(&device->coredev.rdma_net, cur_net);
- }
- ret2 = enable_device_and_get(device);
- if (ret2) {
- /*
- * This shouldn't really happen, but if it does, let the user
- * retry at later point. So don't disable the device.
- */
- dev_warn(&device->dev,
- "%s: Couldn't re-enable device after namespace change\n",
- __func__);
- }
- kobject_uevent(&device->dev.kobj, KOBJ_ADD);
- ib_device_put(device);
- out:
- mutex_unlock(&device->unregistration_lock);
- if (ret)
- return ret;
- return ret2;
- }
- int ib_device_set_netns_put(struct sk_buff *skb,
- struct ib_device *dev, u32 ns_fd)
- {
- struct net *net;
- int ret;
- net = get_net_ns_by_fd(ns_fd);
- if (IS_ERR(net)) {
- ret = PTR_ERR(net);
- goto net_err;
- }
- if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
- ret = -EPERM;
- goto ns_err;
- }
- /*
- * Currently supported only for those providers which support
- * disassociation and don't do port specific sysfs init. Once a
- * port_cleanup infrastructure is implemented, this limitation will be
- * removed.
- */
- if (!dev->ops.disassociate_ucontext || dev->ops.init_port ||
- ib_devices_shared_netns) {
- ret = -EOPNOTSUPP;
- goto ns_err;
- }
- get_device(&dev->dev);
- ib_device_put(dev);
- ret = rdma_dev_change_netns(dev, current->nsproxy->net_ns, net);
- put_device(&dev->dev);
- put_net(net);
- return ret;
- ns_err:
- put_net(net);
- net_err:
- ib_device_put(dev);
- return ret;
- }
- static struct pernet_operations rdma_dev_net_ops = {
- .init = rdma_dev_init_net,
- .exit = rdma_dev_exit_net,
- .id = &rdma_dev_net_id,
- .size = sizeof(struct rdma_dev_net),
- };
- static int assign_client_id(struct ib_client *client)
- {
- int ret;
- down_write(&clients_rwsem);
- /*
- * The add/remove callbacks must be called in FIFO/LIFO order. To
- * achieve this we assign client_ids so they are sorted in
- * registration order.
- */
- client->client_id = highest_client_id;
- ret = xa_insert(&clients, client->client_id, client, GFP_KERNEL);
- if (ret)
- goto out;
- highest_client_id++;
- xa_set_mark(&clients, client->client_id, CLIENT_REGISTERED);
- out:
- up_write(&clients_rwsem);
- return ret;
- }
- static void remove_client_id(struct ib_client *client)
- {
- down_write(&clients_rwsem);
- xa_erase(&clients, client->client_id);
- for (; highest_client_id; highest_client_id--)
- if (xa_load(&clients, highest_client_id - 1))
- break;
- up_write(&clients_rwsem);
- }
- /**
- * ib_register_client - Register an IB client
- * @client:Client to register
- *
- * Upper level users of the IB drivers can use ib_register_client() to
- * register callbacks for IB device addition and removal. When an IB
- * device is added, each registered client's add method will be called
- * (in the order the clients were registered), and when a device is
- * removed, each client's remove method will be called (in the reverse
- * order that clients were registered). In addition, when
- * ib_register_client() is called, the client will receive an add
- * callback for all devices already registered.
- */
- int ib_register_client(struct ib_client *client)
- {
- struct ib_device *device;
- unsigned long index;
- int ret;
- refcount_set(&client->uses, 1);
- init_completion(&client->uses_zero);
- ret = assign_client_id(client);
- if (ret)
- return ret;
- down_read(&devices_rwsem);
- xa_for_each_marked (&devices, index, device, DEVICE_REGISTERED) {
- ret = add_client_context(device, client);
- if (ret) {
- up_read(&devices_rwsem);
- ib_unregister_client(client);
- return ret;
- }
- }
- up_read(&devices_rwsem);
- return 0;
- }
- EXPORT_SYMBOL(ib_register_client);
- /**
- * ib_unregister_client - Unregister an IB client
- * @client:Client to unregister
- *
- * Upper level users use ib_unregister_client() to remove their client
- * registration. When ib_unregister_client() is called, the client
- * will receive a remove callback for each IB device still registered.
- *
- * This is a full fence, once it returns no client callbacks will be called,
- * or are running in another thread.
- */
- void ib_unregister_client(struct ib_client *client)
- {
- struct ib_device *device;
- unsigned long index;
- down_write(&clients_rwsem);
- ib_client_put(client);
- xa_clear_mark(&clients, client->client_id, CLIENT_REGISTERED);
- up_write(&clients_rwsem);
- /* We do not want to have locks while calling client->remove() */
- rcu_read_lock();
- xa_for_each (&devices, index, device) {
- if (!ib_device_try_get(device))
- continue;
- rcu_read_unlock();
- remove_client_context(device, client->client_id);
- ib_device_put(device);
- rcu_read_lock();
- }
- rcu_read_unlock();
- /*
- * remove_client_context() is not a fence, it can return even though a
- * removal is ongoing. Wait until all removals are completed.
- */
- wait_for_completion(&client->uses_zero);
- remove_client_id(client);
- }
- EXPORT_SYMBOL(ib_unregister_client);
- static int __ib_get_global_client_nl_info(const char *client_name,
- struct ib_client_nl_info *res)
- {
- struct ib_client *client;
- unsigned long index;
- int ret = -ENOENT;
- down_read(&clients_rwsem);
- xa_for_each_marked (&clients, index, client, CLIENT_REGISTERED) {
- if (strcmp(client->name, client_name) != 0)
- continue;
- if (!client->get_global_nl_info) {
- ret = -EOPNOTSUPP;
- break;
- }
- ret = client->get_global_nl_info(res);
- if (WARN_ON(ret == -ENOENT))
- ret = -EINVAL;
- if (!ret && res->cdev)
- get_device(res->cdev);
- break;
- }
- up_read(&clients_rwsem);
- return ret;
- }
- static int __ib_get_client_nl_info(struct ib_device *ibdev,
- const char *client_name,
- struct ib_client_nl_info *res)
- {
- unsigned long index;
- void *client_data;
- int ret = -ENOENT;
- down_read(&ibdev->client_data_rwsem);
- xan_for_each_marked (&ibdev->client_data, index, client_data,
- CLIENT_DATA_REGISTERED) {
- struct ib_client *client = xa_load(&clients, index);
- if (!client || strcmp(client->name, client_name) != 0)
- continue;
- if (!client->get_nl_info) {
- ret = -EOPNOTSUPP;
- break;
- }
- ret = client->get_nl_info(ibdev, client_data, res);
- if (WARN_ON(ret == -ENOENT))
- ret = -EINVAL;
- /*
- * The cdev is guaranteed valid as long as we are inside the
- * client_data_rwsem as remove_one can't be called. Keep it
- * valid for the caller.
- */
- if (!ret && res->cdev)
- get_device(res->cdev);
- break;
- }
- up_read(&ibdev->client_data_rwsem);
- return ret;
- }
- /**
- * ib_get_client_nl_info - Fetch the nl_info from a client
- * @device - IB device
- * @client_name - Name of the client
- * @res - Result of the query
- */
- int ib_get_client_nl_info(struct ib_device *ibdev, const char *client_name,
- struct ib_client_nl_info *res)
- {
- int ret;
- if (ibdev)
- ret = __ib_get_client_nl_info(ibdev, client_name, res);
- else
- ret = __ib_get_global_client_nl_info(client_name, res);
- #ifdef CONFIG_MODULES
- if (ret == -ENOENT) {
- request_module("rdma-client-%s", client_name);
- if (ibdev)
- ret = __ib_get_client_nl_info(ibdev, client_name, res);
- else
- ret = __ib_get_global_client_nl_info(client_name, res);
- }
- #endif
- if (ret) {
- if (ret == -ENOENT)
- return -EOPNOTSUPP;
- return ret;
- }
- if (WARN_ON(!res->cdev))
- return -EINVAL;
- return 0;
- }
- /**
- * ib_set_client_data - Set IB client context
- * @device:Device to set context for
- * @client:Client to set context for
- * @data:Context to set
- *
- * ib_set_client_data() sets client context data that can be retrieved with
- * ib_get_client_data(). This can only be called while the client is
- * registered to the device, once the ib_client remove() callback returns this
- * cannot be called.
- */
- void ib_set_client_data(struct ib_device *device, struct ib_client *client,
- void *data)
- {
- void *rc;
- if (WARN_ON(IS_ERR(data)))
- data = NULL;
- rc = xa_store(&device->client_data, client->client_id, data,
- GFP_KERNEL);
- WARN_ON(xa_is_err(rc));
- }
- EXPORT_SYMBOL(ib_set_client_data);
- /**
- * ib_register_event_handler - Register an IB event handler
- * @event_handler:Handler to register
- *
- * ib_register_event_handler() registers an event handler that will be
- * called back when asynchronous IB events occur (as defined in
- * chapter 11 of the InfiniBand Architecture Specification). This
- * callback occurs in workqueue context.
- */
- void ib_register_event_handler(struct ib_event_handler *event_handler)
- {
- down_write(&event_handler->device->event_handler_rwsem);
- list_add_tail(&event_handler->list,
- &event_handler->device->event_handler_list);
- up_write(&event_handler->device->event_handler_rwsem);
- }
- EXPORT_SYMBOL(ib_register_event_handler);
- /**
- * ib_unregister_event_handler - Unregister an event handler
- * @event_handler:Handler to unregister
- *
- * Unregister an event handler registered with
- * ib_register_event_handler().
- */
- void ib_unregister_event_handler(struct ib_event_handler *event_handler)
- {
- down_write(&event_handler->device->event_handler_rwsem);
- list_del(&event_handler->list);
- up_write(&event_handler->device->event_handler_rwsem);
- }
- EXPORT_SYMBOL(ib_unregister_event_handler);
- void ib_dispatch_event_clients(struct ib_event *event)
- {
- struct ib_event_handler *handler;
- down_read(&event->device->event_handler_rwsem);
- list_for_each_entry(handler, &event->device->event_handler_list, list)
- handler->handler(handler, event);
- up_read(&event->device->event_handler_rwsem);
- }
- static int iw_query_port(struct ib_device *device,
- u8 port_num,
- struct ib_port_attr *port_attr)
- {
- struct in_device *inetdev;
- struct net_device *netdev;
- memset(port_attr, 0, sizeof(*port_attr));
- netdev = ib_device_get_netdev(device, port_num);
- if (!netdev)
- return -ENODEV;
- port_attr->max_mtu = IB_MTU_4096;
- port_attr->active_mtu = ib_mtu_int_to_enum(netdev->mtu);
- if (!netif_carrier_ok(netdev)) {
- port_attr->state = IB_PORT_DOWN;
- port_attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
- } else {
- rcu_read_lock();
- inetdev = __in_dev_get_rcu(netdev);
- if (inetdev && inetdev->ifa_list) {
- port_attr->state = IB_PORT_ACTIVE;
- port_attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
- } else {
- port_attr->state = IB_PORT_INIT;
- port_attr->phys_state =
- IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING;
- }
- rcu_read_unlock();
- }
- dev_put(netdev);
- return device->ops.query_port(device, port_num, port_attr);
- }
- static int __ib_query_port(struct ib_device *device,
- u8 port_num,
- struct ib_port_attr *port_attr)
- {
- union ib_gid gid = {};
- int err;
- memset(port_attr, 0, sizeof(*port_attr));
- err = device->ops.query_port(device, port_num, port_attr);
- if (err || port_attr->subnet_prefix)
- return err;
- if (rdma_port_get_link_layer(device, port_num) !=
- IB_LINK_LAYER_INFINIBAND)
- return 0;
- err = device->ops.query_gid(device, port_num, 0, &gid);
- if (err)
- return err;
- port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix);
- return 0;
- }
- /**
- * ib_query_port - Query IB port attributes
- * @device:Device to query
- * @port_num:Port number to query
- * @port_attr:Port attributes
- *
- * ib_query_port() returns the attributes of a port through the
- * @port_attr pointer.
- */
- int ib_query_port(struct ib_device *device,
- u8 port_num,
- struct ib_port_attr *port_attr)
- {
- if (!rdma_is_port_valid(device, port_num))
- return -EINVAL;
- if (rdma_protocol_iwarp(device, port_num))
- return iw_query_port(device, port_num, port_attr);
- else
- return __ib_query_port(device, port_num, port_attr);
- }
- EXPORT_SYMBOL(ib_query_port);
- static void add_ndev_hash(struct ib_port_data *pdata)
- {
- unsigned long flags;
- might_sleep();
- spin_lock_irqsave(&ndev_hash_lock, flags);
- if (hash_hashed(&pdata->ndev_hash_link)) {
- hash_del_rcu(&pdata->ndev_hash_link);
- spin_unlock_irqrestore(&ndev_hash_lock, flags);
- /*
- * We cannot do hash_add_rcu after a hash_del_rcu until the
- * grace period
- */
- synchronize_rcu();
- spin_lock_irqsave(&ndev_hash_lock, flags);
- }
- if (pdata->netdev)
- hash_add_rcu(ndev_hash, &pdata->ndev_hash_link,
- (uintptr_t)pdata->netdev);
- spin_unlock_irqrestore(&ndev_hash_lock, flags);
- }
- /**
- * ib_device_set_netdev - Associate the ib_dev with an underlying net_device
- * @ib_dev: Device to modify
- * @ndev: net_device to affiliate, may be NULL
- * @port: IB port the net_device is connected to
- *
- * Drivers should use this to link the ib_device to a netdev so the netdev
- * shows up in interfaces like ib_enum_roce_netdev. Only one netdev may be
- * affiliated with any port.
- *
- * The caller must ensure that the given ndev is not unregistered or
- * unregistering, and that either the ib_device is unregistered or
- * ib_device_set_netdev() is called with NULL when the ndev sends a
- * NETDEV_UNREGISTER event.
- */
- int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev,
- unsigned int port)
- {
- struct net_device *old_ndev;
- struct ib_port_data *pdata;
- unsigned long flags;
- int ret;
- /*
- * Drivers wish to call this before ib_register_driver, so we have to
- * setup the port data early.
- */
- ret = alloc_port_data(ib_dev);
- if (ret)
- return ret;
- if (!rdma_is_port_valid(ib_dev, port))
- return -EINVAL;
- pdata = &ib_dev->port_data[port];
- spin_lock_irqsave(&pdata->netdev_lock, flags);
- old_ndev = rcu_dereference_protected(
- pdata->netdev, lockdep_is_held(&pdata->netdev_lock));
- if (old_ndev == ndev) {
- spin_unlock_irqrestore(&pdata->netdev_lock, flags);
- return 0;
- }
- if (ndev)
- dev_hold(ndev);
- rcu_assign_pointer(pdata->netdev, ndev);
- spin_unlock_irqrestore(&pdata->netdev_lock, flags);
- add_ndev_hash(pdata);
- if (old_ndev)
- dev_put(old_ndev);
- return 0;
- }
- EXPORT_SYMBOL(ib_device_set_netdev);
- static void free_netdevs(struct ib_device *ib_dev)
- {
- unsigned long flags;
- unsigned int port;
- if (!ib_dev->port_data)
- return;
- rdma_for_each_port (ib_dev, port) {
- struct ib_port_data *pdata = &ib_dev->port_data[port];
- struct net_device *ndev;
- spin_lock_irqsave(&pdata->netdev_lock, flags);
- ndev = rcu_dereference_protected(
- pdata->netdev, lockdep_is_held(&pdata->netdev_lock));
- if (ndev) {
- spin_lock(&ndev_hash_lock);
- hash_del_rcu(&pdata->ndev_hash_link);
- spin_unlock(&ndev_hash_lock);
- /*
- * If this is the last dev_put there is still a
- * synchronize_rcu before the netdev is kfreed, so we
- * can continue to rely on unlocked pointer
- * comparisons after the put
- */
- rcu_assign_pointer(pdata->netdev, NULL);
- dev_put(ndev);
- }
- spin_unlock_irqrestore(&pdata->netdev_lock, flags);
- }
- }
- struct net_device *ib_device_get_netdev(struct ib_device *ib_dev,
- unsigned int port)
- {
- struct ib_port_data *pdata;
- struct net_device *res;
- if (!rdma_is_port_valid(ib_dev, port))
- return NULL;
- pdata = &ib_dev->port_data[port];
- /*
- * New drivers should use ib_device_set_netdev() not the legacy
- * get_netdev().
- */
- if (ib_dev->ops.get_netdev)
- res = ib_dev->ops.get_netdev(ib_dev, port);
- else {
- spin_lock(&pdata->netdev_lock);
- res = rcu_dereference_protected(
- pdata->netdev, lockdep_is_held(&pdata->netdev_lock));
- if (res)
- dev_hold(res);
- spin_unlock(&pdata->netdev_lock);
- }
- /*
- * If we are starting to unregister expedite things by preventing
- * propagation of an unregistering netdev.
- */
- if (res && res->reg_state != NETREG_REGISTERED) {
- dev_put(res);
- return NULL;
- }
- return res;
- }
- /**
- * ib_device_get_by_netdev - Find an IB device associated with a netdev
- * @ndev: netdev to locate
- * @driver_id: The driver ID that must match (RDMA_DRIVER_UNKNOWN matches all)
- *
- * Find and hold an ib_device that is associated with a netdev via
- * ib_device_set_netdev(). The caller must call ib_device_put() on the
- * returned pointer.
- */
- struct ib_device *ib_device_get_by_netdev(struct net_device *ndev,
- enum rdma_driver_id driver_id)
- {
- struct ib_device *res = NULL;
- struct ib_port_data *cur;
- rcu_read_lock();
- hash_for_each_possible_rcu (ndev_hash, cur, ndev_hash_link,
- (uintptr_t)ndev) {
- if (rcu_access_pointer(cur->netdev) == ndev &&
- (driver_id == RDMA_DRIVER_UNKNOWN ||
- cur->ib_dev->ops.driver_id == driver_id) &&
- ib_device_try_get(cur->ib_dev)) {
- res = cur->ib_dev;
- break;
- }
- }
- rcu_read_unlock();
- return res;
- }
- EXPORT_SYMBOL(ib_device_get_by_netdev);
- /**
- * ib_enum_roce_netdev - enumerate all RoCE ports
- * @ib_dev : IB device we want to query
- * @filter: Should we call the callback?
- * @filter_cookie: Cookie passed to filter
- * @cb: Callback to call for each found RoCE ports
- * @cookie: Cookie passed back to the callback
- *
- * Enumerates all of the physical RoCE ports of ib_dev
- * which are related to netdevice and calls callback() on each
- * device for which filter() function returns non zero.
- */
- void ib_enum_roce_netdev(struct ib_device *ib_dev,
- roce_netdev_filter filter,
- void *filter_cookie,
- roce_netdev_callback cb,
- void *cookie)
- {
- unsigned int port;
- rdma_for_each_port (ib_dev, port)
- if (rdma_protocol_roce(ib_dev, port)) {
- struct net_device *idev =
- ib_device_get_netdev(ib_dev, port);
- if (filter(ib_dev, port, idev, filter_cookie))
- cb(ib_dev, port, idev, cookie);
- if (idev)
- dev_put(idev);
- }
- }
- /**
- * ib_enum_all_roce_netdevs - enumerate all RoCE devices
- * @filter: Should we call the callback?
- * @filter_cookie: Cookie passed to filter
- * @cb: Callback to call for each found RoCE ports
- * @cookie: Cookie passed back to the callback
- *
- * Enumerates all RoCE devices' physical ports which are related
- * to netdevices and calls callback() on each device for which
- * filter() function returns non zero.
- */
- void ib_enum_all_roce_netdevs(roce_netdev_filter filter,
- void *filter_cookie,
- roce_netdev_callback cb,
- void *cookie)
- {
- struct ib_device *dev;
- unsigned long index;
- down_read(&devices_rwsem);
- xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED)
- ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie);
- up_read(&devices_rwsem);
- }
- /**
- * ib_enum_all_devs - enumerate all ib_devices
- * @cb: Callback to call for each found ib_device
- *
- * Enumerates all ib_devices and calls callback() on each device.
- */
- int ib_enum_all_devs(nldev_callback nldev_cb, struct sk_buff *skb,
- struct netlink_callback *cb)
- {
- unsigned long index;
- struct ib_device *dev;
- unsigned int idx = 0;
- int ret = 0;
- down_read(&devices_rwsem);
- xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) {
- if (!rdma_dev_access_netns(dev, sock_net(skb->sk)))
- continue;
- ret = nldev_cb(dev, skb, cb, idx);
- if (ret)
- break;
- idx++;
- }
- up_read(&devices_rwsem);
- return ret;
- }
- /**
- * ib_query_pkey - Get P_Key table entry
- * @device:Device to query
- * @port_num:Port number to query
- * @index:P_Key table index to query
- * @pkey:Returned P_Key
- *
- * ib_query_pkey() fetches the specified P_Key table entry.
- */
- int ib_query_pkey(struct ib_device *device,
- u8 port_num, u16 index, u16 *pkey)
- {
- if (!rdma_is_port_valid(device, port_num))
- return -EINVAL;
- if (!device->ops.query_pkey)
- return -EOPNOTSUPP;
- return device->ops.query_pkey(device, port_num, index, pkey);
- }
- EXPORT_SYMBOL(ib_query_pkey);
- /**
- * ib_modify_device - Change IB device attributes
- * @device:Device to modify
- * @device_modify_mask:Mask of attributes to change
- * @device_modify:New attribute values
- *
- * ib_modify_device() changes a device's attributes as specified by
- * the @device_modify_mask and @device_modify structure.
- */
- int ib_modify_device(struct ib_device *device,
- int device_modify_mask,
- struct ib_device_modify *device_modify)
- {
- if (!device->ops.modify_device)
- return -EOPNOTSUPP;
- return device->ops.modify_device(device, device_modify_mask,
- device_modify);
- }
- EXPORT_SYMBOL(ib_modify_device);
- /**
- * ib_modify_port - Modifies the attributes for the specified port.
- * @device: The device to modify.
- * @port_num: The number of the port to modify.
- * @port_modify_mask: Mask used to specify which attributes of the port
- * to change.
- * @port_modify: New attribute values for the port.
- *
- * ib_modify_port() changes a port's attributes as specified by the
- * @port_modify_mask and @port_modify structure.
- */
- int ib_modify_port(struct ib_device *device,
- u8 port_num, int port_modify_mask,
- struct ib_port_modify *port_modify)
- {
- int rc;
- if (!rdma_is_port_valid(device, port_num))
- return -EINVAL;
- if (device->ops.modify_port)
- rc = device->ops.modify_port(device, port_num,
- port_modify_mask,
- port_modify);
- else if (rdma_protocol_roce(device, port_num) &&
- ((port_modify->set_port_cap_mask & ~IB_PORT_CM_SUP) == 0 ||
- (port_modify->clr_port_cap_mask & ~IB_PORT_CM_SUP) == 0))
- rc = 0;
- else
- rc = -EOPNOTSUPP;
- return rc;
- }
- EXPORT_SYMBOL(ib_modify_port);
- /**
- * ib_find_gid - Returns the port number and GID table index where
- * a specified GID value occurs. Its searches only for IB link layer.
- * @device: The device to query.
- * @gid: The GID value to search for.
- * @port_num: The port number of the device where the GID value was found.
- * @index: The index into the GID table where the GID was found. This
- * parameter may be NULL.
- */
- int ib_find_gid(struct ib_device *device, union ib_gid *gid,
- u8 *port_num, u16 *index)
- {
- union ib_gid tmp_gid;
- unsigned int port;
- int ret, i;
- rdma_for_each_port (device, port) {
- if (!rdma_protocol_ib(device, port))
- continue;
- for (i = 0; i < device->port_data[port].immutable.gid_tbl_len;
- ++i) {
- ret = rdma_query_gid(device, port, i, &tmp_gid);
- if (ret)
- continue;
- if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
- *port_num = port;
- if (index)
- *index = i;
- return 0;
- }
- }
- }
- return -ENOENT;
- }
- EXPORT_SYMBOL(ib_find_gid);
- /**
- * ib_find_pkey - Returns the PKey table index where a specified
- * PKey value occurs.
- * @device: The device to query.
- * @port_num: The port number of the device to search for the PKey.
- * @pkey: The PKey value to search for.
- * @index: The index into the PKey table where the PKey was found.
- */
- int ib_find_pkey(struct ib_device *device,
- u8 port_num, u16 pkey, u16 *index)
- {
- int ret, i;
- u16 tmp_pkey;
- int partial_ix = -1;
- for (i = 0; i < device->port_data[port_num].immutable.pkey_tbl_len;
- ++i) {
- ret = ib_query_pkey(device, port_num, i, &tmp_pkey);
- if (ret)
- return ret;
- if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) {
- /* if there is full-member pkey take it.*/
- if (tmp_pkey & 0x8000) {
- *index = i;
- return 0;
- }
- if (partial_ix < 0)
- partial_ix = i;
- }
- }
- /*no full-member, if exists take the limited*/
- if (partial_ix >= 0) {
- *index = partial_ix;
- return 0;
- }
- return -ENOENT;
- }
- EXPORT_SYMBOL(ib_find_pkey);
- /**
- * ib_get_net_dev_by_params() - Return the appropriate net_dev
- * for a received CM request
- * @dev: An RDMA device on which the request has been received.
- * @port: Port number on the RDMA device.
- * @pkey: The Pkey the request came on.
- * @gid: A GID that the net_dev uses to communicate.
- * @addr: Contains the IP address that the request specified as its
- * destination.
- *
- */
- struct net_device *ib_get_net_dev_by_params(struct ib_device *dev,
- u8 port,
- u16 pkey,
- const union ib_gid *gid,
- const struct sockaddr *addr)
- {
- struct net_device *net_dev = NULL;
- unsigned long index;
- void *client_data;
- if (!rdma_protocol_ib(dev, port))
- return NULL;
- /*
- * Holding the read side guarantees that the client will not become
- * unregistered while we are calling get_net_dev_by_params()
- */
- down_read(&dev->client_data_rwsem);
- xan_for_each_marked (&dev->client_data, index, client_data,
- CLIENT_DATA_REGISTERED) {
- struct ib_client *client = xa_load(&clients, index);
- if (!client || !client->get_net_dev_by_params)
- continue;
- net_dev = client->get_net_dev_by_params(dev, port, pkey, gid,
- addr, client_data);
- if (net_dev)
- break;
- }
- up_read(&dev->client_data_rwsem);
- return net_dev;
- }
- EXPORT_SYMBOL(ib_get_net_dev_by_params);
- void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
- {
- struct ib_device_ops *dev_ops = &dev->ops;
- #define SET_DEVICE_OP(ptr, name) \
- do { \
- if (ops->name) \
- if (!((ptr)->name)) \
- (ptr)->name = ops->name; \
- } while (0)
- #define SET_OBJ_SIZE(ptr, name) SET_DEVICE_OP(ptr, size_##name)
- if (ops->driver_id != RDMA_DRIVER_UNKNOWN) {
- WARN_ON(dev_ops->driver_id != RDMA_DRIVER_UNKNOWN &&
- dev_ops->driver_id != ops->driver_id);
- dev_ops->driver_id = ops->driver_id;
- }
- if (ops->owner) {
- WARN_ON(dev_ops->owner && dev_ops->owner != ops->owner);
- dev_ops->owner = ops->owner;
- }
- if (ops->uverbs_abi_ver)
- dev_ops->uverbs_abi_ver = ops->uverbs_abi_ver;
- dev_ops->uverbs_no_driver_id_binding |=
- ops->uverbs_no_driver_id_binding;
- SET_DEVICE_OP(dev_ops, add_gid);
- SET_DEVICE_OP(dev_ops, advise_mr);
- SET_DEVICE_OP(dev_ops, alloc_dm);
- SET_DEVICE_OP(dev_ops, alloc_hw_stats);
- SET_DEVICE_OP(dev_ops, alloc_mr);
- SET_DEVICE_OP(dev_ops, alloc_mr_integrity);
- SET_DEVICE_OP(dev_ops, alloc_mw);
- SET_DEVICE_OP(dev_ops, alloc_pd);
- SET_DEVICE_OP(dev_ops, alloc_rdma_netdev);
- SET_DEVICE_OP(dev_ops, alloc_ucontext);
- SET_DEVICE_OP(dev_ops, alloc_xrcd);
- SET_DEVICE_OP(dev_ops, attach_mcast);
- SET_DEVICE_OP(dev_ops, check_mr_status);
- SET_DEVICE_OP(dev_ops, counter_alloc_stats);
- SET_DEVICE_OP(dev_ops, counter_bind_qp);
- SET_DEVICE_OP(dev_ops, counter_dealloc);
- SET_DEVICE_OP(dev_ops, counter_unbind_qp);
- SET_DEVICE_OP(dev_ops, counter_update_stats);
- SET_DEVICE_OP(dev_ops, create_ah);
- SET_DEVICE_OP(dev_ops, create_counters);
- SET_DEVICE_OP(dev_ops, create_cq);
- SET_DEVICE_OP(dev_ops, create_flow);
- SET_DEVICE_OP(dev_ops, create_flow_action_esp);
- SET_DEVICE_OP(dev_ops, create_qp);
- SET_DEVICE_OP(dev_ops, create_rwq_ind_table);
- SET_DEVICE_OP(dev_ops, create_srq);
- SET_DEVICE_OP(dev_ops, create_wq);
- SET_DEVICE_OP(dev_ops, dealloc_dm);
- SET_DEVICE_OP(dev_ops, dealloc_driver);
- SET_DEVICE_OP(dev_ops, dealloc_mw);
- SET_DEVICE_OP(dev_ops, dealloc_pd);
- SET_DEVICE_OP(dev_ops, dealloc_ucontext);
- SET_DEVICE_OP(dev_ops, dealloc_xrcd);
- SET_DEVICE_OP(dev_ops, del_gid);
- SET_DEVICE_OP(dev_ops, dereg_mr);
- SET_DEVICE_OP(dev_ops, destroy_ah);
- SET_DEVICE_OP(dev_ops, destroy_counters);
- SET_DEVICE_OP(dev_ops, destroy_cq);
- SET_DEVICE_OP(dev_ops, destroy_flow);
- SET_DEVICE_OP(dev_ops, destroy_flow_action);
- SET_DEVICE_OP(dev_ops, destroy_qp);
- SET_DEVICE_OP(dev_ops, destroy_rwq_ind_table);
- SET_DEVICE_OP(dev_ops, destroy_srq);
- SET_DEVICE_OP(dev_ops, destroy_wq);
- SET_DEVICE_OP(dev_ops, detach_mcast);
- SET_DEVICE_OP(dev_ops, disassociate_ucontext);
- SET_DEVICE_OP(dev_ops, drain_rq);
- SET_DEVICE_OP(dev_ops, drain_sq);
- SET_DEVICE_OP(dev_ops, enable_driver);
- SET_DEVICE_OP(dev_ops, fill_res_cm_id_entry);
- SET_DEVICE_OP(dev_ops, fill_res_cq_entry);
- SET_DEVICE_OP(dev_ops, fill_res_cq_entry_raw);
- SET_DEVICE_OP(dev_ops, fill_res_mr_entry);
- SET_DEVICE_OP(dev_ops, fill_res_mr_entry_raw);
- SET_DEVICE_OP(dev_ops, fill_res_qp_entry);
- SET_DEVICE_OP(dev_ops, fill_res_qp_entry_raw);
- SET_DEVICE_OP(dev_ops, fill_stat_mr_entry);
- SET_DEVICE_OP(dev_ops, get_dev_fw_str);
- SET_DEVICE_OP(dev_ops, get_dma_mr);
- SET_DEVICE_OP(dev_ops, get_hw_stats);
- SET_DEVICE_OP(dev_ops, get_link_layer);
- SET_DEVICE_OP(dev_ops, get_netdev);
- SET_DEVICE_OP(dev_ops, get_port_immutable);
- SET_DEVICE_OP(dev_ops, get_vector_affinity);
- SET_DEVICE_OP(dev_ops, get_vf_config);
- SET_DEVICE_OP(dev_ops, get_vf_guid);
- SET_DEVICE_OP(dev_ops, get_vf_stats);
- SET_DEVICE_OP(dev_ops, init_port);
- SET_DEVICE_OP(dev_ops, iw_accept);
- SET_DEVICE_OP(dev_ops, iw_add_ref);
- SET_DEVICE_OP(dev_ops, iw_connect);
- SET_DEVICE_OP(dev_ops, iw_create_listen);
- SET_DEVICE_OP(dev_ops, iw_destroy_listen);
- SET_DEVICE_OP(dev_ops, iw_get_qp);
- SET_DEVICE_OP(dev_ops, iw_reject);
- SET_DEVICE_OP(dev_ops, iw_rem_ref);
- SET_DEVICE_OP(dev_ops, map_mr_sg);
- SET_DEVICE_OP(dev_ops, map_mr_sg_pi);
- SET_DEVICE_OP(dev_ops, mmap);
- SET_DEVICE_OP(dev_ops, mmap_free);
- SET_DEVICE_OP(dev_ops, modify_ah);
- SET_DEVICE_OP(dev_ops, modify_cq);
- SET_DEVICE_OP(dev_ops, modify_device);
- SET_DEVICE_OP(dev_ops, modify_flow_action_esp);
- SET_DEVICE_OP(dev_ops, modify_port);
- SET_DEVICE_OP(dev_ops, modify_qp);
- SET_DEVICE_OP(dev_ops, modify_srq);
- SET_DEVICE_OP(dev_ops, modify_wq);
- SET_DEVICE_OP(dev_ops, peek_cq);
- SET_DEVICE_OP(dev_ops, poll_cq);
- SET_DEVICE_OP(dev_ops, post_recv);
- SET_DEVICE_OP(dev_ops, post_send);
- SET_DEVICE_OP(dev_ops, post_srq_recv);
- SET_DEVICE_OP(dev_ops, process_mad);
- SET_DEVICE_OP(dev_ops, query_ah);
- SET_DEVICE_OP(dev_ops, query_device);
- SET_DEVICE_OP(dev_ops, query_gid);
- SET_DEVICE_OP(dev_ops, query_pkey);
- SET_DEVICE_OP(dev_ops, query_port);
- SET_DEVICE_OP(dev_ops, query_qp);
- SET_DEVICE_OP(dev_ops, query_srq);
- SET_DEVICE_OP(dev_ops, query_ucontext);
- SET_DEVICE_OP(dev_ops, rdma_netdev_get_params);
- SET_DEVICE_OP(dev_ops, read_counters);
- SET_DEVICE_OP(dev_ops, reg_dm_mr);
- SET_DEVICE_OP(dev_ops, reg_user_mr);
- SET_DEVICE_OP(dev_ops, req_ncomp_notif);
- SET_DEVICE_OP(dev_ops, req_notify_cq);
- SET_DEVICE_OP(dev_ops, rereg_user_mr);
- SET_DEVICE_OP(dev_ops, resize_cq);
- SET_DEVICE_OP(dev_ops, set_vf_guid);
- SET_DEVICE_OP(dev_ops, set_vf_link_state);
- SET_OBJ_SIZE(dev_ops, ib_ah);
- SET_OBJ_SIZE(dev_ops, ib_counters);
- SET_OBJ_SIZE(dev_ops, ib_cq);
- SET_OBJ_SIZE(dev_ops, ib_mw);
- SET_OBJ_SIZE(dev_ops, ib_pd);
- SET_OBJ_SIZE(dev_ops, ib_rwq_ind_table);
- SET_OBJ_SIZE(dev_ops, ib_srq);
- SET_OBJ_SIZE(dev_ops, ib_ucontext);
- SET_OBJ_SIZE(dev_ops, ib_xrcd);
- }
- EXPORT_SYMBOL(ib_set_device_ops);
- #ifdef CONFIG_INFINIBAND_VIRT_DMA
- int ib_dma_virt_map_sg(struct ib_device *dev, struct scatterlist *sg, int nents)
- {
- struct scatterlist *s;
- int i;
- for_each_sg(sg, s, nents, i) {
- sg_dma_address(s) = (uintptr_t)sg_virt(s);
- sg_dma_len(s) = s->length;
- }
- return nents;
- }
- EXPORT_SYMBOL(ib_dma_virt_map_sg);
- #endif /* CONFIG_INFINIBAND_VIRT_DMA */
- static const struct rdma_nl_cbs ibnl_ls_cb_table[RDMA_NL_LS_NUM_OPS] = {
- [RDMA_NL_LS_OP_RESOLVE] = {
- .doit = ib_nl_handle_resolve_resp,
- .flags = RDMA_NL_ADMIN_PERM,
- },
- [RDMA_NL_LS_OP_SET_TIMEOUT] = {
- .doit = ib_nl_handle_set_timeout,
- .flags = RDMA_NL_ADMIN_PERM,
- },
- [RDMA_NL_LS_OP_IP_RESOLVE] = {
- .doit = ib_nl_handle_ip_res_resp,
- .flags = RDMA_NL_ADMIN_PERM,
- },
- };
- static int __init ib_core_init(void)
- {
- int ret;
- ib_wq = alloc_workqueue("infiniband", 0, 0);
- if (!ib_wq)
- return -ENOMEM;
- ib_comp_wq = alloc_workqueue("ib-comp-wq",
- WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0);
- if (!ib_comp_wq) {
- ret = -ENOMEM;
- goto err;
- }
- ib_comp_unbound_wq =
- alloc_workqueue("ib-comp-unb-wq",
- WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM |
- WQ_SYSFS, WQ_UNBOUND_MAX_ACTIVE);
- if (!ib_comp_unbound_wq) {
- ret = -ENOMEM;
- goto err_comp;
- }
- ret = class_register(&ib_class);
- if (ret) {
- pr_warn("Couldn't create InfiniBand device class\n");
- goto err_comp_unbound;
- }
- rdma_nl_init();
- ret = addr_init();
- if (ret) {
- pr_warn("Couldn't init IB address resolution\n");
- goto err_ibnl;
- }
- ret = ib_mad_init();
- if (ret) {
- pr_warn("Couldn't init IB MAD\n");
- goto err_addr;
- }
- ret = ib_sa_init();
- if (ret) {
- pr_warn("Couldn't init SA\n");
- goto err_mad;
- }
- ret = register_blocking_lsm_notifier(&ibdev_lsm_nb);
- if (ret) {
- pr_warn("Couldn't register LSM notifier. ret %d\n", ret);
- goto err_sa;
- }
- ret = register_pernet_device(&rdma_dev_net_ops);
- if (ret) {
- pr_warn("Couldn't init compat dev. ret %d\n", ret);
- goto err_compat;
- }
- nldev_init();
- rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table);
- roce_gid_mgmt_init();
- return 0;
- err_compat:
- unregister_blocking_lsm_notifier(&ibdev_lsm_nb);
- err_sa:
- ib_sa_cleanup();
- err_mad:
- ib_mad_cleanup();
- err_addr:
- addr_cleanup();
- err_ibnl:
- class_unregister(&ib_class);
- err_comp_unbound:
- destroy_workqueue(ib_comp_unbound_wq);
- err_comp:
- destroy_workqueue(ib_comp_wq);
- err:
- destroy_workqueue(ib_wq);
- return ret;
- }
- static void __exit ib_core_cleanup(void)
- {
- roce_gid_mgmt_cleanup();
- nldev_exit();
- rdma_nl_unregister(RDMA_NL_LS);
- unregister_pernet_device(&rdma_dev_net_ops);
- unregister_blocking_lsm_notifier(&ibdev_lsm_nb);
- ib_sa_cleanup();
- ib_mad_cleanup();
- addr_cleanup();
- rdma_nl_exit();
- class_unregister(&ib_class);
- destroy_workqueue(ib_comp_unbound_wq);
- destroy_workqueue(ib_comp_wq);
- /* Make sure that any pending umem accounting work is done. */
- destroy_workqueue(ib_wq);
- flush_workqueue(system_unbound_wq);
- WARN_ON(!xa_empty(&clients));
- WARN_ON(!xa_empty(&devices));
- }
- MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4);
- /* ib core relies on netdev stack to first register net_ns_type_operations
- * ns kobject type before ib_core initialization.
- */
- fs_initcall(ib_core_init);
- module_exit(ib_core_cleanup);
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