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906 lines
24 KiB
906 lines
24 KiB
/* |
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* Copyright (c) 2006 Intel Corporation. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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|
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#include <linux/completion.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/err.h> |
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#include <linux/interrupt.h> |
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#include <linux/export.h> |
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#include <linux/slab.h> |
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#include <linux/bitops.h> |
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#include <linux/random.h> |
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|
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#include <rdma/ib_cache.h> |
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#include "sa.h" |
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|
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static int mcast_add_one(struct ib_device *device); |
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static void mcast_remove_one(struct ib_device *device, void *client_data); |
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|
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static struct ib_client mcast_client = { |
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.name = "ib_multicast", |
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.add = mcast_add_one, |
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.remove = mcast_remove_one |
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}; |
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|
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static struct ib_sa_client sa_client; |
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static struct workqueue_struct *mcast_wq; |
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static union ib_gid mgid0; |
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struct mcast_device; |
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|
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struct mcast_port { |
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struct mcast_device *dev; |
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spinlock_t lock; |
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struct rb_root table; |
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atomic_t refcount; |
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struct completion comp; |
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u32 port_num; |
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}; |
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|
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struct mcast_device { |
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struct ib_device *device; |
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struct ib_event_handler event_handler; |
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int start_port; |
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int end_port; |
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struct mcast_port port[]; |
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}; |
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|
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enum mcast_state { |
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MCAST_JOINING, |
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MCAST_MEMBER, |
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MCAST_ERROR, |
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}; |
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|
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enum mcast_group_state { |
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MCAST_IDLE, |
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MCAST_BUSY, |
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MCAST_GROUP_ERROR, |
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MCAST_PKEY_EVENT |
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}; |
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|
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enum { |
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MCAST_INVALID_PKEY_INDEX = 0xFFFF |
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}; |
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struct mcast_member; |
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struct mcast_group { |
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struct ib_sa_mcmember_rec rec; |
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struct rb_node node; |
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struct mcast_port *port; |
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spinlock_t lock; |
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struct work_struct work; |
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struct list_head pending_list; |
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struct list_head active_list; |
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struct mcast_member *last_join; |
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int members[NUM_JOIN_MEMBERSHIP_TYPES]; |
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atomic_t refcount; |
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enum mcast_group_state state; |
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struct ib_sa_query *query; |
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u16 pkey_index; |
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u8 leave_state; |
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int retries; |
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}; |
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struct mcast_member { |
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struct ib_sa_multicast multicast; |
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struct ib_sa_client *client; |
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struct mcast_group *group; |
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struct list_head list; |
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enum mcast_state state; |
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atomic_t refcount; |
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struct completion comp; |
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}; |
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static void join_handler(int status, struct ib_sa_mcmember_rec *rec, |
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void *context); |
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static void leave_handler(int status, struct ib_sa_mcmember_rec *rec, |
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void *context); |
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static struct mcast_group *mcast_find(struct mcast_port *port, |
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union ib_gid *mgid) |
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{ |
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struct rb_node *node = port->table.rb_node; |
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struct mcast_group *group; |
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int ret; |
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|
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while (node) { |
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group = rb_entry(node, struct mcast_group, node); |
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ret = memcmp(mgid->raw, group->rec.mgid.raw, sizeof *mgid); |
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if (!ret) |
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return group; |
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if (ret < 0) |
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node = node->rb_left; |
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else |
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node = node->rb_right; |
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} |
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return NULL; |
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} |
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static struct mcast_group *mcast_insert(struct mcast_port *port, |
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struct mcast_group *group, |
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int allow_duplicates) |
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{ |
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struct rb_node **link = &port->table.rb_node; |
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struct rb_node *parent = NULL; |
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struct mcast_group *cur_group; |
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int ret; |
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while (*link) { |
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parent = *link; |
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cur_group = rb_entry(parent, struct mcast_group, node); |
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ret = memcmp(group->rec.mgid.raw, cur_group->rec.mgid.raw, |
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sizeof group->rec.mgid); |
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if (ret < 0) |
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link = &(*link)->rb_left; |
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else if (ret > 0) |
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link = &(*link)->rb_right; |
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else if (allow_duplicates) |
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link = &(*link)->rb_left; |
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else |
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return cur_group; |
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} |
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rb_link_node(&group->node, parent, link); |
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rb_insert_color(&group->node, &port->table); |
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return NULL; |
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} |
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static void deref_port(struct mcast_port *port) |
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{ |
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if (atomic_dec_and_test(&port->refcount)) |
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complete(&port->comp); |
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} |
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static void release_group(struct mcast_group *group) |
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{ |
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struct mcast_port *port = group->port; |
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unsigned long flags; |
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spin_lock_irqsave(&port->lock, flags); |
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if (atomic_dec_and_test(&group->refcount)) { |
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rb_erase(&group->node, &port->table); |
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spin_unlock_irqrestore(&port->lock, flags); |
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kfree(group); |
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deref_port(port); |
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} else |
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spin_unlock_irqrestore(&port->lock, flags); |
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} |
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static void deref_member(struct mcast_member *member) |
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{ |
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if (atomic_dec_and_test(&member->refcount)) |
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complete(&member->comp); |
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} |
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static void queue_join(struct mcast_member *member) |
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{ |
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struct mcast_group *group = member->group; |
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unsigned long flags; |
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spin_lock_irqsave(&group->lock, flags); |
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list_add_tail(&member->list, &group->pending_list); |
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if (group->state == MCAST_IDLE) { |
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group->state = MCAST_BUSY; |
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atomic_inc(&group->refcount); |
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queue_work(mcast_wq, &group->work); |
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} |
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spin_unlock_irqrestore(&group->lock, flags); |
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} |
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|
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/* |
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* A multicast group has four types of members: full member, non member, |
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* sendonly non member and sendonly full member. |
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* We need to keep track of the number of members of each |
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* type based on their join state. Adjust the number of members the belong to |
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* the specified join states. |
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*/ |
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static void adjust_membership(struct mcast_group *group, u8 join_state, int inc) |
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{ |
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int i; |
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|
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for (i = 0; i < NUM_JOIN_MEMBERSHIP_TYPES; i++, join_state >>= 1) |
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if (join_state & 0x1) |
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group->members[i] += inc; |
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} |
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/* |
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* If a multicast group has zero members left for a particular join state, but |
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* the group is still a member with the SA, we need to leave that join state. |
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* Determine which join states we still belong to, but that do not have any |
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* active members. |
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*/ |
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static u8 get_leave_state(struct mcast_group *group) |
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{ |
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u8 leave_state = 0; |
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int i; |
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for (i = 0; i < NUM_JOIN_MEMBERSHIP_TYPES; i++) |
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if (!group->members[i]) |
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leave_state |= (0x1 << i); |
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return leave_state & group->rec.join_state; |
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} |
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static int check_selector(ib_sa_comp_mask comp_mask, |
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ib_sa_comp_mask selector_mask, |
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ib_sa_comp_mask value_mask, |
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u8 selector, u8 src_value, u8 dst_value) |
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{ |
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int err; |
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if (!(comp_mask & selector_mask) || !(comp_mask & value_mask)) |
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return 0; |
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switch (selector) { |
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case IB_SA_GT: |
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err = (src_value <= dst_value); |
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break; |
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case IB_SA_LT: |
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err = (src_value >= dst_value); |
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break; |
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case IB_SA_EQ: |
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err = (src_value != dst_value); |
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break; |
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default: |
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err = 0; |
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break; |
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} |
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return err; |
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} |
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static int cmp_rec(struct ib_sa_mcmember_rec *src, |
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struct ib_sa_mcmember_rec *dst, ib_sa_comp_mask comp_mask) |
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{ |
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/* MGID must already match */ |
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if (comp_mask & IB_SA_MCMEMBER_REC_PORT_GID && |
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memcmp(&src->port_gid, &dst->port_gid, sizeof src->port_gid)) |
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return -EINVAL; |
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if (comp_mask & IB_SA_MCMEMBER_REC_QKEY && src->qkey != dst->qkey) |
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return -EINVAL; |
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if (comp_mask & IB_SA_MCMEMBER_REC_MLID && src->mlid != dst->mlid) |
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return -EINVAL; |
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if (check_selector(comp_mask, IB_SA_MCMEMBER_REC_MTU_SELECTOR, |
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IB_SA_MCMEMBER_REC_MTU, dst->mtu_selector, |
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src->mtu, dst->mtu)) |
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return -EINVAL; |
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if (comp_mask & IB_SA_MCMEMBER_REC_TRAFFIC_CLASS && |
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src->traffic_class != dst->traffic_class) |
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return -EINVAL; |
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if (comp_mask & IB_SA_MCMEMBER_REC_PKEY && src->pkey != dst->pkey) |
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return -EINVAL; |
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if (check_selector(comp_mask, IB_SA_MCMEMBER_REC_RATE_SELECTOR, |
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IB_SA_MCMEMBER_REC_RATE, dst->rate_selector, |
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src->rate, dst->rate)) |
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return -EINVAL; |
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if (check_selector(comp_mask, |
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IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR, |
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IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME, |
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dst->packet_life_time_selector, |
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src->packet_life_time, dst->packet_life_time)) |
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return -EINVAL; |
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if (comp_mask & IB_SA_MCMEMBER_REC_SL && src->sl != dst->sl) |
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return -EINVAL; |
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if (comp_mask & IB_SA_MCMEMBER_REC_FLOW_LABEL && |
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src->flow_label != dst->flow_label) |
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return -EINVAL; |
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if (comp_mask & IB_SA_MCMEMBER_REC_HOP_LIMIT && |
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src->hop_limit != dst->hop_limit) |
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return -EINVAL; |
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if (comp_mask & IB_SA_MCMEMBER_REC_SCOPE && src->scope != dst->scope) |
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return -EINVAL; |
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/* join_state checked separately, proxy_join ignored */ |
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return 0; |
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} |
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static int send_join(struct mcast_group *group, struct mcast_member *member) |
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{ |
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struct mcast_port *port = group->port; |
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int ret; |
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group->last_join = member; |
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ret = ib_sa_mcmember_rec_query(&sa_client, port->dev->device, |
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port->port_num, IB_MGMT_METHOD_SET, |
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&member->multicast.rec, |
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member->multicast.comp_mask, |
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3000, GFP_KERNEL, join_handler, group, |
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&group->query); |
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return (ret > 0) ? 0 : ret; |
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} |
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static int send_leave(struct mcast_group *group, u8 leave_state) |
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{ |
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struct mcast_port *port = group->port; |
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struct ib_sa_mcmember_rec rec; |
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int ret; |
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rec = group->rec; |
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rec.join_state = leave_state; |
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group->leave_state = leave_state; |
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ret = ib_sa_mcmember_rec_query(&sa_client, port->dev->device, |
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port->port_num, IB_SA_METHOD_DELETE, &rec, |
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IB_SA_MCMEMBER_REC_MGID | |
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IB_SA_MCMEMBER_REC_PORT_GID | |
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IB_SA_MCMEMBER_REC_JOIN_STATE, |
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3000, GFP_KERNEL, leave_handler, |
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group, &group->query); |
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return (ret > 0) ? 0 : ret; |
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} |
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|
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static void join_group(struct mcast_group *group, struct mcast_member *member, |
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u8 join_state) |
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{ |
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member->state = MCAST_MEMBER; |
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adjust_membership(group, join_state, 1); |
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group->rec.join_state |= join_state; |
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member->multicast.rec = group->rec; |
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member->multicast.rec.join_state = join_state; |
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list_move(&member->list, &group->active_list); |
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} |
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|
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static int fail_join(struct mcast_group *group, struct mcast_member *member, |
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int status) |
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{ |
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spin_lock_irq(&group->lock); |
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list_del_init(&member->list); |
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spin_unlock_irq(&group->lock); |
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return member->multicast.callback(status, &member->multicast); |
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} |
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|
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static void process_group_error(struct mcast_group *group) |
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{ |
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struct mcast_member *member; |
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int ret = 0; |
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u16 pkey_index; |
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|
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if (group->state == MCAST_PKEY_EVENT) |
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ret = ib_find_pkey(group->port->dev->device, |
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group->port->port_num, |
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be16_to_cpu(group->rec.pkey), &pkey_index); |
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|
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spin_lock_irq(&group->lock); |
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if (group->state == MCAST_PKEY_EVENT && !ret && |
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group->pkey_index == pkey_index) |
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goto out; |
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|
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while (!list_empty(&group->active_list)) { |
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member = list_entry(group->active_list.next, |
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struct mcast_member, list); |
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atomic_inc(&member->refcount); |
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list_del_init(&member->list); |
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adjust_membership(group, member->multicast.rec.join_state, -1); |
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member->state = MCAST_ERROR; |
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spin_unlock_irq(&group->lock); |
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|
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ret = member->multicast.callback(-ENETRESET, |
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&member->multicast); |
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deref_member(member); |
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if (ret) |
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ib_sa_free_multicast(&member->multicast); |
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spin_lock_irq(&group->lock); |
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} |
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|
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group->rec.join_state = 0; |
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out: |
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group->state = MCAST_BUSY; |
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spin_unlock_irq(&group->lock); |
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} |
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|
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static void mcast_work_handler(struct work_struct *work) |
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{ |
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struct mcast_group *group; |
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struct mcast_member *member; |
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struct ib_sa_multicast *multicast; |
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int status, ret; |
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u8 join_state; |
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|
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group = container_of(work, typeof(*group), work); |
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retest: |
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spin_lock_irq(&group->lock); |
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while (!list_empty(&group->pending_list) || |
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(group->state != MCAST_BUSY)) { |
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|
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if (group->state != MCAST_BUSY) { |
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spin_unlock_irq(&group->lock); |
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process_group_error(group); |
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goto retest; |
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} |
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|
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member = list_entry(group->pending_list.next, |
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struct mcast_member, list); |
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multicast = &member->multicast; |
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join_state = multicast->rec.join_state; |
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atomic_inc(&member->refcount); |
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|
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if (join_state == (group->rec.join_state & join_state)) { |
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status = cmp_rec(&group->rec, &multicast->rec, |
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multicast->comp_mask); |
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if (!status) |
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join_group(group, member, join_state); |
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else |
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list_del_init(&member->list); |
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spin_unlock_irq(&group->lock); |
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ret = multicast->callback(status, multicast); |
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} else { |
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spin_unlock_irq(&group->lock); |
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status = send_join(group, member); |
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if (!status) { |
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deref_member(member); |
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return; |
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} |
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ret = fail_join(group, member, status); |
|
} |
|
|
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deref_member(member); |
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if (ret) |
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ib_sa_free_multicast(&member->multicast); |
|
spin_lock_irq(&group->lock); |
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} |
|
|
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join_state = get_leave_state(group); |
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if (join_state) { |
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group->rec.join_state &= ~join_state; |
|
spin_unlock_irq(&group->lock); |
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if (send_leave(group, join_state)) |
|
goto retest; |
|
} else { |
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group->state = MCAST_IDLE; |
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spin_unlock_irq(&group->lock); |
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release_group(group); |
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} |
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} |
|
|
|
/* |
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* Fail a join request if it is still active - at the head of the pending queue. |
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*/ |
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static void process_join_error(struct mcast_group *group, int status) |
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{ |
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struct mcast_member *member; |
|
int ret; |
|
|
|
spin_lock_irq(&group->lock); |
|
member = list_entry(group->pending_list.next, |
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struct mcast_member, list); |
|
if (group->last_join == member) { |
|
atomic_inc(&member->refcount); |
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list_del_init(&member->list); |
|
spin_unlock_irq(&group->lock); |
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ret = member->multicast.callback(status, &member->multicast); |
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deref_member(member); |
|
if (ret) |
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ib_sa_free_multicast(&member->multicast); |
|
} else |
|
spin_unlock_irq(&group->lock); |
|
} |
|
|
|
static void join_handler(int status, struct ib_sa_mcmember_rec *rec, |
|
void *context) |
|
{ |
|
struct mcast_group *group = context; |
|
u16 pkey_index = MCAST_INVALID_PKEY_INDEX; |
|
|
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if (status) |
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process_join_error(group, status); |
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else { |
|
int mgids_changed, is_mgid0; |
|
|
|
if (ib_find_pkey(group->port->dev->device, |
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group->port->port_num, be16_to_cpu(rec->pkey), |
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&pkey_index)) |
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pkey_index = MCAST_INVALID_PKEY_INDEX; |
|
|
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spin_lock_irq(&group->port->lock); |
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if (group->state == MCAST_BUSY && |
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group->pkey_index == MCAST_INVALID_PKEY_INDEX) |
|
group->pkey_index = pkey_index; |
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mgids_changed = memcmp(&rec->mgid, &group->rec.mgid, |
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sizeof(group->rec.mgid)); |
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group->rec = *rec; |
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if (mgids_changed) { |
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rb_erase(&group->node, &group->port->table); |
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is_mgid0 = !memcmp(&mgid0, &group->rec.mgid, |
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sizeof(mgid0)); |
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mcast_insert(group->port, group, is_mgid0); |
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} |
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spin_unlock_irq(&group->port->lock); |
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} |
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mcast_work_handler(&group->work); |
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} |
|
|
|
static void leave_handler(int status, struct ib_sa_mcmember_rec *rec, |
|
void *context) |
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{ |
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struct mcast_group *group = context; |
|
|
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if (status && group->retries > 0 && |
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!send_leave(group, group->leave_state)) |
|
group->retries--; |
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else |
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mcast_work_handler(&group->work); |
|
} |
|
|
|
static struct mcast_group *acquire_group(struct mcast_port *port, |
|
union ib_gid *mgid, gfp_t gfp_mask) |
|
{ |
|
struct mcast_group *group, *cur_group; |
|
unsigned long flags; |
|
int is_mgid0; |
|
|
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is_mgid0 = !memcmp(&mgid0, mgid, sizeof mgid0); |
|
if (!is_mgid0) { |
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spin_lock_irqsave(&port->lock, flags); |
|
group = mcast_find(port, mgid); |
|
if (group) |
|
goto found; |
|
spin_unlock_irqrestore(&port->lock, flags); |
|
} |
|
|
|
group = kzalloc(sizeof *group, gfp_mask); |
|
if (!group) |
|
return NULL; |
|
|
|
group->retries = 3; |
|
group->port = port; |
|
group->rec.mgid = *mgid; |
|
group->pkey_index = MCAST_INVALID_PKEY_INDEX; |
|
INIT_LIST_HEAD(&group->pending_list); |
|
INIT_LIST_HEAD(&group->active_list); |
|
INIT_WORK(&group->work, mcast_work_handler); |
|
spin_lock_init(&group->lock); |
|
|
|
spin_lock_irqsave(&port->lock, flags); |
|
cur_group = mcast_insert(port, group, is_mgid0); |
|
if (cur_group) { |
|
kfree(group); |
|
group = cur_group; |
|
} else |
|
atomic_inc(&port->refcount); |
|
found: |
|
atomic_inc(&group->refcount); |
|
spin_unlock_irqrestore(&port->lock, flags); |
|
return group; |
|
} |
|
|
|
/* |
|
* We serialize all join requests to a single group to make our lives much |
|
* easier. Otherwise, two users could try to join the same group |
|
* simultaneously, with different configurations, one could leave while the |
|
* join is in progress, etc., which makes locking around error recovery |
|
* difficult. |
|
*/ |
|
struct ib_sa_multicast * |
|
ib_sa_join_multicast(struct ib_sa_client *client, |
|
struct ib_device *device, u32 port_num, |
|
struct ib_sa_mcmember_rec *rec, |
|
ib_sa_comp_mask comp_mask, gfp_t gfp_mask, |
|
int (*callback)(int status, |
|
struct ib_sa_multicast *multicast), |
|
void *context) |
|
{ |
|
struct mcast_device *dev; |
|
struct mcast_member *member; |
|
struct ib_sa_multicast *multicast; |
|
int ret; |
|
|
|
dev = ib_get_client_data(device, &mcast_client); |
|
if (!dev) |
|
return ERR_PTR(-ENODEV); |
|
|
|
member = kmalloc(sizeof *member, gfp_mask); |
|
if (!member) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
ib_sa_client_get(client); |
|
member->client = client; |
|
member->multicast.rec = *rec; |
|
member->multicast.comp_mask = comp_mask; |
|
member->multicast.callback = callback; |
|
member->multicast.context = context; |
|
init_completion(&member->comp); |
|
atomic_set(&member->refcount, 1); |
|
member->state = MCAST_JOINING; |
|
|
|
member->group = acquire_group(&dev->port[port_num - dev->start_port], |
|
&rec->mgid, gfp_mask); |
|
if (!member->group) { |
|
ret = -ENOMEM; |
|
goto err; |
|
} |
|
|
|
/* |
|
* The user will get the multicast structure in their callback. They |
|
* could then free the multicast structure before we can return from |
|
* this routine. So we save the pointer to return before queuing |
|
* any callback. |
|
*/ |
|
multicast = &member->multicast; |
|
queue_join(member); |
|
return multicast; |
|
|
|
err: |
|
ib_sa_client_put(client); |
|
kfree(member); |
|
return ERR_PTR(ret); |
|
} |
|
EXPORT_SYMBOL(ib_sa_join_multicast); |
|
|
|
void ib_sa_free_multicast(struct ib_sa_multicast *multicast) |
|
{ |
|
struct mcast_member *member; |
|
struct mcast_group *group; |
|
|
|
member = container_of(multicast, struct mcast_member, multicast); |
|
group = member->group; |
|
|
|
spin_lock_irq(&group->lock); |
|
if (member->state == MCAST_MEMBER) |
|
adjust_membership(group, multicast->rec.join_state, -1); |
|
|
|
list_del_init(&member->list); |
|
|
|
if (group->state == MCAST_IDLE) { |
|
group->state = MCAST_BUSY; |
|
spin_unlock_irq(&group->lock); |
|
/* Continue to hold reference on group until callback */ |
|
queue_work(mcast_wq, &group->work); |
|
} else { |
|
spin_unlock_irq(&group->lock); |
|
release_group(group); |
|
} |
|
|
|
deref_member(member); |
|
wait_for_completion(&member->comp); |
|
ib_sa_client_put(member->client); |
|
kfree(member); |
|
} |
|
EXPORT_SYMBOL(ib_sa_free_multicast); |
|
|
|
int ib_sa_get_mcmember_rec(struct ib_device *device, u32 port_num, |
|
union ib_gid *mgid, struct ib_sa_mcmember_rec *rec) |
|
{ |
|
struct mcast_device *dev; |
|
struct mcast_port *port; |
|
struct mcast_group *group; |
|
unsigned long flags; |
|
int ret = 0; |
|
|
|
dev = ib_get_client_data(device, &mcast_client); |
|
if (!dev) |
|
return -ENODEV; |
|
|
|
port = &dev->port[port_num - dev->start_port]; |
|
spin_lock_irqsave(&port->lock, flags); |
|
group = mcast_find(port, mgid); |
|
if (group) |
|
*rec = group->rec; |
|
else |
|
ret = -EADDRNOTAVAIL; |
|
spin_unlock_irqrestore(&port->lock, flags); |
|
|
|
return ret; |
|
} |
|
EXPORT_SYMBOL(ib_sa_get_mcmember_rec); |
|
|
|
/** |
|
* ib_init_ah_from_mcmember - Initialize AH attribute from multicast |
|
* member record and gid of the device. |
|
* @device: RDMA device |
|
* @port_num: Port of the rdma device to consider |
|
* @rec: Multicast member record to use |
|
* @ndev: Optional netdevice, applicable only for RoCE |
|
* @gid_type: GID type to consider |
|
* @ah_attr: AH attribute to fillup on successful completion |
|
* |
|
* ib_init_ah_from_mcmember() initializes AH attribute based on multicast |
|
* member record and other device properties. On success the caller is |
|
* responsible to call rdma_destroy_ah_attr on the ah_attr. Returns 0 on |
|
* success or appropriate error code. |
|
* |
|
*/ |
|
int ib_init_ah_from_mcmember(struct ib_device *device, u32 port_num, |
|
struct ib_sa_mcmember_rec *rec, |
|
struct net_device *ndev, |
|
enum ib_gid_type gid_type, |
|
struct rdma_ah_attr *ah_attr) |
|
{ |
|
const struct ib_gid_attr *sgid_attr; |
|
|
|
/* GID table is not based on the netdevice for IB link layer, |
|
* so ignore ndev during search. |
|
*/ |
|
if (rdma_protocol_ib(device, port_num)) |
|
ndev = NULL; |
|
else if (!rdma_protocol_roce(device, port_num)) |
|
return -EINVAL; |
|
|
|
sgid_attr = rdma_find_gid_by_port(device, &rec->port_gid, |
|
gid_type, port_num, ndev); |
|
if (IS_ERR(sgid_attr)) |
|
return PTR_ERR(sgid_attr); |
|
|
|
memset(ah_attr, 0, sizeof(*ah_attr)); |
|
ah_attr->type = rdma_ah_find_type(device, port_num); |
|
|
|
rdma_ah_set_dlid(ah_attr, be16_to_cpu(rec->mlid)); |
|
rdma_ah_set_sl(ah_attr, rec->sl); |
|
rdma_ah_set_port_num(ah_attr, port_num); |
|
rdma_ah_set_static_rate(ah_attr, rec->rate); |
|
rdma_move_grh_sgid_attr(ah_attr, &rec->mgid, |
|
be32_to_cpu(rec->flow_label), |
|
rec->hop_limit, rec->traffic_class, |
|
sgid_attr); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(ib_init_ah_from_mcmember); |
|
|
|
static void mcast_groups_event(struct mcast_port *port, |
|
enum mcast_group_state state) |
|
{ |
|
struct mcast_group *group; |
|
struct rb_node *node; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&port->lock, flags); |
|
for (node = rb_first(&port->table); node; node = rb_next(node)) { |
|
group = rb_entry(node, struct mcast_group, node); |
|
spin_lock(&group->lock); |
|
if (group->state == MCAST_IDLE) { |
|
atomic_inc(&group->refcount); |
|
queue_work(mcast_wq, &group->work); |
|
} |
|
if (group->state != MCAST_GROUP_ERROR) |
|
group->state = state; |
|
spin_unlock(&group->lock); |
|
} |
|
spin_unlock_irqrestore(&port->lock, flags); |
|
} |
|
|
|
static void mcast_event_handler(struct ib_event_handler *handler, |
|
struct ib_event *event) |
|
{ |
|
struct mcast_device *dev; |
|
int index; |
|
|
|
dev = container_of(handler, struct mcast_device, event_handler); |
|
if (!rdma_cap_ib_mcast(dev->device, event->element.port_num)) |
|
return; |
|
|
|
index = event->element.port_num - dev->start_port; |
|
|
|
switch (event->event) { |
|
case IB_EVENT_PORT_ERR: |
|
case IB_EVENT_LID_CHANGE: |
|
case IB_EVENT_CLIENT_REREGISTER: |
|
mcast_groups_event(&dev->port[index], MCAST_GROUP_ERROR); |
|
break; |
|
case IB_EVENT_PKEY_CHANGE: |
|
mcast_groups_event(&dev->port[index], MCAST_PKEY_EVENT); |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
static int mcast_add_one(struct ib_device *device) |
|
{ |
|
struct mcast_device *dev; |
|
struct mcast_port *port; |
|
int i; |
|
int count = 0; |
|
|
|
dev = kmalloc(struct_size(dev, port, device->phys_port_cnt), |
|
GFP_KERNEL); |
|
if (!dev) |
|
return -ENOMEM; |
|
|
|
dev->start_port = rdma_start_port(device); |
|
dev->end_port = rdma_end_port(device); |
|
|
|
for (i = 0; i <= dev->end_port - dev->start_port; i++) { |
|
if (!rdma_cap_ib_mcast(device, dev->start_port + i)) |
|
continue; |
|
port = &dev->port[i]; |
|
port->dev = dev; |
|
port->port_num = dev->start_port + i; |
|
spin_lock_init(&port->lock); |
|
port->table = RB_ROOT; |
|
init_completion(&port->comp); |
|
atomic_set(&port->refcount, 1); |
|
++count; |
|
} |
|
|
|
if (!count) { |
|
kfree(dev); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
dev->device = device; |
|
ib_set_client_data(device, &mcast_client, dev); |
|
|
|
INIT_IB_EVENT_HANDLER(&dev->event_handler, device, mcast_event_handler); |
|
ib_register_event_handler(&dev->event_handler); |
|
return 0; |
|
} |
|
|
|
static void mcast_remove_one(struct ib_device *device, void *client_data) |
|
{ |
|
struct mcast_device *dev = client_data; |
|
struct mcast_port *port; |
|
int i; |
|
|
|
ib_unregister_event_handler(&dev->event_handler); |
|
flush_workqueue(mcast_wq); |
|
|
|
for (i = 0; i <= dev->end_port - dev->start_port; i++) { |
|
if (rdma_cap_ib_mcast(device, dev->start_port + i)) { |
|
port = &dev->port[i]; |
|
deref_port(port); |
|
wait_for_completion(&port->comp); |
|
} |
|
} |
|
|
|
kfree(dev); |
|
} |
|
|
|
int mcast_init(void) |
|
{ |
|
int ret; |
|
|
|
mcast_wq = alloc_ordered_workqueue("ib_mcast", WQ_MEM_RECLAIM); |
|
if (!mcast_wq) |
|
return -ENOMEM; |
|
|
|
ib_sa_register_client(&sa_client); |
|
|
|
ret = ib_register_client(&mcast_client); |
|
if (ret) |
|
goto err; |
|
return 0; |
|
|
|
err: |
|
ib_sa_unregister_client(&sa_client); |
|
destroy_workqueue(mcast_wq); |
|
return ret; |
|
} |
|
|
|
void mcast_cleanup(void) |
|
{ |
|
ib_unregister_client(&mcast_client); |
|
ib_sa_unregister_client(&sa_client); |
|
destroy_workqueue(mcast_wq); |
|
}
|
|
|