/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Intel Corporation. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. * Copyright (c) 2005 Voltaire, 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/errno.h>#include <linux/slab.h>#include <linux/workqueue.h>#include <linux/netdevice.h>#include <net/addrconf.h> #include <rdma/ib_cache.h> #include "core_priv.h" struct ib_pkey_cache { int table_len; u16 table[0];}; struct ib_update_work { struct work_struct work; struct ib_device *device; u8 port_num; bool enforce_security;}; union ib_gid zgid;EXPORT_SYMBOL(zgid); static const struct ib_gid_attr zattr; enum gid_attr_find_mask { GID_ATTR_FIND_MASK_GID = 1UL << 0, GID_ATTR_FIND_MASK_NETDEV = 1UL << 1, GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2, GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3,}; enum gid_table_entry_props { GID_TABLE_ENTRY_INVALID = 1UL << 0, GID_TABLE_ENTRY_DEFAULT = 1UL << 1,}; enum gid_table_write_action { GID_TABLE_WRITE_ACTION_ADD, GID_TABLE_WRITE_ACTION_DEL, /* MODIFY only updates the GID table. Currently only used by * ib_cache_update. */ GID_TABLE_WRITE_ACTION_MODIFY}; struct ib_gid_table_entry { unsigned long props; union ib_gid gid; struct ib_gid_attr attr; void *context;}; struct ib_gid_table { int sz; /* In RoCE, adding a GID to the table requires: * (a) Find if this GID is already exists. * (b) Find a free space. * (c) Write the new GID * * Delete requires different set of operations: * (a) Find the GID * (b) Delete it. * * Add/delete should be carried out atomically. * This is done by locking this mutex from multiple * writers. We don't need this lock for IB, as the MAD * layer replaces all entries. All data_vec entries * are locked by this lock. **/ struct mutex lock; /* This lock protects the table entries from being * read and written simultaneously. */ rwlock_t rwlock; struct ib_gid_table_entry *data_vec;}; static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port){ if (rdma_cap_roce_gid_table(ib_dev, port)) { struct ib_event event; event.device = ib_dev; event.element.port_num = port; event.event = IB_EVENT_GID_CHANGE; ib_dispatch_event(&event); }} static const char * const gid_type_str[] = { [IB_GID_TYPE_IB] = "IB/RoCE v1", [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2",}; const char *ib_cache_gid_type_str(enum ib_gid_type gid_type){ if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) return gid_type_str[gid_type]; return "Invalid GID type";}EXPORT_SYMBOL(ib_cache_gid_type_str); int ib_cache_gid_parse_type_str(const char *buf){ unsigned int i; size_t len; int err = -EINVAL; len = strlen(buf); if (len == 0) return -EINVAL; if (buf[len - 1] == '\n') len--; for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && len == strlen(gid_type_str[i])) { err = i; break; } return err;}EXPORT_SYMBOL(ib_cache_gid_parse_type_str); /* This function expects that rwlock will be write locked in all * scenarios and that lock will be locked in sleep-able (RoCE) * scenarios. */static int write_gid(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table, int ix, const union ib_gid *gid, const struct ib_gid_attr *attr, enum gid_table_write_action action, bool default_gid) __releases(&table->rwlock) __acquires(&table->rwlock){ int ret = 0; struct net_device *old_net_dev; enum ib_gid_type old_gid_type; /* in rdma_cap_roce_gid_table, this funciton should be protected by a * sleep-able lock. */ if (rdma_cap_roce_gid_table(ib_dev, port)) { table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID; write_unlock_irq(&table->rwlock); /* GID_TABLE_WRITE_ACTION_MODIFY currently isn't supported by * RoCE providers and thus only updates the cache. */ if (action == GID_TABLE_WRITE_ACTION_ADD) ret = ib_dev->add_gid(ib_dev, port, ix, gid, attr, &table->data_vec[ix].context); else if (action == GID_TABLE_WRITE_ACTION_DEL) ret = ib_dev->del_gid(ib_dev, port, ix, &table->data_vec[ix].context); write_lock_irq(&table->rwlock); } old_net_dev = table->data_vec[ix].attr.ndev; old_gid_type = table->data_vec[ix].attr.gid_type; if (old_net_dev && old_net_dev != attr->ndev) dev_put(old_net_dev); /* if modify_gid failed, just delete the old gid */ if (ret || action == GID_TABLE_WRITE_ACTION_DEL) { gid = &zgid; attr = &zattr; table->data_vec[ix].context = NULL; } memcpy(&table->data_vec[ix].gid, gid, sizeof(*gid)); memcpy(&table->data_vec[ix].attr, attr, sizeof(*attr)); if (default_gid) { table->data_vec[ix].props |= GID_TABLE_ENTRY_DEFAULT; if (action == GID_TABLE_WRITE_ACTION_DEL) table->data_vec[ix].attr.gid_type = old_gid_type; } if (table->data_vec[ix].attr.ndev && table->data_vec[ix].attr.ndev != old_net_dev) dev_hold(table->data_vec[ix].attr.ndev); table->data_vec[ix].props &= ~GID_TABLE_ENTRY_INVALID; return ret;} static int add_gid(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table, int ix, const union ib_gid *gid, const struct ib_gid_attr *attr, bool default_gid) { return write_gid(ib_dev, port, table, ix, gid, attr, GID_TABLE_WRITE_ACTION_ADD, default_gid);} static int modify_gid(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table, int ix, const union ib_gid *gid, const struct ib_gid_attr *attr, bool default_gid) { return write_gid(ib_dev, port, table, ix, gid, attr, GID_TABLE_WRITE_ACTION_MODIFY, default_gid);} static int del_gid(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table, int ix, bool default_gid) { return write_gid(ib_dev, port, table, ix, &zgid, &zattr, GID_TABLE_WRITE_ACTION_DEL, default_gid);} /* rwlock should be read locked */static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, const struct ib_gid_attr *val, bool default_gid, unsigned long mask, int *pempty){ int i = 0; int found = -1; int empty = pempty ? -1 : 0; while (i < table->sz && (found < 0 || empty < 0)) { struct ib_gid_table_entry *data = &table->data_vec[i]; struct ib_gid_attr *attr = &data->attr; int curr_index = i; i++; if (data->props & GID_TABLE_ENTRY_INVALID) continue; if (empty < 0) if (!memcmp(&data->gid, &zgid, sizeof(*gid)) && !memcmp(attr, &zattr, sizeof(*attr)) && !data->props) empty = curr_index; if (found >= 0) continue; if (mask & GID_ATTR_FIND_MASK_GID_TYPE && attr->gid_type != val->gid_type) continue; if (mask & GID_ATTR_FIND_MASK_GID && memcmp(gid, &data->gid, sizeof(*gid))) continue; if (mask & GID_ATTR_FIND_MASK_NETDEV && attr->ndev != val->ndev) continue; if (mask & GID_ATTR_FIND_MASK_DEFAULT && !!(data->props & GID_TABLE_ENTRY_DEFAULT) != default_gid) continue; found = curr_index; } if (pempty) *pempty = empty; return found;} static void make_default_gid(struct net_device *dev, union ib_gid *gid){ gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); addrconf_ifid_eui48(&gid->raw[8], dev);} int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, union ib_gid *gid, struct ib_gid_attr *attr){ struct ib_gid_table *table; int ix; int ret = 0; struct net_device *idev; int empty; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; if (!memcmp(gid, &zgid, sizeof(*gid))) return -EINVAL; if (ib_dev->get_netdev) { idev = ib_dev->get_netdev(ib_dev, port); if (idev && attr->ndev != idev) { union ib_gid default_gid; /* Adding default GIDs in not permitted */ make_default_gid(idev, &default_gid); if (!memcmp(gid, &default_gid, sizeof(*gid))) { dev_put(idev); return -EPERM; } } if (idev) dev_put(idev); } mutex_lock(&table->lock); write_lock_irq(&table->rwlock); ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE | GID_ATTR_FIND_MASK_NETDEV, &empty); if (ix >= 0) goto out_unlock; if (empty < 0) { ret = -ENOSPC; goto out_unlock; } ret = add_gid(ib_dev, port, table, empty, gid, attr, false); if (!ret) dispatch_gid_change_event(ib_dev, port); out_unlock: write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); return ret;} int ib_cache_gid_del(struct ib_device *ib_dev, u8 port, union ib_gid *gid, struct ib_gid_attr *attr){ struct ib_gid_table *table; int ix; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; mutex_lock(&table->lock); write_lock_irq(&table->rwlock); ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE | GID_ATTR_FIND_MASK_NETDEV | GID_ATTR_FIND_MASK_DEFAULT, NULL); if (ix < 0) goto out_unlock; if (!del_gid(ib_dev, port, table, ix, false)) dispatch_gid_change_event(ib_dev, port); out_unlock: write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); return 0;} int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, struct net_device *ndev){ struct ib_gid_table *table; int ix; bool deleted = false; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; mutex_lock(&table->lock); write_lock_irq(&table->rwlock); for (ix = 0; ix < table->sz; ix++) if (table->data_vec[ix].attr.ndev == ndev) if (!del_gid(ib_dev, port, table, ix, !!(table->data_vec[ix].props & GID_TABLE_ENTRY_DEFAULT))) deleted = true; write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); if (deleted) dispatch_gid_change_event(ib_dev, port); return 0;} static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index, union ib_gid *gid, struct ib_gid_attr *attr){ struct ib_gid_table *table; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; if (index < 0 || index >= table->sz) return -EINVAL; if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID) return -EAGAIN; memcpy(gid, &table->data_vec[index].gid, sizeof(*gid)); if (attr) { memcpy(attr, &table->data_vec[index].attr, sizeof(*attr)); if (attr->ndev) dev_hold(attr->ndev); } return 0;} static int _ib_cache_gid_table_find(struct ib_device *ib_dev, const union ib_gid *gid, const struct ib_gid_attr *val, unsigned long mask, u8 *port, u16 *index){ struct ib_gid_table *table; u8 p; int local_index; unsigned long flags; for (p = 0; p < ib_dev->phys_port_cnt; p++) { table = ib_dev->cache.ports[p].gid; read_lock_irqsave(&table->rwlock, flags); local_index = find_gid(table, gid, val, false, mask, NULL); if (local_index >= 0) { if (index) *index = local_index; if (port) *port = p + rdma_start_port(ib_dev); read_unlock_irqrestore(&table->rwlock, flags); return 0; } read_unlock_irqrestore(&table->rwlock, flags); } return -ENOENT;} static int ib_cache_gid_find(struct ib_device *ib_dev, const union ib_gid *gid, enum ib_gid_type gid_type, struct net_device *ndev, u8 *port, u16 *index){ unsigned long mask = GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE; struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type}; if (ndev) mask |= GID_ATTR_FIND_MASK_NETDEV; return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val, mask, port, index);} int ib_find_cached_gid_by_port(struct ib_device *ib_dev, const union ib_gid *gid, enum ib_gid_type gid_type, u8 port, struct net_device *ndev, u16 *index){Lines 1–500 of 1267. 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/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Intel Corporation. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. * Copyright (c) 2005 Voltaire, 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/errno.h> #include <linux/slab.h> #include <linux/workqueue.h> #include <linux/netdevice.h> #include <net/addrconf.h> #include <rdma/ib_cache.h> #include "core_priv.h" struct ib_pkey_cache { int table_len; u16 table[0]; }; struct ib_update_work { struct work_struct work; struct ib_device *device; u8 port_num; bool enforce_security; }; union ib_gid zgid; EXPORT_SYMBOL(zgid); static const struct ib_gid_attr zattr; enum gid_attr_find_mask { GID_ATTR_FIND_MASK_GID = 1UL << 0, GID_ATTR_FIND_MASK_NETDEV = 1UL << 1, GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2, GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3, }; enum gid_table_entry_props { GID_TABLE_ENTRY_INVALID = 1UL << 0, GID_TABLE_ENTRY_DEFAULT = 1UL << 1, }; enum gid_table_write_action { GID_TABLE_WRITE_ACTION_ADD, GID_TABLE_WRITE_ACTION_DEL, /* MODIFY only updates the GID table. Currently only used by * ib_cache_update. */ GID_TABLE_WRITE_ACTION_MODIFY }; struct ib_gid_table_entry { unsigned long props; union ib_gid gid; struct ib_gid_attr attr; void *context; }; struct ib_gid_table { int sz; /* In RoCE, adding a GID to the table requires: * (a) Find if this GID is already exists. * (b) Find a free space. * (c) Write the new GID * * Delete requires different set of operations: * (a) Find the GID * (b) Delete it. * * Add/delete should be carried out atomically. * This is done by locking this mutex from multiple * writers. We don't need this lock for IB, as the MAD * layer replaces all entries. All data_vec entries * are locked by this lock. **/ struct mutex lock; /* This lock protects the table entries from being * read and written simultaneously. */ rwlock_t rwlock; struct ib_gid_table_entry *data_vec; }; static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port) { if (rdma_cap_roce_gid_table(ib_dev, port)) { struct ib_event event; event.device = ib_dev; event.element.port_num = port; event.event = IB_EVENT_GID_CHANGE; ib_dispatch_event(&event); } } static const char * const gid_type_str[] = { [IB_GID_TYPE_IB] = "IB/RoCE v1", [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2", }; const char *ib_cache_gid_type_str(enum ib_gid_type gid_type) { if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) return gid_type_str[gid_type]; return "Invalid GID type"; } EXPORT_SYMBOL(ib_cache_gid_type_str); int ib_cache_gid_parse_type_str(const char *buf) { unsigned int i; size_t len; int err = -EINVAL; len = strlen(buf); if (len == 0) return -EINVAL; if (buf[len - 1] == '\n') len--; for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && len == strlen(gid_type_str[i])) { err = i; break; } return err; } EXPORT_SYMBOL(ib_cache_gid_parse_type_str); /* This function expects that rwlock will be write locked in all * scenarios and that lock will be locked in sleep-able (RoCE) * scenarios. */ static int write_gid(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table, int ix, const union ib_gid *gid, const struct ib_gid_attr *attr, enum gid_table_write_action action, bool default_gid) __releases(&table->rwlock) __acquires(&table->rwlock) { int ret = 0; struct net_device *old_net_dev; enum ib_gid_type old_gid_type; /* in rdma_cap_roce_gid_table, this funciton should be protected by a * sleep-able lock. */ if (rdma_cap_roce_gid_table(ib_dev, port)) { table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID; write_unlock_irq(&table->rwlock); /* GID_TABLE_WRITE_ACTION_MODIFY currently isn't supported by * RoCE providers and thus only updates the cache. */ if (action == GID_TABLE_WRITE_ACTION_ADD) ret = ib_dev->add_gid(ib_dev, port, ix, gid, attr, &table->data_vec[ix].context); else if (action == GID_TABLE_WRITE_ACTION_DEL) ret = ib_dev->del_gid(ib_dev, port, ix, &table->data_vec[ix].context); write_lock_irq(&table->rwlock); } old_net_dev = table->data_vec[ix].attr.ndev; old_gid_type = table->data_vec[ix].attr.gid_type; if (old_net_dev && old_net_dev != attr->ndev) dev_put(old_net_dev); /* if modify_gid failed, just delete the old gid */ if (ret || action == GID_TABLE_WRITE_ACTION_DEL) { gid = &zgid; attr = &zattr; table->data_vec[ix].context = NULL; } memcpy(&table->data_vec[ix].gid, gid, sizeof(*gid)); memcpy(&table->data_vec[ix].attr, attr, sizeof(*attr)); if (default_gid) { table->data_vec[ix].props |= GID_TABLE_ENTRY_DEFAULT; if (action == GID_TABLE_WRITE_ACTION_DEL) table->data_vec[ix].attr.gid_type = old_gid_type; } if (table->data_vec[ix].attr.ndev && table->data_vec[ix].attr.ndev != old_net_dev) dev_hold(table->data_vec[ix].attr.ndev); table->data_vec[ix].props &= ~GID_TABLE_ENTRY_INVALID; return ret; } static int add_gid(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table, int ix, const union ib_gid *gid, const struct ib_gid_attr *attr, bool default_gid) { return write_gid(ib_dev, port, table, ix, gid, attr, GID_TABLE_WRITE_ACTION_ADD, default_gid); } static int modify_gid(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table, int ix, const union ib_gid *gid, const struct ib_gid_attr *attr, bool default_gid) { return write_gid(ib_dev, port, table, ix, gid, attr, GID_TABLE_WRITE_ACTION_MODIFY, default_gid); } static int del_gid(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table, int ix, bool default_gid) { return write_gid(ib_dev, port, table, ix, &zgid, &zattr, GID_TABLE_WRITE_ACTION_DEL, default_gid); } /* rwlock should be read locked */ static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, const struct ib_gid_attr *val, bool default_gid, unsigned long mask, int *pempty) { int i = 0; int found = -1; int empty = pempty ? -1 : 0; while (i < table->sz && (found < 0 || empty < 0)) { struct ib_gid_table_entry *data = &table->data_vec[i]; struct ib_gid_attr *attr = &data->attr; int curr_index = i; i++; if (data->props & GID_TABLE_ENTRY_INVALID) continue; if (empty < 0) if (!memcmp(&data->gid, &zgid, sizeof(*gid)) && !memcmp(attr, &zattr, sizeof(*attr)) && !data->props) empty = curr_index; if (found >= 0) continue; if (mask & GID_ATTR_FIND_MASK_GID_TYPE && attr->gid_type != val->gid_type) continue; if (mask & GID_ATTR_FIND_MASK_GID && memcmp(gid, &data->gid, sizeof(*gid))) continue; if (mask & GID_ATTR_FIND_MASK_NETDEV && attr->ndev != val->ndev) continue; if (mask & GID_ATTR_FIND_MASK_DEFAULT && !!(data->props & GID_TABLE_ENTRY_DEFAULT) != default_gid) continue; found = curr_index; } if (pempty) *pempty = empty; return found; } static void make_default_gid(struct net_device *dev, union ib_gid *gid) { gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); addrconf_ifid_eui48(&gid->raw[8], dev); } int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, union ib_gid *gid, struct ib_gid_attr *attr) { struct ib_gid_table *table; int ix; int ret = 0; struct net_device *idev; int empty; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; if (!memcmp(gid, &zgid, sizeof(*gid))) return -EINVAL; if (ib_dev->get_netdev) { idev = ib_dev->get_netdev(ib_dev, port); if (idev && attr->ndev != idev) { union ib_gid default_gid; /* Adding default GIDs in not permitted */ make_default_gid(idev, &default_gid); if (!memcmp(gid, &default_gid, sizeof(*gid))) { dev_put(idev); return -EPERM; } } if (idev) dev_put(idev); } mutex_lock(&table->lock); write_lock_irq(&table->rwlock); ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE | GID_ATTR_FIND_MASK_NETDEV, &empty); if (ix >= 0) goto out_unlock; if (empty < 0) { ret = -ENOSPC; goto out_unlock; } ret = add_gid(ib_dev, port, table, empty, gid, attr, false); if (!ret) dispatch_gid_change_event(ib_dev, port); out_unlock: write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); return ret; } int ib_cache_gid_del(struct ib_device *ib_dev, u8 port, union ib_gid *gid, struct ib_gid_attr *attr) { struct ib_gid_table *table; int ix; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; mutex_lock(&table->lock); write_lock_irq(&table->rwlock); ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE | GID_ATTR_FIND_MASK_NETDEV | GID_ATTR_FIND_MASK_DEFAULT, NULL); if (ix < 0) goto out_unlock; if (!del_gid(ib_dev, port, table, ix, false)) dispatch_gid_change_event(ib_dev, port); out_unlock: write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); return 0; } int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, struct net_device *ndev) { struct ib_gid_table *table; int ix; bool deleted = false; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; mutex_lock(&table->lock); write_lock_irq(&table->rwlock); for (ix = 0; ix < table->sz; ix++) if (table->data_vec[ix].attr.ndev == ndev) if (!del_gid(ib_dev, port, table, ix, !!(table->data_vec[ix].props & GID_TABLE_ENTRY_DEFAULT))) deleted = true; write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); if (deleted) dispatch_gid_change_event(ib_dev, port); return 0; } static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index, union ib_gid *gid, struct ib_gid_attr *attr) { struct ib_gid_table *table; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; if (index < 0 || index >= table->sz) return -EINVAL; if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID) return -EAGAIN; memcpy(gid, &table->data_vec[index].gid, sizeof(*gid)); if (attr) { memcpy(attr, &table->data_vec[index].attr, sizeof(*attr)); if (attr->ndev) dev_hold(attr->ndev); } return 0; } static int _ib_cache_gid_table_find(struct ib_device *ib_dev, const union ib_gid *gid, const struct ib_gid_attr *val, unsigned long mask, u8 *port, u16 *index) { struct ib_gid_table *table; u8 p; int local_index; unsigned long flags; for (p = 0; p < ib_dev->phys_port_cnt; p++) { table = ib_dev->cache.ports[p].gid; read_lock_irqsave(&table->rwlock, flags); local_index = find_gid(table, gid, val, false, mask, NULL); if (local_index >= 0) { if (index) *index = local_index; if (port) *port = p + rdma_start_port(ib_dev); read_unlock_irqrestore(&table->rwlock, flags); return 0; } read_unlock_irqrestore(&table->rwlock, flags); } return -ENOENT; } static int ib_cache_gid_find(struct ib_device *ib_dev, const union ib_gid *gid, enum ib_gid_type gid_type, struct net_device *ndev, u8 *port, u16 *index) { unsigned long mask = GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE; struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type}; if (ndev) mask |= GID_ATTR_FIND_MASK_NETDEV; return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val, mask, port, index); } int ib_find_cached_gid_by_port(struct ib_device *ib_dev, const union ib_gid *gid, enum ib_gid_type gid_type, u8 port, struct net_device *ndev, u16 *index) {