IB/cma: Add configfs for rdma_cm
Users would like to control the behaviour of rdma_cm. For example, old applications which don't set the required RoCE gid type could be executed on RoCE V2 network types. In order to support this configuration, we implement a configfs for rdma_cm. In order to use the configfs, one needs to mount it and mkdir <IB device name> inside rdma_cm directory. The patch adds support for a single configuration file, default_roce_mode. The mode can either be "IB/RoCE v1" or "RoCE v2". Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Matan Barak
Doug Ledford
parent
218a773f76
commit
045959db65
22
Documentation/ABI/testing/configfs-rdma_cm
Normal file
22
Documentation/ABI/testing/configfs-rdma_cm
Normal file
@ -0,0 +1,22 @@
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What: /config/rdma_cm
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Date: November 29, 2015
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KernelVersion: 4.4.0
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Description: Interface is used to configure RDMA-cable HCAs in respect to
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RDMA-CM attributes.
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Attributes are visible only when configfs is mounted. To mount
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configfs in /config directory use:
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# mount -t configfs none /config/
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In order to set parameters related to a specific HCA, a directory
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for this HCA has to be created:
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mkdir -p /config/rdma_cm/<hca>
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What: /config/rdma_cm/<hca>/ports/<port-num>/default_roce_mode
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Date: November 29, 2015
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KernelVersion: 4.4.0
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Description: RDMA-CM based connections from HCA <hca> at port <port-num>
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will be initiated with this RoCE type as default.
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The possible RoCE types are either "IB/RoCE v1" or "RoCE v2".
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This parameter has RW access.
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@ -55,6 +55,15 @@ config INFINIBAND_ADDR_TRANS
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depends on INFINIBAND
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default y
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config INFINIBAND_ADDR_TRANS_CONFIGFS
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bool
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depends on INFINIBAND_ADDR_TRANS && CONFIGFS_FS && !(INFINIBAND=y && CONFIGFS_FS=m)
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default y
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---help---
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ConfigFS support for RDMA communication manager (CM).
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This allows the user to config the default GID type that the CM
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uses for each device, when initiaing new connections.
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source "drivers/infiniband/hw/mthca/Kconfig"
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source "drivers/infiniband/hw/qib/Kconfig"
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source "drivers/infiniband/hw/cxgb3/Kconfig"
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@ -24,6 +24,8 @@ iw_cm-y := iwcm.o iwpm_util.o iwpm_msg.o
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rdma_cm-y := cma.o
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rdma_cm-$(CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS) += cma_configfs.o
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rdma_ucm-y := ucma.o
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ib_addr-y := addr.o
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@ -140,6 +140,30 @@ const char *ib_cache_gid_type_str(enum ib_gid_type gid_type)
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}
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EXPORT_SYMBOL(ib_cache_gid_type_str);
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int ib_cache_gid_parse_type_str(const char *buf)
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{
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unsigned int i;
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size_t len;
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int err = -EINVAL;
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len = strlen(buf);
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if (len == 0)
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return -EINVAL;
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if (buf[len - 1] == '\n')
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len--;
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for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i)
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if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) &&
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len == strlen(gid_type_str[i])) {
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err = i;
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break;
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}
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return err;
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}
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EXPORT_SYMBOL(ib_cache_gid_parse_type_str);
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/* This function expects that rwlock will be write locked in all
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* scenarios and that lock will be locked in sleep-able (RoCE)
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* scenarios.
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@ -152,6 +152,7 @@ struct cma_device {
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struct completion comp;
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atomic_t refcount;
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struct list_head id_list;
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enum ib_gid_type *default_gid_type;
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};
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struct rdma_bind_list {
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@ -192,6 +193,62 @@ void cma_ref_dev(struct cma_device *cma_dev)
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atomic_inc(&cma_dev->refcount);
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}
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struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
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void *cookie)
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{
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struct cma_device *cma_dev;
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struct cma_device *found_cma_dev = NULL;
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mutex_lock(&lock);
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list_for_each_entry(cma_dev, &dev_list, list)
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if (filter(cma_dev->device, cookie)) {
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found_cma_dev = cma_dev;
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break;
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}
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if (found_cma_dev)
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cma_ref_dev(found_cma_dev);
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mutex_unlock(&lock);
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return found_cma_dev;
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}
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int cma_get_default_gid_type(struct cma_device *cma_dev,
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unsigned int port)
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{
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if (port < rdma_start_port(cma_dev->device) ||
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port > rdma_end_port(cma_dev->device))
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return -EINVAL;
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return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
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}
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int cma_set_default_gid_type(struct cma_device *cma_dev,
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unsigned int port,
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enum ib_gid_type default_gid_type)
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{
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unsigned long supported_gids;
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if (port < rdma_start_port(cma_dev->device) ||
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port > rdma_end_port(cma_dev->device))
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return -EINVAL;
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supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
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if (!(supported_gids & 1 << default_gid_type))
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return -EINVAL;
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cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
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default_gid_type;
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return 0;
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}
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struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
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{
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return cma_dev->device;
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}
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/*
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* Device removal can occur at anytime, so we need extra handling to
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* serialize notifying the user of device removal with other callbacks.
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@ -343,17 +400,27 @@ static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
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hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
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}
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static void cma_attach_to_dev(struct rdma_id_private *id_priv,
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struct cma_device *cma_dev)
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static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
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struct cma_device *cma_dev)
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{
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cma_ref_dev(cma_dev);
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id_priv->cma_dev = cma_dev;
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id_priv->gid_type = 0;
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id_priv->id.device = cma_dev->device;
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id_priv->id.route.addr.dev_addr.transport =
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rdma_node_get_transport(cma_dev->device->node_type);
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list_add_tail(&id_priv->list, &cma_dev->id_list);
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}
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static void cma_attach_to_dev(struct rdma_id_private *id_priv,
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struct cma_device *cma_dev)
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{
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_cma_attach_to_dev(id_priv, cma_dev);
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id_priv->gid_type =
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cma_dev->default_gid_type[id_priv->id.port_num -
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rdma_start_port(cma_dev->device)];
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}
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void cma_deref_dev(struct cma_device *cma_dev)
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{
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if (atomic_dec_and_test(&cma_dev->refcount))
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@ -449,6 +516,7 @@ static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_a
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}
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static inline int cma_validate_port(struct ib_device *device, u8 port,
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enum ib_gid_type gid_type,
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union ib_gid *gid, int dev_type,
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int bound_if_index)
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{
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@ -474,9 +542,11 @@ static inline int cma_validate_port(struct ib_device *device, u8 port,
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if (!ndev)
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return -ENODEV;
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}
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} else {
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gid_type = IB_GID_TYPE_IB;
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}
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ret = ib_find_cached_gid_by_port(device, gid, IB_GID_TYPE_IB, port,
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ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
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ndev, NULL);
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if (ndev)
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@ -511,7 +581,10 @@ static int cma_acquire_dev(struct rdma_id_private *id_priv,
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gidp = rdma_protocol_roce(cma_dev->device, port) ?
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&iboe_gid : &gid;
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ret = cma_validate_port(cma_dev->device, port, gidp,
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ret = cma_validate_port(cma_dev->device, port,
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rdma_protocol_ib(cma_dev->device, port) ?
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IB_GID_TYPE_IB :
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listen_id_priv->gid_type, gidp,
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dev_addr->dev_type,
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dev_addr->bound_dev_if);
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if (!ret) {
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@ -530,8 +603,11 @@ static int cma_acquire_dev(struct rdma_id_private *id_priv,
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gidp = rdma_protocol_roce(cma_dev->device, port) ?
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&iboe_gid : &gid;
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ret = cma_validate_port(cma_dev->device, port, gidp,
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dev_addr->dev_type,
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ret = cma_validate_port(cma_dev->device, port,
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rdma_protocol_ib(cma_dev->device, port) ?
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IB_GID_TYPE_IB :
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cma_dev->default_gid_type[port - 1],
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gidp, dev_addr->dev_type,
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dev_addr->bound_dev_if);
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if (!ret) {
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id_priv->id.port_num = port;
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@ -2062,7 +2138,7 @@ static void cma_listen_on_dev(struct rdma_id_private *id_priv,
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memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
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rdma_addr_size(cma_src_addr(id_priv)));
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cma_attach_to_dev(dev_id_priv, cma_dev);
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_cma_attach_to_dev(dev_id_priv, cma_dev);
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list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
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atomic_inc(&id_priv->refcount);
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dev_id_priv->internal_id = 1;
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@ -3896,12 +3972,27 @@ static void cma_add_one(struct ib_device *device)
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{
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struct cma_device *cma_dev;
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struct rdma_id_private *id_priv;
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unsigned int i;
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unsigned long supported_gids = 0;
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cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
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if (!cma_dev)
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return;
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cma_dev->device = device;
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cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
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sizeof(*cma_dev->default_gid_type),
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GFP_KERNEL);
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if (!cma_dev->default_gid_type) {
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kfree(cma_dev);
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return;
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}
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for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
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supported_gids = roce_gid_type_mask_support(device, i);
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WARN_ON(!supported_gids);
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cma_dev->default_gid_type[i - rdma_start_port(device)] =
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find_first_bit(&supported_gids, BITS_PER_LONG);
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}
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init_completion(&cma_dev->comp);
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atomic_set(&cma_dev->refcount, 1);
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@ -3981,6 +4072,7 @@ static void cma_remove_one(struct ib_device *device, void *client_data)
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mutex_unlock(&lock);
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cma_process_remove(cma_dev);
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kfree(cma_dev->default_gid_type);
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kfree(cma_dev);
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}
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@ -4114,6 +4206,7 @@ static int __init cma_init(void)
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if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
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printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
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cma_configfs_init();
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return 0;
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@ -4128,6 +4221,7 @@ err_wq:
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static void __exit cma_cleanup(void)
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{
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cma_configfs_exit();
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ibnl_remove_client(RDMA_NL_RDMA_CM);
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ib_unregister_client(&cma_client);
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unregister_netdevice_notifier(&cma_nb);
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322
drivers/infiniband/core/cma_configfs.c
Normal file
322
drivers/infiniband/core/cma_configfs.c
Normal file
@ -0,0 +1,322 @@
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/*
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* Copyright (c) 2015, Mellanox Technologies inc. 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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#include <linux/module.h>
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#include <linux/configfs.h>
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#include <rdma/ib_verbs.h>
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#include "core_priv.h"
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struct cma_device;
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struct cma_dev_group;
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struct cma_dev_port_group {
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unsigned int port_num;
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struct cma_dev_group *cma_dev_group;
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struct config_group group;
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};
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struct cma_dev_group {
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char name[IB_DEVICE_NAME_MAX];
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struct config_group device_group;
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struct config_group ports_group;
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struct config_group *default_dev_group[2];
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struct config_group **default_ports_group;
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struct cma_dev_port_group *ports;
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};
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static struct cma_dev_port_group *to_dev_port_group(struct config_item *item)
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{
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struct config_group *group;
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if (!item)
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return NULL;
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group = container_of(item, struct config_group, cg_item);
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return container_of(group, struct cma_dev_port_group, group);
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}
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static bool filter_by_name(struct ib_device *ib_dev, void *cookie)
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{
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return !strcmp(ib_dev->name, cookie);
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}
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static int cma_configfs_params_get(struct config_item *item,
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struct cma_device **pcma_dev,
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struct cma_dev_port_group **pgroup)
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{
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struct cma_dev_port_group *group = to_dev_port_group(item);
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struct cma_device *cma_dev;
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if (!group)
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return -ENODEV;
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cma_dev = cma_enum_devices_by_ibdev(filter_by_name,
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group->cma_dev_group->name);
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if (!cma_dev)
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return -ENODEV;
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*pcma_dev = cma_dev;
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*pgroup = group;
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return 0;
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}
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static void cma_configfs_params_put(struct cma_device *cma_dev)
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{
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cma_deref_dev(cma_dev);
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}
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static ssize_t default_roce_mode_show(struct config_item *item,
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char *buf)
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{
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struct cma_device *cma_dev;
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struct cma_dev_port_group *group;
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int gid_type;
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ssize_t ret;
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ret = cma_configfs_params_get(item, &cma_dev, &group);
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if (ret)
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return ret;
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gid_type = cma_get_default_gid_type(cma_dev, group->port_num);
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cma_configfs_params_put(cma_dev);
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if (gid_type < 0)
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return gid_type;
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return sprintf(buf, "%s\n", ib_cache_gid_type_str(gid_type));
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}
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static ssize_t default_roce_mode_store(struct config_item *item,
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const char *buf, size_t count)
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{
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struct cma_device *cma_dev;
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struct cma_dev_port_group *group;
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int gid_type = ib_cache_gid_parse_type_str(buf);
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ssize_t ret;
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if (gid_type < 0)
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return -EINVAL;
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ret = cma_configfs_params_get(item, &cma_dev, &group);
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if (ret)
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return ret;
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ret = cma_set_default_gid_type(cma_dev, group->port_num, gid_type);
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cma_configfs_params_put(cma_dev);
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return !ret ? strnlen(buf, count) : ret;
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}
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CONFIGFS_ATTR(, default_roce_mode);
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|
||||
static struct configfs_attribute *cma_configfs_attributes[] = {
|
||||
&attr_default_roce_mode,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct config_item_type cma_port_group_type = {
|
||||
.ct_attrs = cma_configfs_attributes,
|
||||
.ct_owner = THIS_MODULE
|
||||
};
|
||||
|
||||
static int make_cma_ports(struct cma_dev_group *cma_dev_group,
|
||||
struct cma_device *cma_dev)
|
||||
{
|
||||
struct ib_device *ibdev;
|
||||
unsigned int i;
|
||||
unsigned int ports_num;
|
||||
struct cma_dev_port_group *ports;
|
||||
int err;
|
||||
|
||||
ibdev = cma_get_ib_dev(cma_dev);
|
||||
|
||||
if (!ibdev)
|
||||
return -ENODEV;
|
||||
|
||||
ports_num = ibdev->phys_port_cnt;
|
||||
ports = kcalloc(ports_num, sizeof(*cma_dev_group->ports),
|
||||
GFP_KERNEL);
|
||||
|
||||
cma_dev_group->default_ports_group = kcalloc(ports_num + 1,
|
||||
sizeof(*cma_dev_group->ports),
|
||||
GFP_KERNEL);
|
||||
|
||||
if (!ports || !cma_dev_group->default_ports_group) {
|
||||
err = -ENOMEM;
|
||||
goto free;
|
||||
}
|
||||
|
||||
for (i = 0; i < ports_num; i++) {
|
||||
char port_str[10];
|
||||
|
||||
ports[i].port_num = i + 1;
|
||||
snprintf(port_str, sizeof(port_str), "%u", i + 1);
|
||||
ports[i].cma_dev_group = cma_dev_group;
|
||||
config_group_init_type_name(&ports[i].group,
|
||||
port_str,
|
||||
&cma_port_group_type);
|
||||
cma_dev_group->default_ports_group[i] = &ports[i].group;
|
||||
}
|
||||
cma_dev_group->default_ports_group[i] = NULL;
|
||||
cma_dev_group->ports = ports;
|
||||
|
||||
return 0;
|
||||
free:
|
||||
kfree(ports);
|
||||
kfree(cma_dev_group->default_ports_group);
|
||||
cma_dev_group->ports = NULL;
|
||||
cma_dev_group->default_ports_group = NULL;
|
||||
return err;
|
||||
}
|
||||
|
||||
static void release_cma_dev(struct config_item *item)
|
||||
{
|
||||
struct config_group *group = container_of(item, struct config_group,
|
||||
cg_item);
|
||||
struct cma_dev_group *cma_dev_group = container_of(group,
|
||||
struct cma_dev_group,
|
||||
device_group);
|
||||
|
||||
kfree(cma_dev_group);
|
||||
};
|
||||
|
||||
static void release_cma_ports_group(struct config_item *item)
|
||||
{
|
||||
struct config_group *group = container_of(item, struct config_group,
|
||||
cg_item);
|
||||
struct cma_dev_group *cma_dev_group = container_of(group,
|
||||
struct cma_dev_group,
|
||||
ports_group);
|
||||
|
||||
kfree(cma_dev_group->ports);
|
||||
kfree(cma_dev_group->default_ports_group);
|
||||
cma_dev_group->ports = NULL;
|
||||
cma_dev_group->default_ports_group = NULL;
|
||||
};
|
||||
|
||||
static struct configfs_item_operations cma_ports_item_ops = {
|
||||
.release = release_cma_ports_group
|
||||
};
|
||||
|
||||
static struct config_item_type cma_ports_group_type = {
|
||||
.ct_item_ops = &cma_ports_item_ops,
|
||||
.ct_owner = THIS_MODULE
|
||||
};
|
||||
|
||||
static struct configfs_item_operations cma_device_item_ops = {
|
||||
.release = release_cma_dev
|
||||
};
|
||||
|
||||
static struct config_item_type cma_device_group_type = {
|
||||
.ct_item_ops = &cma_device_item_ops,
|
||||
.ct_owner = THIS_MODULE
|
||||
};
|
||||
|
||||
static struct config_group *make_cma_dev(struct config_group *group,
|
||||
const char *name)
|
||||
{
|
||||
int err = -ENODEV;
|
||||
struct cma_device *cma_dev = cma_enum_devices_by_ibdev(filter_by_name,
|
||||
(void *)name);
|
||||
struct cma_dev_group *cma_dev_group = NULL;
|
||||
|
||||
if (!cma_dev)
|
||||
goto fail;
|
||||
|
||||
cma_dev_group = kzalloc(sizeof(*cma_dev_group), GFP_KERNEL);
|
||||
|
||||
if (!cma_dev_group) {
|
||||
err = -ENOMEM;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
strncpy(cma_dev_group->name, name, sizeof(cma_dev_group->name));
|
||||
|
||||
err = make_cma_ports(cma_dev_group, cma_dev);
|
||||
if (err)
|
||||
goto fail;
|
||||
|
||||
cma_dev_group->ports_group.default_groups =
|
||||
cma_dev_group->default_ports_group;
|
||||
config_group_init_type_name(&cma_dev_group->ports_group, "ports",
|
||||
&cma_ports_group_type);
|
||||
|
||||
cma_dev_group->device_group.default_groups
|
||||
= cma_dev_group->default_dev_group;
|
||||
cma_dev_group->default_dev_group[0] = &cma_dev_group->ports_group;
|
||||
cma_dev_group->default_dev_group[1] = NULL;
|
||||
|
||||
config_group_init_type_name(&cma_dev_group->device_group, name,
|
||||
&cma_device_group_type);
|
||||
|
||||
cma_deref_dev(cma_dev);
|
||||
return &cma_dev_group->device_group;
|
||||
|
||||
fail:
|
||||
if (cma_dev)
|
||||
cma_deref_dev(cma_dev);
|
||||
kfree(cma_dev_group);
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
|
||||
static struct configfs_group_operations cma_subsys_group_ops = {
|
||||
.make_group = make_cma_dev,
|
||||
};
|
||||
|
||||
static struct config_item_type cma_subsys_type = {
|
||||
.ct_group_ops = &cma_subsys_group_ops,
|
||||
.ct_owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
static struct configfs_subsystem cma_subsys = {
|
||||
.su_group = {
|
||||
.cg_item = {
|
||||
.ci_namebuf = "rdma_cm",
|
||||
.ci_type = &cma_subsys_type,
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
int __init cma_configfs_init(void)
|
||||
{
|
||||
config_group_init(&cma_subsys.su_group);
|
||||
mutex_init(&cma_subsys.su_mutex);
|
||||
return configfs_register_subsystem(&cma_subsys);
|
||||
}
|
||||
|
||||
void __exit cma_configfs_exit(void)
|
||||
{
|
||||
configfs_unregister_subsystem(&cma_subsys);
|
||||
}
|
||||
@ -38,9 +38,31 @@
|
||||
|
||||
#include <rdma/ib_verbs.h>
|
||||
|
||||
#if IS_ENABLED(CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS)
|
||||
int cma_configfs_init(void);
|
||||
void cma_configfs_exit(void);
|
||||
#else
|
||||
static inline int cma_configfs_init(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void cma_configfs_exit(void)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
struct cma_device;
|
||||
void cma_ref_dev(struct cma_device *cma_dev);
|
||||
void cma_deref_dev(struct cma_device *cma_dev);
|
||||
typedef bool (*cma_device_filter)(struct ib_device *, void *);
|
||||
struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
|
||||
void *cookie);
|
||||
int cma_get_default_gid_type(struct cma_device *cma_dev,
|
||||
unsigned int port);
|
||||
int cma_set_default_gid_type(struct cma_device *cma_dev,
|
||||
unsigned int port,
|
||||
enum ib_gid_type default_gid_type);
|
||||
struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev);
|
||||
|
||||
int ib_device_register_sysfs(struct ib_device *device,
|
||||
int (*port_callback)(struct ib_device *,
|
||||
@ -74,6 +96,8 @@ enum ib_cache_gid_default_mode {
|
||||
IB_CACHE_GID_DEFAULT_MODE_DELETE
|
||||
};
|
||||
|
||||
int ib_cache_gid_parse_type_str(const char *buf);
|
||||
|
||||
const char *ib_cache_gid_type_str(enum ib_gid_type gid_type);
|
||||
|
||||
void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user