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author | 2017-04-09 10:15:57 -0700 | |
---|---|---|
committer | 2017-04-28 13:48:01 -0400 | |
commit | aad9ff97ddd774f03f5e055ade2b2d27a9c82ddb (patch) | |
tree | 227530073b852b7f938056d0f278a6f36c293473 /drivers/infiniband/sw | |
parent | IB/core: For multicast functions, verify that LIDs are multicast LIDs (diff) | |
download | linux-aad9ff97ddd774f03f5e055ade2b2d27a9c82ddb.tar.gz linux-aad9ff97ddd774f03f5e055ade2b2d27a9c82ddb.tar.bz2 linux-aad9ff97ddd774f03f5e055ade2b2d27a9c82ddb.zip |
IB/rdmavt/hfi1/qib: Use the MGID and MLID for multicast addressing
The Infiniband spec defines "A multicast address is defined by a
MGID and a MLID" (section 10.5).
The current code only uses the MGID for identifying multicast groups.
Update the driver to be compliant with this definition.
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/sw')
-rw-r--r-- | drivers/infiniband/sw/rdmavt/mcast.c | 61 |
1 files changed, 44 insertions, 17 deletions
diff --git a/drivers/infiniband/sw/rdmavt/mcast.c b/drivers/infiniband/sw/rdmavt/mcast.c index 05c8c2afb0e3..1f12b69a0d07 100644 --- a/drivers/infiniband/sw/rdmavt/mcast.c +++ b/drivers/infiniband/sw/rdmavt/mcast.c @@ -100,10 +100,11 @@ static void rvt_mcast_qp_free(struct rvt_mcast_qp *mqp) /** * mcast_alloc - allocate the multicast GID structure * @mgid: the multicast GID + * @lid: the muilticast LID (host order) * * A list of QPs will be attached to this structure. */ -static struct rvt_mcast *rvt_mcast_alloc(union ib_gid *mgid) +static struct rvt_mcast *rvt_mcast_alloc(union ib_gid *mgid, u16 lid) { struct rvt_mcast *mcast; @@ -111,7 +112,9 @@ static struct rvt_mcast *rvt_mcast_alloc(union ib_gid *mgid) if (!mcast) goto bail; - mcast->mgid = *mgid; + mcast->mcast_addr.mgid = *mgid; + mcast->mcast_addr.lid = lid; + INIT_LIST_HEAD(&mcast->qp_list); init_waitqueue_head(&mcast->wait); atomic_set(&mcast->refcount, 0); @@ -131,15 +134,19 @@ static void rvt_mcast_free(struct rvt_mcast *mcast) } /** - * rvt_mcast_find - search the global table for the given multicast GID + * rvt_mcast_find - search the global table for the given multicast GID/LID + * NOTE: It is valid to have 1 MLID with multiple MGIDs. It is not valid + * to have 1 MGID with multiple MLIDs. * @ibp: the IB port structure * @mgid: the multicast GID to search for + * @lid: the multicast LID portion of the multicast address (host order) * * The caller is responsible for decrementing the reference count if found. * * Return: NULL if not found. */ -struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid) +struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid, + u16 lid) { struct rb_node *n; unsigned long flags; @@ -153,15 +160,18 @@ struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid) mcast = rb_entry(n, struct rvt_mcast, rb_node); - ret = memcmp(mgid->raw, mcast->mgid.raw, - sizeof(union ib_gid)); + ret = memcmp(mgid->raw, mcast->mcast_addr.mgid.raw, + sizeof(*mgid)); if (ret < 0) { n = n->rb_left; } else if (ret > 0) { n = n->rb_right; } else { - atomic_inc(&mcast->refcount); - found = mcast; + /* MGID/MLID must match */ + if (mcast->mcast_addr.lid == lid) { + atomic_inc(&mcast->refcount); + found = mcast; + } break; } } @@ -177,7 +187,8 @@ EXPORT_SYMBOL(rvt_mcast_find); * * Return: zero if both were added. Return EEXIST if the GID was already in * the table but the QP was added. Return ESRCH if the QP was already - * attached and neither structure was added. + * attached and neither structure was added. Return EINVAL if the MGID was + * found, but the MLID did NOT match. */ static int rvt_mcast_add(struct rvt_dev_info *rdi, struct rvt_ibport *ibp, struct rvt_mcast *mcast, struct rvt_mcast_qp *mqp) @@ -195,8 +206,9 @@ static int rvt_mcast_add(struct rvt_dev_info *rdi, struct rvt_ibport *ibp, pn = *n; tmcast = rb_entry(pn, struct rvt_mcast, rb_node); - ret = memcmp(mcast->mgid.raw, tmcast->mgid.raw, - sizeof(union ib_gid)); + ret = memcmp(mcast->mcast_addr.mgid.raw, + tmcast->mcast_addr.mgid.raw, + sizeof(mcast->mcast_addr.mgid)); if (ret < 0) { n = &pn->rb_left; continue; @@ -206,6 +218,11 @@ static int rvt_mcast_add(struct rvt_dev_info *rdi, struct rvt_ibport *ibp, continue; } + if (tmcast->mcast_addr.lid != mcast->mcast_addr.lid) { + ret = EINVAL; + goto bail; + } + /* Search the QP list to see if this is already there. */ list_for_each_entry_rcu(p, &tmcast->qp_list, list) { if (p->qp == mqp->qp) { @@ -276,7 +293,7 @@ int rvt_attach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) * Allocate data structures since its better to do this outside of * spin locks and it will most likely be needed. */ - mcast = rvt_mcast_alloc(gid); + mcast = rvt_mcast_alloc(gid, lid); if (!mcast) return -ENOMEM; @@ -296,6 +313,10 @@ int rvt_attach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) /* Exceeded the maximum number of mcast groups. */ ret = -ENOMEM; goto bail_mqp; + case EINVAL: + /* Invalid MGID/MLID pair */ + ret = -EINVAL; + goto bail_mqp; default: break; } @@ -344,14 +365,20 @@ int rvt_detach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) } mcast = rb_entry(n, struct rvt_mcast, rb_node); - ret = memcmp(gid->raw, mcast->mgid.raw, - sizeof(union ib_gid)); - if (ret < 0) + ret = memcmp(gid->raw, mcast->mcast_addr.mgid.raw, + sizeof(*gid)); + if (ret < 0) { n = n->rb_left; - else if (ret > 0) + } else if (ret > 0) { n = n->rb_right; - else + } else { + /* MGID/MLID must match */ + if (mcast->mcast_addr.lid != lid) { + spin_unlock_irq(&ibp->lock); + return -EINVAL; + } break; + } } /* Search the QP list. */ |