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Thu, 09 Jul 2026 02:55:38 -0700 (PDT) From: Jiri Pirko To: linux-rdma@vger.kernel.org Cc: cgroups@vger.kernel.org, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-kselftest@vger.kernel.org, jgg@ziepe.ca, leon@kernel.org, parav@nvidia.com, mbloch@nvidia.com, cmeiohas@nvidia.com, roman.gushchin@linux.dev, bvanassche@acm.org, zyjzyj2000@gmail.com, shuah@kernel.org, tj@kernel.org, mkoutny@suse.com, hannes@cmpxchg.org, alibuda@linux.alibaba.com, dust.li@linux.alibaba.com, sidraya@linux.ibm.com, wenjia@linux.ibm.com Subject: [PATCH rdma-next 01/13] RDMA/core: Pass the net namespace to the device name lookups Date: Thu, 9 Jul 2026 11:55:20 +0200 Message-ID: <20260709095532.855647-2-jiri@resnulli.us> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260709095532.855647-1-jiri@resnulli.us> References: <20260709095532.855647-1-jiri@resnulli.us> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jiri Pirko Prepare for per-netns RDMA device names by passing the target net namespace through the name lookup and allocation helpers. Keep current global uniqueness behaviour. Signed-off-by: Jiri Pirko --- drivers/infiniband/core/device.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index b8193e077a74..de610f52c9b2 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -351,7 +351,8 @@ void ib_device_put(struct ib_device *device) } EXPORT_SYMBOL(ib_device_put); -static struct ib_device *__ib_device_get_by_name(const char *name) +static struct ib_device *__ib_device_get_by_name(const char *name, + const struct net *net) { struct ib_device *device; unsigned long index; @@ -395,7 +396,7 @@ int ib_device_rename(struct ib_device *ibdev, const char *name) return 0; } - if (__ib_device_get_by_name(name)) { + if (__ib_device_get_by_name(name, rdma_dev_net(ibdev))) { up_write(&devices_rwsem); return -EEXIST; } @@ -435,7 +436,8 @@ int ib_device_set_dim(struct ib_device *ibdev, u8 use_dim) return 0; } -static int alloc_name(struct ib_device *ibdev, const char *name) +/* Pick a free index for the '%d' style @name pattern. */ +static int alloc_name_id(struct net *net, const char *name) { struct ib_device *device; unsigned long index; @@ -462,15 +464,22 @@ static int alloc_name(struct ib_device *ibdev, const char *name) } rc = ida_alloc(&inuse, GFP_KERNEL); - if (rc < 0) - goto out; - - rc = dev_set_name(&ibdev->dev, name, rc); out: ida_destroy(&inuse); return rc; } +static int alloc_name(struct ib_device *ibdev, const char *name) +{ + int id; + + id = alloc_name_id(rdma_dev_net(ibdev), name); + if (id < 0) + return id; + + return dev_set_name(&ibdev->dev, name, id); +} + static void ib_device_release(struct device *device) { struct ib_device *dev = container_of(device, struct ib_device, dev); @@ -1223,7 +1232,8 @@ static int assign_name(struct ib_device *device, const char *name) if (ret) goto out; - if (__ib_device_get_by_name(dev_name(&device->dev))) { + if (__ib_device_get_by_name(dev_name(&device->dev), + rdma_dev_net(device))) { ret = -ENFILE; goto out; } -- 2.54.0