[IB] uverbs: ABI-breaking fixes for userspace verbs
Introduce new userspace verbs ABI version 3. This eliminates some unneeded commands, and adds support for user-created completion channels. This cleans up problems with file leaks on error paths, and also makes sure that file descriptors are always installed into the correct process. Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier
Родитель
33033b7972
Коммит
6b73597e70
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@ -53,14 +53,14 @@ struct ib_uverbs_device {
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struct cdev dev;
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struct class_device class_dev;
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struct ib_device *ib_dev;
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int num_comp;
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int num_comp_vectors;
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};
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struct ib_uverbs_event_file {
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struct kref ref;
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struct file *file;
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struct ib_uverbs_file *uverbs_file;
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spinlock_t lock;
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int fd;
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int is_async;
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wait_queue_head_t poll_wait;
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struct fasync_struct *async_queue;
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@ -73,8 +73,7 @@ struct ib_uverbs_file {
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struct ib_uverbs_device *device;
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struct ib_ucontext *ucontext;
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struct ib_event_handler event_handler;
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struct ib_uverbs_event_file async_file;
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struct ib_uverbs_event_file comp_file[1];
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struct ib_uverbs_event_file *async_file;
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};
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struct ib_uverbs_event {
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@ -110,10 +109,17 @@ extern struct idr ib_uverbs_cq_idr;
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extern struct idr ib_uverbs_qp_idr;
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extern struct idr ib_uverbs_srq_idr;
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struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
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int is_async, int *fd);
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void ib_uverbs_release_event_file(struct kref *ref);
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struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd);
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void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
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void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
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void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
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void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
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void ib_uverbs_event_handler(struct ib_event_handler *handler,
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struct ib_event *event);
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int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
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void *addr, size_t size, int write);
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@ -125,16 +131,14 @@ void ib_umem_release_on_close(struct ib_device *dev, struct ib_umem *umem);
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const char __user *buf, int in_len, \
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int out_len)
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IB_UVERBS_DECLARE_CMD(query_params);
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IB_UVERBS_DECLARE_CMD(get_context);
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IB_UVERBS_DECLARE_CMD(query_device);
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IB_UVERBS_DECLARE_CMD(query_port);
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IB_UVERBS_DECLARE_CMD(query_gid);
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IB_UVERBS_DECLARE_CMD(query_pkey);
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IB_UVERBS_DECLARE_CMD(alloc_pd);
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IB_UVERBS_DECLARE_CMD(dealloc_pd);
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IB_UVERBS_DECLARE_CMD(reg_mr);
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IB_UVERBS_DECLARE_CMD(dereg_mr);
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IB_UVERBS_DECLARE_CMD(create_comp_channel);
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IB_UVERBS_DECLARE_CMD(create_cq);
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IB_UVERBS_DECLARE_CMD(destroy_cq);
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IB_UVERBS_DECLARE_CMD(create_qp);
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@ -33,6 +33,8 @@
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* $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
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*/
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#include <linux/file.h>
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#include <asm/uaccess.h>
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#include "uverbs.h"
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@ -45,29 +47,6 @@
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(udata)->outlen = (olen); \
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} while (0)
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ssize_t ib_uverbs_query_params(struct ib_uverbs_file *file,
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const char __user *buf,
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int in_len, int out_len)
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{
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struct ib_uverbs_query_params cmd;
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struct ib_uverbs_query_params_resp resp;
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if (out_len < sizeof resp)
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return -ENOSPC;
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if (copy_from_user(&cmd, buf, sizeof cmd))
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return -EFAULT;
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memset(&resp, 0, sizeof resp);
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resp.num_cq_events = file->device->num_comp;
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if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp))
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return -EFAULT;
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return in_len;
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}
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ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
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const char __user *buf,
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int in_len, int out_len)
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@ -77,7 +56,7 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
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struct ib_udata udata;
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struct ib_device *ibdev = file->device->ib_dev;
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struct ib_ucontext *ucontext;
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int i;
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struct file *filp;
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int ret;
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if (out_len < sizeof resp)
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@ -110,26 +89,42 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
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INIT_LIST_HEAD(&ucontext->srq_list);
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INIT_LIST_HEAD(&ucontext->ah_list);
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resp.async_fd = file->async_file.fd;
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for (i = 0; i < file->device->num_comp; ++i)
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if (copy_to_user((void __user *) (unsigned long) cmd.cq_fd_tab +
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i * sizeof (__u32),
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&file->comp_file[i].fd, sizeof (__u32))) {
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ret = -EFAULT;
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goto err_free;
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}
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resp.num_comp_vectors = file->device->num_comp_vectors;
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filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
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if (IS_ERR(filp)) {
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ret = PTR_ERR(filp);
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goto err_free;
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}
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if (copy_to_user((void __user *) (unsigned long) cmd.response,
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&resp, sizeof resp)) {
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ret = -EFAULT;
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goto err_free;
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goto err_file;
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}
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file->ucontext = ucontext;
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file->async_file = filp->private_data;
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INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
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ib_uverbs_event_handler);
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ret = ib_register_event_handler(&file->event_handler);
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if (ret)
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goto err_file;
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kref_get(&file->async_file->ref);
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kref_get(&file->ref);
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file->ucontext = ucontext;
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fd_install(resp.async_fd, filp);
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up(&file->mutex);
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return in_len;
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err_file:
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put_unused_fd(resp.async_fd);
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fput(filp);
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err_free:
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ibdev->dealloc_ucontext(ucontext);
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@ -255,62 +250,6 @@ ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
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return in_len;
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}
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ssize_t ib_uverbs_query_gid(struct ib_uverbs_file *file,
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const char __user *buf,
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int in_len, int out_len)
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{
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struct ib_uverbs_query_gid cmd;
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struct ib_uverbs_query_gid_resp resp;
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int ret;
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if (out_len < sizeof resp)
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return -ENOSPC;
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if (copy_from_user(&cmd, buf, sizeof cmd))
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return -EFAULT;
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memset(&resp, 0, sizeof resp);
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ret = ib_query_gid(file->device->ib_dev, cmd.port_num, cmd.index,
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(union ib_gid *) resp.gid);
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if (ret)
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return ret;
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if (copy_to_user((void __user *) (unsigned long) cmd.response,
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&resp, sizeof resp))
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return -EFAULT;
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return in_len;
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}
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ssize_t ib_uverbs_query_pkey(struct ib_uverbs_file *file,
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const char __user *buf,
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int in_len, int out_len)
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{
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struct ib_uverbs_query_pkey cmd;
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struct ib_uverbs_query_pkey_resp resp;
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int ret;
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if (out_len < sizeof resp)
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return -ENOSPC;
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if (copy_from_user(&cmd, buf, sizeof cmd))
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return -EFAULT;
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memset(&resp, 0, sizeof resp);
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ret = ib_query_pkey(file->device->ib_dev, cmd.port_num, cmd.index,
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&resp.pkey);
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if (ret)
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return ret;
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if (copy_to_user((void __user *) (unsigned long) cmd.response,
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&resp, sizeof resp))
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return -EFAULT;
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return in_len;
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}
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ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
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const char __user *buf,
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int in_len, int out_len)
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@ -595,6 +534,35 @@ out:
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return ret ? ret : in_len;
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}
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ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
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const char __user *buf, int in_len,
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int out_len)
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{
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struct ib_uverbs_create_comp_channel cmd;
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struct ib_uverbs_create_comp_channel_resp resp;
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struct file *filp;
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if (out_len < sizeof resp)
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return -ENOSPC;
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if (copy_from_user(&cmd, buf, sizeof cmd))
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return -EFAULT;
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filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
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if (IS_ERR(filp))
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return PTR_ERR(filp);
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if (copy_to_user((void __user *) (unsigned long) cmd.response,
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&resp, sizeof resp)) {
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put_unused_fd(resp.fd);
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fput(filp);
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return -EFAULT;
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}
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fd_install(resp.fd, filp);
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return in_len;
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}
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ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
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const char __user *buf, int in_len,
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int out_len)
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@ -603,6 +571,7 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
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struct ib_uverbs_create_cq_resp resp;
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struct ib_udata udata;
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struct ib_ucq_object *uobj;
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struct ib_uverbs_event_file *ev_file = NULL;
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struct ib_cq *cq;
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int ret;
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@ -616,9 +585,12 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
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(unsigned long) cmd.response + sizeof resp,
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in_len - sizeof cmd, out_len - sizeof resp);
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if (cmd.event_handler >= file->device->num_comp)
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if (cmd.comp_vector >= file->device->num_comp_vectors)
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return -EINVAL;
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if (cmd.comp_channel >= 0)
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ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
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uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
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if (!uobj)
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return -ENOMEM;
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@ -641,7 +613,7 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
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cq->uobject = &uobj->uobject;
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cq->comp_handler = ib_uverbs_comp_handler;
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cq->event_handler = ib_uverbs_cq_event_handler;
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cq->cq_context = file;
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cq->cq_context = ev_file;
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atomic_set(&cq->usecnt, 0);
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retry:
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@ -700,6 +672,7 @@ ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
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struct ib_uverbs_destroy_cq_resp resp;
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struct ib_cq *cq;
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struct ib_ucq_object *uobj;
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struct ib_uverbs_event_file *ev_file;
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struct ib_uverbs_event *evt, *tmp;
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u64 user_handle;
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int ret = -EINVAL;
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@ -716,7 +689,8 @@ ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
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goto out;
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user_handle = cq->uobject->user_handle;
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uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
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uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
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ev_file = cq->cq_context;
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ret = ib_destroy_cq(cq);
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if (ret)
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@ -728,19 +702,23 @@ ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
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list_del(&uobj->uobject.list);
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up(&file->mutex);
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spin_lock_irq(&file->comp_file[0].lock);
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list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
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list_del(&evt->list);
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kfree(evt);
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}
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spin_unlock_irq(&file->comp_file[0].lock);
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if (ev_file) {
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spin_lock_irq(&ev_file->lock);
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list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
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list_del(&evt->list);
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kfree(evt);
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}
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spin_unlock_irq(&ev_file->lock);
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spin_lock_irq(&file->async_file.lock);
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kref_put(&ev_file->ref, ib_uverbs_release_event_file);
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}
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spin_lock_irq(&file->async_file->lock);
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list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
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list_del(&evt->list);
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kfree(evt);
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}
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spin_unlock_irq(&file->async_file.lock);
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spin_unlock_irq(&file->async_file->lock);
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resp.comp_events_reported = uobj->comp_events_reported;
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resp.async_events_reported = uobj->async_events_reported;
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@ -1005,12 +983,12 @@ ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
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list_del(&uobj->uobject.list);
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up(&file->mutex);
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spin_lock_irq(&file->async_file.lock);
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spin_lock_irq(&file->async_file->lock);
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list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
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list_del(&evt->list);
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kfree(evt);
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}
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spin_unlock_irq(&file->async_file.lock);
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spin_unlock_irq(&file->async_file->lock);
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resp.events_reported = uobj->events_reported;
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@ -1243,12 +1221,12 @@ ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
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list_del(&uobj->uobject.list);
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up(&file->mutex);
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spin_lock_irq(&file->async_file.lock);
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spin_lock_irq(&file->async_file->lock);
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list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
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list_del(&evt->list);
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kfree(evt);
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}
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spin_unlock_irq(&file->async_file.lock);
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spin_unlock_irq(&file->async_file->lock);
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resp.events_reported = uobj->events_reported;
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@ -77,26 +77,24 @@ static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
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static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
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const char __user *buf, int in_len,
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int out_len) = {
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[IB_USER_VERBS_CMD_QUERY_PARAMS] = ib_uverbs_query_params,
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[IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
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[IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
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[IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
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[IB_USER_VERBS_CMD_QUERY_GID] = ib_uverbs_query_gid,
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[IB_USER_VERBS_CMD_QUERY_PKEY] = ib_uverbs_query_pkey,
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[IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
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[IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
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[IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
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[IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
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[IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
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[IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
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[IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
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[IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
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[IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
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[IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
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[IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
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[IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
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[IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
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[IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
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[IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
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[IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
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[IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
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||||
[IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
|
||||
[IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
|
||||
[IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
|
||||
[IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
|
||||
[IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
|
||||
[IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
|
||||
[IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
|
||||
[IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
|
||||
[IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
|
||||
[IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
|
||||
[IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
|
||||
[IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
|
||||
[IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
|
||||
[IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
|
||||
[IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
|
||||
};
|
||||
|
||||
static struct vfsmount *uverbs_event_mnt;
|
||||
|
|
@ -188,25 +186,19 @@ static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
|
|||
|
||||
spin_lock_irq(&file->lock);
|
||||
|
||||
while (list_empty(&file->event_list) && file->fd >= 0) {
|
||||
while (list_empty(&file->event_list)) {
|
||||
spin_unlock_irq(&file->lock);
|
||||
|
||||
if (filp->f_flags & O_NONBLOCK)
|
||||
return -EAGAIN;
|
||||
|
||||
if (wait_event_interruptible(file->poll_wait,
|
||||
!list_empty(&file->event_list) ||
|
||||
file->fd < 0))
|
||||
!list_empty(&file->event_list)))
|
||||
return -ERESTARTSYS;
|
||||
|
||||
spin_lock_irq(&file->lock);
|
||||
}
|
||||
|
||||
if (file->fd < 0) {
|
||||
spin_unlock_irq(&file->lock);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
|
||||
|
||||
if (file->is_async)
|
||||
|
|
@ -248,26 +240,19 @@ static unsigned int ib_uverbs_event_poll(struct file *filp,
|
|||
poll_wait(filp, &file->poll_wait, wait);
|
||||
|
||||
spin_lock_irq(&file->lock);
|
||||
if (file->fd < 0)
|
||||
pollflags = POLLERR;
|
||||
else if (!list_empty(&file->event_list))
|
||||
if (!list_empty(&file->event_list))
|
||||
pollflags = POLLIN | POLLRDNORM;
|
||||
spin_unlock_irq(&file->lock);
|
||||
|
||||
return pollflags;
|
||||
}
|
||||
|
||||
static void ib_uverbs_event_release(struct ib_uverbs_event_file *file)
|
||||
void ib_uverbs_release_event_file(struct kref *ref)
|
||||
{
|
||||
struct ib_uverbs_event *entry, *tmp;
|
||||
struct ib_uverbs_event_file *file =
|
||||
container_of(ref, struct ib_uverbs_event_file, ref);
|
||||
|
||||
spin_lock_irq(&file->lock);
|
||||
if (file->fd != -1) {
|
||||
file->fd = -1;
|
||||
list_for_each_entry_safe(entry, tmp, &file->event_list, list)
|
||||
kfree(entry);
|
||||
}
|
||||
spin_unlock_irq(&file->lock);
|
||||
kfree(file);
|
||||
}
|
||||
|
||||
static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
|
||||
|
|
@ -280,21 +265,30 @@ static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
|
|||
static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
|
||||
{
|
||||
struct ib_uverbs_event_file *file = filp->private_data;
|
||||
struct ib_uverbs_event *entry, *tmp;
|
||||
|
||||
spin_lock_irq(&file->lock);
|
||||
file->file = NULL;
|
||||
list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
|
||||
if (entry->counter)
|
||||
list_del(&entry->obj_list);
|
||||
kfree(entry);
|
||||
}
|
||||
spin_unlock_irq(&file->lock);
|
||||
|
||||
ib_uverbs_event_release(file);
|
||||
ib_uverbs_event_fasync(-1, filp, 0);
|
||||
kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
|
||||
|
||||
if (file->is_async) {
|
||||
ib_unregister_event_handler(&file->uverbs_file->event_handler);
|
||||
kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
|
||||
}
|
||||
kref_put(&file->ref, ib_uverbs_release_event_file);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct file_operations uverbs_event_fops = {
|
||||
/*
|
||||
* No .owner field since we artificially create event files,
|
||||
* so there is no increment to the module reference count in
|
||||
* the open path. All event files come from a uverbs command
|
||||
* file, which already takes a module reference, so this is OK.
|
||||
*/
|
||||
.owner = THIS_MODULE,
|
||||
.read = ib_uverbs_event_read,
|
||||
.poll = ib_uverbs_event_poll,
|
||||
.release = ib_uverbs_event_close,
|
||||
|
|
@ -303,10 +297,19 @@ static struct file_operations uverbs_event_fops = {
|
|||
|
||||
void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
|
||||
{
|
||||
struct ib_uverbs_file *file = cq_context;
|
||||
struct ib_ucq_object *uobj;
|
||||
struct ib_uverbs_event *entry;
|
||||
unsigned long flags;
|
||||
struct ib_uverbs_event_file *file = cq_context;
|
||||
struct ib_ucq_object *uobj;
|
||||
struct ib_uverbs_event *entry;
|
||||
unsigned long flags;
|
||||
|
||||
if (!file)
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&file->lock, flags);
|
||||
if (!file->file) {
|
||||
spin_unlock_irqrestore(&file->lock, flags);
|
||||
return;
|
||||
}
|
||||
|
||||
entry = kmalloc(sizeof *entry, GFP_ATOMIC);
|
||||
if (!entry)
|
||||
|
|
@ -317,13 +320,12 @@ void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
|
|||
entry->desc.comp.cq_handle = cq->uobject->user_handle;
|
||||
entry->counter = &uobj->comp_events_reported;
|
||||
|
||||
spin_lock_irqsave(&file->comp_file[0].lock, flags);
|
||||
list_add_tail(&entry->list, &file->comp_file[0].event_list);
|
||||
list_add_tail(&entry->list, &file->event_list);
|
||||
list_add_tail(&entry->obj_list, &uobj->comp_list);
|
||||
spin_unlock_irqrestore(&file->comp_file[0].lock, flags);
|
||||
spin_unlock_irqrestore(&file->lock, flags);
|
||||
|
||||
wake_up_interruptible(&file->comp_file[0].poll_wait);
|
||||
kill_fasync(&file->comp_file[0].async_queue, SIGIO, POLL_IN);
|
||||
wake_up_interruptible(&file->poll_wait);
|
||||
kill_fasync(&file->async_queue, SIGIO, POLL_IN);
|
||||
}
|
||||
|
||||
static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
|
||||
|
|
@ -334,6 +336,12 @@ static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
|
|||
struct ib_uverbs_event *entry;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&file->async_file->lock, flags);
|
||||
if (!file->async_file->file) {
|
||||
spin_unlock_irqrestore(&file->async_file->lock, flags);
|
||||
return;
|
||||
}
|
||||
|
||||
entry = kmalloc(sizeof *entry, GFP_ATOMIC);
|
||||
if (!entry)
|
||||
return;
|
||||
|
|
@ -342,24 +350,24 @@ static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
|
|||
entry->desc.async.event_type = event;
|
||||
entry->counter = counter;
|
||||
|
||||
spin_lock_irqsave(&file->async_file.lock, flags);
|
||||
list_add_tail(&entry->list, &file->async_file.event_list);
|
||||
list_add_tail(&entry->list, &file->async_file->event_list);
|
||||
if (obj_list)
|
||||
list_add_tail(&entry->obj_list, obj_list);
|
||||
spin_unlock_irqrestore(&file->async_file.lock, flags);
|
||||
spin_unlock_irqrestore(&file->async_file->lock, flags);
|
||||
|
||||
wake_up_interruptible(&file->async_file.poll_wait);
|
||||
kill_fasync(&file->async_file.async_queue, SIGIO, POLL_IN);
|
||||
wake_up_interruptible(&file->async_file->poll_wait);
|
||||
kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
|
||||
}
|
||||
|
||||
void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
|
||||
{
|
||||
struct ib_uverbs_event_file *ev_file = context_ptr;
|
||||
struct ib_ucq_object *uobj;
|
||||
|
||||
uobj = container_of(event->element.cq->uobject,
|
||||
struct ib_ucq_object, uobject);
|
||||
|
||||
ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
|
||||
ib_uverbs_async_handler(ev_file->uverbs_file, uobj->uobject.user_handle,
|
||||
event->event, &uobj->async_list,
|
||||
&uobj->async_events_reported);
|
||||
|
||||
|
|
@ -389,8 +397,8 @@ void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
|
|||
&uobj->events_reported);
|
||||
}
|
||||
|
||||
static void ib_uverbs_event_handler(struct ib_event_handler *handler,
|
||||
struct ib_event *event)
|
||||
void ib_uverbs_event_handler(struct ib_event_handler *handler,
|
||||
struct ib_event *event)
|
||||
{
|
||||
struct ib_uverbs_file *file =
|
||||
container_of(handler, struct ib_uverbs_file, event_handler);
|
||||
|
|
@ -399,38 +407,90 @@ static void ib_uverbs_event_handler(struct ib_event_handler *handler,
|
|||
NULL, NULL);
|
||||
}
|
||||
|
||||
static int ib_uverbs_event_init(struct ib_uverbs_event_file *file,
|
||||
struct ib_uverbs_file *uverbs_file)
|
||||
struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
|
||||
int is_async, int *fd)
|
||||
{
|
||||
struct ib_uverbs_event_file *ev_file;
|
||||
struct file *filp;
|
||||
int ret;
|
||||
|
||||
spin_lock_init(&file->lock);
|
||||
INIT_LIST_HEAD(&file->event_list);
|
||||
init_waitqueue_head(&file->poll_wait);
|
||||
file->uverbs_file = uverbs_file;
|
||||
file->async_queue = NULL;
|
||||
ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
|
||||
if (!ev_file)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
file->fd = get_unused_fd();
|
||||
if (file->fd < 0)
|
||||
return file->fd;
|
||||
kref_init(&ev_file->ref);
|
||||
spin_lock_init(&ev_file->lock);
|
||||
INIT_LIST_HEAD(&ev_file->event_list);
|
||||
init_waitqueue_head(&ev_file->poll_wait);
|
||||
ev_file->uverbs_file = uverbs_file;
|
||||
ev_file->async_queue = NULL;
|
||||
ev_file->is_async = is_async;
|
||||
|
||||
*fd = get_unused_fd();
|
||||
if (*fd < 0) {
|
||||
ret = *fd;
|
||||
goto err;
|
||||
}
|
||||
|
||||
filp = get_empty_filp();
|
||||
if (!filp) {
|
||||
put_unused_fd(file->fd);
|
||||
return -ENFILE;
|
||||
ret = -ENFILE;
|
||||
goto err_fd;
|
||||
}
|
||||
|
||||
filp->f_op = &uverbs_event_fops;
|
||||
ev_file->file = filp;
|
||||
|
||||
/*
|
||||
* fops_get() can't fail here, because we're coming from a
|
||||
* system call on a uverbs file, which will already have a
|
||||
* module reference.
|
||||
*/
|
||||
filp->f_op = fops_get(&uverbs_event_fops);
|
||||
filp->f_vfsmnt = mntget(uverbs_event_mnt);
|
||||
filp->f_dentry = dget(uverbs_event_mnt->mnt_root);
|
||||
filp->f_mapping = filp->f_dentry->d_inode->i_mapping;
|
||||
filp->f_flags = O_RDONLY;
|
||||
filp->f_mode = FMODE_READ;
|
||||
filp->private_data = file;
|
||||
filp->private_data = ev_file;
|
||||
|
||||
fd_install(file->fd, filp);
|
||||
return filp;
|
||||
|
||||
return 0;
|
||||
err_fd:
|
||||
put_unused_fd(*fd);
|
||||
|
||||
err:
|
||||
kfree(ev_file);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
|
||||
/*
|
||||
* Look up a completion event file by FD. If lookup is successful,
|
||||
* takes a ref to the event file struct that it returns; if
|
||||
* unsuccessful, returns NULL.
|
||||
*/
|
||||
struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
|
||||
{
|
||||
struct ib_uverbs_event_file *ev_file = NULL;
|
||||
struct file *filp;
|
||||
|
||||
filp = fget(fd);
|
||||
if (!filp)
|
||||
return NULL;
|
||||
|
||||
if (filp->f_op != &uverbs_event_fops)
|
||||
goto out;
|
||||
|
||||
ev_file = filp->private_data;
|
||||
if (ev_file->is_async) {
|
||||
ev_file = NULL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
kref_get(&ev_file->ref);
|
||||
|
||||
out:
|
||||
fput(filp);
|
||||
return ev_file;
|
||||
}
|
||||
|
||||
static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
|
||||
|
|
@ -453,8 +513,7 @@ static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
|
|||
!uverbs_cmd_table[hdr.command])
|
||||
return -EINVAL;
|
||||
|
||||
if (!file->ucontext &&
|
||||
hdr.command != IB_USER_VERBS_CMD_QUERY_PARAMS &&
|
||||
if (!file->ucontext &&
|
||||
hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
|
||||
return -EINVAL;
|
||||
|
||||
|
|
@ -477,82 +536,33 @@ static int ib_uverbs_open(struct inode *inode, struct file *filp)
|
|||
struct ib_uverbs_device *dev =
|
||||
container_of(inode->i_cdev, struct ib_uverbs_device, dev);
|
||||
struct ib_uverbs_file *file;
|
||||
int i = 0;
|
||||
int ret;
|
||||
|
||||
if (!try_module_get(dev->ib_dev->owner))
|
||||
return -ENODEV;
|
||||
|
||||
file = kmalloc(sizeof *file +
|
||||
(dev->num_comp - 1) * sizeof (struct ib_uverbs_event_file),
|
||||
GFP_KERNEL);
|
||||
file = kmalloc(sizeof *file, GFP_KERNEL);
|
||||
if (!file) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
module_put(dev->ib_dev->owner);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
file->device = dev;
|
||||
file->device = dev;
|
||||
file->ucontext = NULL;
|
||||
kref_init(&file->ref);
|
||||
init_MUTEX(&file->mutex);
|
||||
|
||||
file->ucontext = NULL;
|
||||
|
||||
kref_get(&file->ref);
|
||||
ret = ib_uverbs_event_init(&file->async_file, file);
|
||||
if (ret)
|
||||
goto err_kref;
|
||||
|
||||
file->async_file.is_async = 1;
|
||||
|
||||
for (i = 0; i < dev->num_comp; ++i) {
|
||||
kref_get(&file->ref);
|
||||
ret = ib_uverbs_event_init(&file->comp_file[i], file);
|
||||
if (ret)
|
||||
goto err_async;
|
||||
file->comp_file[i].is_async = 0;
|
||||
}
|
||||
|
||||
|
||||
filp->private_data = file;
|
||||
|
||||
INIT_IB_EVENT_HANDLER(&file->event_handler, dev->ib_dev,
|
||||
ib_uverbs_event_handler);
|
||||
if (ib_register_event_handler(&file->event_handler))
|
||||
goto err_async;
|
||||
|
||||
return 0;
|
||||
|
||||
err_async:
|
||||
while (i--)
|
||||
ib_uverbs_event_release(&file->comp_file[i]);
|
||||
|
||||
ib_uverbs_event_release(&file->async_file);
|
||||
|
||||
err_kref:
|
||||
/*
|
||||
* One extra kref_put() because we took a reference before the
|
||||
* event file creation that failed and got us here.
|
||||
*/
|
||||
kref_put(&file->ref, ib_uverbs_release_file);
|
||||
kref_put(&file->ref, ib_uverbs_release_file);
|
||||
|
||||
err:
|
||||
module_put(dev->ib_dev->owner);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ib_uverbs_close(struct inode *inode, struct file *filp)
|
||||
{
|
||||
struct ib_uverbs_file *file = filp->private_data;
|
||||
int i;
|
||||
|
||||
ib_unregister_event_handler(&file->event_handler);
|
||||
ib_uverbs_event_release(&file->async_file);
|
||||
ib_dealloc_ucontext(file->ucontext);
|
||||
|
||||
for (i = 0; i < file->device->num_comp; ++i)
|
||||
ib_uverbs_event_release(&file->comp_file[i]);
|
||||
|
||||
kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
|
||||
kref_put(&file->ref, ib_uverbs_release_file);
|
||||
|
||||
return 0;
|
||||
|
|
@ -631,8 +641,8 @@ static void ib_uverbs_add_one(struct ib_device *device)
|
|||
set_bit(uverbs_dev->devnum, dev_map);
|
||||
spin_unlock(&map_lock);
|
||||
|
||||
uverbs_dev->ib_dev = device;
|
||||
uverbs_dev->num_comp = 1;
|
||||
uverbs_dev->ib_dev = device;
|
||||
uverbs_dev->num_comp_vectors = 1;
|
||||
|
||||
if (device->mmap)
|
||||
cdev_init(&uverbs_dev->dev, &uverbs_mmap_fops);
|
||||
|
|
|
|||
|
|
@ -42,15 +42,12 @@
|
|||
* Increment this value if any changes that break userspace ABI
|
||||
* compatibility are made.
|
||||
*/
|
||||
#define IB_USER_VERBS_ABI_VERSION 2
|
||||
#define IB_USER_VERBS_ABI_VERSION 3
|
||||
|
||||
enum {
|
||||
IB_USER_VERBS_CMD_QUERY_PARAMS,
|
||||
IB_USER_VERBS_CMD_GET_CONTEXT,
|
||||
IB_USER_VERBS_CMD_QUERY_DEVICE,
|
||||
IB_USER_VERBS_CMD_QUERY_PORT,
|
||||
IB_USER_VERBS_CMD_QUERY_GID,
|
||||
IB_USER_VERBS_CMD_QUERY_PKEY,
|
||||
IB_USER_VERBS_CMD_ALLOC_PD,
|
||||
IB_USER_VERBS_CMD_DEALLOC_PD,
|
||||
IB_USER_VERBS_CMD_CREATE_AH,
|
||||
|
|
@ -65,6 +62,7 @@ enum {
|
|||
IB_USER_VERBS_CMD_ALLOC_MW,
|
||||
IB_USER_VERBS_CMD_BIND_MW,
|
||||
IB_USER_VERBS_CMD_DEALLOC_MW,
|
||||
IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
|
||||
IB_USER_VERBS_CMD_CREATE_CQ,
|
||||
IB_USER_VERBS_CMD_RESIZE_CQ,
|
||||
IB_USER_VERBS_CMD_DESTROY_CQ,
|
||||
|
|
@ -118,27 +116,14 @@ struct ib_uverbs_cmd_hdr {
|
|||
__u16 out_words;
|
||||
};
|
||||
|
||||
/*
|
||||
* No driver_data for "query params" command, since this is intended
|
||||
* to be a core function with no possible device dependence.
|
||||
*/
|
||||
struct ib_uverbs_query_params {
|
||||
__u64 response;
|
||||
};
|
||||
|
||||
struct ib_uverbs_query_params_resp {
|
||||
__u32 num_cq_events;
|
||||
};
|
||||
|
||||
struct ib_uverbs_get_context {
|
||||
__u64 response;
|
||||
__u64 cq_fd_tab;
|
||||
__u64 driver_data[0];
|
||||
};
|
||||
|
||||
struct ib_uverbs_get_context_resp {
|
||||
__u32 async_fd;
|
||||
__u32 reserved;
|
||||
__u32 num_comp_vectors;
|
||||
};
|
||||
|
||||
struct ib_uverbs_query_device {
|
||||
|
|
@ -220,31 +205,6 @@ struct ib_uverbs_query_port_resp {
|
|||
__u8 reserved[3];
|
||||
};
|
||||
|
||||
struct ib_uverbs_query_gid {
|
||||
__u64 response;
|
||||
__u8 port_num;
|
||||
__u8 index;
|
||||
__u8 reserved[6];
|
||||
__u64 driver_data[0];
|
||||
};
|
||||
|
||||
struct ib_uverbs_query_gid_resp {
|
||||
__u8 gid[16];
|
||||
};
|
||||
|
||||
struct ib_uverbs_query_pkey {
|
||||
__u64 response;
|
||||
__u8 port_num;
|
||||
__u8 index;
|
||||
__u8 reserved[6];
|
||||
__u64 driver_data[0];
|
||||
};
|
||||
|
||||
struct ib_uverbs_query_pkey_resp {
|
||||
__u16 pkey;
|
||||
__u16 reserved;
|
||||
};
|
||||
|
||||
struct ib_uverbs_alloc_pd {
|
||||
__u64 response;
|
||||
__u64 driver_data[0];
|
||||
|
|
@ -278,11 +238,21 @@ struct ib_uverbs_dereg_mr {
|
|||
__u32 mr_handle;
|
||||
};
|
||||
|
||||
struct ib_uverbs_create_comp_channel {
|
||||
__u64 response;
|
||||
};
|
||||
|
||||
struct ib_uverbs_create_comp_channel_resp {
|
||||
__u32 fd;
|
||||
};
|
||||
|
||||
struct ib_uverbs_create_cq {
|
||||
__u64 response;
|
||||
__u64 user_handle;
|
||||
__u32 cqe;
|
||||
__u32 event_handler;
|
||||
__u32 comp_vector;
|
||||
__s32 comp_channel;
|
||||
__u32 reserved;
|
||||
__u64 driver_data[0];
|
||||
};
|
||||
|
||||
|
|
|
|||
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