resp.num_comp_vectors = file->device->num_comp_vectors;
- filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
+ ret = get_unused_fd();
+ if (ret < 0)
+ goto err_free;
+ resp.async_fd = ret;
+
+ filp = ib_uverbs_alloc_event_file(file, 1);
if (IS_ERR(filp)) {
ret = PTR_ERR(filp);
- goto err_free;
+ goto err_fd;
}
if (copy_to_user((void __user *) (unsigned long) cmd.response,
return in_len;
err_file:
- put_unused_fd(resp.async_fd);
fput(filp);
+err_fd:
+ put_unused_fd(resp.async_fd);
+
err_free:
ibdev->dealloc_ucontext(ucontext);
struct ib_uverbs_create_comp_channel cmd;
struct ib_uverbs_create_comp_channel_resp resp;
struct file *filp;
+ int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
- filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
- if (IS_ERR(filp))
+ ret = get_unused_fd();
+ if (ret < 0)
+ return ret;
+ resp.fd = ret;
+
+ filp = ib_uverbs_alloc_event_file(file, 0);
+ if (IS_ERR(filp)) {
+ put_unused_fd(resp.fd);
return PTR_ERR(filp);
+ }
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp)) {
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/sched.h>
+#include <linux/anon_inodes.h>
#include <linux/file.h>
-#include <linux/mount.h>
#include <linux/cdev.h>
#include <asm/uaccess.h>
MODULE_DESCRIPTION("InfiniBand userspace verbs access");
MODULE_LICENSE("Dual BSD/GPL");
-#define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
-
enum {
IB_UVERBS_MAJOR = 231,
IB_UVERBS_BASE_MINOR = 192,
[IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
};
-static struct vfsmount *uverbs_event_mnt;
-
static void ib_uverbs_add_one(struct ib_device *device);
static void ib_uverbs_remove_one(struct ib_device *device);
}
struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
- int is_async, int *fd)
+ int is_async)
{
struct ib_uverbs_event_file *ev_file;
- struct path path;
struct file *filp;
- int ret;
ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
if (!ev_file)
ev_file->is_async = is_async;
ev_file->is_closed = 0;
- *fd = get_unused_fd();
- if (*fd < 0) {
- ret = *fd;
- goto err;
- }
-
- /*
- * 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.
- */
- path.mnt = uverbs_event_mnt;
- path.dentry = uverbs_event_mnt->mnt_root;
- path_get(&path);
- filp = alloc_file(&path, FMODE_READ, fops_get(&uverbs_event_fops));
- if (!filp) {
- ret = -ENFILE;
- goto err_fd;
- }
-
- filp->private_data = ev_file;
+ filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops,
+ ev_file, O_RDONLY);
+ if (IS_ERR(filp))
+ kfree(ev_file);
return filp;
-
-err_fd:
- fops_put(&uverbs_event_fops);
- path_put(&path);
- put_unused_fd(*fd);
-
-err:
- kfree(ev_file);
- return ERR_PTR(ret);
}
/*
kfree(uverbs_dev);
}
-static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data,
- struct vfsmount *mnt)
-{
- return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
- INFINIBANDEVENTFS_MAGIC, mnt);
-}
-
-static struct file_system_type uverbs_event_fs = {
- /* No owner field so module can be unloaded */
- .name = "infinibandeventfs",
- .get_sb = uverbs_event_get_sb,
- .kill_sb = kill_litter_super
-};
-
static int __init ib_uverbs_init(void)
{
int ret;
goto out_class;
}
- ret = register_filesystem(&uverbs_event_fs);
- if (ret) {
- printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n");
- goto out_class;
- }
-
- uverbs_event_mnt = kern_mount(&uverbs_event_fs);
- if (IS_ERR(uverbs_event_mnt)) {
- ret = PTR_ERR(uverbs_event_mnt);
- printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n");
- goto out_fs;
- }
-
ret = ib_register_client(&uverbs_client);
if (ret) {
printk(KERN_ERR "user_verbs: couldn't register client\n");
- goto out_mnt;
+ goto out_class;
}
return 0;
-out_mnt:
- mntput(uverbs_event_mnt);
-
-out_fs:
- unregister_filesystem(&uverbs_event_fs);
-
out_class:
class_destroy(uverbs_class);
static void __exit ib_uverbs_cleanup(void)
{
ib_unregister_client(&uverbs_client);
- mntput(uverbs_event_mnt);
- unregister_filesystem(&uverbs_event_fs);
class_destroy(uverbs_class);
unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
idr_destroy(&ib_uverbs_pd_idr);