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switch infiniband uverbs to anon_inodes

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2010-01-18 01:38:00 -05:00
parent 2f99cc6e46
commit b1e4594ba0
4 changed files with 29 additions and 81 deletions
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82
drivers/infiniband/core/uverbs_main.c
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@@ -41,8 +41,8 @@
#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>
@@ -53,8 +53,6 @@ MODULE_AUTHOR("Roland Dreier");
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,
@@ -111,8 +109,6 @@ static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
[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);
@@ -489,12 +485,10 @@ void ib_uverbs_event_handler(struct ib_event_handler *handler,
}
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)
@@ -509,38 +503,12 @@ struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_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);
}
/*
@@ -825,21 +793,6 @@ static void ib_uverbs_remove_one(struct ib_device *device)
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;
@@ -864,33 +817,14 @@ static int __init ib_uverbs_init(void)
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);
@@ -904,8 +838,6 @@ out:
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);