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o fs_add and fs_remove actually create/remove the device now

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This commit is contained in:
Joe Thornber 2001-08-22 15:33:08 +00:00
parent 4a6a800fd8
commit 016cf45775
3 changed files with 22 additions and 15 deletions
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17
driver/device-mapper/dm-fs.c
View File

@ -129,6 +129,19 @@ int dm_fs_add(struct mapped_device *md)
md->pde->write_proc = _line_splitter;
md->pde->data = pfd;
md->devfs_entry =
devfs_register(_dev_dir, md->name, DEVFS_FL_DEFAULT,
MAJOR(md->dev), MINOR(md->dev),
S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP,
&dm_blk_dops, NULL);
if (!md->devfs_entry) {
kfree(pfd);
remove_proc_entry(md->name, _proc_dir);
md->pde = 0;
return -ENOMEM; /* FIXME: better error ? */
}
return 0;
}
@ -137,7 +150,11 @@ int dm_fs_remove(struct mapped_device *md)
if (md->pde) {
kfree(md->pde->data);
remove_proc_entry(md->name, _proc_dir);
md->pde = 0;
}
devfs_unregister(md->devfs_entry);
md->devfs_entry = 0;
return 0;
}

19
driver/device-mapper/dm.c
View File

@ -137,7 +137,7 @@ static int _blk_close(struct inode *inode, struct file *file);
static int _blk_ioctl(struct inode *inode, struct file *file,
uint command, ulong a);
static struct block_device_operations _blk_dops = {
struct block_device_operations dm_blk_dops = {
open: _blk_open,
release: _blk_close,
ioctl: _blk_ioctl
@ -166,7 +166,7 @@ static int _init(void)
blksize_size[MAJOR_NR] = _blksize_size;
hardsect_size[MAJOR_NR] = _hardsect_size;
if (devfs_register_blkdev(MAJOR_NR, _name, &_blk_dops) < 0) {
if (devfs_register_blkdev(MAJOR_NR, _name, &dm_blk_dops) < 0) {
printk(KERN_ERR "%s -- register_blkdev failed\n", _name);
return -EIO;
}
@ -383,17 +383,6 @@ static struct mapped_device *_alloc_dev(int minor)
return md;
}
static void _free_dev(struct mapped_device *md)
{
int minor = MINOR(md->dev);
wl;
_devs[minor] = 0;
wu;
kfree(md);
}
static inline struct mapped_device *__find_name(const char *name)
{
int i;
@ -462,8 +451,8 @@ int dm_create(const char *name, int minor)
wl;
if (__find_name(name)) {
WARN("device with that name already exists");
kfree(md);
wu;
_free_dev(md);
return -EINVAL;
}
@ -503,7 +492,7 @@ int dm_remove(const char *name)
}
minor = MINOR(md->dev);
_free_dev(md);
kfree(md);
_devs[minor] = 0;
wu;

1
driver/device-mapper/dm.h
View File

@ -95,6 +95,7 @@ struct target {
struct target *next;
};
extern struct block_device_operations dm_blk_dops;
/* dm-target.c */
struct target *dm_get_target(const char *name);