[net-next-2.6.git] / drivers / block / aoe / aoeblk.c

/* Copyright (c) 2007 Coraid, Inc.  See COPYING for GPL terms. */
/*
 * aoeblk.c
 * block device routines
 */

#include <linux/hdreg.h>
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/slab.h>
#include <linux/genhd.h>
#include <linux/netdevice.h>
#include <linux/mutex.h>
#include "aoe.h"

static DEFINE_MUTEX(aoeblk_mutex);
static struct kmem_cache *buf_pool_cache;

static ssize_t aoedisk_show_state(struct device *dev,
				  struct device_attribute *attr, char *page)
{
	struct gendisk *disk = dev_to_disk(dev);
	struct aoedev *d = disk->private_data;

	return snprintf(page, PAGE_SIZE,
			"%s%s\n",
			(d->flags & DEVFL_UP) ? "up" : "down",
			(d->flags & DEVFL_KICKME) ? ",kickme" :
			(d->nopen && !(d->flags & DEVFL_UP)) ? ",closewait" : "");
	/* I'd rather see nopen exported so we can ditch closewait */
}
static ssize_t aoedisk_show_mac(struct device *dev,
				struct device_attribute *attr, char *page)
{
	struct gendisk *disk = dev_to_disk(dev);
	struct aoedev *d = disk->private_data;
	struct aoetgt *t = d->targets[0];

	if (t == NULL)
		return snprintf(page, PAGE_SIZE, "none\n");
	return snprintf(page, PAGE_SIZE, "%pm\n", t->addr);
}
static ssize_t aoedisk_show_netif(struct device *dev,
				  struct device_attribute *attr, char *page)
{
	struct gendisk *disk = dev_to_disk(dev);
	struct aoedev *d = disk->private_data;
	struct net_device *nds[8], **nd, **nnd, **ne;
	struct aoetgt **t, **te;
	struct aoeif *ifp, *e;
	char *p;

	memset(nds, 0, sizeof nds);
	nd = nds;
	ne = nd + ARRAY_SIZE(nds);
	t = d->targets;
	te = t + NTARGETS;
	for (; t < te && *t; t++) {
		ifp = (*t)->ifs;
		e = ifp + NAOEIFS;
		for (; ifp < e && ifp->nd; ifp++) {
			for (nnd = nds; nnd < nd; nnd++)
				if (*nnd == ifp->nd)
					break;
			if (nnd == nd && nd != ne)
				*nd++ = ifp->nd;
		}
	}

	ne = nd;
	nd = nds;
	if (*nd == NULL)
		return snprintf(page, PAGE_SIZE, "none\n");
	for (p = page; nd < ne; nd++)
		p += snprintf(p, PAGE_SIZE - (p-page), "%s%s",
			p == page ? "" : ",", (*nd)->name);
	p += snprintf(p, PAGE_SIZE - (p-page), "\n");
	return p-page;
}
/* firmware version */
static ssize_t aoedisk_show_fwver(struct device *dev,
				  struct device_attribute *attr, char *page)
{
	struct gendisk *disk = dev_to_disk(dev);
	struct aoedev *d = disk->private_data;

	return snprintf(page, PAGE_SIZE, "0x%04x\n", (unsigned int) d->fw_ver);
}

static DEVICE_ATTR(state, S_IRUGO, aoedisk_show_state, NULL);
static DEVICE_ATTR(mac, S_IRUGO, aoedisk_show_mac, NULL);
static DEVICE_ATTR(netif, S_IRUGO, aoedisk_show_netif, NULL);
static struct device_attribute dev_attr_firmware_version = {
	.attr = { .name = "firmware-version", .mode = S_IRUGO },
	.show = aoedisk_show_fwver,
};

static struct attribute *aoe_attrs[] = {
	&dev_attr_state.attr,
	&dev_attr_mac.attr,
	&dev_attr_netif.attr,
	&dev_attr_firmware_version.attr,
	NULL,
};

static const struct attribute_group attr_group = {
	.attrs = aoe_attrs,
};

static int
aoedisk_add_sysfs(struct aoedev *d)
{
	return sysfs_create_group(&disk_to_dev(d->gd)->kobj, &attr_group);
}
void
aoedisk_rm_sysfs(struct aoedev *d)
{
	sysfs_remove_group(&disk_to_dev(d->gd)->kobj, &attr_group);
}

static int
aoeblk_open(struct block_device *bdev, fmode_t mode)
{
	struct aoedev *d = bdev->bd_disk->private_data;
	ulong flags;

	mutex_lock(&aoeblk_mutex);
	spin_lock_irqsave(&d->lock, flags);
	if (d->flags & DEVFL_UP) {
		d->nopen++;
		spin_unlock_irqrestore(&d->lock, flags);
		mutex_unlock(&aoeblk_mutex);
		return 0;
	}
	spin_unlock_irqrestore(&d->lock, flags);
	mutex_unlock(&aoeblk_mutex);
	return -ENODEV;
}

static int
aoeblk_release(struct gendisk *disk, fmode_t mode)
{
	struct aoedev *d = disk->private_data;
	ulong flags;

	spin_lock_irqsave(&d->lock, flags);

	if (--d->nopen == 0) {
		spin_unlock_irqrestore(&d->lock, flags);
		aoecmd_cfg(d->aoemajor, d->aoeminor);
		return 0;
	}
	spin_unlock_irqrestore(&d->lock, flags);

	return 0;
}

static int
aoeblk_make_request(struct request_queue *q, struct bio *bio)
{
	struct sk_buff_head queue;
	struct aoedev *d;
	struct buf *buf;
	ulong flags;

	blk_queue_bounce(q, &bio);

	if (bio == NULL) {
		printk(KERN_ERR "aoe: bio is NULL\n");
		BUG();
		return 0;
	}
	d = bio->bi_bdev->bd_disk->private_data;
	if (d == NULL) {
		printk(KERN_ERR "aoe: bd_disk->private_data is NULL\n");
		BUG();
		bio_endio(bio, -ENXIO);
		return 0;
	} else if (bio->bi_rw & REQ_HARDBARRIER) {
		bio_endio(bio, -EOPNOTSUPP);
		return 0;
	} else if (bio->bi_io_vec == NULL) {
		printk(KERN_ERR "aoe: bi_io_vec is NULL\n");
		BUG();
		bio_endio(bio, -ENXIO);
		return 0;
	}
	buf = mempool_alloc(d->bufpool, GFP_NOIO);
	if (buf == NULL) {
		printk(KERN_INFO "aoe: buf allocation failure\n");
		bio_endio(bio, -ENOMEM);
		return 0;
	}
	memset(buf, 0, sizeof(*buf));
	INIT_LIST_HEAD(&buf->bufs);
	buf->stime = jiffies;
	buf->bio = bio;
	buf->resid = bio->bi_size;
	buf->sector = bio->bi_sector;
	buf->bv = &bio->bi_io_vec[bio->bi_idx];
	buf->bv_resid = buf->bv->bv_len;
	WARN_ON(buf->bv_resid == 0);
	buf->bv_off = buf->bv->bv_offset;

	spin_lock_irqsave(&d->lock, flags);

	if ((d->flags & DEVFL_UP) == 0) {
		printk(KERN_INFO "aoe: device %ld.%d is not up\n",
			d->aoemajor, d->aoeminor);
		spin_unlock_irqrestore(&d->lock, flags);
		mempool_free(buf, d->bufpool);
		bio_endio(bio, -ENXIO);
		return 0;
	}

	list_add_tail(&buf->bufs, &d->bufq);

	aoecmd_work(d);
	__skb_queue_head_init(&queue);
	skb_queue_splice_init(&d->sendq, &queue);

	spin_unlock_irqrestore(&d->lock, flags);
	aoenet_xmit(&queue);

	return 0;
}

static int
aoeblk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
	struct aoedev *d = bdev->bd_disk->private_data;

	if ((d->flags & DEVFL_UP) == 0) {
		printk(KERN_ERR "aoe: disk not up\n");
		return -ENODEV;
	}

	geo->cylinders = d->geo.cylinders;
	geo->heads = d->geo.heads;
	geo->sectors = d->geo.sectors;
	return 0;
}

static const struct block_device_operations aoe_bdops = {
	.open = aoeblk_open,
	.release = aoeblk_release,
	.getgeo = aoeblk_getgeo,
	.owner = THIS_MODULE,
};

/* alloc_disk and add_disk can sleep */
void
aoeblk_gdalloc(void *vp)
{
	struct aoedev *d = vp;
	struct gendisk *gd;
	ulong flags;

	gd = alloc_disk(AOE_PARTITIONS);
	if (gd == NULL) {
		printk(KERN_ERR
			"aoe: cannot allocate disk structure for %ld.%d\n",
			d->aoemajor, d->aoeminor);
		goto err;
	}

	d->bufpool = mempool_create_slab_pool(MIN_BUFS, buf_pool_cache);
	if (d->bufpool == NULL) {
		printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%d\n",
			d->aoemajor, d->aoeminor);
		goto err_disk;
	}

	d->blkq = blk_alloc_queue(GFP_KERNEL);
	if (!d->blkq)
		goto err_mempool;
	blk_queue_make_request(d->blkq, aoeblk_make_request);
	d->blkq->backing_dev_info.name = "aoe";
	if (bdi_init(&d->blkq->backing_dev_info))
		goto err_blkq;
	spin_lock_irqsave(&d->lock, flags);
	gd->major = AOE_MAJOR;
	gd->first_minor = d->sysminor * AOE_PARTITIONS;
	gd->fops = &aoe_bdops;
	gd->private_data = d;
	set_capacity(gd, d->ssize);
	snprintf(gd->disk_name, sizeof gd->disk_name, "etherd/e%ld.%d",
		d->aoemajor, d->aoeminor);

	gd->queue = d->blkq;
	d->gd = gd;
	d->flags &= ~DEVFL_GDALLOC;
	d->flags |= DEVFL_UP;

	spin_unlock_irqrestore(&d->lock, flags);

	add_disk(gd);
	aoedisk_add_sysfs(d);
	return;

err_blkq:
	blk_cleanup_queue(d->blkq);
	d->blkq = NULL;
err_mempool:
	mempool_destroy(d->bufpool);
err_disk:
	put_disk(gd);
err:
	spin_lock_irqsave(&d->lock, flags);
	d->flags &= ~DEVFL_GDALLOC;
	spin_unlock_irqrestore(&d->lock, flags);
}

void
aoeblk_exit(void)
{
	kmem_cache_destroy(buf_pool_cache);
}

int __init
aoeblk_init(void)
{
	buf_pool_cache = kmem_cache_create("aoe_bufs",
					   sizeof(struct buf),
					   0, 0, NULL);
	if (buf_pool_cache == NULL)
		return -ENOMEM;

	return 0;
}
Commit	Line	Data
52e112b3	1	/* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */
1da177e4 LT	2	/*
	3	* aoeblk.c
	4	* block device routines
	5	*/
	6
	7	#include <linux/hdreg.h>
	8	#include <linux/blkdev.h>
43cbe2cb	9	#include <linux/backing-dev.h>
1da177e4 LT	10	#include <linux/fs.h>
1da177e4 LT	11	#include <linux/ioctl.h>
5a0e3ad6	12	#include <linux/slab.h>
1da177e4 LT	13	#include <linux/genhd.h>
1da177e4 LT	14	#include <linux/netdevice.h>
2a48fc0a	15	#include <linux/mutex.h>
1da177e4 LT	16	#include "aoe.h"
1da177e4 LT	17
2a48fc0a	18	static DEFINE_MUTEX(aoeblk_mutex);
e18b890b	19	static struct kmem_cache *buf_pool_cache;
1da177e4	20
edfaa7c3 KS	21	static ssize_t aoedisk_show_state(struct device *dev,
edfaa7c3 KS	22	struct device_attribute attr, char page)
1da177e4	23	{
edfaa7c3	24	struct gendisk *disk = dev_to_disk(dev);
1da177e4 LT	25	struct aoedev *d = disk->private_data;
	26
	27	return snprintf(page, PAGE_SIZE,
	28	"%s%s\n",
	29	(d->flags & DEVFL_UP) ? "up" : "down",
68e0d42f	30	(d->flags & DEVFL_KICKME) ? ",kickme" :
3ae1c24e EC	31	(d->nopen && !(d->flags & DEVFL_UP)) ? ",closewait" : "");
3ae1c24e EC	32	/* I'd rather see nopen exported so we can ditch closewait */
1da177e4	33	}
edfaa7c3 KS	34	static ssize_t aoedisk_show_mac(struct device *dev,
edfaa7c3 KS	35	struct device_attribute attr, char page)
1da177e4	36	{
edfaa7c3	37	struct gendisk *disk = dev_to_disk(dev);
1da177e4	38	struct aoedev *d = disk->private_data;
68e0d42f	39	struct aoetgt *t = d->targets[0];
1da177e4	40
68e0d42f EC	41	if (t == NULL)
68e0d42f EC	42	return snprintf(page, PAGE_SIZE, "none\n");
411c41ee	43	return snprintf(page, PAGE_SIZE, "%pm\n", t->addr);
1da177e4	44	}
edfaa7c3 KS	45	static ssize_t aoedisk_show_netif(struct device *dev,
edfaa7c3 KS	46	struct device_attribute attr, char page)
1da177e4	47	{
edfaa7c3	48	struct gendisk *disk = dev_to_disk(dev);
1da177e4	49	struct aoedev *d = disk->private_data;
68e0d42f EC	50	struct net_device nds[8], nd, nnd, *ne;
	51	struct aoetgt t, te;
	52	struct aoeif ifp, e;
	53	char *p;
	54
	55	memset(nds, 0, sizeof nds);
	56	nd = nds;
	57	ne = nd + ARRAY_SIZE(nds);
	58	t = d->targets;
	59	te = t + NTARGETS;
	60	for (; t < te && *t; t++) {
	61	ifp = (*t)->ifs;
	62	e = ifp + NAOEIFS;
	63	for (; ifp < e && ifp->nd; ifp++) {
	64	for (nnd = nds; nnd < nd; nnd++)
	65	if (*nnd == ifp->nd)
	66	break;
	67	if (nnd == nd && nd != ne)
	68	*nd++ = ifp->nd;
	69	}
	70	}
1da177e4	71
68e0d42f EC	72	ne = nd;
	73	nd = nds;
	74	if (*nd == NULL)
	75	return snprintf(page, PAGE_SIZE, "none\n");
	76	for (p = page; nd < ne; nd++)
	77	p += snprintf(p, PAGE_SIZE - (p-page), "%s%s",
	78	p == page ? "" : ",", (*nd)->name);
	79	p += snprintf(p, PAGE_SIZE - (p-page), "\n");
	80	return p-page;
1da177e4	81	}
4613ed27	82	/* firmware version */
edfaa7c3 KS	83	static ssize_t aoedisk_show_fwver(struct device *dev,
edfaa7c3 KS	84	struct device_attribute attr, char page)
4613ed27	85	{
edfaa7c3	86	struct gendisk *disk = dev_to_disk(dev);
4613ed27 EC	87	struct aoedev *d = disk->private_data;
	88
	89	return snprintf(page, PAGE_SIZE, "0x%04x\n", (unsigned int) d->fw_ver);
	90	}
1da177e4	91
edfaa7c3 KS	92	static DEVICE_ATTR(state, S_IRUGO, aoedisk_show_state, NULL);
	93	static DEVICE_ATTR(mac, S_IRUGO, aoedisk_show_mac, NULL);
	94	static DEVICE_ATTR(netif, S_IRUGO, aoedisk_show_netif, NULL);
	95	static struct device_attribute dev_attr_firmware_version = {
01e8ef11	96	.attr = { .name = "firmware-version", .mode = S_IRUGO },
edfaa7c3	97	.show = aoedisk_show_fwver,
4613ed27	98	};
1da177e4	99
4ca5224f	100	static struct attribute *aoe_attrs[] = {
edfaa7c3 KS	101	&dev_attr_state.attr,
	102	&dev_attr_mac.attr,
	103	&dev_attr_netif.attr,
	104	&dev_attr_firmware_version.attr,
	105	NULL,
4ca5224f GKH	106	};
	107
	108	static const struct attribute_group attr_group = {
	109	.attrs = aoe_attrs,
	110	};
	111
	112	static int
1da177e4 LT	113	aoedisk_add_sysfs(struct aoedev *d)
1da177e4 LT	114	{
ed9e1982	115	return sysfs_create_group(&disk_to_dev(d->gd)->kobj, &attr_group);
1da177e4 LT	116	}
	117	void
	118	aoedisk_rm_sysfs(struct aoedev *d)
	119	{
ed9e1982	120	sysfs_remove_group(&disk_to_dev(d->gd)->kobj, &attr_group);
1da177e4 LT	121	}
	122
	123	static int
94562c17	124	aoeblk_open(struct block_device *bdev, fmode_t mode)
1da177e4	125	{
94562c17	126	struct aoedev *d = bdev->bd_disk->private_data;
1da177e4 LT	127	ulong flags;
1da177e4 LT	128
2a48fc0a	129	mutex_lock(&aoeblk_mutex);
1da177e4 LT	130	spin_lock_irqsave(&d->lock, flags);
	131	if (d->flags & DEVFL_UP) {
	132	d->nopen++;
	133	spin_unlock_irqrestore(&d->lock, flags);
2a48fc0a	134	mutex_unlock(&aoeblk_mutex);
1da177e4 LT	135	return 0;
	136	}
	137	spin_unlock_irqrestore(&d->lock, flags);
2a48fc0a	138	mutex_unlock(&aoeblk_mutex);
1da177e4 LT	139	return -ENODEV;
	140	}
	141
	142	static int
94562c17	143	aoeblk_release(struct gendisk *disk, fmode_t mode)
1da177e4	144	{
94562c17	145	struct aoedev *d = disk->private_data;
1da177e4 LT	146	ulong flags;
1da177e4 LT	147
1da177e4 LT	148	spin_lock_irqsave(&d->lock, flags);
1da177e4 LT	149
5f7702fd	150	if (--d->nopen == 0) {
1da177e4 LT	151	spin_unlock_irqrestore(&d->lock, flags);
	152	aoecmd_cfg(d->aoemajor, d->aoeminor);
	153	return 0;
	154	}
	155	spin_unlock_irqrestore(&d->lock, flags);
	156
	157	return 0;
	158	}
	159
	160	static int
165125e1	161	aoeblk_make_request(struct request_queue q, struct bio bio)
1da177e4	162	{
e9bb8fb0	163	struct sk_buff_head queue;
1da177e4 LT	164	struct aoedev *d;
1da177e4 LT	165	struct buf *buf;
1da177e4 LT	166	ulong flags;
	167
	168	blk_queue_bounce(q, &bio);
	169
68e0d42f EC	170	if (bio == NULL) {
	171	printk(KERN_ERR "aoe: bio is NULL\n");
	172	BUG();
	173	return 0;
	174	}
1da177e4	175	d = bio->bi_bdev->bd_disk->private_data;
68e0d42f EC	176	if (d == NULL) {
	177	printk(KERN_ERR "aoe: bd_disk->private_data is NULL\n");
	178	BUG();
	179	bio_endio(bio, -ENXIO);
	180	return 0;
7b6d91da	181	} else if (bio->bi_rw & REQ_HARDBARRIER) {
18d8217b EC	182	bio_endio(bio, -EOPNOTSUPP);
18d8217b EC	183	return 0;
68e0d42f EC	184	} else if (bio->bi_io_vec == NULL) {
	185	printk(KERN_ERR "aoe: bi_io_vec is NULL\n");
	186	BUG();
	187	bio_endio(bio, -ENXIO);
	188	return 0;
	189	}
1da177e4 LT	190	buf = mempool_alloc(d->bufpool, GFP_NOIO);
1da177e4 LT	191	if (buf == NULL) {
a12c93f0	192	printk(KERN_INFO "aoe: buf allocation failure\n");
6712ecf8	193	bio_endio(bio, -ENOMEM);
1da177e4 LT	194	return 0;
	195	}
	196	memset(buf, 0, sizeof(*buf));
	197	INIT_LIST_HEAD(&buf->bufs);
68e0d42f	198	buf->stime = jiffies;
1da177e4 LT	199	buf->bio = bio;
	200	buf->resid = bio->bi_size;
	201	buf->sector = bio->bi_sector;
392e4845	202	buf->bv = &bio->bi_io_vec[bio->bi_idx];
1da177e4	203	buf->bv_resid = buf->bv->bv_len;
68e0d42f EC	204	WARN_ON(buf->bv_resid == 0);
68e0d42f EC	205	buf->bv_off = buf->bv->bv_offset;
1da177e4 LT	206
	207	spin_lock_irqsave(&d->lock, flags);
	208
	209	if ((d->flags & DEVFL_UP) == 0) {
1d75981a	210	printk(KERN_INFO "aoe: device %ld.%d is not up\n",
a12c93f0	211	d->aoemajor, d->aoeminor);
1da177e4 LT	212	spin_unlock_irqrestore(&d->lock, flags);
1da177e4 LT	213	mempool_free(buf, d->bufpool);
6712ecf8	214	bio_endio(bio, -ENXIO);
1da177e4 LT	215	return 0;
	216	}
	217
	218	list_add_tail(&buf->bufs, &d->bufq);
1da177e4	219
3ae1c24e	220	aoecmd_work(d);
e9bb8fb0 DM	221	__skb_queue_head_init(&queue);
e9bb8fb0 DM	222	skb_queue_splice_init(&d->sendq, &queue);
1da177e4 LT	223
1da177e4 LT	224	spin_unlock_irqrestore(&d->lock, flags);
e9bb8fb0	225	aoenet_xmit(&queue);
3ae1c24e	226
1da177e4 LT	227	return 0;
	228	}
	229
1da177e4	230	static int
a885c8c4	231	aoeblk_getgeo(struct block_device bdev, struct hd_geometry geo)
1da177e4	232	{
a885c8c4	233	struct aoedev *d = bdev->bd_disk->private_data;
1da177e4	234
1da177e4	235	if ((d->flags & DEVFL_UP) == 0) {
a12c93f0	236	printk(KERN_ERR "aoe: disk not up\n");
1da177e4 LT	237	return -ENODEV;
	238	}
	239
a885c8c4 CH	240	geo->cylinders = d->geo.cylinders;
	241	geo->heads = d->geo.heads;
	242	geo->sectors = d->geo.sectors;
	243	return 0;
1da177e4 LT	244	}
1da177e4 LT	245
83d5cde4	246	static const struct block_device_operations aoe_bdops = {
94562c17 AV	247	.open = aoeblk_open,
94562c17 AV	248	.release = aoeblk_release,
a885c8c4	249	.getgeo = aoeblk_getgeo,
1da177e4 LT	250	.owner = THIS_MODULE,
	251	};
	252
	253	/* alloc_disk and add_disk can sleep */
	254	void
	255	aoeblk_gdalloc(void *vp)
	256	{
	257	struct aoedev *d = vp;
	258	struct gendisk *gd;
	259	ulong flags;
	260
	261	gd = alloc_disk(AOE_PARTITIONS);
	262	if (gd == NULL) {
1d75981a EC	263	printk(KERN_ERR
1d75981a EC	264	"aoe: cannot allocate disk structure for %ld.%d\n",
6bb6285f	265	d->aoemajor, d->aoeminor);
43cbe2cb	266	goto err;
1da177e4 LT	267	}
1da177e4 LT	268
93d2341c	269	d->bufpool = mempool_create_slab_pool(MIN_BUFS, buf_pool_cache);
1da177e4	270	if (d->bufpool == NULL) {
1d75981a	271	printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%d\n",
6bb6285f	272	d->aoemajor, d->aoeminor);
43cbe2cb	273	goto err_disk;
1da177e4 LT	274	}
1da177e4 LT	275
7135a71b EC	276	d->blkq = blk_alloc_queue(GFP_KERNEL);
7135a71b EC	277	if (!d->blkq)
43cbe2cb	278	goto err_mempool;
7135a71b	279	blk_queue_make_request(d->blkq, aoeblk_make_request);
d993831f	280	d->blkq->backing_dev_info.name = "aoe";
7135a71b EC	281	if (bdi_init(&d->blkq->backing_dev_info))
7135a71b EC	282	goto err_blkq;
43cbe2cb	283	spin_lock_irqsave(&d->lock, flags);
1da177e4 LT	284	gd->major = AOE_MAJOR;
	285	gd->first_minor = d->sysminor * AOE_PARTITIONS;
	286	gd->fops = &aoe_bdops;
	287	gd->private_data = d;
80795aef	288	set_capacity(gd, d->ssize);
68e0d42f	289	snprintf(gd->disk_name, sizeof gd->disk_name, "etherd/e%ld.%d",
1da177e4 LT	290	d->aoemajor, d->aoeminor);
1da177e4 LT	291
7135a71b	292	gd->queue = d->blkq;
1da177e4	293	d->gd = gd;
3ae1c24e	294	d->flags &= ~DEVFL_GDALLOC;
1da177e4 LT	295	d->flags \|= DEVFL_UP;
	296
	297	spin_unlock_irqrestore(&d->lock, flags);
	298
	299	add_disk(gd);
	300	aoedisk_add_sysfs(d);
43cbe2cb AM	301	return;
43cbe2cb AM	302
7135a71b EC	303	err_blkq:
	304	blk_cleanup_queue(d->blkq);
	305	d->blkq = NULL;
43cbe2cb AM	306	err_mempool:
	307	mempool_destroy(d->bufpool);
	308	err_disk:
	309	put_disk(gd);
	310	err:
	311	spin_lock_irqsave(&d->lock, flags);
	312	d->flags &= ~DEVFL_GDALLOC;
	313	spin_unlock_irqrestore(&d->lock, flags);
1da177e4 LT	314	}
	315
	316	void
	317	aoeblk_exit(void)
	318	{
	319	kmem_cache_destroy(buf_pool_cache);
	320	}
	321
	322	int __init
	323	aoeblk_init(void)
	324	{
20c2df83	325	buf_pool_cache = kmem_cache_create("aoe_bufs",
1da177e4	326	sizeof(struct buf),
20c2df83	327	0, 0, NULL);
1da177e4 LT	328	if (buf_pool_cache == NULL)
	329	return -ENOMEM;
	330
	331	return 0;
	332	}
	333