[mirror_ubuntu-artful-kernel.git] / drivers / block / aoe / aoeblk.c

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

#include <linux/kernel.h>
#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/ratelimit.h>
#include <linux/genhd.h>
#include <linux/netdevice.h>
#include <linux/mutex.h>
#include <linux/export.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 void
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;
	}
	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;
	} else if (bio->bi_io_vec == NULL) {
		printk(KERN_ERR "aoe: bi_io_vec is NULL\n");
		BUG();
		bio_endio(bio, -ENXIO);
		return;
	}
	buf = mempool_alloc(d->bufpool, GFP_NOIO);
	if (buf == NULL) {
		printk(KERN_INFO "aoe: buf allocation failure\n");
		bio_endio(bio, -ENOMEM);
		return;
	}
	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) {
		pr_info_ratelimited("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;
	}

	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);
}

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
027b180d	7	#include <linux/kernel.h>
1da177e4 LT	8	#include <linux/hdreg.h>
1da177e4 LT	9	#include <linux/blkdev.h>
43cbe2cb	10	#include <linux/backing-dev.h>
1da177e4 LT	11	#include <linux/fs.h>
1da177e4 LT	12	#include <linux/ioctl.h>
5a0e3ad6	13	#include <linux/slab.h>
027b180d	14	#include <linux/ratelimit.h>
1da177e4 LT	15	#include <linux/genhd.h>
1da177e4 LT	16	#include <linux/netdevice.h>
2a48fc0a	17	#include <linux/mutex.h>
d5decd3b	18	#include <linux/export.h>
1da177e4 LT	19	#include "aoe.h"
1da177e4 LT	20
2a48fc0a	21	static DEFINE_MUTEX(aoeblk_mutex);
e18b890b	22	static struct kmem_cache *buf_pool_cache;
1da177e4	23
edfaa7c3 KS	24	static ssize_t aoedisk_show_state(struct device *dev,
edfaa7c3 KS	25	struct device_attribute attr, char page)
1da177e4	26	{
edfaa7c3	27	struct gendisk *disk = dev_to_disk(dev);
1da177e4 LT	28	struct aoedev *d = disk->private_data;
	29
	30	return snprintf(page, PAGE_SIZE,
	31	"%s%s\n",
	32	(d->flags & DEVFL_UP) ? "up" : "down",
68e0d42f	33	(d->flags & DEVFL_KICKME) ? ",kickme" :
3ae1c24e EC	34	(d->nopen && !(d->flags & DEVFL_UP)) ? ",closewait" : "");
3ae1c24e EC	35	/* I'd rather see nopen exported so we can ditch closewait */
1da177e4	36	}
edfaa7c3 KS	37	static ssize_t aoedisk_show_mac(struct device *dev,
edfaa7c3 KS	38	struct device_attribute attr, char page)
1da177e4	39	{
edfaa7c3	40	struct gendisk *disk = dev_to_disk(dev);
1da177e4	41	struct aoedev *d = disk->private_data;
68e0d42f	42	struct aoetgt *t = d->targets[0];
1da177e4	43
68e0d42f EC	44	if (t == NULL)
68e0d42f EC	45	return snprintf(page, PAGE_SIZE, "none\n");
411c41ee	46	return snprintf(page, PAGE_SIZE, "%pm\n", t->addr);
1da177e4	47	}
edfaa7c3 KS	48	static ssize_t aoedisk_show_netif(struct device *dev,
edfaa7c3 KS	49	struct device_attribute attr, char page)
1da177e4	50	{
edfaa7c3	51	struct gendisk *disk = dev_to_disk(dev);
1da177e4	52	struct aoedev *d = disk->private_data;
68e0d42f EC	53	struct net_device nds[8], nd, nnd, *ne;
	54	struct aoetgt t, te;
	55	struct aoeif ifp, e;
	56	char *p;
	57
	58	memset(nds, 0, sizeof nds);
	59	nd = nds;
	60	ne = nd + ARRAY_SIZE(nds);
	61	t = d->targets;
	62	te = t + NTARGETS;
	63	for (; t < te && *t; t++) {
	64	ifp = (*t)->ifs;
	65	e = ifp + NAOEIFS;
	66	for (; ifp < e && ifp->nd; ifp++) {
	67	for (nnd = nds; nnd < nd; nnd++)
	68	if (*nnd == ifp->nd)
	69	break;
	70	if (nnd == nd && nd != ne)
	71	*nd++ = ifp->nd;
	72	}
	73	}
1da177e4	74
68e0d42f EC	75	ne = nd;
	76	nd = nds;
	77	if (*nd == NULL)
	78	return snprintf(page, PAGE_SIZE, "none\n");
	79	for (p = page; nd < ne; nd++)
	80	p += snprintf(p, PAGE_SIZE - (p-page), "%s%s",
	81	p == page ? "" : ",", (*nd)->name);
	82	p += snprintf(p, PAGE_SIZE - (p-page), "\n");
	83	return p-page;
1da177e4	84	}
4613ed27	85	/* firmware version */
edfaa7c3 KS	86	static ssize_t aoedisk_show_fwver(struct device *dev,
edfaa7c3 KS	87	struct device_attribute attr, char page)
4613ed27	88	{
edfaa7c3	89	struct gendisk *disk = dev_to_disk(dev);
4613ed27 EC	90	struct aoedev *d = disk->private_data;
	91
	92	return snprintf(page, PAGE_SIZE, "0x%04x\n", (unsigned int) d->fw_ver);
	93	}
1da177e4	94
edfaa7c3 KS	95	static DEVICE_ATTR(state, S_IRUGO, aoedisk_show_state, NULL);
	96	static DEVICE_ATTR(mac, S_IRUGO, aoedisk_show_mac, NULL);
	97	static DEVICE_ATTR(netif, S_IRUGO, aoedisk_show_netif, NULL);
	98	static struct device_attribute dev_attr_firmware_version = {
01e8ef11	99	.attr = { .name = "firmware-version", .mode = S_IRUGO },
edfaa7c3	100	.show = aoedisk_show_fwver,
4613ed27	101	};
1da177e4	102
4ca5224f	103	static struct attribute *aoe_attrs[] = {
edfaa7c3 KS	104	&dev_attr_state.attr,
	105	&dev_attr_mac.attr,
	106	&dev_attr_netif.attr,
	107	&dev_attr_firmware_version.attr,
	108	NULL,
4ca5224f GKH	109	};
	110
	111	static const struct attribute_group attr_group = {
	112	.attrs = aoe_attrs,
	113	};
	114
	115	static int
1da177e4 LT	116	aoedisk_add_sysfs(struct aoedev *d)
1da177e4 LT	117	{
ed9e1982	118	return sysfs_create_group(&disk_to_dev(d->gd)->kobj, &attr_group);
1da177e4 LT	119	}
	120	void
	121	aoedisk_rm_sysfs(struct aoedev *d)
	122	{
ed9e1982	123	sysfs_remove_group(&disk_to_dev(d->gd)->kobj, &attr_group);
1da177e4 LT	124	}
	125
	126	static int
94562c17	127	aoeblk_open(struct block_device *bdev, fmode_t mode)
1da177e4	128	{
94562c17	129	struct aoedev *d = bdev->bd_disk->private_data;
1da177e4 LT	130	ulong flags;
1da177e4 LT	131
2a48fc0a	132	mutex_lock(&aoeblk_mutex);
1da177e4 LT	133	spin_lock_irqsave(&d->lock, flags);
	134	if (d->flags & DEVFL_UP) {
	135	d->nopen++;
	136	spin_unlock_irqrestore(&d->lock, flags);
2a48fc0a	137	mutex_unlock(&aoeblk_mutex);
1da177e4 LT	138	return 0;
	139	}
	140	spin_unlock_irqrestore(&d->lock, flags);
2a48fc0a	141	mutex_unlock(&aoeblk_mutex);
1da177e4 LT	142	return -ENODEV;
	143	}
	144
	145	static int
94562c17	146	aoeblk_release(struct gendisk *disk, fmode_t mode)
1da177e4	147	{
94562c17	148	struct aoedev *d = disk->private_data;
1da177e4 LT	149	ulong flags;
1da177e4 LT	150
1da177e4 LT	151	spin_lock_irqsave(&d->lock, flags);
1da177e4 LT	152
5f7702fd	153	if (--d->nopen == 0) {
1da177e4 LT	154	spin_unlock_irqrestore(&d->lock, flags);
	155	aoecmd_cfg(d->aoemajor, d->aoeminor);
	156	return 0;
	157	}
	158	spin_unlock_irqrestore(&d->lock, flags);
	159
	160	return 0;
	161	}
	162
5a7bbad2	163	static void
165125e1	164	aoeblk_make_request(struct request_queue q, struct bio bio)
1da177e4	165	{
e9bb8fb0	166	struct sk_buff_head queue;
1da177e4 LT	167	struct aoedev *d;
1da177e4 LT	168	struct buf *buf;
1da177e4 LT	169	ulong flags;
	170
	171	blk_queue_bounce(q, &bio);
	172
68e0d42f EC	173	if (bio == NULL) {
	174	printk(KERN_ERR "aoe: bio is NULL\n");
	175	BUG();
5a7bbad2	176	return;
68e0d42f	177	}
1da177e4	178	d = bio->bi_bdev->bd_disk->private_data;
68e0d42f EC	179	if (d == NULL) {
	180	printk(KERN_ERR "aoe: bd_disk->private_data is NULL\n");
	181	BUG();
	182	bio_endio(bio, -ENXIO);
5a7bbad2	183	return;
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);
5a7bbad2	188	return;
68e0d42f	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);
5a7bbad2	194	return;
1da177e4 LT	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) {
027b180d	210	pr_info_ratelimited("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);
5a7bbad2	215	return;
1da177e4 LT	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);
1da177e4 LT	226	}
1da177e4 LT	227
1da177e4	228	static int
a885c8c4	229	aoeblk_getgeo(struct block_device bdev, struct hd_geometry geo)
1da177e4	230	{
a885c8c4	231	struct aoedev *d = bdev->bd_disk->private_data;
1da177e4	232
1da177e4	233	if ((d->flags & DEVFL_UP) == 0) {
a12c93f0	234	printk(KERN_ERR "aoe: disk not up\n");
1da177e4 LT	235	return -ENODEV;
	236	}
	237
a885c8c4 CH	238	geo->cylinders = d->geo.cylinders;
	239	geo->heads = d->geo.heads;
	240	geo->sectors = d->geo.sectors;
	241	return 0;
1da177e4 LT	242	}
1da177e4 LT	243
83d5cde4	244	static const struct block_device_operations aoe_bdops = {
94562c17 AV	245	.open = aoeblk_open,
94562c17 AV	246	.release = aoeblk_release,
a885c8c4	247	.getgeo = aoeblk_getgeo,
1da177e4 LT	248	.owner = THIS_MODULE,
	249	};
	250
	251	/* alloc_disk and add_disk can sleep */
	252	void
	253	aoeblk_gdalloc(void *vp)
	254	{
	255	struct aoedev *d = vp;
	256	struct gendisk *gd;
	257	ulong flags;
	258
	259	gd = alloc_disk(AOE_PARTITIONS);
	260	if (gd == NULL) {
1d75981a EC	261	printk(KERN_ERR
1d75981a EC	262	"aoe: cannot allocate disk structure for %ld.%d\n",
6bb6285f	263	d->aoemajor, d->aoeminor);
43cbe2cb	264	goto err;
1da177e4 LT	265	}
1da177e4 LT	266
93d2341c	267	d->bufpool = mempool_create_slab_pool(MIN_BUFS, buf_pool_cache);
1da177e4	268	if (d->bufpool == NULL) {
1d75981a	269	printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%d\n",
6bb6285f	270	d->aoemajor, d->aoeminor);
43cbe2cb	271	goto err_disk;
1da177e4 LT	272	}
1da177e4 LT	273
7135a71b EC	274	d->blkq = blk_alloc_queue(GFP_KERNEL);
7135a71b EC	275	if (!d->blkq)
43cbe2cb	276	goto err_mempool;
7135a71b	277	blk_queue_make_request(d->blkq, aoeblk_make_request);
d993831f	278	d->blkq->backing_dev_info.name = "aoe";
7135a71b EC	279	if (bdi_init(&d->blkq->backing_dev_info))
7135a71b EC	280	goto err_blkq;
43cbe2cb	281	spin_lock_irqsave(&d->lock, flags);
1da177e4 LT	282	gd->major = AOE_MAJOR;
	283	gd->first_minor = d->sysminor * AOE_PARTITIONS;
	284	gd->fops = &aoe_bdops;
	285	gd->private_data = d;
80795aef	286	set_capacity(gd, d->ssize);
68e0d42f	287	snprintf(gd->disk_name, sizeof gd->disk_name, "etherd/e%ld.%d",
1da177e4 LT	288	d->aoemajor, d->aoeminor);
1da177e4 LT	289
7135a71b	290	gd->queue = d->blkq;
1da177e4	291	d->gd = gd;
3ae1c24e	292	d->flags &= ~DEVFL_GDALLOC;
1da177e4 LT	293	d->flags \|= DEVFL_UP;
	294
	295	spin_unlock_irqrestore(&d->lock, flags);
	296
	297	add_disk(gd);
	298	aoedisk_add_sysfs(d);
43cbe2cb AM	299	return;
43cbe2cb AM	300
7135a71b EC	301	err_blkq:
	302	blk_cleanup_queue(d->blkq);
	303	d->blkq = NULL;
43cbe2cb AM	304	err_mempool:
	305	mempool_destroy(d->bufpool);
	306	err_disk:
	307	put_disk(gd);
	308	err:
	309	spin_lock_irqsave(&d->lock, flags);
	310	d->flags &= ~DEVFL_GDALLOC;
	311	spin_unlock_irqrestore(&d->lock, flags);
1da177e4 LT	312	}
	313
	314	void
	315	aoeblk_exit(void)
	316	{
	317	kmem_cache_destroy(buf_pool_cache);
	318	}
	319
	320	int __init
	321	aoeblk_init(void)
	322	{
20c2df83	323	buf_pool_cache = kmem_cache_create("aoe_bufs",
1da177e4	324	sizeof(struct buf),
20c2df83	325	0, 0, NULL);
1da177e4 LT	326	if (buf_pool_cache == NULL)
	327	return -ENOMEM;
	328
	329	return 0;
	330	}
	331