Ed L. Cashin | 52e112b | 2008-02-08 04:20:09 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * aoeblk.c |
| 4 | * block device routines |
| 5 | */ |
| 6 | |
| 7 | #include <linux/hdreg.h> |
| 8 | #include <linux/blkdev.h> |
Andrew Morton | 43cbe2c | 2007-12-10 15:49:13 -0800 | [diff] [blame] | 9 | #include <linux/backing-dev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/fs.h> |
| 11 | #include <linux/ioctl.h> |
| 12 | #include <linux/genhd.h> |
| 13 | #include <linux/netdevice.h> |
| 14 | #include "aoe.h" |
| 15 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 16 | static struct kmem_cache *buf_pool_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 18 | static ssize_t aoedisk_show_state(struct device *dev, |
| 19 | struct device_attribute *attr, char *page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 21 | struct gendisk *disk = dev_to_disk(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | struct aoedev *d = disk->private_data; |
| 23 | |
| 24 | return snprintf(page, PAGE_SIZE, |
| 25 | "%s%s\n", |
| 26 | (d->flags & DEVFL_UP) ? "up" : "down", |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 27 | (d->flags & DEVFL_KICKME) ? ",kickme" : |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 28 | (d->nopen && !(d->flags & DEVFL_UP)) ? ",closewait" : ""); |
| 29 | /* I'd rather see nopen exported so we can ditch closewait */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | } |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 31 | static ssize_t aoedisk_show_mac(struct device *dev, |
| 32 | struct device_attribute *attr, char *page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 34 | struct gendisk *disk = dev_to_disk(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | struct aoedev *d = disk->private_data; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 36 | struct aoetgt *t = d->targets[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 38 | if (t == NULL) |
| 39 | return snprintf(page, PAGE_SIZE, "none\n"); |
Harvey Harrison | 411c41e | 2008-11-25 00:40:37 -0800 | [diff] [blame] | 40 | return snprintf(page, PAGE_SIZE, "%pm\n", t->addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | } |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 42 | static ssize_t aoedisk_show_netif(struct device *dev, |
| 43 | struct device_attribute *attr, char *page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 45 | struct gendisk *disk = dev_to_disk(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | struct aoedev *d = disk->private_data; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 47 | struct net_device *nds[8], **nd, **nnd, **ne; |
| 48 | struct aoetgt **t, **te; |
| 49 | struct aoeif *ifp, *e; |
| 50 | char *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 52 | memset(nds, 0, sizeof nds); |
| 53 | nd = nds; |
| 54 | ne = nd + ARRAY_SIZE(nds); |
| 55 | t = d->targets; |
| 56 | te = t + NTARGETS; |
| 57 | for (; t < te && *t; t++) { |
| 58 | ifp = (*t)->ifs; |
| 59 | e = ifp + NAOEIFS; |
| 60 | for (; ifp < e && ifp->nd; ifp++) { |
| 61 | for (nnd = nds; nnd < nd; nnd++) |
| 62 | if (*nnd == ifp->nd) |
| 63 | break; |
| 64 | if (nnd == nd && nd != ne) |
| 65 | *nd++ = ifp->nd; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | ne = nd; |
| 70 | nd = nds; |
| 71 | if (*nd == NULL) |
| 72 | return snprintf(page, PAGE_SIZE, "none\n"); |
| 73 | for (p = page; nd < ne; nd++) |
| 74 | p += snprintf(p, PAGE_SIZE - (p-page), "%s%s", |
| 75 | p == page ? "" : ",", (*nd)->name); |
| 76 | p += snprintf(p, PAGE_SIZE - (p-page), "\n"); |
| 77 | return p-page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | } |
Ed L Cashin | 4613ed2 | 2005-04-29 10:24:25 -0400 | [diff] [blame] | 79 | /* firmware version */ |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 80 | static ssize_t aoedisk_show_fwver(struct device *dev, |
| 81 | struct device_attribute *attr, char *page) |
Ed L Cashin | 4613ed2 | 2005-04-29 10:24:25 -0400 | [diff] [blame] | 82 | { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 83 | struct gendisk *disk = dev_to_disk(dev); |
Ed L Cashin | 4613ed2 | 2005-04-29 10:24:25 -0400 | [diff] [blame] | 84 | struct aoedev *d = disk->private_data; |
| 85 | |
| 86 | return snprintf(page, PAGE_SIZE, "0x%04x\n", (unsigned int) d->fw_ver); |
| 87 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 89 | static DEVICE_ATTR(state, S_IRUGO, aoedisk_show_state, NULL); |
| 90 | static DEVICE_ATTR(mac, S_IRUGO, aoedisk_show_mac, NULL); |
| 91 | static DEVICE_ATTR(netif, S_IRUGO, aoedisk_show_netif, NULL); |
| 92 | static struct device_attribute dev_attr_firmware_version = { |
Parag Warudkar | 01e8ef1 | 2008-10-18 20:28:50 -0700 | [diff] [blame] | 93 | .attr = { .name = "firmware-version", .mode = S_IRUGO }, |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 94 | .show = aoedisk_show_fwver, |
Ed L Cashin | 4613ed2 | 2005-04-29 10:24:25 -0400 | [diff] [blame] | 95 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Greg Kroah-Hartman | 4ca5224 | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 97 | static struct attribute *aoe_attrs[] = { |
Kay Sievers | edfaa7c | 2007-05-21 22:08:01 +0200 | [diff] [blame] | 98 | &dev_attr_state.attr, |
| 99 | &dev_attr_mac.attr, |
| 100 | &dev_attr_netif.attr, |
| 101 | &dev_attr_firmware_version.attr, |
| 102 | NULL, |
Greg Kroah-Hartman | 4ca5224 | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 103 | }; |
| 104 | |
| 105 | static const struct attribute_group attr_group = { |
| 106 | .attrs = aoe_attrs, |
| 107 | }; |
| 108 | |
| 109 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | aoedisk_add_sysfs(struct aoedev *d) |
| 111 | { |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 112 | return sysfs_create_group(&disk_to_dev(d->gd)->kobj, &attr_group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | } |
| 114 | void |
| 115 | aoedisk_rm_sysfs(struct aoedev *d) |
| 116 | { |
Tejun Heo | ed9e198 | 2008-08-25 19:56:05 +0900 | [diff] [blame] | 117 | sysfs_remove_group(&disk_to_dev(d->gd)->kobj, &attr_group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | static int |
Al Viro | 94562c1 | 2008-03-02 09:23:18 -0500 | [diff] [blame] | 121 | aoeblk_open(struct block_device *bdev, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
Al Viro | 94562c1 | 2008-03-02 09:23:18 -0500 | [diff] [blame] | 123 | struct aoedev *d = bdev->bd_disk->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | ulong flags; |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | spin_lock_irqsave(&d->lock, flags); |
| 127 | if (d->flags & DEVFL_UP) { |
| 128 | d->nopen++; |
| 129 | spin_unlock_irqrestore(&d->lock, flags); |
| 130 | return 0; |
| 131 | } |
| 132 | spin_unlock_irqrestore(&d->lock, flags); |
| 133 | return -ENODEV; |
| 134 | } |
| 135 | |
| 136 | static int |
Al Viro | 94562c1 | 2008-03-02 09:23:18 -0500 | [diff] [blame] | 137 | aoeblk_release(struct gendisk *disk, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
Al Viro | 94562c1 | 2008-03-02 09:23:18 -0500 | [diff] [blame] | 139 | struct aoedev *d = disk->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | ulong flags; |
| 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | spin_lock_irqsave(&d->lock, flags); |
| 143 | |
Ed L. Cashin | 5f7702f | 2006-01-19 13:46:27 -0500 | [diff] [blame] | 144 | if (--d->nopen == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | spin_unlock_irqrestore(&d->lock, flags); |
| 146 | aoecmd_cfg(d->aoemajor, d->aoeminor); |
| 147 | return 0; |
| 148 | } |
| 149 | spin_unlock_irqrestore(&d->lock, flags); |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | static int |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 155 | aoeblk_make_request(struct request_queue *q, struct bio *bio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | { |
David S. Miller | e9bb8fb | 2008-09-21 22:36:49 -0700 | [diff] [blame] | 157 | struct sk_buff_head queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | struct aoedev *d; |
| 159 | struct buf *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | ulong flags; |
| 161 | |
| 162 | blk_queue_bounce(q, &bio); |
| 163 | |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 164 | if (bio == NULL) { |
| 165 | printk(KERN_ERR "aoe: bio is NULL\n"); |
| 166 | BUG(); |
| 167 | return 0; |
| 168 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | d = bio->bi_bdev->bd_disk->private_data; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 170 | if (d == NULL) { |
| 171 | printk(KERN_ERR "aoe: bd_disk->private_data is NULL\n"); |
| 172 | BUG(); |
| 173 | bio_endio(bio, -ENXIO); |
| 174 | return 0; |
Ed Cashin | 18d8217 | 2009-09-10 22:30:47 +0200 | [diff] [blame] | 175 | } else if (bio_rw_flagged(bio, BIO_RW_BARRIER)) { |
| 176 | bio_endio(bio, -EOPNOTSUPP); |
| 177 | return 0; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 178 | } else if (bio->bi_io_vec == NULL) { |
| 179 | printk(KERN_ERR "aoe: bi_io_vec is NULL\n"); |
| 180 | BUG(); |
| 181 | bio_endio(bio, -ENXIO); |
| 182 | return 0; |
| 183 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | buf = mempool_alloc(d->bufpool, GFP_NOIO); |
| 185 | if (buf == NULL) { |
Ed L. Cashin | a12c93f | 2006-09-20 14:36:51 -0400 | [diff] [blame] | 186 | printk(KERN_INFO "aoe: buf allocation failure\n"); |
NeilBrown | 6712ecf | 2007-09-27 12:47:43 +0200 | [diff] [blame] | 187 | bio_endio(bio, -ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | return 0; |
| 189 | } |
| 190 | memset(buf, 0, sizeof(*buf)); |
| 191 | INIT_LIST_HEAD(&buf->bufs); |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 192 | buf->stime = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | buf->bio = bio; |
| 194 | buf->resid = bio->bi_size; |
| 195 | buf->sector = bio->bi_sector; |
Ed L. Cashin | 392e484 | 2006-09-20 14:36:50 -0400 | [diff] [blame] | 196 | buf->bv = &bio->bi_io_vec[bio->bi_idx]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | buf->bv_resid = buf->bv->bv_len; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 198 | WARN_ON(buf->bv_resid == 0); |
| 199 | buf->bv_off = buf->bv->bv_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | spin_lock_irqsave(&d->lock, flags); |
| 202 | |
| 203 | if ((d->flags & DEVFL_UP) == 0) { |
Ed L. Cashin | 1d75981 | 2008-02-08 04:20:08 -0800 | [diff] [blame] | 204 | printk(KERN_INFO "aoe: device %ld.%d is not up\n", |
Ed L. Cashin | a12c93f | 2006-09-20 14:36:51 -0400 | [diff] [blame] | 205 | d->aoemajor, d->aoeminor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | spin_unlock_irqrestore(&d->lock, flags); |
| 207 | mempool_free(buf, d->bufpool); |
NeilBrown | 6712ecf | 2007-09-27 12:47:43 +0200 | [diff] [blame] | 208 | bio_endio(bio, -ENXIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | list_add_tail(&buf->bufs, &d->bufq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 214 | aoecmd_work(d); |
David S. Miller | e9bb8fb | 2008-09-21 22:36:49 -0700 | [diff] [blame] | 215 | __skb_queue_head_init(&queue); |
| 216 | skb_queue_splice_init(&d->sendq, &queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
| 218 | spin_unlock_irqrestore(&d->lock, flags); |
David S. Miller | e9bb8fb | 2008-09-21 22:36:49 -0700 | [diff] [blame] | 219 | aoenet_xmit(&queue); |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | return 0; |
| 222 | } |
| 223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | static int |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 225 | aoeblk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | { |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 227 | struct aoedev *d = bdev->bd_disk->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | if ((d->flags & DEVFL_UP) == 0) { |
Ed L. Cashin | a12c93f | 2006-09-20 14:36:51 -0400 | [diff] [blame] | 230 | printk(KERN_ERR "aoe: disk not up\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | return -ENODEV; |
| 232 | } |
| 233 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 234 | geo->cylinders = d->geo.cylinders; |
| 235 | geo->heads = d->geo.heads; |
| 236 | geo->sectors = d->geo.sectors; |
| 237 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | } |
| 239 | |
Alexey Dobriyan | 83d5cde | 2009-09-21 17:01:13 -0700 | [diff] [blame] | 240 | static const struct block_device_operations aoe_bdops = { |
Al Viro | 94562c1 | 2008-03-02 09:23:18 -0500 | [diff] [blame] | 241 | .open = aoeblk_open, |
| 242 | .release = aoeblk_release, |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 243 | .getgeo = aoeblk_getgeo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | .owner = THIS_MODULE, |
| 245 | }; |
| 246 | |
| 247 | /* alloc_disk and add_disk can sleep */ |
| 248 | void |
| 249 | aoeblk_gdalloc(void *vp) |
| 250 | { |
| 251 | struct aoedev *d = vp; |
| 252 | struct gendisk *gd; |
| 253 | ulong flags; |
| 254 | |
| 255 | gd = alloc_disk(AOE_PARTITIONS); |
| 256 | if (gd == NULL) { |
Ed L. Cashin | 1d75981 | 2008-02-08 04:20:08 -0800 | [diff] [blame] | 257 | printk(KERN_ERR |
| 258 | "aoe: cannot allocate disk structure for %ld.%d\n", |
Ed L. Cashin | 6bb6285f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 259 | d->aoemajor, d->aoeminor); |
Andrew Morton | 43cbe2c | 2007-12-10 15:49:13 -0800 | [diff] [blame] | 260 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | } |
| 262 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 263 | d->bufpool = mempool_create_slab_pool(MIN_BUFS, buf_pool_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | if (d->bufpool == NULL) { |
Ed L. Cashin | 1d75981 | 2008-02-08 04:20:08 -0800 | [diff] [blame] | 265 | printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%d\n", |
Ed L. Cashin | 6bb6285f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 266 | d->aoemajor, d->aoeminor); |
Andrew Morton | 43cbe2c | 2007-12-10 15:49:13 -0800 | [diff] [blame] | 267 | goto err_disk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
| 269 | |
Ed Cashin | 7135a71b | 2009-09-09 14:10:18 +0200 | [diff] [blame] | 270 | d->blkq = blk_alloc_queue(GFP_KERNEL); |
| 271 | if (!d->blkq) |
Andrew Morton | 43cbe2c | 2007-12-10 15:49:13 -0800 | [diff] [blame] | 272 | goto err_mempool; |
Ed Cashin | 7135a71b | 2009-09-09 14:10:18 +0200 | [diff] [blame] | 273 | blk_queue_make_request(d->blkq, aoeblk_make_request); |
Jens Axboe | d993831 | 2009-06-12 14:45:52 +0200 | [diff] [blame] | 274 | d->blkq->backing_dev_info.name = "aoe"; |
Ed Cashin | 7135a71b | 2009-09-09 14:10:18 +0200 | [diff] [blame] | 275 | if (bdi_init(&d->blkq->backing_dev_info)) |
| 276 | goto err_blkq; |
Andrew Morton | 43cbe2c | 2007-12-10 15:49:13 -0800 | [diff] [blame] | 277 | spin_lock_irqsave(&d->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | gd->major = AOE_MAJOR; |
| 279 | gd->first_minor = d->sysminor * AOE_PARTITIONS; |
| 280 | gd->fops = &aoe_bdops; |
| 281 | gd->private_data = d; |
Tejun Heo | 80795ae | 2008-08-25 19:56:07 +0900 | [diff] [blame] | 282 | set_capacity(gd, d->ssize); |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 283 | snprintf(gd->disk_name, sizeof gd->disk_name, "etherd/e%ld.%d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | d->aoemajor, d->aoeminor); |
| 285 | |
Ed Cashin | 7135a71b | 2009-09-09 14:10:18 +0200 | [diff] [blame] | 286 | gd->queue = d->blkq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | d->gd = gd; |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 288 | d->flags &= ~DEVFL_GDALLOC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | d->flags |= DEVFL_UP; |
| 290 | |
| 291 | spin_unlock_irqrestore(&d->lock, flags); |
| 292 | |
| 293 | add_disk(gd); |
| 294 | aoedisk_add_sysfs(d); |
Andrew Morton | 43cbe2c | 2007-12-10 15:49:13 -0800 | [diff] [blame] | 295 | return; |
| 296 | |
Ed Cashin | 7135a71b | 2009-09-09 14:10:18 +0200 | [diff] [blame] | 297 | err_blkq: |
| 298 | blk_cleanup_queue(d->blkq); |
| 299 | d->blkq = NULL; |
Andrew Morton | 43cbe2c | 2007-12-10 15:49:13 -0800 | [diff] [blame] | 300 | err_mempool: |
| 301 | mempool_destroy(d->bufpool); |
| 302 | err_disk: |
| 303 | put_disk(gd); |
| 304 | err: |
| 305 | spin_lock_irqsave(&d->lock, flags); |
| 306 | d->flags &= ~DEVFL_GDALLOC; |
| 307 | spin_unlock_irqrestore(&d->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | void |
| 311 | aoeblk_exit(void) |
| 312 | { |
| 313 | kmem_cache_destroy(buf_pool_cache); |
| 314 | } |
| 315 | |
| 316 | int __init |
| 317 | aoeblk_init(void) |
| 318 | { |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 319 | buf_pool_cache = kmem_cache_create("aoe_bufs", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | sizeof(struct buf), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 321 | 0, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | if (buf_pool_cache == NULL) |
| 323 | return -ENOMEM; |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |