aoeblk.c revision 43cbe2cbdd5320f1ac785c6f016923609831effe
12611464d7f36685fb1990275d3de1e72e6aff9d9Ed L. Cashin/* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */ 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * aoeblk.c 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * block device routines 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/hdreg.h> 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkdev.h> 943cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton#include <linux/backing-dev.h> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ioctl.h> 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/genhd.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/netdevice.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "aoe.h" 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16e18b890bb0881bbab6f4f1a6cd20d9c60d66b003Christoph Lameterstatic struct kmem_cache *buf_pool_cache; 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t aoedisk_show_state(struct gendisk * disk, char *page) 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d = disk->private_data; 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return snprintf(page, PAGE_SIZE, 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "%s%s\n", 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (d->flags & DEVFL_UP) ? "up" : "down", 253ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin (d->flags & DEVFL_PAUSE) ? ",paused" : 263ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin (d->nopen && !(d->flags & DEVFL_UP)) ? ",closewait" : ""); 273ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin /* I'd rather see nopen exported so we can ditch closewait */ 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t aoedisk_show_mac(struct gendisk * disk, char *page) 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d = disk->private_data; 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return snprintf(page, PAGE_SIZE, "%012llx\n", 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)mac_addr(d->addr)); 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t aoedisk_show_netif(struct gendisk * disk, char *page) 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d = disk->private_data; 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return snprintf(page, PAGE_SIZE, "%s\n", d->ifp->name); 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 424613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin/* firmware version */ 434613ed277ab8a41640434181898ef4649cc7301eEd L. Cashinstatic ssize_t aoedisk_show_fwver(struct gendisk * disk, char *page) 444613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin{ 454613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin struct aoedev *d = disk->private_data; 464613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin 474613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin return snprintf(page, PAGE_SIZE, "0x%04x\n", (unsigned int) d->fw_ver); 484613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin} 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct disk_attribute disk_attr_state = { 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .attr = {.name = "state", .mode = S_IRUGO }, 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .show = aoedisk_show_state 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct disk_attribute disk_attr_mac = { 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .attr = {.name = "mac", .mode = S_IRUGO }, 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .show = aoedisk_show_mac 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct disk_attribute disk_attr_netif = { 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .attr = {.name = "netif", .mode = S_IRUGO }, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .show = aoedisk_show_netif 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 624613ed277ab8a41640434181898ef4649cc7301eEd L. Cashinstatic struct disk_attribute disk_attr_fwver = { 634613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin .attr = {.name = "firmware-version", .mode = S_IRUGO }, 644613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin .show = aoedisk_show_fwver 654613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin}; 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 674ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartmanstatic struct attribute *aoe_attrs[] = { 684ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman &disk_attr_state.attr, 694ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman &disk_attr_mac.attr, 704ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman &disk_attr_netif.attr, 714ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman &disk_attr_fwver.attr, 72d355c3c23ce56ab83e41f2bfb30d02fb90618530Dennis Stosberg NULL 734ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman}; 744ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman 754ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartmanstatic const struct attribute_group attr_group = { 764ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman .attrs = aoe_attrs, 774ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman}; 784ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman 794ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartmanstatic int 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoedisk_add_sysfs(struct aoedev *d) 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 824ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman return sysfs_create_group(&d->gd->kobj, &attr_group); 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoedisk_rm_sysfs(struct aoedev *d) 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 874ca5224f3ea4779054d96e885ca9b3980801ce13Greg Kroah-Hartman sysfs_remove_group(&d->gd->kobj, &attr_group); 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_open(struct inode *inode, struct file *filp) 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ulong flags; 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = inode->i_bdev->bd_disk->private_data; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (d->flags & DEVFL_UP) { 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->nopen++; 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_release(struct inode *inode, struct file *filp) 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ulong flags; 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = inode->i_bdev->bd_disk->private_data; 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1185f7702fd737d14de3ed06a94a1655be9d43f7e35Ed L. Cashin if (--d->nopen == 0) { 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aoecmd_cfg(d->aoemajor, d->aoeminor); 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 129165125e1e480f9510a5ffcfbfee4e3ee38c05f23Jens Axboeaoeblk_make_request(struct request_queue *q, struct bio *bio) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct buf *buf; 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sk_buff *sl; 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ulong flags; 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds blk_queue_bounce(q, &bio); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = bio->bi_bdev->bd_disk->private_data; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf = mempool_alloc(d->bufpool, GFP_NOIO); 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buf == NULL) { 141a12c93f08b8fc83b7fcdabaf92b1adcea7489f5eEd L. Cashin printk(KERN_INFO "aoe: buf allocation failure\n"); 1426712ecf8f648118c3363c142196418f89a510b90NeilBrown bio_endio(bio, -ENOMEM); 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, sizeof(*buf)); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&buf->bufs); 1470c6f0e7920f39b28bdbe5f134f3e592542332d87Ed L. Cashin buf->start_time = jiffies; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bio = bio; 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->resid = bio->bi_size; 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->sector = bio->bi_sector; 151392e4845f9728114f7ffa8d7612683397fd4d441Ed L. Cashin buf->bv = &bio->bi_io_vec[bio->bi_idx]; 152392e4845f9728114f7ffa8d7612683397fd4d441Ed L. Cashin WARN_ON(buf->bv->bv_len == 0); 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bv_resid = buf->bv->bv_len; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset; 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((d->flags & DEVFL_UP) == 0) { 159a12c93f08b8fc83b7fcdabaf92b1adcea7489f5eEd L. Cashin printk(KERN_INFO "aoe: device %ld.%ld is not up\n", 160a12c93f08b8fc83b7fcdabaf92b1adcea7489f5eEd L. Cashin d->aoemajor, d->aoeminor); 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mempool_free(buf, d->bufpool); 1636712ecf8f648118c3363c142196418f89a510b90NeilBrown bio_endio(bio, -ENXIO); 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail(&buf->bufs, &d->bufq); 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1693ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin aoecmd_work(d); 170a4b38364093bf2094ff858ad45f490521bb87984Ed L. Cashin sl = d->sendq_hd; 171a4b38364093bf2094ff858ad45f490521bb87984Ed L. Cashin d->sendq_hd = d->sendq_tl = NULL; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aoenet_xmit(sl); 1753ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 180a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwigaoeblk_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 182a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig struct aoedev *d = bdev->bd_disk->private_data; 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((d->flags & DEVFL_UP) == 0) { 185a12c93f08b8fc83b7fcdabaf92b1adcea7489f5eEd L. Cashin printk(KERN_ERR "aoe: disk not up\n"); 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 189a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->cylinders = d->geo.cylinders; 190a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->heads = d->geo.heads; 191a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->sectors = d->geo.sectors; 192a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig return 0; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct block_device_operations aoe_bdops = { 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .open = aoeblk_open, 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = aoeblk_release, 198a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig .getgeo = aoeblk_getgeo, 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* alloc_disk and add_disk can sleep */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_gdalloc(void *vp) 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d = vp; 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gendisk *gd; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ulong flags; 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd = alloc_disk(AOE_PARTITIONS); 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gd == NULL) { 212a12c93f08b8fc83b7fcdabaf92b1adcea7489f5eEd L. Cashin printk(KERN_ERR "aoe: cannot allocate disk structure for %ld.%ld\n", 2136bb6285fdb948cedee586c6bebc9ebc5e32a5c35Ed L. Cashin d->aoemajor, d->aoeminor); 21443cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton goto err; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21793d2341c750cda0df48a6cc67b35fe25f1ec47dfMatthew Dobson d->bufpool = mempool_create_slab_pool(MIN_BUFS, buf_pool_cache); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (d->bufpool == NULL) { 219a12c93f08b8fc83b7fcdabaf92b1adcea7489f5eEd L. Cashin printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%ld\n", 2206bb6285fdb948cedee586c6bebc9ebc5e32a5c35Ed L. Cashin d->aoemajor, d->aoeminor); 22143cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton goto err_disk; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds blk_queue_make_request(&d->blkq, aoeblk_make_request); 22543cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton if (bdi_init(&d->blkq.backing_dev_info)) 22643cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton goto err_mempool; 22743cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton spin_lock_irqsave(&d->lock, flags); 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->major = AOE_MAJOR; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->first_minor = d->sysminor * AOE_PARTITIONS; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->fops = &aoe_bdops; 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->private_data = d; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->capacity = d->ssize; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(gd->disk_name, sizeof gd->disk_name, "etherd/e%ld.%ld", 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->aoemajor, d->aoeminor); 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->queue = &d->blkq; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->gd = gd; 2383ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin d->flags &= ~DEVFL_GDALLOC; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->flags |= DEVFL_UP; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_disk(gd); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aoedisk_add_sysfs(d); 24543cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton return; 24643cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton 24743cbe2cbdd5320f1ac785c6f016923609831effeAndrew Mortonerr_mempool: 24843cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton mempool_destroy(d->bufpool); 24943cbe2cbdd5320f1ac785c6f016923609831effeAndrew Mortonerr_disk: 25043cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton put_disk(gd); 25143cbe2cbdd5320f1ac785c6f016923609831effeAndrew Mortonerr: 25243cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton spin_lock_irqsave(&d->lock, flags); 25343cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton d->flags &= ~DEVFL_GDALLOC; 25443cbe2cbdd5320f1ac785c6f016923609831effeAndrew Morton spin_unlock_irqrestore(&d->lock, flags); 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_exit(void) 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kmem_cache_destroy(buf_pool_cache); 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint __init 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_init(void) 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26620c2df83d25c6a95affe6157a4c9cac4cf5ffaacPaul Mundt buf_pool_cache = kmem_cache_create("aoe_bufs", 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(struct buf), 26820c2df83d25c6a95affe6157a4c9cac4cf5ffaacPaul Mundt 0, 0, NULL); 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buf_pool_cache == NULL) 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 275