aoeblk.c revision 93d2341c750cda0df48a6cc67b35fe25f1ec47df
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Copyright (c) 2004 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> 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ioctl.h> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/genhd.h> 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/netdevice.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "aoe.h" 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic kmem_cache_t *buf_pool_cache; 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* add attributes for our block devices in sysfs */ 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 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoedisk_add_sysfs(struct aoedev *d) 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sysfs_create_file(&d->gd->kobj, &disk_attr_state.attr); 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sysfs_create_file(&d->gd->kobj, &disk_attr_mac.attr); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sysfs_create_file(&d->gd->kobj, &disk_attr_netif.attr); 734613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin sysfs_create_file(&d->gd->kobj, &disk_attr_fwver.attr); 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoedisk_rm_sysfs(struct aoedev *d) 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sysfs_remove_link(&d->gd->kobj, "state"); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sysfs_remove_link(&d->gd->kobj, "mac"); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sysfs_remove_link(&d->gd->kobj, "netif"); 814613ed277ab8a41640434181898ef4649cc7301eEd L. Cashin sysfs_remove_link(&d->gd->kobj, "firmware-version"); 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_open(struct inode *inode, struct file *filp) 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ulong flags; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = inode->i_bdev->bd_disk->private_data; 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (d->flags & DEVFL_UP) { 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->nopen++; 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_release(struct inode *inode, struct file *filp) 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d; 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ulong flags; 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = inode->i_bdev->bd_disk->private_data; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1125f7702fd737d14de3ed06a94a1655be9d43f7e35Ed L. Cashin if (--d->nopen == 0) { 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aoecmd_cfg(d->aoemajor, d->aoeminor); 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_make_request(request_queue_t *q, struct bio *bio) 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d; 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct buf *buf; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sk_buff *sl; 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ulong flags; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds blk_queue_bounce(q, &bio); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = bio->bi_bdev->bd_disk->private_data; 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf = mempool_alloc(d->bufpool, GFP_NOIO); 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buf == NULL) { 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_INFO "aoe: aoeblk_make_request: buf allocation " 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "failure\n"); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bio_endio(bio, bio->bi_size, -ENOMEM); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, sizeof(*buf)); 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&buf->bufs); 1420c6f0e7920f39b28bdbe5f134f3e592542332d87Ed L. Cashin buf->start_time = jiffies; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bio = bio; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->resid = bio->bi_size; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->sector = bio->bi_sector; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bv = buf->bio->bi_io_vec; 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bv_resid = buf->bv->bv_len; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bufaddr = page_address(buf->bv->bv_page) + buf->bv->bv_offset; 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((d->flags & DEVFL_UP) == 0) { 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_INFO "aoe: aoeblk_make_request: device %ld.%ld is not up\n", 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->aoemajor, d->aoeminor); 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mempool_free(buf, d->bufpool); 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bio_endio(bio, bio->bi_size, -ENXIO); 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail(&buf->bufs, &d->bufq); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1633ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin aoecmd_work(d); 164a4b38364093bf2094ff858ad45f490521bb87984Ed L. Cashin sl = d->sendq_hd; 165a4b38364093bf2094ff858ad45f490521bb87984Ed L. Cashin d->sendq_hd = d->sendq_tl = NULL; 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aoenet_xmit(sl); 1693ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 174a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwigaoeblk_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 176a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig struct aoedev *d = bdev->bd_disk->private_data; 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((d->flags & DEVFL_UP) == 0) { 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "aoe: aoeblk_ioctl: disk not up\n"); 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 183a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->cylinders = d->geo.cylinders; 184a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->heads = d->geo.heads; 185a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->sectors = d->geo.sectors; 186a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig return 0; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct block_device_operations aoe_bdops = { 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .open = aoeblk_open, 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = aoeblk_release, 192a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig .getgeo = aoeblk_getgeo, 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* alloc_disk and add_disk can sleep */ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_gdalloc(void *vp) 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct aoedev *d = vp; 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gendisk *gd; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ulong flags; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd = alloc_disk(AOE_PARTITIONS); 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gd == NULL) { 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "aoe: aoeblk_gdalloc: cannot allocate disk " 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "structure for %ld.%ld\n", d->aoemajor, d->aoeminor); 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 2093ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin d->flags &= ~DEVFL_GDALLOC; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21493d2341c750cda0df48a6cc67b35fe25f1ec47dfMatthew Dobson d->bufpool = mempool_create_slab_pool(MIN_BUFS, buf_pool_cache); 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (d->bufpool == NULL) { 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "aoe: aoeblk_gdalloc: cannot allocate bufpool " 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "for %ld.%ld\n", d->aoemajor, d->aoeminor); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_disk(gd); 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 2203ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin d->flags &= ~DEVFL_GDALLOC; 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&d->lock, flags); 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds blk_queue_make_request(&d->blkq, aoeblk_make_request); 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->major = AOE_MAJOR; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->first_minor = d->sysminor * AOE_PARTITIONS; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->fops = &aoe_bdops; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->private_data = d; 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->capacity = d->ssize; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(gd->disk_name, sizeof gd->disk_name, "etherd/e%ld.%ld", 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->aoemajor, d->aoeminor); 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gd->queue = &d->blkq; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->gd = gd; 2373ae1c24e395b2b65326439622223d88d92bfa03aEd L. Cashin d->flags &= ~DEVFL_GDALLOC; 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d->flags |= DEVFL_UP; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&d->lock, flags); 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_disk(gd); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aoedisk_add_sysfs(d); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_exit(void) 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kmem_cache_destroy(buf_pool_cache); 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint __init 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsaoeblk_init(void) 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf_pool_cache = kmem_cache_create("aoe_bufs", 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(struct buf), 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, 0, NULL, NULL); 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buf_pool_cache == NULL) 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 264