From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/block/aoe/aoeblk.c | 464 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 464 insertions(+) create mode 100644 kernel/drivers/block/aoe/aoeblk.c (limited to 'kernel/drivers/block/aoe/aoeblk.c') diff --git a/kernel/drivers/block/aoe/aoeblk.c b/kernel/drivers/block/aoe/aoeblk.c new file mode 100644 index 000000000..46c282fff --- /dev/null +++ b/kernel/drivers/block/aoe/aoeblk.c @@ -0,0 +1,464 @@ +/* Copyright (c) 2013 Coraid, Inc. See COPYING for GPL terms. */ +/* + * aoeblk.c + * block device routines + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "aoe.h" + +static DEFINE_MUTEX(aoeblk_mutex); +static struct kmem_cache *buf_pool_cache; +static struct dentry *aoe_debugfs_dir; + +/* GPFS needs a larger value than the default. */ +static int aoe_maxsectors; +module_param(aoe_maxsectors, int, 0644); +MODULE_PARM_DESC(aoe_maxsectors, + "When nonzero, set the maximum number of sectors per I/O request"); + +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 + d->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 ssize_t aoedisk_show_payload(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, "%lu\n", d->maxbcnt); +} + +static int aoedisk_debugfs_show(struct seq_file *s, void *ignored) +{ + struct aoedev *d; + struct aoetgt **t, **te; + struct aoeif *ifp, *ife; + unsigned long flags; + char c; + + d = s->private; + seq_printf(s, "rttavg: %d rttdev: %d\n", + d->rttavg >> RTTSCALE, + d->rttdev >> RTTDSCALE); + seq_printf(s, "nskbpool: %d\n", skb_queue_len(&d->skbpool)); + seq_printf(s, "kicked: %ld\n", d->kicked); + seq_printf(s, "maxbcnt: %ld\n", d->maxbcnt); + seq_printf(s, "ref: %ld\n", d->ref); + + spin_lock_irqsave(&d->lock, flags); + t = d->targets; + te = t + d->ntargets; + for (; t < te && *t; t++) { + c = '\t'; + seq_printf(s, "falloc: %ld\n", (*t)->falloc); + seq_printf(s, "ffree: %p\n", + list_empty(&(*t)->ffree) ? NULL : (*t)->ffree.next); + seq_printf(s, "%pm:%d:%d:%d\n", (*t)->addr, (*t)->nout, + (*t)->maxout, (*t)->nframes); + seq_printf(s, "\tssthresh:%d\n", (*t)->ssthresh); + seq_printf(s, "\ttaint:%d\n", (*t)->taint); + seq_printf(s, "\tr:%d\n", (*t)->rpkts); + seq_printf(s, "\tw:%d\n", (*t)->wpkts); + ifp = (*t)->ifs; + ife = ifp + ARRAY_SIZE((*t)->ifs); + for (; ifp->nd && ifp < ife; ifp++) { + seq_printf(s, "%c%s", c, ifp->nd->name); + c = ','; + } + seq_puts(s, "\n"); + } + spin_unlock_irqrestore(&d->lock, flags); + + return 0; +} + +static int aoe_debugfs_open(struct inode *inode, struct file *file) +{ + return single_open(file, aoedisk_debugfs_show, inode->i_private); +} + +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 DEVICE_ATTR(payload, S_IRUGO, aoedisk_show_payload, NULL); + +static struct attribute *aoe_attrs[] = { + &dev_attr_state.attr, + &dev_attr_mac.attr, + &dev_attr_netif.attr, + &dev_attr_firmware_version.attr, + &dev_attr_payload.attr, + NULL, +}; + +static const struct attribute_group attr_group = { + .attrs = aoe_attrs, +}; + +static const struct file_operations aoe_debugfs_fops = { + .open = aoe_debugfs_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void +aoedisk_add_debugfs(struct aoedev *d) +{ + struct dentry *entry; + char *p; + + if (aoe_debugfs_dir == NULL) + return; + p = strchr(d->gd->disk_name, '/'); + if (p == NULL) + p = d->gd->disk_name; + else + p++; + BUG_ON(*p == '\0'); + entry = debugfs_create_file(p, 0444, aoe_debugfs_dir, d, + &aoe_debugfs_fops); + if (IS_ERR_OR_NULL(entry)) { + pr_info("aoe: cannot create debugfs file for %s\n", + d->gd->disk_name); + return; + } + BUG_ON(d->debugfs); + d->debugfs = entry; +} +void +aoedisk_rm_debugfs(struct aoedev *d) +{ + debugfs_remove(d->debugfs); + d->debugfs = NULL; +} + +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; + + if (!virt_addr_valid(d)) { + pr_crit("aoe: invalid device pointer in %s\n", + __func__); + WARN_ON(1); + return -ENODEV; + } + if (!(d->flags & DEVFL_UP) || d->flags & DEVFL_TKILL) + return -ENODEV; + + mutex_lock(&aoeblk_mutex); + spin_lock_irqsave(&d->lock, flags); + if (d->flags & DEVFL_UP && !(d->flags & DEVFL_TKILL)) { + 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 void +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; + } + spin_unlock_irqrestore(&d->lock, flags); +} + +static void +aoeblk_request(struct request_queue *q) +{ + struct aoedev *d; + struct request *rq; + + d = q->queuedata; + if ((d->flags & DEVFL_UP) == 0) { + pr_info_ratelimited("aoe: device %ld.%d is not up\n", + d->aoemajor, d->aoeminor); + while ((rq = blk_peek_request(q))) { + blk_start_request(rq); + aoe_end_request(d, rq, 1); + } + return; + } + aoecmd_work(d); +} + +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 int +aoeblk_ioctl(struct block_device *bdev, fmode_t mode, uint cmd, ulong arg) +{ + struct aoedev *d; + + if (!arg) + return -EINVAL; + + d = bdev->bd_disk->private_data; + if ((d->flags & DEVFL_UP) == 0) { + pr_err("aoe: disk not up\n"); + return -ENODEV; + } + + if (cmd == HDIO_GET_IDENTITY) { + if (!copy_to_user((void __user *) arg, &d->ident, + sizeof(d->ident))) + return 0; + return -EFAULT; + } + + /* udev calls scsi_id, which uses SG_IO, resulting in noise */ + if (cmd != SG_IO) + pr_info("aoe: unknown ioctl 0x%x\n", cmd); + + return -ENOTTY; +} + +static const struct block_device_operations aoe_bdops = { + .open = aoeblk_open, + .release = aoeblk_release, + .ioctl = aoeblk_ioctl, + .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; + mempool_t *mp; + struct request_queue *q; + enum { KB = 1024, MB = KB * KB, READ_AHEAD = 2 * MB, }; + ulong flags; + int late = 0; + + spin_lock_irqsave(&d->lock, flags); + if (d->flags & DEVFL_GDALLOC + && !(d->flags & DEVFL_TKILL) + && !(d->flags & DEVFL_GD_NOW)) + d->flags |= DEVFL_GD_NOW; + else + late = 1; + spin_unlock_irqrestore(&d->lock, flags); + if (late) + return; + + gd = alloc_disk(AOE_PARTITIONS); + if (gd == NULL) { + pr_err("aoe: cannot allocate disk structure for %ld.%d\n", + d->aoemajor, d->aoeminor); + goto err; + } + + mp = mempool_create(MIN_BUFS, mempool_alloc_slab, mempool_free_slab, + buf_pool_cache); + if (mp == NULL) { + printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%d\n", + d->aoemajor, d->aoeminor); + goto err_disk; + } + q = blk_init_queue(aoeblk_request, &d->lock); + if (q == NULL) { + pr_err("aoe: cannot allocate block queue for %ld.%d\n", + d->aoemajor, d->aoeminor); + goto err_mempool; + } + + spin_lock_irqsave(&d->lock, flags); + WARN_ON(!(d->flags & DEVFL_GD_NOW)); + WARN_ON(!(d->flags & DEVFL_GDALLOC)); + WARN_ON(d->flags & DEVFL_TKILL); + WARN_ON(d->gd); + WARN_ON(d->flags & DEVFL_UP); + blk_queue_max_hw_sectors(q, 1024); + q->backing_dev_info.name = "aoe"; + q->backing_dev_info.ra_pages = READ_AHEAD / PAGE_CACHE_SIZE; + d->bufpool = mp; + d->blkq = gd->queue = q; + q->queuedata = d; + d->gd = gd; + if (aoe_maxsectors) + blk_queue_max_hw_sectors(q, aoe_maxsectors); + gd->major = AOE_MAJOR; + gd->first_minor = d->sysminor; + 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); + + d->flags &= ~DEVFL_GDALLOC; + d->flags |= DEVFL_UP; + + spin_unlock_irqrestore(&d->lock, flags); + + add_disk(gd); + aoedisk_add_sysfs(d); + aoedisk_add_debugfs(d); + + spin_lock_irqsave(&d->lock, flags); + WARN_ON(!(d->flags & DEVFL_GD_NOW)); + d->flags &= ~DEVFL_GD_NOW; + spin_unlock_irqrestore(&d->lock, flags); + return; + +err_mempool: + mempool_destroy(mp); +err_disk: + put_disk(gd); +err: + spin_lock_irqsave(&d->lock, flags); + d->flags &= ~DEVFL_GD_NOW; + schedule_work(&d->work); + spin_unlock_irqrestore(&d->lock, flags); +} + +void +aoeblk_exit(void) +{ + debugfs_remove_recursive(aoe_debugfs_dir); + aoe_debugfs_dir = NULL; + 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; + aoe_debugfs_dir = debugfs_create_dir("aoe", NULL); + if (IS_ERR_OR_NULL(aoe_debugfs_dir)) { + pr_info("aoe: cannot create debugfs directory\n"); + aoe_debugfs_dir = NULL; + } + return 0; +} + -- cgit 1.2.3-korg