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aoe: provide ATA identify device content to user on request

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Make the aoe driver follow expected behavior when the user uses ioctl to
get the ATA device identify information, allowing access to model, serial
number, etc.

Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ed Cashin 2012-12-17 16:03:42 -08:00 committed by Linus Torvalds
parent cd220bf51f
commit 667be1e757
3 changed files with 47 additions and 0 deletions
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1
drivers/block/aoe/aoe.h
View File

@ -169,6 +169,7 @@ struct aoedev {
struct aoetgt *htgt; /* target needing rexmit assistance */
ulong ntargets;
ulong kicked;
char ident[512];
};
/* kthread tracking */

30
drivers/block/aoe/aoeblk.c
View File

@ -17,6 +17,7 @@
#include <linux/mutex.h>
#include <linux/export.h>
#include <linux/moduleparam.h>
#include <scsi/sg.h>
#include "aoe.h"
static DEFINE_MUTEX(aoeblk_mutex);
@ -212,9 +213,38 @@ aoeblk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
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,
};

16
drivers/block/aoe/aoecmd.c
View File

@ -798,6 +798,17 @@ aoecmd_sleepwork(struct work_struct *work)
}
}
static void
ata_ident_fixstring(u16 *id, int ns)
{
u16 s;
while (ns-- > 0) {
s = *id;
*id++ = s >> 8 | s << 8;
}
}
static void
ataid_complete(struct aoedev *d, struct aoetgt *t, unsigned char *id)
{
@ -833,6 +844,11 @@ ataid_complete(struct aoedev *d, struct aoetgt *t, unsigned char *id)
d->geo.sectors = get_unaligned_le16(&id[56 << 1]);
}
ata_ident_fixstring((u16 *) &id[10<<1], 10); /* serial */
ata_ident_fixstring((u16 *) &id[23<<1], 4); /* firmware */
ata_ident_fixstring((u16 *) &id[27<<1], 20); /* model */
memcpy(d->ident, id, sizeof(d->ident));
if (d->ssize != ssize)
printk(KERN_INFO
"aoe: %pm e%ld.%d v%04x has %llu sectors\n",