diff options
| author | Ed Cashin <ecashin@coraid.com> | 2012-10-05 02:16:40 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-05 20:05:28 +0200 |
| commit | 0c966214589b9767fd8771b71328f83bac58cb25 (patch) | |
| tree | fa46832f149cb30b1847bc6eee13e79ef9c0c444 /drivers/block/aoe/aoe.h | |
| parent | aoe: update documentation with new URL and VM settings reference (diff) | |
| download | linux-0c966214589b9767fd8771b71328f83bac58cb25.tar.xz linux-0c966214589b9767fd8771b71328f83bac58cb25.zip | |
aoe: support more AoE addresses with dynamic block device minor numbers
The ATA over Ethernet protocol uses a major (shelf) and minor (slot)
address to identify a particular storage target. These changes remove an
artificial limitation the aoe driver imposes on the use of AoE addresses.
For example, without these changes, the slot address has a maximum of 15,
but users commonly use slot numbers much greater than that.
The AoE shelf and slot address space is often used sparsely. Instead of
using a static mapping between AoE addresses and the block device minor
number, the block device minor numbers are now allocated on demand.
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>
Diffstat (limited to 'drivers/block/aoe/aoe.h')
| -rw-r--r-- | drivers/block/aoe/aoe.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/block/aoe/aoe.h b/drivers/block/aoe/aoe.h index 27d0a214f3bc..7b694f7da2de 100644 --- a/drivers/block/aoe/aoe.h +++ b/drivers/block/aoe/aoe.h @@ -49,6 +49,8 @@ struct aoe_hdr { __be32 tag; }; +#define AOE_MAXSHELF (0xffff-1) /* one less than the broadcast shelf address */ + struct aoe_atahdr { unsigned char aflags; unsigned char errfeat; @@ -211,8 +213,7 @@ void aoe_ktstop(struct ktstate *k); int aoedev_init(void); void aoedev_exit(void); -struct aoedev *aoedev_by_aoeaddr(int maj, int min); -struct aoedev *aoedev_by_sysminor_m(ulong sysminor); +struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc); void aoedev_downdev(struct aoedev *d); int aoedev_flush(const char __user *str, size_t size); void aoe_failbuf(struct aoedev *, struct buf *); @@ -223,4 +224,3 @@ void aoenet_exit(void); void aoenet_xmit(struct sk_buff_head *); int is_aoe_netif(struct net_device *ifp); int set_aoe_iflist(const char __user *str, size_t size); - |