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authorHorst Hummel <horst.hummel@de.ibm.com>2006-04-27 18:40:28 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-04-28 08:33:48 -0700
commit3d052595423b4432f4d599c1aeb1949ac0da7314 (patch)
tree96e173dc99ab9aa4f362959b6334df6ddf6b2a6d /drivers/s390/block/dasd_int.h
parent58268b97f679108d32a882a7fc029585da801975 (diff)
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[PATCH] s390: dasd device identifiers
Generate new sysfs-attribute 'uid' that contains an device specific unique identifier. This can be used to identity multiple ALIASES of the same physical device (PAV). In addition the sysfs-attributes 'vendor' (containing the manufacturer of the device) and 'alias' (identify alias or base device) is added. This is first part of PAV support in LPAR (also valid on zVM). Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
-rw-r--r--drivers/s390/block/dasd_int.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 4293ba8..d4b13e3 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -268,6 +268,16 @@ struct dasd_discipline {
extern struct dasd_discipline *dasd_diag_discipline_pointer;
+/*
+ * Unique identifier for dasd device.
+ */
+struct dasd_uid {
+ __u8 alias;
+ char vendor[4];
+ char serial[15];
+ __u16 ssid;
+ __u8 unit_addr;
+};
/*
* Notification numbers for extended error reporting notifications:
@@ -516,6 +526,8 @@ void dasd_devmap_exit(void);
struct dasd_device *dasd_create_device(struct ccw_device *);
void dasd_delete_device(struct dasd_device *);
+int dasd_get_uid(struct ccw_device *, struct dasd_uid *);
+int dasd_set_uid(struct ccw_device *, struct dasd_uid *);
int dasd_get_feature(struct ccw_device *, int);
int dasd_set_feature(struct ccw_device *, int, int);