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Add an ioctl to return the unit numbers of the configured md devices.

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This commit is contained in:
Poul-Henning Kamp 2003-01-27 07:54:59 +00:00
parent c57bc2b10e
commit b6532aa9a5
1 changed files with 3 additions and 1 deletions
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4
sys/sys/mdioctl.h
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@ -53,6 +53,7 @@ enum md_types {MD_MALLOC, MD_PRELOAD, MD_VNODE, MD_SWAP};
* Ioctl definitions for memory disk pseudo-device.
*/
#define MDNPAD 100
struct md_ioctl {
unsigned md_version; /* Structure layout version */
unsigned md_unit; /* unit number */
@ -61,7 +62,7 @@ struct md_ioctl {
unsigned md_size; /* size of disk in DEV_BSIZE units */
unsigned md_options; /* options */
u_int64_t md_base; /* base address */
int pad[100]; /* padding for future ideas */
int md_pad[MDNPAD]; /* padding for future ideas */
};
#define MD_NAME "md"
@ -78,6 +79,7 @@ struct md_ioctl {
#define MDIOCATTACH _IOWR('m', 0, struct md_ioctl) /* attach disk */
#define MDIOCDETACH _IOWR('m', 1, struct md_ioctl) /* detach disk */
#define MDIOCQUERY _IOWR('m', 2, struct md_ioctl) /* query status */
#define MDIOCLIST _IOWR('m', 3, struct md_ioctl) /* query status */
#define MD_CLUSTER 0x01 /* Don't cluster */
#define MD_RESERVE 0x02 /* Pre-reserve swap */