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Be more explicit about what each bio_cmd & bio_flags value means.

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Reviewed by:	ken (mentor)
This commit is contained in:
Will Andrews 2013-03-23 16:55:07 +00:00
parent 58567a1b4e
commit ef04b888d2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=248654
1 changed files with 12 additions and 8 deletions
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20
sys/sys/bio.h
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@ -41,19 +41,23 @@
#include <sys/queue.h>
/* bio_cmd */
#define BIO_READ 0x01
#define BIO_WRITE 0x02
#define BIO_DELETE 0x04
#define BIO_GETATTR 0x08
#define BIO_FLUSH 0x10
#define BIO_READ 0x01 /* Read I/O data */
#define BIO_WRITE 0x02 /* Write I/O data */
#define BIO_DELETE 0x04 /* TRIM or free blocks, i.e. mark as unused */
#define BIO_GETATTR 0x08 /* Get GEOM attributes of object */
#define BIO_FLUSH 0x10 /* Commit outstanding I/O now */
#define BIO_CMD0 0x20 /* Available for local hacks */
#define BIO_CMD1 0x40 /* Available for local hacks */
#define BIO_CMD2 0x80 /* Available for local hacks */
/* bio_flags */
#define BIO_ERROR 0x01
#define BIO_DONE 0x02
#define BIO_ONQUEUE 0x04
#define BIO_ERROR 0x01 /* An error occurred processing this bio. */
#define BIO_DONE 0x02 /* This bio is finished. */
#define BIO_ONQUEUE 0x04 /* This bio is in a queue & not yet taken. */
/*
* This bio must be executed after all previous bios in the queue have been
* executed, and before any successive bios can be executed.
*/
#define BIO_ORDERED 0x08
#define BIO_UNMAPPED 0x10
#define BIO_TRANSIENT_MAPPING 0x20