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Rework many comments.

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requeststatus:
  add REQUEST_DEGRADED status

struct rqinfo:
  add members devmajor and devminor to compensate for lost dev_t.
This commit is contained in:
grog 1999-08-07 08:05:19 +00:00
parent d0cd160775
commit 34ea895440
1 changed files with 20 additions and 19 deletions
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39
sys/dev/vinum/request.h
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@ -33,7 +33,7 @@
* otherwise) arising in any way out of the use of this software, even if
* advised of the possibility of such damage.
*
* $Id: request.h,v 1.14 1999/03/16 03:37:50 grog Exp grog $
* $Id: request.h,v 1.15 1999/07/05 02:39:00 grog Exp grog $
*/
/* Information needed to set up a transfer */
@ -85,16 +85,14 @@ struct rqelement {
daddr_t sdoffset; /* offset in subdisk */
int useroffset; /* offset in user buffer of normal data */
/*
* dataoffset and datalen refer to
* "individual" data transfers which involve
* only this drive (normal read, parityless
* write) and also degraded write.
* dataoffset and datalen refer to "individual" data
* transfers which involve only this drive (normal read,
* parityless write) and also degraded write.
*
* groupoffset and grouplen refer to the other
* "group" operations (normal write, recovery
* read) which involve more than one drive.
* Both the offsets are relative to the start
* of the local buffer.
* groupoffset and grouplen refer to the other "group"
* operations (normal write, recovery read) which involve
* more than one drive. Both the offsets are relative to
* the start of the local buffer.
*/
int dataoffset; /* offset in buffer of the normal data */
int groupoffset; /* offset in buffer of group data */
@ -108,8 +106,8 @@ struct rqelement {
};
/*
* A group of requests built to satisfy a certain
* component of a user request.
* A group of requests built to satisfy an I/O
* transfer on a single plex.
*/
struct rqgroup {
struct rqgroup *next; /* pointer to next group */
@ -154,17 +152,18 @@ struct sdbuf {
};
/*
* Values returned by rqe and friends.
* Be careful with these: they are in order of increasing
* seriousness. Some routines check for > REQUEST_RECOVERED
* to indicate a completely failed request.
* Values returned by rqe and friends. Be careful
* with these: they are in order of increasing
* seriousness. Some routines check for
* > REQUEST_RECOVERED to indicate a failed request. XXX
*/
enum requeststatus {
REQUEST_OK, /* request built OK */
REQUEST_RECOVERED, /* request OK, but involves RAID5 recovery */
REQUEST_EOF, /* request failed: outside plex */
REQUEST_DOWN, /* request failed: subdisk down */
REQUEST_ENOMEM /* ran out of memory */
REQUEST_DEGRADED, /* parts of request failed */
REQUEST_EOF, /* parts of request failed: outside plex */
REQUEST_DOWN, /* all of request failed: subdisk(s) down */
REQUEST_ENOMEM /* all of request failed: ran out of memory */
};
#ifdef VINUMDEBUG
@ -188,6 +187,8 @@ struct rqinfo {
enum rqinfo_type type; /* kind of event */
struct timeval timestamp; /* time it happened */
struct buf *bp; /* point to user buffer */
int devmajor; /* major and minor device info */
int devminor;
union {
struct buf b; /* yup, the *whole* buffer header */
struct rqelement rqe; /* and the whole rqe */