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Clone the {b|bio}_offset field, and make sure it is always initialized

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in struct bio.  Eventually, bio_offset will probably obsolete the
bio_blkno and bio_pblkno fields.

Remove the special hack in atapi-cd.c to determine of bio_offset was valid.
This commit is contained in:
phk 2000-04-25 10:51:18 +00:00
parent 7dbc44ea92
commit a708c222de
6 changed files with 21 additions and 18 deletions
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9
sys/dev/ata/atapi-cd.c
View File

@ -1146,14 +1146,7 @@ acd_start(struct atapi_softc *atp)
bzero(ccb, sizeof(ccb));
count = (bp->bio_bcount + (cdp->block_size - 1)) / cdp->block_size;
{
/* XXX Hack until b_offset is always initialized */
struct buf *bup = (struct buf *)bp;
if (bup->b_flags & B_PHYS)
lba = bup->b_offset / cdp->block_size;
else
lba = bp->bio_blkno / (cdp->block_size / DEV_BSIZE);
}
lba = bp->bio_offset / cdp->block_size;
if (bp->bio_cmd == BIO_READ) {
/* if transfer goes beyond EOM adjust it to be within limits */

2
sys/kern/subr_disk.c
View File

@ -201,6 +201,8 @@ diskstrategy(struct bio *bp)
return;
}
KASSERT(dp->d_devsw != NULL, ("NULL devsw"));
KASSERT(dp->d_devsw->d_strategy != NULL, ("NULL d_strategy"));
dp->d_devsw->d_strategy(bp);
return;

2
sys/sys/bio.h
View File

@ -137,9 +137,9 @@ struct buf {
#define b_iodone b_io.bio_done
#define b_iodone_chain b_io.bio_done_chain
#define b_ioflags b_io.bio_flags
#define b_offset b_io.bio_offset
#define b_pblkno b_io.bio_pblkno
#define b_resid b_io.bio_resid
off_t b_offset; /* Offset into file. */
LIST_ENTRY(buf) b_hash; /* Hash chain. */
TAILQ_ENTRY(buf) b_vnbufs; /* Buffer's associated vnode. */
TAILQ_ENTRY(buf) b_freelist; /* Free list position if not active. */

2
sys/sys/buf.h
View File

@ -137,9 +137,9 @@ struct buf {
#define b_iodone b_io.bio_done
#define b_iodone_chain b_io.bio_done_chain
#define b_ioflags b_io.bio_flags
#define b_offset b_io.bio_offset
#define b_pblkno b_io.bio_pblkno
#define b_resid b_io.bio_resid
off_t b_offset; /* Offset into file. */
LIST_ENTRY(buf) b_hash; /* Hash chain. */
TAILQ_ENTRY(buf) b_vnbufs; /* Buffer's associated vnode. */
TAILQ_ENTRY(buf) b_freelist; /* Free list position if not active. */

12
sys/sys/conf.h
View File

@ -138,11 +138,15 @@ typedef void devfs_remove_t __P((dev_t dev));
* of surgery, reset the flag and restart all the stuff on the stall
* queue.
*/
#define DEV_STRATEGY(bp, dummy) \
do { \
#define DEV_STRATEGY(bp, dummy) \
do { \
if ((!(bp)->b_iocmd) || ((bp)->b_iocmd & ((bp)->b_iocmd - 1))) \
Debugger("d_iocmd botch"); \
(*devsw((bp)->b_dev)->d_strategy)(&(bp)->b_io); \
Debugger("d_iocmd botch"); \
if ((bp)->b_flags & B_PHYS) \
(bp)->b_io.bio_offset = (bp)->b_offset; \
else \
(bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \
(*devsw((bp)->b_dev)->d_strategy)(&(bp)->b_io); \
} while (0)
/*

12
sys/sys/linedisc.h
View File

@ -138,11 +138,15 @@ typedef void devfs_remove_t __P((dev_t dev));
* of surgery, reset the flag and restart all the stuff on the stall
* queue.
*/
#define DEV_STRATEGY(bp, dummy) \
do { \
#define DEV_STRATEGY(bp, dummy) \
do { \
if ((!(bp)->b_iocmd) || ((bp)->b_iocmd & ((bp)->b_iocmd - 1))) \
Debugger("d_iocmd botch"); \
(*devsw((bp)->b_dev)->d_strategy)(&(bp)->b_io); \
Debugger("d_iocmd botch"); \
if ((bp)->b_flags & B_PHYS) \
(bp)->b_io.bio_offset = (bp)->b_offset; \
else \
(bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \
(*devsw((bp)->b_dev)->d_strategy)(&(bp)->b_io); \
} while (0)
/*