/*
* put device into error state
*/
void
top_seterror(ufsvfs_t *ufsvfsp)
{
ml_unit_t *ul = ufsvfsp->vfs_log;
ASSERT(ufsvfsp->vfs_dev == ul->un_dev);
ldl_seterror(ul, "ufs is forcing a ufs log error");
}
void
lqfs_read_strategy(ml_unit_t *ul, buf_t *bp)
{
mt_map_t *logmap = ul->un_logmap;
offset_t mof = ldbtob(bp->b_blkno);
off_t nb = bp->b_bcount;
mapentry_t *age;
char *va;
int (*saviodone)();
int entire_range;
uchar_t ord;
qfsvfs_t *qfsvfsp = ul->un_qfsvfs;
/*
* get a linked list of overlapping deltas
* returns with &mtm->mtm_rwlock held
*/
ord = lqfs_find_ord(qfsvfsp, bp);
entire_range = logmap_list_get(logmap, mof, ord, nb, &age);
/*
* no overlapping deltas were found; read master
*/
if (age == NULL) {
rw_exit(&logmap->mtm_rwlock);
if (ul->un_flags & LDL_ERROR) {
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
biodone(bp);
} else {
LQFS_SET_IOTSTAMP(ul->un_qfsvfs, ddi_get_lbolt());
logstats.ls_lreads.value.ui64++;
if ((bp->b_flags & B_READ) == 0) {
LQFS_MSG(CE_WARN, "lqfs_read_strategy(): "
"bdev_strategy writing mof 0x%x "
"edev %ld nb %d\n", bp->b_blkno * 512,
bp->b_edev, bp->b_bcount);
} else {
LQFS_MSG(CE_WARN, "lqfs_read_strategy(): "
"bdev_strategy reading mof 0x%x "
"edev %ld nb %d\n", bp->b_blkno * 512,
bp->b_edev, bp->b_bcount);
}
(void) bdev_strategy(bp);
#ifdef LQFS_TODO_STATS
lwp_stat_update(LWP_STAT_INBLK, 1);
#endif /* LQFS_TODO_STATS */
}
return;
}
va = bp_mapin_common(bp, VM_SLEEP);
/*
* if necessary, sync read the data from master
* errors are returned in bp
*/
if (!entire_range) {
saviodone = bp->b_iodone;
bp->b_iodone = trans_not_done;
logstats.ls_mreads.value.ui64++;
if ((bp->b_flags & B_READ) == 0) {
LQFS_MSG(CE_WARN, "lqfs_read_strategy(): "
"bdev_strategy writing mof 0x%x edev %ld "
"nb %d\n", bp->b_blkno * 512, bp->b_edev,
bp->b_bcount);
} else {
LQFS_MSG(CE_WARN, "lqfs_read_strategy(): "
"bdev_strategy reading mof 0x%x edev %ld "
"nb %d\n", bp->b_blkno * 512, bp->b_edev,
bp->b_bcount);
}
(void) bdev_strategy(bp);
#ifdef LQFS_TODO_STATS
lwp_stat_update(LWP_STAT_INBLK, 1);
#endif /* LQFS_TODO_STATS */
if (trans_not_wait(bp)) {
ldl_seterror(ul, "Error reading master");
}
bp->b_iodone = saviodone;
}
/*
* sync read the data from the log
* errors are returned inline
*/
if (ldl_read(ul, va, mof, ord, nb, age)) {
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
}
/*
* unlist the deltas
*/
logmap_list_put(logmap, age);
/*
* all done
*/
if (ul->un_flags & LDL_ERROR) {
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
}
biodone(bp);
}
