Get counting volume I/Os right.
launch_requests: Be macho, throw away the safety net and walk the
tightrope with no splbio().
Add some comments explaining the smoke and mirrors.
Remove some redundant braces.
sdio: Set the state of an accessed but down subdisk correctly. This
appears to duplicate an earlier commit that I hadn't seen.
Get counting volume I/Os right.
Count buffer sizes correctly for architectures where ints are not 32 bits.
complete_rqe: Move decrementing active count until after call to
complete_raid5_write, thus possibly avoiding a race condition.
Suggested-by: dillon
Rename user bp to ubp to avoid confusion.
Tidy up comments.
request could be deallocated before the top half had finished
issuing it. The problem seems only to happen with IDE drives
and vn devices, but theoretically it could happen with any
drive. This is the most important part of a possible series
of fixes designed to remove race conditions without locking
out interrupts for longer than absolutely necessary.
Reported-by: sos
Fix-supplied-by: dillon
(Much of this done by script)
Move B_ORDERED flag to b_ioflags and call it BIO_ORDERED.
Move b_pblkno and b_iodone_chain to struct bio while we transition, they
will be obsoleted once bio structs chain/stack.
Add bio_queue field for struct bio aware disksort.
Address a lot of stylistic issues brought up by bde.
set properly in the struct buf with vinum:
Fix locations where B_READ was cleared in the old code but
b.b_iocmd wasn't set to BIO_WRITE
Fix propogation of b_iocmd
Correct comments to reflect reality
Don't compare b_flags with BIO_READ, it's in b_iocmd.
Submitted by: Bernd Walter <ticso@cicely.de>
substitute BUF_WRITE(foo) for VOP_BWRITE(foo->b_vp, foo)
substitute BUF_STRATEGY(foo) for VOP_STRATEGY(foo->b_vp, foo)
This patch is machine generated except for the ccd.c and buf.h parts.
field in struct buf: b_iocmd. The b_iocmd is enforced to have
exactly one bit set.
B_WRITE was bogusly defined as zero giving rise to obvious coding
mistakes.
Also eliminate the redundant struct buf flag B_CALL, it can just
as efficiently be done by comparing b_iodone to NULL.
Should you get a panic or drop into the debugger, complaining about
"b_iocmd", don't continue. It is likely to write on your disk
where it should have been reading.
This change is a step in the direction towards a stackable BIO capability.
A lot of this patch were machine generated (Thanks to style(9) compliance!)
Vinum users: Greg has not had time to test this yet, be careful.
transferred, do it in complete_rqe instead.
launch_requests: Replace the inadvertently removed splbio() around the
main loop. It may not be necessary, but the biggest
test of this stuff are IDE disks, which I'm not
using.
Remove throttling code, I'm pretty sure it's not
needed any more.
Don't set B_ORDERED, it's not necessary either.
Objected-to-by: alfred
build_rq_buffer: Don't lose the B_ORDERED bit, it still has some
residual meaning. To do this right, Vinum needs to
look at the B_ORDERED bit and order the transfer
across all disks involved. That's an exercise for
another day.
Objected-to-by: alfred
Implicitly-sanctioned-by: jkh
VINUM_BDEV_MAJOR and VINUM_CDEV_MAJOR respectively.
Set DRIVE_MAXACTIVE and VINUM_MAXACTIVE to 30000, effectively
disabling the request limitation code. This code was added as an
attempt to escape from a bug which seems to have gone away, and it's
very likely I'll remove the code Real Soon Now, but I don't want to do
it just yet.
struct drive: Remove references to vnode pointers, including debug
output. Vinum now talks directly to the device driver. Instead, add
a dev_t.
enum plexorg: Add an instance for RAID-4.
Change checks for striped or RAID-5 plexes to a macro 'isstriped',
which now also includes RAID-4.
Change checks for RAID-5 plexes to a macro 'isparity', which now also
includes RAID-4.
Approved-by: jkh
set_sd_state: update the state of a subdisk in a multi-plex volume
more correctly.
update_plex_state: Bring the plex up correctly when the last subdisk
comes up.
checksdstate: Update comments.
vpstate: Don't return an "up" state on a degraded, unattached plex.
start_object: Return a sensible error message when trying to revive a
subdisk whose drive is down. Previously it returned EBUSY.
Approved-by: jkh
data corruption. It's a wonder it worked at all.
Led-on-the-right-path-by: dillon
revive_block: Add treatment for RAID-4.
Add function parityrebuild, called by revive_block and parityops.
Approved-by: jkh
the tsleep call flags.
Submitted-by: Bernd Walter <ticso@cicely.de>
Remove references to vnode pointers, including debug output. Vinum
now talks directly to the device driver.
bre: Add case for RAID-4.
sdio: Don't try to write to a down drive. Set the sd state instead.
Approved-by: jkh
vn_open. This is necessary in order to be able to open drives before
the root file system is mounted. This also involves restructuring the
drive struct, which no longer contains a vnode pointer. Instead,
open_drive sets an open flag. It's a horrible kludge, and I'll gladly
borrow a Danish axe and hack it in little pieces when devfs comes.
read_drive, write_drive, drive_io_done: Replace with driveio. The
function names are now macros.
driveio: Fix horrible, embarrassing breakage which was the reason why
read_drive and write_drive existed in the first place.
Code-torn-to-shreds-by: dillon
format_config: Don't save config of objects in referenced state. They
get rebuilt automatically.
Change checks for striped or RAID-5 plexes to a macro 'isstriped',
which now also includes RAID-4.
Change checks for RAID-5 plexes to a macro 'isparity', which now also
includes RAID-4.
Replace the preprocessor variable names BDEV_MAJOR and CDEV_MAJOR with
VINUM_BDEV_MAJOR and VINUM_CDEV_MAJOR respectively.
vinum_scandisk: Don't free memory twice on error, once is enough.
Approved-by: jkh
to RAID-5. peter claims that it might be faster for sequential
reading, since the drive caches don't trip over the parity blocks. I
have seen no evidence to support this, but it's a trivial change.
Requested-by: peter
Change checks for striped or RAID-5 plexes to a macro 'isstriped',
which now also includes RAID-4.
Change checks for RAID-5 plexes to a macro 'isparity', which now also
includes RAID-4.
atoi(): Remove, nobody was talking to it.
give_sd_to_drive: If no space is available, make the subdisk down,
don't delete it.
Change the manner in which the subdisk count was maintained to avoid
cases where the count was not adjusted correctly.
config_drive: Check if we have subdisks referencing us, and add them
if so. This fixes problems which arose when a drive is replaced in a
running system.
config_sd: Add support for a keyword 'partition', whose meaning will
be revealed in the fullness of time.
Cosmetic: Shorten some console messages.
Approved-by: jkh
to SI_SUB_VINUM, thus making it possible for Vinum to access I/O
devices and start.
Replace the preprocessor variable names BDEV_MAJOR and CDEV_MAJOR with
VINUM_BDEV_MAJOR and VINUM_CDEV_MAJOR respectively.
Style fixes: replace NULL with 0 where appropriate.
Submitted-by: Charlie Root <root@sms-1.follo.net> (yup, that's all I
have to go on).
Approved-by: jkh
on alpha.
Submitted-by: Bernd Walter <ticso@cicely.de>
struct sd: Add a field for the pid of the reviver when the subdisk is
reviving.
Replace block device macros with generalized device macros.
alpha.
Explicitly type large scalar parameters to avoid compilation warnings
on alpha.
Submitted-by: Bernd Walter <ticso@cicely.de>
Make better checks that the revive block size is valid, silently set
it to the defaults if not.
Replace block device macros with generalized device macros.
alpha.
Modify the manner in which we lock RAID-5 plexes. This appears to
solve some of the elusive panics we have seen with corrupted buffer
headers (specifically the zeroed-out b_iodone field).
Submitted-by: Bernd Walter <ticso@cicely.de>
solve some of the elusive panics we have seen with corrupted buffer
headers (specifically the zeroed-out b_iodone field).
Submitted-by: Bernd Walter <ticso@cicely.de>
