write is a disk write request that tells the disk that the buffer
being written must be committed to the media along with any writes
that preceeded it before any future blocks may be written to the drive.
Barrier writes are provided by adding the functions bbarrierwrite
(bwrite with barrier) and babarrierwrite (bawrite with barrier).
Following a bbarrierwrite the client knows that the requested buffer
is on the media. It does not ensure that buffers written before that
buffer are on the media. It only ensure that buffers written before
that buffer will get to the media before any buffers written after
that buffer. A flush command must be sent to the disk to ensure that
all earlier written buffers are on the media.
Reviewed by: kib
Tested by: Peter Holm
as clean on shutdown and move that action from shutdown_pre_sync stage to
shutdown_post_sync to avoid extra flapping.
ZFS tends to not close devices on shutdown, that doesn't allow GEOM RAID
to shutdown gracefully. To handle that, mark volume as clean just when
shutdown time comes and there are no active writes.
MFC after: 2 weeks
as clean on shutdown and move that action from shutdown_pre_sync stage to
shutdown_post_sync to avoid extra flapping.
ZFS tends to not close devices on shutdown, that doesn't allow GEOM RAID
to shutdown gracefully. To handle that, mark volume as clean just when
shutdown time comes and there are no active writes.
PR: kern/113957
MFC after: 2 weeks
unsupported metadata types like Intel Smart Response to not corrupt them.
- Improve setting of these things during metadata writing to protect from
incapable BIOS'es and other implementations.
disks should be rebuilt. Our rebuild code is same time disk-centric. To
handle this situation properly check all disks for RBLD flags, and if no
disk specified try rebuild/resync all of them except newly inserted.
Windows driver uses such migration when it creates new arrays. While GEOM
RAID has no mechanism to implement migration in general case, this specifc
case still can be handled easily via degraded RAID1 creation followed by
regular rebuild.
It is alike to RAID1, but with dedicating master and recovery disks and
providing manual control over synchronization. It allows to use recovery
disk as snapshot of the master disk from the time of the last sync.
This implementation is not functionaly complete comparing to Windows,
but it is better then silent conversion to RAID1 on first boot.
'"'. Mangling is only done for label names read from file system
metadata. Encoding resembles URL encoding. For example, the space
character becomes %20.
Help by: kib
Discussed with: imp, kib, pjd
extended using growfs(8). The problem here is that geom_label checks if
the filesystem size recorded in UFS superblock is equal to the provider
(i.e. device) size. This check cannot be removed due to backward
compatibility. On the other hand, in most cases growfs(8) cannot set
fs_size in the superblock to match the provider size, because, differently
from newfs(8), it cannot recompute cylinder group sizes.
To fix this problem, add another superblock field, fs_providersize, used
only for this purpose. The geom_label(4) will attach if either fs_size
(filesystem created with newfs(8)) or fs_providersize (filesystem expanded
using growfs(8)) matches the device size.
PR: kern/165962
Reviewed by: mckusick
Sponsored by: FreeBSD Foundation
Alike to BIO_WRITE, report success if at least one subdisk succeeded with
BIO_DELETE. But unlike BIO_WRITE don't fail disk on BIO_DELETE error.
Sponsored by: iXsystems, Inc.
MFC after: 1 month
If at least one subdisk in the volume supports it, BIO_DELETE requests
will be propagated down. Unfortunatelly, for RAID levels with redundancy
unmapped blocks will be mapped back during first rebuild/resync process.
Sponsored by: iXsystems, Inc.
MFC after: 1 month
and move that action from shutdown_pre_sync to shutdown_post_sync stage
to avoid extra flapping.
ZFS tends to not close devices on shutdown, that doesn't allow GEOM RAID
to shutdown gracefully. To handle that, mark volume as clean just when
shutdown time comes and there are no active writes.
MFC after: 2 weeks
In particular, do not lock Giant conditionally when calling into the
filesystem module, remove the VFS_LOCK_GIANT() and related
macros. Stop handling buffers belonging to non-mpsafe filesystems.
The VFS_VERSION is bumped to indicate the interface change which does
not result in the interface signatures changes.
Conducted and reviewed by: attilio
Tested by: pho
GIANT from VFS. This code is particulary broken and fragile and other
in-kernel implementations around, found in other operating systems,
don't really seem clean and solid enough to be imported at all.
If someone wants to reconsider in-kernel NTFS implementation for
inclusion again, a fair effort for completely fixing and cleaning it
up is expected.
In the while NTFS regular users can use FUSE interface and ntfs-3g
port to work with their NTFS partitions.
This is not targeted for MFC.
provider name to be specified instead of geom name (first argument in all
subcommands except label). In most cases there is only one array used
any way, so it is not really useful to make user type ugly geom names like
Intel-f0bdf223 or SiI-732c2b9448cf. Though they can be used in some cases.
Sponsored by: iXsystems, Inc.
MFC after: 1 month
mutexes held and the topology lock is an sx lock.
The topology lock was there to protect traversing through the list of providers
of disk's geom, but it seems that disk's geom has always exactly one provider.
Change the code to call g_wither_provider() for this one provider, which is
safe to do without holding the topology lock and assert that there is indeed
only one provider.
Discussed with: ken
MFC after: 1 week
It is possible that provider is destroyed while we are iterating over the
list.
Reported by: Brian Parkison <parkison@panzura.com>
Discussed with: phk
MFC after: 1 week
bytes syncronized.
The rationale behind this is the following: for large disks the
percent synchronisation counter ticks too seldom, and monitoring
software (as well as human operator) can't tell whether
synchronisation goes on or one of disks got stuck. On an idle
server one can look into gstat and see whether synchronisation goes
on or not, but on a busy server that won't work. Also, new value
monitored can be differentiated obtaining the synchronisation speed
quite precisely.
Submitted by: Konstantin Kukushkin <dark ramtel.ru>
Reviewed by: pjd
If GELI provider was created on FreeBSD HEAD r238116 or later (but before this
change), it is using very weak keys and the data is not protected.
The bug was introduced on 4th July 2012.
One can verify if its provider was created with weak keys by running:
# geli dump <provider> | grep version
If the version is 7 and the system didn't include this fix when provider was
initialized, then the data has to be backed up, underlying provider overwritten
with random data, system upgraded and provider recreated.
Reported by: Fabian Keil <fk@fabiankeil.de>
Tested by: Fabian Keil <fk@fabiankeil.de>
Discussed with: so
MFC after: 3 days
This fixes "Negative sc_ref" panic possible when sysctl_kern_geom_confxml()
is run simultaneously with destroying GATE device.
Reviewed by: pjd
MFC after: 3 days
This change triggered interesting foot shooting condition in GEOM when
RW access to root partition by fsck spoils VFS geom there, which has it
opened RO at the same time. Seems spoiling concept needs some rework.
It includes three parts:
1) Modifications to CAM to detect media media changes and report them to
disk(9) layer. For modern SATA (and potentially UAS) devices it utilizes
Asynchronous Notification mechanism to receive events from hardware.
Active polling with TEST UNIT READY commands with 3 seconds period is used
for incapable hardware. After that both CD and DA drivers work the same way,
detecting two conditions: "NOT READY: Medium not present" after medium was
detected previously, and "UNIT ATTENTION: Not ready to ready change, medium
may have changed". First one reported to disk(9) as media removal, second
as media insert/change. To reliably receive second event new
AC_UNIT_ATTENTION async added to make UAs broadcasted to all periphs by
generic error handling code in cam_periph_error().
2) Modifications to GEOM core to handle media remove and change events.
Media removal handled by spoiling all consumers attached to the provider.
Media change event also schedules provider retaste after spoiling to probe
new media. New flag G_CF_ORPHAN was added to consumers to reflect that
consumer is in process of destruction. It allows retaste to create new
geom instance of the same class, while previous one is still dying.
3) Modifications to some GEOM classes: DEV -- to report media change
events to devd; VFS -- to handle spoiling same as orphan to prevent
accessing replaced media. PART class already handles spoiling alike to
orphan.
Reviewed by: silence on geom@ and scsi@
Tested by: avg
Sponsored by: iXsystems, Inc. / PC-BSD
MFC after: 2 months
