- MFC from head@196987

Simplify g_disk_ident_adjust() function and allow any printable character
in serial number.

Discussed with: trasz
Obtained from: Wheel Sp. z o.o. (http://www.wheel.pl)

Revert r190676,190677

The geom and CAM changes for root_hold are the wrong solution for USB design
quirks.

Requested by: scottl

Add interleaving root hold tokens from the CAM probe to disk_create and geom
provider tasting. This is needed for disk attachments that happen after threads
are running in the boot process.

Tested b

Add interleaving root hold tokens from the CAM probe to disk_create and geom
provider tasting. This is needed for disk attachments that happen after threads
are running in the boot process.

Tested by: rnoland

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Revert r184136. Instead, push the check for crashdumpmap overflow into the
MD i386 and amd64 dump code.

Requested by: jhb
Retested by: pho
MFC after: 3 days (+ 176304 + 184136)

Do not overflow crashdumpmap.

Reported and tested by: pho
Reviewed by: jhb
MFC after: 1 week

Add sbuf_new_auto as a shortcut for the very common case of creating a
completely dynamic sbuf.

Obtained from: Varnish
MFC after: 2 weeks

Teach the dump and minidump code to respect the maxioszie attribute of
the disk; the hard-coded assumption of 64K doesn't work in all cases.

Allow to use ':' in d_ident, which is quite handy character.

Because there are many strange hardware out there, allow to use only
[a-zA-Z0-9-_@#%.] characters in d_ident field.

- Extend disk structure to allow to store disk's serial number, which can be
retrieved via GEOM::ident attribute.
- Bump disk(9) ABI version.

OK'ed by: phk

Reduce the noise when plugging in (USB) mass storage devices, like a 4 port
flash card reader.
Also remove an 'Opened da0 -> <random number>' which is not needed on a daily
basis (available through b

Reduce the noise when plugging in (USB) mass storage devices, like a 4 port
flash card reader.
Also remove an 'Opened da0 -> <random number>' which is not needed on a daily
basis (available through bootverbose).

Reviewed by: phk, ken
MFC after: 1 week

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Add a new disk flag - DISKFLAG_CANFLUSHCACHE, which indicates that the disk
can handle BIO_FLUSH requests.

Sponsored by: home.pl

Add g_wither_provider() to abstract the details of destroying a
particular provider. Use this function where g_orphan_provider()
is being called so that the flags are updated correctly and
g_orphan_p

Add g_wither_provider() to abstract the details of destroying a
particular provider. Use this function where g_orphan_provider()
is being called so that the flags are updated correctly and
g_orphan_provider() is called only when allowed.

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Fix a bug that caused some /dev entries to continue to exist after
the underlying drive had been hot-unplugged from the system. Here
is a specific example. Filesystem code had opened /dev/da1s1e.
S

Fix a bug that caused some /dev entries to continue to exist after
the underlying drive had been hot-unplugged from the system. Here
is a specific example. Filesystem code had opened /dev/da1s1e.
Subsequently, the drive was hot-unplugged. This (correctly) caused
all of the associated /dev/da1* entries to be deleted. When the
filesystem later realized that the drive was gone it closed the
device, reducing the write-access counts to 0 on the geom providers
for da1s1e, da1s1, and da1. This caused geom to re-taste the
providers, resulting in the devices being created again. When the
drive was hot-plugged back in, it resulted in duplicate /dev entries
for da1s1e, da1s1, and da1.

This fix adds a new disk_gone() function which is called by CAM when a
drive goes away. It orphans all of the providers associated with the
drive, setting an error condition of ENXIO in each one. In addition,
we prevent a re-taste on last close for writing if an error condition
has been set in the provider.

Sponsored by: Isilon Systems
Reviewed by: phk
MFC after: 1 week

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Move some devstat collection to below where large IO operations are chopped
up. This make iostat report operations passed down to the device driver
instead of operations passed down to GEOM disk. T

Move some devstat collection to below where large IO operations are chopped
up. This make iostat report operations passed down to the device driver
instead of operations passed down to GEOM disk. The transfer size limit
imposed by the device driver is no longer hidden, improving the correlation
between iostat output and device driver workload.

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After rejecting the bio request early, return instead of panicing.

Found by: Coverity (ID#450)

Make various random things static

When dumping to a unpartitioned disk, make sure to chop the
length of the dump area accordingly.

Run into by: scottl

CAM will sometimes remove a disk again even before it finished being
initialized. We already cancel the pending events but we need to not
dereference the geom pointer which never got set different f

CAM will sometimes remove a disk again even before it finished being
initialized. We already cancel the pending events but we need to not
dereference the geom pointer which never got set different from NULL.

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Pass the file->flags down to geom ioctl handlers.

Reject certain ioctls if write permission is not indicated.

Bump geom API version.

Reported by: Ruben de Groot <mail25@bzerk.org>

Tag all geom classes in the tree with a version number.

Use default method initialization on geoms.

Fix regression in last commit.

Make sure to kill the devstat entry for disappearing disks.

PR: 68074
Submitted by: Hendrik Scholz <hscholz@raisdorf.net>