Add a how argument to root_mount_hold() so it can be passed NOWAIT and be called
in situations where sleeping isnt allowed.

Be more explicit and complain if kernel dumps are perfomed on unsupported
partition types. This is to help users used to the old behaviour.

Reviewed by: marcel
Approved by: gnn (mentor)

Make GEOM provider names starting with "/dev/" acceptable as well as their
"raw" names. While there, change the formatting of extended MSDOS partitions
so that the dot (".") is not used to separate t

Make GEOM provider names starting with "/dev/" acceptable as well as their
"raw" names. While there, change the formatting of extended MSDOS partitions
so that the dot (".") is not used to separate two numbers (which kind of
looks like the whole is a decimal number). Use "+" instead, which also
hints that the second part of the name is the offset from the start of
the partition in the first part of the name. Also change the offset from
decimal to hexadecimal notation, simply for aesthetic reasons and future
compatibility.

GEOM_PART is the default in 8-CURRENT but not yet in 7-STABLE so this
changeset can be MFC-ed without causing major problems from the second
part.

Reviewed by: marcel
Approved by: gnn (mentor)
MFC after: 2 weeks

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Update the projects tree to a newer FreeBSD current.

Provide compatibility symlink for logical partitions:
1. Extend geom_dev by having it create the symlink (i.e. call
make_dev_alias) based on the DIOCGPROVIDERALIAS ioctl.
In this way the fun

Provide compatibility symlink for logical partitions:
1. Extend geom_dev by having it create the symlink (i.e. call
make_dev_alias) based on the DIOCGPROVIDERALIAS ioctl.
In this way the functionaility is generic and thus usable
by any geom/provider.
2. Have g_part handle said ioctl through the devalias method,
so that it's under control of the scheme itself. By design
the alias will not be created for newly added partitions.

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Remove gpt_offset and related code. It was introduced for use
by the BSD scheme, ended up not to be needed. Remove to avoid
abuse and to keep the bloat to a minimum.

Add method precheck to the g_part interface. The precheck
method allows schemes to reject the ctl request, pre-check
the parameters and/or modify/set parameters. There are 2
use cases that triggered

Add method precheck to the g_part interface. The precheck
method allows schemes to reject the ctl request, pre-check
the parameters and/or modify/set parameters. There are 2
use cases that triggered the addition:
1. When implementing a R/O scheme, deletes will still
happen to the in-memory representation. The scheme is
not involved in that operation. The pre-check method
can be used to fail the delete up-front. Without this
the write to disk will typically fail, but at that
time the delete already happened.
2. The EBR scheme uses a linked list to record slices.
There's no index. The EBR scheme defines the index
as a function of the start LBA of the partition. The
add verb picks an index for the range and then invokes
the add method of the scheme to fill in the blanks. It
is too late for the add method to change the index.
The pre-check is used to set the index up-front. This
also (silently) overrides/nullifies any (pointless)
user-specified index value.

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Allow gpe_offset to be set by the scheme. When gpe_offset is zero,
or invalid, initialize it to the start of the partition. Adjust
the mediasize when the offset lies somewhere inside the partition.

o Add the "PART::scheme" attribute that returns the name of the
underlying partitioning scheme.
o Put the start and end of the partition in the XML configuration.
The start and end are the LB

o Add the "PART::scheme" attribute that returns the name of the
underlying partitioning scheme.
o Put the start and end of the partition in the XML configuration.
The start and end are the LBAs of the first and last sector
(resp.) of the partition. They are currently identical to the
offset and size attributes, which describe the partition as an
offset and size in bytes, but may not in the future. The start
and end will be used for the logical partition boundaries and
may include metadata. The offset and size will always represent
the useful storage space within the partition. Typically these
two notions are the same, but for logical partitions in an
extended partition, the EBR is more naturally treated as being
part of the partition.

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Don't enforce an upper-bound to the number of sectors or heads
that that the provider has. The limits we imposed were PC BIOS
specific and not always applicable.

Allow boot code to be smaller than what the scheme expects.
This effectively changes the boot code size to be an upper
bound and makes the interface more flexible.

Insert the null scheme at the head. This does not change any
functionality, but creates an invariant: the first element
on the list is always the null scheme.

Hold the root mount while we're tasting. It is possible
that a nested partition (typically the BSD disklabel)
is not done tasting while the root file system is being
mounted. While this is rare, it's

Hold the root mount while we're tasting. It is possible
that a nested partition (typically the BSD disklabel)
is not done tasting while the root file system is being
mounted. While this is rare, it's still possible.

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Fix build.

Keep entries sorted.

Include the vendor in the partition name.

Detect Apple HFS GPT slices.

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

Add the set and unset verbs used to set and clear attributes for
partition entries. Implement the setunset method for the MBR
scheme to control the active flag.

Implement the G_PART_DUMPCONF method for all 6 schemes. Also call
the method for the (indent == NULL) case (i.e. the kern.geom.conftxt
sysctl). The purpose is to extend the conftxt output with scheme

Implement the G_PART_DUMPCONF method for all 6 schemes. Also call
the method for the (indent == NULL) case (i.e. the kern.geom.conftxt
sysctl). The purpose is to extend the conftxt output with scheme-
specific fields which can be used by libdisk. In particular, have
the schemes dump the xs and xt fields, which contain the backward
compatible values for class type and partition type. This allows
libdisk to work with the legacy slicers as well as with gpart and
helps/promotes migration.

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Add the bootcode verb for installing boot code. Boot code
is supported for the MBR, GPT and PC98 schemes, where GPT
installs boot code into the PMBR.

Redefine G_PART_SCHEME_DECLARE() from populating a private linker set
to declaring a proper module. The module event handler is part of the
gpart core and will add the scheme to an internal list on m

Redefine G_PART_SCHEME_DECLARE() from populating a private linker set
to declaring a proper module. The module event handler is part of the
gpart core and will add the scheme to an internal list on module load
and will remove the scheme from the internal list on module unload.
This makes it possible to dynamically load and unload partitioning
schemes.

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Fix a bug in the add verb, where we failed to keep the list
of partitions in index-order. This is assumed by the APM, MBR
and BSD partitioning schemes.

Internal partitions can not be deleted or modified.

Skip internal partitions in the check for (user) partitions for
the destroy command. Previously a freshly created BSD disklabel
could not be destroyed because of the internal partition.