Fix typo in previous d282baddb0b02, breaking DTrace.

Add interface NVME to devstat

This allows to list only NVMe devices in systat, iostat, vmstat, etc.
Previously those were counted as OTHER.

Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Updates and enhancements to io.d to aid DTrace scripting

+ Add dev_type do devinfo_t
+ Add b_cmd to bufinfo_t
+ Add constants for BIO_* and DEVSTAT_TYPE_*
+ Add inline for converting BIO_* int to st

Updates and enhancements to io.d to aid DTrace scripting

+ Add dev_type do devinfo_t
+ Add b_cmd to bufinfo_t
+ Add constants for BIO_* and DEVSTAT_TYPE_*
+ Add inline for converting BIO_* int to string
+ Add inline for converting DEVSTAT_TYPE_* int to string
+ Add mask for dev_type & DEVSTAT_TYPE_MASK to string
+ Add mask for dev_type & DEVSTAT_TYPE_IF_MASK to string

Reviewed by: markj
Sponsored by: Smule, Inc.
Differential Revision: https://reviews.freebsd.org/D14396

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Use tabs in io.d, fix alignment issues, remove extraneous newlines

Merge from head

Sponsored by: Gandi.net

Finish merging from head, messed up in previous attempt

Catch up with head, primarily for the 1.14.4.0 firmware.

Merge ^/head r285924 through r286421.

- Use an explicit "depends_on module kernel" guard in DTrace libraries that
reference types defined in the kernel. Otherwise dtrace(1) expects to find
CTF definitions for all referenced types, wh

- Use an explicit "depends_on module kernel" guard in DTrace libraries that
reference types defined in the kernel. Otherwise dtrace(1) expects to find
CTF definitions for all referenced types, which is not very reasonable
when it is being used in a build environment. This was previously worked
around by adding "-x nolibs" to dtrace -h or -G invocations, but as of
r283025, dtrace(1) actually handles dependencies properly, so this is no
longer necessary.
- Remove "pragma ident" directives from DTrace libraries, as they're being
phased out upstream as well.

Submitted by: Krister Johansen <Krister.Johansen@isilon.com> [1]
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division

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Revert previous change in favor of a fix to the actual dtrace
libraries that addresses a #pragma issue.

Remove dependency code that caused a double inclusion.

Pointed out by: rpaulo and others

Sync from head

Merge head r236710 through r238467.

IFC @238412.

IFC @ r238370

Initial commit of an I/O provider for DTrace on FreeBSD.

These probes are most useful when looking into the structures
they provide, which are listed in io.d. For example:

dtrace -n 'io:genunix::s

Initial commit of an I/O provider for DTrace on FreeBSD.

These probes are most useful when looking into the structures
they provide, which are listed in io.d. For example:

dtrace -n 'io:genunix::start { printf("%d\n", args[0]->bio_bcount); }'

Note that the I/O systems in FreeBSD and Solaris/Illumos are sufficiently
different that there is not a 1:1 mapping from scripts that work
with one to the other.
MFC after: 1 month

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Merge head r233826 through r236710.

Add DTrace's io.d, which handles tranlsations for file, buffer and
device info structures as well as the fds[] array. This is a raw
version of the file, unmodified, to be used as a baseline.