Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Merge checked by: Glen Barber (gjb@)

MFC of 247212:
When running with the -d option, instrument fsck_ffs to track the number,
data type, and running time of its I/O operations.

No functional changes.

MFC of 247234:
Catch up with internal API changes for initbarea() and getdatablk()
of fsck_ffs introduced with r247212.

Submitted by: David Wolfskill <david@catwhisker.org>

MFC of 248625:
Speed up fsck by caching the cylinder group maps in pass1 so
that they do not need to be read again in pass5. As this nearly
doubles the memory requirement for fsck, the cache is thrown away
if other memory needs in fsck would otherwise fail. Thus, the
memory footprint of fsck remains unchanged in memory constrained
environments.

This work was inspired by a paper presented at Usenix's FAST '13:
www.usenix.org/conference/fast13/ffsck-fast-file-system-checker

Details of this implementation appears in the April 2013 of ;login:
www.usenix.org/publications/login/april-2013-volume-38-number-2.
A copy of the April 2013 ;login: paper can also be downloaded
from: www.mckusick.com/publications/faster_fsck.pdf.

Reviewed by: kib
Tested by: Peter Holm

MFC of 248639:
Fix the build after addition of cylinder group cacheing (r248625)

Reported by: Glen Barber (gjb@)
Pointy hat to: Kirk McKusick (mckusick@)

MFC of 248673:
Minor formatting fix for printf() to fix clang builds.

Submitted by: db
Reviewed by: gjb

MFC of 248680:
Resolve clang compile errors on amd64/i386 for certain by casting.

compile tested with clang on i386, amd64
compile tested with gcc on i386, amd64, sparc64

Submitted by: delphij

MFC of 248691:
Note that output is in seconds, not msec.
KNF indentation.
No functional change.
No change to printf strings.
No change to casting of printf arguments.

Reported by: Bruce Evans

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Add some error messages suggested in PR bin/138043. The code to
correct the problem was added in r176575 by delphij on 2008-02-25.

PR: 138043
Reported by: Heikki Suonsivu

Update the actions previously attempted by the -D option to make them
robust. With these changes fsck is now able to detect and reliably
rebuild corrupted cylinder group maps. The -D option is no longer
necessary as it has been replaced by a prompt asking whether the
corrupted cylinder group should be rebuilt and doing so when requested.
These actions are only offered and taken when running fsck in manual
mode. Corrupted cylinder groups found during preen mode cause the fsck
to fail.

Add the -r option to free up excess unused inodes. Decreasing the
number of preallocated inodes reduces the running time of future
runs of fsck and frees up space that can allocated to files. The -r
option is ignored when running in preen mode.

Reviewed by: Xin LI <delphij@>
Sponsored by: Rsync.net

In pass1(), cap inosused to fs_ipg rather than allowing arbitrary
number read from cylinder group. Chances that we read a smarshed
cylinder group, and we can not 100% trust information it has
supplied. fsck_ffs(8) will crash otherwise for some cases.

Eliminate linked list used to track inodes with an initial link
count of zero and instead encode this information in the inode state.
Pass 4 performed a linear search of this list for each inode in
the file system, which performs poorly if the list is long.

Reviewed by: sam & keramida (an earlier version of the patch), mckusick
MFC after: 1 month

Create DIP_SET() and IBLK_SET() macros to fix lvalue warnings.

Inspired by: kan

Remove advertising clause from University of California Regent's license,
per letter dated July 22, 1999.

Approved by: core, imp

In the case of a background fsck, periodically update the process title
with a progress update.

Avoid dereferencing null pointers in fsck_ffs. (pfatal may return,
so it isn't a safe way of handling [mc]alloc failures.)

PR: misc/61800
Approved by: rwatson (mentor)

Use __FBSDID() to quiet GCC 3.3 warnings.

Use the standardized CHAR_BIT constant instead of NBBY in userland.

Add support to fsck_ffs to account for storage for extended
attributes.

Sponsored by: DARPA & NAI Labs.

Add a source file where EXTATTR checks will happen and hook it in even
if it doesn't do anything yet.

Sponsored by: DARPA & NAI Labs.

s/filesystem/file system/g as discussed on -developers

Fix a bunch of format string warnings which broke
the sparc64 build.

Tested on: sparc64, i386

Warning cleanup.

Format changes by peter

Remove the kernel file-size limit for UFS2, so that only the limit
imposed by the filesystem structure itself remains. With 16k blocks,
the maximum file size is now just over 128TB.

For now, the UFS1 file size limit is left unchanged so as to remain
consistent with RELENG_4, but it too could be removed in the future.

Reviewed by: mckusick

Fix an integer overflow that causes fsck_ffs to crash when it
encounters very large file sizes in the filesystem.

Reviewed by: mckusick

This commit adds basic support for the UFS2 filesystem. The UFS2
filesystem expands the inode to 256 bytes to make space for 64-bit
block pointers. It also adds a file-creation time field, an ability
to use jumbo blocks per inode to allow extent like pointer density,
and space for extended attributes (up to twice the filesystem block
size worth of attributes, e.g., on a 16K filesystem, there is space
for 32K of attributes). UFS2 fully supports and runs existing UFS1
filesystems. New filesystems built using newfs can be built in either
UFS1 or UFS2 format using the -O option. In this commit UFS1 is
the default format, so if you want to build UFS2 format filesystems,
you must specify -O 2. This default will be changed to UFS2 when
UFS2 proves itself to be stable. In this commit the boot code for
reading UFS2 filesystems is not compiled (see /sys/boot/common/ufsread.c)
as there is insufficient space in the boot block. Once the size of the
boot block is increased, this code can be defined.

Things to note: the definition of SBSIZE has changed to SBLOCKSIZE.
The header file <ufs/ufs/dinode.h> must be included before
<ufs/ffs/fs.h> so as to get the definitions of ufs2_daddr_t and
ufs_lbn_t.

Still TODO:
Verify that the first level bootstraps work for all the architectures.
Convert the utility ffsinfo to understand UFS2 and test growfs.
Add support for the extended attribute storage. Update soft updates
to ensure integrity of extended attribute storage. Switch the
current extended attribute interfaces to use the extended attribute
storage. Add the extent like functionality (framework is there,
but is currently never used).

Sponsored by: DARPA & NAI Labs.
Reviewed by: Poul-Henning Kamp <phk@freebsd.org>

more file system > filesystem

UFS2 preparation commit:
Remove support for converting old FFS formats to newer.

Submitted by: mckusick
Sponspored by: DARPA & NAI Labs.

o __P removed
o ansi function prototypes
o unifdef -D__STDC__
o __dead2 on usage prototype
o remove now-bogus main prototype

Remove 'register' keyword.
It does not help modern compilers, and some may take some hit from it.
(I also found several functions that listed *every* of its 10 local vars with
"register" -- just how many free registers do people think machines have?)

Fix a large number of -Wall, -Wformat and -W compiler warnings.
These were mainly missing casts or wrong format strings in printf
statements, but there were also missing includes, unused variables,
functions and arguments.

The choice of `long' vs `int' still seems almost random in a lot
of places though.

Additions to run checks on live filesystems. This change will not
affect current systems until fsck is modified to use these new
facilities. To try out this change, set the fsck passno to zero
in /etc/fstab to cause the filesystem to be mounted without running
fsck, then run `fsck_ffs -p -B <filesystem>' after the system has
been brought up multiuser to run a background cleanup on <filesystem>.
Note that the <filesystem> in question must have soft updates enabled.

Don't allow special devices of type NODEV (NOUDEV as seen from kernel).
They can't be created via mknod and the kernel crashes if it encounters
such an inode.
Approved by: mckusick

Fsck_ffs did not properly range-check the inode 'di_size'
field, so it was possible for a filesystem marked clean by fsck_ffs
to cause kernel crashes later when mounted. This could occur when
fsck_ffs was used to repair a badly corrupted filesystem.

As pointed out by bde, it is not sufficient to restrict di_size to
just the superblock fs_maxfilesize limit. The use of 32-bit logical
block numbers (both in fsck and the kernel) induces another file
size limit which is usually lower than fs_maxfilesize. Also, the
old 4.3BSD filesystem does not have fs_maxfilesize initialised.

Following this change, fsck_ffs will enforce exactly the same
file size limits as are used by the kernel.

PR: kern/15065
Discussed with: bde
Reviewed by: bde, mckusick

Add a simple SIGINFO handler to fsck_ffs. Shortly after receipt of
a SIGINFO (normally via Ctrl-T), a line will be output indicating
the current phase number and progress information relevant to the
current phase.

Approved by: mckusick

added growfs(8) including ffsinfo(8) to the freebsd base system

Reviewed by: grog

Ensure that block and character devices as well as fifo's and sockets
all have zero length. A non-zero length panic's the kernel when one
of these is deleted.

PR: 19426
Submitted by: Ian Dowse <iedowse@maths.tcd.ie>
Reviewed by: dwmalone@FreeBSD.org

Teach fsck about snapshot files. These changes should have no
effect on operation of fsck on filesystems without snapshots.
If you get compilation errors, be sure that you have copies of
/usr/include/sys/mount.h (1.94), /usr/include/sys/stat.h (1.21),
and /usr/include/ufs/ffs/fs.h (1.16) as of July 4, 2000 or later.

$Id$ -> $FreeBSD$

Cosmetic and documentation changes brought from earlier FreeBSD versions.
(e.g. RCS Id:)

Reviewed by: Don Lewis <Don.Lewis@tsc.tdk.com>
Submitted by: Kirk McKusick <mckusick@McKusick.COM>
Obtained from: Mckusick, BSDI and a host of others

This exactly matches Kirks sources imported under the
Tag MCKUSICK2. These are as supplied by kirk with one small
change needed to compile under freeBSD.

Some FreeBSD patches will be added back, though many have been
added to Kirk's sources already.

Restored rev.1.11, which I somehow clobbered in rev.1.12.

Fixed printf format errors.

Correct use of .Nm. Add rcsid. Remove unused #includes. Use err(3).

Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman)
Submitted by: Kirk McKusick (mcKusick@mckusick.com)
Obtained from: WHistle development tree

Restore check for ridiculous directory sizes.

Finished (?) merging with Lite2: cleaned up #include mess.

Fixed style bugs in FreeBSD changes.

Merge from Lite2. Note that Lite2 has it's own filesystem clean check
skipping code that overrides ours sooner. One should be eliminated,
but for now it works.

Remove trailing whitespace.

Submitted by: phk, added to by bde

Fix all the warnings from `gcc -Wall'.

Woops, last patch was by Wolfgang Solfrank.

Two fixes from the NetBSD group (Charles Hannum):

1) dir.c: get byte order right in mkentry()
2) pass1.c: When doing -c2 conversion, do secsize reads for a symlink -
not doing so was causing the conversion to fail because the device
driver can't deal with short reads.

Fixed so that it can grok old style "fastlinks".

BSD 4.4 Lite sbin Sources

Note: XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.