CVS log for src/sys/lib/libsa/ffsv1.c

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Restore backward compatibility of UFS2 with previous NetBSD releases by
disabling support in UFS2 for extended attributes (including ACLs).
Add a new variant of UFS2 called "UFS2ea" that does support extended attributes.
Add new	fsck_ffs operations "-c	ea" and	"-c no-ea" to convert file systems
from UFS2 to UFS2ea and	vice-versa (both of which delete all existing extended
attributes in the process).

Don't load filessytem module for filesystem that was found but isn't used
for booting.

Sync w/ HEAD.

sync with head

add bi-endian support to the libsa ufs reader and enable it in efiboot.

ffs frontends to "ufs.c" now also define ufs_dinode_swap, ufs_indp_swap,
and FS_MAGIC (moved from ufs.c #if segments.)  these are used to call
the right (32/64 bit) ffsv1/v2 version.

ufs.c 'struct file' gains f_swapped member.  accessors for d_magic,
d_reclen, and d_ino are introduced (they need to be swapped.)  sfter
reading an inode from disk, read_inode() may call ufs_dinode_swap().
indirect block number and caches may be swapped.

error handling in ffs_find_superblock() is cleaned up.  (size is slightly
reduced on some ports with this part.)

defaults for new defines added to ufs.c.  (XXX: we build ufs.c but i think
all the consumers don't use it, and we can stop building it.)

LFS support is not included.

add a cut-down copy of ffs_bswap.c from the kernel.

also enable bi-endian disklabel support in efiboot.

most ports build and sizes compared for platforms that don't enable this
code and all but one saw reduced code size.  booted several platforms with
new boot code.

Mostly merge changes from HEAD upto 20200411

Now that the ufs module has been split out from ffs and ext2fs, we need
to update the boot-loader to push all modules required to support the
booted filesystem.  We treat the fsmod string as a slash-separated list
of module names (relative to kern.module.path), rather than as a single
module path name.

Note that ffsv1 and ffsv2 are still exempted from the boot-loader's
auto-push, but the list of required filesystems is still noted in the
source.

Also note that arch/sandpoint needs a similar change.  I have not made
this change because I am totally unable to test it.

Tested on my kernel with _no_ built-in file-systems and with the ffs
bootloader settings of fsmod enabled.

Pull up revisions:
  src/sys/arch/i386/stand/lib/exec.c revision 1.50
  src/sys/arch/sandpoint/stand/altboot/main.c revision 1.21 via patch
  src/sys/lib/libsa/ext2fs.c revision 1.13
  src/sys/lib/libsa/ffsv1.c revision 1.6
  src/sys/lib/libsa/ffsv2.c revision 1.6
  src/sys/lib/libsa/globals.c revision 1.9
  src/sys/lib/libsa/lfsv1.c revision 1.5
  src/sys/lib/libsa/lfsv2.c revision 1.5
  src/sys/lib/libsa/stand.h revision 1.76
  src/sys/lib/libsa/ufs.c revision 1.58
(requested by dsl in ticket #279).

Remove the code that tries to load the "ffs" kernel module during boot.
This is in line with the core decision than even modular kernels should
  contain the ffs code.
I've left in the code that tries to load "nfs" and "ext2fs", but it
  isn't clear that is necessary.
Removes a warning message that (usually) flashes past to fast to read.
AFAICT all the relevant kernels contain ffs (and nfs for that matter).

sync to latest -current.

sync with head.

Remove the code that tries to load the "ffs" kernel module during boot.
This is in line with the core decision than even modular kernels should
  contain the ffs code.
I've left in the code that tries to load "nfs" and "ext2fs", but it
  isn't clear that is necessary.
Removes a warning message that (usually) flashes past to fast to read.
AFAICT all the relevant kernels contain ffs (and nfs for that matter).

sync with head

merge to -current.

Apply the following patch submitted by Evgeniy Ivanov:
http://mail-index.NetBSD.org/tech-kern/2011/12/15/msg012226.html
http://mail-index.NetBSD.org/tech-kern/2011/12/17/msg012229.html

 - add 'ls' op to struct fs_ops to support ls command on each fs,
   enabled by -DLIBSA_ENABLE_LS_OP and SAMISCMAKEFLAGS+="SA_ENABLE_LS_OP=yes"
   in libsa
 - split sys/lib/libsa/ufs_ls.c into UFS specific part and MI part (ls.c)
   that opens the target fs and calls fs-depedent XXX_ls() functions
 - add a ls op for ext2fs
   (all other fs than ufs and ext2fs don't have actual ls ops yet)
 - replace existing MD ufs_ls() calls with this new MI ls()

The original patch was written for i386 and ext2fs.
zaurus zboot has been tested by nonaka@.
ews4800mips and x68k loaders have been tested by me (with several fixes).
landisk might be okay since it was almost copied from i386.

XXX1: "ls" op in fs_ops looks a bit inconsistent, but we will be able to
      replace it with real fs ops like readdir if it's really worth
XXX2: someone might have to check sys/arch/ia64/stand/efi/libefi/efifs_ls.c

sync with head.

Sync with HEAD.

Sync with HEAD.

Update haad-dm branch to haad-dm-base2.

For the x86 boot loader, autoload a kernel module corresponding to the
root file system type.

merge ktrace-lwp.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Fix signed/unsigned warnings.

Files to build ffsv1 and ffsv2 versions of ufs.c