Commit Graph

12 Commits

Author SHA1 Message Date
mckusick
9251693096 Create a new 32-bit fs_flags word in the superblock. Add code to move
the old 8-bit fs_old_flags to the new location the first time that the
filesystem is mounted by a new kernel. One of the unused flags in
fs_old_flags is used to indicate that the flags have been moved.
Leave the fs_old_flags word intact so that it will work properly if
used on an old kernel.

Change the fs_sblockloc superblock location field to be in units
of bytes instead of in units of filesystem fragments. The old units
did not work properly when the fragment size exceeeded the superblock
size (8192). Update old fs_sblockloc values at the same time that
the flags are moved.

Suggested by:	BOUWSMA Barry <freebsd-misuser@netscum.dyndns.dk>
Sponsored by:   DARPA & NAI Labs.
2002-11-27 02:18:58 +00:00
trhodes
136be46680 s/filesystem/file system/g as discussed on -developers 2002-08-21 18:11:48 +00:00
mckusick
88d85c15ef 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>
2002-06-21 06:18:05 +00:00
imp
611240d8bc o __P removal.
o ansi function definitions.
o main prototype removal
o unifdef __STDC__
2002-03-21 13:10:52 +00:00
asmodai
3022b1ea3d Remove unused include. 2000-05-01 20:20:05 +00:00
peter
76f0c923fe $Id$ -> $FreeBSD$ 1999-08-28 00:22:10 +00:00
charnier
7bb53ac8a4 Do not dot terminate SEE ALSO list. Add rcsid, remove unused #includes. Err(3)
messages should start with a lowercase letter.
1998-06-30 06:18:44 +00:00
ache
1b5fc58b0b Remove srandomdev fallback 1997-06-14 00:17:53 +00:00
charnier
5cfc21982c Add Id. Staticize usage function. Typo in usage string. 1997-06-11 07:18:18 +00:00
guido
4763d0a981 Get rid of __progname. I thought I already did that... 1997-03-26 19:07:54 +00:00
ache
cf3de83d91 Include missing <time.h>
Add missing RNG initialization
Use srandomdev() for RNG initialization
1997-03-24 15:51:11 +00:00
guido
c337c37259 Add generation number randomization. Newly created filesystems wil now
automatically have random generation numbers. The kenel way of handling those
also changed. Further it is advised to run fsirand on all your nfs exported
filesystems. the code is mostly copied from OpenBSD, with the randomization
chanegd to use /dev/urandom
Reviewed by:	Garrett
Obtained from: OpenBSD
1997-03-23 20:08:22 +00:00