cylinder groups to work correctly, with minor modifications by me to work
with our FFS_EI code. From the FreeBSD commit message:
The ffs superblock includes a 128-byte region for use by temporary
in-core pointers to summary information. An array in this region
(fs_csp) could overflow on filesystems with a very large number of
cylinder groups (~16000 on i386 with 8k blocks). When this happens,
other fields in the superblock get corrupted, and fsck refuses to
check the filesystem.
Solve this problem by replacing the fs_csp array in 'struct fs'
with a single pointer, and add padding to keep the length of the
128-byte region fixed. Update the kernel and userland utilities
to use just this single pointer.
With this change, the kernel no longer makes use of the superblock
fields 'fs_csshift' and 'fs_csmask'. Add a comment to newfs/mkfs.c
to indicate that these fields must be calculated for compatibility
with older kernels.
Reviewed by: mckusick
code considerably and was mainly providing SGI specific logging facilities
and some hacks to improve the relyablility on SGI systems by increasing
priorities etc...
- replace the unused fs_headswitch and fs_trkseek with fs_id[2], bringing
our struct fs closer to that in freebsd & openbsd (& solaris FWIW)
- dumpfs: improve warning message when cpc == 0
- Add -u option, to update one user's records only.
- Add -s option, to update the secure database only.
- Give us roughly 1MB of cache per 50kB of password file, but keep within
a 2MB minimum and 8MB maximum.
- Tidy a little.
determine the endianness of the `struct fs *o' superblock from o->fs_magic
and set needswap as necessary, rather than trusting the caller to get
it right. invariably, almost every caller of ffs_sb_swap() was calling it
with ns set to the wrong value for ns anyway!
ansi KNF ffs_bswap.c declarations whilst here.
this fixes all sorts of problems when trying to use other-endian file systems,
notably the kernel trying to access memory *way* off, possibly corrupting or
panicing, and userland programs SEGVing and/or corrupting things (e.g,
"fsck_ffs -B" to swap a file system endianness).
whilst the previous rev of ffs_bswap.c (1.10, 2000/12/23) made this problem
worse, i suspect that the problem was always there and previous versions
just happened not to trash things at the wrong time.
FFS_EI should now be a lot more stable.
in a variable that can be added other maps than amd.home. Patch submitted
in PR 11826 by Anthony Mallet <anthony.mallet@ficus.yi.org>
* Slightly optimize calculation of DOMAIN
server1,server2,server3 on the command line. This allows the user to
optionally avoid the interactive mode of ypinit. If the -l flag is not
supplied, the old behavior is retained.
This allows users to do things like rsh out creation of YP clients, and
sushi to generate yp clients/servers/slaves.
itojun