size to be reduced substantially. (backward compatibility verified
by compiling one of the alpha boot blocks which uses all of the code
before and after, diffing the object files, and manually verifying that
the differences were 'correct'. some differences were "unavoidable,"
it wanting to avoid a double-commit, because e.g. local variables which
were previously used were no longer used.) a README which describes
supported options (or at least the ones mentioned below) is forthcoming.
add support for the preprocessor macro LIBSA_NO_TWIDDLE, which
causes calls to twiddle() to be omitted if it's defined.
add support for the preprocessor macros:
LIBSA_NO_FS_CLOSE
LIBSA_NO_FS_WRITE
LIBSA_NO_FS_SEEK
which, if defined, cause the corresponding file system operations
in the individual file system implementations to be omitted. (note
that all of those macros are not supported by all file systems at
this point. comments were added to individual file system files
to indicate lack of support, and should be cleaned up later. Backward
compatibility options e.g. UFS_NOCLOSE, etc., are supported.)
add support for the preprocessor macro LIBSA_NO_FS_SYMLINK, which
removes support for symbolic links from the file system support
functions. (same notes as for the macros above apply.)
add support for the preprocessor macro LIBSA_FS_SINGLECOMPONENT which
removes all subdirectory and symlink support from the file system
support functions. (same notes as for the macros above apply.)
add support for the preprocessor macro LIBSA_NO_FD_CHECKING, which
causes code relating to libsa file descriptor checks (e.g. range
checking and checking that a file descriptor is valid) to be
omitted if it's defined.
add support for the preprocessor macro LIBSA_NO_RAW_ACCESS, which
causes code relating to raw device access to be omitted if it's
defined.
change some structure copies to use bcopy() instead. that way
use of bcopy vs. memcpy() can easily be selected by
LIBSA_USE_MEMCPY. (without changes like these, you could end up
having both bcopy() and memcpy() included. eventually, all
calls to bcopy should be changed to calls to memcpy() or memmove()
as appropriate -- hopefully never the latter -- with an option to
use bcopy instead.)
add support for the preprocessor macro LIBSA_NO_DISKLABEL_MSGS, which
causes disklabel() to return '1' as msg rather than a string. Can
be used if the boot blocks don't care about the string, and need to
save the space.
add support for the preprocessor macro LIBSA_SINGLE_FILESYSTEM, which
if defined causes all of the file system switch code to be removed.
Its value should be the name of the file system supported by the
boot block, e.g. "ufs" for the FFS file system. calls to the
file system functions open, close, etc., which were previously
done through a function switch are then done via direct invocation
of <fs>_open, <fs>_close, etc. (e.g. ufs_open, ...).
add support for the preprocessor macro LIBSA_SINGLE_DEVICE, which
does the equivalent of LIBSA_SINGLE_FILESYSTEM but for the device
switch table. Device entry pointes are expected to be named
<dev>foo, e.g. the 'strategy' routine used when LIBSA_SINGLE_DEVICE
is set to 'disk' is diskstrategy.
make ufs.c f_nindir array be unsigned ints. the fact that it was signed
caused ufs.c to require signed division routines (which were otherwise
unnecessary for a small boot block).
a small implementation of memcpy(). libsa memcpy() wouldn't
do the right thing if LIBSA_USE_MEMCPY was defined, and the whole
point of that define is to get rid of either bcopy() or memcpy().
(cloned from the bcopy() code.)
or LIBSA_USE_MEMCPY is defined. Most everything pulls in stand.h so
this should cover ports that only use memset/memcpy but still want to
pull in as much as possible from sys/lib/libsa.
not, depending on the port-specific environment.
Separate panic() and exit() so that the mi/default panic() can be used
without conflicting with a local exit() definition, move exit(void)
prototype to the default exit() implementation.
Closes PR bin/6990 by Wolfgang Helbig <helbig@Informatik.BA-Stuttgart.DE>.
increasing block numbers and don't reread cylinder 0.
2. Recognize the USTAR.... meta-info file...kind of like a super-block,
it makes the volume size and label info programmable.
addressing and disk changing code. Separate disk addressing into three layers.
(virtual: ustar format space spanning volumes, logical: format space relative
to current volume, and physical: standard meaning). Compute a checksum of the
disk 0 8k label area, and define a label for disk 2, 3.... Detect incorrect
disk changing order and attempt to recognize our disk 0 from its checksum.
backoff mechanism we use for receiving the response. This is particularly
helpful when we have transient errors on transmit, e.g. a very busy
network or router.
compressed mode when we zero out the structure. Check_header() now
does not force us to uncompressed mode if we read no data (EOF);
it leaves the default, so that if we check at the end of a file,
we don't set the file to uncompressed mode and blow up later lseeks
on it.
to 312 bytes (The classical 64 bytes are likely to be too small if a
rootpath is transferred.)
-make CMU vendor extension support optional
-remove code handling domain name/server (unneeded for boot code)
- -Wall fixes in debug code
Use <net/if_ether.h> for ethernet specific definitions, and insert private
definitions for ARP if needed. (The new ARP macros in <net/if_arp.h> are
not used because they create larger code, and we really don't need more
than ethernet/ip support here.)
Some of the stuff (e.g., rarpd, bootpd, dhcpd etc., libsa) still will
only support Ethernet. Tcpdump itself should be ok, but libpcap needs
lot of work.
For the detailed change history, look at the commit log entries for
the is-newarp branch.
Add SUPPORT_BOOTP (and global try_bootp) to allow MD code to
determine whether BOOTP is used (compile-time and run-time).
Thanks to Matthias Drochner for the SUPPORT_BOOTP ideas.
Copyright asigned to The NetBSD Foundation.
EINVAL, that error code is ignored, leaving whatever other meaningful
error code that might have previously been returned intact. Stand-alone
file system implementations return EINVAL typically when the file system
is not recognized (i.e. cd9660_open on a UFS file system, ufs_open on a
cd9660 file system, etc.). This meant that if you had multiple file
systems in a file system switch, the first returned ENOENT (because
it recognized the file system type, but the file wasn't there) and
the second returned EINVAL (because it didn't recognize the file system
type), errno would be set to EINVAL. Now it'll be set to ENOENT.
It would probably make sense to have file systems return a special
error code to indicate "this file system is unrecognized," which
could then be special-cased, but that's a fair bit more invasive.
to :, so they can be used e.g. with <bsd.prog.mk>. Standardize variable
names used to configure kernel libraries.
Variables used by these Makefile.inc's are:
S must be set to the top of the 'sys' tree.
${LIB}DST may be set to the location of the directory where library
objects are to be built. Defaults to ${.OBJDIR}/lib/${lib}.
${LIB}_AS may be set to 'obj' to build a object from the library's
object files. (Otherwise, a library will be built.)
Defaults to 'library'.
${LIB}MISCMAKEFLAGS
Miscellaneous flags to be passed to the library's Makefile when
building. See library's Makefile for more details about
supported flags and their default values.
(where LIB is KERN, SA, or Z, and lib is kern, sa, or z, depending on which
library's Makefile.inc is being discussed.)
rename 'NO_NET' variable to SA_INCLUDE_NET, which defaults to 'yes' but can
be set differently. kill EXTRACFLAGS, add SACPPFLAGS (generated from
CPPFLAGS by Makefile.inc) to CFLAGS. Add support for including gzipped-file
read support, enabled by setting SA_USE_CREAD to yes (defaults to no).
best-fit, rather than first-fit, algorithm.
ability to handle free()s with zero size (needed for gzip read
support).
ability to start the heap someplace else (defined by HEAP_START).
ability to limit growth of the heap (via HEAP_LIMIT).
debugging sanity checks (ifdef DEBUG).
allocation tracing support, to help debugging (ifdef ALLOC_TRACE).
and from me:
ability to pick a (smaller) first-fit algorithm (via ALLOC_FIRST_FIT).
lots of comments.
If heap limits and all of the debugging features are disabled (the default),
and ALLOC_FIRST_FIT is defined (not the default), compiled with -O on the
alpha the new version is the same (object) size as the old version.
F_NODEV isn't set in the file flags for the file being opened.
Pointed out by Matthias Drochner in PR 3122. (fix equivalent to
the one he included, but stylistically different.)
these are hacks (s/long/int/, etc.), but this code really needs a heavy
cleaning (including fixed-size typing) and I don't have time to give it one
now.
size of the resulting loader. The read_inode() function now returns the
result of the strategy function instead of success in all cases (ufs.c).
Fixes pr#1817
(like the alpha). Biggest problem: IP headers were overlayed with
structure which included pointers, and which therefore didn't overlay
properly on 64-bit machines. Solution: instead of threading pointers
through IP header overlays, add a "queue element" structure to do
the threading, and point it at the ip headers.
simonb