Ben Gras [Fri, 30 Mar 2007 15:36:49 +0000 (15:36 +0000)]
replace library time handling functions
mktime, tzset, asctime, ctime, gmtime, localtime, strftime
with zoneinfo implementations in src/commands/zoneinfo, referenced
from src/lib/stdtime/Makefile.in.
Ben Gras [Wed, 21 Mar 2007 09:45:01 +0000 (09:45 +0000)]
after enqueue()ing a process, only pick_proc() a new one if the current
process is not PREEMPTIBLE (or it's not ready, or there isn't a current
process yet). This fixes a case where a process that isn't
PREEMPTIBLE actually gets preempted. (This solves a race condition
between CLOCK and SYSTEM.)
Ben Gras [Fri, 9 Mar 2007 16:03:19 +0000 (16:03 +0000)]
For /dev/mem, map in memory to be copied to memory's own address space
one page at a time, and use safecopies to copy it to the requesting
process.
This lets /dev/mem access the entire physical address space, as the minix
page tables only allow access by default to physical RAM, which breaks
e.g. the VESA X driver in some cases.
Ben Gras [Thu, 8 Mar 2007 15:39:14 +0000 (15:39 +0000)]
. let kernel use read_tsc() from sysutil library
. read_tsc() in sysutil library saves edx and eax now
. added read_tsc_64() by Antonio Mancina to load tsc into
a 64-bit data type directly
. deleted read_tsc.h in favour of a prototype in <minix/syslib.h>
Ben Gras [Wed, 28 Feb 2007 13:13:39 +0000 (13:13 +0000)]
Minor change to path lookup that fixes the bug that creating a file
as a first component of an absolute path failed (e.g. 'touch /file'),
due to leading slashes not being skipped in the processed path counter
in that case, causing create to fail.
Ben Gras [Fri, 23 Feb 2007 12:55:29 +0000 (12:55 +0000)]
If a process does sys_kill on SELF (such as in panic() of servers and drivers
if a PM exit fails, until they are compiled with the new panic() function that
is), don't reply to it as the endpoint has been cleared.
Ben Gras [Tue, 20 Feb 2007 17:09:19 +0000 (17:09 +0000)]
. pci driver now returns devices, even when they have been pci_reserve()d
. pci_reserve() returns an error on devices that have already been reserved,
instead of panic()ing; the pci_reserve() library call still panics,
pci_reserve_ok() returns an int.
. this allows at_wini to use the instance value as intended, as all devices
are seen, even reserved ones
. only devices actually used by at_wini are pci_reserve()d
. pci doesn't release devices based on argv[0], as at_wini both have the
same name and multiple instances won't work together properly
Ben Gras [Fri, 16 Feb 2007 15:54:28 +0000 (15:54 +0000)]
. made memory parsing function into a library call
(moved 'struct memory' to <minix/type.h> for this library call)
. removed some debugging messages from pci library
Ben Gras [Mon, 12 Feb 2007 13:35:33 +0000 (13:35 +0000)]
set 'w_testing' during w_identify(). this means 0-tolerance to
timeouts, and an ATA_IDENTIFY timeout will cause the ATAPI_IDENTIFY
to be skipped, making the cd probe a lot faster.
Ben Gras [Thu, 8 Feb 2007 13:51:35 +0000 (13:51 +0000)]
Make /dev/c1* device nodes on disk and on the boot ramdisk.
. include c1* nodes in std in MAKEDEV
. this requires a slightly larger shell
. this requires a larger blocksize on the boot ramdisk (to fit
/dev/ in direct blocks for mkfs with a proto file)
. also more inodes and kB's on the boot ramdisk
Ben Gras [Thu, 1 Feb 2007 17:50:02 +0000 (17:50 +0000)]
Mostly bugfixes of bugs triggered by the test set.
bugfixes:
SYSTEM:
. removed
rc->p_priv->s_flags = 0;
for the priv struct shared by all user processes in get_priv(). this
should only be done once. doing a SYS_PRIV_USER in sys_privctl()
caused the flags of all user processes to be reset, so they were no
longer PREEMPTIBLE. this happened when RS executed a policy script.
(this broke test1 in the test set)
VFS/MFS:
. chown can change the mode of a file, and chmod arguments are only
part of the full file mode so the full filemode is slightly magic.
changed these calls so that the final modes are returned to VFS, so
that the vnode can be kept up-to-date.
(this broke test11 in the test set)
MFS:
. lookup() checked for sizeof(string) instead of sizeof(user_path),
truncating long path names
(caught by test 23)
. truncate functions neglected to update ctime
(this broke test16)
VFS:
. corner case of an empty filename lookup caused fields of a request
not to be filled in in the lookup functions, not making it clear
that the lookup had failed, causing messages to garbage processes,
causing strange failures.
(caught by test 30)
. trust v_size in vnode when doing reads or writes on non-special
files, truncating i/o where necessary; this is necessary for pipes,
as MFS can't tell when a pipe has been truncated without it being
told explicitly each time.
when the last reader/writer on a pipe closes, tell FS about
the new size using truncate_vn().
(this broke test 25, among others)
. permission check for chdir() had disappeared; added a
forbidden() call
(caught by test 23)
new code, shouldn't change anything:
. introduced RTS_SET, RTS_UNSET, and RTS_ISSET macro's, and their
LOCK variants. These macros set and clear the p_rts_flags field,
causing a lot of duplicated logic like
old_flags = rp->p_rts_flags; /* save value of the flags */
rp->p_rts_flags &= ~NO_PRIV;
if (old_flags != 0 && rp->p_rts_flags == 0) lock_enqueue(rp);
to change into the simpler
RTS_LOCK_UNSET(rp, NO_PRIV);
so the macros take care of calling dequeue() and enqueue() (or lock_*()),
as the case may be). This makes the code a bit more readable and a
bit less fragile.
. removed return code from do_clocktick in CLOCK as it currently
never replies
. removed some debug code from VFS
. fixed grant debug message in device.c
preemptive checks, tests, changes:
. added return code checks of receive() to SYSTEM and CLOCK
. O_TRUNC should never arrive at MFS (added sanity check and removed
O_TRUNC code)
. user_path declared with PATH_MAX+1 to let it be null-terminated
. checks in MFS to see if strings passed by VFS are null-terminated
Ben Gras [Mon, 22 Jan 2007 16:44:03 +0000 (16:44 +0000)]
Don't reply to the caller on RS_DOWN until process is actually dead -
otherwise (e.g.) mounts right after an unmount of the same device don't
work (duplicate label).