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* This patchset fixes a large number of file descriptor race conditions.Matthew Dillon2000-11-181-0/+666
| | | | | | | | | | | | | | | Pre-rfork code assumed inherent locking of a process's file descriptor array. However, with the advent of rfork() the file descriptor table could be shared between processes. This patch closes over a dozen serious race conditions related to one thread manipulating the table (e.g. closing or dup()ing a descriptor) while another is blocked in an open(), close(), fcntl(), read(), write(), etc... PR: kern/11629 Discussed with: Alexander Viro <viro@math.psu.edu> Notes: svn path=/head/; revision=68883
* Cleanup after repo copy of sys/svr4 to sys/compat/svr4.David E. O'Brien2000-08-3156-14117/+0
| | | | Notes: svn path=/head/; revision=65302
* Regen. (Fix SYS_exit)Peter Wemm2000-07-294-7/+7
| | | | Notes: svn path=/head/; revision=64002
* Sigh. Fix SYS_exit problems. I misunderstood the significance of thesePeter Wemm2000-07-291-1/+1
| | | | | | | trailing options. Notes: svn path=/head/; revision=64001
* Regenerate with makesyscalls.shPeter Wemm2000-07-294-7/+7
| | | | Notes: svn path=/head/; revision=63987
* Change the 'exit()' system call to 'sys_exit()'. This avoids overlappingPeter Wemm2000-07-291-1/+1
| | | | | | | | | gcc's internal exit() prototypes and the (futile) hackery that we did to try and avoid warnings. main() was renamed for similar reasons. Remove an exit related hack from makesyscalls.sh. Notes: svn path=/head/; revision=63986
* Add snapshots to the fast filesystem. Most of the changes supportKirk McKusick2000-07-111-0/+4
| | | | | | | | | | | | | | | | | | | | | | | the gating of system calls that cause modifications to the underlying filesystem. The gating can be enabled by any filesystem that needs to consistently suspend operations by adding the vop_stdgetwritemount to their set of vnops. Once gating is enabled, the function vfs_write_suspend stops all new write operations to a filesystem, allows any filesystem modifying system calls already in progress to complete, then sync's the filesystem to disk and returns. The function vfs_write_resume allows the suspended write operations to begin again. Gating is not added by default for all filesystems as for SMP systems it adds two extra locks to such critical kernel paths as the write system call. Thus, gating should only be added as needed. Details on the use and current status of snapshots in FFS can be found in /sys/ufs/ffs/README.snapshot so for brevity and timelyness is not included here. Unless and until you create a snapshot file, these changes should have no effect on your system (famous last words). Notes: svn path=/head/; revision=62976
* Modify ktrace's general I/O tracing, ktrgenio(), to use a struct uio *Brian Feldman2000-07-021-6/+14
| | | | | | | | | | | | | | | | instead of a struct iovec * array and int len. Get rid of stupidly trying to allocate all of the memory and copyin()ing the entire iovec[], and instead just do the proper VOP_WRITE() in ktrwrite() using a copy of the struct uio that the syscall originally used. This solves the DoS which could easily be performed; to work around the DoS, one could also remove "options KTRACE" from the kernel. This is a very strong MFC candidate for 4.1. Found by: art@OpenBSD.org Notes: svn path=/head/; revision=62378
* fix races in the uidinfo subsystem, several problems existed:Alfred Perlstein2000-06-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | 1) while allocating a uidinfo struct malloc is called with M_WAITOK, it's possible that while asleep another process by the same user could have woken up earlier and inserted an entry into the uid hash table. Having redundant entries causes inconsistancies that we can't handle. fix: do a non-waiting malloc, and if that fails then do a blocking malloc, after waking up check that no one else has inserted an entry for us already. 2) Because many checks for sbsize were done as "test then set" in a non atomic manner it was possible to exceed the limits put up via races. fix: instead of querying the count then setting, we just attempt to set the count and leave it up to the function to return success or failure. 3) The uidinfo code was inlining and repeating, lookups and insertions and deletions needed to be in their own functions for clarity. Reviewed by: green Notes: svn path=/head/; revision=61976
* Back out the previous change to the queue(3) interface.Jake Burkholder2000-05-261-2/+2
| | | | | | | | | It was not discussed and should probably not happen. Requested by: msmith and others Notes: svn path=/head/; revision=60938
* Change the way that the queue(3) structures are declared; don't assume thatJake Burkholder2000-05-231-2/+2
| | | | | | | | | | | the type argument to *_HEAD and *_ENTRY is a struct. Suggested by: phk Reviewed by: phk Approved by: mdodd Notes: svn path=/head/; revision=60833
* Regenerated (to fix "created from" lines, and to fix the previousBruce Evans2000-05-104-5/+5
| | | | | | | | regeneration which somehow used the wrong syscalls.master file, resulting in unbuildable svr4_sysent.c). Notes: svn path=/head/; revision=60325
* Fixed the "created from" lines generated from this file. makesyscalls.shBruce Evans2000-05-101-6/+6
| | | | | | | | | expects the active id to be on the first line of the specification file. Fixed some nearby gratuitous differences with kern/syscalls.master. Notes: svn path=/head/; revision=60324
* Regenerated (fixed the calculation of sy_nargs in sysent tables).Bruce Evans2000-05-092-127/+131
| | | | Notes: svn path=/head/; revision=60290
* Don't forget to back up svr4_syscallnames.c. Don't depend on side effectsBruce Evans2000-05-091-2/+3
| | | | | | | to generate it. Notes: svn path=/head/; revision=60289
* Fixed the return type and args struct tag for exit(). They were wrong inBruce Evans2000-05-091-1/+1
| | | | | | | | all emulators. These entries were unused, so the bug had no effect, but the the args struct tag will be used to calculate sy_nargs correctly. Notes: svn path=/head/; revision=60271
* Give the "streams" modulea version (1) and depend on it from theBrian Feldman2000-05-061-0/+1
| | | | | | | | "svr4elf" module. This unbreaks the SVR4 KLD (which had an undefined function because of thenewly-committed KLD enhancements). Notes: svn path=/head/; revision=60060
* Remove unneeded #include <vm/vm_zone.h>Poul-Henning Kamp2000-04-302-2/+0
| | | | | | | Generated by: src/tools/tools/kerninclude Notes: svn path=/head/; revision=59794
* Remove unneeded #include <sys/kernel.h>Poul-Henning Kamp2000-04-292-2/+0
| | | | Notes: svn path=/head/; revision=59760
* Remove ~25 unneeded #include <sys/conf.h>Poul-Henning Kamp2000-04-191-1/+0
| | | | | | | Remove ~60 unneeded #include <sys/malloc.h> Notes: svn path=/head/; revision=59391
* Remove unneeded <sys/buf.h> includes.Poul-Henning Kamp2000-04-182-2/+0
| | | | | | | | Due to some interesting cpp tricks in lockmgr, the LINT kernel shrinks by 924 bytes. Notes: svn path=/head/; revision=59368
* Change our ELF binary branding to something more acceptable to the BinutilsDavid E. O'Brien2000-04-181-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | maintainers. After we established our branding method of writing upto 8 characters of the OS name into the ELF header in the padding; the Binutils maintainers and/or SCO (as USL) decided that instead the ELF header should grow two new fields -- EI_OSABI and EI_ABIVERSION. Each of these are an 8-bit unsigned integer. SCO has assigned official values for the EI_OSABI field. In addition to this, the Binutils maintainers and NetBSD decided that a better ELF branding method was to include ABI information in a ".note" ELF section. With this set of changes, we will now create ELF binaries branded using both "official" methods. Due to the complexity of adding a section to a binary, binaries branded with ``brandelf'' will only brand using the EI_OSABI method. Also due to the complexity of pulling a section out of an ELF file vs. poking around in the ELF header, our image activator only looks at the EI_OSABI header field. Note that a new kernel can still properly load old binaries except for Linux static binaries branded in our old method. * * For a short period of time, ``ld'' will also brand ELF binaries * using our old method. This is so people can still use kernel.old * with a new world. This support will be removed before 5.0-RELEASE, * and may not last anywhere upto the actual release. My expiration * time for this is about 6mo. * Notes: svn path=/head/; revision=59342
* Fix handling of svr4_sigsets, which are implemented in SysVR4 as a sequenceMark Newton2000-01-152-15/+51
| | | | | | | | | | | | | | | | | | | | | | | of 4 longs used as a bitmask. sv4r4_sigfillset has been broken for a while, probably since rev 1.5. This patch fixes SVR4_NSIG (i.e.: sets it to the actual number of signals, instead of the number of bits in the mask) because some SysVR4 clients honestly seem to care about whether bits in the signal mask are set for non-existant signals. Additionally, the svr4_sigfillset macro has been replaced by a fully fledged function, because the macro didn't actually work (it returned an all-ones mask, but we don't want that: we want 0's set where FreeBSD doesn't actually have a signal which is the same as an SysVR4 signal, for example). SysVR4 clients can now successfully ignore signals, although catching them remains problematic (see commit log message for rev1.13 of sys/i386/svr4/svr4_machdep.c for more info). Notes: svn path=/head/; revision=56046
* Remove some all-too-wordy debugging printsMark Newton2000-01-151-5/+0
| | | | Notes: svn path=/head/; revision=56045
* Removed bogus include of opt_global.h. opt_global.h is automaticallyBruce Evans2000-01-091-1/+0
| | | | | | | | | included in all C files if it makes sense (i.e., for compiling kernels but not for compiling modules), so including it explicitly just complicates module makefiles. Notes: svn path=/head/; revision=55657
* Need to #include vm_zone.h to pick up inline definition of zfree() so thatMark Newton2000-01-031-0/+1
| | | | | | | NDFREE() macro from namei.h will be happy. Notes: svn path=/head/; revision=55355
* Introduce NDFREE (and remove VOP_ABORTOP)Eivind Eklund1999-12-152-1/+4
| | | | Notes: svn path=/head/; revision=54655
* Replace the svr4_sys_getdents64() routine with a port of linux_getdents() --Mark Newton1999-12-121-85/+124
| | | | | | | | | | | | | | | differences between the VFS interface between FreeBSD and NetBSD make it easier to pick up the Linux one than to continue development with the NetBSD port. This patch fixes a bug which caused duplicate filenames to be seen by callers to svr4_sys_getdents64(), leading to malformed directory listings from Solaris client programs. Obtained from: The Linuxulator, with a pointer from marcel Notes: svn path=/head/; revision=54494
* Avoid excessive redundancy in svr4_sys_getmsg() and svr4_sys_putmsg():Mark Newton1999-12-121-8/+8
| | | | | | | | | Only look up the provided descriptor in fd_ofiles[] once. Submitted by: Ville-Pertti Keinone <will@iki.fi> Notes: svn path=/head/; revision=54493
* fd_revoke() shouldn't panic if the descriptor provided is not a file orMark Newton1999-12-121-9/+2
| | | | | | | | | socket. Return EINVAL instead. Submitted by: Ville-Pertti Keinone <will@iki.fi> Notes: svn path=/head/; revision=54492
* Remove unnecessary includesMark Newton1999-12-0811-68/+19
| | | | | | | Prodded by: phk Notes: svn path=/head/; revision=54305
* SVR4 emulator source files now take their compilation options fromMark Newton1999-12-088-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | opt_global.h and opt_svr4.h, instead of from the command line. This brings them in-line with most of the rest of the kernel. svr4_ioctl.c has also failed to compile with debugging for a while now; fixed by adding systm.h and socketvar. Some svr4 source files are automatically generated from syscalls.master; these have been committed as consequential changes, otherwise everyone will have to "make svr4_sysent.c". Changes: sys/svr4/svr4.h include opt_global.h and opt_svr4.h sys/svr4/svr4_ioctl.c include svr4.h, sys/systm.h and sys/socketvar.h sys/svr4/svr4_ipc.c include svr4.h sys/svr4/svr4_resource.c include svr4.h sys/svr4/svr4_socket.c include svr4.h sys/svr4/svr4_ttold.c include svr4.h sys/svr4/syscalls.master include svr4.h sys/svr4/svr4_syscallnames.c dependent on syscalls.master sys/svr4/svr4_sysent.c dependent on syscalls.master sys/svr4/svr4_syscall.h dependent on syscalls.master sys/svr4/svr4_proto.h dependent on syscalls.master sys/modules/svr4/Makefile create opt_global.h and opt_svr4.h Notes: svn path=/head/; revision=54300
* General clean-up of socket.h and associated sources to synchronise upPoul-Henning Kamp1999-11-241-1/+1
| | | | | | | | | | | | | | | with NetBSD and the Single Unix Specification v2. This updates some structures with other, almost equivalent types and effort is under way to get the whole more consistent. Also removes a double definition of INET6 and some other clean-ups. Reviewed by: green, bde, phk Some part obtained from: NetBSD, SUSv2 specification Notes: svn path=/head/; revision=53678
* s/p_cred->pc_ucred/p_ucred/gPoul-Henning Kamp1999-11-211-1/+1
| | | | Notes: svn path=/head/; revision=53503
* useracc() the prequel:Poul-Henning Kamp1999-10-292-2/+0
| | | | | | | | | | | | | | Merge the contents (less some trivial bordering the silly comments) of <vm/vm_prot.h> and <vm/vm_inherit.h> into <vm/vm.h>. This puts the #defines for the vm_inherit_t and vm_prot_t types next to their typedefs. This paves the road for the commit to follow shortly: change useracc() to use VM_PROT_{READ|WRITE} rather than B_{READ|WRITE} as argument. Notes: svn path=/head/; revision=52635
* Remove unnecessary includes.Mark Newton1999-10-172-20/+0
| | | | | | | | | | | phk's script walked through .c and .h files, but some of the ones on the list are actually derived from sys/svr4/syscalls.master. Make the necessary changes here and the others will implicitly follow... Submitted by: phk Notes: svn path=/head/; revision=52334
* Remove unnecessary includes.Mark Newton1999-10-1715-55/+4
| | | | | | | Submitted by: phk Notes: svn path=/head/; revision=52333
* Add a per-signal flag to mark handlers registered with osigaction, so weLuoqi Chen1999-10-111-1/+1
| | | | | | | | | | | | | | | | | | can provide the correct context to each signal handler. Fix broken sigsuspend(): don't use p_oldsigmask as a flag, use SAS_OLDMASK as we did before the linuxthreads support merge (submitted by bde). Move ps_sigstk from to p_sigacts to the main proc structure since signal stack should not be shared among threads. Move SAS_OLDMASK and SAS_ALTSTACK flags from sigacts::ps_flags to proc::p_flag. Move PS_NOCLDSTOP and PS_NOCLDWAIT flags from proc::p_flag to procsig::ps_flag. Reviewed by: marcel, jdp, bde Notes: svn path=/head/; revision=52140
* Removal of sys/device.hNick Hibma1999-10-051-1/+0
| | | | | | | | | | | | | | | | - Move intrhook stuff into kernel.h - Remove all occurrences of #device <device.h> - Add kernel.h were necessary (nowhere) - delete device.h This file contained the structures for cfdata (old style config) and is no longer used. It was included by most drivers. It confuses the remote debugger as the definition of 'struct device' in device.h is found before the one in bus_private.h. Notes: svn path=/head/; revision=51957
* Oops. That'll teach me to commit without testing. I either replacedPeter Wemm1999-10-011-1/+1
| | | | | | | | one trigraph with another, or completely missed the point. Kill it for real this time. Notes: svn path=/head/; revision=51844
* Zap a trigraph (???)Peter Wemm1999-10-011-1/+1
| | | | Notes: svn path=/head/; revision=51843
* sigset_t change (part 4 of 5)Marcel Moolenaar1999-09-294-67/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------- The compatibility code and/or emulators have been updated: iBCS2 now mostly uses the older syscalls. SVR4 now properly handles all signals. This has been achieved by using the new sigset_t throughout the emulator. The Linuxulator has been severely updated. Internally the new Linux sigset_t is made the default. These are then mapped to and from the new FreeBSD sigset_t. Also, rt_sigsuspend has been implemented in the Linuxulator. Implementing this syscall basicly caused all this sigset_t changing in the first place and the syscall has been used throughout the change as a means for testing. It basicly is too much work to undo the implementation so that it can later be added again. A special note on the use of sv_sigtbl and sv_sigsize in struct sysentvec: Every signal larger than sv_sigsize is not translated and is passed on to the signal handler unmodified. Signals in the range 1 upto and including sv_sigsize are translated. The rationale is that only the system defined signals need to be translated. The emulators also have been updated so that the translation tables are only indexed for valid (system defined) signals. This change also fixes the translation bug already in the SVR4 emulator. Notes: svn path=/head/; revision=51793
* This is what was "fdfix2.patch," a fix for fd sharing. It's prettyBrian Feldman1999-09-196-33/+21
| | | | | | | | | | | | | | | | | | | | far-reaching in fd-land, so you'll want to consult the code for changes. The biggest change is that now, you don't use fp->f_ops->fo_foo(fp, bar) but instead fo_foo(fp, bar), which increments and decrements the fp refcount upon entry and exit. Two new calls, fhold() and fdrop(), are provided. Each does what it seems like it should, and if fdrop() brings the refcount to zero, the fd is freed as well. Thanks to peter ("to hell with it, it looks ok to me.") for his review. Thanks to msmith for keeping me from putting locks everywhere :) Reviewed by: peter Notes: svn path=/head/; revision=51418
* Add MAINTAINER lineMark Newton1999-09-011-0/+2
| | | | Notes: svn path=/head/; revision=50718
* $Id$ -> $FreeBSD$Peter Wemm1999-08-2852-52/+52
| | | | Notes: svn path=/head/; revision=50477
* Simplify the handling of VCHR and VBLK vnodes using the new dev_t:Poul-Henning Kamp1999-08-261-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the alias list a SLIST. Drop the "fast recycling" optimization of vnodes (including the returning of a prexisting but stale vnode from checkalias). It doesn't buy us anything now that we don't hardlimit vnodes anymore. Rename checkalias2() and checkalias() to addalias() and addaliasu() - which takes dev_t and udev_t arg respectively. Make the revoke syscalls use vcount() instead of VALIASED. Remove VALIASED flag, we don't need it now and it is faster to traverse the much shorter lists than to maintain the flag. vfs_mountedon() can check the dev_t directly, all the vnodes point to the same one. Print the devicename in specfs/vprint(). Remove a couple of stale LFS vnode flags. Remove unimplemented/unused LK_DRAINED; Notes: svn path=/head/; revision=50405
* Avoid possible panic by checking for EFAULT from copyinstr() duringMark Newton1999-08-141-5/+12
| | | | | | | | | pathname translation. Submitted by: green Notes: svn path=/head/; revision=49770
* Previous commit also removed some 'const' qualifiers on args forMark Newton1999-07-301-1/+1
| | | | | | | svr4_sys_sendto() which probably shouldn't have been 'const'. Notes: svn path=/head/; revision=49280
* Previous commit also finished cleaning up some dev_t -> udev_t transformationsMark Newton1999-07-305-5/+5
| | | | | | | | | related to the commit for rev 1.3 of svr4_stat.c. svr4_sysvec.c also received a copyright message (which is why it grew by 28 lines). Notes: svn path=/head/; revision=49279
* Fix svr4_sys_poll(); SysV STREAMS produce return values from poll() whichMark Newton1999-07-301-6/+2
| | | | | | | | BSD sockets don't. Guess at a correct emulation for those values (it seems to work for telnet, ftp and friends) Notes: svn path=/head/; revision=49278
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