John Baldwin 91d5354a2c Locking for the per-process resource limits structure. ... - struct plimit includes a mutex to protect a reference count. The plimit structure is treated similarly to struct ucred in that is is always copy on write, so having a reference to a structure is sufficient to read from it without needing a further lock. - The proc lock protects the p_limit pointer and must be held while reading limits from a process to keep the limit structure from changing out from under you while reading from it. - Various global limits that are ints are not protected by a lock since int writes are atomic on all the archs we support and thus a lock wouldn't buy us anything. - All accesses to individual resource limits from a process are abstracted behind a simple lim_rlimit(), lim_max(), and lim_cur() API that return either an rlimit, or the current or max individual limit of the specified resource from a process. - dosetrlimit() was renamed to kern_setrlimit() to match existing style of other similar syscall helper functions. - The alpha OSF/1 compat layer no longer calls getrlimit() and setrlimit() (it didn't used the stackgap when it should have) but uses lim_rlimit() and kern_setrlimit() instead. - The svr4 compat no longer uses the stackgap for resource limits calls, but uses lim_rlimit() and kern_setrlimit() instead. - The ibcs2 compat no longer uses the stackgap for resource limits. It also no longer uses the stackgap for accessing sysctl's for the ibcs2_sysconf() syscall but uses kernel_sysctl() instead. As a result, ibcs2_sysconf() no longer needs Giant. - The p_rlimit macro no longer exists. Submitted by: mtm (mostly, I only did a few cleanups and catchups) Tested on: i386 Compiled on: alpha, amd64		2004-02-04 21:52:57 +00:00
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linux_file.c	Do not call VOP_GETATTR in getdents function. It does not serve any	2003-11-19 04:12:32 +00:00
linux_getcwd.c	Add a MAC check for VOP_LOOKUP() in the Linux getwcd() implementation.	2003-11-17 18:57:20 +00:00
linux_ioctl.c	Replace the if_name and if_unit members of struct ifnet with new members	2003-10-31 18:32:15 +00:00
linux_ioctl.h	Add an ioctl handler for the DRM. This removes the need for the DRM_LINUX	2003-04-24 23:36:35 +00:00
linux_ipc.c	Back out the following revisions:	2003-11-05 01:53:10 +00:00
linux_ipc.h	- Add support for IPC_64 extensions into shmctl(2), semctl(2) and msgctl(2);	2002-10-11 11:43:09 +00:00
linux_mib.c	Use __FBSDID().	2003-06-10 21:29:12 +00:00
linux_mib.h	Add a cleanup function to destroy the osname_lock and call it on module	2003-03-26 18:29:44 +00:00
linux_misc.c	Locking for the per-process resource limits structure.	2004-02-04 21:52:57 +00:00
linux_signal.c	Use __FBSDID().	2003-06-10 21:29:12 +00:00
linux_signal.h	Remove __P.	2002-03-20 05:48:58 +00:00
linux_socket.c	Quick fix for LINT breakage caused by interface changes in accept(2), etc.	2003-12-25 09:59:02 +00:00
linux_socket.h	Fix typo in the BSD copyright: s/withough/without/	2002-06-02 20:05:59 +00:00
linux_stats.c	Prevent leaking of fsid to non-root users in linux_statfs and linux_fstatfs.	2003-11-05 23:52:54 +00:00
linux_sysctl.c	Use __FBSDID().	2003-06-10 21:29:12 +00:00
linux_uid16.c	Reject negative ngrp arguments in linux_setgroups() and linux_setgroups16();	2003-10-21 11:00:33 +00:00
linux_util.c	VOP_GETATTR() wants the vnode passed to it to be locked. Instead	2004-01-14 22:38:03 +00:00
linux_util.h	Add function linux_msg() for regulating output from the linux emulation	2003-01-02 02:19:10 +00:00