src/sys/gnu/ext2fs/ext2_readwrite.c, branch releng/5.3

Remove advertising clause from University of California Regent's

2004-04-07T20:46:16Z

license, per letter dated July 22, 1999 and email from Peter Wemm, Alan Cox and Robert Watson. Approved by: core, peter, alc, rwatson

Enforce the file size limit in VOP_WRITE() as well as VOP_TRUNCATE();

2004-02-19T09:06:06Z

pointed out by bde.

Locking for the per-process resource limits structure.

2004-02-04T21:52:57Z

- 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

Spell magic '16' number as IO_SEQSHIFT.

2004-01-19T20:03:43Z

Remove register keyword.

2002-05-16T19:43:28Z

Complete the separation of ext2fs from ufs by copying the remaining

2002-05-16T19:08:03Z

shared code and converting all ufs references. Originally it may have made sense to share common features between the two filesystems, but recently it has only caused problems, the UFS2 work being the final straw. All UFS_* indirect calls are now direct calls to ext2_* functions, and ext2fs-specific mount and inode structures have been introduced.

KSE Milestone 2

2001-09-12T08:38:13Z

Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha

Grab the process lock while calling psignal and before calling psignal.

2001-03-07T03:37:06Z

Proc locking, mostly protecting p_ucred while obtaining additional

2001-01-23T22:41:15Z

references.

Avoid a data-consistency race between write() and mmap()

2000-12-17T23:57:05Z

by ensuring that newly allocated blocks are zerod. The race can occur even in the case where the write covers the entire block. Reported by: Sven Berkvens , Marc Olzheim