Commit Graph

20 Commits

Author SHA1 Message Date
Conrad Meyer
aaa3852435 buf: Add B_INVALONERR flag to discard data
Setting the B_INVALONERR flag before a synchronous write causes the buf
cache to forcibly invalidate contents if the write fails (BIO_ERROR).

This is intended to be used to allow layers above the buffer cache to make
more informed decisions about when discarding dirty buffers without
successful write is acceptable.

As a proof of concept, use in msdosfs to handle failures to mark the on-disk
'dirty' bit during rw mount or ro->rw update.

Extending this to other filesystems is left as future work.

PR:		210316
Reviewed by:	kib (with objections)
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D21539
2019-09-11 21:24:14 +00:00
Ed Maste
51e79affa3 makefs: share fat.h between kernel msdosfs and makefs
There is no reason to duplicate this file when it can be trivially
shared (just exposing one section previously under #ifdef _KERNEL).

Reviewed by:	imp, cem
MFC with:	r351273
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D21346
2019-08-21 02:21:40 +00:00
Ed Maste
6ae00e306f Revert msdosfs MAKEFS #ifdef changes from r319870
These changes are not needed for current msdosfs makefs WIP.

Submitted by:	Siva Mahadevan
Sponsored by:	The FreeBSD Foundation
2018-07-24 21:10:17 +00:00
Pedro F. Giffuni
d63027b668 sys/fs: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 15:15:37 +00:00
Ed Maste
db20c27d28 msdosfs: adjust #ifdefs to be similar to NetBSD
- Add header guards where missing
- Make parts available for use in makefs

Sponsored by:	The FreeBSD Foundation
2017-06-12 20:42:37 +00:00
Ed Maste
c8b163b617 msdosfs: correct constant and typo in comment
Revisions:
fat.h	1.5 1.6

Obtained from:	NetBSD
Sponsored by:	The FreeBSD Foundation
2017-05-21 19:48:16 +00:00
Ed Maste
9287dbaae9 msdosfs: capitalize FAT appropriately
Diff reduction with NetBSD, including some nearby minor whitespace or
style fixes.

Obtained from:	NetBSD
Sponsored by:	The FreeBSD Foundation
2017-05-21 19:29:28 +00:00
Warner Losh
d167cf6f3a /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 18:10:42 +00:00
Tom Rhodes
cede1f563c Make msdosfs support the dirty flag in FAT16 and FAT32.
Enable lockf support.

PR:		55861
Submitted by:	Jun Su <junsu@m-net.arbornet.org> (original version)
Reviewed by:	make universe
2003-12-26 17:19:19 +00:00
Alfred Perlstein
11caded34f Remove __P. 2002-03-19 22:20:14 +00:00
John Baldwin
d3990d589f Axe more unused GEMDOS code that was #ifdef atari.
PR:		kern/21809
Submitted by:	<mbendiks@eunet.no>
2001-11-28 16:56:42 +00:00
Peter Wemm
c447342094 Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot).  This is consistant with the other
BSD's who made this change quite some time ago.  More commits to come.
1999-12-29 05:07:58 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Jordan K. Hubbard
952a6212d9 Update MSDOSFS code using NetBSD's msdosfs as a guide to support
FAT32 partitions.  Unfortunately, we looked around here at
Walnut Creek CDROM for any newer FAT32-supporting versions
of Win95 and we were unsuccessful; only the older stuff here.
So this is untested beyond simply making sure it compiles and
someone with access to an actual FAT32 fs will have
to let us know how well it actually works.
Submitted by:	Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
Obtained from:	NetBSD
1998-02-18 09:28:47 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Poul-Henning Kamp
7fefffee96 staticize private parts. 1995-11-07 14:06:45 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
Poul-Henning Kamp
c3c6d51ea0 Added declarations, fixed bugs due to missing decls. At least one of them
could panic a system. (I know, it paniced mine!).
1994-09-27 20:42:59 +00:00
Doug Rabson
27a0bc89a4 Added msdosfs.
Obtained from: NetBSD
1994-09-19 15:41:57 +00:00