KATO Takenori 81bca6ddae Clustered read and write are switched at mount-option level. ... 1. Clustered I/O is switched by the MNT_NOCLUSTERR and MNT_NOCLUSTERW bits of the mnt_flag. The sysctl variables, vfs.foo.doclusterread and vfs.foo.doclusterwrite are deleted. Only mount option can control clustered I/O from userland. 2. When foofs_mount mounts block device, foofs_mount checks D_CLUSTERR and D_CLUSTERW bits of the d_flags member in the block device switch table. If D_NOCLUSTERR / D_NOCLUSTERW are set, MNT_NOCLUSTERR / MNT_NOCLUSTERW bits will be set. In this case, MNT_NOCLUSTERR and MNT_NOCLUSTERW cannot be cleared from userland. 3. Vnode driver disables both clustered read and write. 4. Union filesystem disables clutered write. Reviewed by: bde		1997-09-27 13:40:20 +00:00
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ffs_alloc.c	[Regarding the previous patch] This is completely wrong.	1997-09-19 11:13:16 +00:00
ffs_balloc.c	Removed unused #includes.	1997-08-02 14:33:27 +00:00
ffs_extern.h	Clustered read and write are switched at mount-option level.	1997-09-27 13:40:20 +00:00
ffs_inode.c	Removed unused #includes.	1997-09-02 20:06:59 +00:00
ffs_subr.c	Update a number of panic messages to reflect the actual name	1997-03-09 06:00:44 +00:00
ffs_tables.c	Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not	1997-02-22 09:48:43 +00:00
ffs_vfsops.c	Clustered read and write are switched at mount-option level.	1997-09-27 13:40:20 +00:00
ffs_vnops.c	Clustered read and write are switched at mount-option level.	1997-09-27 13:40:20 +00:00
fs.h	Fixed corrupted newline and corrupted tab in previous commit.	1997-03-24 03:19:37 +00:00