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author | kato <kato@FreeBSD.org> | 1997-09-27 13:40:20 +0000 |
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committer | kato <kato@FreeBSD.org> | 1997-09-27 13:40:20 +0000 |
commit | fe9b86cf0b7a453c772a2756389fda91c12c3fab (patch) | |
tree | e695260038ca9665181b5b5c99ae6fa77fba443a /sys/gnu/fs/ext2fs/ext2_extern.h | |
parent | 31e1d6ad00b9d8f39549115d4ef76fbee62e9748 (diff) | |
download | FreeBSD-src-fe9b86cf0b7a453c772a2756389fda91c12c3fab.zip FreeBSD-src-fe9b86cf0b7a453c772a2756389fda91c12c3fab.tar.gz |
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
Diffstat (limited to 'sys/gnu/fs/ext2fs/ext2_extern.h')
-rw-r--r-- | sys/gnu/fs/ext2fs/ext2_extern.h | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/sys/gnu/fs/ext2fs/ext2_extern.h b/sys/gnu/fs/ext2fs/ext2_extern.h index 277106b..4c32799 100644 --- a/sys/gnu/fs/ext2fs/ext2_extern.h +++ b/sys/gnu/fs/ext2fs/ext2_extern.h @@ -42,19 +42,6 @@ #ifndef _SYS_GNU_EXT2FS_EXT2_EXTERN_H_ #define _SYS_GNU_EXT2FS_EXT2_EXTERN_H_ -/* - * Sysctl values for the ext2fs filesystem. - */ -#define EXT2FS_CLUSTERREAD 1 /* cluster reading enabled */ -#define EXT2FS_CLUSTERWRITE 2 /* cluster writing enable */ -#define EXT2FS_MAXID 3 /* number of valid ext2fs ids */ - -#define EXT2FS_NAMES {\ - {0, 0}, \ - { "doclusterread", CTLTYPE_INT }, \ - { "doculsterwrite", CTLTYPE_INT }, \ -} - struct dinode; struct ext2_inode; struct inode; |