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[PATCH] per-mountpoint noatime/nodiratime

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Turn noatime and nodiratime into per-mount instead of per-sb flags.

After all the preparations this is a rather trivial patch.  The mount code
needs to treat the two options as per-mount instead of per-superblock, and
touch_atime needs to be changed to check the new MNT_ flags in addition to
the MS_ flags that are kept for filesystems that are always
noatime/nodiratime but not user settable anymore.  Besides that core code
only nfs needed an update because it's leaving atime updates to the server
and thus sets the S_NOATIME flag on every inode, but needs to know whether
it's a real noatime mount for an getattr optimization.

While we're at it I've killed the IS_NOATIME/IS_NODIRATIME macros that were
only used by touch_atime.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Hellwig 2006-01-09 20:52:17 -08:00 • committed by Linus Torvalds
parent 0d456fa426
commit fc33a7bb9c
6 changed files with 45 additions and 19 deletions
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19
fs/inode.c
View file

@ -22,6 +22,7 @@
#include <linux/cdev.h>
#include <linux/bootmem.h>
#include <linux/inotify.h>
#include <linux/mount.h>
/*
* This is needed for the following functions:
@ -1189,14 +1190,22 @@ void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
struct inode *inode = dentry->d_inode;
struct timespec now;
/* per-mountpoint checks will go here */
if (IS_NOATIME(inode))
return;
if (IS_NODIRATIME(inode) && S_ISDIR(inode->i_mode))
return;
if (IS_RDONLY(inode))
return;
if ((inode->i_flags & S_NOATIME) ||
(inode->i_sb->s_flags & MS_NOATIME) ||
((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
return;
/*
* We may have a NULL vfsmount when coming from NFSD
*/
if (mnt &&
((mnt->mnt_flags & MNT_NOATIME) ||
((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))))
return;
now = current_fs_time(inode->i_sb);
if (!timespec_equal(&inode->i_atime, &now)) {
inode->i_atime = now;