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SubjectRe: Important for fs devs: rcu-walk merged upstream
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On Tue, 11 Jan 2011, Nick Piggin wrote:
> On Saturday, 8 January 2011, Marco Stornelli <marco.stornelli@gmail.com> wrote:
> > Il 08/01/2011 03:54, Nick Piggin ha scritto:
> >> The vfs-scale branch is now upstream. If you haven't
> >> looked yet, your filesystem is likely to have been
> >> touched, so check it out.
> >>
> >> Also look at Documentation/filesystems/porting and
> >> path-lookup.txt.
> >
> > Nick, in the porting file I read:
> >
> > ..........hazards on dentries and inodes (see
> > Documentation/filesystems/path-walk.txt). ..........
> >  ^^^^^^^^^^^^^
> >
> > Should it be "path-lookup.txt"?
> >
> > Marco
> >
>
> Hi, yes thanks I'll fix it

Also you use IPERM_RCU instead of IPERM_FLAG_RCU in the documentation.

Thanks,
Miklos


diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 07a32b4..c2819ee 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -383,5 +383,5 @@ Documentation/filesystems/vfs.txt for more details.

permission and check_acl are inode permission checks that are called
on many or all directory inodes on the way down a path walk (to check for
-exec permission). These must now be rcu-walk aware (flags & IPERM_RCU). See
-Documentation/filesystems/vfs.txt for more details.
+exec permission). These must now be rcu-walk aware (flags & IPERM_FLAG_RCU).
+See Documentation/filesystems/vfs.txt for more details.
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index fbb324e..de8a967 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -415,9 +415,9 @@ otherwise noted.
permission: called by the VFS to check for access rights on a POSIX-like
filesystem.

- May be called in rcu-walk mode (flags & IPERM_RCU). If in rcu-walk
- mode, the filesystem must check the permission without blocking or
- storing to the inode.
+ May be called in rcu-walk mode (flags & IPERM_FLAG_RCU). If in
+ rcu-walk mode, the filesystem must check the permission without
+ blocking or storing to the inode.

If a situation is encountered that rcu-walk cannot handle, return
-ECHILD and it will be called again in ref-walk mode.
5B5B
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