ASoC: McBSP: get hw params from McBSP driver

[pandora-kernel.git] / Documentation / filesystems / vfs.txt

diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index cae6d27..94cf97b 100644 (file)
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -864,6 +864,8 @@ struct dentry_operations {
        void (*d_release)(struct dentry *);
        void (*d_iput)(struct dentry *, struct inode *);
        char *(*d_dname)(struct dentry *, char *, int);
+       struct vfsmount *(*d_automount)(struct path *);
+       int (*d_manage)(struct dentry *, bool, bool);
 };
 
   d_revalidate: called when the VFS needs to revalidate a dentry. This
@@ -930,6 +932,47 @@ struct dentry_operations {
        at the end of the buffer, and returns a pointer to the first char.
        dynamic_dname() helper function is provided to take care of this.
 
+  d_automount: called when an automount dentry is to be traversed (optional).
+       This should create a new VFS mount record and return the record to the
+       caller.  The caller is supplied with a path parameter giving the
+       automount directory to describe the automount target and the parent
+       VFS mount record to provide inheritable mount parameters.  NULL should
+       be returned if someone else managed to make the automount first.  If
+       the vfsmount creation failed, then an error code should be returned.
+       If -EISDIR is returned, then the directory will be treated as an
+       ordinary directory and returned to pathwalk to continue walking.
+
+       If a vfsmount is returned, the caller will attempt to mount it on the
+       mountpoint and will remove the vfsmount from its expiration list in
+       the case of failure.  The vfsmount should be returned with 2 refs on
+       it to prevent automatic expiration - the caller will clean up the
+       additional ref.
+
+       This function is only used if DCACHE_NEED_AUTOMOUNT is set on the
+       dentry.  This is set by __d_instantiate() if S_AUTOMOUNT is set on the
+       inode being added.
+
+  d_manage: called to allow the filesystem to manage the transition from a
+       dentry (optional).  This allows autofs, for example, to hold up clients
+       waiting to explore behind a 'mountpoint' whilst letting the daemon go
+       past and construct the subtree there.  0 should be returned to let the
+       calling process continue.  -EISDIR can be returned to tell pathwalk to
+       use this directory as an ordinary directory and to ignore anything
+       mounted on it and not to check the automount flag.  Any other error
+       code will abort pathwalk completely.
+
+       If the 'mounting_here' parameter is true, then namespace_sem is being
+       held by the caller and the function should not initiate any mounts or
+       unmounts that it will then wait for.
+
+       If the 'rcu_walk' parameter is true, then the caller is doing a
+       pathwalk in RCU-walk mode.  Sleeping is not permitted in this mode,
+       and the caller can be asked to leave it and call again by returing
+       -ECHILD.
+
+       This function is only used if DCACHE_MANAGE_TRANSIT is set on the
+       dentry being transited from.
+
 Example :
 
 static char *pipefs_dname(struct dentry *dent, char *buffer, int buflen)