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-rw-r--r--Documentation/filesystems/vfs.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index cae6d27c9f5..726a4f6fa3c 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -864,6 +864,7 @@ 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 *);
};
d_revalidate: called when the VFS needs to revalidate a dentry. This
@@ -930,6 +931,19 @@ 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, mount it on the directory
+ 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 automount failed, then an error code
+ should be returned.
+
+ 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.
+
Example :
static char *pipefs_dname(struct dentry *dent, char *buffer, int buflen)