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authorPhillip Lougher <phillip@lougher.demon.co.uk>2011-07-26 06:40:45 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-07-26 20:57:09 +0400
commit5b9f4567726513a359e70f85029482c7c3714dbd (patch)
treea68cb1f3393ee1398d759ea29a327bbdf38521c2
parentbacb2d816c77edefd464d6bcc04c07f92109bd7d (diff)
downloadlinux-5b9f4567726513a359e70f85029482c7c3714dbd.tar.xz
Documentation: Exporting: update description of d_splice_alias
Following commits a904937 and 0c1aa9a update the d_splice_alias desciption. Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--Documentation/filesystems/nfs/Exporting9
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/filesystems/nfs/Exporting b/Documentation/filesystems/nfs/Exporting
index 87019d2b5981..09994c247289 100644
--- a/Documentation/filesystems/nfs/Exporting
+++ b/Documentation/filesystems/nfs/Exporting
@@ -92,7 +92,14 @@ For a filesystem to be exportable it must:
1/ provide the filehandle fragment routines described below.
2/ make sure that d_splice_alias is used rather than d_add
when ->lookup finds an inode for a given parent and name.
- Typically the ->lookup routine will end with a:
+
+ If inode is NULL, d_splice_alias(inode, dentry) is eqivalent to
+
+ d_add(dentry, inode), NULL
+
+ Similarly, d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
+
+ Typically the ->lookup routine will simply end with a:
return d_splice_alias(inode, dentry);
}