1 files changed, 86 insertions, 0 deletions

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 320ffef11574..0747339011c3 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -19,6 +19,8 @@
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 #include <linux/sched.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
 #include "internal.h"
 
 struct afs_iget_data {
@@ -102,6 +104,16 @@ static int afs_iget5_test(struct inode *inode, void *opaque)
 }
 
 /*
+ * iget5() comparator for inode created by autocell operations
+ *
+ * These pseudo inodes don't match anything.
+ */
+static int afs_iget5_autocell_test(struct inode *inode, void *opaque)
+{
+        return 0;
+}
+
+/*
  * iget5() inode initialiser
  */
 static int afs_iget5_set(struct inode *inode, void *opaque)
@@ -118,6 +130,67 @@ static int afs_iget5_set(struct inode *inode, void *opaque)
 }
 
 /*
+ * inode retrieval for autocell
+ */
+struct inode *afs_iget_autocell(struct inode *dir, const char *dev_name,
+                                int namesz, struct key *key)
+{
+        struct afs_iget_data data;
+        struct afs_super_info *as;
+        struct afs_vnode *vnode;
+        struct super_block *sb;
+        struct inode *inode;
+        static atomic_t afs_autocell_ino;
+
+        _enter("{%x:%u},%*.*s,",
+               AFS_FS_I(dir)->fid.vid, AFS_FS_I(dir)->fid.vnode,
+               namesz, namesz, dev_name ?: "");
+
+        sb = dir->i_sb;
+        as = sb->s_fs_info;
+        data.volume = as->volume;
+        data.fid.vid = as->volume->vid;
+        data.fid.unique = 0;
+        data.fid.vnode = 0;
+
+        inode = iget5_locked(sb, atomic_inc_return(&afs_autocell_ino),
+                             afs_iget5_autocell_test, afs_iget5_set,
+                             &data);
+        if (!inode) {
+                _leave(" = -ENOMEM");
+                return ERR_PTR(-ENOMEM);
+        }
+
+        _debug("GOT INODE %p { ino=%lu, vl=%x, vn=%x, u=%x }",
+               inode, inode->i_ino, data.fid.vid, data.fid.vnode,
+               data.fid.unique);
+
+        vnode = AFS_FS_I(inode);
+
+        /* there shouldn't be an existing inode */
+        BUG_ON(!(inode->i_state & I_NEW));
+
+        inode->i_size           = 0;
+        inode->i_mode           = S_IFDIR | S_IRUGO | S_IXUGO;
+        inode->i_op             = &afs_autocell_inode_operations;
+        inode->i_nlink          = 2;
+        inode->i_uid            = 0;
+        inode->i_gid            = 0;
+        inode->i_ctime.tv_sec   = get_seconds();
+        inode->i_ctime.tv_nsec  = 0;
+        inode->i_atime          = inode->i_mtime = inode->i_ctime;
+        inode->i_blocks         = 0;
+        inode->i_version        = 0;
+        inode->i_generation     = 0;
+
+        set_bit(AFS_VNODE_PSEUDODIR, &vnode->flags);
+        inode->i_flags |= S_NOATIME;
+        unlock_new_inode(inode);
+        _leave(" = %p", inode);
+        return inode;
+}
+
+/*
  * inode retrieval
  */
 struct inode *afs_iget(struct super_block *sb, struct key *key,
@@ -314,6 +387,19 @@ int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 }
 
 /*
+ * discard an AFS inode
+ */
+int afs_drop_inode(struct inode *inode)
+{
+        _enter("");
+
+        if (test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(inode)->flags))
+                return generic_delete_inode(inode);
+        else
+                return generic_drop_inode(inode);
+}
+
+/*
  * clear an AFS inode
  */
 void afs_evict_inode(struct inode *inode)