[JFFS2] Track parent inode for directories (for NFS export)

To support NFS export, we need to know the parent inode of directories.
Rather than growing the jffs2_inode_cache structure, share space with
the nlink field -- which was always set to 1 for directories anyway.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 6 insertions, 5 deletions

diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c
index 87891bdd7915..ca29440e9435 100644
--- a/fs/jffs2/write.c
+++ b/fs/jffs2/write.c
@@ -19,7 +19,8 @@
 #include "compr.h"
 
 
-int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri)
+int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
+                       uint32_t mode, struct jffs2_raw_inode *ri)
 {
         struct jffs2_inode_cache *ic;
 
@@ -31,7 +32,7 @@ int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint
         memset(ic, 0, sizeof(*ic));
 
         f->inocache = ic;
-        f->inocache->nlink = 1;
+        f->inocache->pino_nlink = 1; /* Will be overwritten shortly for directories */
         f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache;
         f->inocache->state = INO_STATE_PRESENT;
 
@@ -635,9 +636,9 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
                                         jffs2_mark_node_obsolete(c, fd->raw);
                                 jffs2_free_full_dirent(fd);
                         }
-                }
-
-                dead_f->inocache->nlink--;
+                        dead_f->inocache->pino_nlink = 0;
+                } else
+                        dead_f->inocache->pino_nlink--;
                 /* NB: Caller must set inode nlink if appropriate */
                 mutex_unlock(&dead_f->sem);
         }