ovl: rename is_merge to is_lowest

commit 56656e960b555cb98bc414382566dcb59aae99a2 upstream.

The 'is_merge' is an historical naming from when only a single lower layer
could exist.  With the introduction of multiple lower layers the meaning of
this flag was changed to mean only the "lowest layer" (while all lower
layers were being merged).

So now 'is_merge' is inaccurate and hence renaming to 'is_lowest'

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: SZ Lin (林上智) <sz.lin@moxa.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[sw0312.kim: cherry-pick linux-4.4.y commit 6586f61ab5bb to fix smack deny issue on overlayfs]
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Change-Id: I00655e4e8286d2d0e16b61e6d11e559c60ec4036

diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
index 0c59955c46533379f28ae625cfc1531afd84c180..42f2612bfd98b6c98c4bdf7f7058a71dcc3a7a6b 100644 (file)
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -36,7 +36,7 @@ struct ovl_dir_cache {
 
 struct ovl_readdir_data {
        struct dir_context ctx;
-       bool is_merge;
+       bool is_lowest;
        struct rb_root root;
        struct list_head *list;
        struct list_head middle;
@@ -140,9 +140,9 @@ static int ovl_cache_entry_add_rb(struct ovl_readdir_data *rdd,
        return 0;
 }
 
-static int ovl_fill_lower(struct ovl_readdir_data *rdd,
-                         const char *name, int namelen,
-                         loff_t offset, u64 ino, unsigned int d_type)
+static int ovl_fill_lowest(struct ovl_readdir_data *rdd,
+                          const char *name, int namelen,
+                          loff_t offset, u64 ino, unsigned int d_type)
 {
        struct ovl_cache_entry *p;
 
@@ -194,10 +194,10 @@ static int ovl_fill_merge(struct dir_context *ctx, const char *name,
                container_of(ctx, struct ovl_readdir_data, ctx);
 
        rdd->count++;
-       if (!rdd->is_merge)
+       if (!rdd->is_lowest)
                return ovl_cache_entry_add_rb(rdd, name, namelen, ino, d_type);
        else
-               return ovl_fill_lower(rdd, name, namelen, offset, ino, d_type);
+               return ovl_fill_lowest(rdd, name, namelen, offset, ino, d_type);
 }
 
 static int ovl_check_whiteouts(struct dentry *dir, struct ovl_readdir_data *rdd)
@@ -290,7 +290,7 @@ static int ovl_dir_read_merged(struct dentry *dentry, struct list_head *list)
                .ctx.actor = ovl_fill_merge,
                .list = list,
                .root = RB_ROOT,
-               .is_merge = false,
+               .is_lowest = false,
        };
        int idx, next;
 
@@ -307,7 +307,7 @@ static int ovl_dir_read_merged(struct dentry *dentry, struct list_head *list)
                         * allows offsets to be reasonably constant
                         */
                        list_add(&rdd.middle, rdd.list);
-                       rdd.is_merge = true;
+                       rdd.is_lowest = true;
                        err = ovl_dir_read(&realpath, &rdd);
                        list_del(&rdd.middle);
                }