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authorRussell King <rmk+kernel@armlinux.org.uk>2019-12-09 11:10:52 +0000
committerAl Viro <viro@zeniv.linux.org.uk>2020-01-20 20:12:42 -0500
commit0db35a02a1c3f3abdfac9d56c1cee2fe23b66987 (patch)
tree6ec9c442d456569cc22860b4796ce22606c1433b /fs/adfs
parentaacc954c1be8910a994e09a8f8757a2e3e231c37 (diff)
fs/adfs: bigdir: factor out directory entry offset calculation
Factor out the directory entry byte offset calculation. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/adfs')
-rw-r--r--fs/adfs/dir_fplus.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/adfs/dir_fplus.c b/fs/adfs/dir_fplus.c
index 6f2dbcf6819b..393921f5121e 100644
--- a/fs/adfs/dir_fplus.c
+++ b/fs/adfs/dir_fplus.c
@@ -7,6 +7,15 @@
#include "adfs.h"
#include "dir_fplus.h"
+/* Return the byte offset to directory entry pos */
+static unsigned int adfs_fplus_offset(const struct adfs_bigdirheader *h,
+ unsigned int pos)
+{
+ return offsetof(struct adfs_bigdirheader, bigdirname) +
+ ALIGN(le32_to_cpu(h->bigdirnamelen), 4) +
+ pos * sizeof(struct adfs_bigdirentry);
+}
+
static int adfs_fplus_read(struct super_block *sb, u32 indaddr,
unsigned int size, struct adfs_dir *dir)
{
@@ -83,9 +92,7 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
if (dir->pos >= le32_to_cpu(h->bigdirentries))
return -ENOENT;
- offset = offsetof(struct adfs_bigdirheader, bigdirname);
- offset += ((le32_to_cpu(h->bigdirnamelen) + 4) & ~3);
- offset += dir->pos * sizeof(struct adfs_bigdirentry);
+ offset = adfs_fplus_offset(h, dir->pos);
ret = adfs_dir_copyfrom(&bde, dir, offset,
sizeof(struct adfs_bigdirentry));
@@ -99,9 +106,7 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
obj->attr = le32_to_cpu(bde.bigdirattr);
obj->name_len = le32_to_cpu(bde.bigdirobnamelen);
- offset = offsetof(struct adfs_bigdirheader, bigdirname);
- offset += ((le32_to_cpu(h->bigdirnamelen) + 4) & ~3);
- offset += le32_to_cpu(h->bigdirentries) * sizeof(struct adfs_bigdirentry);
+ offset = adfs_fplus_offset(h, le32_to_cpu(h->bigdirentries));
offset += le32_to_cpu(bde.bigdirobnameptr);
ret = adfs_dir_copyfrom(obj->name, dir, offset, obj->name_len);