[src/trunk]: src/sys/lib/libsa Sync with sys/ufs/ext2fs/ext2fs_bswap.c.

[nonaka <nonaka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/510c255ab904
branches:  trunk
changeset: 346817:510c255ab904
user:      nonaka <nonaka%NetBSD.org@localhost>
date:      Thu Aug 04 06:58:41 2016 +0000

description:
Sync with sys/ufs/ext2fs/ext2fs_bswap.c.

diffstat:

 sys/lib/libsa/ext2fs.c |  43 ++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 38 insertions(+), 5 deletions(-)

diffs (69 lines):

diff -r 4dbc7dcd123d -r 510c255ab904 sys/lib/libsa/ext2fs.c
--- a/sys/lib/libsa/ext2fs.c    Thu Aug 04 06:54:47 2016 +0000
+++ b/sys/lib/libsa/ext2fs.c    Thu Aug 04 06:58:41 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ext2fs.c,v 1.22 2016/08/04 03:16:00 nonaka Exp $       */
+/*     $NetBSD: ext2fs.c,v 1.23 2016/08/04 06:58:41 nonaka Exp $       */
 
 /*
  * Copyright (c) 1997 Manuel Bouyer.
@@ -939,9 +939,13 @@
        }
 }
 
-void e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new)
+void e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new,
+    size_t isize)
 {
+       /* preserve non-swapped and unused fields */
+       memcpy(new, old, isize);
 
+       /* swap what needs to be swapped */
        new->e2di_mode          =       bswap16(old->e2di_mode);
        new->e2di_uid           =       bswap16(old->e2di_uid);
        new->e2di_gid           =       bswap16(old->e2di_gid);
@@ -953,12 +957,41 @@
        new->e2di_dtime         =       bswap32(old->e2di_dtime);
        new->e2di_nblock        =       bswap32(old->e2di_nblock);
        new->e2di_flags         =       bswap32(old->e2di_flags);
+       new->e2di_version       =       bswap32(old->e2di_version);
        new->e2di_gen           =       bswap32(old->e2di_gen);
        new->e2di_facl          =       bswap32(old->e2di_facl);
        new->e2di_dacl          =       bswap32(old->e2di_dacl);
-       new->e2di_obso_faddr    =       bswap32(old->e2di_obso_faddr);
-       memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
-           (EXT2FS_NDADDR + EXT2FS_NIADDR) * sizeof(uint32_t));
+       new->e2di_nblock_high   =       bswap16(old->e2di_nblock_high);
+       new->e2di_facl_high     =       bswap16(old->e2di_facl_high);
+       new->e2di_uid_high      =       bswap16(old->e2di_uid_high);
+       new->e2di_gid_high      =       bswap16(old->e2di_gid_high);
+       new->e2di_checksum_low  =       bswap16(old->e2di_checksum_low);
+
+       /*
+        * Following fields are only supported for inode sizes bigger
+        * than the old ext2 one
+        */
+       if (isize == EXT2_REV0_DINODE_SIZE)
+               return;
+
+       new->e2di_extra_isize   = bswap16(old->e2di_extra_isize);
+       new->e2di_checksum_high = bswap16(old->e2di_checksum_high);
+
+       /* Following fields are ext4, might not be actually present */
+       if (EXT2_DINODE_FITS(new, e2di_ctime_extra, isize))
+               new->e2di_ctime_extra   = bswap32(old->e2di_ctime_extra);
+       if (EXT2_DINODE_FITS(new, e2di_mtime_extra, isize))
+               new->e2di_mtime_extra   = bswap32(old->e2di_mtime_extra);
+       if (EXT2_DINODE_FITS(new, e2di_atime_extra, isize))
+               new->e2di_atime_extra   = bswap32(old->e2di_atime_extra);
+       if (EXT2_DINODE_FITS(new, e2di_crtime, isize))
+               new->e2di_crtime        = bswap32(old->e2di_crtime);
+       if (EXT2_DINODE_FITS(new, e2di_crtime_extra, isize))
+               new->e2di_crtime_extra  = bswap32(old->e2di_crtime_extra);
+       if (EXT2_DINODE_FITS(new, e2di_version_high, isize))
+               new->e2di_version_high  = bswap32(old->e2di_version_high);
+       if (EXT2_DINODE_FITS(new, e2di_projid, isize))
+               new->e2di_projid        = bswap32(old->e2di_projid);
 }
 #endif