e2fsprogs: mke2fs: create special file

The do_mknod_internal() is used for creating special file which is
block, character and fifo, most of the code are from debugfs/debugfs.c,
the debugfs/debugfs.c will be modified to use this function.

[YOCTO #4083]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs/0003-misc-create_inode.c-create-special-file.patch b/meta/recipes-devtools/e2fsprogs/e2fsprogs/0003-misc-create_inode.c-create-special-file.patch
new file mode 100644 (file)
index 0000000..3847b6e
--- /dev/null
+++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs/0003-misc-create_inode.c-create-special-file.patch
@@ -0,0 +1,103 @@
+From ae7d33823bfc330e08b25c5fe4d25838ef7c77ce Mon Sep 17 00:00:00 2001
+From: Robert Yang <liezhi.yang@windriver.com>
+Date: Mon, 23 Dec 2013 03:13:28 -0500
+Subject: [PATCH 03/11] misc/create_inode.c: create special file
+
+The do_mknod_internal() is used for creating special file which is
+block, character and fifo, most of the code are from debugfs/debugfs.c,
+the debugfs/debugfs.c will be modified to use this function.
+
+Upstream-Status: Backport
+
+Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
+Reviewed-by: Darren Hart <dvhart@linux.intel.com>
+---
+ misc/create_inode.c |   72 +++++++++++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 72 insertions(+)
+
+diff --git a/misc/create_inode.c b/misc/create_inode.c
+index b68b910..4da8aff 100644
+--- a/misc/create_inode.c
++++ b/misc/create_inode.c
+@@ -11,6 +11,78 @@
+ /* Make a special file which is block, character and fifo */
+ errcode_t do_mknod_internal(ext2_ino_t cwd, const char *name, struct stat *st)
+ {
++      ext2_ino_t              ino;
++      errcode_t               retval;
++      struct ext2_inode       inode;
++      unsigned long           major, minor, mode;
++      int                     filetype;
++
++      switch(st->st_mode & S_IFMT) {
++              case S_IFCHR:
++                      mode = LINUX_S_IFCHR;
++                      filetype = EXT2_FT_CHRDEV;
++                      break;
++              case S_IFBLK:
++                      mode = LINUX_S_IFBLK;
++                      filetype =  EXT2_FT_BLKDEV;
++                      break;
++              case S_IFIFO:
++                      mode = LINUX_S_IFIFO;
++                      filetype = EXT2_FT_FIFO;
++                      break;
++      }
++
++      if (!(current_fs->flags & EXT2_FLAG_RW)) {
++              com_err(__func__, 0, "Filesystem opened read/only");
++              return -1;
++      }
++      retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &ino);
++      if (retval) {
++              com_err(__func__, retval, 0);
++              return retval;
++      }
++
++#ifdef DEBUGFS
++      printf("Allocated inode: %u\n", ino);
++#endif
++      retval = ext2fs_link(current_fs, cwd, name, ino, filetype);
++      if (retval == EXT2_ET_DIR_NO_SPACE) {
++              retval = ext2fs_expand_dir(current_fs, cwd);
++              if (retval) {
++                      com_err(__func__, retval, "while expanding directory");
++                      return retval;
++              }
++              retval = ext2fs_link(current_fs, cwd, name, ino, filetype);
++      }
++      if (retval) {
++              com_err(name, retval, 0);
++              return -1;
++      }
++        if (ext2fs_test_inode_bitmap2(current_fs->inode_map, ino))
++              com_err(__func__, 0, "Warning: inode already set");
++      ext2fs_inode_alloc_stats2(current_fs, ino, +1, 0);
++      memset(&inode, 0, sizeof(inode));
++      inode.i_mode = mode;
++      inode.i_atime = inode.i_ctime = inode.i_mtime =
++              current_fs->now ? current_fs->now : time(0);
++
++      major = major(st->st_rdev);
++      minor = minor(st->st_rdev);
++
++      if ((major < 256) && (minor < 256)) {
++              inode.i_block[0] = major * 256 + minor;
++              inode.i_block[1] = 0;
++      } else {
++              inode.i_block[0] = 0;
++              inode.i_block[1] = (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
++      }
++      inode.i_links_count = 1;
++
++      retval = ext2fs_write_new_inode(current_fs, ino, &inode);
++      if (retval)
++              com_err(__func__, retval, "while creating inode %u", ino);
++
++      return retval;
+ }
+ 
+ /* Make a symlink name -> target */
+-- 
+1.7.10.4
+