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] (From OE-Core rev: dcb86f12691b346262c0aadbe5b2f3671b4ecd22) 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>
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From ae7d33823bfc330e08b25c5fe4d25838ef7c77ce Mon Sep 17 00:00:00 2001
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From: Robert Yang <liezhi.yang@windriver.com>
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Date: Mon, 23 Dec 2013 03:13:28 -0500
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Subject: [PATCH 03/11] misc/create_inode.c: create special file
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The do_mknod_internal() is used for creating special file which is
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block, character and fifo, most of the code are from debugfs/debugfs.c,
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the debugfs/debugfs.c will be modified to use this function.
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Upstream-Status: Backport
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Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
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Reviewed-by: Darren Hart <dvhart@linux.intel.com>
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---
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misc/create_inode.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 72 insertions(+)
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diff --git a/misc/create_inode.c b/misc/create_inode.c
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index b68b910..4da8aff 100644
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--- a/misc/create_inode.c
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+++ b/misc/create_inode.c
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@@ -11,6 +11,78 @@
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/* Make a special file which is block, character and fifo */
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errcode_t do_mknod_internal(ext2_ino_t cwd, const char *name, struct stat *st)
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{
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+ ext2_ino_t ino;
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+ errcode_t retval;
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+ struct ext2_inode inode;
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+ unsigned long major, minor, mode;
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+ int filetype;
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+
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+ switch(st->st_mode & S_IFMT) {
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+ case S_IFCHR:
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+ mode = LINUX_S_IFCHR;
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+ filetype = EXT2_FT_CHRDEV;
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+ break;
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+ case S_IFBLK:
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+ mode = LINUX_S_IFBLK;
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+ filetype = EXT2_FT_BLKDEV;
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+ break;
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+ case S_IFIFO:
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+ mode = LINUX_S_IFIFO;
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+ filetype = EXT2_FT_FIFO;
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+ break;
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+ }
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+
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+ if (!(current_fs->flags & EXT2_FLAG_RW)) {
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+ com_err(__func__, 0, "Filesystem opened read/only");
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+ return -1;
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+ }
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+ retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &ino);
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+ if (retval) {
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+ com_err(__func__, retval, 0);
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+ return retval;
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+ }
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+
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+#ifdef DEBUGFS
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+ printf("Allocated inode: %u\n", ino);
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+#endif
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+ retval = ext2fs_link(current_fs, cwd, name, ino, filetype);
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+ if (retval == EXT2_ET_DIR_NO_SPACE) {
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+ retval = ext2fs_expand_dir(current_fs, cwd);
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+ if (retval) {
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+ com_err(__func__, retval, "while expanding directory");
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+ return retval;
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+ }
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+ retval = ext2fs_link(current_fs, cwd, name, ino, filetype);
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+ }
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+ if (retval) {
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+ com_err(name, retval, 0);
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+ return -1;
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+ }
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+ if (ext2fs_test_inode_bitmap2(current_fs->inode_map, ino))
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+ com_err(__func__, 0, "Warning: inode already set");
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+ ext2fs_inode_alloc_stats2(current_fs, ino, +1, 0);
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+ memset(&inode, 0, sizeof(inode));
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+ inode.i_mode = mode;
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+ inode.i_atime = inode.i_ctime = inode.i_mtime =
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+ current_fs->now ? current_fs->now : time(0);
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+
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+ major = major(st->st_rdev);
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+ minor = minor(st->st_rdev);
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+
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+ if ((major < 256) && (minor < 256)) {
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+ inode.i_block[0] = major * 256 + minor;
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+ inode.i_block[1] = 0;
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+ } else {
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+ inode.i_block[0] = 0;
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+ inode.i_block[1] = (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
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+ }
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+ inode.i_links_count = 1;
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+
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+ retval = ext2fs_write_new_inode(current_fs, ino, &inode);
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+ if (retval)
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+ com_err(__func__, retval, "while creating inode %u", ino);
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+
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+ return retval;
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}
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/* Make a symlink name -> target */
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--
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1.7.10.4
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