From: Robert Yang Subject: [RFC 05/10] misc/util.c: copy regular file Date: Wed, 28 Aug 2013 13:25:55 +0800 Message-ID: <1377667560-20089-6-git-send-email-liezhi.yang@windriver.com> References: <1377667560-20089-1-git-send-email-liezhi.yang@windriver.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , To: Return-path: Received: from mail.windriver.com ([147.11.1.11]:63290 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754393Ab3H1Fam (ORCPT ); Wed, 28 Aug 2013 01:30:42 -0400 In-Reply-To: <1377667560-20089-1-git-send-email-liezhi.yang@windriver.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: The do_write_internal() is used for copying file from native fs to target, most of the code are from debugfs/debugfs.c, the debugfs/debugfs.c will be modified to use this function. NOTE: It needs further more work which is merging the sparse copy patch. Signed-off-by: Robert Yang --- misc/util.c | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) diff --git a/misc/util.c b/misc/util.c index f6ae7ca..e35fd88 100644 --- a/misc/util.c +++ b/misc/util.c @@ -428,6 +428,46 @@ try_again: } +static errcode_t copy_file(int fd, ext2_ino_t ino) +{ + ext2_file_t e2_file; + errcode_t retval; + int got; + unsigned int written; + char buf[8192]; + char *ptr; + + retval = ext2fs_file_open(current_fs, ino, EXT2_FILE_WRITE, &e2_file); + if (retval) + return retval; + + while (1) { + got = read(fd, buf, sizeof(buf)); + if (got == 0) + break; + if (got < 0) { + retval = errno; + goto fail; + } + ptr = buf; + while (got > 0) { + retval = ext2fs_file_write(e2_file, ptr, + got, &written); + if (retval) + goto fail; + + got -= written; + ptr += written; + } + } + retval = ext2fs_file_close(e2_file); + return retval; + +fail: + (void) ext2fs_file_close(e2_file); + return retval; +} + /* Make a directory in the fs */ errcode_t do_mkdir_internal(ext2_ino_t cwd, const char *name, struct stat *st) { @@ -436,6 +476,91 @@ errcode_t do_mkdir_internal(ext2_ino_t cwd, const char *name, struct stat *st) /* Copy the native file to the fs */ errcode_t do_write_internal(ext2_ino_t cwd, const char *src, const char *dest) { + int fd; + struct stat statbuf; + ext2_ino_t ino; + errcode_t retval; + struct ext2_inode inode; + char *func_name = "do_write_internal"; + int hdlink; + + fd = open(src, O_RDONLY); + if (fd < 0) { + com_err(src, errno, 0); + return errno; + } + if (fstat(fd, &statbuf) < 0) { + com_err(src, errno, 0); + close(fd); + return errno; + } + + retval = ext2fs_namei(current_fs, root, cwd, dest, &ino); + if (retval == 0) { + com_err(func_name, 0, "The file '%s' already exists\n", dest); + close(fd); + return errno; + } + + retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &ino); + if (retval) { + com_err(func_name, retval, 0); + close(fd); + return errno; + } + printf("Allocated inode: %u\n", ino); + retval = ext2fs_link(current_fs, cwd, dest, ino, EXT2_FT_REG_FILE); + if (retval == EXT2_ET_DIR_NO_SPACE) { + retval = ext2fs_expand_dir(current_fs, cwd); + if (retval) { + com_err(func_name, retval, "while expanding directory"); + close(fd); + return errno; + } + retval = ext2fs_link(current_fs, cwd, dest, ino, EXT2_FT_REG_FILE); + } + if (retval) { + com_err(dest, retval, 0); + close(fd); + return errno; + } + if (ext2fs_test_inode_bitmap2(current_fs->inode_map, ino)) + com_err(func_name, 0, "Warning: inode already set"); + ext2fs_inode_alloc_stats2(current_fs, ino, +1, 0); + memset(&inode, 0, sizeof(inode)); + inode.i_mode = (statbuf.st_mode & ~LINUX_S_IFMT) | LINUX_S_IFREG; + inode.i_atime = inode.i_ctime = inode.i_mtime = + current_fs->now ? current_fs->now : time(0); + inode.i_links_count = 1; + inode.i_size = statbuf.st_size; + if (current_fs->super->s_feature_incompat & + EXT3_FEATURE_INCOMPAT_EXTENTS) { + int i; + struct ext3_extent_header *eh; + + eh = (struct ext3_extent_header *) &inode.i_block[0]; + eh->eh_depth = 0; + eh->eh_entries = 0; + eh->eh_magic = EXT3_EXT_MAGIC; + i = (sizeof(inode.i_block) - sizeof(*eh)) / + sizeof(struct ext3_extent); + eh->eh_max = ext2fs_cpu_to_le16(i); + inode.i_flags |= EXT4_EXTENTS_FL; + } + + if ((retval = ext2fs_write_new_inode(current_fs, ino, &inode))) { + com_err(func_name, retval, "while creating inode %u", ino); + close(fd); + return errno; + } + if (LINUX_S_ISREG(inode.i_mode)) { + retval = copy_file(fd, ino); + if (retval) + com_err("copy_file", retval, 0); + } + close(fd); + + return 0; } /* Copy files from source_dir to fs */ -- 1.8.1.2