Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 1 | /* |
| 2 | * dupfs.c --- duplicate a ext2 filesystem handle |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 3 | * |
Theodore Ts'o | bc1b803 | 2005-01-05 03:16:09 -0500 | [diff] [blame] | 4 | * Copyright (C) 1997, 1998, 2001, 2003, 2005 by Theodore Ts'o. |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 5 | * |
| 6 | * %Begin-Header% |
Theodore Ts'o | 543547a | 2010-05-17 21:31:56 -0400 | [diff] [blame] | 7 | * This file may be redistributed under the terms of the GNU Library |
| 8 | * General Public License, version 2. |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 9 | * %End-Header% |
| 10 | */ |
| 11 | |
Theodore Ts'o | d1154eb | 2011-09-18 17:34:37 -0400 | [diff] [blame] | 12 | #include "config.h" |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 13 | #include <stdio.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 14 | #if HAVE_UNISTD_H |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 15 | #include <unistd.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 16 | #endif |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 17 | #include <time.h> |
| 18 | #include <string.h> |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 19 | |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 20 | #include "ext2_fs.h" |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 21 | #include "ext2fsP.h" |
| 22 | |
| 23 | errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest) |
| 24 | { |
| 25 | ext2_filsys fs; |
| 26 | errcode_t retval; |
| 27 | |
| 28 | EXT2_CHECK_MAGIC(src, EXT2_ET_MAGIC_EXT2FS_FILSYS); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 29 | |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 30 | retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs); |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 31 | if (retval) |
| 32 | return retval; |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 33 | |
| 34 | *fs = *src; |
| 35 | fs->device_name = 0; |
| 36 | fs->super = 0; |
Theodore Ts'o | bc1b803 | 2005-01-05 03:16:09 -0500 | [diff] [blame] | 37 | fs->orig_super = 0; |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 38 | fs->group_desc = 0; |
| 39 | fs->inode_map = 0; |
| 40 | fs->block_map = 0; |
| 41 | fs->badblocks = 0; |
| 42 | fs->dblist = 0; |
Darrick J. Wong | 816d2c9 | 2013-09-09 10:39:29 -0400 | [diff] [blame] | 43 | fs->mmp_buf = 0; |
| 44 | fs->mmp_cmp = 0; |
| 45 | fs->mmp_fd = -1; |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 46 | |
| 47 | io_channel_bumpcount(fs->io); |
| 48 | if (fs->icache) |
| 49 | fs->icache->refcount++; |
| 50 | |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 51 | retval = ext2fs_get_mem(strlen(src->device_name)+1, &fs->device_name); |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 52 | if (retval) |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 53 | goto errout; |
| 54 | strcpy(fs->device_name, src->device_name); |
| 55 | |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 56 | retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super); |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 57 | if (retval) |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 58 | goto errout; |
| 59 | memcpy(fs->super, src->super, SUPERBLOCK_SIZE); |
| 60 | |
Theodore Ts'o | bc1b803 | 2005-01-05 03:16:09 -0500 | [diff] [blame] | 61 | retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super); |
| 62 | if (retval) |
| 63 | goto errout; |
| 64 | memcpy(fs->orig_super, src->orig_super, SUPERBLOCK_SIZE); |
| 65 | |
Theodore Ts'o | ee01079 | 2007-11-09 19:01:06 -0500 | [diff] [blame] | 66 | retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize, |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 67 | &fs->group_desc); |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 68 | if (retval) |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 69 | goto errout; |
| 70 | memcpy(fs->group_desc, src->group_desc, |
Theodore Ts'o | 3cb6c50 | 1997-08-11 20:29:22 +0000 | [diff] [blame] | 71 | (size_t) fs->desc_blocks * fs->blocksize); |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 72 | |
| 73 | if (src->inode_map) { |
| 74 | retval = ext2fs_copy_bitmap(src->inode_map, &fs->inode_map); |
| 75 | if (retval) |
| 76 | goto errout; |
| 77 | } |
| 78 | if (src->block_map) { |
| 79 | retval = ext2fs_copy_bitmap(src->block_map, &fs->block_map); |
| 80 | if (retval) |
| 81 | goto errout; |
| 82 | } |
| 83 | if (src->badblocks) { |
| 84 | retval = ext2fs_badblocks_copy(src->badblocks, &fs->badblocks); |
| 85 | if (retval) |
| 86 | goto errout; |
| 87 | } |
| 88 | if (src->dblist) { |
| 89 | retval = ext2fs_copy_dblist(src->dblist, &fs->dblist); |
| 90 | if (retval) |
| 91 | goto errout; |
| 92 | } |
Darrick J. Wong | 816d2c9 | 2013-09-09 10:39:29 -0400 | [diff] [blame] | 93 | if (src->mmp_buf) { |
| 94 | retval = ext2fs_get_mem(src->blocksize, &fs->mmp_buf); |
| 95 | if (retval) |
| 96 | goto errout; |
| 97 | memcpy(fs->mmp_buf, src->mmp_buf, src->blocksize); |
| 98 | } |
| 99 | if (src->mmp_fd >= 0) { |
| 100 | fs->mmp_fd = dup(src->mmp_fd); |
| 101 | if (fs->mmp_fd < 0) { |
| 102 | retval = EXT2_ET_MMP_OPEN_DIRECT; |
| 103 | goto errout; |
| 104 | } |
| 105 | } |
| 106 | if (src->mmp_cmp) { |
| 107 | int align = ext2fs_get_dio_alignment(src->mmp_fd); |
| 108 | |
| 109 | retval = ext2fs_get_memalign(src->blocksize, align, |
| 110 | &fs->mmp_cmp); |
| 111 | if (retval) |
| 112 | goto errout; |
| 113 | memcpy(fs->mmp_cmp, src->mmp_cmp, src->blocksize); |
| 114 | } |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 115 | *dest = fs; |
| 116 | return 0; |
| 117 | errout: |
| 118 | ext2fs_free(fs); |
| 119 | return retval; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 120 | |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 121 | } |
| 122 | |