Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * inode.c |
| 3 | * |
| 4 | * PURPOSE |
| 5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. |
| 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * COPYRIGHT |
| 8 | * This file is distributed under the terms of the GNU General Public |
| 9 | * License (GPL). Copies of the GPL can be obtained from: |
| 10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL |
| 11 | * Each contributing author retains all rights to their own work. |
| 12 | * |
| 13 | * (C) 1998 Dave Boynton |
| 14 | * (C) 1998-2004 Ben Fennema |
| 15 | * (C) 1999-2000 Stelias Computing Inc |
| 16 | * |
| 17 | * HISTORY |
| 18 | * |
| 19 | * 10/04/98 dgb Added rudimentary directory functions |
| 20 | * 10/07/98 Fully working udf_block_map! It works! |
| 21 | * 11/25/98 bmap altered to better support extents |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 22 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
| 23 | * and udf_read_inode |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
| 25 | * block boundaries (which is not actually allowed) |
| 26 | * 12/20/98 added support for strategy 4096 |
| 27 | * 03/07/99 rewrote udf_block_map (again) |
| 28 | * New funcs, inode_bmap, udf_next_aext |
| 29 | * 04/19/99 Support for writing device EA's for major/minor # |
| 30 | */ |
| 31 | |
| 32 | #include "udfdecl.h" |
| 33 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/module.h> |
| 35 | #include <linux/pagemap.h> |
| 36 | #include <linux/buffer_head.h> |
| 37 | #include <linux/writeback.h> |
| 38 | #include <linux/slab.h> |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 39 | #include <linux/crc-itu-t.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #include "udf_i.h" |
| 42 | #include "udf_sb.h" |
| 43 | |
| 44 | MODULE_AUTHOR("Ben Fennema"); |
| 45 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); |
| 46 | MODULE_LICENSE("GPL"); |
| 47 | |
| 48 | #define EXTENT_MERGE_SIZE 5 |
| 49 | |
| 50 | static mode_t udf_convert_permissions(struct fileEntry *); |
| 51 | static int udf_update_inode(struct inode *, int); |
| 52 | static void udf_fill_inode(struct inode *, struct buffer_head *); |
Jan Kara | 49521de | 2010-10-20 17:42:44 +0200 | [diff] [blame] | 53 | static int udf_sync_inode(struct inode *inode); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 54 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 55 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
Marcin Slusarz | 1ed1617 | 2008-02-08 04:20:48 -0800 | [diff] [blame] | 56 | sector_t *, int *); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 57 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 58 | struct kernel_lb_addr, uint32_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static void udf_split_extents(struct inode *, int *, int, int, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 60 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static void udf_prealloc_extents(struct inode *, int, int, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 62 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | static void udf_merge_extents(struct inode *, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 64 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | static void udf_update_extents(struct inode *, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 66 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 67 | struct extent_position *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
| 69 | |
Christoph Hellwig | b1e3212 | 2008-02-22 12:38:48 +0100 | [diff] [blame] | 70 | |
Al Viro | 3aac2b62 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 71 | void udf_evict_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 73 | struct udf_inode_info *iinfo = UDF_I(inode); |
Al Viro | 3aac2b62 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 74 | int want_delete = 0; |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 75 | |
Al Viro | 3aac2b62 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 76 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
| 77 | want_delete = 1; |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 78 | udf_setsize(inode, 0); |
Al Viro | 3aac2b62 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 79 | udf_update_inode(inode, IS_SYNC(inode)); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 80 | } else |
| 81 | truncate_inode_pages(&inode->i_data, 0); |
Al Viro | 3aac2b62 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 82 | invalidate_inode_buffers(inode); |
| 83 | end_writeback(inode); |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 84 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
| 85 | inode->i_size != iinfo->i_lenExtents) { |
| 86 | printk(KERN_WARNING "UDF-fs (%s): Inode %lu (mode %o) has " |
Daniel Mack | 1537a36 | 2010-01-29 15:57:49 +0800 | [diff] [blame] | 87 | "inode size %llu different from extent length %llu. " |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 88 | "Filesystem need not be standards compliant.\n", |
| 89 | inode->i_sb->s_id, inode->i_ino, inode->i_mode, |
| 90 | (unsigned long long)inode->i_size, |
| 91 | (unsigned long long)iinfo->i_lenExtents); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 93 | kfree(iinfo->i_ext.i_data); |
| 94 | iinfo->i_ext.i_data = NULL; |
Al Viro | 3aac2b62 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 95 | if (want_delete) { |
Al Viro | 3aac2b62 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 96 | udf_free_inode(inode); |
Al Viro | 3aac2b62 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 97 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | static int udf_writepage(struct page *page, struct writeback_control *wbc) |
| 101 | { |
| 102 | return block_write_full_page(page, udf_get_block, wbc); |
| 103 | } |
| 104 | |
| 105 | static int udf_readpage(struct file *file, struct page *page) |
| 106 | { |
| 107 | return block_read_full_page(page, udf_get_block); |
| 108 | } |
| 109 | |
Nick Piggin | be021ee | 2007-10-16 01:25:20 -0700 | [diff] [blame] | 110 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
| 111 | loff_t pos, unsigned len, unsigned flags, |
| 112 | struct page **pagep, void **fsdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | { |
Christoph Hellwig | 155130a | 2010-06-04 11:29:58 +0200 | [diff] [blame] | 114 | int ret; |
| 115 | |
| 116 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); |
| 117 | if (unlikely(ret)) { |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 118 | struct inode *inode = mapping->host; |
| 119 | struct udf_inode_info *iinfo = UDF_I(inode); |
| 120 | loff_t isize = inode->i_size; |
| 121 | |
| 122 | if (pos + len > isize) { |
| 123 | truncate_pagecache(inode, pos + len, isize); |
| 124 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 125 | down_write(&iinfo->i_data_sem); |
| 126 | udf_truncate_extents(inode); |
| 127 | up_write(&iinfo->i_data_sem); |
| 128 | } |
| 129 | } |
Christoph Hellwig | 155130a | 2010-06-04 11:29:58 +0200 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) |
| 136 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 137 | return generic_block_bmap(mapping, block, udf_get_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 140 | const struct address_space_operations udf_aops = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 141 | .readpage = udf_readpage, |
| 142 | .writepage = udf_writepage, |
Nick Piggin | be021ee | 2007-10-16 01:25:20 -0700 | [diff] [blame] | 143 | .write_begin = udf_write_begin, |
| 144 | .write_end = generic_write_end, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 145 | .bmap = udf_bmap, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | }; |
| 147 | |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 148 | int udf_expand_file_adinicb(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
| 150 | struct page *page; |
| 151 | char *kaddr; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 152 | struct udf_inode_info *iinfo = UDF_I(inode); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 153 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | struct writeback_control udf_wbc = { |
| 155 | .sync_mode = WB_SYNC_NONE, |
| 156 | .nr_to_write = 1, |
| 157 | }; |
| 158 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 159 | if (!iinfo->i_lenAlloc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 161 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | else |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 163 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 164 | /* from now on we have normal address_space methods */ |
| 165 | inode->i_data.a_ops = &udf_aops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | mark_inode_dirty(inode); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 167 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 170 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
| 171 | if (!page) |
| 172 | return -ENOMEM; |
Matt Mackall | cd7619d | 2005-05-01 08:59:01 -0700 | [diff] [blame] | 173 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 174 | if (!PageUptodate(page)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | kaddr = kmap(page); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 176 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
| 177 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); |
| 178 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, |
| 179 | iinfo->i_lenAlloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | flush_dcache_page(page); |
| 181 | SetPageUptodate(page); |
| 182 | kunmap(page); |
| 183 | } |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 184 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
| 185 | iinfo->i_lenAlloc); |
| 186 | iinfo->i_lenAlloc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 188 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | else |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 190 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 191 | /* from now on we have normal address_space methods */ |
| 192 | inode->i_data.a_ops = &udf_aops; |
| 193 | err = inode->i_data.a_ops->writepage(page, &udf_wbc); |
| 194 | if (err) { |
| 195 | /* Restore everything back so that we don't lose data... */ |
| 196 | lock_page(page); |
| 197 | kaddr = kmap(page); |
| 198 | memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, |
| 199 | inode->i_size); |
| 200 | kunmap(page); |
| 201 | unlock_page(page); |
| 202 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
| 203 | inode->i_data.a_ops = &udf_adinicb_aops; |
| 204 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | page_cache_release(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | mark_inode_dirty(inode); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 207 | |
| 208 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
| 210 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 211 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
| 212 | int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | { |
| 214 | int newblock; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 215 | struct buffer_head *dbh = NULL; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 216 | struct kernel_lb_addr eloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | uint8_t alloctype; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 218 | struct extent_position epos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | struct udf_fileident_bh sfibh, dfibh; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 221 | loff_t f_pos = udf_ext0_offset(inode); |
| 222 | int size = udf_ext0_offset(inode) + inode->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | struct fileIdentDesc cfi, *sfi, *dfi; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 224 | struct udf_inode_info *iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
| 227 | alloctype = ICBTAG_FLAG_AD_SHORT; |
| 228 | else |
| 229 | alloctype = ICBTAG_FLAG_AD_LONG; |
| 230 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 231 | if (!inode->i_size) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 232 | iinfo->i_alloc_type = alloctype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | mark_inode_dirty(inode); |
| 234 | return NULL; |
| 235 | } |
| 236 | |
| 237 | /* alloc block, and copy data to it */ |
| 238 | *block = udf_new_block(inode->i_sb, inode, |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 239 | iinfo->i_location.partitionReferenceNum, |
| 240 | iinfo->i_location.logicalBlockNum, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if (!(*block)) |
| 242 | return NULL; |
| 243 | newblock = udf_get_pblock(inode->i_sb, *block, |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 244 | iinfo->i_location.partitionReferenceNum, |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 245 | 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (!newblock) |
| 247 | return NULL; |
| 248 | dbh = udf_tgetblk(inode->i_sb, newblock); |
| 249 | if (!dbh) |
| 250 | return NULL; |
| 251 | lock_buffer(dbh); |
| 252 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); |
| 253 | set_buffer_uptodate(dbh); |
| 254 | unlock_buffer(dbh); |
| 255 | mark_buffer_dirty_inode(dbh, inode); |
| 256 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 257 | sfibh.soffset = sfibh.eoffset = |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 258 | f_pos & (inode->i_sb->s_blocksize - 1); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 259 | sfibh.sbh = sfibh.ebh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | dfibh.soffset = dfibh.eoffset = 0; |
| 261 | dfibh.sbh = dfibh.ebh = dbh; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 262 | while (f_pos < size) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 263 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 264 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
| 265 | NULL, NULL, NULL); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 266 | if (!sfi) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 267 | brelse(dbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | return NULL; |
| 269 | } |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 270 | iinfo->i_alloc_type = alloctype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
| 272 | dfibh.soffset = dfibh.eoffset; |
| 273 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); |
| 274 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); |
| 275 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 276 | sfi->fileIdent + |
| 277 | le16_to_cpu(sfi->lengthOfImpUse))) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 278 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 279 | brelse(dbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | return NULL; |
| 281 | } |
| 282 | } |
| 283 | mark_buffer_dirty_inode(dbh, inode); |
| 284 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 285 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
| 286 | iinfo->i_lenAlloc); |
| 287 | iinfo->i_lenAlloc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | eloc.logicalBlockNum = *block; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 289 | eloc.partitionReferenceNum = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 290 | iinfo->i_location.partitionReferenceNum; |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 291 | iinfo->i_lenExtents = inode->i_size; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 292 | epos.bh = NULL; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 293 | epos.block = iinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 294 | epos.offset = udf_file_entry_alloc_offset(inode); |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 295 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | /* UniqueID stuff */ |
| 297 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 298 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | mark_inode_dirty(inode); |
| 300 | return dbh; |
| 301 | } |
| 302 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 303 | static int udf_get_block(struct inode *inode, sector_t block, |
| 304 | struct buffer_head *bh_result, int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | { |
| 306 | int err, new; |
| 307 | struct buffer_head *bh; |
Marcin Slusarz | 1ed1617 | 2008-02-08 04:20:48 -0800 | [diff] [blame] | 308 | sector_t phys = 0; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 309 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 311 | if (!create) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | phys = udf_block_map(inode, block); |
| 313 | if (phys) |
| 314 | map_bh(bh_result, inode->i_sb, phys); |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | err = -EIO; |
| 319 | new = 0; |
| 320 | bh = NULL; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 321 | iinfo = UDF_I(inode); |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 322 | |
| 323 | down_write(&iinfo->i_data_sem); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 324 | if (block == iinfo->i_next_alloc_block + 1) { |
| 325 | iinfo->i_next_alloc_block++; |
| 326 | iinfo->i_next_alloc_goal++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | |
| 329 | err = 0; |
| 330 | |
| 331 | bh = inode_getblk(inode, block, &err, &phys, &new); |
Eric Sesterhenn | 2c2111c | 2006-04-02 13:40:13 +0200 | [diff] [blame] | 332 | BUG_ON(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | if (err) |
| 334 | goto abort; |
Eric Sesterhenn | 2c2111c | 2006-04-02 13:40:13 +0200 | [diff] [blame] | 335 | BUG_ON(!phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | if (new) |
| 338 | set_buffer_new(bh_result); |
| 339 | map_bh(bh_result, inode->i_sb, phys); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 340 | |
| 341 | abort: |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 342 | up_write(&iinfo->i_data_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | } |
| 345 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 346 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
| 347 | int create, int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 349 | struct buffer_head *bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | struct buffer_head dummy; |
| 351 | |
| 352 | dummy.b_state = 0; |
| 353 | dummy.b_blocknr = -1000; |
| 354 | *err = udf_get_block(inode, block, &dummy, create); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 355 | if (!*err && buffer_mapped(&dummy)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 357 | if (buffer_new(&dummy)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | lock_buffer(bh); |
| 359 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); |
| 360 | set_buffer_uptodate(bh); |
| 361 | unlock_buffer(bh); |
| 362 | mark_buffer_dirty_inode(bh, inode); |
| 363 | } |
| 364 | return bh; |
| 365 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | return NULL; |
| 368 | } |
| 369 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 370 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 371 | static int udf_do_extend_file(struct inode *inode, |
| 372 | struct extent_position *last_pos, |
| 373 | struct kernel_long_ad *last_ext, |
| 374 | sector_t blocks) |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 375 | { |
| 376 | sector_t add; |
| 377 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
| 378 | struct super_block *sb = inode->i_sb; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 379 | struct kernel_lb_addr prealloc_loc = {}; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 380 | int prealloc_len = 0; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 381 | struct udf_inode_info *iinfo; |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 382 | int err; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 383 | |
| 384 | /* The previous extent is fake and we should not extend by anything |
| 385 | * - there's nothing to do... */ |
| 386 | if (!blocks && fake) |
| 387 | return 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 388 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 389 | iinfo = UDF_I(inode); |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 390 | /* Round the last extent up to a multiple of block size */ |
| 391 | if (last_ext->extLength & (sb->s_blocksize - 1)) { |
| 392 | last_ext->extLength = |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 393 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
| 394 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + |
| 395 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 396 | iinfo->i_lenExtents = |
| 397 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 398 | ~(sb->s_blocksize - 1); |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 399 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 400 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 401 | /* Last extent are just preallocated blocks? */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 402 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
| 403 | EXT_NOT_RECORDED_ALLOCATED) { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 404 | /* Save the extent so that we can reattach it to the end */ |
| 405 | prealloc_loc = last_ext->extLocation; |
| 406 | prealloc_len = last_ext->extLength; |
| 407 | /* Mark the extent as a hole */ |
| 408 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 409 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 410 | last_ext->extLocation.logicalBlockNum = 0; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 411 | last_ext->extLocation.partitionReferenceNum = 0; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 412 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 413 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 414 | /* Can we merge with the previous extent? */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 415 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
| 416 | EXT_NOT_RECORDED_NOT_ALLOCATED) { |
| 417 | add = ((1 << 30) - sb->s_blocksize - |
| 418 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> |
| 419 | sb->s_blocksize_bits; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 420 | if (add > blocks) |
| 421 | add = blocks; |
| 422 | blocks -= add; |
| 423 | last_ext->extLength += add << sb->s_blocksize_bits; |
| 424 | } |
| 425 | |
| 426 | if (fake) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 427 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 428 | last_ext->extLength, 1); |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 429 | count++; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 430 | } else |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 431 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 432 | last_ext->extLength, 1); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 433 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 434 | /* Managed to do everything necessary? */ |
| 435 | if (!blocks) |
| 436 | goto out; |
| 437 | |
| 438 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ |
| 439 | last_ext->extLocation.logicalBlockNum = 0; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 440 | last_ext->extLocation.partitionReferenceNum = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 441 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 442 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| 443 | (add << sb->s_blocksize_bits); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 444 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 445 | /* Create enough extents to cover the whole hole */ |
| 446 | while (blocks > add) { |
| 447 | blocks -= add; |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 448 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
| 449 | last_ext->extLength, 1); |
| 450 | if (err) |
| 451 | return err; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 452 | count++; |
| 453 | } |
| 454 | if (blocks) { |
| 455 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 456 | (blocks << sb->s_blocksize_bits); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 457 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
| 458 | last_ext->extLength, 1); |
| 459 | if (err) |
| 460 | return err; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 461 | count++; |
| 462 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 463 | |
| 464 | out: |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 465 | /* Do we have some preallocated blocks saved? */ |
| 466 | if (prealloc_len) { |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 467 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
| 468 | prealloc_len, 1); |
| 469 | if (err) |
| 470 | return err; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 471 | last_ext->extLocation = prealloc_loc; |
| 472 | last_ext->extLength = prealloc_len; |
| 473 | count++; |
| 474 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 475 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 476 | /* last_pos should point to the last written extent... */ |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 477 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 478 | last_pos->offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 479 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 480 | last_pos->offset -= sizeof(struct long_ad); |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 481 | else |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 482 | return -EIO; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 483 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 484 | return count; |
| 485 | } |
| 486 | |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 487 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
| 488 | { |
| 489 | |
| 490 | struct extent_position epos; |
| 491 | struct kernel_lb_addr eloc; |
| 492 | uint32_t elen; |
| 493 | int8_t etype; |
| 494 | struct super_block *sb = inode->i_sb; |
| 495 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; |
| 496 | int adsize; |
| 497 | struct udf_inode_info *iinfo = UDF_I(inode); |
| 498 | struct kernel_long_ad extent; |
| 499 | int err; |
| 500 | |
| 501 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| 502 | adsize = sizeof(struct short_ad); |
| 503 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| 504 | adsize = sizeof(struct long_ad); |
| 505 | else |
| 506 | BUG(); |
| 507 | |
| 508 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); |
| 509 | |
| 510 | /* File has extent covering the new size (could happen when extending |
| 511 | * inside a block)? */ |
| 512 | if (etype != -1) |
| 513 | return 0; |
| 514 | if (newsize & (sb->s_blocksize - 1)) |
| 515 | offset++; |
| 516 | /* Extended file just to the boundary of the last file block? */ |
| 517 | if (offset == 0) |
| 518 | return 0; |
| 519 | |
| 520 | /* Truncate is extending the file by 'offset' blocks */ |
| 521 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || |
| 522 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { |
| 523 | /* File has no extents at all or has empty last |
| 524 | * indirect extent! Create a fake extent... */ |
| 525 | extent.extLocation.logicalBlockNum = 0; |
| 526 | extent.extLocation.partitionReferenceNum = 0; |
| 527 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
| 528 | } else { |
| 529 | epos.offset -= adsize; |
| 530 | etype = udf_next_aext(inode, &epos, &extent.extLocation, |
| 531 | &extent.extLength, 0); |
| 532 | extent.extLength |= etype << 30; |
| 533 | } |
| 534 | err = udf_do_extend_file(inode, &epos, &extent, offset); |
| 535 | if (err < 0) |
| 536 | goto out; |
| 537 | err = 0; |
| 538 | iinfo->i_lenExtents = newsize; |
| 539 | out: |
| 540 | brelse(epos.bh); |
| 541 | return err; |
| 542 | } |
| 543 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 544 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
Marcin Slusarz | 1ed1617 | 2008-02-08 04:20:48 -0800 | [diff] [blame] | 545 | int *err, sector_t *phys, int *new) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 547 | static sector_t last_block; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 548 | struct buffer_head *result = NULL; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 549 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 550 | struct extent_position prev_epos, cur_epos, next_epos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | int count = 0, startnum = 0, endnum = 0; |
Jan Kara | 85d7124 | 2007-06-01 00:46:29 -0700 | [diff] [blame] | 552 | uint32_t elen = 0, tmpelen; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 553 | struct kernel_lb_addr eloc, tmpeloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | int c = 1; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 555 | loff_t lbcount = 0, b_off = 0; |
| 556 | uint32_t newblocknum, newblock; |
| 557 | sector_t offset = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | int8_t etype; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 559 | struct udf_inode_info *iinfo = UDF_I(inode); |
| 560 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 561 | int lastblock = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 563 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 564 | prev_epos.block = iinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 565 | prev_epos.bh = NULL; |
| 566 | cur_epos = next_epos = prev_epos; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 567 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | /* find the extent which contains the block we are looking for. |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 570 | alternate between laarr[0] and laarr[1] for locations of the |
| 571 | current extent, and the previous extent */ |
| 572 | do { |
| 573 | if (prev_epos.bh != cur_epos.bh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 574 | brelse(prev_epos.bh); |
| 575 | get_bh(cur_epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 576 | prev_epos.bh = cur_epos.bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 578 | if (cur_epos.bh != next_epos.bh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 579 | brelse(cur_epos.bh); |
| 580 | get_bh(next_epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 581 | cur_epos.bh = next_epos.bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | lbcount += elen; |
| 585 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 586 | prev_epos.block = cur_epos.block; |
| 587 | cur_epos.block = next_epos.block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 589 | prev_epos.offset = cur_epos.offset; |
| 590 | cur_epos.offset = next_epos.offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 592 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
| 593 | if (etype == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | break; |
| 595 | |
| 596 | c = !c; |
| 597 | |
| 598 | laarr[c].extLength = (etype << 30) | elen; |
| 599 | laarr[c].extLocation = eloc; |
| 600 | |
| 601 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) |
| 602 | pgoal = eloc.logicalBlockNum + |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 603 | ((elen + inode->i_sb->s_blocksize - 1) >> |
| 604 | inode->i_sb->s_blocksize_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 606 | count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } while (lbcount + elen <= b_off); |
| 608 | |
| 609 | b_off -= lbcount; |
| 610 | offset = b_off >> inode->i_sb->s_blocksize_bits; |
Jan Kara | 85d7124 | 2007-06-01 00:46:29 -0700 | [diff] [blame] | 611 | /* |
| 612 | * Move prev_epos and cur_epos into indirect extent if we are at |
| 613 | * the pointer to it |
| 614 | */ |
| 615 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); |
| 616 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
| 618 | /* if the extent is allocated and recorded, return the block |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 619 | if the extent is not a multiple of the blocksize, round up */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 621 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
| 622 | if (elen & (inode->i_sb->s_blocksize - 1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | elen = EXT_RECORDED_ALLOCATED | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 624 | ((elen + inode->i_sb->s_blocksize - 1) & |
| 625 | ~(inode->i_sb->s_blocksize - 1)); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 626 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | } |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 628 | brelse(prev_epos.bh); |
| 629 | brelse(cur_epos.bh); |
| 630 | brelse(next_epos.bh); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 631 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | *phys = newblock; |
| 633 | return NULL; |
| 634 | } |
| 635 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 636 | last_block = block; |
| 637 | /* Are we beyond EOF? */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 638 | if (etype == -1) { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 639 | int ret; |
| 640 | |
| 641 | if (count) { |
| 642 | if (c) |
| 643 | laarr[0] = laarr[1]; |
| 644 | startnum = 1; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 645 | } else { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 646 | /* Create a fake extent when there's not one */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 647 | memset(&laarr[0].extLocation, 0x00, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 648 | sizeof(struct kernel_lb_addr)); |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 649 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 650 | /* Will udf_do_extend_file() create real extent from |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 651 | a fake one? */ |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 652 | startnum = (offset > 0); |
| 653 | } |
| 654 | /* Create extents for the hole between EOF and offset */ |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 655 | ret = udf_do_extend_file(inode, &prev_epos, laarr, offset); |
| 656 | if (ret < 0) { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 657 | brelse(prev_epos.bh); |
| 658 | brelse(cur_epos.bh); |
| 659 | brelse(next_epos.bh); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 660 | *err = ret; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 661 | return NULL; |
| 662 | } |
| 663 | c = 0; |
| 664 | offset = 0; |
| 665 | count += ret; |
| 666 | /* We are not covered by a preallocated extent? */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 667 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
| 668 | EXT_NOT_RECORDED_ALLOCATED) { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 669 | /* Is there any real extent? - otherwise we overwrite |
| 670 | * the fake one... */ |
| 671 | if (count) |
| 672 | c = !c; |
| 673 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 674 | inode->i_sb->s_blocksize; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 675 | memset(&laarr[c].extLocation, 0x00, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 676 | sizeof(struct kernel_lb_addr)); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 677 | count++; |
| 678 | endnum++; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 679 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 680 | endnum = c + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | lastblock = 1; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 682 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | endnum = startnum = ((count > 2) ? 2 : count); |
| 684 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 685 | /* if the current extent is in position 0, |
| 686 | swap it with the previous */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 687 | if (!c && count != 1) { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 688 | laarr[2] = laarr[0]; |
| 689 | laarr[0] = laarr[1]; |
| 690 | laarr[1] = laarr[2]; |
| 691 | c = 1; |
| 692 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 694 | /* if the current block is located in an extent, |
| 695 | read the next extent */ |
| 696 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); |
| 697 | if (etype != -1) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 698 | laarr[c + 1].extLength = (etype << 30) | elen; |
| 699 | laarr[c + 1].extLocation = eloc; |
| 700 | count++; |
| 701 | startnum++; |
| 702 | endnum++; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 703 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | lastblock = 1; |
| 705 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
| 707 | /* if the current extent is not recorded but allocated, get the |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 708 | * block in the extent corresponding to the requested block */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 709 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 711 | else { /* otherwise, allocate a new block */ |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 712 | if (iinfo->i_next_alloc_block == block) |
| 713 | goal = iinfo->i_next_alloc_goal; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 715 | if (!goal) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 716 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 717 | goal = iinfo->i_location.logicalBlockNum + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | } |
| 719 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 720 | newblocknum = udf_new_block(inode->i_sb, inode, |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 721 | iinfo->i_location.partitionReferenceNum, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 722 | goal, err); |
| 723 | if (!newblocknum) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 724 | brelse(prev_epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | *err = -ENOSPC; |
| 726 | return NULL; |
| 727 | } |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 728 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
| 730 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 731 | /* if the extent the requsted block is located in contains multiple |
| 732 | * blocks, split the extent into at most three extents. blocks prior |
| 733 | * to requested block, requested block, and blocks after requested |
| 734 | * block */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
| 736 | |
| 737 | #ifdef UDF_PREALLOCATE |
Jan Kara | 81056dd | 2009-07-16 18:02:25 +0200 | [diff] [blame] | 738 | /* We preallocate blocks only for regular files. It also makes sense |
| 739 | * for directories but there's a problem when to drop the |
| 740 | * preallocation. We might use some delayed work for that but I feel |
| 741 | * it's overengineering for a filesystem like UDF. */ |
| 742 | if (S_ISREG(inode->i_mode)) |
| 743 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | #endif |
| 745 | |
| 746 | /* merge any continuous blocks in laarr */ |
| 747 | udf_merge_extents(inode, laarr, &endnum); |
| 748 | |
| 749 | /* write back the new extents, inserting new extents if the new number |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 750 | * of extents is greater than the old number, and deleting extents if |
| 751 | * the new number of extents is less than the old number */ |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 752 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 754 | brelse(prev_epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 756 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 757 | iinfo->i_location.partitionReferenceNum, 0); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 758 | if (!newblock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | *phys = newblock; |
| 761 | *err = 0; |
| 762 | *new = 1; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 763 | iinfo->i_next_alloc_block = block; |
| 764 | iinfo->i_next_alloc_goal = newblocknum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | inode->i_ctime = current_fs_time(inode->i_sb); |
| 766 | |
| 767 | if (IS_SYNC(inode)) |
| 768 | udf_sync_inode(inode); |
| 769 | else |
| 770 | mark_inode_dirty(inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | return result; |
| 773 | } |
| 774 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 775 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
| 776 | int newblocknum, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 777 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 778 | int *endnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 780 | unsigned long blocksize = inode->i_sb->s_blocksize; |
| 781 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
| 782 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 784 | (laarr[*c].extLength >> 30) == |
| 785 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | int curr = *c; |
| 787 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 788 | blocksize - 1) >> blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | int8_t etype = (laarr[curr].extLength >> 30); |
| 790 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 791 | if (blen == 1) |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 792 | ; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 793 | else if (!offset || blen == offset + 1) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 794 | laarr[curr + 2] = laarr[curr + 1]; |
| 795 | laarr[curr + 1] = laarr[curr]; |
| 796 | } else { |
| 797 | laarr[curr + 3] = laarr[curr + 1]; |
| 798 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | } |
| 800 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 801 | if (offset) { |
| 802 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 803 | udf_free_blocks(inode->i_sb, inode, |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 804 | &laarr[curr].extLocation, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 805 | 0, offset); |
| 806 | laarr[curr].extLength = |
| 807 | EXT_NOT_RECORDED_NOT_ALLOCATED | |
| 808 | (offset << blocksize_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | laarr[curr].extLocation.logicalBlockNum = 0; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 810 | laarr[curr].extLocation. |
| 811 | partitionReferenceNum = 0; |
| 812 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | laarr[curr].extLength = (etype << 30) | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 814 | (offset << blocksize_bits); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 815 | curr++; |
| 816 | (*c)++; |
| 817 | (*endnum)++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | } |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
| 821 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) |
| 822 | laarr[curr].extLocation.partitionReferenceNum = |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 823 | UDF_I(inode)->i_location.partitionReferenceNum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 825 | blocksize; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 826 | curr++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 828 | if (blen != offset + 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 830 | laarr[curr].extLocation.logicalBlockNum += |
| 831 | offset + 1; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 832 | laarr[curr].extLength = (etype << 30) | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 833 | ((blen - (offset + 1)) << blocksize_bits); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 834 | curr++; |
| 835 | (*endnum)++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | } |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 841 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 842 | int *endnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | { |
| 844 | int start, length = 0, currlength = 0, i; |
| 845 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 846 | if (*endnum >= (c + 1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | if (!lastblock) |
| 848 | return; |
| 849 | else |
| 850 | start = c; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 851 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 852 | if ((laarr[c + 1].extLength >> 30) == |
| 853 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 854 | start = c + 1; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 855 | length = currlength = |
| 856 | (((laarr[c + 1].extLength & |
| 857 | UDF_EXTENT_LENGTH_MASK) + |
| 858 | inode->i_sb->s_blocksize - 1) >> |
| 859 | inode->i_sb->s_blocksize_bits); |
| 860 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | start = c; |
| 862 | } |
| 863 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 864 | for (i = start + 1; i <= *endnum; i++) { |
| 865 | if (i == *endnum) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | if (lastblock) |
| 867 | length += UDF_DEFAULT_PREALLOC_BLOCKS; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 868 | } else if ((laarr[i].extLength >> 30) == |
| 869 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { |
| 870 | length += (((laarr[i].extLength & |
| 871 | UDF_EXTENT_LENGTH_MASK) + |
| 872 | inode->i_sb->s_blocksize - 1) >> |
| 873 | inode->i_sb->s_blocksize_bits); |
| 874 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | break; |
| 876 | } |
| 877 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 878 | if (length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | int next = laarr[start].extLocation.logicalBlockNum + |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 880 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 881 | inode->i_sb->s_blocksize - 1) >> |
| 882 | inode->i_sb->s_blocksize_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 884 | laarr[start].extLocation.partitionReferenceNum, |
| 885 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? |
| 886 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - |
| 887 | currlength); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 888 | if (numalloc) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 889 | if (start == (c + 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | laarr[start].extLength += |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 891 | (numalloc << |
| 892 | inode->i_sb->s_blocksize_bits); |
| 893 | else { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 894 | memmove(&laarr[c + 2], &laarr[c + 1], |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 895 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 896 | (*endnum)++; |
| 897 | laarr[c + 1].extLocation.logicalBlockNum = next; |
| 898 | laarr[c + 1].extLocation.partitionReferenceNum = |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 899 | laarr[c].extLocation. |
| 900 | partitionReferenceNum; |
| 901 | laarr[c + 1].extLength = |
| 902 | EXT_NOT_RECORDED_ALLOCATED | |
| 903 | (numalloc << |
| 904 | inode->i_sb->s_blocksize_bits); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 905 | start = c + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | } |
| 907 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 908 | for (i = start + 1; numalloc && i < *endnum; i++) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 909 | int elen = ((laarr[i].extLength & |
| 910 | UDF_EXTENT_LENGTH_MASK) + |
| 911 | inode->i_sb->s_blocksize - 1) >> |
| 912 | inode->i_sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 914 | if (elen > numalloc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | laarr[i].extLength -= |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 916 | (numalloc << |
| 917 | inode->i_sb->s_blocksize_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | numalloc = 0; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 919 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | numalloc -= elen; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 921 | if (*endnum > (i + 1)) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 922 | memmove(&laarr[i], |
| 923 | &laarr[i + 1], |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 924 | sizeof(struct long_ad) * |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 925 | (*endnum - (i + 1))); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 926 | i--; |
| 927 | (*endnum)--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |
| 929 | } |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 930 | UDF_I(inode)->i_lenExtents += |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 931 | numalloc << inode->i_sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | } |
| 933 | } |
| 934 | } |
| 935 | |
| 936 | static void udf_merge_extents(struct inode *inode, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 937 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 938 | int *endnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | { |
| 940 | int i; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 941 | unsigned long blocksize = inode->i_sb->s_blocksize; |
| 942 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 944 | for (i = 0; i < (*endnum - 1); i++) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 945 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
| 946 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 948 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && |
| 949 | (((li->extLength >> 30) == |
| 950 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || |
| 951 | ((lip1->extLocation.logicalBlockNum - |
| 952 | li->extLocation.logicalBlockNum) == |
| 953 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + |
| 954 | blocksize - 1) >> blocksize_bits)))) { |
| 955 | |
| 956 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + |
| 957 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + |
| 958 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { |
| 959 | lip1->extLength = (lip1->extLength - |
| 960 | (li->extLength & |
| 961 | UDF_EXTENT_LENGTH_MASK) + |
| 962 | UDF_EXTENT_LENGTH_MASK) & |
| 963 | ~(blocksize - 1); |
| 964 | li->extLength = (li->extLength & |
| 965 | UDF_EXTENT_FLAG_MASK) + |
| 966 | (UDF_EXTENT_LENGTH_MASK + 1) - |
| 967 | blocksize; |
| 968 | lip1->extLocation.logicalBlockNum = |
| 969 | li->extLocation.logicalBlockNum + |
| 970 | ((li->extLength & |
| 971 | UDF_EXTENT_LENGTH_MASK) >> |
| 972 | blocksize_bits); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 973 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 974 | li->extLength = lip1->extLength + |
| 975 | (((li->extLength & |
| 976 | UDF_EXTENT_LENGTH_MASK) + |
| 977 | blocksize - 1) & ~(blocksize - 1)); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 978 | if (*endnum > (i + 2)) |
| 979 | memmove(&laarr[i + 1], &laarr[i + 2], |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 980 | sizeof(struct long_ad) * |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 981 | (*endnum - (i + 2))); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 982 | i--; |
| 983 | (*endnum)--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 985 | } else if (((li->extLength >> 30) == |
| 986 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && |
| 987 | ((lip1->extLength >> 30) == |
| 988 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 989 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 990 | ((li->extLength & |
| 991 | UDF_EXTENT_LENGTH_MASK) + |
| 992 | blocksize - 1) >> blocksize_bits); |
| 993 | li->extLocation.logicalBlockNum = 0; |
| 994 | li->extLocation.partitionReferenceNum = 0; |
| 995 | |
| 996 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + |
| 997 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + |
| 998 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { |
| 999 | lip1->extLength = (lip1->extLength - |
| 1000 | (li->extLength & |
| 1001 | UDF_EXTENT_LENGTH_MASK) + |
| 1002 | UDF_EXTENT_LENGTH_MASK) & |
| 1003 | ~(blocksize - 1); |
| 1004 | li->extLength = (li->extLength & |
| 1005 | UDF_EXTENT_FLAG_MASK) + |
| 1006 | (UDF_EXTENT_LENGTH_MASK + 1) - |
| 1007 | blocksize; |
| 1008 | } else { |
| 1009 | li->extLength = lip1->extLength + |
| 1010 | (((li->extLength & |
| 1011 | UDF_EXTENT_LENGTH_MASK) + |
| 1012 | blocksize - 1) & ~(blocksize - 1)); |
| 1013 | if (*endnum > (i + 2)) |
| 1014 | memmove(&laarr[i + 1], &laarr[i + 2], |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1015 | sizeof(struct long_ad) * |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1016 | (*endnum - (i + 2))); |
| 1017 | i--; |
| 1018 | (*endnum)--; |
| 1019 | } |
| 1020 | } else if ((li->extLength >> 30) == |
| 1021 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { |
| 1022 | udf_free_blocks(inode->i_sb, inode, |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1023 | &li->extLocation, 0, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1024 | ((li->extLength & |
| 1025 | UDF_EXTENT_LENGTH_MASK) + |
| 1026 | blocksize - 1) >> blocksize_bits); |
| 1027 | li->extLocation.logicalBlockNum = 0; |
| 1028 | li->extLocation.partitionReferenceNum = 0; |
| 1029 | li->extLength = (li->extLength & |
| 1030 | UDF_EXTENT_LENGTH_MASK) | |
| 1031 | EXT_NOT_RECORDED_NOT_ALLOCATED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | } |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | static void udf_update_extents(struct inode *inode, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1037 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1038 | int startnum, int endnum, |
| 1039 | struct extent_position *epos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | { |
| 1041 | int start = 0, i; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1042 | struct kernel_lb_addr tmploc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | uint32_t tmplen; |
| 1044 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1045 | if (startnum > endnum) { |
| 1046 | for (i = 0; i < (startnum - endnum); i++) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1047 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1048 | laarr[i].extLength); |
| 1049 | } else if (startnum < endnum) { |
| 1050 | for (i = 0; i < (endnum - startnum); i++) { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1051 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1052 | laarr[i].extLength); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1053 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1054 | &laarr[i].extLength, 1); |
| 1055 | start++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | } |
| 1057 | } |
| 1058 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1059 | for (i = start; i < endnum; i++) { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1060 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1061 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1062 | laarr[i].extLength, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | } |
| 1064 | } |
| 1065 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1066 | struct buffer_head *udf_bread(struct inode *inode, int block, |
| 1067 | int create, int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1069 | struct buffer_head *bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
| 1071 | bh = udf_getblk(inode, block, create, err); |
| 1072 | if (!bh) |
| 1073 | return NULL; |
| 1074 | |
| 1075 | if (buffer_uptodate(bh)) |
| 1076 | return bh; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1077 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | ll_rw_block(READ, 1, &bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1079 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | wait_on_buffer(bh); |
| 1081 | if (buffer_uptodate(bh)) |
| 1082 | return bh; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1083 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | brelse(bh); |
| 1085 | *err = -EIO; |
| 1086 | return NULL; |
| 1087 | } |
| 1088 | |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1089 | int udf_setsize(struct inode *inode, loff_t newsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | int err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1092 | struct udf_inode_info *iinfo; |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1093 | int bsize = 1 << inode->i_blkbits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
| 1095 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1096 | S_ISLNK(inode->i_mode))) |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1097 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1099 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1101 | iinfo = UDF_I(inode); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1102 | if (newsize > inode->i_size) { |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 1103 | down_write(&iinfo->i_data_sem); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1104 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
| 1105 | if (bsize < |
| 1106 | (udf_file_entry_alloc_offset(inode) + newsize)) { |
| 1107 | err = udf_expand_file_adinicb(inode); |
| 1108 | if (err) { |
| 1109 | up_write(&iinfo->i_data_sem); |
| 1110 | return err; |
| 1111 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1112 | } else |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1113 | iinfo->i_lenAlloc = newsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | } |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1115 | err = udf_extend_file(inode, newsize); |
| 1116 | if (err) { |
| 1117 | up_write(&iinfo->i_data_sem); |
| 1118 | return err; |
| 1119 | } |
| 1120 | truncate_setsize(inode, newsize); |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 1121 | up_write(&iinfo->i_data_sem); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1122 | } else { |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1123 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
| 1124 | down_write(&iinfo->i_data_sem); |
| 1125 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, |
| 1126 | 0x00, bsize - newsize - |
| 1127 | udf_file_entry_alloc_offset(inode)); |
| 1128 | iinfo->i_lenAlloc = newsize; |
| 1129 | truncate_setsize(inode, newsize); |
| 1130 | up_write(&iinfo->i_data_sem); |
| 1131 | goto update_time; |
| 1132 | } |
| 1133 | err = block_truncate_page(inode->i_mapping, newsize, |
| 1134 | udf_get_block); |
| 1135 | if (err) |
| 1136 | return err; |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 1137 | down_write(&iinfo->i_data_sem); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1138 | truncate_setsize(inode, newsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | udf_truncate_extents(inode); |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 1140 | up_write(&iinfo->i_data_sem); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1141 | } |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1142 | update_time: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); |
| 1144 | if (IS_SYNC(inode)) |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1145 | udf_sync_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | else |
| 1147 | mark_inode_dirty(inode); |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1148 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | } |
| 1150 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1151 | static void __udf_read_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | { |
| 1153 | struct buffer_head *bh = NULL; |
| 1154 | struct fileEntry *fe; |
| 1155 | uint16_t ident; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1156 | struct udf_inode_info *iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
| 1158 | /* |
| 1159 | * Set defaults, but the inode is still incomplete! |
| 1160 | * Note: get_new_inode() sets the following on a new inode: |
| 1161 | * i_sb = sb |
| 1162 | * i_no = ino |
| 1163 | * i_flags = sb->s_flags |
| 1164 | * i_state = 0 |
| 1165 | * clean_inode(): zero fills and sets |
| 1166 | * i_count = 1 |
| 1167 | * i_nlink = 1 |
| 1168 | * i_op = NULL; |
| 1169 | */ |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1170 | bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1171 | if (!bh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1173 | inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | make_bad_inode(inode); |
| 1175 | return; |
| 1176 | } |
| 1177 | |
| 1178 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1179 | ident != TAG_IDENT_USE) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1180 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
| 1181 | "failed ident=%d\n", inode->i_ino, ident); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1182 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | make_bad_inode(inode); |
| 1184 | return; |
| 1185 | } |
| 1186 | |
| 1187 | fe = (struct fileEntry *)bh->b_data; |
| 1188 | |
Marcin Slusarz | 5e0f001 | 2008-02-08 04:20:41 -0800 | [diff] [blame] | 1189 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1190 | struct buffer_head *ibh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1192 | ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1193 | &ident); |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1194 | if (ident == TAG_IDENT_IE && ibh) { |
| 1195 | struct buffer_head *nbh = NULL; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1196 | struct kernel_lb_addr loc; |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1197 | struct indirectEntry *ie; |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1198 | |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1199 | ie = (struct indirectEntry *)ibh->b_data; |
| 1200 | loc = lelb_to_cpu(ie->indirectICB.extLocation); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1201 | |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1202 | if (ie->indirectICB.extLength && |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1203 | (nbh = udf_read_ptagged(inode->i_sb, &loc, 0, |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1204 | &ident))) { |
| 1205 | if (ident == TAG_IDENT_FE || |
| 1206 | ident == TAG_IDENT_EFE) { |
| 1207 | memcpy(&iinfo->i_location, |
| 1208 | &loc, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1209 | sizeof(struct kernel_lb_addr)); |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1210 | brelse(bh); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1211 | brelse(ibh); |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1212 | brelse(nbh); |
| 1213 | __udf_read_inode(inode); |
| 1214 | return; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1215 | } |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1216 | brelse(nbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1218 | } |
marcin.slusarz@gmail.com | 1ab9278 | 2008-01-30 22:03:58 +0100 | [diff] [blame] | 1219 | brelse(ibh); |
Marcin Slusarz | 5e0f001 | 2008-02-08 04:20:41 -0800 | [diff] [blame] | 1220 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1222 | le16_to_cpu(fe->icbTag.strategyType)); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1223 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | make_bad_inode(inode); |
| 1225 | return; |
| 1226 | } |
| 1227 | udf_fill_inode(inode, bh); |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 1228 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1229 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | } |
| 1231 | |
| 1232 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) |
| 1233 | { |
| 1234 | struct fileEntry *fe; |
| 1235 | struct extendedFileEntry *efe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | int offset; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1237 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1238 | struct udf_inode_info *iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | |
| 1240 | fe = (struct fileEntry *)bh->b_data; |
| 1241 | efe = (struct extendedFileEntry *)bh->b_data; |
| 1242 | |
Marcin Slusarz | 5e0f001 | 2008-02-08 04:20:41 -0800 | [diff] [blame] | 1243 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1244 | iinfo->i_strat4096 = 0; |
Marcin Slusarz | 5e0f001 | 2008-02-08 04:20:41 -0800 | [diff] [blame] | 1245 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1246 | iinfo->i_strat4096 = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1248 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1249 | ICBTAG_FLAG_AD_MASK; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1250 | iinfo->i_unique = 0; |
| 1251 | iinfo->i_lenEAttr = 0; |
| 1252 | iinfo->i_lenExtents = 0; |
| 1253 | iinfo->i_lenAlloc = 0; |
| 1254 | iinfo->i_next_alloc_block = 0; |
| 1255 | iinfo->i_next_alloc_goal = 0; |
Marcin Slusarz | 5e0f001 | 2008-02-08 04:20:41 -0800 | [diff] [blame] | 1256 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1257 | iinfo->i_efe = 1; |
| 1258 | iinfo->i_use = 0; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1259 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
| 1260 | sizeof(struct extendedFileEntry))) { |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1261 | make_bad_inode(inode); |
| 1262 | return; |
| 1263 | } |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1264 | memcpy(iinfo->i_ext.i_data, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1265 | bh->b_data + sizeof(struct extendedFileEntry), |
| 1266 | inode->i_sb->s_blocksize - |
| 1267 | sizeof(struct extendedFileEntry)); |
Marcin Slusarz | 5e0f001 | 2008-02-08 04:20:41 -0800 | [diff] [blame] | 1268 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1269 | iinfo->i_efe = 0; |
| 1270 | iinfo->i_use = 0; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1271 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
| 1272 | sizeof(struct fileEntry))) { |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1273 | make_bad_inode(inode); |
| 1274 | return; |
| 1275 | } |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1276 | memcpy(iinfo->i_ext.i_data, |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1277 | bh->b_data + sizeof(struct fileEntry), |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1278 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
Marcin Slusarz | 5e0f001 | 2008-02-08 04:20:41 -0800 | [diff] [blame] | 1279 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1280 | iinfo->i_efe = 0; |
| 1281 | iinfo->i_use = 1; |
| 1282 | iinfo->i_lenAlloc = le32_to_cpu( |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1283 | ((struct unallocSpaceEntry *)bh->b_data)-> |
| 1284 | lengthAllocDescs); |
| 1285 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
| 1286 | sizeof(struct unallocSpaceEntry))) { |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1287 | make_bad_inode(inode); |
| 1288 | return; |
| 1289 | } |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1290 | memcpy(iinfo->i_ext.i_data, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1291 | bh->b_data + sizeof(struct unallocSpaceEntry), |
| 1292 | inode->i_sb->s_blocksize - |
| 1293 | sizeof(struct unallocSpaceEntry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | return; |
| 1295 | } |
| 1296 | |
Jan Kara | c03cad2 | 2010-10-20 22:17:28 +0200 | [diff] [blame] | 1297 | read_lock(&sbi->s_cred_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | inode->i_uid = le32_to_cpu(fe->uid); |
Cyrill Gorcunov | ca76d2d | 2007-07-31 00:39:40 -0700 | [diff] [blame] | 1299 | if (inode->i_uid == -1 || |
| 1300 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || |
| 1301 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) |
Phillip Susi | 4d6660e | 2006-03-07 21:55:24 -0800 | [diff] [blame] | 1302 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
| 1304 | inode->i_gid = le32_to_cpu(fe->gid); |
Cyrill Gorcunov | ca76d2d | 2007-07-31 00:39:40 -0700 | [diff] [blame] | 1305 | if (inode->i_gid == -1 || |
| 1306 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || |
| 1307 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) |
Phillip Susi | 4d6660e | 2006-03-07 21:55:24 -0800 | [diff] [blame] | 1308 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 1310 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
Marcin Slusarz | 87bc730 | 2008-12-02 13:40:11 +0100 | [diff] [blame] | 1311 | sbi->s_fmode != UDF_INVALID_MODE) |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 1312 | inode->i_mode = sbi->s_fmode; |
| 1313 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && |
Marcin Slusarz | 87bc730 | 2008-12-02 13:40:11 +0100 | [diff] [blame] | 1314 | sbi->s_dmode != UDF_INVALID_MODE) |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 1315 | inode->i_mode = sbi->s_dmode; |
| 1316 | else |
| 1317 | inode->i_mode = udf_convert_permissions(fe); |
| 1318 | inode->i_mode &= ~sbi->s_umask; |
Jan Kara | c03cad2 | 2010-10-20 22:17:28 +0200 | [diff] [blame] | 1319 | read_unlock(&sbi->s_cred_lock); |
| 1320 | |
| 1321 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); |
| 1322 | if (!inode->i_nlink) |
| 1323 | inode->i_nlink = 1; |
| 1324 | |
| 1325 | inode->i_size = le64_to_cpu(fe->informationLength); |
| 1326 | iinfo->i_lenExtents = inode->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1328 | if (iinfo->i_efe == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1330 | (inode->i_sb->s_blocksize_bits - 9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1332 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
marcin.slusarz@gmail.com | cbf5676 | 2008-02-27 22:50:14 +0100 | [diff] [blame] | 1333 | inode->i_atime = sbi->s_record_time; |
| 1334 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1335 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
| 1336 | fe->modificationTime)) |
marcin.slusarz@gmail.com | cbf5676 | 2008-02-27 22:50:14 +0100 | [diff] [blame] | 1337 | inode->i_mtime = sbi->s_record_time; |
| 1338 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1339 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
marcin.slusarz@gmail.com | cbf5676 | 2008-02-27 22:50:14 +0100 | [diff] [blame] | 1340 | inode->i_ctime = sbi->s_record_time; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1342 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
| 1343 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); |
| 1344 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); |
| 1345 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1346 | } else { |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1347 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1348 | (inode->i_sb->s_blocksize_bits - 9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1350 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
marcin.slusarz@gmail.com | cbf5676 | 2008-02-27 22:50:14 +0100 | [diff] [blame] | 1351 | inode->i_atime = sbi->s_record_time; |
| 1352 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1353 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
| 1354 | efe->modificationTime)) |
marcin.slusarz@gmail.com | cbf5676 | 2008-02-27 22:50:14 +0100 | [diff] [blame] | 1355 | inode->i_mtime = sbi->s_record_time; |
| 1356 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1357 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
marcin.slusarz@gmail.com | cbf5676 | 2008-02-27 22:50:14 +0100 | [diff] [blame] | 1358 | iinfo->i_crtime = sbi->s_record_time; |
| 1359 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1360 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
marcin.slusarz@gmail.com | cbf5676 | 2008-02-27 22:50:14 +0100 | [diff] [blame] | 1361 | inode->i_ctime = sbi->s_record_time; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1363 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
| 1364 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); |
| 1365 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1366 | offset = sizeof(struct extendedFileEntry) + |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1367 | iinfo->i_lenEAttr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | } |
| 1369 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1370 | switch (fe->icbTag.fileType) { |
| 1371 | case ICBTAG_FILE_TYPE_DIRECTORY: |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1372 | inode->i_op = &udf_dir_inode_operations; |
| 1373 | inode->i_fop = &udf_dir_operations; |
| 1374 | inode->i_mode |= S_IFDIR; |
| 1375 | inc_nlink(inode); |
| 1376 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1377 | case ICBTAG_FILE_TYPE_REALTIME: |
| 1378 | case ICBTAG_FILE_TYPE_REGULAR: |
| 1379 | case ICBTAG_FILE_TYPE_UNDEF: |
Jan Kara | 742e179 | 2008-04-08 01:17:52 +0200 | [diff] [blame] | 1380 | case ICBTAG_FILE_TYPE_VAT20: |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1381 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1382 | inode->i_data.a_ops = &udf_adinicb_aops; |
| 1383 | else |
| 1384 | inode->i_data.a_ops = &udf_aops; |
| 1385 | inode->i_op = &udf_file_inode_operations; |
| 1386 | inode->i_fop = &udf_file_operations; |
| 1387 | inode->i_mode |= S_IFREG; |
| 1388 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1389 | case ICBTAG_FILE_TYPE_BLOCK: |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1390 | inode->i_mode |= S_IFBLK; |
| 1391 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1392 | case ICBTAG_FILE_TYPE_CHAR: |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1393 | inode->i_mode |= S_IFCHR; |
| 1394 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1395 | case ICBTAG_FILE_TYPE_FIFO: |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1396 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
| 1397 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1398 | case ICBTAG_FILE_TYPE_SOCKET: |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1399 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
| 1400 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1401 | case ICBTAG_FILE_TYPE_SYMLINK: |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1402 | inode->i_data.a_ops = &udf_symlink_aops; |
Dmitry Monakhov | c15d0fc | 2010-03-29 11:05:21 +0400 | [diff] [blame] | 1403 | inode->i_op = &udf_symlink_inode_operations; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1404 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
| 1405 | break; |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1406 | case ICBTAG_FILE_TYPE_MAIN: |
| 1407 | udf_debug("METADATA FILE-----\n"); |
| 1408 | break; |
| 1409 | case ICBTAG_FILE_TYPE_MIRROR: |
| 1410 | udf_debug("METADATA MIRROR FILE-----\n"); |
| 1411 | break; |
| 1412 | case ICBTAG_FILE_TYPE_BITMAP: |
| 1413 | udf_debug("METADATA BITMAP FILE-----\n"); |
| 1414 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1415 | default: |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1416 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
| 1417 | "file type=%d\n", inode->i_ino, |
| 1418 | fe->icbTag.fileType); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1419 | make_bad_inode(inode); |
| 1420 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1422 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1423 | struct deviceSpec *dsea = |
| 1424 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1425 | if (dsea) { |
| 1426 | init_special_inode(inode, inode->i_mode, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1427 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
| 1428 | le32_to_cpu(dsea->minorDeviceIdent))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | /* Developer ID ??? */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1430 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | make_bad_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | } |
| 1433 | } |
| 1434 | |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1435 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
| 1436 | { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1437 | struct udf_inode_info *iinfo = UDF_I(inode); |
| 1438 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1439 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1440 | if (!iinfo->i_ext.i_data) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1441 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
| 1442 | "no free memory\n", inode->i_ino); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 1443 | return -ENOMEM; |
| 1444 | } |
| 1445 | |
| 1446 | return 0; |
| 1447 | } |
| 1448 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1449 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | { |
| 1451 | mode_t mode; |
| 1452 | uint32_t permissions; |
| 1453 | uint32_t flags; |
| 1454 | |
| 1455 | permissions = le32_to_cpu(fe->permissions); |
| 1456 | flags = le16_to_cpu(fe->icbTag.flags); |
| 1457 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1458 | mode = ((permissions) & S_IRWXO) | |
| 1459 | ((permissions >> 2) & S_IRWXG) | |
| 1460 | ((permissions >> 4) & S_IRWXU) | |
| 1461 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | |
| 1462 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | |
| 1463 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | |
| 1465 | return mode; |
| 1466 | } |
| 1467 | |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 1468 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | { |
Jan Kara | 49521de | 2010-10-20 17:42:44 +0200 | [diff] [blame] | 1470 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | } |
| 1472 | |
Jan Kara | 49521de | 2010-10-20 17:42:44 +0200 | [diff] [blame] | 1473 | static int udf_sync_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | { |
| 1475 | return udf_update_inode(inode, 1); |
| 1476 | } |
| 1477 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1478 | static int udf_update_inode(struct inode *inode, int do_sync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | { |
| 1480 | struct buffer_head *bh = NULL; |
| 1481 | struct fileEntry *fe; |
| 1482 | struct extendedFileEntry *efe; |
| 1483 | uint32_t udfperms; |
| 1484 | uint16_t icbflags; |
| 1485 | uint16_t crclen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | int err = 0; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1487 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1488 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1489 | struct udf_inode_info *iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | |
Jan Kara | 5833ded | 2010-01-08 16:52:59 +0100 | [diff] [blame] | 1491 | bh = udf_tgetblk(inode->i_sb, |
| 1492 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1493 | if (!bh) { |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1494 | udf_debug("getblk failure\n"); |
| 1495 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | } |
| 1497 | |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1498 | lock_buffer(bh); |
| 1499 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | fe = (struct fileEntry *)bh->b_data; |
| 1501 | efe = (struct extendedFileEntry *)bh->b_data; |
| 1502 | |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1503 | if (iinfo->i_use) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | struct unallocSpaceEntry *use = |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1505 | (struct unallocSpaceEntry *)bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1507 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1508 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1509 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1510 | sizeof(struct unallocSpaceEntry)); |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1511 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
| 1512 | use->descTag.tagLocation = |
| 1513 | cpu_to_le32(iinfo->i_location.logicalBlockNum); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1514 | crclen = sizeof(struct unallocSpaceEntry) + |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1515 | iinfo->i_lenAlloc - sizeof(struct tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 1517 | use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1518 | sizeof(struct tag), |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 1519 | crclen)); |
Marcin Slusarz | 3f2587b | 2008-02-08 04:20:39 -0800 | [diff] [blame] | 1520 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1522 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | } |
| 1524 | |
Phillip Susi | 4d6660e | 2006-03-07 21:55:24 -0800 | [diff] [blame] | 1525 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
| 1526 | fe->uid = cpu_to_le32(-1); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1527 | else |
| 1528 | fe->uid = cpu_to_le32(inode->i_uid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | |
Phillip Susi | 4d6660e | 2006-03-07 21:55:24 -0800 | [diff] [blame] | 1530 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
| 1531 | fe->gid = cpu_to_le32(-1); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1532 | else |
| 1533 | fe->gid = cpu_to_le32(inode->i_gid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1535 | udfperms = ((inode->i_mode & S_IRWXO)) | |
| 1536 | ((inode->i_mode & S_IRWXG) << 2) | |
| 1537 | ((inode->i_mode & S_IRWXU) << 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1539 | udfperms |= (le32_to_cpu(fe->permissions) & |
| 1540 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | |
| 1541 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | |
| 1542 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | fe->permissions = cpu_to_le32(udfperms); |
| 1544 | |
| 1545 | if (S_ISDIR(inode->i_mode)) |
| 1546 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
| 1547 | else |
| 1548 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); |
| 1549 | |
| 1550 | fe->informationLength = cpu_to_le64(inode->i_size); |
| 1551 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1552 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1553 | struct regid *eid; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1554 | struct deviceSpec *dsea = |
| 1555 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1556 | if (!dsea) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | dsea = (struct deviceSpec *) |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1558 | udf_add_extendedattr(inode, |
| 1559 | sizeof(struct deviceSpec) + |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1560 | sizeof(struct regid), 12, 0x3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | dsea->attrType = cpu_to_le32(12); |
| 1562 | dsea->attrSubtype = 1; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1563 | dsea->attrLength = cpu_to_le32( |
| 1564 | sizeof(struct deviceSpec) + |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1565 | sizeof(struct regid)); |
| 1566 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | } |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1568 | eid = (struct regid *)dsea->impUse; |
| 1569 | memset(eid, 0, sizeof(struct regid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
| 1571 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1572 | eid->identSuffix[1] = UDF_OS_ID_LINUX; |
| 1573 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); |
| 1574 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); |
| 1575 | } |
| 1576 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1577 | if (iinfo->i_efe == 0) { |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1578 | memcpy(bh->b_data + sizeof(struct fileEntry), |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1579 | iinfo->i_ext.i_data, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1580 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1581 | fe->logicalBlocksRecorded = cpu_to_le64( |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1582 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
| 1583 | (blocksize_bits - 9)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1585 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
| 1586 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); |
| 1587 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1588 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
| 1590 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1591 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1592 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
| 1593 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); |
| 1594 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
| 1596 | crclen = sizeof(struct fileEntry); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1597 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1598 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1599 | iinfo->i_ext.i_data, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1600 | inode->i_sb->s_blocksize - |
| 1601 | sizeof(struct extendedFileEntry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | efe->objectSize = cpu_to_le64(inode->i_size); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1603 | efe->logicalBlocksRecorded = cpu_to_le64( |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1604 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
| 1605 | (blocksize_bits - 9)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1607 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
| 1608 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && |
| 1609 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) |
| 1610 | iinfo->i_crtime = inode->i_atime; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1611 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1612 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
| 1613 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && |
| 1614 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) |
| 1615 | iinfo->i_crtime = inode->i_mtime; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1616 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1617 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
| 1618 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && |
| 1619 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) |
| 1620 | iinfo->i_crtime = inode->i_ctime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 1622 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
| 1623 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); |
| 1624 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); |
| 1625 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1627 | memset(&(efe->impIdent), 0, sizeof(struct regid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
| 1629 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1630 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1631 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
| 1632 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); |
| 1633 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
| 1635 | crclen = sizeof(struct extendedFileEntry); |
| 1636 | } |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1637 | if (iinfo->i_strat4096) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | fe->icbTag.strategyType = cpu_to_le16(4096); |
| 1639 | fe->icbTag.strategyParameter = cpu_to_le16(1); |
| 1640 | fe->icbTag.numEntries = cpu_to_le16(2); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1641 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | fe->icbTag.strategyType = cpu_to_le16(4); |
| 1643 | fe->icbTag.numEntries = cpu_to_le16(1); |
| 1644 | } |
| 1645 | |
| 1646 | if (S_ISDIR(inode->i_mode)) |
| 1647 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
| 1648 | else if (S_ISREG(inode->i_mode)) |
| 1649 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; |
| 1650 | else if (S_ISLNK(inode->i_mode)) |
| 1651 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; |
| 1652 | else if (S_ISBLK(inode->i_mode)) |
| 1653 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; |
| 1654 | else if (S_ISCHR(inode->i_mode)) |
| 1655 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; |
| 1656 | else if (S_ISFIFO(inode->i_mode)) |
| 1657 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; |
| 1658 | else if (S_ISSOCK(inode->i_mode)) |
| 1659 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; |
| 1660 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1661 | icbflags = iinfo->i_alloc_type | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1662 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
| 1663 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | |
| 1664 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | |
| 1665 | (le16_to_cpu(fe->icbTag.flags) & |
| 1666 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | |
| 1667 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | |
| 1669 | fe->icbTag.flags = cpu_to_le16(icbflags); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1670 | if (sbi->s_udfrev >= 0x0200) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | fe->descTag.descVersion = cpu_to_le16(3); |
| 1672 | else |
| 1673 | fe->descTag.descVersion = cpu_to_le16(2); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1674 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1675 | fe->descTag.tagLocation = cpu_to_le32( |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1676 | iinfo->i_location.logicalBlockNum); |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1677 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1679 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 1680 | crclen)); |
Marcin Slusarz | 3f2587b | 2008-02-08 04:20:39 -0800 | [diff] [blame] | 1681 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1683 | out: |
Jan Kara | 5833ded | 2010-01-08 16:52:59 +0100 | [diff] [blame] | 1684 | set_buffer_uptodate(bh); |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1685 | unlock_buffer(bh); |
| 1686 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | /* write the data blocks */ |
| 1688 | mark_buffer_dirty(bh); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1689 | if (do_sync) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | sync_dirty_buffer(bh); |
Jan Kara | aae917c | 2010-01-08 16:46:29 +0100 | [diff] [blame] | 1691 | if (buffer_write_io_error(bh)) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1692 | printk(KERN_WARNING "IO error syncing udf inode " |
| 1693 | "[%s:%08lx]\n", inode->i_sb->s_id, |
| 1694 | inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | err = -EIO; |
| 1696 | } |
| 1697 | } |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1698 | brelse(bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1699 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | return err; |
| 1701 | } |
| 1702 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1703 | struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | { |
| 1705 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); |
| 1706 | struct inode *inode = iget_locked(sb, block); |
| 1707 | |
| 1708 | if (!inode) |
| 1709 | return NULL; |
| 1710 | |
| 1711 | if (inode->i_state & I_NEW) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1712 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | __udf_read_inode(inode); |
| 1714 | unlock_new_inode(inode); |
| 1715 | } |
| 1716 | |
| 1717 | if (is_bad_inode(inode)) |
| 1718 | goto out_iput; |
| 1719 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1720 | if (ino->logicalBlockNum >= UDF_SB(sb)-> |
| 1721 | s_partmaps[ino->partitionReferenceNum].s_partition_len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | udf_debug("block=%d, partition=%d out of range\n", |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1723 | ino->logicalBlockNum, ino->partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | make_bad_inode(inode); |
| 1725 | goto out_iput; |
| 1726 | } |
| 1727 | |
| 1728 | return inode; |
| 1729 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1730 | out_iput: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | iput(inode); |
| 1732 | return NULL; |
| 1733 | } |
| 1734 | |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1735 | int udf_add_aext(struct inode *inode, struct extent_position *epos, |
| 1736 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | { |
| 1738 | int adsize; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1739 | struct short_ad *sad = NULL; |
| 1740 | struct long_ad *lad = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | struct allocExtDesc *aed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | uint8_t *ptr; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1743 | struct udf_inode_info *iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1745 | if (!epos->bh) |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1746 | ptr = iinfo->i_ext.i_data + epos->offset - |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1747 | udf_file_entry_alloc_offset(inode) + |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1748 | iinfo->i_lenEAttr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | else |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1750 | ptr = epos->bh->b_data + epos->offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1752 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1753 | adsize = sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1754 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1755 | adsize = sizeof(struct long_ad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | else |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1757 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1759 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 1760 | unsigned char *sptr, *dptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | struct buffer_head *nbh; |
| 1762 | int err, loffset; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1763 | struct kernel_lb_addr obloc = epos->block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1765 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
| 1766 | obloc.partitionReferenceNum, |
| 1767 | obloc.logicalBlockNum, &err); |
| 1768 | if (!epos->block.logicalBlockNum) |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1769 | return -ENOSPC; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1770 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1771 | &epos->block, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1772 | 0)); |
| 1773 | if (!nbh) |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1774 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | lock_buffer(nbh); |
| 1776 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); |
| 1777 | set_buffer_uptodate(nbh); |
| 1778 | unlock_buffer(nbh); |
| 1779 | mark_buffer_dirty_inode(nbh, inode); |
| 1780 | |
| 1781 | aed = (struct allocExtDesc *)(nbh->b_data); |
| 1782 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1783 | aed->previousAllocExtLocation = |
| 1784 | cpu_to_le32(obloc.logicalBlockNum); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1785 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1786 | loffset = epos->offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
| 1788 | sptr = ptr - adsize; |
| 1789 | dptr = nbh->b_data + sizeof(struct allocExtDesc); |
| 1790 | memcpy(dptr, sptr, adsize); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1791 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1792 | } else { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1793 | loffset = epos->offset + adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | aed->lengthAllocDescs = cpu_to_le32(0); |
| 1795 | sptr = ptr; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1796 | epos->offset = sizeof(struct allocExtDesc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1798 | if (epos->bh) { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1799 | aed = (struct allocExtDesc *)epos->bh->b_data; |
marcin.slusarz@gmail.com | c2104fd | 2008-01-30 22:03:57 +0100 | [diff] [blame] | 1800 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1801 | } else { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1802 | iinfo->i_lenAlloc += adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | mark_inode_dirty(inode); |
| 1804 | } |
| 1805 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1806 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1808 | epos->block.logicalBlockNum, sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1809 | else |
| 1810 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1811 | epos->block.logicalBlockNum, sizeof(struct tag)); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1812 | switch (iinfo->i_alloc_type) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1813 | case ICBTAG_FLAG_AD_SHORT: |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1814 | sad = (struct short_ad *)sptr; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1815 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
| 1816 | inode->i_sb->s_blocksize); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1817 | sad->extPosition = |
| 1818 | cpu_to_le32(epos->block.logicalBlockNum); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1819 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1820 | case ICBTAG_FLAG_AD_LONG: |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1821 | lad = (struct long_ad *)sptr; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1822 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
| 1823 | inode->i_sb->s_blocksize); |
| 1824 | lad->extLocation = cpu_to_lelb(epos->block); |
| 1825 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
| 1826 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1828 | if (epos->bh) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1829 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1830 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1831 | udf_update_tag(epos->bh->b_data, loffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | else |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1833 | udf_update_tag(epos->bh->b_data, |
| 1834 | sizeof(struct allocExtDesc)); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1835 | mark_buffer_dirty_inode(epos->bh, inode); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1836 | brelse(epos->bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1837 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | mark_inode_dirty(inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1839 | } |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1840 | epos->bh = nbh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | } |
| 1842 | |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1843 | udf_write_aext(inode, epos, eloc, elen, inc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1845 | if (!epos->bh) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1846 | iinfo->i_lenAlloc += adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | mark_inode_dirty(inode); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1848 | } else { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1849 | aed = (struct allocExtDesc *)epos->bh->b_data; |
marcin.slusarz@gmail.com | c2104fd | 2008-01-30 22:03:57 +0100 | [diff] [blame] | 1850 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1851 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
| 1852 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
| 1853 | udf_update_tag(epos->bh->b_data, |
| 1854 | epos->offset + (inc ? 0 : adsize)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | else |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1856 | udf_update_tag(epos->bh->b_data, |
| 1857 | sizeof(struct allocExtDesc)); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1858 | mark_buffer_dirty_inode(epos->bh, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | } |
| 1860 | |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1861 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | } |
| 1863 | |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1864 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
| 1865 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | { |
| 1867 | int adsize; |
| 1868 | uint8_t *ptr; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1869 | struct short_ad *sad; |
| 1870 | struct long_ad *lad; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1871 | struct udf_inode_info *iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1873 | if (!epos->bh) |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1874 | ptr = iinfo->i_ext.i_data + epos->offset - |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1875 | udf_file_entry_alloc_offset(inode) + |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1876 | iinfo->i_lenEAttr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | else |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1878 | ptr = epos->bh->b_data + epos->offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1880 | switch (iinfo->i_alloc_type) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1881 | case ICBTAG_FLAG_AD_SHORT: |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1882 | sad = (struct short_ad *)ptr; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1883 | sad->extLength = cpu_to_le32(elen); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1884 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1885 | adsize = sizeof(struct short_ad); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1886 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1887 | case ICBTAG_FLAG_AD_LONG: |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1888 | lad = (struct long_ad *)ptr; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1889 | lad->extLength = cpu_to_le32(elen); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1890 | lad->extLocation = cpu_to_lelb(*eloc); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1891 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1892 | adsize = sizeof(struct long_ad); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1893 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1894 | default: |
Jan Kara | 7e49b6f | 2010-10-22 00:30:26 +0200 | [diff] [blame] | 1895 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | } |
| 1897 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1898 | if (epos->bh) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1899 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1900 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1901 | struct allocExtDesc *aed = |
| 1902 | (struct allocExtDesc *)epos->bh->b_data; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1903 | udf_update_tag(epos->bh->b_data, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1904 | le32_to_cpu(aed->lengthAllocDescs) + |
| 1905 | sizeof(struct allocExtDesc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | } |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1907 | mark_buffer_dirty_inode(epos->bh, inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1908 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | mark_inode_dirty(inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1910 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | |
| 1912 | if (inc) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1913 | epos->offset += adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | } |
| 1915 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1916 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1917 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | { |
| 1919 | int8_t etype; |
| 1920 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1921 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1922 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1923 | int block; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1924 | epos->block = *eloc; |
| 1925 | epos->offset = sizeof(struct allocExtDesc); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1926 | brelse(epos->bh); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1927 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1928 | epos->bh = udf_tread(inode->i_sb, block); |
| 1929 | if (!epos->bh) { |
| 1930 | udf_debug("reading block %d failed!\n", block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | return -1; |
| 1932 | } |
| 1933 | } |
| 1934 | |
| 1935 | return etype; |
| 1936 | } |
| 1937 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1938 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1939 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | { |
| 1941 | int alen; |
| 1942 | int8_t etype; |
| 1943 | uint8_t *ptr; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1944 | struct short_ad *sad; |
| 1945 | struct long_ad *lad; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1946 | struct udf_inode_info *iinfo = UDF_I(inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1947 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1948 | if (!epos->bh) { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1949 | if (!epos->offset) |
| 1950 | epos->offset = udf_file_entry_alloc_offset(inode); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1951 | ptr = iinfo->i_ext.i_data + epos->offset - |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1952 | udf_file_entry_alloc_offset(inode) + |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1953 | iinfo->i_lenEAttr; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1954 | alen = udf_file_entry_alloc_offset(inode) + |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1955 | iinfo->i_lenAlloc; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1956 | } else { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1957 | if (!epos->offset) |
| 1958 | epos->offset = sizeof(struct allocExtDesc); |
| 1959 | ptr = epos->bh->b_data + epos->offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1960 | alen = sizeof(struct allocExtDesc) + |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1961 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
| 1962 | lengthAllocDescs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | } |
| 1964 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1965 | switch (iinfo->i_alloc_type) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1966 | case ICBTAG_FLAG_AD_SHORT: |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1967 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
| 1968 | if (!sad) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | return -1; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1970 | etype = le32_to_cpu(sad->extLength) >> 30; |
| 1971 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1972 | eloc->partitionReferenceNum = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1973 | iinfo->i_location.partitionReferenceNum; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1974 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
| 1975 | break; |
| 1976 | case ICBTAG_FLAG_AD_LONG: |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1977 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
| 1978 | if (!lad) |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1979 | return -1; |
| 1980 | etype = le32_to_cpu(lad->extLength) >> 30; |
| 1981 | *eloc = lelb_to_cpu(lad->extLocation); |
| 1982 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; |
| 1983 | break; |
| 1984 | default: |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1985 | udf_debug("alloc_type = %d unsupported\n", |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1986 | iinfo->i_alloc_type); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1987 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | } |
| 1989 | |
| 1990 | return etype; |
| 1991 | } |
| 1992 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1993 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1994 | struct kernel_lb_addr neloc, uint32_t nelen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1996 | struct kernel_lb_addr oeloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | uint32_t oelen; |
| 1998 | int8_t etype; |
| 1999 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2000 | if (epos.bh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2001 | get_bh(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2003 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2004 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | neloc = oeloc; |
| 2006 | nelen = (etype << 30) | oelen; |
| 2007 | } |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2008 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2009 | brelse(epos.bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2010 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | return (nelen >> 30); |
| 2012 | } |
| 2013 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2014 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2015 | struct kernel_lb_addr eloc, uint32_t elen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2017 | struct extent_position oepos; |
| 2018 | int adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | int8_t etype; |
| 2020 | struct allocExtDesc *aed; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2021 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2023 | if (epos.bh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2024 | get_bh(epos.bh); |
| 2025 | get_bh(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | } |
| 2027 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2028 | iinfo = UDF_I(inode); |
| 2029 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2030 | adsize = sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2031 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2032 | adsize = sizeof(struct long_ad); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | else |
| 2034 | adsize = 0; |
| 2035 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2036 | oepos = epos; |
| 2037 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | return -1; |
| 2039 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2040 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2041 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2042 | if (oepos.bh != epos.bh) { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2043 | oepos.block = epos.block; |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2044 | brelse(oepos.bh); |
| 2045 | get_bh(epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2046 | oepos.bh = epos.bh; |
| 2047 | oepos.offset = epos.offset - adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | } |
| 2049 | } |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2050 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | elen = 0; |
| 2052 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2053 | if (epos.bh != oepos.bh) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2054 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
| 2055 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
| 2056 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2057 | if (!oepos.bh) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2058 | iinfo->i_lenAlloc -= (adsize * 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | mark_inode_dirty(inode); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2060 | } else { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2061 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
marcin.slusarz@gmail.com | c2104fd | 2008-01-30 22:03:57 +0100 | [diff] [blame] | 2062 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2063 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2064 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2065 | udf_update_tag(oepos.bh->b_data, |
| 2066 | oepos.offset - (2 * adsize)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | else |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2068 | udf_update_tag(oepos.bh->b_data, |
| 2069 | sizeof(struct allocExtDesc)); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2070 | mark_buffer_dirty_inode(oepos.bh, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2072 | } else { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2073 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2074 | if (!oepos.bh) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2075 | iinfo->i_lenAlloc -= adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | mark_inode_dirty(inode); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2077 | } else { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2078 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
marcin.slusarz@gmail.com | c2104fd | 2008-01-30 22:03:57 +0100 | [diff] [blame] | 2079 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2080 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2081 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2082 | udf_update_tag(oepos.bh->b_data, |
| 2083 | epos.offset - adsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | else |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2085 | udf_update_tag(oepos.bh->b_data, |
| 2086 | sizeof(struct allocExtDesc)); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2087 | mark_buffer_dirty_inode(oepos.bh, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | } |
| 2089 | } |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame] | 2090 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2091 | brelse(epos.bh); |
| 2092 | brelse(oepos.bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2093 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | return (elen >> 30); |
| 2095 | } |
| 2096 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2097 | int8_t inode_bmap(struct inode *inode, sector_t block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2098 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2099 | uint32_t *elen, sector_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2101 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2102 | loff_t lbcount = 0, bcount = |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2103 | (loff_t) block << blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | int8_t etype; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2105 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2107 | iinfo = UDF_I(inode); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2108 | pos->offset = 0; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2109 | pos->block = iinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2110 | pos->bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | *elen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2113 | do { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2114 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
| 2115 | if (etype == -1) { |
| 2116 | *offset = (bcount - lbcount) >> blocksize_bits; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 2117 | iinfo->i_lenExtents = lbcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | return -1; |
| 2119 | } |
| 2120 | lbcount += *elen; |
| 2121 | } while (lbcount <= bcount); |
| 2122 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2123 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | |
| 2125 | return etype; |
| 2126 | } |
| 2127 | |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 2128 | long udf_block_map(struct inode *inode, sector_t block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2130 | struct kernel_lb_addr eloc; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2131 | uint32_t elen; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 2132 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2133 | struct extent_position epos = {}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | int ret; |
| 2135 | |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 2136 | down_read(&UDF_I(inode)->i_data_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2138 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
| 2139 | (EXT_RECORDED_ALLOCATED >> 30)) |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2140 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | else |
| 2142 | ret = 0; |
| 2143 | |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 2144 | up_read(&UDF_I(inode)->i_data_sem); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2145 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2146 | |
| 2147 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) |
| 2148 | return udf_fixed_to_variable(ret); |
| 2149 | else |
| 2150 | return ret; |
| 2151 | } |