blob: 30ebde490f7f5ebc3a4b79331191706c180b5a8f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * inode.c
3 *
4 * PURPOSE
5 * Inode handling routines for the OSTA-UDF(tm) filesystem.
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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 Slusarz4b111112008-02-08 04:20:36 -080022 * 12/06/98 blf partition support in udf_iget, udf_block_map
23 * and udf_read_inode
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * 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>
34#include <linux/smp_lock.h>
35#include <linux/module.h>
36#include <linux/pagemap.h>
37#include <linux/buffer_head.h>
38#include <linux/writeback.h>
39#include <linux/slab.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020040#include <linux/crc-itu-t.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42#include "udf_i.h"
43#include "udf_sb.h"
44
45MODULE_AUTHOR("Ben Fennema");
46MODULE_DESCRIPTION("Universal Disk Format Filesystem");
47MODULE_LICENSE("GPL");
48
49#define EXTENT_MERGE_SIZE 5
50
51static mode_t udf_convert_permissions(struct fileEntry *);
52static int udf_update_inode(struct inode *, int);
53static void udf_fill_inode(struct inode *, struct buffer_head *);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -070054static int udf_alloc_i_data(struct inode *inode, size_t size);
Jan Kara60448b12007-05-08 00:35:13 -070055static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
Marcin Slusarz1ed16172008-02-08 04:20:48 -080056 sector_t *, int *);
Jan Karaff116fc2007-05-08 00:35:14 -070057static int8_t udf_insert_aext(struct inode *, struct extent_position,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070058 kernel_lb_addr, uint32_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059static void udf_split_extents(struct inode *, int *, int, int,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070060 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061static void udf_prealloc_extents(struct inode *, int, int,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070062 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static void udf_merge_extents(struct inode *,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070064 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static void udf_update_extents(struct inode *,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070066 kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
67 struct extent_position *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
69
Christoph Hellwigb1e32122008-02-22 12:38:48 +010070
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070071void udf_delete_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Mark Fashehfef26652005-09-09 13:01:31 -070073 truncate_inode_pages(&inode->i_data, 0);
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 if (is_bad_inode(inode))
76 goto no_delete;
77
78 inode->i_size = 0;
79 udf_truncate(inode);
80 lock_kernel();
81
82 udf_update_inode(inode, IS_SYNC(inode));
83 udf_free_inode(inode);
84
85 unlock_kernel();
86 return;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070087
88no_delete:
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 clear_inode(inode);
90}
91
Jan Kara74584ae2007-06-16 10:16:14 -070092/*
93 * If we are going to release inode from memory, we discard preallocation and
94 * truncate last inode extent to proper length. We could use drop_inode() but
95 * it's called under inode_lock and thus we cannot mark inode dirty there. We
96 * use clear_inode() but we have to make sure to write inode as it's not written
97 * automatically.
98 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099void udf_clear_inode(struct inode *inode)
100{
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800101 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 if (!(inode->i_sb->s_flags & MS_RDONLY)) {
103 lock_kernel();
Jan Kara74584ae2007-06-16 10:16:14 -0700104 /* Discard preallocation for directories, symlinks, etc. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 udf_discard_prealloc(inode);
Jan Kara74584ae2007-06-16 10:16:14 -0700106 udf_truncate_tail_extent(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 unlock_kernel();
Mike Galbraith32a8f242008-02-08 04:20:49 -0800108 write_inode_now(inode, 0);
Jan Kara52b19ac2008-09-23 18:24:08 +0200109 invalidate_inode_buffers(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800111 iinfo = UDF_I(inode);
112 kfree(iinfo->i_ext.i_data);
113 iinfo->i_ext.i_data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114}
115
116static int udf_writepage(struct page *page, struct writeback_control *wbc)
117{
118 return block_write_full_page(page, udf_get_block, wbc);
119}
120
121static int udf_readpage(struct file *file, struct page *page)
122{
123 return block_read_full_page(page, udf_get_block);
124}
125
Nick Pigginbe021ee2007-10-16 01:25:20 -0700126static int udf_write_begin(struct file *file, struct address_space *mapping,
127 loff_t pos, unsigned len, unsigned flags,
128 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129{
Nick Pigginbe021ee2007-10-16 01:25:20 -0700130 *pagep = NULL;
131 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
132 udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133}
134
135static sector_t udf_bmap(struct address_space *mapping, sector_t block)
136{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700137 return generic_block_bmap(mapping, block, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138}
139
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700140const struct address_space_operations udf_aops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700141 .readpage = udf_readpage,
142 .writepage = udf_writepage,
143 .sync_page = block_sync_page,
Nick Pigginbe021ee2007-10-16 01:25:20 -0700144 .write_begin = udf_write_begin,
145 .write_end = generic_write_end,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700146 .bmap = udf_bmap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147};
148
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700149void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150{
151 struct page *page;
152 char *kaddr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800153 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 struct writeback_control udf_wbc = {
155 .sync_mode = WB_SYNC_NONE,
156 .nr_to_write = 1,
157 };
158
159 /* from now on we have normal address_space methods */
160 inode->i_data.a_ops = &udf_aops;
161
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800162 if (!iinfo->i_lenAlloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800164 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800166 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 mark_inode_dirty(inode);
168 return;
169 }
170
171 page = grab_cache_page(inode->i_mapping, 0);
Matt Mackallcd7619d2005-05-01 08:59:01 -0700172 BUG_ON(!PageLocked(page));
173
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700174 if (!PageUptodate(page)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 kaddr = kmap(page);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800176 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 Torvalds1da177e2005-04-16 15:20:36 -0700180 flush_dcache_page(page);
181 SetPageUptodate(page);
182 kunmap(page);
183 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800184 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
185 iinfo->i_lenAlloc);
186 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800188 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800190 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192 inode->i_data.a_ops->writepage(page, &udf_wbc);
193 page_cache_release(page);
194
195 mark_inode_dirty(inode);
196}
197
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700198struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
199 int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200{
201 int newblock;
Jan Karaff116fc2007-05-08 00:35:14 -0700202 struct buffer_head *dbh = NULL;
203 kernel_lb_addr eloc;
204 uint32_t elen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 uint8_t alloctype;
Jan Karaff116fc2007-05-08 00:35:14 -0700206 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
208 struct udf_fileident_bh sfibh, dfibh;
Jan Karaaf793292008-02-08 04:20:50 -0800209 loff_t f_pos = udf_ext0_offset(inode);
210 int size = udf_ext0_offset(inode) + inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 struct fileIdentDesc cfi, *sfi, *dfi;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800212 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
214 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
215 alloctype = ICBTAG_FLAG_AD_SHORT;
216 else
217 alloctype = ICBTAG_FLAG_AD_LONG;
218
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700219 if (!inode->i_size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800220 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 mark_inode_dirty(inode);
222 return NULL;
223 }
224
225 /* alloc block, and copy data to it */
226 *block = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800227 iinfo->i_location.partitionReferenceNum,
228 iinfo->i_location.logicalBlockNum, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if (!(*block))
230 return NULL;
231 newblock = udf_get_pblock(inode->i_sb, *block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800232 iinfo->i_location.partitionReferenceNum,
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800233 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 if (!newblock)
235 return NULL;
236 dbh = udf_tgetblk(inode->i_sb, newblock);
237 if (!dbh)
238 return NULL;
239 lock_buffer(dbh);
240 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
241 set_buffer_uptodate(dbh);
242 unlock_buffer(dbh);
243 mark_buffer_dirty_inode(dbh, inode);
244
Marcin Slusarz4b111112008-02-08 04:20:36 -0800245 sfibh.soffset = sfibh.eoffset =
Jan Karaaf793292008-02-08 04:20:50 -0800246 f_pos & (inode->i_sb->s_blocksize - 1);
Jan Karaff116fc2007-05-08 00:35:14 -0700247 sfibh.sbh = sfibh.ebh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 dfibh.soffset = dfibh.eoffset = 0;
249 dfibh.sbh = dfibh.ebh = dbh;
Jan Karaaf793292008-02-08 04:20:50 -0800250 while (f_pos < size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800251 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800252 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
253 NULL, NULL, NULL);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700254 if (!sfi) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700255 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 return NULL;
257 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800258 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 sfi->descTag.tagLocation = cpu_to_le32(*block);
260 dfibh.soffset = dfibh.eoffset;
261 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
262 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
263 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800264 sfi->fileIdent +
265 le16_to_cpu(sfi->lengthOfImpUse))) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800266 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700267 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 return NULL;
269 }
270 }
271 mark_buffer_dirty_inode(dbh, inode);
272
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800273 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
274 iinfo->i_lenAlloc);
275 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 eloc.logicalBlockNum = *block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800277 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800278 iinfo->i_location.partitionReferenceNum;
Jan Kara05343c42008-02-08 04:20:51 -0800279 elen = inode->i_sb->s_blocksize;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800280 iinfo->i_lenExtents = elen;
Jan Karaff116fc2007-05-08 00:35:14 -0700281 epos.bh = NULL;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800282 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700283 epos.offset = udf_file_entry_alloc_offset(inode);
284 udf_add_aext(inode, &epos, eloc, elen, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 /* UniqueID stuff */
286
Jan Kara3bf25cb2007-05-08 00:35:16 -0700287 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 mark_inode_dirty(inode);
289 return dbh;
290}
291
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700292static int udf_get_block(struct inode *inode, sector_t block,
293 struct buffer_head *bh_result, int create)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294{
295 int err, new;
296 struct buffer_head *bh;
Marcin Slusarz1ed16172008-02-08 04:20:48 -0800297 sector_t phys = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800298 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700300 if (!create) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 phys = udf_block_map(inode, block);
302 if (phys)
303 map_bh(bh_result, inode->i_sb, phys);
304 return 0;
305 }
306
307 err = -EIO;
308 new = 0;
309 bh = NULL;
310
311 lock_kernel();
312
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800313 iinfo = UDF_I(inode);
314 if (block == iinfo->i_next_alloc_block + 1) {
315 iinfo->i_next_alloc_block++;
316 iinfo->i_next_alloc_goal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 }
318
319 err = 0;
320
321 bh = inode_getblk(inode, block, &err, &phys, &new);
Eric Sesterhenn2c2111c2006-04-02 13:40:13 +0200322 BUG_ON(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 if (err)
324 goto abort;
Eric Sesterhenn2c2111c2006-04-02 13:40:13 +0200325 BUG_ON(!phys);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
327 if (new)
328 set_buffer_new(bh_result);
329 map_bh(bh_result, inode->i_sb, phys);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700330
331abort:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 unlock_kernel();
333 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334}
335
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700336static struct buffer_head *udf_getblk(struct inode *inode, long block,
337 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338{
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700339 struct buffer_head *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 struct buffer_head dummy;
341
342 dummy.b_state = 0;
343 dummy.b_blocknr = -1000;
344 *err = udf_get_block(inode, block, &dummy, create);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700345 if (!*err && buffer_mapped(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700347 if (buffer_new(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 lock_buffer(bh);
349 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
350 set_buffer_uptodate(bh);
351 unlock_buffer(bh);
352 mark_buffer_dirty_inode(bh, inode);
353 }
354 return bh;
355 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700356
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 return NULL;
358}
359
Jan Kara31170b62007-05-08 00:35:21 -0700360/* Extend the file by 'blocks' blocks, return the number of extents added */
361int udf_extend_file(struct inode *inode, struct extent_position *last_pos,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800362 kernel_long_ad *last_ext, sector_t blocks)
Jan Kara31170b62007-05-08 00:35:21 -0700363{
364 sector_t add;
365 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
366 struct super_block *sb = inode->i_sb;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700367 kernel_lb_addr prealloc_loc = {};
Jan Kara31170b62007-05-08 00:35:21 -0700368 int prealloc_len = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800369 struct udf_inode_info *iinfo;
Jan Kara31170b62007-05-08 00:35:21 -0700370
371 /* The previous extent is fake and we should not extend by anything
372 * - there's nothing to do... */
373 if (!blocks && fake)
374 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700375
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800376 iinfo = UDF_I(inode);
Jan Kara31170b62007-05-08 00:35:21 -0700377 /* Round the last extent up to a multiple of block size */
378 if (last_ext->extLength & (sb->s_blocksize - 1)) {
379 last_ext->extLength =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700380 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
381 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
382 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800383 iinfo->i_lenExtents =
384 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700385 ~(sb->s_blocksize - 1);
Jan Kara31170b62007-05-08 00:35:21 -0700386 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700387
Jan Kara31170b62007-05-08 00:35:21 -0700388 /* Last extent are just preallocated blocks? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800389 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
390 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700391 /* Save the extent so that we can reattach it to the end */
392 prealloc_loc = last_ext->extLocation;
393 prealloc_len = last_ext->extLength;
394 /* Mark the extent as a hole */
395 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700396 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
Jan Kara31170b62007-05-08 00:35:21 -0700397 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800398 last_ext->extLocation.partitionReferenceNum = 0;
Jan Kara31170b62007-05-08 00:35:21 -0700399 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700400
Jan Kara31170b62007-05-08 00:35:21 -0700401 /* Can we merge with the previous extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800402 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
403 EXT_NOT_RECORDED_NOT_ALLOCATED) {
404 add = ((1 << 30) - sb->s_blocksize -
405 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
406 sb->s_blocksize_bits;
Jan Kara31170b62007-05-08 00:35:21 -0700407 if (add > blocks)
408 add = blocks;
409 blocks -= add;
410 last_ext->extLength += add << sb->s_blocksize_bits;
411 }
412
413 if (fake) {
414 udf_add_aext(inode, last_pos, last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700415 last_ext->extLength, 1);
Jan Kara31170b62007-05-08 00:35:21 -0700416 count++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800417 } else
418 udf_write_aext(inode, last_pos, last_ext->extLocation,
419 last_ext->extLength, 1);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700420
Jan Kara31170b62007-05-08 00:35:21 -0700421 /* Managed to do everything necessary? */
422 if (!blocks)
423 goto out;
424
425 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
426 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800427 last_ext->extLocation.partitionReferenceNum = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700428 add = (1 << (30-sb->s_blocksize_bits)) - 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800429 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
430 (add << sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700431
Jan Kara31170b62007-05-08 00:35:21 -0700432 /* Create enough extents to cover the whole hole */
433 while (blocks > add) {
434 blocks -= add;
435 if (udf_add_aext(inode, last_pos, last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700436 last_ext->extLength, 1) == -1)
Jan Kara31170b62007-05-08 00:35:21 -0700437 return -1;
438 count++;
439 }
440 if (blocks) {
441 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700442 (blocks << sb->s_blocksize_bits);
Jan Kara31170b62007-05-08 00:35:21 -0700443 if (udf_add_aext(inode, last_pos, last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700444 last_ext->extLength, 1) == -1)
Jan Kara31170b62007-05-08 00:35:21 -0700445 return -1;
446 count++;
447 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700448
449out:
Jan Kara31170b62007-05-08 00:35:21 -0700450 /* Do we have some preallocated blocks saved? */
451 if (prealloc_len) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800452 if (udf_add_aext(inode, last_pos, prealloc_loc,
453 prealloc_len, 1) == -1)
Jan Kara31170b62007-05-08 00:35:21 -0700454 return -1;
455 last_ext->extLocation = prealloc_loc;
456 last_ext->extLength = prealloc_len;
457 count++;
458 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700459
Jan Kara31170b62007-05-08 00:35:21 -0700460 /* last_pos should point to the last written extent... */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800461 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Jan Kara31170b62007-05-08 00:35:21 -0700462 last_pos->offset -= sizeof(short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800463 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Jan Kara31170b62007-05-08 00:35:21 -0700464 last_pos->offset -= sizeof(long_ad);
465 else
466 return -1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700467
Jan Kara31170b62007-05-08 00:35:21 -0700468 return count;
469}
470
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700471static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
Marcin Slusarz1ed16172008-02-08 04:20:48 -0800472 int *err, sector_t *phys, int *new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473{
Jan Kara31170b62007-05-08 00:35:21 -0700474 static sector_t last_block;
Jan Karaff116fc2007-05-08 00:35:14 -0700475 struct buffer_head *result = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 kernel_long_ad laarr[EXTENT_MERGE_SIZE];
Jan Karaff116fc2007-05-08 00:35:14 -0700477 struct extent_position prev_epos, cur_epos, next_epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 int count = 0, startnum = 0, endnum = 0;
Jan Kara85d71242007-06-01 00:46:29 -0700479 uint32_t elen = 0, tmpelen;
480 kernel_lb_addr eloc, tmpeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 int c = 1;
Jan Kara60448b12007-05-08 00:35:13 -0700482 loff_t lbcount = 0, b_off = 0;
483 uint32_t newblocknum, newblock;
484 sector_t offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800486 struct udf_inode_info *iinfo = UDF_I(inode);
487 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
Jan Kara31170b62007-05-08 00:35:21 -0700488 int lastblock = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Jan Karaff116fc2007-05-08 00:35:14 -0700490 prev_epos.offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800491 prev_epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700492 prev_epos.bh = NULL;
493 cur_epos = next_epos = prev_epos;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700494 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
496 /* find the extent which contains the block we are looking for.
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700497 alternate between laarr[0] and laarr[1] for locations of the
498 current extent, and the previous extent */
499 do {
500 if (prev_epos.bh != cur_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700501 brelse(prev_epos.bh);
502 get_bh(cur_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700503 prev_epos.bh = cur_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700505 if (cur_epos.bh != next_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700506 brelse(cur_epos.bh);
507 get_bh(next_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700508 cur_epos.bh = next_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 }
510
511 lbcount += elen;
512
Jan Karaff116fc2007-05-08 00:35:14 -0700513 prev_epos.block = cur_epos.block;
514 cur_epos.block = next_epos.block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
Jan Karaff116fc2007-05-08 00:35:14 -0700516 prev_epos.offset = cur_epos.offset;
517 cur_epos.offset = next_epos.offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
Marcin Slusarz4b111112008-02-08 04:20:36 -0800519 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
520 if (etype == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 break;
522
523 c = !c;
524
525 laarr[c].extLength = (etype << 30) | elen;
526 laarr[c].extLocation = eloc;
527
528 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
529 pgoal = eloc.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700530 ((elen + inode->i_sb->s_blocksize - 1) >>
531 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700533 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 } while (lbcount + elen <= b_off);
535
536 b_off -= lbcount;
537 offset = b_off >> inode->i_sb->s_blocksize_bits;
Jan Kara85d71242007-06-01 00:46:29 -0700538 /*
539 * Move prev_epos and cur_epos into indirect extent if we are at
540 * the pointer to it
541 */
542 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
543 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544
545 /* if the extent is allocated and recorded, return the block
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700546 if the extent is not a multiple of the blocksize, round up */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700548 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
549 if (elen & (inode->i_sb->s_blocksize - 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 elen = EXT_RECORDED_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700551 ((elen + inode->i_sb->s_blocksize - 1) &
552 ~(inode->i_sb->s_blocksize - 1));
Jan Karaff116fc2007-05-08 00:35:14 -0700553 etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 }
Jan Kara3bf25cb2007-05-08 00:35:16 -0700555 brelse(prev_epos.bh);
556 brelse(cur_epos.bh);
557 brelse(next_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset);
559 *phys = newblock;
560 return NULL;
561 }
562
Jan Kara31170b62007-05-08 00:35:21 -0700563 last_block = block;
564 /* Are we beyond EOF? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700565 if (etype == -1) {
Jan Kara31170b62007-05-08 00:35:21 -0700566 int ret;
567
568 if (count) {
569 if (c)
570 laarr[0] = laarr[1];
571 startnum = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700572 } else {
Jan Kara31170b62007-05-08 00:35:21 -0700573 /* Create a fake extent when there's not one */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800574 memset(&laarr[0].extLocation, 0x00,
575 sizeof(kernel_lb_addr));
Jan Kara31170b62007-05-08 00:35:21 -0700576 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800577 /* Will udf_extend_file() create real extent from
578 a fake one? */
Jan Kara31170b62007-05-08 00:35:21 -0700579 startnum = (offset > 0);
580 }
581 /* Create extents for the hole between EOF and offset */
582 ret = udf_extend_file(inode, &prev_epos, laarr, offset);
583 if (ret == -1) {
584 brelse(prev_epos.bh);
585 brelse(cur_epos.bh);
586 brelse(next_epos.bh);
587 /* We don't really know the error here so we just make
588 * something up */
589 *err = -ENOSPC;
590 return NULL;
591 }
592 c = 0;
593 offset = 0;
594 count += ret;
595 /* We are not covered by a preallocated extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800596 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
597 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700598 /* Is there any real extent? - otherwise we overwrite
599 * the fake one... */
600 if (count)
601 c = !c;
602 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700603 inode->i_sb->s_blocksize;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800604 memset(&laarr[c].extLocation, 0x00,
605 sizeof(kernel_lb_addr));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700606 count++;
607 endnum++;
Jan Kara31170b62007-05-08 00:35:21 -0700608 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700609 endnum = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 lastblock = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700611 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 endnum = startnum = ((count > 2) ? 2 : count);
613
Marcin Slusarz4b111112008-02-08 04:20:36 -0800614 /* if the current extent is in position 0,
615 swap it with the previous */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700616 if (!c && count != 1) {
Jan Kara31170b62007-05-08 00:35:21 -0700617 laarr[2] = laarr[0];
618 laarr[0] = laarr[1];
619 laarr[1] = laarr[2];
620 c = 1;
621 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
Marcin Slusarz4b111112008-02-08 04:20:36 -0800623 /* if the current block is located in an extent,
624 read the next extent */
625 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
626 if (etype != -1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700627 laarr[c + 1].extLength = (etype << 30) | elen;
628 laarr[c + 1].extLocation = eloc;
629 count++;
630 startnum++;
631 endnum++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800632 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 lastblock = 1;
634 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635
636 /* if the current extent is not recorded but allocated, get the
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700637 * block in the extent corresponding to the requested block */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800638 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800640 else { /* otherwise, allocate a new block */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800641 if (iinfo->i_next_alloc_block == block)
642 goal = iinfo->i_next_alloc_goal;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700644 if (!goal) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800645 if (!(goal = pgoal)) /* XXX: what was intended here? */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800646 goal = iinfo->i_location.logicalBlockNum + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 }
648
Marcin Slusarz4b111112008-02-08 04:20:36 -0800649 newblocknum = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800650 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800651 goal, err);
652 if (!newblocknum) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700653 brelse(prev_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 *err = -ENOSPC;
655 return NULL;
656 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800657 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 }
659
Marcin Slusarz4b111112008-02-08 04:20:36 -0800660 /* if the extent the requsted block is located in contains multiple
661 * blocks, split the extent into at most three extents. blocks prior
662 * to requested block, requested block, and blocks after requested
663 * block */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
665
666#ifdef UDF_PREALLOCATE
667 /* preallocate blocks */
668 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
669#endif
670
671 /* merge any continuous blocks in laarr */
672 udf_merge_extents(inode, laarr, &endnum);
673
674 /* write back the new extents, inserting new extents if the new number
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700675 * of extents is greater than the old number, and deleting extents if
676 * the new number of extents is less than the old number */
Jan Karaff116fc2007-05-08 00:35:14 -0700677 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Jan Kara3bf25cb2007-05-08 00:35:16 -0700679 brelse(prev_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Marcin Slusarz4b111112008-02-08 04:20:36 -0800681 newblock = udf_get_pblock(inode->i_sb, newblocknum,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800682 iinfo->i_location.partitionReferenceNum, 0);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800683 if (!newblock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 *phys = newblock;
686 *err = 0;
687 *new = 1;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800688 iinfo->i_next_alloc_block = block;
689 iinfo->i_next_alloc_goal = newblocknum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 inode->i_ctime = current_fs_time(inode->i_sb);
691
692 if (IS_SYNC(inode))
693 udf_sync_inode(inode);
694 else
695 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700696
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 return result;
698}
699
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700700static void udf_split_extents(struct inode *inode, int *c, int offset,
701 int newblocknum,
702 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
703 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800705 unsigned long blocksize = inode->i_sb->s_blocksize;
706 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
Marcin Slusarz4b111112008-02-08 04:20:36 -0800709 (laarr[*c].extLength >> 30) ==
710 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 int curr = *c;
712 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800713 blocksize - 1) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 int8_t etype = (laarr[curr].extLength >> 30);
715
Marcin Slusarz4b111112008-02-08 04:20:36 -0800716 if (blen == 1)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700717 ;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800718 else if (!offset || blen == offset + 1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700719 laarr[curr + 2] = laarr[curr + 1];
720 laarr[curr + 1] = laarr[curr];
721 } else {
722 laarr[curr + 3] = laarr[curr + 1];
723 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 }
725
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700726 if (offset) {
727 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800728 udf_free_blocks(inode->i_sb, inode,
729 laarr[curr].extLocation,
730 0, offset);
731 laarr[curr].extLength =
732 EXT_NOT_RECORDED_NOT_ALLOCATED |
733 (offset << blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 laarr[curr].extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800735 laarr[curr].extLocation.
736 partitionReferenceNum = 0;
737 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800739 (offset << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700740 curr++;
741 (*c)++;
742 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -0700744
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 laarr[curr].extLocation.logicalBlockNum = newblocknum;
746 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
747 laarr[curr].extLocation.partitionReferenceNum =
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800748 UDF_I(inode)->i_location.partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800750 blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700751 curr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700753 if (blen != offset + 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800755 laarr[curr].extLocation.logicalBlockNum +=
756 offset + 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700757 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800758 ((blen - (offset + 1)) << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700759 curr++;
760 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 }
762 }
763}
764
765static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700766 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
767 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768{
769 int start, length = 0, currlength = 0, i;
770
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700771 if (*endnum >= (c + 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 if (!lastblock)
773 return;
774 else
775 start = c;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700776 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800777 if ((laarr[c + 1].extLength >> 30) ==
778 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700779 start = c + 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800780 length = currlength =
781 (((laarr[c + 1].extLength &
782 UDF_EXTENT_LENGTH_MASK) +
783 inode->i_sb->s_blocksize - 1) >>
784 inode->i_sb->s_blocksize_bits);
785 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 start = c;
787 }
788
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700789 for (i = start + 1; i <= *endnum; i++) {
790 if (i == *endnum) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 if (lastblock)
792 length += UDF_DEFAULT_PREALLOC_BLOCKS;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800793 } else if ((laarr[i].extLength >> 30) ==
794 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
795 length += (((laarr[i].extLength &
796 UDF_EXTENT_LENGTH_MASK) +
797 inode->i_sb->s_blocksize - 1) >>
798 inode->i_sb->s_blocksize_bits);
799 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 break;
801 }
802
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700803 if (length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 int next = laarr[start].extLocation.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700805 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800806 inode->i_sb->s_blocksize - 1) >>
807 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800809 laarr[start].extLocation.partitionReferenceNum,
810 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
811 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
812 currlength);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700813 if (numalloc) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800814 if (start == (c + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 laarr[start].extLength +=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800816 (numalloc <<
817 inode->i_sb->s_blocksize_bits);
818 else {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700819 memmove(&laarr[c + 2], &laarr[c + 1],
820 sizeof(long_ad) * (*endnum - (c + 1)));
821 (*endnum)++;
822 laarr[c + 1].extLocation.logicalBlockNum = next;
823 laarr[c + 1].extLocation.partitionReferenceNum =
Marcin Slusarz4b111112008-02-08 04:20:36 -0800824 laarr[c].extLocation.
825 partitionReferenceNum;
826 laarr[c + 1].extLength =
827 EXT_NOT_RECORDED_ALLOCATED |
828 (numalloc <<
829 inode->i_sb->s_blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700830 start = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 }
832
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700833 for (i = start + 1; numalloc && i < *endnum; i++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800834 int elen = ((laarr[i].extLength &
835 UDF_EXTENT_LENGTH_MASK) +
836 inode->i_sb->s_blocksize - 1) >>
837 inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700839 if (elen > numalloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 laarr[i].extLength -=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800841 (numalloc <<
842 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 numalloc = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700844 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 numalloc -= elen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700846 if (*endnum > (i + 1))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800847 memmove(&laarr[i],
848 &laarr[i + 1],
849 sizeof(long_ad) *
850 (*endnum - (i + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700851 i--;
852 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 }
854 }
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800855 UDF_I(inode)->i_lenExtents +=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800856 numalloc << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 }
858 }
859}
860
861static void udf_merge_extents(struct inode *inode,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700862 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
863 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864{
865 int i;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800866 unsigned long blocksize = inode->i_sb->s_blocksize;
867 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700869 for (i = 0; i < (*endnum - 1); i++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800870 kernel_long_ad *li /*l[i]*/ = &laarr[i];
871 kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
Marcin Slusarz4b111112008-02-08 04:20:36 -0800873 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
874 (((li->extLength >> 30) ==
875 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
876 ((lip1->extLocation.logicalBlockNum -
877 li->extLocation.logicalBlockNum) ==
878 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
879 blocksize - 1) >> blocksize_bits)))) {
880
881 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
882 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
883 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
884 lip1->extLength = (lip1->extLength -
885 (li->extLength &
886 UDF_EXTENT_LENGTH_MASK) +
887 UDF_EXTENT_LENGTH_MASK) &
888 ~(blocksize - 1);
889 li->extLength = (li->extLength &
890 UDF_EXTENT_FLAG_MASK) +
891 (UDF_EXTENT_LENGTH_MASK + 1) -
892 blocksize;
893 lip1->extLocation.logicalBlockNum =
894 li->extLocation.logicalBlockNum +
895 ((li->extLength &
896 UDF_EXTENT_LENGTH_MASK) >>
897 blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700898 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800899 li->extLength = lip1->extLength +
900 (((li->extLength &
901 UDF_EXTENT_LENGTH_MASK) +
902 blocksize - 1) & ~(blocksize - 1));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700903 if (*endnum > (i + 2))
904 memmove(&laarr[i + 1], &laarr[i + 2],
Marcin Slusarz4b111112008-02-08 04:20:36 -0800905 sizeof(long_ad) *
906 (*endnum - (i + 2)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700907 i--;
908 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 }
Marcin Slusarz4b111112008-02-08 04:20:36 -0800910 } else if (((li->extLength >> 30) ==
911 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
912 ((lip1->extLength >> 30) ==
913 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
914 udf_free_blocks(inode->i_sb, inode, li->extLocation, 0,
915 ((li->extLength &
916 UDF_EXTENT_LENGTH_MASK) +
917 blocksize - 1) >> blocksize_bits);
918 li->extLocation.logicalBlockNum = 0;
919 li->extLocation.partitionReferenceNum = 0;
920
921 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
922 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
923 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
924 lip1->extLength = (lip1->extLength -
925 (li->extLength &
926 UDF_EXTENT_LENGTH_MASK) +
927 UDF_EXTENT_LENGTH_MASK) &
928 ~(blocksize - 1);
929 li->extLength = (li->extLength &
930 UDF_EXTENT_FLAG_MASK) +
931 (UDF_EXTENT_LENGTH_MASK + 1) -
932 blocksize;
933 } else {
934 li->extLength = lip1->extLength +
935 (((li->extLength &
936 UDF_EXTENT_LENGTH_MASK) +
937 blocksize - 1) & ~(blocksize - 1));
938 if (*endnum > (i + 2))
939 memmove(&laarr[i + 1], &laarr[i + 2],
940 sizeof(long_ad) *
941 (*endnum - (i + 2)));
942 i--;
943 (*endnum)--;
944 }
945 } else if ((li->extLength >> 30) ==
946 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
947 udf_free_blocks(inode->i_sb, inode,
948 li->extLocation, 0,
949 ((li->extLength &
950 UDF_EXTENT_LENGTH_MASK) +
951 blocksize - 1) >> blocksize_bits);
952 li->extLocation.logicalBlockNum = 0;
953 li->extLocation.partitionReferenceNum = 0;
954 li->extLength = (li->extLength &
955 UDF_EXTENT_LENGTH_MASK) |
956 EXT_NOT_RECORDED_NOT_ALLOCATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 }
958 }
959}
960
961static void udf_update_extents(struct inode *inode,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700962 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
963 int startnum, int endnum,
964 struct extent_position *epos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965{
966 int start = 0, i;
967 kernel_lb_addr tmploc;
968 uint32_t tmplen;
969
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700970 if (startnum > endnum) {
971 for (i = 0; i < (startnum - endnum); i++)
Jan Karaff116fc2007-05-08 00:35:14 -0700972 udf_delete_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700973 laarr[i].extLength);
974 } else if (startnum < endnum) {
975 for (i = 0; i < (endnum - startnum); i++) {
Jan Karaff116fc2007-05-08 00:35:14 -0700976 udf_insert_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700977 laarr[i].extLength);
Jan Karaff116fc2007-05-08 00:35:14 -0700978 udf_next_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700979 &laarr[i].extLength, 1);
980 start++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 }
982 }
983
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700984 for (i = start; i < endnum; i++) {
Jan Karaff116fc2007-05-08 00:35:14 -0700985 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
986 udf_write_aext(inode, epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700987 laarr[i].extLength, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 }
989}
990
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700991struct buffer_head *udf_bread(struct inode *inode, int block,
992 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700994 struct buffer_head *bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
996 bh = udf_getblk(inode, block, create, err);
997 if (!bh)
998 return NULL;
999
1000 if (buffer_uptodate(bh))
1001 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001002
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 ll_rw_block(READ, 1, &bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001004
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 wait_on_buffer(bh);
1006 if (buffer_uptodate(bh))
1007 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001008
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 brelse(bh);
1010 *err = -EIO;
1011 return NULL;
1012}
1013
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001014void udf_truncate(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015{
1016 int offset;
1017 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001018 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
1020 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001021 S_ISLNK(inode->i_mode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 return;
1023 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1024 return;
1025
1026 lock_kernel();
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001027 iinfo = UDF_I(inode);
1028 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001029 if (inode->i_sb->s_blocksize <
1030 (udf_file_entry_alloc_offset(inode) +
1031 inode->i_size)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 udf_expand_file_adinicb(inode, inode->i_size, &err);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001033 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1034 inode->i_size = iinfo->i_lenAlloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 unlock_kernel();
1036 return;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001037 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 udf_truncate_extents(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001039 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 offset = inode->i_size & (inode->i_sb->s_blocksize - 1);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001041 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset,
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001042 0x00, inode->i_sb->s_blocksize -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001043 offset - udf_file_entry_alloc_offset(inode));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001044 iinfo->i_lenAlloc = inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001046 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001047 block_truncate_page(inode->i_mapping, inode->i_size,
1048 udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 udf_truncate_extents(inode);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001050 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051
1052 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1053 if (IS_SYNC(inode))
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001054 udf_sync_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 else
1056 mark_inode_dirty(inode);
1057 unlock_kernel();
1058}
1059
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001060static void __udf_read_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061{
1062 struct buffer_head *bh = NULL;
1063 struct fileEntry *fe;
1064 uint16_t ident;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001065 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066
1067 /*
1068 * Set defaults, but the inode is still incomplete!
1069 * Note: get_new_inode() sets the following on a new inode:
1070 * i_sb = sb
1071 * i_no = ino
1072 * i_flags = sb->s_flags
1073 * i_state = 0
1074 * clean_inode(): zero fills and sets
1075 * i_count = 1
1076 * i_nlink = 1
1077 * i_op = NULL;
1078 */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001079 bh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 0, &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001080 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001082 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 make_bad_inode(inode);
1084 return;
1085 }
1086
1087 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001088 ident != TAG_IDENT_USE) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001089 printk(KERN_ERR "udf: udf_read_inode(ino %ld) "
1090 "failed ident=%d\n", inode->i_ino, ident);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001091 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 make_bad_inode(inode);
1093 return;
1094 }
1095
1096 fe = (struct fileEntry *)bh->b_data;
1097
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001098 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001099 struct buffer_head *ibh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001101 ibh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 1,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001102 &ident);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001103 if (ident == TAG_IDENT_IE && ibh) {
1104 struct buffer_head *nbh = NULL;
1105 kernel_lb_addr loc;
1106 struct indirectEntry *ie;
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001107
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001108 ie = (struct indirectEntry *)ibh->b_data;
1109 loc = lelb_to_cpu(ie->indirectICB.extLocation);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001110
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001111 if (ie->indirectICB.extLength &&
1112 (nbh = udf_read_ptagged(inode->i_sb, loc, 0,
1113 &ident))) {
1114 if (ident == TAG_IDENT_FE ||
1115 ident == TAG_IDENT_EFE) {
1116 memcpy(&iinfo->i_location,
1117 &loc,
1118 sizeof(kernel_lb_addr));
1119 brelse(bh);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001120 brelse(ibh);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001121 brelse(nbh);
1122 __udf_read_inode(inode);
1123 return;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001124 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001125 brelse(nbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001127 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001128 brelse(ibh);
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001129 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 printk(KERN_ERR "udf: unsupported strategy type: %d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001131 le16_to_cpu(fe->icbTag.strategyType));
Jan Kara3bf25cb2007-05-08 00:35:16 -07001132 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 make_bad_inode(inode);
1134 return;
1135 }
1136 udf_fill_inode(inode, bh);
Jan Kara31170b62007-05-08 00:35:21 -07001137
Jan Kara3bf25cb2007-05-08 00:35:16 -07001138 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139}
1140
1141static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1142{
1143 struct fileEntry *fe;
1144 struct extendedFileEntry *efe;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 int offset;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001146 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001147 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
1149 fe = (struct fileEntry *)bh->b_data;
1150 efe = (struct extendedFileEntry *)bh->b_data;
1151
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001152 if (fe->icbTag.strategyType == cpu_to_le16(4))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001153 iinfo->i_strat4096 = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001154 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001155 iinfo->i_strat4096 = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001157 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
Marcin Slusarz4b111112008-02-08 04:20:36 -08001158 ICBTAG_FLAG_AD_MASK;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001159 iinfo->i_unique = 0;
1160 iinfo->i_lenEAttr = 0;
1161 iinfo->i_lenExtents = 0;
1162 iinfo->i_lenAlloc = 0;
1163 iinfo->i_next_alloc_block = 0;
1164 iinfo->i_next_alloc_goal = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001165 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001166 iinfo->i_efe = 1;
1167 iinfo->i_use = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001168 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1169 sizeof(struct extendedFileEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001170 make_bad_inode(inode);
1171 return;
1172 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001173 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001174 bh->b_data + sizeof(struct extendedFileEntry),
1175 inode->i_sb->s_blocksize -
1176 sizeof(struct extendedFileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001177 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001178 iinfo->i_efe = 0;
1179 iinfo->i_use = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001180 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1181 sizeof(struct fileEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001182 make_bad_inode(inode);
1183 return;
1184 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001185 memcpy(iinfo->i_ext.i_data,
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001186 bh->b_data + sizeof(struct fileEntry),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001187 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001188 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001189 iinfo->i_efe = 0;
1190 iinfo->i_use = 1;
1191 iinfo->i_lenAlloc = le32_to_cpu(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001192 ((struct unallocSpaceEntry *)bh->b_data)->
1193 lengthAllocDescs);
1194 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1195 sizeof(struct unallocSpaceEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001196 make_bad_inode(inode);
1197 return;
1198 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001199 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001200 bh->b_data + sizeof(struct unallocSpaceEntry),
1201 inode->i_sb->s_blocksize -
1202 sizeof(struct unallocSpaceEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 return;
1204 }
1205
1206 inode->i_uid = le32_to_cpu(fe->uid);
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001207 if (inode->i_uid == -1 ||
1208 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1209 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001210 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211
1212 inode->i_gid = le32_to_cpu(fe->gid);
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001213 if (inode->i_gid == -1 ||
1214 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1215 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001216 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217
1218 inode->i_nlink = le16_to_cpu(fe->fileLinkCount);
1219 if (!inode->i_nlink)
1220 inode->i_nlink = 1;
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001221
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 inode->i_size = le64_to_cpu(fe->informationLength);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001223 iinfo->i_lenExtents = inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
1225 inode->i_mode = udf_convert_permissions(fe);
1226 inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask;
1227
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001228 if (iinfo->i_efe == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001230 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231
Marcin Slusarz56774802008-02-10 11:25:31 +01001232 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001233 inode->i_atime = sbi->s_record_time;
1234
Marcin Slusarz56774802008-02-10 11:25:31 +01001235 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1236 fe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001237 inode->i_mtime = sbi->s_record_time;
1238
Marcin Slusarz56774802008-02-10 11:25:31 +01001239 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001240 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001242 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1243 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1244 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1245 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001246 } else {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001247 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001248 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
Marcin Slusarz56774802008-02-10 11:25:31 +01001250 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001251 inode->i_atime = sbi->s_record_time;
1252
Marcin Slusarz56774802008-02-10 11:25:31 +01001253 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1254 efe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001255 inode->i_mtime = sbi->s_record_time;
1256
Marcin Slusarz56774802008-02-10 11:25:31 +01001257 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001258 iinfo->i_crtime = sbi->s_record_time;
1259
Marcin Slusarz56774802008-02-10 11:25:31 +01001260 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001261 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001263 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1264 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1265 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001266 offset = sizeof(struct extendedFileEntry) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001267 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 }
1269
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001270 switch (fe->icbTag.fileType) {
1271 case ICBTAG_FILE_TYPE_DIRECTORY:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001272 inode->i_op = &udf_dir_inode_operations;
1273 inode->i_fop = &udf_dir_operations;
1274 inode->i_mode |= S_IFDIR;
1275 inc_nlink(inode);
1276 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001277 case ICBTAG_FILE_TYPE_REALTIME:
1278 case ICBTAG_FILE_TYPE_REGULAR:
1279 case ICBTAG_FILE_TYPE_UNDEF:
Jan Kara742e1792008-04-08 01:17:52 +02001280 case ICBTAG_FILE_TYPE_VAT20:
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001281 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001282 inode->i_data.a_ops = &udf_adinicb_aops;
1283 else
1284 inode->i_data.a_ops = &udf_aops;
1285 inode->i_op = &udf_file_inode_operations;
1286 inode->i_fop = &udf_file_operations;
1287 inode->i_mode |= S_IFREG;
1288 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001289 case ICBTAG_FILE_TYPE_BLOCK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001290 inode->i_mode |= S_IFBLK;
1291 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001292 case ICBTAG_FILE_TYPE_CHAR:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001293 inode->i_mode |= S_IFCHR;
1294 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001295 case ICBTAG_FILE_TYPE_FIFO:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001296 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1297 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001298 case ICBTAG_FILE_TYPE_SOCKET:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001299 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1300 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001301 case ICBTAG_FILE_TYPE_SYMLINK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001302 inode->i_data.a_ops = &udf_symlink_aops;
1303 inode->i_op = &page_symlink_inode_operations;
1304 inode->i_mode = S_IFLNK | S_IRWXUGO;
1305 break;
Jan Karabfb257a2008-04-08 20:37:21 +02001306 case ICBTAG_FILE_TYPE_MAIN:
1307 udf_debug("METADATA FILE-----\n");
1308 break;
1309 case ICBTAG_FILE_TYPE_MIRROR:
1310 udf_debug("METADATA MIRROR FILE-----\n");
1311 break;
1312 case ICBTAG_FILE_TYPE_BITMAP:
1313 udf_debug("METADATA BITMAP FILE-----\n");
1314 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001315 default:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001316 printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown "
1317 "file type=%d\n", inode->i_ino,
1318 fe->icbTag.fileType);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001319 make_bad_inode(inode);
1320 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001322 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001323 struct deviceSpec *dsea =
1324 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001325 if (dsea) {
1326 init_special_inode(inode, inode->i_mode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001327 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1328 le32_to_cpu(dsea->minorDeviceIdent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 /* Developer ID ??? */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001330 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 make_bad_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 }
1333}
1334
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001335static int udf_alloc_i_data(struct inode *inode, size_t size)
1336{
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001337 struct udf_inode_info *iinfo = UDF_I(inode);
1338 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001339
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001340 if (!iinfo->i_ext.i_data) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001341 printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) "
1342 "no free memory\n", inode->i_ino);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001343 return -ENOMEM;
1344 }
1345
1346 return 0;
1347}
1348
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001349static mode_t udf_convert_permissions(struct fileEntry *fe)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350{
1351 mode_t mode;
1352 uint32_t permissions;
1353 uint32_t flags;
1354
1355 permissions = le32_to_cpu(fe->permissions);
1356 flags = le16_to_cpu(fe->icbTag.flags);
1357
Marcin Slusarz4b111112008-02-08 04:20:36 -08001358 mode = ((permissions) & S_IRWXO) |
1359 ((permissions >> 2) & S_IRWXG) |
1360 ((permissions >> 4) & S_IRWXU) |
1361 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1362 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1363 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364
1365 return mode;
1366}
1367
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001368int udf_write_inode(struct inode *inode, int sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369{
1370 int ret;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001371
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372 lock_kernel();
1373 ret = udf_update_inode(inode, sync);
1374 unlock_kernel();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001375
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 return ret;
1377}
1378
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001379int udf_sync_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380{
1381 return udf_update_inode(inode, 1);
1382}
1383
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001384static int udf_update_inode(struct inode *inode, int do_sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385{
1386 struct buffer_head *bh = NULL;
1387 struct fileEntry *fe;
1388 struct extendedFileEntry *efe;
1389 uint32_t udfperms;
1390 uint16_t icbflags;
1391 uint16_t crclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 int err = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001393 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001394 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001395 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
Marcin Slusarz4b111112008-02-08 04:20:36 -08001397 bh = udf_tread(inode->i_sb,
1398 udf_get_lb_pblock(inode->i_sb,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001399 iinfo->i_location, 0));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001400 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 udf_debug("bread failure\n");
1402 return -EIO;
1403 }
1404
1405 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
1406
1407 fe = (struct fileEntry *)bh->b_data;
1408 efe = (struct extendedFileEntry *)bh->b_data;
1409
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001410 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 struct unallocSpaceEntry *use =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001412 (struct unallocSpaceEntry *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001414 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001415 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001416 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001417 sizeof(struct unallocSpaceEntry));
1418 crclen = sizeof(struct unallocSpaceEntry) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001419 iinfo->i_lenAlloc - sizeof(tag);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001420 use->descTag.tagLocation = cpu_to_le32(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001421 iinfo->i_location.
Marcin Slusarz4b111112008-02-08 04:20:36 -08001422 logicalBlockNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 use->descTag.descCRCLength = cpu_to_le16(crclen);
Bob Copelandf845fce2008-04-17 09:47:48 +02001424 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
1425 sizeof(tag),
1426 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001427 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428
1429 mark_buffer_dirty(bh);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001430 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 return err;
1432 }
1433
Phillip Susi4d6660e2006-03-07 21:55:24 -08001434 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1435 fe->uid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001436 else
1437 fe->uid = cpu_to_le32(inode->i_uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438
Phillip Susi4d6660e2006-03-07 21:55:24 -08001439 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1440 fe->gid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001441 else
1442 fe->gid = cpu_to_le32(inode->i_gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443
Marcin Slusarz4b111112008-02-08 04:20:36 -08001444 udfperms = ((inode->i_mode & S_IRWXO)) |
1445 ((inode->i_mode & S_IRWXG) << 2) |
1446 ((inode->i_mode & S_IRWXU) << 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447
Marcin Slusarz4b111112008-02-08 04:20:36 -08001448 udfperms |= (le32_to_cpu(fe->permissions) &
1449 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1450 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1451 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 fe->permissions = cpu_to_le32(udfperms);
1453
1454 if (S_ISDIR(inode->i_mode))
1455 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1456 else
1457 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1458
1459 fe->informationLength = cpu_to_le64(inode->i_size);
1460
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001461 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 regid *eid;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001463 struct deviceSpec *dsea =
1464 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001465 if (!dsea) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 dsea = (struct deviceSpec *)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001467 udf_add_extendedattr(inode,
1468 sizeof(struct deviceSpec) +
1469 sizeof(regid), 12, 0x3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 dsea->attrType = cpu_to_le32(12);
1471 dsea->attrSubtype = 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001472 dsea->attrLength = cpu_to_le32(
1473 sizeof(struct deviceSpec) +
1474 sizeof(regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 dsea->impUseLength = cpu_to_le32(sizeof(regid));
1476 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001477 eid = (regid *)dsea->impUse;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 memset(eid, 0, sizeof(regid));
1479 strcpy(eid->ident, UDF_ID_DEVELOPER);
1480 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1481 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1482 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1483 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1484 }
1485
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001486 if (iinfo->i_efe == 0) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001487 memcpy(bh->b_data + sizeof(struct fileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001488 iinfo->i_ext.i_data,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001489 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001490 fe->logicalBlocksRecorded = cpu_to_le64(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001491 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1492 (blocksize_bits - 9));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
Marcin Slusarz56774802008-02-10 11:25:31 +01001494 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1495 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1496 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 memset(&(fe->impIdent), 0, sizeof(regid));
1498 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1499 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1500 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001501 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1502 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1503 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1505 crclen = sizeof(struct fileEntry);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001506 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001507 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001508 iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001509 inode->i_sb->s_blocksize -
1510 sizeof(struct extendedFileEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 efe->objectSize = cpu_to_le64(inode->i_size);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001512 efe->logicalBlocksRecorded = cpu_to_le64(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001513 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1514 (blocksize_bits - 9));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001516 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1517 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1518 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1519 iinfo->i_crtime = inode->i_atime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001520
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001521 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1522 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1523 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1524 iinfo->i_crtime = inode->i_mtime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001525
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001526 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1527 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1528 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1529 iinfo->i_crtime = inode->i_ctime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
Marcin Slusarz56774802008-02-10 11:25:31 +01001531 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1532 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1533 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1534 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
1536 memset(&(efe->impIdent), 0, sizeof(regid));
1537 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1538 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1539 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001540 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1541 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1542 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1544 crclen = sizeof(struct extendedFileEntry);
1545 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001546 if (iinfo->i_strat4096) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547 fe->icbTag.strategyType = cpu_to_le16(4096);
1548 fe->icbTag.strategyParameter = cpu_to_le16(1);
1549 fe->icbTag.numEntries = cpu_to_le16(2);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001550 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 fe->icbTag.strategyType = cpu_to_le16(4);
1552 fe->icbTag.numEntries = cpu_to_le16(1);
1553 }
1554
1555 if (S_ISDIR(inode->i_mode))
1556 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1557 else if (S_ISREG(inode->i_mode))
1558 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1559 else if (S_ISLNK(inode->i_mode))
1560 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1561 else if (S_ISBLK(inode->i_mode))
1562 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1563 else if (S_ISCHR(inode->i_mode))
1564 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1565 else if (S_ISFIFO(inode->i_mode))
1566 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1567 else if (S_ISSOCK(inode->i_mode))
1568 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1569
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001570 icbflags = iinfo->i_alloc_type |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001571 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1572 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1573 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1574 (le16_to_cpu(fe->icbTag.flags) &
1575 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1576 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577
1578 fe->icbTag.flags = cpu_to_le16(icbflags);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001579 if (sbi->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 fe->descTag.descVersion = cpu_to_le16(3);
1581 else
1582 fe->descTag.descVersion = cpu_to_le16(2);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001583 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001584 fe->descTag.tagLocation = cpu_to_le32(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001585 iinfo->i_location.logicalBlockNum);
1586 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc -
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001587 sizeof(tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 fe->descTag.descCRCLength = cpu_to_le16(crclen);
Bob Copelandf845fce2008-04-17 09:47:48 +02001589 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(tag),
1590 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001591 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592
1593 /* write the data blocks */
1594 mark_buffer_dirty(bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001595 if (do_sync) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 sync_dirty_buffer(bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001597 if (buffer_req(bh) && !buffer_uptodate(bh)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001598 printk(KERN_WARNING "IO error syncing udf inode "
1599 "[%s:%08lx]\n", inode->i_sb->s_id,
1600 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 err = -EIO;
1602 }
1603 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001604 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001605
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 return err;
1607}
1608
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001609struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610{
1611 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1612 struct inode *inode = iget_locked(sb, block);
1613
1614 if (!inode)
1615 return NULL;
1616
1617 if (inode->i_state & I_NEW) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001618 memcpy(&UDF_I(inode)->i_location, &ino, sizeof(kernel_lb_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 __udf_read_inode(inode);
1620 unlock_new_inode(inode);
1621 }
1622
1623 if (is_bad_inode(inode))
1624 goto out_iput;
1625
Marcin Slusarz4b111112008-02-08 04:20:36 -08001626 if (ino.logicalBlockNum >= UDF_SB(sb)->
1627 s_partmaps[ino.partitionReferenceNum].s_partition_len) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 udf_debug("block=%d, partition=%d out of range\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001629 ino.logicalBlockNum, ino.partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 make_bad_inode(inode);
1631 goto out_iput;
1632 }
1633
1634 return inode;
1635
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001636 out_iput:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 iput(inode);
1638 return NULL;
1639}
1640
Marcin Slusarz4b111112008-02-08 04:20:36 -08001641int8_t udf_add_aext(struct inode *inode, struct extent_position *epos,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001642 kernel_lb_addr eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643{
1644 int adsize;
1645 short_ad *sad = NULL;
1646 long_ad *lad = NULL;
1647 struct allocExtDesc *aed;
1648 int8_t etype;
1649 uint8_t *ptr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001650 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651
Jan Karaff116fc2007-05-08 00:35:14 -07001652 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001653 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001654 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001655 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 else
Jan Karaff116fc2007-05-08 00:35:14 -07001657 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001659 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660 adsize = sizeof(short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001661 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 adsize = sizeof(long_ad);
1663 else
1664 return -1;
1665
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001666 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 char *sptr, *dptr;
1668 struct buffer_head *nbh;
1669 int err, loffset;
Jan Karaff116fc2007-05-08 00:35:14 -07001670 kernel_lb_addr obloc = epos->block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671
Marcin Slusarz4b111112008-02-08 04:20:36 -08001672 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1673 obloc.partitionReferenceNum,
1674 obloc.logicalBlockNum, &err);
1675 if (!epos->block.logicalBlockNum)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 return -1;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001677 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1678 epos->block,
1679 0));
1680 if (!nbh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 lock_buffer(nbh);
1683 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1684 set_buffer_uptodate(nbh);
1685 unlock_buffer(nbh);
1686 mark_buffer_dirty_inode(nbh, inode);
1687
1688 aed = (struct allocExtDesc *)(nbh->b_data);
1689 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
Marcin Slusarz4b111112008-02-08 04:20:36 -08001690 aed->previousAllocExtLocation =
1691 cpu_to_le32(obloc.logicalBlockNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001692 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
Jan Karaff116fc2007-05-08 00:35:14 -07001693 loffset = epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 aed->lengthAllocDescs = cpu_to_le32(adsize);
1695 sptr = ptr - adsize;
1696 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1697 memcpy(dptr, sptr, adsize);
Jan Karaff116fc2007-05-08 00:35:14 -07001698 epos->offset = sizeof(struct allocExtDesc) + adsize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001699 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001700 loffset = epos->offset + adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 aed->lengthAllocDescs = cpu_to_le32(0);
1702 sptr = ptr;
Jan Karaff116fc2007-05-08 00:35:14 -07001703 epos->offset = sizeof(struct allocExtDesc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001705 if (epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001706 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001707 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001708 } else {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001709 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 mark_inode_dirty(inode);
1711 }
1712 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001713 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001715 epos->block.logicalBlockNum, sizeof(tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716 else
1717 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001718 epos->block.logicalBlockNum, sizeof(tag));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001719 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001720 case ICBTAG_FLAG_AD_SHORT:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001721 sad = (short_ad *)sptr;
1722 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1723 inode->i_sb->s_blocksize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001724 sad->extPosition =
1725 cpu_to_le32(epos->block.logicalBlockNum);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001726 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001727 case ICBTAG_FLAG_AD_LONG:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001728 lad = (long_ad *)sptr;
1729 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1730 inode->i_sb->s_blocksize);
1731 lad->extLocation = cpu_to_lelb(epos->block);
1732 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1733 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001735 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001736 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001737 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Jan Karaff116fc2007-05-08 00:35:14 -07001738 udf_update_tag(epos->bh->b_data, loffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001740 udf_update_tag(epos->bh->b_data,
1741 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001742 mark_buffer_dirty_inode(epos->bh, inode);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001743 brelse(epos->bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001744 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001746 }
Jan Karaff116fc2007-05-08 00:35:14 -07001747 epos->bh = nbh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 }
1749
Jan Karaff116fc2007-05-08 00:35:14 -07001750 etype = udf_write_aext(inode, epos, eloc, elen, inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001752 if (!epos->bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001753 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001755 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001756 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001757 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001758 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1759 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1760 udf_update_tag(epos->bh->b_data,
1761 epos->offset + (inc ? 0 : adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001763 udf_update_tag(epos->bh->b_data,
1764 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001765 mark_buffer_dirty_inode(epos->bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766 }
1767
1768 return etype;
1769}
1770
Marcin Slusarz4b111112008-02-08 04:20:36 -08001771int8_t udf_write_aext(struct inode *inode, struct extent_position *epos,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001772 kernel_lb_addr eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773{
1774 int adsize;
1775 uint8_t *ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001776 short_ad *sad;
1777 long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001778 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779
Jan Karaff116fc2007-05-08 00:35:14 -07001780 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001781 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001782 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001783 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 else
Jan Karaff116fc2007-05-08 00:35:14 -07001785 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001787 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001788 case ICBTAG_FLAG_AD_SHORT:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001789 sad = (short_ad *)ptr;
1790 sad->extLength = cpu_to_le32(elen);
1791 sad->extPosition = cpu_to_le32(eloc.logicalBlockNum);
1792 adsize = sizeof(short_ad);
1793 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001794 case ICBTAG_FLAG_AD_LONG:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001795 lad = (long_ad *)ptr;
1796 lad->extLength = cpu_to_le32(elen);
1797 lad->extLocation = cpu_to_lelb(eloc);
1798 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1799 adsize = sizeof(long_ad);
1800 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001801 default:
1802 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803 }
1804
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001805 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001806 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001807 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001808 struct allocExtDesc *aed =
1809 (struct allocExtDesc *)epos->bh->b_data;
Jan Karaff116fc2007-05-08 00:35:14 -07001810 udf_update_tag(epos->bh->b_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001811 le32_to_cpu(aed->lengthAllocDescs) +
1812 sizeof(struct allocExtDesc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813 }
Jan Karaff116fc2007-05-08 00:35:14 -07001814 mark_buffer_dirty_inode(epos->bh, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001815 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001817 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818
1819 if (inc)
Jan Karaff116fc2007-05-08 00:35:14 -07001820 epos->offset += adsize;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001821
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822 return (elen >> 30);
1823}
1824
Marcin Slusarz4b111112008-02-08 04:20:36 -08001825int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1826 kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827{
1828 int8_t etype;
1829
Jan Karaff116fc2007-05-08 00:35:14 -07001830 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001831 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001832 int block;
Jan Karaff116fc2007-05-08 00:35:14 -07001833 epos->block = *eloc;
1834 epos->offset = sizeof(struct allocExtDesc);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001835 brelse(epos->bh);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001836 block = udf_get_lb_pblock(inode->i_sb, epos->block, 0);
1837 epos->bh = udf_tread(inode->i_sb, block);
1838 if (!epos->bh) {
1839 udf_debug("reading block %d failed!\n", block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 return -1;
1841 }
1842 }
1843
1844 return etype;
1845}
1846
Marcin Slusarz4b111112008-02-08 04:20:36 -08001847int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
1848 kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849{
1850 int alen;
1851 int8_t etype;
1852 uint8_t *ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001853 short_ad *sad;
1854 long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001855 struct udf_inode_info *iinfo = UDF_I(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001856
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001857 if (!epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001858 if (!epos->offset)
1859 epos->offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001860 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001861 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001862 iinfo->i_lenEAttr;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001863 alen = udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001864 iinfo->i_lenAlloc;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001865 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001866 if (!epos->offset)
1867 epos->offset = sizeof(struct allocExtDesc);
1868 ptr = epos->bh->b_data + epos->offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001869 alen = sizeof(struct allocExtDesc) +
Marcin Slusarz4b111112008-02-08 04:20:36 -08001870 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
1871 lengthAllocDescs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872 }
1873
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001874 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001875 case ICBTAG_FLAG_AD_SHORT:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001876 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
1877 if (!sad)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 return -1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001879 etype = le32_to_cpu(sad->extLength) >> 30;
1880 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001881 eloc->partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001882 iinfo->i_location.partitionReferenceNum;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001883 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
1884 break;
1885 case ICBTAG_FLAG_AD_LONG:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001886 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
1887 if (!lad)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001888 return -1;
1889 etype = le32_to_cpu(lad->extLength) >> 30;
1890 *eloc = lelb_to_cpu(lad->extLocation);
1891 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
1892 break;
1893 default:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001894 udf_debug("alloc_type = %d unsupported\n",
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001895 iinfo->i_alloc_type);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001896 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 }
1898
1899 return etype;
1900}
1901
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001902static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
1903 kernel_lb_addr neloc, uint32_t nelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904{
1905 kernel_lb_addr oeloc;
1906 uint32_t oelen;
1907 int8_t etype;
1908
Jan Karaff116fc2007-05-08 00:35:14 -07001909 if (epos.bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001910 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001912 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
Jan Karaff116fc2007-05-08 00:35:14 -07001913 udf_write_aext(inode, &epos, neloc, nelen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 neloc = oeloc;
1915 nelen = (etype << 30) | oelen;
1916 }
Jan Karaff116fc2007-05-08 00:35:14 -07001917 udf_add_aext(inode, &epos, neloc, nelen, 1);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001918 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001919
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 return (nelen >> 30);
1921}
1922
Marcin Slusarz4b111112008-02-08 04:20:36 -08001923int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001924 kernel_lb_addr eloc, uint32_t elen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925{
Jan Karaff116fc2007-05-08 00:35:14 -07001926 struct extent_position oepos;
1927 int adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928 int8_t etype;
1929 struct allocExtDesc *aed;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001930 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001932 if (epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07001933 get_bh(epos.bh);
1934 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 }
1936
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001937 iinfo = UDF_I(inode);
1938 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939 adsize = sizeof(short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001940 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 adsize = sizeof(long_ad);
1942 else
1943 adsize = 0;
1944
Jan Karaff116fc2007-05-08 00:35:14 -07001945 oepos = epos;
1946 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 return -1;
1948
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001949 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
Jan Karaff116fc2007-05-08 00:35:14 -07001950 udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001951 if (oepos.bh != epos.bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001952 oepos.block = epos.block;
Jan Kara3bf25cb2007-05-08 00:35:16 -07001953 brelse(oepos.bh);
1954 get_bh(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -07001955 oepos.bh = epos.bh;
1956 oepos.offset = epos.offset - adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 }
1958 }
1959 memset(&eloc, 0x00, sizeof(kernel_lb_addr));
1960 elen = 0;
1961
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001962 if (epos.bh != oepos.bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001963 udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1);
1964 udf_write_aext(inode, &oepos, eloc, elen, 1);
1965 udf_write_aext(inode, &oepos, eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001966 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001967 iinfo->i_lenAlloc -= (adsize * 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001969 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001970 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001971 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001972 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001973 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08001974 udf_update_tag(oepos.bh->b_data,
1975 oepos.offset - (2 * adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001977 udf_update_tag(oepos.bh->b_data,
1978 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001979 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001981 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001982 udf_write_aext(inode, &oepos, eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001983 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001984 iinfo->i_lenAlloc -= adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001986 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001987 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001988 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001989 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001990 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08001991 udf_update_tag(oepos.bh->b_data,
1992 epos.offset - adsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001994 udf_update_tag(oepos.bh->b_data,
1995 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001996 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997 }
1998 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001999
Jan Kara3bf25cb2007-05-08 00:35:16 -07002000 brelse(epos.bh);
2001 brelse(oepos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002002
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 return (elen >> 30);
2004}
2005
Marcin Slusarz4b111112008-02-08 04:20:36 -08002006int8_t inode_bmap(struct inode *inode, sector_t block,
2007 struct extent_position *pos, kernel_lb_addr *eloc,
2008 uint32_t *elen, sector_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009{
Marcin Slusarz4b111112008-02-08 04:20:36 -08002010 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002011 loff_t lbcount = 0, bcount =
Marcin Slusarz4b111112008-02-08 04:20:36 -08002012 (loff_t) block << blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002014 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002016 iinfo = UDF_I(inode);
Jan Karaff116fc2007-05-08 00:35:14 -07002017 pos->offset = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002018 pos->block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002019 pos->bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 *elen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002022 do {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002023 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2024 if (etype == -1) {
2025 *offset = (bcount - lbcount) >> blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002026 iinfo->i_lenExtents = lbcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 return -1;
2028 }
2029 lbcount += *elen;
2030 } while (lbcount <= bcount);
2031
Marcin Slusarz4b111112008-02-08 04:20:36 -08002032 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033
2034 return etype;
2035}
2036
Jan Kara60448b12007-05-08 00:35:13 -07002037long udf_block_map(struct inode *inode, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038{
Jan Karaff116fc2007-05-08 00:35:14 -07002039 kernel_lb_addr eloc;
2040 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -07002041 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002042 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043 int ret;
2044
2045 lock_kernel();
2046
Marcin Slusarz4b111112008-02-08 04:20:36 -08002047 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2048 (EXT_RECORDED_ALLOCATED >> 30))
Jan Kara60448b12007-05-08 00:35:13 -07002049 ret = udf_get_lb_pblock(inode->i_sb, eloc, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 else
2051 ret = 0;
2052
2053 unlock_kernel();
Jan Kara3bf25cb2007-05-08 00:35:16 -07002054 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055
2056 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2057 return udf_fixed_to_variable(ret);
2058 else
2059 return ret;
2060}