blob: c150b6df6261f023e6b26a945f405adc08a76806 [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>
40
41#include "udf_i.h"
42#include "udf_sb.h"
43
44MODULE_AUTHOR("Ben Fennema");
45MODULE_DESCRIPTION("Universal Disk Format Filesystem");
46MODULE_LICENSE("GPL");
47
48#define EXTENT_MERGE_SIZE 5
49
50static mode_t udf_convert_permissions(struct fileEntry *);
51static int udf_update_inode(struct inode *, int);
52static void udf_fill_inode(struct inode *, struct buffer_head *);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -070053static int udf_alloc_i_data(struct inode *inode, size_t size);
Jan Kara60448b12007-05-08 00:35:13 -070054static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
Marcin Slusarz1ed16172008-02-08 04:20:48 -080055 sector_t *, int *);
Jan Karaff116fc2007-05-08 00:35:14 -070056static int8_t udf_insert_aext(struct inode *, struct extent_position,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070057 kernel_lb_addr, uint32_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058static void udf_split_extents(struct inode *, int *, int, int,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070059 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static void udf_prealloc_extents(struct inode *, int, int,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070061 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062static void udf_merge_extents(struct inode *,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070063 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064static void udf_update_extents(struct inode *,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070065 kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
66 struct extent_position *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
68
Christoph Hellwigb1e32122008-02-22 12:38:48 +010069
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070070void udf_delete_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
Mark Fashehfef26652005-09-09 13:01:31 -070072 truncate_inode_pages(&inode->i_data, 0);
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 if (is_bad_inode(inode))
75 goto no_delete;
76
77 inode->i_size = 0;
78 udf_truncate(inode);
79 lock_kernel();
80
81 udf_update_inode(inode, IS_SYNC(inode));
82 udf_free_inode(inode);
83
84 unlock_kernel();
85 return;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070086
87no_delete:
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 clear_inode(inode);
89}
90
Jan Kara74584ae2007-06-16 10:16:14 -070091/*
92 * If we are going to release inode from memory, we discard preallocation and
93 * truncate last inode extent to proper length. We could use drop_inode() but
94 * it's called under inode_lock and thus we cannot mark inode dirty there. We
95 * use clear_inode() but we have to make sure to write inode as it's not written
96 * automatically.
97 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070098void udf_clear_inode(struct inode *inode)
99{
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800100 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 if (!(inode->i_sb->s_flags & MS_RDONLY)) {
102 lock_kernel();
Jan Kara74584ae2007-06-16 10:16:14 -0700103 /* Discard preallocation for directories, symlinks, etc. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 udf_discard_prealloc(inode);
Jan Kara74584ae2007-06-16 10:16:14 -0700105 udf_truncate_tail_extent(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 unlock_kernel();
Mike Galbraith32a8f242008-02-08 04:20:49 -0800107 write_inode_now(inode, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800109 iinfo = UDF_I(inode);
110 kfree(iinfo->i_ext.i_data);
111 iinfo->i_ext.i_data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112}
113
114static int udf_writepage(struct page *page, struct writeback_control *wbc)
115{
116 return block_write_full_page(page, udf_get_block, wbc);
117}
118
119static int udf_readpage(struct file *file, struct page *page)
120{
121 return block_read_full_page(page, udf_get_block);
122}
123
Nick Pigginbe021ee2007-10-16 01:25:20 -0700124static int udf_write_begin(struct file *file, struct address_space *mapping,
125 loff_t pos, unsigned len, unsigned flags,
126 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{
Nick Pigginbe021ee2007-10-16 01:25:20 -0700128 *pagep = NULL;
129 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
130 udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131}
132
133static sector_t udf_bmap(struct address_space *mapping, sector_t block)
134{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700135 return generic_block_bmap(mapping, block, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136}
137
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700138const struct address_space_operations udf_aops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700139 .readpage = udf_readpage,
140 .writepage = udf_writepage,
141 .sync_page = block_sync_page,
Nick Pigginbe021ee2007-10-16 01:25:20 -0700142 .write_begin = udf_write_begin,
143 .write_end = generic_write_end,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700144 .bmap = udf_bmap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145};
146
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700147void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
149 struct page *page;
150 char *kaddr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800151 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 struct writeback_control udf_wbc = {
153 .sync_mode = WB_SYNC_NONE,
154 .nr_to_write = 1,
155 };
156
157 /* from now on we have normal address_space methods */
158 inode->i_data.a_ops = &udf_aops;
159
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800160 if (!iinfo->i_lenAlloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800162 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800164 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 mark_inode_dirty(inode);
166 return;
167 }
168
169 page = grab_cache_page(inode->i_mapping, 0);
Matt Mackallcd7619d2005-05-01 08:59:01 -0700170 BUG_ON(!PageLocked(page));
171
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700172 if (!PageUptodate(page)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 kaddr = kmap(page);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800174 memset(kaddr + iinfo->i_lenAlloc, 0x00,
175 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
176 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
177 iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 flush_dcache_page(page);
179 SetPageUptodate(page);
180 kunmap(page);
181 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800182 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
183 iinfo->i_lenAlloc);
184 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800186 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800188 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 inode->i_data.a_ops->writepage(page, &udf_wbc);
191 page_cache_release(page);
192
193 mark_inode_dirty(inode);
194}
195
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700196struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
197 int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198{
199 int newblock;
Jan Karaff116fc2007-05-08 00:35:14 -0700200 struct buffer_head *dbh = NULL;
201 kernel_lb_addr eloc;
202 uint32_t elen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 uint8_t alloctype;
Jan Karaff116fc2007-05-08 00:35:14 -0700204 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206 struct udf_fileident_bh sfibh, dfibh;
Jan Karaaf793292008-02-08 04:20:50 -0800207 loff_t f_pos = udf_ext0_offset(inode);
208 int size = udf_ext0_offset(inode) + inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 struct fileIdentDesc cfi, *sfi, *dfi;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800210 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
212 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
213 alloctype = ICBTAG_FLAG_AD_SHORT;
214 else
215 alloctype = ICBTAG_FLAG_AD_LONG;
216
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700217 if (!inode->i_size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800218 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 mark_inode_dirty(inode);
220 return NULL;
221 }
222
223 /* alloc block, and copy data to it */
224 *block = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800225 iinfo->i_location.partitionReferenceNum,
226 iinfo->i_location.logicalBlockNum, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 if (!(*block))
228 return NULL;
229 newblock = udf_get_pblock(inode->i_sb, *block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800230 iinfo->i_location.partitionReferenceNum,
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800231 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 if (!newblock)
233 return NULL;
234 dbh = udf_tgetblk(inode->i_sb, newblock);
235 if (!dbh)
236 return NULL;
237 lock_buffer(dbh);
238 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
239 set_buffer_uptodate(dbh);
240 unlock_buffer(dbh);
241 mark_buffer_dirty_inode(dbh, inode);
242
Marcin Slusarz4b111112008-02-08 04:20:36 -0800243 sfibh.soffset = sfibh.eoffset =
Jan Karaaf793292008-02-08 04:20:50 -0800244 f_pos & (inode->i_sb->s_blocksize - 1);
Jan Karaff116fc2007-05-08 00:35:14 -0700245 sfibh.sbh = sfibh.ebh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 dfibh.soffset = dfibh.eoffset = 0;
247 dfibh.sbh = dfibh.ebh = dbh;
Jan Karaaf793292008-02-08 04:20:50 -0800248 while (f_pos < size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800249 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800250 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
251 NULL, NULL, NULL);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700252 if (!sfi) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700253 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 return NULL;
255 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800256 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 sfi->descTag.tagLocation = cpu_to_le32(*block);
258 dfibh.soffset = dfibh.eoffset;
259 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
260 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
261 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800262 sfi->fileIdent +
263 le16_to_cpu(sfi->lengthOfImpUse))) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800264 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700265 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 return NULL;
267 }
268 }
269 mark_buffer_dirty_inode(dbh, inode);
270
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800271 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
272 iinfo->i_lenAlloc);
273 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 eloc.logicalBlockNum = *block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800275 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800276 iinfo->i_location.partitionReferenceNum;
Jan Kara05343c42008-02-08 04:20:51 -0800277 elen = inode->i_sb->s_blocksize;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800278 iinfo->i_lenExtents = elen;
Jan Karaff116fc2007-05-08 00:35:14 -0700279 epos.bh = NULL;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800280 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700281 epos.offset = udf_file_entry_alloc_offset(inode);
282 udf_add_aext(inode, &epos, eloc, elen, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 /* UniqueID stuff */
284
Jan Kara3bf25cb2007-05-08 00:35:16 -0700285 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 mark_inode_dirty(inode);
287 return dbh;
288}
289
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700290static int udf_get_block(struct inode *inode, sector_t block,
291 struct buffer_head *bh_result, int create)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292{
293 int err, new;
294 struct buffer_head *bh;
Marcin Slusarz1ed16172008-02-08 04:20:48 -0800295 sector_t phys = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800296 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700298 if (!create) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 phys = udf_block_map(inode, block);
300 if (phys)
301 map_bh(bh_result, inode->i_sb, phys);
302 return 0;
303 }
304
305 err = -EIO;
306 new = 0;
307 bh = NULL;
308
309 lock_kernel();
310
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800311 iinfo = UDF_I(inode);
312 if (block == iinfo->i_next_alloc_block + 1) {
313 iinfo->i_next_alloc_block++;
314 iinfo->i_next_alloc_goal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 }
316
317 err = 0;
318
319 bh = inode_getblk(inode, block, &err, &phys, &new);
Eric Sesterhenn2c2111c2006-04-02 13:40:13 +0200320 BUG_ON(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 if (err)
322 goto abort;
Eric Sesterhenn2c2111c2006-04-02 13:40:13 +0200323 BUG_ON(!phys);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
325 if (new)
326 set_buffer_new(bh_result);
327 map_bh(bh_result, inode->i_sb, phys);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700328
329abort:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 unlock_kernel();
331 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332}
333
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700334static struct buffer_head *udf_getblk(struct inode *inode, long block,
335 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336{
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700337 struct buffer_head *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 struct buffer_head dummy;
339
340 dummy.b_state = 0;
341 dummy.b_blocknr = -1000;
342 *err = udf_get_block(inode, block, &dummy, create);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700343 if (!*err && buffer_mapped(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700345 if (buffer_new(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 lock_buffer(bh);
347 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
348 set_buffer_uptodate(bh);
349 unlock_buffer(bh);
350 mark_buffer_dirty_inode(bh, inode);
351 }
352 return bh;
353 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 return NULL;
356}
357
Jan Kara31170b62007-05-08 00:35:21 -0700358/* Extend the file by 'blocks' blocks, return the number of extents added */
359int udf_extend_file(struct inode *inode, struct extent_position *last_pos,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800360 kernel_long_ad *last_ext, sector_t blocks)
Jan Kara31170b62007-05-08 00:35:21 -0700361{
362 sector_t add;
363 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
364 struct super_block *sb = inode->i_sb;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700365 kernel_lb_addr prealloc_loc = {};
Jan Kara31170b62007-05-08 00:35:21 -0700366 int prealloc_len = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800367 struct udf_inode_info *iinfo;
Jan Kara31170b62007-05-08 00:35:21 -0700368
369 /* The previous extent is fake and we should not extend by anything
370 * - there's nothing to do... */
371 if (!blocks && fake)
372 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700373
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800374 iinfo = UDF_I(inode);
Jan Kara31170b62007-05-08 00:35:21 -0700375 /* Round the last extent up to a multiple of block size */
376 if (last_ext->extLength & (sb->s_blocksize - 1)) {
377 last_ext->extLength =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700378 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
379 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
380 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800381 iinfo->i_lenExtents =
382 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700383 ~(sb->s_blocksize - 1);
Jan Kara31170b62007-05-08 00:35:21 -0700384 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700385
Jan Kara31170b62007-05-08 00:35:21 -0700386 /* Last extent are just preallocated blocks? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800387 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
388 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700389 /* Save the extent so that we can reattach it to the end */
390 prealloc_loc = last_ext->extLocation;
391 prealloc_len = last_ext->extLength;
392 /* Mark the extent as a hole */
393 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700394 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
Jan Kara31170b62007-05-08 00:35:21 -0700395 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800396 last_ext->extLocation.partitionReferenceNum = 0;
Jan Kara31170b62007-05-08 00:35:21 -0700397 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700398
Jan Kara31170b62007-05-08 00:35:21 -0700399 /* Can we merge with the previous extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800400 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
401 EXT_NOT_RECORDED_NOT_ALLOCATED) {
402 add = ((1 << 30) - sb->s_blocksize -
403 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
404 sb->s_blocksize_bits;
Jan Kara31170b62007-05-08 00:35:21 -0700405 if (add > blocks)
406 add = blocks;
407 blocks -= add;
408 last_ext->extLength += add << sb->s_blocksize_bits;
409 }
410
411 if (fake) {
412 udf_add_aext(inode, last_pos, last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700413 last_ext->extLength, 1);
Jan Kara31170b62007-05-08 00:35:21 -0700414 count++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800415 } else
416 udf_write_aext(inode, last_pos, last_ext->extLocation,
417 last_ext->extLength, 1);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700418
Jan Kara31170b62007-05-08 00:35:21 -0700419 /* Managed to do everything necessary? */
420 if (!blocks)
421 goto out;
422
423 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
424 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800425 last_ext->extLocation.partitionReferenceNum = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700426 add = (1 << (30-sb->s_blocksize_bits)) - 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800427 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
428 (add << sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700429
Jan Kara31170b62007-05-08 00:35:21 -0700430 /* Create enough extents to cover the whole hole */
431 while (blocks > add) {
432 blocks -= add;
433 if (udf_add_aext(inode, last_pos, last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700434 last_ext->extLength, 1) == -1)
Jan Kara31170b62007-05-08 00:35:21 -0700435 return -1;
436 count++;
437 }
438 if (blocks) {
439 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700440 (blocks << sb->s_blocksize_bits);
Jan Kara31170b62007-05-08 00:35:21 -0700441 if (udf_add_aext(inode, last_pos, last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700442 last_ext->extLength, 1) == -1)
Jan Kara31170b62007-05-08 00:35:21 -0700443 return -1;
444 count++;
445 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700446
447out:
Jan Kara31170b62007-05-08 00:35:21 -0700448 /* Do we have some preallocated blocks saved? */
449 if (prealloc_len) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800450 if (udf_add_aext(inode, last_pos, prealloc_loc,
451 prealloc_len, 1) == -1)
Jan Kara31170b62007-05-08 00:35:21 -0700452 return -1;
453 last_ext->extLocation = prealloc_loc;
454 last_ext->extLength = prealloc_len;
455 count++;
456 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700457
Jan Kara31170b62007-05-08 00:35:21 -0700458 /* last_pos should point to the last written extent... */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800459 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Jan Kara31170b62007-05-08 00:35:21 -0700460 last_pos->offset -= sizeof(short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800461 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Jan Kara31170b62007-05-08 00:35:21 -0700462 last_pos->offset -= sizeof(long_ad);
463 else
464 return -1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700465
Jan Kara31170b62007-05-08 00:35:21 -0700466 return count;
467}
468
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700469static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
Marcin Slusarz1ed16172008-02-08 04:20:48 -0800470 int *err, sector_t *phys, int *new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
Jan Kara31170b62007-05-08 00:35:21 -0700472 static sector_t last_block;
Jan Karaff116fc2007-05-08 00:35:14 -0700473 struct buffer_head *result = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 kernel_long_ad laarr[EXTENT_MERGE_SIZE];
Jan Karaff116fc2007-05-08 00:35:14 -0700475 struct extent_position prev_epos, cur_epos, next_epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 int count = 0, startnum = 0, endnum = 0;
Jan Kara85d71242007-06-01 00:46:29 -0700477 uint32_t elen = 0, tmpelen;
478 kernel_lb_addr eloc, tmpeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 int c = 1;
Jan Kara60448b12007-05-08 00:35:13 -0700480 loff_t lbcount = 0, b_off = 0;
481 uint32_t newblocknum, newblock;
482 sector_t offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800484 struct udf_inode_info *iinfo = UDF_I(inode);
485 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
Jan Kara31170b62007-05-08 00:35:21 -0700486 int lastblock = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
Jan Karaff116fc2007-05-08 00:35:14 -0700488 prev_epos.offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800489 prev_epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700490 prev_epos.bh = NULL;
491 cur_epos = next_epos = prev_epos;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700492 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
494 /* find the extent which contains the block we are looking for.
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700495 alternate between laarr[0] and laarr[1] for locations of the
496 current extent, and the previous extent */
497 do {
498 if (prev_epos.bh != cur_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700499 brelse(prev_epos.bh);
500 get_bh(cur_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700501 prev_epos.bh = cur_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700503 if (cur_epos.bh != next_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700504 brelse(cur_epos.bh);
505 get_bh(next_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700506 cur_epos.bh = next_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 }
508
509 lbcount += elen;
510
Jan Karaff116fc2007-05-08 00:35:14 -0700511 prev_epos.block = cur_epos.block;
512 cur_epos.block = next_epos.block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Jan Karaff116fc2007-05-08 00:35:14 -0700514 prev_epos.offset = cur_epos.offset;
515 cur_epos.offset = next_epos.offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Marcin Slusarz4b111112008-02-08 04:20:36 -0800517 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
518 if (etype == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 break;
520
521 c = !c;
522
523 laarr[c].extLength = (etype << 30) | elen;
524 laarr[c].extLocation = eloc;
525
526 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
527 pgoal = eloc.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700528 ((elen + inode->i_sb->s_blocksize - 1) >>
529 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700531 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 } while (lbcount + elen <= b_off);
533
534 b_off -= lbcount;
535 offset = b_off >> inode->i_sb->s_blocksize_bits;
Jan Kara85d71242007-06-01 00:46:29 -0700536 /*
537 * Move prev_epos and cur_epos into indirect extent if we are at
538 * the pointer to it
539 */
540 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
541 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542
543 /* if the extent is allocated and recorded, return the block
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700544 if the extent is not a multiple of the blocksize, round up */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700546 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
547 if (elen & (inode->i_sb->s_blocksize - 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 elen = EXT_RECORDED_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700549 ((elen + inode->i_sb->s_blocksize - 1) &
550 ~(inode->i_sb->s_blocksize - 1));
Jan Karaff116fc2007-05-08 00:35:14 -0700551 etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 }
Jan Kara3bf25cb2007-05-08 00:35:16 -0700553 brelse(prev_epos.bh);
554 brelse(cur_epos.bh);
555 brelse(next_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset);
557 *phys = newblock;
558 return NULL;
559 }
560
Jan Kara31170b62007-05-08 00:35:21 -0700561 last_block = block;
562 /* Are we beyond EOF? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700563 if (etype == -1) {
Jan Kara31170b62007-05-08 00:35:21 -0700564 int ret;
565
566 if (count) {
567 if (c)
568 laarr[0] = laarr[1];
569 startnum = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700570 } else {
Jan Kara31170b62007-05-08 00:35:21 -0700571 /* Create a fake extent when there's not one */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800572 memset(&laarr[0].extLocation, 0x00,
573 sizeof(kernel_lb_addr));
Jan Kara31170b62007-05-08 00:35:21 -0700574 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800575 /* Will udf_extend_file() create real extent from
576 a fake one? */
Jan Kara31170b62007-05-08 00:35:21 -0700577 startnum = (offset > 0);
578 }
579 /* Create extents for the hole between EOF and offset */
580 ret = udf_extend_file(inode, &prev_epos, laarr, offset);
581 if (ret == -1) {
582 brelse(prev_epos.bh);
583 brelse(cur_epos.bh);
584 brelse(next_epos.bh);
585 /* We don't really know the error here so we just make
586 * something up */
587 *err = -ENOSPC;
588 return NULL;
589 }
590 c = 0;
591 offset = 0;
592 count += ret;
593 /* We are not covered by a preallocated extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800594 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
595 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700596 /* Is there any real extent? - otherwise we overwrite
597 * the fake one... */
598 if (count)
599 c = !c;
600 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700601 inode->i_sb->s_blocksize;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800602 memset(&laarr[c].extLocation, 0x00,
603 sizeof(kernel_lb_addr));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700604 count++;
605 endnum++;
Jan Kara31170b62007-05-08 00:35:21 -0700606 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700607 endnum = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 lastblock = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700609 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 endnum = startnum = ((count > 2) ? 2 : count);
611
Marcin Slusarz4b111112008-02-08 04:20:36 -0800612 /* if the current extent is in position 0,
613 swap it with the previous */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700614 if (!c && count != 1) {
Jan Kara31170b62007-05-08 00:35:21 -0700615 laarr[2] = laarr[0];
616 laarr[0] = laarr[1];
617 laarr[1] = laarr[2];
618 c = 1;
619 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620
Marcin Slusarz4b111112008-02-08 04:20:36 -0800621 /* if the current block is located in an extent,
622 read the next extent */
623 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
624 if (etype != -1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700625 laarr[c + 1].extLength = (etype << 30) | elen;
626 laarr[c + 1].extLocation = eloc;
627 count++;
628 startnum++;
629 endnum++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800630 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 lastblock = 1;
632 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634 /* if the current extent is not recorded but allocated, get the
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700635 * block in the extent corresponding to the requested block */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800636 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800638 else { /* otherwise, allocate a new block */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800639 if (iinfo->i_next_alloc_block == block)
640 goal = iinfo->i_next_alloc_goal;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700642 if (!goal) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800643 if (!(goal = pgoal)) /* XXX: what was intended here? */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800644 goal = iinfo->i_location.logicalBlockNum + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 }
646
Marcin Slusarz4b111112008-02-08 04:20:36 -0800647 newblocknum = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800648 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800649 goal, err);
650 if (!newblocknum) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700651 brelse(prev_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 *err = -ENOSPC;
653 return NULL;
654 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800655 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 }
657
Marcin Slusarz4b111112008-02-08 04:20:36 -0800658 /* if the extent the requsted block is located in contains multiple
659 * blocks, split the extent into at most three extents. blocks prior
660 * to requested block, requested block, and blocks after requested
661 * block */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
663
664#ifdef UDF_PREALLOCATE
665 /* preallocate blocks */
666 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
667#endif
668
669 /* merge any continuous blocks in laarr */
670 udf_merge_extents(inode, laarr, &endnum);
671
672 /* write back the new extents, inserting new extents if the new number
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700673 * of extents is greater than the old number, and deleting extents if
674 * the new number of extents is less than the old number */
Jan Karaff116fc2007-05-08 00:35:14 -0700675 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
Jan Kara3bf25cb2007-05-08 00:35:16 -0700677 brelse(prev_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Marcin Slusarz4b111112008-02-08 04:20:36 -0800679 newblock = udf_get_pblock(inode->i_sb, newblocknum,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800680 iinfo->i_location.partitionReferenceNum, 0);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800681 if (!newblock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 *phys = newblock;
684 *err = 0;
685 *new = 1;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800686 iinfo->i_next_alloc_block = block;
687 iinfo->i_next_alloc_goal = newblocknum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 inode->i_ctime = current_fs_time(inode->i_sb);
689
690 if (IS_SYNC(inode))
691 udf_sync_inode(inode);
692 else
693 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 return result;
696}
697
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700698static void udf_split_extents(struct inode *inode, int *c, int offset,
699 int newblocknum,
700 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
701 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800703 unsigned long blocksize = inode->i_sb->s_blocksize;
704 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
Marcin Slusarz4b111112008-02-08 04:20:36 -0800707 (laarr[*c].extLength >> 30) ==
708 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 int curr = *c;
710 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800711 blocksize - 1) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 int8_t etype = (laarr[curr].extLength >> 30);
713
Marcin Slusarz4b111112008-02-08 04:20:36 -0800714 if (blen == 1)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700715 ;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800716 else if (!offset || blen == offset + 1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700717 laarr[curr + 2] = laarr[curr + 1];
718 laarr[curr + 1] = laarr[curr];
719 } else {
720 laarr[curr + 3] = laarr[curr + 1];
721 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 }
723
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700724 if (offset) {
725 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800726 udf_free_blocks(inode->i_sb, inode,
727 laarr[curr].extLocation,
728 0, offset);
729 laarr[curr].extLength =
730 EXT_NOT_RECORDED_NOT_ALLOCATED |
731 (offset << blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 laarr[curr].extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800733 laarr[curr].extLocation.
734 partitionReferenceNum = 0;
735 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800737 (offset << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700738 curr++;
739 (*c)++;
740 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -0700742
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 laarr[curr].extLocation.logicalBlockNum = newblocknum;
744 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
745 laarr[curr].extLocation.partitionReferenceNum =
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800746 UDF_I(inode)->i_location.partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800748 blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700749 curr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700751 if (blen != offset + 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800753 laarr[curr].extLocation.logicalBlockNum +=
754 offset + 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700755 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800756 ((blen - (offset + 1)) << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700757 curr++;
758 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 }
760 }
761}
762
763static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700764 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
765 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766{
767 int start, length = 0, currlength = 0, i;
768
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700769 if (*endnum >= (c + 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 if (!lastblock)
771 return;
772 else
773 start = c;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700774 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800775 if ((laarr[c + 1].extLength >> 30) ==
776 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700777 start = c + 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800778 length = currlength =
779 (((laarr[c + 1].extLength &
780 UDF_EXTENT_LENGTH_MASK) +
781 inode->i_sb->s_blocksize - 1) >>
782 inode->i_sb->s_blocksize_bits);
783 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 start = c;
785 }
786
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700787 for (i = start + 1; i <= *endnum; i++) {
788 if (i == *endnum) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 if (lastblock)
790 length += UDF_DEFAULT_PREALLOC_BLOCKS;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800791 } else if ((laarr[i].extLength >> 30) ==
792 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
793 length += (((laarr[i].extLength &
794 UDF_EXTENT_LENGTH_MASK) +
795 inode->i_sb->s_blocksize - 1) >>
796 inode->i_sb->s_blocksize_bits);
797 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 break;
799 }
800
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700801 if (length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 int next = laarr[start].extLocation.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700803 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800804 inode->i_sb->s_blocksize - 1) >>
805 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800807 laarr[start].extLocation.partitionReferenceNum,
808 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
809 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
810 currlength);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700811 if (numalloc) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800812 if (start == (c + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 laarr[start].extLength +=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800814 (numalloc <<
815 inode->i_sb->s_blocksize_bits);
816 else {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700817 memmove(&laarr[c + 2], &laarr[c + 1],
818 sizeof(long_ad) * (*endnum - (c + 1)));
819 (*endnum)++;
820 laarr[c + 1].extLocation.logicalBlockNum = next;
821 laarr[c + 1].extLocation.partitionReferenceNum =
Marcin Slusarz4b111112008-02-08 04:20:36 -0800822 laarr[c].extLocation.
823 partitionReferenceNum;
824 laarr[c + 1].extLength =
825 EXT_NOT_RECORDED_ALLOCATED |
826 (numalloc <<
827 inode->i_sb->s_blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700828 start = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 }
830
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700831 for (i = start + 1; numalloc && i < *endnum; i++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800832 int elen = ((laarr[i].extLength &
833 UDF_EXTENT_LENGTH_MASK) +
834 inode->i_sb->s_blocksize - 1) >>
835 inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700837 if (elen > numalloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 laarr[i].extLength -=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800839 (numalloc <<
840 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 numalloc = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700842 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 numalloc -= elen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700844 if (*endnum > (i + 1))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800845 memmove(&laarr[i],
846 &laarr[i + 1],
847 sizeof(long_ad) *
848 (*endnum - (i + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700849 i--;
850 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 }
852 }
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800853 UDF_I(inode)->i_lenExtents +=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800854 numalloc << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 }
856 }
857}
858
859static void udf_merge_extents(struct inode *inode,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700860 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
861 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862{
863 int i;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800864 unsigned long blocksize = inode->i_sb->s_blocksize;
865 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700867 for (i = 0; i < (*endnum - 1); i++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800868 kernel_long_ad *li /*l[i]*/ = &laarr[i];
869 kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
Marcin Slusarz4b111112008-02-08 04:20:36 -0800871 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
872 (((li->extLength >> 30) ==
873 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
874 ((lip1->extLocation.logicalBlockNum -
875 li->extLocation.logicalBlockNum) ==
876 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
877 blocksize - 1) >> blocksize_bits)))) {
878
879 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
880 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
881 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
882 lip1->extLength = (lip1->extLength -
883 (li->extLength &
884 UDF_EXTENT_LENGTH_MASK) +
885 UDF_EXTENT_LENGTH_MASK) &
886 ~(blocksize - 1);
887 li->extLength = (li->extLength &
888 UDF_EXTENT_FLAG_MASK) +
889 (UDF_EXTENT_LENGTH_MASK + 1) -
890 blocksize;
891 lip1->extLocation.logicalBlockNum =
892 li->extLocation.logicalBlockNum +
893 ((li->extLength &
894 UDF_EXTENT_LENGTH_MASK) >>
895 blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700896 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800897 li->extLength = lip1->extLength +
898 (((li->extLength &
899 UDF_EXTENT_LENGTH_MASK) +
900 blocksize - 1) & ~(blocksize - 1));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700901 if (*endnum > (i + 2))
902 memmove(&laarr[i + 1], &laarr[i + 2],
Marcin Slusarz4b111112008-02-08 04:20:36 -0800903 sizeof(long_ad) *
904 (*endnum - (i + 2)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700905 i--;
906 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 }
Marcin Slusarz4b111112008-02-08 04:20:36 -0800908 } else if (((li->extLength >> 30) ==
909 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
910 ((lip1->extLength >> 30) ==
911 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
912 udf_free_blocks(inode->i_sb, inode, li->extLocation, 0,
913 ((li->extLength &
914 UDF_EXTENT_LENGTH_MASK) +
915 blocksize - 1) >> blocksize_bits);
916 li->extLocation.logicalBlockNum = 0;
917 li->extLocation.partitionReferenceNum = 0;
918
919 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
920 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
921 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
922 lip1->extLength = (lip1->extLength -
923 (li->extLength &
924 UDF_EXTENT_LENGTH_MASK) +
925 UDF_EXTENT_LENGTH_MASK) &
926 ~(blocksize - 1);
927 li->extLength = (li->extLength &
928 UDF_EXTENT_FLAG_MASK) +
929 (UDF_EXTENT_LENGTH_MASK + 1) -
930 blocksize;
931 } else {
932 li->extLength = lip1->extLength +
933 (((li->extLength &
934 UDF_EXTENT_LENGTH_MASK) +
935 blocksize - 1) & ~(blocksize - 1));
936 if (*endnum > (i + 2))
937 memmove(&laarr[i + 1], &laarr[i + 2],
938 sizeof(long_ad) *
939 (*endnum - (i + 2)));
940 i--;
941 (*endnum)--;
942 }
943 } else if ((li->extLength >> 30) ==
944 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
945 udf_free_blocks(inode->i_sb, inode,
946 li->extLocation, 0,
947 ((li->extLength &
948 UDF_EXTENT_LENGTH_MASK) +
949 blocksize - 1) >> blocksize_bits);
950 li->extLocation.logicalBlockNum = 0;
951 li->extLocation.partitionReferenceNum = 0;
952 li->extLength = (li->extLength &
953 UDF_EXTENT_LENGTH_MASK) |
954 EXT_NOT_RECORDED_NOT_ALLOCATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 }
956 }
957}
958
959static void udf_update_extents(struct inode *inode,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700960 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
961 int startnum, int endnum,
962 struct extent_position *epos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963{
964 int start = 0, i;
965 kernel_lb_addr tmploc;
966 uint32_t tmplen;
967
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700968 if (startnum > endnum) {
969 for (i = 0; i < (startnum - endnum); i++)
Jan Karaff116fc2007-05-08 00:35:14 -0700970 udf_delete_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700971 laarr[i].extLength);
972 } else if (startnum < endnum) {
973 for (i = 0; i < (endnum - startnum); i++) {
Jan Karaff116fc2007-05-08 00:35:14 -0700974 udf_insert_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700975 laarr[i].extLength);
Jan Karaff116fc2007-05-08 00:35:14 -0700976 udf_next_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700977 &laarr[i].extLength, 1);
978 start++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 }
980 }
981
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700982 for (i = start; i < endnum; i++) {
Jan Karaff116fc2007-05-08 00:35:14 -0700983 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
984 udf_write_aext(inode, epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700985 laarr[i].extLength, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 }
987}
988
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700989struct buffer_head *udf_bread(struct inode *inode, int block,
990 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700992 struct buffer_head *bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993
994 bh = udf_getblk(inode, block, create, err);
995 if (!bh)
996 return NULL;
997
998 if (buffer_uptodate(bh))
999 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001000
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 ll_rw_block(READ, 1, &bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001002
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 wait_on_buffer(bh);
1004 if (buffer_uptodate(bh))
1005 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001006
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 brelse(bh);
1008 *err = -EIO;
1009 return NULL;
1010}
1011
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001012void udf_truncate(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013{
1014 int offset;
1015 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001016 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017
1018 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001019 S_ISLNK(inode->i_mode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 return;
1021 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1022 return;
1023
1024 lock_kernel();
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001025 iinfo = UDF_I(inode);
1026 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001027 if (inode->i_sb->s_blocksize <
1028 (udf_file_entry_alloc_offset(inode) +
1029 inode->i_size)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 udf_expand_file_adinicb(inode, inode->i_size, &err);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001031 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1032 inode->i_size = iinfo->i_lenAlloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 unlock_kernel();
1034 return;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001035 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 udf_truncate_extents(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001037 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 offset = inode->i_size & (inode->i_sb->s_blocksize - 1);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001039 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset,
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001040 0x00, inode->i_sb->s_blocksize -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001041 offset - udf_file_entry_alloc_offset(inode));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001042 iinfo->i_lenAlloc = inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001044 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001045 block_truncate_page(inode->i_mapping, inode->i_size,
1046 udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 udf_truncate_extents(inode);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001048 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
1050 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1051 if (IS_SYNC(inode))
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001052 udf_sync_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 else
1054 mark_inode_dirty(inode);
1055 unlock_kernel();
1056}
1057
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001058static void __udf_read_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059{
1060 struct buffer_head *bh = NULL;
1061 struct fileEntry *fe;
1062 uint16_t ident;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001063 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
1065 /*
1066 * Set defaults, but the inode is still incomplete!
1067 * Note: get_new_inode() sets the following on a new inode:
1068 * i_sb = sb
1069 * i_no = ino
1070 * i_flags = sb->s_flags
1071 * i_state = 0
1072 * clean_inode(): zero fills and sets
1073 * i_count = 1
1074 * i_nlink = 1
1075 * i_op = NULL;
1076 */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001077 bh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 0, &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001078 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001080 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 make_bad_inode(inode);
1082 return;
1083 }
1084
1085 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001086 ident != TAG_IDENT_USE) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001087 printk(KERN_ERR "udf: udf_read_inode(ino %ld) "
1088 "failed ident=%d\n", inode->i_ino, ident);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001089 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 make_bad_inode(inode);
1091 return;
1092 }
1093
1094 fe = (struct fileEntry *)bh->b_data;
1095
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001096 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001097 struct buffer_head *ibh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001099 ibh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 1,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001100 &ident);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001101 if (ident == TAG_IDENT_IE && ibh) {
1102 struct buffer_head *nbh = NULL;
1103 kernel_lb_addr loc;
1104 struct indirectEntry *ie;
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001105
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001106 ie = (struct indirectEntry *)ibh->b_data;
1107 loc = lelb_to_cpu(ie->indirectICB.extLocation);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001108
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001109 if (ie->indirectICB.extLength &&
1110 (nbh = udf_read_ptagged(inode->i_sb, loc, 0,
1111 &ident))) {
1112 if (ident == TAG_IDENT_FE ||
1113 ident == TAG_IDENT_EFE) {
1114 memcpy(&iinfo->i_location,
1115 &loc,
1116 sizeof(kernel_lb_addr));
1117 brelse(bh);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001118 brelse(ibh);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001119 brelse(nbh);
1120 __udf_read_inode(inode);
1121 return;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001122 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001123 brelse(nbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001125 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001126 brelse(ibh);
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001127 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 printk(KERN_ERR "udf: unsupported strategy type: %d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001129 le16_to_cpu(fe->icbTag.strategyType));
Jan Kara3bf25cb2007-05-08 00:35:16 -07001130 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 make_bad_inode(inode);
1132 return;
1133 }
1134 udf_fill_inode(inode, bh);
Jan Kara31170b62007-05-08 00:35:21 -07001135
Jan Kara3bf25cb2007-05-08 00:35:16 -07001136 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137}
1138
1139static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1140{
1141 struct fileEntry *fe;
1142 struct extendedFileEntry *efe;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 int offset;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001144 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001145 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146
1147 fe = (struct fileEntry *)bh->b_data;
1148 efe = (struct extendedFileEntry *)bh->b_data;
1149
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001150 if (fe->icbTag.strategyType == cpu_to_le16(4))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001151 iinfo->i_strat4096 = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001152 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001153 iinfo->i_strat4096 = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001155 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
Marcin Slusarz4b111112008-02-08 04:20:36 -08001156 ICBTAG_FLAG_AD_MASK;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001157 iinfo->i_unique = 0;
1158 iinfo->i_lenEAttr = 0;
1159 iinfo->i_lenExtents = 0;
1160 iinfo->i_lenAlloc = 0;
1161 iinfo->i_next_alloc_block = 0;
1162 iinfo->i_next_alloc_goal = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001163 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001164 iinfo->i_efe = 1;
1165 iinfo->i_use = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001166 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1167 sizeof(struct extendedFileEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001168 make_bad_inode(inode);
1169 return;
1170 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001171 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001172 bh->b_data + sizeof(struct extendedFileEntry),
1173 inode->i_sb->s_blocksize -
1174 sizeof(struct extendedFileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001175 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001176 iinfo->i_efe = 0;
1177 iinfo->i_use = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001178 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1179 sizeof(struct fileEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001180 make_bad_inode(inode);
1181 return;
1182 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001183 memcpy(iinfo->i_ext.i_data,
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001184 bh->b_data + sizeof(struct fileEntry),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001185 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001186 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001187 iinfo->i_efe = 0;
1188 iinfo->i_use = 1;
1189 iinfo->i_lenAlloc = le32_to_cpu(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001190 ((struct unallocSpaceEntry *)bh->b_data)->
1191 lengthAllocDescs);
1192 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1193 sizeof(struct unallocSpaceEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001194 make_bad_inode(inode);
1195 return;
1196 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001197 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001198 bh->b_data + sizeof(struct unallocSpaceEntry),
1199 inode->i_sb->s_blocksize -
1200 sizeof(struct unallocSpaceEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 return;
1202 }
1203
1204 inode->i_uid = le32_to_cpu(fe->uid);
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001205 if (inode->i_uid == -1 ||
1206 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1207 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001208 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
1210 inode->i_gid = le32_to_cpu(fe->gid);
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001211 if (inode->i_gid == -1 ||
1212 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1213 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001214 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
1216 inode->i_nlink = le16_to_cpu(fe->fileLinkCount);
1217 if (!inode->i_nlink)
1218 inode->i_nlink = 1;
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001219
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 inode->i_size = le64_to_cpu(fe->informationLength);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001221 iinfo->i_lenExtents = inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222
1223 inode->i_mode = udf_convert_permissions(fe);
1224 inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask;
1225
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001226 if (iinfo->i_efe == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001228 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
Marcin Slusarz56774802008-02-10 11:25:31 +01001230 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001231 inode->i_atime = sbi->s_record_time;
1232
Marcin Slusarz56774802008-02-10 11:25:31 +01001233 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1234 fe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001235 inode->i_mtime = sbi->s_record_time;
1236
Marcin Slusarz56774802008-02-10 11:25:31 +01001237 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001238 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001240 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1241 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1242 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1243 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001244 } else {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001245 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001246 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
Marcin Slusarz56774802008-02-10 11:25:31 +01001248 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001249 inode->i_atime = sbi->s_record_time;
1250
Marcin Slusarz56774802008-02-10 11:25:31 +01001251 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1252 efe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001253 inode->i_mtime = sbi->s_record_time;
1254
Marcin Slusarz56774802008-02-10 11:25:31 +01001255 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001256 iinfo->i_crtime = sbi->s_record_time;
1257
Marcin Slusarz56774802008-02-10 11:25:31 +01001258 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001259 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001261 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1262 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1263 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001264 offset = sizeof(struct extendedFileEntry) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001265 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 }
1267
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001268 switch (fe->icbTag.fileType) {
1269 case ICBTAG_FILE_TYPE_DIRECTORY:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001270 inode->i_op = &udf_dir_inode_operations;
1271 inode->i_fop = &udf_dir_operations;
1272 inode->i_mode |= S_IFDIR;
1273 inc_nlink(inode);
1274 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001275 case ICBTAG_FILE_TYPE_REALTIME:
1276 case ICBTAG_FILE_TYPE_REGULAR:
1277 case ICBTAG_FILE_TYPE_UNDEF:
Jan Kara742e1792008-04-08 01:17:52 +02001278 case ICBTAG_FILE_TYPE_VAT20:
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001279 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001280 inode->i_data.a_ops = &udf_adinicb_aops;
1281 else
1282 inode->i_data.a_ops = &udf_aops;
1283 inode->i_op = &udf_file_inode_operations;
1284 inode->i_fop = &udf_file_operations;
1285 inode->i_mode |= S_IFREG;
1286 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001287 case ICBTAG_FILE_TYPE_BLOCK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001288 inode->i_mode |= S_IFBLK;
1289 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001290 case ICBTAG_FILE_TYPE_CHAR:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001291 inode->i_mode |= S_IFCHR;
1292 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001293 case ICBTAG_FILE_TYPE_FIFO:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001294 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1295 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001296 case ICBTAG_FILE_TYPE_SOCKET:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001297 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1298 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001299 case ICBTAG_FILE_TYPE_SYMLINK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001300 inode->i_data.a_ops = &udf_symlink_aops;
1301 inode->i_op = &page_symlink_inode_operations;
1302 inode->i_mode = S_IFLNK | S_IRWXUGO;
1303 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001304 default:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001305 printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown "
1306 "file type=%d\n", inode->i_ino,
1307 fe->icbTag.fileType);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001308 make_bad_inode(inode);
1309 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001311 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001312 struct deviceSpec *dsea =
1313 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001314 if (dsea) {
1315 init_special_inode(inode, inode->i_mode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001316 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1317 le32_to_cpu(dsea->minorDeviceIdent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 /* Developer ID ??? */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001319 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 make_bad_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 }
1322}
1323
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001324static int udf_alloc_i_data(struct inode *inode, size_t size)
1325{
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001326 struct udf_inode_info *iinfo = UDF_I(inode);
1327 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001328
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001329 if (!iinfo->i_ext.i_data) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001330 printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) "
1331 "no free memory\n", inode->i_ino);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001332 return -ENOMEM;
1333 }
1334
1335 return 0;
1336}
1337
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001338static mode_t udf_convert_permissions(struct fileEntry *fe)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339{
1340 mode_t mode;
1341 uint32_t permissions;
1342 uint32_t flags;
1343
1344 permissions = le32_to_cpu(fe->permissions);
1345 flags = le16_to_cpu(fe->icbTag.flags);
1346
Marcin Slusarz4b111112008-02-08 04:20:36 -08001347 mode = ((permissions) & S_IRWXO) |
1348 ((permissions >> 2) & S_IRWXG) |
1349 ((permissions >> 4) & S_IRWXU) |
1350 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1351 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1352 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353
1354 return mode;
1355}
1356
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001357int udf_write_inode(struct inode *inode, int sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358{
1359 int ret;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001360
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 lock_kernel();
1362 ret = udf_update_inode(inode, sync);
1363 unlock_kernel();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 return ret;
1366}
1367
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001368int udf_sync_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369{
1370 return udf_update_inode(inode, 1);
1371}
1372
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001373static int udf_update_inode(struct inode *inode, int do_sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374{
1375 struct buffer_head *bh = NULL;
1376 struct fileEntry *fe;
1377 struct extendedFileEntry *efe;
1378 uint32_t udfperms;
1379 uint16_t icbflags;
1380 uint16_t crclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 int err = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001382 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001383 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001384 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385
Marcin Slusarz4b111112008-02-08 04:20:36 -08001386 bh = udf_tread(inode->i_sb,
1387 udf_get_lb_pblock(inode->i_sb,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001388 iinfo->i_location, 0));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001389 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 udf_debug("bread failure\n");
1391 return -EIO;
1392 }
1393
1394 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
1395
1396 fe = (struct fileEntry *)bh->b_data;
1397 efe = (struct extendedFileEntry *)bh->b_data;
1398
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001399 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 struct unallocSpaceEntry *use =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001401 (struct unallocSpaceEntry *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001403 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001404 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001405 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001406 sizeof(struct unallocSpaceEntry));
1407 crclen = sizeof(struct unallocSpaceEntry) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001408 iinfo->i_lenAlloc - sizeof(tag);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001409 use->descTag.tagLocation = cpu_to_le32(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001410 iinfo->i_location.
Marcin Slusarz4b111112008-02-08 04:20:36 -08001411 logicalBlockNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 use->descTag.descCRCLength = cpu_to_le16(crclen);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001413 use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use +
1414 sizeof(tag), crclen,
1415 0));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001416 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417
1418 mark_buffer_dirty(bh);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001419 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 return err;
1421 }
1422
Phillip Susi4d6660e2006-03-07 21:55:24 -08001423 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1424 fe->uid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001425 else
1426 fe->uid = cpu_to_le32(inode->i_uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
Phillip Susi4d6660e2006-03-07 21:55:24 -08001428 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1429 fe->gid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001430 else
1431 fe->gid = cpu_to_le32(inode->i_gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432
Marcin Slusarz4b111112008-02-08 04:20:36 -08001433 udfperms = ((inode->i_mode & S_IRWXO)) |
1434 ((inode->i_mode & S_IRWXG) << 2) |
1435 ((inode->i_mode & S_IRWXU) << 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436
Marcin Slusarz4b111112008-02-08 04:20:36 -08001437 udfperms |= (le32_to_cpu(fe->permissions) &
1438 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1439 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1440 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441 fe->permissions = cpu_to_le32(udfperms);
1442
1443 if (S_ISDIR(inode->i_mode))
1444 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1445 else
1446 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1447
1448 fe->informationLength = cpu_to_le64(inode->i_size);
1449
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001450 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 regid *eid;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001452 struct deviceSpec *dsea =
1453 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001454 if (!dsea) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455 dsea = (struct deviceSpec *)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001456 udf_add_extendedattr(inode,
1457 sizeof(struct deviceSpec) +
1458 sizeof(regid), 12, 0x3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 dsea->attrType = cpu_to_le32(12);
1460 dsea->attrSubtype = 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001461 dsea->attrLength = cpu_to_le32(
1462 sizeof(struct deviceSpec) +
1463 sizeof(regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 dsea->impUseLength = cpu_to_le32(sizeof(regid));
1465 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001466 eid = (regid *)dsea->impUse;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 memset(eid, 0, sizeof(regid));
1468 strcpy(eid->ident, UDF_ID_DEVELOPER);
1469 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1470 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1471 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1472 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1473 }
1474
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001475 if (iinfo->i_efe == 0) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001476 memcpy(bh->b_data + sizeof(struct fileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001477 iinfo->i_ext.i_data,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001478 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001479 fe->logicalBlocksRecorded = cpu_to_le64(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001480 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1481 (blocksize_bits - 9));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482
Marcin Slusarz56774802008-02-10 11:25:31 +01001483 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1484 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1485 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 memset(&(fe->impIdent), 0, sizeof(regid));
1487 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1488 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1489 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001490 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1491 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1492 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1494 crclen = sizeof(struct fileEntry);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001495 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001496 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001497 iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001498 inode->i_sb->s_blocksize -
1499 sizeof(struct extendedFileEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 efe->objectSize = cpu_to_le64(inode->i_size);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001501 efe->logicalBlocksRecorded = cpu_to_le64(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001502 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1503 (blocksize_bits - 9));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001505 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1506 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1507 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1508 iinfo->i_crtime = inode->i_atime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001509
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001510 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1511 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1512 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1513 iinfo->i_crtime = inode->i_mtime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001514
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001515 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1516 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1517 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1518 iinfo->i_crtime = inode->i_ctime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519
Marcin Slusarz56774802008-02-10 11:25:31 +01001520 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1521 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1522 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1523 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524
1525 memset(&(efe->impIdent), 0, sizeof(regid));
1526 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1527 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1528 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001529 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1530 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1531 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1533 crclen = sizeof(struct extendedFileEntry);
1534 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001535 if (iinfo->i_strat4096) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536 fe->icbTag.strategyType = cpu_to_le16(4096);
1537 fe->icbTag.strategyParameter = cpu_to_le16(1);
1538 fe->icbTag.numEntries = cpu_to_le16(2);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001539 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 fe->icbTag.strategyType = cpu_to_le16(4);
1541 fe->icbTag.numEntries = cpu_to_le16(1);
1542 }
1543
1544 if (S_ISDIR(inode->i_mode))
1545 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1546 else if (S_ISREG(inode->i_mode))
1547 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1548 else if (S_ISLNK(inode->i_mode))
1549 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1550 else if (S_ISBLK(inode->i_mode))
1551 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1552 else if (S_ISCHR(inode->i_mode))
1553 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1554 else if (S_ISFIFO(inode->i_mode))
1555 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1556 else if (S_ISSOCK(inode->i_mode))
1557 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1558
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001559 icbflags = iinfo->i_alloc_type |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001560 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1561 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1562 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1563 (le16_to_cpu(fe->icbTag.flags) &
1564 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1565 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566
1567 fe->icbTag.flags = cpu_to_le16(icbflags);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001568 if (sbi->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569 fe->descTag.descVersion = cpu_to_le16(3);
1570 else
1571 fe->descTag.descVersion = cpu_to_le16(2);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001572 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001573 fe->descTag.tagLocation = cpu_to_le32(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001574 iinfo->i_location.logicalBlockNum);
1575 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc -
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001576 sizeof(tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 fe->descTag.descCRCLength = cpu_to_le16(crclen);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001578 fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag),
1579 crclen, 0));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001580 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581
1582 /* write the data blocks */
1583 mark_buffer_dirty(bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001584 if (do_sync) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585 sync_dirty_buffer(bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001586 if (buffer_req(bh) && !buffer_uptodate(bh)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001587 printk(KERN_WARNING "IO error syncing udf inode "
1588 "[%s:%08lx]\n", inode->i_sb->s_id,
1589 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 err = -EIO;
1591 }
1592 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001593 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001594
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 return err;
1596}
1597
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001598struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599{
1600 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1601 struct inode *inode = iget_locked(sb, block);
1602
1603 if (!inode)
1604 return NULL;
1605
1606 if (inode->i_state & I_NEW) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001607 memcpy(&UDF_I(inode)->i_location, &ino, sizeof(kernel_lb_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 __udf_read_inode(inode);
1609 unlock_new_inode(inode);
1610 }
1611
1612 if (is_bad_inode(inode))
1613 goto out_iput;
1614
Marcin Slusarz4b111112008-02-08 04:20:36 -08001615 if (ino.logicalBlockNum >= UDF_SB(sb)->
1616 s_partmaps[ino.partitionReferenceNum].s_partition_len) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617 udf_debug("block=%d, partition=%d out of range\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001618 ino.logicalBlockNum, ino.partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 make_bad_inode(inode);
1620 goto out_iput;
1621 }
1622
1623 return inode;
1624
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001625 out_iput:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 iput(inode);
1627 return NULL;
1628}
1629
Marcin Slusarz4b111112008-02-08 04:20:36 -08001630int8_t udf_add_aext(struct inode *inode, struct extent_position *epos,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001631 kernel_lb_addr eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632{
1633 int adsize;
1634 short_ad *sad = NULL;
1635 long_ad *lad = NULL;
1636 struct allocExtDesc *aed;
1637 int8_t etype;
1638 uint8_t *ptr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001639 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640
Jan Karaff116fc2007-05-08 00:35:14 -07001641 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001642 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001643 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001644 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 else
Jan Karaff116fc2007-05-08 00:35:14 -07001646 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001648 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 adsize = sizeof(short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001650 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651 adsize = sizeof(long_ad);
1652 else
1653 return -1;
1654
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001655 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 char *sptr, *dptr;
1657 struct buffer_head *nbh;
1658 int err, loffset;
Jan Karaff116fc2007-05-08 00:35:14 -07001659 kernel_lb_addr obloc = epos->block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Marcin Slusarz4b111112008-02-08 04:20:36 -08001661 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1662 obloc.partitionReferenceNum,
1663 obloc.logicalBlockNum, &err);
1664 if (!epos->block.logicalBlockNum)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 return -1;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001666 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1667 epos->block,
1668 0));
1669 if (!nbh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671 lock_buffer(nbh);
1672 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1673 set_buffer_uptodate(nbh);
1674 unlock_buffer(nbh);
1675 mark_buffer_dirty_inode(nbh, inode);
1676
1677 aed = (struct allocExtDesc *)(nbh->b_data);
1678 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
Marcin Slusarz4b111112008-02-08 04:20:36 -08001679 aed->previousAllocExtLocation =
1680 cpu_to_le32(obloc.logicalBlockNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001681 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
Jan Karaff116fc2007-05-08 00:35:14 -07001682 loffset = epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 aed->lengthAllocDescs = cpu_to_le32(adsize);
1684 sptr = ptr - adsize;
1685 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1686 memcpy(dptr, sptr, adsize);
Jan Karaff116fc2007-05-08 00:35:14 -07001687 epos->offset = sizeof(struct allocExtDesc) + adsize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001688 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001689 loffset = epos->offset + adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690 aed->lengthAllocDescs = cpu_to_le32(0);
1691 sptr = ptr;
Jan Karaff116fc2007-05-08 00:35:14 -07001692 epos->offset = sizeof(struct allocExtDesc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001694 if (epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001695 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001696 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001697 } else {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001698 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 mark_inode_dirty(inode);
1700 }
1701 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001702 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001704 epos->block.logicalBlockNum, sizeof(tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705 else
1706 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001707 epos->block.logicalBlockNum, sizeof(tag));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001708 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001709 case ICBTAG_FLAG_AD_SHORT:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001710 sad = (short_ad *)sptr;
1711 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1712 inode->i_sb->s_blocksize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001713 sad->extPosition =
1714 cpu_to_le32(epos->block.logicalBlockNum);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001715 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001716 case ICBTAG_FLAG_AD_LONG:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001717 lad = (long_ad *)sptr;
1718 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1719 inode->i_sb->s_blocksize);
1720 lad->extLocation = cpu_to_lelb(epos->block);
1721 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1722 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001724 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001725 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001726 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Jan Karaff116fc2007-05-08 00:35:14 -07001727 udf_update_tag(epos->bh->b_data, loffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001729 udf_update_tag(epos->bh->b_data,
1730 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001731 mark_buffer_dirty_inode(epos->bh, inode);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001732 brelse(epos->bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001733 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001735 }
Jan Karaff116fc2007-05-08 00:35:14 -07001736 epos->bh = nbh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 }
1738
Jan Karaff116fc2007-05-08 00:35:14 -07001739 etype = udf_write_aext(inode, epos, eloc, elen, inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001741 if (!epos->bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001742 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001744 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001745 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001746 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001747 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1748 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1749 udf_update_tag(epos->bh->b_data,
1750 epos->offset + (inc ? 0 : adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001752 udf_update_tag(epos->bh->b_data,
1753 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001754 mark_buffer_dirty_inode(epos->bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 }
1756
1757 return etype;
1758}
1759
Marcin Slusarz4b111112008-02-08 04:20:36 -08001760int8_t udf_write_aext(struct inode *inode, struct extent_position *epos,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001761 kernel_lb_addr eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762{
1763 int adsize;
1764 uint8_t *ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001765 short_ad *sad;
1766 long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001767 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768
Jan Karaff116fc2007-05-08 00:35:14 -07001769 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001770 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001771 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001772 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 else
Jan Karaff116fc2007-05-08 00:35:14 -07001774 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001776 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001777 case ICBTAG_FLAG_AD_SHORT:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001778 sad = (short_ad *)ptr;
1779 sad->extLength = cpu_to_le32(elen);
1780 sad->extPosition = cpu_to_le32(eloc.logicalBlockNum);
1781 adsize = sizeof(short_ad);
1782 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001783 case ICBTAG_FLAG_AD_LONG:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001784 lad = (long_ad *)ptr;
1785 lad->extLength = cpu_to_le32(elen);
1786 lad->extLocation = cpu_to_lelb(eloc);
1787 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1788 adsize = sizeof(long_ad);
1789 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001790 default:
1791 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792 }
1793
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001794 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001795 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001796 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001797 struct allocExtDesc *aed =
1798 (struct allocExtDesc *)epos->bh->b_data;
Jan Karaff116fc2007-05-08 00:35:14 -07001799 udf_update_tag(epos->bh->b_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001800 le32_to_cpu(aed->lengthAllocDescs) +
1801 sizeof(struct allocExtDesc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802 }
Jan Karaff116fc2007-05-08 00:35:14 -07001803 mark_buffer_dirty_inode(epos->bh, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001804 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001806 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807
1808 if (inc)
Jan Karaff116fc2007-05-08 00:35:14 -07001809 epos->offset += adsize;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001810
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 return (elen >> 30);
1812}
1813
Marcin Slusarz4b111112008-02-08 04:20:36 -08001814int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1815 kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816{
1817 int8_t etype;
1818
Jan Karaff116fc2007-05-08 00:35:14 -07001819 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001820 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001821 int block;
Jan Karaff116fc2007-05-08 00:35:14 -07001822 epos->block = *eloc;
1823 epos->offset = sizeof(struct allocExtDesc);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001824 brelse(epos->bh);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001825 block = udf_get_lb_pblock(inode->i_sb, epos->block, 0);
1826 epos->bh = udf_tread(inode->i_sb, block);
1827 if (!epos->bh) {
1828 udf_debug("reading block %d failed!\n", block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 return -1;
1830 }
1831 }
1832
1833 return etype;
1834}
1835
Marcin Slusarz4b111112008-02-08 04:20:36 -08001836int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
1837 kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838{
1839 int alen;
1840 int8_t etype;
1841 uint8_t *ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001842 short_ad *sad;
1843 long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001844 struct udf_inode_info *iinfo = UDF_I(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001845
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001846 if (!epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001847 if (!epos->offset)
1848 epos->offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001849 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001850 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001851 iinfo->i_lenEAttr;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001852 alen = udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001853 iinfo->i_lenAlloc;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001854 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001855 if (!epos->offset)
1856 epos->offset = sizeof(struct allocExtDesc);
1857 ptr = epos->bh->b_data + epos->offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001858 alen = sizeof(struct allocExtDesc) +
Marcin Slusarz4b111112008-02-08 04:20:36 -08001859 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
1860 lengthAllocDescs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861 }
1862
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001863 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001864 case ICBTAG_FLAG_AD_SHORT:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001865 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
1866 if (!sad)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867 return -1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001868 etype = le32_to_cpu(sad->extLength) >> 30;
1869 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001870 eloc->partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001871 iinfo->i_location.partitionReferenceNum;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001872 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
1873 break;
1874 case ICBTAG_FLAG_AD_LONG:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001875 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
1876 if (!lad)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001877 return -1;
1878 etype = le32_to_cpu(lad->extLength) >> 30;
1879 *eloc = lelb_to_cpu(lad->extLocation);
1880 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
1881 break;
1882 default:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001883 udf_debug("alloc_type = %d unsupported\n",
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001884 iinfo->i_alloc_type);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001885 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 }
1887
1888 return etype;
1889}
1890
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001891static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
1892 kernel_lb_addr neloc, uint32_t nelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893{
1894 kernel_lb_addr oeloc;
1895 uint32_t oelen;
1896 int8_t etype;
1897
Jan Karaff116fc2007-05-08 00:35:14 -07001898 if (epos.bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001899 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001901 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
Jan Karaff116fc2007-05-08 00:35:14 -07001902 udf_write_aext(inode, &epos, neloc, nelen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 neloc = oeloc;
1904 nelen = (etype << 30) | oelen;
1905 }
Jan Karaff116fc2007-05-08 00:35:14 -07001906 udf_add_aext(inode, &epos, neloc, nelen, 1);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001907 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001908
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 return (nelen >> 30);
1910}
1911
Marcin Slusarz4b111112008-02-08 04:20:36 -08001912int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001913 kernel_lb_addr eloc, uint32_t elen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914{
Jan Karaff116fc2007-05-08 00:35:14 -07001915 struct extent_position oepos;
1916 int adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 int8_t etype;
1918 struct allocExtDesc *aed;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001919 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001921 if (epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07001922 get_bh(epos.bh);
1923 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 }
1925
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001926 iinfo = UDF_I(inode);
1927 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928 adsize = sizeof(short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001929 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930 adsize = sizeof(long_ad);
1931 else
1932 adsize = 0;
1933
Jan Karaff116fc2007-05-08 00:35:14 -07001934 oepos = epos;
1935 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 return -1;
1937
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001938 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
Jan Karaff116fc2007-05-08 00:35:14 -07001939 udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001940 if (oepos.bh != epos.bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001941 oepos.block = epos.block;
Jan Kara3bf25cb2007-05-08 00:35:16 -07001942 brelse(oepos.bh);
1943 get_bh(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -07001944 oepos.bh = epos.bh;
1945 oepos.offset = epos.offset - adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 }
1947 }
1948 memset(&eloc, 0x00, sizeof(kernel_lb_addr));
1949 elen = 0;
1950
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001951 if (epos.bh != oepos.bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001952 udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1);
1953 udf_write_aext(inode, &oepos, eloc, elen, 1);
1954 udf_write_aext(inode, &oepos, eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001955 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001956 iinfo->i_lenAlloc -= (adsize * 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001958 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001959 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001960 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001961 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001962 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08001963 udf_update_tag(oepos.bh->b_data,
1964 oepos.offset - (2 * adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001966 udf_update_tag(oepos.bh->b_data,
1967 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001968 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001970 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001971 udf_write_aext(inode, &oepos, eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001972 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001973 iinfo->i_lenAlloc -= adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001975 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001976 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001977 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001978 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001979 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08001980 udf_update_tag(oepos.bh->b_data,
1981 epos.offset - adsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001983 udf_update_tag(oepos.bh->b_data,
1984 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001985 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986 }
1987 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001988
Jan Kara3bf25cb2007-05-08 00:35:16 -07001989 brelse(epos.bh);
1990 brelse(oepos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001991
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 return (elen >> 30);
1993}
1994
Marcin Slusarz4b111112008-02-08 04:20:36 -08001995int8_t inode_bmap(struct inode *inode, sector_t block,
1996 struct extent_position *pos, kernel_lb_addr *eloc,
1997 uint32_t *elen, sector_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998{
Marcin Slusarz4b111112008-02-08 04:20:36 -08001999 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002000 loff_t lbcount = 0, bcount =
Marcin Slusarz4b111112008-02-08 04:20:36 -08002001 (loff_t) block << blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002003 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002004
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002005 iinfo = UDF_I(inode);
Jan Karaff116fc2007-05-08 00:35:14 -07002006 pos->offset = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002007 pos->block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002008 pos->bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009 *elen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002010
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002011 do {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002012 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2013 if (etype == -1) {
2014 *offset = (bcount - lbcount) >> blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002015 iinfo->i_lenExtents = lbcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016 return -1;
2017 }
2018 lbcount += *elen;
2019 } while (lbcount <= bcount);
2020
Marcin Slusarz4b111112008-02-08 04:20:36 -08002021 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022
2023 return etype;
2024}
2025
Jan Kara60448b12007-05-08 00:35:13 -07002026long udf_block_map(struct inode *inode, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027{
Jan Karaff116fc2007-05-08 00:35:14 -07002028 kernel_lb_addr eloc;
2029 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -07002030 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002031 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 int ret;
2033
2034 lock_kernel();
2035
Marcin Slusarz4b111112008-02-08 04:20:36 -08002036 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2037 (EXT_RECORDED_ALLOCATED >> 30))
Jan Kara60448b12007-05-08 00:35:13 -07002038 ret = udf_get_lb_pblock(inode->i_sb, eloc, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039 else
2040 ret = 0;
2041
2042 unlock_kernel();
Jan Kara3bf25cb2007-05-08 00:35:16 -07002043 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044
2045 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2046 return udf_fixed_to_variable(ret);
2047 else
2048 return ret;
2049}