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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/module.h>
35#include <linux/pagemap.h>
36#include <linux/buffer_head.h>
37#include <linux/writeback.h>
38#include <linux/slab.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020039#include <linux/crc-itu-t.h>
Namjae Jeonbc112322011-10-03 14:02:59 +090040#include <linux/mpage.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42#include "udf_i.h"
43#include "udf_sb.h"
44
45MODULE_AUTHOR("Ben Fennema");
46MODULE_DESCRIPTION("Universal Disk Format Filesystem");
47MODULE_LICENSE("GPL");
48
49#define EXTENT_MERGE_SIZE 5
50
Al Virofaa17292011-07-26 03:18:29 -040051static umode_t udf_convert_permissions(struct fileEntry *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052static int udf_update_inode(struct inode *, int);
53static void udf_fill_inode(struct inode *, struct buffer_head *);
Jan Kara49521de2010-10-20 17:42:44 +020054static int udf_sync_inode(struct inode *inode);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -070055static int udf_alloc_i_data(struct inode *inode, size_t size);
Jan Kara7b0b0932011-12-10 01:43:33 +010056static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
Jan Karaff116fc2007-05-08 00:35:14 -070057static int8_t udf_insert_aext(struct inode *, struct extent_position,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020058 struct kernel_lb_addr, uint32_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059static void udf_split_extents(struct inode *, int *, int, int,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020060 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061static void udf_prealloc_extents(struct inode *, int, int,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020062 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static void udf_merge_extents(struct inode *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020064 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static void udf_update_extents(struct inode *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020066 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070067 struct extent_position *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
69
Christoph Hellwigb1e32122008-02-22 12:38:48 +010070
Al Viro3aac2b62010-06-07 00:43:39 -040071void udf_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Jan Kara2c948b32009-12-03 13:39:28 +010073 struct udf_inode_info *iinfo = UDF_I(inode);
Al Viro3aac2b62010-06-07 00:43:39 -040074 int want_delete = 0;
Jan Kara2c948b32009-12-03 13:39:28 +010075
Al Viro3aac2b62010-06-07 00:43:39 -040076 if (!inode->i_nlink && !is_bad_inode(inode)) {
77 want_delete = 1;
Jan Kara7e49b6f2010-10-22 00:30:26 +020078 udf_setsize(inode, 0);
Al Viro3aac2b62010-06-07 00:43:39 -040079 udf_update_inode(inode, IS_SYNC(inode));
Jan Kara7e49b6f2010-10-22 00:30:26 +020080 } else
81 truncate_inode_pages(&inode->i_data, 0);
Al Viro3aac2b62010-06-07 00:43:39 -040082 invalidate_inode_buffers(inode);
Jan Karadbd57682012-05-03 14:48:02 +020083 clear_inode(inode);
Jan Kara2c948b32009-12-03 13:39:28 +010084 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
85 inode->i_size != iinfo->i_lenExtents) {
Joe Perches78ace702011-10-10 01:08:05 -070086 udf_warn(inode->i_sb, "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n",
87 inode->i_ino, inode->i_mode,
88 (unsigned long long)inode->i_size,
89 (unsigned long long)iinfo->i_lenExtents);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -080091 kfree(iinfo->i_ext.i_data);
92 iinfo->i_ext.i_data = NULL;
Al Viro3aac2b62010-06-07 00:43:39 -040093 if (want_delete) {
Al Viro3aac2b62010-06-07 00:43:39 -040094 udf_free_inode(inode);
Al Viro3aac2b62010-06-07 00:43:39 -040095 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
98static int udf_writepage(struct page *page, struct writeback_control *wbc)
99{
100 return block_write_full_page(page, udf_get_block, wbc);
101}
102
103static int udf_readpage(struct file *file, struct page *page)
104{
Namjae Jeonbc112322011-10-03 14:02:59 +0900105 return mpage_readpage(page, udf_get_block);
106}
107
108static int udf_readpages(struct file *file, struct address_space *mapping,
109 struct list_head *pages, unsigned nr_pages)
110{
111 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112}
113
Nick Pigginbe021ee2007-10-16 01:25:20 -0700114static int udf_write_begin(struct file *file, struct address_space *mapping,
115 loff_t pos, unsigned len, unsigned flags,
116 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117{
Christoph Hellwig155130a2010-06-04 11:29:58 +0200118 int ret;
119
120 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
121 if (unlikely(ret)) {
Jan Kara7e49b6f2010-10-22 00:30:26 +0200122 struct inode *inode = mapping->host;
123 struct udf_inode_info *iinfo = UDF_I(inode);
124 loff_t isize = inode->i_size;
125
126 if (pos + len > isize) {
127 truncate_pagecache(inode, pos + len, isize);
128 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
129 down_write(&iinfo->i_data_sem);
130 udf_truncate_extents(inode);
131 up_write(&iinfo->i_data_sem);
132 }
133 }
Christoph Hellwig155130a2010-06-04 11:29:58 +0200134 }
135
136 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137}
138
139static sector_t udf_bmap(struct address_space *mapping, sector_t block)
140{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700141 return generic_block_bmap(mapping, block, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142}
143
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700144const struct address_space_operations udf_aops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700145 .readpage = udf_readpage,
Namjae Jeonbc112322011-10-03 14:02:59 +0900146 .readpages = udf_readpages,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700147 .writepage = udf_writepage,
Nick Pigginbe021ee2007-10-16 01:25:20 -0700148 .write_begin = udf_write_begin,
149 .write_end = generic_write_end,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700150 .bmap = udf_bmap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151};
152
Jan Karad2eb8c32011-12-10 02:30:48 +0100153/*
154 * Expand file stored in ICB to a normal one-block-file
155 *
156 * This function requires i_data_sem for writing and releases it.
157 * This function requires i_mutex held
158 */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200159int udf_expand_file_adinicb(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160{
161 struct page *page;
162 char *kaddr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800163 struct udf_inode_info *iinfo = UDF_I(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200164 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 struct writeback_control udf_wbc = {
166 .sync_mode = WB_SYNC_NONE,
167 .nr_to_write = 1,
168 };
169
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800170 if (!iinfo->i_lenAlloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800172 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800174 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200175 /* from now on we have normal address_space methods */
176 inode->i_data.a_ops = &udf_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100177 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200179 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 }
Jan Karad2eb8c32011-12-10 02:30:48 +0100181 /*
182 * Release i_data_sem so that we can lock a page - page lock ranks
183 * above i_data_sem. i_mutex still protects us against file changes.
184 */
185 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Jan Kara7e49b6f2010-10-22 00:30:26 +0200187 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
188 if (!page)
189 return -ENOMEM;
Matt Mackallcd7619d2005-05-01 08:59:01 -0700190
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700191 if (!PageUptodate(page)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 kaddr = kmap(page);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800193 memset(kaddr + iinfo->i_lenAlloc, 0x00,
194 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
195 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
196 iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 flush_dcache_page(page);
198 SetPageUptodate(page);
199 kunmap(page);
200 }
Jan Karad2eb8c32011-12-10 02:30:48 +0100201 down_write(&iinfo->i_data_sem);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800202 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
203 iinfo->i_lenAlloc);
204 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800206 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800208 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200209 /* from now on we have normal address_space methods */
210 inode->i_data.a_ops = &udf_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100211 up_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200212 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
213 if (err) {
214 /* Restore everything back so that we don't lose data... */
215 lock_page(page);
216 kaddr = kmap(page);
Jan Karad2eb8c32011-12-10 02:30:48 +0100217 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200218 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
219 inode->i_size);
220 kunmap(page);
221 unlock_page(page);
222 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
223 inode->i_data.a_ops = &udf_adinicb_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100224 up_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200225 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 page_cache_release(page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200228
229 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700232struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
233 int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234{
235 int newblock;
Jan Karaff116fc2007-05-08 00:35:14 -0700236 struct buffer_head *dbh = NULL;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200237 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 uint8_t alloctype;
Jan Karaff116fc2007-05-08 00:35:14 -0700239 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241 struct udf_fileident_bh sfibh, dfibh;
Jan Karaaf793292008-02-08 04:20:50 -0800242 loff_t f_pos = udf_ext0_offset(inode);
243 int size = udf_ext0_offset(inode) + inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 struct fileIdentDesc cfi, *sfi, *dfi;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800245 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
248 alloctype = ICBTAG_FLAG_AD_SHORT;
249 else
250 alloctype = ICBTAG_FLAG_AD_LONG;
251
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700252 if (!inode->i_size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800253 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 mark_inode_dirty(inode);
255 return NULL;
256 }
257
258 /* alloc block, and copy data to it */
259 *block = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800260 iinfo->i_location.partitionReferenceNum,
261 iinfo->i_location.logicalBlockNum, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 if (!(*block))
263 return NULL;
264 newblock = udf_get_pblock(inode->i_sb, *block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800265 iinfo->i_location.partitionReferenceNum,
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800266 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 if (!newblock)
268 return NULL;
269 dbh = udf_tgetblk(inode->i_sb, newblock);
270 if (!dbh)
271 return NULL;
272 lock_buffer(dbh);
273 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
274 set_buffer_uptodate(dbh);
275 unlock_buffer(dbh);
276 mark_buffer_dirty_inode(dbh, inode);
277
Marcin Slusarz4b111112008-02-08 04:20:36 -0800278 sfibh.soffset = sfibh.eoffset =
Jan Karaaf793292008-02-08 04:20:50 -0800279 f_pos & (inode->i_sb->s_blocksize - 1);
Jan Karaff116fc2007-05-08 00:35:14 -0700280 sfibh.sbh = sfibh.ebh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 dfibh.soffset = dfibh.eoffset = 0;
282 dfibh.sbh = dfibh.ebh = dbh;
Jan Karaaf793292008-02-08 04:20:50 -0800283 while (f_pos < size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800284 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800285 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
286 NULL, NULL, NULL);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700287 if (!sfi) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700288 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 return NULL;
290 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800291 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 sfi->descTag.tagLocation = cpu_to_le32(*block);
293 dfibh.soffset = dfibh.eoffset;
294 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
295 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
296 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800297 sfi->fileIdent +
298 le16_to_cpu(sfi->lengthOfImpUse))) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800299 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700300 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 return NULL;
302 }
303 }
304 mark_buffer_dirty_inode(dbh, inode);
305
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800306 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
307 iinfo->i_lenAlloc);
308 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 eloc.logicalBlockNum = *block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800310 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800311 iinfo->i_location.partitionReferenceNum;
Jan Kara2c948b32009-12-03 13:39:28 +0100312 iinfo->i_lenExtents = inode->i_size;
Jan Karaff116fc2007-05-08 00:35:14 -0700313 epos.bh = NULL;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800314 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700315 epos.offset = udf_file_entry_alloc_offset(inode);
Jan Kara2c948b32009-12-03 13:39:28 +0100316 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 /* UniqueID stuff */
318
Jan Kara3bf25cb2007-05-08 00:35:16 -0700319 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 mark_inode_dirty(inode);
321 return dbh;
322}
323
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700324static int udf_get_block(struct inode *inode, sector_t block,
325 struct buffer_head *bh_result, int create)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
327 int err, new;
Marcin Slusarz1ed16172008-02-08 04:20:48 -0800328 sector_t phys = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800329 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700331 if (!create) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 phys = udf_block_map(inode, block);
333 if (phys)
334 map_bh(bh_result, inode->i_sb, phys);
335 return 0;
336 }
337
338 err = -EIO;
339 new = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800340 iinfo = UDF_I(inode);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100341
342 down_write(&iinfo->i_data_sem);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800343 if (block == iinfo->i_next_alloc_block + 1) {
344 iinfo->i_next_alloc_block++;
345 iinfo->i_next_alloc_goal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 }
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Jan Kara7b0b0932011-12-10 01:43:33 +0100349 phys = inode_getblk(inode, block, &err, &new);
350 if (!phys)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 goto abort;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353 if (new)
354 set_buffer_new(bh_result);
355 map_bh(bh_result, inode->i_sb, phys);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700356
357abort:
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100358 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360}
361
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700362static struct buffer_head *udf_getblk(struct inode *inode, long block,
363 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364{
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700365 struct buffer_head *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 struct buffer_head dummy;
367
368 dummy.b_state = 0;
369 dummy.b_blocknr = -1000;
370 *err = udf_get_block(inode, block, &dummy, create);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700371 if (!*err && buffer_mapped(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700373 if (buffer_new(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 lock_buffer(bh);
375 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
376 set_buffer_uptodate(bh);
377 unlock_buffer(bh);
378 mark_buffer_dirty_inode(bh, inode);
379 }
380 return bh;
381 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700382
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 return NULL;
384}
385
Jan Kara31170b62007-05-08 00:35:21 -0700386/* Extend the file by 'blocks' blocks, return the number of extents added */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200387static int udf_do_extend_file(struct inode *inode,
388 struct extent_position *last_pos,
389 struct kernel_long_ad *last_ext,
390 sector_t blocks)
Jan Kara31170b62007-05-08 00:35:21 -0700391{
392 sector_t add;
393 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
394 struct super_block *sb = inode->i_sb;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200395 struct kernel_lb_addr prealloc_loc = {};
Jan Kara31170b62007-05-08 00:35:21 -0700396 int prealloc_len = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800397 struct udf_inode_info *iinfo;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200398 int err;
Jan Kara31170b62007-05-08 00:35:21 -0700399
400 /* The previous extent is fake and we should not extend by anything
401 * - there's nothing to do... */
402 if (!blocks && fake)
403 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700404
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800405 iinfo = UDF_I(inode);
Jan Kara31170b62007-05-08 00:35:21 -0700406 /* Round the last extent up to a multiple of block size */
407 if (last_ext->extLength & (sb->s_blocksize - 1)) {
408 last_ext->extLength =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700409 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
410 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
411 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800412 iinfo->i_lenExtents =
413 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700414 ~(sb->s_blocksize - 1);
Jan Kara31170b62007-05-08 00:35:21 -0700415 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700416
Jan Kara31170b62007-05-08 00:35:21 -0700417 /* Last extent are just preallocated blocks? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800418 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
419 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700420 /* Save the extent so that we can reattach it to the end */
421 prealloc_loc = last_ext->extLocation;
422 prealloc_len = last_ext->extLength;
423 /* Mark the extent as a hole */
424 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700425 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
Jan Kara31170b62007-05-08 00:35:21 -0700426 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800427 last_ext->extLocation.partitionReferenceNum = 0;
Jan Kara31170b62007-05-08 00:35:21 -0700428 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700429
Jan Kara31170b62007-05-08 00:35:21 -0700430 /* Can we merge with the previous extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800431 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
432 EXT_NOT_RECORDED_NOT_ALLOCATED) {
433 add = ((1 << 30) - sb->s_blocksize -
434 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
435 sb->s_blocksize_bits;
Jan Kara31170b62007-05-08 00:35:21 -0700436 if (add > blocks)
437 add = blocks;
438 blocks -= add;
439 last_ext->extLength += add << sb->s_blocksize_bits;
440 }
441
442 if (fake) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200443 udf_add_aext(inode, last_pos, &last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700444 last_ext->extLength, 1);
Jan Kara31170b62007-05-08 00:35:21 -0700445 count++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800446 } else
Pekka Enberg97e961f2008-10-15 12:29:03 +0200447 udf_write_aext(inode, last_pos, &last_ext->extLocation,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800448 last_ext->extLength, 1);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700449
Jan Kara31170b62007-05-08 00:35:21 -0700450 /* Managed to do everything necessary? */
451 if (!blocks)
452 goto out;
453
454 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
455 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800456 last_ext->extLocation.partitionReferenceNum = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700457 add = (1 << (30-sb->s_blocksize_bits)) - 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800458 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
459 (add << sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700460
Jan Kara31170b62007-05-08 00:35:21 -0700461 /* Create enough extents to cover the whole hole */
462 while (blocks > add) {
463 blocks -= add;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200464 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
465 last_ext->extLength, 1);
466 if (err)
467 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700468 count++;
469 }
470 if (blocks) {
471 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700472 (blocks << sb->s_blocksize_bits);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200473 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
474 last_ext->extLength, 1);
475 if (err)
476 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700477 count++;
478 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700479
480out:
Jan Kara31170b62007-05-08 00:35:21 -0700481 /* Do we have some preallocated blocks saved? */
482 if (prealloc_len) {
Jan Kara7e49b6f2010-10-22 00:30:26 +0200483 err = udf_add_aext(inode, last_pos, &prealloc_loc,
484 prealloc_len, 1);
485 if (err)
486 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700487 last_ext->extLocation = prealloc_loc;
488 last_ext->extLength = prealloc_len;
489 count++;
490 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700491
Jan Kara31170b62007-05-08 00:35:21 -0700492 /* last_pos should point to the last written extent... */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800493 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200494 last_pos->offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800495 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200496 last_pos->offset -= sizeof(struct long_ad);
Jan Kara31170b62007-05-08 00:35:21 -0700497 else
Jan Kara7e49b6f2010-10-22 00:30:26 +0200498 return -EIO;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700499
Jan Kara31170b62007-05-08 00:35:21 -0700500 return count;
501}
502
Jan Kara7e49b6f2010-10-22 00:30:26 +0200503static int udf_extend_file(struct inode *inode, loff_t newsize)
504{
505
506 struct extent_position epos;
507 struct kernel_lb_addr eloc;
508 uint32_t elen;
509 int8_t etype;
510 struct super_block *sb = inode->i_sb;
511 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
512 int adsize;
513 struct udf_inode_info *iinfo = UDF_I(inode);
514 struct kernel_long_ad extent;
515 int err;
516
517 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
518 adsize = sizeof(struct short_ad);
519 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
520 adsize = sizeof(struct long_ad);
521 else
522 BUG();
523
524 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
525
526 /* File has extent covering the new size (could happen when extending
527 * inside a block)? */
528 if (etype != -1)
529 return 0;
530 if (newsize & (sb->s_blocksize - 1))
531 offset++;
532 /* Extended file just to the boundary of the last file block? */
533 if (offset == 0)
534 return 0;
535
536 /* Truncate is extending the file by 'offset' blocks */
537 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
538 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
539 /* File has no extents at all or has empty last
540 * indirect extent! Create a fake extent... */
541 extent.extLocation.logicalBlockNum = 0;
542 extent.extLocation.partitionReferenceNum = 0;
543 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
544 } else {
545 epos.offset -= adsize;
546 etype = udf_next_aext(inode, &epos, &extent.extLocation,
547 &extent.extLength, 0);
548 extent.extLength |= etype << 30;
549 }
550 err = udf_do_extend_file(inode, &epos, &extent, offset);
551 if (err < 0)
552 goto out;
553 err = 0;
554 iinfo->i_lenExtents = newsize;
555out:
556 brelse(epos.bh);
557 return err;
558}
559
Jan Kara7b0b0932011-12-10 01:43:33 +0100560static sector_t inode_getblk(struct inode *inode, sector_t block,
561 int *err, int *new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562{
Jan Kara31170b62007-05-08 00:35:21 -0700563 static sector_t last_block;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200564 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
Jan Karaff116fc2007-05-08 00:35:14 -0700565 struct extent_position prev_epos, cur_epos, next_epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 int count = 0, startnum = 0, endnum = 0;
Jan Kara85d71242007-06-01 00:46:29 -0700567 uint32_t elen = 0, tmpelen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200568 struct kernel_lb_addr eloc, tmpeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 int c = 1;
Jan Kara60448b12007-05-08 00:35:13 -0700570 loff_t lbcount = 0, b_off = 0;
571 uint32_t newblocknum, newblock;
572 sector_t offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800574 struct udf_inode_info *iinfo = UDF_I(inode);
575 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
Jan Kara31170b62007-05-08 00:35:21 -0700576 int lastblock = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Jan Kara7b0b0932011-12-10 01:43:33 +0100578 *err = 0;
579 *new = 0;
Jan Karaff116fc2007-05-08 00:35:14 -0700580 prev_epos.offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800581 prev_epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700582 prev_epos.bh = NULL;
583 cur_epos = next_epos = prev_epos;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700584 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
586 /* find the extent which contains the block we are looking for.
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700587 alternate between laarr[0] and laarr[1] for locations of the
588 current extent, and the previous extent */
589 do {
590 if (prev_epos.bh != cur_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700591 brelse(prev_epos.bh);
592 get_bh(cur_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700593 prev_epos.bh = cur_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700595 if (cur_epos.bh != next_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700596 brelse(cur_epos.bh);
597 get_bh(next_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700598 cur_epos.bh = next_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 }
600
601 lbcount += elen;
602
Jan Karaff116fc2007-05-08 00:35:14 -0700603 prev_epos.block = cur_epos.block;
604 cur_epos.block = next_epos.block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
Jan Karaff116fc2007-05-08 00:35:14 -0700606 prev_epos.offset = cur_epos.offset;
607 cur_epos.offset = next_epos.offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Marcin Slusarz4b111112008-02-08 04:20:36 -0800609 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
610 if (etype == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 break;
612
613 c = !c;
614
615 laarr[c].extLength = (etype << 30) | elen;
616 laarr[c].extLocation = eloc;
617
618 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
619 pgoal = eloc.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700620 ((elen + inode->i_sb->s_blocksize - 1) >>
621 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700623 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 } while (lbcount + elen <= b_off);
625
626 b_off -= lbcount;
627 offset = b_off >> inode->i_sb->s_blocksize_bits;
Jan Kara85d71242007-06-01 00:46:29 -0700628 /*
629 * Move prev_epos and cur_epos into indirect extent if we are at
630 * the pointer to it
631 */
632 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
633 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
635 /* if the extent is allocated and recorded, return the block
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700636 if the extent is not a multiple of the blocksize, round up */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700638 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
639 if (elen & (inode->i_sb->s_blocksize - 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 elen = EXT_RECORDED_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700641 ((elen + inode->i_sb->s_blocksize - 1) &
642 ~(inode->i_sb->s_blocksize - 1));
Jan Kara7e49b6f2010-10-22 00:30:26 +0200643 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 }
Jan Kara3bf25cb2007-05-08 00:35:16 -0700645 brelse(prev_epos.bh);
646 brelse(cur_epos.bh);
647 brelse(next_epos.bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200648 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
Jan Kara7b0b0932011-12-10 01:43:33 +0100649 return newblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 }
651
Jan Kara31170b62007-05-08 00:35:21 -0700652 last_block = block;
653 /* Are we beyond EOF? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700654 if (etype == -1) {
Jan Kara31170b62007-05-08 00:35:21 -0700655 int ret;
656
657 if (count) {
658 if (c)
659 laarr[0] = laarr[1];
660 startnum = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700661 } else {
Jan Kara31170b62007-05-08 00:35:21 -0700662 /* Create a fake extent when there's not one */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800663 memset(&laarr[0].extLocation, 0x00,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200664 sizeof(struct kernel_lb_addr));
Jan Kara31170b62007-05-08 00:35:21 -0700665 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200666 /* Will udf_do_extend_file() create real extent from
Marcin Slusarz4b111112008-02-08 04:20:36 -0800667 a fake one? */
Jan Kara31170b62007-05-08 00:35:21 -0700668 startnum = (offset > 0);
669 }
670 /* Create extents for the hole between EOF and offset */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200671 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
672 if (ret < 0) {
Jan Kara31170b62007-05-08 00:35:21 -0700673 brelse(prev_epos.bh);
674 brelse(cur_epos.bh);
675 brelse(next_epos.bh);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200676 *err = ret;
Jan Kara7b0b0932011-12-10 01:43:33 +0100677 return 0;
Jan Kara31170b62007-05-08 00:35:21 -0700678 }
679 c = 0;
680 offset = 0;
681 count += ret;
682 /* We are not covered by a preallocated extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800683 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
684 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700685 /* Is there any real extent? - otherwise we overwrite
686 * the fake one... */
687 if (count)
688 c = !c;
689 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700690 inode->i_sb->s_blocksize;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800691 memset(&laarr[c].extLocation, 0x00,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200692 sizeof(struct kernel_lb_addr));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700693 count++;
694 endnum++;
Jan Kara31170b62007-05-08 00:35:21 -0700695 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700696 endnum = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 lastblock = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700698 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 endnum = startnum = ((count > 2) ? 2 : count);
700
Marcin Slusarz4b111112008-02-08 04:20:36 -0800701 /* if the current extent is in position 0,
702 swap it with the previous */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700703 if (!c && count != 1) {
Jan Kara31170b62007-05-08 00:35:21 -0700704 laarr[2] = laarr[0];
705 laarr[0] = laarr[1];
706 laarr[1] = laarr[2];
707 c = 1;
708 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
Marcin Slusarz4b111112008-02-08 04:20:36 -0800710 /* if the current block is located in an extent,
711 read the next extent */
712 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
713 if (etype != -1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700714 laarr[c + 1].extLength = (etype << 30) | elen;
715 laarr[c + 1].extLocation = eloc;
716 count++;
717 startnum++;
718 endnum++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800719 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 lastblock = 1;
721 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722
723 /* if the current extent is not recorded but allocated, get the
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700724 * block in the extent corresponding to the requested block */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800725 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800727 else { /* otherwise, allocate a new block */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800728 if (iinfo->i_next_alloc_block == block)
729 goal = iinfo->i_next_alloc_goal;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700731 if (!goal) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800732 if (!(goal = pgoal)) /* XXX: what was intended here? */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800733 goal = iinfo->i_location.logicalBlockNum + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 }
735
Marcin Slusarz4b111112008-02-08 04:20:36 -0800736 newblocknum = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800737 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800738 goal, err);
739 if (!newblocknum) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700740 brelse(prev_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 *err = -ENOSPC;
Jan Kara7b0b0932011-12-10 01:43:33 +0100742 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800744 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 }
746
Marcin Slusarz4b111112008-02-08 04:20:36 -0800747 /* if the extent the requsted block is located in contains multiple
748 * blocks, split the extent into at most three extents. blocks prior
749 * to requested block, requested block, and blocks after requested
750 * block */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
752
753#ifdef UDF_PREALLOCATE
Jan Kara81056dd2009-07-16 18:02:25 +0200754 /* We preallocate blocks only for regular files. It also makes sense
755 * for directories but there's a problem when to drop the
756 * preallocation. We might use some delayed work for that but I feel
757 * it's overengineering for a filesystem like UDF. */
758 if (S_ISREG(inode->i_mode))
759 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760#endif
761
762 /* merge any continuous blocks in laarr */
763 udf_merge_extents(inode, laarr, &endnum);
764
765 /* write back the new extents, inserting new extents if the new number
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700766 * of extents is greater than the old number, and deleting extents if
767 * the new number of extents is less than the old number */
Jan Karaff116fc2007-05-08 00:35:14 -0700768 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
Jan Kara3bf25cb2007-05-08 00:35:16 -0700770 brelse(prev_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
Marcin Slusarz4b111112008-02-08 04:20:36 -0800772 newblock = udf_get_pblock(inode->i_sb, newblocknum,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800773 iinfo->i_location.partitionReferenceNum, 0);
Jan Kara7b0b0932011-12-10 01:43:33 +0100774 if (!newblock) {
775 *err = -EIO;
776 return 0;
777 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 *new = 1;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800779 iinfo->i_next_alloc_block = block;
780 iinfo->i_next_alloc_goal = newblocknum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 inode->i_ctime = current_fs_time(inode->i_sb);
782
783 if (IS_SYNC(inode))
784 udf_sync_inode(inode);
785 else
786 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700787
Jan Kara7b0b0932011-12-10 01:43:33 +0100788 return newblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789}
790
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700791static void udf_split_extents(struct inode *inode, int *c, int offset,
792 int newblocknum,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200793 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700794 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800796 unsigned long blocksize = inode->i_sb->s_blocksize;
797 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
Marcin Slusarz4b111112008-02-08 04:20:36 -0800800 (laarr[*c].extLength >> 30) ==
801 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 int curr = *c;
803 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800804 blocksize - 1) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 int8_t etype = (laarr[curr].extLength >> 30);
806
Marcin Slusarz4b111112008-02-08 04:20:36 -0800807 if (blen == 1)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700808 ;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800809 else if (!offset || blen == offset + 1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700810 laarr[curr + 2] = laarr[curr + 1];
811 laarr[curr + 1] = laarr[curr];
812 } else {
813 laarr[curr + 3] = laarr[curr + 1];
814 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 }
816
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700817 if (offset) {
818 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800819 udf_free_blocks(inode->i_sb, inode,
Pekka Enberg97e961f2008-10-15 12:29:03 +0200820 &laarr[curr].extLocation,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800821 0, offset);
822 laarr[curr].extLength =
823 EXT_NOT_RECORDED_NOT_ALLOCATED |
824 (offset << blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 laarr[curr].extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800826 laarr[curr].extLocation.
827 partitionReferenceNum = 0;
828 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800830 (offset << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700831 curr++;
832 (*c)++;
833 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -0700835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 laarr[curr].extLocation.logicalBlockNum = newblocknum;
837 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
838 laarr[curr].extLocation.partitionReferenceNum =
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800839 UDF_I(inode)->i_location.partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800841 blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700842 curr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700844 if (blen != offset + 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800846 laarr[curr].extLocation.logicalBlockNum +=
847 offset + 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700848 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800849 ((blen - (offset + 1)) << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700850 curr++;
851 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 }
853 }
854}
855
856static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200857 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700858 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859{
860 int start, length = 0, currlength = 0, i;
861
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700862 if (*endnum >= (c + 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 if (!lastblock)
864 return;
865 else
866 start = c;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700867 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800868 if ((laarr[c + 1].extLength >> 30) ==
869 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700870 start = c + 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800871 length = currlength =
872 (((laarr[c + 1].extLength &
873 UDF_EXTENT_LENGTH_MASK) +
874 inode->i_sb->s_blocksize - 1) >>
875 inode->i_sb->s_blocksize_bits);
876 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 start = c;
878 }
879
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700880 for (i = start + 1; i <= *endnum; i++) {
881 if (i == *endnum) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 if (lastblock)
883 length += UDF_DEFAULT_PREALLOC_BLOCKS;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800884 } else if ((laarr[i].extLength >> 30) ==
885 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
886 length += (((laarr[i].extLength &
887 UDF_EXTENT_LENGTH_MASK) +
888 inode->i_sb->s_blocksize - 1) >>
889 inode->i_sb->s_blocksize_bits);
890 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 break;
892 }
893
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700894 if (length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 int next = laarr[start].extLocation.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700896 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800897 inode->i_sb->s_blocksize - 1) >>
898 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800900 laarr[start].extLocation.partitionReferenceNum,
901 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
902 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
903 currlength);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700904 if (numalloc) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800905 if (start == (c + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 laarr[start].extLength +=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800907 (numalloc <<
908 inode->i_sb->s_blocksize_bits);
909 else {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700910 memmove(&laarr[c + 2], &laarr[c + 1],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200911 sizeof(struct long_ad) * (*endnum - (c + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700912 (*endnum)++;
913 laarr[c + 1].extLocation.logicalBlockNum = next;
914 laarr[c + 1].extLocation.partitionReferenceNum =
Marcin Slusarz4b111112008-02-08 04:20:36 -0800915 laarr[c].extLocation.
916 partitionReferenceNum;
917 laarr[c + 1].extLength =
918 EXT_NOT_RECORDED_ALLOCATED |
919 (numalloc <<
920 inode->i_sb->s_blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700921 start = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 }
923
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700924 for (i = start + 1; numalloc && i < *endnum; i++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800925 int elen = ((laarr[i].extLength &
926 UDF_EXTENT_LENGTH_MASK) +
927 inode->i_sb->s_blocksize - 1) >>
928 inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700930 if (elen > numalloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 laarr[i].extLength -=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800932 (numalloc <<
933 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 numalloc = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700935 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 numalloc -= elen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700937 if (*endnum > (i + 1))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800938 memmove(&laarr[i],
939 &laarr[i + 1],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200940 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -0800941 (*endnum - (i + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700942 i--;
943 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 }
945 }
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800946 UDF_I(inode)->i_lenExtents +=
Marcin Slusarz4b111112008-02-08 04:20:36 -0800947 numalloc << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 }
949 }
950}
951
952static void udf_merge_extents(struct inode *inode,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200953 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700954 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955{
956 int i;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800957 unsigned long blocksize = inode->i_sb->s_blocksize;
958 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700960 for (i = 0; i < (*endnum - 1); i++) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200961 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
962 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963
Marcin Slusarz4b111112008-02-08 04:20:36 -0800964 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
965 (((li->extLength >> 30) ==
966 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
967 ((lip1->extLocation.logicalBlockNum -
968 li->extLocation.logicalBlockNum) ==
969 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
970 blocksize - 1) >> blocksize_bits)))) {
971
972 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
973 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
974 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
975 lip1->extLength = (lip1->extLength -
976 (li->extLength &
977 UDF_EXTENT_LENGTH_MASK) +
978 UDF_EXTENT_LENGTH_MASK) &
979 ~(blocksize - 1);
980 li->extLength = (li->extLength &
981 UDF_EXTENT_FLAG_MASK) +
982 (UDF_EXTENT_LENGTH_MASK + 1) -
983 blocksize;
984 lip1->extLocation.logicalBlockNum =
985 li->extLocation.logicalBlockNum +
986 ((li->extLength &
987 UDF_EXTENT_LENGTH_MASK) >>
988 blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700989 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800990 li->extLength = lip1->extLength +
991 (((li->extLength &
992 UDF_EXTENT_LENGTH_MASK) +
993 blocksize - 1) & ~(blocksize - 1));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700994 if (*endnum > (i + 2))
995 memmove(&laarr[i + 1], &laarr[i + 2],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200996 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -0800997 (*endnum - (i + 2)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700998 i--;
999 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001001 } else if (((li->extLength >> 30) ==
1002 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1003 ((lip1->extLength >> 30) ==
1004 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02001005 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001006 ((li->extLength &
1007 UDF_EXTENT_LENGTH_MASK) +
1008 blocksize - 1) >> blocksize_bits);
1009 li->extLocation.logicalBlockNum = 0;
1010 li->extLocation.partitionReferenceNum = 0;
1011
1012 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1013 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1014 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1015 lip1->extLength = (lip1->extLength -
1016 (li->extLength &
1017 UDF_EXTENT_LENGTH_MASK) +
1018 UDF_EXTENT_LENGTH_MASK) &
1019 ~(blocksize - 1);
1020 li->extLength = (li->extLength &
1021 UDF_EXTENT_FLAG_MASK) +
1022 (UDF_EXTENT_LENGTH_MASK + 1) -
1023 blocksize;
1024 } else {
1025 li->extLength = lip1->extLength +
1026 (((li->extLength &
1027 UDF_EXTENT_LENGTH_MASK) +
1028 blocksize - 1) & ~(blocksize - 1));
1029 if (*endnum > (i + 2))
1030 memmove(&laarr[i + 1], &laarr[i + 2],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001031 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001032 (*endnum - (i + 2)));
1033 i--;
1034 (*endnum)--;
1035 }
1036 } else if ((li->extLength >> 30) ==
1037 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1038 udf_free_blocks(inode->i_sb, inode,
Pekka Enberg97e961f2008-10-15 12:29:03 +02001039 &li->extLocation, 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001040 ((li->extLength &
1041 UDF_EXTENT_LENGTH_MASK) +
1042 blocksize - 1) >> blocksize_bits);
1043 li->extLocation.logicalBlockNum = 0;
1044 li->extLocation.partitionReferenceNum = 0;
1045 li->extLength = (li->extLength &
1046 UDF_EXTENT_LENGTH_MASK) |
1047 EXT_NOT_RECORDED_NOT_ALLOCATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 }
1049 }
1050}
1051
1052static void udf_update_extents(struct inode *inode,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001053 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001054 int startnum, int endnum,
1055 struct extent_position *epos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056{
1057 int start = 0, i;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001058 struct kernel_lb_addr tmploc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 uint32_t tmplen;
1060
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001061 if (startnum > endnum) {
1062 for (i = 0; i < (startnum - endnum); i++)
Jan Karaff116fc2007-05-08 00:35:14 -07001063 udf_delete_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001064 laarr[i].extLength);
1065 } else if (startnum < endnum) {
1066 for (i = 0; i < (endnum - startnum); i++) {
Jan Karaff116fc2007-05-08 00:35:14 -07001067 udf_insert_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001068 laarr[i].extLength);
Jan Karaff116fc2007-05-08 00:35:14 -07001069 udf_next_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001070 &laarr[i].extLength, 1);
1071 start++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 }
1073 }
1074
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001075 for (i = start; i < endnum; i++) {
Jan Karaff116fc2007-05-08 00:35:14 -07001076 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001077 udf_write_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001078 laarr[i].extLength, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 }
1080}
1081
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001082struct buffer_head *udf_bread(struct inode *inode, int block,
1083 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001085 struct buffer_head *bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
1087 bh = udf_getblk(inode, block, create, err);
1088 if (!bh)
1089 return NULL;
1090
1091 if (buffer_uptodate(bh))
1092 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001093
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 ll_rw_block(READ, 1, &bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001095
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 wait_on_buffer(bh);
1097 if (buffer_uptodate(bh))
1098 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001099
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 brelse(bh);
1101 *err = -EIO;
1102 return NULL;
1103}
1104
Jan Kara7e49b6f2010-10-22 00:30:26 +02001105int udf_setsize(struct inode *inode, loff_t newsize)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001108 struct udf_inode_info *iinfo;
Jan Kara7e49b6f2010-10-22 00:30:26 +02001109 int bsize = 1 << inode->i_blkbits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
1111 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001112 S_ISLNK(inode->i_mode)))
Jan Kara7e49b6f2010-10-22 00:30:26 +02001113 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
Jan Kara7e49b6f2010-10-22 00:30:26 +02001115 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001117 iinfo = UDF_I(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001118 if (newsize > inode->i_size) {
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001119 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001120 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1121 if (bsize <
1122 (udf_file_entry_alloc_offset(inode) + newsize)) {
1123 err = udf_expand_file_adinicb(inode);
Jan Karad2eb8c32011-12-10 02:30:48 +01001124 if (err)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001125 return err;
Jan Karad2eb8c32011-12-10 02:30:48 +01001126 down_write(&iinfo->i_data_sem);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001127 } else
Jan Kara7e49b6f2010-10-22 00:30:26 +02001128 iinfo->i_lenAlloc = newsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 }
Jan Kara7e49b6f2010-10-22 00:30:26 +02001130 err = udf_extend_file(inode, newsize);
1131 if (err) {
1132 up_write(&iinfo->i_data_sem);
1133 return err;
1134 }
1135 truncate_setsize(inode, newsize);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001136 up_write(&iinfo->i_data_sem);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001137 } else {
Jan Kara7e49b6f2010-10-22 00:30:26 +02001138 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1139 down_write(&iinfo->i_data_sem);
1140 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1141 0x00, bsize - newsize -
1142 udf_file_entry_alloc_offset(inode));
1143 iinfo->i_lenAlloc = newsize;
1144 truncate_setsize(inode, newsize);
1145 up_write(&iinfo->i_data_sem);
1146 goto update_time;
1147 }
1148 err = block_truncate_page(inode->i_mapping, newsize,
1149 udf_get_block);
1150 if (err)
1151 return err;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001152 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001153 truncate_setsize(inode, newsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 udf_truncate_extents(inode);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001155 up_write(&iinfo->i_data_sem);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001156 }
Jan Kara7e49b6f2010-10-22 00:30:26 +02001157update_time:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1159 if (IS_SYNC(inode))
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001160 udf_sync_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 else
1162 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001163 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164}
1165
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001166static void __udf_read_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167{
1168 struct buffer_head *bh = NULL;
1169 struct fileEntry *fe;
1170 uint16_t ident;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001171 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173 /*
1174 * Set defaults, but the inode is still incomplete!
1175 * Note: get_new_inode() sets the following on a new inode:
1176 * i_sb = sb
1177 * i_no = ino
1178 * i_flags = sb->s_flags
1179 * i_state = 0
1180 * clean_inode(): zero fills and sets
1181 * i_count = 1
1182 * i_nlink = 1
1183 * i_op = NULL;
1184 */
Pekka Enberg97e961f2008-10-15 12:29:03 +02001185 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001186 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07001187 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 make_bad_inode(inode);
1189 return;
1190 }
1191
1192 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001193 ident != TAG_IDENT_USE) {
Joe Perches78ace702011-10-10 01:08:05 -07001194 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1195 inode->i_ino, ident);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001196 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 make_bad_inode(inode);
1198 return;
1199 }
1200
1201 fe = (struct fileEntry *)bh->b_data;
1202
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001203 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001204 struct buffer_head *ibh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205
Pekka Enberg97e961f2008-10-15 12:29:03 +02001206 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001207 &ident);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001208 if (ident == TAG_IDENT_IE && ibh) {
1209 struct buffer_head *nbh = NULL;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001210 struct kernel_lb_addr loc;
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001211 struct indirectEntry *ie;
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001212
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001213 ie = (struct indirectEntry *)ibh->b_data;
1214 loc = lelb_to_cpu(ie->indirectICB.extLocation);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001215
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001216 if (ie->indirectICB.extLength &&
Pekka Enberg97e961f2008-10-15 12:29:03 +02001217 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0,
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001218 &ident))) {
1219 if (ident == TAG_IDENT_FE ||
1220 ident == TAG_IDENT_EFE) {
1221 memcpy(&iinfo->i_location,
1222 &loc,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001223 sizeof(struct kernel_lb_addr));
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001224 brelse(bh);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001225 brelse(ibh);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001226 brelse(nbh);
1227 __udf_read_inode(inode);
1228 return;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001229 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001230 brelse(nbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001232 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001233 brelse(ibh);
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001234 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
Joe Perches78ace702011-10-10 01:08:05 -07001235 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1236 le16_to_cpu(fe->icbTag.strategyType));
Jan Kara3bf25cb2007-05-08 00:35:16 -07001237 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 make_bad_inode(inode);
1239 return;
1240 }
1241 udf_fill_inode(inode, bh);
Jan Kara31170b62007-05-08 00:35:21 -07001242
Jan Kara3bf25cb2007-05-08 00:35:16 -07001243 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244}
1245
1246static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1247{
1248 struct fileEntry *fe;
1249 struct extendedFileEntry *efe;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001250 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001251 struct udf_inode_info *iinfo = UDF_I(inode);
Miklos Szeredibfe86842011-10-28 14:13:29 +02001252 unsigned int link_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253
1254 fe = (struct fileEntry *)bh->b_data;
1255 efe = (struct extendedFileEntry *)bh->b_data;
1256
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001257 if (fe->icbTag.strategyType == cpu_to_le16(4))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001258 iinfo->i_strat4096 = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001259 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001260 iinfo->i_strat4096 = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001262 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
Marcin Slusarz4b111112008-02-08 04:20:36 -08001263 ICBTAG_FLAG_AD_MASK;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001264 iinfo->i_unique = 0;
1265 iinfo->i_lenEAttr = 0;
1266 iinfo->i_lenExtents = 0;
1267 iinfo->i_lenAlloc = 0;
1268 iinfo->i_next_alloc_block = 0;
1269 iinfo->i_next_alloc_goal = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001270 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001271 iinfo->i_efe = 1;
1272 iinfo->i_use = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001273 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1274 sizeof(struct extendedFileEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001275 make_bad_inode(inode);
1276 return;
1277 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001278 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001279 bh->b_data + sizeof(struct extendedFileEntry),
1280 inode->i_sb->s_blocksize -
1281 sizeof(struct extendedFileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001282 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001283 iinfo->i_efe = 0;
1284 iinfo->i_use = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001285 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1286 sizeof(struct fileEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001287 make_bad_inode(inode);
1288 return;
1289 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001290 memcpy(iinfo->i_ext.i_data,
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001291 bh->b_data + sizeof(struct fileEntry),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001292 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001293 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001294 iinfo->i_efe = 0;
1295 iinfo->i_use = 1;
1296 iinfo->i_lenAlloc = le32_to_cpu(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001297 ((struct unallocSpaceEntry *)bh->b_data)->
1298 lengthAllocDescs);
1299 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1300 sizeof(struct unallocSpaceEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001301 make_bad_inode(inode);
1302 return;
1303 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001304 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001305 bh->b_data + sizeof(struct unallocSpaceEntry),
1306 inode->i_sb->s_blocksize -
1307 sizeof(struct unallocSpaceEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 return;
1309 }
1310
Jan Karac03cad22010-10-20 22:17:28 +02001311 read_lock(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 inode->i_uid = le32_to_cpu(fe->uid);
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001313 if (inode->i_uid == -1 ||
1314 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1315 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001316 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317
1318 inode->i_gid = le32_to_cpu(fe->gid);
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001319 if (inode->i_gid == -1 ||
1320 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1321 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001322 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001324 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001325 sbi->s_fmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001326 inode->i_mode = sbi->s_fmode;
1327 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001328 sbi->s_dmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001329 inode->i_mode = sbi->s_dmode;
1330 else
1331 inode->i_mode = udf_convert_permissions(fe);
1332 inode->i_mode &= ~sbi->s_umask;
Jan Karac03cad22010-10-20 22:17:28 +02001333 read_unlock(&sbi->s_cred_lock);
1334
Miklos Szeredibfe86842011-10-28 14:13:29 +02001335 link_count = le16_to_cpu(fe->fileLinkCount);
1336 if (!link_count)
1337 link_count = 1;
1338 set_nlink(inode, link_count);
Jan Karac03cad22010-10-20 22:17:28 +02001339
1340 inode->i_size = le64_to_cpu(fe->informationLength);
1341 iinfo->i_lenExtents = inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001343 if (iinfo->i_efe == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001345 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346
Marcin Slusarz56774802008-02-10 11:25:31 +01001347 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001348 inode->i_atime = sbi->s_record_time;
1349
Marcin Slusarz56774802008-02-10 11:25:31 +01001350 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1351 fe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001352 inode->i_mtime = sbi->s_record_time;
1353
Marcin Slusarz56774802008-02-10 11:25:31 +01001354 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001355 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001357 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1358 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1359 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001360 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001361 } else {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001362 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001363 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364
Marcin Slusarz56774802008-02-10 11:25:31 +01001365 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001366 inode->i_atime = sbi->s_record_time;
1367
Marcin Slusarz56774802008-02-10 11:25:31 +01001368 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1369 efe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001370 inode->i_mtime = sbi->s_record_time;
1371
Marcin Slusarz56774802008-02-10 11:25:31 +01001372 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001373 iinfo->i_crtime = sbi->s_record_time;
1374
Marcin Slusarz56774802008-02-10 11:25:31 +01001375 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001376 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001378 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1379 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1380 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001381 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 }
1383
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001384 switch (fe->icbTag.fileType) {
1385 case ICBTAG_FILE_TYPE_DIRECTORY:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001386 inode->i_op = &udf_dir_inode_operations;
1387 inode->i_fop = &udf_dir_operations;
1388 inode->i_mode |= S_IFDIR;
1389 inc_nlink(inode);
1390 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001391 case ICBTAG_FILE_TYPE_REALTIME:
1392 case ICBTAG_FILE_TYPE_REGULAR:
1393 case ICBTAG_FILE_TYPE_UNDEF:
Jan Kara742e1792008-04-08 01:17:52 +02001394 case ICBTAG_FILE_TYPE_VAT20:
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001395 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001396 inode->i_data.a_ops = &udf_adinicb_aops;
1397 else
1398 inode->i_data.a_ops = &udf_aops;
1399 inode->i_op = &udf_file_inode_operations;
1400 inode->i_fop = &udf_file_operations;
1401 inode->i_mode |= S_IFREG;
1402 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001403 case ICBTAG_FILE_TYPE_BLOCK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001404 inode->i_mode |= S_IFBLK;
1405 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001406 case ICBTAG_FILE_TYPE_CHAR:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001407 inode->i_mode |= S_IFCHR;
1408 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001409 case ICBTAG_FILE_TYPE_FIFO:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001410 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1411 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001412 case ICBTAG_FILE_TYPE_SOCKET:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001413 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1414 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001415 case ICBTAG_FILE_TYPE_SYMLINK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001416 inode->i_data.a_ops = &udf_symlink_aops;
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001417 inode->i_op = &udf_symlink_inode_operations;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001418 inode->i_mode = S_IFLNK | S_IRWXUGO;
1419 break;
Jan Karabfb257a2008-04-08 20:37:21 +02001420 case ICBTAG_FILE_TYPE_MAIN:
1421 udf_debug("METADATA FILE-----\n");
1422 break;
1423 case ICBTAG_FILE_TYPE_MIRROR:
1424 udf_debug("METADATA MIRROR FILE-----\n");
1425 break;
1426 case ICBTAG_FILE_TYPE_BITMAP:
1427 udf_debug("METADATA BITMAP FILE-----\n");
1428 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001429 default:
Joe Perches78ace702011-10-10 01:08:05 -07001430 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1431 inode->i_ino, fe->icbTag.fileType);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001432 make_bad_inode(inode);
1433 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001435 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001436 struct deviceSpec *dsea =
1437 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001438 if (dsea) {
1439 init_special_inode(inode, inode->i_mode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001440 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1441 le32_to_cpu(dsea->minorDeviceIdent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 /* Developer ID ??? */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001443 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 make_bad_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445 }
1446}
1447
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001448static int udf_alloc_i_data(struct inode *inode, size_t size)
1449{
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001450 struct udf_inode_info *iinfo = UDF_I(inode);
1451 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001452
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001453 if (!iinfo->i_ext.i_data) {
Joe Perches78ace702011-10-10 01:08:05 -07001454 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1455 inode->i_ino);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001456 return -ENOMEM;
1457 }
1458
1459 return 0;
1460}
1461
Al Virofaa17292011-07-26 03:18:29 -04001462static umode_t udf_convert_permissions(struct fileEntry *fe)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463{
Al Virofaa17292011-07-26 03:18:29 -04001464 umode_t mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465 uint32_t permissions;
1466 uint32_t flags;
1467
1468 permissions = le32_to_cpu(fe->permissions);
1469 flags = le16_to_cpu(fe->icbTag.flags);
1470
Marcin Slusarz4b111112008-02-08 04:20:36 -08001471 mode = ((permissions) & S_IRWXO) |
1472 ((permissions >> 2) & S_IRWXG) |
1473 ((permissions >> 4) & S_IRWXU) |
1474 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1475 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1476 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
1478 return mode;
1479}
1480
Christoph Hellwiga9185b42010-03-05 09:21:37 +01001481int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482{
Jan Kara49521de2010-10-20 17:42:44 +02001483 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484}
1485
Jan Kara49521de2010-10-20 17:42:44 +02001486static int udf_sync_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487{
1488 return udf_update_inode(inode, 1);
1489}
1490
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001491static int udf_update_inode(struct inode *inode, int do_sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492{
1493 struct buffer_head *bh = NULL;
1494 struct fileEntry *fe;
1495 struct extendedFileEntry *efe;
Steve Nickelb2527bf2012-02-16 12:53:53 -05001496 uint64_t lb_recorded;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 uint32_t udfperms;
1498 uint16_t icbflags;
1499 uint16_t crclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 int err = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001501 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001502 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001503 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504
Jan Kara5833ded2010-01-08 16:52:59 +01001505 bh = udf_tgetblk(inode->i_sb,
1506 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001507 if (!bh) {
Jan Karaaae917c2010-01-08 16:46:29 +01001508 udf_debug("getblk failure\n");
1509 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 }
1511
Jan Karaaae917c2010-01-08 16:46:29 +01001512 lock_buffer(bh);
1513 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514 fe = (struct fileEntry *)bh->b_data;
1515 efe = (struct extendedFileEntry *)bh->b_data;
1516
Jan Karaaae917c2010-01-08 16:46:29 +01001517 if (iinfo->i_use) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518 struct unallocSpaceEntry *use =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001519 (struct unallocSpaceEntry *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001521 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001522 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001523 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001524 sizeof(struct unallocSpaceEntry));
Jan Karaaae917c2010-01-08 16:46:29 +01001525 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1526 use->descTag.tagLocation =
1527 cpu_to_le32(iinfo->i_location.logicalBlockNum);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001528 crclen = sizeof(struct unallocSpaceEntry) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001529 iinfo->i_lenAlloc - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 use->descTag.descCRCLength = cpu_to_le16(crclen);
Bob Copelandf845fce2008-04-17 09:47:48 +02001531 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001532 sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001533 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001534 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Jan Karaaae917c2010-01-08 16:46:29 +01001536 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537 }
1538
Phillip Susi4d6660e2006-03-07 21:55:24 -08001539 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1540 fe->uid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001541 else
1542 fe->uid = cpu_to_le32(inode->i_uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543
Phillip Susi4d6660e2006-03-07 21:55:24 -08001544 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1545 fe->gid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001546 else
1547 fe->gid = cpu_to_le32(inode->i_gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548
Marcin Slusarz4b111112008-02-08 04:20:36 -08001549 udfperms = ((inode->i_mode & S_IRWXO)) |
1550 ((inode->i_mode & S_IRWXG) << 2) |
1551 ((inode->i_mode & S_IRWXU) << 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552
Marcin Slusarz4b111112008-02-08 04:20:36 -08001553 udfperms |= (le32_to_cpu(fe->permissions) &
1554 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1555 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1556 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 fe->permissions = cpu_to_le32(udfperms);
1558
1559 if (S_ISDIR(inode->i_mode))
1560 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1561 else
1562 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1563
1564 fe->informationLength = cpu_to_le64(inode->i_size);
1565
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001566 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001567 struct regid *eid;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001568 struct deviceSpec *dsea =
1569 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001570 if (!dsea) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 dsea = (struct deviceSpec *)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001572 udf_add_extendedattr(inode,
1573 sizeof(struct deviceSpec) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001574 sizeof(struct regid), 12, 0x3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 dsea->attrType = cpu_to_le32(12);
1576 dsea->attrSubtype = 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001577 dsea->attrLength = cpu_to_le32(
1578 sizeof(struct deviceSpec) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001579 sizeof(struct regid));
1580 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581 }
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001582 eid = (struct regid *)dsea->impUse;
1583 memset(eid, 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 strcpy(eid->ident, UDF_ID_DEVELOPER);
1585 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1586 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1587 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1588 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1589 }
1590
Steve Nickelb2527bf2012-02-16 12:53:53 -05001591 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1592 lb_recorded = 0; /* No extents => no blocks! */
1593 else
1594 lb_recorded =
1595 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1596 (blocksize_bits - 9);
1597
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001598 if (iinfo->i_efe == 0) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001599 memcpy(bh->b_data + sizeof(struct fileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001600 iinfo->i_ext.i_data,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001601 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Steve Nickelb2527bf2012-02-16 12:53:53 -05001602 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603
Marcin Slusarz56774802008-02-10 11:25:31 +01001604 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1605 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1606 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001607 memset(&(fe->impIdent), 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1609 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1610 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001611 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1612 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1613 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001614 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1616 crclen = sizeof(struct fileEntry);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001617 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001618 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001619 iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001620 inode->i_sb->s_blocksize -
1621 sizeof(struct extendedFileEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 efe->objectSize = cpu_to_le64(inode->i_size);
Steve Nickelb2527bf2012-02-16 12:53:53 -05001623 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001625 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1626 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1627 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1628 iinfo->i_crtime = inode->i_atime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001629
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001630 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1631 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1632 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1633 iinfo->i_crtime = inode->i_mtime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001634
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001635 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1636 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1637 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1638 iinfo->i_crtime = inode->i_ctime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639
Marcin Slusarz56774802008-02-10 11:25:31 +01001640 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1641 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1642 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1643 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001645 memset(&(efe->impIdent), 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1647 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1648 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001649 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1650 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1651 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001652 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1654 crclen = sizeof(struct extendedFileEntry);
1655 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001656 if (iinfo->i_strat4096) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 fe->icbTag.strategyType = cpu_to_le16(4096);
1658 fe->icbTag.strategyParameter = cpu_to_le16(1);
1659 fe->icbTag.numEntries = cpu_to_le16(2);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001660 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661 fe->icbTag.strategyType = cpu_to_le16(4);
1662 fe->icbTag.numEntries = cpu_to_le16(1);
1663 }
1664
1665 if (S_ISDIR(inode->i_mode))
1666 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1667 else if (S_ISREG(inode->i_mode))
1668 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1669 else if (S_ISLNK(inode->i_mode))
1670 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1671 else if (S_ISBLK(inode->i_mode))
1672 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1673 else if (S_ISCHR(inode->i_mode))
1674 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1675 else if (S_ISFIFO(inode->i_mode))
1676 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1677 else if (S_ISSOCK(inode->i_mode))
1678 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1679
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001680 icbflags = iinfo->i_alloc_type |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001681 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1682 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1683 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1684 (le16_to_cpu(fe->icbTag.flags) &
1685 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1686 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687
1688 fe->icbTag.flags = cpu_to_le16(icbflags);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001689 if (sbi->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690 fe->descTag.descVersion = cpu_to_le16(3);
1691 else
1692 fe->descTag.descVersion = cpu_to_le16(2);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001693 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001694 fe->descTag.tagLocation = cpu_to_le32(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001695 iinfo->i_location.logicalBlockNum);
Jan Karaaae917c2010-01-08 16:46:29 +01001696 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 fe->descTag.descCRCLength = cpu_to_le16(crclen);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001698 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001699 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001700 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701
Jan Karaaae917c2010-01-08 16:46:29 +01001702out:
Jan Kara5833ded2010-01-08 16:52:59 +01001703 set_buffer_uptodate(bh);
Jan Karaaae917c2010-01-08 16:46:29 +01001704 unlock_buffer(bh);
1705
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 /* write the data blocks */
1707 mark_buffer_dirty(bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001708 if (do_sync) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 sync_dirty_buffer(bh);
Jan Karaaae917c2010-01-08 16:46:29 +01001710 if (buffer_write_io_error(bh)) {
Joe Perches78ace702011-10-10 01:08:05 -07001711 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1712 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 err = -EIO;
1714 }
1715 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001716 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001717
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 return err;
1719}
1720
Pekka Enberg97e961f2008-10-15 12:29:03 +02001721struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722{
1723 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1724 struct inode *inode = iget_locked(sb, block);
1725
1726 if (!inode)
1727 return NULL;
1728
1729 if (inode->i_state & I_NEW) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02001730 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 __udf_read_inode(inode);
1732 unlock_new_inode(inode);
1733 }
1734
1735 if (is_bad_inode(inode))
1736 goto out_iput;
1737
Pekka Enberg97e961f2008-10-15 12:29:03 +02001738 if (ino->logicalBlockNum >= UDF_SB(sb)->
1739 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 udf_debug("block=%d, partition=%d out of range\n",
Pekka Enberg97e961f2008-10-15 12:29:03 +02001741 ino->logicalBlockNum, ino->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 make_bad_inode(inode);
1743 goto out_iput;
1744 }
1745
1746 return inode;
1747
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001748 out_iput:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 iput(inode);
1750 return NULL;
1751}
1752
Jan Kara7e49b6f2010-10-22 00:30:26 +02001753int udf_add_aext(struct inode *inode, struct extent_position *epos,
1754 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755{
1756 int adsize;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001757 struct short_ad *sad = NULL;
1758 struct long_ad *lad = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759 struct allocExtDesc *aed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 uint8_t *ptr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001761 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762
Jan Karaff116fc2007-05-08 00:35:14 -07001763 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001764 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001765 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001766 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 else
Jan Karaff116fc2007-05-08 00:35:14 -07001768 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001770 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001771 adsize = sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001772 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001773 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 else
Jan Kara7e49b6f2010-10-22 00:30:26 +02001775 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001777 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
Al Viro391e8bb2010-01-31 21:28:48 -05001778 unsigned char *sptr, *dptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 struct buffer_head *nbh;
1780 int err, loffset;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001781 struct kernel_lb_addr obloc = epos->block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782
Marcin Slusarz4b111112008-02-08 04:20:36 -08001783 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1784 obloc.partitionReferenceNum,
1785 obloc.logicalBlockNum, &err);
1786 if (!epos->block.logicalBlockNum)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001787 return -ENOSPC;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001788 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
Pekka Enberg97e961f2008-10-15 12:29:03 +02001789 &epos->block,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001790 0));
1791 if (!nbh)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001792 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 lock_buffer(nbh);
1794 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1795 set_buffer_uptodate(nbh);
1796 unlock_buffer(nbh);
1797 mark_buffer_dirty_inode(nbh, inode);
1798
1799 aed = (struct allocExtDesc *)(nbh->b_data);
1800 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
Marcin Slusarz4b111112008-02-08 04:20:36 -08001801 aed->previousAllocExtLocation =
1802 cpu_to_le32(obloc.logicalBlockNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001803 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
Jan Karaff116fc2007-05-08 00:35:14 -07001804 loffset = epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 aed->lengthAllocDescs = cpu_to_le32(adsize);
1806 sptr = ptr - adsize;
1807 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1808 memcpy(dptr, sptr, adsize);
Jan Karaff116fc2007-05-08 00:35:14 -07001809 epos->offset = sizeof(struct allocExtDesc) + adsize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001810 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001811 loffset = epos->offset + adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 aed->lengthAllocDescs = cpu_to_le32(0);
1813 sptr = ptr;
Jan Karaff116fc2007-05-08 00:35:14 -07001814 epos->offset = sizeof(struct allocExtDesc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001816 if (epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001817 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001818 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001819 } else {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001820 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821 mark_inode_dirty(inode);
1822 }
1823 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001824 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001826 epos->block.logicalBlockNum, sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827 else
1828 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001829 epos->block.logicalBlockNum, sizeof(struct tag));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001830 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001831 case ICBTAG_FLAG_AD_SHORT:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001832 sad = (struct short_ad *)sptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001833 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1834 inode->i_sb->s_blocksize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001835 sad->extPosition =
1836 cpu_to_le32(epos->block.logicalBlockNum);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001837 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001838 case ICBTAG_FLAG_AD_LONG:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001839 lad = (struct long_ad *)sptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001840 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1841 inode->i_sb->s_blocksize);
1842 lad->extLocation = cpu_to_lelb(epos->block);
1843 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1844 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001846 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001847 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001848 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Jan Karaff116fc2007-05-08 00:35:14 -07001849 udf_update_tag(epos->bh->b_data, loffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001851 udf_update_tag(epos->bh->b_data,
1852 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001853 mark_buffer_dirty_inode(epos->bh, inode);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001854 brelse(epos->bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001855 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001857 }
Jan Karaff116fc2007-05-08 00:35:14 -07001858 epos->bh = nbh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 }
1860
Jan Kara7e49b6f2010-10-22 00:30:26 +02001861 udf_write_aext(inode, epos, eloc, elen, inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001863 if (!epos->bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001864 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001866 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001867 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001868 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001869 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1870 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1871 udf_update_tag(epos->bh->b_data,
1872 epos->offset + (inc ? 0 : adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001874 udf_update_tag(epos->bh->b_data,
1875 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001876 mark_buffer_dirty_inode(epos->bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 }
1878
Jan Kara7e49b6f2010-10-22 00:30:26 +02001879 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880}
1881
Jan Kara7e49b6f2010-10-22 00:30:26 +02001882void udf_write_aext(struct inode *inode, struct extent_position *epos,
1883 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884{
1885 int adsize;
1886 uint8_t *ptr;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001887 struct short_ad *sad;
1888 struct long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001889 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890
Jan Karaff116fc2007-05-08 00:35:14 -07001891 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001892 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001893 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001894 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 else
Jan Karaff116fc2007-05-08 00:35:14 -07001896 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001898 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001899 case ICBTAG_FLAG_AD_SHORT:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001900 sad = (struct short_ad *)ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001901 sad->extLength = cpu_to_le32(elen);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001902 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001903 adsize = sizeof(struct short_ad);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001904 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001905 case ICBTAG_FLAG_AD_LONG:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001906 lad = (struct long_ad *)ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001907 lad->extLength = cpu_to_le32(elen);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001908 lad->extLocation = cpu_to_lelb(*eloc);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001909 memset(lad->impUse, 0x00, sizeof(lad->impUse));
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001910 adsize = sizeof(struct long_ad);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001911 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001912 default:
Jan Kara7e49b6f2010-10-22 00:30:26 +02001913 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 }
1915
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001916 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001917 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001918 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001919 struct allocExtDesc *aed =
1920 (struct allocExtDesc *)epos->bh->b_data;
Jan Karaff116fc2007-05-08 00:35:14 -07001921 udf_update_tag(epos->bh->b_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001922 le32_to_cpu(aed->lengthAllocDescs) +
1923 sizeof(struct allocExtDesc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 }
Jan Karaff116fc2007-05-08 00:35:14 -07001925 mark_buffer_dirty_inode(epos->bh, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001926 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001928 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929
1930 if (inc)
Jan Karaff116fc2007-05-08 00:35:14 -07001931 epos->offset += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932}
1933
Marcin Slusarz4b111112008-02-08 04:20:36 -08001934int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001935 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936{
1937 int8_t etype;
1938
Jan Karaff116fc2007-05-08 00:35:14 -07001939 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001940 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001941 int block;
Jan Karaff116fc2007-05-08 00:35:14 -07001942 epos->block = *eloc;
1943 epos->offset = sizeof(struct allocExtDesc);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001944 brelse(epos->bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001945 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001946 epos->bh = udf_tread(inode->i_sb, block);
1947 if (!epos->bh) {
1948 udf_debug("reading block %d failed!\n", block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 return -1;
1950 }
1951 }
1952
1953 return etype;
1954}
1955
Marcin Slusarz4b111112008-02-08 04:20:36 -08001956int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001957 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958{
1959 int alen;
1960 int8_t etype;
1961 uint8_t *ptr;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001962 struct short_ad *sad;
1963 struct long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001964 struct udf_inode_info *iinfo = UDF_I(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001965
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001966 if (!epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001967 if (!epos->offset)
1968 epos->offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001969 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001970 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001971 iinfo->i_lenEAttr;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001972 alen = udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001973 iinfo->i_lenAlloc;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001974 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001975 if (!epos->offset)
1976 epos->offset = sizeof(struct allocExtDesc);
1977 ptr = epos->bh->b_data + epos->offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001978 alen = sizeof(struct allocExtDesc) +
Marcin Slusarz4b111112008-02-08 04:20:36 -08001979 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
1980 lengthAllocDescs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 }
1982
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001983 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001984 case ICBTAG_FLAG_AD_SHORT:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001985 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
1986 if (!sad)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 return -1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001988 etype = le32_to_cpu(sad->extLength) >> 30;
1989 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001990 eloc->partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001991 iinfo->i_location.partitionReferenceNum;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001992 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
1993 break;
1994 case ICBTAG_FLAG_AD_LONG:
Marcin Slusarz4b111112008-02-08 04:20:36 -08001995 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
1996 if (!lad)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001997 return -1;
1998 etype = le32_to_cpu(lad->extLength) >> 30;
1999 *eloc = lelb_to_cpu(lad->extLocation);
2000 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2001 break;
2002 default:
Joe Perchesa983f362011-10-10 01:08:07 -07002003 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002004 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 }
2006
2007 return etype;
2008}
2009
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002010static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002011 struct kernel_lb_addr neloc, uint32_t nelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002013 struct kernel_lb_addr oeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002014 uint32_t oelen;
2015 int8_t etype;
2016
Jan Karaff116fc2007-05-08 00:35:14 -07002017 if (epos.bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07002018 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002020 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002021 udf_write_aext(inode, &epos, &neloc, nelen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022 neloc = oeloc;
2023 nelen = (etype << 30) | oelen;
2024 }
Pekka Enberg97e961f2008-10-15 12:29:03 +02002025 udf_add_aext(inode, &epos, &neloc, nelen, 1);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002026 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002027
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028 return (nelen >> 30);
2029}
2030
Marcin Slusarz4b111112008-02-08 04:20:36 -08002031int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002032 struct kernel_lb_addr eloc, uint32_t elen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033{
Jan Karaff116fc2007-05-08 00:35:14 -07002034 struct extent_position oepos;
2035 int adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 int8_t etype;
2037 struct allocExtDesc *aed;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002038 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002040 if (epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002041 get_bh(epos.bh);
2042 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043 }
2044
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002045 iinfo = UDF_I(inode);
2046 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002047 adsize = sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002048 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002049 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 else
2051 adsize = 0;
2052
Jan Karaff116fc2007-05-08 00:35:14 -07002053 oepos = epos;
2054 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055 return -1;
2056
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002057 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002058 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002059 if (oepos.bh != epos.bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07002060 oepos.block = epos.block;
Jan Kara3bf25cb2007-05-08 00:35:16 -07002061 brelse(oepos.bh);
2062 get_bh(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -07002063 oepos.bh = epos.bh;
2064 oepos.offset = epos.offset - adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 }
2066 }
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002067 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068 elen = 0;
2069
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002070 if (epos.bh != oepos.bh) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002071 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2072 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2073 udf_write_aext(inode, &oepos, &eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002074 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002075 iinfo->i_lenAlloc -= (adsize * 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002077 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002078 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01002079 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002080 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002081 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08002082 udf_update_tag(oepos.bh->b_data,
2083 oepos.offset - (2 * adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08002085 udf_update_tag(oepos.bh->b_data,
2086 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07002087 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002089 } else {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002090 udf_write_aext(inode, &oepos, &eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002091 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002092 iinfo->i_lenAlloc -= adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002094 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002095 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01002096 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002097 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002098 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08002099 udf_update_tag(oepos.bh->b_data,
2100 epos.offset - adsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08002102 udf_update_tag(oepos.bh->b_data,
2103 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07002104 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 }
2106 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07002107
Jan Kara3bf25cb2007-05-08 00:35:16 -07002108 brelse(epos.bh);
2109 brelse(oepos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002110
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 return (elen >> 30);
2112}
2113
Marcin Slusarz4b111112008-02-08 04:20:36 -08002114int8_t inode_bmap(struct inode *inode, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002115 struct extent_position *pos, struct kernel_lb_addr *eloc,
Marcin Slusarz4b111112008-02-08 04:20:36 -08002116 uint32_t *elen, sector_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117{
Marcin Slusarz4b111112008-02-08 04:20:36 -08002118 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002119 loff_t lbcount = 0, bcount =
Marcin Slusarz4b111112008-02-08 04:20:36 -08002120 (loff_t) block << blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002122 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002124 iinfo = UDF_I(inode);
Jan Karaff116fc2007-05-08 00:35:14 -07002125 pos->offset = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002126 pos->block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002127 pos->bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 *elen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002130 do {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002131 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2132 if (etype == -1) {
2133 *offset = (bcount - lbcount) >> blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002134 iinfo->i_lenExtents = lbcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 return -1;
2136 }
2137 lbcount += *elen;
2138 } while (lbcount <= bcount);
2139
Marcin Slusarz4b111112008-02-08 04:20:36 -08002140 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141
2142 return etype;
2143}
2144
Jan Kara60448b12007-05-08 00:35:13 -07002145long udf_block_map(struct inode *inode, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002146{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002147 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -07002148 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -07002149 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002150 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 int ret;
2152
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01002153 down_read(&UDF_I(inode)->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154
Marcin Slusarz4b111112008-02-08 04:20:36 -08002155 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2156 (EXT_RECORDED_ALLOCATED >> 30))
Pekka Enberg97e961f2008-10-15 12:29:03 +02002157 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 else
2159 ret = 0;
2160
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01002161 up_read(&UDF_I(inode)->i_data_sem);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002162 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163
2164 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2165 return udf_fixed_to_variable(ret);
2166 else
2167 return ret;
2168}