blob: 236cd48184c2df20e75bc9fee098ded782f2560f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * inode.c
3 *
4 * PURPOSE
5 * Inode handling routines for the OSTA-UDF(tm) filesystem.
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * COPYRIGHT
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
12 *
13 * (C) 1998 Dave Boynton
14 * (C) 1998-2004 Ben Fennema
15 * (C) 1999-2000 Stelias Computing Inc
16 *
17 * HISTORY
18 *
19 * 10/04/98 dgb Added rudimentary directory functions
20 * 10/07/98 Fully working udf_block_map! It works!
21 * 11/25/98 bmap altered to better support extents
Marcin Slusarz4b111112008-02-08 04:20:36 -080022 * 12/06/98 blf partition support in udf_iget, udf_block_map
23 * and udf_read_inode
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * 12/12/98 rewrote udf_block_map to handle next extents and descs across
25 * block boundaries (which is not actually allowed)
26 * 12/20/98 added support for strategy 4096
27 * 03/07/99 rewrote udf_block_map (again)
28 * New funcs, inode_bmap, udf_next_aext
29 * 04/19/99 Support for writing device EA's for major/minor #
30 */
31
32#include "udfdecl.h"
33#include <linux/mm.h>
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>
Kent Overstreeta27bb332013-05-07 16:19:08 -070041#include <linux/aio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43#include "udf_i.h"
44#include "udf_sb.h"
45
46MODULE_AUTHOR("Ben Fennema");
47MODULE_DESCRIPTION("Universal Disk Format Filesystem");
48MODULE_LICENSE("GPL");
49
50#define EXTENT_MERGE_SIZE 5
51
Al Virofaa17292011-07-26 03:18:29 -040052static umode_t udf_convert_permissions(struct fileEntry *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053static int udf_update_inode(struct inode *, int);
54static void udf_fill_inode(struct inode *, struct buffer_head *);
Jan Kara49521de2010-10-20 17:42:44 +020055static int udf_sync_inode(struct inode *inode);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -070056static int udf_alloc_i_data(struct inode *inode, size_t size);
Jan Kara7b0b0932011-12-10 01:43:33 +010057static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
Jan Karaff116fc2007-05-08 00:35:14 -070058static int8_t udf_insert_aext(struct inode *, struct extent_position,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020059 struct kernel_lb_addr, uint32_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static void udf_split_extents(struct inode *, int *, int, int,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020061 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062static void udf_prealloc_extents(struct inode *, int, int,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020063 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064static void udf_merge_extents(struct inode *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020065 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066static void udf_update_extents(struct inode *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020067 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070068 struct extent_position *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
70
Namjae Jeon99600052013-01-19 11:17:14 +090071static void __udf_clear_extent_cache(struct inode *inode)
72{
73 struct udf_inode_info *iinfo = UDF_I(inode);
74
75 if (iinfo->cached_extent.lstart != -1) {
76 brelse(iinfo->cached_extent.epos.bh);
77 iinfo->cached_extent.lstart = -1;
78 }
79}
80
81/* Invalidate extent cache */
82static void udf_clear_extent_cache(struct inode *inode)
83{
84 struct udf_inode_info *iinfo = UDF_I(inode);
85
86 spin_lock(&iinfo->i_extent_cache_lock);
87 __udf_clear_extent_cache(inode);
88 spin_unlock(&iinfo->i_extent_cache_lock);
89}
90
91/* Return contents of extent cache */
92static int udf_read_extent_cache(struct inode *inode, loff_t bcount,
93 loff_t *lbcount, struct extent_position *pos)
94{
95 struct udf_inode_info *iinfo = UDF_I(inode);
96 int ret = 0;
97
98 spin_lock(&iinfo->i_extent_cache_lock);
99 if ((iinfo->cached_extent.lstart <= bcount) &&
100 (iinfo->cached_extent.lstart != -1)) {
101 /* Cache hit */
102 *lbcount = iinfo->cached_extent.lstart;
103 memcpy(pos, &iinfo->cached_extent.epos,
104 sizeof(struct extent_position));
105 if (pos->bh)
106 get_bh(pos->bh);
107 ret = 1;
108 }
109 spin_unlock(&iinfo->i_extent_cache_lock);
110 return ret;
111}
112
113/* Add extent to extent cache */
114static void udf_update_extent_cache(struct inode *inode, loff_t estart,
115 struct extent_position *pos, int next_epos)
116{
117 struct udf_inode_info *iinfo = UDF_I(inode);
118
119 spin_lock(&iinfo->i_extent_cache_lock);
120 /* Invalidate previously cached extent */
121 __udf_clear_extent_cache(inode);
122 if (pos->bh)
123 get_bh(pos->bh);
124 memcpy(&iinfo->cached_extent.epos, pos,
125 sizeof(struct extent_position));
126 iinfo->cached_extent.lstart = estart;
127 if (next_epos)
128 switch (iinfo->i_alloc_type) {
129 case ICBTAG_FLAG_AD_SHORT:
130 iinfo->cached_extent.epos.offset -=
131 sizeof(struct short_ad);
132 break;
133 case ICBTAG_FLAG_AD_LONG:
134 iinfo->cached_extent.epos.offset -=
135 sizeof(struct long_ad);
136 }
137 spin_unlock(&iinfo->i_extent_cache_lock);
138}
Christoph Hellwigb1e32122008-02-22 12:38:48 +0100139
Al Viro3aac2b62010-06-07 00:43:39 -0400140void udf_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141{
Jan Kara2c948b32009-12-03 13:39:28 +0100142 struct udf_inode_info *iinfo = UDF_I(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400143 int want_delete = 0;
Jan Kara2c948b32009-12-03 13:39:28 +0100144
Al Viro3aac2b62010-06-07 00:43:39 -0400145 if (!inode->i_nlink && !is_bad_inode(inode)) {
146 want_delete = 1;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200147 udf_setsize(inode, 0);
Al Viro3aac2b62010-06-07 00:43:39 -0400148 udf_update_inode(inode, IS_SYNC(inode));
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700149 }
150 truncate_inode_pages_final(&inode->i_data);
Al Viro3aac2b62010-06-07 00:43:39 -0400151 invalidate_inode_buffers(inode);
Jan Karadbd57682012-05-03 14:48:02 +0200152 clear_inode(inode);
Jan Kara2c948b32009-12-03 13:39:28 +0100153 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
154 inode->i_size != iinfo->i_lenExtents) {
Joe Perches78ace702011-10-10 01:08:05 -0700155 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",
156 inode->i_ino, inode->i_mode,
157 (unsigned long long)inode->i_size,
158 (unsigned long long)iinfo->i_lenExtents);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800160 kfree(iinfo->i_ext.i_data);
161 iinfo->i_ext.i_data = NULL;
Namjae Jeon99600052013-01-19 11:17:14 +0900162 udf_clear_extent_cache(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400163 if (want_delete) {
Al Viro3aac2b62010-06-07 00:43:39 -0400164 udf_free_inode(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400165 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166}
167
Ian Abbott5eec54f2012-09-05 17:44:31 +0100168static void udf_write_failed(struct address_space *mapping, loff_t to)
169{
170 struct inode *inode = mapping->host;
171 struct udf_inode_info *iinfo = UDF_I(inode);
172 loff_t isize = inode->i_size;
173
174 if (to > isize) {
Kirill A. Shutemov7caef262013-09-12 15:13:56 -0700175 truncate_pagecache(inode, isize);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100176 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
177 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +0900178 udf_clear_extent_cache(inode);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100179 udf_truncate_extents(inode);
180 up_write(&iinfo->i_data_sem);
181 }
182 }
183}
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185static int udf_writepage(struct page *page, struct writeback_control *wbc)
186{
187 return block_write_full_page(page, udf_get_block, wbc);
188}
189
Namjae Jeon378b8e12012-08-31 12:49:07 -0400190static int udf_writepages(struct address_space *mapping,
191 struct writeback_control *wbc)
192{
193 return mpage_writepages(mapping, wbc, udf_get_block);
194}
195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196static int udf_readpage(struct file *file, struct page *page)
197{
Namjae Jeonbc112322011-10-03 14:02:59 +0900198 return mpage_readpage(page, udf_get_block);
199}
200
201static int udf_readpages(struct file *file, struct address_space *mapping,
202 struct list_head *pages, unsigned nr_pages)
203{
204 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205}
206
Nick Pigginbe021ee2007-10-16 01:25:20 -0700207static int udf_write_begin(struct file *file, struct address_space *mapping,
208 loff_t pos, unsigned len, unsigned flags,
209 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
Christoph Hellwig155130a2010-06-04 11:29:58 +0200211 int ret;
212
213 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100214 if (unlikely(ret))
215 udf_write_failed(mapping, pos + len);
216 return ret;
217}
Jan Kara7e49b6f2010-10-22 00:30:26 +0200218
Ian Abbott5eec54f2012-09-05 17:44:31 +0100219static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
Al Virod8d3d942014-03-04 21:27:34 -0500220 struct iov_iter *iter,
221 loff_t offset)
Ian Abbott5eec54f2012-09-05 17:44:31 +0100222{
223 struct file *file = iocb->ki_filp;
224 struct address_space *mapping = file->f_mapping;
225 struct inode *inode = mapping->host;
Al Viroa6cbcd42014-03-04 22:38:00 -0500226 size_t count = iov_iter_count(iter);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100227 ssize_t ret;
Christoph Hellwig155130a2010-06-04 11:29:58 +0200228
Al Viro31b14032014-03-05 01:33:16 -0500229 ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, udf_get_block);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100230 if (unlikely(ret < 0 && (rw & WRITE)))
Al Viroa6cbcd42014-03-04 22:38:00 -0500231 udf_write_failed(mapping, offset + count);
Christoph Hellwig155130a2010-06-04 11:29:58 +0200232 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233}
234
235static sector_t udf_bmap(struct address_space *mapping, sector_t block)
236{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700237 return generic_block_bmap(mapping, block, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700240const struct address_space_operations udf_aops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700241 .readpage = udf_readpage,
Namjae Jeonbc112322011-10-03 14:02:59 +0900242 .readpages = udf_readpages,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700243 .writepage = udf_writepage,
Namjae Jeon378b8e12012-08-31 12:49:07 -0400244 .writepages = udf_writepages,
Ian Abbott5eec54f2012-09-05 17:44:31 +0100245 .write_begin = udf_write_begin,
246 .write_end = generic_write_end,
247 .direct_IO = udf_direct_IO,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700248 .bmap = udf_bmap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249};
250
Jan Karad2eb8c32011-12-10 02:30:48 +0100251/*
252 * Expand file stored in ICB to a normal one-block-file
253 *
254 * This function requires i_data_sem for writing and releases it.
255 * This function requires i_mutex held
256 */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200257int udf_expand_file_adinicb(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258{
259 struct page *page;
260 char *kaddr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800261 struct udf_inode_info *iinfo = UDF_I(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200262 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 struct writeback_control udf_wbc = {
264 .sync_mode = WB_SYNC_NONE,
265 .nr_to_write = 1,
266 };
267
Jan Kara09ebb172014-02-18 12:00:21 +0100268 WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800269 if (!iinfo->i_lenAlloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800271 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800273 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200274 /* from now on we have normal address_space methods */
275 inode->i_data.a_ops = &udf_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100276 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200278 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 }
Jan Karad2eb8c32011-12-10 02:30:48 +0100280 /*
281 * Release i_data_sem so that we can lock a page - page lock ranks
282 * above i_data_sem. i_mutex still protects us against file changes.
283 */
284 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Jan Kara7e49b6f2010-10-22 00:30:26 +0200286 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
287 if (!page)
288 return -ENOMEM;
Matt Mackallcd7619d2005-05-01 08:59:01 -0700289
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700290 if (!PageUptodate(page)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 kaddr = kmap(page);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800292 memset(kaddr + iinfo->i_lenAlloc, 0x00,
293 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
294 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
295 iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 flush_dcache_page(page);
297 SetPageUptodate(page);
298 kunmap(page);
299 }
Jan Karad2eb8c32011-12-10 02:30:48 +0100300 down_write(&iinfo->i_data_sem);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800301 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
302 iinfo->i_lenAlloc);
303 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800305 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800307 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200308 /* from now on we have normal address_space methods */
309 inode->i_data.a_ops = &udf_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100310 up_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200311 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
312 if (err) {
313 /* Restore everything back so that we don't lose data... */
314 lock_page(page);
315 kaddr = kmap(page);
Jan Karad2eb8c32011-12-10 02:30:48 +0100316 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200317 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
318 inode->i_size);
319 kunmap(page);
320 unlock_page(page);
321 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
322 inode->i_data.a_ops = &udf_adinicb_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100323 up_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200324 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 page_cache_release(page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200327
328 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329}
330
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700331struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
332 int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
334 int newblock;
Jan Karaff116fc2007-05-08 00:35:14 -0700335 struct buffer_head *dbh = NULL;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200336 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 uint8_t alloctype;
Jan Karaff116fc2007-05-08 00:35:14 -0700338 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 struct udf_fileident_bh sfibh, dfibh;
Jan Karaaf793292008-02-08 04:20:50 -0800341 loff_t f_pos = udf_ext0_offset(inode);
342 int size = udf_ext0_offset(inode) + inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 struct fileIdentDesc cfi, *sfi, *dfi;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800344 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
347 alloctype = ICBTAG_FLAG_AD_SHORT;
348 else
349 alloctype = ICBTAG_FLAG_AD_LONG;
350
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700351 if (!inode->i_size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800352 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 mark_inode_dirty(inode);
354 return NULL;
355 }
356
357 /* alloc block, and copy data to it */
358 *block = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800359 iinfo->i_location.partitionReferenceNum,
360 iinfo->i_location.logicalBlockNum, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 if (!(*block))
362 return NULL;
363 newblock = udf_get_pblock(inode->i_sb, *block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800364 iinfo->i_location.partitionReferenceNum,
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800365 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 if (!newblock)
367 return NULL;
368 dbh = udf_tgetblk(inode->i_sb, newblock);
369 if (!dbh)
370 return NULL;
371 lock_buffer(dbh);
372 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
373 set_buffer_uptodate(dbh);
374 unlock_buffer(dbh);
375 mark_buffer_dirty_inode(dbh, inode);
376
Marcin Slusarz4b111112008-02-08 04:20:36 -0800377 sfibh.soffset = sfibh.eoffset =
Jan Karaaf793292008-02-08 04:20:50 -0800378 f_pos & (inode->i_sb->s_blocksize - 1);
Jan Karaff116fc2007-05-08 00:35:14 -0700379 sfibh.sbh = sfibh.ebh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 dfibh.soffset = dfibh.eoffset = 0;
381 dfibh.sbh = dfibh.ebh = dbh;
Jan Karaaf793292008-02-08 04:20:50 -0800382 while (f_pos < size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800383 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800384 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
385 NULL, NULL, NULL);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700386 if (!sfi) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700387 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 return NULL;
389 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800390 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 sfi->descTag.tagLocation = cpu_to_le32(*block);
392 dfibh.soffset = dfibh.eoffset;
393 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
394 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
395 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800396 sfi->fileIdent +
397 le16_to_cpu(sfi->lengthOfImpUse))) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800398 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700399 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 return NULL;
401 }
402 }
403 mark_buffer_dirty_inode(dbh, inode);
404
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800405 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
406 iinfo->i_lenAlloc);
407 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 eloc.logicalBlockNum = *block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800409 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800410 iinfo->i_location.partitionReferenceNum;
Jan Kara2c948b32009-12-03 13:39:28 +0100411 iinfo->i_lenExtents = inode->i_size;
Jan Karaff116fc2007-05-08 00:35:14 -0700412 epos.bh = NULL;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800413 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700414 epos.offset = udf_file_entry_alloc_offset(inode);
Jan Kara2c948b32009-12-03 13:39:28 +0100415 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 /* UniqueID stuff */
417
Jan Kara3bf25cb2007-05-08 00:35:16 -0700418 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 mark_inode_dirty(inode);
420 return dbh;
421}
422
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700423static int udf_get_block(struct inode *inode, sector_t block,
424 struct buffer_head *bh_result, int create)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425{
426 int err, new;
Marcin Slusarz1ed16172008-02-08 04:20:48 -0800427 sector_t phys = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800428 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700430 if (!create) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 phys = udf_block_map(inode, block);
432 if (phys)
433 map_bh(bh_result, inode->i_sb, phys);
434 return 0;
435 }
436
437 err = -EIO;
438 new = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800439 iinfo = UDF_I(inode);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100440
441 down_write(&iinfo->i_data_sem);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800442 if (block == iinfo->i_next_alloc_block + 1) {
443 iinfo->i_next_alloc_block++;
444 iinfo->i_next_alloc_goal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 }
446
Namjae Jeon99600052013-01-19 11:17:14 +0900447 udf_clear_extent_cache(inode);
Jan Kara7b0b0932011-12-10 01:43:33 +0100448 phys = inode_getblk(inode, block, &err, &new);
449 if (!phys)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 goto abort;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 if (new)
453 set_buffer_new(bh_result);
454 map_bh(bh_result, inode->i_sb, phys);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700455
456abort:
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100457 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459}
460
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700461static struct buffer_head *udf_getblk(struct inode *inode, long block,
462 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463{
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700464 struct buffer_head *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 struct buffer_head dummy;
466
467 dummy.b_state = 0;
468 dummy.b_blocknr = -1000;
469 *err = udf_get_block(inode, block, &dummy, create);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700470 if (!*err && buffer_mapped(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700472 if (buffer_new(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 lock_buffer(bh);
474 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
475 set_buffer_uptodate(bh);
476 unlock_buffer(bh);
477 mark_buffer_dirty_inode(bh, inode);
478 }
479 return bh;
480 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700481
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 return NULL;
483}
484
Jan Kara31170b62007-05-08 00:35:21 -0700485/* Extend the file by 'blocks' blocks, return the number of extents added */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200486static int udf_do_extend_file(struct inode *inode,
487 struct extent_position *last_pos,
488 struct kernel_long_ad *last_ext,
489 sector_t blocks)
Jan Kara31170b62007-05-08 00:35:21 -0700490{
491 sector_t add;
492 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
493 struct super_block *sb = inode->i_sb;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200494 struct kernel_lb_addr prealloc_loc = {};
Jan Kara31170b62007-05-08 00:35:21 -0700495 int prealloc_len = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800496 struct udf_inode_info *iinfo;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200497 int err;
Jan Kara31170b62007-05-08 00:35:21 -0700498
499 /* The previous extent is fake and we should not extend by anything
500 * - there's nothing to do... */
501 if (!blocks && fake)
502 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700503
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800504 iinfo = UDF_I(inode);
Jan Kara31170b62007-05-08 00:35:21 -0700505 /* Round the last extent up to a multiple of block size */
506 if (last_ext->extLength & (sb->s_blocksize - 1)) {
507 last_ext->extLength =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700508 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
509 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
510 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800511 iinfo->i_lenExtents =
512 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700513 ~(sb->s_blocksize - 1);
Jan Kara31170b62007-05-08 00:35:21 -0700514 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700515
Jan Kara31170b62007-05-08 00:35:21 -0700516 /* Last extent are just preallocated blocks? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800517 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
518 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700519 /* Save the extent so that we can reattach it to the end */
520 prealloc_loc = last_ext->extLocation;
521 prealloc_len = last_ext->extLength;
522 /* Mark the extent as a hole */
523 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700524 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
Jan Kara31170b62007-05-08 00:35:21 -0700525 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800526 last_ext->extLocation.partitionReferenceNum = 0;
Jan Kara31170b62007-05-08 00:35:21 -0700527 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700528
Jan Kara31170b62007-05-08 00:35:21 -0700529 /* Can we merge with the previous extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800530 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
531 EXT_NOT_RECORDED_NOT_ALLOCATED) {
532 add = ((1 << 30) - sb->s_blocksize -
533 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
534 sb->s_blocksize_bits;
Jan Kara31170b62007-05-08 00:35:21 -0700535 if (add > blocks)
536 add = blocks;
537 blocks -= add;
538 last_ext->extLength += add << sb->s_blocksize_bits;
539 }
540
541 if (fake) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200542 udf_add_aext(inode, last_pos, &last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700543 last_ext->extLength, 1);
Jan Kara31170b62007-05-08 00:35:21 -0700544 count++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800545 } else
Pekka Enberg97e961f2008-10-15 12:29:03 +0200546 udf_write_aext(inode, last_pos, &last_ext->extLocation,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800547 last_ext->extLength, 1);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700548
Jan Kara31170b62007-05-08 00:35:21 -0700549 /* Managed to do everything necessary? */
550 if (!blocks)
551 goto out;
552
553 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
554 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800555 last_ext->extLocation.partitionReferenceNum = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700556 add = (1 << (30-sb->s_blocksize_bits)) - 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800557 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
558 (add << sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700559
Jan Kara31170b62007-05-08 00:35:21 -0700560 /* Create enough extents to cover the whole hole */
561 while (blocks > add) {
562 blocks -= add;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200563 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
564 last_ext->extLength, 1);
565 if (err)
566 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700567 count++;
568 }
569 if (blocks) {
570 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700571 (blocks << sb->s_blocksize_bits);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200572 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
573 last_ext->extLength, 1);
574 if (err)
575 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700576 count++;
577 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700578
579out:
Jan Kara31170b62007-05-08 00:35:21 -0700580 /* Do we have some preallocated blocks saved? */
581 if (prealloc_len) {
Jan Kara7e49b6f2010-10-22 00:30:26 +0200582 err = udf_add_aext(inode, last_pos, &prealloc_loc,
583 prealloc_len, 1);
584 if (err)
585 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700586 last_ext->extLocation = prealloc_loc;
587 last_ext->extLength = prealloc_len;
588 count++;
589 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700590
Jan Kara31170b62007-05-08 00:35:21 -0700591 /* last_pos should point to the last written extent... */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800592 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200593 last_pos->offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800594 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200595 last_pos->offset -= sizeof(struct long_ad);
Jan Kara31170b62007-05-08 00:35:21 -0700596 else
Jan Kara7e49b6f2010-10-22 00:30:26 +0200597 return -EIO;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700598
Jan Kara31170b62007-05-08 00:35:21 -0700599 return count;
600}
601
Jan Kara7e49b6f2010-10-22 00:30:26 +0200602static int udf_extend_file(struct inode *inode, loff_t newsize)
603{
604
605 struct extent_position epos;
606 struct kernel_lb_addr eloc;
607 uint32_t elen;
608 int8_t etype;
609 struct super_block *sb = inode->i_sb;
610 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
611 int adsize;
612 struct udf_inode_info *iinfo = UDF_I(inode);
613 struct kernel_long_ad extent;
614 int err;
615
616 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
617 adsize = sizeof(struct short_ad);
618 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
619 adsize = sizeof(struct long_ad);
620 else
621 BUG();
622
623 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
624
625 /* File has extent covering the new size (could happen when extending
626 * inside a block)? */
627 if (etype != -1)
628 return 0;
629 if (newsize & (sb->s_blocksize - 1))
630 offset++;
631 /* Extended file just to the boundary of the last file block? */
632 if (offset == 0)
633 return 0;
634
635 /* Truncate is extending the file by 'offset' blocks */
636 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
637 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
638 /* File has no extents at all or has empty last
639 * indirect extent! Create a fake extent... */
640 extent.extLocation.logicalBlockNum = 0;
641 extent.extLocation.partitionReferenceNum = 0;
642 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
643 } else {
644 epos.offset -= adsize;
645 etype = udf_next_aext(inode, &epos, &extent.extLocation,
646 &extent.extLength, 0);
647 extent.extLength |= etype << 30;
648 }
649 err = udf_do_extend_file(inode, &epos, &extent, offset);
650 if (err < 0)
651 goto out;
652 err = 0;
653 iinfo->i_lenExtents = newsize;
654out:
655 brelse(epos.bh);
656 return err;
657}
658
Jan Kara7b0b0932011-12-10 01:43:33 +0100659static sector_t inode_getblk(struct inode *inode, sector_t block,
660 int *err, int *new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200662 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
Jan Karaff116fc2007-05-08 00:35:14 -0700663 struct extent_position prev_epos, cur_epos, next_epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 int count = 0, startnum = 0, endnum = 0;
Jan Kara85d71242007-06-01 00:46:29 -0700665 uint32_t elen = 0, tmpelen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200666 struct kernel_lb_addr eloc, tmpeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 int c = 1;
Jan Kara60448b12007-05-08 00:35:13 -0700668 loff_t lbcount = 0, b_off = 0;
669 uint32_t newblocknum, newblock;
670 sector_t offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800672 struct udf_inode_info *iinfo = UDF_I(inode);
673 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
Jan Kara31170b62007-05-08 00:35:21 -0700674 int lastblock = 0;
Namjae Jeonfb719c52012-10-10 00:09:12 +0900675 bool isBeyondEOF;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
Jan Kara7b0b0932011-12-10 01:43:33 +0100677 *err = 0;
678 *new = 0;
Jan Karaff116fc2007-05-08 00:35:14 -0700679 prev_epos.offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800680 prev_epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700681 prev_epos.bh = NULL;
682 cur_epos = next_epos = prev_epos;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700683 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
685 /* find the extent which contains the block we are looking for.
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700686 alternate between laarr[0] and laarr[1] for locations of the
687 current extent, and the previous extent */
688 do {
689 if (prev_epos.bh != cur_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700690 brelse(prev_epos.bh);
691 get_bh(cur_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700692 prev_epos.bh = cur_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700694 if (cur_epos.bh != next_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700695 brelse(cur_epos.bh);
696 get_bh(next_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700697 cur_epos.bh = next_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 }
699
700 lbcount += elen;
701
Jan Karaff116fc2007-05-08 00:35:14 -0700702 prev_epos.block = cur_epos.block;
703 cur_epos.block = next_epos.block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Jan Karaff116fc2007-05-08 00:35:14 -0700705 prev_epos.offset = cur_epos.offset;
706 cur_epos.offset = next_epos.offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Marcin Slusarz4b111112008-02-08 04:20:36 -0800708 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
709 if (etype == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 break;
711
712 c = !c;
713
714 laarr[c].extLength = (etype << 30) | elen;
715 laarr[c].extLocation = eloc;
716
717 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
718 pgoal = eloc.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700719 ((elen + inode->i_sb->s_blocksize - 1) >>
720 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700722 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 } while (lbcount + elen <= b_off);
724
725 b_off -= lbcount;
726 offset = b_off >> inode->i_sb->s_blocksize_bits;
Jan Kara85d71242007-06-01 00:46:29 -0700727 /*
728 * Move prev_epos and cur_epos into indirect extent if we are at
729 * the pointer to it
730 */
731 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
732 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
734 /* if the extent is allocated and recorded, return the block
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700735 if the extent is not a multiple of the blocksize, round up */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700737 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
738 if (elen & (inode->i_sb->s_blocksize - 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 elen = EXT_RECORDED_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700740 ((elen + inode->i_sb->s_blocksize - 1) &
741 ~(inode->i_sb->s_blocksize - 1));
Jan Kara7e49b6f2010-10-22 00:30:26 +0200742 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 }
Jan Kara3bf25cb2007-05-08 00:35:16 -0700744 brelse(prev_epos.bh);
745 brelse(cur_epos.bh);
746 brelse(next_epos.bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200747 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
Jan Kara7b0b0932011-12-10 01:43:33 +0100748 return newblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 }
750
Jan Kara31170b62007-05-08 00:35:21 -0700751 /* Are we beyond EOF? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700752 if (etype == -1) {
Jan Kara31170b62007-05-08 00:35:21 -0700753 int ret;
Namjae Jeonfb719c52012-10-10 00:09:12 +0900754 isBeyondEOF = 1;
Jan Kara31170b62007-05-08 00:35:21 -0700755 if (count) {
756 if (c)
757 laarr[0] = laarr[1];
758 startnum = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700759 } else {
Jan Kara31170b62007-05-08 00:35:21 -0700760 /* Create a fake extent when there's not one */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800761 memset(&laarr[0].extLocation, 0x00,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200762 sizeof(struct kernel_lb_addr));
Jan Kara31170b62007-05-08 00:35:21 -0700763 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200764 /* Will udf_do_extend_file() create real extent from
Marcin Slusarz4b111112008-02-08 04:20:36 -0800765 a fake one? */
Jan Kara31170b62007-05-08 00:35:21 -0700766 startnum = (offset > 0);
767 }
768 /* Create extents for the hole between EOF and offset */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200769 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
770 if (ret < 0) {
Jan Kara31170b62007-05-08 00:35:21 -0700771 brelse(prev_epos.bh);
772 brelse(cur_epos.bh);
773 brelse(next_epos.bh);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200774 *err = ret;
Jan Kara7b0b0932011-12-10 01:43:33 +0100775 return 0;
Jan Kara31170b62007-05-08 00:35:21 -0700776 }
777 c = 0;
778 offset = 0;
779 count += ret;
780 /* We are not covered by a preallocated extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800781 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
782 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700783 /* Is there any real extent? - otherwise we overwrite
784 * the fake one... */
785 if (count)
786 c = !c;
787 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700788 inode->i_sb->s_blocksize;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800789 memset(&laarr[c].extLocation, 0x00,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200790 sizeof(struct kernel_lb_addr));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700791 count++;
Jan Kara31170b62007-05-08 00:35:21 -0700792 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700793 endnum = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 lastblock = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700795 } else {
Namjae Jeonfb719c52012-10-10 00:09:12 +0900796 isBeyondEOF = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 endnum = startnum = ((count > 2) ? 2 : count);
798
Marcin Slusarz4b111112008-02-08 04:20:36 -0800799 /* if the current extent is in position 0,
800 swap it with the previous */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700801 if (!c && count != 1) {
Jan Kara31170b62007-05-08 00:35:21 -0700802 laarr[2] = laarr[0];
803 laarr[0] = laarr[1];
804 laarr[1] = laarr[2];
805 c = 1;
806 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
Marcin Slusarz4b111112008-02-08 04:20:36 -0800808 /* if the current block is located in an extent,
809 read the next extent */
810 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
811 if (etype != -1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700812 laarr[c + 1].extLength = (etype << 30) | elen;
813 laarr[c + 1].extLocation = eloc;
814 count++;
815 startnum++;
816 endnum++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800817 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 lastblock = 1;
819 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 /* if the current extent is not recorded but allocated, get the
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700822 * block in the extent corresponding to the requested block */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800823 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800825 else { /* otherwise, allocate a new block */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800826 if (iinfo->i_next_alloc_block == block)
827 goal = iinfo->i_next_alloc_goal;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700829 if (!goal) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800830 if (!(goal = pgoal)) /* XXX: what was intended here? */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800831 goal = iinfo->i_location.logicalBlockNum + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 }
833
Marcin Slusarz4b111112008-02-08 04:20:36 -0800834 newblocknum = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800835 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800836 goal, err);
837 if (!newblocknum) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700838 brelse(prev_epos.bh);
Namjae Jeon2fb7d992012-10-10 00:08:56 +0900839 brelse(cur_epos.bh);
840 brelse(next_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 *err = -ENOSPC;
Jan Kara7b0b0932011-12-10 01:43:33 +0100842 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 }
Namjae Jeonfb719c52012-10-10 00:09:12 +0900844 if (isBeyondEOF)
845 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 }
847
Marcin Slusarz4b111112008-02-08 04:20:36 -0800848 /* if the extent the requsted block is located in contains multiple
849 * blocks, split the extent into at most three extents. blocks prior
850 * to requested block, requested block, and blocks after requested
851 * block */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
853
854#ifdef UDF_PREALLOCATE
Jan Kara81056dd2009-07-16 18:02:25 +0200855 /* We preallocate blocks only for regular files. It also makes sense
856 * for directories but there's a problem when to drop the
857 * preallocation. We might use some delayed work for that but I feel
858 * it's overengineering for a filesystem like UDF. */
859 if (S_ISREG(inode->i_mode))
860 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861#endif
862
863 /* merge any continuous blocks in laarr */
864 udf_merge_extents(inode, laarr, &endnum);
865
866 /* write back the new extents, inserting new extents if the new number
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700867 * of extents is greater than the old number, and deleting extents if
868 * the new number of extents is less than the old number */
Jan Karaff116fc2007-05-08 00:35:14 -0700869 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
Jan Kara3bf25cb2007-05-08 00:35:16 -0700871 brelse(prev_epos.bh);
Namjae Jeon2fb7d992012-10-10 00:08:56 +0900872 brelse(cur_epos.bh);
873 brelse(next_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Marcin Slusarz4b111112008-02-08 04:20:36 -0800875 newblock = udf_get_pblock(inode->i_sb, newblocknum,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800876 iinfo->i_location.partitionReferenceNum, 0);
Jan Kara7b0b0932011-12-10 01:43:33 +0100877 if (!newblock) {
878 *err = -EIO;
879 return 0;
880 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 *new = 1;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800882 iinfo->i_next_alloc_block = block;
883 iinfo->i_next_alloc_goal = newblocknum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 inode->i_ctime = current_fs_time(inode->i_sb);
885
886 if (IS_SYNC(inode))
887 udf_sync_inode(inode);
888 else
889 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700890
Jan Kara7b0b0932011-12-10 01:43:33 +0100891 return newblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892}
893
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700894static void udf_split_extents(struct inode *inode, int *c, int offset,
895 int newblocknum,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200896 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700897 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800899 unsigned long blocksize = inode->i_sb->s_blocksize;
900 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
901
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
Marcin Slusarz4b111112008-02-08 04:20:36 -0800903 (laarr[*c].extLength >> 30) ==
904 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 int curr = *c;
906 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800907 blocksize - 1) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 int8_t etype = (laarr[curr].extLength >> 30);
909
Marcin Slusarz4b111112008-02-08 04:20:36 -0800910 if (blen == 1)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700911 ;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800912 else if (!offset || blen == offset + 1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700913 laarr[curr + 2] = laarr[curr + 1];
914 laarr[curr + 1] = laarr[curr];
915 } else {
916 laarr[curr + 3] = laarr[curr + 1];
917 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 }
919
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700920 if (offset) {
921 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800922 udf_free_blocks(inode->i_sb, inode,
Pekka Enberg97e961f2008-10-15 12:29:03 +0200923 &laarr[curr].extLocation,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800924 0, offset);
925 laarr[curr].extLength =
926 EXT_NOT_RECORDED_NOT_ALLOCATED |
927 (offset << blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 laarr[curr].extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800929 laarr[curr].extLocation.
930 partitionReferenceNum = 0;
931 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800933 (offset << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700934 curr++;
935 (*c)++;
936 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -0700938
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 laarr[curr].extLocation.logicalBlockNum = newblocknum;
940 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
941 laarr[curr].extLocation.partitionReferenceNum =
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800942 UDF_I(inode)->i_location.partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800944 blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700945 curr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700947 if (blen != offset + 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800949 laarr[curr].extLocation.logicalBlockNum +=
950 offset + 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700951 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800952 ((blen - (offset + 1)) << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700953 curr++;
954 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 }
956 }
957}
958
959static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200960 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700961 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962{
963 int start, length = 0, currlength = 0, i;
964
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700965 if (*endnum >= (c + 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 if (!lastblock)
967 return;
968 else
969 start = c;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700970 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800971 if ((laarr[c + 1].extLength >> 30) ==
972 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700973 start = c + 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800974 length = currlength =
975 (((laarr[c + 1].extLength &
976 UDF_EXTENT_LENGTH_MASK) +
977 inode->i_sb->s_blocksize - 1) >>
978 inode->i_sb->s_blocksize_bits);
979 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 start = c;
981 }
982
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700983 for (i = start + 1; i <= *endnum; i++) {
984 if (i == *endnum) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 if (lastblock)
986 length += UDF_DEFAULT_PREALLOC_BLOCKS;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800987 } else if ((laarr[i].extLength >> 30) ==
988 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
989 length += (((laarr[i].extLength &
990 UDF_EXTENT_LENGTH_MASK) +
991 inode->i_sb->s_blocksize - 1) >>
992 inode->i_sb->s_blocksize_bits);
993 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 break;
995 }
996
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700997 if (length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 int next = laarr[start].extLocation.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700999 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -08001000 inode->i_sb->s_blocksize - 1) >>
1001 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001003 laarr[start].extLocation.partitionReferenceNum,
1004 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
1005 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
1006 currlength);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001007 if (numalloc) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001008 if (start == (c + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 laarr[start].extLength +=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001010 (numalloc <<
1011 inode->i_sb->s_blocksize_bits);
1012 else {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001013 memmove(&laarr[c + 2], &laarr[c + 1],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001014 sizeof(struct long_ad) * (*endnum - (c + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001015 (*endnum)++;
1016 laarr[c + 1].extLocation.logicalBlockNum = next;
1017 laarr[c + 1].extLocation.partitionReferenceNum =
Marcin Slusarz4b111112008-02-08 04:20:36 -08001018 laarr[c].extLocation.
1019 partitionReferenceNum;
1020 laarr[c + 1].extLength =
1021 EXT_NOT_RECORDED_ALLOCATED |
1022 (numalloc <<
1023 inode->i_sb->s_blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001024 start = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 }
1026
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001027 for (i = start + 1; numalloc && i < *endnum; i++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001028 int elen = ((laarr[i].extLength &
1029 UDF_EXTENT_LENGTH_MASK) +
1030 inode->i_sb->s_blocksize - 1) >>
1031 inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001033 if (elen > numalloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 laarr[i].extLength -=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001035 (numalloc <<
1036 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 numalloc = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001038 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 numalloc -= elen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001040 if (*endnum > (i + 1))
Marcin Slusarz4b111112008-02-08 04:20:36 -08001041 memmove(&laarr[i],
1042 &laarr[i + 1],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001043 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001044 (*endnum - (i + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001045 i--;
1046 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 }
1048 }
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001049 UDF_I(inode)->i_lenExtents +=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001050 numalloc << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 }
1052 }
1053}
1054
1055static void udf_merge_extents(struct inode *inode,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001056 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001057 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058{
1059 int i;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001060 unsigned long blocksize = inode->i_sb->s_blocksize;
1061 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001063 for (i = 0; i < (*endnum - 1); i++) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001064 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
1065 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066
Marcin Slusarz4b111112008-02-08 04:20:36 -08001067 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
1068 (((li->extLength >> 30) ==
1069 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1070 ((lip1->extLocation.logicalBlockNum -
1071 li->extLocation.logicalBlockNum) ==
1072 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1073 blocksize - 1) >> blocksize_bits)))) {
1074
1075 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1076 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1077 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1078 lip1->extLength = (lip1->extLength -
1079 (li->extLength &
1080 UDF_EXTENT_LENGTH_MASK) +
1081 UDF_EXTENT_LENGTH_MASK) &
1082 ~(blocksize - 1);
1083 li->extLength = (li->extLength &
1084 UDF_EXTENT_FLAG_MASK) +
1085 (UDF_EXTENT_LENGTH_MASK + 1) -
1086 blocksize;
1087 lip1->extLocation.logicalBlockNum =
1088 li->extLocation.logicalBlockNum +
1089 ((li->extLength &
1090 UDF_EXTENT_LENGTH_MASK) >>
1091 blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001092 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001093 li->extLength = lip1->extLength +
1094 (((li->extLength &
1095 UDF_EXTENT_LENGTH_MASK) +
1096 blocksize - 1) & ~(blocksize - 1));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001097 if (*endnum > (i + 2))
1098 memmove(&laarr[i + 1], &laarr[i + 2],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001099 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001100 (*endnum - (i + 2)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001101 i--;
1102 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001104 } else if (((li->extLength >> 30) ==
1105 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1106 ((lip1->extLength >> 30) ==
1107 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02001108 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001109 ((li->extLength &
1110 UDF_EXTENT_LENGTH_MASK) +
1111 blocksize - 1) >> blocksize_bits);
1112 li->extLocation.logicalBlockNum = 0;
1113 li->extLocation.partitionReferenceNum = 0;
1114
1115 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1116 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1117 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1118 lip1->extLength = (lip1->extLength -
1119 (li->extLength &
1120 UDF_EXTENT_LENGTH_MASK) +
1121 UDF_EXTENT_LENGTH_MASK) &
1122 ~(blocksize - 1);
1123 li->extLength = (li->extLength &
1124 UDF_EXTENT_FLAG_MASK) +
1125 (UDF_EXTENT_LENGTH_MASK + 1) -
1126 blocksize;
1127 } else {
1128 li->extLength = lip1->extLength +
1129 (((li->extLength &
1130 UDF_EXTENT_LENGTH_MASK) +
1131 blocksize - 1) & ~(blocksize - 1));
1132 if (*endnum > (i + 2))
1133 memmove(&laarr[i + 1], &laarr[i + 2],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001134 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001135 (*endnum - (i + 2)));
1136 i--;
1137 (*endnum)--;
1138 }
1139 } else if ((li->extLength >> 30) ==
1140 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1141 udf_free_blocks(inode->i_sb, inode,
Pekka Enberg97e961f2008-10-15 12:29:03 +02001142 &li->extLocation, 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001143 ((li->extLength &
1144 UDF_EXTENT_LENGTH_MASK) +
1145 blocksize - 1) >> blocksize_bits);
1146 li->extLocation.logicalBlockNum = 0;
1147 li->extLocation.partitionReferenceNum = 0;
1148 li->extLength = (li->extLength &
1149 UDF_EXTENT_LENGTH_MASK) |
1150 EXT_NOT_RECORDED_NOT_ALLOCATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 }
1152 }
1153}
1154
1155static void udf_update_extents(struct inode *inode,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001156 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001157 int startnum, int endnum,
1158 struct extent_position *epos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159{
1160 int start = 0, i;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001161 struct kernel_lb_addr tmploc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 uint32_t tmplen;
1163
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001164 if (startnum > endnum) {
1165 for (i = 0; i < (startnum - endnum); i++)
Jan Karaff116fc2007-05-08 00:35:14 -07001166 udf_delete_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001167 laarr[i].extLength);
1168 } else if (startnum < endnum) {
1169 for (i = 0; i < (endnum - startnum); i++) {
Jan Karaff116fc2007-05-08 00:35:14 -07001170 udf_insert_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001171 laarr[i].extLength);
Jan Karaff116fc2007-05-08 00:35:14 -07001172 udf_next_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001173 &laarr[i].extLength, 1);
1174 start++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 }
1176 }
1177
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001178 for (i = start; i < endnum; i++) {
Jan Karaff116fc2007-05-08 00:35:14 -07001179 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001180 udf_write_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001181 laarr[i].extLength, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 }
1183}
1184
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001185struct buffer_head *udf_bread(struct inode *inode, int block,
1186 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001188 struct buffer_head *bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189
1190 bh = udf_getblk(inode, block, create, err);
1191 if (!bh)
1192 return NULL;
1193
1194 if (buffer_uptodate(bh))
1195 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001196
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 ll_rw_block(READ, 1, &bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001198
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 wait_on_buffer(bh);
1200 if (buffer_uptodate(bh))
1201 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001202
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 brelse(bh);
1204 *err = -EIO;
1205 return NULL;
1206}
1207
Jan Kara7e49b6f2010-10-22 00:30:26 +02001208int udf_setsize(struct inode *inode, loff_t newsize)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001211 struct udf_inode_info *iinfo;
Jan Kara7e49b6f2010-10-22 00:30:26 +02001212 int bsize = 1 << inode->i_blkbits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
1214 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001215 S_ISLNK(inode->i_mode)))
Jan Kara7e49b6f2010-10-22 00:30:26 +02001216 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
Jan Kara7e49b6f2010-10-22 00:30:26 +02001218 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001220 iinfo = UDF_I(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001221 if (newsize > inode->i_size) {
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001222 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001223 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1224 if (bsize <
1225 (udf_file_entry_alloc_offset(inode) + newsize)) {
1226 err = udf_expand_file_adinicb(inode);
Jan Karad2eb8c32011-12-10 02:30:48 +01001227 if (err)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001228 return err;
Jan Karad2eb8c32011-12-10 02:30:48 +01001229 down_write(&iinfo->i_data_sem);
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001230 } else {
Jan Kara7e49b6f2010-10-22 00:30:26 +02001231 iinfo->i_lenAlloc = newsize;
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001232 goto set_size;
1233 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 }
Jan Kara7e49b6f2010-10-22 00:30:26 +02001235 err = udf_extend_file(inode, newsize);
1236 if (err) {
1237 up_write(&iinfo->i_data_sem);
1238 return err;
1239 }
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001240set_size:
Jan Kara7e49b6f2010-10-22 00:30:26 +02001241 truncate_setsize(inode, newsize);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001242 up_write(&iinfo->i_data_sem);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001243 } else {
Jan Kara7e49b6f2010-10-22 00:30:26 +02001244 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1245 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +09001246 udf_clear_extent_cache(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001247 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1248 0x00, bsize - newsize -
1249 udf_file_entry_alloc_offset(inode));
1250 iinfo->i_lenAlloc = newsize;
1251 truncate_setsize(inode, newsize);
1252 up_write(&iinfo->i_data_sem);
1253 goto update_time;
1254 }
1255 err = block_truncate_page(inode->i_mapping, newsize,
1256 udf_get_block);
1257 if (err)
1258 return err;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001259 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +09001260 udf_clear_extent_cache(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001261 truncate_setsize(inode, newsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 udf_truncate_extents(inode);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001263 up_write(&iinfo->i_data_sem);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001264 }
Jan Kara7e49b6f2010-10-22 00:30:26 +02001265update_time:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1267 if (IS_SYNC(inode))
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001268 udf_sync_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 else
1270 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001271 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272}
1273
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001274static void __udf_read_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275{
1276 struct buffer_head *bh = NULL;
1277 struct fileEntry *fe;
1278 uint16_t ident;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001279 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280
1281 /*
1282 * Set defaults, but the inode is still incomplete!
1283 * Note: get_new_inode() sets the following on a new inode:
1284 * i_sb = sb
1285 * i_no = ino
1286 * i_flags = sb->s_flags
1287 * i_state = 0
1288 * clean_inode(): zero fills and sets
1289 * i_count = 1
1290 * i_nlink = 1
1291 * i_op = NULL;
1292 */
Pekka Enberg97e961f2008-10-15 12:29:03 +02001293 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001294 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07001295 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 make_bad_inode(inode);
1297 return;
1298 }
1299
1300 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001301 ident != TAG_IDENT_USE) {
Joe Perches78ace702011-10-10 01:08:05 -07001302 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1303 inode->i_ino, ident);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001304 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 make_bad_inode(inode);
1306 return;
1307 }
1308
1309 fe = (struct fileEntry *)bh->b_data;
1310
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001311 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001312 struct buffer_head *ibh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
Pekka Enberg97e961f2008-10-15 12:29:03 +02001314 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001315 &ident);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001316 if (ident == TAG_IDENT_IE && ibh) {
1317 struct buffer_head *nbh = NULL;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001318 struct kernel_lb_addr loc;
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001319 struct indirectEntry *ie;
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001320
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001321 ie = (struct indirectEntry *)ibh->b_data;
1322 loc = lelb_to_cpu(ie->indirectICB.extLocation);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001323
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001324 if (ie->indirectICB.extLength &&
Pekka Enberg97e961f2008-10-15 12:29:03 +02001325 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0,
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001326 &ident))) {
1327 if (ident == TAG_IDENT_FE ||
1328 ident == TAG_IDENT_EFE) {
1329 memcpy(&iinfo->i_location,
1330 &loc,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001331 sizeof(struct kernel_lb_addr));
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001332 brelse(bh);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001333 brelse(ibh);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001334 brelse(nbh);
1335 __udf_read_inode(inode);
1336 return;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001337 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001338 brelse(nbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001340 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001341 brelse(ibh);
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001342 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
Joe Perches78ace702011-10-10 01:08:05 -07001343 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1344 le16_to_cpu(fe->icbTag.strategyType));
Jan Kara3bf25cb2007-05-08 00:35:16 -07001345 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 make_bad_inode(inode);
1347 return;
1348 }
1349 udf_fill_inode(inode, bh);
Jan Kara31170b62007-05-08 00:35:21 -07001350
Jan Kara3bf25cb2007-05-08 00:35:16 -07001351 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352}
1353
1354static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1355{
1356 struct fileEntry *fe;
1357 struct extendedFileEntry *efe;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001358 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001359 struct udf_inode_info *iinfo = UDF_I(inode);
Miklos Szeredibfe86842011-10-28 14:13:29 +02001360 unsigned int link_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
1362 fe = (struct fileEntry *)bh->b_data;
1363 efe = (struct extendedFileEntry *)bh->b_data;
1364
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001365 if (fe->icbTag.strategyType == cpu_to_le16(4))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001366 iinfo->i_strat4096 = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001367 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001368 iinfo->i_strat4096 = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001370 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
Marcin Slusarz4b111112008-02-08 04:20:36 -08001371 ICBTAG_FLAG_AD_MASK;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001372 iinfo->i_unique = 0;
1373 iinfo->i_lenEAttr = 0;
1374 iinfo->i_lenExtents = 0;
1375 iinfo->i_lenAlloc = 0;
1376 iinfo->i_next_alloc_block = 0;
1377 iinfo->i_next_alloc_goal = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001378 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001379 iinfo->i_efe = 1;
1380 iinfo->i_use = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001381 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1382 sizeof(struct extendedFileEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001383 make_bad_inode(inode);
1384 return;
1385 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001386 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001387 bh->b_data + sizeof(struct extendedFileEntry),
1388 inode->i_sb->s_blocksize -
1389 sizeof(struct extendedFileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001390 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001391 iinfo->i_efe = 0;
1392 iinfo->i_use = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001393 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1394 sizeof(struct fileEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001395 make_bad_inode(inode);
1396 return;
1397 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001398 memcpy(iinfo->i_ext.i_data,
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001399 bh->b_data + sizeof(struct fileEntry),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001400 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001401 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001402 iinfo->i_efe = 0;
1403 iinfo->i_use = 1;
1404 iinfo->i_lenAlloc = le32_to_cpu(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001405 ((struct unallocSpaceEntry *)bh->b_data)->
1406 lengthAllocDescs);
1407 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1408 sizeof(struct unallocSpaceEntry))) {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001409 make_bad_inode(inode);
1410 return;
1411 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001412 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001413 bh->b_data + sizeof(struct unallocSpaceEntry),
1414 inode->i_sb->s_blocksize -
1415 sizeof(struct unallocSpaceEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 return;
1417 }
1418
Jan Karac03cad22010-10-20 22:17:28 +02001419 read_lock(&sbi->s_cred_lock);
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001420 i_uid_write(inode, le32_to_cpu(fe->uid));
1421 if (!uid_valid(inode->i_uid) ||
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001422 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1423 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001424 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001426 i_gid_write(inode, le32_to_cpu(fe->gid));
1427 if (!gid_valid(inode->i_gid) ||
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001428 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1429 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001430 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001432 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001433 sbi->s_fmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001434 inode->i_mode = sbi->s_fmode;
1435 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001436 sbi->s_dmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001437 inode->i_mode = sbi->s_dmode;
1438 else
1439 inode->i_mode = udf_convert_permissions(fe);
1440 inode->i_mode &= ~sbi->s_umask;
Jan Karac03cad22010-10-20 22:17:28 +02001441 read_unlock(&sbi->s_cred_lock);
1442
Miklos Szeredibfe86842011-10-28 14:13:29 +02001443 link_count = le16_to_cpu(fe->fileLinkCount);
1444 if (!link_count)
1445 link_count = 1;
1446 set_nlink(inode, link_count);
Jan Karac03cad22010-10-20 22:17:28 +02001447
1448 inode->i_size = le64_to_cpu(fe->informationLength);
1449 iinfo->i_lenExtents = inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001451 if (iinfo->i_efe == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001453 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454
Marcin Slusarz56774802008-02-10 11:25:31 +01001455 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001456 inode->i_atime = sbi->s_record_time;
1457
Marcin Slusarz56774802008-02-10 11:25:31 +01001458 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1459 fe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001460 inode->i_mtime = sbi->s_record_time;
1461
Marcin Slusarz56774802008-02-10 11:25:31 +01001462 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001463 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001465 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1466 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1467 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001468 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001469 } else {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001470 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001471 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472
Marcin Slusarz56774802008-02-10 11:25:31 +01001473 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001474 inode->i_atime = sbi->s_record_time;
1475
Marcin Slusarz56774802008-02-10 11:25:31 +01001476 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1477 efe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001478 inode->i_mtime = sbi->s_record_time;
1479
Marcin Slusarz56774802008-02-10 11:25:31 +01001480 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001481 iinfo->i_crtime = sbi->s_record_time;
1482
Marcin Slusarz56774802008-02-10 11:25:31 +01001483 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001484 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001486 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1487 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1488 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001489 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 }
1491
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001492 switch (fe->icbTag.fileType) {
1493 case ICBTAG_FILE_TYPE_DIRECTORY:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001494 inode->i_op = &udf_dir_inode_operations;
1495 inode->i_fop = &udf_dir_operations;
1496 inode->i_mode |= S_IFDIR;
1497 inc_nlink(inode);
1498 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001499 case ICBTAG_FILE_TYPE_REALTIME:
1500 case ICBTAG_FILE_TYPE_REGULAR:
1501 case ICBTAG_FILE_TYPE_UNDEF:
Jan Kara742e1792008-04-08 01:17:52 +02001502 case ICBTAG_FILE_TYPE_VAT20:
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001503 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001504 inode->i_data.a_ops = &udf_adinicb_aops;
1505 else
1506 inode->i_data.a_ops = &udf_aops;
1507 inode->i_op = &udf_file_inode_operations;
1508 inode->i_fop = &udf_file_operations;
1509 inode->i_mode |= S_IFREG;
1510 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001511 case ICBTAG_FILE_TYPE_BLOCK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001512 inode->i_mode |= S_IFBLK;
1513 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001514 case ICBTAG_FILE_TYPE_CHAR:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001515 inode->i_mode |= S_IFCHR;
1516 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001517 case ICBTAG_FILE_TYPE_FIFO:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001518 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1519 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001520 case ICBTAG_FILE_TYPE_SOCKET:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001521 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1522 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001523 case ICBTAG_FILE_TYPE_SYMLINK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001524 inode->i_data.a_ops = &udf_symlink_aops;
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001525 inode->i_op = &udf_symlink_inode_operations;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001526 inode->i_mode = S_IFLNK | S_IRWXUGO;
1527 break;
Jan Karabfb257a2008-04-08 20:37:21 +02001528 case ICBTAG_FILE_TYPE_MAIN:
1529 udf_debug("METADATA FILE-----\n");
1530 break;
1531 case ICBTAG_FILE_TYPE_MIRROR:
1532 udf_debug("METADATA MIRROR FILE-----\n");
1533 break;
1534 case ICBTAG_FILE_TYPE_BITMAP:
1535 udf_debug("METADATA BITMAP FILE-----\n");
1536 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001537 default:
Joe Perches78ace702011-10-10 01:08:05 -07001538 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1539 inode->i_ino, fe->icbTag.fileType);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001540 make_bad_inode(inode);
1541 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001543 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001544 struct deviceSpec *dsea =
1545 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001546 if (dsea) {
1547 init_special_inode(inode, inode->i_mode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001548 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1549 le32_to_cpu(dsea->minorDeviceIdent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 /* Developer ID ??? */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001551 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 make_bad_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553 }
1554}
1555
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001556static int udf_alloc_i_data(struct inode *inode, size_t size)
1557{
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001558 struct udf_inode_info *iinfo = UDF_I(inode);
1559 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001560
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001561 if (!iinfo->i_ext.i_data) {
Joe Perches78ace702011-10-10 01:08:05 -07001562 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1563 inode->i_ino);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001564 return -ENOMEM;
1565 }
1566
1567 return 0;
1568}
1569
Al Virofaa17292011-07-26 03:18:29 -04001570static umode_t udf_convert_permissions(struct fileEntry *fe)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571{
Al Virofaa17292011-07-26 03:18:29 -04001572 umode_t mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 uint32_t permissions;
1574 uint32_t flags;
1575
1576 permissions = le32_to_cpu(fe->permissions);
1577 flags = le16_to_cpu(fe->icbTag.flags);
1578
Marcin Slusarz4b111112008-02-08 04:20:36 -08001579 mode = ((permissions) & S_IRWXO) |
1580 ((permissions >> 2) & S_IRWXG) |
1581 ((permissions >> 4) & S_IRWXU) |
1582 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1583 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1584 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585
1586 return mode;
1587}
1588
Christoph Hellwiga9185b42010-03-05 09:21:37 +01001589int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590{
Jan Kara49521de2010-10-20 17:42:44 +02001591 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592}
1593
Jan Kara49521de2010-10-20 17:42:44 +02001594static int udf_sync_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595{
1596 return udf_update_inode(inode, 1);
1597}
1598
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001599static int udf_update_inode(struct inode *inode, int do_sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600{
1601 struct buffer_head *bh = NULL;
1602 struct fileEntry *fe;
1603 struct extendedFileEntry *efe;
Steve Nickelb2527bf2012-02-16 12:53:53 -05001604 uint64_t lb_recorded;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 uint32_t udfperms;
1606 uint16_t icbflags;
1607 uint16_t crclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 int err = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001609 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001610 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001611 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612
Jan Kara5833ded2010-01-08 16:52:59 +01001613 bh = udf_tgetblk(inode->i_sb,
1614 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001615 if (!bh) {
Jan Karaaae917c2010-01-08 16:46:29 +01001616 udf_debug("getblk failure\n");
1617 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 }
1619
Jan Karaaae917c2010-01-08 16:46:29 +01001620 lock_buffer(bh);
1621 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 fe = (struct fileEntry *)bh->b_data;
1623 efe = (struct extendedFileEntry *)bh->b_data;
1624
Jan Karaaae917c2010-01-08 16:46:29 +01001625 if (iinfo->i_use) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 struct unallocSpaceEntry *use =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001627 (struct unallocSpaceEntry *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001629 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001630 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001631 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001632 sizeof(struct unallocSpaceEntry));
Jan Karaaae917c2010-01-08 16:46:29 +01001633 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1634 use->descTag.tagLocation =
1635 cpu_to_le32(iinfo->i_location.logicalBlockNum);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001636 crclen = sizeof(struct unallocSpaceEntry) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001637 iinfo->i_lenAlloc - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638 use->descTag.descCRCLength = cpu_to_le16(crclen);
Bob Copelandf845fce2008-04-17 09:47:48 +02001639 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001640 sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001641 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001642 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643
Jan Karaaae917c2010-01-08 16:46:29 +01001644 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 }
1646
Phillip Susi4d6660e2006-03-07 21:55:24 -08001647 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1648 fe->uid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001649 else
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001650 fe->uid = cpu_to_le32(i_uid_read(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651
Phillip Susi4d6660e2006-03-07 21:55:24 -08001652 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1653 fe->gid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001654 else
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001655 fe->gid = cpu_to_le32(i_gid_read(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656
Marcin Slusarz4b111112008-02-08 04:20:36 -08001657 udfperms = ((inode->i_mode & S_IRWXO)) |
1658 ((inode->i_mode & S_IRWXG) << 2) |
1659 ((inode->i_mode & S_IRWXU) << 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Marcin Slusarz4b111112008-02-08 04:20:36 -08001661 udfperms |= (le32_to_cpu(fe->permissions) &
1662 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1663 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1664 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 fe->permissions = cpu_to_le32(udfperms);
1666
1667 if (S_ISDIR(inode->i_mode))
1668 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1669 else
1670 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1671
1672 fe->informationLength = cpu_to_le64(inode->i_size);
1673
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001674 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001675 struct regid *eid;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001676 struct deviceSpec *dsea =
1677 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001678 if (!dsea) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 dsea = (struct deviceSpec *)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001680 udf_add_extendedattr(inode,
1681 sizeof(struct deviceSpec) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001682 sizeof(struct regid), 12, 0x3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 dsea->attrType = cpu_to_le32(12);
1684 dsea->attrSubtype = 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001685 dsea->attrLength = cpu_to_le32(
1686 sizeof(struct deviceSpec) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001687 sizeof(struct regid));
1688 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 }
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001690 eid = (struct regid *)dsea->impUse;
1691 memset(eid, 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692 strcpy(eid->ident, UDF_ID_DEVELOPER);
1693 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1694 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1695 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1696 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1697 }
1698
Steve Nickelb2527bf2012-02-16 12:53:53 -05001699 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1700 lb_recorded = 0; /* No extents => no blocks! */
1701 else
1702 lb_recorded =
1703 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1704 (blocksize_bits - 9);
1705
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001706 if (iinfo->i_efe == 0) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001707 memcpy(bh->b_data + sizeof(struct fileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001708 iinfo->i_ext.i_data,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001709 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Steve Nickelb2527bf2012-02-16 12:53:53 -05001710 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711
Marcin Slusarz56774802008-02-10 11:25:31 +01001712 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1713 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1714 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001715 memset(&(fe->impIdent), 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1717 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1718 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001719 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1720 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1721 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001722 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1724 crclen = sizeof(struct fileEntry);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001725 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001726 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001727 iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001728 inode->i_sb->s_blocksize -
1729 sizeof(struct extendedFileEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 efe->objectSize = cpu_to_le64(inode->i_size);
Steve Nickelb2527bf2012-02-16 12:53:53 -05001731 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001733 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1734 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1735 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1736 iinfo->i_crtime = inode->i_atime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001737
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001738 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1739 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1740 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1741 iinfo->i_crtime = inode->i_mtime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001742
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001743 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1744 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1745 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1746 iinfo->i_crtime = inode->i_ctime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747
Marcin Slusarz56774802008-02-10 11:25:31 +01001748 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1749 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1750 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1751 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001753 memset(&(efe->impIdent), 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1755 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1756 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001757 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1758 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1759 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001760 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1762 crclen = sizeof(struct extendedFileEntry);
1763 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001764 if (iinfo->i_strat4096) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 fe->icbTag.strategyType = cpu_to_le16(4096);
1766 fe->icbTag.strategyParameter = cpu_to_le16(1);
1767 fe->icbTag.numEntries = cpu_to_le16(2);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001768 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 fe->icbTag.strategyType = cpu_to_le16(4);
1770 fe->icbTag.numEntries = cpu_to_le16(1);
1771 }
1772
1773 if (S_ISDIR(inode->i_mode))
1774 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1775 else if (S_ISREG(inode->i_mode))
1776 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1777 else if (S_ISLNK(inode->i_mode))
1778 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1779 else if (S_ISBLK(inode->i_mode))
1780 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1781 else if (S_ISCHR(inode->i_mode))
1782 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1783 else if (S_ISFIFO(inode->i_mode))
1784 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1785 else if (S_ISSOCK(inode->i_mode))
1786 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1787
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001788 icbflags = iinfo->i_alloc_type |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001789 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1790 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1791 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1792 (le16_to_cpu(fe->icbTag.flags) &
1793 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1794 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795
1796 fe->icbTag.flags = cpu_to_le16(icbflags);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001797 if (sbi->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 fe->descTag.descVersion = cpu_to_le16(3);
1799 else
1800 fe->descTag.descVersion = cpu_to_le16(2);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001801 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001802 fe->descTag.tagLocation = cpu_to_le32(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001803 iinfo->i_location.logicalBlockNum);
Jan Karaaae917c2010-01-08 16:46:29 +01001804 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 fe->descTag.descCRCLength = cpu_to_le16(crclen);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001806 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001807 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001808 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809
Jan Karaaae917c2010-01-08 16:46:29 +01001810out:
Jan Kara5833ded2010-01-08 16:52:59 +01001811 set_buffer_uptodate(bh);
Jan Karaaae917c2010-01-08 16:46:29 +01001812 unlock_buffer(bh);
1813
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 /* write the data blocks */
1815 mark_buffer_dirty(bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001816 if (do_sync) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 sync_dirty_buffer(bh);
Jan Karaaae917c2010-01-08 16:46:29 +01001818 if (buffer_write_io_error(bh)) {
Joe Perches78ace702011-10-10 01:08:05 -07001819 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1820 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821 err = -EIO;
1822 }
1823 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001824 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001825
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 return err;
1827}
1828
Pekka Enberg97e961f2008-10-15 12:29:03 +02001829struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830{
1831 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1832 struct inode *inode = iget_locked(sb, block);
1833
1834 if (!inode)
1835 return NULL;
1836
1837 if (inode->i_state & I_NEW) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02001838 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 __udf_read_inode(inode);
1840 unlock_new_inode(inode);
1841 }
1842
1843 if (is_bad_inode(inode))
1844 goto out_iput;
1845
Pekka Enberg97e961f2008-10-15 12:29:03 +02001846 if (ino->logicalBlockNum >= UDF_SB(sb)->
1847 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 udf_debug("block=%d, partition=%d out of range\n",
Pekka Enberg97e961f2008-10-15 12:29:03 +02001849 ino->logicalBlockNum, ino->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 make_bad_inode(inode);
1851 goto out_iput;
1852 }
1853
1854 return inode;
1855
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001856 out_iput:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 iput(inode);
1858 return NULL;
1859}
1860
Jan Kara7e49b6f2010-10-22 00:30:26 +02001861int udf_add_aext(struct inode *inode, struct extent_position *epos,
1862 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863{
1864 int adsize;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001865 struct short_ad *sad = NULL;
1866 struct long_ad *lad = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867 struct allocExtDesc *aed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 uint8_t *ptr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001869 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870
Jan Karaff116fc2007-05-08 00:35:14 -07001871 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001872 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001873 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001874 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 else
Jan Karaff116fc2007-05-08 00:35:14 -07001876 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001878 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001879 adsize = sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001880 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001881 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 else
Jan Kara7e49b6f2010-10-22 00:30:26 +02001883 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001885 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
Al Viro391e8bb2010-01-31 21:28:48 -05001886 unsigned char *sptr, *dptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 struct buffer_head *nbh;
1888 int err, loffset;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001889 struct kernel_lb_addr obloc = epos->block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890
Marcin Slusarz4b111112008-02-08 04:20:36 -08001891 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1892 obloc.partitionReferenceNum,
1893 obloc.logicalBlockNum, &err);
1894 if (!epos->block.logicalBlockNum)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001895 return -ENOSPC;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001896 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
Pekka Enberg97e961f2008-10-15 12:29:03 +02001897 &epos->block,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001898 0));
1899 if (!nbh)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001900 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 lock_buffer(nbh);
1902 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1903 set_buffer_uptodate(nbh);
1904 unlock_buffer(nbh);
1905 mark_buffer_dirty_inode(nbh, inode);
1906
1907 aed = (struct allocExtDesc *)(nbh->b_data);
1908 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
Marcin Slusarz4b111112008-02-08 04:20:36 -08001909 aed->previousAllocExtLocation =
1910 cpu_to_le32(obloc.logicalBlockNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001911 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
Jan Karaff116fc2007-05-08 00:35:14 -07001912 loffset = epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 aed->lengthAllocDescs = cpu_to_le32(adsize);
1914 sptr = ptr - adsize;
1915 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1916 memcpy(dptr, sptr, adsize);
Jan Karaff116fc2007-05-08 00:35:14 -07001917 epos->offset = sizeof(struct allocExtDesc) + adsize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001918 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001919 loffset = epos->offset + adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 aed->lengthAllocDescs = cpu_to_le32(0);
1921 sptr = ptr;
Jan Karaff116fc2007-05-08 00:35:14 -07001922 epos->offset = sizeof(struct allocExtDesc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001924 if (epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001925 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001926 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001927 } else {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001928 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 mark_inode_dirty(inode);
1930 }
1931 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001932 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001934 epos->block.logicalBlockNum, sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 else
1936 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001937 epos->block.logicalBlockNum, sizeof(struct tag));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001938 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001939 case ICBTAG_FLAG_AD_SHORT:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001940 sad = (struct short_ad *)sptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001941 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1942 inode->i_sb->s_blocksize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001943 sad->extPosition =
1944 cpu_to_le32(epos->block.logicalBlockNum);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001945 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001946 case ICBTAG_FLAG_AD_LONG:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001947 lad = (struct long_ad *)sptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001948 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1949 inode->i_sb->s_blocksize);
1950 lad->extLocation = cpu_to_lelb(epos->block);
1951 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1952 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001954 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001955 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001956 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Jan Karaff116fc2007-05-08 00:35:14 -07001957 udf_update_tag(epos->bh->b_data, loffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001959 udf_update_tag(epos->bh->b_data,
1960 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001961 mark_buffer_dirty_inode(epos->bh, inode);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001962 brelse(epos->bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001963 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001965 }
Jan Karaff116fc2007-05-08 00:35:14 -07001966 epos->bh = nbh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967 }
1968
Jan Kara7e49b6f2010-10-22 00:30:26 +02001969 udf_write_aext(inode, epos, eloc, elen, inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001971 if (!epos->bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001972 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001974 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001975 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001976 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001977 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1978 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1979 udf_update_tag(epos->bh->b_data,
1980 epos->offset + (inc ? 0 : adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001982 udf_update_tag(epos->bh->b_data,
1983 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001984 mark_buffer_dirty_inode(epos->bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 }
1986
Jan Kara7e49b6f2010-10-22 00:30:26 +02001987 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988}
1989
Jan Kara7e49b6f2010-10-22 00:30:26 +02001990void udf_write_aext(struct inode *inode, struct extent_position *epos,
1991 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992{
1993 int adsize;
1994 uint8_t *ptr;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001995 struct short_ad *sad;
1996 struct long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001997 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998
Jan Karaff116fc2007-05-08 00:35:14 -07001999 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002000 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08002001 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002002 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 else
Jan Karaff116fc2007-05-08 00:35:14 -07002004 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002006 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002007 case ICBTAG_FLAG_AD_SHORT:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002008 sad = (struct short_ad *)ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002009 sad->extLength = cpu_to_le32(elen);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002010 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002011 adsize = sizeof(struct short_ad);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002012 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002013 case ICBTAG_FLAG_AD_LONG:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002014 lad = (struct long_ad *)ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002015 lad->extLength = cpu_to_le32(elen);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002016 lad->extLocation = cpu_to_lelb(*eloc);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002017 memset(lad->impUse, 0x00, sizeof(lad->impUse));
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002018 adsize = sizeof(struct long_ad);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002019 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002020 default:
Jan Kara7e49b6f2010-10-22 00:30:26 +02002021 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022 }
2023
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002024 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002025 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002026 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002027 struct allocExtDesc *aed =
2028 (struct allocExtDesc *)epos->bh->b_data;
Jan Karaff116fc2007-05-08 00:35:14 -07002029 udf_update_tag(epos->bh->b_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08002030 le32_to_cpu(aed->lengthAllocDescs) +
2031 sizeof(struct allocExtDesc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 }
Jan Karaff116fc2007-05-08 00:35:14 -07002033 mark_buffer_dirty_inode(epos->bh, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002034 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002036 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037
2038 if (inc)
Jan Karaff116fc2007-05-08 00:35:14 -07002039 epos->offset += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040}
2041
Marcin Slusarz4b111112008-02-08 04:20:36 -08002042int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002043 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044{
2045 int8_t etype;
2046
Jan Karaff116fc2007-05-08 00:35:14 -07002047 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002048 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002049 int block;
Jan Karaff116fc2007-05-08 00:35:14 -07002050 epos->block = *eloc;
2051 epos->offset = sizeof(struct allocExtDesc);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002052 brelse(epos->bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002053 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002054 epos->bh = udf_tread(inode->i_sb, block);
2055 if (!epos->bh) {
2056 udf_debug("reading block %d failed!\n", block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057 return -1;
2058 }
2059 }
2060
2061 return etype;
2062}
2063
Marcin Slusarz4b111112008-02-08 04:20:36 -08002064int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002065 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002066{
2067 int alen;
2068 int8_t etype;
2069 uint8_t *ptr;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002070 struct short_ad *sad;
2071 struct long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002072 struct udf_inode_info *iinfo = UDF_I(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002073
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002074 if (!epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07002075 if (!epos->offset)
2076 epos->offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002077 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08002078 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002079 iinfo->i_lenEAttr;
Marcin Slusarz4b111112008-02-08 04:20:36 -08002080 alen = udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002081 iinfo->i_lenAlloc;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002082 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002083 if (!epos->offset)
2084 epos->offset = sizeof(struct allocExtDesc);
2085 ptr = epos->bh->b_data + epos->offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002086 alen = sizeof(struct allocExtDesc) +
Marcin Slusarz4b111112008-02-08 04:20:36 -08002087 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2088 lengthAllocDescs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 }
2090
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002091 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002092 case ICBTAG_FLAG_AD_SHORT:
Marcin Slusarz4b111112008-02-08 04:20:36 -08002093 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2094 if (!sad)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095 return -1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002096 etype = le32_to_cpu(sad->extLength) >> 30;
2097 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002098 eloc->partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002099 iinfo->i_location.partitionReferenceNum;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002100 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2101 break;
2102 case ICBTAG_FLAG_AD_LONG:
Marcin Slusarz4b111112008-02-08 04:20:36 -08002103 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2104 if (!lad)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002105 return -1;
2106 etype = le32_to_cpu(lad->extLength) >> 30;
2107 *eloc = lelb_to_cpu(lad->extLocation);
2108 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2109 break;
2110 default:
Joe Perchesa983f362011-10-10 01:08:07 -07002111 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002112 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 }
2114
2115 return etype;
2116}
2117
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002118static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002119 struct kernel_lb_addr neloc, uint32_t nelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002121 struct kernel_lb_addr oeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122 uint32_t oelen;
2123 int8_t etype;
2124
Jan Karaff116fc2007-05-08 00:35:14 -07002125 if (epos.bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07002126 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002128 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002129 udf_write_aext(inode, &epos, &neloc, nelen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130 neloc = oeloc;
2131 nelen = (etype << 30) | oelen;
2132 }
Pekka Enberg97e961f2008-10-15 12:29:03 +02002133 udf_add_aext(inode, &epos, &neloc, nelen, 1);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002134 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002135
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 return (nelen >> 30);
2137}
2138
Marcin Slusarz4b111112008-02-08 04:20:36 -08002139int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002140 struct kernel_lb_addr eloc, uint32_t elen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141{
Jan Karaff116fc2007-05-08 00:35:14 -07002142 struct extent_position oepos;
2143 int adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144 int8_t etype;
2145 struct allocExtDesc *aed;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002146 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002148 if (epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002149 get_bh(epos.bh);
2150 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 }
2152
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002153 iinfo = UDF_I(inode);
2154 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002155 adsize = sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002156 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002157 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 else
2159 adsize = 0;
2160
Jan Karaff116fc2007-05-08 00:35:14 -07002161 oepos = epos;
2162 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 return -1;
2164
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002165 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002166 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002167 if (oepos.bh != epos.bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07002168 oepos.block = epos.block;
Jan Kara3bf25cb2007-05-08 00:35:16 -07002169 brelse(oepos.bh);
2170 get_bh(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -07002171 oepos.bh = epos.bh;
2172 oepos.offset = epos.offset - adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173 }
2174 }
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002175 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176 elen = 0;
2177
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002178 if (epos.bh != oepos.bh) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002179 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2180 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2181 udf_write_aext(inode, &oepos, &eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002182 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002183 iinfo->i_lenAlloc -= (adsize * 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002185 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002186 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01002187 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002188 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002189 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08002190 udf_update_tag(oepos.bh->b_data,
2191 oepos.offset - (2 * adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08002193 udf_update_tag(oepos.bh->b_data,
2194 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07002195 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002197 } else {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002198 udf_write_aext(inode, &oepos, &eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002199 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002200 iinfo->i_lenAlloc -= adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002202 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002203 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01002204 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002205 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002206 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08002207 udf_update_tag(oepos.bh->b_data,
2208 epos.offset - adsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08002210 udf_update_tag(oepos.bh->b_data,
2211 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07002212 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213 }
2214 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07002215
Jan Kara3bf25cb2007-05-08 00:35:16 -07002216 brelse(epos.bh);
2217 brelse(oepos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002218
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219 return (elen >> 30);
2220}
2221
Marcin Slusarz4b111112008-02-08 04:20:36 -08002222int8_t inode_bmap(struct inode *inode, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002223 struct extent_position *pos, struct kernel_lb_addr *eloc,
Marcin Slusarz4b111112008-02-08 04:20:36 -08002224 uint32_t *elen, sector_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225{
Marcin Slusarz4b111112008-02-08 04:20:36 -08002226 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002227 loff_t lbcount = 0, bcount =
Marcin Slusarz4b111112008-02-08 04:20:36 -08002228 (loff_t) block << blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002230 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002231
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002232 iinfo = UDF_I(inode);
Namjae Jeon99600052013-01-19 11:17:14 +09002233 if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
2234 pos->offset = 0;
2235 pos->block = iinfo->i_location;
2236 pos->bh = NULL;
2237 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238 *elen = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002239 do {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002240 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2241 if (etype == -1) {
2242 *offset = (bcount - lbcount) >> blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002243 iinfo->i_lenExtents = lbcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244 return -1;
2245 }
2246 lbcount += *elen;
2247 } while (lbcount <= bcount);
Namjae Jeon99600052013-01-19 11:17:14 +09002248 /* update extent cache */
2249 udf_update_extent_cache(inode, lbcount - *elen, pos, 1);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002250 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251
2252 return etype;
2253}
2254
Jan Kara60448b12007-05-08 00:35:13 -07002255long udf_block_map(struct inode *inode, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002257 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -07002258 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -07002259 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002260 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 int ret;
2262
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01002263 down_read(&UDF_I(inode)->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264
Marcin Slusarz4b111112008-02-08 04:20:36 -08002265 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2266 (EXT_RECORDED_ALLOCATED >> 30))
Pekka Enberg97e961f2008-10-15 12:29:03 +02002267 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002268 else
2269 ret = 0;
2270
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01002271 up_read(&UDF_I(inode)->i_data_sem);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002272 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273
2274 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2275 return udf_fixed_to_variable(ret);
2276 else
2277 return ret;
2278}