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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * inode.c
3 *
4 * PURPOSE
5 * Inode handling routines for the OSTA-UDF(tm) filesystem.
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * COPYRIGHT
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
12 *
13 * (C) 1998 Dave Boynton
14 * (C) 1998-2004 Ben Fennema
15 * (C) 1999-2000 Stelias Computing Inc
16 *
17 * HISTORY
18 *
19 * 10/04/98 dgb Added rudimentary directory functions
20 * 10/07/98 Fully working udf_block_map! It works!
21 * 11/25/98 bmap altered to better support extents
Marcin Slusarz4b111112008-02-08 04:20:36 -080022 * 12/06/98 blf partition support in udf_iget, udf_block_map
23 * and udf_read_inode
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * 12/12/98 rewrote udf_block_map to handle next extents and descs across
25 * block boundaries (which is not actually allowed)
26 * 12/20/98 added support for strategy 4096
27 * 03/07/99 rewrote udf_block_map (again)
28 * New funcs, inode_bmap, udf_next_aext
29 * 04/19/99 Support for writing device EA's for major/minor #
30 */
31
32#include "udfdecl.h"
33#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/module.h>
35#include <linux/pagemap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/writeback.h>
37#include <linux/slab.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020038#include <linux/crc-itu-t.h>
Namjae Jeonbc112322011-10-03 14:02:59 +090039#include <linux/mpage.h>
Christoph Hellwige2e40f22015-02-22 08:58:50 -080040#include <linux/uio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42#include "udf_i.h"
43#include "udf_sb.h"
44
45MODULE_AUTHOR("Ben Fennema");
46MODULE_DESCRIPTION("Universal Disk Format Filesystem");
47MODULE_LICENSE("GPL");
48
49#define EXTENT_MERGE_SIZE 5
50
Al Virofaa17292011-07-26 03:18:29 -040051static umode_t udf_convert_permissions(struct fileEntry *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052static int udf_update_inode(struct inode *, int);
Jan Kara49521de2010-10-20 17:42:44 +020053static int udf_sync_inode(struct inode *inode);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -070054static int udf_alloc_i_data(struct inode *inode, size_t size);
Jan Kara7b0b0932011-12-10 01:43:33 +010055static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
Jan Karaff116fc2007-05-08 00:35:14 -070056static int8_t udf_insert_aext(struct inode *, struct extent_position,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020057 struct kernel_lb_addr, uint32_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058static void udf_split_extents(struct inode *, int *, int, int,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020059 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static void udf_prealloc_extents(struct inode *, 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_merge_extents(struct inode *,
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_update_extents(struct inode *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020065 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070066 struct extent_position *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
68
Namjae Jeon99600052013-01-19 11:17:14 +090069static void __udf_clear_extent_cache(struct inode *inode)
70{
71 struct udf_inode_info *iinfo = UDF_I(inode);
72
73 if (iinfo->cached_extent.lstart != -1) {
74 brelse(iinfo->cached_extent.epos.bh);
75 iinfo->cached_extent.lstart = -1;
76 }
77}
78
79/* Invalidate extent cache */
80static void udf_clear_extent_cache(struct inode *inode)
81{
82 struct udf_inode_info *iinfo = UDF_I(inode);
83
84 spin_lock(&iinfo->i_extent_cache_lock);
85 __udf_clear_extent_cache(inode);
86 spin_unlock(&iinfo->i_extent_cache_lock);
87}
88
89/* Return contents of extent cache */
90static int udf_read_extent_cache(struct inode *inode, loff_t bcount,
91 loff_t *lbcount, struct extent_position *pos)
92{
93 struct udf_inode_info *iinfo = UDF_I(inode);
94 int ret = 0;
95
96 spin_lock(&iinfo->i_extent_cache_lock);
97 if ((iinfo->cached_extent.lstart <= bcount) &&
98 (iinfo->cached_extent.lstart != -1)) {
99 /* Cache hit */
100 *lbcount = iinfo->cached_extent.lstart;
101 memcpy(pos, &iinfo->cached_extent.epos,
102 sizeof(struct extent_position));
103 if (pos->bh)
104 get_bh(pos->bh);
105 ret = 1;
106 }
107 spin_unlock(&iinfo->i_extent_cache_lock);
108 return ret;
109}
110
111/* Add extent to extent cache */
112static void udf_update_extent_cache(struct inode *inode, loff_t estart,
113 struct extent_position *pos, int next_epos)
114{
115 struct udf_inode_info *iinfo = UDF_I(inode);
116
117 spin_lock(&iinfo->i_extent_cache_lock);
118 /* Invalidate previously cached extent */
119 __udf_clear_extent_cache(inode);
120 if (pos->bh)
121 get_bh(pos->bh);
122 memcpy(&iinfo->cached_extent.epos, pos,
123 sizeof(struct extent_position));
124 iinfo->cached_extent.lstart = estart;
125 if (next_epos)
126 switch (iinfo->i_alloc_type) {
127 case ICBTAG_FLAG_AD_SHORT:
128 iinfo->cached_extent.epos.offset -=
129 sizeof(struct short_ad);
130 break;
131 case ICBTAG_FLAG_AD_LONG:
132 iinfo->cached_extent.epos.offset -=
133 sizeof(struct long_ad);
134 }
135 spin_unlock(&iinfo->i_extent_cache_lock);
136}
Christoph Hellwigb1e32122008-02-22 12:38:48 +0100137
Al Viro3aac2b62010-06-07 00:43:39 -0400138void udf_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139{
Jan Kara2c948b32009-12-03 13:39:28 +0100140 struct udf_inode_info *iinfo = UDF_I(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400141 int want_delete = 0;
Jan Kara2c948b32009-12-03 13:39:28 +0100142
Al Viro3aac2b62010-06-07 00:43:39 -0400143 if (!inode->i_nlink && !is_bad_inode(inode)) {
144 want_delete = 1;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200145 udf_setsize(inode, 0);
Al Viro3aac2b62010-06-07 00:43:39 -0400146 udf_update_inode(inode, IS_SYNC(inode));
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700147 }
148 truncate_inode_pages_final(&inode->i_data);
Al Viro3aac2b62010-06-07 00:43:39 -0400149 invalidate_inode_buffers(inode);
Jan Karadbd57682012-05-03 14:48:02 +0200150 clear_inode(inode);
Jan Kara2c948b32009-12-03 13:39:28 +0100151 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
152 inode->i_size != iinfo->i_lenExtents) {
Joe Perches78ace702011-10-10 01:08:05 -0700153 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",
154 inode->i_ino, inode->i_mode,
155 (unsigned long long)inode->i_size,
156 (unsigned long long)iinfo->i_lenExtents);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800158 kfree(iinfo->i_ext.i_data);
159 iinfo->i_ext.i_data = NULL;
Namjae Jeon99600052013-01-19 11:17:14 +0900160 udf_clear_extent_cache(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400161 if (want_delete) {
Al Viro3aac2b62010-06-07 00:43:39 -0400162 udf_free_inode(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400163 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164}
165
Ian Abbott5eec54f2012-09-05 17:44:31 +0100166static void udf_write_failed(struct address_space *mapping, loff_t to)
167{
168 struct inode *inode = mapping->host;
169 struct udf_inode_info *iinfo = UDF_I(inode);
170 loff_t isize = inode->i_size;
171
172 if (to > isize) {
Kirill A. Shutemov7caef262013-09-12 15:13:56 -0700173 truncate_pagecache(inode, isize);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100174 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
175 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +0900176 udf_clear_extent_cache(inode);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100177 udf_truncate_extents(inode);
178 up_write(&iinfo->i_data_sem);
179 }
180 }
181}
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183static int udf_writepage(struct page *page, struct writeback_control *wbc)
184{
185 return block_write_full_page(page, udf_get_block, wbc);
186}
187
Namjae Jeon378b8e12012-08-31 12:49:07 -0400188static int udf_writepages(struct address_space *mapping,
189 struct writeback_control *wbc)
190{
191 return mpage_writepages(mapping, wbc, udf_get_block);
192}
193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194static int udf_readpage(struct file *file, struct page *page)
195{
Namjae Jeonbc112322011-10-03 14:02:59 +0900196 return mpage_readpage(page, udf_get_block);
197}
198
199static int udf_readpages(struct file *file, struct address_space *mapping,
200 struct list_head *pages, unsigned nr_pages)
201{
202 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203}
204
Nick Pigginbe021ee2007-10-16 01:25:20 -0700205static int udf_write_begin(struct file *file, struct address_space *mapping,
206 loff_t pos, unsigned len, unsigned flags,
207 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Christoph Hellwig155130a2010-06-04 11:29:58 +0200209 int ret;
210
211 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100212 if (unlikely(ret))
213 udf_write_failed(mapping, pos + len);
214 return ret;
215}
Jan Kara7e49b6f2010-10-22 00:30:26 +0200216
Omar Sandoval22c61862015-03-16 04:33:53 -0700217static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
Al Virod8d3d942014-03-04 21:27:34 -0500218 loff_t offset)
Ian Abbott5eec54f2012-09-05 17:44:31 +0100219{
220 struct file *file = iocb->ki_filp;
221 struct address_space *mapping = file->f_mapping;
222 struct inode *inode = mapping->host;
Al Viroa6cbcd42014-03-04 22:38:00 -0500223 size_t count = iov_iter_count(iter);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100224 ssize_t ret;
Christoph Hellwig155130a2010-06-04 11:29:58 +0200225
Omar Sandoval17f8c842015-03-16 04:33:50 -0700226 ret = blockdev_direct_IO(iocb, inode, iter, offset, udf_get_block);
Omar Sandoval6f673762015-03-16 04:33:52 -0700227 if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE))
Al Viroa6cbcd42014-03-04 22:38:00 -0500228 udf_write_failed(mapping, offset + count);
Christoph Hellwig155130a2010-06-04 11:29:58 +0200229 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
232static sector_t udf_bmap(struct address_space *mapping, sector_t block)
233{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700234 return generic_block_bmap(mapping, block, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700237const struct address_space_operations udf_aops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700238 .readpage = udf_readpage,
Namjae Jeonbc112322011-10-03 14:02:59 +0900239 .readpages = udf_readpages,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700240 .writepage = udf_writepage,
Namjae Jeon378b8e12012-08-31 12:49:07 -0400241 .writepages = udf_writepages,
Ian Abbott5eec54f2012-09-05 17:44:31 +0100242 .write_begin = udf_write_begin,
243 .write_end = generic_write_end,
244 .direct_IO = udf_direct_IO,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700245 .bmap = udf_bmap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246};
247
Jan Karad2eb8c32011-12-10 02:30:48 +0100248/*
249 * Expand file stored in ICB to a normal one-block-file
250 *
251 * This function requires i_data_sem for writing and releases it.
252 * This function requires i_mutex held
253 */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200254int udf_expand_file_adinicb(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
256 struct page *page;
257 char *kaddr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800258 struct udf_inode_info *iinfo = UDF_I(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200259 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 struct writeback_control udf_wbc = {
261 .sync_mode = WB_SYNC_NONE,
262 .nr_to_write = 1,
263 };
264
Al Viro59551022016-01-22 15:40:57 -0500265 WARN_ON_ONCE(!inode_is_locked(inode));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800266 if (!iinfo->i_lenAlloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800268 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800270 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200271 /* from now on we have normal address_space methods */
272 inode->i_data.a_ops = &udf_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100273 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200275 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 }
Jan Karad2eb8c32011-12-10 02:30:48 +0100277 /*
278 * Release i_data_sem so that we can lock a page - page lock ranks
279 * above i_data_sem. i_mutex still protects us against file changes.
280 */
281 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
Jan Kara7e49b6f2010-10-22 00:30:26 +0200283 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
284 if (!page)
285 return -ENOMEM;
Matt Mackallcd7619d2005-05-01 08:59:01 -0700286
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700287 if (!PageUptodate(page)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 kaddr = kmap(page);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800289 memset(kaddr + iinfo->i_lenAlloc, 0x00,
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300290 PAGE_SIZE - iinfo->i_lenAlloc);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800291 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
292 iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 flush_dcache_page(page);
294 SetPageUptodate(page);
295 kunmap(page);
296 }
Jan Karad2eb8c32011-12-10 02:30:48 +0100297 down_write(&iinfo->i_data_sem);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800298 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
299 iinfo->i_lenAlloc);
300 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800302 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800304 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200305 /* from now on we have normal address_space methods */
306 inode->i_data.a_ops = &udf_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100307 up_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200308 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
309 if (err) {
310 /* Restore everything back so that we don't lose data... */
311 lock_page(page);
312 kaddr = kmap(page);
Jan Karad2eb8c32011-12-10 02:30:48 +0100313 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200314 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
315 inode->i_size);
316 kunmap(page);
317 unlock_page(page);
318 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
319 inode->i_data.a_ops = &udf_adinicb_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100320 up_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200321 }
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300322 put_page(page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200324
325 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326}
327
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700328struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
329 int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 int newblock;
Jan Karaff116fc2007-05-08 00:35:14 -0700332 struct buffer_head *dbh = NULL;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200333 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 uint8_t alloctype;
Jan Karaff116fc2007-05-08 00:35:14 -0700335 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337 struct udf_fileident_bh sfibh, dfibh;
Jan Karaaf793292008-02-08 04:20:50 -0800338 loff_t f_pos = udf_ext0_offset(inode);
339 int size = udf_ext0_offset(inode) + inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 struct fileIdentDesc cfi, *sfi, *dfi;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800341 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
344 alloctype = ICBTAG_FLAG_AD_SHORT;
345 else
346 alloctype = ICBTAG_FLAG_AD_LONG;
347
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700348 if (!inode->i_size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800349 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 mark_inode_dirty(inode);
351 return NULL;
352 }
353
354 /* alloc block, and copy data to it */
355 *block = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800356 iinfo->i_location.partitionReferenceNum,
357 iinfo->i_location.logicalBlockNum, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 if (!(*block))
359 return NULL;
360 newblock = udf_get_pblock(inode->i_sb, *block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800361 iinfo->i_location.partitionReferenceNum,
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800362 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 if (!newblock)
364 return NULL;
365 dbh = udf_tgetblk(inode->i_sb, newblock);
366 if (!dbh)
367 return NULL;
368 lock_buffer(dbh);
369 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
370 set_buffer_uptodate(dbh);
371 unlock_buffer(dbh);
372 mark_buffer_dirty_inode(dbh, inode);
373
Marcin Slusarz4b111112008-02-08 04:20:36 -0800374 sfibh.soffset = sfibh.eoffset =
Jan Karaaf793292008-02-08 04:20:50 -0800375 f_pos & (inode->i_sb->s_blocksize - 1);
Jan Karaff116fc2007-05-08 00:35:14 -0700376 sfibh.sbh = sfibh.ebh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 dfibh.soffset = dfibh.eoffset = 0;
378 dfibh.sbh = dfibh.ebh = dbh;
Jan Karaaf793292008-02-08 04:20:50 -0800379 while (f_pos < size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800380 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800381 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
382 NULL, NULL, NULL);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700383 if (!sfi) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700384 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 return NULL;
386 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800387 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 sfi->descTag.tagLocation = cpu_to_le32(*block);
389 dfibh.soffset = dfibh.eoffset;
390 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
391 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
392 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800393 sfi->fileIdent +
394 le16_to_cpu(sfi->lengthOfImpUse))) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800395 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700396 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 return NULL;
398 }
399 }
400 mark_buffer_dirty_inode(dbh, inode);
401
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800402 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
403 iinfo->i_lenAlloc);
404 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 eloc.logicalBlockNum = *block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800406 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800407 iinfo->i_location.partitionReferenceNum;
Jan Kara2c948b32009-12-03 13:39:28 +0100408 iinfo->i_lenExtents = inode->i_size;
Jan Karaff116fc2007-05-08 00:35:14 -0700409 epos.bh = NULL;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800410 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700411 epos.offset = udf_file_entry_alloc_offset(inode);
Jan Kara2c948b32009-12-03 13:39:28 +0100412 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 /* UniqueID stuff */
414
Jan Kara3bf25cb2007-05-08 00:35:16 -0700415 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 mark_inode_dirty(inode);
417 return dbh;
418}
419
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700420static int udf_get_block(struct inode *inode, sector_t block,
421 struct buffer_head *bh_result, int create)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422{
423 int err, new;
Marcin Slusarz1ed16172008-02-08 04:20:48 -0800424 sector_t phys = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800425 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700427 if (!create) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 phys = udf_block_map(inode, block);
429 if (phys)
430 map_bh(bh_result, inode->i_sb, phys);
431 return 0;
432 }
433
434 err = -EIO;
435 new = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800436 iinfo = UDF_I(inode);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100437
438 down_write(&iinfo->i_data_sem);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800439 if (block == iinfo->i_next_alloc_block + 1) {
440 iinfo->i_next_alloc_block++;
441 iinfo->i_next_alloc_goal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 }
443
Namjae Jeon99600052013-01-19 11:17:14 +0900444 udf_clear_extent_cache(inode);
Jan Kara7b0b0932011-12-10 01:43:33 +0100445 phys = inode_getblk(inode, block, &err, &new);
446 if (!phys)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 goto abort;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
449 if (new)
450 set_buffer_new(bh_result);
451 map_bh(bh_result, inode->i_sb, phys);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700452
453abort:
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100454 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456}
457
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700458static struct buffer_head *udf_getblk(struct inode *inode, long block,
459 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460{
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700461 struct buffer_head *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 struct buffer_head dummy;
463
464 dummy.b_state = 0;
465 dummy.b_blocknr = -1000;
466 *err = udf_get_block(inode, block, &dummy, create);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700467 if (!*err && buffer_mapped(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700469 if (buffer_new(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 lock_buffer(bh);
471 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
472 set_buffer_uptodate(bh);
473 unlock_buffer(bh);
474 mark_buffer_dirty_inode(bh, inode);
475 }
476 return bh;
477 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700478
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 return NULL;
480}
481
Jan Kara31170b62007-05-08 00:35:21 -0700482/* Extend the file by 'blocks' blocks, return the number of extents added */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200483static int udf_do_extend_file(struct inode *inode,
484 struct extent_position *last_pos,
485 struct kernel_long_ad *last_ext,
486 sector_t blocks)
Jan Kara31170b62007-05-08 00:35:21 -0700487{
488 sector_t add;
489 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
490 struct super_block *sb = inode->i_sb;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200491 struct kernel_lb_addr prealloc_loc = {};
Jan Kara31170b62007-05-08 00:35:21 -0700492 int prealloc_len = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800493 struct udf_inode_info *iinfo;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200494 int err;
Jan Kara31170b62007-05-08 00:35:21 -0700495
496 /* The previous extent is fake and we should not extend by anything
497 * - there's nothing to do... */
498 if (!blocks && fake)
499 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700500
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800501 iinfo = UDF_I(inode);
Jan Kara31170b62007-05-08 00:35:21 -0700502 /* Round the last extent up to a multiple of block size */
503 if (last_ext->extLength & (sb->s_blocksize - 1)) {
504 last_ext->extLength =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700505 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
506 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
507 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800508 iinfo->i_lenExtents =
509 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700510 ~(sb->s_blocksize - 1);
Jan Kara31170b62007-05-08 00:35:21 -0700511 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700512
Jan Kara31170b62007-05-08 00:35:21 -0700513 /* Last extent are just preallocated blocks? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800514 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
515 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700516 /* Save the extent so that we can reattach it to the end */
517 prealloc_loc = last_ext->extLocation;
518 prealloc_len = last_ext->extLength;
519 /* Mark the extent as a hole */
520 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700521 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
Jan Kara31170b62007-05-08 00:35:21 -0700522 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800523 last_ext->extLocation.partitionReferenceNum = 0;
Jan Kara31170b62007-05-08 00:35:21 -0700524 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700525
Jan Kara31170b62007-05-08 00:35:21 -0700526 /* Can we merge with the previous extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800527 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
528 EXT_NOT_RECORDED_NOT_ALLOCATED) {
529 add = ((1 << 30) - sb->s_blocksize -
530 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
531 sb->s_blocksize_bits;
Jan Kara31170b62007-05-08 00:35:21 -0700532 if (add > blocks)
533 add = blocks;
534 blocks -= add;
535 last_ext->extLength += add << sb->s_blocksize_bits;
536 }
537
538 if (fake) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200539 udf_add_aext(inode, last_pos, &last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700540 last_ext->extLength, 1);
Jan Kara31170b62007-05-08 00:35:21 -0700541 count++;
Jan Kara6c371572015-12-23 18:05:03 +0100542 } else {
543 struct kernel_lb_addr tmploc;
544 uint32_t tmplen;
545
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);
Jan Kara6c371572015-12-23 18:05:03 +0100548 /*
549 * We've rewritten the last extent but there may be empty
550 * indirect extent after it - enter it.
551 */
552 udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
553 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700554
Jan Kara31170b62007-05-08 00:35:21 -0700555 /* Managed to do everything necessary? */
556 if (!blocks)
557 goto out;
558
559 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
560 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800561 last_ext->extLocation.partitionReferenceNum = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700562 add = (1 << (30-sb->s_blocksize_bits)) - 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800563 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
564 (add << sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700565
Jan Kara31170b62007-05-08 00:35:21 -0700566 /* Create enough extents to cover the whole hole */
567 while (blocks > add) {
568 blocks -= add;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200569 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
570 last_ext->extLength, 1);
571 if (err)
572 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700573 count++;
574 }
575 if (blocks) {
576 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700577 (blocks << sb->s_blocksize_bits);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200578 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
579 last_ext->extLength, 1);
580 if (err)
581 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700582 count++;
583 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700584
585out:
Jan Kara31170b62007-05-08 00:35:21 -0700586 /* Do we have some preallocated blocks saved? */
587 if (prealloc_len) {
Jan Kara7e49b6f2010-10-22 00:30:26 +0200588 err = udf_add_aext(inode, last_pos, &prealloc_loc,
589 prealloc_len, 1);
590 if (err)
591 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700592 last_ext->extLocation = prealloc_loc;
593 last_ext->extLength = prealloc_len;
594 count++;
595 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700596
Jan Kara31170b62007-05-08 00:35:21 -0700597 /* last_pos should point to the last written extent... */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800598 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200599 last_pos->offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800600 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200601 last_pos->offset -= sizeof(struct long_ad);
Jan Kara31170b62007-05-08 00:35:21 -0700602 else
Jan Kara7e49b6f2010-10-22 00:30:26 +0200603 return -EIO;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700604
Jan Kara31170b62007-05-08 00:35:21 -0700605 return count;
606}
607
Jan Kara7e49b6f2010-10-22 00:30:26 +0200608static int udf_extend_file(struct inode *inode, loff_t newsize)
609{
610
611 struct extent_position epos;
612 struct kernel_lb_addr eloc;
613 uint32_t elen;
614 int8_t etype;
615 struct super_block *sb = inode->i_sb;
616 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
617 int adsize;
618 struct udf_inode_info *iinfo = UDF_I(inode);
619 struct kernel_long_ad extent;
620 int err;
621
622 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
623 adsize = sizeof(struct short_ad);
624 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
625 adsize = sizeof(struct long_ad);
626 else
627 BUG();
628
629 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
630
631 /* File has extent covering the new size (could happen when extending
632 * inside a block)? */
633 if (etype != -1)
634 return 0;
635 if (newsize & (sb->s_blocksize - 1))
636 offset++;
637 /* Extended file just to the boundary of the last file block? */
638 if (offset == 0)
639 return 0;
640
641 /* Truncate is extending the file by 'offset' blocks */
642 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
643 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
644 /* File has no extents at all or has empty last
645 * indirect extent! Create a fake extent... */
646 extent.extLocation.logicalBlockNum = 0;
647 extent.extLocation.partitionReferenceNum = 0;
648 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
649 } else {
650 epos.offset -= adsize;
651 etype = udf_next_aext(inode, &epos, &extent.extLocation,
652 &extent.extLength, 0);
653 extent.extLength |= etype << 30;
654 }
655 err = udf_do_extend_file(inode, &epos, &extent, offset);
656 if (err < 0)
657 goto out;
658 err = 0;
659 iinfo->i_lenExtents = newsize;
660out:
661 brelse(epos.bh);
662 return err;
663}
664
Jan Kara7b0b0932011-12-10 01:43:33 +0100665static sector_t inode_getblk(struct inode *inode, sector_t block,
666 int *err, int *new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200668 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
Jan Karaff116fc2007-05-08 00:35:14 -0700669 struct extent_position prev_epos, cur_epos, next_epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 int count = 0, startnum = 0, endnum = 0;
Jan Kara85d71242007-06-01 00:46:29 -0700671 uint32_t elen = 0, tmpelen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200672 struct kernel_lb_addr eloc, tmpeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 int c = 1;
Jan Kara60448b12007-05-08 00:35:13 -0700674 loff_t lbcount = 0, b_off = 0;
675 uint32_t newblocknum, newblock;
676 sector_t offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800678 struct udf_inode_info *iinfo = UDF_I(inode);
679 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
Jan Kara31170b62007-05-08 00:35:21 -0700680 int lastblock = 0;
Namjae Jeonfb719c52012-10-10 00:09:12 +0900681 bool isBeyondEOF;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
Jan Kara7b0b0932011-12-10 01:43:33 +0100683 *err = 0;
684 *new = 0;
Jan Karaff116fc2007-05-08 00:35:14 -0700685 prev_epos.offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800686 prev_epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700687 prev_epos.bh = NULL;
688 cur_epos = next_epos = prev_epos;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700689 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
691 /* find the extent which contains the block we are looking for.
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700692 alternate between laarr[0] and laarr[1] for locations of the
693 current extent, and the previous extent */
694 do {
695 if (prev_epos.bh != cur_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700696 brelse(prev_epos.bh);
697 get_bh(cur_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700698 prev_epos.bh = cur_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700700 if (cur_epos.bh != next_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700701 brelse(cur_epos.bh);
702 get_bh(next_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700703 cur_epos.bh = next_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 }
705
706 lbcount += elen;
707
Jan Karaff116fc2007-05-08 00:35:14 -0700708 prev_epos.block = cur_epos.block;
709 cur_epos.block = next_epos.block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
Jan Karaff116fc2007-05-08 00:35:14 -0700711 prev_epos.offset = cur_epos.offset;
712 cur_epos.offset = next_epos.offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
Marcin Slusarz4b111112008-02-08 04:20:36 -0800714 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
715 if (etype == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 break;
717
718 c = !c;
719
720 laarr[c].extLength = (etype << 30) | elen;
721 laarr[c].extLocation = eloc;
722
723 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
724 pgoal = eloc.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700725 ((elen + inode->i_sb->s_blocksize - 1) >>
726 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700728 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 } while (lbcount + elen <= b_off);
730
731 b_off -= lbcount;
732 offset = b_off >> inode->i_sb->s_blocksize_bits;
Jan Kara85d71242007-06-01 00:46:29 -0700733 /*
734 * Move prev_epos and cur_epos into indirect extent if we are at
735 * the pointer to it
736 */
737 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
738 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
740 /* if the extent is allocated and recorded, return the block
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700741 if the extent is not a multiple of the blocksize, round up */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700743 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
744 if (elen & (inode->i_sb->s_blocksize - 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 elen = EXT_RECORDED_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700746 ((elen + inode->i_sb->s_blocksize - 1) &
747 ~(inode->i_sb->s_blocksize - 1));
Jan Kara7e49b6f2010-10-22 00:30:26 +0200748 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 }
Jan Kara3bf25cb2007-05-08 00:35:16 -0700750 brelse(prev_epos.bh);
751 brelse(cur_epos.bh);
752 brelse(next_epos.bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200753 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
Jan Kara7b0b0932011-12-10 01:43:33 +0100754 return newblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 }
756
Jan Kara31170b62007-05-08 00:35:21 -0700757 /* Are we beyond EOF? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700758 if (etype == -1) {
Jan Kara31170b62007-05-08 00:35:21 -0700759 int ret;
Fabian Frederick69814982015-02-04 18:26:27 +0100760 isBeyondEOF = true;
Jan Kara31170b62007-05-08 00:35:21 -0700761 if (count) {
762 if (c)
763 laarr[0] = laarr[1];
764 startnum = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700765 } else {
Jan Kara31170b62007-05-08 00:35:21 -0700766 /* Create a fake extent when there's not one */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800767 memset(&laarr[0].extLocation, 0x00,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200768 sizeof(struct kernel_lb_addr));
Jan Kara31170b62007-05-08 00:35:21 -0700769 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200770 /* Will udf_do_extend_file() create real extent from
Marcin Slusarz4b111112008-02-08 04:20:36 -0800771 a fake one? */
Jan Kara31170b62007-05-08 00:35:21 -0700772 startnum = (offset > 0);
773 }
774 /* Create extents for the hole between EOF and offset */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200775 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
776 if (ret < 0) {
Jan Kara31170b62007-05-08 00:35:21 -0700777 brelse(prev_epos.bh);
778 brelse(cur_epos.bh);
779 brelse(next_epos.bh);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200780 *err = ret;
Jan Kara7b0b0932011-12-10 01:43:33 +0100781 return 0;
Jan Kara31170b62007-05-08 00:35:21 -0700782 }
783 c = 0;
784 offset = 0;
785 count += ret;
786 /* We are not covered by a preallocated extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800787 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
788 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700789 /* Is there any real extent? - otherwise we overwrite
790 * the fake one... */
791 if (count)
792 c = !c;
793 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700794 inode->i_sb->s_blocksize;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800795 memset(&laarr[c].extLocation, 0x00,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200796 sizeof(struct kernel_lb_addr));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700797 count++;
Jan Kara31170b62007-05-08 00:35:21 -0700798 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700799 endnum = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 lastblock = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700801 } else {
Fabian Frederick69814982015-02-04 18:26:27 +0100802 isBeyondEOF = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 endnum = startnum = ((count > 2) ? 2 : count);
804
Marcin Slusarz4b111112008-02-08 04:20:36 -0800805 /* if the current extent is in position 0,
806 swap it with the previous */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700807 if (!c && count != 1) {
Jan Kara31170b62007-05-08 00:35:21 -0700808 laarr[2] = laarr[0];
809 laarr[0] = laarr[1];
810 laarr[1] = laarr[2];
811 c = 1;
812 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Marcin Slusarz4b111112008-02-08 04:20:36 -0800814 /* if the current block is located in an extent,
815 read the next extent */
816 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
817 if (etype != -1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700818 laarr[c + 1].extLength = (etype << 30) | elen;
819 laarr[c + 1].extLocation = eloc;
820 count++;
821 startnum++;
822 endnum++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800823 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 lastblock = 1;
825 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
827 /* if the current extent is not recorded but allocated, get the
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700828 * block in the extent corresponding to the requested block */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800829 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800831 else { /* otherwise, allocate a new block */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800832 if (iinfo->i_next_alloc_block == block)
833 goal = iinfo->i_next_alloc_goal;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700835 if (!goal) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800836 if (!(goal = pgoal)) /* XXX: what was intended here? */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800837 goal = iinfo->i_location.logicalBlockNum + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 }
839
Marcin Slusarz4b111112008-02-08 04:20:36 -0800840 newblocknum = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800841 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800842 goal, err);
843 if (!newblocknum) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700844 brelse(prev_epos.bh);
Namjae Jeon2fb7d992012-10-10 00:08:56 +0900845 brelse(cur_epos.bh);
846 brelse(next_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 *err = -ENOSPC;
Jan Kara7b0b0932011-12-10 01:43:33 +0100848 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 }
Namjae Jeonfb719c52012-10-10 00:09:12 +0900850 if (isBeyondEOF)
851 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 }
853
Marcin Slusarz4b111112008-02-08 04:20:36 -0800854 /* if the extent the requsted block is located in contains multiple
855 * blocks, split the extent into at most three extents. blocks prior
856 * to requested block, requested block, and blocks after requested
857 * block */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
859
860#ifdef UDF_PREALLOCATE
Jan Kara81056dd2009-07-16 18:02:25 +0200861 /* We preallocate blocks only for regular files. It also makes sense
862 * for directories but there's a problem when to drop the
863 * preallocation. We might use some delayed work for that but I feel
864 * it's overengineering for a filesystem like UDF. */
865 if (S_ISREG(inode->i_mode))
866 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867#endif
868
869 /* merge any continuous blocks in laarr */
870 udf_merge_extents(inode, laarr, &endnum);
871
872 /* write back the new extents, inserting new extents if the new number
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700873 * of extents is greater than the old number, and deleting extents if
874 * the new number of extents is less than the old number */
Jan Karaff116fc2007-05-08 00:35:14 -0700875 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
Jan Kara3bf25cb2007-05-08 00:35:16 -0700877 brelse(prev_epos.bh);
Namjae Jeon2fb7d992012-10-10 00:08:56 +0900878 brelse(cur_epos.bh);
879 brelse(next_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
Marcin Slusarz4b111112008-02-08 04:20:36 -0800881 newblock = udf_get_pblock(inode->i_sb, newblocknum,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800882 iinfo->i_location.partitionReferenceNum, 0);
Jan Kara7b0b0932011-12-10 01:43:33 +0100883 if (!newblock) {
884 *err = -EIO;
885 return 0;
886 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 *new = 1;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800888 iinfo->i_next_alloc_block = block;
889 iinfo->i_next_alloc_goal = newblocknum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 inode->i_ctime = current_fs_time(inode->i_sb);
891
892 if (IS_SYNC(inode))
893 udf_sync_inode(inode);
894 else
895 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700896
Jan Kara7b0b0932011-12-10 01:43:33 +0100897 return newblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898}
899
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700900static void udf_split_extents(struct inode *inode, int *c, int offset,
901 int newblocknum,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200902 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700903 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800905 unsigned long blocksize = inode->i_sb->s_blocksize;
906 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
907
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
Marcin Slusarz4b111112008-02-08 04:20:36 -0800909 (laarr[*c].extLength >> 30) ==
910 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 int curr = *c;
912 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800913 blocksize - 1) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 int8_t etype = (laarr[curr].extLength >> 30);
915
Marcin Slusarz4b111112008-02-08 04:20:36 -0800916 if (blen == 1)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700917 ;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800918 else if (!offset || blen == offset + 1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700919 laarr[curr + 2] = laarr[curr + 1];
920 laarr[curr + 1] = laarr[curr];
921 } else {
922 laarr[curr + 3] = laarr[curr + 1];
923 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 }
925
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700926 if (offset) {
927 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800928 udf_free_blocks(inode->i_sb, inode,
Pekka Enberg97e961f2008-10-15 12:29:03 +0200929 &laarr[curr].extLocation,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800930 0, offset);
931 laarr[curr].extLength =
932 EXT_NOT_RECORDED_NOT_ALLOCATED |
933 (offset << blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 laarr[curr].extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800935 laarr[curr].extLocation.
936 partitionReferenceNum = 0;
937 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800939 (offset << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700940 curr++;
941 (*c)++;
942 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -0700944
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 laarr[curr].extLocation.logicalBlockNum = newblocknum;
946 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
947 laarr[curr].extLocation.partitionReferenceNum =
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800948 UDF_I(inode)->i_location.partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800950 blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700951 curr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700953 if (blen != offset + 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800955 laarr[curr].extLocation.logicalBlockNum +=
956 offset + 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700957 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800958 ((blen - (offset + 1)) << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700959 curr++;
960 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 }
962 }
963}
964
965static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200966 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700967 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968{
969 int start, length = 0, currlength = 0, i;
970
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700971 if (*endnum >= (c + 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 if (!lastblock)
973 return;
974 else
975 start = c;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700976 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800977 if ((laarr[c + 1].extLength >> 30) ==
978 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700979 start = c + 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800980 length = currlength =
981 (((laarr[c + 1].extLength &
982 UDF_EXTENT_LENGTH_MASK) +
983 inode->i_sb->s_blocksize - 1) >>
984 inode->i_sb->s_blocksize_bits);
985 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 start = c;
987 }
988
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700989 for (i = start + 1; i <= *endnum; i++) {
990 if (i == *endnum) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 if (lastblock)
992 length += UDF_DEFAULT_PREALLOC_BLOCKS;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800993 } else if ((laarr[i].extLength >> 30) ==
994 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
995 length += (((laarr[i].extLength &
996 UDF_EXTENT_LENGTH_MASK) +
997 inode->i_sb->s_blocksize - 1) >>
998 inode->i_sb->s_blocksize_bits);
999 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 break;
1001 }
1002
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001003 if (length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 int next = laarr[start].extLocation.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001005 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -08001006 inode->i_sb->s_blocksize - 1) >>
1007 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001009 laarr[start].extLocation.partitionReferenceNum,
1010 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
1011 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
1012 currlength);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001013 if (numalloc) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001014 if (start == (c + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 laarr[start].extLength +=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001016 (numalloc <<
1017 inode->i_sb->s_blocksize_bits);
1018 else {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001019 memmove(&laarr[c + 2], &laarr[c + 1],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001020 sizeof(struct long_ad) * (*endnum - (c + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001021 (*endnum)++;
1022 laarr[c + 1].extLocation.logicalBlockNum = next;
1023 laarr[c + 1].extLocation.partitionReferenceNum =
Marcin Slusarz4b111112008-02-08 04:20:36 -08001024 laarr[c].extLocation.
1025 partitionReferenceNum;
1026 laarr[c + 1].extLength =
1027 EXT_NOT_RECORDED_ALLOCATED |
1028 (numalloc <<
1029 inode->i_sb->s_blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001030 start = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 }
1032
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001033 for (i = start + 1; numalloc && i < *endnum; i++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001034 int elen = ((laarr[i].extLength &
1035 UDF_EXTENT_LENGTH_MASK) +
1036 inode->i_sb->s_blocksize - 1) >>
1037 inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001039 if (elen > numalloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 laarr[i].extLength -=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001041 (numalloc <<
1042 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 numalloc = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001044 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 numalloc -= elen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001046 if (*endnum > (i + 1))
Marcin Slusarz4b111112008-02-08 04:20:36 -08001047 memmove(&laarr[i],
1048 &laarr[i + 1],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001049 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001050 (*endnum - (i + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001051 i--;
1052 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 }
1054 }
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001055 UDF_I(inode)->i_lenExtents +=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001056 numalloc << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 }
1058 }
1059}
1060
1061static void udf_merge_extents(struct inode *inode,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001062 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001063 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064{
1065 int i;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001066 unsigned long blocksize = inode->i_sb->s_blocksize;
1067 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001069 for (i = 0; i < (*endnum - 1); i++) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001070 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
1071 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
Marcin Slusarz4b111112008-02-08 04:20:36 -08001073 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
1074 (((li->extLength >> 30) ==
1075 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1076 ((lip1->extLocation.logicalBlockNum -
1077 li->extLocation.logicalBlockNum) ==
1078 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1079 blocksize - 1) >> blocksize_bits)))) {
1080
1081 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1082 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1083 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1084 lip1->extLength = (lip1->extLength -
1085 (li->extLength &
1086 UDF_EXTENT_LENGTH_MASK) +
1087 UDF_EXTENT_LENGTH_MASK) &
1088 ~(blocksize - 1);
1089 li->extLength = (li->extLength &
1090 UDF_EXTENT_FLAG_MASK) +
1091 (UDF_EXTENT_LENGTH_MASK + 1) -
1092 blocksize;
1093 lip1->extLocation.logicalBlockNum =
1094 li->extLocation.logicalBlockNum +
1095 ((li->extLength &
1096 UDF_EXTENT_LENGTH_MASK) >>
1097 blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001098 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001099 li->extLength = lip1->extLength +
1100 (((li->extLength &
1101 UDF_EXTENT_LENGTH_MASK) +
1102 blocksize - 1) & ~(blocksize - 1));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001103 if (*endnum > (i + 2))
1104 memmove(&laarr[i + 1], &laarr[i + 2],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001105 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001106 (*endnum - (i + 2)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001107 i--;
1108 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001110 } else if (((li->extLength >> 30) ==
1111 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1112 ((lip1->extLength >> 30) ==
1113 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02001114 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001115 ((li->extLength &
1116 UDF_EXTENT_LENGTH_MASK) +
1117 blocksize - 1) >> blocksize_bits);
1118 li->extLocation.logicalBlockNum = 0;
1119 li->extLocation.partitionReferenceNum = 0;
1120
1121 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1122 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1123 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1124 lip1->extLength = (lip1->extLength -
1125 (li->extLength &
1126 UDF_EXTENT_LENGTH_MASK) +
1127 UDF_EXTENT_LENGTH_MASK) &
1128 ~(blocksize - 1);
1129 li->extLength = (li->extLength &
1130 UDF_EXTENT_FLAG_MASK) +
1131 (UDF_EXTENT_LENGTH_MASK + 1) -
1132 blocksize;
1133 } else {
1134 li->extLength = lip1->extLength +
1135 (((li->extLength &
1136 UDF_EXTENT_LENGTH_MASK) +
1137 blocksize - 1) & ~(blocksize - 1));
1138 if (*endnum > (i + 2))
1139 memmove(&laarr[i + 1], &laarr[i + 2],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001140 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001141 (*endnum - (i + 2)));
1142 i--;
1143 (*endnum)--;
1144 }
1145 } else if ((li->extLength >> 30) ==
1146 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1147 udf_free_blocks(inode->i_sb, inode,
Pekka Enberg97e961f2008-10-15 12:29:03 +02001148 &li->extLocation, 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001149 ((li->extLength &
1150 UDF_EXTENT_LENGTH_MASK) +
1151 blocksize - 1) >> blocksize_bits);
1152 li->extLocation.logicalBlockNum = 0;
1153 li->extLocation.partitionReferenceNum = 0;
1154 li->extLength = (li->extLength &
1155 UDF_EXTENT_LENGTH_MASK) |
1156 EXT_NOT_RECORDED_NOT_ALLOCATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 }
1158 }
1159}
1160
1161static void udf_update_extents(struct inode *inode,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001162 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001163 int startnum, int endnum,
1164 struct extent_position *epos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165{
1166 int start = 0, i;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001167 struct kernel_lb_addr tmploc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 uint32_t tmplen;
1169
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001170 if (startnum > endnum) {
1171 for (i = 0; i < (startnum - endnum); i++)
Jan Karaff116fc2007-05-08 00:35:14 -07001172 udf_delete_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001173 laarr[i].extLength);
1174 } else if (startnum < endnum) {
1175 for (i = 0; i < (endnum - startnum); i++) {
Jan Karaff116fc2007-05-08 00:35:14 -07001176 udf_insert_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001177 laarr[i].extLength);
Jan Karaff116fc2007-05-08 00:35:14 -07001178 udf_next_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001179 &laarr[i].extLength, 1);
1180 start++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 }
1182 }
1183
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001184 for (i = start; i < endnum; i++) {
Jan Karaff116fc2007-05-08 00:35:14 -07001185 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001186 udf_write_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001187 laarr[i].extLength, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 }
1189}
1190
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001191struct buffer_head *udf_bread(struct inode *inode, int block,
1192 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001194 struct buffer_head *bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195
1196 bh = udf_getblk(inode, block, create, err);
1197 if (!bh)
1198 return NULL;
1199
1200 if (buffer_uptodate(bh))
1201 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001202
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 ll_rw_block(READ, 1, &bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001204
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 wait_on_buffer(bh);
1206 if (buffer_uptodate(bh))
1207 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001208
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 brelse(bh);
1210 *err = -EIO;
1211 return NULL;
1212}
1213
Jan Kara7e49b6f2010-10-22 00:30:26 +02001214int udf_setsize(struct inode *inode, loff_t newsize)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001217 struct udf_inode_info *iinfo;
Jan Kara7e49b6f2010-10-22 00:30:26 +02001218 int bsize = 1 << inode->i_blkbits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219
1220 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001221 S_ISLNK(inode->i_mode)))
Jan Kara7e49b6f2010-10-22 00:30:26 +02001222 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
Jan Kara7e49b6f2010-10-22 00:30:26 +02001224 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001226 iinfo = UDF_I(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001227 if (newsize > inode->i_size) {
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001228 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001229 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1230 if (bsize <
1231 (udf_file_entry_alloc_offset(inode) + newsize)) {
1232 err = udf_expand_file_adinicb(inode);
Jan Karad2eb8c32011-12-10 02:30:48 +01001233 if (err)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001234 return err;
Jan Karad2eb8c32011-12-10 02:30:48 +01001235 down_write(&iinfo->i_data_sem);
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001236 } else {
Jan Kara7e49b6f2010-10-22 00:30:26 +02001237 iinfo->i_lenAlloc = newsize;
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001238 goto set_size;
1239 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 }
Jan Kara7e49b6f2010-10-22 00:30:26 +02001241 err = udf_extend_file(inode, newsize);
1242 if (err) {
1243 up_write(&iinfo->i_data_sem);
1244 return err;
1245 }
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001246set_size:
Jan Kara7e49b6f2010-10-22 00:30:26 +02001247 truncate_setsize(inode, newsize);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001248 up_write(&iinfo->i_data_sem);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001249 } else {
Jan Kara7e49b6f2010-10-22 00:30:26 +02001250 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1251 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +09001252 udf_clear_extent_cache(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001253 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1254 0x00, bsize - newsize -
1255 udf_file_entry_alloc_offset(inode));
1256 iinfo->i_lenAlloc = newsize;
1257 truncate_setsize(inode, newsize);
1258 up_write(&iinfo->i_data_sem);
1259 goto update_time;
1260 }
1261 err = block_truncate_page(inode->i_mapping, newsize,
1262 udf_get_block);
1263 if (err)
1264 return err;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001265 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +09001266 udf_clear_extent_cache(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001267 truncate_setsize(inode, newsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 udf_truncate_extents(inode);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001269 up_write(&iinfo->i_data_sem);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001270 }
Jan Kara7e49b6f2010-10-22 00:30:26 +02001271update_time:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1273 if (IS_SYNC(inode))
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001274 udf_sync_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 else
1276 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001277 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278}
1279
Jan Karac03aa9f2014-09-04 14:06:55 +02001280/*
1281 * Maximum length of linked list formed by ICB hierarchy. The chosen number is
1282 * arbitrary - just that we hopefully don't limit any real use of rewritten
1283 * inode on write-once media but avoid looping for too long on corrupted media.
1284 */
1285#define UDF_MAX_ICB_NESTING 1024
1286
Jan Kara6174c2e2014-10-09 12:52:16 +02001287static int udf_read_inode(struct inode *inode, bool hidden_inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288{
1289 struct buffer_head *bh = NULL;
1290 struct fileEntry *fe;
Jan Karabb7720a02014-09-04 13:32:50 +02001291 struct extendedFileEntry *efe;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 uint16_t ident;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001293 struct udf_inode_info *iinfo = UDF_I(inode);
Jan Karabb7720a02014-09-04 13:32:50 +02001294 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001295 struct kernel_lb_addr *iloc = &iinfo->i_location;
Jan Karabb7720a02014-09-04 13:32:50 +02001296 unsigned int link_count;
Jan Karac03aa9f2014-09-04 14:06:55 +02001297 unsigned int indirections = 0;
Jan Kara79144952015-01-07 13:46:16 +01001298 int bs = inode->i_sb->s_blocksize;
Jan Kara6d3d5e82014-09-04 16:15:51 +02001299 int ret = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300
Jan Karac03aa9f2014-09-04 14:06:55 +02001301reread:
Jan Kara6d3d5e82014-09-04 16:15:51 +02001302 if (iloc->logicalBlockNum >=
1303 sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) {
1304 udf_debug("block=%d, partition=%d out of range\n",
1305 iloc->logicalBlockNum, iloc->partitionReferenceNum);
1306 return -EIO;
1307 }
1308
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 /*
1310 * Set defaults, but the inode is still incomplete!
1311 * Note: get_new_inode() sets the following on a new inode:
1312 * i_sb = sb
1313 * i_no = ino
1314 * i_flags = sb->s_flags
1315 * i_state = 0
1316 * clean_inode(): zero fills and sets
1317 * i_count = 1
1318 * i_nlink = 1
1319 * i_op = NULL;
1320 */
Jan Kara6d3d5e82014-09-04 16:15:51 +02001321 bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001322 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07001323 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001324 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 }
1326
1327 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001328 ident != TAG_IDENT_USE) {
Joe Perches78ace702011-10-10 01:08:05 -07001329 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1330 inode->i_ino, ident);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001331 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 }
1333
1334 fe = (struct fileEntry *)bh->b_data;
Jan Karabb7720a02014-09-04 13:32:50 +02001335 efe = (struct extendedFileEntry *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001337 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001338 struct buffer_head *ibh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339
Jan Kara6d3d5e82014-09-04 16:15:51 +02001340 ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001341 if (ident == TAG_IDENT_IE && ibh) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001342 struct kernel_lb_addr loc;
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001343 struct indirectEntry *ie;
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001344
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001345 ie = (struct indirectEntry *)ibh->b_data;
1346 loc = lelb_to_cpu(ie->indirectICB.extLocation);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001347
Jan Karac03aa9f2014-09-04 14:06:55 +02001348 if (ie->indirectICB.extLength) {
Jan Karac03aa9f2014-09-04 14:06:55 +02001349 brelse(ibh);
1350 memcpy(&iinfo->i_location, &loc,
1351 sizeof(struct kernel_lb_addr));
1352 if (++indirections > UDF_MAX_ICB_NESTING) {
1353 udf_err(inode->i_sb,
1354 "too many ICBs in ICB hierarchy"
1355 " (max %d supported)\n",
1356 UDF_MAX_ICB_NESTING);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001357 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001358 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001359 brelse(bh);
Jan Karac03aa9f2014-09-04 14:06:55 +02001360 goto reread;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001362 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001363 brelse(ibh);
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001364 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
Joe Perches78ace702011-10-10 01:08:05 -07001365 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1366 le16_to_cpu(fe->icbTag.strategyType));
Jan Kara6d3d5e82014-09-04 16:15:51 +02001367 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 }
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001369 if (fe->icbTag.strategyType == cpu_to_le16(4))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001370 iinfo->i_strat4096 = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001371 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001372 iinfo->i_strat4096 = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001374 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
Marcin Slusarz4b111112008-02-08 04:20:36 -08001375 ICBTAG_FLAG_AD_MASK;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001376 iinfo->i_unique = 0;
1377 iinfo->i_lenEAttr = 0;
1378 iinfo->i_lenExtents = 0;
1379 iinfo->i_lenAlloc = 0;
1380 iinfo->i_next_alloc_block = 0;
1381 iinfo->i_next_alloc_goal = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001382 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001383 iinfo->i_efe = 1;
1384 iinfo->i_use = 0;
Jan Kara79144952015-01-07 13:46:16 +01001385 ret = udf_alloc_i_data(inode, bs -
Jan Kara6d3d5e82014-09-04 16:15:51 +02001386 sizeof(struct extendedFileEntry));
1387 if (ret)
1388 goto out;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001389 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001390 bh->b_data + sizeof(struct extendedFileEntry),
Jan Kara79144952015-01-07 13:46:16 +01001391 bs - sizeof(struct extendedFileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001392 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001393 iinfo->i_efe = 0;
1394 iinfo->i_use = 0;
Jan Kara79144952015-01-07 13:46:16 +01001395 ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry));
Jan Kara6d3d5e82014-09-04 16:15:51 +02001396 if (ret)
1397 goto out;
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),
Jan Kara79144952015-01-07 13:46:16 +01001400 bs - 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);
Jan Kara79144952015-01-07 13:46:16 +01001407 ret = udf_alloc_i_data(inode, bs -
Jan Kara6d3d5e82014-09-04 16:15:51 +02001408 sizeof(struct unallocSpaceEntry));
1409 if (ret)
1410 goto out;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001411 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001412 bh->b_data + sizeof(struct unallocSpaceEntry),
Jan Kara79144952015-01-07 13:46:16 +01001413 bs - sizeof(struct unallocSpaceEntry));
Jan Kara6d3d5e82014-09-04 16:15:51 +02001414 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 }
1416
Jan Kara6d3d5e82014-09-04 16:15:51 +02001417 ret = -EIO;
Jan Karac03cad22010-10-20 22:17:28 +02001418 read_lock(&sbi->s_cred_lock);
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001419 i_uid_write(inode, le32_to_cpu(fe->uid));
1420 if (!uid_valid(inode->i_uid) ||
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001421 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1422 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001423 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001425 i_gid_write(inode, le32_to_cpu(fe->gid));
1426 if (!gid_valid(inode->i_gid) ||
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001427 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1428 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001429 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001431 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001432 sbi->s_fmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001433 inode->i_mode = sbi->s_fmode;
1434 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001435 sbi->s_dmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001436 inode->i_mode = sbi->s_dmode;
1437 else
1438 inode->i_mode = udf_convert_permissions(fe);
1439 inode->i_mode &= ~sbi->s_umask;
Jan Karac03cad22010-10-20 22:17:28 +02001440 read_unlock(&sbi->s_cred_lock);
1441
Miklos Szeredibfe86842011-10-28 14:13:29 +02001442 link_count = le16_to_cpu(fe->fileLinkCount);
Jan Kara4071b912014-09-04 16:19:47 +02001443 if (!link_count) {
Jan Kara6174c2e2014-10-09 12:52:16 +02001444 if (!hidden_inode) {
1445 ret = -ESTALE;
1446 goto out;
1447 }
1448 link_count = 1;
Jan Kara4071b912014-09-04 16:19:47 +02001449 }
Miklos Szeredibfe86842011-10-28 14:13:29 +02001450 set_nlink(inode, link_count);
Jan Karac03cad22010-10-20 22:17:28 +02001451
1452 inode->i_size = le64_to_cpu(fe->informationLength);
1453 iinfo->i_lenExtents = inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001455 if (iinfo->i_efe == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001457 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
Marcin Slusarz56774802008-02-10 11:25:31 +01001459 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001460 inode->i_atime = sbi->s_record_time;
1461
Marcin Slusarz56774802008-02-10 11:25:31 +01001462 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1463 fe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001464 inode->i_mtime = sbi->s_record_time;
1465
Marcin Slusarz56774802008-02-10 11:25:31 +01001466 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001467 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001469 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1470 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1471 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001472 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001473 } else {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001474 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001475 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476
Marcin Slusarz56774802008-02-10 11:25:31 +01001477 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001478 inode->i_atime = sbi->s_record_time;
1479
Marcin Slusarz56774802008-02-10 11:25:31 +01001480 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1481 efe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001482 inode->i_mtime = sbi->s_record_time;
1483
Marcin Slusarz56774802008-02-10 11:25:31 +01001484 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001485 iinfo->i_crtime = sbi->s_record_time;
1486
Marcin Slusarz56774802008-02-10 11:25:31 +01001487 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001488 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001490 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1491 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1492 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001493 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 }
Jan Kara470cca52014-09-04 16:26:19 +02001495 inode->i_generation = iinfo->i_unique;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496
Jan Kara23b133bd2015-01-07 13:49:08 +01001497 /*
1498 * Sanity check length of allocation descriptors and extended attrs to
1499 * avoid integer overflows
1500 */
1501 if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs)
1502 goto out;
1503 /* Now do exact checks */
1504 if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs)
1505 goto out;
Jan Karae1593322014-12-19 12:03:53 +01001506 /* Sanity checks for files in ICB so that we don't get confused later */
1507 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1508 /*
1509 * For file in ICB data is stored in allocation descriptor
1510 * so sizes should match
1511 */
1512 if (iinfo->i_lenAlloc != inode->i_size)
1513 goto out;
1514 /* File in ICB has to fit in there... */
Jan Kara79144952015-01-07 13:46:16 +01001515 if (inode->i_size > bs - udf_file_entry_alloc_offset(inode))
Jan Karae1593322014-12-19 12:03:53 +01001516 goto out;
1517 }
1518
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001519 switch (fe->icbTag.fileType) {
1520 case ICBTAG_FILE_TYPE_DIRECTORY:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001521 inode->i_op = &udf_dir_inode_operations;
1522 inode->i_fop = &udf_dir_operations;
1523 inode->i_mode |= S_IFDIR;
1524 inc_nlink(inode);
1525 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001526 case ICBTAG_FILE_TYPE_REALTIME:
1527 case ICBTAG_FILE_TYPE_REGULAR:
1528 case ICBTAG_FILE_TYPE_UNDEF:
Jan Kara742e1792008-04-08 01:17:52 +02001529 case ICBTAG_FILE_TYPE_VAT20:
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001530 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001531 inode->i_data.a_ops = &udf_adinicb_aops;
1532 else
1533 inode->i_data.a_ops = &udf_aops;
1534 inode->i_op = &udf_file_inode_operations;
1535 inode->i_fop = &udf_file_operations;
1536 inode->i_mode |= S_IFREG;
1537 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001538 case ICBTAG_FILE_TYPE_BLOCK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001539 inode->i_mode |= S_IFBLK;
1540 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001541 case ICBTAG_FILE_TYPE_CHAR:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001542 inode->i_mode |= S_IFCHR;
1543 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001544 case ICBTAG_FILE_TYPE_FIFO:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001545 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1546 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001547 case ICBTAG_FILE_TYPE_SOCKET:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001548 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1549 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001550 case ICBTAG_FILE_TYPE_SYMLINK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001551 inode->i_data.a_ops = &udf_symlink_aops;
Al Viroc73119c2015-11-13 20:33:18 -05001552 inode->i_op = &page_symlink_inode_operations;
Al Viro21fc61c2015-11-17 01:07:57 -05001553 inode_nohighmem(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001554 inode->i_mode = S_IFLNK | S_IRWXUGO;
1555 break;
Jan Karabfb257a2008-04-08 20:37:21 +02001556 case ICBTAG_FILE_TYPE_MAIN:
1557 udf_debug("METADATA FILE-----\n");
1558 break;
1559 case ICBTAG_FILE_TYPE_MIRROR:
1560 udf_debug("METADATA MIRROR FILE-----\n");
1561 break;
1562 case ICBTAG_FILE_TYPE_BITMAP:
1563 udf_debug("METADATA BITMAP FILE-----\n");
1564 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001565 default:
Joe Perches78ace702011-10-10 01:08:05 -07001566 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1567 inode->i_ino, fe->icbTag.fileType);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001568 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001570 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001571 struct deviceSpec *dsea =
1572 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001573 if (dsea) {
1574 init_special_inode(inode, inode->i_mode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001575 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1576 le32_to_cpu(dsea->minorDeviceIdent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 /* Developer ID ??? */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001578 } else
Jan Kara6d3d5e82014-09-04 16:15:51 +02001579 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001581 ret = 0;
1582out:
Jan Karabb7720a02014-09-04 13:32:50 +02001583 brelse(bh);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001584 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585}
1586
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001587static int udf_alloc_i_data(struct inode *inode, size_t size)
1588{
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001589 struct udf_inode_info *iinfo = UDF_I(inode);
1590 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001591
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001592 if (!iinfo->i_ext.i_data) {
Joe Perches78ace702011-10-10 01:08:05 -07001593 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1594 inode->i_ino);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001595 return -ENOMEM;
1596 }
1597
1598 return 0;
1599}
1600
Al Virofaa17292011-07-26 03:18:29 -04001601static umode_t udf_convert_permissions(struct fileEntry *fe)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602{
Al Virofaa17292011-07-26 03:18:29 -04001603 umode_t mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 uint32_t permissions;
1605 uint32_t flags;
1606
1607 permissions = le32_to_cpu(fe->permissions);
1608 flags = le16_to_cpu(fe->icbTag.flags);
1609
Marcin Slusarz4b111112008-02-08 04:20:36 -08001610 mode = ((permissions) & S_IRWXO) |
1611 ((permissions >> 2) & S_IRWXG) |
1612 ((permissions >> 4) & S_IRWXU) |
1613 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1614 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1615 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
1617 return mode;
1618}
1619
Christoph Hellwiga9185b42010-03-05 09:21:37 +01001620int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621{
Jan Kara49521de2010-10-20 17:42:44 +02001622 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623}
1624
Jan Kara49521de2010-10-20 17:42:44 +02001625static int udf_sync_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626{
1627 return udf_update_inode(inode, 1);
1628}
1629
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001630static int udf_update_inode(struct inode *inode, int do_sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631{
1632 struct buffer_head *bh = NULL;
1633 struct fileEntry *fe;
1634 struct extendedFileEntry *efe;
Steve Nickelb2527bf2012-02-16 12:53:53 -05001635 uint64_t lb_recorded;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 uint32_t udfperms;
1637 uint16_t icbflags;
1638 uint16_t crclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 int err = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001640 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001641 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001642 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643
Jan Kara5833ded2010-01-08 16:52:59 +01001644 bh = udf_tgetblk(inode->i_sb,
1645 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001646 if (!bh) {
Jan Karaaae917c2010-01-08 16:46:29 +01001647 udf_debug("getblk failure\n");
Changwoo Min0fd2ba32015-03-22 19:17:49 -04001648 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 }
1650
Jan Karaaae917c2010-01-08 16:46:29 +01001651 lock_buffer(bh);
1652 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 fe = (struct fileEntry *)bh->b_data;
1654 efe = (struct extendedFileEntry *)bh->b_data;
1655
Jan Karaaae917c2010-01-08 16:46:29 +01001656 if (iinfo->i_use) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 struct unallocSpaceEntry *use =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001658 (struct unallocSpaceEntry *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001660 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001661 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001662 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001663 sizeof(struct unallocSpaceEntry));
Jan Karaaae917c2010-01-08 16:46:29 +01001664 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
Steven J. Magnani70f19f52015-07-07 13:06:05 -05001665 crclen = sizeof(struct unallocSpaceEntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666
Steven J. Magnani70f19f52015-07-07 13:06:05 -05001667 goto finish;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 }
1669
Phillip Susi4d6660e2006-03-07 21:55:24 -08001670 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1671 fe->uid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001672 else
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001673 fe->uid = cpu_to_le32(i_uid_read(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674
Phillip Susi4d6660e2006-03-07 21:55:24 -08001675 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1676 fe->gid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001677 else
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001678 fe->gid = cpu_to_le32(i_gid_read(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679
Marcin Slusarz4b111112008-02-08 04:20:36 -08001680 udfperms = ((inode->i_mode & S_IRWXO)) |
1681 ((inode->i_mode & S_IRWXG) << 2) |
1682 ((inode->i_mode & S_IRWXU) << 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683
Marcin Slusarz4b111112008-02-08 04:20:36 -08001684 udfperms |= (le32_to_cpu(fe->permissions) &
1685 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1686 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1687 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 fe->permissions = cpu_to_le32(udfperms);
1689
Jan Kara8a70ee32014-09-04 11:47:51 +02001690 if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1692 else
1693 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1694
1695 fe->informationLength = cpu_to_le64(inode->i_size);
1696
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001697 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001698 struct regid *eid;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001699 struct deviceSpec *dsea =
1700 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001701 if (!dsea) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 dsea = (struct deviceSpec *)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001703 udf_add_extendedattr(inode,
1704 sizeof(struct deviceSpec) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001705 sizeof(struct regid), 12, 0x3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 dsea->attrType = cpu_to_le32(12);
1707 dsea->attrSubtype = 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001708 dsea->attrLength = cpu_to_le32(
1709 sizeof(struct deviceSpec) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001710 sizeof(struct regid));
1711 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712 }
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001713 eid = (struct regid *)dsea->impUse;
1714 memset(eid, 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 strcpy(eid->ident, UDF_ID_DEVELOPER);
1716 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1717 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1718 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1719 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1720 }
1721
Steve Nickelb2527bf2012-02-16 12:53:53 -05001722 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1723 lb_recorded = 0; /* No extents => no blocks! */
1724 else
1725 lb_recorded =
1726 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1727 (blocksize_bits - 9);
1728
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001729 if (iinfo->i_efe == 0) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001730 memcpy(bh->b_data + sizeof(struct fileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001731 iinfo->i_ext.i_data,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001732 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Steve Nickelb2527bf2012-02-16 12:53:53 -05001733 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734
Marcin Slusarz56774802008-02-10 11:25:31 +01001735 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1736 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1737 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001738 memset(&(fe->impIdent), 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1740 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1741 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001742 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1743 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1744 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001745 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1747 crclen = sizeof(struct fileEntry);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001748 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001749 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001750 iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001751 inode->i_sb->s_blocksize -
1752 sizeof(struct extendedFileEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 efe->objectSize = cpu_to_le64(inode->i_size);
Steve Nickelb2527bf2012-02-16 12:53:53 -05001754 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001756 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1757 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1758 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1759 iinfo->i_crtime = inode->i_atime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001760
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001761 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1762 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1763 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1764 iinfo->i_crtime = inode->i_mtime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001765
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001766 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1767 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1768 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1769 iinfo->i_crtime = inode->i_ctime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770
Marcin Slusarz56774802008-02-10 11:25:31 +01001771 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1772 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1773 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1774 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001776 memset(&(efe->impIdent), 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1778 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1779 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001780 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1781 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1782 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001783 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1785 crclen = sizeof(struct extendedFileEntry);
1786 }
Steven J. Magnani70f19f52015-07-07 13:06:05 -05001787
1788finish:
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001789 if (iinfo->i_strat4096) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 fe->icbTag.strategyType = cpu_to_le16(4096);
1791 fe->icbTag.strategyParameter = cpu_to_le16(1);
1792 fe->icbTag.numEntries = cpu_to_le16(2);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001793 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 fe->icbTag.strategyType = cpu_to_le16(4);
1795 fe->icbTag.numEntries = cpu_to_le16(1);
1796 }
1797
Steven J. Magnani70f19f52015-07-07 13:06:05 -05001798 if (iinfo->i_use)
1799 fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE;
1800 else if (S_ISDIR(inode->i_mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1802 else if (S_ISREG(inode->i_mode))
1803 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1804 else if (S_ISLNK(inode->i_mode))
1805 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1806 else if (S_ISBLK(inode->i_mode))
1807 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1808 else if (S_ISCHR(inode->i_mode))
1809 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1810 else if (S_ISFIFO(inode->i_mode))
1811 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1812 else if (S_ISSOCK(inode->i_mode))
1813 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1814
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001815 icbflags = iinfo->i_alloc_type |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001816 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1817 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1818 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1819 (le16_to_cpu(fe->icbTag.flags) &
1820 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1821 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822
1823 fe->icbTag.flags = cpu_to_le16(icbflags);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001824 if (sbi->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 fe->descTag.descVersion = cpu_to_le16(3);
1826 else
1827 fe->descTag.descVersion = cpu_to_le16(2);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001828 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001829 fe->descTag.tagLocation = cpu_to_le32(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001830 iinfo->i_location.logicalBlockNum);
Jan Karaaae917c2010-01-08 16:46:29 +01001831 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832 fe->descTag.descCRCLength = cpu_to_le16(crclen);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001833 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001834 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001835 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836
Jan Kara5833ded2010-01-08 16:52:59 +01001837 set_buffer_uptodate(bh);
Jan Karaaae917c2010-01-08 16:46:29 +01001838 unlock_buffer(bh);
1839
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 /* write the data blocks */
1841 mark_buffer_dirty(bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001842 if (do_sync) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 sync_dirty_buffer(bh);
Jan Karaaae917c2010-01-08 16:46:29 +01001844 if (buffer_write_io_error(bh)) {
Joe Perches78ace702011-10-10 01:08:05 -07001845 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1846 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 err = -EIO;
1848 }
1849 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001850 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001851
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 return err;
1853}
1854
Jan Kara6174c2e2014-10-09 12:52:16 +02001855struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino,
1856 bool hidden_inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857{
1858 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1859 struct inode *inode = iget_locked(sb, block);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001860 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861
1862 if (!inode)
Jan Kara6d3d5e82014-09-04 16:15:51 +02001863 return ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864
Jan Kara6d3d5e82014-09-04 16:15:51 +02001865 if (!(inode->i_state & I_NEW))
1866 return inode;
1867
1868 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
Jan Kara6174c2e2014-10-09 12:52:16 +02001869 err = udf_read_inode(inode, hidden_inode);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001870 if (err < 0) {
1871 iget_failed(inode);
1872 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001874 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875
1876 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877}
1878
Jan Karafcea62b2015-12-23 14:21:13 +01001879int udf_setup_indirect_aext(struct inode *inode, int block,
1880 struct extent_position *epos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881{
Jan Karafcea62b2015-12-23 14:21:13 +01001882 struct super_block *sb = inode->i_sb;
1883 struct buffer_head *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 struct allocExtDesc *aed;
Jan Karafcea62b2015-12-23 14:21:13 +01001885 struct extent_position nepos;
1886 struct kernel_lb_addr neloc;
1887 int ver, adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888
Jan Karafcea62b2015-12-23 14:21:13 +01001889 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1890 adsize = sizeof(struct short_ad);
1891 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1892 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 else
Arnd Bergmann4f1b1512016-01-01 15:21:54 +01001894 return -EIO;
Jan Karafcea62b2015-12-23 14:21:13 +01001895
1896 neloc.logicalBlockNum = block;
1897 neloc.partitionReferenceNum = epos->block.partitionReferenceNum;
1898
1899 bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0));
1900 if (!bh)
1901 return -EIO;
1902 lock_buffer(bh);
1903 memset(bh->b_data, 0x00, sb->s_blocksize);
1904 set_buffer_uptodate(bh);
1905 unlock_buffer(bh);
1906 mark_buffer_dirty_inode(bh, inode);
1907
1908 aed = (struct allocExtDesc *)(bh->b_data);
1909 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) {
1910 aed->previousAllocExtLocation =
1911 cpu_to_le32(epos->block.logicalBlockNum);
1912 }
1913 aed->lengthAllocDescs = cpu_to_le32(0);
1914 if (UDF_SB(sb)->s_udfrev >= 0x0200)
1915 ver = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 else
Jan Karafcea62b2015-12-23 14:21:13 +01001917 ver = 2;
1918 udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block,
1919 sizeof(struct tag));
1920
1921 nepos.block = neloc;
1922 nepos.offset = sizeof(struct allocExtDesc);
1923 nepos.bh = bh;
1924
1925 /*
1926 * Do we have to copy current last extent to make space for indirect
1927 * one?
1928 */
1929 if (epos->offset + adsize > sb->s_blocksize) {
1930 struct kernel_lb_addr cp_loc;
1931 uint32_t cp_len;
1932 int cp_type;
1933
1934 epos->offset -= adsize;
1935 cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0);
1936 cp_len |= ((uint32_t)cp_type) << 30;
1937
1938 __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1);
1939 udf_write_aext(inode, epos, &nepos.block,
1940 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0);
1941 } else {
1942 __udf_add_aext(inode, epos, &nepos.block,
1943 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0);
1944 }
1945
1946 brelse(epos->bh);
1947 *epos = nepos;
1948
1949 return 0;
1950}
1951
1952/*
1953 * Append extent at the given position - should be the first free one in inode
1954 * / indirect extent. This function assumes there is enough space in the inode
1955 * or indirect extent. Use udf_add_aext() if you didn't check for this before.
1956 */
1957int __udf_add_aext(struct inode *inode, struct extent_position *epos,
1958 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1959{
1960 struct udf_inode_info *iinfo = UDF_I(inode);
1961 struct allocExtDesc *aed;
1962 int adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001964 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001965 adsize = sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001966 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001967 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968 else
Jan Kara7e49b6f2010-10-22 00:30:26 +02001969 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970
Jan Karafcea62b2015-12-23 14:21:13 +01001971 if (!epos->bh) {
1972 WARN_ON(iinfo->i_lenAlloc !=
1973 epos->offset - udf_file_entry_alloc_offset(inode));
1974 } else {
1975 aed = (struct allocExtDesc *)epos->bh->b_data;
1976 WARN_ON(le32_to_cpu(aed->lengthAllocDescs) !=
1977 epos->offset - sizeof(struct allocExtDesc));
1978 WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 }
1980
Jan Kara7e49b6f2010-10-22 00:30:26 +02001981 udf_write_aext(inode, epos, eloc, elen, inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001983 if (!epos->bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001984 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001986 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001987 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001988 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001989 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1990 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1991 udf_update_tag(epos->bh->b_data,
1992 epos->offset + (inc ? 0 : adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001994 udf_update_tag(epos->bh->b_data,
1995 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001996 mark_buffer_dirty_inode(epos->bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997 }
1998
Jan Kara7e49b6f2010-10-22 00:30:26 +02001999 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000}
2001
Jan Karafcea62b2015-12-23 14:21:13 +01002002/*
2003 * Append extent at given position - should be the first free one in inode
2004 * / indirect extent. Takes care of allocating and linking indirect blocks.
2005 */
2006int udf_add_aext(struct inode *inode, struct extent_position *epos,
2007 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2008{
2009 int adsize;
2010 struct super_block *sb = inode->i_sb;
2011
2012 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2013 adsize = sizeof(struct short_ad);
2014 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2015 adsize = sizeof(struct long_ad);
2016 else
2017 return -EIO;
2018
2019 if (epos->offset + (2 * adsize) > sb->s_blocksize) {
2020 int err;
2021 int new_block;
2022
2023 new_block = udf_new_block(sb, NULL,
2024 epos->block.partitionReferenceNum,
2025 epos->block.logicalBlockNum, &err);
2026 if (!new_block)
2027 return -ENOSPC;
2028
2029 err = udf_setup_indirect_aext(inode, new_block, epos);
2030 if (err)
2031 return err;
2032 }
2033
2034 return __udf_add_aext(inode, epos, eloc, elen, inc);
2035}
2036
Jan Kara7e49b6f2010-10-22 00:30:26 +02002037void udf_write_aext(struct inode *inode, struct extent_position *epos,
2038 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039{
2040 int adsize;
2041 uint8_t *ptr;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002042 struct short_ad *sad;
2043 struct long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002044 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045
Jan Karaff116fc2007-05-08 00:35:14 -07002046 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002047 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08002048 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002049 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 else
Jan Karaff116fc2007-05-08 00:35:14 -07002051 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002053 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002054 case ICBTAG_FLAG_AD_SHORT:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002055 sad = (struct short_ad *)ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002056 sad->extLength = cpu_to_le32(elen);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002057 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002058 adsize = sizeof(struct short_ad);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002059 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002060 case ICBTAG_FLAG_AD_LONG:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002061 lad = (struct long_ad *)ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002062 lad->extLength = cpu_to_le32(elen);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002063 lad->extLocation = cpu_to_lelb(*eloc);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002064 memset(lad->impUse, 0x00, sizeof(lad->impUse));
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002065 adsize = sizeof(struct long_ad);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002066 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002067 default:
Jan Kara7e49b6f2010-10-22 00:30:26 +02002068 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 }
2070
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002071 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002072 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002073 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002074 struct allocExtDesc *aed =
2075 (struct allocExtDesc *)epos->bh->b_data;
Jan Karaff116fc2007-05-08 00:35:14 -07002076 udf_update_tag(epos->bh->b_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08002077 le32_to_cpu(aed->lengthAllocDescs) +
2078 sizeof(struct allocExtDesc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079 }
Jan Karaff116fc2007-05-08 00:35:14 -07002080 mark_buffer_dirty_inode(epos->bh, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002081 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002083 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
2085 if (inc)
Jan Karaff116fc2007-05-08 00:35:14 -07002086 epos->offset += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087}
2088
Vegard Nossumb0918d92015-12-11 15:54:16 +01002089/*
2090 * Only 1 indirect extent in a row really makes sense but allow upto 16 in case
2091 * someone does some weird stuff.
2092 */
2093#define UDF_MAX_INDIR_EXTS 16
2094
Marcin Slusarz4b111112008-02-08 04:20:36 -08002095int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002096 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097{
2098 int8_t etype;
Vegard Nossumb0918d92015-12-11 15:54:16 +01002099 unsigned int indirections = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100
Jan Karaff116fc2007-05-08 00:35:14 -07002101 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002102 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002103 int block;
Vegard Nossumb0918d92015-12-11 15:54:16 +01002104
2105 if (++indirections > UDF_MAX_INDIR_EXTS) {
2106 udf_err(inode->i_sb,
2107 "too many indirect extents in inode %lu\n",
2108 inode->i_ino);
2109 return -1;
2110 }
2111
Jan Karaff116fc2007-05-08 00:35:14 -07002112 epos->block = *eloc;
2113 epos->offset = sizeof(struct allocExtDesc);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002114 brelse(epos->bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002115 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002116 epos->bh = udf_tread(inode->i_sb, block);
2117 if (!epos->bh) {
2118 udf_debug("reading block %d failed!\n", block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 return -1;
2120 }
2121 }
2122
2123 return etype;
2124}
2125
Marcin Slusarz4b111112008-02-08 04:20:36 -08002126int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002127 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128{
2129 int alen;
2130 int8_t etype;
2131 uint8_t *ptr;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002132 struct short_ad *sad;
2133 struct long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002134 struct udf_inode_info *iinfo = UDF_I(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002135
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002136 if (!epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07002137 if (!epos->offset)
2138 epos->offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002139 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08002140 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002141 iinfo->i_lenEAttr;
Marcin Slusarz4b111112008-02-08 04:20:36 -08002142 alen = udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002143 iinfo->i_lenAlloc;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002144 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002145 if (!epos->offset)
2146 epos->offset = sizeof(struct allocExtDesc);
2147 ptr = epos->bh->b_data + epos->offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002148 alen = sizeof(struct allocExtDesc) +
Marcin Slusarz4b111112008-02-08 04:20:36 -08002149 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2150 lengthAllocDescs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 }
2152
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002153 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002154 case ICBTAG_FLAG_AD_SHORT:
Marcin Slusarz4b111112008-02-08 04:20:36 -08002155 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2156 if (!sad)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157 return -1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002158 etype = le32_to_cpu(sad->extLength) >> 30;
2159 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002160 eloc->partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002161 iinfo->i_location.partitionReferenceNum;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002162 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2163 break;
2164 case ICBTAG_FLAG_AD_LONG:
Marcin Slusarz4b111112008-02-08 04:20:36 -08002165 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2166 if (!lad)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002167 return -1;
2168 etype = le32_to_cpu(lad->extLength) >> 30;
2169 *eloc = lelb_to_cpu(lad->extLocation);
2170 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2171 break;
2172 default:
Joe Perchesa983f362011-10-10 01:08:07 -07002173 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002174 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175 }
2176
2177 return etype;
2178}
2179
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002180static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002181 struct kernel_lb_addr neloc, uint32_t nelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002183 struct kernel_lb_addr oeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 uint32_t oelen;
2185 int8_t etype;
2186
Jan Karaff116fc2007-05-08 00:35:14 -07002187 if (epos.bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07002188 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002190 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002191 udf_write_aext(inode, &epos, &neloc, nelen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192 neloc = oeloc;
2193 nelen = (etype << 30) | oelen;
2194 }
Pekka Enberg97e961f2008-10-15 12:29:03 +02002195 udf_add_aext(inode, &epos, &neloc, nelen, 1);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002196 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002197
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 return (nelen >> 30);
2199}
2200
Marcin Slusarz4b111112008-02-08 04:20:36 -08002201int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002202 struct kernel_lb_addr eloc, uint32_t elen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203{
Jan Karaff116fc2007-05-08 00:35:14 -07002204 struct extent_position oepos;
2205 int adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206 int8_t etype;
2207 struct allocExtDesc *aed;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002208 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002210 if (epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002211 get_bh(epos.bh);
2212 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213 }
2214
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002215 iinfo = UDF_I(inode);
2216 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002217 adsize = sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002218 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002219 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220 else
2221 adsize = 0;
2222
Jan Karaff116fc2007-05-08 00:35:14 -07002223 oepos = epos;
2224 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 return -1;
2226
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002227 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002228 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002229 if (oepos.bh != epos.bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07002230 oepos.block = epos.block;
Jan Kara3bf25cb2007-05-08 00:35:16 -07002231 brelse(oepos.bh);
2232 get_bh(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -07002233 oepos.bh = epos.bh;
2234 oepos.offset = epos.offset - adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002235 }
2236 }
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002237 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238 elen = 0;
2239
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002240 if (epos.bh != oepos.bh) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002241 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2242 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2243 udf_write_aext(inode, &oepos, &eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002244 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002245 iinfo->i_lenAlloc -= (adsize * 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002247 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002248 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01002249 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002250 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002251 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08002252 udf_update_tag(oepos.bh->b_data,
2253 oepos.offset - (2 * adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08002255 udf_update_tag(oepos.bh->b_data,
2256 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07002257 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002259 } else {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002260 udf_write_aext(inode, &oepos, &eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002261 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002262 iinfo->i_lenAlloc -= adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002264 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002265 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01002266 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002267 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002268 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08002269 udf_update_tag(oepos.bh->b_data,
2270 epos.offset - adsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08002272 udf_update_tag(oepos.bh->b_data,
2273 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07002274 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 }
2276 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07002277
Jan Kara3bf25cb2007-05-08 00:35:16 -07002278 brelse(epos.bh);
2279 brelse(oepos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002280
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 return (elen >> 30);
2282}
2283
Marcin Slusarz4b111112008-02-08 04:20:36 -08002284int8_t inode_bmap(struct inode *inode, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002285 struct extent_position *pos, struct kernel_lb_addr *eloc,
Marcin Slusarz4b111112008-02-08 04:20:36 -08002286 uint32_t *elen, sector_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287{
Marcin Slusarz4b111112008-02-08 04:20:36 -08002288 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002289 loff_t lbcount = 0, bcount =
Marcin Slusarz4b111112008-02-08 04:20:36 -08002290 (loff_t) block << blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002292 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002294 iinfo = UDF_I(inode);
Namjae Jeon99600052013-01-19 11:17:14 +09002295 if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
2296 pos->offset = 0;
2297 pos->block = iinfo->i_location;
2298 pos->bh = NULL;
2299 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300 *elen = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002301 do {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002302 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2303 if (etype == -1) {
2304 *offset = (bcount - lbcount) >> blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002305 iinfo->i_lenExtents = lbcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306 return -1;
2307 }
2308 lbcount += *elen;
2309 } while (lbcount <= bcount);
Namjae Jeon99600052013-01-19 11:17:14 +09002310 /* update extent cache */
2311 udf_update_extent_cache(inode, lbcount - *elen, pos, 1);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002312 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313
2314 return etype;
2315}
2316
Jan Kara60448b12007-05-08 00:35:13 -07002317long udf_block_map(struct inode *inode, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002319 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -07002320 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -07002321 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002322 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323 int ret;
2324
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01002325 down_read(&UDF_I(inode)->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326
Marcin Slusarz4b111112008-02-08 04:20:36 -08002327 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2328 (EXT_RECORDED_ALLOCATED >> 30))
Pekka Enberg97e961f2008-10-15 12:29:03 +02002329 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330 else
2331 ret = 0;
2332
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01002333 up_read(&UDF_I(inode)->i_data_sem);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002334 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335
2336 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2337 return udf_fixed_to_variable(ret);
2338 else
2339 return ret;
2340}