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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * inode.c
3 *
4 * PURPOSE
5 * Inode handling routines for the OSTA-UDF(tm) filesystem.
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * COPYRIGHT
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
12 *
13 * (C) 1998 Dave Boynton
14 * (C) 1998-2004 Ben Fennema
15 * (C) 1999-2000 Stelias Computing Inc
16 *
17 * HISTORY
18 *
19 * 10/04/98 dgb Added rudimentary directory functions
20 * 10/07/98 Fully working udf_block_map! It works!
21 * 11/25/98 bmap altered to better support extents
Marcin Slusarz4b111112008-02-08 04:20:36 -080022 * 12/06/98 blf partition support in udf_iget, udf_block_map
23 * and udf_read_inode
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * 12/12/98 rewrote udf_block_map to handle next extents and descs across
25 * block boundaries (which is not actually allowed)
26 * 12/20/98 added support for strategy 4096
27 * 03/07/99 rewrote udf_block_map (again)
28 * New funcs, inode_bmap, udf_next_aext
29 * 04/19/99 Support for writing device EA's for major/minor #
30 */
31
32#include "udfdecl.h"
33#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/module.h>
35#include <linux/pagemap.h>
36#include <linux/buffer_head.h>
37#include <linux/writeback.h>
38#include <linux/slab.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020039#include <linux/crc-itu-t.h>
Namjae Jeonbc112322011-10-03 14:02:59 +090040#include <linux/mpage.h>
Kent Overstreeta27bb332013-05-07 16:19:08 -070041#include <linux/aio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43#include "udf_i.h"
44#include "udf_sb.h"
45
46MODULE_AUTHOR("Ben Fennema");
47MODULE_DESCRIPTION("Universal Disk Format Filesystem");
48MODULE_LICENSE("GPL");
49
50#define EXTENT_MERGE_SIZE 5
51
Al Virofaa17292011-07-26 03:18:29 -040052static umode_t udf_convert_permissions(struct fileEntry *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053static int udf_update_inode(struct inode *, int);
Jan Kara49521de2010-10-20 17:42:44 +020054static int udf_sync_inode(struct inode *inode);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -070055static int udf_alloc_i_data(struct inode *inode, size_t size);
Jan Kara7b0b0932011-12-10 01:43:33 +010056static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
Jan Karaff116fc2007-05-08 00:35:14 -070057static int8_t udf_insert_aext(struct inode *, struct extent_position,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020058 struct kernel_lb_addr, uint32_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059static void udf_split_extents(struct inode *, int *, int, int,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020060 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061static void udf_prealloc_extents(struct inode *, int, int,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020062 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static void udf_merge_extents(struct inode *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020064 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static void udf_update_extents(struct inode *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020066 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070067 struct extent_position *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
69
Namjae Jeon99600052013-01-19 11:17:14 +090070static void __udf_clear_extent_cache(struct inode *inode)
71{
72 struct udf_inode_info *iinfo = UDF_I(inode);
73
74 if (iinfo->cached_extent.lstart != -1) {
75 brelse(iinfo->cached_extent.epos.bh);
76 iinfo->cached_extent.lstart = -1;
77 }
78}
79
80/* Invalidate extent cache */
81static void udf_clear_extent_cache(struct inode *inode)
82{
83 struct udf_inode_info *iinfo = UDF_I(inode);
84
85 spin_lock(&iinfo->i_extent_cache_lock);
86 __udf_clear_extent_cache(inode);
87 spin_unlock(&iinfo->i_extent_cache_lock);
88}
89
90/* Return contents of extent cache */
91static int udf_read_extent_cache(struct inode *inode, loff_t bcount,
92 loff_t *lbcount, struct extent_position *pos)
93{
94 struct udf_inode_info *iinfo = UDF_I(inode);
95 int ret = 0;
96
97 spin_lock(&iinfo->i_extent_cache_lock);
98 if ((iinfo->cached_extent.lstart <= bcount) &&
99 (iinfo->cached_extent.lstart != -1)) {
100 /* Cache hit */
101 *lbcount = iinfo->cached_extent.lstart;
102 memcpy(pos, &iinfo->cached_extent.epos,
103 sizeof(struct extent_position));
104 if (pos->bh)
105 get_bh(pos->bh);
106 ret = 1;
107 }
108 spin_unlock(&iinfo->i_extent_cache_lock);
109 return ret;
110}
111
112/* Add extent to extent cache */
113static void udf_update_extent_cache(struct inode *inode, loff_t estart,
114 struct extent_position *pos, int next_epos)
115{
116 struct udf_inode_info *iinfo = UDF_I(inode);
117
118 spin_lock(&iinfo->i_extent_cache_lock);
119 /* Invalidate previously cached extent */
120 __udf_clear_extent_cache(inode);
121 if (pos->bh)
122 get_bh(pos->bh);
123 memcpy(&iinfo->cached_extent.epos, pos,
124 sizeof(struct extent_position));
125 iinfo->cached_extent.lstart = estart;
126 if (next_epos)
127 switch (iinfo->i_alloc_type) {
128 case ICBTAG_FLAG_AD_SHORT:
129 iinfo->cached_extent.epos.offset -=
130 sizeof(struct short_ad);
131 break;
132 case ICBTAG_FLAG_AD_LONG:
133 iinfo->cached_extent.epos.offset -=
134 sizeof(struct long_ad);
135 }
136 spin_unlock(&iinfo->i_extent_cache_lock);
137}
Christoph Hellwigb1e32122008-02-22 12:38:48 +0100138
Al Viro3aac2b62010-06-07 00:43:39 -0400139void udf_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140{
Jan Kara2c948b32009-12-03 13:39:28 +0100141 struct udf_inode_info *iinfo = UDF_I(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400142 int want_delete = 0;
Jan Kara2c948b32009-12-03 13:39:28 +0100143
Al Viro3aac2b62010-06-07 00:43:39 -0400144 if (!inode->i_nlink && !is_bad_inode(inode)) {
145 want_delete = 1;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200146 udf_setsize(inode, 0);
Al Viro3aac2b62010-06-07 00:43:39 -0400147 udf_update_inode(inode, IS_SYNC(inode));
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700148 }
149 truncate_inode_pages_final(&inode->i_data);
Al Viro3aac2b62010-06-07 00:43:39 -0400150 invalidate_inode_buffers(inode);
Jan Karadbd57682012-05-03 14:48:02 +0200151 clear_inode(inode);
Jan Kara2c948b32009-12-03 13:39:28 +0100152 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
153 inode->i_size != iinfo->i_lenExtents) {
Joe Perches78ace702011-10-10 01:08:05 -0700154 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",
155 inode->i_ino, inode->i_mode,
156 (unsigned long long)inode->i_size,
157 (unsigned long long)iinfo->i_lenExtents);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800159 kfree(iinfo->i_ext.i_data);
160 iinfo->i_ext.i_data = NULL;
Namjae Jeon99600052013-01-19 11:17:14 +0900161 udf_clear_extent_cache(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400162 if (want_delete) {
Al Viro3aac2b62010-06-07 00:43:39 -0400163 udf_free_inode(inode);
Al Viro3aac2b62010-06-07 00:43:39 -0400164 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165}
166
Ian Abbott5eec54f2012-09-05 17:44:31 +0100167static void udf_write_failed(struct address_space *mapping, loff_t to)
168{
169 struct inode *inode = mapping->host;
170 struct udf_inode_info *iinfo = UDF_I(inode);
171 loff_t isize = inode->i_size;
172
173 if (to > isize) {
Kirill A. Shutemov7caef262013-09-12 15:13:56 -0700174 truncate_pagecache(inode, isize);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100175 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
176 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +0900177 udf_clear_extent_cache(inode);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100178 udf_truncate_extents(inode);
179 up_write(&iinfo->i_data_sem);
180 }
181 }
182}
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184static int udf_writepage(struct page *page, struct writeback_control *wbc)
185{
186 return block_write_full_page(page, udf_get_block, wbc);
187}
188
Namjae Jeon378b8e12012-08-31 12:49:07 -0400189static int udf_writepages(struct address_space *mapping,
190 struct writeback_control *wbc)
191{
192 return mpage_writepages(mapping, wbc, udf_get_block);
193}
194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195static int udf_readpage(struct file *file, struct page *page)
196{
Namjae Jeonbc112322011-10-03 14:02:59 +0900197 return mpage_readpage(page, udf_get_block);
198}
199
200static int udf_readpages(struct file *file, struct address_space *mapping,
201 struct list_head *pages, unsigned nr_pages)
202{
203 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204}
205
Nick Pigginbe021ee2007-10-16 01:25:20 -0700206static int udf_write_begin(struct file *file, struct address_space *mapping,
207 loff_t pos, unsigned len, unsigned flags,
208 struct page **pagep, void **fsdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
Christoph Hellwig155130a2010-06-04 11:29:58 +0200210 int ret;
211
212 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100213 if (unlikely(ret))
214 udf_write_failed(mapping, pos + len);
215 return ret;
216}
Jan Kara7e49b6f2010-10-22 00:30:26 +0200217
Ian Abbott5eec54f2012-09-05 17:44:31 +0100218static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
Al Virod8d3d942014-03-04 21:27:34 -0500219 struct iov_iter *iter,
220 loff_t offset)
Ian Abbott5eec54f2012-09-05 17:44:31 +0100221{
222 struct file *file = iocb->ki_filp;
223 struct address_space *mapping = file->f_mapping;
224 struct inode *inode = mapping->host;
Al Viroa6cbcd42014-03-04 22:38:00 -0500225 size_t count = iov_iter_count(iter);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100226 ssize_t ret;
Christoph Hellwig155130a2010-06-04 11:29:58 +0200227
Al Viro31b14032014-03-05 01:33:16 -0500228 ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, udf_get_block);
Ian Abbott5eec54f2012-09-05 17:44:31 +0100229 if (unlikely(ret < 0 && (rw & WRITE)))
Al Viroa6cbcd42014-03-04 22:38:00 -0500230 udf_write_failed(mapping, offset + count);
Christoph Hellwig155130a2010-06-04 11:29:58 +0200231 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232}
233
234static sector_t udf_bmap(struct address_space *mapping, sector_t block)
235{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700236 return generic_block_bmap(mapping, block, udf_get_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237}
238
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700239const struct address_space_operations udf_aops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700240 .readpage = udf_readpage,
Namjae Jeonbc112322011-10-03 14:02:59 +0900241 .readpages = udf_readpages,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700242 .writepage = udf_writepage,
Namjae Jeon378b8e12012-08-31 12:49:07 -0400243 .writepages = udf_writepages,
Ian Abbott5eec54f2012-09-05 17:44:31 +0100244 .write_begin = udf_write_begin,
245 .write_end = generic_write_end,
246 .direct_IO = udf_direct_IO,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700247 .bmap = udf_bmap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248};
249
Jan Karad2eb8c32011-12-10 02:30:48 +0100250/*
251 * Expand file stored in ICB to a normal one-block-file
252 *
253 * This function requires i_data_sem for writing and releases it.
254 * This function requires i_mutex held
255 */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200256int udf_expand_file_adinicb(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257{
258 struct page *page;
259 char *kaddr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800260 struct udf_inode_info *iinfo = UDF_I(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200261 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 struct writeback_control udf_wbc = {
263 .sync_mode = WB_SYNC_NONE,
264 .nr_to_write = 1,
265 };
266
Jan Kara09ebb172014-02-18 12:00:21 +0100267 WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800268 if (!iinfo->i_lenAlloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800270 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800272 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200273 /* from now on we have normal address_space methods */
274 inode->i_data.a_ops = &udf_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100275 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200277 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 }
Jan Karad2eb8c32011-12-10 02:30:48 +0100279 /*
280 * Release i_data_sem so that we can lock a page - page lock ranks
281 * above i_data_sem. i_mutex still protects us against file changes.
282 */
283 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
Jan Kara7e49b6f2010-10-22 00:30:26 +0200285 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
286 if (!page)
287 return -ENOMEM;
Matt Mackallcd7619d2005-05-01 08:59:01 -0700288
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700289 if (!PageUptodate(page)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 kaddr = kmap(page);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800291 memset(kaddr + iinfo->i_lenAlloc, 0x00,
292 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
293 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
294 iinfo->i_lenAlloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 flush_dcache_page(page);
296 SetPageUptodate(page);
297 kunmap(page);
298 }
Jan Karad2eb8c32011-12-10 02:30:48 +0100299 down_write(&iinfo->i_data_sem);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800300 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
301 iinfo->i_lenAlloc);
302 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800304 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800306 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200307 /* from now on we have normal address_space methods */
308 inode->i_data.a_ops = &udf_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100309 up_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200310 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
311 if (err) {
312 /* Restore everything back so that we don't lose data... */
313 lock_page(page);
314 kaddr = kmap(page);
Jan Karad2eb8c32011-12-10 02:30:48 +0100315 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200316 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
317 inode->i_size);
318 kunmap(page);
319 unlock_page(page);
320 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
321 inode->i_data.a_ops = &udf_adinicb_aops;
Jan Karad2eb8c32011-12-10 02:30:48 +0100322 up_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200323 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 page_cache_release(page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200326
327 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328}
329
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700330struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
331 int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
333 int newblock;
Jan Karaff116fc2007-05-08 00:35:14 -0700334 struct buffer_head *dbh = NULL;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200335 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 uint8_t alloctype;
Jan Karaff116fc2007-05-08 00:35:14 -0700337 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 struct udf_fileident_bh sfibh, dfibh;
Jan Karaaf793292008-02-08 04:20:50 -0800340 loff_t f_pos = udf_ext0_offset(inode);
341 int size = udf_ext0_offset(inode) + inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 struct fileIdentDesc cfi, *sfi, *dfi;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800343 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
346 alloctype = ICBTAG_FLAG_AD_SHORT;
347 else
348 alloctype = ICBTAG_FLAG_AD_LONG;
349
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700350 if (!inode->i_size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800351 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 mark_inode_dirty(inode);
353 return NULL;
354 }
355
356 /* alloc block, and copy data to it */
357 *block = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800358 iinfo->i_location.partitionReferenceNum,
359 iinfo->i_location.logicalBlockNum, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 if (!(*block))
361 return NULL;
362 newblock = udf_get_pblock(inode->i_sb, *block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800363 iinfo->i_location.partitionReferenceNum,
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800364 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 if (!newblock)
366 return NULL;
367 dbh = udf_tgetblk(inode->i_sb, newblock);
368 if (!dbh)
369 return NULL;
370 lock_buffer(dbh);
371 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
372 set_buffer_uptodate(dbh);
373 unlock_buffer(dbh);
374 mark_buffer_dirty_inode(dbh, inode);
375
Marcin Slusarz4b111112008-02-08 04:20:36 -0800376 sfibh.soffset = sfibh.eoffset =
Jan Karaaf793292008-02-08 04:20:50 -0800377 f_pos & (inode->i_sb->s_blocksize - 1);
Jan Karaff116fc2007-05-08 00:35:14 -0700378 sfibh.sbh = sfibh.ebh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 dfibh.soffset = dfibh.eoffset = 0;
380 dfibh.sbh = dfibh.ebh = dbh;
Jan Karaaf793292008-02-08 04:20:50 -0800381 while (f_pos < size) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800382 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800383 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
384 NULL, NULL, NULL);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700385 if (!sfi) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700386 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 return NULL;
388 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800389 iinfo->i_alloc_type = alloctype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 sfi->descTag.tagLocation = cpu_to_le32(*block);
391 dfibh.soffset = dfibh.eoffset;
392 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
393 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
394 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800395 sfi->fileIdent +
396 le16_to_cpu(sfi->lengthOfImpUse))) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800397 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700398 brelse(dbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 return NULL;
400 }
401 }
402 mark_buffer_dirty_inode(dbh, inode);
403
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800404 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
405 iinfo->i_lenAlloc);
406 iinfo->i_lenAlloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 eloc.logicalBlockNum = *block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800408 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800409 iinfo->i_location.partitionReferenceNum;
Jan Kara2c948b32009-12-03 13:39:28 +0100410 iinfo->i_lenExtents = inode->i_size;
Jan Karaff116fc2007-05-08 00:35:14 -0700411 epos.bh = NULL;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800412 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700413 epos.offset = udf_file_entry_alloc_offset(inode);
Jan Kara2c948b32009-12-03 13:39:28 +0100414 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 /* UniqueID stuff */
416
Jan Kara3bf25cb2007-05-08 00:35:16 -0700417 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 mark_inode_dirty(inode);
419 return dbh;
420}
421
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700422static int udf_get_block(struct inode *inode, sector_t block,
423 struct buffer_head *bh_result, int create)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424{
425 int err, new;
Marcin Slusarz1ed16172008-02-08 04:20:48 -0800426 sector_t phys = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800427 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700429 if (!create) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 phys = udf_block_map(inode, block);
431 if (phys)
432 map_bh(bh_result, inode->i_sb, phys);
433 return 0;
434 }
435
436 err = -EIO;
437 new = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800438 iinfo = UDF_I(inode);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100439
440 down_write(&iinfo->i_data_sem);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800441 if (block == iinfo->i_next_alloc_block + 1) {
442 iinfo->i_next_alloc_block++;
443 iinfo->i_next_alloc_goal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 }
445
Namjae Jeon99600052013-01-19 11:17:14 +0900446 udf_clear_extent_cache(inode);
Jan Kara7b0b0932011-12-10 01:43:33 +0100447 phys = inode_getblk(inode, block, &err, &new);
448 if (!phys)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 goto abort;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450
451 if (new)
452 set_buffer_new(bh_result);
453 map_bh(bh_result, inode->i_sb, phys);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700454
455abort:
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100456 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458}
459
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700460static struct buffer_head *udf_getblk(struct inode *inode, long block,
461 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462{
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700463 struct buffer_head *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 struct buffer_head dummy;
465
466 dummy.b_state = 0;
467 dummy.b_blocknr = -1000;
468 *err = udf_get_block(inode, block, &dummy, create);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700469 if (!*err && buffer_mapped(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700471 if (buffer_new(&dummy)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 lock_buffer(bh);
473 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
474 set_buffer_uptodate(bh);
475 unlock_buffer(bh);
476 mark_buffer_dirty_inode(bh, inode);
477 }
478 return bh;
479 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700480
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 return NULL;
482}
483
Jan Kara31170b62007-05-08 00:35:21 -0700484/* Extend the file by 'blocks' blocks, return the number of extents added */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200485static int udf_do_extend_file(struct inode *inode,
486 struct extent_position *last_pos,
487 struct kernel_long_ad *last_ext,
488 sector_t blocks)
Jan Kara31170b62007-05-08 00:35:21 -0700489{
490 sector_t add;
491 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
492 struct super_block *sb = inode->i_sb;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200493 struct kernel_lb_addr prealloc_loc = {};
Jan Kara31170b62007-05-08 00:35:21 -0700494 int prealloc_len = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800495 struct udf_inode_info *iinfo;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200496 int err;
Jan Kara31170b62007-05-08 00:35:21 -0700497
498 /* The previous extent is fake and we should not extend by anything
499 * - there's nothing to do... */
500 if (!blocks && fake)
501 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700502
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800503 iinfo = UDF_I(inode);
Jan Kara31170b62007-05-08 00:35:21 -0700504 /* Round the last extent up to a multiple of block size */
505 if (last_ext->extLength & (sb->s_blocksize - 1)) {
506 last_ext->extLength =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700507 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
508 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
509 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800510 iinfo->i_lenExtents =
511 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700512 ~(sb->s_blocksize - 1);
Jan Kara31170b62007-05-08 00:35:21 -0700513 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700514
Jan Kara31170b62007-05-08 00:35:21 -0700515 /* Last extent are just preallocated blocks? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800516 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
517 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700518 /* Save the extent so that we can reattach it to the end */
519 prealloc_loc = last_ext->extLocation;
520 prealloc_len = last_ext->extLength;
521 /* Mark the extent as a hole */
522 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700523 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
Jan Kara31170b62007-05-08 00:35:21 -0700524 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800525 last_ext->extLocation.partitionReferenceNum = 0;
Jan Kara31170b62007-05-08 00:35:21 -0700526 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700527
Jan Kara31170b62007-05-08 00:35:21 -0700528 /* Can we merge with the previous extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800529 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
530 EXT_NOT_RECORDED_NOT_ALLOCATED) {
531 add = ((1 << 30) - sb->s_blocksize -
532 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
533 sb->s_blocksize_bits;
Jan Kara31170b62007-05-08 00:35:21 -0700534 if (add > blocks)
535 add = blocks;
536 blocks -= add;
537 last_ext->extLength += add << sb->s_blocksize_bits;
538 }
539
540 if (fake) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200541 udf_add_aext(inode, last_pos, &last_ext->extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700542 last_ext->extLength, 1);
Jan Kara31170b62007-05-08 00:35:21 -0700543 count++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800544 } else
Pekka Enberg97e961f2008-10-15 12:29:03 +0200545 udf_write_aext(inode, last_pos, &last_ext->extLocation,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800546 last_ext->extLength, 1);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700547
Jan Kara31170b62007-05-08 00:35:21 -0700548 /* Managed to do everything necessary? */
549 if (!blocks)
550 goto out;
551
552 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
553 last_ext->extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800554 last_ext->extLocation.partitionReferenceNum = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700555 add = (1 << (30-sb->s_blocksize_bits)) - 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800556 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
557 (add << sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700558
Jan Kara31170b62007-05-08 00:35:21 -0700559 /* Create enough extents to cover the whole hole */
560 while (blocks > add) {
561 blocks -= add;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200562 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
563 last_ext->extLength, 1);
564 if (err)
565 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700566 count++;
567 }
568 if (blocks) {
569 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700570 (blocks << sb->s_blocksize_bits);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200571 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
572 last_ext->extLength, 1);
573 if (err)
574 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700575 count++;
576 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700577
578out:
Jan Kara31170b62007-05-08 00:35:21 -0700579 /* Do we have some preallocated blocks saved? */
580 if (prealloc_len) {
Jan Kara7e49b6f2010-10-22 00:30:26 +0200581 err = udf_add_aext(inode, last_pos, &prealloc_loc,
582 prealloc_len, 1);
583 if (err)
584 return err;
Jan Kara31170b62007-05-08 00:35:21 -0700585 last_ext->extLocation = prealloc_loc;
586 last_ext->extLength = prealloc_len;
587 count++;
588 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700589
Jan Kara31170b62007-05-08 00:35:21 -0700590 /* last_pos should point to the last written extent... */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800591 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200592 last_pos->offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800593 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200594 last_pos->offset -= sizeof(struct long_ad);
Jan Kara31170b62007-05-08 00:35:21 -0700595 else
Jan Kara7e49b6f2010-10-22 00:30:26 +0200596 return -EIO;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700597
Jan Kara31170b62007-05-08 00:35:21 -0700598 return count;
599}
600
Jan Kara7e49b6f2010-10-22 00:30:26 +0200601static int udf_extend_file(struct inode *inode, loff_t newsize)
602{
603
604 struct extent_position epos;
605 struct kernel_lb_addr eloc;
606 uint32_t elen;
607 int8_t etype;
608 struct super_block *sb = inode->i_sb;
609 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
610 int adsize;
611 struct udf_inode_info *iinfo = UDF_I(inode);
612 struct kernel_long_ad extent;
613 int err;
614
615 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
616 adsize = sizeof(struct short_ad);
617 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
618 adsize = sizeof(struct long_ad);
619 else
620 BUG();
621
622 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
623
624 /* File has extent covering the new size (could happen when extending
625 * inside a block)? */
626 if (etype != -1)
627 return 0;
628 if (newsize & (sb->s_blocksize - 1))
629 offset++;
630 /* Extended file just to the boundary of the last file block? */
631 if (offset == 0)
632 return 0;
633
634 /* Truncate is extending the file by 'offset' blocks */
635 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
636 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
637 /* File has no extents at all or has empty last
638 * indirect extent! Create a fake extent... */
639 extent.extLocation.logicalBlockNum = 0;
640 extent.extLocation.partitionReferenceNum = 0;
641 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
642 } else {
643 epos.offset -= adsize;
644 etype = udf_next_aext(inode, &epos, &extent.extLocation,
645 &extent.extLength, 0);
646 extent.extLength |= etype << 30;
647 }
648 err = udf_do_extend_file(inode, &epos, &extent, offset);
649 if (err < 0)
650 goto out;
651 err = 0;
652 iinfo->i_lenExtents = newsize;
653out:
654 brelse(epos.bh);
655 return err;
656}
657
Jan Kara7b0b0932011-12-10 01:43:33 +0100658static sector_t inode_getblk(struct inode *inode, sector_t block,
659 int *err, int *new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200661 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
Jan Karaff116fc2007-05-08 00:35:14 -0700662 struct extent_position prev_epos, cur_epos, next_epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 int count = 0, startnum = 0, endnum = 0;
Jan Kara85d71242007-06-01 00:46:29 -0700664 uint32_t elen = 0, tmpelen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200665 struct kernel_lb_addr eloc, tmpeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 int c = 1;
Jan Kara60448b12007-05-08 00:35:13 -0700667 loff_t lbcount = 0, b_off = 0;
668 uint32_t newblocknum, newblock;
669 sector_t offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800671 struct udf_inode_info *iinfo = UDF_I(inode);
672 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
Jan Kara31170b62007-05-08 00:35:21 -0700673 int lastblock = 0;
Namjae Jeonfb719c52012-10-10 00:09:12 +0900674 bool isBeyondEOF;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
Jan Kara7b0b0932011-12-10 01:43:33 +0100676 *err = 0;
677 *new = 0;
Jan Karaff116fc2007-05-08 00:35:14 -0700678 prev_epos.offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800679 prev_epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700680 prev_epos.bh = NULL;
681 cur_epos = next_epos = prev_epos;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700682 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
684 /* find the extent which contains the block we are looking for.
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700685 alternate between laarr[0] and laarr[1] for locations of the
686 current extent, and the previous extent */
687 do {
688 if (prev_epos.bh != cur_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700689 brelse(prev_epos.bh);
690 get_bh(cur_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700691 prev_epos.bh = cur_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700693 if (cur_epos.bh != next_epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700694 brelse(cur_epos.bh);
695 get_bh(next_epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700696 cur_epos.bh = next_epos.bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 }
698
699 lbcount += elen;
700
Jan Karaff116fc2007-05-08 00:35:14 -0700701 prev_epos.block = cur_epos.block;
702 cur_epos.block = next_epos.block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
Jan Karaff116fc2007-05-08 00:35:14 -0700704 prev_epos.offset = cur_epos.offset;
705 cur_epos.offset = next_epos.offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Marcin Slusarz4b111112008-02-08 04:20:36 -0800707 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
708 if (etype == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 break;
710
711 c = !c;
712
713 laarr[c].extLength = (etype << 30) | elen;
714 laarr[c].extLocation = eloc;
715
716 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
717 pgoal = eloc.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700718 ((elen + inode->i_sb->s_blocksize - 1) >>
719 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700721 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 } while (lbcount + elen <= b_off);
723
724 b_off -= lbcount;
725 offset = b_off >> inode->i_sb->s_blocksize_bits;
Jan Kara85d71242007-06-01 00:46:29 -0700726 /*
727 * Move prev_epos and cur_epos into indirect extent if we are at
728 * the pointer to it
729 */
730 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
731 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732
733 /* if the extent is allocated and recorded, return the block
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700734 if the extent is not a multiple of the blocksize, round up */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700736 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
737 if (elen & (inode->i_sb->s_blocksize - 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 elen = EXT_RECORDED_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700739 ((elen + inode->i_sb->s_blocksize - 1) &
740 ~(inode->i_sb->s_blocksize - 1));
Jan Kara7e49b6f2010-10-22 00:30:26 +0200741 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 }
Jan Kara3bf25cb2007-05-08 00:35:16 -0700743 brelse(prev_epos.bh);
744 brelse(cur_epos.bh);
745 brelse(next_epos.bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200746 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
Jan Kara7b0b0932011-12-10 01:43:33 +0100747 return newblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 }
749
Jan Kara31170b62007-05-08 00:35:21 -0700750 /* Are we beyond EOF? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700751 if (etype == -1) {
Jan Kara31170b62007-05-08 00:35:21 -0700752 int ret;
Namjae Jeonfb719c52012-10-10 00:09:12 +0900753 isBeyondEOF = 1;
Jan Kara31170b62007-05-08 00:35:21 -0700754 if (count) {
755 if (c)
756 laarr[0] = laarr[1];
757 startnum = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700758 } else {
Jan Kara31170b62007-05-08 00:35:21 -0700759 /* Create a fake extent when there's not one */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800760 memset(&laarr[0].extLocation, 0x00,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200761 sizeof(struct kernel_lb_addr));
Jan Kara31170b62007-05-08 00:35:21 -0700762 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
Jan Kara7e49b6f2010-10-22 00:30:26 +0200763 /* Will udf_do_extend_file() create real extent from
Marcin Slusarz4b111112008-02-08 04:20:36 -0800764 a fake one? */
Jan Kara31170b62007-05-08 00:35:21 -0700765 startnum = (offset > 0);
766 }
767 /* Create extents for the hole between EOF and offset */
Jan Kara7e49b6f2010-10-22 00:30:26 +0200768 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
769 if (ret < 0) {
Jan Kara31170b62007-05-08 00:35:21 -0700770 brelse(prev_epos.bh);
771 brelse(cur_epos.bh);
772 brelse(next_epos.bh);
Jan Kara7e49b6f2010-10-22 00:30:26 +0200773 *err = ret;
Jan Kara7b0b0932011-12-10 01:43:33 +0100774 return 0;
Jan Kara31170b62007-05-08 00:35:21 -0700775 }
776 c = 0;
777 offset = 0;
778 count += ret;
779 /* We are not covered by a preallocated extent? */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800780 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
781 EXT_NOT_RECORDED_ALLOCATED) {
Jan Kara31170b62007-05-08 00:35:21 -0700782 /* Is there any real extent? - otherwise we overwrite
783 * the fake one... */
784 if (count)
785 c = !c;
786 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700787 inode->i_sb->s_blocksize;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800788 memset(&laarr[c].extLocation, 0x00,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200789 sizeof(struct kernel_lb_addr));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700790 count++;
Jan Kara31170b62007-05-08 00:35:21 -0700791 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700792 endnum = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 lastblock = 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700794 } else {
Namjae Jeonfb719c52012-10-10 00:09:12 +0900795 isBeyondEOF = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 endnum = startnum = ((count > 2) ? 2 : count);
797
Marcin Slusarz4b111112008-02-08 04:20:36 -0800798 /* if the current extent is in position 0,
799 swap it with the previous */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700800 if (!c && count != 1) {
Jan Kara31170b62007-05-08 00:35:21 -0700801 laarr[2] = laarr[0];
802 laarr[0] = laarr[1];
803 laarr[1] = laarr[2];
804 c = 1;
805 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Marcin Slusarz4b111112008-02-08 04:20:36 -0800807 /* if the current block is located in an extent,
808 read the next extent */
809 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
810 if (etype != -1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700811 laarr[c + 1].extLength = (etype << 30) | elen;
812 laarr[c + 1].extLocation = eloc;
813 count++;
814 startnum++;
815 endnum++;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800816 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 lastblock = 1;
818 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
820 /* if the current extent is not recorded but allocated, get the
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700821 * block in the extent corresponding to the requested block */
Marcin Slusarz4b111112008-02-08 04:20:36 -0800822 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800824 else { /* otherwise, allocate a new block */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800825 if (iinfo->i_next_alloc_block == block)
826 goal = iinfo->i_next_alloc_goal;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700828 if (!goal) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800829 if (!(goal = pgoal)) /* XXX: what was intended here? */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800830 goal = iinfo->i_location.logicalBlockNum + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 }
832
Marcin Slusarz4b111112008-02-08 04:20:36 -0800833 newblocknum = udf_new_block(inode->i_sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800834 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800835 goal, err);
836 if (!newblocknum) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700837 brelse(prev_epos.bh);
Namjae Jeon2fb7d992012-10-10 00:08:56 +0900838 brelse(cur_epos.bh);
839 brelse(next_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 *err = -ENOSPC;
Jan Kara7b0b0932011-12-10 01:43:33 +0100841 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 }
Namjae Jeonfb719c52012-10-10 00:09:12 +0900843 if (isBeyondEOF)
844 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 }
846
Marcin Slusarz4b111112008-02-08 04:20:36 -0800847 /* if the extent the requsted block is located in contains multiple
848 * blocks, split the extent into at most three extents. blocks prior
849 * to requested block, requested block, and blocks after requested
850 * block */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
852
853#ifdef UDF_PREALLOCATE
Jan Kara81056dd2009-07-16 18:02:25 +0200854 /* We preallocate blocks only for regular files. It also makes sense
855 * for directories but there's a problem when to drop the
856 * preallocation. We might use some delayed work for that but I feel
857 * it's overengineering for a filesystem like UDF. */
858 if (S_ISREG(inode->i_mode))
859 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860#endif
861
862 /* merge any continuous blocks in laarr */
863 udf_merge_extents(inode, laarr, &endnum);
864
865 /* write back the new extents, inserting new extents if the new number
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700866 * of extents is greater than the old number, and deleting extents if
867 * the new number of extents is less than the old number */
Jan Karaff116fc2007-05-08 00:35:14 -0700868 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
Jan Kara3bf25cb2007-05-08 00:35:16 -0700870 brelse(prev_epos.bh);
Namjae Jeon2fb7d992012-10-10 00:08:56 +0900871 brelse(cur_epos.bh);
872 brelse(next_epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873
Marcin Slusarz4b111112008-02-08 04:20:36 -0800874 newblock = udf_get_pblock(inode->i_sb, newblocknum,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800875 iinfo->i_location.partitionReferenceNum, 0);
Jan Kara7b0b0932011-12-10 01:43:33 +0100876 if (!newblock) {
877 *err = -EIO;
878 return 0;
879 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 *new = 1;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800881 iinfo->i_next_alloc_block = block;
882 iinfo->i_next_alloc_goal = newblocknum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 inode->i_ctime = current_fs_time(inode->i_sb);
884
885 if (IS_SYNC(inode))
886 udf_sync_inode(inode);
887 else
888 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700889
Jan Kara7b0b0932011-12-10 01:43:33 +0100890 return newblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891}
892
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700893static void udf_split_extents(struct inode *inode, int *c, int offset,
894 int newblocknum,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200895 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700896 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800898 unsigned long blocksize = inode->i_sb->s_blocksize;
899 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
900
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
Marcin Slusarz4b111112008-02-08 04:20:36 -0800902 (laarr[*c].extLength >> 30) ==
903 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 int curr = *c;
905 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800906 blocksize - 1) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 int8_t etype = (laarr[curr].extLength >> 30);
908
Marcin Slusarz4b111112008-02-08 04:20:36 -0800909 if (blen == 1)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700910 ;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800911 else if (!offset || blen == offset + 1) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700912 laarr[curr + 2] = laarr[curr + 1];
913 laarr[curr + 1] = laarr[curr];
914 } else {
915 laarr[curr + 3] = laarr[curr + 1];
916 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 }
918
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700919 if (offset) {
920 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800921 udf_free_blocks(inode->i_sb, inode,
Pekka Enberg97e961f2008-10-15 12:29:03 +0200922 &laarr[curr].extLocation,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800923 0, offset);
924 laarr[curr].extLength =
925 EXT_NOT_RECORDED_NOT_ALLOCATED |
926 (offset << blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 laarr[curr].extLocation.logicalBlockNum = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800928 laarr[curr].extLocation.
929 partitionReferenceNum = 0;
930 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800932 (offset << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700933 curr++;
934 (*c)++;
935 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -0700937
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 laarr[curr].extLocation.logicalBlockNum = newblocknum;
939 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
940 laarr[curr].extLocation.partitionReferenceNum =
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800941 UDF_I(inode)->i_location.partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800943 blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700944 curr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700946 if (blen != offset + 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
Marcin Slusarz4b111112008-02-08 04:20:36 -0800948 laarr[curr].extLocation.logicalBlockNum +=
949 offset + 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700950 laarr[curr].extLength = (etype << 30) |
Marcin Slusarz4b111112008-02-08 04:20:36 -0800951 ((blen - (offset + 1)) << blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700952 curr++;
953 (*endnum)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 }
955 }
956}
957
958static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200959 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700960 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961{
962 int start, length = 0, currlength = 0, i;
963
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700964 if (*endnum >= (c + 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 if (!lastblock)
966 return;
967 else
968 start = c;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700969 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800970 if ((laarr[c + 1].extLength >> 30) ==
971 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700972 start = c + 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800973 length = currlength =
974 (((laarr[c + 1].extLength &
975 UDF_EXTENT_LENGTH_MASK) +
976 inode->i_sb->s_blocksize - 1) >>
977 inode->i_sb->s_blocksize_bits);
978 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 start = c;
980 }
981
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700982 for (i = start + 1; i <= *endnum; i++) {
983 if (i == *endnum) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 if (lastblock)
985 length += UDF_DEFAULT_PREALLOC_BLOCKS;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800986 } else if ((laarr[i].extLength >> 30) ==
987 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
988 length += (((laarr[i].extLength &
989 UDF_EXTENT_LENGTH_MASK) +
990 inode->i_sb->s_blocksize - 1) >>
991 inode->i_sb->s_blocksize_bits);
992 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 break;
994 }
995
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700996 if (length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 int next = laarr[start].extLocation.logicalBlockNum +
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700998 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800999 inode->i_sb->s_blocksize - 1) >>
1000 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001002 laarr[start].extLocation.partitionReferenceNum,
1003 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
1004 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
1005 currlength);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001006 if (numalloc) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001007 if (start == (c + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 laarr[start].extLength +=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001009 (numalloc <<
1010 inode->i_sb->s_blocksize_bits);
1011 else {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001012 memmove(&laarr[c + 2], &laarr[c + 1],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001013 sizeof(struct long_ad) * (*endnum - (c + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001014 (*endnum)++;
1015 laarr[c + 1].extLocation.logicalBlockNum = next;
1016 laarr[c + 1].extLocation.partitionReferenceNum =
Marcin Slusarz4b111112008-02-08 04:20:36 -08001017 laarr[c].extLocation.
1018 partitionReferenceNum;
1019 laarr[c + 1].extLength =
1020 EXT_NOT_RECORDED_ALLOCATED |
1021 (numalloc <<
1022 inode->i_sb->s_blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001023 start = c + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 }
1025
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001026 for (i = start + 1; numalloc && i < *endnum; i++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001027 int elen = ((laarr[i].extLength &
1028 UDF_EXTENT_LENGTH_MASK) +
1029 inode->i_sb->s_blocksize - 1) >>
1030 inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001032 if (elen > numalloc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 laarr[i].extLength -=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001034 (numalloc <<
1035 inode->i_sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 numalloc = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001037 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 numalloc -= elen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001039 if (*endnum > (i + 1))
Marcin Slusarz4b111112008-02-08 04:20:36 -08001040 memmove(&laarr[i],
1041 &laarr[i + 1],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001042 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001043 (*endnum - (i + 1)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001044 i--;
1045 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 }
1047 }
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001048 UDF_I(inode)->i_lenExtents +=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001049 numalloc << inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 }
1051 }
1052}
1053
1054static void udf_merge_extents(struct inode *inode,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001055 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001056 int *endnum)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057{
1058 int i;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001059 unsigned long blocksize = inode->i_sb->s_blocksize;
1060 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001062 for (i = 0; i < (*endnum - 1); i++) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001063 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
1064 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
Marcin Slusarz4b111112008-02-08 04:20:36 -08001066 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
1067 (((li->extLength >> 30) ==
1068 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1069 ((lip1->extLocation.logicalBlockNum -
1070 li->extLocation.logicalBlockNum) ==
1071 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1072 blocksize - 1) >> blocksize_bits)))) {
1073
1074 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1075 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1076 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1077 lip1->extLength = (lip1->extLength -
1078 (li->extLength &
1079 UDF_EXTENT_LENGTH_MASK) +
1080 UDF_EXTENT_LENGTH_MASK) &
1081 ~(blocksize - 1);
1082 li->extLength = (li->extLength &
1083 UDF_EXTENT_FLAG_MASK) +
1084 (UDF_EXTENT_LENGTH_MASK + 1) -
1085 blocksize;
1086 lip1->extLocation.logicalBlockNum =
1087 li->extLocation.logicalBlockNum +
1088 ((li->extLength &
1089 UDF_EXTENT_LENGTH_MASK) >>
1090 blocksize_bits);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001091 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001092 li->extLength = lip1->extLength +
1093 (((li->extLength &
1094 UDF_EXTENT_LENGTH_MASK) +
1095 blocksize - 1) & ~(blocksize - 1));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001096 if (*endnum > (i + 2))
1097 memmove(&laarr[i + 1], &laarr[i + 2],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001098 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001099 (*endnum - (i + 2)));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001100 i--;
1101 (*endnum)--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001103 } else if (((li->extLength >> 30) ==
1104 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1105 ((lip1->extLength >> 30) ==
1106 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02001107 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001108 ((li->extLength &
1109 UDF_EXTENT_LENGTH_MASK) +
1110 blocksize - 1) >> blocksize_bits);
1111 li->extLocation.logicalBlockNum = 0;
1112 li->extLocation.partitionReferenceNum = 0;
1113
1114 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1115 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1116 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1117 lip1->extLength = (lip1->extLength -
1118 (li->extLength &
1119 UDF_EXTENT_LENGTH_MASK) +
1120 UDF_EXTENT_LENGTH_MASK) &
1121 ~(blocksize - 1);
1122 li->extLength = (li->extLength &
1123 UDF_EXTENT_FLAG_MASK) +
1124 (UDF_EXTENT_LENGTH_MASK + 1) -
1125 blocksize;
1126 } else {
1127 li->extLength = lip1->extLength +
1128 (((li->extLength &
1129 UDF_EXTENT_LENGTH_MASK) +
1130 blocksize - 1) & ~(blocksize - 1));
1131 if (*endnum > (i + 2))
1132 memmove(&laarr[i + 1], &laarr[i + 2],
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001133 sizeof(struct long_ad) *
Marcin Slusarz4b111112008-02-08 04:20:36 -08001134 (*endnum - (i + 2)));
1135 i--;
1136 (*endnum)--;
1137 }
1138 } else if ((li->extLength >> 30) ==
1139 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1140 udf_free_blocks(inode->i_sb, inode,
Pekka Enberg97e961f2008-10-15 12:29:03 +02001141 &li->extLocation, 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001142 ((li->extLength &
1143 UDF_EXTENT_LENGTH_MASK) +
1144 blocksize - 1) >> blocksize_bits);
1145 li->extLocation.logicalBlockNum = 0;
1146 li->extLocation.partitionReferenceNum = 0;
1147 li->extLength = (li->extLength &
1148 UDF_EXTENT_LENGTH_MASK) |
1149 EXT_NOT_RECORDED_NOT_ALLOCATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 }
1151 }
1152}
1153
1154static void udf_update_extents(struct inode *inode,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001155 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001156 int startnum, int endnum,
1157 struct extent_position *epos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158{
1159 int start = 0, i;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001160 struct kernel_lb_addr tmploc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 uint32_t tmplen;
1162
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001163 if (startnum > endnum) {
1164 for (i = 0; i < (startnum - endnum); i++)
Jan Karaff116fc2007-05-08 00:35:14 -07001165 udf_delete_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001166 laarr[i].extLength);
1167 } else if (startnum < endnum) {
1168 for (i = 0; i < (endnum - startnum); i++) {
Jan Karaff116fc2007-05-08 00:35:14 -07001169 udf_insert_aext(inode, *epos, laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001170 laarr[i].extLength);
Jan Karaff116fc2007-05-08 00:35:14 -07001171 udf_next_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001172 &laarr[i].extLength, 1);
1173 start++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 }
1175 }
1176
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001177 for (i = start; i < endnum; i++) {
Jan Karaff116fc2007-05-08 00:35:14 -07001178 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001179 udf_write_aext(inode, epos, &laarr[i].extLocation,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001180 laarr[i].extLength, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 }
1182}
1183
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001184struct buffer_head *udf_bread(struct inode *inode, int block,
1185 int create, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001187 struct buffer_head *bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188
1189 bh = udf_getblk(inode, block, create, err);
1190 if (!bh)
1191 return NULL;
1192
1193 if (buffer_uptodate(bh))
1194 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001195
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 ll_rw_block(READ, 1, &bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001197
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 wait_on_buffer(bh);
1199 if (buffer_uptodate(bh))
1200 return bh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001201
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 brelse(bh);
1203 *err = -EIO;
1204 return NULL;
1205}
1206
Jan Kara7e49b6f2010-10-22 00:30:26 +02001207int udf_setsize(struct inode *inode, loff_t newsize)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001210 struct udf_inode_info *iinfo;
Jan Kara7e49b6f2010-10-22 00:30:26 +02001211 int bsize = 1 << inode->i_blkbits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
1213 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001214 S_ISLNK(inode->i_mode)))
Jan Kara7e49b6f2010-10-22 00:30:26 +02001215 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
Jan Kara7e49b6f2010-10-22 00:30:26 +02001217 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001219 iinfo = UDF_I(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001220 if (newsize > inode->i_size) {
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001221 down_write(&iinfo->i_data_sem);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001222 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1223 if (bsize <
1224 (udf_file_entry_alloc_offset(inode) + newsize)) {
1225 err = udf_expand_file_adinicb(inode);
Jan Karad2eb8c32011-12-10 02:30:48 +01001226 if (err)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001227 return err;
Jan Karad2eb8c32011-12-10 02:30:48 +01001228 down_write(&iinfo->i_data_sem);
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001229 } else {
Jan Kara7e49b6f2010-10-22 00:30:26 +02001230 iinfo->i_lenAlloc = newsize;
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001231 goto set_size;
1232 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 }
Jan Kara7e49b6f2010-10-22 00:30:26 +02001234 err = udf_extend_file(inode, newsize);
1235 if (err) {
1236 up_write(&iinfo->i_data_sem);
1237 return err;
1238 }
Ian Abbottbb2b6d12012-07-23 16:39:29 +00001239set_size:
Jan Kara7e49b6f2010-10-22 00:30:26 +02001240 truncate_setsize(inode, newsize);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001241 up_write(&iinfo->i_data_sem);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001242 } else {
Jan Kara7e49b6f2010-10-22 00:30:26 +02001243 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1244 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +09001245 udf_clear_extent_cache(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001246 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1247 0x00, bsize - newsize -
1248 udf_file_entry_alloc_offset(inode));
1249 iinfo->i_lenAlloc = newsize;
1250 truncate_setsize(inode, newsize);
1251 up_write(&iinfo->i_data_sem);
1252 goto update_time;
1253 }
1254 err = block_truncate_page(inode->i_mapping, newsize,
1255 udf_get_block);
1256 if (err)
1257 return err;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001258 down_write(&iinfo->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +09001259 udf_clear_extent_cache(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001260 truncate_setsize(inode, newsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 udf_truncate_extents(inode);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001262 up_write(&iinfo->i_data_sem);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001263 }
Jan Kara7e49b6f2010-10-22 00:30:26 +02001264update_time:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1266 if (IS_SYNC(inode))
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001267 udf_sync_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 else
1269 mark_inode_dirty(inode);
Jan Kara7e49b6f2010-10-22 00:30:26 +02001270 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271}
1272
Jan Karac03aa9f2014-09-04 14:06:55 +02001273/*
1274 * Maximum length of linked list formed by ICB hierarchy. The chosen number is
1275 * arbitrary - just that we hopefully don't limit any real use of rewritten
1276 * inode on write-once media but avoid looping for too long on corrupted media.
1277 */
1278#define UDF_MAX_ICB_NESTING 1024
1279
Jan Kara6d3d5e82014-09-04 16:15:51 +02001280static int udf_read_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281{
1282 struct buffer_head *bh = NULL;
1283 struct fileEntry *fe;
Jan Karabb7720a02014-09-04 13:32:50 +02001284 struct extendedFileEntry *efe;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 uint16_t ident;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001286 struct udf_inode_info *iinfo = UDF_I(inode);
Jan Karabb7720a02014-09-04 13:32:50 +02001287 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001288 struct kernel_lb_addr *iloc = &iinfo->i_location;
Jan Karabb7720a02014-09-04 13:32:50 +02001289 unsigned int link_count;
Jan Karac03aa9f2014-09-04 14:06:55 +02001290 unsigned int indirections = 0;
Jan Kara6d3d5e82014-09-04 16:15:51 +02001291 int ret = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292
Jan Karac03aa9f2014-09-04 14:06:55 +02001293reread:
Jan Kara6d3d5e82014-09-04 16:15:51 +02001294 if (iloc->logicalBlockNum >=
1295 sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) {
1296 udf_debug("block=%d, partition=%d out of range\n",
1297 iloc->logicalBlockNum, iloc->partitionReferenceNum);
1298 return -EIO;
1299 }
1300
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 /*
1302 * Set defaults, but the inode is still incomplete!
1303 * Note: get_new_inode() sets the following on a new inode:
1304 * i_sb = sb
1305 * i_no = ino
1306 * i_flags = sb->s_flags
1307 * i_state = 0
1308 * clean_inode(): zero fills and sets
1309 * i_count = 1
1310 * i_nlink = 1
1311 * i_op = NULL;
1312 */
Jan Kara6d3d5e82014-09-04 16:15:51 +02001313 bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001314 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07001315 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001316 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 }
1318
1319 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001320 ident != TAG_IDENT_USE) {
Joe Perches78ace702011-10-10 01:08:05 -07001321 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1322 inode->i_ino, ident);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001323 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 }
1325
1326 fe = (struct fileEntry *)bh->b_data;
Jan Karabb7720a02014-09-04 13:32:50 +02001327 efe = (struct extendedFileEntry *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001329 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001330 struct buffer_head *ibh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331
Jan Kara6d3d5e82014-09-04 16:15:51 +02001332 ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident);
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001333 if (ident == TAG_IDENT_IE && ibh) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001334 struct kernel_lb_addr loc;
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001335 struct indirectEntry *ie;
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001336
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001337 ie = (struct indirectEntry *)ibh->b_data;
1338 loc = lelb_to_cpu(ie->indirectICB.extLocation);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001339
Jan Karac03aa9f2014-09-04 14:06:55 +02001340 if (ie->indirectICB.extLength) {
Jan Karac03aa9f2014-09-04 14:06:55 +02001341 brelse(ibh);
1342 memcpy(&iinfo->i_location, &loc,
1343 sizeof(struct kernel_lb_addr));
1344 if (++indirections > UDF_MAX_ICB_NESTING) {
1345 udf_err(inode->i_sb,
1346 "too many ICBs in ICB hierarchy"
1347 " (max %d supported)\n",
1348 UDF_MAX_ICB_NESTING);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001349 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001350 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001351 brelse(bh);
Jan Karac03aa9f2014-09-04 14:06:55 +02001352 goto reread;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001354 }
marcin.slusarz@gmail.com1ab92782008-01-30 22:03:58 +01001355 brelse(ibh);
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001356 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
Joe Perches78ace702011-10-10 01:08:05 -07001357 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1358 le16_to_cpu(fe->icbTag.strategyType));
Jan Kara6d3d5e82014-09-04 16:15:51 +02001359 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 }
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001361 if (fe->icbTag.strategyType == cpu_to_le16(4))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001362 iinfo->i_strat4096 = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001363 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001364 iinfo->i_strat4096 = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001366 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
Marcin Slusarz4b111112008-02-08 04:20:36 -08001367 ICBTAG_FLAG_AD_MASK;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001368 iinfo->i_unique = 0;
1369 iinfo->i_lenEAttr = 0;
1370 iinfo->i_lenExtents = 0;
1371 iinfo->i_lenAlloc = 0;
1372 iinfo->i_next_alloc_block = 0;
1373 iinfo->i_next_alloc_goal = 0;
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001374 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001375 iinfo->i_efe = 1;
1376 iinfo->i_use = 0;
Jan Kara6d3d5e82014-09-04 16:15:51 +02001377 ret = udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1378 sizeof(struct extendedFileEntry));
1379 if (ret)
1380 goto out;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001381 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001382 bh->b_data + sizeof(struct extendedFileEntry),
1383 inode->i_sb->s_blocksize -
1384 sizeof(struct extendedFileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001385 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001386 iinfo->i_efe = 0;
1387 iinfo->i_use = 0;
Jan Kara6d3d5e82014-09-04 16:15:51 +02001388 ret = udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1389 sizeof(struct fileEntry));
1390 if (ret)
1391 goto out;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001392 memcpy(iinfo->i_ext.i_data,
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001393 bh->b_data + sizeof(struct fileEntry),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001394 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Marcin Slusarz5e0f0012008-02-08 04:20:41 -08001395 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001396 iinfo->i_efe = 0;
1397 iinfo->i_use = 1;
1398 iinfo->i_lenAlloc = le32_to_cpu(
Marcin Slusarz4b111112008-02-08 04:20:36 -08001399 ((struct unallocSpaceEntry *)bh->b_data)->
1400 lengthAllocDescs);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001401 ret = udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1402 sizeof(struct unallocSpaceEntry));
1403 if (ret)
1404 goto out;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001405 memcpy(iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001406 bh->b_data + sizeof(struct unallocSpaceEntry),
1407 inode->i_sb->s_blocksize -
1408 sizeof(struct unallocSpaceEntry));
Jan Kara6d3d5e82014-09-04 16:15:51 +02001409 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 }
1411
Jan Kara6d3d5e82014-09-04 16:15:51 +02001412 ret = -EIO;
Jan Karac03cad22010-10-20 22:17:28 +02001413 read_lock(&sbi->s_cred_lock);
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001414 i_uid_write(inode, le32_to_cpu(fe->uid));
1415 if (!uid_valid(inode->i_uid) ||
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001416 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1417 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001418 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001420 i_gid_write(inode, le32_to_cpu(fe->gid));
1421 if (!gid_valid(inode->i_gid) ||
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -07001422 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1423 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
Phillip Susi4d6660e2006-03-07 21:55:24 -08001424 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001426 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001427 sbi->s_fmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001428 inode->i_mode = sbi->s_fmode;
1429 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001430 sbi->s_dmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001431 inode->i_mode = sbi->s_dmode;
1432 else
1433 inode->i_mode = udf_convert_permissions(fe);
1434 inode->i_mode &= ~sbi->s_umask;
Jan Karac03cad22010-10-20 22:17:28 +02001435 read_unlock(&sbi->s_cred_lock);
1436
Miklos Szeredibfe86842011-10-28 14:13:29 +02001437 link_count = le16_to_cpu(fe->fileLinkCount);
Jan Kara4071b912014-09-04 16:19:47 +02001438 if (!link_count) {
1439 ret = -ESTALE;
1440 goto out;
1441 }
Miklos Szeredibfe86842011-10-28 14:13:29 +02001442 set_nlink(inode, link_count);
Jan Karac03cad22010-10-20 22:17:28 +02001443
1444 inode->i_size = le64_to_cpu(fe->informationLength);
1445 iinfo->i_lenExtents = inode->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001447 if (iinfo->i_efe == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001449 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
Marcin Slusarz56774802008-02-10 11:25:31 +01001451 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001452 inode->i_atime = sbi->s_record_time;
1453
Marcin Slusarz56774802008-02-10 11:25:31 +01001454 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1455 fe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001456 inode->i_mtime = sbi->s_record_time;
1457
Marcin Slusarz56774802008-02-10 11:25:31 +01001458 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001459 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001461 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1462 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1463 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001464 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001465 } else {
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001466 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001467 (inode->i_sb->s_blocksize_bits - 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468
Marcin Slusarz56774802008-02-10 11:25:31 +01001469 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001470 inode->i_atime = sbi->s_record_time;
1471
Marcin Slusarz56774802008-02-10 11:25:31 +01001472 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1473 efe->modificationTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001474 inode->i_mtime = sbi->s_record_time;
1475
Marcin Slusarz56774802008-02-10 11:25:31 +01001476 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001477 iinfo->i_crtime = sbi->s_record_time;
1478
Marcin Slusarz56774802008-02-10 11:25:31 +01001479 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +01001480 inode->i_ctime = sbi->s_record_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001482 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1483 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1484 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001485 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 }
Jan Kara470cca52014-09-04 16:26:19 +02001487 inode->i_generation = iinfo->i_unique;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001489 switch (fe->icbTag.fileType) {
1490 case ICBTAG_FILE_TYPE_DIRECTORY:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001491 inode->i_op = &udf_dir_inode_operations;
1492 inode->i_fop = &udf_dir_operations;
1493 inode->i_mode |= S_IFDIR;
1494 inc_nlink(inode);
1495 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001496 case ICBTAG_FILE_TYPE_REALTIME:
1497 case ICBTAG_FILE_TYPE_REGULAR:
1498 case ICBTAG_FILE_TYPE_UNDEF:
Jan Kara742e1792008-04-08 01:17:52 +02001499 case ICBTAG_FILE_TYPE_VAT20:
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001500 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001501 inode->i_data.a_ops = &udf_adinicb_aops;
1502 else
1503 inode->i_data.a_ops = &udf_aops;
1504 inode->i_op = &udf_file_inode_operations;
1505 inode->i_fop = &udf_file_operations;
1506 inode->i_mode |= S_IFREG;
1507 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001508 case ICBTAG_FILE_TYPE_BLOCK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001509 inode->i_mode |= S_IFBLK;
1510 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001511 case ICBTAG_FILE_TYPE_CHAR:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001512 inode->i_mode |= S_IFCHR;
1513 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001514 case ICBTAG_FILE_TYPE_FIFO:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001515 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1516 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001517 case ICBTAG_FILE_TYPE_SOCKET:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001518 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1519 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001520 case ICBTAG_FILE_TYPE_SYMLINK:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001521 inode->i_data.a_ops = &udf_symlink_aops;
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001522 inode->i_op = &udf_symlink_inode_operations;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001523 inode->i_mode = S_IFLNK | S_IRWXUGO;
1524 break;
Jan Karabfb257a2008-04-08 20:37:21 +02001525 case ICBTAG_FILE_TYPE_MAIN:
1526 udf_debug("METADATA FILE-----\n");
1527 break;
1528 case ICBTAG_FILE_TYPE_MIRROR:
1529 udf_debug("METADATA MIRROR FILE-----\n");
1530 break;
1531 case ICBTAG_FILE_TYPE_BITMAP:
1532 udf_debug("METADATA BITMAP FILE-----\n");
1533 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001534 default:
Joe Perches78ace702011-10-10 01:08:05 -07001535 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1536 inode->i_ino, fe->icbTag.fileType);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001537 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001539 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001540 struct deviceSpec *dsea =
1541 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001542 if (dsea) {
1543 init_special_inode(inode, inode->i_mode,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001544 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1545 le32_to_cpu(dsea->minorDeviceIdent)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 /* Developer ID ??? */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001547 } else
Jan Kara6d3d5e82014-09-04 16:15:51 +02001548 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001550 ret = 0;
1551out:
Jan Karabb7720a02014-09-04 13:32:50 +02001552 brelse(bh);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001553 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554}
1555
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001556static int udf_alloc_i_data(struct inode *inode, size_t size)
1557{
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001558 struct udf_inode_info *iinfo = UDF_I(inode);
1559 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001560
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001561 if (!iinfo->i_ext.i_data) {
Joe Perches78ace702011-10-10 01:08:05 -07001562 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1563 inode->i_ino);
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07001564 return -ENOMEM;
1565 }
1566
1567 return 0;
1568}
1569
Al Virofaa17292011-07-26 03:18:29 -04001570static umode_t udf_convert_permissions(struct fileEntry *fe)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571{
Al Virofaa17292011-07-26 03:18:29 -04001572 umode_t mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 uint32_t permissions;
1574 uint32_t flags;
1575
1576 permissions = le32_to_cpu(fe->permissions);
1577 flags = le16_to_cpu(fe->icbTag.flags);
1578
Marcin Slusarz4b111112008-02-08 04:20:36 -08001579 mode = ((permissions) & S_IRWXO) |
1580 ((permissions >> 2) & S_IRWXG) |
1581 ((permissions >> 4) & S_IRWXU) |
1582 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1583 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1584 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585
1586 return mode;
1587}
1588
Christoph Hellwiga9185b42010-03-05 09:21:37 +01001589int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590{
Jan Kara49521de2010-10-20 17:42:44 +02001591 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592}
1593
Jan Kara49521de2010-10-20 17:42:44 +02001594static int udf_sync_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595{
1596 return udf_update_inode(inode, 1);
1597}
1598
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001599static int udf_update_inode(struct inode *inode, int do_sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600{
1601 struct buffer_head *bh = NULL;
1602 struct fileEntry *fe;
1603 struct extendedFileEntry *efe;
Steve Nickelb2527bf2012-02-16 12:53:53 -05001604 uint64_t lb_recorded;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 uint32_t udfperms;
1606 uint16_t icbflags;
1607 uint16_t crclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 int err = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001609 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001610 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001611 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612
Jan Kara5833ded2010-01-08 16:52:59 +01001613 bh = udf_tgetblk(inode->i_sb,
1614 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001615 if (!bh) {
Jan Karaaae917c2010-01-08 16:46:29 +01001616 udf_debug("getblk failure\n");
1617 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 }
1619
Jan Karaaae917c2010-01-08 16:46:29 +01001620 lock_buffer(bh);
1621 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 fe = (struct fileEntry *)bh->b_data;
1623 efe = (struct extendedFileEntry *)bh->b_data;
1624
Jan Karaaae917c2010-01-08 16:46:29 +01001625 if (iinfo->i_use) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 struct unallocSpaceEntry *use =
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001627 (struct unallocSpaceEntry *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001629 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001630 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001631 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001632 sizeof(struct unallocSpaceEntry));
Jan Karaaae917c2010-01-08 16:46:29 +01001633 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1634 use->descTag.tagLocation =
1635 cpu_to_le32(iinfo->i_location.logicalBlockNum);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001636 crclen = sizeof(struct unallocSpaceEntry) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001637 iinfo->i_lenAlloc - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638 use->descTag.descCRCLength = cpu_to_le16(crclen);
Bob Copelandf845fce2008-04-17 09:47:48 +02001639 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001640 sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001641 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001642 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643
Jan Karaaae917c2010-01-08 16:46:29 +01001644 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 }
1646
Phillip Susi4d6660e2006-03-07 21:55:24 -08001647 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1648 fe->uid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001649 else
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001650 fe->uid = cpu_to_le32(i_uid_read(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651
Phillip Susi4d6660e2006-03-07 21:55:24 -08001652 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1653 fe->gid = cpu_to_le32(-1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001654 else
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08001655 fe->gid = cpu_to_le32(i_gid_read(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656
Marcin Slusarz4b111112008-02-08 04:20:36 -08001657 udfperms = ((inode->i_mode & S_IRWXO)) |
1658 ((inode->i_mode & S_IRWXG) << 2) |
1659 ((inode->i_mode & S_IRWXU) << 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Marcin Slusarz4b111112008-02-08 04:20:36 -08001661 udfperms |= (le32_to_cpu(fe->permissions) &
1662 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1663 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1664 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 fe->permissions = cpu_to_le32(udfperms);
1666
Jan Kara8a70ee32014-09-04 11:47:51 +02001667 if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1669 else
1670 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1671
1672 fe->informationLength = cpu_to_le64(inode->i_size);
1673
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001674 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001675 struct regid *eid;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001676 struct deviceSpec *dsea =
1677 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001678 if (!dsea) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 dsea = (struct deviceSpec *)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001680 udf_add_extendedattr(inode,
1681 sizeof(struct deviceSpec) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001682 sizeof(struct regid), 12, 0x3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 dsea->attrType = cpu_to_le32(12);
1684 dsea->attrSubtype = 1;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001685 dsea->attrLength = cpu_to_le32(
1686 sizeof(struct deviceSpec) +
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001687 sizeof(struct regid));
1688 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 }
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001690 eid = (struct regid *)dsea->impUse;
1691 memset(eid, 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692 strcpy(eid->ident, UDF_ID_DEVELOPER);
1693 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1694 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1695 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1696 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1697 }
1698
Steve Nickelb2527bf2012-02-16 12:53:53 -05001699 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1700 lb_recorded = 0; /* No extents => no blocks! */
1701 else
1702 lb_recorded =
1703 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1704 (blocksize_bits - 9);
1705
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001706 if (iinfo->i_efe == 0) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001707 memcpy(bh->b_data + sizeof(struct fileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001708 iinfo->i_ext.i_data,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001709 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
Steve Nickelb2527bf2012-02-16 12:53:53 -05001710 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711
Marcin Slusarz56774802008-02-10 11:25:31 +01001712 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1713 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1714 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001715 memset(&(fe->impIdent), 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1717 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1718 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001719 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1720 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1721 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001722 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1724 crclen = sizeof(struct fileEntry);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001725 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001726 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001727 iinfo->i_ext.i_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001728 inode->i_sb->s_blocksize -
1729 sizeof(struct extendedFileEntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 efe->objectSize = cpu_to_le64(inode->i_size);
Steve Nickelb2527bf2012-02-16 12:53:53 -05001731 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001733 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1734 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1735 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1736 iinfo->i_crtime = inode->i_atime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001737
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001738 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1739 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1740 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1741 iinfo->i_crtime = inode->i_mtime;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001742
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001743 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1744 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1745 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1746 iinfo->i_crtime = inode->i_ctime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747
Marcin Slusarz56774802008-02-10 11:25:31 +01001748 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1749 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1750 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1751 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001753 memset(&(efe->impIdent), 0, sizeof(struct regid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1755 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1756 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001757 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1758 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1759 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
Steve Nickeld5e2cf02012-02-14 00:28:42 -05001760 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1762 crclen = sizeof(struct extendedFileEntry);
1763 }
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001764 if (iinfo->i_strat4096) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 fe->icbTag.strategyType = cpu_to_le16(4096);
1766 fe->icbTag.strategyParameter = cpu_to_le16(1);
1767 fe->icbTag.numEntries = cpu_to_le16(2);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001768 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 fe->icbTag.strategyType = cpu_to_le16(4);
1770 fe->icbTag.numEntries = cpu_to_le16(1);
1771 }
1772
1773 if (S_ISDIR(inode->i_mode))
1774 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1775 else if (S_ISREG(inode->i_mode))
1776 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1777 else if (S_ISLNK(inode->i_mode))
1778 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1779 else if (S_ISBLK(inode->i_mode))
1780 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1781 else if (S_ISCHR(inode->i_mode))
1782 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1783 else if (S_ISFIFO(inode->i_mode))
1784 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1785 else if (S_ISSOCK(inode->i_mode))
1786 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1787
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001788 icbflags = iinfo->i_alloc_type |
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001789 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1790 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1791 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1792 (le16_to_cpu(fe->icbTag.flags) &
1793 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1794 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795
1796 fe->icbTag.flags = cpu_to_le16(icbflags);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001797 if (sbi->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 fe->descTag.descVersion = cpu_to_le16(3);
1799 else
1800 fe->descTag.descVersion = cpu_to_le16(2);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001801 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001802 fe->descTag.tagLocation = cpu_to_le32(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001803 iinfo->i_location.logicalBlockNum);
Jan Karaaae917c2010-01-08 16:46:29 +01001804 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 fe->descTag.descCRCLength = cpu_to_le16(crclen);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001806 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001807 crclen));
Marcin Slusarz3f2587b2008-02-08 04:20:39 -08001808 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809
Jan Karaaae917c2010-01-08 16:46:29 +01001810out:
Jan Kara5833ded2010-01-08 16:52:59 +01001811 set_buffer_uptodate(bh);
Jan Karaaae917c2010-01-08 16:46:29 +01001812 unlock_buffer(bh);
1813
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 /* write the data blocks */
1815 mark_buffer_dirty(bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001816 if (do_sync) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 sync_dirty_buffer(bh);
Jan Karaaae917c2010-01-08 16:46:29 +01001818 if (buffer_write_io_error(bh)) {
Joe Perches78ace702011-10-10 01:08:05 -07001819 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1820 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821 err = -EIO;
1822 }
1823 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001824 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001825
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 return err;
1827}
1828
Pekka Enberg97e961f2008-10-15 12:29:03 +02001829struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830{
1831 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1832 struct inode *inode = iget_locked(sb, block);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001833 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834
1835 if (!inode)
Jan Kara6d3d5e82014-09-04 16:15:51 +02001836 return ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837
Jan Kara6d3d5e82014-09-04 16:15:51 +02001838 if (!(inode->i_state & I_NEW))
1839 return inode;
1840
1841 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1842 err = udf_read_inode(inode);
1843 if (err < 0) {
1844 iget_failed(inode);
1845 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001847 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848
1849 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850}
1851
Jan Kara7e49b6f2010-10-22 00:30:26 +02001852int udf_add_aext(struct inode *inode, struct extent_position *epos,
1853 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854{
1855 int adsize;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001856 struct short_ad *sad = NULL;
1857 struct long_ad *lad = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 struct allocExtDesc *aed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 uint8_t *ptr;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001860 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861
Jan Karaff116fc2007-05-08 00:35:14 -07001862 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001863 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001864 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001865 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 else
Jan Karaff116fc2007-05-08 00:35:14 -07001867 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001869 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001870 adsize = sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001871 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001872 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 else
Jan Kara7e49b6f2010-10-22 00:30:26 +02001874 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001876 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
Al Viro391e8bb2010-01-31 21:28:48 -05001877 unsigned char *sptr, *dptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 struct buffer_head *nbh;
1879 int err, loffset;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001880 struct kernel_lb_addr obloc = epos->block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881
Marcin Slusarz4b111112008-02-08 04:20:36 -08001882 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1883 obloc.partitionReferenceNum,
1884 obloc.logicalBlockNum, &err);
1885 if (!epos->block.logicalBlockNum)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001886 return -ENOSPC;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001887 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
Pekka Enberg97e961f2008-10-15 12:29:03 +02001888 &epos->block,
Marcin Slusarz4b111112008-02-08 04:20:36 -08001889 0));
1890 if (!nbh)
Jan Kara7e49b6f2010-10-22 00:30:26 +02001891 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892 lock_buffer(nbh);
1893 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1894 set_buffer_uptodate(nbh);
1895 unlock_buffer(nbh);
1896 mark_buffer_dirty_inode(nbh, inode);
1897
1898 aed = (struct allocExtDesc *)(nbh->b_data);
1899 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
Marcin Slusarz4b111112008-02-08 04:20:36 -08001900 aed->previousAllocExtLocation =
1901 cpu_to_le32(obloc.logicalBlockNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001902 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
Jan Karaff116fc2007-05-08 00:35:14 -07001903 loffset = epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 aed->lengthAllocDescs = cpu_to_le32(adsize);
1905 sptr = ptr - adsize;
1906 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1907 memcpy(dptr, sptr, adsize);
Jan Karaff116fc2007-05-08 00:35:14 -07001908 epos->offset = sizeof(struct allocExtDesc) + adsize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001909 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001910 loffset = epos->offset + adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 aed->lengthAllocDescs = cpu_to_le32(0);
1912 sptr = ptr;
Jan Karaff116fc2007-05-08 00:35:14 -07001913 epos->offset = sizeof(struct allocExtDesc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001915 if (epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07001916 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001917 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001918 } else {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001919 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 mark_inode_dirty(inode);
1921 }
1922 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001923 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001925 epos->block.logicalBlockNum, sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926 else
1927 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001928 epos->block.logicalBlockNum, sizeof(struct tag));
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001929 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001930 case ICBTAG_FLAG_AD_SHORT:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001931 sad = (struct short_ad *)sptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001932 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1933 inode->i_sb->s_blocksize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001934 sad->extPosition =
1935 cpu_to_le32(epos->block.logicalBlockNum);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001936 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001937 case ICBTAG_FLAG_AD_LONG:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001938 lad = (struct long_ad *)sptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001939 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1940 inode->i_sb->s_blocksize);
1941 lad->extLocation = cpu_to_lelb(epos->block);
1942 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1943 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001945 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001946 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001947 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Jan Karaff116fc2007-05-08 00:35:14 -07001948 udf_update_tag(epos->bh->b_data, loffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001950 udf_update_tag(epos->bh->b_data,
1951 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001952 mark_buffer_dirty_inode(epos->bh, inode);
Jan Kara3bf25cb2007-05-08 00:35:16 -07001953 brelse(epos->bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001954 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001956 }
Jan Karaff116fc2007-05-08 00:35:14 -07001957 epos->bh = nbh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958 }
1959
Jan Kara7e49b6f2010-10-22 00:30:26 +02001960 udf_write_aext(inode, epos, eloc, elen, inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001962 if (!epos->bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001963 iinfo->i_lenAlloc += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001965 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07001966 aed = (struct allocExtDesc *)epos->bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01001967 le32_add_cpu(&aed->lengthAllocDescs, adsize);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001968 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1969 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1970 udf_update_tag(epos->bh->b_data,
1971 epos->offset + (inc ? 0 : adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08001973 udf_update_tag(epos->bh->b_data,
1974 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07001975 mark_buffer_dirty_inode(epos->bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976 }
1977
Jan Kara7e49b6f2010-10-22 00:30:26 +02001978 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979}
1980
Jan Kara7e49b6f2010-10-22 00:30:26 +02001981void udf_write_aext(struct inode *inode, struct extent_position *epos,
1982 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983{
1984 int adsize;
1985 uint8_t *ptr;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001986 struct short_ad *sad;
1987 struct long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001988 struct udf_inode_info *iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989
Jan Karaff116fc2007-05-08 00:35:14 -07001990 if (!epos->bh)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001991 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08001992 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001993 iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 else
Jan Karaff116fc2007-05-08 00:35:14 -07001995 ptr = epos->bh->b_data + epos->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001997 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001998 case ICBTAG_FLAG_AD_SHORT:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001999 sad = (struct short_ad *)ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002000 sad->extLength = cpu_to_le32(elen);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002001 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002002 adsize = sizeof(struct short_ad);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002003 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002004 case ICBTAG_FLAG_AD_LONG:
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002005 lad = (struct long_ad *)ptr;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002006 lad->extLength = cpu_to_le32(elen);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002007 lad->extLocation = cpu_to_lelb(*eloc);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002008 memset(lad->impUse, 0x00, sizeof(lad->impUse));
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002009 adsize = sizeof(struct long_ad);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002010 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002011 default:
Jan Kara7e49b6f2010-10-22 00:30:26 +02002012 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 }
2014
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002015 if (epos->bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002016 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002017 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002018 struct allocExtDesc *aed =
2019 (struct allocExtDesc *)epos->bh->b_data;
Jan Karaff116fc2007-05-08 00:35:14 -07002020 udf_update_tag(epos->bh->b_data,
Marcin Slusarz4b111112008-02-08 04:20:36 -08002021 le32_to_cpu(aed->lengthAllocDescs) +
2022 sizeof(struct allocExtDesc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 }
Jan Karaff116fc2007-05-08 00:35:14 -07002024 mark_buffer_dirty_inode(epos->bh, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002025 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002027 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028
2029 if (inc)
Jan Karaff116fc2007-05-08 00:35:14 -07002030 epos->offset += adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031}
2032
Marcin Slusarz4b111112008-02-08 04:20:36 -08002033int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002034 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035{
2036 int8_t etype;
2037
Jan Karaff116fc2007-05-08 00:35:14 -07002038 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002039 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002040 int block;
Jan Karaff116fc2007-05-08 00:35:14 -07002041 epos->block = *eloc;
2042 epos->offset = sizeof(struct allocExtDesc);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002043 brelse(epos->bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002044 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002045 epos->bh = udf_tread(inode->i_sb, block);
2046 if (!epos->bh) {
2047 udf_debug("reading block %d failed!\n", block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 return -1;
2049 }
2050 }
2051
2052 return etype;
2053}
2054
Marcin Slusarz4b111112008-02-08 04:20:36 -08002055int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002056 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057{
2058 int alen;
2059 int8_t etype;
2060 uint8_t *ptr;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002061 struct short_ad *sad;
2062 struct long_ad *lad;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002063 struct udf_inode_info *iinfo = UDF_I(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002064
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002065 if (!epos->bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07002066 if (!epos->offset)
2067 epos->offset = udf_file_entry_alloc_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002068 ptr = iinfo->i_ext.i_data + epos->offset -
Marcin Slusarz4b111112008-02-08 04:20:36 -08002069 udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002070 iinfo->i_lenEAttr;
Marcin Slusarz4b111112008-02-08 04:20:36 -08002071 alen = udf_file_entry_alloc_offset(inode) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002072 iinfo->i_lenAlloc;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002073 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002074 if (!epos->offset)
2075 epos->offset = sizeof(struct allocExtDesc);
2076 ptr = epos->bh->b_data + epos->offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002077 alen = sizeof(struct allocExtDesc) +
Marcin Slusarz4b111112008-02-08 04:20:36 -08002078 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2079 lengthAllocDescs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 }
2081
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002082 switch (iinfo->i_alloc_type) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002083 case ICBTAG_FLAG_AD_SHORT:
Marcin Slusarz4b111112008-02-08 04:20:36 -08002084 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2085 if (!sad)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 return -1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002087 etype = le32_to_cpu(sad->extLength) >> 30;
2088 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002089 eloc->partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002090 iinfo->i_location.partitionReferenceNum;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002091 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2092 break;
2093 case ICBTAG_FLAG_AD_LONG:
Marcin Slusarz4b111112008-02-08 04:20:36 -08002094 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2095 if (!lad)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002096 return -1;
2097 etype = le32_to_cpu(lad->extLength) >> 30;
2098 *eloc = lelb_to_cpu(lad->extLocation);
2099 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2100 break;
2101 default:
Joe Perchesa983f362011-10-10 01:08:07 -07002102 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002103 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104 }
2105
2106 return etype;
2107}
2108
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002109static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002110 struct kernel_lb_addr neloc, uint32_t nelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002112 struct kernel_lb_addr oeloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 uint32_t oelen;
2114 int8_t etype;
2115
Jan Karaff116fc2007-05-08 00:35:14 -07002116 if (epos.bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07002117 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002119 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002120 udf_write_aext(inode, &epos, &neloc, nelen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121 neloc = oeloc;
2122 nelen = (etype << 30) | oelen;
2123 }
Pekka Enberg97e961f2008-10-15 12:29:03 +02002124 udf_add_aext(inode, &epos, &neloc, nelen, 1);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002125 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002126
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127 return (nelen >> 30);
2128}
2129
Marcin Slusarz4b111112008-02-08 04:20:36 -08002130int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002131 struct kernel_lb_addr eloc, uint32_t elen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132{
Jan Karaff116fc2007-05-08 00:35:14 -07002133 struct extent_position oepos;
2134 int adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 int8_t etype;
2136 struct allocExtDesc *aed;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002137 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002139 if (epos.bh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002140 get_bh(epos.bh);
2141 get_bh(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142 }
2143
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002144 iinfo = UDF_I(inode);
2145 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002146 adsize = sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002147 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002148 adsize = sizeof(struct long_ad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 else
2150 adsize = 0;
2151
Jan Karaff116fc2007-05-08 00:35:14 -07002152 oepos = epos;
2153 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154 return -1;
2155
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002156 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002157 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002158 if (oepos.bh != epos.bh) {
Jan Karaff116fc2007-05-08 00:35:14 -07002159 oepos.block = epos.block;
Jan Kara3bf25cb2007-05-08 00:35:16 -07002160 brelse(oepos.bh);
2161 get_bh(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -07002162 oepos.bh = epos.bh;
2163 oepos.offset = epos.offset - adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164 }
2165 }
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002166 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167 elen = 0;
2168
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002169 if (epos.bh != oepos.bh) {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002170 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2171 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2172 udf_write_aext(inode, &oepos, &eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002173 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002174 iinfo->i_lenAlloc -= (adsize * 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002176 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002177 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01002178 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002179 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002180 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08002181 udf_update_tag(oepos.bh->b_data,
2182 oepos.offset - (2 * adsize));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08002184 udf_update_tag(oepos.bh->b_data,
2185 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07002186 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002188 } else {
Pekka Enberg97e961f2008-10-15 12:29:03 +02002189 udf_write_aext(inode, &oepos, &eloc, elen, 1);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002190 if (!oepos.bh) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002191 iinfo->i_lenAlloc -= adsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192 mark_inode_dirty(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002193 } else {
Jan Karaff116fc2007-05-08 00:35:14 -07002194 aed = (struct allocExtDesc *)oepos.bh->b_data;
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +01002195 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002196 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002197 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
Marcin Slusarz4b111112008-02-08 04:20:36 -08002198 udf_update_tag(oepos.bh->b_data,
2199 epos.offset - adsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200 else
Marcin Slusarz4b111112008-02-08 04:20:36 -08002201 udf_update_tag(oepos.bh->b_data,
2202 sizeof(struct allocExtDesc));
Jan Karaff116fc2007-05-08 00:35:14 -07002203 mark_buffer_dirty_inode(oepos.bh, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 }
2205 }
Cyrill Gorcunov647bd612007-07-15 23:39:47 -07002206
Jan Kara3bf25cb2007-05-08 00:35:16 -07002207 brelse(epos.bh);
2208 brelse(oepos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002209
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210 return (elen >> 30);
2211}
2212
Marcin Slusarz4b111112008-02-08 04:20:36 -08002213int8_t inode_bmap(struct inode *inode, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002214 struct extent_position *pos, struct kernel_lb_addr *eloc,
Marcin Slusarz4b111112008-02-08 04:20:36 -08002215 uint32_t *elen, sector_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216{
Marcin Slusarz4b111112008-02-08 04:20:36 -08002217 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002218 loff_t lbcount = 0, bcount =
Marcin Slusarz4b111112008-02-08 04:20:36 -08002219 (loff_t) block << blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220 int8_t etype;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002221 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002223 iinfo = UDF_I(inode);
Namjae Jeon99600052013-01-19 11:17:14 +09002224 if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
2225 pos->offset = 0;
2226 pos->block = iinfo->i_location;
2227 pos->bh = NULL;
2228 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 *elen = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002230 do {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002231 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2232 if (etype == -1) {
2233 *offset = (bcount - lbcount) >> blocksize_bits;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08002234 iinfo->i_lenExtents = lbcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002235 return -1;
2236 }
2237 lbcount += *elen;
2238 } while (lbcount <= bcount);
Namjae Jeon99600052013-01-19 11:17:14 +09002239 /* update extent cache */
2240 udf_update_extent_cache(inode, lbcount - *elen, pos, 1);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002241 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242
2243 return etype;
2244}
2245
Jan Kara60448b12007-05-08 00:35:13 -07002246long udf_block_map(struct inode *inode, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002247{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002248 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -07002249 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -07002250 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002251 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252 int ret;
2253
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01002254 down_read(&UDF_I(inode)->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255
Marcin Slusarz4b111112008-02-08 04:20:36 -08002256 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2257 (EXT_RECORDED_ALLOCATED >> 30))
Pekka Enberg97e961f2008-10-15 12:29:03 +02002258 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002259 else
2260 ret = 0;
2261
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01002262 up_read(&UDF_I(inode)->i_data_sem);
Jan Kara3bf25cb2007-05-08 00:35:16 -07002263 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264
2265 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2266 return udf_fixed_to_variable(ret);
2267 else
2268 return ret;
2269}