| 1 |
1275 |
phoenix |
/*
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| 2 |
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* inode.c
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| 3 |
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*
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| 4 |
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* PURPOSE
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| 5 |
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* Inode handling routines for the OSTA-UDF(tm) filesystem.
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| 6 |
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*
|
| 7 |
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* CONTACTS
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| 8 |
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* E-mail regarding any portion of the Linux UDF file system should be
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| 9 |
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* directed to the development team mailing list (run by majordomo):
|
| 10 |
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* linux_udf@hpesjro.fc.hp.com
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| 11 |
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*
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| 12 |
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* COPYRIGHT
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| 13 |
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* This file is distributed under the terms of the GNU General Public
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| 14 |
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* License (GPL). Copies of the GPL can be obtained from:
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| 15 |
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* ftp://prep.ai.mit.edu/pub/gnu/GPL
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| 16 |
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* Each contributing author retains all rights to their own work.
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| 17 |
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*
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| 18 |
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* (C) 1998 Dave Boynton
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| 19 |
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* (C) 1998-2001 Ben Fennema
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| 20 |
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* (C) 1999-2000 Stelias Computing Inc
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| 21 |
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*
|
| 22 |
|
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* HISTORY
|
| 23 |
|
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*
|
| 24 |
|
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* 10/04/98 dgb Added rudimentary directory functions
|
| 25 |
|
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* 10/07/98 Fully working udf_block_map! It works!
|
| 26 |
|
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* 11/25/98 bmap altered to better support extents
|
| 27 |
|
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* 12/06/98 blf partition support in udf_iget, udf_block_map and udf_read_inode
|
| 28 |
|
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* 12/12/98 rewrote udf_block_map to handle next extents and descs across
|
| 29 |
|
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* block boundaries (which is not actually allowed)
|
| 30 |
|
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* 12/20/98 added support for strategy 4096
|
| 31 |
|
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* 03/07/99 rewrote udf_block_map (again)
|
| 32 |
|
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* New funcs, inode_bmap, udf_next_aext
|
| 33 |
|
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* 04/19/99 Support for writing device EA's for major/minor #
|
| 34 |
|
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*/
|
| 35 |
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| 36 |
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#include "udfdecl.h"
|
| 37 |
|
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#include <linux/locks.h>
|
| 38 |
|
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#include <linux/mm.h>
|
| 39 |
|
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#include <linux/smp_lock.h>
|
| 40 |
|
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#include <linux/module.h>
|
| 41 |
|
|
|
| 42 |
|
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#include "udf_i.h"
|
| 43 |
|
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#include "udf_sb.h"
|
| 44 |
|
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|
| 45 |
|
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MODULE_AUTHOR("Ben Fennema");
|
| 46 |
|
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MODULE_DESCRIPTION("Universal Disk Format Filesystem");
|
| 47 |
|
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MODULE_LICENSE("GPL");
|
| 48 |
|
|
|
| 49 |
|
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#define EXTENT_MERGE_SIZE 5
|
| 50 |
|
|
|
| 51 |
|
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static mode_t udf_convert_permissions(struct fileEntry *);
|
| 52 |
|
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static int udf_update_inode(struct inode *, int);
|
| 53 |
|
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static void udf_fill_inode(struct inode *, struct buffer_head *);
|
| 54 |
|
|
static struct buffer_head *inode_getblk(struct inode *, long, int *, long *, int *);
|
| 55 |
|
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static void udf_split_extents(struct inode *, int *, int, int,
|
| 56 |
|
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long_ad [EXTENT_MERGE_SIZE], int *);
|
| 57 |
|
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static void udf_prealloc_extents(struct inode *, int, int,
|
| 58 |
|
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long_ad [EXTENT_MERGE_SIZE], int *);
|
| 59 |
|
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static void udf_merge_extents(struct inode *,
|
| 60 |
|
|
long_ad [EXTENT_MERGE_SIZE], int *);
|
| 61 |
|
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static void udf_update_extents(struct inode *,
|
| 62 |
|
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long_ad [EXTENT_MERGE_SIZE], int, int,
|
| 63 |
|
|
lb_addr, uint32_t, struct buffer_head **);
|
| 64 |
|
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static int udf_get_block(struct inode *, long, struct buffer_head *, int);
|
| 65 |
|
|
|
| 66 |
|
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/*
|
| 67 |
|
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* udf_put_inode
|
| 68 |
|
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*
|
| 69 |
|
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* PURPOSE
|
| 70 |
|
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*
|
| 71 |
|
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* DESCRIPTION
|
| 72 |
|
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* This routine is called whenever the kernel no longer needs the inode.
|
| 73 |
|
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*
|
| 74 |
|
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* HISTORY
|
| 75 |
|
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* July 1, 1997 - Andrew E. Mileski
|
| 76 |
|
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* Written, tested, and released.
|
| 77 |
|
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*
|
| 78 |
|
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* Called at each iput()
|
| 79 |
|
|
*/
|
| 80 |
|
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void udf_put_inode(struct inode * inode)
|
| 81 |
|
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{
|
| 82 |
|
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if (!(inode->i_sb->s_flags & MS_RDONLY))
|
| 83 |
|
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{
|
| 84 |
|
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lock_kernel();
|
| 85 |
|
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udf_discard_prealloc(inode);
|
| 86 |
|
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unlock_kernel();
|
| 87 |
|
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}
|
| 88 |
|
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}
|
| 89 |
|
|
|
| 90 |
|
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/*
|
| 91 |
|
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* udf_delete_inode
|
| 92 |
|
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*
|
| 93 |
|
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* PURPOSE
|
| 94 |
|
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* Clean-up before the specified inode is destroyed.
|
| 95 |
|
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*
|
| 96 |
|
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* DESCRIPTION
|
| 97 |
|
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* This routine is called when the kernel destroys an inode structure
|
| 98 |
|
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* ie. when iput() finds i_count == 0.
|
| 99 |
|
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*
|
| 100 |
|
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* HISTORY
|
| 101 |
|
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* July 1, 1997 - Andrew E. Mileski
|
| 102 |
|
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* Written, tested, and released.
|
| 103 |
|
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*
|
| 104 |
|
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* Called at the last iput() if i_nlink is zero.
|
| 105 |
|
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*/
|
| 106 |
|
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void udf_delete_inode(struct inode * inode)
|
| 107 |
|
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{
|
| 108 |
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lock_kernel();
|
| 109 |
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|
| 110 |
|
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if (is_bad_inode(inode))
|
| 111 |
|
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goto no_delete;
|
| 112 |
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|
|
| 113 |
|
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inode->i_size = 0;
|
| 114 |
|
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udf_truncate(inode);
|
| 115 |
|
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udf_update_inode(inode, IS_SYNC(inode));
|
| 116 |
|
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udf_free_inode(inode);
|
| 117 |
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|
|
| 118 |
|
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unlock_kernel();
|
| 119 |
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return;
|
| 120 |
|
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no_delete:
|
| 121 |
|
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unlock_kernel();
|
| 122 |
|
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clear_inode(inode);
|
| 123 |
|
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}
|
| 124 |
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|
| 125 |
|
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void udf_discard_prealloc(struct inode * inode)
|
| 126 |
|
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{
|
| 127 |
|
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if (inode->i_size && inode->i_size != UDF_I_LENEXTENTS(inode) &&
|
| 128 |
|
|
UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB)
|
| 129 |
|
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{
|
| 130 |
|
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udf_truncate_extents(inode);
|
| 131 |
|
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}
|
| 132 |
|
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}
|
| 133 |
|
|
|
| 134 |
|
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static int udf_writepage(struct page *page)
|
| 135 |
|
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{
|
| 136 |
|
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return block_write_full_page(page, udf_get_block);
|
| 137 |
|
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}
|
| 138 |
|
|
|
| 139 |
|
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static int udf_readpage(struct file *file, struct page *page)
|
| 140 |
|
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{
|
| 141 |
|
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return block_read_full_page(page, udf_get_block);
|
| 142 |
|
|
}
|
| 143 |
|
|
|
| 144 |
|
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static int udf_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
|
| 145 |
|
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{
|
| 146 |
|
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return block_prepare_write(page, from, to, udf_get_block);
|
| 147 |
|
|
}
|
| 148 |
|
|
|
| 149 |
|
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static int udf_bmap(struct address_space *mapping, long block)
|
| 150 |
|
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{
|
| 151 |
|
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return generic_block_bmap(mapping,block,udf_get_block);
|
| 152 |
|
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}
|
| 153 |
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|
| 154 |
|
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struct address_space_operations udf_aops = {
|
| 155 |
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readpage: udf_readpage,
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| 156 |
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writepage: udf_writepage,
|
| 157 |
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sync_page: block_sync_page,
|
| 158 |
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prepare_write: udf_prepare_write,
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| 159 |
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commit_write: generic_commit_write,
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| 160 |
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bmap: udf_bmap,
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| 161 |
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};
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| 162 |
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| 163 |
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void udf_expand_file_adinicb(struct inode * inode, int newsize, int * err)
|
| 164 |
|
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{
|
| 165 |
|
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struct buffer_head *bh = NULL;
|
| 166 |
|
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struct page *page;
|
| 167 |
|
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char *kaddr;
|
| 168 |
|
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int block;
|
| 169 |
|
|
|
| 170 |
|
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/* from now on we have normal address_space methods */
|
| 171 |
|
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inode->i_data.a_ops = &udf_aops;
|
| 172 |
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|
|
| 173 |
|
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if (!UDF_I_LENALLOC(inode))
|
| 174 |
|
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{
|
| 175 |
|
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if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
|
| 176 |
|
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UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT;
|
| 177 |
|
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else
|
| 178 |
|
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UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG;
|
| 179 |
|
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mark_inode_dirty(inode);
|
| 180 |
|
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return;
|
| 181 |
|
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}
|
| 182 |
|
|
|
| 183 |
|
|
block = udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0);
|
| 184 |
|
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bh = udf_tread(inode->i_sb, block);
|
| 185 |
|
|
if (!bh)
|
| 186 |
|
|
return;
|
| 187 |
|
|
page = grab_cache_page(inode->i_mapping, 0);
|
| 188 |
|
|
if (!PageLocked(page))
|
| 189 |
|
|
PAGE_BUG(page);
|
| 190 |
|
|
if (!Page_Uptodate(page))
|
| 191 |
|
|
{
|
| 192 |
|
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kaddr = kmap(page);
|
| 193 |
|
|
memset(kaddr + UDF_I_LENALLOC(inode), 0x00,
|
| 194 |
|
|
PAGE_CACHE_SIZE - UDF_I_LENALLOC(inode));
|
| 195 |
|
|
memcpy(kaddr, bh->b_data + udf_file_entry_alloc_offset(inode),
|
| 196 |
|
|
UDF_I_LENALLOC(inode));
|
| 197 |
|
|
flush_dcache_page(page);
|
| 198 |
|
|
SetPageUptodate(page);
|
| 199 |
|
|
kunmap(page);
|
| 200 |
|
|
}
|
| 201 |
|
|
memset(bh->b_data + udf_file_entry_alloc_offset(inode),
|
| 202 |
|
|
0, UDF_I_LENALLOC(inode));
|
| 203 |
|
|
UDF_I_LENALLOC(inode) = 0;
|
| 204 |
|
|
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
|
| 205 |
|
|
UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT;
|
| 206 |
|
|
else
|
| 207 |
|
|
UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG;
|
| 208 |
|
|
mark_buffer_dirty_inode(bh, inode);
|
| 209 |
|
|
udf_release_data(bh);
|
| 210 |
|
|
|
| 211 |
|
|
inode->i_data.a_ops->writepage(page);
|
| 212 |
|
|
page_cache_release(page);
|
| 213 |
|
|
|
| 214 |
|
|
mark_inode_dirty(inode);
|
| 215 |
|
|
inode->i_version ++;
|
| 216 |
|
|
}
|
| 217 |
|
|
|
| 218 |
|
|
struct buffer_head * udf_expand_dir_adinicb(struct inode *inode, int *block, int *err)
|
| 219 |
|
|
{
|
| 220 |
|
|
int newblock;
|
| 221 |
|
|
struct buffer_head *sbh = NULL, *dbh = NULL;
|
| 222 |
|
|
lb_addr bloc, eloc;
|
| 223 |
|
|
uint32_t elen, extoffset;
|
| 224 |
|
|
|
| 225 |
|
|
struct udf_fileident_bh sfibh, dfibh;
|
| 226 |
|
|
loff_t f_pos = udf_ext0_offset(inode) >> 2;
|
| 227 |
|
|
int size = (udf_ext0_offset(inode) + inode->i_size) >> 2;
|
| 228 |
|
|
struct fileIdentDesc cfi, *sfi, *dfi;
|
| 229 |
|
|
|
| 230 |
|
|
if (!inode->i_size)
|
| 231 |
|
|
{
|
| 232 |
|
|
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
|
| 233 |
|
|
UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT;
|
| 234 |
|
|
else
|
| 235 |
|
|
UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG;
|
| 236 |
|
|
mark_inode_dirty(inode);
|
| 237 |
|
|
return NULL;
|
| 238 |
|
|
}
|
| 239 |
|
|
|
| 240 |
|
|
/* alloc block, and copy data to it */
|
| 241 |
|
|
*block = udf_new_block(inode->i_sb, inode,
|
| 242 |
|
|
UDF_I_LOCATION(inode).partitionReferenceNum,
|
| 243 |
|
|
UDF_I_LOCATION(inode).logicalBlockNum, err);
|
| 244 |
|
|
|
| 245 |
|
|
if (!(*block))
|
| 246 |
|
|
return NULL;
|
| 247 |
|
|
newblock = udf_get_pblock(inode->i_sb, *block,
|
| 248 |
|
|
UDF_I_LOCATION(inode).partitionReferenceNum, 0);
|
| 249 |
|
|
if (!newblock)
|
| 250 |
|
|
return NULL;
|
| 251 |
|
|
sbh = udf_tread(inode->i_sb, inode->i_ino);
|
| 252 |
|
|
if (!sbh)
|
| 253 |
|
|
return NULL;
|
| 254 |
|
|
dbh = udf_tgetblk(inode->i_sb, newblock);
|
| 255 |
|
|
if (!dbh)
|
| 256 |
|
|
return NULL;
|
| 257 |
|
|
lock_buffer(dbh);
|
| 258 |
|
|
memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
|
| 259 |
|
|
mark_buffer_uptodate(dbh, 1);
|
| 260 |
|
|
unlock_buffer(dbh);
|
| 261 |
|
|
mark_buffer_dirty_inode(dbh, inode);
|
| 262 |
|
|
|
| 263 |
|
|
sfibh.soffset = sfibh.eoffset = (f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2;
|
| 264 |
|
|
sfibh.sbh = sfibh.ebh = sbh;
|
| 265 |
|
|
dfibh.soffset = dfibh.eoffset = 0;
|
| 266 |
|
|
dfibh.sbh = dfibh.ebh = dbh;
|
| 267 |
|
|
while ( (f_pos < size) )
|
| 268 |
|
|
{
|
| 269 |
|
|
sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, NULL, NULL, NULL, NULL, NULL);
|
| 270 |
|
|
if (!sfi)
|
| 271 |
|
|
{
|
| 272 |
|
|
udf_release_data(sbh);
|
| 273 |
|
|
udf_release_data(dbh);
|
| 274 |
|
|
return NULL;
|
| 275 |
|
|
}
|
| 276 |
|
|
sfi->descTag.tagLocation = *block;
|
| 277 |
|
|
dfibh.soffset = dfibh.eoffset;
|
| 278 |
|
|
dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
|
| 279 |
|
|
dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
|
| 280 |
|
|
if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
|
| 281 |
|
|
sfi->fileIdent + sfi->lengthOfImpUse))
|
| 282 |
|
|
{
|
| 283 |
|
|
udf_release_data(sbh);
|
| 284 |
|
|
udf_release_data(dbh);
|
| 285 |
|
|
return NULL;
|
| 286 |
|
|
}
|
| 287 |
|
|
}
|
| 288 |
|
|
mark_buffer_dirty_inode(dbh, inode);
|
| 289 |
|
|
|
| 290 |
|
|
memset(sbh->b_data + udf_file_entry_alloc_offset(inode),
|
| 291 |
|
|
0, UDF_I_LENALLOC(inode));
|
| 292 |
|
|
|
| 293 |
|
|
UDF_I_LENALLOC(inode) = 0;
|
| 294 |
|
|
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
|
| 295 |
|
|
UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT;
|
| 296 |
|
|
else
|
| 297 |
|
|
UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG;
|
| 298 |
|
|
bloc = UDF_I_LOCATION(inode);
|
| 299 |
|
|
eloc.logicalBlockNum = *block;
|
| 300 |
|
|
eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum;
|
| 301 |
|
|
elen = inode->i_size;
|
| 302 |
|
|
UDF_I_LENEXTENTS(inode) = elen;
|
| 303 |
|
|
extoffset = udf_file_entry_alloc_offset(inode);
|
| 304 |
|
|
udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &sbh, 0);
|
| 305 |
|
|
/* UniqueID stuff */
|
| 306 |
|
|
|
| 307 |
|
|
mark_buffer_dirty(sbh);
|
| 308 |
|
|
udf_release_data(sbh);
|
| 309 |
|
|
mark_inode_dirty(inode);
|
| 310 |
|
|
inode->i_version ++;
|
| 311 |
|
|
return dbh;
|
| 312 |
|
|
}
|
| 313 |
|
|
|
| 314 |
|
|
static int udf_get_block(struct inode *inode, long block, struct buffer_head *bh_result, int create)
|
| 315 |
|
|
{
|
| 316 |
|
|
int err, new;
|
| 317 |
|
|
struct buffer_head *bh;
|
| 318 |
|
|
unsigned long phys;
|
| 319 |
|
|
|
| 320 |
|
|
if (!create)
|
| 321 |
|
|
{
|
| 322 |
|
|
phys = udf_block_map(inode, block);
|
| 323 |
|
|
if (phys)
|
| 324 |
|
|
{
|
| 325 |
|
|
bh_result->b_dev = inode->i_dev;
|
| 326 |
|
|
bh_result->b_blocknr = phys;
|
| 327 |
|
|
bh_result->b_state |= (1UL << BH_Mapped);
|
| 328 |
|
|
}
|
| 329 |
|
|
return 0;
|
| 330 |
|
|
}
|
| 331 |
|
|
|
| 332 |
|
|
err = -EIO;
|
| 333 |
|
|
new = 0;
|
| 334 |
|
|
bh = NULL;
|
| 335 |
|
|
|
| 336 |
|
|
lock_kernel();
|
| 337 |
|
|
|
| 338 |
|
|
if (block < 0)
|
| 339 |
|
|
goto abort_negative;
|
| 340 |
|
|
|
| 341 |
|
|
if (block == UDF_I_NEXT_ALLOC_BLOCK(inode) + 1)
|
| 342 |
|
|
{
|
| 343 |
|
|
UDF_I_NEXT_ALLOC_BLOCK(inode) ++;
|
| 344 |
|
|
UDF_I_NEXT_ALLOC_GOAL(inode) ++;
|
| 345 |
|
|
}
|
| 346 |
|
|
|
| 347 |
|
|
err = 0;
|
| 348 |
|
|
|
| 349 |
|
|
bh = inode_getblk(inode, block, &err, &phys, &new);
|
| 350 |
|
|
if (bh)
|
| 351 |
|
|
BUG();
|
| 352 |
|
|
if (err)
|
| 353 |
|
|
goto abort;
|
| 354 |
|
|
if (!phys)
|
| 355 |
|
|
BUG();
|
| 356 |
|
|
|
| 357 |
|
|
bh_result->b_dev = inode->i_dev;
|
| 358 |
|
|
bh_result->b_blocknr = phys;
|
| 359 |
|
|
bh_result->b_state |= (1UL << BH_Mapped);
|
| 360 |
|
|
if (new)
|
| 361 |
|
|
bh_result->b_state |= (1UL << BH_New);
|
| 362 |
|
|
abort:
|
| 363 |
|
|
unlock_kernel();
|
| 364 |
|
|
return err;
|
| 365 |
|
|
|
| 366 |
|
|
abort_negative:
|
| 367 |
|
|
udf_warning(inode->i_sb, "udf_get_block", "block < 0");
|
| 368 |
|
|
goto abort;
|
| 369 |
|
|
}
|
| 370 |
|
|
|
| 371 |
|
|
struct buffer_head * udf_getblk(struct inode * inode, long block,
|
| 372 |
|
|
int create, int * err)
|
| 373 |
|
|
{
|
| 374 |
|
|
struct buffer_head dummy;
|
| 375 |
|
|
|
| 376 |
|
|
dummy.b_state = 0;
|
| 377 |
|
|
dummy.b_blocknr = -1000;
|
| 378 |
|
|
*err = udf_get_block(inode, block, &dummy, create);
|
| 379 |
|
|
if (!*err && buffer_mapped(&dummy))
|
| 380 |
|
|
{
|
| 381 |
|
|
struct buffer_head *bh;
|
| 382 |
|
|
bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
|
| 383 |
|
|
if (buffer_new(&dummy))
|
| 384 |
|
|
{
|
| 385 |
|
|
lock_buffer(bh);
|
| 386 |
|
|
memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
|
| 387 |
|
|
mark_buffer_uptodate(bh, 1);
|
| 388 |
|
|
unlock_buffer(bh);
|
| 389 |
|
|
mark_buffer_dirty_inode(bh, inode);
|
| 390 |
|
|
}
|
| 391 |
|
|
return bh;
|
| 392 |
|
|
}
|
| 393 |
|
|
return NULL;
|
| 394 |
|
|
}
|
| 395 |
|
|
|
| 396 |
|
|
static struct buffer_head * inode_getblk(struct inode * inode, long block,
|
| 397 |
|
|
int *err, long *phys, int *new)
|
| 398 |
|
|
{
|
| 399 |
|
|
struct buffer_head *pbh = NULL, *cbh = NULL, *nbh = NULL, *result = NULL;
|
| 400 |
|
|
long_ad laarr[EXTENT_MERGE_SIZE];
|
| 401 |
|
|
uint32_t pextoffset = 0, cextoffset = 0, nextoffset = 0;
|
| 402 |
|
|
int count = 0, startnum = 0, endnum = 0;
|
| 403 |
|
|
uint32_t elen = 0;
|
| 404 |
|
|
lb_addr eloc, pbloc, cbloc, nbloc;
|
| 405 |
|
|
int c = 1;
|
| 406 |
|
|
uint64_t lbcount = 0, b_off = 0;
|
| 407 |
|
|
uint32_t newblocknum, newblock, offset = 0;
|
| 408 |
|
|
int8_t etype;
|
| 409 |
|
|
int goal = 0, pgoal = UDF_I_LOCATION(inode).logicalBlockNum;
|
| 410 |
|
|
char lastblock = 0;
|
| 411 |
|
|
|
| 412 |
|
|
pextoffset = cextoffset = nextoffset = udf_file_entry_alloc_offset(inode);
|
| 413 |
|
|
b_off = (uint64_t)block << inode->i_sb->s_blocksize_bits;
|
| 414 |
|
|
pbloc = cbloc = nbloc = UDF_I_LOCATION(inode);
|
| 415 |
|
|
|
| 416 |
|
|
/* find the extent which contains the block we are looking for.
|
| 417 |
|
|
alternate between laarr[0] and laarr[1] for locations of the
|
| 418 |
|
|
current extent, and the previous extent */
|
| 419 |
|
|
do
|
| 420 |
|
|
{
|
| 421 |
|
|
if (pbh != cbh)
|
| 422 |
|
|
{
|
| 423 |
|
|
udf_release_data(pbh);
|
| 424 |
|
|
atomic_inc(&cbh->b_count);
|
| 425 |
|
|
pbh = cbh;
|
| 426 |
|
|
}
|
| 427 |
|
|
if (cbh != nbh)
|
| 428 |
|
|
{
|
| 429 |
|
|
udf_release_data(cbh);
|
| 430 |
|
|
atomic_inc(&nbh->b_count);
|
| 431 |
|
|
cbh = nbh;
|
| 432 |
|
|
}
|
| 433 |
|
|
|
| 434 |
|
|
lbcount += elen;
|
| 435 |
|
|
|
| 436 |
|
|
pbloc = cbloc;
|
| 437 |
|
|
cbloc = nbloc;
|
| 438 |
|
|
|
| 439 |
|
|
pextoffset = cextoffset;
|
| 440 |
|
|
cextoffset = nextoffset;
|
| 441 |
|
|
|
| 442 |
|
|
if ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1)) == -1)
|
| 443 |
|
|
break;
|
| 444 |
|
|
|
| 445 |
|
|
c = !c;
|
| 446 |
|
|
|
| 447 |
|
|
laarr[c].extLength = (etype << 30) | elen;
|
| 448 |
|
|
laarr[c].extLocation = eloc;
|
| 449 |
|
|
|
| 450 |
|
|
if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
|
| 451 |
|
|
pgoal = eloc.logicalBlockNum +
|
| 452 |
|
|
((elen + inode->i_sb->s_blocksize - 1) >>
|
| 453 |
|
|
inode->i_sb->s_blocksize_bits);
|
| 454 |
|
|
|
| 455 |
|
|
count ++;
|
| 456 |
|
|
} while (lbcount + elen <= b_off);
|
| 457 |
|
|
|
| 458 |
|
|
b_off -= lbcount;
|
| 459 |
|
|
offset = b_off >> inode->i_sb->s_blocksize_bits;
|
| 460 |
|
|
|
| 461 |
|
|
/* if the extent is allocated and recorded, return the block
|
| 462 |
|
|
if the extent is not a multiple of the blocksize, round up */
|
| 463 |
|
|
|
| 464 |
|
|
if (etype == (EXT_RECORDED_ALLOCATED >> 30))
|
| 465 |
|
|
{
|
| 466 |
|
|
if (elen & (inode->i_sb->s_blocksize - 1))
|
| 467 |
|
|
{
|
| 468 |
|
|
elen = EXT_RECORDED_ALLOCATED |
|
| 469 |
|
|
((elen + inode->i_sb->s_blocksize - 1) &
|
| 470 |
|
|
~(inode->i_sb->s_blocksize - 1));
|
| 471 |
|
|
etype = udf_write_aext(inode, nbloc, &cextoffset, eloc, elen, nbh, 1);
|
| 472 |
|
|
}
|
| 473 |
|
|
udf_release_data(pbh);
|
| 474 |
|
|
udf_release_data(cbh);
|
| 475 |
|
|
udf_release_data(nbh);
|
| 476 |
|
|
newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset);
|
| 477 |
|
|
*phys = newblock;
|
| 478 |
|
|
return NULL;
|
| 479 |
|
|
}
|
| 480 |
|
|
|
| 481 |
|
|
if (etype == -1)
|
| 482 |
|
|
{
|
| 483 |
|
|
endnum = startnum = ((count > 1) ? 1 : count);
|
| 484 |
|
|
if (laarr[c].extLength & (inode->i_sb->s_blocksize - 1))
|
| 485 |
|
|
{
|
| 486 |
|
|
laarr[c].extLength =
|
| 487 |
|
|
(laarr[c].extLength & UDF_EXTENT_FLAG_MASK) |
|
| 488 |
|
|
(((laarr[c].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 489 |
|
|
inode->i_sb->s_blocksize - 1) &
|
| 490 |
|
|
~(inode->i_sb->s_blocksize - 1));
|
| 491 |
|
|
UDF_I_LENEXTENTS(inode) =
|
| 492 |
|
|
(UDF_I_LENEXTENTS(inode) + inode->i_sb->s_blocksize - 1) &
|
| 493 |
|
|
~(inode->i_sb->s_blocksize - 1);
|
| 494 |
|
|
}
|
| 495 |
|
|
c = !c;
|
| 496 |
|
|
laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
|
| 497 |
|
|
((offset + 1) << inode->i_sb->s_blocksize_bits);
|
| 498 |
|
|
memset(&laarr[c].extLocation, 0x00, sizeof(lb_addr));
|
| 499 |
|
|
count ++;
|
| 500 |
|
|
endnum ++;
|
| 501 |
|
|
lastblock = 1;
|
| 502 |
|
|
}
|
| 503 |
|
|
else
|
| 504 |
|
|
endnum = startnum = ((count > 2) ? 2 : count);
|
| 505 |
|
|
|
| 506 |
|
|
/* if the current extent is in position 0, swap it with the previous */
|
| 507 |
|
|
if (!c && count != 1)
|
| 508 |
|
|
{
|
| 509 |
|
|
laarr[2] = laarr[0];
|
| 510 |
|
|
laarr[0] = laarr[1];
|
| 511 |
|
|
laarr[1] = laarr[2];
|
| 512 |
|
|
c = 1;
|
| 513 |
|
|
}
|
| 514 |
|
|
|
| 515 |
|
|
/* if the current block is located in a extent, read the next extent */
|
| 516 |
|
|
if (etype != -1)
|
| 517 |
|
|
{
|
| 518 |
|
|
if ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 0)) != -1)
|
| 519 |
|
|
{
|
| 520 |
|
|
laarr[c+1].extLength = (etype << 30) | elen;
|
| 521 |
|
|
laarr[c+1].extLocation = eloc;
|
| 522 |
|
|
count ++;
|
| 523 |
|
|
startnum ++;
|
| 524 |
|
|
endnum ++;
|
| 525 |
|
|
}
|
| 526 |
|
|
else
|
| 527 |
|
|
lastblock = 1;
|
| 528 |
|
|
}
|
| 529 |
|
|
udf_release_data(nbh);
|
| 530 |
|
|
if (!pbh)
|
| 531 |
|
|
pbh = cbh;
|
| 532 |
|
|
else
|
| 533 |
|
|
udf_release_data(cbh);
|
| 534 |
|
|
|
| 535 |
|
|
/* if the current extent is not recorded but allocated, get the
|
| 536 |
|
|
block in the extent corresponding to the requested block */
|
| 537 |
|
|
if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
|
| 538 |
|
|
newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
|
| 539 |
|
|
else /* otherwise, allocate a new block */
|
| 540 |
|
|
{
|
| 541 |
|
|
if (UDF_I_NEXT_ALLOC_BLOCK(inode) == block)
|
| 542 |
|
|
goal = UDF_I_NEXT_ALLOC_GOAL(inode);
|
| 543 |
|
|
|
| 544 |
|
|
if (!goal)
|
| 545 |
|
|
{
|
| 546 |
|
|
if (!(goal = pgoal))
|
| 547 |
|
|
goal = UDF_I_LOCATION(inode).logicalBlockNum + 1;
|
| 548 |
|
|
}
|
| 549 |
|
|
|
| 550 |
|
|
if (!(newblocknum = udf_new_block(inode->i_sb, inode,
|
| 551 |
|
|
UDF_I_LOCATION(inode).partitionReferenceNum, goal, err)))
|
| 552 |
|
|
{
|
| 553 |
|
|
udf_release_data(pbh);
|
| 554 |
|
|
*err = -ENOSPC;
|
| 555 |
|
|
return NULL;
|
| 556 |
|
|
}
|
| 557 |
|
|
UDF_I_LENEXTENTS(inode) += inode->i_sb->s_blocksize;
|
| 558 |
|
|
}
|
| 559 |
|
|
|
| 560 |
|
|
/* if the extent the requsted block is located in contains multiple blocks,
|
| 561 |
|
|
split the extent into at most three extents. blocks prior to requested
|
| 562 |
|
|
block, requested block, and blocks after requested block */
|
| 563 |
|
|
udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
|
| 564 |
|
|
|
| 565 |
|
|
#ifdef UDF_PREALLOCATE
|
| 566 |
|
|
/* preallocate blocks */
|
| 567 |
|
|
udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
|
| 568 |
|
|
#endif
|
| 569 |
|
|
|
| 570 |
|
|
/* merge any continuous blocks in laarr */
|
| 571 |
|
|
udf_merge_extents(inode, laarr, &endnum);
|
| 572 |
|
|
|
| 573 |
|
|
/* write back the new extents, inserting new extents if the new number
|
| 574 |
|
|
of extents is greater than the old number, and deleting extents if
|
| 575 |
|
|
the new number of extents is less than the old number */
|
| 576 |
|
|
udf_update_extents(inode, laarr, startnum, endnum, pbloc, pextoffset, &pbh);
|
| 577 |
|
|
|
| 578 |
|
|
udf_release_data(pbh);
|
| 579 |
|
|
|
| 580 |
|
|
if (!(newblock = udf_get_pblock(inode->i_sb, newblocknum,
|
| 581 |
|
|
UDF_I_LOCATION(inode).partitionReferenceNum, 0)))
|
| 582 |
|
|
{
|
| 583 |
|
|
return NULL;
|
| 584 |
|
|
}
|
| 585 |
|
|
*phys = newblock;
|
| 586 |
|
|
*err = 0;
|
| 587 |
|
|
*new = 1;
|
| 588 |
|
|
UDF_I_NEXT_ALLOC_BLOCK(inode) = block;
|
| 589 |
|
|
UDF_I_NEXT_ALLOC_GOAL(inode) = newblocknum;
|
| 590 |
|
|
inode->i_ctime = CURRENT_TIME;
|
| 591 |
|
|
UDF_I_UCTIME(inode) = CURRENT_UTIME;
|
| 592 |
|
|
|
| 593 |
|
|
if (IS_SYNC(inode))
|
| 594 |
|
|
udf_sync_inode(inode);
|
| 595 |
|
|
else
|
| 596 |
|
|
mark_inode_dirty(inode);
|
| 597 |
|
|
return result;
|
| 598 |
|
|
}
|
| 599 |
|
|
|
| 600 |
|
|
static void udf_split_extents(struct inode *inode, int *c, int offset, int newblocknum,
|
| 601 |
|
|
long_ad laarr[EXTENT_MERGE_SIZE], int *endnum)
|
| 602 |
|
|
{
|
| 603 |
|
|
if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
|
| 604 |
|
|
(laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
|
| 605 |
|
|
{
|
| 606 |
|
|
int curr = *c;
|
| 607 |
|
|
int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 608 |
|
|
inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits;
|
| 609 |
|
|
int type = laarr[curr].extLength & ~UDF_EXTENT_LENGTH_MASK;
|
| 610 |
|
|
|
| 611 |
|
|
if (blen == 1)
|
| 612 |
|
|
;
|
| 613 |
|
|
else if (!offset || blen == offset + 1)
|
| 614 |
|
|
{
|
| 615 |
|
|
laarr[curr+2] = laarr[curr+1];
|
| 616 |
|
|
laarr[curr+1] = laarr[curr];
|
| 617 |
|
|
}
|
| 618 |
|
|
else
|
| 619 |
|
|
{
|
| 620 |
|
|
laarr[curr+3] = laarr[curr+1];
|
| 621 |
|
|
laarr[curr+2] = laarr[curr+1] = laarr[curr];
|
| 622 |
|
|
}
|
| 623 |
|
|
|
| 624 |
|
|
if (offset)
|
| 625 |
|
|
{
|
| 626 |
|
|
if ((type >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
|
| 627 |
|
|
{
|
| 628 |
|
|
udf_free_blocks(inode->i_sb, inode, laarr[curr].extLocation, 0, offset);
|
| 629 |
|
|
laarr[curr].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
|
| 630 |
|
|
(offset << inode->i_sb->s_blocksize_bits);
|
| 631 |
|
|
laarr[curr].extLocation.logicalBlockNum = 0;
|
| 632 |
|
|
laarr[curr].extLocation.partitionReferenceNum = 0;
|
| 633 |
|
|
}
|
| 634 |
|
|
else
|
| 635 |
|
|
laarr[curr].extLength = type |
|
| 636 |
|
|
(offset << inode->i_sb->s_blocksize_bits);
|
| 637 |
|
|
curr ++;
|
| 638 |
|
|
(*c) ++;
|
| 639 |
|
|
(*endnum) ++;
|
| 640 |
|
|
}
|
| 641 |
|
|
|
| 642 |
|
|
laarr[curr].extLocation.logicalBlockNum = newblocknum;
|
| 643 |
|
|
if ((type >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
|
| 644 |
|
|
laarr[curr].extLocation.partitionReferenceNum =
|
| 645 |
|
|
UDF_I_LOCATION(inode).partitionReferenceNum;
|
| 646 |
|
|
laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
|
| 647 |
|
|
inode->i_sb->s_blocksize;
|
| 648 |
|
|
curr ++;
|
| 649 |
|
|
|
| 650 |
|
|
if (blen != offset + 1)
|
| 651 |
|
|
{
|
| 652 |
|
|
if ((type >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
|
| 653 |
|
|
laarr[curr].extLocation.logicalBlockNum += (offset + 1);
|
| 654 |
|
|
laarr[curr].extLength = type |
|
| 655 |
|
|
((blen - (offset + 1)) << inode->i_sb->s_blocksize_bits);
|
| 656 |
|
|
curr ++;
|
| 657 |
|
|
(*endnum) ++;
|
| 658 |
|
|
}
|
| 659 |
|
|
}
|
| 660 |
|
|
}
|
| 661 |
|
|
|
| 662 |
|
|
static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
|
| 663 |
|
|
long_ad laarr[EXTENT_MERGE_SIZE], int *endnum)
|
| 664 |
|
|
{
|
| 665 |
|
|
int start, length = 0, currlength = 0, i;
|
| 666 |
|
|
|
| 667 |
|
|
if (*endnum >= (c+1))
|
| 668 |
|
|
{
|
| 669 |
|
|
if (!lastblock)
|
| 670 |
|
|
return;
|
| 671 |
|
|
else
|
| 672 |
|
|
start = c;
|
| 673 |
|
|
}
|
| 674 |
|
|
else
|
| 675 |
|
|
{
|
| 676 |
|
|
if ((laarr[c+1].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
|
| 677 |
|
|
{
|
| 678 |
|
|
start = c+1;
|
| 679 |
|
|
length = currlength = (((laarr[c+1].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 680 |
|
|
inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits);
|
| 681 |
|
|
}
|
| 682 |
|
|
else
|
| 683 |
|
|
start = c;
|
| 684 |
|
|
}
|
| 685 |
|
|
|
| 686 |
|
|
for (i=start+1; i<=*endnum; i++)
|
| 687 |
|
|
{
|
| 688 |
|
|
if (i == *endnum)
|
| 689 |
|
|
{
|
| 690 |
|
|
if (lastblock)
|
| 691 |
|
|
length += UDF_DEFAULT_PREALLOC_BLOCKS;
|
| 692 |
|
|
}
|
| 693 |
|
|
else if ((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
|
| 694 |
|
|
length += (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 695 |
|
|
inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits);
|
| 696 |
|
|
else
|
| 697 |
|
|
break;
|
| 698 |
|
|
}
|
| 699 |
|
|
|
| 700 |
|
|
if (length)
|
| 701 |
|
|
{
|
| 702 |
|
|
int next = laarr[start].extLocation.logicalBlockNum +
|
| 703 |
|
|
(((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 704 |
|
|
inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits);
|
| 705 |
|
|
int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
|
| 706 |
|
|
laarr[start].extLocation.partitionReferenceNum,
|
| 707 |
|
|
next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? length :
|
| 708 |
|
|
UDF_DEFAULT_PREALLOC_BLOCKS) - currlength);
|
| 709 |
|
|
|
| 710 |
|
|
if (numalloc)
|
| 711 |
|
|
{
|
| 712 |
|
|
if (start == (c+1))
|
| 713 |
|
|
laarr[start].extLength +=
|
| 714 |
|
|
(numalloc << inode->i_sb->s_blocksize_bits);
|
| 715 |
|
|
else
|
| 716 |
|
|
{
|
| 717 |
|
|
memmove(&laarr[c+2], &laarr[c+1],
|
| 718 |
|
|
sizeof(long_ad) * (*endnum - (c+1)));
|
| 719 |
|
|
(*endnum) ++;
|
| 720 |
|
|
laarr[c+1].extLocation.logicalBlockNum = next;
|
| 721 |
|
|
laarr[c+1].extLocation.partitionReferenceNum =
|
| 722 |
|
|
laarr[c].extLocation.partitionReferenceNum;
|
| 723 |
|
|
laarr[c+1].extLength = EXT_NOT_RECORDED_ALLOCATED |
|
| 724 |
|
|
(numalloc << inode->i_sb->s_blocksize_bits);
|
| 725 |
|
|
start = c+1;
|
| 726 |
|
|
}
|
| 727 |
|
|
|
| 728 |
|
|
for (i=start+1; numalloc && i<*endnum; i++)
|
| 729 |
|
|
{
|
| 730 |
|
|
int elen = ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 731 |
|
|
inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits;
|
| 732 |
|
|
|
| 733 |
|
|
if (elen > numalloc)
|
| 734 |
|
|
{
|
| 735 |
|
|
laarr[c].extLength -=
|
| 736 |
|
|
(numalloc << inode->i_sb->s_blocksize_bits);
|
| 737 |
|
|
numalloc = 0;
|
| 738 |
|
|
}
|
| 739 |
|
|
else
|
| 740 |
|
|
{
|
| 741 |
|
|
numalloc -= elen;
|
| 742 |
|
|
if (*endnum > (i+1))
|
| 743 |
|
|
memmove(&laarr[i], &laarr[i+1],
|
| 744 |
|
|
sizeof(long_ad) * (*endnum - (i+1)));
|
| 745 |
|
|
i --;
|
| 746 |
|
|
(*endnum) --;
|
| 747 |
|
|
}
|
| 748 |
|
|
}
|
| 749 |
|
|
UDF_I_LENEXTENTS(inode) += numalloc << inode->i_sb->s_blocksize_bits;
|
| 750 |
|
|
}
|
| 751 |
|
|
}
|
| 752 |
|
|
}
|
| 753 |
|
|
|
| 754 |
|
|
static void udf_merge_extents(struct inode *inode,
|
| 755 |
|
|
long_ad laarr[EXTENT_MERGE_SIZE], int *endnum)
|
| 756 |
|
|
{
|
| 757 |
|
|
int i;
|
| 758 |
|
|
|
| 759 |
|
|
for (i=0; i<(*endnum-1); i++)
|
| 760 |
|
|
{
|
| 761 |
|
|
if ((laarr[i].extLength >> 30) == (laarr[i+1].extLength >> 30))
|
| 762 |
|
|
{
|
| 763 |
|
|
if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
|
| 764 |
|
|
((laarr[i+1].extLocation.logicalBlockNum - laarr[i].extLocation.logicalBlockNum) ==
|
| 765 |
|
|
(((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 766 |
|
|
inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits)))
|
| 767 |
|
|
{
|
| 768 |
|
|
if (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 769 |
|
|
(laarr[i+1].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 770 |
|
|
inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK)
|
| 771 |
|
|
{
|
| 772 |
|
|
laarr[i+1].extLength = (laarr[i+1].extLength -
|
| 773 |
|
|
(laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 774 |
|
|
UDF_EXTENT_LENGTH_MASK) & ~(inode->i_sb->s_blocksize-1);
|
| 775 |
|
|
laarr[i].extLength = (UDF_EXTENT_LENGTH_MASK + 1) -
|
| 776 |
|
|
inode->i_sb->s_blocksize;
|
| 777 |
|
|
laarr[i+1].extLocation.logicalBlockNum =
|
| 778 |
|
|
laarr[i].extLocation.logicalBlockNum +
|
| 779 |
|
|
((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) >>
|
| 780 |
|
|
inode->i_sb->s_blocksize_bits);
|
| 781 |
|
|
}
|
| 782 |
|
|
else
|
| 783 |
|
|
{
|
| 784 |
|
|
laarr[i].extLength = laarr[i+1].extLength +
|
| 785 |
|
|
(((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) +
|
| 786 |
|
|
inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize-1));
|
| 787 |
|
|
if (*endnum > (i+2))
|
| 788 |
|
|
memmove(&laarr[i+1], &laarr[i+2],
|
| 789 |
|
|
sizeof(long_ad) * (*endnum - (i+2)));
|
| 790 |
|
|
i --;
|
| 791 |
|
|
(*endnum) --;
|
| 792 |
|
|
}
|
| 793 |
|
|
}
|
| 794 |
|
|
}
|
| 795 |
|
|
}
|
| 796 |
|
|
}
|
| 797 |
|
|
|
| 798 |
|
|
static void udf_update_extents(struct inode *inode,
|
| 799 |
|
|
long_ad laarr[EXTENT_MERGE_SIZE], int startnum, int endnum,
|
| 800 |
|
|
lb_addr pbloc, uint32_t pextoffset, struct buffer_head **pbh)
|
| 801 |
|
|
{
|
| 802 |
|
|
int start = 0, i;
|
| 803 |
|
|
lb_addr tmploc;
|
| 804 |
|
|
uint32_t tmplen;
|
| 805 |
|
|
|
| 806 |
|
|
if (startnum > endnum)
|
| 807 |
|
|
{
|
| 808 |
|
|
for (i=0; i<(startnum-endnum); i++)
|
| 809 |
|
|
{
|
| 810 |
|
|
udf_delete_aext(inode, pbloc, pextoffset, laarr[i].extLocation,
|
| 811 |
|
|
laarr[i].extLength, *pbh);
|
| 812 |
|
|
}
|
| 813 |
|
|
}
|
| 814 |
|
|
else if (startnum < endnum)
|
| 815 |
|
|
{
|
| 816 |
|
|
for (i=0; i<(endnum-startnum); i++)
|
| 817 |
|
|
{
|
| 818 |
|
|
udf_insert_aext(inode, pbloc, pextoffset, laarr[i].extLocation,
|
| 819 |
|
|
laarr[i].extLength, *pbh);
|
| 820 |
|
|
udf_next_aext(inode, &pbloc, &pextoffset, &laarr[i].extLocation,
|
| 821 |
|
|
&laarr[i].extLength, pbh, 1);
|
| 822 |
|
|
start ++;
|
| 823 |
|
|
}
|
| 824 |
|
|
}
|
| 825 |
|
|
|
| 826 |
|
|
for (i=start; i<endnum; i++)
|
| 827 |
|
|
{
|
| 828 |
|
|
udf_next_aext(inode, &pbloc, &pextoffset, &tmploc, &tmplen, pbh, 0);
|
| 829 |
|
|
udf_write_aext(inode, pbloc, &pextoffset, laarr[i].extLocation,
|
| 830 |
|
|
laarr[i].extLength, *pbh, 1);
|
| 831 |
|
|
}
|
| 832 |
|
|
}
|
| 833 |
|
|
|
| 834 |
|
|
struct buffer_head * udf_bread(struct inode * inode, int block,
|
| 835 |
|
|
int create, int * err)
|
| 836 |
|
|
{
|
| 837 |
|
|
struct buffer_head * bh = NULL;
|
| 838 |
|
|
|
| 839 |
|
|
bh = udf_getblk(inode, block, create, err);
|
| 840 |
|
|
if (!bh)
|
| 841 |
|
|
return NULL;
|
| 842 |
|
|
|
| 843 |
|
|
if (buffer_uptodate(bh))
|
| 844 |
|
|
return bh;
|
| 845 |
|
|
ll_rw_block(READ, 1, &bh);
|
| 846 |
|
|
wait_on_buffer(bh);
|
| 847 |
|
|
if (buffer_uptodate(bh))
|
| 848 |
|
|
return bh;
|
| 849 |
|
|
brelse(bh);
|
| 850 |
|
|
*err = -EIO;
|
| 851 |
|
|
return NULL;
|
| 852 |
|
|
}
|
| 853 |
|
|
|
| 854 |
|
|
void udf_truncate(struct inode * inode)
|
| 855 |
|
|
{
|
| 856 |
|
|
int offset;
|
| 857 |
|
|
struct buffer_head *bh;
|
| 858 |
|
|
int err;
|
| 859 |
|
|
|
| 860 |
|
|
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
|
| 861 |
|
|
S_ISLNK(inode->i_mode)))
|
| 862 |
|
|
return;
|
| 863 |
|
|
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
|
| 864 |
|
|
return;
|
| 865 |
|
|
|
| 866 |
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
|
| 867 |
|
|
{
|
| 868 |
|
|
if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) +
|
| 869 |
|
|
inode->i_size))
|
| 870 |
|
|
{
|
| 871 |
|
|
udf_expand_file_adinicb(inode, inode->i_size, &err);
|
| 872 |
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
|
| 873 |
|
|
{
|
| 874 |
|
|
inode->i_size = UDF_I_LENALLOC(inode);
|
| 875 |
|
|
return;
|
| 876 |
|
|
}
|
| 877 |
|
|
else
|
| 878 |
|
|
udf_truncate_extents(inode);
|
| 879 |
|
|
}
|
| 880 |
|
|
else
|
| 881 |
|
|
{
|
| 882 |
|
|
offset = (inode->i_size & (inode->i_sb->s_blocksize - 1)) +
|
| 883 |
|
|
udf_file_entry_alloc_offset(inode);
|
| 884 |
|
|
|
| 885 |
|
|
if ((bh = udf_tread(inode->i_sb,
|
| 886 |
|
|
udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0))))
|
| 887 |
|
|
{
|
| 888 |
|
|
memset(bh->b_data + offset, 0x00, inode->i_sb->s_blocksize - offset);
|
| 889 |
|
|
mark_buffer_dirty(bh);
|
| 890 |
|
|
udf_release_data(bh);
|
| 891 |
|
|
}
|
| 892 |
|
|
UDF_I_LENALLOC(inode) = inode->i_size;
|
| 893 |
|
|
}
|
| 894 |
|
|
}
|
| 895 |
|
|
else
|
| 896 |
|
|
{
|
| 897 |
|
|
block_truncate_page(inode->i_mapping, inode->i_size, udf_get_block);
|
| 898 |
|
|
udf_truncate_extents(inode);
|
| 899 |
|
|
}
|
| 900 |
|
|
|
| 901 |
|
|
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
| 902 |
|
|
UDF_I_UMTIME(inode) = UDF_I_UCTIME(inode) = CURRENT_UTIME;
|
| 903 |
|
|
if (IS_SYNC(inode))
|
| 904 |
|
|
udf_sync_inode (inode);
|
| 905 |
|
|
else
|
| 906 |
|
|
mark_inode_dirty(inode);
|
| 907 |
|
|
}
|
| 908 |
|
|
|
| 909 |
|
|
/*
|
| 910 |
|
|
* udf_read_inode
|
| 911 |
|
|
*
|
| 912 |
|
|
* PURPOSE
|
| 913 |
|
|
* Read an inode.
|
| 914 |
|
|
*
|
| 915 |
|
|
* DESCRIPTION
|
| 916 |
|
|
* This routine is called by iget() [which is called by udf_iget()]
|
| 917 |
|
|
* (clean_inode() will have been called first)
|
| 918 |
|
|
* when an inode is first read into memory.
|
| 919 |
|
|
*
|
| 920 |
|
|
* HISTORY
|
| 921 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
| 922 |
|
|
* Written, tested, and released.
|
| 923 |
|
|
*
|
| 924 |
|
|
* 12/19/98 dgb Updated to fix size problems.
|
| 925 |
|
|
*/
|
| 926 |
|
|
|
| 927 |
|
|
void
|
| 928 |
|
|
udf_read_inode(struct inode *inode)
|
| 929 |
|
|
{
|
| 930 |
|
|
memset(&UDF_I_LOCATION(inode), 0xFF, sizeof(lb_addr));
|
| 931 |
|
|
}
|
| 932 |
|
|
|
| 933 |
|
|
void
|
| 934 |
|
|
__udf_read_inode(struct inode *inode)
|
| 935 |
|
|
{
|
| 936 |
|
|
struct buffer_head *bh = NULL;
|
| 937 |
|
|
struct fileEntry *fe;
|
| 938 |
|
|
uint16_t ident;
|
| 939 |
|
|
|
| 940 |
|
|
/*
|
| 941 |
|
|
* Set defaults, but the inode is still incomplete!
|
| 942 |
|
|
* Note: get_new_inode() sets the following on a new inode:
|
| 943 |
|
|
* i_sb = sb
|
| 944 |
|
|
* i_dev = sb->s_dev;
|
| 945 |
|
|
* i_no = ino
|
| 946 |
|
|
* i_flags = sb->s_flags
|
| 947 |
|
|
* i_state = 0
|
| 948 |
|
|
* clean_inode(): zero fills and sets
|
| 949 |
|
|
* i_count = 1
|
| 950 |
|
|
* i_nlink = 1
|
| 951 |
|
|
* i_op = NULL;
|
| 952 |
|
|
*/
|
| 953 |
|
|
|
| 954 |
|
|
inode->i_blksize = PAGE_SIZE;
|
| 955 |
|
|
|
| 956 |
|
|
bh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 0, &ident);
|
| 957 |
|
|
|
| 958 |
|
|
if (!bh)
|
| 959 |
|
|
{
|
| 960 |
|
|
printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n",
|
| 961 |
|
|
inode->i_ino);
|
| 962 |
|
|
make_bad_inode(inode);
|
| 963 |
|
|
return;
|
| 964 |
|
|
}
|
| 965 |
|
|
|
| 966 |
|
|
if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
|
| 967 |
|
|
ident != TAG_IDENT_USE)
|
| 968 |
|
|
{
|
| 969 |
|
|
printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed ident=%d\n",
|
| 970 |
|
|
inode->i_ino, ident);
|
| 971 |
|
|
udf_release_data(bh);
|
| 972 |
|
|
make_bad_inode(inode);
|
| 973 |
|
|
return;
|
| 974 |
|
|
}
|
| 975 |
|
|
|
| 976 |
|
|
fe = (struct fileEntry *)bh->b_data;
|
| 977 |
|
|
|
| 978 |
|
|
if (le16_to_cpu(fe->icbTag.strategyType) == 4096)
|
| 979 |
|
|
{
|
| 980 |
|
|
struct buffer_head *ibh = NULL, *nbh = NULL;
|
| 981 |
|
|
struct indirectEntry *ie;
|
| 982 |
|
|
|
| 983 |
|
|
ibh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 1, &ident);
|
| 984 |
|
|
if (ident == TAG_IDENT_IE)
|
| 985 |
|
|
{
|
| 986 |
|
|
if (ibh)
|
| 987 |
|
|
{
|
| 988 |
|
|
lb_addr loc;
|
| 989 |
|
|
ie = (struct indirectEntry *)ibh->b_data;
|
| 990 |
|
|
|
| 991 |
|
|
loc = lelb_to_cpu(ie->indirectICB.extLocation);
|
| 992 |
|
|
|
| 993 |
|
|
if (ie->indirectICB.extLength &&
|
| 994 |
|
|
(nbh = udf_read_ptagged(inode->i_sb, loc, 0, &ident)))
|
| 995 |
|
|
{
|
| 996 |
|
|
if (ident == TAG_IDENT_FE ||
|
| 997 |
|
|
ident == TAG_IDENT_EFE)
|
| 998 |
|
|
{
|
| 999 |
|
|
memcpy(&UDF_I_LOCATION(inode), &loc, sizeof(lb_addr));
|
| 1000 |
|
|
udf_release_data(bh);
|
| 1001 |
|
|
udf_release_data(ibh);
|
| 1002 |
|
|
udf_release_data(nbh);
|
| 1003 |
|
|
__udf_read_inode(inode);
|
| 1004 |
|
|
return;
|
| 1005 |
|
|
}
|
| 1006 |
|
|
else
|
| 1007 |
|
|
{
|
| 1008 |
|
|
udf_release_data(nbh);
|
| 1009 |
|
|
udf_release_data(ibh);
|
| 1010 |
|
|
}
|
| 1011 |
|
|
}
|
| 1012 |
|
|
else
|
| 1013 |
|
|
udf_release_data(ibh);
|
| 1014 |
|
|
}
|
| 1015 |
|
|
}
|
| 1016 |
|
|
else
|
| 1017 |
|
|
udf_release_data(ibh);
|
| 1018 |
|
|
}
|
| 1019 |
|
|
else if (le16_to_cpu(fe->icbTag.strategyType) != 4)
|
| 1020 |
|
|
{
|
| 1021 |
|
|
printk(KERN_ERR "udf: unsupported strategy type: %d\n",
|
| 1022 |
|
|
le16_to_cpu(fe->icbTag.strategyType));
|
| 1023 |
|
|
udf_release_data(bh);
|
| 1024 |
|
|
make_bad_inode(inode);
|
| 1025 |
|
|
return;
|
| 1026 |
|
|
}
|
| 1027 |
|
|
udf_fill_inode(inode, bh);
|
| 1028 |
|
|
udf_release_data(bh);
|
| 1029 |
|
|
}
|
| 1030 |
|
|
|
| 1031 |
|
|
static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
|
| 1032 |
|
|
{
|
| 1033 |
|
|
struct fileEntry *fe;
|
| 1034 |
|
|
struct extendedFileEntry *efe;
|
| 1035 |
|
|
time_t convtime;
|
| 1036 |
|
|
long convtime_usec;
|
| 1037 |
|
|
int offset, alen;
|
| 1038 |
|
|
|
| 1039 |
|
|
inode->i_version = ++event;
|
| 1040 |
|
|
UDF_I_NEW_INODE(inode) = 0;
|
| 1041 |
|
|
|
| 1042 |
|
|
fe = (struct fileEntry *)bh->b_data;
|
| 1043 |
|
|
efe = (struct extendedFileEntry *)bh->b_data;
|
| 1044 |
|
|
|
| 1045 |
|
|
if (le16_to_cpu(fe->icbTag.strategyType) == 4)
|
| 1046 |
|
|
UDF_I_STRAT4096(inode) = 0;
|
| 1047 |
|
|
else /* if (le16_to_cpu(fe->icbTag.strategyType) == 4096) */
|
| 1048 |
|
|
UDF_I_STRAT4096(inode) = 1;
|
| 1049 |
|
|
|
| 1050 |
|
|
UDF_I_ALLOCTYPE(inode) = le16_to_cpu(fe->icbTag.flags) & ICBTAG_FLAG_AD_MASK;
|
| 1051 |
|
|
if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_EFE)
|
| 1052 |
|
|
UDF_I_EXTENDED_FE(inode) = 1;
|
| 1053 |
|
|
else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_FE)
|
| 1054 |
|
|
UDF_I_EXTENDED_FE(inode) = 0;
|
| 1055 |
|
|
else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE)
|
| 1056 |
|
|
{
|
| 1057 |
|
|
UDF_I_LENALLOC(inode) =
|
| 1058 |
|
|
le32_to_cpu(
|
| 1059 |
|
|
((struct unallocSpaceEntry *)bh->b_data)->lengthAllocDescs);
|
| 1060 |
|
|
return;
|
| 1061 |
|
|
}
|
| 1062 |
|
|
|
| 1063 |
|
|
inode->i_uid = le32_to_cpu(fe->uid);
|
| 1064 |
|
|
if ( inode->i_uid == -1 ) inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
|
| 1065 |
|
|
|
| 1066 |
|
|
inode->i_gid = le32_to_cpu(fe->gid);
|
| 1067 |
|
|
if ( inode->i_gid == -1 ) inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
|
| 1068 |
|
|
|
| 1069 |
|
|
inode->i_nlink = le16_to_cpu(fe->fileLinkCount);
|
| 1070 |
|
|
if (!inode->i_nlink)
|
| 1071 |
|
|
inode->i_nlink = 1;
|
| 1072 |
|
|
|
| 1073 |
|
|
inode->i_size = le64_to_cpu(fe->informationLength);
|
| 1074 |
|
|
UDF_I_LENEXTENTS(inode) = inode->i_size;
|
| 1075 |
|
|
|
| 1076 |
|
|
inode->i_mode = udf_convert_permissions(fe);
|
| 1077 |
|
|
inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask;
|
| 1078 |
|
|
|
| 1079 |
|
|
UDF_I_NEXT_ALLOC_BLOCK(inode) = 0;
|
| 1080 |
|
|
UDF_I_NEXT_ALLOC_GOAL(inode) = 0;
|
| 1081 |
|
|
|
| 1082 |
|
|
if (UDF_I_EXTENDED_FE(inode) == 0)
|
| 1083 |
|
|
{
|
| 1084 |
|
|
inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
|
| 1085 |
|
|
(inode->i_sb->s_blocksize_bits - 9);
|
| 1086 |
|
|
|
| 1087 |
|
|
if ( udf_stamp_to_time(&convtime, &convtime_usec,
|
| 1088 |
|
|
lets_to_cpu(fe->accessTime)) )
|
| 1089 |
|
|
{
|
| 1090 |
|
|
inode->i_atime = convtime;
|
| 1091 |
|
|
}
|
| 1092 |
|
|
else
|
| 1093 |
|
|
{
|
| 1094 |
|
|
inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb);
|
| 1095 |
|
|
}
|
| 1096 |
|
|
|
| 1097 |
|
|
if ( udf_stamp_to_time(&convtime, &convtime_usec,
|
| 1098 |
|
|
lets_to_cpu(fe->modificationTime)) )
|
| 1099 |
|
|
{
|
| 1100 |
|
|
inode->i_mtime = convtime;
|
| 1101 |
|
|
UDF_I_UMTIME(inode) = convtime_usec;
|
| 1102 |
|
|
}
|
| 1103 |
|
|
else
|
| 1104 |
|
|
{
|
| 1105 |
|
|
inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb);
|
| 1106 |
|
|
UDF_I_UMTIME(inode) = 0;
|
| 1107 |
|
|
}
|
| 1108 |
|
|
|
| 1109 |
|
|
if ( udf_stamp_to_time(&convtime, &convtime_usec,
|
| 1110 |
|
|
lets_to_cpu(fe->attrTime)) )
|
| 1111 |
|
|
{
|
| 1112 |
|
|
inode->i_ctime = convtime;
|
| 1113 |
|
|
UDF_I_UCTIME(inode) = convtime_usec;
|
| 1114 |
|
|
}
|
| 1115 |
|
|
else
|
| 1116 |
|
|
{
|
| 1117 |
|
|
inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb);
|
| 1118 |
|
|
UDF_I_UCTIME(inode) = 0;
|
| 1119 |
|
|
}
|
| 1120 |
|
|
|
| 1121 |
|
|
UDF_I_UNIQUE(inode) = le64_to_cpu(fe->uniqueID);
|
| 1122 |
|
|
UDF_I_LENEATTR(inode) = le32_to_cpu(fe->lengthExtendedAttr);
|
| 1123 |
|
|
UDF_I_LENALLOC(inode) = le32_to_cpu(fe->lengthAllocDescs);
|
| 1124 |
|
|
offset = sizeof(struct fileEntry) + UDF_I_LENEATTR(inode);
|
| 1125 |
|
|
alen = offset + UDF_I_LENALLOC(inode);
|
| 1126 |
|
|
}
|
| 1127 |
|
|
else
|
| 1128 |
|
|
{
|
| 1129 |
|
|
inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
|
| 1130 |
|
|
(inode->i_sb->s_blocksize_bits - 9);
|
| 1131 |
|
|
|
| 1132 |
|
|
if ( udf_stamp_to_time(&convtime, &convtime_usec,
|
| 1133 |
|
|
lets_to_cpu(efe->accessTime)) )
|
| 1134 |
|
|
{
|
| 1135 |
|
|
inode->i_atime = convtime;
|
| 1136 |
|
|
}
|
| 1137 |
|
|
else
|
| 1138 |
|
|
{
|
| 1139 |
|
|
inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb);
|
| 1140 |
|
|
}
|
| 1141 |
|
|
|
| 1142 |
|
|
if ( udf_stamp_to_time(&convtime, &convtime_usec,
|
| 1143 |
|
|
lets_to_cpu(efe->modificationTime)) )
|
| 1144 |
|
|
{
|
| 1145 |
|
|
inode->i_mtime = convtime;
|
| 1146 |
|
|
UDF_I_UMTIME(inode) = convtime_usec;
|
| 1147 |
|
|
}
|
| 1148 |
|
|
else
|
| 1149 |
|
|
{
|
| 1150 |
|
|
inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb);
|
| 1151 |
|
|
UDF_I_UMTIME(inode) = 0;
|
| 1152 |
|
|
}
|
| 1153 |
|
|
|
| 1154 |
|
|
if ( udf_stamp_to_time(&convtime, &convtime_usec,
|
| 1155 |
|
|
lets_to_cpu(efe->createTime)) )
|
| 1156 |
|
|
{
|
| 1157 |
|
|
UDF_I_CRTIME(inode) = convtime;
|
| 1158 |
|
|
UDF_I_UCRTIME(inode) = convtime_usec;
|
| 1159 |
|
|
}
|
| 1160 |
|
|
else
|
| 1161 |
|
|
{
|
| 1162 |
|
|
UDF_I_CRTIME(inode) = UDF_SB_RECORDTIME(inode->i_sb);
|
| 1163 |
|
|
UDF_I_UCRTIME(inode) = 0;
|
| 1164 |
|
|
}
|
| 1165 |
|
|
|
| 1166 |
|
|
if ( udf_stamp_to_time(&convtime, &convtime_usec,
|
| 1167 |
|
|
lets_to_cpu(efe->attrTime)) )
|
| 1168 |
|
|
{
|
| 1169 |
|
|
inode->i_ctime = convtime;
|
| 1170 |
|
|
UDF_I_UCTIME(inode) = convtime_usec;
|
| 1171 |
|
|
}
|
| 1172 |
|
|
else
|
| 1173 |
|
|
{
|
| 1174 |
|
|
inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb);
|
| 1175 |
|
|
UDF_I_UCTIME(inode) = 0;
|
| 1176 |
|
|
}
|
| 1177 |
|
|
|
| 1178 |
|
|
UDF_I_UNIQUE(inode) = le64_to_cpu(efe->uniqueID);
|
| 1179 |
|
|
UDF_I_LENEATTR(inode) = le32_to_cpu(efe->lengthExtendedAttr);
|
| 1180 |
|
|
UDF_I_LENALLOC(inode) = le32_to_cpu(efe->lengthAllocDescs);
|
| 1181 |
|
|
offset = sizeof(struct extendedFileEntry) + UDF_I_LENEATTR(inode);
|
| 1182 |
|
|
alen = offset + UDF_I_LENALLOC(inode);
|
| 1183 |
|
|
}
|
| 1184 |
|
|
|
| 1185 |
|
|
switch (fe->icbTag.fileType)
|
| 1186 |
|
|
{
|
| 1187 |
|
|
case ICBTAG_FILE_TYPE_DIRECTORY:
|
| 1188 |
|
|
{
|
| 1189 |
|
|
inode->i_op = &udf_dir_inode_operations;
|
| 1190 |
|
|
inode->i_fop = &udf_dir_operations;
|
| 1191 |
|
|
inode->i_mode |= S_IFDIR;
|
| 1192 |
|
|
inode->i_nlink ++;
|
| 1193 |
|
|
break;
|
| 1194 |
|
|
}
|
| 1195 |
|
|
case ICBTAG_FILE_TYPE_REALTIME:
|
| 1196 |
|
|
case ICBTAG_FILE_TYPE_REGULAR:
|
| 1197 |
|
|
case ICBTAG_FILE_TYPE_UNDEF:
|
| 1198 |
|
|
{
|
| 1199 |
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
|
| 1200 |
|
|
inode->i_data.a_ops = &udf_adinicb_aops;
|
| 1201 |
|
|
else
|
| 1202 |
|
|
inode->i_data.a_ops = &udf_aops;
|
| 1203 |
|
|
inode->i_op = &udf_file_inode_operations;
|
| 1204 |
|
|
inode->i_fop = &udf_file_operations;
|
| 1205 |
|
|
inode->i_mode |= S_IFREG;
|
| 1206 |
|
|
break;
|
| 1207 |
|
|
}
|
| 1208 |
|
|
case ICBTAG_FILE_TYPE_BLOCK:
|
| 1209 |
|
|
{
|
| 1210 |
|
|
inode->i_mode |= S_IFBLK;
|
| 1211 |
|
|
break;
|
| 1212 |
|
|
}
|
| 1213 |
|
|
case ICBTAG_FILE_TYPE_CHAR:
|
| 1214 |
|
|
{
|
| 1215 |
|
|
inode->i_mode |= S_IFCHR;
|
| 1216 |
|
|
break;
|
| 1217 |
|
|
}
|
| 1218 |
|
|
case ICBTAG_FILE_TYPE_FIFO:
|
| 1219 |
|
|
{
|
| 1220 |
|
|
init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
|
| 1221 |
|
|
break;
|
| 1222 |
|
|
}
|
| 1223 |
|
|
case ICBTAG_FILE_TYPE_SYMLINK:
|
| 1224 |
|
|
{
|
| 1225 |
|
|
inode->i_data.a_ops = &udf_symlink_aops;
|
| 1226 |
|
|
inode->i_op = &page_symlink_inode_operations;
|
| 1227 |
|
|
inode->i_mode = S_IFLNK|S_IRWXUGO;
|
| 1228 |
|
|
break;
|
| 1229 |
|
|
}
|
| 1230 |
|
|
default:
|
| 1231 |
|
|
{
|
| 1232 |
|
|
printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown file type=%d\n",
|
| 1233 |
|
|
inode->i_ino, fe->icbTag.fileType);
|
| 1234 |
|
|
make_bad_inode(inode);
|
| 1235 |
|
|
return;
|
| 1236 |
|
|
}
|
| 1237 |
|
|
}
|
| 1238 |
|
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
|
| 1239 |
|
|
{
|
| 1240 |
|
|
struct buffer_head *tbh = NULL;
|
| 1241 |
|
|
struct deviceSpec *dsea =
|
| 1242 |
|
|
(struct deviceSpec *)
|
| 1243 |
|
|
udf_get_extendedattr(inode, 12, 1, &tbh);
|
| 1244 |
|
|
|
| 1245 |
|
|
if (dsea)
|
| 1246 |
|
|
{
|
| 1247 |
|
|
init_special_inode(inode, inode->i_mode,
|
| 1248 |
|
|
((le32_to_cpu(dsea->majorDeviceIdent)) << 8) |
|
| 1249 |
|
|
(le32_to_cpu(dsea->minorDeviceIdent) & 0xFF));
|
| 1250 |
|
|
/* Developer ID ??? */
|
| 1251 |
|
|
udf_release_data(tbh);
|
| 1252 |
|
|
}
|
| 1253 |
|
|
else
|
| 1254 |
|
|
{
|
| 1255 |
|
|
make_bad_inode(inode);
|
| 1256 |
|
|
}
|
| 1257 |
|
|
}
|
| 1258 |
|
|
}
|
| 1259 |
|
|
|
| 1260 |
|
|
static mode_t
|
| 1261 |
|
|
udf_convert_permissions(struct fileEntry *fe)
|
| 1262 |
|
|
{
|
| 1263 |
|
|
mode_t mode;
|
| 1264 |
|
|
uint32_t permissions;
|
| 1265 |
|
|
uint32_t flags;
|
| 1266 |
|
|
|
| 1267 |
|
|
permissions = le32_to_cpu(fe->permissions);
|
| 1268 |
|
|
flags = le16_to_cpu(fe->icbTag.flags);
|
| 1269 |
|
|
|
| 1270 |
|
|
mode = (( permissions ) & S_IRWXO) |
|
| 1271 |
|
|
(( permissions >> 2 ) & S_IRWXG) |
|
| 1272 |
|
|
(( permissions >> 4 ) & S_IRWXU) |
|
| 1273 |
|
|
(( flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
|
| 1274 |
|
|
(( flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
|
| 1275 |
|
|
(( flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
|
| 1276 |
|
|
|
| 1277 |
|
|
return mode;
|
| 1278 |
|
|
}
|
| 1279 |
|
|
|
| 1280 |
|
|
/*
|
| 1281 |
|
|
* udf_write_inode
|
| 1282 |
|
|
*
|
| 1283 |
|
|
* PURPOSE
|
| 1284 |
|
|
* Write out the specified inode.
|
| 1285 |
|
|
*
|
| 1286 |
|
|
* DESCRIPTION
|
| 1287 |
|
|
* This routine is called whenever an inode is synced.
|
| 1288 |
|
|
* Currently this routine is just a placeholder.
|
| 1289 |
|
|
*
|
| 1290 |
|
|
* HISTORY
|
| 1291 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
| 1292 |
|
|
* Written, tested, and released.
|
| 1293 |
|
|
*/
|
| 1294 |
|
|
|
| 1295 |
|
|
void udf_write_inode(struct inode * inode, int sync)
|
| 1296 |
|
|
{
|
| 1297 |
|
|
lock_kernel();
|
| 1298 |
|
|
udf_update_inode(inode, sync);
|
| 1299 |
|
|
unlock_kernel();
|
| 1300 |
|
|
}
|
| 1301 |
|
|
|
| 1302 |
|
|
int udf_sync_inode(struct inode * inode)
|
| 1303 |
|
|
{
|
| 1304 |
|
|
return udf_update_inode(inode, 1);
|
| 1305 |
|
|
}
|
| 1306 |
|
|
|
| 1307 |
|
|
static int
|
| 1308 |
|
|
udf_update_inode(struct inode *inode, int do_sync)
|
| 1309 |
|
|
{
|
| 1310 |
|
|
struct buffer_head *bh = NULL;
|
| 1311 |
|
|
struct fileEntry *fe;
|
| 1312 |
|
|
struct extendedFileEntry *efe;
|
| 1313 |
|
|
uint32_t udfperms;
|
| 1314 |
|
|
uint16_t icbflags;
|
| 1315 |
|
|
uint16_t crclen;
|
| 1316 |
|
|
int i;
|
| 1317 |
|
|
timestamp cpu_time;
|
| 1318 |
|
|
int err = 0;
|
| 1319 |
|
|
|
| 1320 |
|
|
bh = udf_tread(inode->i_sb,
|
| 1321 |
|
|
udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0));
|
| 1322 |
|
|
|
| 1323 |
|
|
if (!bh)
|
| 1324 |
|
|
{
|
| 1325 |
|
|
udf_debug("bread failure\n");
|
| 1326 |
|
|
return -EIO;
|
| 1327 |
|
|
}
|
| 1328 |
|
|
fe = (struct fileEntry *)bh->b_data;
|
| 1329 |
|
|
efe = (struct extendedFileEntry *)bh->b_data;
|
| 1330 |
|
|
if (UDF_I_NEW_INODE(inode) == 1)
|
| 1331 |
|
|
{
|
| 1332 |
|
|
if (UDF_I_EXTENDED_FE(inode) == 0)
|
| 1333 |
|
|
memset(bh->b_data, 0x00, sizeof(struct fileEntry));
|
| 1334 |
|
|
else
|
| 1335 |
|
|
memset(bh->b_data, 0x00, sizeof(struct extendedFileEntry));
|
| 1336 |
|
|
memset(bh->b_data + udf_file_entry_alloc_offset(inode) +
|
| 1337 |
|
|
UDF_I_LENALLOC(inode), 0x0, inode->i_sb->s_blocksize -
|
| 1338 |
|
|
udf_file_entry_alloc_offset(inode) - UDF_I_LENALLOC(inode));
|
| 1339 |
|
|
UDF_I_NEW_INODE(inode) = 0;
|
| 1340 |
|
|
}
|
| 1341 |
|
|
|
| 1342 |
|
|
if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE)
|
| 1343 |
|
|
{
|
| 1344 |
|
|
struct unallocSpaceEntry *use =
|
| 1345 |
|
|
(struct unallocSpaceEntry *)bh->b_data;
|
| 1346 |
|
|
|
| 1347 |
|
|
use->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode));
|
| 1348 |
|
|
crclen = sizeof(struct unallocSpaceEntry) + UDF_I_LENALLOC(inode) -
|
| 1349 |
|
|
sizeof(tag);
|
| 1350 |
|
|
use->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum);
|
| 1351 |
|
|
use->descTag.descCRCLength = cpu_to_le16(crclen);
|
| 1352 |
|
|
use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + sizeof(tag), crclen, 0));
|
| 1353 |
|
|
|
| 1354 |
|
|
use->descTag.tagChecksum = 0;
|
| 1355 |
|
|
for (i=0; i<16; i++)
|
| 1356 |
|
|
if (i != 4)
|
| 1357 |
|
|
use->descTag.tagChecksum += ((uint8_t *)&(use->descTag))[i];
|
| 1358 |
|
|
|
| 1359 |
|
|
mark_buffer_dirty(bh);
|
| 1360 |
|
|
udf_release_data(bh);
|
| 1361 |
|
|
return err;
|
| 1362 |
|
|
}
|
| 1363 |
|
|
|
| 1364 |
|
|
if (inode->i_uid != UDF_SB(inode->i_sb)->s_uid)
|
| 1365 |
|
|
fe->uid = cpu_to_le32(inode->i_uid);
|
| 1366 |
|
|
|
| 1367 |
|
|
if (inode->i_gid != UDF_SB(inode->i_sb)->s_gid)
|
| 1368 |
|
|
fe->gid = cpu_to_le32(inode->i_gid);
|
| 1369 |
|
|
|
| 1370 |
|
|
udfperms = ((inode->i_mode & S_IRWXO) ) |
|
| 1371 |
|
|
((inode->i_mode & S_IRWXG) << 2) |
|
| 1372 |
|
|
((inode->i_mode & S_IRWXU) << 4);
|
| 1373 |
|
|
|
| 1374 |
|
|
udfperms |= (le32_to_cpu(fe->permissions) &
|
| 1375 |
|
|
(FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
|
| 1376 |
|
|
FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
|
| 1377 |
|
|
FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
|
| 1378 |
|
|
fe->permissions = cpu_to_le32(udfperms);
|
| 1379 |
|
|
|
| 1380 |
|
|
if (S_ISDIR(inode->i_mode))
|
| 1381 |
|
|
fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
|
| 1382 |
|
|
else
|
| 1383 |
|
|
fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
|
| 1384 |
|
|
|
| 1385 |
|
|
fe->informationLength = cpu_to_le64(inode->i_size);
|
| 1386 |
|
|
|
| 1387 |
|
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
|
| 1388 |
|
|
{
|
| 1389 |
|
|
regid *eid;
|
| 1390 |
|
|
struct buffer_head *tbh = NULL;
|
| 1391 |
|
|
struct deviceSpec *dsea =
|
| 1392 |
|
|
(struct deviceSpec *)
|
| 1393 |
|
|
udf_get_extendedattr(inode, 12, 1, &tbh);
|
| 1394 |
|
|
|
| 1395 |
|
|
if (!dsea)
|
| 1396 |
|
|
{
|
| 1397 |
|
|
dsea = (struct deviceSpec *)
|
| 1398 |
|
|
udf_add_extendedattr(inode,
|
| 1399 |
|
|
sizeof(struct deviceSpec) +
|
| 1400 |
|
|
sizeof(regid), 12, 0x3, &tbh);
|
| 1401 |
|
|
dsea->attrType = 12;
|
| 1402 |
|
|
dsea->attrSubtype = 1;
|
| 1403 |
|
|
dsea->attrLength = sizeof(struct deviceSpec) +
|
| 1404 |
|
|
sizeof(regid);
|
| 1405 |
|
|
dsea->impUseLength = sizeof(regid);
|
| 1406 |
|
|
}
|
| 1407 |
|
|
eid = (regid *)dsea->impUse;
|
| 1408 |
|
|
memset(eid, 0, sizeof(regid));
|
| 1409 |
|
|
strcpy(eid->ident, UDF_ID_DEVELOPER);
|
| 1410 |
|
|
eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
|
| 1411 |
|
|
eid->identSuffix[1] = UDF_OS_ID_LINUX;
|
| 1412 |
|
|
dsea->majorDeviceIdent = kdev_t_to_nr(inode->i_rdev) >> 8;
|
| 1413 |
|
|
dsea->minorDeviceIdent = kdev_t_to_nr(inode->i_rdev) & 0xFF;
|
| 1414 |
|
|
mark_buffer_dirty_inode(tbh, inode);
|
| 1415 |
|
|
udf_release_data(tbh);
|
| 1416 |
|
|
}
|
| 1417 |
|
|
|
| 1418 |
|
|
if (UDF_I_EXTENDED_FE(inode) == 0)
|
| 1419 |
|
|
{
|
| 1420 |
|
|
fe->logicalBlocksRecorded = cpu_to_le64(
|
| 1421 |
|
|
(inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >>
|
| 1422 |
|
|
(inode->i_sb->s_blocksize_bits - 9));
|
| 1423 |
|
|
|
| 1424 |
|
|
if (udf_time_to_stamp(&cpu_time, inode->i_atime, 0))
|
| 1425 |
|
|
fe->accessTime = cpu_to_lets(cpu_time);
|
| 1426 |
|
|
if (udf_time_to_stamp(&cpu_time, inode->i_mtime, UDF_I_UMTIME(inode)))
|
| 1427 |
|
|
fe->modificationTime = cpu_to_lets(cpu_time);
|
| 1428 |
|
|
if (udf_time_to_stamp(&cpu_time, inode->i_ctime, UDF_I_UCTIME(inode)))
|
| 1429 |
|
|
fe->attrTime = cpu_to_lets(cpu_time);
|
| 1430 |
|
|
memset(&(fe->impIdent), 0, sizeof(regid));
|
| 1431 |
|
|
strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
|
| 1432 |
|
|
fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
|
| 1433 |
|
|
fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
|
| 1434 |
|
|
fe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode));
|
| 1435 |
|
|
fe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode));
|
| 1436 |
|
|
fe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode));
|
| 1437 |
|
|
fe->descTag.tagIdent = le16_to_cpu(TAG_IDENT_FE);
|
| 1438 |
|
|
crclen = sizeof(struct fileEntry);
|
| 1439 |
|
|
}
|
| 1440 |
|
|
else
|
| 1441 |
|
|
{
|
| 1442 |
|
|
efe->objectSize = cpu_to_le64(inode->i_size);
|
| 1443 |
|
|
efe->logicalBlocksRecorded = cpu_to_le64(
|
| 1444 |
|
|
(inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >>
|
| 1445 |
|
|
(inode->i_sb->s_blocksize_bits - 9));
|
| 1446 |
|
|
|
| 1447 |
|
|
if (UDF_I_CRTIME(inode) >= inode->i_atime)
|
| 1448 |
|
|
{
|
| 1449 |
|
|
UDF_I_CRTIME(inode) = inode->i_atime;
|
| 1450 |
|
|
UDF_I_UCRTIME(inode) = 0;
|
| 1451 |
|
|
}
|
| 1452 |
|
|
if (UDF_I_CRTIME(inode) > inode->i_mtime ||
|
| 1453 |
|
|
(UDF_I_CRTIME(inode) == inode->i_mtime &&
|
| 1454 |
|
|
UDF_I_UCRTIME(inode) > UDF_I_UMTIME(inode)))
|
| 1455 |
|
|
{
|
| 1456 |
|
|
UDF_I_CRTIME(inode) = inode->i_mtime;
|
| 1457 |
|
|
UDF_I_UCRTIME(inode) = UDF_I_UMTIME(inode);
|
| 1458 |
|
|
}
|
| 1459 |
|
|
if (UDF_I_CRTIME(inode) > inode->i_ctime ||
|
| 1460 |
|
|
(UDF_I_CRTIME(inode) == inode->i_ctime &&
|
| 1461 |
|
|
UDF_I_UCRTIME(inode) > UDF_I_UCTIME(inode)))
|
| 1462 |
|
|
{
|
| 1463 |
|
|
UDF_I_CRTIME(inode) = inode->i_ctime;
|
| 1464 |
|
|
UDF_I_UCRTIME(inode) = UDF_I_UCTIME(inode);
|
| 1465 |
|
|
}
|
| 1466 |
|
|
|
| 1467 |
|
|
if (udf_time_to_stamp(&cpu_time, inode->i_atime, 0))
|
| 1468 |
|
|
efe->accessTime = cpu_to_lets(cpu_time);
|
| 1469 |
|
|
if (udf_time_to_stamp(&cpu_time, inode->i_mtime, UDF_I_UMTIME(inode)))
|
| 1470 |
|
|
efe->modificationTime = cpu_to_lets(cpu_time);
|
| 1471 |
|
|
if (udf_time_to_stamp(&cpu_time, UDF_I_CRTIME(inode), UDF_I_UCRTIME(inode)))
|
| 1472 |
|
|
efe->createTime = cpu_to_lets(cpu_time);
|
| 1473 |
|
|
if (udf_time_to_stamp(&cpu_time, inode->i_ctime, UDF_I_UCTIME(inode)))
|
| 1474 |
|
|
efe->attrTime = cpu_to_lets(cpu_time);
|
| 1475 |
|
|
|
| 1476 |
|
|
memset(&(efe->impIdent), 0, sizeof(regid));
|
| 1477 |
|
|
strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
|
| 1478 |
|
|
efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
|
| 1479 |
|
|
efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
|
| 1480 |
|
|
efe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode));
|
| 1481 |
|
|
efe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode));
|
| 1482 |
|
|
efe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode));
|
| 1483 |
|
|
efe->descTag.tagIdent = le16_to_cpu(TAG_IDENT_EFE);
|
| 1484 |
|
|
crclen = sizeof(struct extendedFileEntry);
|
| 1485 |
|
|
}
|
| 1486 |
|
|
if (UDF_I_STRAT4096(inode))
|
| 1487 |
|
|
{
|
| 1488 |
|
|
fe->icbTag.strategyType = cpu_to_le16(4096);
|
| 1489 |
|
|
fe->icbTag.strategyParameter = cpu_to_le16(1);
|
| 1490 |
|
|
fe->icbTag.numEntries = cpu_to_le16(2);
|
| 1491 |
|
|
}
|
| 1492 |
|
|
else
|
| 1493 |
|
|
{
|
| 1494 |
|
|
fe->icbTag.strategyType = cpu_to_le16(4);
|
| 1495 |
|
|
fe->icbTag.numEntries = cpu_to_le16(1);
|
| 1496 |
|
|
}
|
| 1497 |
|
|
|
| 1498 |
|
|
if (S_ISDIR(inode->i_mode))
|
| 1499 |
|
|
fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
|
| 1500 |
|
|
else if (S_ISREG(inode->i_mode))
|
| 1501 |
|
|
fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
|
| 1502 |
|
|
else if (S_ISLNK(inode->i_mode))
|
| 1503 |
|
|
fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
|
| 1504 |
|
|
else if (S_ISBLK(inode->i_mode))
|
| 1505 |
|
|
fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
|
| 1506 |
|
|
else if (S_ISCHR(inode->i_mode))
|
| 1507 |
|
|
fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
|
| 1508 |
|
|
else if (S_ISFIFO(inode->i_mode))
|
| 1509 |
|
|
fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
|
| 1510 |
|
|
|
| 1511 |
|
|
icbflags = UDF_I_ALLOCTYPE(inode) |
|
| 1512 |
|
|
((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
|
| 1513 |
|
|
((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
|
| 1514 |
|
|
((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
|
| 1515 |
|
|
(le16_to_cpu(fe->icbTag.flags) &
|
| 1516 |
|
|
~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
|
| 1517 |
|
|
ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
|
| 1518 |
|
|
|
| 1519 |
|
|
fe->icbTag.flags = cpu_to_le16(icbflags);
|
| 1520 |
|
|
if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200)
|
| 1521 |
|
|
fe->descTag.descVersion = cpu_to_le16(3);
|
| 1522 |
|
|
else
|
| 1523 |
|
|
fe->descTag.descVersion = cpu_to_le16(2);
|
| 1524 |
|
|
fe->descTag.tagSerialNum = cpu_to_le16(UDF_SB_SERIALNUM(inode->i_sb));
|
| 1525 |
|
|
fe->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum);
|
| 1526 |
|
|
crclen += UDF_I_LENEATTR(inode) + UDF_I_LENALLOC(inode) - sizeof(tag);
|
| 1527 |
|
|
fe->descTag.descCRCLength = cpu_to_le16(crclen);
|
| 1528 |
|
|
fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), crclen, 0));
|
| 1529 |
|
|
|
| 1530 |
|
|
fe->descTag.tagChecksum = 0;
|
| 1531 |
|
|
for (i=0; i<16; i++)
|
| 1532 |
|
|
if (i != 4)
|
| 1533 |
|
|
fe->descTag.tagChecksum += ((uint8_t *)&(fe->descTag))[i];
|
| 1534 |
|
|
|
| 1535 |
|
|
/* write the data blocks */
|
| 1536 |
|
|
mark_buffer_dirty(bh);
|
| 1537 |
|
|
if (do_sync)
|
| 1538 |
|
|
{
|
| 1539 |
|
|
ll_rw_block(WRITE, 1, &bh);
|
| 1540 |
|
|
wait_on_buffer(bh);
|
| 1541 |
|
|
if (buffer_req(bh) && !buffer_uptodate(bh))
|
| 1542 |
|
|
{
|
| 1543 |
|
|
printk("IO error syncing udf inode [%s:%08lx]\n",
|
| 1544 |
|
|
bdevname(inode->i_dev), inode->i_ino);
|
| 1545 |
|
|
err = -EIO;
|
| 1546 |
|
|
}
|
| 1547 |
|
|
}
|
| 1548 |
|
|
udf_release_data(bh);
|
| 1549 |
|
|
return err;
|
| 1550 |
|
|
}
|
| 1551 |
|
|
|
| 1552 |
|
|
/*
|
| 1553 |
|
|
* udf_iget
|
| 1554 |
|
|
*
|
| 1555 |
|
|
* PURPOSE
|
| 1556 |
|
|
* Get an inode.
|
| 1557 |
|
|
*
|
| 1558 |
|
|
* DESCRIPTION
|
| 1559 |
|
|
* This routine replaces iget() and read_inode().
|
| 1560 |
|
|
*
|
| 1561 |
|
|
* HISTORY
|
| 1562 |
|
|
* October 3, 1997 - Andrew E. Mileski
|
| 1563 |
|
|
* Written, tested, and released.
|
| 1564 |
|
|
*
|
| 1565 |
|
|
* 12/19/98 dgb Added semaphore and changed to be a wrapper of iget
|
| 1566 |
|
|
*/
|
| 1567 |
|
|
struct inode *
|
| 1568 |
|
|
udf_iget(struct super_block *sb, lb_addr ino)
|
| 1569 |
|
|
{
|
| 1570 |
|
|
struct inode *inode;
|
| 1571 |
|
|
unsigned long block;
|
| 1572 |
|
|
|
| 1573 |
|
|
block = udf_get_lb_pblock(sb, ino, 0);
|
| 1574 |
|
|
|
| 1575 |
|
|
/* Get the inode */
|
| 1576 |
|
|
|
| 1577 |
|
|
inode = iget(sb, block);
|
| 1578 |
|
|
/* calls udf_read_inode() ! */
|
| 1579 |
|
|
|
| 1580 |
|
|
if (!inode)
|
| 1581 |
|
|
{
|
| 1582 |
|
|
printk(KERN_ERR "udf: iget() failed\n");
|
| 1583 |
|
|
return NULL;
|
| 1584 |
|
|
}
|
| 1585 |
|
|
else if (is_bad_inode(inode))
|
| 1586 |
|
|
{
|
| 1587 |
|
|
iput(inode);
|
| 1588 |
|
|
return NULL;
|
| 1589 |
|
|
}
|
| 1590 |
|
|
else if (UDF_I_LOCATION(inode).logicalBlockNum == 0xFFFFFFFF &&
|
| 1591 |
|
|
UDF_I_LOCATION(inode).partitionReferenceNum == 0xFFFF)
|
| 1592 |
|
|
{
|
| 1593 |
|
|
memcpy(&UDF_I_LOCATION(inode), &ino, sizeof(lb_addr));
|
| 1594 |
|
|
__udf_read_inode(inode);
|
| 1595 |
|
|
if (is_bad_inode(inode))
|
| 1596 |
|
|
{
|
| 1597 |
|
|
iput(inode);
|
| 1598 |
|
|
return NULL;
|
| 1599 |
|
|
}
|
| 1600 |
|
|
}
|
| 1601 |
|
|
|
| 1602 |
|
|
if ( ino.logicalBlockNum >= UDF_SB_PARTLEN(sb, ino.partitionReferenceNum) )
|
| 1603 |
|
|
{
|
| 1604 |
|
|
udf_debug("block=%d, partition=%d out of range\n",
|
| 1605 |
|
|
ino.logicalBlockNum, ino.partitionReferenceNum);
|
| 1606 |
|
|
make_bad_inode(inode);
|
| 1607 |
|
|
iput(inode);
|
| 1608 |
|
|
return NULL;
|
| 1609 |
|
|
}
|
| 1610 |
|
|
|
| 1611 |
|
|
return inode;
|
| 1612 |
|
|
}
|
| 1613 |
|
|
|
| 1614 |
|
|
int8_t udf_add_aext(struct inode *inode, lb_addr *bloc, int *extoffset,
|
| 1615 |
|
|
lb_addr eloc, uint32_t elen, struct buffer_head **bh, int inc)
|
| 1616 |
|
|
{
|
| 1617 |
|
|
int adsize;
|
| 1618 |
|
|
short_ad *sad = NULL;
|
| 1619 |
|
|
long_ad *lad = NULL;
|
| 1620 |
|
|
struct allocExtDesc *aed;
|
| 1621 |
|
|
int8_t etype;
|
| 1622 |
|
|
|
| 1623 |
|
|
if (!(*bh))
|
| 1624 |
|
|
{
|
| 1625 |
|
|
if (!(*bh = udf_tread(inode->i_sb,
|
| 1626 |
|
|
udf_get_lb_pblock(inode->i_sb, *bloc, 0))))
|
| 1627 |
|
|
{
|
| 1628 |
|
|
udf_debug("reading block %d failed!\n",
|
| 1629 |
|
|
udf_get_lb_pblock(inode->i_sb, *bloc, 0));
|
| 1630 |
|
|
return -1;
|
| 1631 |
|
|
}
|
| 1632 |
|
|
}
|
| 1633 |
|
|
|
| 1634 |
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
|
| 1635 |
|
|
adsize = sizeof(short_ad);
|
| 1636 |
|
|
else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
|
| 1637 |
|
|
adsize = sizeof(long_ad);
|
| 1638 |
|
|
else
|
| 1639 |
|
|
return -1;
|
| 1640 |
|
|
|
| 1641 |
|
|
if (*extoffset + (2 * adsize) > inode->i_sb->s_blocksize)
|
| 1642 |
|
|
{
|
| 1643 |
|
|
char *sptr, *dptr;
|
| 1644 |
|
|
struct buffer_head *nbh;
|
| 1645 |
|
|
int err, loffset;
|
| 1646 |
|
|
lb_addr obloc = *bloc;
|
| 1647 |
|
|
|
| 1648 |
|
|
if (!(bloc->logicalBlockNum = udf_new_block(inode->i_sb, inode,
|
| 1649 |
|
|
obloc.partitionReferenceNum, obloc.logicalBlockNum, &err)))
|
| 1650 |
|
|
{
|
| 1651 |
|
|
return -1;
|
| 1652 |
|
|
}
|
| 1653 |
|
|
if (!(nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
|
| 1654 |
|
|
*bloc, 0))))
|
| 1655 |
|
|
{
|
| 1656 |
|
|
return -1;
|
| 1657 |
|
|
}
|
| 1658 |
|
|
lock_buffer(nbh);
|
| 1659 |
|
|
memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
|
| 1660 |
|
|
mark_buffer_uptodate(nbh, 1);
|
| 1661 |
|
|
unlock_buffer(nbh);
|
| 1662 |
|
|
mark_buffer_dirty_inode(nbh, inode);
|
| 1663 |
|
|
|
| 1664 |
|
|
aed = (struct allocExtDesc *)(nbh->b_data);
|
| 1665 |
|
|
if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
|
| 1666 |
|
|
aed->previousAllocExtLocation = cpu_to_le32(obloc.logicalBlockNum);
|
| 1667 |
|
|
if (*extoffset + adsize > inode->i_sb->s_blocksize)
|
| 1668 |
|
|
{
|
| 1669 |
|
|
loffset = *extoffset;
|
| 1670 |
|
|
aed->lengthAllocDescs = cpu_to_le32(adsize);
|
| 1671 |
|
|
sptr = (*bh)->b_data + *extoffset - adsize;
|
| 1672 |
|
|
dptr = nbh->b_data + sizeof(struct allocExtDesc);
|
| 1673 |
|
|
memcpy(dptr, sptr, adsize);
|
| 1674 |
|
|
*extoffset = sizeof(struct allocExtDesc) + adsize;
|
| 1675 |
|
|
}
|
| 1676 |
|
|
else
|
| 1677 |
|
|
{
|
| 1678 |
|
|
loffset = *extoffset + adsize;
|
| 1679 |
|
|
aed->lengthAllocDescs = cpu_to_le32(0);
|
| 1680 |
|
|
sptr = (*bh)->b_data + *extoffset;
|
| 1681 |
|
|
*extoffset = sizeof(struct allocExtDesc);
|
| 1682 |
|
|
|
| 1683 |
|
|
if (memcmp(&UDF_I_LOCATION(inode), &obloc, sizeof(lb_addr)))
|
| 1684 |
|
|
{
|
| 1685 |
|
|
aed = (struct allocExtDesc *)(*bh)->b_data;
|
| 1686 |
|
|
aed->lengthAllocDescs =
|
| 1687 |
|
|
cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize);
|
| 1688 |
|
|
}
|
| 1689 |
|
|
else
|
| 1690 |
|
|
{
|
| 1691 |
|
|
UDF_I_LENALLOC(inode) += adsize;
|
| 1692 |
|
|
mark_inode_dirty(inode);
|
| 1693 |
|
|
}
|
| 1694 |
|
|
}
|
| 1695 |
|
|
if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200)
|
| 1696 |
|
|
udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
|
| 1697 |
|
|
bloc->logicalBlockNum, sizeof(tag));
|
| 1698 |
|
|
else
|
| 1699 |
|
|
udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
|
| 1700 |
|
|
bloc->logicalBlockNum, sizeof(tag));
|
| 1701 |
|
|
switch (UDF_I_ALLOCTYPE(inode))
|
| 1702 |
|
|
{
|
| 1703 |
|
|
case ICBTAG_FLAG_AD_SHORT:
|
| 1704 |
|
|
{
|
| 1705 |
|
|
sad = (short_ad *)sptr;
|
| 1706 |
|
|
sad->extLength = cpu_to_le32(
|
| 1707 |
|
|
EXT_NEXT_EXTENT_ALLOCDECS |
|
| 1708 |
|
|
inode->i_sb->s_blocksize);
|
| 1709 |
|
|
sad->extPosition = cpu_to_le32(bloc->logicalBlockNum);
|
| 1710 |
|
|
break;
|
| 1711 |
|
|
}
|
| 1712 |
|
|
case ICBTAG_FLAG_AD_LONG:
|
| 1713 |
|
|
{
|
| 1714 |
|
|
lad = (long_ad *)sptr;
|
| 1715 |
|
|
lad->extLength = cpu_to_le32(
|
| 1716 |
|
|
EXT_NEXT_EXTENT_ALLOCDECS |
|
| 1717 |
|
|
inode->i_sb->s_blocksize);
|
| 1718 |
|
|
lad->extLocation = cpu_to_lelb(*bloc);
|
| 1719 |
|
|
memset(lad->impUse, 0x00, sizeof(lad->impUse));
|
| 1720 |
|
|
break;
|
| 1721 |
|
|
}
|
| 1722 |
|
|
}
|
| 1723 |
|
|
if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
|
| 1724 |
|
|
udf_update_tag((*bh)->b_data, loffset);
|
| 1725 |
|
|
else
|
| 1726 |
|
|
udf_update_tag((*bh)->b_data, sizeof(struct allocExtDesc));
|
| 1727 |
|
|
mark_buffer_dirty_inode(*bh, inode);
|
| 1728 |
|
|
udf_release_data(*bh);
|
| 1729 |
|
|
*bh = nbh;
|
| 1730 |
|
|
}
|
| 1731 |
|
|
|
| 1732 |
|
|
etype = udf_write_aext(inode, *bloc, extoffset, eloc, elen, *bh, inc);
|
| 1733 |
|
|
|
| 1734 |
|
|
if (!memcmp(&UDF_I_LOCATION(inode), bloc, sizeof(lb_addr)))
|
| 1735 |
|
|
{
|
| 1736 |
|
|
UDF_I_LENALLOC(inode) += adsize;
|
| 1737 |
|
|
mark_inode_dirty(inode);
|
| 1738 |
|
|
}
|
| 1739 |
|
|
else
|
| 1740 |
|
|
{
|
| 1741 |
|
|
aed = (struct allocExtDesc *)(*bh)->b_data;
|
| 1742 |
|
|
aed->lengthAllocDescs =
|
| 1743 |
|
|
cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize);
|
| 1744 |
|
|
if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
|
| 1745 |
|
|
udf_update_tag((*bh)->b_data, *extoffset + (inc ? 0 : adsize));
|
| 1746 |
|
|
else
|
| 1747 |
|
|
udf_update_tag((*bh)->b_data, sizeof(struct allocExtDesc));
|
| 1748 |
|
|
mark_buffer_dirty_inode(*bh, inode);
|
| 1749 |
|
|
}
|
| 1750 |
|
|
|
| 1751 |
|
|
return etype;
|
| 1752 |
|
|
}
|
| 1753 |
|
|
|
| 1754 |
|
|
int8_t udf_write_aext(struct inode *inode, lb_addr bloc, int *extoffset,
|
| 1755 |
|
|
lb_addr eloc, uint32_t elen, struct buffer_head *bh, int inc)
|
| 1756 |
|
|
{
|
| 1757 |
|
|
int adsize;
|
| 1758 |
|
|
short_ad *sad = NULL;
|
| 1759 |
|
|
long_ad *lad = NULL;
|
| 1760 |
|
|
|
| 1761 |
|
|
if (!(bh))
|
| 1762 |
|
|
{
|
| 1763 |
|
|
if (!(bh = udf_tread(inode->i_sb,
|
| 1764 |
|
|
udf_get_lb_pblock(inode->i_sb, bloc, 0))))
|
| 1765 |
|
|
{
|
| 1766 |
|
|
udf_debug("reading block %d failed!\n",
|
| 1767 |
|
|
udf_get_lb_pblock(inode->i_sb, bloc, 0));
|
| 1768 |
|
|
return -1;
|
| 1769 |
|
|
}
|
| 1770 |
|
|
}
|
| 1771 |
|
|
else
|
| 1772 |
|
|
atomic_inc(&bh->b_count);
|
| 1773 |
|
|
|
| 1774 |
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
|
| 1775 |
|
|
adsize = sizeof(short_ad);
|
| 1776 |
|
|
else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
|
| 1777 |
|
|
adsize = sizeof(long_ad);
|
| 1778 |
|
|
else
|
| 1779 |
|
|
return -1;
|
| 1780 |
|
|
|
| 1781 |
|
|
switch (UDF_I_ALLOCTYPE(inode))
|
| 1782 |
|
|
{
|
| 1783 |
|
|
case ICBTAG_FLAG_AD_SHORT:
|
| 1784 |
|
|
{
|
| 1785 |
|
|
sad = (short_ad *)((bh)->b_data + *extoffset);
|
| 1786 |
|
|
sad->extLength = cpu_to_le32(elen);
|
| 1787 |
|
|
sad->extPosition = cpu_to_le32(eloc.logicalBlockNum);
|
| 1788 |
|
|
break;
|
| 1789 |
|
|
}
|
| 1790 |
|
|
case ICBTAG_FLAG_AD_LONG:
|
| 1791 |
|
|
{
|
| 1792 |
|
|
lad = (long_ad *)((bh)->b_data + *extoffset);
|
| 1793 |
|
|
lad->extLength = cpu_to_le32(elen);
|
| 1794 |
|
|
lad->extLocation = cpu_to_lelb(eloc);
|
| 1795 |
|
|
memset(lad->impUse, 0x00, sizeof(lad->impUse));
|
| 1796 |
|
|
break;
|
| 1797 |
|
|
}
|
| 1798 |
|
|
}
|
| 1799 |
|
|
|
| 1800 |
|
|
if (memcmp(&UDF_I_LOCATION(inode), &bloc, sizeof(lb_addr)))
|
| 1801 |
|
|
{
|
| 1802 |
|
|
if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
|
| 1803 |
|
|
{
|
| 1804 |
|
|
struct allocExtDesc *aed = (struct allocExtDesc *)(bh)->b_data;
|
| 1805 |
|
|
udf_update_tag((bh)->b_data,
|
| 1806 |
|
|
le32_to_cpu(aed->lengthAllocDescs) + sizeof(struct allocExtDesc));
|
| 1807 |
|
|
}
|
| 1808 |
|
|
mark_buffer_dirty_inode(bh, inode);
|
| 1809 |
|
|
}
|
| 1810 |
|
|
else
|
| 1811 |
|
|
{
|
| 1812 |
|
|
mark_inode_dirty(inode);
|
| 1813 |
|
|
mark_buffer_dirty(bh);
|
| 1814 |
|
|
}
|
| 1815 |
|
|
|
| 1816 |
|
|
if (inc)
|
| 1817 |
|
|
*extoffset += adsize;
|
| 1818 |
|
|
udf_release_data(bh);
|
| 1819 |
|
|
return (elen >> 30);
|
| 1820 |
|
|
}
|
| 1821 |
|
|
|
| 1822 |
|
|
int8_t udf_next_aext(struct inode *inode, lb_addr *bloc, int *extoffset,
|
| 1823 |
|
|
lb_addr *eloc, uint32_t *elen, struct buffer_head **bh, int inc)
|
| 1824 |
|
|
{
|
| 1825 |
|
|
uint16_t tagIdent;
|
| 1826 |
|
|
int pos, alen;
|
| 1827 |
|
|
int8_t etype;
|
| 1828 |
|
|
|
| 1829 |
|
|
if (!(*bh))
|
| 1830 |
|
|
{
|
| 1831 |
|
|
if (!(*bh = udf_tread(inode->i_sb,
|
| 1832 |
|
|
udf_get_lb_pblock(inode->i_sb, *bloc, 0))))
|
| 1833 |
|
|
{
|
| 1834 |
|
|
udf_debug("reading block %d failed!\n",
|
| 1835 |
|
|
udf_get_lb_pblock(inode->i_sb, *bloc, 0));
|
| 1836 |
|
|
return -1;
|
| 1837 |
|
|
}
|
| 1838 |
|
|
}
|
| 1839 |
|
|
|
| 1840 |
|
|
tagIdent = le16_to_cpu(((tag *)(*bh)->b_data)->tagIdent);
|
| 1841 |
|
|
|
| 1842 |
|
|
if (!memcmp(&UDF_I_LOCATION(inode), bloc, sizeof(lb_addr)))
|
| 1843 |
|
|
{
|
| 1844 |
|
|
if (tagIdent == TAG_IDENT_FE || tagIdent == TAG_IDENT_EFE ||
|
| 1845 |
|
|
UDF_I_NEW_INODE(inode))
|
| 1846 |
|
|
{
|
| 1847 |
|
|
pos = udf_file_entry_alloc_offset(inode);
|
| 1848 |
|
|
alen = UDF_I_LENALLOC(inode) + pos;
|
| 1849 |
|
|
}
|
| 1850 |
|
|
else if (tagIdent == TAG_IDENT_USE)
|
| 1851 |
|
|
{
|
| 1852 |
|
|
pos = sizeof(struct unallocSpaceEntry);
|
| 1853 |
|
|
alen = UDF_I_LENALLOC(inode) + pos;
|
| 1854 |
|
|
}
|
| 1855 |
|
|
else
|
| 1856 |
|
|
return -1;
|
| 1857 |
|
|
}
|
| 1858 |
|
|
else if (tagIdent == TAG_IDENT_AED)
|
| 1859 |
|
|
{
|
| 1860 |
|
|
struct allocExtDesc *aed = (struct allocExtDesc *)(*bh)->b_data;
|
| 1861 |
|
|
|
| 1862 |
|
|
pos = sizeof(struct allocExtDesc);
|
| 1863 |
|
|
alen = le32_to_cpu(aed->lengthAllocDescs) + pos;
|
| 1864 |
|
|
}
|
| 1865 |
|
|
else
|
| 1866 |
|
|
return -1;
|
| 1867 |
|
|
|
| 1868 |
|
|
if (!(*extoffset))
|
| 1869 |
|
|
*extoffset = pos;
|
| 1870 |
|
|
|
| 1871 |
|
|
switch (UDF_I_ALLOCTYPE(inode))
|
| 1872 |
|
|
{
|
| 1873 |
|
|
case ICBTAG_FLAG_AD_SHORT:
|
| 1874 |
|
|
{
|
| 1875 |
|
|
short_ad *sad;
|
| 1876 |
|
|
|
| 1877 |
|
|
if (!(sad = udf_get_fileshortad((*bh)->b_data, alen, extoffset, inc)))
|
| 1878 |
|
|
return -1;
|
| 1879 |
|
|
|
| 1880 |
|
|
if ((etype = le32_to_cpu(sad->extLength) >> 30) == (EXT_NEXT_EXTENT_ALLOCDECS >> 30))
|
| 1881 |
|
|
{
|
| 1882 |
|
|
bloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
|
| 1883 |
|
|
*extoffset = 0;
|
| 1884 |
|
|
udf_release_data(*bh);
|
| 1885 |
|
|
*bh = NULL;
|
| 1886 |
|
|
return udf_next_aext(inode, bloc, extoffset, eloc, elen, bh, inc);
|
| 1887 |
|
|
}
|
| 1888 |
|
|
else
|
| 1889 |
|
|
{
|
| 1890 |
|
|
eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
|
| 1891 |
|
|
eloc->partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum;
|
| 1892 |
|
|
*elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
|
| 1893 |
|
|
}
|
| 1894 |
|
|
break;
|
| 1895 |
|
|
}
|
| 1896 |
|
|
case ICBTAG_FLAG_AD_LONG:
|
| 1897 |
|
|
{
|
| 1898 |
|
|
long_ad *lad;
|
| 1899 |
|
|
|
| 1900 |
|
|
if (!(lad = udf_get_filelongad((*bh)->b_data, alen, extoffset, inc)))
|
| 1901 |
|
|
return -1;
|
| 1902 |
|
|
|
| 1903 |
|
|
if ((etype = le32_to_cpu(lad->extLength) >> 30) == (EXT_NEXT_EXTENT_ALLOCDECS >> 30))
|
| 1904 |
|
|
{
|
| 1905 |
|
|
*bloc = lelb_to_cpu(lad->extLocation);
|
| 1906 |
|
|
*extoffset = 0;
|
| 1907 |
|
|
udf_release_data(*bh);
|
| 1908 |
|
|
*bh = NULL;
|
| 1909 |
|
|
return udf_next_aext(inode, bloc, extoffset, eloc, elen, bh, inc);
|
| 1910 |
|
|
}
|
| 1911 |
|
|
else
|
| 1912 |
|
|
{
|
| 1913 |
|
|
*eloc = lelb_to_cpu(lad->extLocation);
|
| 1914 |
|
|
*elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
|
| 1915 |
|
|
}
|
| 1916 |
|
|
break;
|
| 1917 |
|
|
}
|
| 1918 |
|
|
case ICBTAG_FLAG_AD_IN_ICB:
|
| 1919 |
|
|
{
|
| 1920 |
|
|
if (UDF_I_LENALLOC(inode) == 0)
|
| 1921 |
|
|
return -1;
|
| 1922 |
|
|
etype = (EXT_RECORDED_ALLOCATED >> 30);
|
| 1923 |
|
|
*eloc = UDF_I_LOCATION(inode);
|
| 1924 |
|
|
*elen = UDF_I_LENALLOC(inode);
|
| 1925 |
|
|
break;
|
| 1926 |
|
|
}
|
| 1927 |
|
|
default:
|
| 1928 |
|
|
{
|
| 1929 |
|
|
udf_debug("alloc_type = %d unsupported\n", UDF_I_ALLOCTYPE(inode));
|
| 1930 |
|
|
return -1;
|
| 1931 |
|
|
}
|
| 1932 |
|
|
}
|
| 1933 |
|
|
if (*elen)
|
| 1934 |
|
|
return etype;
|
| 1935 |
|
|
|
| 1936 |
|
|
udf_debug("Empty Extent, inode=%ld, alloctype=%d, eloc=%d, elen=%d, etype=%d, extoffset=%d\n",
|
| 1937 |
|
|
inode->i_ino, UDF_I_ALLOCTYPE(inode), eloc->logicalBlockNum, *elen, etype, *extoffset);
|
| 1938 |
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
|
| 1939 |
|
|
*extoffset -= sizeof(short_ad);
|
| 1940 |
|
|
else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
|
| 1941 |
|
|
*extoffset -= sizeof(long_ad);
|
| 1942 |
|
|
return -1;
|
| 1943 |
|
|
}
|
| 1944 |
|
|
|
| 1945 |
|
|
int8_t udf_current_aext(struct inode *inode, lb_addr *bloc, int *extoffset,
|
| 1946 |
|
|
lb_addr *eloc, uint32_t *elen, struct buffer_head **bh, int inc)
|
| 1947 |
|
|
{
|
| 1948 |
|
|
int pos, alen;
|
| 1949 |
|
|
int8_t etype;
|
| 1950 |
|
|
|
| 1951 |
|
|
if (!(*bh))
|
| 1952 |
|
|
{
|
| 1953 |
|
|
if (!(*bh = udf_tread(inode->i_sb,
|
| 1954 |
|
|
udf_get_lb_pblock(inode->i_sb, *bloc, 0))))
|
| 1955 |
|
|
{
|
| 1956 |
|
|
udf_debug("reading block %d failed!\n",
|
| 1957 |
|
|
udf_get_lb_pblock(inode->i_sb, *bloc, 0));
|
| 1958 |
|
|
return -1;
|
| 1959 |
|
|
}
|
| 1960 |
|
|
}
|
| 1961 |
|
|
|
| 1962 |
|
|
if (!memcmp(&UDF_I_LOCATION(inode), bloc, sizeof(lb_addr)))
|
| 1963 |
|
|
{
|
| 1964 |
|
|
if (!(UDF_I_EXTENDED_FE(inode)))
|
| 1965 |
|
|
pos = sizeof(struct fileEntry) + UDF_I_LENEATTR(inode);
|
| 1966 |
|
|
else
|
| 1967 |
|
|
pos = sizeof(struct extendedFileEntry) + UDF_I_LENEATTR(inode);
|
| 1968 |
|
|
alen = UDF_I_LENALLOC(inode) + pos;
|
| 1969 |
|
|
}
|
| 1970 |
|
|
else
|
| 1971 |
|
|
{
|
| 1972 |
|
|
struct allocExtDesc *aed = (struct allocExtDesc *)(*bh)->b_data;
|
| 1973 |
|
|
|
| 1974 |
|
|
pos = sizeof(struct allocExtDesc);
|
| 1975 |
|
|
alen = le32_to_cpu(aed->lengthAllocDescs) + pos;
|
| 1976 |
|
|
}
|
| 1977 |
|
|
|
| 1978 |
|
|
if (!(*extoffset))
|
| 1979 |
|
|
*extoffset = pos;
|
| 1980 |
|
|
|
| 1981 |
|
|
switch (UDF_I_ALLOCTYPE(inode))
|
| 1982 |
|
|
{
|
| 1983 |
|
|
case ICBTAG_FLAG_AD_SHORT:
|
| 1984 |
|
|
{
|
| 1985 |
|
|
short_ad *sad;
|
| 1986 |
|
|
|
| 1987 |
|
|
if (!(sad = udf_get_fileshortad((*bh)->b_data, alen, extoffset, inc)))
|
| 1988 |
|
|
return -1;
|
| 1989 |
|
|
|
| 1990 |
|
|
etype = le32_to_cpu(sad->extLength) >> 30;
|
| 1991 |
|
|
eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
|
| 1992 |
|
|
eloc->partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum;
|
| 1993 |
|
|
*elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
|
| 1994 |
|
|
break;
|
| 1995 |
|
|
}
|
| 1996 |
|
|
case ICBTAG_FLAG_AD_LONG:
|
| 1997 |
|
|
{
|
| 1998 |
|
|
long_ad *lad;
|
| 1999 |
|
|
|
| 2000 |
|
|
if (!(lad = udf_get_filelongad((*bh)->b_data, alen, extoffset, inc)))
|
| 2001 |
|
|
return -1;
|
| 2002 |
|
|
|
| 2003 |
|
|
etype = le32_to_cpu(lad->extLength) >> 30;
|
| 2004 |
|
|
*eloc = lelb_to_cpu(lad->extLocation);
|
| 2005 |
|
|
*elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
|
| 2006 |
|
|
break;
|
| 2007 |
|
|
}
|
| 2008 |
|
|
default:
|
| 2009 |
|
|
{
|
| 2010 |
|
|
udf_debug("alloc_type = %d unsupported\n", UDF_I_ALLOCTYPE(inode));
|
| 2011 |
|
|
return -1;
|
| 2012 |
|
|
}
|
| 2013 |
|
|
}
|
| 2014 |
|
|
if (*elen)
|
| 2015 |
|
|
return etype;
|
| 2016 |
|
|
|
| 2017 |
|
|
udf_debug("Empty Extent!\n");
|
| 2018 |
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
|
| 2019 |
|
|
*extoffset -= sizeof(short_ad);
|
| 2020 |
|
|
else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
|
| 2021 |
|
|
*extoffset -= sizeof(long_ad);
|
| 2022 |
|
|
return -1;
|
| 2023 |
|
|
}
|
| 2024 |
|
|
|
| 2025 |
|
|
int8_t udf_insert_aext(struct inode *inode, lb_addr bloc, int extoffset,
|
| 2026 |
|
|
lb_addr neloc, uint32_t nelen, struct buffer_head *bh)
|
| 2027 |
|
|
{
|
| 2028 |
|
|
lb_addr oeloc;
|
| 2029 |
|
|
uint32_t oelen;
|
| 2030 |
|
|
int8_t etype;
|
| 2031 |
|
|
|
| 2032 |
|
|
if (!bh)
|
| 2033 |
|
|
{
|
| 2034 |
|
|
if (!(bh = udf_tread(inode->i_sb,
|
| 2035 |
|
|
udf_get_lb_pblock(inode->i_sb, bloc, 0))))
|
| 2036 |
|
|
{
|
| 2037 |
|
|
udf_debug("reading block %d failed!\n",
|
| 2038 |
|
|
udf_get_lb_pblock(inode->i_sb, bloc, 0));
|
| 2039 |
|
|
return -1;
|
| 2040 |
|
|
}
|
| 2041 |
|
|
}
|
| 2042 |
|
|
else
|
| 2043 |
|
|
atomic_inc(&bh->b_count);
|
| 2044 |
|
|
|
| 2045 |
|
|
while ((etype = udf_next_aext(inode, &bloc, &extoffset, &oeloc, &oelen, &bh, 0)) != -1)
|
| 2046 |
|
|
{
|
| 2047 |
|
|
udf_write_aext(inode, bloc, &extoffset, neloc, nelen, bh, 1);
|
| 2048 |
|
|
|
| 2049 |
|
|
neloc = oeloc;
|
| 2050 |
|
|
nelen = (etype << 30) | oelen;
|
| 2051 |
|
|
}
|
| 2052 |
|
|
udf_add_aext(inode, &bloc, &extoffset, neloc, nelen, &bh, 1);
|
| 2053 |
|
|
udf_release_data(bh);
|
| 2054 |
|
|
return (nelen >> 30);
|
| 2055 |
|
|
}
|
| 2056 |
|
|
|
| 2057 |
|
|
int8_t udf_delete_aext(struct inode *inode, lb_addr nbloc, int nextoffset,
|
| 2058 |
|
|
lb_addr eloc, uint32_t elen, struct buffer_head *nbh)
|
| 2059 |
|
|
{
|
| 2060 |
|
|
struct buffer_head *obh;
|
| 2061 |
|
|
lb_addr obloc;
|
| 2062 |
|
|
int oextoffset, adsize;
|
| 2063 |
|
|
int8_t etype;
|
| 2064 |
|
|
struct allocExtDesc *aed;
|
| 2065 |
|
|
|
| 2066 |
|
|
if (!(nbh))
|
| 2067 |
|
|
{
|
| 2068 |
|
|
if (!(nbh = udf_tread(inode->i_sb,
|
| 2069 |
|
|
udf_get_lb_pblock(inode->i_sb, nbloc, 0))))
|
| 2070 |
|
|
{
|
| 2071 |
|
|
udf_debug("reading block %d failed!\n",
|
| 2072 |
|
|
udf_get_lb_pblock(inode->i_sb, nbloc, 0));
|
| 2073 |
|
|
return -1;
|
| 2074 |
|
|
}
|
| 2075 |
|
|
}
|
| 2076 |
|
|
else
|
| 2077 |
|
|
atomic_inc(&nbh->b_count);
|
| 2078 |
|
|
atomic_inc(&nbh->b_count);
|
| 2079 |
|
|
|
| 2080 |
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
|
| 2081 |
|
|
adsize = sizeof(short_ad);
|
| 2082 |
|
|
else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
|
| 2083 |
|
|
adsize = sizeof(long_ad);
|
| 2084 |
|
|
else
|
| 2085 |
|
|
adsize = 0;
|
| 2086 |
|
|
|
| 2087 |
|
|
obh = nbh;
|
| 2088 |
|
|
obloc = nbloc;
|
| 2089 |
|
|
oextoffset = nextoffset;
|
| 2090 |
|
|
|
| 2091 |
|
|
if (udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1) == -1)
|
| 2092 |
|
|
return -1;
|
| 2093 |
|
|
|
| 2094 |
|
|
while ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1)) != -1)
|
| 2095 |
|
|
{
|
| 2096 |
|
|
udf_write_aext(inode, obloc, &oextoffset, eloc, (etype << 30) | elen, obh, 1);
|
| 2097 |
|
|
if (memcmp(&nbloc, &obloc, sizeof(lb_addr)))
|
| 2098 |
|
|
{
|
| 2099 |
|
|
obloc = nbloc;
|
| 2100 |
|
|
udf_release_data(obh);
|
| 2101 |
|
|
atomic_inc(&nbh->b_count);
|
| 2102 |
|
|
obh = nbh;
|
| 2103 |
|
|
oextoffset = nextoffset - adsize;
|
| 2104 |
|
|
}
|
| 2105 |
|
|
}
|
| 2106 |
|
|
memset(&eloc, 0x00, sizeof(lb_addr));
|
| 2107 |
|
|
elen = 0;
|
| 2108 |
|
|
|
| 2109 |
|
|
if (memcmp(&nbloc, &obloc, sizeof(lb_addr)))
|
| 2110 |
|
|
{
|
| 2111 |
|
|
udf_free_blocks(inode->i_sb, inode, nbloc, 0, 1);
|
| 2112 |
|
|
udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1);
|
| 2113 |
|
|
udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1);
|
| 2114 |
|
|
if (!memcmp(&UDF_I_LOCATION(inode), &obloc, sizeof(lb_addr)))
|
| 2115 |
|
|
{
|
| 2116 |
|
|
UDF_I_LENALLOC(inode) -= (adsize * 2);
|
| 2117 |
|
|
mark_inode_dirty(inode);
|
| 2118 |
|
|
}
|
| 2119 |
|
|
else
|
| 2120 |
|
|
{
|
| 2121 |
|
|
aed = (struct allocExtDesc *)(obh)->b_data;
|
| 2122 |
|
|
aed->lengthAllocDescs =
|
| 2123 |
|
|
cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - (2*adsize));
|
| 2124 |
|
|
if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
|
| 2125 |
|
|
udf_update_tag((obh)->b_data, oextoffset - (2*adsize));
|
| 2126 |
|
|
else
|
| 2127 |
|
|
udf_update_tag((obh)->b_data, sizeof(struct allocExtDesc));
|
| 2128 |
|
|
mark_buffer_dirty_inode(obh, inode);
|
| 2129 |
|
|
}
|
| 2130 |
|
|
}
|
| 2131 |
|
|
else
|
| 2132 |
|
|
{
|
| 2133 |
|
|
udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1);
|
| 2134 |
|
|
if (!memcmp(&UDF_I_LOCATION(inode), &obloc, sizeof(lb_addr)))
|
| 2135 |
|
|
{
|
| 2136 |
|
|
UDF_I_LENALLOC(inode) -= adsize;
|
| 2137 |
|
|
mark_inode_dirty(inode);
|
| 2138 |
|
|
}
|
| 2139 |
|
|
else
|
| 2140 |
|
|
{
|
| 2141 |
|
|
aed = (struct allocExtDesc *)(obh)->b_data;
|
| 2142 |
|
|
aed->lengthAllocDescs =
|
| 2143 |
|
|
cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - adsize);
|
| 2144 |
|
|
if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
|
| 2145 |
|
|
udf_update_tag((obh)->b_data, oextoffset - adsize);
|
| 2146 |
|
|
else
|
| 2147 |
|
|
udf_update_tag((obh)->b_data, sizeof(struct allocExtDesc));
|
| 2148 |
|
|
mark_buffer_dirty_inode(obh, inode);
|
| 2149 |
|
|
}
|
| 2150 |
|
|
}
|
| 2151 |
|
|
|
| 2152 |
|
|
udf_release_data(nbh);
|
| 2153 |
|
|
udf_release_data(obh);
|
| 2154 |
|
|
return (elen >> 30);
|
| 2155 |
|
|
}
|
| 2156 |
|
|
|
| 2157 |
|
|
int8_t inode_bmap(struct inode *inode, int block, lb_addr *bloc, uint32_t *extoffset,
|
| 2158 |
|
|
lb_addr *eloc, uint32_t *elen, uint32_t *offset, struct buffer_head **bh)
|
| 2159 |
|
|
{
|
| 2160 |
|
|
uint64_t lbcount = 0, bcount = (uint64_t)block << inode->i_sb->s_blocksize_bits;
|
| 2161 |
|
|
int8_t etype;
|
| 2162 |
|
|
|
| 2163 |
|
|
if (block < 0)
|
| 2164 |
|
|
{
|
| 2165 |
|
|
printk(KERN_ERR "udf: inode_bmap: block < 0\n");
|
| 2166 |
|
|
return -1;
|
| 2167 |
|
|
}
|
| 2168 |
|
|
if (!inode)
|
| 2169 |
|
|
{
|
| 2170 |
|
|
printk(KERN_ERR "udf: inode_bmap: NULL inode\n");
|
| 2171 |
|
|
return -1;
|
| 2172 |
|
|
}
|
| 2173 |
|
|
|
| 2174 |
|
|
*extoffset = 0;
|
| 2175 |
|
|
*elen = 0;
|
| 2176 |
|
|
*bloc = UDF_I_LOCATION(inode);
|
| 2177 |
|
|
|
| 2178 |
|
|
do
|
| 2179 |
|
|
{
|
| 2180 |
|
|
if ((etype = udf_next_aext(inode, bloc, extoffset, eloc, elen, bh, 1)) == -1)
|
| 2181 |
|
|
{
|
| 2182 |
|
|
*offset = bcount - lbcount;
|
| 2183 |
|
|
UDF_I_LENEXTENTS(inode) = lbcount;
|
| 2184 |
|
|
return -1;
|
| 2185 |
|
|
}
|
| 2186 |
|
|
lbcount += *elen;
|
| 2187 |
|
|
} while (lbcount <= bcount);
|
| 2188 |
|
|
|
| 2189 |
|
|
*offset = bcount + *elen - lbcount;
|
| 2190 |
|
|
|
| 2191 |
|
|
return etype;
|
| 2192 |
|
|
}
|
| 2193 |
|
|
|
| 2194 |
|
|
long udf_block_map(struct inode *inode, long block)
|
| 2195 |
|
|
{
|
| 2196 |
|
|
lb_addr eloc, bloc;
|
| 2197 |
|
|
uint32_t offset, extoffset, elen;
|
| 2198 |
|
|
struct buffer_head *bh = NULL;
|
| 2199 |
|
|
int ret;
|
| 2200 |
|
|
|
| 2201 |
|
|
lock_kernel();
|
| 2202 |
|
|
|
| 2203 |
|
|
if (inode_bmap(inode, block, &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
|
| 2204 |
|
|
ret = udf_get_lb_pblock(inode->i_sb, eloc, offset >> inode->i_sb->s_blocksize_bits);
|
| 2205 |
|
|
else
|
| 2206 |
|
|
ret = 0;
|
| 2207 |
|
|
|
| 2208 |
|
|
unlock_kernel();
|
| 2209 |
|
|
|
| 2210 |
|
|
if (bh)
|
| 2211 |
|
|
udf_release_data(bh);
|
| 2212 |
|
|
|
| 2213 |
|
|
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
|
| 2214 |
|
|
return udf_fixed_to_variable(ret);
|
| 2215 |
|
|
else
|
| 2216 |
|
|
return ret;
|
| 2217 |
|
|
}
|
