Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
ialloc.c
Go to the documentation of this file.
1 /*
2  * ialloc.c
3  *
4  * PURPOSE
5  * Inode allocation handling routines for the OSTA-UDF(tm) filesystem.
6  *
7  * COPYRIGHT
8  * This file is distributed under the terms of the GNU General Public
9  * License (GPL). Copies of the GPL can be obtained from:
10  * ftp://prep.ai.mit.edu/pub/gnu/GPL
11  * Each contributing author retains all rights to their own work.
12  *
13  * (C) 1998-2001 Ben Fennema
14  *
15  * HISTORY
16  *
17  * 02/24/99 blf Created.
18  *
19  */
20 
21 #include "udfdecl.h"
22 #include <linux/fs.h>
23 #include <linux/sched.h>
24 #include <linux/slab.h>
25 
26 #include "udf_i.h"
27 #include "udf_sb.h"
28 
29 void udf_free_inode(struct inode *inode)
30 {
31  struct super_block *sb = inode->i_sb;
32  struct udf_sb_info *sbi = UDF_SB(sb);
33 
34  mutex_lock(&sbi->s_alloc_mutex);
35  if (sbi->s_lvid_bh) {
36  struct logicalVolIntegrityDescImpUse *lvidiu =
37  udf_sb_lvidiu(sbi);
38  if (S_ISDIR(inode->i_mode))
39  le32_add_cpu(&lvidiu->numDirs, -1);
40  else
41  le32_add_cpu(&lvidiu->numFiles, -1);
42  udf_updated_lvid(sb);
43  }
44  mutex_unlock(&sbi->s_alloc_mutex);
45 
46  udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
47 }
48 
49 struct inode *udf_new_inode(struct inode *dir, umode_t mode, int *err)
50 {
51  struct super_block *sb = dir->i_sb;
52  struct udf_sb_info *sbi = UDF_SB(sb);
53  struct inode *inode;
54  int block;
55  uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
56  struct udf_inode_info *iinfo;
57  struct udf_inode_info *dinfo = UDF_I(dir);
58 
59  inode = new_inode(sb);
60 
61  if (!inode) {
62  *err = -ENOMEM;
63  return NULL;
64  }
65  *err = -ENOSPC;
66 
67  iinfo = UDF_I(inode);
68  if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
69  iinfo->i_efe = 1;
70  if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
71  sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
72  iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
73  sizeof(struct extendedFileEntry),
74  GFP_KERNEL);
75  } else {
76  iinfo->i_efe = 0;
77  iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
78  sizeof(struct fileEntry),
79  GFP_KERNEL);
80  }
81  if (!iinfo->i_ext.i_data) {
82  iput(inode);
83  *err = -ENOMEM;
84  return NULL;
85  }
86 
87  block = udf_new_block(dir->i_sb, NULL,
88  dinfo->i_location.partitionReferenceNum,
89  start, err);
90  if (*err) {
91  iput(inode);
92  return NULL;
93  }
94 
95  if (sbi->s_lvid_bh) {
96  struct logicalVolIntegrityDescImpUse *lvidiu;
97 
98  iinfo->i_unique = lvid_get_unique_id(sb);
99  mutex_lock(&sbi->s_alloc_mutex);
100  lvidiu = udf_sb_lvidiu(sbi);
101  if (S_ISDIR(mode))
102  le32_add_cpu(&lvidiu->numDirs, 1);
103  else
104  le32_add_cpu(&lvidiu->numFiles, 1);
105  udf_updated_lvid(sb);
106  mutex_unlock(&sbi->s_alloc_mutex);
107  }
108 
109  inode_init_owner(inode, dir, mode);
110 
111  iinfo->i_location.logicalBlockNum = block;
112  iinfo->i_location.partitionReferenceNum =
113  dinfo->i_location.partitionReferenceNum;
114  inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
115  inode->i_blocks = 0;
116  iinfo->i_lenEAttr = 0;
117  iinfo->i_lenAlloc = 0;
118  iinfo->i_use = 0;
119  iinfo->i_checkpoint = 1;
120  if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
121  iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
122  else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
123  iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
124  else
125  iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
126  inode->i_mtime = inode->i_atime = inode->i_ctime =
127  iinfo->i_crtime = current_fs_time(inode->i_sb);
128  insert_inode_hash(inode);
129  mark_inode_dirty(inode);
130 
131  *err = 0;
132  return inode;
133 }
Generated on Thu Jan 10 2013 14:46:46 for Linux Kernel by   doxygen 1.8.2