Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ialloc.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode allocation handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
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/quotaops.h> | |
24 | #include <linux/udf_fs.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/slab.h> | |
27 | ||
28 | #include "udf_i.h" | |
29 | #include "udf_sb.h" | |
30 | ||
31 | void udf_free_inode(struct inode * inode) | |
32 | { | |
33 | struct super_block *sb = inode->i_sb; | |
34 | struct udf_sb_info *sbi = UDF_SB(sb); | |
35 | ||
36 | /* | |
37 | * Note: we must free any quota before locking the superblock, | |
38 | * as writing the quota to disk may need the lock as well. | |
39 | */ | |
40 | DQUOT_FREE_INODE(inode); | |
41 | DQUOT_DROP(inode); | |
42 | ||
43 | clear_inode(inode); | |
44 | ||
45 | down(&sbi->s_alloc_sem); | |
46 | if (sbi->s_lvidbh) { | |
47 | if (S_ISDIR(inode->i_mode)) | |
48 | UDF_SB_LVIDIU(sb)->numDirs = | |
49 | cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) - 1); | |
50 | else | |
51 | UDF_SB_LVIDIU(sb)->numFiles = | |
52 | cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) - 1); | |
53 | ||
54 | mark_buffer_dirty(sbi->s_lvidbh); | |
55 | } | |
56 | up(&sbi->s_alloc_sem); | |
57 | ||
58 | udf_free_blocks(sb, NULL, UDF_I_LOCATION(inode), 0, 1); | |
59 | } | |
60 | ||
61 | struct inode * udf_new_inode (struct inode *dir, int mode, int * err) | |
62 | { | |
63 | struct super_block *sb = dir->i_sb; | |
64 | struct udf_sb_info *sbi = UDF_SB(sb); | |
65 | struct inode * inode; | |
66 | int block; | |
67 | uint32_t start = UDF_I_LOCATION(dir).logicalBlockNum; | |
68 | ||
69 | inode = new_inode(sb); | |
70 | ||
71 | if (!inode) | |
72 | { | |
73 | *err = -ENOMEM; | |
74 | return NULL; | |
75 | } | |
76 | *err = -ENOSPC; | |
77 | ||
78 | block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum, | |
79 | start, err); | |
80 | if (*err) | |
81 | { | |
82 | iput(inode); | |
83 | return NULL; | |
84 | } | |
85 | ||
86 | down(&sbi->s_alloc_sem); | |
87 | UDF_I_UNIQUE(inode) = 0; | |
88 | UDF_I_LENEXTENTS(inode) = 0; | |
89 | UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; | |
90 | UDF_I_NEXT_ALLOC_GOAL(inode) = 0; | |
91 | UDF_I_STRAT4096(inode) = 0; | |
92 | if (UDF_SB_LVIDBH(sb)) | |
93 | { | |
94 | struct logicalVolHeaderDesc *lvhd; | |
95 | uint64_t uniqueID; | |
96 | lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse); | |
97 | if (S_ISDIR(mode)) | |
98 | UDF_SB_LVIDIU(sb)->numDirs = | |
99 | cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1); | |
100 | else | |
101 | UDF_SB_LVIDIU(sb)->numFiles = | |
102 | cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1); | |
103 | UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
104 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) | |
105 | uniqueID += 16; | |
106 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
107 | mark_buffer_dirty(UDF_SB_LVIDBH(sb)); | |
108 | } | |
109 | inode->i_mode = mode; | |
110 | inode->i_uid = current->fsuid; | |
111 | if (dir->i_mode & S_ISGID) | |
112 | { | |
113 | inode->i_gid = dir->i_gid; | |
114 | if (S_ISDIR(mode)) | |
115 | mode |= S_ISGID; | |
116 | } | |
117 | else | |
118 | inode->i_gid = current->fsgid; | |
119 | ||
120 | UDF_I_LOCATION(inode).logicalBlockNum = block; | |
121 | UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; | |
122 | inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0); | |
123 | inode->i_blksize = PAGE_SIZE; | |
124 | inode->i_blocks = 0; | |
125 | UDF_I_LENEATTR(inode) = 0; | |
126 | UDF_I_LENALLOC(inode) = 0; | |
127 | UDF_I_USE(inode) = 0; | |
128 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) | |
129 | { | |
130 | UDF_I_EFE(inode) = 1; | |
131 | UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE); | |
132 | UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); | |
133 | memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); | |
134 | } | |
135 | else | |
136 | { | |
137 | UDF_I_EFE(inode) = 0; | |
138 | UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); | |
139 | memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct fileEntry)); | |
140 | } | |
141 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) | |
142 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; | |
143 | else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
144 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; | |
145 | else | |
146 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; | |
147 | inode->i_mtime = inode->i_atime = inode->i_ctime = | |
148 | UDF_I_CRTIME(inode) = current_fs_time(inode->i_sb); | |
149 | insert_inode_hash(inode); | |
150 | mark_inode_dirty(inode); | |
151 | up(&sbi->s_alloc_sem); | |
152 | ||
153 | if (DQUOT_ALLOC_INODE(inode)) | |
154 | { | |
155 | DQUOT_DROP(inode); | |
156 | inode->i_flags |= S_NOQUOTA; | |
157 | inode->i_nlink = 0; | |
158 | iput(inode); | |
159 | *err = -EDQUOT; | |
160 | return NULL; | |
161 | } | |
162 | ||
163 | *err = 0; | |
164 | return inode; | |
165 | } |