1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* 2 /*
3 * linux/fs/bad_inode.c 3 * linux/fs/bad_inode.c
4 * 4 *
5 * Copyright (C) 1997, Stephen Tweedie 5 * Copyright (C) 1997, Stephen Tweedie
6 * 6 *
7 * Provide stub functions for unreadable inod 7 * Provide stub functions for unreadable inodes
8 * 8 *
9 * Fabian Frederick : August 2003 - All file 9 * Fabian Frederick : August 2003 - All file operations assigned to EIO
10 */ 10 */
11 11
12 #include <linux/fs.h> 12 #include <linux/fs.h>
13 #include <linux/export.h> 13 #include <linux/export.h>
14 #include <linux/stat.h> 14 #include <linux/stat.h>
15 #include <linux/time.h> 15 #include <linux/time.h>
16 #include <linux/namei.h> 16 #include <linux/namei.h>
17 #include <linux/poll.h> 17 #include <linux/poll.h>
18 #include <linux/fiemap.h> <<
19 18
20 static int bad_file_open(struct inode *inode, 19 static int bad_file_open(struct inode *inode, struct file *filp)
21 { 20 {
22 return -EIO; 21 return -EIO;
23 } 22 }
24 23
25 static const struct file_operations bad_file_o 24 static const struct file_operations bad_file_ops =
26 { 25 {
27 .open = bad_file_open, 26 .open = bad_file_open,
28 }; 27 };
29 28
30 static int bad_inode_create(struct mnt_idmap * !! 29 static int bad_inode_create (struct inode *dir, struct dentry *dentry,
31 struct inode *dir, !! 30 umode_t mode, bool excl)
32 umode_t mode, bool <<
33 { 31 {
34 return -EIO; 32 return -EIO;
35 } 33 }
36 34
37 static struct dentry *bad_inode_lookup(struct 35 static struct dentry *bad_inode_lookup(struct inode *dir,
38 struct dentry *dentry, 36 struct dentry *dentry, unsigned int flags)
39 { 37 {
40 return ERR_PTR(-EIO); 38 return ERR_PTR(-EIO);
41 } 39 }
42 40
43 static int bad_inode_link (struct dentry *old_ 41 static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
44 struct dentry *dentry) 42 struct dentry *dentry)
45 { 43 {
46 return -EIO; 44 return -EIO;
47 } 45 }
48 46
49 static int bad_inode_unlink(struct inode *dir, 47 static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
50 { 48 {
51 return -EIO; 49 return -EIO;
52 } 50 }
53 51
54 static int bad_inode_symlink(struct mnt_idmap !! 52 static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
55 struct inode *dir !! 53 const char *symname)
56 const char *symna <<
57 { 54 {
58 return -EIO; 55 return -EIO;
59 } 56 }
60 57
61 static int bad_inode_mkdir(struct mnt_idmap *i !! 58 static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
62 struct dentry *dent !! 59 umode_t mode)
63 { 60 {
64 return -EIO; 61 return -EIO;
65 } 62 }
66 63
67 static int bad_inode_rmdir (struct inode *dir, 64 static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
68 { 65 {
69 return -EIO; 66 return -EIO;
70 } 67 }
71 68
72 static int bad_inode_mknod(struct mnt_idmap *i !! 69 static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
73 struct dentry *dent !! 70 umode_t mode, dev_t rdev)
74 { 71 {
75 return -EIO; 72 return -EIO;
76 } 73 }
77 74
78 static int bad_inode_rename2(struct mnt_idmap !! 75 static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
79 struct inode *old <<
80 struct inode *new 76 struct inode *new_dir, struct dentry *new_dentry,
81 unsigned int flag 77 unsigned int flags)
82 { 78 {
83 return -EIO; 79 return -EIO;
84 } 80 }
85 81
86 static int bad_inode_readlink(struct dentry *d 82 static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
87 int buflen) 83 int buflen)
88 { 84 {
89 return -EIO; 85 return -EIO;
90 } 86 }
91 87
92 static int bad_inode_permission(struct mnt_idm !! 88 static int bad_inode_permission(struct inode *inode, int mask)
93 struct inode * <<
94 { 89 {
95 return -EIO; 90 return -EIO;
96 } 91 }
97 92
98 static int bad_inode_getattr(struct mnt_idmap !! 93 static int bad_inode_getattr(const struct path *path, struct kstat *stat,
99 const struct path <<
100 u32 request_mask, 94 u32 request_mask, unsigned int query_flags)
101 { 95 {
102 return -EIO; 96 return -EIO;
103 } 97 }
104 98
105 static int bad_inode_setattr(struct mnt_idmap !! 99 static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
106 struct dentry *di <<
107 { 100 {
108 return -EIO; 101 return -EIO;
109 } 102 }
110 103
111 static ssize_t bad_inode_listxattr(struct dent 104 static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
112 size_t buffer_size) 105 size_t buffer_size)
113 { 106 {
114 return -EIO; 107 return -EIO;
115 } 108 }
116 109
117 static const char *bad_inode_get_link(struct d 110 static const char *bad_inode_get_link(struct dentry *dentry,
118 struct i 111 struct inode *inode,
119 struct d 112 struct delayed_call *done)
120 { 113 {
121 return ERR_PTR(-EIO); 114 return ERR_PTR(-EIO);
122 } 115 }
123 116
124 static struct posix_acl *bad_inode_get_acl(str !! 117 static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type)
125 { 118 {
126 return ERR_PTR(-EIO); 119 return ERR_PTR(-EIO);
127 } 120 }
128 121
129 static int bad_inode_fiemap(struct inode *inod 122 static int bad_inode_fiemap(struct inode *inode,
130 struct fiemap_exte 123 struct fiemap_extent_info *fieinfo, u64 start,
131 u64 len) 124 u64 len)
132 { 125 {
133 return -EIO; 126 return -EIO;
134 } 127 }
135 128
136 static int bad_inode_update_time(struct inode !! 129 static int bad_inode_update_time(struct inode *inode, struct timespec *time,
>> 130 int flags)
137 { 131 {
138 return -EIO; 132 return -EIO;
139 } 133 }
140 134
141 static int bad_inode_atomic_open(struct inode 135 static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
142 struct file * 136 struct file *file, unsigned int open_flag,
143 umode_t creat !! 137 umode_t create_mode, int *opened)
144 { 138 {
145 return -EIO; 139 return -EIO;
146 } 140 }
147 141
148 static int bad_inode_tmpfile(struct mnt_idmap !! 142 static int bad_inode_tmpfile(struct inode *inode, struct dentry *dentry,
149 struct inode *ino <<
150 umode_t mode) 143 umode_t mode)
151 { 144 {
152 return -EIO; 145 return -EIO;
153 } 146 }
154 147
155 static int bad_inode_set_acl(struct mnt_idmap !! 148 static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl,
156 struct dentry *de <<
157 int type) 149 int type)
158 { 150 {
159 return -EIO; 151 return -EIO;
160 } 152 }
161 153
162 static const struct inode_operations bad_inode 154 static const struct inode_operations bad_inode_ops =
163 { 155 {
164 .create = bad_inode_create, 156 .create = bad_inode_create,
165 .lookup = bad_inode_lookup, 157 .lookup = bad_inode_lookup,
166 .link = bad_inode_link, 158 .link = bad_inode_link,
167 .unlink = bad_inode_unlink, 159 .unlink = bad_inode_unlink,
168 .symlink = bad_inode_symlink, 160 .symlink = bad_inode_symlink,
169 .mkdir = bad_inode_mkdir, 161 .mkdir = bad_inode_mkdir,
170 .rmdir = bad_inode_rmdir, 162 .rmdir = bad_inode_rmdir,
171 .mknod = bad_inode_mknod, 163 .mknod = bad_inode_mknod,
172 .rename = bad_inode_rename2, 164 .rename = bad_inode_rename2,
173 .readlink = bad_inode_readlink, 165 .readlink = bad_inode_readlink,
174 .permission = bad_inode_permission 166 .permission = bad_inode_permission,
175 .getattr = bad_inode_getattr, 167 .getattr = bad_inode_getattr,
176 .setattr = bad_inode_setattr, 168 .setattr = bad_inode_setattr,
177 .listxattr = bad_inode_listxattr, 169 .listxattr = bad_inode_listxattr,
178 .get_link = bad_inode_get_link, 170 .get_link = bad_inode_get_link,
179 .get_inode_acl = bad_inode_get_acl, !! 171 .get_acl = bad_inode_get_acl,
180 .fiemap = bad_inode_fiemap, 172 .fiemap = bad_inode_fiemap,
181 .update_time = bad_inode_update_tim 173 .update_time = bad_inode_update_time,
182 .atomic_open = bad_inode_atomic_ope 174 .atomic_open = bad_inode_atomic_open,
183 .tmpfile = bad_inode_tmpfile, 175 .tmpfile = bad_inode_tmpfile,
184 .set_acl = bad_inode_set_acl, 176 .set_acl = bad_inode_set_acl,
185 }; 177 };
186 178
187 179
188 /* 180 /*
189 * When a filesystem is unable to read an inod 181 * When a filesystem is unable to read an inode due to an I/O error in
190 * its read_inode() function, it can call make 182 * its read_inode() function, it can call make_bad_inode() to return a
191 * set of stubs which will return EIO errors a 183 * set of stubs which will return EIO errors as required.
192 * 184 *
193 * We only need to do limited initialisation: 185 * We only need to do limited initialisation: all other fields are
194 * preinitialised to zero automatically. 186 * preinitialised to zero automatically.
195 */ 187 */
196 188
197 /** 189 /**
198 * make_bad_inode - mark an inode bad due 190 * make_bad_inode - mark an inode bad due to an I/O error
199 * @inode: Inode to mark bad 191 * @inode: Inode to mark bad
200 * 192 *
201 * When an inode cannot be read due to a 193 * When an inode cannot be read due to a media or remote network
202 * failure this function makes the inode 194 * failure this function makes the inode "bad" and causes I/O operations
203 * on it to fail from this point on. 195 * on it to fail from this point on.
204 */ 196 */
205 197
206 void make_bad_inode(struct inode *inode) 198 void make_bad_inode(struct inode *inode)
207 { 199 {
208 remove_inode_hash(inode); 200 remove_inode_hash(inode);
209 201
210 inode->i_mode = S_IFREG; 202 inode->i_mode = S_IFREG;
211 simple_inode_init_ts(inode); !! 203 inode->i_atime = inode->i_mtime = inode->i_ctime =
>> 204 current_time(inode);
212 inode->i_op = &bad_inode_ops; 205 inode->i_op = &bad_inode_ops;
213 inode->i_opflags &= ~IOP_XATTR; 206 inode->i_opflags &= ~IOP_XATTR;
214 inode->i_fop = &bad_file_ops; 207 inode->i_fop = &bad_file_ops;
215 } 208 }
216 EXPORT_SYMBOL(make_bad_inode); 209 EXPORT_SYMBOL(make_bad_inode);
217 210
218 /* 211 /*
219 * This tests whether an inode has been flagge 212 * This tests whether an inode has been flagged as bad. The test uses
220 * &bad_inode_ops to cover the case of invalid 213 * &bad_inode_ops to cover the case of invalidated inodes as well as
221 * those created by make_bad_inode() above. 214 * those created by make_bad_inode() above.
222 */ 215 */
223 216
224 /** 217 /**
225 * is_bad_inode - is an inode errored 218 * is_bad_inode - is an inode errored
226 * @inode: inode to test 219 * @inode: inode to test
227 * 220 *
228 * Returns true if the inode in question 221 * Returns true if the inode in question has been marked as bad.
229 */ 222 */
230 223
231 bool is_bad_inode(struct inode *inode) 224 bool is_bad_inode(struct inode *inode)
232 { 225 {
233 return (inode->i_op == &bad_inode_ops) 226 return (inode->i_op == &bad_inode_ops);
234 } 227 }
235 228
236 EXPORT_SYMBOL(is_bad_inode); 229 EXPORT_SYMBOL(is_bad_inode);
237 230
238 /** 231 /**
239 * iget_failed - Mark an under-construction in 232 * iget_failed - Mark an under-construction inode as dead and release it
240 * @inode: The inode to discard 233 * @inode: The inode to discard
241 * 234 *
242 * Mark an under-construction inode as dead an 235 * Mark an under-construction inode as dead and release it.
243 */ 236 */
244 void iget_failed(struct inode *inode) 237 void iget_failed(struct inode *inode)
245 { 238 {
246 make_bad_inode(inode); 239 make_bad_inode(inode);
247 unlock_new_inode(inode); 240 unlock_new_inode(inode);
248 iput(inode); 241 iput(inode);
249 } 242 }
250 EXPORT_SYMBOL(iget_failed); 243 EXPORT_SYMBOL(iget_failed);
251 244
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