4 * Copyright (C) 1997, Stephen Tweedie
6 * Provide stub functions for unreadable inodes
8 * Fabian Frederick : August 2003 - All file operations assigned to EIO
12 #include <linux/export.h>
13 #include <linux/stat.h>
14 #include <linux/time.h>
15 #include <linux/namei.h>
16 #include <linux/poll.h>
18 static int bad_file_open(struct inode *inode, struct file *filp)
23 static const struct file_operations bad_file_ops =
25 .open = bad_file_open,
28 static int bad_inode_create (struct inode *dir, struct dentry *dentry,
29 umode_t mode, bool excl)
34 static struct dentry *bad_inode_lookup(struct inode *dir,
35 struct dentry *dentry, unsigned int flags)
40 static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
41 struct dentry *dentry)
46 static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
51 static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
57 static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
63 static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
68 static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
69 umode_t mode, dev_t rdev)
74 static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
75 struct inode *new_dir, struct dentry *new_dentry,
81 static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
87 static int bad_inode_permission(struct inode *inode, int mask)
92 static int bad_inode_getattr(const struct path *path, struct kstat *stat,
93 u32 request_mask, unsigned int query_flags)
98 static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
103 static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
109 static const char *bad_inode_get_link(struct dentry *dentry,
111 struct delayed_call *done)
113 return ERR_PTR(-EIO);
116 static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type)
118 return ERR_PTR(-EIO);
121 static int bad_inode_fiemap(struct inode *inode,
122 struct fiemap_extent_info *fieinfo, u64 start,
128 static int bad_inode_update_time(struct inode *inode, struct timespec *time,
134 static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
135 struct file *file, unsigned int open_flag,
136 umode_t create_mode, int *opened)
141 static int bad_inode_tmpfile(struct inode *inode, struct dentry *dentry,
147 static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl,
153 static const struct inode_operations bad_inode_ops =
155 .create = bad_inode_create,
156 .lookup = bad_inode_lookup,
157 .link = bad_inode_link,
158 .unlink = bad_inode_unlink,
159 .symlink = bad_inode_symlink,
160 .mkdir = bad_inode_mkdir,
161 .rmdir = bad_inode_rmdir,
162 .mknod = bad_inode_mknod,
163 .rename = bad_inode_rename2,
164 .readlink = bad_inode_readlink,
165 .permission = bad_inode_permission,
166 .getattr = bad_inode_getattr,
167 .setattr = bad_inode_setattr,
168 .listxattr = bad_inode_listxattr,
169 .get_link = bad_inode_get_link,
170 .get_acl = bad_inode_get_acl,
171 .fiemap = bad_inode_fiemap,
172 .update_time = bad_inode_update_time,
173 .atomic_open = bad_inode_atomic_open,
174 .tmpfile = bad_inode_tmpfile,
175 .set_acl = bad_inode_set_acl,
180 * When a filesystem is unable to read an inode due to an I/O error in
181 * its read_inode() function, it can call make_bad_inode() to return a
182 * set of stubs which will return EIO errors as required.
184 * We only need to do limited initialisation: all other fields are
185 * preinitialised to zero automatically.
189 * make_bad_inode - mark an inode bad due to an I/O error
190 * @inode: Inode to mark bad
192 * When an inode cannot be read due to a media or remote network
193 * failure this function makes the inode "bad" and causes I/O operations
194 * on it to fail from this point on.
197 void make_bad_inode(struct inode *inode)
199 remove_inode_hash(inode);
201 inode->i_mode = S_IFREG;
202 inode->i_atime = inode->i_mtime = inode->i_ctime =
204 inode->i_op = &bad_inode_ops;
205 inode->i_opflags &= ~IOP_XATTR;
206 inode->i_fop = &bad_file_ops;
208 EXPORT_SYMBOL(make_bad_inode);
211 * This tests whether an inode has been flagged as bad. The test uses
212 * &bad_inode_ops to cover the case of invalidated inodes as well as
213 * those created by make_bad_inode() above.
217 * is_bad_inode - is an inode errored
218 * @inode: inode to test
220 * Returns true if the inode in question has been marked as bad.
223 bool is_bad_inode(struct inode *inode)
225 return (inode->i_op == &bad_inode_ops);
228 EXPORT_SYMBOL(is_bad_inode);
231 * iget_failed - Mark an under-construction inode as dead and release it
232 * @inode: The inode to discard
234 * Mark an under-construction inode as dead and release it.
236 void iget_failed(struct inode *inode)
238 make_bad_inode(inode);
239 unlock_new_inode(inode);
242 EXPORT_SYMBOL(iget_failed);