2 * linux/fs/hfsplus/dir.c
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 * Handling of directories
11 #include <linux/errno.h>
13 #include <linux/slab.h>
14 #include <linux/random.h>
16 #include "hfsplus_fs.h"
17 #include "hfsplus_raw.h"
19 static inline void hfsplus_instantiate(struct dentry *dentry,
20 struct inode *inode, u32 cnid)
22 dentry->d_fsdata = (void *)(unsigned long)cnid;
23 d_instantiate(dentry, inode);
26 /* Find the entry inside dir named dentry->d_name */
27 static struct dentry *hfsplus_lookup(struct inode *dir, struct dentry *dentry,
30 struct inode *inode = NULL;
31 struct hfs_find_data fd;
32 struct super_block *sb;
33 hfsplus_cat_entry entry;
40 dentry->d_op = &hfsplus_dentry_operations;
41 dentry->d_fsdata = NULL;
42 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
43 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, &dentry->d_name);
45 err = hfs_brec_read(&fd, &entry, sizeof(entry));
55 type = be16_to_cpu(entry.type);
56 if (type == HFSPLUS_FOLDER) {
57 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
61 cnid = be32_to_cpu(entry.folder.id);
62 dentry->d_fsdata = (void *)(unsigned long)cnid;
63 } else if (type == HFSPLUS_FILE) {
64 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
68 cnid = be32_to_cpu(entry.file.id);
69 if (entry.file.user_info.fdType == cpu_to_be32(HFSP_HARDLINK_TYPE) &&
70 entry.file.user_info.fdCreator == cpu_to_be32(HFSP_HFSPLUS_CREATOR) &&
71 (entry.file.create_date == HFSPLUS_I(HFSPLUS_SB(sb)->hidden_dir)->create_date ||
72 entry.file.create_date == HFSPLUS_I(sb->s_root->d_inode)->create_date) &&
73 HFSPLUS_SB(sb)->hidden_dir) {
77 if (dentry->d_fsdata) {
79 * We found a link pointing to another link,
80 * so ignore it and treat it as regular file.
82 cnid = (unsigned long)dentry->d_fsdata;
85 dentry->d_fsdata = (void *)(unsigned long)cnid;
86 linkid = be32_to_cpu(entry.file.permissions.dev);
87 str.len = sprintf(name, "iNode%d", linkid);
89 hfsplus_cat_build_key(sb, fd.search_key,
90 HFSPLUS_SB(sb)->hidden_dir->i_ino, &str);
93 } else if (!dentry->d_fsdata)
94 dentry->d_fsdata = (void *)(unsigned long)cnid;
96 printk(KERN_ERR "hfs: invalid catalog entry type in lookup\n");
101 inode = hfsplus_iget(dir->i_sb, cnid);
103 return ERR_CAST(inode);
104 if (S_ISREG(inode->i_mode))
105 HFSPLUS_I(inode)->dev = linkid;
107 d_add(dentry, inode);
114 static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir)
116 struct inode *inode = filp->f_path.dentry->d_inode;
117 struct super_block *sb = inode->i_sb;
119 char strbuf[HFSPLUS_MAX_STRLEN + 1];
120 hfsplus_cat_entry entry;
121 struct hfs_find_data fd;
122 struct hfsplus_readdir_data *rd;
125 if (filp->f_pos >= inode->i_size)
128 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
129 hfsplus_cat_build_key(sb, fd.search_key, inode->i_ino, NULL);
130 err = hfs_brec_find(&fd);
134 switch ((u32)filp->f_pos) {
136 /* This is completely artificial... */
137 if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR))
142 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength);
143 if (be16_to_cpu(entry.type) != HFSPLUS_FOLDER_THREAD) {
144 printk(KERN_ERR "hfs: bad catalog folder thread\n");
148 if (fd.entrylength < HFSPLUS_MIN_THREAD_SZ) {
149 printk(KERN_ERR "hfs: truncated catalog thread\n");
153 if (filldir(dirent, "..", 2, 1,
154 be32_to_cpu(entry.thread.parentID), DT_DIR))
159 if (filp->f_pos >= inode->i_size)
161 err = hfs_brec_goto(&fd, filp->f_pos - 1);
167 if (be32_to_cpu(fd.key->cat.parent) != inode->i_ino) {
168 printk(KERN_ERR "hfs: walked past end of dir\n");
172 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength);
173 type = be16_to_cpu(entry.type);
174 len = HFSPLUS_MAX_STRLEN;
175 err = hfsplus_uni2asc(sb, &fd.key->cat.name, strbuf, &len);
178 if (type == HFSPLUS_FOLDER) {
179 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
180 printk(KERN_ERR "hfs: small dir entry\n");
184 if (HFSPLUS_SB(sb)->hidden_dir &&
185 HFSPLUS_SB(sb)->hidden_dir->i_ino ==
186 be32_to_cpu(entry.folder.id))
188 if (filldir(dirent, strbuf, len, filp->f_pos,
189 be32_to_cpu(entry.folder.id), DT_DIR))
191 } else if (type == HFSPLUS_FILE) {
192 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
193 printk(KERN_ERR "hfs: small file entry\n");
197 if (filldir(dirent, strbuf, len, filp->f_pos,
198 be32_to_cpu(entry.file.id), DT_REG))
201 printk(KERN_ERR "hfs: bad catalog entry type\n");
207 if (filp->f_pos >= inode->i_size)
209 err = hfs_brec_goto(&fd, 1);
213 rd = filp->private_data;
215 rd = kmalloc(sizeof(struct hfsplus_readdir_data), GFP_KERNEL);
220 filp->private_data = rd;
222 list_add(&rd->list, &HFSPLUS_I(inode)->open_dir_list);
224 memcpy(&rd->key, fd.key, sizeof(struct hfsplus_cat_key));
230 static int hfsplus_dir_release(struct inode *inode, struct file *file)
232 struct hfsplus_readdir_data *rd = file->private_data;
240 static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir,
241 struct dentry *dst_dentry)
243 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dst_dir->i_sb);
244 struct inode *inode = src_dentry->d_inode;
245 struct inode *src_dir = src_dentry->d_parent->d_inode;
251 if (HFSPLUS_IS_RSRC(inode))
254 if (inode->i_ino == (u32)(unsigned long)src_dentry->d_fsdata) {
256 get_random_bytes(&id, sizeof(cnid));
259 str.len = sprintf(name, "iNode%d", id);
260 res = hfsplus_rename_cat(inode->i_ino,
261 src_dir, &src_dentry->d_name,
262 sbi->hidden_dir, &str);
268 HFSPLUS_I(inode)->dev = id;
269 cnid = sbi->next_cnid++;
270 src_dentry->d_fsdata = (void *)(unsigned long)cnid;
271 res = hfsplus_create_cat(cnid, src_dir, &src_dentry->d_name, inode);
277 cnid = sbi->next_cnid++;
278 res = hfsplus_create_cat(cnid, dst_dir, &dst_dentry->d_name, inode);
283 hfsplus_instantiate(dst_dentry, inode, cnid);
284 atomic_inc(&inode->i_count);
285 inode->i_ctime = CURRENT_TIME_SEC;
286 mark_inode_dirty(inode);
288 dst_dir->i_sb->s_dirt = 1;
293 static int hfsplus_unlink(struct inode *dir, struct dentry *dentry)
295 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
296 struct inode *inode = dentry->d_inode;
302 if (HFSPLUS_IS_RSRC(inode))
305 cnid = (u32)(unsigned long)dentry->d_fsdata;
306 if (inode->i_ino == cnid &&
307 atomic_read(&HFSPLUS_I(inode)->opencnt)) {
309 str.len = sprintf(name, "temp%lu", inode->i_ino);
310 res = hfsplus_rename_cat(inode->i_ino,
311 dir, &dentry->d_name,
312 sbi->hidden_dir, &str);
314 inode->i_flags |= S_DEAD;
317 res = hfsplus_delete_cat(cnid, dir, &dentry->d_name);
321 if (inode->i_nlink > 0)
323 if (inode->i_ino == cnid)
325 if (!inode->i_nlink) {
326 if (inode->i_ino != cnid) {
328 if (!atomic_read(&HFSPLUS_I(inode)->opencnt)) {
329 res = hfsplus_delete_cat(inode->i_ino,
333 hfsplus_delete_inode(inode);
335 inode->i_flags |= S_DEAD;
337 hfsplus_delete_inode(inode);
340 inode->i_ctime = CURRENT_TIME_SEC;
341 mark_inode_dirty(inode);
346 static int hfsplus_rmdir(struct inode *dir, struct dentry *dentry)
351 inode = dentry->d_inode;
352 if (inode->i_size != 2)
354 res = hfsplus_delete_cat(inode->i_ino, dir, &dentry->d_name);
358 inode->i_ctime = CURRENT_TIME_SEC;
359 hfsplus_delete_inode(inode);
360 mark_inode_dirty(inode);
364 static int hfsplus_symlink(struct inode *dir, struct dentry *dentry,
370 inode = hfsplus_new_inode(dir->i_sb, S_IFLNK | S_IRWXUGO);
374 res = page_symlink(inode, symname, strlen(symname) + 1);
378 res = hfsplus_create_cat(inode->i_ino, dir, &dentry->d_name, inode);
382 hfsplus_instantiate(dentry, inode, inode->i_ino);
383 mark_inode_dirty(inode);
388 hfsplus_delete_inode(inode);
393 static int hfsplus_mknod(struct inode *dir, struct dentry *dentry,
394 int mode, dev_t rdev)
399 inode = hfsplus_new_inode(dir->i_sb, mode);
403 res = hfsplus_create_cat(inode->i_ino, dir, &dentry->d_name, inode);
406 hfsplus_delete_inode(inode);
411 if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode))
412 init_special_inode(inode, mode, rdev);
414 hfsplus_instantiate(dentry, inode, inode->i_ino);
415 mark_inode_dirty(inode);
419 static int hfsplus_create(struct inode *dir, struct dentry *dentry, int mode,
420 struct nameidata *nd)
422 return hfsplus_mknod(dir, dentry, mode, 0);
425 static int hfsplus_mkdir(struct inode *dir, struct dentry *dentry, int mode)
427 return hfsplus_mknod(dir, dentry, mode | S_IFDIR, 0);
430 static int hfsplus_rename(struct inode *old_dir, struct dentry *old_dentry,
431 struct inode *new_dir, struct dentry *new_dentry)
435 /* Unlink destination if it already exists */
436 if (new_dentry->d_inode) {
437 res = hfsplus_unlink(new_dir, new_dentry);
442 res = hfsplus_rename_cat((u32)(unsigned long)old_dentry->d_fsdata,
443 old_dir, &old_dentry->d_name,
444 new_dir, &new_dentry->d_name);
446 new_dentry->d_fsdata = old_dentry->d_fsdata;
450 const struct inode_operations hfsplus_dir_inode_operations = {
451 .lookup = hfsplus_lookup,
452 .create = hfsplus_create,
453 .link = hfsplus_link,
454 .unlink = hfsplus_unlink,
455 .mkdir = hfsplus_mkdir,
456 .rmdir = hfsplus_rmdir,
457 .symlink = hfsplus_symlink,
458 .mknod = hfsplus_mknod,
459 .rename = hfsplus_rename,
462 const struct file_operations hfsplus_dir_operations = {
463 .read = generic_read_dir,
464 .readdir = hfsplus_readdir,
465 .unlocked_ioctl = hfsplus_ioctl,
466 .llseek = generic_file_llseek,
467 .release = hfsplus_dir_release,