blob: f0235c1640af7ec29edb92541f66dfc739c9b0db [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/hfsplus/dir.c
3 *
4 * Copyright (C) 2001
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
7 *
8 * Handling of directories
9 */
10
11#include <linux/errno.h>
12#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/slab.h>
14#include <linux/random.h>
Hin-Tak Leung017f8da2014-06-06 14:36:21 -070015#include <linux/nls.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17#include "hfsplus_fs.h"
18#include "hfsplus_raw.h"
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -080019#include "xattr.h"
Vyacheslav Dubeykob4c11072013-09-11 14:24:30 -070020#include "acl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
22static inline void hfsplus_instantiate(struct dentry *dentry,
23 struct inode *inode, u32 cnid)
24{
25 dentry->d_fsdata = (void *)(unsigned long)cnid;
26 d_instantiate(dentry, inode);
27}
28
29/* Find the entry inside dir named dentry->d_name */
30static struct dentry *hfsplus_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -040031 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -070032{
33 struct inode *inode = NULL;
34 struct hfs_find_data fd;
35 struct super_block *sb;
36 hfsplus_cat_entry entry;
37 int err;
38 u32 cnid, linkid = 0;
39 u16 type;
40
41 sb = dir->i_sb;
Duane Griffind45bce82007-07-15 23:41:23 -070042
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 dentry->d_fsdata = NULL;
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +040044 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
45 if (err)
46 return ERR_PTR(err);
Sougata Santra89ac9b42014-12-18 16:17:12 -080047 err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino,
48 &dentry->d_name);
49 if (unlikely(err < 0))
50 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051again:
52 err = hfs_brec_read(&fd, &entry, sizeof(entry));
53 if (err) {
54 if (err == -ENOENT) {
55 hfs_find_exit(&fd);
56 /* No such entry */
57 inode = NULL;
58 goto out;
59 }
60 goto fail;
61 }
62 type = be16_to_cpu(entry.type);
63 if (type == HFSPLUS_FOLDER) {
64 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
65 err = -EIO;
66 goto fail;
67 }
68 cnid = be32_to_cpu(entry.folder.id);
69 dentry->d_fsdata = (void *)(unsigned long)cnid;
70 } else if (type == HFSPLUS_FILE) {
71 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
72 err = -EIO;
73 goto fail;
74 }
75 cnid = be32_to_cpu(entry.file.id);
Anton Salikhmetov2753cc22010-12-16 18:08:38 +020076 if (entry.file.user_info.fdType ==
77 cpu_to_be32(HFSP_HARDLINK_TYPE) &&
78 entry.file.user_info.fdCreator ==
79 cpu_to_be32(HFSP_HFSPLUS_CREATOR) &&
80 (entry.file.create_date ==
81 HFSPLUS_I(HFSPLUS_SB(sb)->hidden_dir)->
82 create_date ||
83 entry.file.create_date ==
84 HFSPLUS_I(sb->s_root->d_inode)->
85 create_date) &&
86 HFSPLUS_SB(sb)->hidden_dir) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 struct qstr str;
88 char name[32];
89
90 if (dentry->d_fsdata) {
Roman Zippelaf8c85b2006-01-18 17:43:10 -080091 /*
92 * We found a link pointing to another link,
93 * so ignore it and treat it as regular file.
94 */
95 cnid = (unsigned long)dentry->d_fsdata;
96 linkid = 0;
97 } else {
98 dentry->d_fsdata = (void *)(unsigned long)cnid;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +020099 linkid =
100 be32_to_cpu(entry.file.permissions.dev);
Roman Zippelaf8c85b2006-01-18 17:43:10 -0800101 str.len = sprintf(name, "iNode%d", linkid);
102 str.name = name;
Sougata Santra89ac9b42014-12-18 16:17:12 -0800103 err = hfsplus_cat_build_key(sb, fd.search_key,
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200104 HFSPLUS_SB(sb)->hidden_dir->i_ino,
105 &str);
Sougata Santra89ac9b42014-12-18 16:17:12 -0800106 if (unlikely(err < 0))
107 goto fail;
Roman Zippelaf8c85b2006-01-18 17:43:10 -0800108 goto again;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 } else if (!dentry->d_fsdata)
111 dentry->d_fsdata = (void *)(unsigned long)cnid;
112 } else {
Joe Perchesd6142672013-04-30 15:27:55 -0700113 pr_err("invalid catalog entry type in lookup\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 err = -EIO;
115 goto fail;
116 }
117 hfs_find_exit(&fd);
David Howells63525392008-02-07 00:15:40 -0800118 inode = hfsplus_iget(dir->i_sb, cnid);
119 if (IS_ERR(inode))
120 return ERR_CAST(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 if (S_ISREG(inode->i_mode))
Christoph Hellwigf6089ff2010-10-14 09:54:28 -0400122 HFSPLUS_I(inode)->linkid = linkid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123out:
124 d_add(dentry, inode);
125 return NULL;
126fail:
127 hfs_find_exit(&fd);
128 return ERR_PTR(err);
129}
130
Al Viroe72514e2013-05-22 14:59:39 -0400131static int hfsplus_readdir(struct file *file, struct dir_context *ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132{
Al Viroe72514e2013-05-22 14:59:39 -0400133 struct inode *inode = file_inode(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 struct super_block *sb = inode->i_sb;
135 int len, err;
Hin-Tak Leung017f8da2014-06-06 14:36:21 -0700136 char *strbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 hfsplus_cat_entry entry;
138 struct hfs_find_data fd;
139 struct hfsplus_readdir_data *rd;
140 u16 type;
141
Al Viroe72514e2013-05-22 14:59:39 -0400142 if (file->f_pos >= inode->i_size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 return 0;
144
Alexey Khoroshilov5bd9d992011-07-06 02:29:59 +0400145 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
146 if (err)
147 return err;
Hin-Tak Leung017f8da2014-06-06 14:36:21 -0700148 strbuf = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_MAX_STRLEN + 1, GFP_KERNEL);
149 if (!strbuf) {
150 err = -ENOMEM;
151 goto out;
152 }
Sougata Santra89ac9b42014-12-18 16:17:12 -0800153 hfsplus_cat_build_key_with_cnid(sb, fd.search_key, inode->i_ino);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800154 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 if (err)
156 goto out;
157
Al Viroe72514e2013-05-22 14:59:39 -0400158 if (ctx->pos == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 /* This is completely artificial... */
Al Viroe72514e2013-05-22 14:59:39 -0400160 if (!dir_emit_dot(file, ctx))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 goto out;
Al Viroe72514e2013-05-22 14:59:39 -0400162 ctx->pos = 1;
163 }
164 if (ctx->pos == 1) {
Greg Kroah-Hartman6f24f892012-05-04 12:09:39 -0700165 if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) {
166 err = -EIO;
167 goto out;
168 }
169
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200170 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
171 fd.entrylength);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 if (be16_to_cpu(entry.type) != HFSPLUS_FOLDER_THREAD) {
Joe Perchesd6142672013-04-30 15:27:55 -0700173 pr_err("bad catalog folder thread\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 err = -EIO;
175 goto out;
176 }
177 if (fd.entrylength < HFSPLUS_MIN_THREAD_SZ) {
Joe Perchesd6142672013-04-30 15:27:55 -0700178 pr_err("truncated catalog thread\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 err = -EIO;
180 goto out;
181 }
Al Viroe72514e2013-05-22 14:59:39 -0400182 if (!dir_emit(ctx, "..", 2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 be32_to_cpu(entry.thread.parentID), DT_DIR))
184 goto out;
Al Viroe72514e2013-05-22 14:59:39 -0400185 ctx->pos = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
Al Viroe72514e2013-05-22 14:59:39 -0400187 if (ctx->pos >= inode->i_size)
188 goto out;
189 err = hfs_brec_goto(&fd, ctx->pos - 1);
190 if (err)
191 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 for (;;) {
193 if (be32_to_cpu(fd.key->cat.parent) != inode->i_ino) {
Joe Perchesd6142672013-04-30 15:27:55 -0700194 pr_err("walked past end of dir\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 err = -EIO;
196 goto out;
197 }
Greg Kroah-Hartman6f24f892012-05-04 12:09:39 -0700198
199 if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) {
200 err = -EIO;
201 goto out;
202 }
203
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200204 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
205 fd.entrylength);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 type = be16_to_cpu(entry.type);
Hin-Tak Leung017f8da2014-06-06 14:36:21 -0700207 len = NLS_MAX_CHARSET_SIZE * HFSPLUS_MAX_STRLEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 err = hfsplus_uni2asc(sb, &fd.key->cat.name, strbuf, &len);
209 if (err)
210 goto out;
211 if (type == HFSPLUS_FOLDER) {
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200212 if (fd.entrylength <
213 sizeof(struct hfsplus_cat_folder)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700214 pr_err("small dir entry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 err = -EIO;
216 goto out;
217 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200218 if (HFSPLUS_SB(sb)->hidden_dir &&
219 HFSPLUS_SB(sb)->hidden_dir->i_ino ==
220 be32_to_cpu(entry.folder.id))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 goto next;
Al Viroe72514e2013-05-22 14:59:39 -0400222 if (!dir_emit(ctx, strbuf, len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 be32_to_cpu(entry.folder.id), DT_DIR))
224 break;
225 } else if (type == HFSPLUS_FILE) {
Sergei Antonov97a62ea2014-06-06 14:36:24 -0700226 u16 mode;
227 unsigned type = DT_UNKNOWN;
228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
Joe Perchesd6142672013-04-30 15:27:55 -0700230 pr_err("small file entry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 err = -EIO;
232 goto out;
233 }
Sergei Antonov97a62ea2014-06-06 14:36:24 -0700234
235 mode = be16_to_cpu(entry.file.permissions.mode);
236 if (S_ISREG(mode))
237 type = DT_REG;
238 else if (S_ISLNK(mode))
239 type = DT_LNK;
240 else if (S_ISFIFO(mode))
241 type = DT_FIFO;
242 else if (S_ISCHR(mode))
243 type = DT_CHR;
244 else if (S_ISBLK(mode))
245 type = DT_BLK;
246 else if (S_ISSOCK(mode))
247 type = DT_SOCK;
248
Al Viroe72514e2013-05-22 14:59:39 -0400249 if (!dir_emit(ctx, strbuf, len,
Sergei Antonov97a62ea2014-06-06 14:36:24 -0700250 be32_to_cpu(entry.file.id), type))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 break;
252 } else {
Joe Perchesd6142672013-04-30 15:27:55 -0700253 pr_err("bad catalog entry type\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 err = -EIO;
255 goto out;
256 }
Anton Salikhmetov20b76432010-12-16 18:08:40 +0200257next:
Al Viroe72514e2013-05-22 14:59:39 -0400258 ctx->pos++;
259 if (ctx->pos >= inode->i_size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 goto out;
261 err = hfs_brec_goto(&fd, 1);
262 if (err)
263 goto out;
264 }
Al Viroe72514e2013-05-22 14:59:39 -0400265 rd = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 if (!rd) {
267 rd = kmalloc(sizeof(struct hfsplus_readdir_data), GFP_KERNEL);
268 if (!rd) {
269 err = -ENOMEM;
270 goto out;
271 }
Al Viroe72514e2013-05-22 14:59:39 -0400272 file->private_data = rd;
273 rd->file = file;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200274 list_add(&rd->list, &HFSPLUS_I(inode)->open_dir_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 }
276 memcpy(&rd->key, fd.key, sizeof(struct hfsplus_cat_key));
277out:
Hin-Tak Leung017f8da2014-06-06 14:36:21 -0700278 kfree(strbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 hfs_find_exit(&fd);
280 return err;
281}
282
283static int hfsplus_dir_release(struct inode *inode, struct file *file)
284{
285 struct hfsplus_readdir_data *rd = file->private_data;
286 if (rd) {
Christoph Hellwig89755dc2010-10-01 05:45:25 +0200287 mutex_lock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 list_del(&rd->list);
Christoph Hellwig89755dc2010-10-01 05:45:25 +0200289 mutex_unlock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 kfree(rd);
291 }
292 return 0;
293}
294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir,
296 struct dentry *dst_dentry)
297{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200298 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dst_dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 struct inode *inode = src_dentry->d_inode;
300 struct inode *src_dir = src_dentry->d_parent->d_inode;
301 struct qstr str;
302 char name[32];
303 u32 cnid, id;
304 int res;
305
306 if (HFSPLUS_IS_RSRC(inode))
307 return -EPERM;
Christoph Hellwigf6089ff2010-10-14 09:54:28 -0400308 if (!S_ISREG(inode->i_mode))
309 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200311 mutex_lock(&sbi->vh_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 if (inode->i_ino == (u32)(unsigned long)src_dentry->d_fsdata) {
313 for (;;) {
314 get_random_bytes(&id, sizeof(cnid));
315 id &= 0x3fffffff;
316 str.name = name;
317 str.len = sprintf(name, "iNode%d", id);
318 res = hfsplus_rename_cat(inode->i_ino,
319 src_dir, &src_dentry->d_name,
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200320 sbi->hidden_dir, &str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 if (!res)
322 break;
323 if (res != -EEXIST)
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200324 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 }
Christoph Hellwigf6089ff2010-10-14 09:54:28 -0400326 HFSPLUS_I(inode)->linkid = id;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200327 cnid = sbi->next_cnid++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 src_dentry->d_fsdata = (void *)(unsigned long)cnid;
Anton Salikhmetov2753cc22010-12-16 18:08:38 +0200329 res = hfsplus_create_cat(cnid, src_dir,
330 &src_dentry->d_name, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 if (res)
332 /* panic? */
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200333 goto out;
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200334 sbi->file_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 }
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200336 cnid = sbi->next_cnid++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 res = hfsplus_create_cat(cnid, dst_dir, &dst_dentry->d_name, inode);
338 if (res)
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200339 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Dave Hansend8c76e62006-09-30 23:29:04 -0700341 inc_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 hfsplus_instantiate(dst_dentry, inode, cnid);
Al Viro7de9c6ee2010-10-23 11:11:40 -0400343 ihold(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 inode->i_ctime = CURRENT_TIME_SEC;
345 mark_inode_dirty(inode);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200346 sbi->file_count++;
Artem Bityutskiy9e6c5822012-07-12 17:26:31 +0300347 hfsplus_mark_mdb_dirty(dst_dir->i_sb);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200348out:
349 mutex_unlock(&sbi->vh_mutex);
350 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351}
352
353static int hfsplus_unlink(struct inode *dir, struct dentry *dentry)
354{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200355 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 struct inode *inode = dentry->d_inode;
357 struct qstr str;
358 char name[32];
359 u32 cnid;
360 int res;
361
362 if (HFSPLUS_IS_RSRC(inode))
363 return -EPERM;
364
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200365 mutex_lock(&sbi->vh_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 cnid = (u32)(unsigned long)dentry->d_fsdata;
367 if (inode->i_ino == cnid &&
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200368 atomic_read(&HFSPLUS_I(inode)->opencnt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 str.name = name;
370 str.len = sprintf(name, "temp%lu", inode->i_ino);
371 res = hfsplus_rename_cat(inode->i_ino,
372 dir, &dentry->d_name,
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200373 sbi->hidden_dir, &str);
Christoph Hellwig85b8fe82010-10-27 13:45:50 +0200374 if (!res) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 inode->i_flags |= S_DEAD;
Christoph Hellwig85b8fe82010-10-27 13:45:50 +0200376 drop_nlink(inode);
377 }
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200378 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 }
380 res = hfsplus_delete_cat(cnid, dir, &dentry->d_name);
381 if (res)
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200382 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Roman Zippelaf8c85b2006-01-18 17:43:10 -0800384 if (inode->i_nlink > 0)
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700385 drop_nlink(inode);
Roman Zippel76b0c262008-04-09 17:44:07 +0200386 if (inode->i_ino == cnid)
Dave Hansence71ec32006-09-30 23:29:06 -0700387 clear_nlink(inode);
Roman Zippel76b0c262008-04-09 17:44:07 +0200388 if (!inode->i_nlink) {
389 if (inode->i_ino != cnid) {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200390 sbi->file_count--;
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200391 if (!atomic_read(&HFSPLUS_I(inode)->opencnt)) {
Roman Zippel76b0c262008-04-09 17:44:07 +0200392 res = hfsplus_delete_cat(inode->i_ino,
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200393 sbi->hidden_dir,
Roman Zippel76b0c262008-04-09 17:44:07 +0200394 NULL);
395 if (!res)
396 hfsplus_delete_inode(inode);
397 } else
398 inode->i_flags |= S_DEAD;
399 } else
400 hfsplus_delete_inode(inode);
401 } else
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200402 sbi->file_count--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 inode->i_ctime = CURRENT_TIME_SEC;
404 mark_inode_dirty(inode);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200405out:
406 mutex_unlock(&sbi->vh_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 return res;
408}
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410static int hfsplus_rmdir(struct inode *dir, struct dentry *dentry)
411{
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200412 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
413 struct inode *inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 int res;
415
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 if (inode->i_size != 2)
417 return -ENOTEMPTY;
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200418
419 mutex_lock(&sbi->vh_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 res = hfsplus_delete_cat(inode->i_ino, dir, &dentry->d_name);
421 if (res)
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200422 goto out;
Dave Hansence71ec32006-09-30 23:29:06 -0700423 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 inode->i_ctime = CURRENT_TIME_SEC;
425 hfsplus_delete_inode(inode);
426 mark_inode_dirty(inode);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200427out:
428 mutex_unlock(&sbi->vh_mutex);
429 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430}
431
432static int hfsplus_symlink(struct inode *dir, struct dentry *dentry,
433 const char *symname)
434{
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200435 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 struct inode *inode;
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200437 int res = -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200439 mutex_lock(&sbi->vh_mutex);
Christoph Hellwigf17c89b2010-10-01 05:43:54 +0200440 inode = hfsplus_new_inode(dir->i_sb, S_IFLNK | S_IRWXUGO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 if (!inode)
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200442 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
444 res = page_symlink(inode, symname, strlen(symname) + 1);
Christoph Hellwigf17c89b2010-10-01 05:43:54 +0200445 if (res)
446 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 res = hfsplus_create_cat(inode->i_ino, dir, &dentry->d_name, inode);
Christoph Hellwigf17c89b2010-10-01 05:43:54 +0200449 if (res)
450 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800452 res = hfsplus_init_inode_security(inode, dir, &dentry->d_name);
453 if (res == -EOPNOTSUPP)
454 res = 0; /* Operation is not supported. */
455 else if (res) {
456 /* Try to delete anyway without error analysis. */
457 hfsplus_delete_cat(inode->i_ino, dir, &dentry->d_name);
458 goto out_err;
459 }
460
Christoph Hellwigf17c89b2010-10-01 05:43:54 +0200461 hfsplus_instantiate(dentry, inode, inode->i_ino);
462 mark_inode_dirty(inode);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200463 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
Christoph Hellwigf17c89b2010-10-01 05:43:54 +0200465out_err:
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200466 clear_nlink(inode);
Christoph Hellwigf17c89b2010-10-01 05:43:54 +0200467 hfsplus_delete_inode(inode);
468 iput(inode);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200469out:
470 mutex_unlock(&sbi->vh_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 return res;
472}
473
474static int hfsplus_mknod(struct inode *dir, struct dentry *dentry,
Al Viro1a67aaf2011-07-26 01:52:52 -0400475 umode_t mode, dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476{
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200477 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 struct inode *inode;
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200479 int res = -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200481 mutex_lock(&sbi->vh_mutex);
Christoph Hellwig30d3abb2010-10-01 05:43:50 +0200482 inode = hfsplus_new_inode(dir->i_sb, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 if (!inode)
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200484 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
Christoph Hellwig90e61692010-10-14 09:54:39 -0400486 if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode))
487 init_special_inode(inode, mode, rdev);
488
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 res = hfsplus_create_cat(inode->i_ino, dir, &dentry->d_name, inode);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800490 if (res)
491 goto failed_mknod;
492
493 res = hfsplus_init_inode_security(inode, dir, &dentry->d_name);
494 if (res == -EOPNOTSUPP)
495 res = 0; /* Operation is not supported. */
496 else if (res) {
497 /* Try to delete anyway without error analysis. */
498 hfsplus_delete_cat(inode->i_ino, dir, &dentry->d_name);
499 goto failed_mknod;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 }
Christoph Hellwig30d3abb2010-10-01 05:43:50 +0200501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 hfsplus_instantiate(dentry, inode, inode->i_ino);
503 mark_inode_dirty(inode);
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800504 goto out;
505
506failed_mknod:
507 clear_nlink(inode);
508 hfsplus_delete_inode(inode);
509 iput(inode);
Christoph Hellwig7ac9fb92010-10-01 05:45:08 +0200510out:
511 mutex_unlock(&sbi->vh_mutex);
512 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513}
514
Al Viro4acdaf22011-07-26 01:42:34 -0400515static int hfsplus_create(struct inode *dir, struct dentry *dentry, umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -0400516 bool excl)
Christoph Hellwig30d3abb2010-10-01 05:43:50 +0200517{
518 return hfsplus_mknod(dir, dentry, mode, 0);
519}
520
Al Viro18bb1db2011-07-26 01:41:39 -0400521static int hfsplus_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
Christoph Hellwig30d3abb2010-10-01 05:43:50 +0200522{
523 return hfsplus_mknod(dir, dentry, mode | S_IFDIR, 0);
524}
525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526static int hfsplus_rename(struct inode *old_dir, struct dentry *old_dentry,
527 struct inode *new_dir, struct dentry *new_dentry)
528{
529 int res;
530
531 /* Unlink destination if it already exists */
532 if (new_dentry->d_inode) {
David Howellse36cb0b2015-01-29 12:02:35 +0000533 if (d_is_dir(new_dentry))
Christoph Hellwig40de9a72010-10-01 09:12:08 +0200534 res = hfsplus_rmdir(new_dir, new_dentry);
Sage Weile3911782011-05-27 13:42:06 -0700535 else
Christoph Hellwig40de9a72010-10-01 09:12:08 +0200536 res = hfsplus_unlink(new_dir, new_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 if (res)
538 return res;
539 }
540
541 res = hfsplus_rename_cat((u32)(unsigned long)old_dentry->d_fsdata,
542 old_dir, &old_dentry->d_name,
543 new_dir, &new_dentry->d_name);
544 if (!res)
545 new_dentry->d_fsdata = old_dentry->d_fsdata;
546 return res;
547}
548
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800549const struct inode_operations hfsplus_dir_inode_operations = {
Vyacheslav Dubeyko324ef392013-02-27 17:03:04 -0800550 .lookup = hfsplus_lookup,
551 .create = hfsplus_create,
552 .link = hfsplus_link,
553 .unlink = hfsplus_unlink,
554 .mkdir = hfsplus_mkdir,
555 .rmdir = hfsplus_rmdir,
556 .symlink = hfsplus_symlink,
557 .mknod = hfsplus_mknod,
558 .rename = hfsplus_rename,
559 .setxattr = generic_setxattr,
560 .getxattr = generic_getxattr,
561 .listxattr = hfsplus_listxattr,
Christoph Hellwigb168fff2014-01-29 23:59:19 -0800562 .removexattr = generic_removexattr,
Vyacheslav Dubeykob4c11072013-09-11 14:24:30 -0700563#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
564 .get_acl = hfsplus_get_posix_acl,
Christoph Hellwigb0a7ab52013-12-20 05:16:46 -0800565 .set_acl = hfsplus_set_posix_acl,
Vyacheslav Dubeykob4c11072013-09-11 14:24:30 -0700566#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567};
568
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800569const struct file_operations hfsplus_dir_operations = {
Christoph Hellwigeb29d662010-11-23 14:38:10 +0100570 .fsync = hfsplus_file_fsync,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 .read = generic_read_dir,
Al Viroe72514e2013-05-22 14:59:39 -0400572 .iterate = hfsplus_readdir,
Arnd Bergmann7cc4bcc2010-04-27 16:24:20 +0200573 .unlocked_ioctl = hfsplus_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 .llseek = generic_file_llseek,
575 .release = hfsplus_dir_release,
576};