Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * JFFS2 -- Journalling Flash File System, Version 2. |
| 3 | * |
David Woodhouse | c00c310 | 2007-04-25 14:16:47 +0100 | [diff] [blame] | 4 | * Copyright © 2001-2007 Red Hat, Inc. |
David Woodhouse | 6088c05 | 2010-08-08 14:15:22 +0100 | [diff] [blame] | 5 | * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * Created by David Woodhouse <dwmw2@infradead.org> |
| 8 | * |
| 9 | * For licensing information, see the file 'LICENCE' in this directory. |
| 10 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/fs.h> |
| 16 | #include <linux/crc32.h> |
| 17 | #include <linux/jffs2.h> |
David Woodhouse | cbb9a56 | 2006-05-03 13:07:27 +0100 | [diff] [blame] | 18 | #include "jffs2_fs_i.h" |
| 19 | #include "jffs2_fs_sb.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/time.h> |
| 21 | #include "nodelist.h" |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | static int jffs2_readdir (struct file *, void *, filldir_t); |
| 24 | |
| 25 | static int jffs2_create (struct inode *,struct dentry *,int, |
| 26 | struct nameidata *); |
| 27 | static struct dentry *jffs2_lookup (struct inode *,struct dentry *, |
| 28 | struct nameidata *); |
| 29 | static int jffs2_link (struct dentry *,struct inode *,struct dentry *); |
| 30 | static int jffs2_unlink (struct inode *,struct dentry *); |
| 31 | static int jffs2_symlink (struct inode *,struct dentry *,const char *); |
| 32 | static int jffs2_mkdir (struct inode *,struct dentry *,int); |
| 33 | static int jffs2_rmdir (struct inode *,struct dentry *); |
David Woodhouse | 265489f | 2005-07-06 13:13:13 +0100 | [diff] [blame] | 34 | static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | static int jffs2_rename (struct inode *, struct dentry *, |
David Woodhouse | ef53cb0 | 2007-07-10 10:01:22 +0100 | [diff] [blame] | 36 | struct inode *, struct dentry *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 38 | const struct file_operations jffs2_dir_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | { |
| 40 | .read = generic_read_dir, |
| 41 | .readdir = jffs2_readdir, |
Stoyan Gaydarov | 0533400 | 2008-07-07 07:45:59 -0500 | [diff] [blame] | 42 | .unlocked_ioctl=jffs2_ioctl, |
Christoph Hellwig | 3222a3e | 2008-09-03 21:53:01 +0200 | [diff] [blame] | 43 | .fsync = jffs2_fsync, |
| 44 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | }; |
| 46 | |
| 47 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 48 | const struct inode_operations jffs2_dir_inode_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
David Woodhouse | 265489f | 2005-07-06 13:13:13 +0100 | [diff] [blame] | 50 | .create = jffs2_create, |
| 51 | .lookup = jffs2_lookup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | .link = jffs2_link, |
| 53 | .unlink = jffs2_unlink, |
| 54 | .symlink = jffs2_symlink, |
| 55 | .mkdir = jffs2_mkdir, |
| 56 | .rmdir = jffs2_rmdir, |
| 57 | .mknod = jffs2_mknod, |
| 58 | .rename = jffs2_rename, |
Linus Torvalds | 18f4c64 | 2009-08-28 12:29:03 -0700 | [diff] [blame] | 59 | .check_acl = jffs2_check_acl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | .setattr = jffs2_setattr, |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 61 | .setxattr = jffs2_setxattr, |
| 62 | .getxattr = jffs2_getxattr, |
| 63 | .listxattr = jffs2_listxattr, |
| 64 | .removexattr = jffs2_removexattr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | /***********************************************************************/ |
| 68 | |
| 69 | |
| 70 | /* We keep the dirent list sorted in increasing order of name hash, |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 71 | and we use the same hash function as the dentries. Makes this |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | nice and simple |
| 73 | */ |
| 74 | static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target, |
| 75 | struct nameidata *nd) |
| 76 | { |
| 77 | struct jffs2_inode_info *dir_f; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | struct jffs2_full_dirent *fd = NULL, *fd_list; |
| 79 | uint32_t ino = 0; |
| 80 | struct inode *inode = NULL; |
| 81 | |
| 82 | D1(printk(KERN_DEBUG "jffs2_lookup()\n")); |
| 83 | |
Richard Purdie | 373d5e7 | 2006-04-18 02:05:46 +0100 | [diff] [blame] | 84 | if (target->d_name.len > JFFS2_MAX_NAME_LEN) |
| 85 | return ERR_PTR(-ENAMETOOLONG); |
| 86 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | dir_f = JFFS2_INODE_INFO(dir_i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 89 | mutex_lock(&dir_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | /* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */ |
| 92 | for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) { |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 93 | if (fd_list->nhash == target->d_name.hash && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | (!fd || fd_list->version > fd->version) && |
| 95 | strlen(fd_list->name) == target->d_name.len && |
| 96 | !strncmp(fd_list->name, target->d_name.name, target->d_name.len)) { |
| 97 | fd = fd_list; |
| 98 | } |
| 99 | } |
| 100 | if (fd) |
| 101 | ino = fd->ino; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 102 | mutex_unlock(&dir_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | if (ino) { |
David Howells | 5451f79 | 2008-02-07 00:15:42 -0800 | [diff] [blame] | 104 | inode = jffs2_iget(dir_i->i_sb, ino); |
Al Viro | a904937 | 2011-07-08 21:20:11 -0400 | [diff] [blame] | 105 | if (IS_ERR(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | printk(KERN_WARNING "iget() failed for ino #%u\n", ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | |
David Woodhouse | 8966c5e | 2008-08-18 15:36:47 +0100 | [diff] [blame] | 109 | return d_splice_alias(inode, target); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | /***********************************************************************/ |
| 113 | |
| 114 | |
| 115 | static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir) |
| 116 | { |
| 117 | struct jffs2_inode_info *f; |
Josef Sipek | ec2e203 | 2006-12-08 02:37:16 -0800 | [diff] [blame] | 118 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | struct jffs2_full_dirent *fd; |
| 120 | unsigned long offset, curofs; |
| 121 | |
Josef Sipek | ec2e203 | 2006-12-08 02:37:16 -0800 | [diff] [blame] | 122 | D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu\n", filp->f_path.dentry->d_inode->i_ino)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
| 124 | f = JFFS2_INODE_INFO(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | offset = filp->f_pos; |
| 127 | |
| 128 | if (offset == 0) { |
| 129 | D1(printk(KERN_DEBUG "Dirent 0: \".\", ino #%lu\n", inode->i_ino)); |
| 130 | if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0) |
| 131 | goto out; |
| 132 | offset++; |
| 133 | } |
| 134 | if (offset == 1) { |
Josef Sipek | ec2e203 | 2006-12-08 02:37:16 -0800 | [diff] [blame] | 135 | unsigned long pino = parent_ino(filp->f_path.dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | D1(printk(KERN_DEBUG "Dirent 1: \"..\", ino #%lu\n", pino)); |
| 137 | if (filldir(dirent, "..", 2, 1, pino, DT_DIR) < 0) |
| 138 | goto out; |
| 139 | offset++; |
| 140 | } |
| 141 | |
| 142 | curofs=1; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 143 | mutex_lock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | for (fd = f->dents; fd; fd = fd->next) { |
| 145 | |
| 146 | curofs++; |
| 147 | /* First loop: curofs = 2; offset = 2 */ |
| 148 | if (curofs < offset) { |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 149 | D2(printk(KERN_DEBUG "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | fd->name, fd->ino, fd->type, curofs, offset)); |
| 151 | continue; |
| 152 | } |
| 153 | if (!fd->ino) { |
| 154 | D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name)); |
| 155 | offset++; |
| 156 | continue; |
| 157 | } |
| 158 | D2(printk(KERN_DEBUG "Dirent %ld: \"%s\", ino #%u, type %d\n", offset, fd->name, fd->ino, fd->type)); |
| 159 | if (filldir(dirent, fd->name, strlen(fd->name), offset, fd->ino, fd->type) < 0) |
| 160 | break; |
| 161 | offset++; |
| 162 | } |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 163 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | out: |
| 165 | filp->f_pos = offset; |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | /***********************************************************************/ |
| 170 | |
| 171 | |
| 172 | static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode, |
| 173 | struct nameidata *nd) |
| 174 | { |
| 175 | struct jffs2_raw_inode *ri; |
| 176 | struct jffs2_inode_info *f, *dir_f; |
| 177 | struct jffs2_sb_info *c; |
| 178 | struct inode *inode; |
| 179 | int ret; |
| 180 | |
| 181 | ri = jffs2_alloc_raw_inode(); |
| 182 | if (!ri) |
| 183 | return -ENOMEM; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | c = JFFS2_SB_INFO(dir_i->i_sb); |
| 186 | |
| 187 | D1(printk(KERN_DEBUG "jffs2_create()\n")); |
| 188 | |
KaiGai Kohei | cfc8dc6 | 2007-09-14 15:16:35 +0900 | [diff] [blame] | 189 | inode = jffs2_new_inode(dir_i, mode, ri); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
| 191 | if (IS_ERR(inode)) { |
| 192 | D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n")); |
| 193 | jffs2_free_raw_inode(ri); |
| 194 | return PTR_ERR(inode); |
| 195 | } |
| 196 | |
| 197 | inode->i_op = &jffs2_file_inode_operations; |
| 198 | inode->i_fop = &jffs2_file_operations; |
| 199 | inode->i_mapping->a_ops = &jffs2_file_address_operations; |
| 200 | inode->i_mapping->nrpages = 0; |
| 201 | |
| 202 | f = JFFS2_INODE_INFO(inode); |
| 203 | dir_f = JFFS2_INODE_INFO(dir_i); |
| 204 | |
David Woodhouse | 590fe34 | 2008-05-01 15:53:28 +0100 | [diff] [blame] | 205 | /* jffs2_do_create() will want to lock it, _after_ reserving |
| 206 | space and taking c-alloc_sem. If we keep it locked here, |
| 207 | lockdep gets unhappy (although it's a false positive; |
| 208 | nothing else will be looking at this inode yet so there's |
| 209 | no chance of AB-BA deadlock involving its f->sem). */ |
| 210 | mutex_unlock(&f->sem); |
| 211 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 212 | ret = jffs2_do_create(c, dir_f, f, ri, &dentry->d_name); |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 213 | if (ret) |
| 214 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime)); |
| 217 | |
| 218 | jffs2_free_raw_inode(ri); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n", |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 221 | inode->i_ino, inode->i_mode, inode->i_nlink, |
| 222 | f->inocache->pino_nlink, inode->i_mapping->nrpages)); |
David Woodhouse | e72e649 | 2010-06-03 08:09:12 +0100 | [diff] [blame] | 223 | |
| 224 | d_instantiate(dentry, inode); |
| 225 | unlock_new_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | return 0; |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 227 | |
| 228 | fail: |
Al Viro | 41cce64 | 2010-06-08 13:24:56 -0400 | [diff] [blame] | 229 | iget_failed(inode); |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 230 | jffs2_free_raw_inode(ri); |
| 231 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | /***********************************************************************/ |
| 235 | |
| 236 | |
| 237 | static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry) |
| 238 | { |
| 239 | struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb); |
| 240 | struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i); |
| 241 | struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(dentry->d_inode); |
| 242 | int ret; |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 243 | uint32_t now = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 245 | ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name, |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 246 | dentry->d_name.len, dead_f, now); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | if (dead_f->inocache) |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 248 | dentry->d_inode->i_nlink = dead_f->inocache->pino_nlink; |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 249 | if (!ret) |
| 250 | dir_i->i_mtime = dir_i->i_ctime = ITIME(now); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | return ret; |
| 252 | } |
| 253 | /***********************************************************************/ |
| 254 | |
| 255 | |
| 256 | static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry) |
| 257 | { |
| 258 | struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb); |
| 259 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode); |
| 260 | struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i); |
| 261 | int ret; |
| 262 | uint8_t type; |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 263 | uint32_t now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
| 265 | /* Don't let people make hard links to bad inodes. */ |
| 266 | if (!f->inocache) |
| 267 | return -EIO; |
| 268 | |
| 269 | if (S_ISDIR(old_dentry->d_inode->i_mode)) |
| 270 | return -EPERM; |
| 271 | |
| 272 | /* XXX: This is ugly */ |
| 273 | type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12; |
| 274 | if (!type) type = DT_REG; |
| 275 | |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 276 | now = get_seconds(); |
| 277 | ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
| 279 | if (!ret) { |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 280 | mutex_lock(&f->sem); |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 281 | old_dentry->d_inode->i_nlink = ++f->inocache->pino_nlink; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 282 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | d_instantiate(dentry, old_dentry->d_inode); |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 284 | dir_i->i_mtime = dir_i->i_ctime = ITIME(now); |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 285 | ihold(old_dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | } |
| 287 | return ret; |
| 288 | } |
| 289 | |
| 290 | /***********************************************************************/ |
| 291 | |
| 292 | static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target) |
| 293 | { |
| 294 | struct jffs2_inode_info *f, *dir_f; |
| 295 | struct jffs2_sb_info *c; |
| 296 | struct inode *inode; |
| 297 | struct jffs2_raw_inode *ri; |
| 298 | struct jffs2_raw_dirent *rd; |
| 299 | struct jffs2_full_dnode *fn; |
| 300 | struct jffs2_full_dirent *fd; |
| 301 | int namelen; |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 302 | uint32_t alloclen; |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 303 | int ret, targetlen = strlen(target); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
| 305 | /* FIXME: If you care. We'd need to use frags for the target |
| 306 | if it grows much more than this */ |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 307 | if (targetlen > 254) |
Adrian Hunter | bde86fe | 2008-08-14 11:57:45 +0300 | [diff] [blame] | 308 | return -ENAMETOOLONG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
| 310 | ri = jffs2_alloc_raw_inode(); |
| 311 | |
| 312 | if (!ri) |
| 313 | return -ENOMEM; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | c = JFFS2_SB_INFO(dir_i->i_sb); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 316 | |
| 317 | /* Try to reserve enough space for both node and dirent. |
| 318 | * Just the node will do for now, though |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | */ |
| 320 | namelen = dentry->d_name.len; |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 321 | ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen, |
| 322 | ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | if (ret) { |
| 325 | jffs2_free_raw_inode(ri); |
| 326 | return ret; |
| 327 | } |
| 328 | |
KaiGai Kohei | cfc8dc6 | 2007-09-14 15:16:35 +0900 | [diff] [blame] | 329 | inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
| 331 | if (IS_ERR(inode)) { |
| 332 | jffs2_free_raw_inode(ri); |
| 333 | jffs2_complete_reservation(c); |
| 334 | return PTR_ERR(inode); |
| 335 | } |
| 336 | |
| 337 | inode->i_op = &jffs2_symlink_inode_operations; |
| 338 | |
| 339 | f = JFFS2_INODE_INFO(inode); |
| 340 | |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 341 | inode->i_size = targetlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size); |
| 343 | ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size); |
| 344 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); |
| 345 | |
| 346 | ri->compr = JFFS2_COMPR_NONE; |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 347 | ri->data_crc = cpu_to_je32(crc32(0, target, targetlen)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 349 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 350 | fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
| 352 | jffs2_free_raw_inode(ri); |
| 353 | |
| 354 | if (IS_ERR(fn)) { |
| 355 | /* Eeek. Wave bye bye */ |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 356 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | jffs2_complete_reservation(c); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 358 | ret = PTR_ERR(fn); |
| 359 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 361 | |
Artem B. Bityutskiy | 2b79adc | 2005-07-17 12:13:51 +0100 | [diff] [blame] | 362 | /* We use f->target field to store the target path. */ |
Julia Lawall | 04aadf3 | 2010-10-17 21:56:15 +0200 | [diff] [blame] | 363 | f->target = kmemdup(target, targetlen + 1, GFP_KERNEL); |
Artem B. Bityutskiy | 2b79adc | 2005-07-17 12:13:51 +0100 | [diff] [blame] | 364 | if (!f->target) { |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 365 | printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 366 | mutex_unlock(&f->sem); |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 367 | jffs2_complete_reservation(c); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 368 | ret = -ENOMEM; |
| 369 | goto fail; |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 370 | } |
| 371 | |
Artem B. Bityutskiy | 2b79adc | 2005-07-17 12:13:51 +0100 | [diff] [blame] | 372 | D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target)); |
Artem B. Bityuckiy | 32f1a95 | 2005-03-01 10:50:52 +0000 | [diff] [blame] | 373 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 374 | /* No data here. Only a metadata node, which will be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | obsoleted by the first data write |
| 376 | */ |
| 377 | f->metadata = fn; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 378 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
| 380 | jffs2_complete_reservation(c); |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 381 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 382 | ret = jffs2_init_security(inode, dir_i, &dentry->d_name); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 383 | if (ret) |
| 384 | goto fail; |
| 385 | |
KaiGai Kohei | cfc8dc6 | 2007-09-14 15:16:35 +0900 | [diff] [blame] | 386 | ret = jffs2_init_acl_post(inode); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 387 | if (ret) |
| 388 | goto fail; |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 389 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 390 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
| 391 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 392 | if (ret) |
| 393 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
| 395 | rd = jffs2_alloc_raw_dirent(); |
| 396 | if (!rd) { |
| 397 | /* Argh. Now we treat it like a normal delete */ |
| 398 | jffs2_complete_reservation(c); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 399 | ret = -ENOMEM; |
| 400 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | dir_f = JFFS2_INODE_INFO(dir_i); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 404 | mutex_lock(&dir_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
| 406 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
| 407 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); |
| 408 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); |
| 409 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); |
| 410 | |
| 411 | rd->pino = cpu_to_je32(dir_i->i_ino); |
| 412 | rd->version = cpu_to_je32(++dir_f->highest_version); |
| 413 | rd->ino = cpu_to_je32(inode->i_ino); |
| 414 | rd->mctime = cpu_to_je32(get_seconds()); |
| 415 | rd->nsize = namelen; |
| 416 | rd->type = DT_LNK; |
| 417 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); |
| 418 | rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen)); |
| 419 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 420 | fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
| 422 | if (IS_ERR(fd)) { |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 423 | /* dirent failed to write. Delete the inode normally |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | as if it were the final unlink() */ |
| 425 | jffs2_complete_reservation(c); |
| 426 | jffs2_free_raw_dirent(rd); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 427 | mutex_unlock(&dir_f->sem); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 428 | ret = PTR_ERR(fd); |
| 429 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime)); |
| 433 | |
| 434 | jffs2_free_raw_dirent(rd); |
| 435 | |
| 436 | /* Link the fd into the inode's list, obsoleting an old |
| 437 | one if necessary. */ |
| 438 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); |
| 439 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 440 | mutex_unlock(&dir_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | jffs2_complete_reservation(c); |
| 442 | |
| 443 | d_instantiate(dentry, inode); |
David Woodhouse | e72e649 | 2010-06-03 08:09:12 +0100 | [diff] [blame] | 444 | unlock_new_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | return 0; |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 446 | |
| 447 | fail: |
Al Viro | 41cce64 | 2010-06-08 13:24:56 -0400 | [diff] [blame] | 448 | iget_failed(inode); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 449 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
| 451 | |
| 452 | |
| 453 | static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode) |
| 454 | { |
| 455 | struct jffs2_inode_info *f, *dir_f; |
| 456 | struct jffs2_sb_info *c; |
| 457 | struct inode *inode; |
| 458 | struct jffs2_raw_inode *ri; |
| 459 | struct jffs2_raw_dirent *rd; |
| 460 | struct jffs2_full_dnode *fn; |
| 461 | struct jffs2_full_dirent *fd; |
| 462 | int namelen; |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 463 | uint32_t alloclen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | int ret; |
| 465 | |
| 466 | mode |= S_IFDIR; |
| 467 | |
| 468 | ri = jffs2_alloc_raw_inode(); |
| 469 | if (!ri) |
| 470 | return -ENOMEM; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | c = JFFS2_SB_INFO(dir_i->i_sb); |
| 473 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 474 | /* Try to reserve enough space for both node and dirent. |
| 475 | * Just the node will do for now, though |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | */ |
| 477 | namelen = dentry->d_name.len; |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 478 | ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, |
| 479 | JFFS2_SUMMARY_INODE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | if (ret) { |
| 482 | jffs2_free_raw_inode(ri); |
| 483 | return ret; |
| 484 | } |
| 485 | |
KaiGai Kohei | cfc8dc6 | 2007-09-14 15:16:35 +0900 | [diff] [blame] | 486 | inode = jffs2_new_inode(dir_i, mode, ri); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
| 488 | if (IS_ERR(inode)) { |
| 489 | jffs2_free_raw_inode(ri); |
| 490 | jffs2_complete_reservation(c); |
| 491 | return PTR_ERR(inode); |
| 492 | } |
| 493 | |
| 494 | inode->i_op = &jffs2_dir_inode_operations; |
| 495 | inode->i_fop = &jffs2_dir_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
| 497 | f = JFFS2_INODE_INFO(inode); |
| 498 | |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 499 | /* Directories get nlink 2 at start */ |
| 500 | inode->i_nlink = 2; |
| 501 | /* but ic->pino_nlink is the parent ino# */ |
| 502 | f->inocache->pino_nlink = dir_i->i_ino; |
| 503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | ri->data_crc = cpu_to_je32(0); |
| 505 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 506 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 507 | fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
| 509 | jffs2_free_raw_inode(ri); |
| 510 | |
| 511 | if (IS_ERR(fn)) { |
| 512 | /* Eeek. Wave bye bye */ |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 513 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | jffs2_complete_reservation(c); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 515 | ret = PTR_ERR(fn); |
| 516 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | } |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 518 | /* No data here. Only a metadata node, which will be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | obsoleted by the first data write |
| 520 | */ |
| 521 | f->metadata = fn; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 522 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | jffs2_complete_reservation(c); |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 525 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 526 | ret = jffs2_init_security(inode, dir_i, &dentry->d_name); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 527 | if (ret) |
| 528 | goto fail; |
| 529 | |
KaiGai Kohei | cfc8dc6 | 2007-09-14 15:16:35 +0900 | [diff] [blame] | 530 | ret = jffs2_init_acl_post(inode); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 531 | if (ret) |
| 532 | goto fail; |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 533 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 534 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
| 535 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 536 | if (ret) |
| 537 | goto fail; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | rd = jffs2_alloc_raw_dirent(); |
| 540 | if (!rd) { |
| 541 | /* Argh. Now we treat it like a normal delete */ |
| 542 | jffs2_complete_reservation(c); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 543 | ret = -ENOMEM; |
| 544 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | dir_f = JFFS2_INODE_INFO(dir_i); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 548 | mutex_lock(&dir_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
| 550 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
| 551 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); |
| 552 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); |
| 553 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); |
| 554 | |
| 555 | rd->pino = cpu_to_je32(dir_i->i_ino); |
| 556 | rd->version = cpu_to_je32(++dir_f->highest_version); |
| 557 | rd->ino = cpu_to_je32(inode->i_ino); |
| 558 | rd->mctime = cpu_to_je32(get_seconds()); |
| 559 | rd->nsize = namelen; |
| 560 | rd->type = DT_DIR; |
| 561 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); |
| 562 | rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen)); |
| 563 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 564 | fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | if (IS_ERR(fd)) { |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 567 | /* dirent failed to write. Delete the inode normally |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | as if it were the final unlink() */ |
| 569 | jffs2_complete_reservation(c); |
| 570 | jffs2_free_raw_dirent(rd); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 571 | mutex_unlock(&dir_f->sem); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 572 | ret = PTR_ERR(fd); |
| 573 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | |
| 576 | dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime)); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 577 | inc_nlink(dir_i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
| 579 | jffs2_free_raw_dirent(rd); |
| 580 | |
| 581 | /* Link the fd into the inode's list, obsoleting an old |
| 582 | one if necessary. */ |
| 583 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); |
| 584 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 585 | mutex_unlock(&dir_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | jffs2_complete_reservation(c); |
| 587 | |
| 588 | d_instantiate(dentry, inode); |
David Woodhouse | e72e649 | 2010-06-03 08:09:12 +0100 | [diff] [blame] | 589 | unlock_new_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | return 0; |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 591 | |
| 592 | fail: |
Al Viro | 41cce64 | 2010-06-08 13:24:56 -0400 | [diff] [blame] | 593 | iget_failed(inode); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 594 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | } |
| 596 | |
| 597 | static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry) |
| 598 | { |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 599 | struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb); |
| 600 | struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode); |
| 602 | struct jffs2_full_dirent *fd; |
| 603 | int ret; |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 604 | uint32_t now = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
| 606 | for (fd = f->dents ; fd; fd = fd->next) { |
| 607 | if (fd->ino) |
| 608 | return -ENOTEMPTY; |
| 609 | } |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 610 | |
| 611 | ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name, |
| 612 | dentry->d_name.len, f, now); |
| 613 | if (!ret) { |
| 614 | dir_i->i_mtime = dir_i->i_ctime = ITIME(now); |
| 615 | clear_nlink(dentry->d_inode); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 616 | drop_nlink(dir_i); |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 617 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | return ret; |
| 619 | } |
| 620 | |
David Woodhouse | 265489f | 2005-07-06 13:13:13 +0100 | [diff] [blame] | 621 | static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | { |
| 623 | struct jffs2_inode_info *f, *dir_f; |
| 624 | struct jffs2_sb_info *c; |
| 625 | struct inode *inode; |
| 626 | struct jffs2_raw_inode *ri; |
| 627 | struct jffs2_raw_dirent *rd; |
| 628 | struct jffs2_full_dnode *fn; |
| 629 | struct jffs2_full_dirent *fd; |
| 630 | int namelen; |
David Woodhouse | aef9ab4 | 2006-05-19 00:28:49 +0100 | [diff] [blame] | 631 | union jffs2_device_node dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | int devlen = 0; |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 633 | uint32_t alloclen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | int ret; |
| 635 | |
David Woodhouse | aef9ab4 | 2006-05-19 00:28:49 +0100 | [diff] [blame] | 636 | if (!new_valid_dev(rdev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | return -EINVAL; |
| 638 | |
| 639 | ri = jffs2_alloc_raw_inode(); |
| 640 | if (!ri) |
| 641 | return -ENOMEM; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | c = JFFS2_SB_INFO(dir_i->i_sb); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 644 | |
David Woodhouse | aef9ab4 | 2006-05-19 00:28:49 +0100 | [diff] [blame] | 645 | if (S_ISBLK(mode) || S_ISCHR(mode)) |
| 646 | devlen = jffs2_encode_dev(&dev, rdev); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 647 | |
| 648 | /* Try to reserve enough space for both node and dirent. |
| 649 | * Just the node will do for now, though |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | */ |
| 651 | namelen = dentry->d_name.len; |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 652 | ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen, |
David Woodhouse | aef9ab4 | 2006-05-19 00:28:49 +0100 | [diff] [blame] | 653 | ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | |
| 655 | if (ret) { |
| 656 | jffs2_free_raw_inode(ri); |
| 657 | return ret; |
| 658 | } |
| 659 | |
KaiGai Kohei | cfc8dc6 | 2007-09-14 15:16:35 +0900 | [diff] [blame] | 660 | inode = jffs2_new_inode(dir_i, mode, ri); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
| 662 | if (IS_ERR(inode)) { |
| 663 | jffs2_free_raw_inode(ri); |
| 664 | jffs2_complete_reservation(c); |
| 665 | return PTR_ERR(inode); |
| 666 | } |
| 667 | inode->i_op = &jffs2_file_inode_operations; |
| 668 | init_special_inode(inode, inode->i_mode, rdev); |
| 669 | |
| 670 | f = JFFS2_INODE_INFO(inode); |
| 671 | |
| 672 | ri->dsize = ri->csize = cpu_to_je32(devlen); |
| 673 | ri->totlen = cpu_to_je32(sizeof(*ri) + devlen); |
| 674 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); |
| 675 | |
| 676 | ri->compr = JFFS2_COMPR_NONE; |
| 677 | ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen)); |
| 678 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 679 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 680 | fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
| 682 | jffs2_free_raw_inode(ri); |
| 683 | |
| 684 | if (IS_ERR(fn)) { |
| 685 | /* Eeek. Wave bye bye */ |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 686 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | jffs2_complete_reservation(c); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 688 | ret = PTR_ERR(fn); |
| 689 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | } |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 691 | /* No data here. Only a metadata node, which will be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | obsoleted by the first data write |
| 693 | */ |
| 694 | f->metadata = fn; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 695 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
| 697 | jffs2_complete_reservation(c); |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 698 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 699 | ret = jffs2_init_security(inode, dir_i, &dentry->d_name); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 700 | if (ret) |
| 701 | goto fail; |
| 702 | |
KaiGai Kohei | cfc8dc6 | 2007-09-14 15:16:35 +0900 | [diff] [blame] | 703 | ret = jffs2_init_acl_post(inode); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 704 | if (ret) |
| 705 | goto fail; |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 706 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 707 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
| 708 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 709 | if (ret) |
| 710 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
| 712 | rd = jffs2_alloc_raw_dirent(); |
| 713 | if (!rd) { |
| 714 | /* Argh. Now we treat it like a normal delete */ |
| 715 | jffs2_complete_reservation(c); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 716 | ret = -ENOMEM; |
| 717 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | dir_f = JFFS2_INODE_INFO(dir_i); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 721 | mutex_lock(&dir_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
| 723 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
| 724 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); |
| 725 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); |
| 726 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); |
| 727 | |
| 728 | rd->pino = cpu_to_je32(dir_i->i_ino); |
| 729 | rd->version = cpu_to_je32(++dir_f->highest_version); |
| 730 | rd->ino = cpu_to_je32(inode->i_ino); |
| 731 | rd->mctime = cpu_to_je32(get_seconds()); |
| 732 | rd->nsize = namelen; |
| 733 | |
| 734 | /* XXX: This is ugly. */ |
| 735 | rd->type = (mode & S_IFMT) >> 12; |
| 736 | |
| 737 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); |
| 738 | rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen)); |
| 739 | |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 740 | fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | if (IS_ERR(fd)) { |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 743 | /* dirent failed to write. Delete the inode normally |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | as if it were the final unlink() */ |
| 745 | jffs2_complete_reservation(c); |
| 746 | jffs2_free_raw_dirent(rd); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 747 | mutex_unlock(&dir_f->sem); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 748 | ret = PTR_ERR(fd); |
| 749 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime)); |
| 753 | |
| 754 | jffs2_free_raw_dirent(rd); |
| 755 | |
| 756 | /* Link the fd into the inode's list, obsoleting an old |
| 757 | one if necessary. */ |
| 758 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); |
| 759 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 760 | mutex_unlock(&dir_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | jffs2_complete_reservation(c); |
| 762 | |
| 763 | d_instantiate(dentry, inode); |
David Woodhouse | e72e649 | 2010-06-03 08:09:12 +0100 | [diff] [blame] | 764 | unlock_new_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | return 0; |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 766 | |
| 767 | fail: |
Al Viro | 41cce64 | 2010-06-08 13:24:56 -0400 | [diff] [blame] | 768 | iget_failed(inode); |
David Woodhouse | f324e4c | 2010-06-03 08:03:39 +0100 | [diff] [blame] | 769 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | } |
| 771 | |
| 772 | static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, |
David Woodhouse | ef53cb0 | 2007-07-10 10:01:22 +0100 | [diff] [blame] | 773 | struct inode *new_dir_i, struct dentry *new_dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | { |
| 775 | int ret; |
| 776 | struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb); |
| 777 | struct jffs2_inode_info *victim_f = NULL; |
| 778 | uint8_t type; |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 779 | uint32_t now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 781 | /* The VFS will check for us and prevent trying to rename a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | * file over a directory and vice versa, but if it's a directory, |
| 783 | * the VFS can't check whether the victim is empty. The filesystem |
| 784 | * needs to do that for itself. |
| 785 | */ |
| 786 | if (new_dentry->d_inode) { |
| 787 | victim_f = JFFS2_INODE_INFO(new_dentry->d_inode); |
| 788 | if (S_ISDIR(new_dentry->d_inode->i_mode)) { |
| 789 | struct jffs2_full_dirent *fd; |
| 790 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 791 | mutex_lock(&victim_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | for (fd = victim_f->dents; fd; fd = fd->next) { |
| 793 | if (fd->ino) { |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 794 | mutex_unlock(&victim_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | return -ENOTEMPTY; |
| 796 | } |
| 797 | } |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 798 | mutex_unlock(&victim_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | } |
| 800 | } |
| 801 | |
| 802 | /* XXX: We probably ought to alloc enough space for |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 803 | both nodes at the same time. Writing the new link, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | then getting -ENOSPC, is quite bad :) |
| 805 | */ |
| 806 | |
| 807 | /* Make a hard link */ |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 808 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | /* XXX: This is ugly */ |
| 810 | type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12; |
| 811 | if (!type) type = DT_REG; |
| 812 | |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 813 | now = get_seconds(); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 814 | ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | old_dentry->d_inode->i_ino, type, |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 816 | new_dentry->d_name.name, new_dentry->d_name.len, now); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
| 818 | if (ret) |
| 819 | return ret; |
| 820 | |
| 821 | if (victim_f) { |
| 822 | /* There was a victim. Kill it off nicely */ |
Al Viro | 22ba747 | 2011-07-21 15:57:47 -0400 | [diff] [blame] | 823 | if (S_ISDIR(new_dentry->d_inode->i_mode)) |
| 824 | clear_nlink(new_dentry->d_inode); |
| 825 | else |
| 826 | drop_nlink(new_dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | /* Don't oops if the victim was a dirent pointing to an |
| 828 | inode which didn't exist. */ |
| 829 | if (victim_f->inocache) { |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 830 | mutex_lock(&victim_f->sem); |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 831 | if (S_ISDIR(new_dentry->d_inode->i_mode)) |
| 832 | victim_f->inocache->pino_nlink = 0; |
| 833 | else |
| 834 | victim_f->inocache->pino_nlink--; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 835 | mutex_unlock(&victim_f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | } |
| 837 | } |
| 838 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 839 | /* If it was a directory we moved, and there was no victim, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | increase i_nlink on its new parent */ |
| 841 | if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f) |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 842 | inc_nlink(new_dir_i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | |
| 844 | /* Unlink the original */ |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 845 | ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i), |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 846 | old_dentry->d_name.name, old_dentry->d_name.len, NULL, now); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | |
| 848 | /* We don't touch inode->i_nlink */ |
| 849 | |
| 850 | if (ret) { |
| 851 | /* Oh shit. We really ought to make a single node which can do both atomically */ |
| 852 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 853 | mutex_lock(&f->sem); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 854 | inc_nlink(old_dentry->d_inode); |
David Woodhouse | 27c72b0 | 2008-05-01 18:47:17 +0100 | [diff] [blame] | 855 | if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode)) |
| 856 | f->inocache->pino_nlink++; |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 857 | mutex_unlock(&f->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
| 859 | printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret); |
| 860 | /* Might as well let the VFS know */ |
| 861 | d_instantiate(new_dentry, old_dentry->d_inode); |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 862 | ihold(old_dentry->d_inode); |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 863 | new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | return ret; |
| 865 | } |
| 866 | |
| 867 | if (S_ISDIR(old_dentry->d_inode->i_mode)) |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 868 | drop_nlink(old_dir_i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
Artem B. Bityutskiy | 3a69e0c | 2005-08-17 14:46:26 +0100 | [diff] [blame] | 870 | new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now); |
| 871 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | return 0; |
| 873 | } |
| 874 | |