1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (C) 2001 Clemson University and The University of Chicago 4 * 5 * See COPYING in top-level directory. 6 */ 7 8 /* 9 * Linux VFS namei operations. 10 */ 11 12 #include "protocol.h" 13 #include "orangefs-kernel.h" 14 15 /* 16 * Get a newly allocated inode to go with a negative dentry. 17 */ 18 static int orangefs_create(struct mnt_idmap *idmap, 19 struct inode *dir, 20 struct dentry *dentry, 21 umode_t mode, 22 bool exclusive) 23 { 24 struct orangefs_inode_s *parent = ORANGEFS_I(dir); 25 struct orangefs_kernel_op_s *new_op; 26 struct orangefs_object_kref ref; 27 struct inode *inode; 28 struct iattr iattr; 29 int ret; 30 31 gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n", 32 __func__, 33 dentry); 34 35 new_op = op_alloc(ORANGEFS_VFS_OP_CREATE); 36 if (!new_op) 37 return -ENOMEM; 38 39 new_op->upcall.req.create.parent_refn = parent->refn; 40 41 fill_default_sys_attrs(new_op->upcall.req.create.attributes, mode); 42 43 strscpy(new_op->upcall.req.create.d_name, dentry->d_name.name); 44 45 ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); 46 47 gossip_debug(GOSSIP_NAME_DEBUG, 48 "%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n", 49 __func__, 50 dentry, 51 &new_op->downcall.resp.create.refn.khandle, 52 new_op->downcall.resp.create.refn.fs_id, 53 new_op, 54 ret); 55 56 if (ret < 0) 57 goto out; 58 59 ref = new_op->downcall.resp.create.refn; 60 61 inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, &ref); 62 if (IS_ERR(inode)) { 63 gossip_err("%s: Failed to allocate inode for file :%pd:\n", 64 __func__, 65 dentry); 66 ret = PTR_ERR(inode); 67 goto out; 68 } 69 70 gossip_debug(GOSSIP_NAME_DEBUG, 71 "%s: Assigned inode :%pU: for file :%pd:\n", 72 __func__, 73 get_khandle_from_ino(inode), 74 dentry); 75 76 d_instantiate_new(dentry, inode); 77 orangefs_set_timeout(dentry); 78 79 gossip_debug(GOSSIP_NAME_DEBUG, 80 "%s: dentry instantiated for %pd\n", 81 __func__, 82 dentry); 83 84 memset(&iattr, 0, sizeof iattr); 85 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; 86 iattr.ia_mtime = iattr.ia_ctime = current_time(dir); 87 __orangefs_setattr(dir, &iattr); 88 ret = 0; 89 out: 90 op_release(new_op); 91 gossip_debug(GOSSIP_NAME_DEBUG, 92 "%s: %pd: returning %d\n", 93 __func__, 94 dentry, 95 ret); 96 return ret; 97 } 98 99 /* 100 * Attempt to resolve an object name (dentry->d_name), parent handle, and 101 * fsid into a handle for the object. 102 */ 103 static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry, 104 unsigned int flags) 105 { 106 struct orangefs_inode_s *parent = ORANGEFS_I(dir); 107 struct orangefs_kernel_op_s *new_op; 108 struct inode *inode; 109 int ret = -EINVAL; 110 111 /* 112 * in theory we could skip a lookup here (if the intent is to 113 * create) in order to avoid a potentially failed lookup, but 114 * leaving it in can skip a valid lookup and try to create a file 115 * that already exists (e.g. the vfs already handles checking for 116 * -EEXIST on O_EXCL opens, which is broken if we skip this lookup 117 * in the create path) 118 */ 119 gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n", 120 __func__, dentry); 121 122 if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1)) 123 return ERR_PTR(-ENAMETOOLONG); 124 125 new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP); 126 if (!new_op) 127 return ERR_PTR(-ENOMEM); 128 129 new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW; 130 131 gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n", 132 __FILE__, 133 __func__, 134 __LINE__, 135 &parent->refn.khandle); 136 new_op->upcall.req.lookup.parent_refn = parent->refn; 137 138 strscpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name); 139 140 gossip_debug(GOSSIP_NAME_DEBUG, 141 "%s: doing lookup on %s under %pU,%d\n", 142 __func__, 143 new_op->upcall.req.lookup.d_name, 144 &new_op->upcall.req.lookup.parent_refn.khandle, 145 new_op->upcall.req.lookup.parent_refn.fs_id); 146 147 ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); 148 149 gossip_debug(GOSSIP_NAME_DEBUG, 150 "Lookup Got %pU, fsid %d (ret=%d)\n", 151 &new_op->downcall.resp.lookup.refn.khandle, 152 new_op->downcall.resp.lookup.refn.fs_id, 153 ret); 154 155 if (ret == 0) { 156 orangefs_set_timeout(dentry); 157 inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn); 158 } else if (ret == -ENOENT) { 159 inode = NULL; 160 } else { 161 /* must be a non-recoverable error */ 162 inode = ERR_PTR(ret); 163 } 164 165 op_release(new_op); 166 return d_splice_alias(inode, dentry); 167 } 168 169 /* return 0 on success; non-zero otherwise */ 170 static int orangefs_unlink(struct inode *dir, struct dentry *dentry) 171 { 172 struct inode *inode = dentry->d_inode; 173 struct orangefs_inode_s *parent = ORANGEFS_I(dir); 174 struct orangefs_kernel_op_s *new_op; 175 struct iattr iattr; 176 int ret; 177 178 gossip_debug(GOSSIP_NAME_DEBUG, 179 "%s: called on %pd\n" 180 " (inode %pU): Parent is %pU | fs_id %d\n", 181 __func__, 182 dentry, 183 get_khandle_from_ino(inode), 184 &parent->refn.khandle, 185 parent->refn.fs_id); 186 187 new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE); 188 if (!new_op) 189 return -ENOMEM; 190 191 new_op->upcall.req.remove.parent_refn = parent->refn; 192 strscpy(new_op->upcall.req.remove.d_name, dentry->d_name.name); 193 194 ret = service_operation(new_op, "orangefs_unlink", 195 get_interruptible_flag(inode)); 196 197 gossip_debug(GOSSIP_NAME_DEBUG, 198 "%s: service_operation returned:%d:\n", 199 __func__, 200 ret); 201 202 op_release(new_op); 203 204 if (!ret) { 205 drop_nlink(inode); 206 207 memset(&iattr, 0, sizeof iattr); 208 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; 209 iattr.ia_mtime = iattr.ia_ctime = current_time(dir); 210 __orangefs_setattr(dir, &iattr); 211 } 212 return ret; 213 } 214 215 static int orangefs_symlink(struct mnt_idmap *idmap, 216 struct inode *dir, 217 struct dentry *dentry, 218 const char *symname) 219 { 220 struct orangefs_inode_s *parent = ORANGEFS_I(dir); 221 struct orangefs_kernel_op_s *new_op; 222 struct orangefs_object_kref ref; 223 struct inode *inode; 224 struct iattr iattr; 225 int mode = 0755; 226 int ret; 227 228 gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__); 229 230 if (!symname) 231 return -EINVAL; 232 233 if (strlen(symname)+1 > ORANGEFS_NAME_MAX) 234 return -ENAMETOOLONG; 235 236 new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK); 237 if (!new_op) 238 return -ENOMEM; 239 240 new_op->upcall.req.sym.parent_refn = parent->refn; 241 242 fill_default_sys_attrs(new_op->upcall.req.sym.attributes, mode); 243 244 strscpy(new_op->upcall.req.sym.entry_name, dentry->d_name.name); 245 strscpy(new_op->upcall.req.sym.target, symname); 246 247 ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); 248 249 gossip_debug(GOSSIP_NAME_DEBUG, 250 "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n", 251 &new_op->downcall.resp.sym.refn.khandle, 252 new_op->downcall.resp.sym.refn.fs_id, ret); 253 254 if (ret < 0) { 255 gossip_debug(GOSSIP_NAME_DEBUG, 256 "%s: failed with error code %d\n", 257 __func__, ret); 258 goto out; 259 } 260 261 ref = new_op->downcall.resp.sym.refn; 262 263 inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref); 264 if (IS_ERR(inode)) { 265 gossip_err 266 ("*** Failed to allocate orangefs symlink inode\n"); 267 ret = PTR_ERR(inode); 268 goto out; 269 } 270 /* 271 * This is necessary because orangefs_inode_getattr will not 272 * re-read symlink size as it is impossible for it to change. 273 * Invalidating the cache does not help. orangefs_new_inode 274 * does not set the correct size (it does not know symname). 275 */ 276 inode->i_size = strlen(symname); 277 278 gossip_debug(GOSSIP_NAME_DEBUG, 279 "Assigned symlink inode new number of %pU\n", 280 get_khandle_from_ino(inode)); 281 282 d_instantiate_new(dentry, inode); 283 orangefs_set_timeout(dentry); 284 285 gossip_debug(GOSSIP_NAME_DEBUG, 286 "Inode (Symlink) %pU -> %pd\n", 287 get_khandle_from_ino(inode), 288 dentry); 289 290 memset(&iattr, 0, sizeof iattr); 291 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; 292 iattr.ia_mtime = iattr.ia_ctime = current_time(dir); 293 __orangefs_setattr(dir, &iattr); 294 ret = 0; 295 out: 296 op_release(new_op); 297 return ret; 298 } 299 300 static struct dentry *orangefs_mkdir(struct mnt_idmap *idmap, struct inode *dir, 301 struct dentry *dentry, umode_t mode) 302 { 303 struct orangefs_inode_s *parent = ORANGEFS_I(dir); 304 struct orangefs_kernel_op_s *new_op; 305 struct orangefs_object_kref ref; 306 struct inode *inode; 307 struct iattr iattr; 308 int ret; 309 310 new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR); 311 if (!new_op) 312 return ERR_PTR(-ENOMEM); 313 314 new_op->upcall.req.mkdir.parent_refn = parent->refn; 315 316 fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes, mode); 317 318 strscpy(new_op->upcall.req.mkdir.d_name, dentry->d_name.name); 319 320 ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); 321 322 gossip_debug(GOSSIP_NAME_DEBUG, 323 "Mkdir Got ORANGEFS handle %pU on fsid %d\n", 324 &new_op->downcall.resp.mkdir.refn.khandle, 325 new_op->downcall.resp.mkdir.refn.fs_id); 326 327 if (ret < 0) { 328 gossip_debug(GOSSIP_NAME_DEBUG, 329 "%s: failed with error code %d\n", 330 __func__, ret); 331 goto out; 332 } 333 334 ref = new_op->downcall.resp.mkdir.refn; 335 336 inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, &ref); 337 if (IS_ERR(inode)) { 338 gossip_err("*** Failed to allocate orangefs dir inode\n"); 339 ret = PTR_ERR(inode); 340 goto out; 341 } 342 343 gossip_debug(GOSSIP_NAME_DEBUG, 344 "Assigned dir inode new number of %pU\n", 345 get_khandle_from_ino(inode)); 346 347 d_instantiate_new(dentry, inode); 348 orangefs_set_timeout(dentry); 349 350 gossip_debug(GOSSIP_NAME_DEBUG, 351 "Inode (Directory) %pU -> %pd\n", 352 get_khandle_from_ino(inode), 353 dentry); 354 355 /* 356 * NOTE: we have no good way to keep nlink consistent for directories 357 * across clients; keep constant at 1. 358 */ 359 memset(&iattr, 0, sizeof iattr); 360 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; 361 iattr.ia_mtime = iattr.ia_ctime = current_time(dir); 362 __orangefs_setattr(dir, &iattr); 363 out: 364 op_release(new_op); 365 return ERR_PTR(ret); 366 } 367 368 static int orangefs_rename(struct mnt_idmap *idmap, 369 struct inode *old_dir, 370 struct dentry *old_dentry, 371 struct inode *new_dir, 372 struct dentry *new_dentry, 373 unsigned int flags) 374 { 375 struct orangefs_kernel_op_s *new_op; 376 struct iattr iattr; 377 int ret; 378 379 if (flags) 380 return -EINVAL; 381 382 gossip_debug(GOSSIP_NAME_DEBUG, 383 "orangefs_rename: called (%pd2 => %pd2) ct=%d\n", 384 old_dentry, new_dentry, d_count(new_dentry)); 385 386 memset(&iattr, 0, sizeof iattr); 387 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; 388 iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir); 389 __orangefs_setattr(new_dir, &iattr); 390 391 new_op = op_alloc(ORANGEFS_VFS_OP_RENAME); 392 if (!new_op) 393 return -EINVAL; 394 395 new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn; 396 new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn; 397 398 strscpy(new_op->upcall.req.rename.d_old_name, old_dentry->d_name.name); 399 strscpy(new_op->upcall.req.rename.d_new_name, new_dentry->d_name.name); 400 401 ret = service_operation(new_op, 402 "orangefs_rename", 403 get_interruptible_flag(old_dentry->d_inode)); 404 405 gossip_debug(GOSSIP_NAME_DEBUG, 406 "orangefs_rename: got downcall status %d\n", 407 ret); 408 409 if (new_dentry->d_inode) 410 inode_set_ctime_current(d_inode(new_dentry)); 411 412 op_release(new_op); 413 return ret; 414 } 415 416 /* ORANGEFS implementation of VFS inode operations for directories */ 417 const struct inode_operations orangefs_dir_inode_operations = { 418 .lookup = orangefs_lookup, 419 .get_inode_acl = orangefs_get_acl, 420 .set_acl = orangefs_set_acl, 421 .create = orangefs_create, 422 .unlink = orangefs_unlink, 423 .symlink = orangefs_symlink, 424 .mkdir = orangefs_mkdir, 425 .rmdir = orangefs_unlink, 426 .rename = orangefs_rename, 427 .setattr = orangefs_setattr, 428 .getattr = orangefs_getattr, 429 .listxattr = orangefs_listxattr, 430 .permission = orangefs_permission, 431 .update_time = orangefs_update_time, 432 }; 433