Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1 | #include <linux/ceph/ceph_debug.h> |
| 2 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 3 | #include "super.h" |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 4 | #include "mds_client.h" |
| 5 | |
| 6 | #include <linux/ceph/decode.h> |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 7 | |
| 8 | #include <linux/xattr.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 9 | #include <linux/slab.h> |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 10 | |
Alex Elder | 2289190 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 11 | #define XATTR_CEPH_PREFIX "ceph." |
| 12 | #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) |
| 13 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 14 | static bool ceph_is_valid_xattr(const char *name) |
| 15 | { |
Alex Elder | 2289190 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 16 | return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || |
Sage Weil | 1a75627 | 2010-05-11 11:40:25 -0700 | [diff] [blame] | 17 | !strncmp(name, XATTR_SECURITY_PREFIX, |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 18 | XATTR_SECURITY_PREFIX_LEN) || |
| 19 | !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || |
| 20 | !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); |
| 21 | } |
| 22 | |
| 23 | /* |
| 24 | * These define virtual xattrs exposing the recursive directory |
| 25 | * statistics and layout metadata. |
| 26 | */ |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 27 | struct ceph_vxattr { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 28 | char *name; |
| 29 | size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, |
| 30 | size_t size); |
Alex Elder | eb78808 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 31 | bool readonly; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 32 | }; |
| 33 | |
| 34 | /* directories */ |
| 35 | |
| 36 | static size_t ceph_vxattrcb_entries(struct ceph_inode_info *ci, char *val, |
| 37 | size_t size) |
| 38 | { |
| 39 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); |
| 40 | } |
| 41 | |
| 42 | static size_t ceph_vxattrcb_files(struct ceph_inode_info *ci, char *val, |
| 43 | size_t size) |
| 44 | { |
| 45 | return snprintf(val, size, "%lld", ci->i_files); |
| 46 | } |
| 47 | |
| 48 | static size_t ceph_vxattrcb_subdirs(struct ceph_inode_info *ci, char *val, |
| 49 | size_t size) |
| 50 | { |
| 51 | return snprintf(val, size, "%lld", ci->i_subdirs); |
| 52 | } |
| 53 | |
| 54 | static size_t ceph_vxattrcb_rentries(struct ceph_inode_info *ci, char *val, |
| 55 | size_t size) |
| 56 | { |
| 57 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); |
| 58 | } |
| 59 | |
| 60 | static size_t ceph_vxattrcb_rfiles(struct ceph_inode_info *ci, char *val, |
| 61 | size_t size) |
| 62 | { |
| 63 | return snprintf(val, size, "%lld", ci->i_rfiles); |
| 64 | } |
| 65 | |
| 66 | static size_t ceph_vxattrcb_rsubdirs(struct ceph_inode_info *ci, char *val, |
| 67 | size_t size) |
| 68 | { |
| 69 | return snprintf(val, size, "%lld", ci->i_rsubdirs); |
| 70 | } |
| 71 | |
| 72 | static size_t ceph_vxattrcb_rbytes(struct ceph_inode_info *ci, char *val, |
| 73 | size_t size) |
| 74 | { |
| 75 | return snprintf(val, size, "%lld", ci->i_rbytes); |
| 76 | } |
| 77 | |
| 78 | static size_t ceph_vxattrcb_rctime(struct ceph_inode_info *ci, char *val, |
| 79 | size_t size) |
| 80 | { |
| 81 | return snprintf(val, size, "%ld.%ld", (long)ci->i_rctime.tv_sec, |
| 82 | (long)ci->i_rctime.tv_nsec); |
| 83 | } |
| 84 | |
Alex Elder | eb78808 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 85 | #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name |
| 86 | |
| 87 | #define XATTR_NAME_CEPH(_type, _name) \ |
| 88 | { \ |
| 89 | .name = CEPH_XATTR_NAME(_type, _name), \ |
| 90 | .getxattr_cb = ceph_vxattrcb_ ## _name, \ |
| 91 | .readonly = true, \ |
| 92 | } |
| 93 | |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 94 | static struct ceph_vxattr ceph_dir_vxattrs[] = { |
Alex Elder | eb78808 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 95 | XATTR_NAME_CEPH(dir, entries), |
| 96 | XATTR_NAME_CEPH(dir, files), |
| 97 | XATTR_NAME_CEPH(dir, subdirs), |
| 98 | XATTR_NAME_CEPH(dir, rentries), |
| 99 | XATTR_NAME_CEPH(dir, rfiles), |
| 100 | XATTR_NAME_CEPH(dir, rsubdirs), |
| 101 | XATTR_NAME_CEPH(dir, rbytes), |
| 102 | XATTR_NAME_CEPH(dir, rctime), |
| 103 | { 0 } /* Required table terminator */ |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | /* files */ |
| 107 | |
| 108 | static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, |
| 109 | size_t size) |
| 110 | { |
Sage Weil | b195bef | 2009-10-07 10:59:30 -0700 | [diff] [blame] | 111 | int ret; |
| 112 | |
| 113 | ret = snprintf(val, size, |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 114 | "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n", |
| 115 | (unsigned long long)ceph_file_layout_su(ci->i_layout), |
| 116 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), |
| 117 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); |
Sage Weil | b195bef | 2009-10-07 10:59:30 -0700 | [diff] [blame] | 118 | if (ceph_file_layout_pg_preferred(ci->i_layout)) |
| 119 | ret += snprintf(val + ret, size, "preferred_osd=%lld\n", |
| 120 | (unsigned long long)ceph_file_layout_pg_preferred( |
| 121 | ci->i_layout)); |
| 122 | return ret; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 123 | } |
| 124 | |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 125 | static struct ceph_vxattr ceph_file_vxattrs[] = { |
Alex Elder | eb78808 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 126 | XATTR_NAME_CEPH(file, layout), |
Alex Elder | 114fc47 | 2012-01-11 17:41:01 -0800 | [diff] [blame] | 127 | /* The following extended attribute name is deprecated */ |
Alex Elder | eb78808 | 2012-01-23 15:49:28 -0600 | [diff] [blame] | 128 | { |
| 129 | .name = XATTR_CEPH_PREFIX "layout", |
| 130 | .getxattr_cb = ceph_vxattrcb_layout, |
| 131 | .readonly = true, |
| 132 | }, |
| 133 | { 0 } /* Required table terminator */ |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 134 | }; |
| 135 | |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 136 | static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 137 | { |
| 138 | if (S_ISDIR(inode->i_mode)) |
| 139 | return ceph_dir_vxattrs; |
| 140 | else if (S_ISREG(inode->i_mode)) |
| 141 | return ceph_file_vxattrs; |
| 142 | return NULL; |
| 143 | } |
| 144 | |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 145 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 146 | const char *name) |
| 147 | { |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 148 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
Alex Elder | 06476a6 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 149 | |
| 150 | if (vxattr) { |
| 151 | while (vxattr->name) { |
| 152 | if (!strcmp(vxattr->name, name)) |
| 153 | return vxattr; |
| 154 | vxattr++; |
| 155 | } |
| 156 | } |
| 157 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 158 | return NULL; |
| 159 | } |
| 160 | |
| 161 | static int __set_xattr(struct ceph_inode_info *ci, |
| 162 | const char *name, int name_len, |
| 163 | const char *val, int val_len, |
| 164 | int dirty, |
| 165 | int should_free_name, int should_free_val, |
| 166 | struct ceph_inode_xattr **newxattr) |
| 167 | { |
| 168 | struct rb_node **p; |
| 169 | struct rb_node *parent = NULL; |
| 170 | struct ceph_inode_xattr *xattr = NULL; |
| 171 | int c; |
| 172 | int new = 0; |
| 173 | |
| 174 | p = &ci->i_xattrs.index.rb_node; |
| 175 | while (*p) { |
| 176 | parent = *p; |
| 177 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); |
| 178 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); |
| 179 | if (c < 0) |
| 180 | p = &(*p)->rb_left; |
| 181 | else if (c > 0) |
| 182 | p = &(*p)->rb_right; |
| 183 | else { |
| 184 | if (name_len == xattr->name_len) |
| 185 | break; |
| 186 | else if (name_len < xattr->name_len) |
| 187 | p = &(*p)->rb_left; |
| 188 | else |
| 189 | p = &(*p)->rb_right; |
| 190 | } |
| 191 | xattr = NULL; |
| 192 | } |
| 193 | |
| 194 | if (!xattr) { |
| 195 | new = 1; |
| 196 | xattr = *newxattr; |
| 197 | xattr->name = name; |
| 198 | xattr->name_len = name_len; |
| 199 | xattr->should_free_name = should_free_name; |
| 200 | |
| 201 | ci->i_xattrs.count++; |
| 202 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); |
| 203 | } else { |
| 204 | kfree(*newxattr); |
| 205 | *newxattr = NULL; |
| 206 | if (xattr->should_free_val) |
| 207 | kfree((void *)xattr->val); |
| 208 | |
| 209 | if (should_free_name) { |
| 210 | kfree((void *)name); |
| 211 | name = xattr->name; |
| 212 | } |
| 213 | ci->i_xattrs.names_size -= xattr->name_len; |
| 214 | ci->i_xattrs.vals_size -= xattr->val_len; |
| 215 | } |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 216 | ci->i_xattrs.names_size += name_len; |
| 217 | ci->i_xattrs.vals_size += val_len; |
| 218 | if (val) |
| 219 | xattr->val = val; |
| 220 | else |
| 221 | xattr->val = ""; |
| 222 | |
| 223 | xattr->val_len = val_len; |
| 224 | xattr->dirty = dirty; |
| 225 | xattr->should_free_val = (val && should_free_val); |
| 226 | |
| 227 | if (new) { |
| 228 | rb_link_node(&xattr->node, parent, p); |
| 229 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); |
| 230 | dout("__set_xattr_val p=%p\n", p); |
| 231 | } |
| 232 | |
| 233 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", |
| 234 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, |
| 240 | const char *name) |
| 241 | { |
| 242 | struct rb_node **p; |
| 243 | struct rb_node *parent = NULL; |
| 244 | struct ceph_inode_xattr *xattr = NULL; |
Sage Weil | 17db143 | 2011-01-13 15:27:29 -0800 | [diff] [blame] | 245 | int name_len = strlen(name); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 246 | int c; |
| 247 | |
| 248 | p = &ci->i_xattrs.index.rb_node; |
| 249 | while (*p) { |
| 250 | parent = *p; |
| 251 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); |
| 252 | c = strncmp(name, xattr->name, xattr->name_len); |
Sage Weil | 17db143 | 2011-01-13 15:27:29 -0800 | [diff] [blame] | 253 | if (c == 0 && name_len > xattr->name_len) |
| 254 | c = 1; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 255 | if (c < 0) |
| 256 | p = &(*p)->rb_left; |
| 257 | else if (c > 0) |
| 258 | p = &(*p)->rb_right; |
| 259 | else { |
| 260 | dout("__get_xattr %s: found %.*s\n", name, |
| 261 | xattr->val_len, xattr->val); |
| 262 | return xattr; |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | dout("__get_xattr %s: not found\n", name); |
| 267 | |
| 268 | return NULL; |
| 269 | } |
| 270 | |
| 271 | static void __free_xattr(struct ceph_inode_xattr *xattr) |
| 272 | { |
| 273 | BUG_ON(!xattr); |
| 274 | |
| 275 | if (xattr->should_free_name) |
| 276 | kfree((void *)xattr->name); |
| 277 | if (xattr->should_free_val) |
| 278 | kfree((void *)xattr->val); |
| 279 | |
| 280 | kfree(xattr); |
| 281 | } |
| 282 | |
| 283 | static int __remove_xattr(struct ceph_inode_info *ci, |
| 284 | struct ceph_inode_xattr *xattr) |
| 285 | { |
| 286 | if (!xattr) |
| 287 | return -EOPNOTSUPP; |
| 288 | |
| 289 | rb_erase(&xattr->node, &ci->i_xattrs.index); |
| 290 | |
| 291 | if (xattr->should_free_name) |
| 292 | kfree((void *)xattr->name); |
| 293 | if (xattr->should_free_val) |
| 294 | kfree((void *)xattr->val); |
| 295 | |
| 296 | ci->i_xattrs.names_size -= xattr->name_len; |
| 297 | ci->i_xattrs.vals_size -= xattr->val_len; |
| 298 | ci->i_xattrs.count--; |
| 299 | kfree(xattr); |
| 300 | |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | static int __remove_xattr_by_name(struct ceph_inode_info *ci, |
| 305 | const char *name) |
| 306 | { |
| 307 | struct rb_node **p; |
| 308 | struct ceph_inode_xattr *xattr; |
| 309 | int err; |
| 310 | |
| 311 | p = &ci->i_xattrs.index.rb_node; |
| 312 | xattr = __get_xattr(ci, name); |
| 313 | err = __remove_xattr(ci, xattr); |
| 314 | return err; |
| 315 | } |
| 316 | |
| 317 | static char *__copy_xattr_names(struct ceph_inode_info *ci, |
| 318 | char *dest) |
| 319 | { |
| 320 | struct rb_node *p; |
| 321 | struct ceph_inode_xattr *xattr = NULL; |
| 322 | |
| 323 | p = rb_first(&ci->i_xattrs.index); |
| 324 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); |
| 325 | |
| 326 | while (p) { |
| 327 | xattr = rb_entry(p, struct ceph_inode_xattr, node); |
| 328 | memcpy(dest, xattr->name, xattr->name_len); |
| 329 | dest[xattr->name_len] = '\0'; |
| 330 | |
| 331 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, |
| 332 | xattr->name_len, ci->i_xattrs.names_size); |
| 333 | |
| 334 | dest += xattr->name_len + 1; |
| 335 | p = rb_next(p); |
| 336 | } |
| 337 | |
| 338 | return dest; |
| 339 | } |
| 340 | |
| 341 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) |
| 342 | { |
| 343 | struct rb_node *p, *tmp; |
| 344 | struct ceph_inode_xattr *xattr = NULL; |
| 345 | |
| 346 | p = rb_first(&ci->i_xattrs.index); |
| 347 | |
| 348 | dout("__ceph_destroy_xattrs p=%p\n", p); |
| 349 | |
| 350 | while (p) { |
| 351 | xattr = rb_entry(p, struct ceph_inode_xattr, node); |
| 352 | tmp = p; |
| 353 | p = rb_next(tmp); |
| 354 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, |
| 355 | xattr->name_len, xattr->name); |
| 356 | rb_erase(tmp, &ci->i_xattrs.index); |
| 357 | |
| 358 | __free_xattr(xattr); |
| 359 | } |
| 360 | |
| 361 | ci->i_xattrs.names_size = 0; |
| 362 | ci->i_xattrs.vals_size = 0; |
| 363 | ci->i_xattrs.index_version = 0; |
| 364 | ci->i_xattrs.count = 0; |
| 365 | ci->i_xattrs.index = RB_ROOT; |
| 366 | } |
| 367 | |
| 368 | static int __build_xattrs(struct inode *inode) |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 369 | __releases(ci->i_ceph_lock) |
| 370 | __acquires(ci->i_ceph_lock) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 371 | { |
| 372 | u32 namelen; |
| 373 | u32 numattr = 0; |
| 374 | void *p, *end; |
| 375 | u32 len; |
| 376 | const char *name, *val; |
| 377 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 378 | int xattr_version; |
| 379 | struct ceph_inode_xattr **xattrs = NULL; |
Sage Weil | 63ff78b | 2009-11-01 17:51:15 -0800 | [diff] [blame] | 380 | int err = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 381 | int i; |
| 382 | |
| 383 | dout("__build_xattrs() len=%d\n", |
| 384 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); |
| 385 | |
| 386 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) |
| 387 | return 0; /* already built */ |
| 388 | |
| 389 | __ceph_destroy_xattrs(ci); |
| 390 | |
| 391 | start: |
| 392 | /* updated internal xattr rb tree */ |
| 393 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { |
| 394 | p = ci->i_xattrs.blob->vec.iov_base; |
| 395 | end = p + ci->i_xattrs.blob->vec.iov_len; |
| 396 | ceph_decode_32_safe(&p, end, numattr, bad); |
| 397 | xattr_version = ci->i_xattrs.version; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 398 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 399 | |
| 400 | xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), |
| 401 | GFP_NOFS); |
| 402 | err = -ENOMEM; |
| 403 | if (!xattrs) |
| 404 | goto bad_lock; |
| 405 | memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); |
| 406 | for (i = 0; i < numattr; i++) { |
| 407 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), |
| 408 | GFP_NOFS); |
| 409 | if (!xattrs[i]) |
| 410 | goto bad_lock; |
| 411 | } |
| 412 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 413 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 414 | if (ci->i_xattrs.version != xattr_version) { |
| 415 | /* lost a race, retry */ |
| 416 | for (i = 0; i < numattr; i++) |
| 417 | kfree(xattrs[i]); |
| 418 | kfree(xattrs); |
| 419 | goto start; |
| 420 | } |
| 421 | err = -EIO; |
| 422 | while (numattr--) { |
| 423 | ceph_decode_32_safe(&p, end, len, bad); |
| 424 | namelen = len; |
| 425 | name = p; |
| 426 | p += len; |
| 427 | ceph_decode_32_safe(&p, end, len, bad); |
| 428 | val = p; |
| 429 | p += len; |
| 430 | |
| 431 | err = __set_xattr(ci, name, namelen, val, len, |
| 432 | 0, 0, 0, &xattrs[numattr]); |
| 433 | |
| 434 | if (err < 0) |
| 435 | goto bad; |
| 436 | } |
| 437 | kfree(xattrs); |
| 438 | } |
| 439 | ci->i_xattrs.index_version = ci->i_xattrs.version; |
| 440 | ci->i_xattrs.dirty = false; |
| 441 | |
| 442 | return err; |
| 443 | bad_lock: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 444 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 445 | bad: |
| 446 | if (xattrs) { |
| 447 | for (i = 0; i < numattr; i++) |
| 448 | kfree(xattrs[i]); |
| 449 | kfree(xattrs); |
| 450 | } |
| 451 | ci->i_xattrs.names_size = 0; |
| 452 | return err; |
| 453 | } |
| 454 | |
| 455 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, |
| 456 | int val_size) |
| 457 | { |
| 458 | /* |
| 459 | * 4 bytes for the length, and additional 4 bytes per each xattr name, |
| 460 | * 4 bytes per each value |
| 461 | */ |
| 462 | int size = 4 + ci->i_xattrs.count*(4 + 4) + |
| 463 | ci->i_xattrs.names_size + |
| 464 | ci->i_xattrs.vals_size; |
| 465 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", |
| 466 | ci->i_xattrs.count, ci->i_xattrs.names_size, |
| 467 | ci->i_xattrs.vals_size); |
| 468 | |
| 469 | if (name_size) |
| 470 | size += 4 + 4 + name_size + val_size; |
| 471 | |
| 472 | return size; |
| 473 | } |
| 474 | |
| 475 | /* |
| 476 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob |
| 477 | * and swap into place. |
| 478 | */ |
| 479 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) |
| 480 | { |
| 481 | struct rb_node *p; |
| 482 | struct ceph_inode_xattr *xattr = NULL; |
| 483 | void *dest; |
| 484 | |
| 485 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); |
| 486 | if (ci->i_xattrs.dirty) { |
| 487 | int need = __get_required_blob_size(ci, 0, 0); |
| 488 | |
| 489 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); |
| 490 | |
| 491 | p = rb_first(&ci->i_xattrs.index); |
| 492 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; |
| 493 | |
| 494 | ceph_encode_32(&dest, ci->i_xattrs.count); |
| 495 | while (p) { |
| 496 | xattr = rb_entry(p, struct ceph_inode_xattr, node); |
| 497 | |
| 498 | ceph_encode_32(&dest, xattr->name_len); |
| 499 | memcpy(dest, xattr->name, xattr->name_len); |
| 500 | dest += xattr->name_len; |
| 501 | ceph_encode_32(&dest, xattr->val_len); |
| 502 | memcpy(dest, xattr->val, xattr->val_len); |
| 503 | dest += xattr->val_len; |
| 504 | |
| 505 | p = rb_next(p); |
| 506 | } |
| 507 | |
| 508 | /* adjust buffer len; it may be larger than we need */ |
| 509 | ci->i_xattrs.prealloc_blob->vec.iov_len = |
| 510 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; |
| 511 | |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 512 | if (ci->i_xattrs.blob) |
| 513 | ceph_buffer_put(ci->i_xattrs.blob); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 514 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
| 515 | ci->i_xattrs.prealloc_blob = NULL; |
| 516 | ci->i_xattrs.dirty = false; |
Sage Weil | 4a625be | 2010-08-22 15:03:56 -0700 | [diff] [blame] | 517 | ci->i_xattrs.version++; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 518 | } |
| 519 | } |
| 520 | |
| 521 | ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, |
| 522 | size_t size) |
| 523 | { |
| 524 | struct inode *inode = dentry->d_inode; |
| 525 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 526 | int err; |
| 527 | struct ceph_inode_xattr *xattr; |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 528 | struct ceph_vxattr *vxattr = NULL; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 529 | |
| 530 | if (!ceph_is_valid_xattr(name)) |
| 531 | return -ENODATA; |
| 532 | |
| 533 | /* let's see if a virtual xattr was requested */ |
Alex Elder | 06476a6 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 534 | vxattr = ceph_match_vxattr(inode, name); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 535 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 536 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 537 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, |
| 538 | ci->i_xattrs.version, ci->i_xattrs.index_version); |
| 539 | |
| 540 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && |
| 541 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { |
| 542 | goto get_xattr; |
| 543 | } else { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 544 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 545 | /* get xattrs from mds (if we don't already have them) */ |
| 546 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); |
| 547 | if (err) |
| 548 | return err; |
| 549 | } |
| 550 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 551 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 552 | |
| 553 | if (vxattr && vxattr->readonly) { |
| 554 | err = vxattr->getxattr_cb(ci, value, size); |
| 555 | goto out; |
| 556 | } |
| 557 | |
| 558 | err = __build_xattrs(inode); |
| 559 | if (err < 0) |
| 560 | goto out; |
| 561 | |
| 562 | get_xattr: |
| 563 | err = -ENODATA; /* == ENOATTR */ |
| 564 | xattr = __get_xattr(ci, name); |
| 565 | if (!xattr) { |
| 566 | if (vxattr) |
| 567 | err = vxattr->getxattr_cb(ci, value, size); |
| 568 | goto out; |
| 569 | } |
| 570 | |
| 571 | err = -ERANGE; |
| 572 | if (size && size < xattr->val_len) |
| 573 | goto out; |
| 574 | |
| 575 | err = xattr->val_len; |
| 576 | if (size == 0) |
| 577 | goto out; |
| 578 | |
| 579 | memcpy(value, xattr->val, xattr->val_len); |
| 580 | |
| 581 | out: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 582 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 583 | return err; |
| 584 | } |
| 585 | |
| 586 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) |
| 587 | { |
| 588 | struct inode *inode = dentry->d_inode; |
| 589 | struct ceph_inode_info *ci = ceph_inode(inode); |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 590 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 591 | u32 vir_namelen = 0; |
| 592 | u32 namelen; |
| 593 | int err; |
| 594 | u32 len; |
| 595 | int i; |
| 596 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 597 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 598 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
| 599 | ci->i_xattrs.version, ci->i_xattrs.index_version); |
| 600 | |
| 601 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && |
Henry C Chang | bddfa3c | 2010-04-29 09:32:28 -0700 | [diff] [blame] | 602 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 603 | goto list_xattr; |
| 604 | } else { |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 605 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 606 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); |
| 607 | if (err) |
| 608 | return err; |
| 609 | } |
| 610 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 611 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 612 | |
| 613 | err = __build_xattrs(inode); |
| 614 | if (err < 0) |
| 615 | goto out; |
| 616 | |
| 617 | list_xattr: |
| 618 | vir_namelen = 0; |
| 619 | /* include virtual dir xattrs */ |
| 620 | if (vxattrs) |
| 621 | for (i = 0; vxattrs[i].name; i++) |
| 622 | vir_namelen += strlen(vxattrs[i].name) + 1; |
| 623 | /* adding 1 byte per each variable due to the null termination */ |
| 624 | namelen = vir_namelen + ci->i_xattrs.names_size + ci->i_xattrs.count; |
| 625 | err = -ERANGE; |
| 626 | if (size && namelen > size) |
| 627 | goto out; |
| 628 | |
| 629 | err = namelen; |
| 630 | if (size == 0) |
| 631 | goto out; |
| 632 | |
| 633 | names = __copy_xattr_names(ci, names); |
| 634 | |
| 635 | /* virtual xattr names, too */ |
| 636 | if (vxattrs) |
| 637 | for (i = 0; vxattrs[i].name; i++) { |
| 638 | len = sprintf(names, "%s", vxattrs[i].name); |
| 639 | names += len + 1; |
| 640 | } |
| 641 | |
| 642 | out: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 643 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 644 | return err; |
| 645 | } |
| 646 | |
| 647 | static int ceph_sync_setxattr(struct dentry *dentry, const char *name, |
| 648 | const char *value, size_t size, int flags) |
| 649 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 650 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 651 | struct inode *inode = dentry->d_inode; |
| 652 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 653 | struct inode *parent_inode; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 654 | struct ceph_mds_request *req; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 655 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 656 | int err; |
| 657 | int i, nr_pages; |
| 658 | struct page **pages = NULL; |
| 659 | void *kaddr; |
| 660 | |
| 661 | /* copy value into some pages */ |
| 662 | nr_pages = calc_pages_for(0, size); |
| 663 | if (nr_pages) { |
| 664 | pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); |
| 665 | if (!pages) |
| 666 | return -ENOMEM; |
| 667 | err = -ENOMEM; |
| 668 | for (i = 0; i < nr_pages; i++) { |
Yehuda Sadeh | 31459fe | 2010-03-17 13:54:02 -0700 | [diff] [blame] | 669 | pages[i] = __page_cache_alloc(GFP_NOFS); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 670 | if (!pages[i]) { |
| 671 | nr_pages = i; |
| 672 | goto out; |
| 673 | } |
| 674 | kaddr = kmap(pages[i]); |
| 675 | memcpy(kaddr, value + i*PAGE_CACHE_SIZE, |
| 676 | min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | dout("setxattr value=%.*s\n", (int)size, value); |
| 681 | |
| 682 | /* do request */ |
| 683 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, |
| 684 | USE_AUTH_MDS); |
Julia Lawall | 60d8773 | 2009-11-21 12:53:08 +0100 | [diff] [blame] | 685 | if (IS_ERR(req)) { |
| 686 | err = PTR_ERR(req); |
| 687 | goto out; |
| 688 | } |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 689 | req->r_inode = inode; |
| 690 | ihold(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 691 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
| 692 | req->r_num_caps = 1; |
| 693 | req->r_args.setxattr.flags = cpu_to_le32(flags); |
| 694 | req->r_path2 = kstrdup(name, GFP_NOFS); |
| 695 | |
| 696 | req->r_pages = pages; |
| 697 | req->r_num_pages = nr_pages; |
| 698 | req->r_data_len = size; |
| 699 | |
| 700 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 701 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 702 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 703 | iput(parent_inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 704 | ceph_mdsc_put_request(req); |
| 705 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); |
| 706 | |
| 707 | out: |
| 708 | if (pages) { |
| 709 | for (i = 0; i < nr_pages; i++) |
| 710 | __free_page(pages[i]); |
| 711 | kfree(pages); |
| 712 | } |
| 713 | return err; |
| 714 | } |
| 715 | |
| 716 | int ceph_setxattr(struct dentry *dentry, const char *name, |
| 717 | const void *value, size_t size, int flags) |
| 718 | { |
| 719 | struct inode *inode = dentry->d_inode; |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 720 | struct ceph_vxattr *vxattr; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 721 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 722 | int err; |
| 723 | int name_len = strlen(name); |
| 724 | int val_len = size; |
| 725 | char *newname = NULL; |
| 726 | char *newval = NULL; |
| 727 | struct ceph_inode_xattr *xattr = NULL; |
| 728 | int issued; |
| 729 | int required_blob_size; |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 730 | int dirty; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 731 | |
| 732 | if (ceph_snap(inode) != CEPH_NOSNAP) |
| 733 | return -EROFS; |
| 734 | |
| 735 | if (!ceph_is_valid_xattr(name)) |
| 736 | return -EOPNOTSUPP; |
| 737 | |
Alex Elder | 06476a6 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 738 | vxattr = ceph_match_vxattr(inode, name); |
| 739 | if (vxattr && vxattr->readonly) |
| 740 | return -EOPNOTSUPP; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 741 | |
| 742 | /* preallocate memory for xattr name, value, index node */ |
| 743 | err = -ENOMEM; |
Julia Lawall | 61413c2 | 2010-10-17 21:55:21 +0200 | [diff] [blame] | 744 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 745 | if (!newname) |
| 746 | goto out; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 747 | |
| 748 | if (val_len) { |
Alex Elder | b829c19 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 749 | newval = kmemdup(value, val_len, GFP_NOFS); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 750 | if (!newval) |
| 751 | goto out; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); |
| 755 | if (!xattr) |
| 756 | goto out; |
| 757 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 758 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 759 | retry: |
| 760 | issued = __ceph_caps_issued(ci, NULL); |
| 761 | if (!(issued & CEPH_CAP_XATTR_EXCL)) |
| 762 | goto do_sync; |
| 763 | __build_xattrs(inode); |
| 764 | |
| 765 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); |
| 766 | |
| 767 | if (!ci->i_xattrs.prealloc_blob || |
| 768 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { |
| 769 | struct ceph_buffer *blob = NULL; |
| 770 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 771 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 772 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 773 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 774 | if (!blob) |
| 775 | goto out; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 776 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 777 | if (ci->i_xattrs.prealloc_blob) |
| 778 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 779 | ci->i_xattrs.prealloc_blob = blob; |
| 780 | goto retry; |
| 781 | } |
| 782 | |
| 783 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); |
| 784 | err = __set_xattr(ci, newname, name_len, newval, |
| 785 | val_len, 1, 1, 1, &xattr); |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 786 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 787 | ci->i_xattrs.dirty = true; |
| 788 | inode->i_ctime = CURRENT_TIME; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 789 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 790 | if (dirty) |
| 791 | __mark_inode_dirty(inode, dirty); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 792 | return err; |
| 793 | |
| 794 | do_sync: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 795 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 796 | err = ceph_sync_setxattr(dentry, name, value, size, flags); |
| 797 | out: |
| 798 | kfree(newname); |
| 799 | kfree(newval); |
| 800 | kfree(xattr); |
| 801 | return err; |
| 802 | } |
| 803 | |
| 804 | static int ceph_send_removexattr(struct dentry *dentry, const char *name) |
| 805 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 806 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
| 807 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 808 | struct inode *inode = dentry->d_inode; |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 809 | struct inode *parent_inode; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 810 | struct ceph_mds_request *req; |
| 811 | int err; |
| 812 | |
| 813 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, |
| 814 | USE_AUTH_MDS); |
| 815 | if (IS_ERR(req)) |
| 816 | return PTR_ERR(req); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 817 | req->r_inode = inode; |
| 818 | ihold(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 819 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
| 820 | req->r_num_caps = 1; |
| 821 | req->r_path2 = kstrdup(name, GFP_NOFS); |
| 822 | |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 823 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 824 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 825 | iput(parent_inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 826 | ceph_mdsc_put_request(req); |
| 827 | return err; |
| 828 | } |
| 829 | |
| 830 | int ceph_removexattr(struct dentry *dentry, const char *name) |
| 831 | { |
| 832 | struct inode *inode = dentry->d_inode; |
Alex Elder | 881a5fa | 2012-01-23 15:49:28 -0600 | [diff] [blame^] | 833 | struct ceph_vxattr *vxattr; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 834 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 835 | int issued; |
| 836 | int err; |
Alex Elder | 83eb26a | 2012-01-11 17:41:01 -0800 | [diff] [blame] | 837 | int required_blob_size; |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 838 | int dirty; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 839 | |
| 840 | if (ceph_snap(inode) != CEPH_NOSNAP) |
| 841 | return -EROFS; |
| 842 | |
| 843 | if (!ceph_is_valid_xattr(name)) |
| 844 | return -EOPNOTSUPP; |
| 845 | |
Alex Elder | 06476a6 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 846 | vxattr = ceph_match_vxattr(inode, name); |
| 847 | if (vxattr && vxattr->readonly) |
| 848 | return -EOPNOTSUPP; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 849 | |
Alex Elder | 83eb26a | 2012-01-11 17:41:01 -0800 | [diff] [blame] | 850 | err = -ENOMEM; |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 851 | spin_lock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 852 | __build_xattrs(inode); |
Alex Elder | 83eb26a | 2012-01-11 17:41:01 -0800 | [diff] [blame] | 853 | retry: |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 854 | issued = __ceph_caps_issued(ci, NULL); |
| 855 | dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); |
| 856 | |
| 857 | if (!(issued & CEPH_CAP_XATTR_EXCL)) |
| 858 | goto do_sync; |
| 859 | |
Alex Elder | 83eb26a | 2012-01-11 17:41:01 -0800 | [diff] [blame] | 860 | required_blob_size = __get_required_blob_size(ci, 0, 0); |
| 861 | |
| 862 | if (!ci->i_xattrs.prealloc_blob || |
| 863 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { |
| 864 | struct ceph_buffer *blob; |
| 865 | |
| 866 | spin_unlock(&ci->i_ceph_lock); |
| 867 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
| 868 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
| 869 | if (!blob) |
| 870 | goto out; |
| 871 | spin_lock(&ci->i_ceph_lock); |
| 872 | if (ci->i_xattrs.prealloc_blob) |
| 873 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); |
| 874 | ci->i_xattrs.prealloc_blob = blob; |
| 875 | goto retry; |
| 876 | } |
| 877 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 878 | err = __remove_xattr_by_name(ceph_inode(inode), name); |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 879 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 880 | ci->i_xattrs.dirty = true; |
| 881 | inode->i_ctime = CURRENT_TIME; |
| 882 | |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 883 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 884 | if (dirty) |
| 885 | __mark_inode_dirty(inode, dirty); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 886 | return err; |
| 887 | do_sync: |
Sage Weil | be65559 | 2011-11-30 09:47:09 -0800 | [diff] [blame] | 888 | spin_unlock(&ci->i_ceph_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 889 | err = ceph_send_removexattr(dentry, name); |
Alex Elder | 83eb26a | 2012-01-11 17:41:01 -0800 | [diff] [blame] | 890 | out: |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 891 | return err; |
| 892 | } |
| 893 | |