13d14c5d2SYehuda Sadeh #include <linux/ceph/ceph_debug.h> 23d14c5d2SYehuda Sadeh 3355da1ebSSage Weil #include "super.h" 43d14c5d2SYehuda Sadeh #include "mds_client.h" 53d14c5d2SYehuda Sadeh 63d14c5d2SYehuda Sadeh #include <linux/ceph/decode.h> 7355da1ebSSage Weil 8355da1ebSSage Weil #include <linux/xattr.h> 95a0e3ad6STejun Heo #include <linux/slab.h> 10355da1ebSSage Weil 1122891907SAlex Elder #define XATTR_CEPH_PREFIX "ceph." 1222891907SAlex Elder #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) 1322891907SAlex Elder 14355da1ebSSage Weil static bool ceph_is_valid_xattr(const char *name) 15355da1ebSSage Weil { 1622891907SAlex Elder return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || 171a756278SSage Weil !strncmp(name, XATTR_SECURITY_PREFIX, 18355da1ebSSage Weil XATTR_SECURITY_PREFIX_LEN) || 19355da1ebSSage Weil !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || 20355da1ebSSage Weil !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 21355da1ebSSage Weil } 22355da1ebSSage Weil 23355da1ebSSage Weil /* 24355da1ebSSage Weil * These define virtual xattrs exposing the recursive directory 25355da1ebSSage Weil * statistics and layout metadata. 26355da1ebSSage Weil */ 27881a5fa2SAlex Elder struct ceph_vxattr { 28355da1ebSSage Weil char *name; 293ce6cd12SAlex Elder size_t name_size; /* strlen(name) + 1 (for '\0') */ 30355da1ebSSage Weil size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, 31355da1ebSSage Weil size_t size); 328860147aSSage Weil bool readonly, hidden; 33f36e4472SSage Weil bool (*exists_cb)(struct ceph_inode_info *ci); 34355da1ebSSage Weil }; 35355da1ebSSage Weil 36355da1ebSSage Weil /* directories */ 37355da1ebSSage Weil 38aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, 39355da1ebSSage Weil size_t size) 40355da1ebSSage Weil { 41355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); 42355da1ebSSage Weil } 43355da1ebSSage Weil 44aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, 45355da1ebSSage Weil size_t size) 46355da1ebSSage Weil { 47355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files); 48355da1ebSSage Weil } 49355da1ebSSage Weil 50aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, 51355da1ebSSage Weil size_t size) 52355da1ebSSage Weil { 53355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_subdirs); 54355da1ebSSage Weil } 55355da1ebSSage Weil 56aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, 57355da1ebSSage Weil size_t size) 58355da1ebSSage Weil { 59355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); 60355da1ebSSage Weil } 61355da1ebSSage Weil 62aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, 63355da1ebSSage Weil size_t size) 64355da1ebSSage Weil { 65355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles); 66355da1ebSSage Weil } 67355da1ebSSage Weil 68aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, 69355da1ebSSage Weil size_t size) 70355da1ebSSage Weil { 71355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rsubdirs); 72355da1ebSSage Weil } 73355da1ebSSage Weil 74aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, 75355da1ebSSage Weil size_t size) 76355da1ebSSage Weil { 77355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rbytes); 78355da1ebSSage Weil } 79355da1ebSSage Weil 80aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, 81355da1ebSSage Weil size_t size) 82355da1ebSSage Weil { 833489b42aSAlex Elder return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, 84355da1ebSSage Weil (long)ci->i_rctime.tv_nsec); 85355da1ebSSage Weil } 86355da1ebSSage Weil 87eb788084SAlex Elder #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name 88eb788084SAlex Elder 89eb788084SAlex Elder #define XATTR_NAME_CEPH(_type, _name) \ 90eb788084SAlex Elder { \ 91eb788084SAlex Elder .name = CEPH_XATTR_NAME(_type, _name), \ 923ce6cd12SAlex Elder .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ 93aa4066edSAlex Elder .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ 94eb788084SAlex Elder .readonly = true, \ 958860147aSSage Weil .hidden = false, \ 96f36e4472SSage Weil .exists_cb = NULL, \ 97eb788084SAlex Elder } 98eb788084SAlex Elder 99881a5fa2SAlex Elder static struct ceph_vxattr ceph_dir_vxattrs[] = { 100eb788084SAlex Elder XATTR_NAME_CEPH(dir, entries), 101eb788084SAlex Elder XATTR_NAME_CEPH(dir, files), 102eb788084SAlex Elder XATTR_NAME_CEPH(dir, subdirs), 103eb788084SAlex Elder XATTR_NAME_CEPH(dir, rentries), 104eb788084SAlex Elder XATTR_NAME_CEPH(dir, rfiles), 105eb788084SAlex Elder XATTR_NAME_CEPH(dir, rsubdirs), 106eb788084SAlex Elder XATTR_NAME_CEPH(dir, rbytes), 107eb788084SAlex Elder XATTR_NAME_CEPH(dir, rctime), 108eb788084SAlex Elder { 0 } /* Required table terminator */ 109355da1ebSSage Weil }; 1103ce6cd12SAlex Elder static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ 111355da1ebSSage Weil 112355da1ebSSage Weil /* files */ 113355da1ebSSage Weil 114aa4066edSAlex Elder static size_t ceph_vxattrcb_file_layout(struct ceph_inode_info *ci, char *val, 115355da1ebSSage Weil size_t size) 116355da1ebSSage Weil { 117b195befdSSage Weil int ret; 118b195befdSSage Weil 119b195befdSSage Weil ret = snprintf(val, size, 120355da1ebSSage Weil "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n", 121355da1ebSSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 122355da1ebSSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 123355da1ebSSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); 124b195befdSSage Weil return ret; 125355da1ebSSage Weil } 126355da1ebSSage Weil 127881a5fa2SAlex Elder static struct ceph_vxattr ceph_file_vxattrs[] = { 128eb788084SAlex Elder XATTR_NAME_CEPH(file, layout), 129eb788084SAlex Elder { 0 } /* Required table terminator */ 130355da1ebSSage Weil }; 1313ce6cd12SAlex Elder static size_t ceph_file_vxattrs_name_size; /* total size of all names */ 132355da1ebSSage Weil 133881a5fa2SAlex Elder static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) 134355da1ebSSage Weil { 135355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 136355da1ebSSage Weil return ceph_dir_vxattrs; 137355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 138355da1ebSSage Weil return ceph_file_vxattrs; 139355da1ebSSage Weil return NULL; 140355da1ebSSage Weil } 141355da1ebSSage Weil 1423ce6cd12SAlex Elder static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) 1433ce6cd12SAlex Elder { 1443ce6cd12SAlex Elder if (vxattrs == ceph_dir_vxattrs) 1453ce6cd12SAlex Elder return ceph_dir_vxattrs_name_size; 1463ce6cd12SAlex Elder if (vxattrs == ceph_file_vxattrs) 1473ce6cd12SAlex Elder return ceph_file_vxattrs_name_size; 1483ce6cd12SAlex Elder BUG(); 1493ce6cd12SAlex Elder 1503ce6cd12SAlex Elder return 0; 1513ce6cd12SAlex Elder } 1523ce6cd12SAlex Elder 1533ce6cd12SAlex Elder /* 1543ce6cd12SAlex Elder * Compute the aggregate size (including terminating '\0') of all 1553ce6cd12SAlex Elder * virtual extended attribute names in the given vxattr table. 1563ce6cd12SAlex Elder */ 1573ce6cd12SAlex Elder static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) 1583ce6cd12SAlex Elder { 1593ce6cd12SAlex Elder struct ceph_vxattr *vxattr; 1603ce6cd12SAlex Elder size_t size = 0; 1613ce6cd12SAlex Elder 1623ce6cd12SAlex Elder for (vxattr = vxattrs; vxattr->name; vxattr++) 1638860147aSSage Weil if (!vxattr->hidden) 1643ce6cd12SAlex Elder size += vxattr->name_size; 1653ce6cd12SAlex Elder 1663ce6cd12SAlex Elder return size; 1673ce6cd12SAlex Elder } 1683ce6cd12SAlex Elder 1693ce6cd12SAlex Elder /* Routines called at initialization and exit time */ 1703ce6cd12SAlex Elder 1713ce6cd12SAlex Elder void __init ceph_xattr_init(void) 1723ce6cd12SAlex Elder { 1733ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); 1743ce6cd12SAlex Elder ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); 1753ce6cd12SAlex Elder } 1763ce6cd12SAlex Elder 1773ce6cd12SAlex Elder void ceph_xattr_exit(void) 1783ce6cd12SAlex Elder { 1793ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = 0; 1803ce6cd12SAlex Elder ceph_file_vxattrs_name_size = 0; 1813ce6cd12SAlex Elder } 1823ce6cd12SAlex Elder 183881a5fa2SAlex Elder static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, 184355da1ebSSage Weil const char *name) 185355da1ebSSage Weil { 186881a5fa2SAlex Elder struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); 18706476a69SAlex Elder 18806476a69SAlex Elder if (vxattr) { 18906476a69SAlex Elder while (vxattr->name) { 19006476a69SAlex Elder if (!strcmp(vxattr->name, name)) 191355da1ebSSage Weil return vxattr; 192355da1ebSSage Weil vxattr++; 19306476a69SAlex Elder } 19406476a69SAlex Elder } 19506476a69SAlex Elder 196355da1ebSSage Weil return NULL; 197355da1ebSSage Weil } 198355da1ebSSage Weil 199355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 200355da1ebSSage Weil const char *name, int name_len, 201355da1ebSSage Weil const char *val, int val_len, 202355da1ebSSage Weil int dirty, 203355da1ebSSage Weil int should_free_name, int should_free_val, 204355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 205355da1ebSSage Weil { 206355da1ebSSage Weil struct rb_node **p; 207355da1ebSSage Weil struct rb_node *parent = NULL; 208355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 209355da1ebSSage Weil int c; 210355da1ebSSage Weil int new = 0; 211355da1ebSSage Weil 212355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 213355da1ebSSage Weil while (*p) { 214355da1ebSSage Weil parent = *p; 215355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 216355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 217355da1ebSSage Weil if (c < 0) 218355da1ebSSage Weil p = &(*p)->rb_left; 219355da1ebSSage Weil else if (c > 0) 220355da1ebSSage Weil p = &(*p)->rb_right; 221355da1ebSSage Weil else { 222355da1ebSSage Weil if (name_len == xattr->name_len) 223355da1ebSSage Weil break; 224355da1ebSSage Weil else if (name_len < xattr->name_len) 225355da1ebSSage Weil p = &(*p)->rb_left; 226355da1ebSSage Weil else 227355da1ebSSage Weil p = &(*p)->rb_right; 228355da1ebSSage Weil } 229355da1ebSSage Weil xattr = NULL; 230355da1ebSSage Weil } 231355da1ebSSage Weil 232355da1ebSSage Weil if (!xattr) { 233355da1ebSSage Weil new = 1; 234355da1ebSSage Weil xattr = *newxattr; 235355da1ebSSage Weil xattr->name = name; 236355da1ebSSage Weil xattr->name_len = name_len; 237355da1ebSSage Weil xattr->should_free_name = should_free_name; 238355da1ebSSage Weil 239355da1ebSSage Weil ci->i_xattrs.count++; 240355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 241355da1ebSSage Weil } else { 242355da1ebSSage Weil kfree(*newxattr); 243355da1ebSSage Weil *newxattr = NULL; 244355da1ebSSage Weil if (xattr->should_free_val) 245355da1ebSSage Weil kfree((void *)xattr->val); 246355da1ebSSage Weil 247355da1ebSSage Weil if (should_free_name) { 248355da1ebSSage Weil kfree((void *)name); 249355da1ebSSage Weil name = xattr->name; 250355da1ebSSage Weil } 251355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 252355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 253355da1ebSSage Weil } 254355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 255355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 256355da1ebSSage Weil if (val) 257355da1ebSSage Weil xattr->val = val; 258355da1ebSSage Weil else 259355da1ebSSage Weil xattr->val = ""; 260355da1ebSSage Weil 261355da1ebSSage Weil xattr->val_len = val_len; 262355da1ebSSage Weil xattr->dirty = dirty; 263355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 264355da1ebSSage Weil 265355da1ebSSage Weil if (new) { 266355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 267355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 268355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 269355da1ebSSage Weil } 270355da1ebSSage Weil 271355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 272355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 273355da1ebSSage Weil 274355da1ebSSage Weil return 0; 275355da1ebSSage Weil } 276355da1ebSSage Weil 277355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 278355da1ebSSage Weil const char *name) 279355da1ebSSage Weil { 280355da1ebSSage Weil struct rb_node **p; 281355da1ebSSage Weil struct rb_node *parent = NULL; 282355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 28317db143fSSage Weil int name_len = strlen(name); 284355da1ebSSage Weil int c; 285355da1ebSSage Weil 286355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 287355da1ebSSage Weil while (*p) { 288355da1ebSSage Weil parent = *p; 289355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 290355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 29117db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 29217db143fSSage Weil c = 1; 293355da1ebSSage Weil if (c < 0) 294355da1ebSSage Weil p = &(*p)->rb_left; 295355da1ebSSage Weil else if (c > 0) 296355da1ebSSage Weil p = &(*p)->rb_right; 297355da1ebSSage Weil else { 298355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 299355da1ebSSage Weil xattr->val_len, xattr->val); 300355da1ebSSage Weil return xattr; 301355da1ebSSage Weil } 302355da1ebSSage Weil } 303355da1ebSSage Weil 304355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 305355da1ebSSage Weil 306355da1ebSSage Weil return NULL; 307355da1ebSSage Weil } 308355da1ebSSage Weil 309355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 310355da1ebSSage Weil { 311355da1ebSSage Weil BUG_ON(!xattr); 312355da1ebSSage Weil 313355da1ebSSage Weil if (xattr->should_free_name) 314355da1ebSSage Weil kfree((void *)xattr->name); 315355da1ebSSage Weil if (xattr->should_free_val) 316355da1ebSSage Weil kfree((void *)xattr->val); 317355da1ebSSage Weil 318355da1ebSSage Weil kfree(xattr); 319355da1ebSSage Weil } 320355da1ebSSage Weil 321355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 322355da1ebSSage Weil struct ceph_inode_xattr *xattr) 323355da1ebSSage Weil { 324355da1ebSSage Weil if (!xattr) 325355da1ebSSage Weil return -EOPNOTSUPP; 326355da1ebSSage Weil 327355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 328355da1ebSSage Weil 329355da1ebSSage Weil if (xattr->should_free_name) 330355da1ebSSage Weil kfree((void *)xattr->name); 331355da1ebSSage Weil if (xattr->should_free_val) 332355da1ebSSage Weil kfree((void *)xattr->val); 333355da1ebSSage Weil 334355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 335355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 336355da1ebSSage Weil ci->i_xattrs.count--; 337355da1ebSSage Weil kfree(xattr); 338355da1ebSSage Weil 339355da1ebSSage Weil return 0; 340355da1ebSSage Weil } 341355da1ebSSage Weil 342355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 343355da1ebSSage Weil const char *name) 344355da1ebSSage Weil { 345355da1ebSSage Weil struct rb_node **p; 346355da1ebSSage Weil struct ceph_inode_xattr *xattr; 347355da1ebSSage Weil int err; 348355da1ebSSage Weil 349355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 350355da1ebSSage Weil xattr = __get_xattr(ci, name); 351355da1ebSSage Weil err = __remove_xattr(ci, xattr); 352355da1ebSSage Weil return err; 353355da1ebSSage Weil } 354355da1ebSSage Weil 355355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 356355da1ebSSage Weil char *dest) 357355da1ebSSage Weil { 358355da1ebSSage Weil struct rb_node *p; 359355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 360355da1ebSSage Weil 361355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 362355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 363355da1ebSSage Weil 364355da1ebSSage Weil while (p) { 365355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 366355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 367355da1ebSSage Weil dest[xattr->name_len] = '\0'; 368355da1ebSSage Weil 369355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 370355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 371355da1ebSSage Weil 372355da1ebSSage Weil dest += xattr->name_len + 1; 373355da1ebSSage Weil p = rb_next(p); 374355da1ebSSage Weil } 375355da1ebSSage Weil 376355da1ebSSage Weil return dest; 377355da1ebSSage Weil } 378355da1ebSSage Weil 379355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 380355da1ebSSage Weil { 381355da1ebSSage Weil struct rb_node *p, *tmp; 382355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 383355da1ebSSage Weil 384355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 385355da1ebSSage Weil 386355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 387355da1ebSSage Weil 388355da1ebSSage Weil while (p) { 389355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 390355da1ebSSage Weil tmp = p; 391355da1ebSSage Weil p = rb_next(tmp); 392355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 393355da1ebSSage Weil xattr->name_len, xattr->name); 394355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 395355da1ebSSage Weil 396355da1ebSSage Weil __free_xattr(xattr); 397355da1ebSSage Weil } 398355da1ebSSage Weil 399355da1ebSSage Weil ci->i_xattrs.names_size = 0; 400355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 401355da1ebSSage Weil ci->i_xattrs.index_version = 0; 402355da1ebSSage Weil ci->i_xattrs.count = 0; 403355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 404355da1ebSSage Weil } 405355da1ebSSage Weil 406355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 407be655596SSage Weil __releases(ci->i_ceph_lock) 408be655596SSage Weil __acquires(ci->i_ceph_lock) 409355da1ebSSage Weil { 410355da1ebSSage Weil u32 namelen; 411355da1ebSSage Weil u32 numattr = 0; 412355da1ebSSage Weil void *p, *end; 413355da1ebSSage Weil u32 len; 414355da1ebSSage Weil const char *name, *val; 415355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 416355da1ebSSage Weil int xattr_version; 417355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 41863ff78b2SSage Weil int err = 0; 419355da1ebSSage Weil int i; 420355da1ebSSage Weil 421355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 422355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 423355da1ebSSage Weil 424355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 425355da1ebSSage Weil return 0; /* already built */ 426355da1ebSSage Weil 427355da1ebSSage Weil __ceph_destroy_xattrs(ci); 428355da1ebSSage Weil 429355da1ebSSage Weil start: 430355da1ebSSage Weil /* updated internal xattr rb tree */ 431355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 432355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 433355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 434355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 435355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 436be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 437355da1ebSSage Weil 438355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 439355da1ebSSage Weil GFP_NOFS); 440355da1ebSSage Weil err = -ENOMEM; 441355da1ebSSage Weil if (!xattrs) 442355da1ebSSage Weil goto bad_lock; 443355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 444355da1ebSSage Weil for (i = 0; i < numattr; i++) { 445355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 446355da1ebSSage Weil GFP_NOFS); 447355da1ebSSage Weil if (!xattrs[i]) 448355da1ebSSage Weil goto bad_lock; 449355da1ebSSage Weil } 450355da1ebSSage Weil 451be655596SSage Weil spin_lock(&ci->i_ceph_lock); 452355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 453355da1ebSSage Weil /* lost a race, retry */ 454355da1ebSSage Weil for (i = 0; i < numattr; i++) 455355da1ebSSage Weil kfree(xattrs[i]); 456355da1ebSSage Weil kfree(xattrs); 45721ec6ffaSAlan Cox xattrs = NULL; 458355da1ebSSage Weil goto start; 459355da1ebSSage Weil } 460355da1ebSSage Weil err = -EIO; 461355da1ebSSage Weil while (numattr--) { 462355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 463355da1ebSSage Weil namelen = len; 464355da1ebSSage Weil name = p; 465355da1ebSSage Weil p += len; 466355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 467355da1ebSSage Weil val = p; 468355da1ebSSage Weil p += len; 469355da1ebSSage Weil 470355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 471355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 472355da1ebSSage Weil 473355da1ebSSage Weil if (err < 0) 474355da1ebSSage Weil goto bad; 475355da1ebSSage Weil } 476355da1ebSSage Weil kfree(xattrs); 477355da1ebSSage Weil } 478355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 479355da1ebSSage Weil ci->i_xattrs.dirty = false; 480355da1ebSSage Weil 481355da1ebSSage Weil return err; 482355da1ebSSage Weil bad_lock: 483be655596SSage Weil spin_lock(&ci->i_ceph_lock); 484355da1ebSSage Weil bad: 485355da1ebSSage Weil if (xattrs) { 486355da1ebSSage Weil for (i = 0; i < numattr; i++) 487355da1ebSSage Weil kfree(xattrs[i]); 488355da1ebSSage Weil kfree(xattrs); 489355da1ebSSage Weil } 490355da1ebSSage Weil ci->i_xattrs.names_size = 0; 491355da1ebSSage Weil return err; 492355da1ebSSage Weil } 493355da1ebSSage Weil 494355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 495355da1ebSSage Weil int val_size) 496355da1ebSSage Weil { 497355da1ebSSage Weil /* 498355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 499355da1ebSSage Weil * 4 bytes per each value 500355da1ebSSage Weil */ 501355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 502355da1ebSSage Weil ci->i_xattrs.names_size + 503355da1ebSSage Weil ci->i_xattrs.vals_size; 504355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 505355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 506355da1ebSSage Weil ci->i_xattrs.vals_size); 507355da1ebSSage Weil 508355da1ebSSage Weil if (name_size) 509355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 510355da1ebSSage Weil 511355da1ebSSage Weil return size; 512355da1ebSSage Weil } 513355da1ebSSage Weil 514355da1ebSSage Weil /* 515355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 516355da1ebSSage Weil * and swap into place. 517355da1ebSSage Weil */ 518355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 519355da1ebSSage Weil { 520355da1ebSSage Weil struct rb_node *p; 521355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 522355da1ebSSage Weil void *dest; 523355da1ebSSage Weil 524355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 525355da1ebSSage Weil if (ci->i_xattrs.dirty) { 526355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 527355da1ebSSage Weil 528355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 529355da1ebSSage Weil 530355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 531355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 532355da1ebSSage Weil 533355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 534355da1ebSSage Weil while (p) { 535355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 536355da1ebSSage Weil 537355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 538355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 539355da1ebSSage Weil dest += xattr->name_len; 540355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 541355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 542355da1ebSSage Weil dest += xattr->val_len; 543355da1ebSSage Weil 544355da1ebSSage Weil p = rb_next(p); 545355da1ebSSage Weil } 546355da1ebSSage Weil 547355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 548355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 549355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 550355da1ebSSage Weil 551b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 552355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 553355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 554355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 555355da1ebSSage Weil ci->i_xattrs.dirty = false; 5564a625be4SSage Weil ci->i_xattrs.version++; 557355da1ebSSage Weil } 558355da1ebSSage Weil } 559355da1ebSSage Weil 560355da1ebSSage Weil ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 561355da1ebSSage Weil size_t size) 562355da1ebSSage Weil { 563355da1ebSSage Weil struct inode *inode = dentry->d_inode; 564355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 565355da1ebSSage Weil int err; 566355da1ebSSage Weil struct ceph_inode_xattr *xattr; 567881a5fa2SAlex Elder struct ceph_vxattr *vxattr = NULL; 568355da1ebSSage Weil 569355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 570355da1ebSSage Weil return -ENODATA; 571355da1ebSSage Weil 572be655596SSage Weil spin_lock(&ci->i_ceph_lock); 573355da1ebSSage Weil dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 574355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 575355da1ebSSage Weil 5760bee82fbSSage Weil /* let's see if a virtual xattr was requested */ 5770bee82fbSSage Weil vxattr = ceph_match_vxattr(inode, name); 5780bee82fbSSage Weil if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { 5790bee82fbSSage Weil err = vxattr->getxattr_cb(ci, value, size); 5800bee82fbSSage Weil goto out; 5810bee82fbSSage Weil } 5820bee82fbSSage Weil 583355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 584355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 585355da1ebSSage Weil goto get_xattr; 586355da1ebSSage Weil } else { 587be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 588355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 589355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 590355da1ebSSage Weil if (err) 591355da1ebSSage Weil return err; 592355da1ebSSage Weil } 593355da1ebSSage Weil 594be655596SSage Weil spin_lock(&ci->i_ceph_lock); 595355da1ebSSage Weil 596355da1ebSSage Weil err = __build_xattrs(inode); 597355da1ebSSage Weil if (err < 0) 598355da1ebSSage Weil goto out; 599355da1ebSSage Weil 600355da1ebSSage Weil get_xattr: 601355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 602355da1ebSSage Weil xattr = __get_xattr(ci, name); 6030bee82fbSSage Weil if (!xattr) 604355da1ebSSage Weil goto out; 605355da1ebSSage Weil 606355da1ebSSage Weil err = -ERANGE; 607355da1ebSSage Weil if (size && size < xattr->val_len) 608355da1ebSSage Weil goto out; 609355da1ebSSage Weil 610355da1ebSSage Weil err = xattr->val_len; 611355da1ebSSage Weil if (size == 0) 612355da1ebSSage Weil goto out; 613355da1ebSSage Weil 614355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 615355da1ebSSage Weil 616355da1ebSSage Weil out: 617be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 618355da1ebSSage Weil return err; 619355da1ebSSage Weil } 620355da1ebSSage Weil 621355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 622355da1ebSSage Weil { 623355da1ebSSage Weil struct inode *inode = dentry->d_inode; 624355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 625881a5fa2SAlex Elder struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); 626355da1ebSSage Weil u32 vir_namelen = 0; 627355da1ebSSage Weil u32 namelen; 628355da1ebSSage Weil int err; 629355da1ebSSage Weil u32 len; 630355da1ebSSage Weil int i; 631355da1ebSSage Weil 632be655596SSage Weil spin_lock(&ci->i_ceph_lock); 633355da1ebSSage Weil dout("listxattr %p ver=%lld index_ver=%lld\n", inode, 634355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 635355da1ebSSage Weil 636355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 637bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 638355da1ebSSage Weil goto list_xattr; 639355da1ebSSage Weil } else { 640be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 641355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 642355da1ebSSage Weil if (err) 643355da1ebSSage Weil return err; 644355da1ebSSage Weil } 645355da1ebSSage Weil 646be655596SSage Weil spin_lock(&ci->i_ceph_lock); 647355da1ebSSage Weil 648355da1ebSSage Weil err = __build_xattrs(inode); 649355da1ebSSage Weil if (err < 0) 650355da1ebSSage Weil goto out; 651355da1ebSSage Weil 652355da1ebSSage Weil list_xattr: 6533ce6cd12SAlex Elder /* 6543ce6cd12SAlex Elder * Start with virtual dir xattr names (if any) (including 6553ce6cd12SAlex Elder * terminating '\0' characters for each). 6563ce6cd12SAlex Elder */ 6573ce6cd12SAlex Elder vir_namelen = ceph_vxattrs_name_size(vxattrs); 6583ce6cd12SAlex Elder 659355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 660*b65917ddSSage Weil namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; 661355da1ebSSage Weil err = -ERANGE; 662*b65917ddSSage Weil if (size && vir_namelen + namelen > size) 663355da1ebSSage Weil goto out; 664355da1ebSSage Weil 665*b65917ddSSage Weil err = namelen + vir_namelen; 666355da1ebSSage Weil if (size == 0) 667355da1ebSSage Weil goto out; 668355da1ebSSage Weil 669355da1ebSSage Weil names = __copy_xattr_names(ci, names); 670355da1ebSSage Weil 671355da1ebSSage Weil /* virtual xattr names, too */ 672*b65917ddSSage Weil err = namelen; 673*b65917ddSSage Weil if (vxattrs) { 674355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 675*b65917ddSSage Weil if (!vxattrs[i].hidden && 676*b65917ddSSage Weil !(vxattrs[i].exists_cb && 677*b65917ddSSage Weil !vxattrs[i].exists_cb(ci))) { 678355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 679355da1ebSSage Weil names += len + 1; 680*b65917ddSSage Weil err += len + 1; 681*b65917ddSSage Weil } 682*b65917ddSSage Weil } 683355da1ebSSage Weil } 684355da1ebSSage Weil 685355da1ebSSage Weil out: 686be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 687355da1ebSSage Weil return err; 688355da1ebSSage Weil } 689355da1ebSSage Weil 690355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 691355da1ebSSage Weil const char *value, size_t size, int flags) 692355da1ebSSage Weil { 6933d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 694355da1ebSSage Weil struct inode *inode = dentry->d_inode; 695355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 6965f21c96dSSage Weil struct inode *parent_inode; 697355da1ebSSage Weil struct ceph_mds_request *req; 6983d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 699355da1ebSSage Weil int err; 700355da1ebSSage Weil int i, nr_pages; 701355da1ebSSage Weil struct page **pages = NULL; 702355da1ebSSage Weil void *kaddr; 703355da1ebSSage Weil 704355da1ebSSage Weil /* copy value into some pages */ 705355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 706355da1ebSSage Weil if (nr_pages) { 707355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 708355da1ebSSage Weil if (!pages) 709355da1ebSSage Weil return -ENOMEM; 710355da1ebSSage Weil err = -ENOMEM; 711355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 71231459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 713355da1ebSSage Weil if (!pages[i]) { 714355da1ebSSage Weil nr_pages = i; 715355da1ebSSage Weil goto out; 716355da1ebSSage Weil } 717355da1ebSSage Weil kaddr = kmap(pages[i]); 718355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 719355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 720355da1ebSSage Weil } 721355da1ebSSage Weil } 722355da1ebSSage Weil 723355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 724355da1ebSSage Weil 725355da1ebSSage Weil /* do request */ 726355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 727355da1ebSSage Weil USE_AUTH_MDS); 72860d87733SJulia Lawall if (IS_ERR(req)) { 72960d87733SJulia Lawall err = PTR_ERR(req); 73060d87733SJulia Lawall goto out; 73160d87733SJulia Lawall } 73270b666c3SSage Weil req->r_inode = inode; 73370b666c3SSage Weil ihold(inode); 734355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 735355da1ebSSage Weil req->r_num_caps = 1; 736355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 737355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 738355da1ebSSage Weil 739355da1ebSSage Weil req->r_pages = pages; 740355da1ebSSage Weil req->r_num_pages = nr_pages; 741355da1ebSSage Weil req->r_data_len = size; 742355da1ebSSage Weil 743355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 7445f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 745355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 7465f21c96dSSage Weil iput(parent_inode); 747355da1ebSSage Weil ceph_mdsc_put_request(req); 748355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 749355da1ebSSage Weil 750355da1ebSSage Weil out: 751355da1ebSSage Weil if (pages) { 752355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 753355da1ebSSage Weil __free_page(pages[i]); 754355da1ebSSage Weil kfree(pages); 755355da1ebSSage Weil } 756355da1ebSSage Weil return err; 757355da1ebSSage Weil } 758355da1ebSSage Weil 759355da1ebSSage Weil int ceph_setxattr(struct dentry *dentry, const char *name, 760355da1ebSSage Weil const void *value, size_t size, int flags) 761355da1ebSSage Weil { 762355da1ebSSage Weil struct inode *inode = dentry->d_inode; 763881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 764355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 76518fa8b3fSAlex Elder int issued; 766355da1ebSSage Weil int err; 76718fa8b3fSAlex Elder int dirty; 768355da1ebSSage Weil int name_len = strlen(name); 769355da1ebSSage Weil int val_len = size; 770355da1ebSSage Weil char *newname = NULL; 771355da1ebSSage Weil char *newval = NULL; 772355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 773355da1ebSSage Weil int required_blob_size; 774355da1ebSSage Weil 775355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 776355da1ebSSage Weil return -EROFS; 777355da1ebSSage Weil 778355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 779355da1ebSSage Weil return -EOPNOTSUPP; 780355da1ebSSage Weil 78106476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 782355da1ebSSage Weil if (vxattr && vxattr->readonly) 783355da1ebSSage Weil return -EOPNOTSUPP; 784355da1ebSSage Weil 7853adf654dSSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 7863adf654dSSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 7873adf654dSSage Weil goto do_sync_unlocked; 7883adf654dSSage Weil 789355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 790355da1ebSSage Weil err = -ENOMEM; 79161413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 792355da1ebSSage Weil if (!newname) 793355da1ebSSage Weil goto out; 794355da1ebSSage Weil 795355da1ebSSage Weil if (val_len) { 796b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 797355da1ebSSage Weil if (!newval) 798355da1ebSSage Weil goto out; 799355da1ebSSage Weil } 800355da1ebSSage Weil 801355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 802355da1ebSSage Weil if (!xattr) 803355da1ebSSage Weil goto out; 804355da1ebSSage Weil 805be655596SSage Weil spin_lock(&ci->i_ceph_lock); 806355da1ebSSage Weil retry: 807355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 80818fa8b3fSAlex Elder dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 809355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 810355da1ebSSage Weil goto do_sync; 811355da1ebSSage Weil __build_xattrs(inode); 812355da1ebSSage Weil 813355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 814355da1ebSSage Weil 815355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 816355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 81718fa8b3fSAlex Elder struct ceph_buffer *blob; 818355da1ebSSage Weil 819be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 820355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 821b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 822355da1ebSSage Weil if (!blob) 823355da1ebSSage Weil goto out; 824be655596SSage Weil spin_lock(&ci->i_ceph_lock); 825b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 826355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 827355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 828355da1ebSSage Weil goto retry; 829355da1ebSSage Weil } 830355da1ebSSage Weil 831355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 832355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 83318fa8b3fSAlex Elder 834fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 835355da1ebSSage Weil ci->i_xattrs.dirty = true; 836355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 83718fa8b3fSAlex Elder 838be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 839fca65b4aSSage Weil if (dirty) 840fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 841355da1ebSSage Weil return err; 842355da1ebSSage Weil 843355da1ebSSage Weil do_sync: 844be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 8453adf654dSSage Weil do_sync_unlocked: 846355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 847355da1ebSSage Weil out: 848355da1ebSSage Weil kfree(newname); 849355da1ebSSage Weil kfree(newval); 850355da1ebSSage Weil kfree(xattr); 851355da1ebSSage Weil return err; 852355da1ebSSage Weil } 853355da1ebSSage Weil 854355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 855355da1ebSSage Weil { 8563d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 8573d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 858355da1ebSSage Weil struct inode *inode = dentry->d_inode; 8595f21c96dSSage Weil struct inode *parent_inode; 860355da1ebSSage Weil struct ceph_mds_request *req; 861355da1ebSSage Weil int err; 862355da1ebSSage Weil 863355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 864355da1ebSSage Weil USE_AUTH_MDS); 865355da1ebSSage Weil if (IS_ERR(req)) 866355da1ebSSage Weil return PTR_ERR(req); 86770b666c3SSage Weil req->r_inode = inode; 86870b666c3SSage Weil ihold(inode); 869355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 870355da1ebSSage Weil req->r_num_caps = 1; 871355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 872355da1ebSSage Weil 8735f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 874355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 8755f21c96dSSage Weil iput(parent_inode); 876355da1ebSSage Weil ceph_mdsc_put_request(req); 877355da1ebSSage Weil return err; 878355da1ebSSage Weil } 879355da1ebSSage Weil 880355da1ebSSage Weil int ceph_removexattr(struct dentry *dentry, const char *name) 881355da1ebSSage Weil { 882355da1ebSSage Weil struct inode *inode = dentry->d_inode; 883881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 884355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 885355da1ebSSage Weil int issued; 886355da1ebSSage Weil int err; 88783eb26afSAlex Elder int required_blob_size; 888fca65b4aSSage Weil int dirty; 889355da1ebSSage Weil 890355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 891355da1ebSSage Weil return -EROFS; 892355da1ebSSage Weil 893355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 894355da1ebSSage Weil return -EOPNOTSUPP; 895355da1ebSSage Weil 89606476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 897355da1ebSSage Weil if (vxattr && vxattr->readonly) 898355da1ebSSage Weil return -EOPNOTSUPP; 899355da1ebSSage Weil 900d421acb1SSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 901d421acb1SSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 902d421acb1SSage Weil goto do_sync_unlocked; 903d421acb1SSage Weil 90483eb26afSAlex Elder err = -ENOMEM; 905be655596SSage Weil spin_lock(&ci->i_ceph_lock); 90683eb26afSAlex Elder retry: 907355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 908355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 909355da1ebSSage Weil 910355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 911355da1ebSSage Weil goto do_sync; 91218fa8b3fSAlex Elder __build_xattrs(inode); 913355da1ebSSage Weil 91483eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 91583eb26afSAlex Elder 91683eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 91783eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 91883eb26afSAlex Elder struct ceph_buffer *blob; 91983eb26afSAlex Elder 92083eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 92183eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 92283eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 92383eb26afSAlex Elder if (!blob) 92483eb26afSAlex Elder goto out; 92583eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 92683eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 92783eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 92883eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 92983eb26afSAlex Elder goto retry; 93083eb26afSAlex Elder } 93183eb26afSAlex Elder 932355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 93318fa8b3fSAlex Elder 934fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 935355da1ebSSage Weil ci->i_xattrs.dirty = true; 936355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 937be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 938fca65b4aSSage Weil if (dirty) 939fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 940355da1ebSSage Weil return err; 941355da1ebSSage Weil do_sync: 942be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 943d421acb1SSage Weil do_sync_unlocked: 944355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 94583eb26afSAlex Elder out: 946355da1ebSSage Weil return err; 947355da1ebSSage Weil } 948355da1ebSSage Weil 949