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; 33355da1ebSSage Weil }; 34355da1ebSSage Weil 35355da1ebSSage Weil /* directories */ 36355da1ebSSage Weil 37aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, 38355da1ebSSage Weil size_t size) 39355da1ebSSage Weil { 40355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); 41355da1ebSSage Weil } 42355da1ebSSage Weil 43aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, 44355da1ebSSage Weil size_t size) 45355da1ebSSage Weil { 46355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files); 47355da1ebSSage Weil } 48355da1ebSSage Weil 49aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, 50355da1ebSSage Weil size_t size) 51355da1ebSSage Weil { 52355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_subdirs); 53355da1ebSSage Weil } 54355da1ebSSage Weil 55aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, 56355da1ebSSage Weil size_t size) 57355da1ebSSage Weil { 58355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); 59355da1ebSSage Weil } 60355da1ebSSage Weil 61aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, 62355da1ebSSage Weil size_t size) 63355da1ebSSage Weil { 64355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles); 65355da1ebSSage Weil } 66355da1ebSSage Weil 67aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, 68355da1ebSSage Weil size_t size) 69355da1ebSSage Weil { 70355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rsubdirs); 71355da1ebSSage Weil } 72355da1ebSSage Weil 73aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, 74355da1ebSSage Weil size_t size) 75355da1ebSSage Weil { 76355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rbytes); 77355da1ebSSage Weil } 78355da1ebSSage Weil 79aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, 80355da1ebSSage Weil size_t size) 81355da1ebSSage Weil { 823489b42aSAlex Elder return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, 83355da1ebSSage Weil (long)ci->i_rctime.tv_nsec); 84355da1ebSSage Weil } 85355da1ebSSage Weil 86eb788084SAlex Elder #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name 87eb788084SAlex Elder 88eb788084SAlex Elder #define XATTR_NAME_CEPH(_type, _name) \ 89eb788084SAlex Elder { \ 90eb788084SAlex Elder .name = CEPH_XATTR_NAME(_type, _name), \ 913ce6cd12SAlex Elder .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ 92aa4066edSAlex Elder .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ 93eb788084SAlex Elder .readonly = true, \ 948860147aSSage Weil .hidden = false, \ 95eb788084SAlex Elder } 96eb788084SAlex Elder 97881a5fa2SAlex Elder static struct ceph_vxattr ceph_dir_vxattrs[] = { 98eb788084SAlex Elder XATTR_NAME_CEPH(dir, entries), 99eb788084SAlex Elder XATTR_NAME_CEPH(dir, files), 100eb788084SAlex Elder XATTR_NAME_CEPH(dir, subdirs), 101eb788084SAlex Elder XATTR_NAME_CEPH(dir, rentries), 102eb788084SAlex Elder XATTR_NAME_CEPH(dir, rfiles), 103eb788084SAlex Elder XATTR_NAME_CEPH(dir, rsubdirs), 104eb788084SAlex Elder XATTR_NAME_CEPH(dir, rbytes), 105eb788084SAlex Elder XATTR_NAME_CEPH(dir, rctime), 106eb788084SAlex Elder { 0 } /* Required table terminator */ 107355da1ebSSage Weil }; 1083ce6cd12SAlex Elder static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ 109355da1ebSSage Weil 110355da1ebSSage Weil /* files */ 111355da1ebSSage Weil 112aa4066edSAlex Elder static size_t ceph_vxattrcb_file_layout(struct ceph_inode_info *ci, char *val, 113355da1ebSSage Weil size_t size) 114355da1ebSSage Weil { 115b195befdSSage Weil int ret; 116b195befdSSage Weil 117b195befdSSage Weil ret = snprintf(val, size, 118355da1ebSSage Weil "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n", 119355da1ebSSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 120355da1ebSSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 121355da1ebSSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); 122b195befdSSage Weil return ret; 123355da1ebSSage Weil } 124355da1ebSSage Weil 125881a5fa2SAlex Elder static struct ceph_vxattr ceph_file_vxattrs[] = { 126eb788084SAlex Elder XATTR_NAME_CEPH(file, layout), 127eb788084SAlex Elder { 0 } /* Required table terminator */ 128355da1ebSSage Weil }; 1293ce6cd12SAlex Elder static size_t ceph_file_vxattrs_name_size; /* total size of all names */ 130355da1ebSSage Weil 131881a5fa2SAlex Elder static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) 132355da1ebSSage Weil { 133355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 134355da1ebSSage Weil return ceph_dir_vxattrs; 135355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 136355da1ebSSage Weil return ceph_file_vxattrs; 137355da1ebSSage Weil return NULL; 138355da1ebSSage Weil } 139355da1ebSSage Weil 1403ce6cd12SAlex Elder static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) 1413ce6cd12SAlex Elder { 1423ce6cd12SAlex Elder if (vxattrs == ceph_dir_vxattrs) 1433ce6cd12SAlex Elder return ceph_dir_vxattrs_name_size; 1443ce6cd12SAlex Elder if (vxattrs == ceph_file_vxattrs) 1453ce6cd12SAlex Elder return ceph_file_vxattrs_name_size; 1463ce6cd12SAlex Elder BUG(); 1473ce6cd12SAlex Elder 1483ce6cd12SAlex Elder return 0; 1493ce6cd12SAlex Elder } 1503ce6cd12SAlex Elder 1513ce6cd12SAlex Elder /* 1523ce6cd12SAlex Elder * Compute the aggregate size (including terminating '\0') of all 1533ce6cd12SAlex Elder * virtual extended attribute names in the given vxattr table. 1543ce6cd12SAlex Elder */ 1553ce6cd12SAlex Elder static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) 1563ce6cd12SAlex Elder { 1573ce6cd12SAlex Elder struct ceph_vxattr *vxattr; 1583ce6cd12SAlex Elder size_t size = 0; 1593ce6cd12SAlex Elder 1603ce6cd12SAlex Elder for (vxattr = vxattrs; vxattr->name; vxattr++) 1618860147aSSage Weil if (!vxattr->hidden) 1623ce6cd12SAlex Elder size += vxattr->name_size; 1633ce6cd12SAlex Elder 1643ce6cd12SAlex Elder return size; 1653ce6cd12SAlex Elder } 1663ce6cd12SAlex Elder 1673ce6cd12SAlex Elder /* Routines called at initialization and exit time */ 1683ce6cd12SAlex Elder 1693ce6cd12SAlex Elder void __init ceph_xattr_init(void) 1703ce6cd12SAlex Elder { 1713ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); 1723ce6cd12SAlex Elder ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); 1733ce6cd12SAlex Elder } 1743ce6cd12SAlex Elder 1753ce6cd12SAlex Elder void ceph_xattr_exit(void) 1763ce6cd12SAlex Elder { 1773ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = 0; 1783ce6cd12SAlex Elder ceph_file_vxattrs_name_size = 0; 1793ce6cd12SAlex Elder } 1803ce6cd12SAlex Elder 181881a5fa2SAlex Elder static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, 182355da1ebSSage Weil const char *name) 183355da1ebSSage Weil { 184881a5fa2SAlex Elder struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); 18506476a69SAlex Elder 18606476a69SAlex Elder if (vxattr) { 18706476a69SAlex Elder while (vxattr->name) { 18806476a69SAlex Elder if (!strcmp(vxattr->name, name)) 189355da1ebSSage Weil return vxattr; 190355da1ebSSage Weil vxattr++; 19106476a69SAlex Elder } 19206476a69SAlex Elder } 19306476a69SAlex Elder 194355da1ebSSage Weil return NULL; 195355da1ebSSage Weil } 196355da1ebSSage Weil 197355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 198355da1ebSSage Weil const char *name, int name_len, 199355da1ebSSage Weil const char *val, int val_len, 200355da1ebSSage Weil int dirty, 201355da1ebSSage Weil int should_free_name, int should_free_val, 202355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 203355da1ebSSage Weil { 204355da1ebSSage Weil struct rb_node **p; 205355da1ebSSage Weil struct rb_node *parent = NULL; 206355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 207355da1ebSSage Weil int c; 208355da1ebSSage Weil int new = 0; 209355da1ebSSage Weil 210355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 211355da1ebSSage Weil while (*p) { 212355da1ebSSage Weil parent = *p; 213355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 214355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 215355da1ebSSage Weil if (c < 0) 216355da1ebSSage Weil p = &(*p)->rb_left; 217355da1ebSSage Weil else if (c > 0) 218355da1ebSSage Weil p = &(*p)->rb_right; 219355da1ebSSage Weil else { 220355da1ebSSage Weil if (name_len == xattr->name_len) 221355da1ebSSage Weil break; 222355da1ebSSage Weil else if (name_len < xattr->name_len) 223355da1ebSSage Weil p = &(*p)->rb_left; 224355da1ebSSage Weil else 225355da1ebSSage Weil p = &(*p)->rb_right; 226355da1ebSSage Weil } 227355da1ebSSage Weil xattr = NULL; 228355da1ebSSage Weil } 229355da1ebSSage Weil 230355da1ebSSage Weil if (!xattr) { 231355da1ebSSage Weil new = 1; 232355da1ebSSage Weil xattr = *newxattr; 233355da1ebSSage Weil xattr->name = name; 234355da1ebSSage Weil xattr->name_len = name_len; 235355da1ebSSage Weil xattr->should_free_name = should_free_name; 236355da1ebSSage Weil 237355da1ebSSage Weil ci->i_xattrs.count++; 238355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 239355da1ebSSage Weil } else { 240355da1ebSSage Weil kfree(*newxattr); 241355da1ebSSage Weil *newxattr = NULL; 242355da1ebSSage Weil if (xattr->should_free_val) 243355da1ebSSage Weil kfree((void *)xattr->val); 244355da1ebSSage Weil 245355da1ebSSage Weil if (should_free_name) { 246355da1ebSSage Weil kfree((void *)name); 247355da1ebSSage Weil name = xattr->name; 248355da1ebSSage Weil } 249355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 250355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 251355da1ebSSage Weil } 252355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 253355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 254355da1ebSSage Weil if (val) 255355da1ebSSage Weil xattr->val = val; 256355da1ebSSage Weil else 257355da1ebSSage Weil xattr->val = ""; 258355da1ebSSage Weil 259355da1ebSSage Weil xattr->val_len = val_len; 260355da1ebSSage Weil xattr->dirty = dirty; 261355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 262355da1ebSSage Weil 263355da1ebSSage Weil if (new) { 264355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 265355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 266355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 267355da1ebSSage Weil } 268355da1ebSSage Weil 269355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 270355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 271355da1ebSSage Weil 272355da1ebSSage Weil return 0; 273355da1ebSSage Weil } 274355da1ebSSage Weil 275355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 276355da1ebSSage Weil const char *name) 277355da1ebSSage Weil { 278355da1ebSSage Weil struct rb_node **p; 279355da1ebSSage Weil struct rb_node *parent = NULL; 280355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 28117db143fSSage Weil int name_len = strlen(name); 282355da1ebSSage Weil int c; 283355da1ebSSage Weil 284355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 285355da1ebSSage Weil while (*p) { 286355da1ebSSage Weil parent = *p; 287355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 288355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 28917db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 29017db143fSSage Weil c = 1; 291355da1ebSSage Weil if (c < 0) 292355da1ebSSage Weil p = &(*p)->rb_left; 293355da1ebSSage Weil else if (c > 0) 294355da1ebSSage Weil p = &(*p)->rb_right; 295355da1ebSSage Weil else { 296355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 297355da1ebSSage Weil xattr->val_len, xattr->val); 298355da1ebSSage Weil return xattr; 299355da1ebSSage Weil } 300355da1ebSSage Weil } 301355da1ebSSage Weil 302355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 303355da1ebSSage Weil 304355da1ebSSage Weil return NULL; 305355da1ebSSage Weil } 306355da1ebSSage Weil 307355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 308355da1ebSSage Weil { 309355da1ebSSage Weil BUG_ON(!xattr); 310355da1ebSSage Weil 311355da1ebSSage Weil if (xattr->should_free_name) 312355da1ebSSage Weil kfree((void *)xattr->name); 313355da1ebSSage Weil if (xattr->should_free_val) 314355da1ebSSage Weil kfree((void *)xattr->val); 315355da1ebSSage Weil 316355da1ebSSage Weil kfree(xattr); 317355da1ebSSage Weil } 318355da1ebSSage Weil 319355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 320355da1ebSSage Weil struct ceph_inode_xattr *xattr) 321355da1ebSSage Weil { 322355da1ebSSage Weil if (!xattr) 323355da1ebSSage Weil return -EOPNOTSUPP; 324355da1ebSSage Weil 325355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 326355da1ebSSage Weil 327355da1ebSSage Weil if (xattr->should_free_name) 328355da1ebSSage Weil kfree((void *)xattr->name); 329355da1ebSSage Weil if (xattr->should_free_val) 330355da1ebSSage Weil kfree((void *)xattr->val); 331355da1ebSSage Weil 332355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 333355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 334355da1ebSSage Weil ci->i_xattrs.count--; 335355da1ebSSage Weil kfree(xattr); 336355da1ebSSage Weil 337355da1ebSSage Weil return 0; 338355da1ebSSage Weil } 339355da1ebSSage Weil 340355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 341355da1ebSSage Weil const char *name) 342355da1ebSSage Weil { 343355da1ebSSage Weil struct rb_node **p; 344355da1ebSSage Weil struct ceph_inode_xattr *xattr; 345355da1ebSSage Weil int err; 346355da1ebSSage Weil 347355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 348355da1ebSSage Weil xattr = __get_xattr(ci, name); 349355da1ebSSage Weil err = __remove_xattr(ci, xattr); 350355da1ebSSage Weil return err; 351355da1ebSSage Weil } 352355da1ebSSage Weil 353355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 354355da1ebSSage Weil char *dest) 355355da1ebSSage Weil { 356355da1ebSSage Weil struct rb_node *p; 357355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 358355da1ebSSage Weil 359355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 360355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 361355da1ebSSage Weil 362355da1ebSSage Weil while (p) { 363355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 364355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 365355da1ebSSage Weil dest[xattr->name_len] = '\0'; 366355da1ebSSage Weil 367355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 368355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 369355da1ebSSage Weil 370355da1ebSSage Weil dest += xattr->name_len + 1; 371355da1ebSSage Weil p = rb_next(p); 372355da1ebSSage Weil } 373355da1ebSSage Weil 374355da1ebSSage Weil return dest; 375355da1ebSSage Weil } 376355da1ebSSage Weil 377355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 378355da1ebSSage Weil { 379355da1ebSSage Weil struct rb_node *p, *tmp; 380355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 381355da1ebSSage Weil 382355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 383355da1ebSSage Weil 384355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 385355da1ebSSage Weil 386355da1ebSSage Weil while (p) { 387355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 388355da1ebSSage Weil tmp = p; 389355da1ebSSage Weil p = rb_next(tmp); 390355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 391355da1ebSSage Weil xattr->name_len, xattr->name); 392355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 393355da1ebSSage Weil 394355da1ebSSage Weil __free_xattr(xattr); 395355da1ebSSage Weil } 396355da1ebSSage Weil 397355da1ebSSage Weil ci->i_xattrs.names_size = 0; 398355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 399355da1ebSSage Weil ci->i_xattrs.index_version = 0; 400355da1ebSSage Weil ci->i_xattrs.count = 0; 401355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 402355da1ebSSage Weil } 403355da1ebSSage Weil 404355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 405be655596SSage Weil __releases(ci->i_ceph_lock) 406be655596SSage Weil __acquires(ci->i_ceph_lock) 407355da1ebSSage Weil { 408355da1ebSSage Weil u32 namelen; 409355da1ebSSage Weil u32 numattr = 0; 410355da1ebSSage Weil void *p, *end; 411355da1ebSSage Weil u32 len; 412355da1ebSSage Weil const char *name, *val; 413355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 414355da1ebSSage Weil int xattr_version; 415355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 41663ff78b2SSage Weil int err = 0; 417355da1ebSSage Weil int i; 418355da1ebSSage Weil 419355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 420355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 421355da1ebSSage Weil 422355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 423355da1ebSSage Weil return 0; /* already built */ 424355da1ebSSage Weil 425355da1ebSSage Weil __ceph_destroy_xattrs(ci); 426355da1ebSSage Weil 427355da1ebSSage Weil start: 428355da1ebSSage Weil /* updated internal xattr rb tree */ 429355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 430355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 431355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 432355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 433355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 434be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 435355da1ebSSage Weil 436355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 437355da1ebSSage Weil GFP_NOFS); 438355da1ebSSage Weil err = -ENOMEM; 439355da1ebSSage Weil if (!xattrs) 440355da1ebSSage Weil goto bad_lock; 441355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 442355da1ebSSage Weil for (i = 0; i < numattr; i++) { 443355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 444355da1ebSSage Weil GFP_NOFS); 445355da1ebSSage Weil if (!xattrs[i]) 446355da1ebSSage Weil goto bad_lock; 447355da1ebSSage Weil } 448355da1ebSSage Weil 449be655596SSage Weil spin_lock(&ci->i_ceph_lock); 450355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 451355da1ebSSage Weil /* lost a race, retry */ 452355da1ebSSage Weil for (i = 0; i < numattr; i++) 453355da1ebSSage Weil kfree(xattrs[i]); 454355da1ebSSage Weil kfree(xattrs); 45521ec6ffaSAlan Cox xattrs = NULL; 456355da1ebSSage Weil goto start; 457355da1ebSSage Weil } 458355da1ebSSage Weil err = -EIO; 459355da1ebSSage Weil while (numattr--) { 460355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 461355da1ebSSage Weil namelen = len; 462355da1ebSSage Weil name = p; 463355da1ebSSage Weil p += len; 464355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 465355da1ebSSage Weil val = p; 466355da1ebSSage Weil p += len; 467355da1ebSSage Weil 468355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 469355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 470355da1ebSSage Weil 471355da1ebSSage Weil if (err < 0) 472355da1ebSSage Weil goto bad; 473355da1ebSSage Weil } 474355da1ebSSage Weil kfree(xattrs); 475355da1ebSSage Weil } 476355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 477355da1ebSSage Weil ci->i_xattrs.dirty = false; 478355da1ebSSage Weil 479355da1ebSSage Weil return err; 480355da1ebSSage Weil bad_lock: 481be655596SSage Weil spin_lock(&ci->i_ceph_lock); 482355da1ebSSage Weil bad: 483355da1ebSSage Weil if (xattrs) { 484355da1ebSSage Weil for (i = 0; i < numattr; i++) 485355da1ebSSage Weil kfree(xattrs[i]); 486355da1ebSSage Weil kfree(xattrs); 487355da1ebSSage Weil } 488355da1ebSSage Weil ci->i_xattrs.names_size = 0; 489355da1ebSSage Weil return err; 490355da1ebSSage Weil } 491355da1ebSSage Weil 492355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 493355da1ebSSage Weil int val_size) 494355da1ebSSage Weil { 495355da1ebSSage Weil /* 496355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 497355da1ebSSage Weil * 4 bytes per each value 498355da1ebSSage Weil */ 499355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 500355da1ebSSage Weil ci->i_xattrs.names_size + 501355da1ebSSage Weil ci->i_xattrs.vals_size; 502355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 503355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 504355da1ebSSage Weil ci->i_xattrs.vals_size); 505355da1ebSSage Weil 506355da1ebSSage Weil if (name_size) 507355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 508355da1ebSSage Weil 509355da1ebSSage Weil return size; 510355da1ebSSage Weil } 511355da1ebSSage Weil 512355da1ebSSage Weil /* 513355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 514355da1ebSSage Weil * and swap into place. 515355da1ebSSage Weil */ 516355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 517355da1ebSSage Weil { 518355da1ebSSage Weil struct rb_node *p; 519355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 520355da1ebSSage Weil void *dest; 521355da1ebSSage Weil 522355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 523355da1ebSSage Weil if (ci->i_xattrs.dirty) { 524355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 525355da1ebSSage Weil 526355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 527355da1ebSSage Weil 528355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 529355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 530355da1ebSSage Weil 531355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 532355da1ebSSage Weil while (p) { 533355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 534355da1ebSSage Weil 535355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 536355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 537355da1ebSSage Weil dest += xattr->name_len; 538355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 539355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 540355da1ebSSage Weil dest += xattr->val_len; 541355da1ebSSage Weil 542355da1ebSSage Weil p = rb_next(p); 543355da1ebSSage Weil } 544355da1ebSSage Weil 545355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 546355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 547355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 548355da1ebSSage Weil 549b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 550355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 551355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 552355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 553355da1ebSSage Weil ci->i_xattrs.dirty = false; 5544a625be4SSage Weil ci->i_xattrs.version++; 555355da1ebSSage Weil } 556355da1ebSSage Weil } 557355da1ebSSage Weil 558355da1ebSSage Weil ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 559355da1ebSSage Weil size_t size) 560355da1ebSSage Weil { 561355da1ebSSage Weil struct inode *inode = dentry->d_inode; 562355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 563355da1ebSSage Weil int err; 564355da1ebSSage Weil struct ceph_inode_xattr *xattr; 565881a5fa2SAlex Elder struct ceph_vxattr *vxattr = NULL; 566355da1ebSSage Weil 567355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 568355da1ebSSage Weil return -ENODATA; 569355da1ebSSage Weil 570355da1ebSSage Weil /* let's see if a virtual xattr was requested */ 57106476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 572355da1ebSSage Weil 573be655596SSage Weil spin_lock(&ci->i_ceph_lock); 574355da1ebSSage Weil dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 575355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 576355da1ebSSage Weil 577355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 578355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 579355da1ebSSage Weil goto get_xattr; 580355da1ebSSage Weil } else { 581be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 582355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 583355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 584355da1ebSSage Weil if (err) 585355da1ebSSage Weil return err; 586355da1ebSSage Weil } 587355da1ebSSage Weil 588be655596SSage Weil spin_lock(&ci->i_ceph_lock); 589355da1ebSSage Weil 590355da1ebSSage Weil if (vxattr && vxattr->readonly) { 591355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 592355da1ebSSage Weil goto out; 593355da1ebSSage Weil } 594355da1ebSSage Weil 595355da1ebSSage Weil err = __build_xattrs(inode); 596355da1ebSSage Weil if (err < 0) 597355da1ebSSage Weil goto out; 598355da1ebSSage Weil 599355da1ebSSage Weil get_xattr: 600355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 601355da1ebSSage Weil xattr = __get_xattr(ci, name); 602355da1ebSSage Weil if (!xattr) { 603355da1ebSSage Weil if (vxattr) 604355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 605355da1ebSSage Weil goto out; 606355da1ebSSage Weil } 607355da1ebSSage Weil 608355da1ebSSage Weil err = -ERANGE; 609355da1ebSSage Weil if (size && size < xattr->val_len) 610355da1ebSSage Weil goto out; 611355da1ebSSage Weil 612355da1ebSSage Weil err = xattr->val_len; 613355da1ebSSage Weil if (size == 0) 614355da1ebSSage Weil goto out; 615355da1ebSSage Weil 616355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 617355da1ebSSage Weil 618355da1ebSSage Weil out: 619be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 620355da1ebSSage Weil return err; 621355da1ebSSage Weil } 622355da1ebSSage Weil 623355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 624355da1ebSSage Weil { 625355da1ebSSage Weil struct inode *inode = dentry->d_inode; 626355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 627881a5fa2SAlex Elder struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); 628355da1ebSSage Weil u32 vir_namelen = 0; 629355da1ebSSage Weil u32 namelen; 630355da1ebSSage Weil int err; 631355da1ebSSage Weil u32 len; 632355da1ebSSage Weil int i; 633355da1ebSSage Weil 634be655596SSage Weil spin_lock(&ci->i_ceph_lock); 635355da1ebSSage Weil dout("listxattr %p ver=%lld index_ver=%lld\n", inode, 636355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 637355da1ebSSage Weil 638355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 639bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 640355da1ebSSage Weil goto list_xattr; 641355da1ebSSage Weil } else { 642be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 643355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 644355da1ebSSage Weil if (err) 645355da1ebSSage Weil return err; 646355da1ebSSage Weil } 647355da1ebSSage Weil 648be655596SSage Weil spin_lock(&ci->i_ceph_lock); 649355da1ebSSage Weil 650355da1ebSSage Weil err = __build_xattrs(inode); 651355da1ebSSage Weil if (err < 0) 652355da1ebSSage Weil goto out; 653355da1ebSSage Weil 654355da1ebSSage Weil list_xattr: 6553ce6cd12SAlex Elder /* 6563ce6cd12SAlex Elder * Start with virtual dir xattr names (if any) (including 6573ce6cd12SAlex Elder * terminating '\0' characters for each). 6583ce6cd12SAlex Elder */ 6593ce6cd12SAlex Elder vir_namelen = ceph_vxattrs_name_size(vxattrs); 6603ce6cd12SAlex Elder 661355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 662355da1ebSSage Weil namelen = vir_namelen + ci->i_xattrs.names_size + ci->i_xattrs.count; 663355da1ebSSage Weil err = -ERANGE; 664355da1ebSSage Weil if (size && namelen > size) 665355da1ebSSage Weil goto out; 666355da1ebSSage Weil 667355da1ebSSage Weil err = namelen; 668355da1ebSSage Weil if (size == 0) 669355da1ebSSage Weil goto out; 670355da1ebSSage Weil 671355da1ebSSage Weil names = __copy_xattr_names(ci, names); 672355da1ebSSage Weil 673355da1ebSSage Weil /* virtual xattr names, too */ 674355da1ebSSage Weil if (vxattrs) 675355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 676355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 677355da1ebSSage Weil names += len + 1; 678355da1ebSSage Weil } 679355da1ebSSage Weil 680355da1ebSSage Weil out: 681be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 682355da1ebSSage Weil return err; 683355da1ebSSage Weil } 684355da1ebSSage Weil 685355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 686355da1ebSSage Weil const char *value, size_t size, int flags) 687355da1ebSSage Weil { 6883d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 689355da1ebSSage Weil struct inode *inode = dentry->d_inode; 690355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 6915f21c96dSSage Weil struct inode *parent_inode; 692355da1ebSSage Weil struct ceph_mds_request *req; 6933d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 694355da1ebSSage Weil int err; 695355da1ebSSage Weil int i, nr_pages; 696355da1ebSSage Weil struct page **pages = NULL; 697355da1ebSSage Weil void *kaddr; 698355da1ebSSage Weil 699355da1ebSSage Weil /* copy value into some pages */ 700355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 701355da1ebSSage Weil if (nr_pages) { 702355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 703355da1ebSSage Weil if (!pages) 704355da1ebSSage Weil return -ENOMEM; 705355da1ebSSage Weil err = -ENOMEM; 706355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 70731459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 708355da1ebSSage Weil if (!pages[i]) { 709355da1ebSSage Weil nr_pages = i; 710355da1ebSSage Weil goto out; 711355da1ebSSage Weil } 712355da1ebSSage Weil kaddr = kmap(pages[i]); 713355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 714355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 715355da1ebSSage Weil } 716355da1ebSSage Weil } 717355da1ebSSage Weil 718355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 719355da1ebSSage Weil 720355da1ebSSage Weil /* do request */ 721355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 722355da1ebSSage Weil USE_AUTH_MDS); 72360d87733SJulia Lawall if (IS_ERR(req)) { 72460d87733SJulia Lawall err = PTR_ERR(req); 72560d87733SJulia Lawall goto out; 72660d87733SJulia Lawall } 72770b666c3SSage Weil req->r_inode = inode; 72870b666c3SSage Weil ihold(inode); 729355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 730355da1ebSSage Weil req->r_num_caps = 1; 731355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 732355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 733355da1ebSSage Weil 734355da1ebSSage Weil req->r_pages = pages; 735355da1ebSSage Weil req->r_num_pages = nr_pages; 736355da1ebSSage Weil req->r_data_len = size; 737355da1ebSSage Weil 738355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 7395f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 740355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 7415f21c96dSSage Weil iput(parent_inode); 742355da1ebSSage Weil ceph_mdsc_put_request(req); 743355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 744355da1ebSSage Weil 745355da1ebSSage Weil out: 746355da1ebSSage Weil if (pages) { 747355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 748355da1ebSSage Weil __free_page(pages[i]); 749355da1ebSSage Weil kfree(pages); 750355da1ebSSage Weil } 751355da1ebSSage Weil return err; 752355da1ebSSage Weil } 753355da1ebSSage Weil 754355da1ebSSage Weil int ceph_setxattr(struct dentry *dentry, const char *name, 755355da1ebSSage Weil const void *value, size_t size, int flags) 756355da1ebSSage Weil { 757355da1ebSSage Weil struct inode *inode = dentry->d_inode; 758881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 759355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 76018fa8b3fSAlex Elder int issued; 761355da1ebSSage Weil int err; 76218fa8b3fSAlex Elder int dirty; 763355da1ebSSage Weil int name_len = strlen(name); 764355da1ebSSage Weil int val_len = size; 765355da1ebSSage Weil char *newname = NULL; 766355da1ebSSage Weil char *newval = NULL; 767355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 768355da1ebSSage Weil int required_blob_size; 769355da1ebSSage Weil 770355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 771355da1ebSSage Weil return -EROFS; 772355da1ebSSage Weil 773355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 774355da1ebSSage Weil return -EOPNOTSUPP; 775355da1ebSSage Weil 77606476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 777355da1ebSSage Weil if (vxattr && vxattr->readonly) 778355da1ebSSage Weil return -EOPNOTSUPP; 779355da1ebSSage Weil 780*3adf654dSSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 781*3adf654dSSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 782*3adf654dSSage Weil goto do_sync_unlocked; 783*3adf654dSSage Weil 784355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 785355da1ebSSage Weil err = -ENOMEM; 78661413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 787355da1ebSSage Weil if (!newname) 788355da1ebSSage Weil goto out; 789355da1ebSSage Weil 790355da1ebSSage Weil if (val_len) { 791b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 792355da1ebSSage Weil if (!newval) 793355da1ebSSage Weil goto out; 794355da1ebSSage Weil } 795355da1ebSSage Weil 796355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 797355da1ebSSage Weil if (!xattr) 798355da1ebSSage Weil goto out; 799355da1ebSSage Weil 800be655596SSage Weil spin_lock(&ci->i_ceph_lock); 801355da1ebSSage Weil retry: 802355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 80318fa8b3fSAlex Elder dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 804355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 805355da1ebSSage Weil goto do_sync; 806355da1ebSSage Weil __build_xattrs(inode); 807355da1ebSSage Weil 808355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 809355da1ebSSage Weil 810355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 811355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 81218fa8b3fSAlex Elder struct ceph_buffer *blob; 813355da1ebSSage Weil 814be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 815355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 816b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 817355da1ebSSage Weil if (!blob) 818355da1ebSSage Weil goto out; 819be655596SSage Weil spin_lock(&ci->i_ceph_lock); 820b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 821355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 822355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 823355da1ebSSage Weil goto retry; 824355da1ebSSage Weil } 825355da1ebSSage Weil 826355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 827355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 82818fa8b3fSAlex Elder 829fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 830355da1ebSSage Weil ci->i_xattrs.dirty = true; 831355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 83218fa8b3fSAlex Elder 833be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 834fca65b4aSSage Weil if (dirty) 835fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 836355da1ebSSage Weil return err; 837355da1ebSSage Weil 838355da1ebSSage Weil do_sync: 839be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 840*3adf654dSSage Weil do_sync_unlocked: 841355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 842355da1ebSSage Weil out: 843355da1ebSSage Weil kfree(newname); 844355da1ebSSage Weil kfree(newval); 845355da1ebSSage Weil kfree(xattr); 846355da1ebSSage Weil return err; 847355da1ebSSage Weil } 848355da1ebSSage Weil 849355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 850355da1ebSSage Weil { 8513d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 8523d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 853355da1ebSSage Weil struct inode *inode = dentry->d_inode; 8545f21c96dSSage Weil struct inode *parent_inode; 855355da1ebSSage Weil struct ceph_mds_request *req; 856355da1ebSSage Weil int err; 857355da1ebSSage Weil 858355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 859355da1ebSSage Weil USE_AUTH_MDS); 860355da1ebSSage Weil if (IS_ERR(req)) 861355da1ebSSage Weil return PTR_ERR(req); 86270b666c3SSage Weil req->r_inode = inode; 86370b666c3SSage Weil ihold(inode); 864355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 865355da1ebSSage Weil req->r_num_caps = 1; 866355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 867355da1ebSSage Weil 8685f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 869355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 8705f21c96dSSage Weil iput(parent_inode); 871355da1ebSSage Weil ceph_mdsc_put_request(req); 872355da1ebSSage Weil return err; 873355da1ebSSage Weil } 874355da1ebSSage Weil 875355da1ebSSage Weil int ceph_removexattr(struct dentry *dentry, const char *name) 876355da1ebSSage Weil { 877355da1ebSSage Weil struct inode *inode = dentry->d_inode; 878881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 879355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 880355da1ebSSage Weil int issued; 881355da1ebSSage Weil int err; 88283eb26afSAlex Elder int required_blob_size; 883fca65b4aSSage Weil int dirty; 884355da1ebSSage Weil 885355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 886355da1ebSSage Weil return -EROFS; 887355da1ebSSage Weil 888355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 889355da1ebSSage Weil return -EOPNOTSUPP; 890355da1ebSSage Weil 89106476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 892355da1ebSSage Weil if (vxattr && vxattr->readonly) 893355da1ebSSage Weil return -EOPNOTSUPP; 894355da1ebSSage Weil 89583eb26afSAlex Elder err = -ENOMEM; 896be655596SSage Weil spin_lock(&ci->i_ceph_lock); 89783eb26afSAlex Elder retry: 898355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 899355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 900355da1ebSSage Weil 901355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 902355da1ebSSage Weil goto do_sync; 90318fa8b3fSAlex Elder __build_xattrs(inode); 904355da1ebSSage Weil 90583eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 90683eb26afSAlex Elder 90783eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 90883eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 90983eb26afSAlex Elder struct ceph_buffer *blob; 91083eb26afSAlex Elder 91183eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 91283eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 91383eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 91483eb26afSAlex Elder if (!blob) 91583eb26afSAlex Elder goto out; 91683eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 91783eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 91883eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 91983eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 92083eb26afSAlex Elder goto retry; 92183eb26afSAlex Elder } 92283eb26afSAlex Elder 923355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 92418fa8b3fSAlex Elder 925fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 926355da1ebSSage Weil ci->i_xattrs.dirty = true; 927355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 928be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 929fca65b4aSSage Weil if (dirty) 930fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 931355da1ebSSage Weil return err; 932355da1ebSSage Weil do_sync: 933be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 934355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 93583eb26afSAlex Elder out: 936355da1ebSSage Weil return err; 937355da1ebSSage Weil } 938355da1ebSSage Weil 939