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); 32eb788084SAlex Elder bool readonly; 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 { 82355da1ebSSage Weil return snprintf(val, size, "%ld.%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, \ 94eb788084SAlex Elder } 95eb788084SAlex Elder 96881a5fa2SAlex Elder static struct ceph_vxattr ceph_dir_vxattrs[] = { 97eb788084SAlex Elder XATTR_NAME_CEPH(dir, entries), 98eb788084SAlex Elder XATTR_NAME_CEPH(dir, files), 99eb788084SAlex Elder XATTR_NAME_CEPH(dir, subdirs), 100eb788084SAlex Elder XATTR_NAME_CEPH(dir, rentries), 101eb788084SAlex Elder XATTR_NAME_CEPH(dir, rfiles), 102eb788084SAlex Elder XATTR_NAME_CEPH(dir, rsubdirs), 103eb788084SAlex Elder XATTR_NAME_CEPH(dir, rbytes), 104eb788084SAlex Elder XATTR_NAME_CEPH(dir, rctime), 105eb788084SAlex Elder { 0 } /* Required table terminator */ 106355da1ebSSage Weil }; 1073ce6cd12SAlex Elder static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ 108355da1ebSSage Weil 109355da1ebSSage Weil /* files */ 110355da1ebSSage Weil 111aa4066edSAlex Elder static size_t ceph_vxattrcb_file_layout(struct ceph_inode_info *ci, char *val, 112355da1ebSSage Weil size_t size) 113355da1ebSSage Weil { 114b195befdSSage Weil int ret; 115b195befdSSage Weil 116b195befdSSage Weil ret = snprintf(val, size, 117355da1ebSSage Weil "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n", 118355da1ebSSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 119355da1ebSSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 120355da1ebSSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); 121b195befdSSage Weil if (ceph_file_layout_pg_preferred(ci->i_layout)) 122b195befdSSage Weil ret += snprintf(val + ret, size, "preferred_osd=%lld\n", 123b195befdSSage Weil (unsigned long long)ceph_file_layout_pg_preferred( 124b195befdSSage Weil ci->i_layout)); 125b195befdSSage Weil return ret; 126355da1ebSSage Weil } 127355da1ebSSage Weil 128881a5fa2SAlex Elder static struct ceph_vxattr ceph_file_vxattrs[] = { 129eb788084SAlex Elder XATTR_NAME_CEPH(file, layout), 130114fc474SAlex Elder /* The following extended attribute name is deprecated */ 131eb788084SAlex Elder { 132eb788084SAlex Elder .name = XATTR_CEPH_PREFIX "layout", 1333ce6cd12SAlex Elder .name_size = sizeof (XATTR_CEPH_PREFIX "layout"), 134aa4066edSAlex Elder .getxattr_cb = ceph_vxattrcb_file_layout, 135eb788084SAlex Elder .readonly = true, 136eb788084SAlex Elder }, 137eb788084SAlex Elder { 0 } /* Required table terminator */ 138355da1ebSSage Weil }; 1393ce6cd12SAlex Elder static size_t ceph_file_vxattrs_name_size; /* total size of all names */ 140355da1ebSSage Weil 141881a5fa2SAlex Elder static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) 142355da1ebSSage Weil { 143355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 144355da1ebSSage Weil return ceph_dir_vxattrs; 145355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 146355da1ebSSage Weil return ceph_file_vxattrs; 147355da1ebSSage Weil return NULL; 148355da1ebSSage Weil } 149355da1ebSSage Weil 1503ce6cd12SAlex Elder static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) 1513ce6cd12SAlex Elder { 1523ce6cd12SAlex Elder if (vxattrs == ceph_dir_vxattrs) 1533ce6cd12SAlex Elder return ceph_dir_vxattrs_name_size; 1543ce6cd12SAlex Elder if (vxattrs == ceph_file_vxattrs) 1553ce6cd12SAlex Elder return ceph_file_vxattrs_name_size; 1563ce6cd12SAlex Elder BUG(); 1573ce6cd12SAlex Elder 1583ce6cd12SAlex Elder return 0; 1593ce6cd12SAlex Elder } 1603ce6cd12SAlex Elder 1613ce6cd12SAlex Elder /* 1623ce6cd12SAlex Elder * Compute the aggregate size (including terminating '\0') of all 1633ce6cd12SAlex Elder * virtual extended attribute names in the given vxattr table. 1643ce6cd12SAlex Elder */ 1653ce6cd12SAlex Elder static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) 1663ce6cd12SAlex Elder { 1673ce6cd12SAlex Elder struct ceph_vxattr *vxattr; 1683ce6cd12SAlex Elder size_t size = 0; 1693ce6cd12SAlex Elder 1703ce6cd12SAlex Elder for (vxattr = vxattrs; vxattr->name; vxattr++) 1713ce6cd12SAlex Elder size += vxattr->name_size; 1723ce6cd12SAlex Elder 1733ce6cd12SAlex Elder return size; 1743ce6cd12SAlex Elder } 1753ce6cd12SAlex Elder 1763ce6cd12SAlex Elder /* Routines called at initialization and exit time */ 1773ce6cd12SAlex Elder 1783ce6cd12SAlex Elder void __init ceph_xattr_init(void) 1793ce6cd12SAlex Elder { 1803ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); 1813ce6cd12SAlex Elder ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); 1823ce6cd12SAlex Elder } 1833ce6cd12SAlex Elder 1843ce6cd12SAlex Elder void ceph_xattr_exit(void) 1853ce6cd12SAlex Elder { 1863ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = 0; 1873ce6cd12SAlex Elder ceph_file_vxattrs_name_size = 0; 1883ce6cd12SAlex Elder } 1893ce6cd12SAlex Elder 190881a5fa2SAlex Elder static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, 191355da1ebSSage Weil const char *name) 192355da1ebSSage Weil { 193881a5fa2SAlex Elder struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); 19406476a69SAlex Elder 19506476a69SAlex Elder if (vxattr) { 19606476a69SAlex Elder while (vxattr->name) { 19706476a69SAlex Elder if (!strcmp(vxattr->name, name)) 198355da1ebSSage Weil return vxattr; 199355da1ebSSage Weil vxattr++; 20006476a69SAlex Elder } 20106476a69SAlex Elder } 20206476a69SAlex Elder 203355da1ebSSage Weil return NULL; 204355da1ebSSage Weil } 205355da1ebSSage Weil 206355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 207355da1ebSSage Weil const char *name, int name_len, 208355da1ebSSage Weil const char *val, int val_len, 209355da1ebSSage Weil int dirty, 210355da1ebSSage Weil int should_free_name, int should_free_val, 211355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 212355da1ebSSage Weil { 213355da1ebSSage Weil struct rb_node **p; 214355da1ebSSage Weil struct rb_node *parent = NULL; 215355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 216355da1ebSSage Weil int c; 217355da1ebSSage Weil int new = 0; 218355da1ebSSage Weil 219355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 220355da1ebSSage Weil while (*p) { 221355da1ebSSage Weil parent = *p; 222355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 223355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 224355da1ebSSage Weil if (c < 0) 225355da1ebSSage Weil p = &(*p)->rb_left; 226355da1ebSSage Weil else if (c > 0) 227355da1ebSSage Weil p = &(*p)->rb_right; 228355da1ebSSage Weil else { 229355da1ebSSage Weil if (name_len == xattr->name_len) 230355da1ebSSage Weil break; 231355da1ebSSage Weil else if (name_len < xattr->name_len) 232355da1ebSSage Weil p = &(*p)->rb_left; 233355da1ebSSage Weil else 234355da1ebSSage Weil p = &(*p)->rb_right; 235355da1ebSSage Weil } 236355da1ebSSage Weil xattr = NULL; 237355da1ebSSage Weil } 238355da1ebSSage Weil 239355da1ebSSage Weil if (!xattr) { 240355da1ebSSage Weil new = 1; 241355da1ebSSage Weil xattr = *newxattr; 242355da1ebSSage Weil xattr->name = name; 243355da1ebSSage Weil xattr->name_len = name_len; 244355da1ebSSage Weil xattr->should_free_name = should_free_name; 245355da1ebSSage Weil 246355da1ebSSage Weil ci->i_xattrs.count++; 247355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 248355da1ebSSage Weil } else { 249355da1ebSSage Weil kfree(*newxattr); 250355da1ebSSage Weil *newxattr = NULL; 251355da1ebSSage Weil if (xattr->should_free_val) 252355da1ebSSage Weil kfree((void *)xattr->val); 253355da1ebSSage Weil 254355da1ebSSage Weil if (should_free_name) { 255355da1ebSSage Weil kfree((void *)name); 256355da1ebSSage Weil name = xattr->name; 257355da1ebSSage Weil } 258355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 259355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 260355da1ebSSage Weil } 261355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 262355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 263355da1ebSSage Weil if (val) 264355da1ebSSage Weil xattr->val = val; 265355da1ebSSage Weil else 266355da1ebSSage Weil xattr->val = ""; 267355da1ebSSage Weil 268355da1ebSSage Weil xattr->val_len = val_len; 269355da1ebSSage Weil xattr->dirty = dirty; 270355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 271355da1ebSSage Weil 272355da1ebSSage Weil if (new) { 273355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 274355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 275355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 276355da1ebSSage Weil } 277355da1ebSSage Weil 278355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 279355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 280355da1ebSSage Weil 281355da1ebSSage Weil return 0; 282355da1ebSSage Weil } 283355da1ebSSage Weil 284355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 285355da1ebSSage Weil const char *name) 286355da1ebSSage Weil { 287355da1ebSSage Weil struct rb_node **p; 288355da1ebSSage Weil struct rb_node *parent = NULL; 289355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 29017db143fSSage Weil int name_len = strlen(name); 291355da1ebSSage Weil int c; 292355da1ebSSage Weil 293355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 294355da1ebSSage Weil while (*p) { 295355da1ebSSage Weil parent = *p; 296355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 297355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 29817db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 29917db143fSSage Weil c = 1; 300355da1ebSSage Weil if (c < 0) 301355da1ebSSage Weil p = &(*p)->rb_left; 302355da1ebSSage Weil else if (c > 0) 303355da1ebSSage Weil p = &(*p)->rb_right; 304355da1ebSSage Weil else { 305355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 306355da1ebSSage Weil xattr->val_len, xattr->val); 307355da1ebSSage Weil return xattr; 308355da1ebSSage Weil } 309355da1ebSSage Weil } 310355da1ebSSage Weil 311355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 312355da1ebSSage Weil 313355da1ebSSage Weil return NULL; 314355da1ebSSage Weil } 315355da1ebSSage Weil 316355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 317355da1ebSSage Weil { 318355da1ebSSage Weil BUG_ON(!xattr); 319355da1ebSSage Weil 320355da1ebSSage Weil if (xattr->should_free_name) 321355da1ebSSage Weil kfree((void *)xattr->name); 322355da1ebSSage Weil if (xattr->should_free_val) 323355da1ebSSage Weil kfree((void *)xattr->val); 324355da1ebSSage Weil 325355da1ebSSage Weil kfree(xattr); 326355da1ebSSage Weil } 327355da1ebSSage Weil 328355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 329355da1ebSSage Weil struct ceph_inode_xattr *xattr) 330355da1ebSSage Weil { 331355da1ebSSage Weil if (!xattr) 332355da1ebSSage Weil return -EOPNOTSUPP; 333355da1ebSSage Weil 334355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 335355da1ebSSage Weil 336355da1ebSSage Weil if (xattr->should_free_name) 337355da1ebSSage Weil kfree((void *)xattr->name); 338355da1ebSSage Weil if (xattr->should_free_val) 339355da1ebSSage Weil kfree((void *)xattr->val); 340355da1ebSSage Weil 341355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 342355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 343355da1ebSSage Weil ci->i_xattrs.count--; 344355da1ebSSage Weil kfree(xattr); 345355da1ebSSage Weil 346355da1ebSSage Weil return 0; 347355da1ebSSage Weil } 348355da1ebSSage Weil 349355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 350355da1ebSSage Weil const char *name) 351355da1ebSSage Weil { 352355da1ebSSage Weil struct rb_node **p; 353355da1ebSSage Weil struct ceph_inode_xattr *xattr; 354355da1ebSSage Weil int err; 355355da1ebSSage Weil 356355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 357355da1ebSSage Weil xattr = __get_xattr(ci, name); 358355da1ebSSage Weil err = __remove_xattr(ci, xattr); 359355da1ebSSage Weil return err; 360355da1ebSSage Weil } 361355da1ebSSage Weil 362355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 363355da1ebSSage Weil char *dest) 364355da1ebSSage Weil { 365355da1ebSSage Weil struct rb_node *p; 366355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 367355da1ebSSage Weil 368355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 369355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 370355da1ebSSage Weil 371355da1ebSSage Weil while (p) { 372355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 373355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 374355da1ebSSage Weil dest[xattr->name_len] = '\0'; 375355da1ebSSage Weil 376355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 377355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 378355da1ebSSage Weil 379355da1ebSSage Weil dest += xattr->name_len + 1; 380355da1ebSSage Weil p = rb_next(p); 381355da1ebSSage Weil } 382355da1ebSSage Weil 383355da1ebSSage Weil return dest; 384355da1ebSSage Weil } 385355da1ebSSage Weil 386355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 387355da1ebSSage Weil { 388355da1ebSSage Weil struct rb_node *p, *tmp; 389355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 390355da1ebSSage Weil 391355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 392355da1ebSSage Weil 393355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 394355da1ebSSage Weil 395355da1ebSSage Weil while (p) { 396355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 397355da1ebSSage Weil tmp = p; 398355da1ebSSage Weil p = rb_next(tmp); 399355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 400355da1ebSSage Weil xattr->name_len, xattr->name); 401355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 402355da1ebSSage Weil 403355da1ebSSage Weil __free_xattr(xattr); 404355da1ebSSage Weil } 405355da1ebSSage Weil 406355da1ebSSage Weil ci->i_xattrs.names_size = 0; 407355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 408355da1ebSSage Weil ci->i_xattrs.index_version = 0; 409355da1ebSSage Weil ci->i_xattrs.count = 0; 410355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 411355da1ebSSage Weil } 412355da1ebSSage Weil 413355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 414be655596SSage Weil __releases(ci->i_ceph_lock) 415be655596SSage Weil __acquires(ci->i_ceph_lock) 416355da1ebSSage Weil { 417355da1ebSSage Weil u32 namelen; 418355da1ebSSage Weil u32 numattr = 0; 419355da1ebSSage Weil void *p, *end; 420355da1ebSSage Weil u32 len; 421355da1ebSSage Weil const char *name, *val; 422355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 423355da1ebSSage Weil int xattr_version; 424355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 42563ff78b2SSage Weil int err = 0; 426355da1ebSSage Weil int i; 427355da1ebSSage Weil 428355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 429355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 430355da1ebSSage Weil 431355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 432355da1ebSSage Weil return 0; /* already built */ 433355da1ebSSage Weil 434355da1ebSSage Weil __ceph_destroy_xattrs(ci); 435355da1ebSSage Weil 436355da1ebSSage Weil start: 437355da1ebSSage Weil /* updated internal xattr rb tree */ 438355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 439355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 440355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 441355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 442355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 443be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 444355da1ebSSage Weil 445355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 446355da1ebSSage Weil GFP_NOFS); 447355da1ebSSage Weil err = -ENOMEM; 448355da1ebSSage Weil if (!xattrs) 449355da1ebSSage Weil goto bad_lock; 450355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 451355da1ebSSage Weil for (i = 0; i < numattr; i++) { 452355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 453355da1ebSSage Weil GFP_NOFS); 454355da1ebSSage Weil if (!xattrs[i]) 455355da1ebSSage Weil goto bad_lock; 456355da1ebSSage Weil } 457355da1ebSSage Weil 458be655596SSage Weil spin_lock(&ci->i_ceph_lock); 459355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 460355da1ebSSage Weil /* lost a race, retry */ 461355da1ebSSage Weil for (i = 0; i < numattr; i++) 462355da1ebSSage Weil kfree(xattrs[i]); 463355da1ebSSage Weil kfree(xattrs); 464355da1ebSSage Weil goto start; 465355da1ebSSage Weil } 466355da1ebSSage Weil err = -EIO; 467355da1ebSSage Weil while (numattr--) { 468355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 469355da1ebSSage Weil namelen = len; 470355da1ebSSage Weil name = p; 471355da1ebSSage Weil p += len; 472355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 473355da1ebSSage Weil val = p; 474355da1ebSSage Weil p += len; 475355da1ebSSage Weil 476355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 477355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 478355da1ebSSage Weil 479355da1ebSSage Weil if (err < 0) 480355da1ebSSage Weil goto bad; 481355da1ebSSage Weil } 482355da1ebSSage Weil kfree(xattrs); 483355da1ebSSage Weil } 484355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 485355da1ebSSage Weil ci->i_xattrs.dirty = false; 486355da1ebSSage Weil 487355da1ebSSage Weil return err; 488355da1ebSSage Weil bad_lock: 489be655596SSage Weil spin_lock(&ci->i_ceph_lock); 490355da1ebSSage Weil bad: 491355da1ebSSage Weil if (xattrs) { 492355da1ebSSage Weil for (i = 0; i < numattr; i++) 493355da1ebSSage Weil kfree(xattrs[i]); 494355da1ebSSage Weil kfree(xattrs); 495355da1ebSSage Weil } 496355da1ebSSage Weil ci->i_xattrs.names_size = 0; 497355da1ebSSage Weil return err; 498355da1ebSSage Weil } 499355da1ebSSage Weil 500355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 501355da1ebSSage Weil int val_size) 502355da1ebSSage Weil { 503355da1ebSSage Weil /* 504355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 505355da1ebSSage Weil * 4 bytes per each value 506355da1ebSSage Weil */ 507355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 508355da1ebSSage Weil ci->i_xattrs.names_size + 509355da1ebSSage Weil ci->i_xattrs.vals_size; 510355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 511355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 512355da1ebSSage Weil ci->i_xattrs.vals_size); 513355da1ebSSage Weil 514355da1ebSSage Weil if (name_size) 515355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 516355da1ebSSage Weil 517355da1ebSSage Weil return size; 518355da1ebSSage Weil } 519355da1ebSSage Weil 520355da1ebSSage Weil /* 521355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 522355da1ebSSage Weil * and swap into place. 523355da1ebSSage Weil */ 524355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 525355da1ebSSage Weil { 526355da1ebSSage Weil struct rb_node *p; 527355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 528355da1ebSSage Weil void *dest; 529355da1ebSSage Weil 530355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 531355da1ebSSage Weil if (ci->i_xattrs.dirty) { 532355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 533355da1ebSSage Weil 534355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 535355da1ebSSage Weil 536355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 537355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 538355da1ebSSage Weil 539355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 540355da1ebSSage Weil while (p) { 541355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 542355da1ebSSage Weil 543355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 544355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 545355da1ebSSage Weil dest += xattr->name_len; 546355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 547355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 548355da1ebSSage Weil dest += xattr->val_len; 549355da1ebSSage Weil 550355da1ebSSage Weil p = rb_next(p); 551355da1ebSSage Weil } 552355da1ebSSage Weil 553355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 554355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 555355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 556355da1ebSSage Weil 557b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 558355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 559355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 560355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 561355da1ebSSage Weil ci->i_xattrs.dirty = false; 5624a625be4SSage Weil ci->i_xattrs.version++; 563355da1ebSSage Weil } 564355da1ebSSage Weil } 565355da1ebSSage Weil 566355da1ebSSage Weil ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 567355da1ebSSage Weil size_t size) 568355da1ebSSage Weil { 569355da1ebSSage Weil struct inode *inode = dentry->d_inode; 570355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 571355da1ebSSage Weil int err; 572355da1ebSSage Weil struct ceph_inode_xattr *xattr; 573881a5fa2SAlex Elder struct ceph_vxattr *vxattr = NULL; 574355da1ebSSage Weil 575355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 576355da1ebSSage Weil return -ENODATA; 577355da1ebSSage Weil 578355da1ebSSage Weil /* let's see if a virtual xattr was requested */ 57906476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 580355da1ebSSage Weil 581be655596SSage Weil spin_lock(&ci->i_ceph_lock); 582355da1ebSSage Weil dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 583355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 584355da1ebSSage Weil 585355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 586355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 587355da1ebSSage Weil goto get_xattr; 588355da1ebSSage Weil } else { 589be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 590355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 591355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 592355da1ebSSage Weil if (err) 593355da1ebSSage Weil return err; 594355da1ebSSage Weil } 595355da1ebSSage Weil 596be655596SSage Weil spin_lock(&ci->i_ceph_lock); 597355da1ebSSage Weil 598355da1ebSSage Weil if (vxattr && vxattr->readonly) { 599355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 600355da1ebSSage Weil goto out; 601355da1ebSSage Weil } 602355da1ebSSage Weil 603355da1ebSSage Weil err = __build_xattrs(inode); 604355da1ebSSage Weil if (err < 0) 605355da1ebSSage Weil goto out; 606355da1ebSSage Weil 607355da1ebSSage Weil get_xattr: 608355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 609355da1ebSSage Weil xattr = __get_xattr(ci, name); 610355da1ebSSage Weil if (!xattr) { 611355da1ebSSage Weil if (vxattr) 612355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 613355da1ebSSage Weil goto out; 614355da1ebSSage Weil } 615355da1ebSSage Weil 616355da1ebSSage Weil err = -ERANGE; 617355da1ebSSage Weil if (size && size < xattr->val_len) 618355da1ebSSage Weil goto out; 619355da1ebSSage Weil 620355da1ebSSage Weil err = xattr->val_len; 621355da1ebSSage Weil if (size == 0) 622355da1ebSSage Weil goto out; 623355da1ebSSage Weil 624355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 625355da1ebSSage Weil 626355da1ebSSage Weil out: 627be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 628355da1ebSSage Weil return err; 629355da1ebSSage Weil } 630355da1ebSSage Weil 631355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 632355da1ebSSage Weil { 633355da1ebSSage Weil struct inode *inode = dentry->d_inode; 634355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 635881a5fa2SAlex Elder struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); 636355da1ebSSage Weil u32 vir_namelen = 0; 637355da1ebSSage Weil u32 namelen; 638355da1ebSSage Weil int err; 639355da1ebSSage Weil u32 len; 640355da1ebSSage Weil int i; 641355da1ebSSage Weil 642be655596SSage Weil spin_lock(&ci->i_ceph_lock); 643355da1ebSSage Weil dout("listxattr %p ver=%lld index_ver=%lld\n", inode, 644355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 645355da1ebSSage Weil 646355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 647bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 648355da1ebSSage Weil goto list_xattr; 649355da1ebSSage Weil } else { 650be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 651355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 652355da1ebSSage Weil if (err) 653355da1ebSSage Weil return err; 654355da1ebSSage Weil } 655355da1ebSSage Weil 656be655596SSage Weil spin_lock(&ci->i_ceph_lock); 657355da1ebSSage Weil 658355da1ebSSage Weil err = __build_xattrs(inode); 659355da1ebSSage Weil if (err < 0) 660355da1ebSSage Weil goto out; 661355da1ebSSage Weil 662355da1ebSSage Weil list_xattr: 6633ce6cd12SAlex Elder /* 6643ce6cd12SAlex Elder * Start with virtual dir xattr names (if any) (including 6653ce6cd12SAlex Elder * terminating '\0' characters for each). 6663ce6cd12SAlex Elder */ 6673ce6cd12SAlex Elder vir_namelen = ceph_vxattrs_name_size(vxattrs); 6683ce6cd12SAlex Elder 669355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 670355da1ebSSage Weil namelen = vir_namelen + ci->i_xattrs.names_size + ci->i_xattrs.count; 671355da1ebSSage Weil err = -ERANGE; 672355da1ebSSage Weil if (size && namelen > size) 673355da1ebSSage Weil goto out; 674355da1ebSSage Weil 675355da1ebSSage Weil err = namelen; 676355da1ebSSage Weil if (size == 0) 677355da1ebSSage Weil goto out; 678355da1ebSSage Weil 679355da1ebSSage Weil names = __copy_xattr_names(ci, names); 680355da1ebSSage Weil 681355da1ebSSage Weil /* virtual xattr names, too */ 682355da1ebSSage Weil if (vxattrs) 683355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 684355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 685355da1ebSSage Weil names += len + 1; 686355da1ebSSage Weil } 687355da1ebSSage Weil 688355da1ebSSage Weil out: 689be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 690355da1ebSSage Weil return err; 691355da1ebSSage Weil } 692355da1ebSSage Weil 693355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 694355da1ebSSage Weil const char *value, size_t size, int flags) 695355da1ebSSage Weil { 6963d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 697355da1ebSSage Weil struct inode *inode = dentry->d_inode; 698355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 6995f21c96dSSage Weil struct inode *parent_inode; 700355da1ebSSage Weil struct ceph_mds_request *req; 7013d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 702355da1ebSSage Weil int err; 703355da1ebSSage Weil int i, nr_pages; 704355da1ebSSage Weil struct page **pages = NULL; 705355da1ebSSage Weil void *kaddr; 706355da1ebSSage Weil 707355da1ebSSage Weil /* copy value into some pages */ 708355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 709355da1ebSSage Weil if (nr_pages) { 710355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 711355da1ebSSage Weil if (!pages) 712355da1ebSSage Weil return -ENOMEM; 713355da1ebSSage Weil err = -ENOMEM; 714355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 71531459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 716355da1ebSSage Weil if (!pages[i]) { 717355da1ebSSage Weil nr_pages = i; 718355da1ebSSage Weil goto out; 719355da1ebSSage Weil } 720355da1ebSSage Weil kaddr = kmap(pages[i]); 721355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 722355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 723355da1ebSSage Weil } 724355da1ebSSage Weil } 725355da1ebSSage Weil 726355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 727355da1ebSSage Weil 728355da1ebSSage Weil /* do request */ 729355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 730355da1ebSSage Weil USE_AUTH_MDS); 73160d87733SJulia Lawall if (IS_ERR(req)) { 73260d87733SJulia Lawall err = PTR_ERR(req); 73360d87733SJulia Lawall goto out; 73460d87733SJulia Lawall } 73570b666c3SSage Weil req->r_inode = inode; 73670b666c3SSage Weil ihold(inode); 737355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 738355da1ebSSage Weil req->r_num_caps = 1; 739355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 740355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 741355da1ebSSage Weil 742355da1ebSSage Weil req->r_pages = pages; 743355da1ebSSage Weil req->r_num_pages = nr_pages; 744355da1ebSSage Weil req->r_data_len = size; 745355da1ebSSage Weil 746355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 7475f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 748355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 7495f21c96dSSage Weil iput(parent_inode); 750355da1ebSSage Weil ceph_mdsc_put_request(req); 751355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 752355da1ebSSage Weil 753355da1ebSSage Weil out: 754355da1ebSSage Weil if (pages) { 755355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 756355da1ebSSage Weil __free_page(pages[i]); 757355da1ebSSage Weil kfree(pages); 758355da1ebSSage Weil } 759355da1ebSSage Weil return err; 760355da1ebSSage Weil } 761355da1ebSSage Weil 762355da1ebSSage Weil int ceph_setxattr(struct dentry *dentry, const char *name, 763355da1ebSSage Weil const void *value, size_t size, int flags) 764355da1ebSSage Weil { 765355da1ebSSage Weil struct inode *inode = dentry->d_inode; 766881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 767355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 768*18fa8b3fSAlex Elder int issued; 769355da1ebSSage Weil int err; 770*18fa8b3fSAlex Elder int dirty; 771355da1ebSSage Weil int name_len = strlen(name); 772355da1ebSSage Weil int val_len = size; 773355da1ebSSage Weil char *newname = NULL; 774355da1ebSSage Weil char *newval = NULL; 775355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 776355da1ebSSage Weil int required_blob_size; 777355da1ebSSage Weil 778355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 779355da1ebSSage Weil return -EROFS; 780355da1ebSSage Weil 781355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 782355da1ebSSage Weil return -EOPNOTSUPP; 783355da1ebSSage Weil 78406476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 785355da1ebSSage Weil if (vxattr && vxattr->readonly) 786355da1ebSSage Weil return -EOPNOTSUPP; 787355da1ebSSage Weil 788355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 789355da1ebSSage Weil err = -ENOMEM; 79061413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 791355da1ebSSage Weil if (!newname) 792355da1ebSSage Weil goto out; 793355da1ebSSage Weil 794355da1ebSSage Weil if (val_len) { 795b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 796355da1ebSSage Weil if (!newval) 797355da1ebSSage Weil goto out; 798355da1ebSSage Weil } 799355da1ebSSage Weil 800355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 801355da1ebSSage Weil if (!xattr) 802355da1ebSSage Weil goto out; 803355da1ebSSage Weil 804be655596SSage Weil spin_lock(&ci->i_ceph_lock); 805355da1ebSSage Weil retry: 806355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 807*18fa8b3fSAlex Elder dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 808355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 809355da1ebSSage Weil goto do_sync; 810355da1ebSSage Weil __build_xattrs(inode); 811355da1ebSSage Weil 812355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 813355da1ebSSage Weil 814355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 815355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 816*18fa8b3fSAlex Elder struct ceph_buffer *blob; 817355da1ebSSage Weil 818be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 819355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 820b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 821355da1ebSSage Weil if (!blob) 822355da1ebSSage Weil goto out; 823be655596SSage Weil spin_lock(&ci->i_ceph_lock); 824b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 825355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 826355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 827355da1ebSSage Weil goto retry; 828355da1ebSSage Weil } 829355da1ebSSage Weil 830355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 831355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 832*18fa8b3fSAlex Elder 833fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 834355da1ebSSage Weil ci->i_xattrs.dirty = true; 835355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 836*18fa8b3fSAlex Elder 837be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 838fca65b4aSSage Weil if (dirty) 839fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 840355da1ebSSage Weil return err; 841355da1ebSSage Weil 842355da1ebSSage Weil do_sync: 843be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 844355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 845355da1ebSSage Weil out: 846355da1ebSSage Weil kfree(newname); 847355da1ebSSage Weil kfree(newval); 848355da1ebSSage Weil kfree(xattr); 849355da1ebSSage Weil return err; 850355da1ebSSage Weil } 851355da1ebSSage Weil 852355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 853355da1ebSSage Weil { 8543d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 8553d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 856355da1ebSSage Weil struct inode *inode = dentry->d_inode; 8575f21c96dSSage Weil struct inode *parent_inode; 858355da1ebSSage Weil struct ceph_mds_request *req; 859355da1ebSSage Weil int err; 860355da1ebSSage Weil 861355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 862355da1ebSSage Weil USE_AUTH_MDS); 863355da1ebSSage Weil if (IS_ERR(req)) 864355da1ebSSage Weil return PTR_ERR(req); 86570b666c3SSage Weil req->r_inode = inode; 86670b666c3SSage Weil ihold(inode); 867355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 868355da1ebSSage Weil req->r_num_caps = 1; 869355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 870355da1ebSSage Weil 8715f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 872355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 8735f21c96dSSage Weil iput(parent_inode); 874355da1ebSSage Weil ceph_mdsc_put_request(req); 875355da1ebSSage Weil return err; 876355da1ebSSage Weil } 877355da1ebSSage Weil 878355da1ebSSage Weil int ceph_removexattr(struct dentry *dentry, const char *name) 879355da1ebSSage Weil { 880355da1ebSSage Weil struct inode *inode = dentry->d_inode; 881881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 882355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 883355da1ebSSage Weil int issued; 884355da1ebSSage Weil int err; 88583eb26afSAlex Elder int required_blob_size; 886fca65b4aSSage Weil int dirty; 887355da1ebSSage Weil 888355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 889355da1ebSSage Weil return -EROFS; 890355da1ebSSage Weil 891355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 892355da1ebSSage Weil return -EOPNOTSUPP; 893355da1ebSSage Weil 89406476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 895355da1ebSSage Weil if (vxattr && vxattr->readonly) 896355da1ebSSage Weil return -EOPNOTSUPP; 897355da1ebSSage Weil 89883eb26afSAlex Elder err = -ENOMEM; 899be655596SSage Weil spin_lock(&ci->i_ceph_lock); 90083eb26afSAlex Elder retry: 901355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 902355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 903355da1ebSSage Weil 904355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 905355da1ebSSage Weil goto do_sync; 906*18fa8b3fSAlex Elder __build_xattrs(inode); 907355da1ebSSage Weil 90883eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 90983eb26afSAlex Elder 91083eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 91183eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 91283eb26afSAlex Elder struct ceph_buffer *blob; 91383eb26afSAlex Elder 91483eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 91583eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 91683eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 91783eb26afSAlex Elder if (!blob) 91883eb26afSAlex Elder goto out; 91983eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 92083eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 92183eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 92283eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 92383eb26afSAlex Elder goto retry; 92483eb26afSAlex Elder } 92583eb26afSAlex Elder 926355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 927*18fa8b3fSAlex Elder 928fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 929355da1ebSSage Weil ci->i_xattrs.dirty = true; 930355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 931be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 932fca65b4aSSage Weil if (dirty) 933fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 934355da1ebSSage Weil return err; 935355da1ebSSage Weil do_sync: 936be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 937355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 93883eb26afSAlex Elder out: 939355da1ebSSage Weil return err; 940355da1ebSSage Weil } 941355da1ebSSage Weil 942