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; 29355da1ebSSage Weil size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, 30355da1ebSSage Weil size_t size); 31eb788084SAlex Elder bool readonly; 32355da1ebSSage Weil }; 33355da1ebSSage Weil 34355da1ebSSage Weil /* directories */ 35355da1ebSSage Weil 36*aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, 37355da1ebSSage Weil size_t size) 38355da1ebSSage Weil { 39355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); 40355da1ebSSage Weil } 41355da1ebSSage Weil 42*aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, 43355da1ebSSage Weil size_t size) 44355da1ebSSage Weil { 45355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files); 46355da1ebSSage Weil } 47355da1ebSSage Weil 48*aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, 49355da1ebSSage Weil size_t size) 50355da1ebSSage Weil { 51355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_subdirs); 52355da1ebSSage Weil } 53355da1ebSSage Weil 54*aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, 55355da1ebSSage Weil size_t size) 56355da1ebSSage Weil { 57355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); 58355da1ebSSage Weil } 59355da1ebSSage Weil 60*aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, 61355da1ebSSage Weil size_t size) 62355da1ebSSage Weil { 63355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles); 64355da1ebSSage Weil } 65355da1ebSSage Weil 66*aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, 67355da1ebSSage Weil size_t size) 68355da1ebSSage Weil { 69355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rsubdirs); 70355da1ebSSage Weil } 71355da1ebSSage Weil 72*aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, 73355da1ebSSage Weil size_t size) 74355da1ebSSage Weil { 75355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rbytes); 76355da1ebSSage Weil } 77355da1ebSSage Weil 78*aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, 79355da1ebSSage Weil size_t size) 80355da1ebSSage Weil { 81355da1ebSSage Weil return snprintf(val, size, "%ld.%ld", (long)ci->i_rctime.tv_sec, 82355da1ebSSage Weil (long)ci->i_rctime.tv_nsec); 83355da1ebSSage Weil } 84355da1ebSSage Weil 85eb788084SAlex Elder #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name 86eb788084SAlex Elder 87eb788084SAlex Elder #define XATTR_NAME_CEPH(_type, _name) \ 88eb788084SAlex Elder { \ 89eb788084SAlex Elder .name = CEPH_XATTR_NAME(_type, _name), \ 90*aa4066edSAlex Elder .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ 91eb788084SAlex Elder .readonly = true, \ 92eb788084SAlex Elder } 93eb788084SAlex Elder 94881a5fa2SAlex Elder static struct ceph_vxattr ceph_dir_vxattrs[] = { 95eb788084SAlex Elder XATTR_NAME_CEPH(dir, entries), 96eb788084SAlex Elder XATTR_NAME_CEPH(dir, files), 97eb788084SAlex Elder XATTR_NAME_CEPH(dir, subdirs), 98eb788084SAlex Elder XATTR_NAME_CEPH(dir, rentries), 99eb788084SAlex Elder XATTR_NAME_CEPH(dir, rfiles), 100eb788084SAlex Elder XATTR_NAME_CEPH(dir, rsubdirs), 101eb788084SAlex Elder XATTR_NAME_CEPH(dir, rbytes), 102eb788084SAlex Elder XATTR_NAME_CEPH(dir, rctime), 103eb788084SAlex Elder { 0 } /* Required table terminator */ 104355da1ebSSage Weil }; 105355da1ebSSage Weil 106355da1ebSSage Weil /* files */ 107355da1ebSSage Weil 108*aa4066edSAlex Elder static size_t ceph_vxattrcb_file_layout(struct ceph_inode_info *ci, char *val, 109355da1ebSSage Weil size_t size) 110355da1ebSSage Weil { 111b195befdSSage Weil int ret; 112b195befdSSage Weil 113b195befdSSage Weil ret = snprintf(val, size, 114355da1ebSSage Weil "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n", 115355da1ebSSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 116355da1ebSSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 117355da1ebSSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); 118b195befdSSage Weil if (ceph_file_layout_pg_preferred(ci->i_layout)) 119b195befdSSage Weil ret += snprintf(val + ret, size, "preferred_osd=%lld\n", 120b195befdSSage Weil (unsigned long long)ceph_file_layout_pg_preferred( 121b195befdSSage Weil 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), 127114fc474SAlex Elder /* The following extended attribute name is deprecated */ 128eb788084SAlex Elder { 129eb788084SAlex Elder .name = XATTR_CEPH_PREFIX "layout", 130*aa4066edSAlex Elder .getxattr_cb = ceph_vxattrcb_file_layout, 131eb788084SAlex Elder .readonly = true, 132eb788084SAlex Elder }, 133eb788084SAlex Elder { 0 } /* Required table terminator */ 134355da1ebSSage Weil }; 135355da1ebSSage Weil 136881a5fa2SAlex Elder static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) 137355da1ebSSage Weil { 138355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 139355da1ebSSage Weil return ceph_dir_vxattrs; 140355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 141355da1ebSSage Weil return ceph_file_vxattrs; 142355da1ebSSage Weil return NULL; 143355da1ebSSage Weil } 144355da1ebSSage Weil 145881a5fa2SAlex Elder static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, 146355da1ebSSage Weil const char *name) 147355da1ebSSage Weil { 148881a5fa2SAlex Elder struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); 14906476a69SAlex Elder 15006476a69SAlex Elder if (vxattr) { 15106476a69SAlex Elder while (vxattr->name) { 15206476a69SAlex Elder if (!strcmp(vxattr->name, name)) 153355da1ebSSage Weil return vxattr; 154355da1ebSSage Weil vxattr++; 15506476a69SAlex Elder } 15606476a69SAlex Elder } 15706476a69SAlex Elder 158355da1ebSSage Weil return NULL; 159355da1ebSSage Weil } 160355da1ebSSage Weil 161355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 162355da1ebSSage Weil const char *name, int name_len, 163355da1ebSSage Weil const char *val, int val_len, 164355da1ebSSage Weil int dirty, 165355da1ebSSage Weil int should_free_name, int should_free_val, 166355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 167355da1ebSSage Weil { 168355da1ebSSage Weil struct rb_node **p; 169355da1ebSSage Weil struct rb_node *parent = NULL; 170355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 171355da1ebSSage Weil int c; 172355da1ebSSage Weil int new = 0; 173355da1ebSSage Weil 174355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 175355da1ebSSage Weil while (*p) { 176355da1ebSSage Weil parent = *p; 177355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 178355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 179355da1ebSSage Weil if (c < 0) 180355da1ebSSage Weil p = &(*p)->rb_left; 181355da1ebSSage Weil else if (c > 0) 182355da1ebSSage Weil p = &(*p)->rb_right; 183355da1ebSSage Weil else { 184355da1ebSSage Weil if (name_len == xattr->name_len) 185355da1ebSSage Weil break; 186355da1ebSSage Weil else if (name_len < xattr->name_len) 187355da1ebSSage Weil p = &(*p)->rb_left; 188355da1ebSSage Weil else 189355da1ebSSage Weil p = &(*p)->rb_right; 190355da1ebSSage Weil } 191355da1ebSSage Weil xattr = NULL; 192355da1ebSSage Weil } 193355da1ebSSage Weil 194355da1ebSSage Weil if (!xattr) { 195355da1ebSSage Weil new = 1; 196355da1ebSSage Weil xattr = *newxattr; 197355da1ebSSage Weil xattr->name = name; 198355da1ebSSage Weil xattr->name_len = name_len; 199355da1ebSSage Weil xattr->should_free_name = should_free_name; 200355da1ebSSage Weil 201355da1ebSSage Weil ci->i_xattrs.count++; 202355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 203355da1ebSSage Weil } else { 204355da1ebSSage Weil kfree(*newxattr); 205355da1ebSSage Weil *newxattr = NULL; 206355da1ebSSage Weil if (xattr->should_free_val) 207355da1ebSSage Weil kfree((void *)xattr->val); 208355da1ebSSage Weil 209355da1ebSSage Weil if (should_free_name) { 210355da1ebSSage Weil kfree((void *)name); 211355da1ebSSage Weil name = xattr->name; 212355da1ebSSage Weil } 213355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 214355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 215355da1ebSSage Weil } 216355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 217355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 218355da1ebSSage Weil if (val) 219355da1ebSSage Weil xattr->val = val; 220355da1ebSSage Weil else 221355da1ebSSage Weil xattr->val = ""; 222355da1ebSSage Weil 223355da1ebSSage Weil xattr->val_len = val_len; 224355da1ebSSage Weil xattr->dirty = dirty; 225355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 226355da1ebSSage Weil 227355da1ebSSage Weil if (new) { 228355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 229355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 230355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 231355da1ebSSage Weil } 232355da1ebSSage Weil 233355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 234355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 235355da1ebSSage Weil 236355da1ebSSage Weil return 0; 237355da1ebSSage Weil } 238355da1ebSSage Weil 239355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 240355da1ebSSage Weil const char *name) 241355da1ebSSage Weil { 242355da1ebSSage Weil struct rb_node **p; 243355da1ebSSage Weil struct rb_node *parent = NULL; 244355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 24517db143fSSage Weil int name_len = strlen(name); 246355da1ebSSage Weil int c; 247355da1ebSSage Weil 248355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 249355da1ebSSage Weil while (*p) { 250355da1ebSSage Weil parent = *p; 251355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 252355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 25317db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 25417db143fSSage Weil c = 1; 255355da1ebSSage Weil if (c < 0) 256355da1ebSSage Weil p = &(*p)->rb_left; 257355da1ebSSage Weil else if (c > 0) 258355da1ebSSage Weil p = &(*p)->rb_right; 259355da1ebSSage Weil else { 260355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 261355da1ebSSage Weil xattr->val_len, xattr->val); 262355da1ebSSage Weil return xattr; 263355da1ebSSage Weil } 264355da1ebSSage Weil } 265355da1ebSSage Weil 266355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 267355da1ebSSage Weil 268355da1ebSSage Weil return NULL; 269355da1ebSSage Weil } 270355da1ebSSage Weil 271355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 272355da1ebSSage Weil { 273355da1ebSSage Weil BUG_ON(!xattr); 274355da1ebSSage Weil 275355da1ebSSage Weil if (xattr->should_free_name) 276355da1ebSSage Weil kfree((void *)xattr->name); 277355da1ebSSage Weil if (xattr->should_free_val) 278355da1ebSSage Weil kfree((void *)xattr->val); 279355da1ebSSage Weil 280355da1ebSSage Weil kfree(xattr); 281355da1ebSSage Weil } 282355da1ebSSage Weil 283355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 284355da1ebSSage Weil struct ceph_inode_xattr *xattr) 285355da1ebSSage Weil { 286355da1ebSSage Weil if (!xattr) 287355da1ebSSage Weil return -EOPNOTSUPP; 288355da1ebSSage Weil 289355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 290355da1ebSSage Weil 291355da1ebSSage Weil if (xattr->should_free_name) 292355da1ebSSage Weil kfree((void *)xattr->name); 293355da1ebSSage Weil if (xattr->should_free_val) 294355da1ebSSage Weil kfree((void *)xattr->val); 295355da1ebSSage Weil 296355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 297355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 298355da1ebSSage Weil ci->i_xattrs.count--; 299355da1ebSSage Weil kfree(xattr); 300355da1ebSSage Weil 301355da1ebSSage Weil return 0; 302355da1ebSSage Weil } 303355da1ebSSage Weil 304355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 305355da1ebSSage Weil const char *name) 306355da1ebSSage Weil { 307355da1ebSSage Weil struct rb_node **p; 308355da1ebSSage Weil struct ceph_inode_xattr *xattr; 309355da1ebSSage Weil int err; 310355da1ebSSage Weil 311355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 312355da1ebSSage Weil xattr = __get_xattr(ci, name); 313355da1ebSSage Weil err = __remove_xattr(ci, xattr); 314355da1ebSSage Weil return err; 315355da1ebSSage Weil } 316355da1ebSSage Weil 317355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 318355da1ebSSage Weil char *dest) 319355da1ebSSage Weil { 320355da1ebSSage Weil struct rb_node *p; 321355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 322355da1ebSSage Weil 323355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 324355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 325355da1ebSSage Weil 326355da1ebSSage Weil while (p) { 327355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 328355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 329355da1ebSSage Weil dest[xattr->name_len] = '\0'; 330355da1ebSSage Weil 331355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 332355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 333355da1ebSSage Weil 334355da1ebSSage Weil dest += xattr->name_len + 1; 335355da1ebSSage Weil p = rb_next(p); 336355da1ebSSage Weil } 337355da1ebSSage Weil 338355da1ebSSage Weil return dest; 339355da1ebSSage Weil } 340355da1ebSSage Weil 341355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 342355da1ebSSage Weil { 343355da1ebSSage Weil struct rb_node *p, *tmp; 344355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 345355da1ebSSage Weil 346355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 347355da1ebSSage Weil 348355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 349355da1ebSSage Weil 350355da1ebSSage Weil while (p) { 351355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 352355da1ebSSage Weil tmp = p; 353355da1ebSSage Weil p = rb_next(tmp); 354355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 355355da1ebSSage Weil xattr->name_len, xattr->name); 356355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 357355da1ebSSage Weil 358355da1ebSSage Weil __free_xattr(xattr); 359355da1ebSSage Weil } 360355da1ebSSage Weil 361355da1ebSSage Weil ci->i_xattrs.names_size = 0; 362355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 363355da1ebSSage Weil ci->i_xattrs.index_version = 0; 364355da1ebSSage Weil ci->i_xattrs.count = 0; 365355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 366355da1ebSSage Weil } 367355da1ebSSage Weil 368355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 369be655596SSage Weil __releases(ci->i_ceph_lock) 370be655596SSage Weil __acquires(ci->i_ceph_lock) 371355da1ebSSage Weil { 372355da1ebSSage Weil u32 namelen; 373355da1ebSSage Weil u32 numattr = 0; 374355da1ebSSage Weil void *p, *end; 375355da1ebSSage Weil u32 len; 376355da1ebSSage Weil const char *name, *val; 377355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 378355da1ebSSage Weil int xattr_version; 379355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 38063ff78b2SSage Weil int err = 0; 381355da1ebSSage Weil int i; 382355da1ebSSage Weil 383355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 384355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 385355da1ebSSage Weil 386355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 387355da1ebSSage Weil return 0; /* already built */ 388355da1ebSSage Weil 389355da1ebSSage Weil __ceph_destroy_xattrs(ci); 390355da1ebSSage Weil 391355da1ebSSage Weil start: 392355da1ebSSage Weil /* updated internal xattr rb tree */ 393355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 394355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 395355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 396355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 397355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 398be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 399355da1ebSSage Weil 400355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 401355da1ebSSage Weil GFP_NOFS); 402355da1ebSSage Weil err = -ENOMEM; 403355da1ebSSage Weil if (!xattrs) 404355da1ebSSage Weil goto bad_lock; 405355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 406355da1ebSSage Weil for (i = 0; i < numattr; i++) { 407355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 408355da1ebSSage Weil GFP_NOFS); 409355da1ebSSage Weil if (!xattrs[i]) 410355da1ebSSage Weil goto bad_lock; 411355da1ebSSage Weil } 412355da1ebSSage Weil 413be655596SSage Weil spin_lock(&ci->i_ceph_lock); 414355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 415355da1ebSSage Weil /* lost a race, retry */ 416355da1ebSSage Weil for (i = 0; i < numattr; i++) 417355da1ebSSage Weil kfree(xattrs[i]); 418355da1ebSSage Weil kfree(xattrs); 419355da1ebSSage Weil goto start; 420355da1ebSSage Weil } 421355da1ebSSage Weil err = -EIO; 422355da1ebSSage Weil while (numattr--) { 423355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 424355da1ebSSage Weil namelen = len; 425355da1ebSSage Weil name = p; 426355da1ebSSage Weil p += len; 427355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 428355da1ebSSage Weil val = p; 429355da1ebSSage Weil p += len; 430355da1ebSSage Weil 431355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 432355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 433355da1ebSSage Weil 434355da1ebSSage Weil if (err < 0) 435355da1ebSSage Weil goto bad; 436355da1ebSSage Weil } 437355da1ebSSage Weil kfree(xattrs); 438355da1ebSSage Weil } 439355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 440355da1ebSSage Weil ci->i_xattrs.dirty = false; 441355da1ebSSage Weil 442355da1ebSSage Weil return err; 443355da1ebSSage Weil bad_lock: 444be655596SSage Weil spin_lock(&ci->i_ceph_lock); 445355da1ebSSage Weil bad: 446355da1ebSSage Weil if (xattrs) { 447355da1ebSSage Weil for (i = 0; i < numattr; i++) 448355da1ebSSage Weil kfree(xattrs[i]); 449355da1ebSSage Weil kfree(xattrs); 450355da1ebSSage Weil } 451355da1ebSSage Weil ci->i_xattrs.names_size = 0; 452355da1ebSSage Weil return err; 453355da1ebSSage Weil } 454355da1ebSSage Weil 455355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 456355da1ebSSage Weil int val_size) 457355da1ebSSage Weil { 458355da1ebSSage Weil /* 459355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 460355da1ebSSage Weil * 4 bytes per each value 461355da1ebSSage Weil */ 462355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 463355da1ebSSage Weil ci->i_xattrs.names_size + 464355da1ebSSage Weil ci->i_xattrs.vals_size; 465355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 466355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 467355da1ebSSage Weil ci->i_xattrs.vals_size); 468355da1ebSSage Weil 469355da1ebSSage Weil if (name_size) 470355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 471355da1ebSSage Weil 472355da1ebSSage Weil return size; 473355da1ebSSage Weil } 474355da1ebSSage Weil 475355da1ebSSage Weil /* 476355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 477355da1ebSSage Weil * and swap into place. 478355da1ebSSage Weil */ 479355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 480355da1ebSSage Weil { 481355da1ebSSage Weil struct rb_node *p; 482355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 483355da1ebSSage Weil void *dest; 484355da1ebSSage Weil 485355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 486355da1ebSSage Weil if (ci->i_xattrs.dirty) { 487355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 488355da1ebSSage Weil 489355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 490355da1ebSSage Weil 491355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 492355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 493355da1ebSSage Weil 494355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 495355da1ebSSage Weil while (p) { 496355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 497355da1ebSSage Weil 498355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 499355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 500355da1ebSSage Weil dest += xattr->name_len; 501355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 502355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 503355da1ebSSage Weil dest += xattr->val_len; 504355da1ebSSage Weil 505355da1ebSSage Weil p = rb_next(p); 506355da1ebSSage Weil } 507355da1ebSSage Weil 508355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 509355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 510355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 511355da1ebSSage Weil 512b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 513355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 514355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 515355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 516355da1ebSSage Weil ci->i_xattrs.dirty = false; 5174a625be4SSage Weil ci->i_xattrs.version++; 518355da1ebSSage Weil } 519355da1ebSSage Weil } 520355da1ebSSage Weil 521355da1ebSSage Weil ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 522355da1ebSSage Weil size_t size) 523355da1ebSSage Weil { 524355da1ebSSage Weil struct inode *inode = dentry->d_inode; 525355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 526355da1ebSSage Weil int err; 527355da1ebSSage Weil struct ceph_inode_xattr *xattr; 528881a5fa2SAlex Elder struct ceph_vxattr *vxattr = NULL; 529355da1ebSSage Weil 530355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 531355da1ebSSage Weil return -ENODATA; 532355da1ebSSage Weil 533355da1ebSSage Weil /* let's see if a virtual xattr was requested */ 53406476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 535355da1ebSSage Weil 536be655596SSage Weil spin_lock(&ci->i_ceph_lock); 537355da1ebSSage Weil dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 538355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 539355da1ebSSage Weil 540355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 541355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 542355da1ebSSage Weil goto get_xattr; 543355da1ebSSage Weil } else { 544be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 545355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 546355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 547355da1ebSSage Weil if (err) 548355da1ebSSage Weil return err; 549355da1ebSSage Weil } 550355da1ebSSage Weil 551be655596SSage Weil spin_lock(&ci->i_ceph_lock); 552355da1ebSSage Weil 553355da1ebSSage Weil if (vxattr && vxattr->readonly) { 554355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 555355da1ebSSage Weil goto out; 556355da1ebSSage Weil } 557355da1ebSSage Weil 558355da1ebSSage Weil err = __build_xattrs(inode); 559355da1ebSSage Weil if (err < 0) 560355da1ebSSage Weil goto out; 561355da1ebSSage Weil 562355da1ebSSage Weil get_xattr: 563355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 564355da1ebSSage Weil xattr = __get_xattr(ci, name); 565355da1ebSSage Weil if (!xattr) { 566355da1ebSSage Weil if (vxattr) 567355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 568355da1ebSSage Weil goto out; 569355da1ebSSage Weil } 570355da1ebSSage Weil 571355da1ebSSage Weil err = -ERANGE; 572355da1ebSSage Weil if (size && size < xattr->val_len) 573355da1ebSSage Weil goto out; 574355da1ebSSage Weil 575355da1ebSSage Weil err = xattr->val_len; 576355da1ebSSage Weil if (size == 0) 577355da1ebSSage Weil goto out; 578355da1ebSSage Weil 579355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 580355da1ebSSage Weil 581355da1ebSSage Weil out: 582be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 583355da1ebSSage Weil return err; 584355da1ebSSage Weil } 585355da1ebSSage Weil 586355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 587355da1ebSSage Weil { 588355da1ebSSage Weil struct inode *inode = dentry->d_inode; 589355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 590881a5fa2SAlex Elder struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); 591355da1ebSSage Weil u32 vir_namelen = 0; 592355da1ebSSage Weil u32 namelen; 593355da1ebSSage Weil int err; 594355da1ebSSage Weil u32 len; 595355da1ebSSage Weil int i; 596355da1ebSSage Weil 597be655596SSage Weil spin_lock(&ci->i_ceph_lock); 598355da1ebSSage Weil dout("listxattr %p ver=%lld index_ver=%lld\n", inode, 599355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 600355da1ebSSage Weil 601355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 602bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 603355da1ebSSage Weil goto list_xattr; 604355da1ebSSage Weil } else { 605be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 606355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 607355da1ebSSage Weil if (err) 608355da1ebSSage Weil return err; 609355da1ebSSage Weil } 610355da1ebSSage Weil 611be655596SSage Weil spin_lock(&ci->i_ceph_lock); 612355da1ebSSage Weil 613355da1ebSSage Weil err = __build_xattrs(inode); 614355da1ebSSage Weil if (err < 0) 615355da1ebSSage Weil goto out; 616355da1ebSSage Weil 617355da1ebSSage Weil list_xattr: 618355da1ebSSage Weil vir_namelen = 0; 619355da1ebSSage Weil /* include virtual dir xattrs */ 620355da1ebSSage Weil if (vxattrs) 621355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) 622355da1ebSSage Weil vir_namelen += strlen(vxattrs[i].name) + 1; 623355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 624355da1ebSSage Weil namelen = vir_namelen + ci->i_xattrs.names_size + ci->i_xattrs.count; 625355da1ebSSage Weil err = -ERANGE; 626355da1ebSSage Weil if (size && namelen > size) 627355da1ebSSage Weil goto out; 628355da1ebSSage Weil 629355da1ebSSage Weil err = namelen; 630355da1ebSSage Weil if (size == 0) 631355da1ebSSage Weil goto out; 632355da1ebSSage Weil 633355da1ebSSage Weil names = __copy_xattr_names(ci, names); 634355da1ebSSage Weil 635355da1ebSSage Weil /* virtual xattr names, too */ 636355da1ebSSage Weil if (vxattrs) 637355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 638355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 639355da1ebSSage Weil names += len + 1; 640355da1ebSSage Weil } 641355da1ebSSage Weil 642355da1ebSSage Weil out: 643be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 644355da1ebSSage Weil return err; 645355da1ebSSage Weil } 646355da1ebSSage Weil 647355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 648355da1ebSSage Weil const char *value, size_t size, int flags) 649355da1ebSSage Weil { 6503d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 651355da1ebSSage Weil struct inode *inode = dentry->d_inode; 652355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 6535f21c96dSSage Weil struct inode *parent_inode; 654355da1ebSSage Weil struct ceph_mds_request *req; 6553d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 656355da1ebSSage Weil int err; 657355da1ebSSage Weil int i, nr_pages; 658355da1ebSSage Weil struct page **pages = NULL; 659355da1ebSSage Weil void *kaddr; 660355da1ebSSage Weil 661355da1ebSSage Weil /* copy value into some pages */ 662355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 663355da1ebSSage Weil if (nr_pages) { 664355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 665355da1ebSSage Weil if (!pages) 666355da1ebSSage Weil return -ENOMEM; 667355da1ebSSage Weil err = -ENOMEM; 668355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 66931459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 670355da1ebSSage Weil if (!pages[i]) { 671355da1ebSSage Weil nr_pages = i; 672355da1ebSSage Weil goto out; 673355da1ebSSage Weil } 674355da1ebSSage Weil kaddr = kmap(pages[i]); 675355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 676355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 677355da1ebSSage Weil } 678355da1ebSSage Weil } 679355da1ebSSage Weil 680355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 681355da1ebSSage Weil 682355da1ebSSage Weil /* do request */ 683355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 684355da1ebSSage Weil USE_AUTH_MDS); 68560d87733SJulia Lawall if (IS_ERR(req)) { 68660d87733SJulia Lawall err = PTR_ERR(req); 68760d87733SJulia Lawall goto out; 68860d87733SJulia Lawall } 68970b666c3SSage Weil req->r_inode = inode; 69070b666c3SSage Weil ihold(inode); 691355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 692355da1ebSSage Weil req->r_num_caps = 1; 693355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 694355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 695355da1ebSSage Weil 696355da1ebSSage Weil req->r_pages = pages; 697355da1ebSSage Weil req->r_num_pages = nr_pages; 698355da1ebSSage Weil req->r_data_len = size; 699355da1ebSSage Weil 700355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 7015f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 702355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 7035f21c96dSSage Weil iput(parent_inode); 704355da1ebSSage Weil ceph_mdsc_put_request(req); 705355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 706355da1ebSSage Weil 707355da1ebSSage Weil out: 708355da1ebSSage Weil if (pages) { 709355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 710355da1ebSSage Weil __free_page(pages[i]); 711355da1ebSSage Weil kfree(pages); 712355da1ebSSage Weil } 713355da1ebSSage Weil return err; 714355da1ebSSage Weil } 715355da1ebSSage Weil 716355da1ebSSage Weil int ceph_setxattr(struct dentry *dentry, const char *name, 717355da1ebSSage Weil const void *value, size_t size, int flags) 718355da1ebSSage Weil { 719355da1ebSSage Weil struct inode *inode = dentry->d_inode; 720881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 721355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 722355da1ebSSage Weil int err; 723355da1ebSSage Weil int name_len = strlen(name); 724355da1ebSSage Weil int val_len = size; 725355da1ebSSage Weil char *newname = NULL; 726355da1ebSSage Weil char *newval = NULL; 727355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 728355da1ebSSage Weil int issued; 729355da1ebSSage Weil int required_blob_size; 730fca65b4aSSage Weil int dirty; 731355da1ebSSage Weil 732355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 733355da1ebSSage Weil return -EROFS; 734355da1ebSSage Weil 735355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 736355da1ebSSage Weil return -EOPNOTSUPP; 737355da1ebSSage Weil 73806476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 739355da1ebSSage Weil if (vxattr && vxattr->readonly) 740355da1ebSSage Weil return -EOPNOTSUPP; 741355da1ebSSage Weil 742355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 743355da1ebSSage Weil err = -ENOMEM; 74461413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 745355da1ebSSage Weil if (!newname) 746355da1ebSSage Weil goto out; 747355da1ebSSage Weil 748355da1ebSSage Weil if (val_len) { 749b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 750355da1ebSSage Weil if (!newval) 751355da1ebSSage Weil goto out; 752355da1ebSSage Weil } 753355da1ebSSage Weil 754355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 755355da1ebSSage Weil if (!xattr) 756355da1ebSSage Weil goto out; 757355da1ebSSage Weil 758be655596SSage Weil spin_lock(&ci->i_ceph_lock); 759355da1ebSSage Weil retry: 760355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 761355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 762355da1ebSSage Weil goto do_sync; 763355da1ebSSage Weil __build_xattrs(inode); 764355da1ebSSage Weil 765355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 766355da1ebSSage Weil 767355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 768355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 769355da1ebSSage Weil struct ceph_buffer *blob = NULL; 770355da1ebSSage Weil 771be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 772355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 773b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 774355da1ebSSage Weil if (!blob) 775355da1ebSSage Weil goto out; 776be655596SSage Weil spin_lock(&ci->i_ceph_lock); 777b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 778355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 779355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 780355da1ebSSage Weil goto retry; 781355da1ebSSage Weil } 782355da1ebSSage Weil 783355da1ebSSage Weil dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 784355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 785355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 786fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 787355da1ebSSage Weil ci->i_xattrs.dirty = true; 788355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 789be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 790fca65b4aSSage Weil if (dirty) 791fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 792355da1ebSSage Weil return err; 793355da1ebSSage Weil 794355da1ebSSage Weil do_sync: 795be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 796355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 797355da1ebSSage Weil out: 798355da1ebSSage Weil kfree(newname); 799355da1ebSSage Weil kfree(newval); 800355da1ebSSage Weil kfree(xattr); 801355da1ebSSage Weil return err; 802355da1ebSSage Weil } 803355da1ebSSage Weil 804355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 805355da1ebSSage Weil { 8063d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 8073d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 808355da1ebSSage Weil struct inode *inode = dentry->d_inode; 8095f21c96dSSage Weil struct inode *parent_inode; 810355da1ebSSage Weil struct ceph_mds_request *req; 811355da1ebSSage Weil int err; 812355da1ebSSage Weil 813355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 814355da1ebSSage Weil USE_AUTH_MDS); 815355da1ebSSage Weil if (IS_ERR(req)) 816355da1ebSSage Weil return PTR_ERR(req); 81770b666c3SSage Weil req->r_inode = inode; 81870b666c3SSage Weil ihold(inode); 819355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 820355da1ebSSage Weil req->r_num_caps = 1; 821355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 822355da1ebSSage Weil 8235f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 824355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 8255f21c96dSSage Weil iput(parent_inode); 826355da1ebSSage Weil ceph_mdsc_put_request(req); 827355da1ebSSage Weil return err; 828355da1ebSSage Weil } 829355da1ebSSage Weil 830355da1ebSSage Weil int ceph_removexattr(struct dentry *dentry, const char *name) 831355da1ebSSage Weil { 832355da1ebSSage Weil struct inode *inode = dentry->d_inode; 833881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 834355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 835355da1ebSSage Weil int issued; 836355da1ebSSage Weil int err; 83783eb26afSAlex Elder int required_blob_size; 838fca65b4aSSage Weil int dirty; 839355da1ebSSage Weil 840355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 841355da1ebSSage Weil return -EROFS; 842355da1ebSSage Weil 843355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 844355da1ebSSage Weil return -EOPNOTSUPP; 845355da1ebSSage Weil 84606476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 847355da1ebSSage Weil if (vxattr && vxattr->readonly) 848355da1ebSSage Weil return -EOPNOTSUPP; 849355da1ebSSage Weil 85083eb26afSAlex Elder err = -ENOMEM; 851be655596SSage Weil spin_lock(&ci->i_ceph_lock); 852355da1ebSSage Weil __build_xattrs(inode); 85383eb26afSAlex Elder retry: 854355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 855355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 856355da1ebSSage Weil 857355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 858355da1ebSSage Weil goto do_sync; 859355da1ebSSage Weil 86083eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 86183eb26afSAlex Elder 86283eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 86383eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 86483eb26afSAlex Elder struct ceph_buffer *blob; 86583eb26afSAlex Elder 86683eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 86783eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 86883eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 86983eb26afSAlex Elder if (!blob) 87083eb26afSAlex Elder goto out; 87183eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 87283eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 87383eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 87483eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 87583eb26afSAlex Elder goto retry; 87683eb26afSAlex Elder } 87783eb26afSAlex Elder 878355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 879fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 880355da1ebSSage Weil ci->i_xattrs.dirty = true; 881355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 882355da1ebSSage Weil 883be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 884fca65b4aSSage Weil if (dirty) 885fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 886355da1ebSSage Weil return err; 887355da1ebSSage Weil do_sync: 888be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 889355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 89083eb26afSAlex Elder out: 891355da1ebSSage Weil return err; 892355da1ebSSage Weil } 893355da1ebSSage Weil 894