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 11355da1ebSSage Weil static bool ceph_is_valid_xattr(const char *name) 12355da1ebSSage Weil { 131a756278SSage Weil return !strncmp(name, "ceph.", 5) || 141a756278SSage Weil !strncmp(name, XATTR_SECURITY_PREFIX, 15355da1ebSSage Weil XATTR_SECURITY_PREFIX_LEN) || 16355da1ebSSage Weil !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || 17355da1ebSSage Weil !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 18355da1ebSSage Weil } 19355da1ebSSage Weil 20355da1ebSSage Weil /* 21355da1ebSSage Weil * These define virtual xattrs exposing the recursive directory 22355da1ebSSage Weil * statistics and layout metadata. 23355da1ebSSage Weil */ 24355da1ebSSage Weil struct ceph_vxattr_cb { 25355da1ebSSage Weil bool readonly; 26355da1ebSSage Weil char *name; 27355da1ebSSage Weil size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, 28355da1ebSSage Weil size_t size); 29355da1ebSSage Weil }; 30355da1ebSSage Weil 31355da1ebSSage Weil /* directories */ 32355da1ebSSage Weil 33355da1ebSSage Weil static size_t ceph_vxattrcb_entries(struct ceph_inode_info *ci, char *val, 34355da1ebSSage Weil size_t size) 35355da1ebSSage Weil { 36355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); 37355da1ebSSage Weil } 38355da1ebSSage Weil 39355da1ebSSage Weil static size_t ceph_vxattrcb_files(struct ceph_inode_info *ci, char *val, 40355da1ebSSage Weil size_t size) 41355da1ebSSage Weil { 42355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files); 43355da1ebSSage Weil } 44355da1ebSSage Weil 45355da1ebSSage Weil static size_t ceph_vxattrcb_subdirs(struct ceph_inode_info *ci, char *val, 46355da1ebSSage Weil size_t size) 47355da1ebSSage Weil { 48355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_subdirs); 49355da1ebSSage Weil } 50355da1ebSSage Weil 51355da1ebSSage Weil static size_t ceph_vxattrcb_rentries(struct ceph_inode_info *ci, char *val, 52355da1ebSSage Weil size_t size) 53355da1ebSSage Weil { 54355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); 55355da1ebSSage Weil } 56355da1ebSSage Weil 57355da1ebSSage Weil static size_t ceph_vxattrcb_rfiles(struct ceph_inode_info *ci, char *val, 58355da1ebSSage Weil size_t size) 59355da1ebSSage Weil { 60355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles); 61355da1ebSSage Weil } 62355da1ebSSage Weil 63355da1ebSSage Weil static size_t ceph_vxattrcb_rsubdirs(struct ceph_inode_info *ci, char *val, 64355da1ebSSage Weil size_t size) 65355da1ebSSage Weil { 66355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rsubdirs); 67355da1ebSSage Weil } 68355da1ebSSage Weil 69355da1ebSSage Weil static size_t ceph_vxattrcb_rbytes(struct ceph_inode_info *ci, char *val, 70355da1ebSSage Weil size_t size) 71355da1ebSSage Weil { 72355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rbytes); 73355da1ebSSage Weil } 74355da1ebSSage Weil 75355da1ebSSage Weil static size_t ceph_vxattrcb_rctime(struct ceph_inode_info *ci, char *val, 76355da1ebSSage Weil size_t size) 77355da1ebSSage Weil { 78355da1ebSSage Weil return snprintf(val, size, "%ld.%ld", (long)ci->i_rctime.tv_sec, 79355da1ebSSage Weil (long)ci->i_rctime.tv_nsec); 80355da1ebSSage Weil } 81355da1ebSSage Weil 82355da1ebSSage Weil static struct ceph_vxattr_cb ceph_dir_vxattrs[] = { 831a756278SSage Weil { true, "ceph.dir.entries", ceph_vxattrcb_entries}, 841a756278SSage Weil { true, "ceph.dir.files", ceph_vxattrcb_files}, 851a756278SSage Weil { true, "ceph.dir.subdirs", ceph_vxattrcb_subdirs}, 861a756278SSage Weil { true, "ceph.dir.rentries", ceph_vxattrcb_rentries}, 871a756278SSage Weil { true, "ceph.dir.rfiles", ceph_vxattrcb_rfiles}, 881a756278SSage Weil { true, "ceph.dir.rsubdirs", ceph_vxattrcb_rsubdirs}, 891a756278SSage Weil { true, "ceph.dir.rbytes", ceph_vxattrcb_rbytes}, 901a756278SSage Weil { true, "ceph.dir.rctime", ceph_vxattrcb_rctime}, 91355da1ebSSage Weil { true, NULL, NULL } 92355da1ebSSage Weil }; 93355da1ebSSage Weil 94355da1ebSSage Weil /* files */ 95355da1ebSSage Weil 96355da1ebSSage Weil static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, 97355da1ebSSage Weil size_t size) 98355da1ebSSage Weil { 99b195befdSSage Weil int ret; 100b195befdSSage Weil 101b195befdSSage Weil ret = snprintf(val, size, 102355da1ebSSage Weil "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n", 103355da1ebSSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 104355da1ebSSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 105355da1ebSSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); 106b195befdSSage Weil if (ceph_file_layout_pg_preferred(ci->i_layout)) 107b195befdSSage Weil ret += snprintf(val + ret, size, "preferred_osd=%lld\n", 108b195befdSSage Weil (unsigned long long)ceph_file_layout_pg_preferred( 109b195befdSSage Weil ci->i_layout)); 110b195befdSSage Weil return ret; 111355da1ebSSage Weil } 112355da1ebSSage Weil 113355da1ebSSage Weil static struct ceph_vxattr_cb ceph_file_vxattrs[] = { 114114fc474SAlex Elder { true, "ceph.file.layout", ceph_vxattrcb_layout}, 115114fc474SAlex Elder /* The following extended attribute name is deprecated */ 1161a756278SSage Weil { true, "ceph.layout", ceph_vxattrcb_layout}, 117114fc474SAlex Elder { true, NULL, NULL } 118355da1ebSSage Weil }; 119355da1ebSSage Weil 120355da1ebSSage Weil static struct ceph_vxattr_cb *ceph_inode_vxattrs(struct inode *inode) 121355da1ebSSage Weil { 122355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 123355da1ebSSage Weil return ceph_dir_vxattrs; 124355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 125355da1ebSSage Weil return ceph_file_vxattrs; 126355da1ebSSage Weil return NULL; 127355da1ebSSage Weil } 128355da1ebSSage Weil 129*06476a69SAlex Elder static struct ceph_vxattr_cb *ceph_match_vxattr(struct inode *inode, 130355da1ebSSage Weil const char *name) 131355da1ebSSage Weil { 132*06476a69SAlex Elder struct ceph_vxattr_cb *vxattr = ceph_inode_vxattrs(inode); 133*06476a69SAlex Elder 134*06476a69SAlex Elder if (vxattr) { 135*06476a69SAlex Elder while (vxattr->name) { 136*06476a69SAlex Elder if (!strcmp(vxattr->name, name)) 137355da1ebSSage Weil return vxattr; 138355da1ebSSage Weil vxattr++; 139*06476a69SAlex Elder } 140*06476a69SAlex Elder } 141*06476a69SAlex Elder 142355da1ebSSage Weil return NULL; 143355da1ebSSage Weil } 144355da1ebSSage Weil 145355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 146355da1ebSSage Weil const char *name, int name_len, 147355da1ebSSage Weil const char *val, int val_len, 148355da1ebSSage Weil int dirty, 149355da1ebSSage Weil int should_free_name, int should_free_val, 150355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 151355da1ebSSage Weil { 152355da1ebSSage Weil struct rb_node **p; 153355da1ebSSage Weil struct rb_node *parent = NULL; 154355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 155355da1ebSSage Weil int c; 156355da1ebSSage Weil int new = 0; 157355da1ebSSage Weil 158355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 159355da1ebSSage Weil while (*p) { 160355da1ebSSage Weil parent = *p; 161355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 162355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 163355da1ebSSage Weil if (c < 0) 164355da1ebSSage Weil p = &(*p)->rb_left; 165355da1ebSSage Weil else if (c > 0) 166355da1ebSSage Weil p = &(*p)->rb_right; 167355da1ebSSage Weil else { 168355da1ebSSage Weil if (name_len == xattr->name_len) 169355da1ebSSage Weil break; 170355da1ebSSage Weil else if (name_len < xattr->name_len) 171355da1ebSSage Weil p = &(*p)->rb_left; 172355da1ebSSage Weil else 173355da1ebSSage Weil p = &(*p)->rb_right; 174355da1ebSSage Weil } 175355da1ebSSage Weil xattr = NULL; 176355da1ebSSage Weil } 177355da1ebSSage Weil 178355da1ebSSage Weil if (!xattr) { 179355da1ebSSage Weil new = 1; 180355da1ebSSage Weil xattr = *newxattr; 181355da1ebSSage Weil xattr->name = name; 182355da1ebSSage Weil xattr->name_len = name_len; 183355da1ebSSage Weil xattr->should_free_name = should_free_name; 184355da1ebSSage Weil 185355da1ebSSage Weil ci->i_xattrs.count++; 186355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 187355da1ebSSage Weil } else { 188355da1ebSSage Weil kfree(*newxattr); 189355da1ebSSage Weil *newxattr = NULL; 190355da1ebSSage Weil if (xattr->should_free_val) 191355da1ebSSage Weil kfree((void *)xattr->val); 192355da1ebSSage Weil 193355da1ebSSage Weil if (should_free_name) { 194355da1ebSSage Weil kfree((void *)name); 195355da1ebSSage Weil name = xattr->name; 196355da1ebSSage Weil } 197355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 198355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 199355da1ebSSage Weil } 200355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 201355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 202355da1ebSSage Weil if (val) 203355da1ebSSage Weil xattr->val = val; 204355da1ebSSage Weil else 205355da1ebSSage Weil xattr->val = ""; 206355da1ebSSage Weil 207355da1ebSSage Weil xattr->val_len = val_len; 208355da1ebSSage Weil xattr->dirty = dirty; 209355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 210355da1ebSSage Weil 211355da1ebSSage Weil if (new) { 212355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 213355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 214355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 215355da1ebSSage Weil } 216355da1ebSSage Weil 217355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 218355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 219355da1ebSSage Weil 220355da1ebSSage Weil return 0; 221355da1ebSSage Weil } 222355da1ebSSage Weil 223355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 224355da1ebSSage Weil const char *name) 225355da1ebSSage Weil { 226355da1ebSSage Weil struct rb_node **p; 227355da1ebSSage Weil struct rb_node *parent = NULL; 228355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 22917db143fSSage Weil int name_len = strlen(name); 230355da1ebSSage Weil int c; 231355da1ebSSage Weil 232355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 233355da1ebSSage Weil while (*p) { 234355da1ebSSage Weil parent = *p; 235355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 236355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 23717db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 23817db143fSSage Weil c = 1; 239355da1ebSSage Weil if (c < 0) 240355da1ebSSage Weil p = &(*p)->rb_left; 241355da1ebSSage Weil else if (c > 0) 242355da1ebSSage Weil p = &(*p)->rb_right; 243355da1ebSSage Weil else { 244355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 245355da1ebSSage Weil xattr->val_len, xattr->val); 246355da1ebSSage Weil return xattr; 247355da1ebSSage Weil } 248355da1ebSSage Weil } 249355da1ebSSage Weil 250355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 251355da1ebSSage Weil 252355da1ebSSage Weil return NULL; 253355da1ebSSage Weil } 254355da1ebSSage Weil 255355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 256355da1ebSSage Weil { 257355da1ebSSage Weil BUG_ON(!xattr); 258355da1ebSSage Weil 259355da1ebSSage Weil if (xattr->should_free_name) 260355da1ebSSage Weil kfree((void *)xattr->name); 261355da1ebSSage Weil if (xattr->should_free_val) 262355da1ebSSage Weil kfree((void *)xattr->val); 263355da1ebSSage Weil 264355da1ebSSage Weil kfree(xattr); 265355da1ebSSage Weil } 266355da1ebSSage Weil 267355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 268355da1ebSSage Weil struct ceph_inode_xattr *xattr) 269355da1ebSSage Weil { 270355da1ebSSage Weil if (!xattr) 271355da1ebSSage Weil return -EOPNOTSUPP; 272355da1ebSSage Weil 273355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 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 ci->i_xattrs.names_size -= xattr->name_len; 281355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 282355da1ebSSage Weil ci->i_xattrs.count--; 283355da1ebSSage Weil kfree(xattr); 284355da1ebSSage Weil 285355da1ebSSage Weil return 0; 286355da1ebSSage Weil } 287355da1ebSSage Weil 288355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 289355da1ebSSage Weil const char *name) 290355da1ebSSage Weil { 291355da1ebSSage Weil struct rb_node **p; 292355da1ebSSage Weil struct ceph_inode_xattr *xattr; 293355da1ebSSage Weil int err; 294355da1ebSSage Weil 295355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 296355da1ebSSage Weil xattr = __get_xattr(ci, name); 297355da1ebSSage Weil err = __remove_xattr(ci, xattr); 298355da1ebSSage Weil return err; 299355da1ebSSage Weil } 300355da1ebSSage Weil 301355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 302355da1ebSSage Weil char *dest) 303355da1ebSSage Weil { 304355da1ebSSage Weil struct rb_node *p; 305355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 306355da1ebSSage Weil 307355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 308355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 309355da1ebSSage Weil 310355da1ebSSage Weil while (p) { 311355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 312355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 313355da1ebSSage Weil dest[xattr->name_len] = '\0'; 314355da1ebSSage Weil 315355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 316355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 317355da1ebSSage Weil 318355da1ebSSage Weil dest += xattr->name_len + 1; 319355da1ebSSage Weil p = rb_next(p); 320355da1ebSSage Weil } 321355da1ebSSage Weil 322355da1ebSSage Weil return dest; 323355da1ebSSage Weil } 324355da1ebSSage Weil 325355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 326355da1ebSSage Weil { 327355da1ebSSage Weil struct rb_node *p, *tmp; 328355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 329355da1ebSSage Weil 330355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 331355da1ebSSage Weil 332355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 333355da1ebSSage Weil 334355da1ebSSage Weil while (p) { 335355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 336355da1ebSSage Weil tmp = p; 337355da1ebSSage Weil p = rb_next(tmp); 338355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 339355da1ebSSage Weil xattr->name_len, xattr->name); 340355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 341355da1ebSSage Weil 342355da1ebSSage Weil __free_xattr(xattr); 343355da1ebSSage Weil } 344355da1ebSSage Weil 345355da1ebSSage Weil ci->i_xattrs.names_size = 0; 346355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 347355da1ebSSage Weil ci->i_xattrs.index_version = 0; 348355da1ebSSage Weil ci->i_xattrs.count = 0; 349355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 350355da1ebSSage Weil } 351355da1ebSSage Weil 352355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 353be655596SSage Weil __releases(ci->i_ceph_lock) 354be655596SSage Weil __acquires(ci->i_ceph_lock) 355355da1ebSSage Weil { 356355da1ebSSage Weil u32 namelen; 357355da1ebSSage Weil u32 numattr = 0; 358355da1ebSSage Weil void *p, *end; 359355da1ebSSage Weil u32 len; 360355da1ebSSage Weil const char *name, *val; 361355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 362355da1ebSSage Weil int xattr_version; 363355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 36463ff78b2SSage Weil int err = 0; 365355da1ebSSage Weil int i; 366355da1ebSSage Weil 367355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 368355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 369355da1ebSSage Weil 370355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 371355da1ebSSage Weil return 0; /* already built */ 372355da1ebSSage Weil 373355da1ebSSage Weil __ceph_destroy_xattrs(ci); 374355da1ebSSage Weil 375355da1ebSSage Weil start: 376355da1ebSSage Weil /* updated internal xattr rb tree */ 377355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 378355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 379355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 380355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 381355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 382be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 383355da1ebSSage Weil 384355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 385355da1ebSSage Weil GFP_NOFS); 386355da1ebSSage Weil err = -ENOMEM; 387355da1ebSSage Weil if (!xattrs) 388355da1ebSSage Weil goto bad_lock; 389355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 390355da1ebSSage Weil for (i = 0; i < numattr; i++) { 391355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 392355da1ebSSage Weil GFP_NOFS); 393355da1ebSSage Weil if (!xattrs[i]) 394355da1ebSSage Weil goto bad_lock; 395355da1ebSSage Weil } 396355da1ebSSage Weil 397be655596SSage Weil spin_lock(&ci->i_ceph_lock); 398355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 399355da1ebSSage Weil /* lost a race, retry */ 400355da1ebSSage Weil for (i = 0; i < numattr; i++) 401355da1ebSSage Weil kfree(xattrs[i]); 402355da1ebSSage Weil kfree(xattrs); 403355da1ebSSage Weil goto start; 404355da1ebSSage Weil } 405355da1ebSSage Weil err = -EIO; 406355da1ebSSage Weil while (numattr--) { 407355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 408355da1ebSSage Weil namelen = len; 409355da1ebSSage Weil name = p; 410355da1ebSSage Weil p += len; 411355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 412355da1ebSSage Weil val = p; 413355da1ebSSage Weil p += len; 414355da1ebSSage Weil 415355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 416355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 417355da1ebSSage Weil 418355da1ebSSage Weil if (err < 0) 419355da1ebSSage Weil goto bad; 420355da1ebSSage Weil } 421355da1ebSSage Weil kfree(xattrs); 422355da1ebSSage Weil } 423355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 424355da1ebSSage Weil ci->i_xattrs.dirty = false; 425355da1ebSSage Weil 426355da1ebSSage Weil return err; 427355da1ebSSage Weil bad_lock: 428be655596SSage Weil spin_lock(&ci->i_ceph_lock); 429355da1ebSSage Weil bad: 430355da1ebSSage Weil if (xattrs) { 431355da1ebSSage Weil for (i = 0; i < numattr; i++) 432355da1ebSSage Weil kfree(xattrs[i]); 433355da1ebSSage Weil kfree(xattrs); 434355da1ebSSage Weil } 435355da1ebSSage Weil ci->i_xattrs.names_size = 0; 436355da1ebSSage Weil return err; 437355da1ebSSage Weil } 438355da1ebSSage Weil 439355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 440355da1ebSSage Weil int val_size) 441355da1ebSSage Weil { 442355da1ebSSage Weil /* 443355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 444355da1ebSSage Weil * 4 bytes per each value 445355da1ebSSage Weil */ 446355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 447355da1ebSSage Weil ci->i_xattrs.names_size + 448355da1ebSSage Weil ci->i_xattrs.vals_size; 449355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 450355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 451355da1ebSSage Weil ci->i_xattrs.vals_size); 452355da1ebSSage Weil 453355da1ebSSage Weil if (name_size) 454355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 455355da1ebSSage Weil 456355da1ebSSage Weil return size; 457355da1ebSSage Weil } 458355da1ebSSage Weil 459355da1ebSSage Weil /* 460355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 461355da1ebSSage Weil * and swap into place. 462355da1ebSSage Weil */ 463355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 464355da1ebSSage Weil { 465355da1ebSSage Weil struct rb_node *p; 466355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 467355da1ebSSage Weil void *dest; 468355da1ebSSage Weil 469355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 470355da1ebSSage Weil if (ci->i_xattrs.dirty) { 471355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 472355da1ebSSage Weil 473355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 474355da1ebSSage Weil 475355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 476355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 477355da1ebSSage Weil 478355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 479355da1ebSSage Weil while (p) { 480355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 481355da1ebSSage Weil 482355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 483355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 484355da1ebSSage Weil dest += xattr->name_len; 485355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 486355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 487355da1ebSSage Weil dest += xattr->val_len; 488355da1ebSSage Weil 489355da1ebSSage Weil p = rb_next(p); 490355da1ebSSage Weil } 491355da1ebSSage Weil 492355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 493355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 494355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 495355da1ebSSage Weil 496b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 497355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 498355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 499355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 500355da1ebSSage Weil ci->i_xattrs.dirty = false; 5014a625be4SSage Weil ci->i_xattrs.version++; 502355da1ebSSage Weil } 503355da1ebSSage Weil } 504355da1ebSSage Weil 505355da1ebSSage Weil ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 506355da1ebSSage Weil size_t size) 507355da1ebSSage Weil { 508355da1ebSSage Weil struct inode *inode = dentry->d_inode; 509355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 510355da1ebSSage Weil int err; 511355da1ebSSage Weil struct ceph_inode_xattr *xattr; 512355da1ebSSage Weil struct ceph_vxattr_cb *vxattr = NULL; 513355da1ebSSage Weil 514355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 515355da1ebSSage Weil return -ENODATA; 516355da1ebSSage Weil 517355da1ebSSage Weil /* let's see if a virtual xattr was requested */ 518*06476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 519355da1ebSSage Weil 520be655596SSage Weil spin_lock(&ci->i_ceph_lock); 521355da1ebSSage Weil dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 522355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 523355da1ebSSage Weil 524355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 525355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 526355da1ebSSage Weil goto get_xattr; 527355da1ebSSage Weil } else { 528be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 529355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 530355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 531355da1ebSSage Weil if (err) 532355da1ebSSage Weil return err; 533355da1ebSSage Weil } 534355da1ebSSage Weil 535be655596SSage Weil spin_lock(&ci->i_ceph_lock); 536355da1ebSSage Weil 537355da1ebSSage Weil if (vxattr && vxattr->readonly) { 538355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 539355da1ebSSage Weil goto out; 540355da1ebSSage Weil } 541355da1ebSSage Weil 542355da1ebSSage Weil err = __build_xattrs(inode); 543355da1ebSSage Weil if (err < 0) 544355da1ebSSage Weil goto out; 545355da1ebSSage Weil 546355da1ebSSage Weil get_xattr: 547355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 548355da1ebSSage Weil xattr = __get_xattr(ci, name); 549355da1ebSSage Weil if (!xattr) { 550355da1ebSSage Weil if (vxattr) 551355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 552355da1ebSSage Weil goto out; 553355da1ebSSage Weil } 554355da1ebSSage Weil 555355da1ebSSage Weil err = -ERANGE; 556355da1ebSSage Weil if (size && size < xattr->val_len) 557355da1ebSSage Weil goto out; 558355da1ebSSage Weil 559355da1ebSSage Weil err = xattr->val_len; 560355da1ebSSage Weil if (size == 0) 561355da1ebSSage Weil goto out; 562355da1ebSSage Weil 563355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 564355da1ebSSage Weil 565355da1ebSSage Weil out: 566be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 567355da1ebSSage Weil return err; 568355da1ebSSage Weil } 569355da1ebSSage Weil 570355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 571355da1ebSSage Weil { 572355da1ebSSage Weil struct inode *inode = dentry->d_inode; 573355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 574355da1ebSSage Weil struct ceph_vxattr_cb *vxattrs = ceph_inode_vxattrs(inode); 575355da1ebSSage Weil u32 vir_namelen = 0; 576355da1ebSSage Weil u32 namelen; 577355da1ebSSage Weil int err; 578355da1ebSSage Weil u32 len; 579355da1ebSSage Weil int i; 580355da1ebSSage Weil 581be655596SSage Weil spin_lock(&ci->i_ceph_lock); 582355da1ebSSage Weil dout("listxattr %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) && 586bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 587355da1ebSSage Weil goto list_xattr; 588355da1ebSSage Weil } else { 589be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 590355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 591355da1ebSSage Weil if (err) 592355da1ebSSage Weil return err; 593355da1ebSSage Weil } 594355da1ebSSage Weil 595be655596SSage Weil spin_lock(&ci->i_ceph_lock); 596355da1ebSSage Weil 597355da1ebSSage Weil err = __build_xattrs(inode); 598355da1ebSSage Weil if (err < 0) 599355da1ebSSage Weil goto out; 600355da1ebSSage Weil 601355da1ebSSage Weil list_xattr: 602355da1ebSSage Weil vir_namelen = 0; 603355da1ebSSage Weil /* include virtual dir xattrs */ 604355da1ebSSage Weil if (vxattrs) 605355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) 606355da1ebSSage Weil vir_namelen += strlen(vxattrs[i].name) + 1; 607355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 608355da1ebSSage Weil namelen = vir_namelen + ci->i_xattrs.names_size + ci->i_xattrs.count; 609355da1ebSSage Weil err = -ERANGE; 610355da1ebSSage Weil if (size && namelen > size) 611355da1ebSSage Weil goto out; 612355da1ebSSage Weil 613355da1ebSSage Weil err = namelen; 614355da1ebSSage Weil if (size == 0) 615355da1ebSSage Weil goto out; 616355da1ebSSage Weil 617355da1ebSSage Weil names = __copy_xattr_names(ci, names); 618355da1ebSSage Weil 619355da1ebSSage Weil /* virtual xattr names, too */ 620355da1ebSSage Weil if (vxattrs) 621355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 622355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 623355da1ebSSage Weil names += len + 1; 624355da1ebSSage Weil } 625355da1ebSSage Weil 626355da1ebSSage Weil out: 627be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 628355da1ebSSage Weil return err; 629355da1ebSSage Weil } 630355da1ebSSage Weil 631355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 632355da1ebSSage Weil const char *value, size_t size, int flags) 633355da1ebSSage Weil { 6343d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 635355da1ebSSage Weil struct inode *inode = dentry->d_inode; 636355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 6375f21c96dSSage Weil struct inode *parent_inode; 638355da1ebSSage Weil struct ceph_mds_request *req; 6393d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 640355da1ebSSage Weil int err; 641355da1ebSSage Weil int i, nr_pages; 642355da1ebSSage Weil struct page **pages = NULL; 643355da1ebSSage Weil void *kaddr; 644355da1ebSSage Weil 645355da1ebSSage Weil /* copy value into some pages */ 646355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 647355da1ebSSage Weil if (nr_pages) { 648355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 649355da1ebSSage Weil if (!pages) 650355da1ebSSage Weil return -ENOMEM; 651355da1ebSSage Weil err = -ENOMEM; 652355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 65331459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 654355da1ebSSage Weil if (!pages[i]) { 655355da1ebSSage Weil nr_pages = i; 656355da1ebSSage Weil goto out; 657355da1ebSSage Weil } 658355da1ebSSage Weil kaddr = kmap(pages[i]); 659355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 660355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 661355da1ebSSage Weil } 662355da1ebSSage Weil } 663355da1ebSSage Weil 664355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 665355da1ebSSage Weil 666355da1ebSSage Weil /* do request */ 667355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 668355da1ebSSage Weil USE_AUTH_MDS); 66960d87733SJulia Lawall if (IS_ERR(req)) { 67060d87733SJulia Lawall err = PTR_ERR(req); 67160d87733SJulia Lawall goto out; 67260d87733SJulia Lawall } 67370b666c3SSage Weil req->r_inode = inode; 67470b666c3SSage Weil ihold(inode); 675355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 676355da1ebSSage Weil req->r_num_caps = 1; 677355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 678355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 679355da1ebSSage Weil 680355da1ebSSage Weil req->r_pages = pages; 681355da1ebSSage Weil req->r_num_pages = nr_pages; 682355da1ebSSage Weil req->r_data_len = size; 683355da1ebSSage Weil 684355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 6855f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 686355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 6875f21c96dSSage Weil iput(parent_inode); 688355da1ebSSage Weil ceph_mdsc_put_request(req); 689355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 690355da1ebSSage Weil 691355da1ebSSage Weil out: 692355da1ebSSage Weil if (pages) { 693355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 694355da1ebSSage Weil __free_page(pages[i]); 695355da1ebSSage Weil kfree(pages); 696355da1ebSSage Weil } 697355da1ebSSage Weil return err; 698355da1ebSSage Weil } 699355da1ebSSage Weil 700355da1ebSSage Weil int ceph_setxattr(struct dentry *dentry, const char *name, 701355da1ebSSage Weil const void *value, size_t size, int flags) 702355da1ebSSage Weil { 703355da1ebSSage Weil struct inode *inode = dentry->d_inode; 704*06476a69SAlex Elder struct ceph_vxattr_cb *vxattr; 705355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 706355da1ebSSage Weil int err; 707355da1ebSSage Weil int name_len = strlen(name); 708355da1ebSSage Weil int val_len = size; 709355da1ebSSage Weil char *newname = NULL; 710355da1ebSSage Weil char *newval = NULL; 711355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 712355da1ebSSage Weil int issued; 713355da1ebSSage Weil int required_blob_size; 714fca65b4aSSage Weil int dirty; 715355da1ebSSage Weil 716355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 717355da1ebSSage Weil return -EROFS; 718355da1ebSSage Weil 719355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 720355da1ebSSage Weil return -EOPNOTSUPP; 721355da1ebSSage Weil 722*06476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 723355da1ebSSage Weil if (vxattr && vxattr->readonly) 724355da1ebSSage Weil return -EOPNOTSUPP; 725355da1ebSSage Weil 726355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 727355da1ebSSage Weil err = -ENOMEM; 72861413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 729355da1ebSSage Weil if (!newname) 730355da1ebSSage Weil goto out; 731355da1ebSSage Weil 732355da1ebSSage Weil if (val_len) { 733b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 734355da1ebSSage Weil if (!newval) 735355da1ebSSage Weil goto out; 736355da1ebSSage Weil } 737355da1ebSSage Weil 738355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 739355da1ebSSage Weil if (!xattr) 740355da1ebSSage Weil goto out; 741355da1ebSSage Weil 742be655596SSage Weil spin_lock(&ci->i_ceph_lock); 743355da1ebSSage Weil retry: 744355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 745355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 746355da1ebSSage Weil goto do_sync; 747355da1ebSSage Weil __build_xattrs(inode); 748355da1ebSSage Weil 749355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 750355da1ebSSage Weil 751355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 752355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 753355da1ebSSage Weil struct ceph_buffer *blob = NULL; 754355da1ebSSage Weil 755be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 756355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 757b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 758355da1ebSSage Weil if (!blob) 759355da1ebSSage Weil goto out; 760be655596SSage Weil spin_lock(&ci->i_ceph_lock); 761b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 762355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 763355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 764355da1ebSSage Weil goto retry; 765355da1ebSSage Weil } 766355da1ebSSage Weil 767355da1ebSSage Weil dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 768355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 769355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 770fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 771355da1ebSSage Weil ci->i_xattrs.dirty = true; 772355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 773be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 774fca65b4aSSage Weil if (dirty) 775fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 776355da1ebSSage Weil return err; 777355da1ebSSage Weil 778355da1ebSSage Weil do_sync: 779be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 780355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 781355da1ebSSage Weil out: 782355da1ebSSage Weil kfree(newname); 783355da1ebSSage Weil kfree(newval); 784355da1ebSSage Weil kfree(xattr); 785355da1ebSSage Weil return err; 786355da1ebSSage Weil } 787355da1ebSSage Weil 788355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 789355da1ebSSage Weil { 7903d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 7913d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 792355da1ebSSage Weil struct inode *inode = dentry->d_inode; 7935f21c96dSSage Weil struct inode *parent_inode; 794355da1ebSSage Weil struct ceph_mds_request *req; 795355da1ebSSage Weil int err; 796355da1ebSSage Weil 797355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 798355da1ebSSage Weil USE_AUTH_MDS); 799355da1ebSSage Weil if (IS_ERR(req)) 800355da1ebSSage Weil return PTR_ERR(req); 80170b666c3SSage Weil req->r_inode = inode; 80270b666c3SSage Weil ihold(inode); 803355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 804355da1ebSSage Weil req->r_num_caps = 1; 805355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 806355da1ebSSage Weil 8075f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 808355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 8095f21c96dSSage Weil iput(parent_inode); 810355da1ebSSage Weil ceph_mdsc_put_request(req); 811355da1ebSSage Weil return err; 812355da1ebSSage Weil } 813355da1ebSSage Weil 814355da1ebSSage Weil int ceph_removexattr(struct dentry *dentry, const char *name) 815355da1ebSSage Weil { 816355da1ebSSage Weil struct inode *inode = dentry->d_inode; 817*06476a69SAlex Elder struct ceph_vxattr_cb *vxattr; 818355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 819355da1ebSSage Weil int issued; 820355da1ebSSage Weil int err; 82183eb26afSAlex Elder int required_blob_size; 822fca65b4aSSage Weil int dirty; 823355da1ebSSage Weil 824355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 825355da1ebSSage Weil return -EROFS; 826355da1ebSSage Weil 827355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 828355da1ebSSage Weil return -EOPNOTSUPP; 829355da1ebSSage Weil 830*06476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 831355da1ebSSage Weil if (vxattr && vxattr->readonly) 832355da1ebSSage Weil return -EOPNOTSUPP; 833355da1ebSSage Weil 83483eb26afSAlex Elder err = -ENOMEM; 835be655596SSage Weil spin_lock(&ci->i_ceph_lock); 836355da1ebSSage Weil __build_xattrs(inode); 83783eb26afSAlex Elder retry: 838355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 839355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 840355da1ebSSage Weil 841355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 842355da1ebSSage Weil goto do_sync; 843355da1ebSSage Weil 84483eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 84583eb26afSAlex Elder 84683eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 84783eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 84883eb26afSAlex Elder struct ceph_buffer *blob; 84983eb26afSAlex Elder 85083eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 85183eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 85283eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 85383eb26afSAlex Elder if (!blob) 85483eb26afSAlex Elder goto out; 85583eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 85683eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 85783eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 85883eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 85983eb26afSAlex Elder goto retry; 86083eb26afSAlex Elder } 86183eb26afSAlex Elder 862355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 863fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 864355da1ebSSage Weil ci->i_xattrs.dirty = true; 865355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 866355da1ebSSage Weil 867be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 868fca65b4aSSage Weil if (dirty) 869fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 870355da1ebSSage Weil return err; 871355da1ebSSage Weil do_sync: 872be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 873355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 87483eb26afSAlex Elder out: 875355da1ebSSage Weil return err; 876355da1ebSSage Weil } 877355da1ebSSage Weil 878