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 11*22891907SAlex Elder #define XATTR_CEPH_PREFIX "ceph." 12*22891907SAlex Elder #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) 13*22891907SAlex Elder 14355da1ebSSage Weil static bool ceph_is_valid_xattr(const char *name) 15355da1ebSSage Weil { 16*22891907SAlex 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 */ 27355da1ebSSage Weil struct ceph_vxattr_cb { 28355da1ebSSage Weil bool readonly; 29355da1ebSSage Weil char *name; 30355da1ebSSage Weil size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, 31355da1ebSSage Weil size_t size); 32355da1ebSSage Weil }; 33355da1ebSSage Weil 34355da1ebSSage Weil /* directories */ 35355da1ebSSage Weil 36355da1ebSSage Weil static size_t ceph_vxattrcb_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 42355da1ebSSage Weil static size_t ceph_vxattrcb_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 48355da1ebSSage Weil static size_t ceph_vxattrcb_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 54355da1ebSSage Weil static size_t ceph_vxattrcb_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 60355da1ebSSage Weil static size_t ceph_vxattrcb_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 66355da1ebSSage Weil static size_t ceph_vxattrcb_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 72355da1ebSSage Weil static size_t ceph_vxattrcb_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 78355da1ebSSage Weil static size_t ceph_vxattrcb_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 85355da1ebSSage Weil static struct ceph_vxattr_cb ceph_dir_vxattrs[] = { 86*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "dir.entries", ceph_vxattrcb_entries}, 87*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "dir.files", ceph_vxattrcb_files}, 88*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "dir.subdirs", ceph_vxattrcb_subdirs}, 89*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "dir.rentries", ceph_vxattrcb_rentries}, 90*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "dir.rfiles", ceph_vxattrcb_rfiles}, 91*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "dir.rsubdirs", ceph_vxattrcb_rsubdirs}, 92*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "dir.rbytes", ceph_vxattrcb_rbytes}, 93*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "dir.rctime", ceph_vxattrcb_rctime}, 94355da1ebSSage Weil { true, NULL, NULL } 95355da1ebSSage Weil }; 96355da1ebSSage Weil 97355da1ebSSage Weil /* files */ 98355da1ebSSage Weil 99355da1ebSSage Weil static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, 100355da1ebSSage Weil size_t size) 101355da1ebSSage Weil { 102b195befdSSage Weil int ret; 103b195befdSSage Weil 104b195befdSSage Weil ret = snprintf(val, size, 105355da1ebSSage Weil "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n", 106355da1ebSSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 107355da1ebSSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 108355da1ebSSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); 109b195befdSSage Weil if (ceph_file_layout_pg_preferred(ci->i_layout)) 110b195befdSSage Weil ret += snprintf(val + ret, size, "preferred_osd=%lld\n", 111b195befdSSage Weil (unsigned long long)ceph_file_layout_pg_preferred( 112b195befdSSage Weil ci->i_layout)); 113b195befdSSage Weil return ret; 114355da1ebSSage Weil } 115355da1ebSSage Weil 116355da1ebSSage Weil static struct ceph_vxattr_cb ceph_file_vxattrs[] = { 117*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "file.layout", ceph_vxattrcb_layout}, 118114fc474SAlex Elder /* The following extended attribute name is deprecated */ 119*22891907SAlex Elder { true, XATTR_CEPH_PREFIX "layout", ceph_vxattrcb_layout}, 120114fc474SAlex Elder { true, NULL, NULL } 121355da1ebSSage Weil }; 122355da1ebSSage Weil 123355da1ebSSage Weil static struct ceph_vxattr_cb *ceph_inode_vxattrs(struct inode *inode) 124355da1ebSSage Weil { 125355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 126355da1ebSSage Weil return ceph_dir_vxattrs; 127355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 128355da1ebSSage Weil return ceph_file_vxattrs; 129355da1ebSSage Weil return NULL; 130355da1ebSSage Weil } 131355da1ebSSage Weil 13206476a69SAlex Elder static struct ceph_vxattr_cb *ceph_match_vxattr(struct inode *inode, 133355da1ebSSage Weil const char *name) 134355da1ebSSage Weil { 13506476a69SAlex Elder struct ceph_vxattr_cb *vxattr = ceph_inode_vxattrs(inode); 13606476a69SAlex Elder 13706476a69SAlex Elder if (vxattr) { 13806476a69SAlex Elder while (vxattr->name) { 13906476a69SAlex Elder if (!strcmp(vxattr->name, name)) 140355da1ebSSage Weil return vxattr; 141355da1ebSSage Weil vxattr++; 14206476a69SAlex Elder } 14306476a69SAlex Elder } 14406476a69SAlex Elder 145355da1ebSSage Weil return NULL; 146355da1ebSSage Weil } 147355da1ebSSage Weil 148355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 149355da1ebSSage Weil const char *name, int name_len, 150355da1ebSSage Weil const char *val, int val_len, 151355da1ebSSage Weil int dirty, 152355da1ebSSage Weil int should_free_name, int should_free_val, 153355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 154355da1ebSSage Weil { 155355da1ebSSage Weil struct rb_node **p; 156355da1ebSSage Weil struct rb_node *parent = NULL; 157355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 158355da1ebSSage Weil int c; 159355da1ebSSage Weil int new = 0; 160355da1ebSSage Weil 161355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 162355da1ebSSage Weil while (*p) { 163355da1ebSSage Weil parent = *p; 164355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 165355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 166355da1ebSSage Weil if (c < 0) 167355da1ebSSage Weil p = &(*p)->rb_left; 168355da1ebSSage Weil else if (c > 0) 169355da1ebSSage Weil p = &(*p)->rb_right; 170355da1ebSSage Weil else { 171355da1ebSSage Weil if (name_len == xattr->name_len) 172355da1ebSSage Weil break; 173355da1ebSSage Weil else if (name_len < xattr->name_len) 174355da1ebSSage Weil p = &(*p)->rb_left; 175355da1ebSSage Weil else 176355da1ebSSage Weil p = &(*p)->rb_right; 177355da1ebSSage Weil } 178355da1ebSSage Weil xattr = NULL; 179355da1ebSSage Weil } 180355da1ebSSage Weil 181355da1ebSSage Weil if (!xattr) { 182355da1ebSSage Weil new = 1; 183355da1ebSSage Weil xattr = *newxattr; 184355da1ebSSage Weil xattr->name = name; 185355da1ebSSage Weil xattr->name_len = name_len; 186355da1ebSSage Weil xattr->should_free_name = should_free_name; 187355da1ebSSage Weil 188355da1ebSSage Weil ci->i_xattrs.count++; 189355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 190355da1ebSSage Weil } else { 191355da1ebSSage Weil kfree(*newxattr); 192355da1ebSSage Weil *newxattr = NULL; 193355da1ebSSage Weil if (xattr->should_free_val) 194355da1ebSSage Weil kfree((void *)xattr->val); 195355da1ebSSage Weil 196355da1ebSSage Weil if (should_free_name) { 197355da1ebSSage Weil kfree((void *)name); 198355da1ebSSage Weil name = xattr->name; 199355da1ebSSage Weil } 200355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 201355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 202355da1ebSSage Weil } 203355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 204355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 205355da1ebSSage Weil if (val) 206355da1ebSSage Weil xattr->val = val; 207355da1ebSSage Weil else 208355da1ebSSage Weil xattr->val = ""; 209355da1ebSSage Weil 210355da1ebSSage Weil xattr->val_len = val_len; 211355da1ebSSage Weil xattr->dirty = dirty; 212355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 213355da1ebSSage Weil 214355da1ebSSage Weil if (new) { 215355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 216355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 217355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 218355da1ebSSage Weil } 219355da1ebSSage Weil 220355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 221355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 222355da1ebSSage Weil 223355da1ebSSage Weil return 0; 224355da1ebSSage Weil } 225355da1ebSSage Weil 226355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 227355da1ebSSage Weil const char *name) 228355da1ebSSage Weil { 229355da1ebSSage Weil struct rb_node **p; 230355da1ebSSage Weil struct rb_node *parent = NULL; 231355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 23217db143fSSage Weil int name_len = strlen(name); 233355da1ebSSage Weil int c; 234355da1ebSSage Weil 235355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 236355da1ebSSage Weil while (*p) { 237355da1ebSSage Weil parent = *p; 238355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 239355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 24017db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 24117db143fSSage Weil c = 1; 242355da1ebSSage Weil if (c < 0) 243355da1ebSSage Weil p = &(*p)->rb_left; 244355da1ebSSage Weil else if (c > 0) 245355da1ebSSage Weil p = &(*p)->rb_right; 246355da1ebSSage Weil else { 247355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 248355da1ebSSage Weil xattr->val_len, xattr->val); 249355da1ebSSage Weil return xattr; 250355da1ebSSage Weil } 251355da1ebSSage Weil } 252355da1ebSSage Weil 253355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 254355da1ebSSage Weil 255355da1ebSSage Weil return NULL; 256355da1ebSSage Weil } 257355da1ebSSage Weil 258355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 259355da1ebSSage Weil { 260355da1ebSSage Weil BUG_ON(!xattr); 261355da1ebSSage Weil 262355da1ebSSage Weil if (xattr->should_free_name) 263355da1ebSSage Weil kfree((void *)xattr->name); 264355da1ebSSage Weil if (xattr->should_free_val) 265355da1ebSSage Weil kfree((void *)xattr->val); 266355da1ebSSage Weil 267355da1ebSSage Weil kfree(xattr); 268355da1ebSSage Weil } 269355da1ebSSage Weil 270355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 271355da1ebSSage Weil struct ceph_inode_xattr *xattr) 272355da1ebSSage Weil { 273355da1ebSSage Weil if (!xattr) 274355da1ebSSage Weil return -EOPNOTSUPP; 275355da1ebSSage Weil 276355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 277355da1ebSSage Weil 278355da1ebSSage Weil if (xattr->should_free_name) 279355da1ebSSage Weil kfree((void *)xattr->name); 280355da1ebSSage Weil if (xattr->should_free_val) 281355da1ebSSage Weil kfree((void *)xattr->val); 282355da1ebSSage Weil 283355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 284355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 285355da1ebSSage Weil ci->i_xattrs.count--; 286355da1ebSSage Weil kfree(xattr); 287355da1ebSSage Weil 288355da1ebSSage Weil return 0; 289355da1ebSSage Weil } 290355da1ebSSage Weil 291355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 292355da1ebSSage Weil const char *name) 293355da1ebSSage Weil { 294355da1ebSSage Weil struct rb_node **p; 295355da1ebSSage Weil struct ceph_inode_xattr *xattr; 296355da1ebSSage Weil int err; 297355da1ebSSage Weil 298355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 299355da1ebSSage Weil xattr = __get_xattr(ci, name); 300355da1ebSSage Weil err = __remove_xattr(ci, xattr); 301355da1ebSSage Weil return err; 302355da1ebSSage Weil } 303355da1ebSSage Weil 304355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 305355da1ebSSage Weil char *dest) 306355da1ebSSage Weil { 307355da1ebSSage Weil struct rb_node *p; 308355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 309355da1ebSSage Weil 310355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 311355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 312355da1ebSSage Weil 313355da1ebSSage Weil while (p) { 314355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 315355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 316355da1ebSSage Weil dest[xattr->name_len] = '\0'; 317355da1ebSSage Weil 318355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 319355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 320355da1ebSSage Weil 321355da1ebSSage Weil dest += xattr->name_len + 1; 322355da1ebSSage Weil p = rb_next(p); 323355da1ebSSage Weil } 324355da1ebSSage Weil 325355da1ebSSage Weil return dest; 326355da1ebSSage Weil } 327355da1ebSSage Weil 328355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 329355da1ebSSage Weil { 330355da1ebSSage Weil struct rb_node *p, *tmp; 331355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 332355da1ebSSage Weil 333355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 334355da1ebSSage Weil 335355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 336355da1ebSSage Weil 337355da1ebSSage Weil while (p) { 338355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 339355da1ebSSage Weil tmp = p; 340355da1ebSSage Weil p = rb_next(tmp); 341355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 342355da1ebSSage Weil xattr->name_len, xattr->name); 343355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 344355da1ebSSage Weil 345355da1ebSSage Weil __free_xattr(xattr); 346355da1ebSSage Weil } 347355da1ebSSage Weil 348355da1ebSSage Weil ci->i_xattrs.names_size = 0; 349355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 350355da1ebSSage Weil ci->i_xattrs.index_version = 0; 351355da1ebSSage Weil ci->i_xattrs.count = 0; 352355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 353355da1ebSSage Weil } 354355da1ebSSage Weil 355355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 356be655596SSage Weil __releases(ci->i_ceph_lock) 357be655596SSage Weil __acquires(ci->i_ceph_lock) 358355da1ebSSage Weil { 359355da1ebSSage Weil u32 namelen; 360355da1ebSSage Weil u32 numattr = 0; 361355da1ebSSage Weil void *p, *end; 362355da1ebSSage Weil u32 len; 363355da1ebSSage Weil const char *name, *val; 364355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 365355da1ebSSage Weil int xattr_version; 366355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 36763ff78b2SSage Weil int err = 0; 368355da1ebSSage Weil int i; 369355da1ebSSage Weil 370355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 371355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 372355da1ebSSage Weil 373355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 374355da1ebSSage Weil return 0; /* already built */ 375355da1ebSSage Weil 376355da1ebSSage Weil __ceph_destroy_xattrs(ci); 377355da1ebSSage Weil 378355da1ebSSage Weil start: 379355da1ebSSage Weil /* updated internal xattr rb tree */ 380355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 381355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 382355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 383355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 384355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 385be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 386355da1ebSSage Weil 387355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 388355da1ebSSage Weil GFP_NOFS); 389355da1ebSSage Weil err = -ENOMEM; 390355da1ebSSage Weil if (!xattrs) 391355da1ebSSage Weil goto bad_lock; 392355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 393355da1ebSSage Weil for (i = 0; i < numattr; i++) { 394355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 395355da1ebSSage Weil GFP_NOFS); 396355da1ebSSage Weil if (!xattrs[i]) 397355da1ebSSage Weil goto bad_lock; 398355da1ebSSage Weil } 399355da1ebSSage Weil 400be655596SSage Weil spin_lock(&ci->i_ceph_lock); 401355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 402355da1ebSSage Weil /* lost a race, retry */ 403355da1ebSSage Weil for (i = 0; i < numattr; i++) 404355da1ebSSage Weil kfree(xattrs[i]); 405355da1ebSSage Weil kfree(xattrs); 406355da1ebSSage Weil goto start; 407355da1ebSSage Weil } 408355da1ebSSage Weil err = -EIO; 409355da1ebSSage Weil while (numattr--) { 410355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 411355da1ebSSage Weil namelen = len; 412355da1ebSSage Weil name = p; 413355da1ebSSage Weil p += len; 414355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 415355da1ebSSage Weil val = p; 416355da1ebSSage Weil p += len; 417355da1ebSSage Weil 418355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 419355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 420355da1ebSSage Weil 421355da1ebSSage Weil if (err < 0) 422355da1ebSSage Weil goto bad; 423355da1ebSSage Weil } 424355da1ebSSage Weil kfree(xattrs); 425355da1ebSSage Weil } 426355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 427355da1ebSSage Weil ci->i_xattrs.dirty = false; 428355da1ebSSage Weil 429355da1ebSSage Weil return err; 430355da1ebSSage Weil bad_lock: 431be655596SSage Weil spin_lock(&ci->i_ceph_lock); 432355da1ebSSage Weil bad: 433355da1ebSSage Weil if (xattrs) { 434355da1ebSSage Weil for (i = 0; i < numattr; i++) 435355da1ebSSage Weil kfree(xattrs[i]); 436355da1ebSSage Weil kfree(xattrs); 437355da1ebSSage Weil } 438355da1ebSSage Weil ci->i_xattrs.names_size = 0; 439355da1ebSSage Weil return err; 440355da1ebSSage Weil } 441355da1ebSSage Weil 442355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 443355da1ebSSage Weil int val_size) 444355da1ebSSage Weil { 445355da1ebSSage Weil /* 446355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 447355da1ebSSage Weil * 4 bytes per each value 448355da1ebSSage Weil */ 449355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 450355da1ebSSage Weil ci->i_xattrs.names_size + 451355da1ebSSage Weil ci->i_xattrs.vals_size; 452355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 453355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 454355da1ebSSage Weil ci->i_xattrs.vals_size); 455355da1ebSSage Weil 456355da1ebSSage Weil if (name_size) 457355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 458355da1ebSSage Weil 459355da1ebSSage Weil return size; 460355da1ebSSage Weil } 461355da1ebSSage Weil 462355da1ebSSage Weil /* 463355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 464355da1ebSSage Weil * and swap into place. 465355da1ebSSage Weil */ 466355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 467355da1ebSSage Weil { 468355da1ebSSage Weil struct rb_node *p; 469355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 470355da1ebSSage Weil void *dest; 471355da1ebSSage Weil 472355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 473355da1ebSSage Weil if (ci->i_xattrs.dirty) { 474355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 475355da1ebSSage Weil 476355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 477355da1ebSSage Weil 478355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 479355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 480355da1ebSSage Weil 481355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 482355da1ebSSage Weil while (p) { 483355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 484355da1ebSSage Weil 485355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 486355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 487355da1ebSSage Weil dest += xattr->name_len; 488355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 489355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 490355da1ebSSage Weil dest += xattr->val_len; 491355da1ebSSage Weil 492355da1ebSSage Weil p = rb_next(p); 493355da1ebSSage Weil } 494355da1ebSSage Weil 495355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 496355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 497355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 498355da1ebSSage Weil 499b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 500355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 501355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 502355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 503355da1ebSSage Weil ci->i_xattrs.dirty = false; 5044a625be4SSage Weil ci->i_xattrs.version++; 505355da1ebSSage Weil } 506355da1ebSSage Weil } 507355da1ebSSage Weil 508355da1ebSSage Weil ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 509355da1ebSSage Weil size_t size) 510355da1ebSSage Weil { 511355da1ebSSage Weil struct inode *inode = dentry->d_inode; 512355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 513355da1ebSSage Weil int err; 514355da1ebSSage Weil struct ceph_inode_xattr *xattr; 515355da1ebSSage Weil struct ceph_vxattr_cb *vxattr = NULL; 516355da1ebSSage Weil 517355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 518355da1ebSSage Weil return -ENODATA; 519355da1ebSSage Weil 520355da1ebSSage Weil /* let's see if a virtual xattr was requested */ 52106476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 522355da1ebSSage Weil 523be655596SSage Weil spin_lock(&ci->i_ceph_lock); 524355da1ebSSage Weil dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 525355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 526355da1ebSSage Weil 527355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 528355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 529355da1ebSSage Weil goto get_xattr; 530355da1ebSSage Weil } else { 531be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 532355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 533355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 534355da1ebSSage Weil if (err) 535355da1ebSSage Weil return err; 536355da1ebSSage Weil } 537355da1ebSSage Weil 538be655596SSage Weil spin_lock(&ci->i_ceph_lock); 539355da1ebSSage Weil 540355da1ebSSage Weil if (vxattr && vxattr->readonly) { 541355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 542355da1ebSSage Weil goto out; 543355da1ebSSage Weil } 544355da1ebSSage Weil 545355da1ebSSage Weil err = __build_xattrs(inode); 546355da1ebSSage Weil if (err < 0) 547355da1ebSSage Weil goto out; 548355da1ebSSage Weil 549355da1ebSSage Weil get_xattr: 550355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 551355da1ebSSage Weil xattr = __get_xattr(ci, name); 552355da1ebSSage Weil if (!xattr) { 553355da1ebSSage Weil if (vxattr) 554355da1ebSSage Weil err = vxattr->getxattr_cb(ci, value, size); 555355da1ebSSage Weil goto out; 556355da1ebSSage Weil } 557355da1ebSSage Weil 558355da1ebSSage Weil err = -ERANGE; 559355da1ebSSage Weil if (size && size < xattr->val_len) 560355da1ebSSage Weil goto out; 561355da1ebSSage Weil 562355da1ebSSage Weil err = xattr->val_len; 563355da1ebSSage Weil if (size == 0) 564355da1ebSSage Weil goto out; 565355da1ebSSage Weil 566355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 567355da1ebSSage Weil 568355da1ebSSage Weil out: 569be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 570355da1ebSSage Weil return err; 571355da1ebSSage Weil } 572355da1ebSSage Weil 573355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 574355da1ebSSage Weil { 575355da1ebSSage Weil struct inode *inode = dentry->d_inode; 576355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 577355da1ebSSage Weil struct ceph_vxattr_cb *vxattrs = ceph_inode_vxattrs(inode); 578355da1ebSSage Weil u32 vir_namelen = 0; 579355da1ebSSage Weil u32 namelen; 580355da1ebSSage Weil int err; 581355da1ebSSage Weil u32 len; 582355da1ebSSage Weil int i; 583355da1ebSSage Weil 584be655596SSage Weil spin_lock(&ci->i_ceph_lock); 585355da1ebSSage Weil dout("listxattr %p ver=%lld index_ver=%lld\n", inode, 586355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 587355da1ebSSage Weil 588355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 589bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 590355da1ebSSage Weil goto list_xattr; 591355da1ebSSage Weil } else { 592be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 593355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 594355da1ebSSage Weil if (err) 595355da1ebSSage Weil return err; 596355da1ebSSage Weil } 597355da1ebSSage Weil 598be655596SSage Weil spin_lock(&ci->i_ceph_lock); 599355da1ebSSage Weil 600355da1ebSSage Weil err = __build_xattrs(inode); 601355da1ebSSage Weil if (err < 0) 602355da1ebSSage Weil goto out; 603355da1ebSSage Weil 604355da1ebSSage Weil list_xattr: 605355da1ebSSage Weil vir_namelen = 0; 606355da1ebSSage Weil /* include virtual dir xattrs */ 607355da1ebSSage Weil if (vxattrs) 608355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) 609355da1ebSSage Weil vir_namelen += strlen(vxattrs[i].name) + 1; 610355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 611355da1ebSSage Weil namelen = vir_namelen + ci->i_xattrs.names_size + ci->i_xattrs.count; 612355da1ebSSage Weil err = -ERANGE; 613355da1ebSSage Weil if (size && namelen > size) 614355da1ebSSage Weil goto out; 615355da1ebSSage Weil 616355da1ebSSage Weil err = namelen; 617355da1ebSSage Weil if (size == 0) 618355da1ebSSage Weil goto out; 619355da1ebSSage Weil 620355da1ebSSage Weil names = __copy_xattr_names(ci, names); 621355da1ebSSage Weil 622355da1ebSSage Weil /* virtual xattr names, too */ 623355da1ebSSage Weil if (vxattrs) 624355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 625355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 626355da1ebSSage Weil names += len + 1; 627355da1ebSSage Weil } 628355da1ebSSage Weil 629355da1ebSSage Weil out: 630be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 631355da1ebSSage Weil return err; 632355da1ebSSage Weil } 633355da1ebSSage Weil 634355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 635355da1ebSSage Weil const char *value, size_t size, int flags) 636355da1ebSSage Weil { 6373d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 638355da1ebSSage Weil struct inode *inode = dentry->d_inode; 639355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 6405f21c96dSSage Weil struct inode *parent_inode; 641355da1ebSSage Weil struct ceph_mds_request *req; 6423d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 643355da1ebSSage Weil int err; 644355da1ebSSage Weil int i, nr_pages; 645355da1ebSSage Weil struct page **pages = NULL; 646355da1ebSSage Weil void *kaddr; 647355da1ebSSage Weil 648355da1ebSSage Weil /* copy value into some pages */ 649355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 650355da1ebSSage Weil if (nr_pages) { 651355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 652355da1ebSSage Weil if (!pages) 653355da1ebSSage Weil return -ENOMEM; 654355da1ebSSage Weil err = -ENOMEM; 655355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 65631459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 657355da1ebSSage Weil if (!pages[i]) { 658355da1ebSSage Weil nr_pages = i; 659355da1ebSSage Weil goto out; 660355da1ebSSage Weil } 661355da1ebSSage Weil kaddr = kmap(pages[i]); 662355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 663355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 664355da1ebSSage Weil } 665355da1ebSSage Weil } 666355da1ebSSage Weil 667355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 668355da1ebSSage Weil 669355da1ebSSage Weil /* do request */ 670355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 671355da1ebSSage Weil USE_AUTH_MDS); 67260d87733SJulia Lawall if (IS_ERR(req)) { 67360d87733SJulia Lawall err = PTR_ERR(req); 67460d87733SJulia Lawall goto out; 67560d87733SJulia Lawall } 67670b666c3SSage Weil req->r_inode = inode; 67770b666c3SSage Weil ihold(inode); 678355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 679355da1ebSSage Weil req->r_num_caps = 1; 680355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 681355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 682355da1ebSSage Weil 683355da1ebSSage Weil req->r_pages = pages; 684355da1ebSSage Weil req->r_num_pages = nr_pages; 685355da1ebSSage Weil req->r_data_len = size; 686355da1ebSSage Weil 687355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 6885f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 689355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 6905f21c96dSSage Weil iput(parent_inode); 691355da1ebSSage Weil ceph_mdsc_put_request(req); 692355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 693355da1ebSSage Weil 694355da1ebSSage Weil out: 695355da1ebSSage Weil if (pages) { 696355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 697355da1ebSSage Weil __free_page(pages[i]); 698355da1ebSSage Weil kfree(pages); 699355da1ebSSage Weil } 700355da1ebSSage Weil return err; 701355da1ebSSage Weil } 702355da1ebSSage Weil 703355da1ebSSage Weil int ceph_setxattr(struct dentry *dentry, const char *name, 704355da1ebSSage Weil const void *value, size_t size, int flags) 705355da1ebSSage Weil { 706355da1ebSSage Weil struct inode *inode = dentry->d_inode; 70706476a69SAlex Elder struct ceph_vxattr_cb *vxattr; 708355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 709355da1ebSSage Weil int err; 710355da1ebSSage Weil int name_len = strlen(name); 711355da1ebSSage Weil int val_len = size; 712355da1ebSSage Weil char *newname = NULL; 713355da1ebSSage Weil char *newval = NULL; 714355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 715355da1ebSSage Weil int issued; 716355da1ebSSage Weil int required_blob_size; 717fca65b4aSSage Weil int dirty; 718355da1ebSSage Weil 719355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 720355da1ebSSage Weil return -EROFS; 721355da1ebSSage Weil 722355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 723355da1ebSSage Weil return -EOPNOTSUPP; 724355da1ebSSage Weil 72506476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 726355da1ebSSage Weil if (vxattr && vxattr->readonly) 727355da1ebSSage Weil return -EOPNOTSUPP; 728355da1ebSSage Weil 729355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 730355da1ebSSage Weil err = -ENOMEM; 73161413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 732355da1ebSSage Weil if (!newname) 733355da1ebSSage Weil goto out; 734355da1ebSSage Weil 735355da1ebSSage Weil if (val_len) { 736b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 737355da1ebSSage Weil if (!newval) 738355da1ebSSage Weil goto out; 739355da1ebSSage Weil } 740355da1ebSSage Weil 741355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 742355da1ebSSage Weil if (!xattr) 743355da1ebSSage Weil goto out; 744355da1ebSSage Weil 745be655596SSage Weil spin_lock(&ci->i_ceph_lock); 746355da1ebSSage Weil retry: 747355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 748355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 749355da1ebSSage Weil goto do_sync; 750355da1ebSSage Weil __build_xattrs(inode); 751355da1ebSSage Weil 752355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 753355da1ebSSage Weil 754355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 755355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 756355da1ebSSage Weil struct ceph_buffer *blob = NULL; 757355da1ebSSage Weil 758be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 759355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 760b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 761355da1ebSSage Weil if (!blob) 762355da1ebSSage Weil goto out; 763be655596SSage Weil spin_lock(&ci->i_ceph_lock); 764b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 765355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 766355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 767355da1ebSSage Weil goto retry; 768355da1ebSSage Weil } 769355da1ebSSage Weil 770355da1ebSSage Weil dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 771355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 772355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 773fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 774355da1ebSSage Weil ci->i_xattrs.dirty = true; 775355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 776be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 777fca65b4aSSage Weil if (dirty) 778fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 779355da1ebSSage Weil return err; 780355da1ebSSage Weil 781355da1ebSSage Weil do_sync: 782be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 783355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 784355da1ebSSage Weil out: 785355da1ebSSage Weil kfree(newname); 786355da1ebSSage Weil kfree(newval); 787355da1ebSSage Weil kfree(xattr); 788355da1ebSSage Weil return err; 789355da1ebSSage Weil } 790355da1ebSSage Weil 791355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 792355da1ebSSage Weil { 7933d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 7943d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 795355da1ebSSage Weil struct inode *inode = dentry->d_inode; 7965f21c96dSSage Weil struct inode *parent_inode; 797355da1ebSSage Weil struct ceph_mds_request *req; 798355da1ebSSage Weil int err; 799355da1ebSSage Weil 800355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 801355da1ebSSage Weil USE_AUTH_MDS); 802355da1ebSSage Weil if (IS_ERR(req)) 803355da1ebSSage Weil return PTR_ERR(req); 80470b666c3SSage Weil req->r_inode = inode; 80570b666c3SSage Weil ihold(inode); 806355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 807355da1ebSSage Weil req->r_num_caps = 1; 808355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 809355da1ebSSage Weil 8105f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 811355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 8125f21c96dSSage Weil iput(parent_inode); 813355da1ebSSage Weil ceph_mdsc_put_request(req); 814355da1ebSSage Weil return err; 815355da1ebSSage Weil } 816355da1ebSSage Weil 817355da1ebSSage Weil int ceph_removexattr(struct dentry *dentry, const char *name) 818355da1ebSSage Weil { 819355da1ebSSage Weil struct inode *inode = dentry->d_inode; 82006476a69SAlex Elder struct ceph_vxattr_cb *vxattr; 821355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 822355da1ebSSage Weil int issued; 823355da1ebSSage Weil int err; 82483eb26afSAlex Elder int required_blob_size; 825fca65b4aSSage Weil int dirty; 826355da1ebSSage Weil 827355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 828355da1ebSSage Weil return -EROFS; 829355da1ebSSage Weil 830355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 831355da1ebSSage Weil return -EOPNOTSUPP; 832355da1ebSSage Weil 83306476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 834355da1ebSSage Weil if (vxattr && vxattr->readonly) 835355da1ebSSage Weil return -EOPNOTSUPP; 836355da1ebSSage Weil 83783eb26afSAlex Elder err = -ENOMEM; 838be655596SSage Weil spin_lock(&ci->i_ceph_lock); 839355da1ebSSage Weil __build_xattrs(inode); 84083eb26afSAlex Elder retry: 841355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 842355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 843355da1ebSSage Weil 844355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 845355da1ebSSage Weil goto do_sync; 846355da1ebSSage Weil 84783eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 84883eb26afSAlex Elder 84983eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 85083eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 85183eb26afSAlex Elder struct ceph_buffer *blob; 85283eb26afSAlex Elder 85383eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 85483eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 85583eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 85683eb26afSAlex Elder if (!blob) 85783eb26afSAlex Elder goto out; 85883eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 85983eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 86083eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 86183eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 86283eb26afSAlex Elder goto retry; 86383eb26afSAlex Elder } 86483eb26afSAlex Elder 865355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 866fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 867355da1ebSSage Weil ci->i_xattrs.dirty = true; 868355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 869355da1ebSSage Weil 870be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 871fca65b4aSSage Weil if (dirty) 872fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 873355da1ebSSage Weil return err; 874355da1ebSSage Weil do_sync: 875be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 876355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 87783eb26afSAlex Elder out: 878355da1ebSSage Weil return err; 879355da1ebSSage Weil } 880355da1ebSSage Weil 881