13d14c5d2SYehuda Sadeh #include <linux/ceph/ceph_debug.h> 23d14c5d2SYehuda Sadeh 3355da1ebSSage Weil #include "super.h" 43d14c5d2SYehuda Sadeh #include "mds_client.h" 53d14c5d2SYehuda Sadeh 63d14c5d2SYehuda Sadeh #include <linux/ceph/decode.h> 7355da1ebSSage Weil 8355da1ebSSage Weil #include <linux/xattr.h> 95a0e3ad6STejun Heo #include <linux/slab.h> 10355da1ebSSage Weil 1122891907SAlex Elder #define XATTR_CEPH_PREFIX "ceph." 1222891907SAlex Elder #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) 1322891907SAlex Elder 14355da1ebSSage Weil static bool ceph_is_valid_xattr(const char *name) 15355da1ebSSage Weil { 1622891907SAlex Elder return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || 171a756278SSage Weil !strncmp(name, XATTR_SECURITY_PREFIX, 18355da1ebSSage Weil XATTR_SECURITY_PREFIX_LEN) || 19355da1ebSSage Weil !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || 20355da1ebSSage Weil !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 21355da1ebSSage Weil } 22355da1ebSSage Weil 23355da1ebSSage Weil /* 24355da1ebSSage Weil * These define virtual xattrs exposing the recursive directory 25355da1ebSSage Weil * statistics and layout metadata. 26355da1ebSSage Weil */ 27881a5fa2SAlex Elder struct ceph_vxattr { 28355da1ebSSage Weil char *name; 293ce6cd12SAlex Elder size_t name_size; /* strlen(name) + 1 (for '\0') */ 30355da1ebSSage Weil size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, 31355da1ebSSage Weil size_t size); 328860147aSSage Weil bool readonly, hidden; 33f36e4472SSage Weil bool (*exists_cb)(struct ceph_inode_info *ci); 34355da1ebSSage Weil }; 35355da1ebSSage Weil 36*32ab0bd7SSage Weil /* layouts */ 37*32ab0bd7SSage Weil 38*32ab0bd7SSage Weil static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) 39*32ab0bd7SSage Weil { 40*32ab0bd7SSage Weil size_t s; 41*32ab0bd7SSage Weil char *p = (char *)&ci->i_layout; 42*32ab0bd7SSage Weil 43*32ab0bd7SSage Weil for (s = 0; s < sizeof(ci->i_layout); s++, p++) 44*32ab0bd7SSage Weil if (*p) 45*32ab0bd7SSage Weil return true; 46*32ab0bd7SSage Weil return false; 47*32ab0bd7SSage Weil } 48*32ab0bd7SSage Weil 49*32ab0bd7SSage Weil static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, 50*32ab0bd7SSage Weil size_t size) 51*32ab0bd7SSage Weil { 52*32ab0bd7SSage Weil int ret; 53*32ab0bd7SSage Weil struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); 54*32ab0bd7SSage Weil struct ceph_osd_client *osdc = &fsc->client->osdc; 55*32ab0bd7SSage Weil s64 pool = ceph_file_layout_pg_pool(ci->i_layout); 56*32ab0bd7SSage Weil const char *pool_name; 57*32ab0bd7SSage Weil 58*32ab0bd7SSage Weil dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); 59*32ab0bd7SSage Weil down_read(&osdc->map_sem); 60*32ab0bd7SSage Weil pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); 61*32ab0bd7SSage Weil if (pool_name) 62*32ab0bd7SSage Weil ret = snprintf(val, size, 63*32ab0bd7SSage Weil "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%s", 64*32ab0bd7SSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 65*32ab0bd7SSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 66*32ab0bd7SSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout), 67*32ab0bd7SSage Weil pool_name); 68*32ab0bd7SSage Weil else 69*32ab0bd7SSage Weil ret = snprintf(val, size, 70*32ab0bd7SSage Weil "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld", 71*32ab0bd7SSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 72*32ab0bd7SSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 73*32ab0bd7SSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout), 74*32ab0bd7SSage Weil (unsigned long long)pool); 75*32ab0bd7SSage Weil 76*32ab0bd7SSage Weil up_read(&osdc->map_sem); 77*32ab0bd7SSage Weil return ret; 78*32ab0bd7SSage Weil } 79*32ab0bd7SSage Weil 80355da1ebSSage Weil /* directories */ 81355da1ebSSage Weil 82aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, 83355da1ebSSage Weil size_t size) 84355da1ebSSage Weil { 85355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); 86355da1ebSSage Weil } 87355da1ebSSage Weil 88aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, 89355da1ebSSage Weil size_t size) 90355da1ebSSage Weil { 91355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files); 92355da1ebSSage Weil } 93355da1ebSSage Weil 94aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, 95355da1ebSSage Weil size_t size) 96355da1ebSSage Weil { 97355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_subdirs); 98355da1ebSSage Weil } 99355da1ebSSage Weil 100aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, 101355da1ebSSage Weil size_t size) 102355da1ebSSage Weil { 103355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); 104355da1ebSSage Weil } 105355da1ebSSage Weil 106aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, 107355da1ebSSage Weil size_t size) 108355da1ebSSage Weil { 109355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles); 110355da1ebSSage Weil } 111355da1ebSSage Weil 112aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, 113355da1ebSSage Weil size_t size) 114355da1ebSSage Weil { 115355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rsubdirs); 116355da1ebSSage Weil } 117355da1ebSSage Weil 118aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, 119355da1ebSSage Weil size_t size) 120355da1ebSSage Weil { 121355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rbytes); 122355da1ebSSage Weil } 123355da1ebSSage Weil 124aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, 125355da1ebSSage Weil size_t size) 126355da1ebSSage Weil { 1273489b42aSAlex Elder return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, 128355da1ebSSage Weil (long)ci->i_rctime.tv_nsec); 129355da1ebSSage Weil } 130355da1ebSSage Weil 131*32ab0bd7SSage Weil 132eb788084SAlex Elder #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name 133eb788084SAlex Elder 134eb788084SAlex Elder #define XATTR_NAME_CEPH(_type, _name) \ 135eb788084SAlex Elder { \ 136eb788084SAlex Elder .name = CEPH_XATTR_NAME(_type, _name), \ 1373ce6cd12SAlex Elder .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ 138aa4066edSAlex Elder .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ 139eb788084SAlex Elder .readonly = true, \ 1408860147aSSage Weil .hidden = false, \ 141f36e4472SSage Weil .exists_cb = NULL, \ 142eb788084SAlex Elder } 143eb788084SAlex Elder 144881a5fa2SAlex Elder static struct ceph_vxattr ceph_dir_vxattrs[] = { 145eb788084SAlex Elder XATTR_NAME_CEPH(dir, entries), 146eb788084SAlex Elder XATTR_NAME_CEPH(dir, files), 147eb788084SAlex Elder XATTR_NAME_CEPH(dir, subdirs), 148eb788084SAlex Elder XATTR_NAME_CEPH(dir, rentries), 149eb788084SAlex Elder XATTR_NAME_CEPH(dir, rfiles), 150eb788084SAlex Elder XATTR_NAME_CEPH(dir, rsubdirs), 151eb788084SAlex Elder XATTR_NAME_CEPH(dir, rbytes), 152eb788084SAlex Elder XATTR_NAME_CEPH(dir, rctime), 153eb788084SAlex Elder { 0 } /* Required table terminator */ 154355da1ebSSage Weil }; 1553ce6cd12SAlex Elder static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ 156355da1ebSSage Weil 157355da1ebSSage Weil /* files */ 158355da1ebSSage Weil 159881a5fa2SAlex Elder static struct ceph_vxattr ceph_file_vxattrs[] = { 160*32ab0bd7SSage Weil { 161*32ab0bd7SSage Weil .name = "ceph.file.layout", 162*32ab0bd7SSage Weil .name_size = sizeof("ceph.file.layout"), 163*32ab0bd7SSage Weil .getxattr_cb = ceph_vxattrcb_layout, 164*32ab0bd7SSage Weil .readonly = false, 165*32ab0bd7SSage Weil .hidden = false, 166*32ab0bd7SSage Weil .exists_cb = ceph_vxattrcb_layout_exists, 167*32ab0bd7SSage Weil }, 168eb788084SAlex Elder { 0 } /* Required table terminator */ 169355da1ebSSage Weil }; 1703ce6cd12SAlex Elder static size_t ceph_file_vxattrs_name_size; /* total size of all names */ 171355da1ebSSage Weil 172881a5fa2SAlex Elder static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) 173355da1ebSSage Weil { 174355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 175355da1ebSSage Weil return ceph_dir_vxattrs; 176355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 177355da1ebSSage Weil return ceph_file_vxattrs; 178355da1ebSSage Weil return NULL; 179355da1ebSSage Weil } 180355da1ebSSage Weil 1813ce6cd12SAlex Elder static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) 1823ce6cd12SAlex Elder { 1833ce6cd12SAlex Elder if (vxattrs == ceph_dir_vxattrs) 1843ce6cd12SAlex Elder return ceph_dir_vxattrs_name_size; 1853ce6cd12SAlex Elder if (vxattrs == ceph_file_vxattrs) 1863ce6cd12SAlex Elder return ceph_file_vxattrs_name_size; 1873ce6cd12SAlex Elder BUG(); 1883ce6cd12SAlex Elder 1893ce6cd12SAlex Elder return 0; 1903ce6cd12SAlex Elder } 1913ce6cd12SAlex Elder 1923ce6cd12SAlex Elder /* 1933ce6cd12SAlex Elder * Compute the aggregate size (including terminating '\0') of all 1943ce6cd12SAlex Elder * virtual extended attribute names in the given vxattr table. 1953ce6cd12SAlex Elder */ 1963ce6cd12SAlex Elder static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) 1973ce6cd12SAlex Elder { 1983ce6cd12SAlex Elder struct ceph_vxattr *vxattr; 1993ce6cd12SAlex Elder size_t size = 0; 2003ce6cd12SAlex Elder 2013ce6cd12SAlex Elder for (vxattr = vxattrs; vxattr->name; vxattr++) 2028860147aSSage Weil if (!vxattr->hidden) 2033ce6cd12SAlex Elder size += vxattr->name_size; 2043ce6cd12SAlex Elder 2053ce6cd12SAlex Elder return size; 2063ce6cd12SAlex Elder } 2073ce6cd12SAlex Elder 2083ce6cd12SAlex Elder /* Routines called at initialization and exit time */ 2093ce6cd12SAlex Elder 2103ce6cd12SAlex Elder void __init ceph_xattr_init(void) 2113ce6cd12SAlex Elder { 2123ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); 2133ce6cd12SAlex Elder ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); 2143ce6cd12SAlex Elder } 2153ce6cd12SAlex Elder 2163ce6cd12SAlex Elder void ceph_xattr_exit(void) 2173ce6cd12SAlex Elder { 2183ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = 0; 2193ce6cd12SAlex Elder ceph_file_vxattrs_name_size = 0; 2203ce6cd12SAlex Elder } 2213ce6cd12SAlex Elder 222881a5fa2SAlex Elder static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, 223355da1ebSSage Weil const char *name) 224355da1ebSSage Weil { 225881a5fa2SAlex Elder struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); 22606476a69SAlex Elder 22706476a69SAlex Elder if (vxattr) { 22806476a69SAlex Elder while (vxattr->name) { 22906476a69SAlex Elder if (!strcmp(vxattr->name, name)) 230355da1ebSSage Weil return vxattr; 231355da1ebSSage Weil vxattr++; 23206476a69SAlex Elder } 23306476a69SAlex Elder } 23406476a69SAlex Elder 235355da1ebSSage Weil return NULL; 236355da1ebSSage Weil } 237355da1ebSSage Weil 238355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 239355da1ebSSage Weil const char *name, int name_len, 240355da1ebSSage Weil const char *val, int val_len, 241355da1ebSSage Weil int dirty, 242355da1ebSSage Weil int should_free_name, int should_free_val, 243355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 244355da1ebSSage Weil { 245355da1ebSSage Weil struct rb_node **p; 246355da1ebSSage Weil struct rb_node *parent = NULL; 247355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 248355da1ebSSage Weil int c; 249355da1ebSSage Weil int new = 0; 250355da1ebSSage Weil 251355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 252355da1ebSSage Weil while (*p) { 253355da1ebSSage Weil parent = *p; 254355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 255355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 256355da1ebSSage Weil if (c < 0) 257355da1ebSSage Weil p = &(*p)->rb_left; 258355da1ebSSage Weil else if (c > 0) 259355da1ebSSage Weil p = &(*p)->rb_right; 260355da1ebSSage Weil else { 261355da1ebSSage Weil if (name_len == xattr->name_len) 262355da1ebSSage Weil break; 263355da1ebSSage Weil else if (name_len < xattr->name_len) 264355da1ebSSage Weil p = &(*p)->rb_left; 265355da1ebSSage Weil else 266355da1ebSSage Weil p = &(*p)->rb_right; 267355da1ebSSage Weil } 268355da1ebSSage Weil xattr = NULL; 269355da1ebSSage Weil } 270355da1ebSSage Weil 271355da1ebSSage Weil if (!xattr) { 272355da1ebSSage Weil new = 1; 273355da1ebSSage Weil xattr = *newxattr; 274355da1ebSSage Weil xattr->name = name; 275355da1ebSSage Weil xattr->name_len = name_len; 276355da1ebSSage Weil xattr->should_free_name = should_free_name; 277355da1ebSSage Weil 278355da1ebSSage Weil ci->i_xattrs.count++; 279355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 280355da1ebSSage Weil } else { 281355da1ebSSage Weil kfree(*newxattr); 282355da1ebSSage Weil *newxattr = NULL; 283355da1ebSSage Weil if (xattr->should_free_val) 284355da1ebSSage Weil kfree((void *)xattr->val); 285355da1ebSSage Weil 286355da1ebSSage Weil if (should_free_name) { 287355da1ebSSage Weil kfree((void *)name); 288355da1ebSSage Weil name = xattr->name; 289355da1ebSSage Weil } 290355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 291355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 292355da1ebSSage Weil } 293355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 294355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 295355da1ebSSage Weil if (val) 296355da1ebSSage Weil xattr->val = val; 297355da1ebSSage Weil else 298355da1ebSSage Weil xattr->val = ""; 299355da1ebSSage Weil 300355da1ebSSage Weil xattr->val_len = val_len; 301355da1ebSSage Weil xattr->dirty = dirty; 302355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 303355da1ebSSage Weil 304355da1ebSSage Weil if (new) { 305355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 306355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 307355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 308355da1ebSSage Weil } 309355da1ebSSage Weil 310355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 311355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 312355da1ebSSage Weil 313355da1ebSSage Weil return 0; 314355da1ebSSage Weil } 315355da1ebSSage Weil 316355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 317355da1ebSSage Weil const char *name) 318355da1ebSSage Weil { 319355da1ebSSage Weil struct rb_node **p; 320355da1ebSSage Weil struct rb_node *parent = NULL; 321355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 32217db143fSSage Weil int name_len = strlen(name); 323355da1ebSSage Weil int c; 324355da1ebSSage Weil 325355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 326355da1ebSSage Weil while (*p) { 327355da1ebSSage Weil parent = *p; 328355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 329355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 33017db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 33117db143fSSage Weil c = 1; 332355da1ebSSage Weil if (c < 0) 333355da1ebSSage Weil p = &(*p)->rb_left; 334355da1ebSSage Weil else if (c > 0) 335355da1ebSSage Weil p = &(*p)->rb_right; 336355da1ebSSage Weil else { 337355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 338355da1ebSSage Weil xattr->val_len, xattr->val); 339355da1ebSSage Weil return xattr; 340355da1ebSSage Weil } 341355da1ebSSage Weil } 342355da1ebSSage Weil 343355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 344355da1ebSSage Weil 345355da1ebSSage Weil return NULL; 346355da1ebSSage Weil } 347355da1ebSSage Weil 348355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 349355da1ebSSage Weil { 350355da1ebSSage Weil BUG_ON(!xattr); 351355da1ebSSage Weil 352355da1ebSSage Weil if (xattr->should_free_name) 353355da1ebSSage Weil kfree((void *)xattr->name); 354355da1ebSSage Weil if (xattr->should_free_val) 355355da1ebSSage Weil kfree((void *)xattr->val); 356355da1ebSSage Weil 357355da1ebSSage Weil kfree(xattr); 358355da1ebSSage Weil } 359355da1ebSSage Weil 360355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 361355da1ebSSage Weil struct ceph_inode_xattr *xattr) 362355da1ebSSage Weil { 363355da1ebSSage Weil if (!xattr) 364355da1ebSSage Weil return -EOPNOTSUPP; 365355da1ebSSage Weil 366355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 367355da1ebSSage Weil 368355da1ebSSage Weil if (xattr->should_free_name) 369355da1ebSSage Weil kfree((void *)xattr->name); 370355da1ebSSage Weil if (xattr->should_free_val) 371355da1ebSSage Weil kfree((void *)xattr->val); 372355da1ebSSage Weil 373355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 374355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 375355da1ebSSage Weil ci->i_xattrs.count--; 376355da1ebSSage Weil kfree(xattr); 377355da1ebSSage Weil 378355da1ebSSage Weil return 0; 379355da1ebSSage Weil } 380355da1ebSSage Weil 381355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 382355da1ebSSage Weil const char *name) 383355da1ebSSage Weil { 384355da1ebSSage Weil struct rb_node **p; 385355da1ebSSage Weil struct ceph_inode_xattr *xattr; 386355da1ebSSage Weil int err; 387355da1ebSSage Weil 388355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 389355da1ebSSage Weil xattr = __get_xattr(ci, name); 390355da1ebSSage Weil err = __remove_xattr(ci, xattr); 391355da1ebSSage Weil return err; 392355da1ebSSage Weil } 393355da1ebSSage Weil 394355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 395355da1ebSSage Weil char *dest) 396355da1ebSSage Weil { 397355da1ebSSage Weil struct rb_node *p; 398355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 399355da1ebSSage Weil 400355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 401355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 402355da1ebSSage Weil 403355da1ebSSage Weil while (p) { 404355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 405355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 406355da1ebSSage Weil dest[xattr->name_len] = '\0'; 407355da1ebSSage Weil 408355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 409355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 410355da1ebSSage Weil 411355da1ebSSage Weil dest += xattr->name_len + 1; 412355da1ebSSage Weil p = rb_next(p); 413355da1ebSSage Weil } 414355da1ebSSage Weil 415355da1ebSSage Weil return dest; 416355da1ebSSage Weil } 417355da1ebSSage Weil 418355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 419355da1ebSSage Weil { 420355da1ebSSage Weil struct rb_node *p, *tmp; 421355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 422355da1ebSSage Weil 423355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 424355da1ebSSage Weil 425355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 426355da1ebSSage Weil 427355da1ebSSage Weil while (p) { 428355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 429355da1ebSSage Weil tmp = p; 430355da1ebSSage Weil p = rb_next(tmp); 431355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 432355da1ebSSage Weil xattr->name_len, xattr->name); 433355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 434355da1ebSSage Weil 435355da1ebSSage Weil __free_xattr(xattr); 436355da1ebSSage Weil } 437355da1ebSSage Weil 438355da1ebSSage Weil ci->i_xattrs.names_size = 0; 439355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 440355da1ebSSage Weil ci->i_xattrs.index_version = 0; 441355da1ebSSage Weil ci->i_xattrs.count = 0; 442355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 443355da1ebSSage Weil } 444355da1ebSSage Weil 445355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 446be655596SSage Weil __releases(ci->i_ceph_lock) 447be655596SSage Weil __acquires(ci->i_ceph_lock) 448355da1ebSSage Weil { 449355da1ebSSage Weil u32 namelen; 450355da1ebSSage Weil u32 numattr = 0; 451355da1ebSSage Weil void *p, *end; 452355da1ebSSage Weil u32 len; 453355da1ebSSage Weil const char *name, *val; 454355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 455355da1ebSSage Weil int xattr_version; 456355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 45763ff78b2SSage Weil int err = 0; 458355da1ebSSage Weil int i; 459355da1ebSSage Weil 460355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 461355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 462355da1ebSSage Weil 463355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 464355da1ebSSage Weil return 0; /* already built */ 465355da1ebSSage Weil 466355da1ebSSage Weil __ceph_destroy_xattrs(ci); 467355da1ebSSage Weil 468355da1ebSSage Weil start: 469355da1ebSSage Weil /* updated internal xattr rb tree */ 470355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 471355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 472355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 473355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 474355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 475be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 476355da1ebSSage Weil 477355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 478355da1ebSSage Weil GFP_NOFS); 479355da1ebSSage Weil err = -ENOMEM; 480355da1ebSSage Weil if (!xattrs) 481355da1ebSSage Weil goto bad_lock; 482355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 483355da1ebSSage Weil for (i = 0; i < numattr; i++) { 484355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 485355da1ebSSage Weil GFP_NOFS); 486355da1ebSSage Weil if (!xattrs[i]) 487355da1ebSSage Weil goto bad_lock; 488355da1ebSSage Weil } 489355da1ebSSage Weil 490be655596SSage Weil spin_lock(&ci->i_ceph_lock); 491355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 492355da1ebSSage Weil /* lost a race, retry */ 493355da1ebSSage Weil for (i = 0; i < numattr; i++) 494355da1ebSSage Weil kfree(xattrs[i]); 495355da1ebSSage Weil kfree(xattrs); 49621ec6ffaSAlan Cox xattrs = NULL; 497355da1ebSSage Weil goto start; 498355da1ebSSage Weil } 499355da1ebSSage Weil err = -EIO; 500355da1ebSSage Weil while (numattr--) { 501355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 502355da1ebSSage Weil namelen = len; 503355da1ebSSage Weil name = p; 504355da1ebSSage Weil p += len; 505355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 506355da1ebSSage Weil val = p; 507355da1ebSSage Weil p += len; 508355da1ebSSage Weil 509355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 510355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 511355da1ebSSage Weil 512355da1ebSSage Weil if (err < 0) 513355da1ebSSage Weil goto bad; 514355da1ebSSage Weil } 515355da1ebSSage Weil kfree(xattrs); 516355da1ebSSage Weil } 517355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 518355da1ebSSage Weil ci->i_xattrs.dirty = false; 519355da1ebSSage Weil 520355da1ebSSage Weil return err; 521355da1ebSSage Weil bad_lock: 522be655596SSage Weil spin_lock(&ci->i_ceph_lock); 523355da1ebSSage Weil bad: 524355da1ebSSage Weil if (xattrs) { 525355da1ebSSage Weil for (i = 0; i < numattr; i++) 526355da1ebSSage Weil kfree(xattrs[i]); 527355da1ebSSage Weil kfree(xattrs); 528355da1ebSSage Weil } 529355da1ebSSage Weil ci->i_xattrs.names_size = 0; 530355da1ebSSage Weil return err; 531355da1ebSSage Weil } 532355da1ebSSage Weil 533355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 534355da1ebSSage Weil int val_size) 535355da1ebSSage Weil { 536355da1ebSSage Weil /* 537355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 538355da1ebSSage Weil * 4 bytes per each value 539355da1ebSSage Weil */ 540355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 541355da1ebSSage Weil ci->i_xattrs.names_size + 542355da1ebSSage Weil ci->i_xattrs.vals_size; 543355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 544355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 545355da1ebSSage Weil ci->i_xattrs.vals_size); 546355da1ebSSage Weil 547355da1ebSSage Weil if (name_size) 548355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 549355da1ebSSage Weil 550355da1ebSSage Weil return size; 551355da1ebSSage Weil } 552355da1ebSSage Weil 553355da1ebSSage Weil /* 554355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 555355da1ebSSage Weil * and swap into place. 556355da1ebSSage Weil */ 557355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 558355da1ebSSage Weil { 559355da1ebSSage Weil struct rb_node *p; 560355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 561355da1ebSSage Weil void *dest; 562355da1ebSSage Weil 563355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 564355da1ebSSage Weil if (ci->i_xattrs.dirty) { 565355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 566355da1ebSSage Weil 567355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 568355da1ebSSage Weil 569355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 570355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 571355da1ebSSage Weil 572355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 573355da1ebSSage Weil while (p) { 574355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 575355da1ebSSage Weil 576355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 577355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 578355da1ebSSage Weil dest += xattr->name_len; 579355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 580355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 581355da1ebSSage Weil dest += xattr->val_len; 582355da1ebSSage Weil 583355da1ebSSage Weil p = rb_next(p); 584355da1ebSSage Weil } 585355da1ebSSage Weil 586355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 587355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 588355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 589355da1ebSSage Weil 590b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 591355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 592355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 593355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 594355da1ebSSage Weil ci->i_xattrs.dirty = false; 5954a625be4SSage Weil ci->i_xattrs.version++; 596355da1ebSSage Weil } 597355da1ebSSage Weil } 598355da1ebSSage Weil 599355da1ebSSage Weil ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 600355da1ebSSage Weil size_t size) 601355da1ebSSage Weil { 602355da1ebSSage Weil struct inode *inode = dentry->d_inode; 603355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 604355da1ebSSage Weil int err; 605355da1ebSSage Weil struct ceph_inode_xattr *xattr; 606881a5fa2SAlex Elder struct ceph_vxattr *vxattr = NULL; 607355da1ebSSage Weil 608355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 609355da1ebSSage Weil return -ENODATA; 610355da1ebSSage Weil 611be655596SSage Weil spin_lock(&ci->i_ceph_lock); 612355da1ebSSage Weil dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 613355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 614355da1ebSSage Weil 6150bee82fbSSage Weil /* let's see if a virtual xattr was requested */ 6160bee82fbSSage Weil vxattr = ceph_match_vxattr(inode, name); 6170bee82fbSSage Weil if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { 6180bee82fbSSage Weil err = vxattr->getxattr_cb(ci, value, size); 6190bee82fbSSage Weil goto out; 6200bee82fbSSage Weil } 6210bee82fbSSage Weil 622355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 623355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 624355da1ebSSage Weil goto get_xattr; 625355da1ebSSage Weil } else { 626be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 627355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 628355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 629355da1ebSSage Weil if (err) 630355da1ebSSage Weil return err; 631355da1ebSSage Weil } 632355da1ebSSage Weil 633be655596SSage Weil spin_lock(&ci->i_ceph_lock); 634355da1ebSSage Weil 635355da1ebSSage Weil err = __build_xattrs(inode); 636355da1ebSSage Weil if (err < 0) 637355da1ebSSage Weil goto out; 638355da1ebSSage Weil 639355da1ebSSage Weil get_xattr: 640355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 641355da1ebSSage Weil xattr = __get_xattr(ci, name); 6420bee82fbSSage Weil if (!xattr) 643355da1ebSSage Weil goto out; 644355da1ebSSage Weil 645355da1ebSSage Weil err = -ERANGE; 646355da1ebSSage Weil if (size && size < xattr->val_len) 647355da1ebSSage Weil goto out; 648355da1ebSSage Weil 649355da1ebSSage Weil err = xattr->val_len; 650355da1ebSSage Weil if (size == 0) 651355da1ebSSage Weil goto out; 652355da1ebSSage Weil 653355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 654355da1ebSSage Weil 655355da1ebSSage Weil out: 656be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 657355da1ebSSage Weil return err; 658355da1ebSSage Weil } 659355da1ebSSage Weil 660355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 661355da1ebSSage Weil { 662355da1ebSSage Weil struct inode *inode = dentry->d_inode; 663355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 664881a5fa2SAlex Elder struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); 665355da1ebSSage Weil u32 vir_namelen = 0; 666355da1ebSSage Weil u32 namelen; 667355da1ebSSage Weil int err; 668355da1ebSSage Weil u32 len; 669355da1ebSSage Weil int i; 670355da1ebSSage Weil 671be655596SSage Weil spin_lock(&ci->i_ceph_lock); 672355da1ebSSage Weil dout("listxattr %p ver=%lld index_ver=%lld\n", inode, 673355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 674355da1ebSSage Weil 675355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 676bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 677355da1ebSSage Weil goto list_xattr; 678355da1ebSSage Weil } else { 679be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 680355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 681355da1ebSSage Weil if (err) 682355da1ebSSage Weil return err; 683355da1ebSSage Weil } 684355da1ebSSage Weil 685be655596SSage Weil spin_lock(&ci->i_ceph_lock); 686355da1ebSSage Weil 687355da1ebSSage Weil err = __build_xattrs(inode); 688355da1ebSSage Weil if (err < 0) 689355da1ebSSage Weil goto out; 690355da1ebSSage Weil 691355da1ebSSage Weil list_xattr: 6923ce6cd12SAlex Elder /* 6933ce6cd12SAlex Elder * Start with virtual dir xattr names (if any) (including 6943ce6cd12SAlex Elder * terminating '\0' characters for each). 6953ce6cd12SAlex Elder */ 6963ce6cd12SAlex Elder vir_namelen = ceph_vxattrs_name_size(vxattrs); 6973ce6cd12SAlex Elder 698355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 699b65917ddSSage Weil namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; 700355da1ebSSage Weil err = -ERANGE; 701b65917ddSSage Weil if (size && vir_namelen + namelen > size) 702355da1ebSSage Weil goto out; 703355da1ebSSage Weil 704b65917ddSSage Weil err = namelen + vir_namelen; 705355da1ebSSage Weil if (size == 0) 706355da1ebSSage Weil goto out; 707355da1ebSSage Weil 708355da1ebSSage Weil names = __copy_xattr_names(ci, names); 709355da1ebSSage Weil 710355da1ebSSage Weil /* virtual xattr names, too */ 711b65917ddSSage Weil err = namelen; 712b65917ddSSage Weil if (vxattrs) { 713355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 714b65917ddSSage Weil if (!vxattrs[i].hidden && 715b65917ddSSage Weil !(vxattrs[i].exists_cb && 716b65917ddSSage Weil !vxattrs[i].exists_cb(ci))) { 717355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 718355da1ebSSage Weil names += len + 1; 719b65917ddSSage Weil err += len + 1; 720b65917ddSSage Weil } 721b65917ddSSage Weil } 722355da1ebSSage Weil } 723355da1ebSSage Weil 724355da1ebSSage Weil out: 725be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 726355da1ebSSage Weil return err; 727355da1ebSSage Weil } 728355da1ebSSage Weil 729355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 730355da1ebSSage Weil const char *value, size_t size, int flags) 731355da1ebSSage Weil { 7323d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 733355da1ebSSage Weil struct inode *inode = dentry->d_inode; 734355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 7355f21c96dSSage Weil struct inode *parent_inode; 736355da1ebSSage Weil struct ceph_mds_request *req; 7373d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 738355da1ebSSage Weil int err; 739355da1ebSSage Weil int i, nr_pages; 740355da1ebSSage Weil struct page **pages = NULL; 741355da1ebSSage Weil void *kaddr; 742355da1ebSSage Weil 743355da1ebSSage Weil /* copy value into some pages */ 744355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 745355da1ebSSage Weil if (nr_pages) { 746355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 747355da1ebSSage Weil if (!pages) 748355da1ebSSage Weil return -ENOMEM; 749355da1ebSSage Weil err = -ENOMEM; 750355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 75131459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 752355da1ebSSage Weil if (!pages[i]) { 753355da1ebSSage Weil nr_pages = i; 754355da1ebSSage Weil goto out; 755355da1ebSSage Weil } 756355da1ebSSage Weil kaddr = kmap(pages[i]); 757355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 758355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 759355da1ebSSage Weil } 760355da1ebSSage Weil } 761355da1ebSSage Weil 762355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 763355da1ebSSage Weil 764355da1ebSSage Weil /* do request */ 765355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 766355da1ebSSage Weil USE_AUTH_MDS); 76760d87733SJulia Lawall if (IS_ERR(req)) { 76860d87733SJulia Lawall err = PTR_ERR(req); 76960d87733SJulia Lawall goto out; 77060d87733SJulia Lawall } 77170b666c3SSage Weil req->r_inode = inode; 77270b666c3SSage Weil ihold(inode); 773355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 774355da1ebSSage Weil req->r_num_caps = 1; 775355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 776355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 777355da1ebSSage Weil 778355da1ebSSage Weil req->r_pages = pages; 779355da1ebSSage Weil req->r_num_pages = nr_pages; 780355da1ebSSage Weil req->r_data_len = size; 781355da1ebSSage Weil 782355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 7835f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 784355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 7855f21c96dSSage Weil iput(parent_inode); 786355da1ebSSage Weil ceph_mdsc_put_request(req); 787355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 788355da1ebSSage Weil 789355da1ebSSage Weil out: 790355da1ebSSage Weil if (pages) { 791355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 792355da1ebSSage Weil __free_page(pages[i]); 793355da1ebSSage Weil kfree(pages); 794355da1ebSSage Weil } 795355da1ebSSage Weil return err; 796355da1ebSSage Weil } 797355da1ebSSage Weil 798355da1ebSSage Weil int ceph_setxattr(struct dentry *dentry, const char *name, 799355da1ebSSage Weil const void *value, size_t size, int flags) 800355da1ebSSage Weil { 801355da1ebSSage Weil struct inode *inode = dentry->d_inode; 802881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 803355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 80418fa8b3fSAlex Elder int issued; 805355da1ebSSage Weil int err; 80618fa8b3fSAlex Elder int dirty; 807355da1ebSSage Weil int name_len = strlen(name); 808355da1ebSSage Weil int val_len = size; 809355da1ebSSage Weil char *newname = NULL; 810355da1ebSSage Weil char *newval = NULL; 811355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 812355da1ebSSage Weil int required_blob_size; 813355da1ebSSage Weil 814355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 815355da1ebSSage Weil return -EROFS; 816355da1ebSSage Weil 817355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 818355da1ebSSage Weil return -EOPNOTSUPP; 819355da1ebSSage Weil 82006476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 821355da1ebSSage Weil if (vxattr && vxattr->readonly) 822355da1ebSSage Weil return -EOPNOTSUPP; 823355da1ebSSage Weil 8243adf654dSSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 8253adf654dSSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 8263adf654dSSage Weil goto do_sync_unlocked; 8273adf654dSSage Weil 828355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 829355da1ebSSage Weil err = -ENOMEM; 83061413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 831355da1ebSSage Weil if (!newname) 832355da1ebSSage Weil goto out; 833355da1ebSSage Weil 834355da1ebSSage Weil if (val_len) { 835b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 836355da1ebSSage Weil if (!newval) 837355da1ebSSage Weil goto out; 838355da1ebSSage Weil } 839355da1ebSSage Weil 840355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 841355da1ebSSage Weil if (!xattr) 842355da1ebSSage Weil goto out; 843355da1ebSSage Weil 844be655596SSage Weil spin_lock(&ci->i_ceph_lock); 845355da1ebSSage Weil retry: 846355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 84718fa8b3fSAlex Elder dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 848355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 849355da1ebSSage Weil goto do_sync; 850355da1ebSSage Weil __build_xattrs(inode); 851355da1ebSSage Weil 852355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 853355da1ebSSage Weil 854355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 855355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 85618fa8b3fSAlex Elder struct ceph_buffer *blob; 857355da1ebSSage Weil 858be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 859355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 860b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 861355da1ebSSage Weil if (!blob) 862355da1ebSSage Weil goto out; 863be655596SSage Weil spin_lock(&ci->i_ceph_lock); 864b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 865355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 866355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 867355da1ebSSage Weil goto retry; 868355da1ebSSage Weil } 869355da1ebSSage Weil 870355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 871355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 87218fa8b3fSAlex Elder 873fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 874355da1ebSSage Weil ci->i_xattrs.dirty = true; 875355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 87618fa8b3fSAlex Elder 877be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 878fca65b4aSSage Weil if (dirty) 879fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 880355da1ebSSage Weil return err; 881355da1ebSSage Weil 882355da1ebSSage Weil do_sync: 883be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 8843adf654dSSage Weil do_sync_unlocked: 885355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 886355da1ebSSage Weil out: 887355da1ebSSage Weil kfree(newname); 888355da1ebSSage Weil kfree(newval); 889355da1ebSSage Weil kfree(xattr); 890355da1ebSSage Weil return err; 891355da1ebSSage Weil } 892355da1ebSSage Weil 893355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 894355da1ebSSage Weil { 8953d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 8963d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 897355da1ebSSage Weil struct inode *inode = dentry->d_inode; 8985f21c96dSSage Weil struct inode *parent_inode; 899355da1ebSSage Weil struct ceph_mds_request *req; 900355da1ebSSage Weil int err; 901355da1ebSSage Weil 902355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 903355da1ebSSage Weil USE_AUTH_MDS); 904355da1ebSSage Weil if (IS_ERR(req)) 905355da1ebSSage Weil return PTR_ERR(req); 90670b666c3SSage Weil req->r_inode = inode; 90770b666c3SSage Weil ihold(inode); 908355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 909355da1ebSSage Weil req->r_num_caps = 1; 910355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 911355da1ebSSage Weil 9125f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 913355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 9145f21c96dSSage Weil iput(parent_inode); 915355da1ebSSage Weil ceph_mdsc_put_request(req); 916355da1ebSSage Weil return err; 917355da1ebSSage Weil } 918355da1ebSSage Weil 919355da1ebSSage Weil int ceph_removexattr(struct dentry *dentry, const char *name) 920355da1ebSSage Weil { 921355da1ebSSage Weil struct inode *inode = dentry->d_inode; 922881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 923355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 924355da1ebSSage Weil int issued; 925355da1ebSSage Weil int err; 92683eb26afSAlex Elder int required_blob_size; 927fca65b4aSSage Weil int dirty; 928355da1ebSSage Weil 929355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 930355da1ebSSage Weil return -EROFS; 931355da1ebSSage Weil 932355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 933355da1ebSSage Weil return -EOPNOTSUPP; 934355da1ebSSage Weil 93506476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 936355da1ebSSage Weil if (vxattr && vxattr->readonly) 937355da1ebSSage Weil return -EOPNOTSUPP; 938355da1ebSSage Weil 939d421acb1SSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 940d421acb1SSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 941d421acb1SSage Weil goto do_sync_unlocked; 942d421acb1SSage Weil 94383eb26afSAlex Elder err = -ENOMEM; 944be655596SSage Weil spin_lock(&ci->i_ceph_lock); 94583eb26afSAlex Elder retry: 946355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 947355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 948355da1ebSSage Weil 949355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 950355da1ebSSage Weil goto do_sync; 95118fa8b3fSAlex Elder __build_xattrs(inode); 952355da1ebSSage Weil 95383eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 95483eb26afSAlex Elder 95583eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 95683eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 95783eb26afSAlex Elder struct ceph_buffer *blob; 95883eb26afSAlex Elder 95983eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 96083eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 96183eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 96283eb26afSAlex Elder if (!blob) 96383eb26afSAlex Elder goto out; 96483eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 96583eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 96683eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 96783eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 96883eb26afSAlex Elder goto retry; 96983eb26afSAlex Elder } 97083eb26afSAlex Elder 971355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 97218fa8b3fSAlex Elder 973fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 974355da1ebSSage Weil ci->i_xattrs.dirty = true; 975355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 976be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 977fca65b4aSSage Weil if (dirty) 978fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 979355da1ebSSage Weil return err; 980355da1ebSSage Weil do_sync: 981be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 982d421acb1SSage Weil do_sync_unlocked: 983355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 98483eb26afSAlex Elder out: 985355da1ebSSage Weil return err; 986355da1ebSSage Weil } 987355da1ebSSage Weil 988