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 3632ab0bd7SSage Weil /* layouts */ 3732ab0bd7SSage Weil 3832ab0bd7SSage Weil static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) 3932ab0bd7SSage Weil { 4032ab0bd7SSage Weil size_t s; 4132ab0bd7SSage Weil char *p = (char *)&ci->i_layout; 4232ab0bd7SSage Weil 4332ab0bd7SSage Weil for (s = 0; s < sizeof(ci->i_layout); s++, p++) 4432ab0bd7SSage Weil if (*p) 4532ab0bd7SSage Weil return true; 4632ab0bd7SSage Weil return false; 4732ab0bd7SSage Weil } 4832ab0bd7SSage Weil 4932ab0bd7SSage Weil static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, 5032ab0bd7SSage Weil size_t size) 5132ab0bd7SSage Weil { 5232ab0bd7SSage Weil int ret; 5332ab0bd7SSage Weil struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); 5432ab0bd7SSage Weil struct ceph_osd_client *osdc = &fsc->client->osdc; 5532ab0bd7SSage Weil s64 pool = ceph_file_layout_pg_pool(ci->i_layout); 5632ab0bd7SSage Weil const char *pool_name; 5732ab0bd7SSage Weil 5832ab0bd7SSage Weil dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); 5932ab0bd7SSage Weil down_read(&osdc->map_sem); 6032ab0bd7SSage Weil pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); 6132ab0bd7SSage Weil if (pool_name) 6232ab0bd7SSage Weil ret = snprintf(val, size, 6332ab0bd7SSage Weil "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%s", 6432ab0bd7SSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 6532ab0bd7SSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 6632ab0bd7SSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout), 6732ab0bd7SSage Weil pool_name); 6832ab0bd7SSage Weil else 6932ab0bd7SSage Weil ret = snprintf(val, size, 7032ab0bd7SSage Weil "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld", 7132ab0bd7SSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 7232ab0bd7SSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 7332ab0bd7SSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout), 7432ab0bd7SSage Weil (unsigned long long)pool); 7532ab0bd7SSage Weil 7632ab0bd7SSage Weil up_read(&osdc->map_sem); 7732ab0bd7SSage Weil return ret; 7832ab0bd7SSage Weil } 7932ab0bd7SSage 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 13132ab0bd7SSage 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[] = { 145*1f08f2b0SSage Weil { 146*1f08f2b0SSage Weil .name = "ceph.dir.layout", 147*1f08f2b0SSage Weil .name_size = sizeof("ceph.dir.layout"), 148*1f08f2b0SSage Weil .getxattr_cb = ceph_vxattrcb_layout, 149*1f08f2b0SSage Weil .readonly = false, 150*1f08f2b0SSage Weil .hidden = false, 151*1f08f2b0SSage Weil .exists_cb = ceph_vxattrcb_layout_exists, 152*1f08f2b0SSage Weil }, 153eb788084SAlex Elder XATTR_NAME_CEPH(dir, entries), 154eb788084SAlex Elder XATTR_NAME_CEPH(dir, files), 155eb788084SAlex Elder XATTR_NAME_CEPH(dir, subdirs), 156eb788084SAlex Elder XATTR_NAME_CEPH(dir, rentries), 157eb788084SAlex Elder XATTR_NAME_CEPH(dir, rfiles), 158eb788084SAlex Elder XATTR_NAME_CEPH(dir, rsubdirs), 159eb788084SAlex Elder XATTR_NAME_CEPH(dir, rbytes), 160eb788084SAlex Elder XATTR_NAME_CEPH(dir, rctime), 161eb788084SAlex Elder { 0 } /* Required table terminator */ 162355da1ebSSage Weil }; 1633ce6cd12SAlex Elder static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ 164355da1ebSSage Weil 165355da1ebSSage Weil /* files */ 166355da1ebSSage Weil 167881a5fa2SAlex Elder static struct ceph_vxattr ceph_file_vxattrs[] = { 16832ab0bd7SSage Weil { 16932ab0bd7SSage Weil .name = "ceph.file.layout", 17032ab0bd7SSage Weil .name_size = sizeof("ceph.file.layout"), 17132ab0bd7SSage Weil .getxattr_cb = ceph_vxattrcb_layout, 17232ab0bd7SSage Weil .readonly = false, 17332ab0bd7SSage Weil .hidden = false, 17432ab0bd7SSage Weil .exists_cb = ceph_vxattrcb_layout_exists, 17532ab0bd7SSage Weil }, 176eb788084SAlex Elder { 0 } /* Required table terminator */ 177355da1ebSSage Weil }; 1783ce6cd12SAlex Elder static size_t ceph_file_vxattrs_name_size; /* total size of all names */ 179355da1ebSSage Weil 180881a5fa2SAlex Elder static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) 181355da1ebSSage Weil { 182355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 183355da1ebSSage Weil return ceph_dir_vxattrs; 184355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 185355da1ebSSage Weil return ceph_file_vxattrs; 186355da1ebSSage Weil return NULL; 187355da1ebSSage Weil } 188355da1ebSSage Weil 1893ce6cd12SAlex Elder static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) 1903ce6cd12SAlex Elder { 1913ce6cd12SAlex Elder if (vxattrs == ceph_dir_vxattrs) 1923ce6cd12SAlex Elder return ceph_dir_vxattrs_name_size; 1933ce6cd12SAlex Elder if (vxattrs == ceph_file_vxattrs) 1943ce6cd12SAlex Elder return ceph_file_vxattrs_name_size; 1953ce6cd12SAlex Elder BUG(); 1963ce6cd12SAlex Elder 1973ce6cd12SAlex Elder return 0; 1983ce6cd12SAlex Elder } 1993ce6cd12SAlex Elder 2003ce6cd12SAlex Elder /* 2013ce6cd12SAlex Elder * Compute the aggregate size (including terminating '\0') of all 2023ce6cd12SAlex Elder * virtual extended attribute names in the given vxattr table. 2033ce6cd12SAlex Elder */ 2043ce6cd12SAlex Elder static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) 2053ce6cd12SAlex Elder { 2063ce6cd12SAlex Elder struct ceph_vxattr *vxattr; 2073ce6cd12SAlex Elder size_t size = 0; 2083ce6cd12SAlex Elder 2093ce6cd12SAlex Elder for (vxattr = vxattrs; vxattr->name; vxattr++) 2108860147aSSage Weil if (!vxattr->hidden) 2113ce6cd12SAlex Elder size += vxattr->name_size; 2123ce6cd12SAlex Elder 2133ce6cd12SAlex Elder return size; 2143ce6cd12SAlex Elder } 2153ce6cd12SAlex Elder 2163ce6cd12SAlex Elder /* Routines called at initialization and exit time */ 2173ce6cd12SAlex Elder 2183ce6cd12SAlex Elder void __init ceph_xattr_init(void) 2193ce6cd12SAlex Elder { 2203ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); 2213ce6cd12SAlex Elder ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); 2223ce6cd12SAlex Elder } 2233ce6cd12SAlex Elder 2243ce6cd12SAlex Elder void ceph_xattr_exit(void) 2253ce6cd12SAlex Elder { 2263ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = 0; 2273ce6cd12SAlex Elder ceph_file_vxattrs_name_size = 0; 2283ce6cd12SAlex Elder } 2293ce6cd12SAlex Elder 230881a5fa2SAlex Elder static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, 231355da1ebSSage Weil const char *name) 232355da1ebSSage Weil { 233881a5fa2SAlex Elder struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); 23406476a69SAlex Elder 23506476a69SAlex Elder if (vxattr) { 23606476a69SAlex Elder while (vxattr->name) { 23706476a69SAlex Elder if (!strcmp(vxattr->name, name)) 238355da1ebSSage Weil return vxattr; 239355da1ebSSage Weil vxattr++; 24006476a69SAlex Elder } 24106476a69SAlex Elder } 24206476a69SAlex Elder 243355da1ebSSage Weil return NULL; 244355da1ebSSage Weil } 245355da1ebSSage Weil 246355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 247355da1ebSSage Weil const char *name, int name_len, 248355da1ebSSage Weil const char *val, int val_len, 249355da1ebSSage Weil int dirty, 250355da1ebSSage Weil int should_free_name, int should_free_val, 251355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 252355da1ebSSage Weil { 253355da1ebSSage Weil struct rb_node **p; 254355da1ebSSage Weil struct rb_node *parent = NULL; 255355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 256355da1ebSSage Weil int c; 257355da1ebSSage Weil int new = 0; 258355da1ebSSage Weil 259355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 260355da1ebSSage Weil while (*p) { 261355da1ebSSage Weil parent = *p; 262355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 263355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 264355da1ebSSage Weil if (c < 0) 265355da1ebSSage Weil p = &(*p)->rb_left; 266355da1ebSSage Weil else if (c > 0) 267355da1ebSSage Weil p = &(*p)->rb_right; 268355da1ebSSage Weil else { 269355da1ebSSage Weil if (name_len == xattr->name_len) 270355da1ebSSage Weil break; 271355da1ebSSage Weil else if (name_len < xattr->name_len) 272355da1ebSSage Weil p = &(*p)->rb_left; 273355da1ebSSage Weil else 274355da1ebSSage Weil p = &(*p)->rb_right; 275355da1ebSSage Weil } 276355da1ebSSage Weil xattr = NULL; 277355da1ebSSage Weil } 278355da1ebSSage Weil 279355da1ebSSage Weil if (!xattr) { 280355da1ebSSage Weil new = 1; 281355da1ebSSage Weil xattr = *newxattr; 282355da1ebSSage Weil xattr->name = name; 283355da1ebSSage Weil xattr->name_len = name_len; 284355da1ebSSage Weil xattr->should_free_name = should_free_name; 285355da1ebSSage Weil 286355da1ebSSage Weil ci->i_xattrs.count++; 287355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 288355da1ebSSage Weil } else { 289355da1ebSSage Weil kfree(*newxattr); 290355da1ebSSage Weil *newxattr = NULL; 291355da1ebSSage Weil if (xattr->should_free_val) 292355da1ebSSage Weil kfree((void *)xattr->val); 293355da1ebSSage Weil 294355da1ebSSage Weil if (should_free_name) { 295355da1ebSSage Weil kfree((void *)name); 296355da1ebSSage Weil name = xattr->name; 297355da1ebSSage Weil } 298355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 299355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 300355da1ebSSage Weil } 301355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 302355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 303355da1ebSSage Weil if (val) 304355da1ebSSage Weil xattr->val = val; 305355da1ebSSage Weil else 306355da1ebSSage Weil xattr->val = ""; 307355da1ebSSage Weil 308355da1ebSSage Weil xattr->val_len = val_len; 309355da1ebSSage Weil xattr->dirty = dirty; 310355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 311355da1ebSSage Weil 312355da1ebSSage Weil if (new) { 313355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 314355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 315355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 316355da1ebSSage Weil } 317355da1ebSSage Weil 318355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 319355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 320355da1ebSSage Weil 321355da1ebSSage Weil return 0; 322355da1ebSSage Weil } 323355da1ebSSage Weil 324355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 325355da1ebSSage Weil const char *name) 326355da1ebSSage Weil { 327355da1ebSSage Weil struct rb_node **p; 328355da1ebSSage Weil struct rb_node *parent = NULL; 329355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 33017db143fSSage Weil int name_len = strlen(name); 331355da1ebSSage Weil int c; 332355da1ebSSage Weil 333355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 334355da1ebSSage Weil while (*p) { 335355da1ebSSage Weil parent = *p; 336355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 337355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 33817db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 33917db143fSSage Weil c = 1; 340355da1ebSSage Weil if (c < 0) 341355da1ebSSage Weil p = &(*p)->rb_left; 342355da1ebSSage Weil else if (c > 0) 343355da1ebSSage Weil p = &(*p)->rb_right; 344355da1ebSSage Weil else { 345355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 346355da1ebSSage Weil xattr->val_len, xattr->val); 347355da1ebSSage Weil return xattr; 348355da1ebSSage Weil } 349355da1ebSSage Weil } 350355da1ebSSage Weil 351355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 352355da1ebSSage Weil 353355da1ebSSage Weil return NULL; 354355da1ebSSage Weil } 355355da1ebSSage Weil 356355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 357355da1ebSSage Weil { 358355da1ebSSage Weil BUG_ON(!xattr); 359355da1ebSSage Weil 360355da1ebSSage Weil if (xattr->should_free_name) 361355da1ebSSage Weil kfree((void *)xattr->name); 362355da1ebSSage Weil if (xattr->should_free_val) 363355da1ebSSage Weil kfree((void *)xattr->val); 364355da1ebSSage Weil 365355da1ebSSage Weil kfree(xattr); 366355da1ebSSage Weil } 367355da1ebSSage Weil 368355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 369355da1ebSSage Weil struct ceph_inode_xattr *xattr) 370355da1ebSSage Weil { 371355da1ebSSage Weil if (!xattr) 372355da1ebSSage Weil return -EOPNOTSUPP; 373355da1ebSSage Weil 374355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 375355da1ebSSage Weil 376355da1ebSSage Weil if (xattr->should_free_name) 377355da1ebSSage Weil kfree((void *)xattr->name); 378355da1ebSSage Weil if (xattr->should_free_val) 379355da1ebSSage Weil kfree((void *)xattr->val); 380355da1ebSSage Weil 381355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 382355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 383355da1ebSSage Weil ci->i_xattrs.count--; 384355da1ebSSage Weil kfree(xattr); 385355da1ebSSage Weil 386355da1ebSSage Weil return 0; 387355da1ebSSage Weil } 388355da1ebSSage Weil 389355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 390355da1ebSSage Weil const char *name) 391355da1ebSSage Weil { 392355da1ebSSage Weil struct rb_node **p; 393355da1ebSSage Weil struct ceph_inode_xattr *xattr; 394355da1ebSSage Weil int err; 395355da1ebSSage Weil 396355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 397355da1ebSSage Weil xattr = __get_xattr(ci, name); 398355da1ebSSage Weil err = __remove_xattr(ci, xattr); 399355da1ebSSage Weil return err; 400355da1ebSSage Weil } 401355da1ebSSage Weil 402355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 403355da1ebSSage Weil char *dest) 404355da1ebSSage Weil { 405355da1ebSSage Weil struct rb_node *p; 406355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 407355da1ebSSage Weil 408355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 409355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 410355da1ebSSage Weil 411355da1ebSSage Weil while (p) { 412355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 413355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 414355da1ebSSage Weil dest[xattr->name_len] = '\0'; 415355da1ebSSage Weil 416355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 417355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 418355da1ebSSage Weil 419355da1ebSSage Weil dest += xattr->name_len + 1; 420355da1ebSSage Weil p = rb_next(p); 421355da1ebSSage Weil } 422355da1ebSSage Weil 423355da1ebSSage Weil return dest; 424355da1ebSSage Weil } 425355da1ebSSage Weil 426355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 427355da1ebSSage Weil { 428355da1ebSSage Weil struct rb_node *p, *tmp; 429355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 430355da1ebSSage Weil 431355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 432355da1ebSSage Weil 433355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 434355da1ebSSage Weil 435355da1ebSSage Weil while (p) { 436355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 437355da1ebSSage Weil tmp = p; 438355da1ebSSage Weil p = rb_next(tmp); 439355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 440355da1ebSSage Weil xattr->name_len, xattr->name); 441355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 442355da1ebSSage Weil 443355da1ebSSage Weil __free_xattr(xattr); 444355da1ebSSage Weil } 445355da1ebSSage Weil 446355da1ebSSage Weil ci->i_xattrs.names_size = 0; 447355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 448355da1ebSSage Weil ci->i_xattrs.index_version = 0; 449355da1ebSSage Weil ci->i_xattrs.count = 0; 450355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 451355da1ebSSage Weil } 452355da1ebSSage Weil 453355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 454be655596SSage Weil __releases(ci->i_ceph_lock) 455be655596SSage Weil __acquires(ci->i_ceph_lock) 456355da1ebSSage Weil { 457355da1ebSSage Weil u32 namelen; 458355da1ebSSage Weil u32 numattr = 0; 459355da1ebSSage Weil void *p, *end; 460355da1ebSSage Weil u32 len; 461355da1ebSSage Weil const char *name, *val; 462355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 463355da1ebSSage Weil int xattr_version; 464355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 46563ff78b2SSage Weil int err = 0; 466355da1ebSSage Weil int i; 467355da1ebSSage Weil 468355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 469355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 470355da1ebSSage Weil 471355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 472355da1ebSSage Weil return 0; /* already built */ 473355da1ebSSage Weil 474355da1ebSSage Weil __ceph_destroy_xattrs(ci); 475355da1ebSSage Weil 476355da1ebSSage Weil start: 477355da1ebSSage Weil /* updated internal xattr rb tree */ 478355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 479355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 480355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 481355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 482355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 483be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 484355da1ebSSage Weil 485355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 486355da1ebSSage Weil GFP_NOFS); 487355da1ebSSage Weil err = -ENOMEM; 488355da1ebSSage Weil if (!xattrs) 489355da1ebSSage Weil goto bad_lock; 490355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 491355da1ebSSage Weil for (i = 0; i < numattr; i++) { 492355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 493355da1ebSSage Weil GFP_NOFS); 494355da1ebSSage Weil if (!xattrs[i]) 495355da1ebSSage Weil goto bad_lock; 496355da1ebSSage Weil } 497355da1ebSSage Weil 498be655596SSage Weil spin_lock(&ci->i_ceph_lock); 499355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 500355da1ebSSage Weil /* lost a race, retry */ 501355da1ebSSage Weil for (i = 0; i < numattr; i++) 502355da1ebSSage Weil kfree(xattrs[i]); 503355da1ebSSage Weil kfree(xattrs); 50421ec6ffaSAlan Cox xattrs = NULL; 505355da1ebSSage Weil goto start; 506355da1ebSSage Weil } 507355da1ebSSage Weil err = -EIO; 508355da1ebSSage Weil while (numattr--) { 509355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 510355da1ebSSage Weil namelen = len; 511355da1ebSSage Weil name = p; 512355da1ebSSage Weil p += len; 513355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 514355da1ebSSage Weil val = p; 515355da1ebSSage Weil p += len; 516355da1ebSSage Weil 517355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 518355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 519355da1ebSSage Weil 520355da1ebSSage Weil if (err < 0) 521355da1ebSSage Weil goto bad; 522355da1ebSSage Weil } 523355da1ebSSage Weil kfree(xattrs); 524355da1ebSSage Weil } 525355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 526355da1ebSSage Weil ci->i_xattrs.dirty = false; 527355da1ebSSage Weil 528355da1ebSSage Weil return err; 529355da1ebSSage Weil bad_lock: 530be655596SSage Weil spin_lock(&ci->i_ceph_lock); 531355da1ebSSage Weil bad: 532355da1ebSSage Weil if (xattrs) { 533355da1ebSSage Weil for (i = 0; i < numattr; i++) 534355da1ebSSage Weil kfree(xattrs[i]); 535355da1ebSSage Weil kfree(xattrs); 536355da1ebSSage Weil } 537355da1ebSSage Weil ci->i_xattrs.names_size = 0; 538355da1ebSSage Weil return err; 539355da1ebSSage Weil } 540355da1ebSSage Weil 541355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 542355da1ebSSage Weil int val_size) 543355da1ebSSage Weil { 544355da1ebSSage Weil /* 545355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 546355da1ebSSage Weil * 4 bytes per each value 547355da1ebSSage Weil */ 548355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 549355da1ebSSage Weil ci->i_xattrs.names_size + 550355da1ebSSage Weil ci->i_xattrs.vals_size; 551355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 552355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 553355da1ebSSage Weil ci->i_xattrs.vals_size); 554355da1ebSSage Weil 555355da1ebSSage Weil if (name_size) 556355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 557355da1ebSSage Weil 558355da1ebSSage Weil return size; 559355da1ebSSage Weil } 560355da1ebSSage Weil 561355da1ebSSage Weil /* 562355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 563355da1ebSSage Weil * and swap into place. 564355da1ebSSage Weil */ 565355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 566355da1ebSSage Weil { 567355da1ebSSage Weil struct rb_node *p; 568355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 569355da1ebSSage Weil void *dest; 570355da1ebSSage Weil 571355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 572355da1ebSSage Weil if (ci->i_xattrs.dirty) { 573355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 574355da1ebSSage Weil 575355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 576355da1ebSSage Weil 577355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 578355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 579355da1ebSSage Weil 580355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 581355da1ebSSage Weil while (p) { 582355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 583355da1ebSSage Weil 584355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 585355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 586355da1ebSSage Weil dest += xattr->name_len; 587355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 588355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 589355da1ebSSage Weil dest += xattr->val_len; 590355da1ebSSage Weil 591355da1ebSSage Weil p = rb_next(p); 592355da1ebSSage Weil } 593355da1ebSSage Weil 594355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 595355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 596355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 597355da1ebSSage Weil 598b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 599355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 600355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 601355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 602355da1ebSSage Weil ci->i_xattrs.dirty = false; 6034a625be4SSage Weil ci->i_xattrs.version++; 604355da1ebSSage Weil } 605355da1ebSSage Weil } 606355da1ebSSage Weil 607355da1ebSSage Weil ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 608355da1ebSSage Weil size_t size) 609355da1ebSSage Weil { 610355da1ebSSage Weil struct inode *inode = dentry->d_inode; 611355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 612355da1ebSSage Weil int err; 613355da1ebSSage Weil struct ceph_inode_xattr *xattr; 614881a5fa2SAlex Elder struct ceph_vxattr *vxattr = NULL; 615355da1ebSSage Weil 616355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 617355da1ebSSage Weil return -ENODATA; 618355da1ebSSage Weil 619be655596SSage Weil spin_lock(&ci->i_ceph_lock); 620355da1ebSSage Weil dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 621355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 622355da1ebSSage Weil 6230bee82fbSSage Weil /* let's see if a virtual xattr was requested */ 6240bee82fbSSage Weil vxattr = ceph_match_vxattr(inode, name); 6250bee82fbSSage Weil if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { 6260bee82fbSSage Weil err = vxattr->getxattr_cb(ci, value, size); 6270bee82fbSSage Weil goto out; 6280bee82fbSSage Weil } 6290bee82fbSSage Weil 630355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 631355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 632355da1ebSSage Weil goto get_xattr; 633355da1ebSSage Weil } else { 634be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 635355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 636355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 637355da1ebSSage Weil if (err) 638355da1ebSSage Weil return err; 639355da1ebSSage Weil } 640355da1ebSSage Weil 641be655596SSage Weil spin_lock(&ci->i_ceph_lock); 642355da1ebSSage Weil 643355da1ebSSage Weil err = __build_xattrs(inode); 644355da1ebSSage Weil if (err < 0) 645355da1ebSSage Weil goto out; 646355da1ebSSage Weil 647355da1ebSSage Weil get_xattr: 648355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 649355da1ebSSage Weil xattr = __get_xattr(ci, name); 6500bee82fbSSage Weil if (!xattr) 651355da1ebSSage Weil goto out; 652355da1ebSSage Weil 653355da1ebSSage Weil err = -ERANGE; 654355da1ebSSage Weil if (size && size < xattr->val_len) 655355da1ebSSage Weil goto out; 656355da1ebSSage Weil 657355da1ebSSage Weil err = xattr->val_len; 658355da1ebSSage Weil if (size == 0) 659355da1ebSSage Weil goto out; 660355da1ebSSage Weil 661355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 662355da1ebSSage Weil 663355da1ebSSage Weil out: 664be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 665355da1ebSSage Weil return err; 666355da1ebSSage Weil } 667355da1ebSSage Weil 668355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 669355da1ebSSage Weil { 670355da1ebSSage Weil struct inode *inode = dentry->d_inode; 671355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 672881a5fa2SAlex Elder struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); 673355da1ebSSage Weil u32 vir_namelen = 0; 674355da1ebSSage Weil u32 namelen; 675355da1ebSSage Weil int err; 676355da1ebSSage Weil u32 len; 677355da1ebSSage Weil int i; 678355da1ebSSage Weil 679be655596SSage Weil spin_lock(&ci->i_ceph_lock); 680355da1ebSSage Weil dout("listxattr %p ver=%lld index_ver=%lld\n", inode, 681355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 682355da1ebSSage Weil 683355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 684bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 685355da1ebSSage Weil goto list_xattr; 686355da1ebSSage Weil } else { 687be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 688355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 689355da1ebSSage Weil if (err) 690355da1ebSSage Weil return err; 691355da1ebSSage Weil } 692355da1ebSSage Weil 693be655596SSage Weil spin_lock(&ci->i_ceph_lock); 694355da1ebSSage Weil 695355da1ebSSage Weil err = __build_xattrs(inode); 696355da1ebSSage Weil if (err < 0) 697355da1ebSSage Weil goto out; 698355da1ebSSage Weil 699355da1ebSSage Weil list_xattr: 7003ce6cd12SAlex Elder /* 7013ce6cd12SAlex Elder * Start with virtual dir xattr names (if any) (including 7023ce6cd12SAlex Elder * terminating '\0' characters for each). 7033ce6cd12SAlex Elder */ 7043ce6cd12SAlex Elder vir_namelen = ceph_vxattrs_name_size(vxattrs); 7053ce6cd12SAlex Elder 706355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 707b65917ddSSage Weil namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; 708355da1ebSSage Weil err = -ERANGE; 709b65917ddSSage Weil if (size && vir_namelen + namelen > size) 710355da1ebSSage Weil goto out; 711355da1ebSSage Weil 712b65917ddSSage Weil err = namelen + vir_namelen; 713355da1ebSSage Weil if (size == 0) 714355da1ebSSage Weil goto out; 715355da1ebSSage Weil 716355da1ebSSage Weil names = __copy_xattr_names(ci, names); 717355da1ebSSage Weil 718355da1ebSSage Weil /* virtual xattr names, too */ 719b65917ddSSage Weil err = namelen; 720b65917ddSSage Weil if (vxattrs) { 721355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 722b65917ddSSage Weil if (!vxattrs[i].hidden && 723b65917ddSSage Weil !(vxattrs[i].exists_cb && 724b65917ddSSage Weil !vxattrs[i].exists_cb(ci))) { 725355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 726355da1ebSSage Weil names += len + 1; 727b65917ddSSage Weil err += len + 1; 728b65917ddSSage Weil } 729b65917ddSSage Weil } 730355da1ebSSage Weil } 731355da1ebSSage Weil 732355da1ebSSage Weil out: 733be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 734355da1ebSSage Weil return err; 735355da1ebSSage Weil } 736355da1ebSSage Weil 737355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 738355da1ebSSage Weil const char *value, size_t size, int flags) 739355da1ebSSage Weil { 7403d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 741355da1ebSSage Weil struct inode *inode = dentry->d_inode; 742355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 7435f21c96dSSage Weil struct inode *parent_inode; 744355da1ebSSage Weil struct ceph_mds_request *req; 7453d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 746355da1ebSSage Weil int err; 747355da1ebSSage Weil int i, nr_pages; 748355da1ebSSage Weil struct page **pages = NULL; 749355da1ebSSage Weil void *kaddr; 750355da1ebSSage Weil 751355da1ebSSage Weil /* copy value into some pages */ 752355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 753355da1ebSSage Weil if (nr_pages) { 754355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 755355da1ebSSage Weil if (!pages) 756355da1ebSSage Weil return -ENOMEM; 757355da1ebSSage Weil err = -ENOMEM; 758355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 75931459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 760355da1ebSSage Weil if (!pages[i]) { 761355da1ebSSage Weil nr_pages = i; 762355da1ebSSage Weil goto out; 763355da1ebSSage Weil } 764355da1ebSSage Weil kaddr = kmap(pages[i]); 765355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 766355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 767355da1ebSSage Weil } 768355da1ebSSage Weil } 769355da1ebSSage Weil 770355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 771355da1ebSSage Weil 772355da1ebSSage Weil /* do request */ 773355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 774355da1ebSSage Weil USE_AUTH_MDS); 77560d87733SJulia Lawall if (IS_ERR(req)) { 77660d87733SJulia Lawall err = PTR_ERR(req); 77760d87733SJulia Lawall goto out; 77860d87733SJulia Lawall } 77970b666c3SSage Weil req->r_inode = inode; 78070b666c3SSage Weil ihold(inode); 781355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 782355da1ebSSage Weil req->r_num_caps = 1; 783355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 784355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 785355da1ebSSage Weil 786355da1ebSSage Weil req->r_pages = pages; 787355da1ebSSage Weil req->r_num_pages = nr_pages; 788355da1ebSSage Weil req->r_data_len = size; 789355da1ebSSage Weil 790355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 7915f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 792355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 7935f21c96dSSage Weil iput(parent_inode); 794355da1ebSSage Weil ceph_mdsc_put_request(req); 795355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 796355da1ebSSage Weil 797355da1ebSSage Weil out: 798355da1ebSSage Weil if (pages) { 799355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 800355da1ebSSage Weil __free_page(pages[i]); 801355da1ebSSage Weil kfree(pages); 802355da1ebSSage Weil } 803355da1ebSSage Weil return err; 804355da1ebSSage Weil } 805355da1ebSSage Weil 806355da1ebSSage Weil int ceph_setxattr(struct dentry *dentry, const char *name, 807355da1ebSSage Weil const void *value, size_t size, int flags) 808355da1ebSSage Weil { 809355da1ebSSage Weil struct inode *inode = dentry->d_inode; 810881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 811355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 81218fa8b3fSAlex Elder int issued; 813355da1ebSSage Weil int err; 81418fa8b3fSAlex Elder int dirty; 815355da1ebSSage Weil int name_len = strlen(name); 816355da1ebSSage Weil int val_len = size; 817355da1ebSSage Weil char *newname = NULL; 818355da1ebSSage Weil char *newval = NULL; 819355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 820355da1ebSSage Weil int required_blob_size; 821355da1ebSSage Weil 822355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 823355da1ebSSage Weil return -EROFS; 824355da1ebSSage Weil 825355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 826355da1ebSSage Weil return -EOPNOTSUPP; 827355da1ebSSage Weil 82806476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 829355da1ebSSage Weil if (vxattr && vxattr->readonly) 830355da1ebSSage Weil return -EOPNOTSUPP; 831355da1ebSSage Weil 8323adf654dSSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 8333adf654dSSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 8343adf654dSSage Weil goto do_sync_unlocked; 8353adf654dSSage Weil 836355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 837355da1ebSSage Weil err = -ENOMEM; 83861413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 839355da1ebSSage Weil if (!newname) 840355da1ebSSage Weil goto out; 841355da1ebSSage Weil 842355da1ebSSage Weil if (val_len) { 843b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 844355da1ebSSage Weil if (!newval) 845355da1ebSSage Weil goto out; 846355da1ebSSage Weil } 847355da1ebSSage Weil 848355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 849355da1ebSSage Weil if (!xattr) 850355da1ebSSage Weil goto out; 851355da1ebSSage Weil 852be655596SSage Weil spin_lock(&ci->i_ceph_lock); 853355da1ebSSage Weil retry: 854355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 85518fa8b3fSAlex Elder dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 856355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 857355da1ebSSage Weil goto do_sync; 858355da1ebSSage Weil __build_xattrs(inode); 859355da1ebSSage Weil 860355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 861355da1ebSSage Weil 862355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 863355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 86418fa8b3fSAlex Elder struct ceph_buffer *blob; 865355da1ebSSage Weil 866be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 867355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 868b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 869355da1ebSSage Weil if (!blob) 870355da1ebSSage Weil goto out; 871be655596SSage Weil spin_lock(&ci->i_ceph_lock); 872b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 873355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 874355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 875355da1ebSSage Weil goto retry; 876355da1ebSSage Weil } 877355da1ebSSage Weil 878355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 879355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 88018fa8b3fSAlex Elder 881fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 882355da1ebSSage Weil ci->i_xattrs.dirty = true; 883355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 88418fa8b3fSAlex Elder 885be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 886fca65b4aSSage Weil if (dirty) 887fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 888355da1ebSSage Weil return err; 889355da1ebSSage Weil 890355da1ebSSage Weil do_sync: 891be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 8923adf654dSSage Weil do_sync_unlocked: 893355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 894355da1ebSSage Weil out: 895355da1ebSSage Weil kfree(newname); 896355da1ebSSage Weil kfree(newval); 897355da1ebSSage Weil kfree(xattr); 898355da1ebSSage Weil return err; 899355da1ebSSage Weil } 900355da1ebSSage Weil 901355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 902355da1ebSSage Weil { 9033d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 9043d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 905355da1ebSSage Weil struct inode *inode = dentry->d_inode; 9065f21c96dSSage Weil struct inode *parent_inode; 907355da1ebSSage Weil struct ceph_mds_request *req; 908355da1ebSSage Weil int err; 909355da1ebSSage Weil 910355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 911355da1ebSSage Weil USE_AUTH_MDS); 912355da1ebSSage Weil if (IS_ERR(req)) 913355da1ebSSage Weil return PTR_ERR(req); 91470b666c3SSage Weil req->r_inode = inode; 91570b666c3SSage Weil ihold(inode); 916355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 917355da1ebSSage Weil req->r_num_caps = 1; 918355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 919355da1ebSSage Weil 9205f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 921355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 9225f21c96dSSage Weil iput(parent_inode); 923355da1ebSSage Weil ceph_mdsc_put_request(req); 924355da1ebSSage Weil return err; 925355da1ebSSage Weil } 926355da1ebSSage Weil 927355da1ebSSage Weil int ceph_removexattr(struct dentry *dentry, const char *name) 928355da1ebSSage Weil { 929355da1ebSSage Weil struct inode *inode = dentry->d_inode; 930881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 931355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 932355da1ebSSage Weil int issued; 933355da1ebSSage Weil int err; 93483eb26afSAlex Elder int required_blob_size; 935fca65b4aSSage Weil int dirty; 936355da1ebSSage Weil 937355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 938355da1ebSSage Weil return -EROFS; 939355da1ebSSage Weil 940355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 941355da1ebSSage Weil return -EOPNOTSUPP; 942355da1ebSSage Weil 94306476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 944355da1ebSSage Weil if (vxattr && vxattr->readonly) 945355da1ebSSage Weil return -EOPNOTSUPP; 946355da1ebSSage Weil 947d421acb1SSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 948d421acb1SSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 949d421acb1SSage Weil goto do_sync_unlocked; 950d421acb1SSage Weil 95183eb26afSAlex Elder err = -ENOMEM; 952be655596SSage Weil spin_lock(&ci->i_ceph_lock); 95383eb26afSAlex Elder retry: 954355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 955355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 956355da1ebSSage Weil 957355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 958355da1ebSSage Weil goto do_sync; 95918fa8b3fSAlex Elder __build_xattrs(inode); 960355da1ebSSage Weil 96183eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 96283eb26afSAlex Elder 96383eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 96483eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 96583eb26afSAlex Elder struct ceph_buffer *blob; 96683eb26afSAlex Elder 96783eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 96883eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 96983eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 97083eb26afSAlex Elder if (!blob) 97183eb26afSAlex Elder goto out; 97283eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 97383eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 97483eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 97583eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 97683eb26afSAlex Elder goto retry; 97783eb26afSAlex Elder } 97883eb26afSAlex Elder 979355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 98018fa8b3fSAlex Elder 981fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 982355da1ebSSage Weil ci->i_xattrs.dirty = true; 983355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 984be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 985fca65b4aSSage Weil if (dirty) 986fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 987355da1ebSSage Weil return err; 988355da1ebSSage Weil do_sync: 989be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 990d421acb1SSage Weil do_sync_unlocked: 991355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 99283eb26afSAlex Elder out: 993355da1ebSSage Weil return err; 994355da1ebSSage Weil } 995355da1ebSSage Weil 996