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 14*7221fe4cSGuangliang Zhao /* 15*7221fe4cSGuangliang Zhao * List of handlers for synthetic system.* attributes. Other 16*7221fe4cSGuangliang Zhao * attributes are handled directly. 17*7221fe4cSGuangliang Zhao */ 18*7221fe4cSGuangliang Zhao const struct xattr_handler *ceph_xattr_handlers[] = { 19*7221fe4cSGuangliang Zhao #ifdef CONFIG_CEPH_FS_POSIX_ACL 20*7221fe4cSGuangliang Zhao &ceph_xattr_acl_access_handler, 21*7221fe4cSGuangliang Zhao &ceph_xattr_acl_default_handler, 22*7221fe4cSGuangliang Zhao #endif 23*7221fe4cSGuangliang Zhao NULL, 24*7221fe4cSGuangliang Zhao }; 25*7221fe4cSGuangliang Zhao 26355da1ebSSage Weil static bool ceph_is_valid_xattr(const char *name) 27355da1ebSSage Weil { 2822891907SAlex Elder return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || 291a756278SSage Weil !strncmp(name, XATTR_SECURITY_PREFIX, 30355da1ebSSage Weil XATTR_SECURITY_PREFIX_LEN) || 31*7221fe4cSGuangliang Zhao !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) || 32355da1ebSSage Weil !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || 33355da1ebSSage Weil !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 34355da1ebSSage Weil } 35355da1ebSSage Weil 36355da1ebSSage Weil /* 37355da1ebSSage Weil * These define virtual xattrs exposing the recursive directory 38355da1ebSSage Weil * statistics and layout metadata. 39355da1ebSSage Weil */ 40881a5fa2SAlex Elder struct ceph_vxattr { 41355da1ebSSage Weil char *name; 423ce6cd12SAlex Elder size_t name_size; /* strlen(name) + 1 (for '\0') */ 43355da1ebSSage Weil size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, 44355da1ebSSage Weil size_t size); 458860147aSSage Weil bool readonly, hidden; 46f36e4472SSage Weil bool (*exists_cb)(struct ceph_inode_info *ci); 47355da1ebSSage Weil }; 48355da1ebSSage Weil 4932ab0bd7SSage Weil /* layouts */ 5032ab0bd7SSage Weil 5132ab0bd7SSage Weil static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) 5232ab0bd7SSage Weil { 5332ab0bd7SSage Weil size_t s; 5432ab0bd7SSage Weil char *p = (char *)&ci->i_layout; 5532ab0bd7SSage Weil 5632ab0bd7SSage Weil for (s = 0; s < sizeof(ci->i_layout); s++, p++) 5732ab0bd7SSage Weil if (*p) 5832ab0bd7SSage Weil return true; 5932ab0bd7SSage Weil return false; 6032ab0bd7SSage Weil } 6132ab0bd7SSage Weil 6232ab0bd7SSage Weil static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, 6332ab0bd7SSage Weil size_t size) 6432ab0bd7SSage Weil { 6532ab0bd7SSage Weil int ret; 6632ab0bd7SSage Weil struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); 6732ab0bd7SSage Weil struct ceph_osd_client *osdc = &fsc->client->osdc; 6832ab0bd7SSage Weil s64 pool = ceph_file_layout_pg_pool(ci->i_layout); 6932ab0bd7SSage Weil const char *pool_name; 7032ab0bd7SSage Weil 7132ab0bd7SSage Weil dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); 7232ab0bd7SSage Weil down_read(&osdc->map_sem); 7332ab0bd7SSage Weil pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); 7432ab0bd7SSage Weil if (pool_name) 7532ab0bd7SSage Weil ret = snprintf(val, size, 7632ab0bd7SSage Weil "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%s", 7732ab0bd7SSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 7832ab0bd7SSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 7932ab0bd7SSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout), 8032ab0bd7SSage Weil pool_name); 8132ab0bd7SSage Weil else 8232ab0bd7SSage Weil ret = snprintf(val, size, 8332ab0bd7SSage Weil "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld", 8432ab0bd7SSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout), 8532ab0bd7SSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), 8632ab0bd7SSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout), 8732ab0bd7SSage Weil (unsigned long long)pool); 8832ab0bd7SSage Weil 8932ab0bd7SSage Weil up_read(&osdc->map_sem); 9032ab0bd7SSage Weil return ret; 9132ab0bd7SSage Weil } 9232ab0bd7SSage Weil 93695b7119SSage Weil static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci, 94695b7119SSage Weil char *val, size_t size) 95695b7119SSage Weil { 96695b7119SSage Weil return snprintf(val, size, "%lld", 97695b7119SSage Weil (unsigned long long)ceph_file_layout_su(ci->i_layout)); 98695b7119SSage Weil } 99695b7119SSage Weil 100695b7119SSage Weil static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci, 101695b7119SSage Weil char *val, size_t size) 102695b7119SSage Weil { 103695b7119SSage Weil return snprintf(val, size, "%lld", 104695b7119SSage Weil (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout)); 105695b7119SSage Weil } 106695b7119SSage Weil 107695b7119SSage Weil static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci, 108695b7119SSage Weil char *val, size_t size) 109695b7119SSage Weil { 110695b7119SSage Weil return snprintf(val, size, "%lld", 111695b7119SSage Weil (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); 112695b7119SSage Weil } 113695b7119SSage Weil 114695b7119SSage Weil static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci, 115695b7119SSage Weil char *val, size_t size) 116695b7119SSage Weil { 117695b7119SSage Weil int ret; 118695b7119SSage Weil struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); 119695b7119SSage Weil struct ceph_osd_client *osdc = &fsc->client->osdc; 120695b7119SSage Weil s64 pool = ceph_file_layout_pg_pool(ci->i_layout); 121695b7119SSage Weil const char *pool_name; 122695b7119SSage Weil 123695b7119SSage Weil down_read(&osdc->map_sem); 124695b7119SSage Weil pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); 125695b7119SSage Weil if (pool_name) 126695b7119SSage Weil ret = snprintf(val, size, "%s", pool_name); 127695b7119SSage Weil else 128695b7119SSage Weil ret = snprintf(val, size, "%lld", (unsigned long long)pool); 129695b7119SSage Weil up_read(&osdc->map_sem); 130695b7119SSage Weil return ret; 131695b7119SSage Weil } 132695b7119SSage Weil 133355da1ebSSage Weil /* directories */ 134355da1ebSSage Weil 135aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, 136355da1ebSSage Weil size_t size) 137355da1ebSSage Weil { 138355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); 139355da1ebSSage Weil } 140355da1ebSSage Weil 141aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, 142355da1ebSSage Weil size_t size) 143355da1ebSSage Weil { 144355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_files); 145355da1ebSSage Weil } 146355da1ebSSage Weil 147aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, 148355da1ebSSage Weil size_t size) 149355da1ebSSage Weil { 150355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_subdirs); 151355da1ebSSage Weil } 152355da1ebSSage Weil 153aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, 154355da1ebSSage Weil size_t size) 155355da1ebSSage Weil { 156355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); 157355da1ebSSage Weil } 158355da1ebSSage Weil 159aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, 160355da1ebSSage Weil size_t size) 161355da1ebSSage Weil { 162355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rfiles); 163355da1ebSSage Weil } 164355da1ebSSage Weil 165aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, 166355da1ebSSage Weil size_t size) 167355da1ebSSage Weil { 168355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rsubdirs); 169355da1ebSSage Weil } 170355da1ebSSage Weil 171aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, 172355da1ebSSage Weil size_t size) 173355da1ebSSage Weil { 174355da1ebSSage Weil return snprintf(val, size, "%lld", ci->i_rbytes); 175355da1ebSSage Weil } 176355da1ebSSage Weil 177aa4066edSAlex Elder static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, 178355da1ebSSage Weil size_t size) 179355da1ebSSage Weil { 1803489b42aSAlex Elder return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, 181355da1ebSSage Weil (long)ci->i_rctime.tv_nsec); 182355da1ebSSage Weil } 183355da1ebSSage Weil 18432ab0bd7SSage Weil 185eb788084SAlex Elder #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name 186695b7119SSage Weil #define CEPH_XATTR_NAME2(_type, _name, _name2) \ 187695b7119SSage Weil XATTR_CEPH_PREFIX #_type "." #_name "." #_name2 188eb788084SAlex Elder 189eb788084SAlex Elder #define XATTR_NAME_CEPH(_type, _name) \ 190eb788084SAlex Elder { \ 191eb788084SAlex Elder .name = CEPH_XATTR_NAME(_type, _name), \ 1923ce6cd12SAlex Elder .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ 193aa4066edSAlex Elder .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ 194eb788084SAlex Elder .readonly = true, \ 1958860147aSSage Weil .hidden = false, \ 196f36e4472SSage Weil .exists_cb = NULL, \ 197eb788084SAlex Elder } 198695b7119SSage Weil #define XATTR_LAYOUT_FIELD(_type, _name, _field) \ 199695b7119SSage Weil { \ 200695b7119SSage Weil .name = CEPH_XATTR_NAME2(_type, _name, _field), \ 201695b7119SSage Weil .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \ 202695b7119SSage Weil .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \ 203695b7119SSage Weil .readonly = false, \ 204695b7119SSage Weil .hidden = true, \ 205695b7119SSage Weil .exists_cb = ceph_vxattrcb_layout_exists, \ 206695b7119SSage Weil } 207eb788084SAlex Elder 208881a5fa2SAlex Elder static struct ceph_vxattr ceph_dir_vxattrs[] = { 2091f08f2b0SSage Weil { 2101f08f2b0SSage Weil .name = "ceph.dir.layout", 2111f08f2b0SSage Weil .name_size = sizeof("ceph.dir.layout"), 2121f08f2b0SSage Weil .getxattr_cb = ceph_vxattrcb_layout, 2131f08f2b0SSage Weil .readonly = false, 2141f08f2b0SSage Weil .hidden = false, 2151f08f2b0SSage Weil .exists_cb = ceph_vxattrcb_layout_exists, 2161f08f2b0SSage Weil }, 217695b7119SSage Weil XATTR_LAYOUT_FIELD(dir, layout, stripe_unit), 218695b7119SSage Weil XATTR_LAYOUT_FIELD(dir, layout, stripe_count), 219695b7119SSage Weil XATTR_LAYOUT_FIELD(dir, layout, object_size), 220695b7119SSage Weil XATTR_LAYOUT_FIELD(dir, layout, pool), 221eb788084SAlex Elder XATTR_NAME_CEPH(dir, entries), 222eb788084SAlex Elder XATTR_NAME_CEPH(dir, files), 223eb788084SAlex Elder XATTR_NAME_CEPH(dir, subdirs), 224eb788084SAlex Elder XATTR_NAME_CEPH(dir, rentries), 225eb788084SAlex Elder XATTR_NAME_CEPH(dir, rfiles), 226eb788084SAlex Elder XATTR_NAME_CEPH(dir, rsubdirs), 227eb788084SAlex Elder XATTR_NAME_CEPH(dir, rbytes), 228eb788084SAlex Elder XATTR_NAME_CEPH(dir, rctime), 2292c3dd4ffSAlex Elder { .name = NULL, 0 } /* Required table terminator */ 230355da1ebSSage Weil }; 2313ce6cd12SAlex Elder static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ 232355da1ebSSage Weil 233355da1ebSSage Weil /* files */ 234355da1ebSSage Weil 235881a5fa2SAlex Elder static struct ceph_vxattr ceph_file_vxattrs[] = { 23632ab0bd7SSage Weil { 23732ab0bd7SSage Weil .name = "ceph.file.layout", 23832ab0bd7SSage Weil .name_size = sizeof("ceph.file.layout"), 23932ab0bd7SSage Weil .getxattr_cb = ceph_vxattrcb_layout, 24032ab0bd7SSage Weil .readonly = false, 24132ab0bd7SSage Weil .hidden = false, 24232ab0bd7SSage Weil .exists_cb = ceph_vxattrcb_layout_exists, 24332ab0bd7SSage Weil }, 244695b7119SSage Weil XATTR_LAYOUT_FIELD(file, layout, stripe_unit), 245695b7119SSage Weil XATTR_LAYOUT_FIELD(file, layout, stripe_count), 246695b7119SSage Weil XATTR_LAYOUT_FIELD(file, layout, object_size), 247695b7119SSage Weil XATTR_LAYOUT_FIELD(file, layout, pool), 2482c3dd4ffSAlex Elder { .name = NULL, 0 } /* Required table terminator */ 249355da1ebSSage Weil }; 2503ce6cd12SAlex Elder static size_t ceph_file_vxattrs_name_size; /* total size of all names */ 251355da1ebSSage Weil 252881a5fa2SAlex Elder static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) 253355da1ebSSage Weil { 254355da1ebSSage Weil if (S_ISDIR(inode->i_mode)) 255355da1ebSSage Weil return ceph_dir_vxattrs; 256355da1ebSSage Weil else if (S_ISREG(inode->i_mode)) 257355da1ebSSage Weil return ceph_file_vxattrs; 258355da1ebSSage Weil return NULL; 259355da1ebSSage Weil } 260355da1ebSSage Weil 2613ce6cd12SAlex Elder static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) 2623ce6cd12SAlex Elder { 2633ce6cd12SAlex Elder if (vxattrs == ceph_dir_vxattrs) 2643ce6cd12SAlex Elder return ceph_dir_vxattrs_name_size; 2653ce6cd12SAlex Elder if (vxattrs == ceph_file_vxattrs) 2663ce6cd12SAlex Elder return ceph_file_vxattrs_name_size; 2673ce6cd12SAlex Elder BUG(); 2683ce6cd12SAlex Elder 2693ce6cd12SAlex Elder return 0; 2703ce6cd12SAlex Elder } 2713ce6cd12SAlex Elder 2723ce6cd12SAlex Elder /* 2733ce6cd12SAlex Elder * Compute the aggregate size (including terminating '\0') of all 2743ce6cd12SAlex Elder * virtual extended attribute names in the given vxattr table. 2753ce6cd12SAlex Elder */ 2763ce6cd12SAlex Elder static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) 2773ce6cd12SAlex Elder { 2783ce6cd12SAlex Elder struct ceph_vxattr *vxattr; 2793ce6cd12SAlex Elder size_t size = 0; 2803ce6cd12SAlex Elder 2813ce6cd12SAlex Elder for (vxattr = vxattrs; vxattr->name; vxattr++) 2828860147aSSage Weil if (!vxattr->hidden) 2833ce6cd12SAlex Elder size += vxattr->name_size; 2843ce6cd12SAlex Elder 2853ce6cd12SAlex Elder return size; 2863ce6cd12SAlex Elder } 2873ce6cd12SAlex Elder 2883ce6cd12SAlex Elder /* Routines called at initialization and exit time */ 2893ce6cd12SAlex Elder 2903ce6cd12SAlex Elder void __init ceph_xattr_init(void) 2913ce6cd12SAlex Elder { 2923ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); 2933ce6cd12SAlex Elder ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); 2943ce6cd12SAlex Elder } 2953ce6cd12SAlex Elder 2963ce6cd12SAlex Elder void ceph_xattr_exit(void) 2973ce6cd12SAlex Elder { 2983ce6cd12SAlex Elder ceph_dir_vxattrs_name_size = 0; 2993ce6cd12SAlex Elder ceph_file_vxattrs_name_size = 0; 3003ce6cd12SAlex Elder } 3013ce6cd12SAlex Elder 302881a5fa2SAlex Elder static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, 303355da1ebSSage Weil const char *name) 304355da1ebSSage Weil { 305881a5fa2SAlex Elder struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); 30606476a69SAlex Elder 30706476a69SAlex Elder if (vxattr) { 30806476a69SAlex Elder while (vxattr->name) { 30906476a69SAlex Elder if (!strcmp(vxattr->name, name)) 310355da1ebSSage Weil return vxattr; 311355da1ebSSage Weil vxattr++; 31206476a69SAlex Elder } 31306476a69SAlex Elder } 31406476a69SAlex Elder 315355da1ebSSage Weil return NULL; 316355da1ebSSage Weil } 317355da1ebSSage Weil 318355da1ebSSage Weil static int __set_xattr(struct ceph_inode_info *ci, 319355da1ebSSage Weil const char *name, int name_len, 320355da1ebSSage Weil const char *val, int val_len, 321355da1ebSSage Weil int dirty, 322355da1ebSSage Weil int should_free_name, int should_free_val, 323355da1ebSSage Weil struct ceph_inode_xattr **newxattr) 324355da1ebSSage Weil { 325355da1ebSSage Weil struct rb_node **p; 326355da1ebSSage Weil struct rb_node *parent = NULL; 327355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 328355da1ebSSage Weil int c; 329355da1ebSSage Weil int new = 0; 330355da1ebSSage Weil 331355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 332355da1ebSSage Weil while (*p) { 333355da1ebSSage Weil parent = *p; 334355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 335355da1ebSSage Weil c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); 336355da1ebSSage Weil if (c < 0) 337355da1ebSSage Weil p = &(*p)->rb_left; 338355da1ebSSage Weil else if (c > 0) 339355da1ebSSage Weil p = &(*p)->rb_right; 340355da1ebSSage Weil else { 341355da1ebSSage Weil if (name_len == xattr->name_len) 342355da1ebSSage Weil break; 343355da1ebSSage Weil else if (name_len < xattr->name_len) 344355da1ebSSage Weil p = &(*p)->rb_left; 345355da1ebSSage Weil else 346355da1ebSSage Weil p = &(*p)->rb_right; 347355da1ebSSage Weil } 348355da1ebSSage Weil xattr = NULL; 349355da1ebSSage Weil } 350355da1ebSSage Weil 351355da1ebSSage Weil if (!xattr) { 352355da1ebSSage Weil new = 1; 353355da1ebSSage Weil xattr = *newxattr; 354355da1ebSSage Weil xattr->name = name; 355355da1ebSSage Weil xattr->name_len = name_len; 356355da1ebSSage Weil xattr->should_free_name = should_free_name; 357355da1ebSSage Weil 358355da1ebSSage Weil ci->i_xattrs.count++; 359355da1ebSSage Weil dout("__set_xattr count=%d\n", ci->i_xattrs.count); 360355da1ebSSage Weil } else { 361355da1ebSSage Weil kfree(*newxattr); 362355da1ebSSage Weil *newxattr = NULL; 363355da1ebSSage Weil if (xattr->should_free_val) 364355da1ebSSage Weil kfree((void *)xattr->val); 365355da1ebSSage Weil 366355da1ebSSage Weil if (should_free_name) { 367355da1ebSSage Weil kfree((void *)name); 368355da1ebSSage Weil name = xattr->name; 369355da1ebSSage Weil } 370355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 371355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 372355da1ebSSage Weil } 373355da1ebSSage Weil ci->i_xattrs.names_size += name_len; 374355da1ebSSage Weil ci->i_xattrs.vals_size += val_len; 375355da1ebSSage Weil if (val) 376355da1ebSSage Weil xattr->val = val; 377355da1ebSSage Weil else 378355da1ebSSage Weil xattr->val = ""; 379355da1ebSSage Weil 380355da1ebSSage Weil xattr->val_len = val_len; 381355da1ebSSage Weil xattr->dirty = dirty; 382355da1ebSSage Weil xattr->should_free_val = (val && should_free_val); 383355da1ebSSage Weil 384355da1ebSSage Weil if (new) { 385355da1ebSSage Weil rb_link_node(&xattr->node, parent, p); 386355da1ebSSage Weil rb_insert_color(&xattr->node, &ci->i_xattrs.index); 387355da1ebSSage Weil dout("__set_xattr_val p=%p\n", p); 388355da1ebSSage Weil } 389355da1ebSSage Weil 390355da1ebSSage Weil dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", 391355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); 392355da1ebSSage Weil 393355da1ebSSage Weil return 0; 394355da1ebSSage Weil } 395355da1ebSSage Weil 396355da1ebSSage Weil static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, 397355da1ebSSage Weil const char *name) 398355da1ebSSage Weil { 399355da1ebSSage Weil struct rb_node **p; 400355da1ebSSage Weil struct rb_node *parent = NULL; 401355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 40217db143fSSage Weil int name_len = strlen(name); 403355da1ebSSage Weil int c; 404355da1ebSSage Weil 405355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 406355da1ebSSage Weil while (*p) { 407355da1ebSSage Weil parent = *p; 408355da1ebSSage Weil xattr = rb_entry(parent, struct ceph_inode_xattr, node); 409355da1ebSSage Weil c = strncmp(name, xattr->name, xattr->name_len); 41017db143fSSage Weil if (c == 0 && name_len > xattr->name_len) 41117db143fSSage Weil c = 1; 412355da1ebSSage Weil if (c < 0) 413355da1ebSSage Weil p = &(*p)->rb_left; 414355da1ebSSage Weil else if (c > 0) 415355da1ebSSage Weil p = &(*p)->rb_right; 416355da1ebSSage Weil else { 417355da1ebSSage Weil dout("__get_xattr %s: found %.*s\n", name, 418355da1ebSSage Weil xattr->val_len, xattr->val); 419355da1ebSSage Weil return xattr; 420355da1ebSSage Weil } 421355da1ebSSage Weil } 422355da1ebSSage Weil 423355da1ebSSage Weil dout("__get_xattr %s: not found\n", name); 424355da1ebSSage Weil 425355da1ebSSage Weil return NULL; 426355da1ebSSage Weil } 427355da1ebSSage Weil 428355da1ebSSage Weil static void __free_xattr(struct ceph_inode_xattr *xattr) 429355da1ebSSage Weil { 430355da1ebSSage Weil BUG_ON(!xattr); 431355da1ebSSage Weil 432355da1ebSSage Weil if (xattr->should_free_name) 433355da1ebSSage Weil kfree((void *)xattr->name); 434355da1ebSSage Weil if (xattr->should_free_val) 435355da1ebSSage Weil kfree((void *)xattr->val); 436355da1ebSSage Weil 437355da1ebSSage Weil kfree(xattr); 438355da1ebSSage Weil } 439355da1ebSSage Weil 440355da1ebSSage Weil static int __remove_xattr(struct ceph_inode_info *ci, 441355da1ebSSage Weil struct ceph_inode_xattr *xattr) 442355da1ebSSage Weil { 443355da1ebSSage Weil if (!xattr) 444355da1ebSSage Weil return -EOPNOTSUPP; 445355da1ebSSage Weil 446355da1ebSSage Weil rb_erase(&xattr->node, &ci->i_xattrs.index); 447355da1ebSSage Weil 448355da1ebSSage Weil if (xattr->should_free_name) 449355da1ebSSage Weil kfree((void *)xattr->name); 450355da1ebSSage Weil if (xattr->should_free_val) 451355da1ebSSage Weil kfree((void *)xattr->val); 452355da1ebSSage Weil 453355da1ebSSage Weil ci->i_xattrs.names_size -= xattr->name_len; 454355da1ebSSage Weil ci->i_xattrs.vals_size -= xattr->val_len; 455355da1ebSSage Weil ci->i_xattrs.count--; 456355da1ebSSage Weil kfree(xattr); 457355da1ebSSage Weil 458355da1ebSSage Weil return 0; 459355da1ebSSage Weil } 460355da1ebSSage Weil 461355da1ebSSage Weil static int __remove_xattr_by_name(struct ceph_inode_info *ci, 462355da1ebSSage Weil const char *name) 463355da1ebSSage Weil { 464355da1ebSSage Weil struct rb_node **p; 465355da1ebSSage Weil struct ceph_inode_xattr *xattr; 466355da1ebSSage Weil int err; 467355da1ebSSage Weil 468355da1ebSSage Weil p = &ci->i_xattrs.index.rb_node; 469355da1ebSSage Weil xattr = __get_xattr(ci, name); 470355da1ebSSage Weil err = __remove_xattr(ci, xattr); 471355da1ebSSage Weil return err; 472355da1ebSSage Weil } 473355da1ebSSage Weil 474355da1ebSSage Weil static char *__copy_xattr_names(struct ceph_inode_info *ci, 475355da1ebSSage Weil char *dest) 476355da1ebSSage Weil { 477355da1ebSSage Weil struct rb_node *p; 478355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 479355da1ebSSage Weil 480355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 481355da1ebSSage Weil dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); 482355da1ebSSage Weil 483355da1ebSSage Weil while (p) { 484355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 485355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 486355da1ebSSage Weil dest[xattr->name_len] = '\0'; 487355da1ebSSage Weil 488355da1ebSSage Weil dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, 489355da1ebSSage Weil xattr->name_len, ci->i_xattrs.names_size); 490355da1ebSSage Weil 491355da1ebSSage Weil dest += xattr->name_len + 1; 492355da1ebSSage Weil p = rb_next(p); 493355da1ebSSage Weil } 494355da1ebSSage Weil 495355da1ebSSage Weil return dest; 496355da1ebSSage Weil } 497355da1ebSSage Weil 498355da1ebSSage Weil void __ceph_destroy_xattrs(struct ceph_inode_info *ci) 499355da1ebSSage Weil { 500355da1ebSSage Weil struct rb_node *p, *tmp; 501355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 502355da1ebSSage Weil 503355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 504355da1ebSSage Weil 505355da1ebSSage Weil dout("__ceph_destroy_xattrs p=%p\n", p); 506355da1ebSSage Weil 507355da1ebSSage Weil while (p) { 508355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 509355da1ebSSage Weil tmp = p; 510355da1ebSSage Weil p = rb_next(tmp); 511355da1ebSSage Weil dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, 512355da1ebSSage Weil xattr->name_len, xattr->name); 513355da1ebSSage Weil rb_erase(tmp, &ci->i_xattrs.index); 514355da1ebSSage Weil 515355da1ebSSage Weil __free_xattr(xattr); 516355da1ebSSage Weil } 517355da1ebSSage Weil 518355da1ebSSage Weil ci->i_xattrs.names_size = 0; 519355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 520355da1ebSSage Weil ci->i_xattrs.index_version = 0; 521355da1ebSSage Weil ci->i_xattrs.count = 0; 522355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 523355da1ebSSage Weil } 524355da1ebSSage Weil 525355da1ebSSage Weil static int __build_xattrs(struct inode *inode) 526be655596SSage Weil __releases(ci->i_ceph_lock) 527be655596SSage Weil __acquires(ci->i_ceph_lock) 528355da1ebSSage Weil { 529355da1ebSSage Weil u32 namelen; 530355da1ebSSage Weil u32 numattr = 0; 531355da1ebSSage Weil void *p, *end; 532355da1ebSSage Weil u32 len; 533355da1ebSSage Weil const char *name, *val; 534355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 535355da1ebSSage Weil int xattr_version; 536355da1ebSSage Weil struct ceph_inode_xattr **xattrs = NULL; 53763ff78b2SSage Weil int err = 0; 538355da1ebSSage Weil int i; 539355da1ebSSage Weil 540355da1ebSSage Weil dout("__build_xattrs() len=%d\n", 541355da1ebSSage Weil ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); 542355da1ebSSage Weil 543355da1ebSSage Weil if (ci->i_xattrs.index_version >= ci->i_xattrs.version) 544355da1ebSSage Weil return 0; /* already built */ 545355da1ebSSage Weil 546355da1ebSSage Weil __ceph_destroy_xattrs(ci); 547355da1ebSSage Weil 548355da1ebSSage Weil start: 549355da1ebSSage Weil /* updated internal xattr rb tree */ 550355da1ebSSage Weil if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { 551355da1ebSSage Weil p = ci->i_xattrs.blob->vec.iov_base; 552355da1ebSSage Weil end = p + ci->i_xattrs.blob->vec.iov_len; 553355da1ebSSage Weil ceph_decode_32_safe(&p, end, numattr, bad); 554355da1ebSSage Weil xattr_version = ci->i_xattrs.version; 555be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 556355da1ebSSage Weil 557355da1ebSSage Weil xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), 558355da1ebSSage Weil GFP_NOFS); 559355da1ebSSage Weil err = -ENOMEM; 560355da1ebSSage Weil if (!xattrs) 561355da1ebSSage Weil goto bad_lock; 562355da1ebSSage Weil memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); 563355da1ebSSage Weil for (i = 0; i < numattr; i++) { 564355da1ebSSage Weil xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), 565355da1ebSSage Weil GFP_NOFS); 566355da1ebSSage Weil if (!xattrs[i]) 567355da1ebSSage Weil goto bad_lock; 568355da1ebSSage Weil } 569355da1ebSSage Weil 570be655596SSage Weil spin_lock(&ci->i_ceph_lock); 571355da1ebSSage Weil if (ci->i_xattrs.version != xattr_version) { 572355da1ebSSage Weil /* lost a race, retry */ 573355da1ebSSage Weil for (i = 0; i < numattr; i++) 574355da1ebSSage Weil kfree(xattrs[i]); 575355da1ebSSage Weil kfree(xattrs); 57621ec6ffaSAlan Cox xattrs = NULL; 577355da1ebSSage Weil goto start; 578355da1ebSSage Weil } 579355da1ebSSage Weil err = -EIO; 580355da1ebSSage Weil while (numattr--) { 581355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 582355da1ebSSage Weil namelen = len; 583355da1ebSSage Weil name = p; 584355da1ebSSage Weil p += len; 585355da1ebSSage Weil ceph_decode_32_safe(&p, end, len, bad); 586355da1ebSSage Weil val = p; 587355da1ebSSage Weil p += len; 588355da1ebSSage Weil 589355da1ebSSage Weil err = __set_xattr(ci, name, namelen, val, len, 590355da1ebSSage Weil 0, 0, 0, &xattrs[numattr]); 591355da1ebSSage Weil 592355da1ebSSage Weil if (err < 0) 593355da1ebSSage Weil goto bad; 594355da1ebSSage Weil } 595355da1ebSSage Weil kfree(xattrs); 596355da1ebSSage Weil } 597355da1ebSSage Weil ci->i_xattrs.index_version = ci->i_xattrs.version; 598355da1ebSSage Weil ci->i_xattrs.dirty = false; 599355da1ebSSage Weil 600355da1ebSSage Weil return err; 601355da1ebSSage Weil bad_lock: 602be655596SSage Weil spin_lock(&ci->i_ceph_lock); 603355da1ebSSage Weil bad: 604355da1ebSSage Weil if (xattrs) { 605355da1ebSSage Weil for (i = 0; i < numattr; i++) 606355da1ebSSage Weil kfree(xattrs[i]); 607355da1ebSSage Weil kfree(xattrs); 608355da1ebSSage Weil } 609355da1ebSSage Weil ci->i_xattrs.names_size = 0; 610355da1ebSSage Weil return err; 611355da1ebSSage Weil } 612355da1ebSSage Weil 613355da1ebSSage Weil static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, 614355da1ebSSage Weil int val_size) 615355da1ebSSage Weil { 616355da1ebSSage Weil /* 617355da1ebSSage Weil * 4 bytes for the length, and additional 4 bytes per each xattr name, 618355da1ebSSage Weil * 4 bytes per each value 619355da1ebSSage Weil */ 620355da1ebSSage Weil int size = 4 + ci->i_xattrs.count*(4 + 4) + 621355da1ebSSage Weil ci->i_xattrs.names_size + 622355da1ebSSage Weil ci->i_xattrs.vals_size; 623355da1ebSSage Weil dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", 624355da1ebSSage Weil ci->i_xattrs.count, ci->i_xattrs.names_size, 625355da1ebSSage Weil ci->i_xattrs.vals_size); 626355da1ebSSage Weil 627355da1ebSSage Weil if (name_size) 628355da1ebSSage Weil size += 4 + 4 + name_size + val_size; 629355da1ebSSage Weil 630355da1ebSSage Weil return size; 631355da1ebSSage Weil } 632355da1ebSSage Weil 633355da1ebSSage Weil /* 634355da1ebSSage Weil * If there are dirty xattrs, reencode xattrs into the prealloc_blob 635355da1ebSSage Weil * and swap into place. 636355da1ebSSage Weil */ 637355da1ebSSage Weil void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) 638355da1ebSSage Weil { 639355da1ebSSage Weil struct rb_node *p; 640355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 641355da1ebSSage Weil void *dest; 642355da1ebSSage Weil 643355da1ebSSage Weil dout("__build_xattrs_blob %p\n", &ci->vfs_inode); 644355da1ebSSage Weil if (ci->i_xattrs.dirty) { 645355da1ebSSage Weil int need = __get_required_blob_size(ci, 0, 0); 646355da1ebSSage Weil 647355da1ebSSage Weil BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); 648355da1ebSSage Weil 649355da1ebSSage Weil p = rb_first(&ci->i_xattrs.index); 650355da1ebSSage Weil dest = ci->i_xattrs.prealloc_blob->vec.iov_base; 651355da1ebSSage Weil 652355da1ebSSage Weil ceph_encode_32(&dest, ci->i_xattrs.count); 653355da1ebSSage Weil while (p) { 654355da1ebSSage Weil xattr = rb_entry(p, struct ceph_inode_xattr, node); 655355da1ebSSage Weil 656355da1ebSSage Weil ceph_encode_32(&dest, xattr->name_len); 657355da1ebSSage Weil memcpy(dest, xattr->name, xattr->name_len); 658355da1ebSSage Weil dest += xattr->name_len; 659355da1ebSSage Weil ceph_encode_32(&dest, xattr->val_len); 660355da1ebSSage Weil memcpy(dest, xattr->val, xattr->val_len); 661355da1ebSSage Weil dest += xattr->val_len; 662355da1ebSSage Weil 663355da1ebSSage Weil p = rb_next(p); 664355da1ebSSage Weil } 665355da1ebSSage Weil 666355da1ebSSage Weil /* adjust buffer len; it may be larger than we need */ 667355da1ebSSage Weil ci->i_xattrs.prealloc_blob->vec.iov_len = 668355da1ebSSage Weil dest - ci->i_xattrs.prealloc_blob->vec.iov_base; 669355da1ebSSage Weil 670b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 671355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 672355da1ebSSage Weil ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; 673355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 674355da1ebSSage Weil ci->i_xattrs.dirty = false; 6754a625be4SSage Weil ci->i_xattrs.version++; 676355da1ebSSage Weil } 677355da1ebSSage Weil } 678355da1ebSSage Weil 679*7221fe4cSGuangliang Zhao ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value, 680355da1ebSSage Weil size_t size) 681355da1ebSSage Weil { 682355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 683355da1ebSSage Weil int err; 684355da1ebSSage Weil struct ceph_inode_xattr *xattr; 685881a5fa2SAlex Elder struct ceph_vxattr *vxattr = NULL; 686355da1ebSSage Weil 687355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 688355da1ebSSage Weil return -ENODATA; 689355da1ebSSage Weil 6900bee82fbSSage Weil /* let's see if a virtual xattr was requested */ 6910bee82fbSSage Weil vxattr = ceph_match_vxattr(inode, name); 6920bee82fbSSage Weil if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { 6930bee82fbSSage Weil err = vxattr->getxattr_cb(ci, value, size); 694a1dc1937Smajianpeng return err; 6950bee82fbSSage Weil } 6960bee82fbSSage Weil 697a1dc1937Smajianpeng spin_lock(&ci->i_ceph_lock); 698a1dc1937Smajianpeng dout("getxattr %p ver=%lld index_ver=%lld\n", inode, 699a1dc1937Smajianpeng ci->i_xattrs.version, ci->i_xattrs.index_version); 700a1dc1937Smajianpeng 701355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 702355da1ebSSage Weil (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 703355da1ebSSage Weil goto get_xattr; 704355da1ebSSage Weil } else { 705be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 706355da1ebSSage Weil /* get xattrs from mds (if we don't already have them) */ 707355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 708355da1ebSSage Weil if (err) 709355da1ebSSage Weil return err; 710355da1ebSSage Weil } 711355da1ebSSage Weil 712be655596SSage Weil spin_lock(&ci->i_ceph_lock); 713355da1ebSSage Weil 714355da1ebSSage Weil err = __build_xattrs(inode); 715355da1ebSSage Weil if (err < 0) 716355da1ebSSage Weil goto out; 717355da1ebSSage Weil 718355da1ebSSage Weil get_xattr: 719355da1ebSSage Weil err = -ENODATA; /* == ENOATTR */ 720355da1ebSSage Weil xattr = __get_xattr(ci, name); 7210bee82fbSSage Weil if (!xattr) 722355da1ebSSage Weil goto out; 723355da1ebSSage Weil 724355da1ebSSage Weil err = -ERANGE; 725355da1ebSSage Weil if (size && size < xattr->val_len) 726355da1ebSSage Weil goto out; 727355da1ebSSage Weil 728355da1ebSSage Weil err = xattr->val_len; 729355da1ebSSage Weil if (size == 0) 730355da1ebSSage Weil goto out; 731355da1ebSSage Weil 732355da1ebSSage Weil memcpy(value, xattr->val, xattr->val_len); 733355da1ebSSage Weil 734355da1ebSSage Weil out: 735be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 736355da1ebSSage Weil return err; 737355da1ebSSage Weil } 738355da1ebSSage Weil 739*7221fe4cSGuangliang Zhao ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, 740*7221fe4cSGuangliang Zhao size_t size) 741*7221fe4cSGuangliang Zhao { 742*7221fe4cSGuangliang Zhao if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) 743*7221fe4cSGuangliang Zhao return generic_getxattr(dentry, name, value, size); 744*7221fe4cSGuangliang Zhao 745*7221fe4cSGuangliang Zhao return __ceph_getxattr(dentry->d_inode, name, value, size); 746*7221fe4cSGuangliang Zhao } 747*7221fe4cSGuangliang Zhao 748355da1ebSSage Weil ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) 749355da1ebSSage Weil { 750355da1ebSSage Weil struct inode *inode = dentry->d_inode; 751355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 752881a5fa2SAlex Elder struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); 753355da1ebSSage Weil u32 vir_namelen = 0; 754355da1ebSSage Weil u32 namelen; 755355da1ebSSage Weil int err; 756355da1ebSSage Weil u32 len; 757355da1ebSSage Weil int i; 758355da1ebSSage Weil 759be655596SSage Weil spin_lock(&ci->i_ceph_lock); 760355da1ebSSage Weil dout("listxattr %p ver=%lld index_ver=%lld\n", inode, 761355da1ebSSage Weil ci->i_xattrs.version, ci->i_xattrs.index_version); 762355da1ebSSage Weil 763355da1ebSSage Weil if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && 764bddfa3ccSHenry C Chang (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { 765355da1ebSSage Weil goto list_xattr; 766355da1ebSSage Weil } else { 767be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 768355da1ebSSage Weil err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); 769355da1ebSSage Weil if (err) 770355da1ebSSage Weil return err; 771355da1ebSSage Weil } 772355da1ebSSage Weil 773be655596SSage Weil spin_lock(&ci->i_ceph_lock); 774355da1ebSSage Weil 775355da1ebSSage Weil err = __build_xattrs(inode); 776355da1ebSSage Weil if (err < 0) 777355da1ebSSage Weil goto out; 778355da1ebSSage Weil 779355da1ebSSage Weil list_xattr: 7803ce6cd12SAlex Elder /* 7813ce6cd12SAlex Elder * Start with virtual dir xattr names (if any) (including 7823ce6cd12SAlex Elder * terminating '\0' characters for each). 7833ce6cd12SAlex Elder */ 7843ce6cd12SAlex Elder vir_namelen = ceph_vxattrs_name_size(vxattrs); 7853ce6cd12SAlex Elder 786355da1ebSSage Weil /* adding 1 byte per each variable due to the null termination */ 787b65917ddSSage Weil namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; 788355da1ebSSage Weil err = -ERANGE; 789b65917ddSSage Weil if (size && vir_namelen + namelen > size) 790355da1ebSSage Weil goto out; 791355da1ebSSage Weil 792b65917ddSSage Weil err = namelen + vir_namelen; 793355da1ebSSage Weil if (size == 0) 794355da1ebSSage Weil goto out; 795355da1ebSSage Weil 796355da1ebSSage Weil names = __copy_xattr_names(ci, names); 797355da1ebSSage Weil 798355da1ebSSage Weil /* virtual xattr names, too */ 799b65917ddSSage Weil err = namelen; 800b65917ddSSage Weil if (vxattrs) { 801355da1ebSSage Weil for (i = 0; vxattrs[i].name; i++) { 802b65917ddSSage Weil if (!vxattrs[i].hidden && 803b65917ddSSage Weil !(vxattrs[i].exists_cb && 804b65917ddSSage Weil !vxattrs[i].exists_cb(ci))) { 805355da1ebSSage Weil len = sprintf(names, "%s", vxattrs[i].name); 806355da1ebSSage Weil names += len + 1; 807b65917ddSSage Weil err += len + 1; 808b65917ddSSage Weil } 809b65917ddSSage Weil } 810355da1ebSSage Weil } 811355da1ebSSage Weil 812355da1ebSSage Weil out: 813be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 814355da1ebSSage Weil return err; 815355da1ebSSage Weil } 816355da1ebSSage Weil 817355da1ebSSage Weil static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 818355da1ebSSage Weil const char *value, size_t size, int flags) 819355da1ebSSage Weil { 8203d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 821355da1ebSSage Weil struct inode *inode = dentry->d_inode; 822355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 8235f21c96dSSage Weil struct inode *parent_inode; 824355da1ebSSage Weil struct ceph_mds_request *req; 8253d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 826355da1ebSSage Weil int err; 827355da1ebSSage Weil int i, nr_pages; 828355da1ebSSage Weil struct page **pages = NULL; 829355da1ebSSage Weil void *kaddr; 830355da1ebSSage Weil 831355da1ebSSage Weil /* copy value into some pages */ 832355da1ebSSage Weil nr_pages = calc_pages_for(0, size); 833355da1ebSSage Weil if (nr_pages) { 834355da1ebSSage Weil pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); 835355da1ebSSage Weil if (!pages) 836355da1ebSSage Weil return -ENOMEM; 837355da1ebSSage Weil err = -ENOMEM; 838355da1ebSSage Weil for (i = 0; i < nr_pages; i++) { 83931459fe4SYehuda Sadeh pages[i] = __page_cache_alloc(GFP_NOFS); 840355da1ebSSage Weil if (!pages[i]) { 841355da1ebSSage Weil nr_pages = i; 842355da1ebSSage Weil goto out; 843355da1ebSSage Weil } 844355da1ebSSage Weil kaddr = kmap(pages[i]); 845355da1ebSSage Weil memcpy(kaddr, value + i*PAGE_CACHE_SIZE, 846355da1ebSSage Weil min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); 847355da1ebSSage Weil } 848355da1ebSSage Weil } 849355da1ebSSage Weil 850355da1ebSSage Weil dout("setxattr value=%.*s\n", (int)size, value); 851355da1ebSSage Weil 852355da1ebSSage Weil /* do request */ 853355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, 854355da1ebSSage Weil USE_AUTH_MDS); 85560d87733SJulia Lawall if (IS_ERR(req)) { 85660d87733SJulia Lawall err = PTR_ERR(req); 85760d87733SJulia Lawall goto out; 85860d87733SJulia Lawall } 85970b666c3SSage Weil req->r_inode = inode; 86070b666c3SSage Weil ihold(inode); 861355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 862355da1ebSSage Weil req->r_num_caps = 1; 863355da1ebSSage Weil req->r_args.setxattr.flags = cpu_to_le32(flags); 864355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 865355da1ebSSage Weil 866355da1ebSSage Weil req->r_pages = pages; 867355da1ebSSage Weil req->r_num_pages = nr_pages; 868355da1ebSSage Weil req->r_data_len = size; 869355da1ebSSage Weil 870355da1ebSSage Weil dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); 8715f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 872355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 8735f21c96dSSage Weil iput(parent_inode); 874355da1ebSSage Weil ceph_mdsc_put_request(req); 875355da1ebSSage Weil dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); 876355da1ebSSage Weil 877355da1ebSSage Weil out: 878355da1ebSSage Weil if (pages) { 879355da1ebSSage Weil for (i = 0; i < nr_pages; i++) 880355da1ebSSage Weil __free_page(pages[i]); 881355da1ebSSage Weil kfree(pages); 882355da1ebSSage Weil } 883355da1ebSSage Weil return err; 884355da1ebSSage Weil } 885355da1ebSSage Weil 886*7221fe4cSGuangliang Zhao int __ceph_setxattr(struct dentry *dentry, const char *name, 887355da1ebSSage Weil const void *value, size_t size, int flags) 888355da1ebSSage Weil { 889355da1ebSSage Weil struct inode *inode = dentry->d_inode; 890881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 891355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 89218fa8b3fSAlex Elder int issued; 893355da1ebSSage Weil int err; 89418fa8b3fSAlex Elder int dirty; 895355da1ebSSage Weil int name_len = strlen(name); 896355da1ebSSage Weil int val_len = size; 897355da1ebSSage Weil char *newname = NULL; 898355da1ebSSage Weil char *newval = NULL; 899355da1ebSSage Weil struct ceph_inode_xattr *xattr = NULL; 900355da1ebSSage Weil int required_blob_size; 901355da1ebSSage Weil 902355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 903355da1ebSSage Weil return -EOPNOTSUPP; 904355da1ebSSage Weil 90506476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 906355da1ebSSage Weil if (vxattr && vxattr->readonly) 907355da1ebSSage Weil return -EOPNOTSUPP; 908355da1ebSSage Weil 9093adf654dSSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 9103adf654dSSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 9113adf654dSSage Weil goto do_sync_unlocked; 9123adf654dSSage Weil 913355da1ebSSage Weil /* preallocate memory for xattr name, value, index node */ 914355da1ebSSage Weil err = -ENOMEM; 91561413c2fSJulia Lawall newname = kmemdup(name, name_len + 1, GFP_NOFS); 916355da1ebSSage Weil if (!newname) 917355da1ebSSage Weil goto out; 918355da1ebSSage Weil 919355da1ebSSage Weil if (val_len) { 920b829c195SAlex Elder newval = kmemdup(value, val_len, GFP_NOFS); 921355da1ebSSage Weil if (!newval) 922355da1ebSSage Weil goto out; 923355da1ebSSage Weil } 924355da1ebSSage Weil 925355da1ebSSage Weil xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); 926355da1ebSSage Weil if (!xattr) 927355da1ebSSage Weil goto out; 928355da1ebSSage Weil 929be655596SSage Weil spin_lock(&ci->i_ceph_lock); 930355da1ebSSage Weil retry: 931355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 93218fa8b3fSAlex Elder dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); 933355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 934355da1ebSSage Weil goto do_sync; 935355da1ebSSage Weil __build_xattrs(inode); 936355da1ebSSage Weil 937355da1ebSSage Weil required_blob_size = __get_required_blob_size(ci, name_len, val_len); 938355da1ebSSage Weil 939355da1ebSSage Weil if (!ci->i_xattrs.prealloc_blob || 940355da1ebSSage Weil required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 94118fa8b3fSAlex Elder struct ceph_buffer *blob; 942355da1ebSSage Weil 943be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 944355da1ebSSage Weil dout(" preaallocating new blob size=%d\n", required_blob_size); 945b6c1d5b8SSage Weil blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 946355da1ebSSage Weil if (!blob) 947355da1ebSSage Weil goto out; 948be655596SSage Weil spin_lock(&ci->i_ceph_lock); 949b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 950355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 951355da1ebSSage Weil ci->i_xattrs.prealloc_blob = blob; 952355da1ebSSage Weil goto retry; 953355da1ebSSage Weil } 954355da1ebSSage Weil 955355da1ebSSage Weil err = __set_xattr(ci, newname, name_len, newval, 956355da1ebSSage Weil val_len, 1, 1, 1, &xattr); 95718fa8b3fSAlex Elder 958fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 959355da1ebSSage Weil ci->i_xattrs.dirty = true; 960355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 96118fa8b3fSAlex Elder 962be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 963fca65b4aSSage Weil if (dirty) 964fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 965355da1ebSSage Weil return err; 966355da1ebSSage Weil 967355da1ebSSage Weil do_sync: 968be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 9693adf654dSSage Weil do_sync_unlocked: 970355da1ebSSage Weil err = ceph_sync_setxattr(dentry, name, value, size, flags); 971355da1ebSSage Weil out: 972355da1ebSSage Weil kfree(newname); 973355da1ebSSage Weil kfree(newval); 974355da1ebSSage Weil kfree(xattr); 975355da1ebSSage Weil return err; 976355da1ebSSage Weil } 977355da1ebSSage Weil 978*7221fe4cSGuangliang Zhao int ceph_setxattr(struct dentry *dentry, const char *name, 979*7221fe4cSGuangliang Zhao const void *value, size_t size, int flags) 980*7221fe4cSGuangliang Zhao { 981*7221fe4cSGuangliang Zhao if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) 982*7221fe4cSGuangliang Zhao return -EROFS; 983*7221fe4cSGuangliang Zhao 984*7221fe4cSGuangliang Zhao if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) 985*7221fe4cSGuangliang Zhao return generic_setxattr(dentry, name, value, size, flags); 986*7221fe4cSGuangliang Zhao 987*7221fe4cSGuangliang Zhao return __ceph_setxattr(dentry, name, value, size, flags); 988*7221fe4cSGuangliang Zhao } 989*7221fe4cSGuangliang Zhao 990355da1ebSSage Weil static int ceph_send_removexattr(struct dentry *dentry, const char *name) 991355da1ebSSage Weil { 9923d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 9933d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 994355da1ebSSage Weil struct inode *inode = dentry->d_inode; 9955f21c96dSSage Weil struct inode *parent_inode; 996355da1ebSSage Weil struct ceph_mds_request *req; 997355da1ebSSage Weil int err; 998355da1ebSSage Weil 999355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, 1000355da1ebSSage Weil USE_AUTH_MDS); 1001355da1ebSSage Weil if (IS_ERR(req)) 1002355da1ebSSage Weil return PTR_ERR(req); 100370b666c3SSage Weil req->r_inode = inode; 100470b666c3SSage Weil ihold(inode); 1005355da1ebSSage Weil req->r_inode_drop = CEPH_CAP_XATTR_SHARED; 1006355da1ebSSage Weil req->r_num_caps = 1; 1007355da1ebSSage Weil req->r_path2 = kstrdup(name, GFP_NOFS); 1008355da1ebSSage Weil 10095f21c96dSSage Weil parent_inode = ceph_get_dentry_parent_inode(dentry); 1010355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, parent_inode, req); 10115f21c96dSSage Weil iput(parent_inode); 1012355da1ebSSage Weil ceph_mdsc_put_request(req); 1013355da1ebSSage Weil return err; 1014355da1ebSSage Weil } 1015355da1ebSSage Weil 1016*7221fe4cSGuangliang Zhao int __ceph_removexattr(struct dentry *dentry, const char *name) 1017355da1ebSSage Weil { 1018355da1ebSSage Weil struct inode *inode = dentry->d_inode; 1019881a5fa2SAlex Elder struct ceph_vxattr *vxattr; 1020355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1021355da1ebSSage Weil int issued; 1022355da1ebSSage Weil int err; 102383eb26afSAlex Elder int required_blob_size; 1024fca65b4aSSage Weil int dirty; 1025355da1ebSSage Weil 1026355da1ebSSage Weil if (!ceph_is_valid_xattr(name)) 1027355da1ebSSage Weil return -EOPNOTSUPP; 1028355da1ebSSage Weil 102906476a69SAlex Elder vxattr = ceph_match_vxattr(inode, name); 1030355da1ebSSage Weil if (vxattr && vxattr->readonly) 1031355da1ebSSage Weil return -EOPNOTSUPP; 1032355da1ebSSage Weil 1033d421acb1SSage Weil /* pass any unhandled ceph.* xattrs through to the MDS */ 1034d421acb1SSage Weil if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) 1035d421acb1SSage Weil goto do_sync_unlocked; 1036d421acb1SSage Weil 103783eb26afSAlex Elder err = -ENOMEM; 1038be655596SSage Weil spin_lock(&ci->i_ceph_lock); 103983eb26afSAlex Elder retry: 1040355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 1041355da1ebSSage Weil dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); 1042355da1ebSSage Weil 1043355da1ebSSage Weil if (!(issued & CEPH_CAP_XATTR_EXCL)) 1044355da1ebSSage Weil goto do_sync; 104518fa8b3fSAlex Elder __build_xattrs(inode); 1046355da1ebSSage Weil 104783eb26afSAlex Elder required_blob_size = __get_required_blob_size(ci, 0, 0); 104883eb26afSAlex Elder 104983eb26afSAlex Elder if (!ci->i_xattrs.prealloc_blob || 105083eb26afSAlex Elder required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { 105183eb26afSAlex Elder struct ceph_buffer *blob; 105283eb26afSAlex Elder 105383eb26afSAlex Elder spin_unlock(&ci->i_ceph_lock); 105483eb26afSAlex Elder dout(" preaallocating new blob size=%d\n", required_blob_size); 105583eb26afSAlex Elder blob = ceph_buffer_new(required_blob_size, GFP_NOFS); 105683eb26afSAlex Elder if (!blob) 105783eb26afSAlex Elder goto out; 105883eb26afSAlex Elder spin_lock(&ci->i_ceph_lock); 105983eb26afSAlex Elder if (ci->i_xattrs.prealloc_blob) 106083eb26afSAlex Elder ceph_buffer_put(ci->i_xattrs.prealloc_blob); 106183eb26afSAlex Elder ci->i_xattrs.prealloc_blob = blob; 106283eb26afSAlex Elder goto retry; 106383eb26afSAlex Elder } 106483eb26afSAlex Elder 1065355da1ebSSage Weil err = __remove_xattr_by_name(ceph_inode(inode), name); 106618fa8b3fSAlex Elder 1067fca65b4aSSage Weil dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); 1068355da1ebSSage Weil ci->i_xattrs.dirty = true; 1069355da1ebSSage Weil inode->i_ctime = CURRENT_TIME; 1070be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1071fca65b4aSSage Weil if (dirty) 1072fca65b4aSSage Weil __mark_inode_dirty(inode, dirty); 1073355da1ebSSage Weil return err; 1074355da1ebSSage Weil do_sync: 1075be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1076d421acb1SSage Weil do_sync_unlocked: 1077355da1ebSSage Weil err = ceph_send_removexattr(dentry, name); 107883eb26afSAlex Elder out: 1079355da1ebSSage Weil return err; 1080355da1ebSSage Weil } 1081355da1ebSSage Weil 1082*7221fe4cSGuangliang Zhao int ceph_removexattr(struct dentry *dentry, const char *name) 1083*7221fe4cSGuangliang Zhao { 1084*7221fe4cSGuangliang Zhao if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) 1085*7221fe4cSGuangliang Zhao return -EROFS; 1086*7221fe4cSGuangliang Zhao 1087*7221fe4cSGuangliang Zhao if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) 1088*7221fe4cSGuangliang Zhao return generic_removexattr(dentry, name); 1089*7221fe4cSGuangliang Zhao 1090*7221fe4cSGuangliang Zhao return __ceph_removexattr(dentry, name); 1091*7221fe4cSGuangliang Zhao } 1092