13d14c5d2SYehuda Sadeh #include <linux/ceph/ceph_debug.h> 2a8599bd8SSage Weil 3a8599bd8SSage Weil #include <linux/fs.h> 4a8599bd8SSage Weil #include <linux/kernel.h> 5a8599bd8SSage Weil #include <linux/sched.h> 65a0e3ad6STejun Heo #include <linux/slab.h> 7a8599bd8SSage Weil #include <linux/vmalloc.h> 8a8599bd8SSage Weil #include <linux/wait.h> 9f1a3d572SStephen Rothwell #include <linux/writeback.h> 10a8599bd8SSage Weil 11a8599bd8SSage Weil #include "super.h" 123d14c5d2SYehuda Sadeh #include "mds_client.h" 1399ccbd22SMilosz Tanski #include "cache.h" 143d14c5d2SYehuda Sadeh #include <linux/ceph/decode.h> 153d14c5d2SYehuda Sadeh #include <linux/ceph/messenger.h> 16a8599bd8SSage Weil 17a8599bd8SSage Weil /* 18a8599bd8SSage Weil * Capability management 19a8599bd8SSage Weil * 20a8599bd8SSage Weil * The Ceph metadata servers control client access to inode metadata 21a8599bd8SSage Weil * and file data by issuing capabilities, granting clients permission 22a8599bd8SSage Weil * to read and/or write both inode field and file data to OSDs 23a8599bd8SSage Weil * (storage nodes). Each capability consists of a set of bits 24a8599bd8SSage Weil * indicating which operations are allowed. 25a8599bd8SSage Weil * 26a8599bd8SSage Weil * If the client holds a *_SHARED cap, the client has a coherent value 27a8599bd8SSage Weil * that can be safely read from the cached inode. 28a8599bd8SSage Weil * 29a8599bd8SSage Weil * In the case of a *_EXCL (exclusive) or FILE_WR capabilities, the 30a8599bd8SSage Weil * client is allowed to change inode attributes (e.g., file size, 31a8599bd8SSage Weil * mtime), note its dirty state in the ceph_cap, and asynchronously 32a8599bd8SSage Weil * flush that metadata change to the MDS. 33a8599bd8SSage Weil * 34a8599bd8SSage Weil * In the event of a conflicting operation (perhaps by another 35a8599bd8SSage Weil * client), the MDS will revoke the conflicting client capabilities. 36a8599bd8SSage Weil * 37a8599bd8SSage Weil * In order for a client to cache an inode, it must hold a capability 38a8599bd8SSage Weil * with at least one MDS server. When inodes are released, release 39a8599bd8SSage Weil * notifications are batched and periodically sent en masse to the MDS 40a8599bd8SSage Weil * cluster to release server state. 41a8599bd8SSage Weil */ 42a8599bd8SSage Weil 43a8599bd8SSage Weil 44a8599bd8SSage Weil /* 45a8599bd8SSage Weil * Generate readable cap strings for debugging output. 46a8599bd8SSage Weil */ 47a8599bd8SSage Weil #define MAX_CAP_STR 20 48a8599bd8SSage Weil static char cap_str[MAX_CAP_STR][40]; 49a8599bd8SSage Weil static DEFINE_SPINLOCK(cap_str_lock); 50a8599bd8SSage Weil static int last_cap_str; 51a8599bd8SSage Weil 52a8599bd8SSage Weil static char *gcap_string(char *s, int c) 53a8599bd8SSage Weil { 54a8599bd8SSage Weil if (c & CEPH_CAP_GSHARED) 55a8599bd8SSage Weil *s++ = 's'; 56a8599bd8SSage Weil if (c & CEPH_CAP_GEXCL) 57a8599bd8SSage Weil *s++ = 'x'; 58a8599bd8SSage Weil if (c & CEPH_CAP_GCACHE) 59a8599bd8SSage Weil *s++ = 'c'; 60a8599bd8SSage Weil if (c & CEPH_CAP_GRD) 61a8599bd8SSage Weil *s++ = 'r'; 62a8599bd8SSage Weil if (c & CEPH_CAP_GWR) 63a8599bd8SSage Weil *s++ = 'w'; 64a8599bd8SSage Weil if (c & CEPH_CAP_GBUFFER) 65a8599bd8SSage Weil *s++ = 'b'; 66a8599bd8SSage Weil if (c & CEPH_CAP_GLAZYIO) 67a8599bd8SSage Weil *s++ = 'l'; 68a8599bd8SSage Weil return s; 69a8599bd8SSage Weil } 70a8599bd8SSage Weil 71a8599bd8SSage Weil const char *ceph_cap_string(int caps) 72a8599bd8SSage Weil { 73a8599bd8SSage Weil int i; 74a8599bd8SSage Weil char *s; 75a8599bd8SSage Weil int c; 76a8599bd8SSage Weil 77a8599bd8SSage Weil spin_lock(&cap_str_lock); 78a8599bd8SSage Weil i = last_cap_str++; 79a8599bd8SSage Weil if (last_cap_str == MAX_CAP_STR) 80a8599bd8SSage Weil last_cap_str = 0; 81a8599bd8SSage Weil spin_unlock(&cap_str_lock); 82a8599bd8SSage Weil 83a8599bd8SSage Weil s = cap_str[i]; 84a8599bd8SSage Weil 85a8599bd8SSage Weil if (caps & CEPH_CAP_PIN) 86a8599bd8SSage Weil *s++ = 'p'; 87a8599bd8SSage Weil 88a8599bd8SSage Weil c = (caps >> CEPH_CAP_SAUTH) & 3; 89a8599bd8SSage Weil if (c) { 90a8599bd8SSage Weil *s++ = 'A'; 91a8599bd8SSage Weil s = gcap_string(s, c); 92a8599bd8SSage Weil } 93a8599bd8SSage Weil 94a8599bd8SSage Weil c = (caps >> CEPH_CAP_SLINK) & 3; 95a8599bd8SSage Weil if (c) { 96a8599bd8SSage Weil *s++ = 'L'; 97a8599bd8SSage Weil s = gcap_string(s, c); 98a8599bd8SSage Weil } 99a8599bd8SSage Weil 100a8599bd8SSage Weil c = (caps >> CEPH_CAP_SXATTR) & 3; 101a8599bd8SSage Weil if (c) { 102a8599bd8SSage Weil *s++ = 'X'; 103a8599bd8SSage Weil s = gcap_string(s, c); 104a8599bd8SSage Weil } 105a8599bd8SSage Weil 106a8599bd8SSage Weil c = caps >> CEPH_CAP_SFILE; 107a8599bd8SSage Weil if (c) { 108a8599bd8SSage Weil *s++ = 'F'; 109a8599bd8SSage Weil s = gcap_string(s, c); 110a8599bd8SSage Weil } 111a8599bd8SSage Weil 112a8599bd8SSage Weil if (s == cap_str[i]) 113a8599bd8SSage Weil *s++ = '-'; 114a8599bd8SSage Weil *s = 0; 115a8599bd8SSage Weil return cap_str[i]; 116a8599bd8SSage Weil } 117a8599bd8SSage Weil 11837151668SYehuda Sadeh void ceph_caps_init(struct ceph_mds_client *mdsc) 119a8599bd8SSage Weil { 12037151668SYehuda Sadeh INIT_LIST_HEAD(&mdsc->caps_list); 12137151668SYehuda Sadeh spin_lock_init(&mdsc->caps_list_lock); 122a8599bd8SSage Weil } 123a8599bd8SSage Weil 12437151668SYehuda Sadeh void ceph_caps_finalize(struct ceph_mds_client *mdsc) 125a8599bd8SSage Weil { 126a8599bd8SSage Weil struct ceph_cap *cap; 127a8599bd8SSage Weil 12837151668SYehuda Sadeh spin_lock(&mdsc->caps_list_lock); 12937151668SYehuda Sadeh while (!list_empty(&mdsc->caps_list)) { 13037151668SYehuda Sadeh cap = list_first_entry(&mdsc->caps_list, 13137151668SYehuda Sadeh struct ceph_cap, caps_item); 132a8599bd8SSage Weil list_del(&cap->caps_item); 133a8599bd8SSage Weil kmem_cache_free(ceph_cap_cachep, cap); 134a8599bd8SSage Weil } 13537151668SYehuda Sadeh mdsc->caps_total_count = 0; 13637151668SYehuda Sadeh mdsc->caps_avail_count = 0; 13737151668SYehuda Sadeh mdsc->caps_use_count = 0; 13837151668SYehuda Sadeh mdsc->caps_reserve_count = 0; 13937151668SYehuda Sadeh mdsc->caps_min_count = 0; 14037151668SYehuda Sadeh spin_unlock(&mdsc->caps_list_lock); 14185ccce43SSage Weil } 14285ccce43SSage Weil 14337151668SYehuda Sadeh void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta) 14485ccce43SSage Weil { 14537151668SYehuda Sadeh spin_lock(&mdsc->caps_list_lock); 14637151668SYehuda Sadeh mdsc->caps_min_count += delta; 14737151668SYehuda Sadeh BUG_ON(mdsc->caps_min_count < 0); 14837151668SYehuda Sadeh spin_unlock(&mdsc->caps_list_lock); 149a8599bd8SSage Weil } 150a8599bd8SSage Weil 15193faca6eSmajianpeng void ceph_reserve_caps(struct ceph_mds_client *mdsc, 15237151668SYehuda Sadeh struct ceph_cap_reservation *ctx, int need) 153a8599bd8SSage Weil { 154a8599bd8SSage Weil int i; 155a8599bd8SSage Weil struct ceph_cap *cap; 156a8599bd8SSage Weil int have; 157a8599bd8SSage Weil int alloc = 0; 158a8599bd8SSage Weil LIST_HEAD(newcaps); 159a8599bd8SSage Weil 160a8599bd8SSage Weil dout("reserve caps ctx=%p need=%d\n", ctx, need); 161a8599bd8SSage Weil 162a8599bd8SSage Weil /* first reserve any caps that are already allocated */ 16337151668SYehuda Sadeh spin_lock(&mdsc->caps_list_lock); 16437151668SYehuda Sadeh if (mdsc->caps_avail_count >= need) 165a8599bd8SSage Weil have = need; 166a8599bd8SSage Weil else 16737151668SYehuda Sadeh have = mdsc->caps_avail_count; 16837151668SYehuda Sadeh mdsc->caps_avail_count -= have; 16937151668SYehuda Sadeh mdsc->caps_reserve_count += have; 17037151668SYehuda Sadeh BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + 17137151668SYehuda Sadeh mdsc->caps_reserve_count + 17237151668SYehuda Sadeh mdsc->caps_avail_count); 17337151668SYehuda Sadeh spin_unlock(&mdsc->caps_list_lock); 174a8599bd8SSage Weil 175a8599bd8SSage Weil for (i = have; i < need; i++) { 176a8599bd8SSage Weil cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); 17793faca6eSmajianpeng if (!cap) 17893faca6eSmajianpeng break; 179a8599bd8SSage Weil list_add(&cap->caps_item, &newcaps); 180a8599bd8SSage Weil alloc++; 181a8599bd8SSage Weil } 18293faca6eSmajianpeng /* we didn't manage to reserve as much as we needed */ 18393faca6eSmajianpeng if (have + alloc != need) 18493faca6eSmajianpeng pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n", 18593faca6eSmajianpeng ctx, need, have + alloc); 186a8599bd8SSage Weil 18737151668SYehuda Sadeh spin_lock(&mdsc->caps_list_lock); 18837151668SYehuda Sadeh mdsc->caps_total_count += alloc; 18937151668SYehuda Sadeh mdsc->caps_reserve_count += alloc; 19037151668SYehuda Sadeh list_splice(&newcaps, &mdsc->caps_list); 191a8599bd8SSage Weil 19237151668SYehuda Sadeh BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + 19337151668SYehuda Sadeh mdsc->caps_reserve_count + 19437151668SYehuda Sadeh mdsc->caps_avail_count); 19537151668SYehuda Sadeh spin_unlock(&mdsc->caps_list_lock); 196a8599bd8SSage Weil 197a8599bd8SSage Weil ctx->count = need; 198a8599bd8SSage Weil dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n", 19937151668SYehuda Sadeh ctx, mdsc->caps_total_count, mdsc->caps_use_count, 20037151668SYehuda Sadeh mdsc->caps_reserve_count, mdsc->caps_avail_count); 201a8599bd8SSage Weil } 202a8599bd8SSage Weil 20337151668SYehuda Sadeh int ceph_unreserve_caps(struct ceph_mds_client *mdsc, 20437151668SYehuda Sadeh struct ceph_cap_reservation *ctx) 205a8599bd8SSage Weil { 206a8599bd8SSage Weil dout("unreserve caps ctx=%p count=%d\n", ctx, ctx->count); 207a8599bd8SSage Weil if (ctx->count) { 20837151668SYehuda Sadeh spin_lock(&mdsc->caps_list_lock); 20937151668SYehuda Sadeh BUG_ON(mdsc->caps_reserve_count < ctx->count); 21037151668SYehuda Sadeh mdsc->caps_reserve_count -= ctx->count; 21137151668SYehuda Sadeh mdsc->caps_avail_count += ctx->count; 212a8599bd8SSage Weil ctx->count = 0; 213a8599bd8SSage Weil dout("unreserve caps %d = %d used + %d resv + %d avail\n", 21437151668SYehuda Sadeh mdsc->caps_total_count, mdsc->caps_use_count, 21537151668SYehuda Sadeh mdsc->caps_reserve_count, mdsc->caps_avail_count); 21637151668SYehuda Sadeh BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + 21737151668SYehuda Sadeh mdsc->caps_reserve_count + 21837151668SYehuda Sadeh mdsc->caps_avail_count); 21937151668SYehuda Sadeh spin_unlock(&mdsc->caps_list_lock); 220a8599bd8SSage Weil } 221a8599bd8SSage Weil return 0; 222a8599bd8SSage Weil } 223a8599bd8SSage Weil 224d9df2783SYan, Zheng struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 22537151668SYehuda Sadeh struct ceph_cap_reservation *ctx) 226a8599bd8SSage Weil { 227a8599bd8SSage Weil struct ceph_cap *cap = NULL; 228a8599bd8SSage Weil 229a8599bd8SSage Weil /* temporary, until we do something about cap import/export */ 230443b3760SSage Weil if (!ctx) { 231443b3760SSage Weil cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); 232443b3760SSage Weil if (cap) { 2334d1d0534SYan, Zheng spin_lock(&mdsc->caps_list_lock); 23437151668SYehuda Sadeh mdsc->caps_use_count++; 23537151668SYehuda Sadeh mdsc->caps_total_count++; 2364d1d0534SYan, Zheng spin_unlock(&mdsc->caps_list_lock); 237443b3760SSage Weil } 238443b3760SSage Weil return cap; 239443b3760SSage Weil } 240a8599bd8SSage Weil 24137151668SYehuda Sadeh spin_lock(&mdsc->caps_list_lock); 242a8599bd8SSage Weil dout("get_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n", 24337151668SYehuda Sadeh ctx, ctx->count, mdsc->caps_total_count, mdsc->caps_use_count, 24437151668SYehuda Sadeh mdsc->caps_reserve_count, mdsc->caps_avail_count); 245a8599bd8SSage Weil BUG_ON(!ctx->count); 24637151668SYehuda Sadeh BUG_ON(ctx->count > mdsc->caps_reserve_count); 24737151668SYehuda Sadeh BUG_ON(list_empty(&mdsc->caps_list)); 248a8599bd8SSage Weil 249a8599bd8SSage Weil ctx->count--; 25037151668SYehuda Sadeh mdsc->caps_reserve_count--; 25137151668SYehuda Sadeh mdsc->caps_use_count++; 252a8599bd8SSage Weil 25337151668SYehuda Sadeh cap = list_first_entry(&mdsc->caps_list, struct ceph_cap, caps_item); 254a8599bd8SSage Weil list_del(&cap->caps_item); 255a8599bd8SSage Weil 25637151668SYehuda Sadeh BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + 25737151668SYehuda Sadeh mdsc->caps_reserve_count + mdsc->caps_avail_count); 25837151668SYehuda Sadeh spin_unlock(&mdsc->caps_list_lock); 259a8599bd8SSage Weil return cap; 260a8599bd8SSage Weil } 261a8599bd8SSage Weil 26237151668SYehuda Sadeh void ceph_put_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap) 263a8599bd8SSage Weil { 26437151668SYehuda Sadeh spin_lock(&mdsc->caps_list_lock); 2657c1332b8SSage Weil dout("put_cap %p %d = %d used + %d resv + %d avail\n", 26637151668SYehuda Sadeh cap, mdsc->caps_total_count, mdsc->caps_use_count, 26737151668SYehuda Sadeh mdsc->caps_reserve_count, mdsc->caps_avail_count); 26837151668SYehuda Sadeh mdsc->caps_use_count--; 269a8599bd8SSage Weil /* 27085ccce43SSage Weil * Keep some preallocated caps around (ceph_min_count), to 27185ccce43SSage Weil * avoid lots of free/alloc churn. 272a8599bd8SSage Weil */ 27337151668SYehuda Sadeh if (mdsc->caps_avail_count >= mdsc->caps_reserve_count + 27437151668SYehuda Sadeh mdsc->caps_min_count) { 27537151668SYehuda Sadeh mdsc->caps_total_count--; 276a8599bd8SSage Weil kmem_cache_free(ceph_cap_cachep, cap); 277a8599bd8SSage Weil } else { 27837151668SYehuda Sadeh mdsc->caps_avail_count++; 27937151668SYehuda Sadeh list_add(&cap->caps_item, &mdsc->caps_list); 280a8599bd8SSage Weil } 281a8599bd8SSage Weil 28237151668SYehuda Sadeh BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + 28337151668SYehuda Sadeh mdsc->caps_reserve_count + mdsc->caps_avail_count); 28437151668SYehuda Sadeh spin_unlock(&mdsc->caps_list_lock); 285a8599bd8SSage Weil } 286a8599bd8SSage Weil 2873d14c5d2SYehuda Sadeh void ceph_reservation_status(struct ceph_fs_client *fsc, 28885ccce43SSage Weil int *total, int *avail, int *used, int *reserved, 28985ccce43SSage Weil int *min) 290a8599bd8SSage Weil { 2913d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 29237151668SYehuda Sadeh 293a8599bd8SSage Weil if (total) 29437151668SYehuda Sadeh *total = mdsc->caps_total_count; 295a8599bd8SSage Weil if (avail) 29637151668SYehuda Sadeh *avail = mdsc->caps_avail_count; 297a8599bd8SSage Weil if (used) 29837151668SYehuda Sadeh *used = mdsc->caps_use_count; 299a8599bd8SSage Weil if (reserved) 30037151668SYehuda Sadeh *reserved = mdsc->caps_reserve_count; 30185ccce43SSage Weil if (min) 30237151668SYehuda Sadeh *min = mdsc->caps_min_count; 303a8599bd8SSage Weil } 304a8599bd8SSage Weil 305a8599bd8SSage Weil /* 306a8599bd8SSage Weil * Find ceph_cap for given mds, if any. 307a8599bd8SSage Weil * 308be655596SSage Weil * Called with i_ceph_lock held. 309a8599bd8SSage Weil */ 310a8599bd8SSage Weil static struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, int mds) 311a8599bd8SSage Weil { 312a8599bd8SSage Weil struct ceph_cap *cap; 313a8599bd8SSage Weil struct rb_node *n = ci->i_caps.rb_node; 314a8599bd8SSage Weil 315a8599bd8SSage Weil while (n) { 316a8599bd8SSage Weil cap = rb_entry(n, struct ceph_cap, ci_node); 317a8599bd8SSage Weil if (mds < cap->mds) 318a8599bd8SSage Weil n = n->rb_left; 319a8599bd8SSage Weil else if (mds > cap->mds) 320a8599bd8SSage Weil n = n->rb_right; 321a8599bd8SSage Weil else 322a8599bd8SSage Weil return cap; 323a8599bd8SSage Weil } 324a8599bd8SSage Weil return NULL; 325a8599bd8SSage Weil } 326a8599bd8SSage Weil 3272bc50259SGreg Farnum struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, int mds) 3282bc50259SGreg Farnum { 3292bc50259SGreg Farnum struct ceph_cap *cap; 3302bc50259SGreg Farnum 331be655596SSage Weil spin_lock(&ci->i_ceph_lock); 3322bc50259SGreg Farnum cap = __get_cap_for_mds(ci, mds); 333be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 3342bc50259SGreg Farnum return cap; 3352bc50259SGreg Farnum } 3362bc50259SGreg Farnum 337a8599bd8SSage Weil /* 33833caad32SSage Weil * Return id of any MDS with a cap, preferably FILE_WR|BUFFER|EXCL, else -1. 339a8599bd8SSage Weil */ 340ca81f3f6SSage Weil static int __ceph_get_cap_mds(struct ceph_inode_info *ci) 341a8599bd8SSage Weil { 342a8599bd8SSage Weil struct ceph_cap *cap; 343a8599bd8SSage Weil int mds = -1; 344a8599bd8SSage Weil struct rb_node *p; 345a8599bd8SSage Weil 34633caad32SSage Weil /* prefer mds with WR|BUFFER|EXCL caps */ 347a8599bd8SSage Weil for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { 348a8599bd8SSage Weil cap = rb_entry(p, struct ceph_cap, ci_node); 349a8599bd8SSage Weil mds = cap->mds; 350a8599bd8SSage Weil if (cap->issued & (CEPH_CAP_FILE_WR | 351a8599bd8SSage Weil CEPH_CAP_FILE_BUFFER | 352a8599bd8SSage Weil CEPH_CAP_FILE_EXCL)) 353a8599bd8SSage Weil break; 354a8599bd8SSage Weil } 355a8599bd8SSage Weil return mds; 356a8599bd8SSage Weil } 357a8599bd8SSage Weil 358a8599bd8SSage Weil int ceph_get_cap_mds(struct inode *inode) 359a8599bd8SSage Weil { 360be655596SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 361a8599bd8SSage Weil int mds; 362be655596SSage Weil spin_lock(&ci->i_ceph_lock); 363ca81f3f6SSage Weil mds = __ceph_get_cap_mds(ceph_inode(inode)); 364be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 365a8599bd8SSage Weil return mds; 366a8599bd8SSage Weil } 367a8599bd8SSage Weil 368a8599bd8SSage Weil /* 369be655596SSage Weil * Called under i_ceph_lock. 370a8599bd8SSage Weil */ 371a8599bd8SSage Weil static void __insert_cap_node(struct ceph_inode_info *ci, 372a8599bd8SSage Weil struct ceph_cap *new) 373a8599bd8SSage Weil { 374a8599bd8SSage Weil struct rb_node **p = &ci->i_caps.rb_node; 375a8599bd8SSage Weil struct rb_node *parent = NULL; 376a8599bd8SSage Weil struct ceph_cap *cap = NULL; 377a8599bd8SSage Weil 378a8599bd8SSage Weil while (*p) { 379a8599bd8SSage Weil parent = *p; 380a8599bd8SSage Weil cap = rb_entry(parent, struct ceph_cap, ci_node); 381a8599bd8SSage Weil if (new->mds < cap->mds) 382a8599bd8SSage Weil p = &(*p)->rb_left; 383a8599bd8SSage Weil else if (new->mds > cap->mds) 384a8599bd8SSage Weil p = &(*p)->rb_right; 385a8599bd8SSage Weil else 386a8599bd8SSage Weil BUG(); 387a8599bd8SSage Weil } 388a8599bd8SSage Weil 389a8599bd8SSage Weil rb_link_node(&new->ci_node, parent, p); 390a8599bd8SSage Weil rb_insert_color(&new->ci_node, &ci->i_caps); 391a8599bd8SSage Weil } 392a8599bd8SSage Weil 393a8599bd8SSage Weil /* 394a8599bd8SSage Weil * (re)set cap hold timeouts, which control the delayed release 395a8599bd8SSage Weil * of unused caps back to the MDS. Should be called on cap use. 396a8599bd8SSage Weil */ 397a8599bd8SSage Weil static void __cap_set_timeouts(struct ceph_mds_client *mdsc, 398a8599bd8SSage Weil struct ceph_inode_info *ci) 399a8599bd8SSage Weil { 4003d14c5d2SYehuda Sadeh struct ceph_mount_options *ma = mdsc->fsc->mount_options; 401a8599bd8SSage Weil 402a8599bd8SSage Weil ci->i_hold_caps_min = round_jiffies(jiffies + 403a8599bd8SSage Weil ma->caps_wanted_delay_min * HZ); 404a8599bd8SSage Weil ci->i_hold_caps_max = round_jiffies(jiffies + 405a8599bd8SSage Weil ma->caps_wanted_delay_max * HZ); 406a8599bd8SSage Weil dout("__cap_set_timeouts %p min %lu max %lu\n", &ci->vfs_inode, 407a8599bd8SSage Weil ci->i_hold_caps_min - jiffies, ci->i_hold_caps_max - jiffies); 408a8599bd8SSage Weil } 409a8599bd8SSage Weil 410a8599bd8SSage Weil /* 411a8599bd8SSage Weil * (Re)queue cap at the end of the delayed cap release list. 412a8599bd8SSage Weil * 413a8599bd8SSage Weil * If I_FLUSH is set, leave the inode at the front of the list. 414a8599bd8SSage Weil * 415be655596SSage Weil * Caller holds i_ceph_lock 416a8599bd8SSage Weil * -> we take mdsc->cap_delay_lock 417a8599bd8SSage Weil */ 418a8599bd8SSage Weil static void __cap_delay_requeue(struct ceph_mds_client *mdsc, 419a8599bd8SSage Weil struct ceph_inode_info *ci) 420a8599bd8SSage Weil { 421a8599bd8SSage Weil __cap_set_timeouts(mdsc, ci); 422a8599bd8SSage Weil dout("__cap_delay_requeue %p flags %d at %lu\n", &ci->vfs_inode, 423a8599bd8SSage Weil ci->i_ceph_flags, ci->i_hold_caps_max); 424a8599bd8SSage Weil if (!mdsc->stopping) { 425a8599bd8SSage Weil spin_lock(&mdsc->cap_delay_lock); 426a8599bd8SSage Weil if (!list_empty(&ci->i_cap_delay_list)) { 427a8599bd8SSage Weil if (ci->i_ceph_flags & CEPH_I_FLUSH) 428a8599bd8SSage Weil goto no_change; 429a8599bd8SSage Weil list_del_init(&ci->i_cap_delay_list); 430a8599bd8SSage Weil } 431a8599bd8SSage Weil list_add_tail(&ci->i_cap_delay_list, &mdsc->cap_delay_list); 432a8599bd8SSage Weil no_change: 433a8599bd8SSage Weil spin_unlock(&mdsc->cap_delay_lock); 434a8599bd8SSage Weil } 435a8599bd8SSage Weil } 436a8599bd8SSage Weil 437a8599bd8SSage Weil /* 438a8599bd8SSage Weil * Queue an inode for immediate writeback. Mark inode with I_FLUSH, 439a8599bd8SSage Weil * indicating we should send a cap message to flush dirty metadata 440a8599bd8SSage Weil * asap, and move to the front of the delayed cap list. 441a8599bd8SSage Weil */ 442a8599bd8SSage Weil static void __cap_delay_requeue_front(struct ceph_mds_client *mdsc, 443a8599bd8SSage Weil struct ceph_inode_info *ci) 444a8599bd8SSage Weil { 445a8599bd8SSage Weil dout("__cap_delay_requeue_front %p\n", &ci->vfs_inode); 446a8599bd8SSage Weil spin_lock(&mdsc->cap_delay_lock); 447a8599bd8SSage Weil ci->i_ceph_flags |= CEPH_I_FLUSH; 448a8599bd8SSage Weil if (!list_empty(&ci->i_cap_delay_list)) 449a8599bd8SSage Weil list_del_init(&ci->i_cap_delay_list); 450a8599bd8SSage Weil list_add(&ci->i_cap_delay_list, &mdsc->cap_delay_list); 451a8599bd8SSage Weil spin_unlock(&mdsc->cap_delay_lock); 452a8599bd8SSage Weil } 453a8599bd8SSage Weil 454a8599bd8SSage Weil /* 455a8599bd8SSage Weil * Cancel delayed work on cap. 456a8599bd8SSage Weil * 457be655596SSage Weil * Caller must hold i_ceph_lock. 458a8599bd8SSage Weil */ 459a8599bd8SSage Weil static void __cap_delay_cancel(struct ceph_mds_client *mdsc, 460a8599bd8SSage Weil struct ceph_inode_info *ci) 461a8599bd8SSage Weil { 462a8599bd8SSage Weil dout("__cap_delay_cancel %p\n", &ci->vfs_inode); 463a8599bd8SSage Weil if (list_empty(&ci->i_cap_delay_list)) 464a8599bd8SSage Weil return; 465a8599bd8SSage Weil spin_lock(&mdsc->cap_delay_lock); 466a8599bd8SSage Weil list_del_init(&ci->i_cap_delay_list); 467a8599bd8SSage Weil spin_unlock(&mdsc->cap_delay_lock); 468a8599bd8SSage Weil } 469a8599bd8SSage Weil 470a8599bd8SSage Weil /* 471a8599bd8SSage Weil * Common issue checks for add_cap, handle_cap_grant. 472a8599bd8SSage Weil */ 473a8599bd8SSage Weil static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap, 474a8599bd8SSage Weil unsigned issued) 475a8599bd8SSage Weil { 476a8599bd8SSage Weil unsigned had = __ceph_caps_issued(ci, NULL); 477a8599bd8SSage Weil 478a8599bd8SSage Weil /* 479a8599bd8SSage Weil * Each time we receive FILE_CACHE anew, we increment 480a8599bd8SSage Weil * i_rdcache_gen. 481a8599bd8SSage Weil */ 4822962507cSSage Weil if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) && 48399ccbd22SMilosz Tanski (had & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0) { 484a8599bd8SSage Weil ci->i_rdcache_gen++; 48599ccbd22SMilosz Tanski } 486a8599bd8SSage Weil 487a8599bd8SSage Weil /* 4882f276c51SYan, Zheng * if we are newly issued FILE_SHARED, mark dir not complete; we 489a8599bd8SSage Weil * don't know what happened to this directory while we didn't 490a8599bd8SSage Weil * have the cap. 491a8599bd8SSage Weil */ 492a8599bd8SSage Weil if ((issued & CEPH_CAP_FILE_SHARED) && 493a8599bd8SSage Weil (had & CEPH_CAP_FILE_SHARED) == 0) { 494a8599bd8SSage Weil ci->i_shared_gen++; 495a8673d61SYan, Zheng if (S_ISDIR(ci->vfs_inode.i_mode)) { 496a8673d61SYan, Zheng dout(" marking %p NOT complete\n", &ci->vfs_inode); 4972f276c51SYan, Zheng __ceph_dir_clear_complete(ci); 498a8673d61SYan, Zheng } 499a8599bd8SSage Weil } 500a8599bd8SSage Weil } 501a8599bd8SSage Weil 502a8599bd8SSage Weil /* 503a8599bd8SSage Weil * Add a capability under the given MDS session. 504a8599bd8SSage Weil * 505a8599bd8SSage Weil * Caller should hold session snap_rwsem (read) and s_mutex. 506a8599bd8SSage Weil * 507a8599bd8SSage Weil * @fmode is the open file mode, if we are opening a file, otherwise 508a8599bd8SSage Weil * it is < 0. (This is so we can atomically add the cap and add an 509a8599bd8SSage Weil * open file reference to it.) 510a8599bd8SSage Weil */ 511d9df2783SYan, Zheng void ceph_add_cap(struct inode *inode, 512a8599bd8SSage Weil struct ceph_mds_session *session, u64 cap_id, 513a8599bd8SSage Weil int fmode, unsigned issued, unsigned wanted, 514a8599bd8SSage Weil unsigned seq, unsigned mseq, u64 realmino, int flags, 515d9df2783SYan, Zheng struct ceph_cap **new_cap) 516a8599bd8SSage Weil { 5173d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; 518a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 519a8599bd8SSage Weil struct ceph_cap *cap; 520a8599bd8SSage Weil int mds = session->s_mds; 521a8599bd8SSage Weil int actual_wanted; 522a8599bd8SSage Weil 523a8599bd8SSage Weil dout("add_cap %p mds%d cap %llx %s seq %d\n", inode, 524a8599bd8SSage Weil session->s_mds, cap_id, ceph_cap_string(issued), seq); 525a8599bd8SSage Weil 526a8599bd8SSage Weil /* 527a8599bd8SSage Weil * If we are opening the file, include file mode wanted bits 528a8599bd8SSage Weil * in wanted. 529a8599bd8SSage Weil */ 530a8599bd8SSage Weil if (fmode >= 0) 531a8599bd8SSage Weil wanted |= ceph_caps_for_mode(fmode); 532a8599bd8SSage Weil 533a8599bd8SSage Weil cap = __get_cap_for_mds(ci, mds); 534a8599bd8SSage Weil if (!cap) { 535d9df2783SYan, Zheng cap = *new_cap; 536d9df2783SYan, Zheng *new_cap = NULL; 537a8599bd8SSage Weil 538a8599bd8SSage Weil cap->issued = 0; 539a8599bd8SSage Weil cap->implemented = 0; 540a8599bd8SSage Weil cap->mds = mds; 541a8599bd8SSage Weil cap->mds_wanted = 0; 542964266ccSYan, Zheng cap->mseq = 0; 543a8599bd8SSage Weil 544a8599bd8SSage Weil cap->ci = ci; 545a8599bd8SSage Weil __insert_cap_node(ci, cap); 546a8599bd8SSage Weil 547a8599bd8SSage Weil /* add to session cap list */ 548a8599bd8SSage Weil cap->session = session; 549a8599bd8SSage Weil spin_lock(&session->s_cap_lock); 550a8599bd8SSage Weil list_add_tail(&cap->session_caps, &session->s_caps); 551a8599bd8SSage Weil session->s_nr_caps++; 552a8599bd8SSage Weil spin_unlock(&session->s_cap_lock); 55311df2dfbSYan, Zheng } else { 55411df2dfbSYan, Zheng /* 55511df2dfbSYan, Zheng * auth mds of the inode changed. we received the cap export 55611df2dfbSYan, Zheng * message, but still haven't received the cap import message. 55711df2dfbSYan, Zheng * handle_cap_export() updated the new auth MDS' cap. 55811df2dfbSYan, Zheng * 55911df2dfbSYan, Zheng * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing 56011df2dfbSYan, Zheng * a message that was send before the cap import message. So 56111df2dfbSYan, Zheng * don't remove caps. 56211df2dfbSYan, Zheng */ 56311df2dfbSYan, Zheng if (ceph_seq_cmp(seq, cap->seq) <= 0) { 56411df2dfbSYan, Zheng WARN_ON(cap != ci->i_auth_cap); 56511df2dfbSYan, Zheng WARN_ON(cap->cap_id != cap_id); 56611df2dfbSYan, Zheng seq = cap->seq; 56711df2dfbSYan, Zheng mseq = cap->mseq; 56811df2dfbSYan, Zheng issued |= cap->issued; 56911df2dfbSYan, Zheng flags |= CEPH_CAP_FLAG_AUTH; 57011df2dfbSYan, Zheng } 57111df2dfbSYan, Zheng } 57211df2dfbSYan, Zheng 573a8599bd8SSage Weil if (!ci->i_snap_realm) { 574a8599bd8SSage Weil /* 575a8599bd8SSage Weil * add this inode to the appropriate snap realm 576a8599bd8SSage Weil */ 577a8599bd8SSage Weil struct ceph_snap_realm *realm = ceph_lookup_snap_realm(mdsc, 578a8599bd8SSage Weil realmino); 579a8599bd8SSage Weil if (realm) { 580a8599bd8SSage Weil ceph_get_snap_realm(mdsc, realm); 581a8599bd8SSage Weil spin_lock(&realm->inodes_with_caps_lock); 582a8599bd8SSage Weil ci->i_snap_realm = realm; 583a8599bd8SSage Weil list_add(&ci->i_snap_realm_item, 584a8599bd8SSage Weil &realm->inodes_with_caps); 585a8599bd8SSage Weil spin_unlock(&realm->inodes_with_caps_lock); 586a8599bd8SSage Weil } else { 587a8599bd8SSage Weil pr_err("ceph_add_cap: couldn't find snap realm %llx\n", 588a8599bd8SSage Weil realmino); 589b8cd07e7SSage Weil WARN_ON(!realm); 590a8599bd8SSage Weil } 591a8599bd8SSage Weil } 592a8599bd8SSage Weil 593a8599bd8SSage Weil __check_cap_issue(ci, cap, issued); 594a8599bd8SSage Weil 595a8599bd8SSage Weil /* 596a8599bd8SSage Weil * If we are issued caps we don't want, or the mds' wanted 597a8599bd8SSage Weil * value appears to be off, queue a check so we'll release 598a8599bd8SSage Weil * later and/or update the mds wanted value. 599a8599bd8SSage Weil */ 600a8599bd8SSage Weil actual_wanted = __ceph_caps_wanted(ci); 601a8599bd8SSage Weil if ((wanted & ~actual_wanted) || 602a8599bd8SSage Weil (issued & ~actual_wanted & CEPH_CAP_ANY_WR)) { 603a8599bd8SSage Weil dout(" issued %s, mds wanted %s, actual %s, queueing\n", 604a8599bd8SSage Weil ceph_cap_string(issued), ceph_cap_string(wanted), 605a8599bd8SSage Weil ceph_cap_string(actual_wanted)); 606a8599bd8SSage Weil __cap_delay_requeue(mdsc, ci); 607a8599bd8SSage Weil } 608a8599bd8SSage Weil 609b8c2f3aeSYan, Zheng if (flags & CEPH_CAP_FLAG_AUTH) { 610b8c2f3aeSYan, Zheng if (ci->i_auth_cap == NULL || 611d9ffc4f7SYan, Zheng ceph_seq_cmp(ci->i_auth_cap->mseq, mseq) < 0) { 612a8599bd8SSage Weil ci->i_auth_cap = cap; 613d9ffc4f7SYan, Zheng cap->mds_wanted = wanted; 614d9ffc4f7SYan, Zheng } 61511df2dfbSYan, Zheng } else { 61611df2dfbSYan, Zheng WARN_ON(ci->i_auth_cap == cap); 6178a92a119SYan, Zheng } 618a8599bd8SSage Weil 619a8599bd8SSage Weil dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n", 620a8599bd8SSage Weil inode, ceph_vinop(inode), cap, ceph_cap_string(issued), 621a8599bd8SSage Weil ceph_cap_string(issued|cap->issued), seq, mds); 622a8599bd8SSage Weil cap->cap_id = cap_id; 623a8599bd8SSage Weil cap->issued = issued; 624a8599bd8SSage Weil cap->implemented |= issued; 625d1b87809SYan, Zheng if (ceph_seq_cmp(mseq, cap->mseq) > 0) 626964266ccSYan, Zheng cap->mds_wanted = wanted; 627964266ccSYan, Zheng else 628a8599bd8SSage Weil cap->mds_wanted |= wanted; 629a8599bd8SSage Weil cap->seq = seq; 630a8599bd8SSage Weil cap->issue_seq = seq; 631a8599bd8SSage Weil cap->mseq = mseq; 632685f9a5dSSage Weil cap->cap_gen = session->s_cap_gen; 633a8599bd8SSage Weil 634a8599bd8SSage Weil if (fmode >= 0) 635a8599bd8SSage Weil __ceph_get_fmode(ci, fmode); 636a8599bd8SSage Weil } 637a8599bd8SSage Weil 638a8599bd8SSage Weil /* 639a8599bd8SSage Weil * Return true if cap has not timed out and belongs to the current 640a8599bd8SSage Weil * generation of the MDS session (i.e. has not gone 'stale' due to 641a8599bd8SSage Weil * us losing touch with the mds). 642a8599bd8SSage Weil */ 643a8599bd8SSage Weil static int __cap_is_valid(struct ceph_cap *cap) 644a8599bd8SSage Weil { 645a8599bd8SSage Weil unsigned long ttl; 646cdac8303SSage Weil u32 gen; 647a8599bd8SSage Weil 648d8fb02abSAlex Elder spin_lock(&cap->session->s_gen_ttl_lock); 649a8599bd8SSage Weil gen = cap->session->s_cap_gen; 650a8599bd8SSage Weil ttl = cap->session->s_cap_ttl; 651d8fb02abSAlex Elder spin_unlock(&cap->session->s_gen_ttl_lock); 652a8599bd8SSage Weil 653685f9a5dSSage Weil if (cap->cap_gen < gen || time_after_eq(jiffies, ttl)) { 654a8599bd8SSage Weil dout("__cap_is_valid %p cap %p issued %s " 655a8599bd8SSage Weil "but STALE (gen %u vs %u)\n", &cap->ci->vfs_inode, 656685f9a5dSSage Weil cap, ceph_cap_string(cap->issued), cap->cap_gen, gen); 657a8599bd8SSage Weil return 0; 658a8599bd8SSage Weil } 659a8599bd8SSage Weil 660a8599bd8SSage Weil return 1; 661a8599bd8SSage Weil } 662a8599bd8SSage Weil 663a8599bd8SSage Weil /* 664a8599bd8SSage Weil * Return set of valid cap bits issued to us. Note that caps time 665a8599bd8SSage Weil * out, and may be invalidated in bulk if the client session times out 666a8599bd8SSage Weil * and session->s_cap_gen is bumped. 667a8599bd8SSage Weil */ 668a8599bd8SSage Weil int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented) 669a8599bd8SSage Weil { 670d9df2783SYan, Zheng int have = ci->i_snap_caps; 671a8599bd8SSage Weil struct ceph_cap *cap; 672a8599bd8SSage Weil struct rb_node *p; 673a8599bd8SSage Weil 674a8599bd8SSage Weil if (implemented) 675a8599bd8SSage Weil *implemented = 0; 676a8599bd8SSage Weil for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { 677a8599bd8SSage Weil cap = rb_entry(p, struct ceph_cap, ci_node); 678a8599bd8SSage Weil if (!__cap_is_valid(cap)) 679a8599bd8SSage Weil continue; 680a8599bd8SSage Weil dout("__ceph_caps_issued %p cap %p issued %s\n", 681a8599bd8SSage Weil &ci->vfs_inode, cap, ceph_cap_string(cap->issued)); 682a8599bd8SSage Weil have |= cap->issued; 683a8599bd8SSage Weil if (implemented) 684a8599bd8SSage Weil *implemented |= cap->implemented; 685a8599bd8SSage Weil } 686b1530f57SYan, Zheng /* 687b1530f57SYan, Zheng * exclude caps issued by non-auth MDS, but are been revoking 688b1530f57SYan, Zheng * by the auth MDS. The non-auth MDS should be revoking/exporting 689b1530f57SYan, Zheng * these caps, but the message is delayed. 690b1530f57SYan, Zheng */ 691b1530f57SYan, Zheng if (ci->i_auth_cap) { 692b1530f57SYan, Zheng cap = ci->i_auth_cap; 693b1530f57SYan, Zheng have &= ~cap->implemented | cap->issued; 694b1530f57SYan, Zheng } 695a8599bd8SSage Weil return have; 696a8599bd8SSage Weil } 697a8599bd8SSage Weil 698a8599bd8SSage Weil /* 699a8599bd8SSage Weil * Get cap bits issued by caps other than @ocap 700a8599bd8SSage Weil */ 701a8599bd8SSage Weil int __ceph_caps_issued_other(struct ceph_inode_info *ci, struct ceph_cap *ocap) 702a8599bd8SSage Weil { 703a8599bd8SSage Weil int have = ci->i_snap_caps; 704a8599bd8SSage Weil struct ceph_cap *cap; 705a8599bd8SSage Weil struct rb_node *p; 706a8599bd8SSage Weil 707a8599bd8SSage Weil for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { 708a8599bd8SSage Weil cap = rb_entry(p, struct ceph_cap, ci_node); 709a8599bd8SSage Weil if (cap == ocap) 710a8599bd8SSage Weil continue; 711a8599bd8SSage Weil if (!__cap_is_valid(cap)) 712a8599bd8SSage Weil continue; 713a8599bd8SSage Weil have |= cap->issued; 714a8599bd8SSage Weil } 715a8599bd8SSage Weil return have; 716a8599bd8SSage Weil } 717a8599bd8SSage Weil 718a8599bd8SSage Weil /* 719a8599bd8SSage Weil * Move a cap to the end of the LRU (oldest caps at list head, newest 720a8599bd8SSage Weil * at list tail). 721a8599bd8SSage Weil */ 722a8599bd8SSage Weil static void __touch_cap(struct ceph_cap *cap) 723a8599bd8SSage Weil { 724a8599bd8SSage Weil struct ceph_mds_session *s = cap->session; 725a8599bd8SSage Weil 7265dacf091SSage Weil spin_lock(&s->s_cap_lock); 7277c1332b8SSage Weil if (s->s_cap_iterator == NULL) { 728a8599bd8SSage Weil dout("__touch_cap %p cap %p mds%d\n", &cap->ci->vfs_inode, cap, 729a8599bd8SSage Weil s->s_mds); 730a8599bd8SSage Weil list_move_tail(&cap->session_caps, &s->s_caps); 7315dacf091SSage Weil } else { 7325dacf091SSage Weil dout("__touch_cap %p cap %p mds%d NOP, iterating over caps\n", 7335dacf091SSage Weil &cap->ci->vfs_inode, cap, s->s_mds); 7345dacf091SSage Weil } 735a8599bd8SSage Weil spin_unlock(&s->s_cap_lock); 736a8599bd8SSage Weil } 737a8599bd8SSage Weil 738a8599bd8SSage Weil /* 739a8599bd8SSage Weil * Check if we hold the given mask. If so, move the cap(s) to the 740a8599bd8SSage Weil * front of their respective LRUs. (This is the preferred way for 741a8599bd8SSage Weil * callers to check for caps they want.) 742a8599bd8SSage Weil */ 743a8599bd8SSage Weil int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch) 744a8599bd8SSage Weil { 745a8599bd8SSage Weil struct ceph_cap *cap; 746a8599bd8SSage Weil struct rb_node *p; 747a8599bd8SSage Weil int have = ci->i_snap_caps; 748a8599bd8SSage Weil 749a8599bd8SSage Weil if ((have & mask) == mask) { 750a8599bd8SSage Weil dout("__ceph_caps_issued_mask %p snap issued %s" 751a8599bd8SSage Weil " (mask %s)\n", &ci->vfs_inode, 752a8599bd8SSage Weil ceph_cap_string(have), 753a8599bd8SSage Weil ceph_cap_string(mask)); 754a8599bd8SSage Weil return 1; 755a8599bd8SSage Weil } 756a8599bd8SSage Weil 757a8599bd8SSage Weil for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { 758a8599bd8SSage Weil cap = rb_entry(p, struct ceph_cap, ci_node); 759a8599bd8SSage Weil if (!__cap_is_valid(cap)) 760a8599bd8SSage Weil continue; 761a8599bd8SSage Weil if ((cap->issued & mask) == mask) { 762a8599bd8SSage Weil dout("__ceph_caps_issued_mask %p cap %p issued %s" 763a8599bd8SSage Weil " (mask %s)\n", &ci->vfs_inode, cap, 764a8599bd8SSage Weil ceph_cap_string(cap->issued), 765a8599bd8SSage Weil ceph_cap_string(mask)); 766a8599bd8SSage Weil if (touch) 767a8599bd8SSage Weil __touch_cap(cap); 768a8599bd8SSage Weil return 1; 769a8599bd8SSage Weil } 770a8599bd8SSage Weil 771a8599bd8SSage Weil /* does a combination of caps satisfy mask? */ 772a8599bd8SSage Weil have |= cap->issued; 773a8599bd8SSage Weil if ((have & mask) == mask) { 774a8599bd8SSage Weil dout("__ceph_caps_issued_mask %p combo issued %s" 775a8599bd8SSage Weil " (mask %s)\n", &ci->vfs_inode, 776a8599bd8SSage Weil ceph_cap_string(cap->issued), 777a8599bd8SSage Weil ceph_cap_string(mask)); 778a8599bd8SSage Weil if (touch) { 779a8599bd8SSage Weil struct rb_node *q; 780a8599bd8SSage Weil 78125985edcSLucas De Marchi /* touch this + preceding caps */ 782a8599bd8SSage Weil __touch_cap(cap); 783a8599bd8SSage Weil for (q = rb_first(&ci->i_caps); q != p; 784a8599bd8SSage Weil q = rb_next(q)) { 785a8599bd8SSage Weil cap = rb_entry(q, struct ceph_cap, 786a8599bd8SSage Weil ci_node); 787a8599bd8SSage Weil if (!__cap_is_valid(cap)) 788a8599bd8SSage Weil continue; 789a8599bd8SSage Weil __touch_cap(cap); 790a8599bd8SSage Weil } 791a8599bd8SSage Weil } 792a8599bd8SSage Weil return 1; 793a8599bd8SSage Weil } 794a8599bd8SSage Weil } 795a8599bd8SSage Weil 796a8599bd8SSage Weil return 0; 797a8599bd8SSage Weil } 798a8599bd8SSage Weil 799a8599bd8SSage Weil /* 800a8599bd8SSage Weil * Return true if mask caps are currently being revoked by an MDS. 801a8599bd8SSage Weil */ 8026ee6b953SYan, Zheng int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 8036ee6b953SYan, Zheng struct ceph_cap *ocap, int mask) 8046ee6b953SYan, Zheng { 8056ee6b953SYan, Zheng struct ceph_cap *cap; 8066ee6b953SYan, Zheng struct rb_node *p; 8076ee6b953SYan, Zheng 8086ee6b953SYan, Zheng for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { 8096ee6b953SYan, Zheng cap = rb_entry(p, struct ceph_cap, ci_node); 8109563f88cSYan, Zheng if (cap != ocap && 8116ee6b953SYan, Zheng (cap->implemented & ~cap->issued & mask)) 8126ee6b953SYan, Zheng return 1; 8136ee6b953SYan, Zheng } 8146ee6b953SYan, Zheng return 0; 8156ee6b953SYan, Zheng } 8166ee6b953SYan, Zheng 817a8599bd8SSage Weil int ceph_caps_revoking(struct ceph_inode_info *ci, int mask) 818a8599bd8SSage Weil { 819a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 8206ee6b953SYan, Zheng int ret; 821a8599bd8SSage Weil 822be655596SSage Weil spin_lock(&ci->i_ceph_lock); 8236ee6b953SYan, Zheng ret = __ceph_caps_revoking_other(ci, NULL, mask); 824be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 825a8599bd8SSage Weil dout("ceph_caps_revoking %p %s = %d\n", inode, 826a8599bd8SSage Weil ceph_cap_string(mask), ret); 827a8599bd8SSage Weil return ret; 828a8599bd8SSage Weil } 829a8599bd8SSage Weil 830a8599bd8SSage Weil int __ceph_caps_used(struct ceph_inode_info *ci) 831a8599bd8SSage Weil { 832a8599bd8SSage Weil int used = 0; 833a8599bd8SSage Weil if (ci->i_pin_ref) 834a8599bd8SSage Weil used |= CEPH_CAP_PIN; 835a8599bd8SSage Weil if (ci->i_rd_ref) 836a8599bd8SSage Weil used |= CEPH_CAP_FILE_RD; 837a43fb731SSage Weil if (ci->i_rdcache_ref || ci->vfs_inode.i_data.nrpages) 838a8599bd8SSage Weil used |= CEPH_CAP_FILE_CACHE; 839a8599bd8SSage Weil if (ci->i_wr_ref) 840a8599bd8SSage Weil used |= CEPH_CAP_FILE_WR; 841d3d0720dSHenry C Chang if (ci->i_wb_ref || ci->i_wrbuffer_ref) 842a8599bd8SSage Weil used |= CEPH_CAP_FILE_BUFFER; 843a8599bd8SSage Weil return used; 844a8599bd8SSage Weil } 845a8599bd8SSage Weil 846a8599bd8SSage Weil /* 847a8599bd8SSage Weil * wanted, by virtue of open file modes 848a8599bd8SSage Weil */ 849a8599bd8SSage Weil int __ceph_caps_file_wanted(struct ceph_inode_info *ci) 850a8599bd8SSage Weil { 851a8599bd8SSage Weil int want = 0; 852a8599bd8SSage Weil int mode; 85333caad32SSage Weil for (mode = 0; mode < CEPH_FILE_MODE_NUM; mode++) 854a8599bd8SSage Weil if (ci->i_nr_by_mode[mode]) 855a8599bd8SSage Weil want |= ceph_caps_for_mode(mode); 856a8599bd8SSage Weil return want; 857a8599bd8SSage Weil } 858a8599bd8SSage Weil 859a8599bd8SSage Weil /* 860a8599bd8SSage Weil * Return caps we have registered with the MDS(s) as 'wanted'. 861a8599bd8SSage Weil */ 862a8599bd8SSage Weil int __ceph_caps_mds_wanted(struct ceph_inode_info *ci) 863a8599bd8SSage Weil { 864a8599bd8SSage Weil struct ceph_cap *cap; 865a8599bd8SSage Weil struct rb_node *p; 866a8599bd8SSage Weil int mds_wanted = 0; 867a8599bd8SSage Weil 868a8599bd8SSage Weil for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { 869a8599bd8SSage Weil cap = rb_entry(p, struct ceph_cap, ci_node); 870a8599bd8SSage Weil if (!__cap_is_valid(cap)) 871a8599bd8SSage Weil continue; 872a2550604SYan, Zheng if (cap == ci->i_auth_cap) 873a8599bd8SSage Weil mds_wanted |= cap->mds_wanted; 874a2550604SYan, Zheng else 875a2550604SYan, Zheng mds_wanted |= (cap->mds_wanted & ~CEPH_CAP_ANY_FILE_WR); 876a8599bd8SSage Weil } 877a8599bd8SSage Weil return mds_wanted; 878a8599bd8SSage Weil } 879a8599bd8SSage Weil 880a8599bd8SSage Weil /* 881be655596SSage Weil * called under i_ceph_lock 882a8599bd8SSage Weil */ 883a8599bd8SSage Weil static int __ceph_is_any_caps(struct ceph_inode_info *ci) 884a8599bd8SSage Weil { 885d9df2783SYan, Zheng return !RB_EMPTY_ROOT(&ci->i_caps); 886a8599bd8SSage Weil } 887a8599bd8SSage Weil 8889215aeeaSYan, Zheng int ceph_is_any_caps(struct inode *inode) 8899215aeeaSYan, Zheng { 8909215aeeaSYan, Zheng struct ceph_inode_info *ci = ceph_inode(inode); 8919215aeeaSYan, Zheng int ret; 8929215aeeaSYan, Zheng 8939215aeeaSYan, Zheng spin_lock(&ci->i_ceph_lock); 8949215aeeaSYan, Zheng ret = __ceph_is_any_caps(ci); 8959215aeeaSYan, Zheng spin_unlock(&ci->i_ceph_lock); 8969215aeeaSYan, Zheng 8979215aeeaSYan, Zheng return ret; 8989215aeeaSYan, Zheng } 8999215aeeaSYan, Zheng 900a8599bd8SSage Weil /* 901f818a736SSage Weil * Remove a cap. Take steps to deal with a racing iterate_session_caps. 902f818a736SSage Weil * 903be655596SSage Weil * caller should hold i_ceph_lock. 904a6369741SSage Weil * caller will not hold session s_mutex if called from destroy_inode. 905a8599bd8SSage Weil */ 906a096b09aSYan, Zheng void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release) 907a8599bd8SSage Weil { 908a8599bd8SSage Weil struct ceph_mds_session *session = cap->session; 909a8599bd8SSage Weil struct ceph_inode_info *ci = cap->ci; 910640ef79dSCheng Renquan struct ceph_mds_client *mdsc = 9113d14c5d2SYehuda Sadeh ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; 912f818a736SSage Weil int removed = 0; 913a8599bd8SSage Weil 914a8599bd8SSage Weil dout("__ceph_remove_cap %p from %p\n", cap, &ci->vfs_inode); 915a8599bd8SSage Weil 9167c1332b8SSage Weil /* remove from session list */ 9177c1332b8SSage Weil spin_lock(&session->s_cap_lock); 91899a9c273SYan, Zheng /* 91999a9c273SYan, Zheng * s_cap_reconnect is protected by s_cap_lock. no one changes 92099a9c273SYan, Zheng * s_cap_gen while session is in the reconnect state. 92199a9c273SYan, Zheng */ 92299a9c273SYan, Zheng if (queue_release && 92399a9c273SYan, Zheng (!session->s_cap_reconnect || 92499a9c273SYan, Zheng cap->cap_gen == session->s_cap_gen)) 925a096b09aSYan, Zheng __queue_cap_release(session, ci->i_vino.ino, cap->cap_id, 926a096b09aSYan, Zheng cap->mseq, cap->issue_seq); 927a096b09aSYan, Zheng 9287c1332b8SSage Weil if (session->s_cap_iterator == cap) { 9297c1332b8SSage Weil /* not yet, we are iterating over this very cap */ 9307c1332b8SSage Weil dout("__ceph_remove_cap delaying %p removal from session %p\n", 9317c1332b8SSage Weil cap, cap->session); 9327c1332b8SSage Weil } else { 9337c1332b8SSage Weil list_del_init(&cap->session_caps); 9347c1332b8SSage Weil session->s_nr_caps--; 9357c1332b8SSage Weil cap->session = NULL; 936f818a736SSage Weil removed = 1; 9377c1332b8SSage Weil } 938f818a736SSage Weil /* protect backpointer with s_cap_lock: see iterate_session_caps */ 939f818a736SSage Weil cap->ci = NULL; 9407c1332b8SSage Weil spin_unlock(&session->s_cap_lock); 9417c1332b8SSage Weil 942f818a736SSage Weil /* remove from inode list */ 943f818a736SSage Weil rb_erase(&cap->ci_node, &ci->i_caps); 944f818a736SSage Weil if (ci->i_auth_cap == cap) 945f818a736SSage Weil ci->i_auth_cap = NULL; 946f818a736SSage Weil 947f818a736SSage Weil if (removed) 94837151668SYehuda Sadeh ceph_put_cap(mdsc, cap); 949a8599bd8SSage Weil 950a8599bd8SSage Weil if (!__ceph_is_any_caps(ci) && ci->i_snap_realm) { 951a8599bd8SSage Weil struct ceph_snap_realm *realm = ci->i_snap_realm; 952a8599bd8SSage Weil spin_lock(&realm->inodes_with_caps_lock); 953a8599bd8SSage Weil list_del_init(&ci->i_snap_realm_item); 954a8599bd8SSage Weil ci->i_snap_realm_counter++; 955a8599bd8SSage Weil ci->i_snap_realm = NULL; 956a8599bd8SSage Weil spin_unlock(&realm->inodes_with_caps_lock); 957a8599bd8SSage Weil ceph_put_snap_realm(mdsc, realm); 958a8599bd8SSage Weil } 959a8599bd8SSage Weil if (!__ceph_is_any_real_caps(ci)) 960a8599bd8SSage Weil __cap_delay_cancel(mdsc, ci); 961a8599bd8SSage Weil } 962a8599bd8SSage Weil 963a8599bd8SSage Weil /* 964a8599bd8SSage Weil * Build and send a cap message to the given MDS. 965a8599bd8SSage Weil * 966a8599bd8SSage Weil * Caller should be holding s_mutex. 967a8599bd8SSage Weil */ 968a8599bd8SSage Weil static int send_cap_msg(struct ceph_mds_session *session, 969a8599bd8SSage Weil u64 ino, u64 cid, int op, 970a8599bd8SSage Weil int caps, int wanted, int dirty, 971a8599bd8SSage Weil u32 seq, u64 flush_tid, u32 issue_seq, u32 mseq, 972a8599bd8SSage Weil u64 size, u64 max_size, 973a8599bd8SSage Weil struct timespec *mtime, struct timespec *atime, 974a8599bd8SSage Weil u64 time_warp_seq, 97505cb11c1SEric W. Biederman kuid_t uid, kgid_t gid, umode_t mode, 976a8599bd8SSage Weil u64 xattr_version, 977a8599bd8SSage Weil struct ceph_buffer *xattrs_buf, 978a8599bd8SSage Weil u64 follows) 979a8599bd8SSage Weil { 980a8599bd8SSage Weil struct ceph_mds_caps *fc; 981a8599bd8SSage Weil struct ceph_msg *msg; 982a8599bd8SSage Weil 983a8599bd8SSage Weil dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s" 984a8599bd8SSage Weil " seq %u/%u mseq %u follows %lld size %llu/%llu" 985a8599bd8SSage Weil " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(op), 986a8599bd8SSage Weil cid, ino, ceph_cap_string(caps), ceph_cap_string(wanted), 987a8599bd8SSage Weil ceph_cap_string(dirty), 988a8599bd8SSage Weil seq, issue_seq, mseq, follows, size, max_size, 989a8599bd8SSage Weil xattr_version, xattrs_buf ? (int)xattrs_buf->vec.iov_len : 0); 990a8599bd8SSage Weil 991b61c2763SSage Weil msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, sizeof(*fc), GFP_NOFS, false); 992a79832f2SSage Weil if (!msg) 993a79832f2SSage Weil return -ENOMEM; 994a8599bd8SSage Weil 9956df058c0SSage Weil msg->hdr.tid = cpu_to_le64(flush_tid); 996a8599bd8SSage Weil 9976df058c0SSage Weil fc = msg->front.iov_base; 998a8599bd8SSage Weil memset(fc, 0, sizeof(*fc)); 999a8599bd8SSage Weil 1000a8599bd8SSage Weil fc->cap_id = cpu_to_le64(cid); 1001a8599bd8SSage Weil fc->op = cpu_to_le32(op); 1002a8599bd8SSage Weil fc->seq = cpu_to_le32(seq); 1003a8599bd8SSage Weil fc->issue_seq = cpu_to_le32(issue_seq); 1004a8599bd8SSage Weil fc->migrate_seq = cpu_to_le32(mseq); 1005a8599bd8SSage Weil fc->caps = cpu_to_le32(caps); 1006a8599bd8SSage Weil fc->wanted = cpu_to_le32(wanted); 1007a8599bd8SSage Weil fc->dirty = cpu_to_le32(dirty); 1008a8599bd8SSage Weil fc->ino = cpu_to_le64(ino); 1009a8599bd8SSage Weil fc->snap_follows = cpu_to_le64(follows); 1010a8599bd8SSage Weil 1011a8599bd8SSage Weil fc->size = cpu_to_le64(size); 1012a8599bd8SSage Weil fc->max_size = cpu_to_le64(max_size); 1013a8599bd8SSage Weil if (mtime) 1014a8599bd8SSage Weil ceph_encode_timespec(&fc->mtime, mtime); 1015a8599bd8SSage Weil if (atime) 1016a8599bd8SSage Weil ceph_encode_timespec(&fc->atime, atime); 1017a8599bd8SSage Weil fc->time_warp_seq = cpu_to_le32(time_warp_seq); 1018a8599bd8SSage Weil 101905cb11c1SEric W. Biederman fc->uid = cpu_to_le32(from_kuid(&init_user_ns, uid)); 102005cb11c1SEric W. Biederman fc->gid = cpu_to_le32(from_kgid(&init_user_ns, gid)); 1021a8599bd8SSage Weil fc->mode = cpu_to_le32(mode); 1022a8599bd8SSage Weil 1023a8599bd8SSage Weil fc->xattr_version = cpu_to_le64(xattr_version); 1024a8599bd8SSage Weil if (xattrs_buf) { 1025a8599bd8SSage Weil msg->middle = ceph_buffer_get(xattrs_buf); 1026a8599bd8SSage Weil fc->xattr_len = cpu_to_le32(xattrs_buf->vec.iov_len); 1027a8599bd8SSage Weil msg->hdr.middle_len = cpu_to_le32(xattrs_buf->vec.iov_len); 1028a8599bd8SSage Weil } 1029a8599bd8SSage Weil 1030a8599bd8SSage Weil ceph_con_send(&session->s_con, msg); 1031a8599bd8SSage Weil return 0; 1032a8599bd8SSage Weil } 1033a8599bd8SSage Weil 1034d40ee0dcSYan, Zheng void __queue_cap_release(struct ceph_mds_session *session, 10353d7ded4dSSage Weil u64 ino, u64 cap_id, u32 migrate_seq, 10363d7ded4dSSage Weil u32 issue_seq) 10373d7ded4dSSage Weil { 10383d7ded4dSSage Weil struct ceph_msg *msg; 10393d7ded4dSSage Weil struct ceph_mds_cap_release *head; 10403d7ded4dSSage Weil struct ceph_mds_cap_item *item; 10413d7ded4dSSage Weil 10423d7ded4dSSage Weil BUG_ON(!session->s_num_cap_releases); 10433d7ded4dSSage Weil msg = list_first_entry(&session->s_cap_releases, 10443d7ded4dSSage Weil struct ceph_msg, list_head); 10453d7ded4dSSage Weil 10463d7ded4dSSage Weil dout(" adding %llx release to mds%d msg %p (%d left)\n", 10473d7ded4dSSage Weil ino, session->s_mds, msg, session->s_num_cap_releases); 10483d7ded4dSSage Weil 10493d7ded4dSSage Weil BUG_ON(msg->front.iov_len + sizeof(*item) > PAGE_CACHE_SIZE); 10503d7ded4dSSage Weil head = msg->front.iov_base; 1051b905a7f8SWei Yongjun le32_add_cpu(&head->num, 1); 10523d7ded4dSSage Weil item = msg->front.iov_base + msg->front.iov_len; 10533d7ded4dSSage Weil item->ino = cpu_to_le64(ino); 10543d7ded4dSSage Weil item->cap_id = cpu_to_le64(cap_id); 10553d7ded4dSSage Weil item->migrate_seq = cpu_to_le32(migrate_seq); 10563d7ded4dSSage Weil item->seq = cpu_to_le32(issue_seq); 10573d7ded4dSSage Weil 10583d7ded4dSSage Weil session->s_num_cap_releases--; 10593d7ded4dSSage Weil 10603d7ded4dSSage Weil msg->front.iov_len += sizeof(*item); 10613d7ded4dSSage Weil if (le32_to_cpu(head->num) == CEPH_CAPS_PER_RELEASE) { 10623d7ded4dSSage Weil dout(" release msg %p full\n", msg); 10633d7ded4dSSage Weil list_move_tail(&msg->list_head, &session->s_cap_releases_done); 10643d7ded4dSSage Weil } else { 10653d7ded4dSSage Weil dout(" release msg %p at %d/%d (%d)\n", msg, 10663d7ded4dSSage Weil (int)le32_to_cpu(head->num), 10673d7ded4dSSage Weil (int)CEPH_CAPS_PER_RELEASE, 10683d7ded4dSSage Weil (int)msg->front.iov_len); 10693d7ded4dSSage Weil } 10703d7ded4dSSage Weil } 10713d7ded4dSSage Weil 1072a8599bd8SSage Weil /* 1073a6369741SSage Weil * Queue cap releases when an inode is dropped from our cache. Since 1074be655596SSage Weil * inode is about to be destroyed, there is no need for i_ceph_lock. 1075a8599bd8SSage Weil */ 1076a8599bd8SSage Weil void ceph_queue_caps_release(struct inode *inode) 1077a8599bd8SSage Weil { 1078a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1079a8599bd8SSage Weil struct rb_node *p; 1080a8599bd8SSage Weil 1081a8599bd8SSage Weil p = rb_first(&ci->i_caps); 1082a8599bd8SSage Weil while (p) { 1083a8599bd8SSage Weil struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); 1084a8599bd8SSage Weil p = rb_next(p); 1085a096b09aSYan, Zheng __ceph_remove_cap(cap, true); 1086a8599bd8SSage Weil } 1087a8599bd8SSage Weil } 1088a8599bd8SSage Weil 1089a8599bd8SSage Weil /* 1090a8599bd8SSage Weil * Send a cap msg on the given inode. Update our caps state, then 1091be655596SSage Weil * drop i_ceph_lock and send the message. 1092a8599bd8SSage Weil * 1093a8599bd8SSage Weil * Make note of max_size reported/requested from mds, revoked caps 1094a8599bd8SSage Weil * that have now been implemented. 1095a8599bd8SSage Weil * 1096a8599bd8SSage Weil * Make half-hearted attempt ot to invalidate page cache if we are 1097a8599bd8SSage Weil * dropping RDCACHE. Note that this will leave behind locked pages 1098a8599bd8SSage Weil * that we'll then need to deal with elsewhere. 1099a8599bd8SSage Weil * 1100a8599bd8SSage Weil * Return non-zero if delayed release, or we experienced an error 1101a8599bd8SSage Weil * such that the caller should requeue + retry later. 1102a8599bd8SSage Weil * 1103be655596SSage Weil * called with i_ceph_lock, then drops it. 1104a8599bd8SSage Weil * caller should hold snap_rwsem (read), s_mutex. 1105a8599bd8SSage Weil */ 1106a8599bd8SSage Weil static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap, 1107a8599bd8SSage Weil int op, int used, int want, int retain, int flushing, 1108a8599bd8SSage Weil unsigned *pflush_tid) 1109be655596SSage Weil __releases(cap->ci->i_ceph_lock) 1110a8599bd8SSage Weil { 1111a8599bd8SSage Weil struct ceph_inode_info *ci = cap->ci; 1112a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 1113a8599bd8SSage Weil u64 cap_id = cap->cap_id; 111468c28323SSage Weil int held, revoking, dropping, keep; 1115a8599bd8SSage Weil u64 seq, issue_seq, mseq, time_warp_seq, follows; 1116a8599bd8SSage Weil u64 size, max_size; 1117a8599bd8SSage Weil struct timespec mtime, atime; 1118a8599bd8SSage Weil int wake = 0; 11195706b27dSAl Viro umode_t mode; 112005cb11c1SEric W. Biederman kuid_t uid; 112105cb11c1SEric W. Biederman kgid_t gid; 1122a8599bd8SSage Weil struct ceph_mds_session *session; 1123a8599bd8SSage Weil u64 xattr_version = 0; 1124082afec9SSage Weil struct ceph_buffer *xattr_blob = NULL; 1125a8599bd8SSage Weil int delayed = 0; 1126a8599bd8SSage Weil u64 flush_tid = 0; 1127a8599bd8SSage Weil int i; 1128a8599bd8SSage Weil int ret; 1129a8599bd8SSage Weil 113068c28323SSage Weil held = cap->issued | cap->implemented; 113168c28323SSage Weil revoking = cap->implemented & ~cap->issued; 113268c28323SSage Weil retain &= ~revoking; 113368c28323SSage Weil dropping = cap->issued & ~retain; 113468c28323SSage Weil 1135a8599bd8SSage Weil dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n", 1136a8599bd8SSage Weil inode, cap, cap->session, 1137a8599bd8SSage Weil ceph_cap_string(held), ceph_cap_string(held & retain), 1138a8599bd8SSage Weil ceph_cap_string(revoking)); 1139a8599bd8SSage Weil BUG_ON((retain & CEPH_CAP_PIN) == 0); 1140a8599bd8SSage Weil 1141a8599bd8SSage Weil session = cap->session; 1142a8599bd8SSage Weil 1143a8599bd8SSage Weil /* don't release wanted unless we've waited a bit. */ 1144a8599bd8SSage Weil if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 && 1145a8599bd8SSage Weil time_before(jiffies, ci->i_hold_caps_min)) { 1146a8599bd8SSage Weil dout(" delaying issued %s -> %s, wanted %s -> %s on send\n", 1147a8599bd8SSage Weil ceph_cap_string(cap->issued), 1148a8599bd8SSage Weil ceph_cap_string(cap->issued & retain), 1149a8599bd8SSage Weil ceph_cap_string(cap->mds_wanted), 1150a8599bd8SSage Weil ceph_cap_string(want)); 1151a8599bd8SSage Weil want |= cap->mds_wanted; 1152a8599bd8SSage Weil retain |= cap->issued; 1153a8599bd8SSage Weil delayed = 1; 1154a8599bd8SSage Weil } 1155a8599bd8SSage Weil ci->i_ceph_flags &= ~(CEPH_I_NODELAY | CEPH_I_FLUSH); 1156a8599bd8SSage Weil 1157a8599bd8SSage Weil cap->issued &= retain; /* drop bits we don't want */ 1158a8599bd8SSage Weil if (cap->implemented & ~cap->issued) { 1159a8599bd8SSage Weil /* 1160a8599bd8SSage Weil * Wake up any waiters on wanted -> needed transition. 1161a8599bd8SSage Weil * This is due to the weird transition from buffered 1162a8599bd8SSage Weil * to sync IO... we need to flush dirty pages _before_ 1163a8599bd8SSage Weil * allowing sync writes to avoid reordering. 1164a8599bd8SSage Weil */ 1165a8599bd8SSage Weil wake = 1; 1166a8599bd8SSage Weil } 1167a8599bd8SSage Weil cap->implemented &= cap->issued | used; 1168a8599bd8SSage Weil cap->mds_wanted = want; 1169a8599bd8SSage Weil 1170a8599bd8SSage Weil if (flushing) { 1171a8599bd8SSage Weil /* 1172a8599bd8SSage Weil * assign a tid for flush operations so we can avoid 1173a8599bd8SSage Weil * flush1 -> dirty1 -> flush2 -> flushack1 -> mark 1174a8599bd8SSage Weil * clean type races. track latest tid for every bit 1175a8599bd8SSage Weil * so we can handle flush AxFw, flush Fw, and have the 1176a8599bd8SSage Weil * first ack clean Ax. 1177a8599bd8SSage Weil */ 1178a8599bd8SSage Weil flush_tid = ++ci->i_cap_flush_last_tid; 1179a8599bd8SSage Weil if (pflush_tid) 1180a8599bd8SSage Weil *pflush_tid = flush_tid; 1181a8599bd8SSage Weil dout(" cap_flush_tid %d\n", (int)flush_tid); 1182a8599bd8SSage Weil for (i = 0; i < CEPH_CAP_BITS; i++) 1183a8599bd8SSage Weil if (flushing & (1 << i)) 1184a8599bd8SSage Weil ci->i_cap_flush_tid[i] = flush_tid; 11857d8cb26dSSage Weil 11867d8cb26dSSage Weil follows = ci->i_head_snapc->seq; 11877d8cb26dSSage Weil } else { 11887d8cb26dSSage Weil follows = 0; 1189a8599bd8SSage Weil } 1190a8599bd8SSage Weil 1191a8599bd8SSage Weil keep = cap->implemented; 1192a8599bd8SSage Weil seq = cap->seq; 1193a8599bd8SSage Weil issue_seq = cap->issue_seq; 1194a8599bd8SSage Weil mseq = cap->mseq; 1195a8599bd8SSage Weil size = inode->i_size; 1196a8599bd8SSage Weil ci->i_reported_size = size; 1197a8599bd8SSage Weil max_size = ci->i_wanted_max_size; 1198a8599bd8SSage Weil ci->i_requested_max_size = max_size; 1199a8599bd8SSage Weil mtime = inode->i_mtime; 1200a8599bd8SSage Weil atime = inode->i_atime; 1201a8599bd8SSage Weil time_warp_seq = ci->i_time_warp_seq; 1202a8599bd8SSage Weil uid = inode->i_uid; 1203a8599bd8SSage Weil gid = inode->i_gid; 1204a8599bd8SSage Weil mode = inode->i_mode; 1205a8599bd8SSage Weil 1206082afec9SSage Weil if (flushing & CEPH_CAP_XATTR_EXCL) { 1207a8599bd8SSage Weil __ceph_build_xattrs_blob(ci); 1208082afec9SSage Weil xattr_blob = ci->i_xattrs.blob; 1209082afec9SSage Weil xattr_version = ci->i_xattrs.version; 1210a8599bd8SSage Weil } 1211a8599bd8SSage Weil 1212be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1213a8599bd8SSage Weil 1214a8599bd8SSage Weil ret = send_cap_msg(session, ceph_vino(inode).ino, cap_id, 1215a8599bd8SSage Weil op, keep, want, flushing, seq, flush_tid, issue_seq, mseq, 1216a8599bd8SSage Weil size, max_size, &mtime, &atime, time_warp_seq, 1217082afec9SSage Weil uid, gid, mode, xattr_version, xattr_blob, 1218a8599bd8SSage Weil follows); 1219a8599bd8SSage Weil if (ret < 0) { 1220a8599bd8SSage Weil dout("error sending cap msg, must requeue %p\n", inode); 1221a8599bd8SSage Weil delayed = 1; 1222a8599bd8SSage Weil } 1223a8599bd8SSage Weil 1224a8599bd8SSage Weil if (wake) 122503066f23SYehuda Sadeh wake_up_all(&ci->i_cap_wq); 1226a8599bd8SSage Weil 1227a8599bd8SSage Weil return delayed; 1228a8599bd8SSage Weil } 1229a8599bd8SSage Weil 1230a8599bd8SSage Weil /* 1231a8599bd8SSage Weil * When a snapshot is taken, clients accumulate dirty metadata on 1232a8599bd8SSage Weil * inodes with capabilities in ceph_cap_snaps to describe the file 1233a8599bd8SSage Weil * state at the time the snapshot was taken. This must be flushed 1234a8599bd8SSage Weil * asynchronously back to the MDS once sync writes complete and dirty 1235a8599bd8SSage Weil * data is written out. 1236a8599bd8SSage Weil * 1237e835124cSSage Weil * Unless @again is true, skip cap_snaps that were already sent to 1238e835124cSSage Weil * the MDS (i.e., during this session). 1239e835124cSSage Weil * 1240be655596SSage Weil * Called under i_ceph_lock. Takes s_mutex as needed. 1241a8599bd8SSage Weil */ 1242a8599bd8SSage Weil void __ceph_flush_snaps(struct ceph_inode_info *ci, 1243e835124cSSage Weil struct ceph_mds_session **psession, 1244e835124cSSage Weil int again) 1245be655596SSage Weil __releases(ci->i_ceph_lock) 1246be655596SSage Weil __acquires(ci->i_ceph_lock) 1247a8599bd8SSage Weil { 1248a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 1249a8599bd8SSage Weil int mds; 1250a8599bd8SSage Weil struct ceph_cap_snap *capsnap; 1251a8599bd8SSage Weil u32 mseq; 12523d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; 1253a8599bd8SSage Weil struct ceph_mds_session *session = NULL; /* if session != NULL, we hold 1254a8599bd8SSage Weil session->s_mutex */ 1255a8599bd8SSage Weil u64 next_follows = 0; /* keep track of how far we've gotten through the 1256a8599bd8SSage Weil i_cap_snaps list, and skip these entries next time 1257a8599bd8SSage Weil around to avoid an infinite loop */ 1258a8599bd8SSage Weil 1259a8599bd8SSage Weil if (psession) 1260a8599bd8SSage Weil session = *psession; 1261a8599bd8SSage Weil 1262a8599bd8SSage Weil dout("__flush_snaps %p\n", inode); 1263a8599bd8SSage Weil retry: 1264a8599bd8SSage Weil list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { 1265a8599bd8SSage Weil /* avoid an infiniute loop after retry */ 1266a8599bd8SSage Weil if (capsnap->follows < next_follows) 1267a8599bd8SSage Weil continue; 1268a8599bd8SSage Weil /* 1269a8599bd8SSage Weil * we need to wait for sync writes to complete and for dirty 1270a8599bd8SSage Weil * pages to be written out. 1271a8599bd8SSage Weil */ 1272a8599bd8SSage Weil if (capsnap->dirty_pages || capsnap->writing) 1273cfc0bf66SSage Weil break; 1274a8599bd8SSage Weil 1275819ccbfaSSage Weil /* 1276819ccbfaSSage Weil * if cap writeback already occurred, we should have dropped 1277819ccbfaSSage Weil * the capsnap in ceph_put_wrbuffer_cap_refs. 1278819ccbfaSSage Weil */ 1279819ccbfaSSage Weil BUG_ON(capsnap->dirty == 0); 1280819ccbfaSSage Weil 1281a8599bd8SSage Weil /* pick mds, take s_mutex */ 1282ca81f3f6SSage Weil if (ci->i_auth_cap == NULL) { 1283ca81f3f6SSage Weil dout("no auth cap (migrating?), doing nothing\n"); 1284ca81f3f6SSage Weil goto out; 1285ca81f3f6SSage Weil } 1286e835124cSSage Weil 1287e835124cSSage Weil /* only flush each capsnap once */ 1288e835124cSSage Weil if (!again && !list_empty(&capsnap->flushing_item)) { 1289e835124cSSage Weil dout("already flushed %p, skipping\n", capsnap); 1290e835124cSSage Weil continue; 1291e835124cSSage Weil } 1292e835124cSSage Weil 1293ca81f3f6SSage Weil mds = ci->i_auth_cap->session->s_mds; 1294ca81f3f6SSage Weil mseq = ci->i_auth_cap->mseq; 1295ca81f3f6SSage Weil 1296a8599bd8SSage Weil if (session && session->s_mds != mds) { 1297a8599bd8SSage Weil dout("oops, wrong session %p mutex\n", session); 1298a8599bd8SSage Weil mutex_unlock(&session->s_mutex); 1299a8599bd8SSage Weil ceph_put_mds_session(session); 1300a8599bd8SSage Weil session = NULL; 1301a8599bd8SSage Weil } 1302a8599bd8SSage Weil if (!session) { 1303be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1304a8599bd8SSage Weil mutex_lock(&mdsc->mutex); 1305a8599bd8SSage Weil session = __ceph_lookup_mds_session(mdsc, mds); 1306a8599bd8SSage Weil mutex_unlock(&mdsc->mutex); 1307a8599bd8SSage Weil if (session) { 1308a8599bd8SSage Weil dout("inverting session/ino locks on %p\n", 1309a8599bd8SSage Weil session); 1310a8599bd8SSage Weil mutex_lock(&session->s_mutex); 1311a8599bd8SSage Weil } 1312a8599bd8SSage Weil /* 1313a8599bd8SSage Weil * if session == NULL, we raced against a cap 1314ca81f3f6SSage Weil * deletion or migration. retry, and we'll 1315ca81f3f6SSage Weil * get a better @mds value next time. 1316a8599bd8SSage Weil */ 1317be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1318a8599bd8SSage Weil goto retry; 1319a8599bd8SSage Weil } 1320a8599bd8SSage Weil 1321a8599bd8SSage Weil capsnap->flush_tid = ++ci->i_cap_flush_last_tid; 1322a8599bd8SSage Weil atomic_inc(&capsnap->nref); 1323a8599bd8SSage Weil if (!list_empty(&capsnap->flushing_item)) 1324a8599bd8SSage Weil list_del_init(&capsnap->flushing_item); 1325a8599bd8SSage Weil list_add_tail(&capsnap->flushing_item, 1326a8599bd8SSage Weil &session->s_cap_snaps_flushing); 1327be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1328a8599bd8SSage Weil 1329cfc0bf66SSage Weil dout("flush_snaps %p cap_snap %p follows %lld tid %llu\n", 1330cfc0bf66SSage Weil inode, capsnap, capsnap->follows, capsnap->flush_tid); 1331a8599bd8SSage Weil send_cap_msg(session, ceph_vino(inode).ino, 0, 1332a8599bd8SSage Weil CEPH_CAP_OP_FLUSHSNAP, capsnap->issued, 0, 1333a8599bd8SSage Weil capsnap->dirty, 0, capsnap->flush_tid, 0, mseq, 1334a8599bd8SSage Weil capsnap->size, 0, 1335a8599bd8SSage Weil &capsnap->mtime, &capsnap->atime, 1336a8599bd8SSage Weil capsnap->time_warp_seq, 1337a8599bd8SSage Weil capsnap->uid, capsnap->gid, capsnap->mode, 13384a625be4SSage Weil capsnap->xattr_version, capsnap->xattr_blob, 1339a8599bd8SSage Weil capsnap->follows); 1340a8599bd8SSage Weil 1341a8599bd8SSage Weil next_follows = capsnap->follows + 1; 1342a8599bd8SSage Weil ceph_put_cap_snap(capsnap); 1343a8599bd8SSage Weil 1344be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1345a8599bd8SSage Weil goto retry; 1346a8599bd8SSage Weil } 1347a8599bd8SSage Weil 1348a8599bd8SSage Weil /* we flushed them all; remove this inode from the queue */ 1349a8599bd8SSage Weil spin_lock(&mdsc->snap_flush_lock); 1350a8599bd8SSage Weil list_del_init(&ci->i_snap_flush_item); 1351a8599bd8SSage Weil spin_unlock(&mdsc->snap_flush_lock); 1352a8599bd8SSage Weil 1353ca81f3f6SSage Weil out: 1354a8599bd8SSage Weil if (psession) 1355a8599bd8SSage Weil *psession = session; 1356a8599bd8SSage Weil else if (session) { 1357a8599bd8SSage Weil mutex_unlock(&session->s_mutex); 1358a8599bd8SSage Weil ceph_put_mds_session(session); 1359a8599bd8SSage Weil } 1360a8599bd8SSage Weil } 1361a8599bd8SSage Weil 1362a8599bd8SSage Weil static void ceph_flush_snaps(struct ceph_inode_info *ci) 1363a8599bd8SSage Weil { 1364be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1365e835124cSSage Weil __ceph_flush_snaps(ci, NULL, 0); 1366be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1367a8599bd8SSage Weil } 1368a8599bd8SSage Weil 1369a8599bd8SSage Weil /* 1370fca65b4aSSage Weil * Mark caps dirty. If inode is newly dirty, return the dirty flags. 1371fca65b4aSSage Weil * Caller is then responsible for calling __mark_inode_dirty with the 1372fca65b4aSSage Weil * returned flags value. 137376e3b390SSage Weil */ 1374fca65b4aSSage Weil int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask) 137576e3b390SSage Weil { 1376640ef79dSCheng Renquan struct ceph_mds_client *mdsc = 13773d14c5d2SYehuda Sadeh ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; 137876e3b390SSage Weil struct inode *inode = &ci->vfs_inode; 137976e3b390SSage Weil int was = ci->i_dirty_caps; 138076e3b390SSage Weil int dirty = 0; 138176e3b390SSage Weil 138276e3b390SSage Weil dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci->vfs_inode, 138376e3b390SSage Weil ceph_cap_string(mask), ceph_cap_string(was), 138476e3b390SSage Weil ceph_cap_string(was | mask)); 138576e3b390SSage Weil ci->i_dirty_caps |= mask; 138676e3b390SSage Weil if (was == 0) { 13877d8cb26dSSage Weil if (!ci->i_head_snapc) 13887d8cb26dSSage Weil ci->i_head_snapc = ceph_get_snap_context( 13897d8cb26dSSage Weil ci->i_snap_realm->cached_context); 13900685235fSYan, Zheng dout(" inode %p now dirty snapc %p auth cap %p\n", 13910685235fSYan, Zheng &ci->vfs_inode, ci->i_head_snapc, ci->i_auth_cap); 139211df2dfbSYan, Zheng WARN_ON(!ci->i_auth_cap); 139376e3b390SSage Weil BUG_ON(!list_empty(&ci->i_dirty_item)); 139476e3b390SSage Weil spin_lock(&mdsc->cap_dirty_lock); 139576e3b390SSage Weil list_add(&ci->i_dirty_item, &mdsc->cap_dirty); 139676e3b390SSage Weil spin_unlock(&mdsc->cap_dirty_lock); 139776e3b390SSage Weil if (ci->i_flushing_caps == 0) { 13983772d26dSSage Weil ihold(inode); 139976e3b390SSage Weil dirty |= I_DIRTY_SYNC; 140076e3b390SSage Weil } 140176e3b390SSage Weil } 140276e3b390SSage Weil BUG_ON(list_empty(&ci->i_dirty_item)); 140376e3b390SSage Weil if (((was | ci->i_flushing_caps) & CEPH_CAP_FILE_BUFFER) && 140476e3b390SSage Weil (mask & CEPH_CAP_FILE_BUFFER)) 140576e3b390SSage Weil dirty |= I_DIRTY_DATASYNC; 140676e3b390SSage Weil __cap_delay_requeue(mdsc, ci); 1407fca65b4aSSage Weil return dirty; 140876e3b390SSage Weil } 140976e3b390SSage Weil 141076e3b390SSage Weil /* 1411a8599bd8SSage Weil * Add dirty inode to the flushing list. Assigned a seq number so we 1412a8599bd8SSage Weil * can wait for caps to flush without starving. 1413cdc35f96SSage Weil * 1414be655596SSage Weil * Called under i_ceph_lock. 1415a8599bd8SSage Weil */ 1416cdc35f96SSage Weil static int __mark_caps_flushing(struct inode *inode, 1417a8599bd8SSage Weil struct ceph_mds_session *session) 1418a8599bd8SSage Weil { 14193d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 1420a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1421cdc35f96SSage Weil int flushing; 1422a8599bd8SSage Weil 1423cdc35f96SSage Weil BUG_ON(ci->i_dirty_caps == 0); 1424a8599bd8SSage Weil BUG_ON(list_empty(&ci->i_dirty_item)); 1425cdc35f96SSage Weil 1426cdc35f96SSage Weil flushing = ci->i_dirty_caps; 1427cdc35f96SSage Weil dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n", 1428cdc35f96SSage Weil ceph_cap_string(flushing), 1429cdc35f96SSage Weil ceph_cap_string(ci->i_flushing_caps), 1430cdc35f96SSage Weil ceph_cap_string(ci->i_flushing_caps | flushing)); 1431cdc35f96SSage Weil ci->i_flushing_caps |= flushing; 1432cdc35f96SSage Weil ci->i_dirty_caps = 0; 1433afcdaea3SSage Weil dout(" inode %p now !dirty\n", inode); 1434cdc35f96SSage Weil 1435a8599bd8SSage Weil spin_lock(&mdsc->cap_dirty_lock); 1436cdc35f96SSage Weil list_del_init(&ci->i_dirty_item); 1437afcdaea3SSage Weil 1438afcdaea3SSage Weil ci->i_cap_flush_seq = ++mdsc->cap_flush_seq; 1439afcdaea3SSage Weil if (list_empty(&ci->i_flushing_item)) { 1440a8599bd8SSage Weil list_add_tail(&ci->i_flushing_item, &session->s_cap_flushing); 1441a8599bd8SSage Weil mdsc->num_cap_flushing++; 1442afcdaea3SSage Weil dout(" inode %p now flushing seq %lld\n", inode, 1443afcdaea3SSage Weil ci->i_cap_flush_seq); 1444afcdaea3SSage Weil } else { 1445afcdaea3SSage Weil list_move_tail(&ci->i_flushing_item, &session->s_cap_flushing); 1446afcdaea3SSage Weil dout(" inode %p now flushing (more) seq %lld\n", inode, 1447a8599bd8SSage Weil ci->i_cap_flush_seq); 1448a8599bd8SSage Weil } 1449a8599bd8SSage Weil spin_unlock(&mdsc->cap_dirty_lock); 1450cdc35f96SSage Weil 1451cdc35f96SSage Weil return flushing; 1452a8599bd8SSage Weil } 1453a8599bd8SSage Weil 1454a8599bd8SSage Weil /* 14555ecad6fdSSage Weil * try to invalidate mapping pages without blocking. 14565ecad6fdSSage Weil */ 14575ecad6fdSSage Weil static int try_nonblocking_invalidate(struct inode *inode) 14585ecad6fdSSage Weil { 14595ecad6fdSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 14605ecad6fdSSage Weil u32 invalidating_gen = ci->i_rdcache_gen; 14615ecad6fdSSage Weil 1462be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 14635ecad6fdSSage Weil invalidate_mapping_pages(&inode->i_data, 0, -1); 1464be655596SSage Weil spin_lock(&ci->i_ceph_lock); 14655ecad6fdSSage Weil 146618a38193SSage Weil if (inode->i_data.nrpages == 0 && 14675ecad6fdSSage Weil invalidating_gen == ci->i_rdcache_gen) { 14685ecad6fdSSage Weil /* success. */ 14695ecad6fdSSage Weil dout("try_nonblocking_invalidate %p success\n", inode); 1470cd045cb4SSage Weil /* save any racing async invalidate some trouble */ 1471cd045cb4SSage Weil ci->i_rdcache_revoking = ci->i_rdcache_gen - 1; 14725ecad6fdSSage Weil return 0; 14735ecad6fdSSage Weil } 14745ecad6fdSSage Weil dout("try_nonblocking_invalidate %p failed\n", inode); 14755ecad6fdSSage Weil return -1; 14765ecad6fdSSage Weil } 14775ecad6fdSSage Weil 14785ecad6fdSSage Weil /* 1479a8599bd8SSage Weil * Swiss army knife function to examine currently used and wanted 1480a8599bd8SSage Weil * versus held caps. Release, flush, ack revoked caps to mds as 1481a8599bd8SSage Weil * appropriate. 1482a8599bd8SSage Weil * 1483a8599bd8SSage Weil * CHECK_CAPS_NODELAY - caller is delayed work and we should not delay 1484a8599bd8SSage Weil * cap release further. 1485a8599bd8SSage Weil * CHECK_CAPS_AUTHONLY - we should only check the auth cap 1486a8599bd8SSage Weil * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without 1487a8599bd8SSage Weil * further delay. 1488a8599bd8SSage Weil */ 1489a8599bd8SSage Weil void ceph_check_caps(struct ceph_inode_info *ci, int flags, 1490a8599bd8SSage Weil struct ceph_mds_session *session) 1491a8599bd8SSage Weil { 14923d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_inode_to_client(&ci->vfs_inode); 14933d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 1494a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 1495a8599bd8SSage Weil struct ceph_cap *cap; 1496395c312bSYan, Zheng int file_wanted, used, cap_used; 1497a8599bd8SSage Weil int took_snap_rwsem = 0; /* true if mdsc->snap_rwsem held */ 1498cbd03635SSage Weil int issued, implemented, want, retain, revoking, flushing = 0; 1499a8599bd8SSage Weil int mds = -1; /* keep track of how far we've gone through i_caps list 1500a8599bd8SSage Weil to avoid an infinite loop on retry */ 1501a8599bd8SSage Weil struct rb_node *p; 1502a8599bd8SSage Weil int tried_invalidate = 0; 1503a8599bd8SSage Weil int delayed = 0, sent = 0, force_requeue = 0, num; 1504cbd03635SSage Weil int queue_invalidate = 0; 1505a8599bd8SSage Weil int is_delayed = flags & CHECK_CAPS_NODELAY; 1506a8599bd8SSage Weil 1507a8599bd8SSage Weil /* if we are unmounting, flush any unused caps immediately. */ 1508a8599bd8SSage Weil if (mdsc->stopping) 1509a8599bd8SSage Weil is_delayed = 1; 1510a8599bd8SSage Weil 1511be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1512a8599bd8SSage Weil 1513a8599bd8SSage Weil if (ci->i_ceph_flags & CEPH_I_FLUSH) 1514a8599bd8SSage Weil flags |= CHECK_CAPS_FLUSH; 1515a8599bd8SSage Weil 1516a8599bd8SSage Weil /* flush snaps first time around only */ 1517a8599bd8SSage Weil if (!list_empty(&ci->i_cap_snaps)) 1518e835124cSSage Weil __ceph_flush_snaps(ci, &session, 0); 1519a8599bd8SSage Weil goto retry_locked; 1520a8599bd8SSage Weil retry: 1521be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1522a8599bd8SSage Weil retry_locked: 1523a8599bd8SSage Weil file_wanted = __ceph_caps_file_wanted(ci); 1524a8599bd8SSage Weil used = __ceph_caps_used(ci); 1525a8599bd8SSage Weil want = file_wanted | used; 1526cbd03635SSage Weil issued = __ceph_caps_issued(ci, &implemented); 1527cbd03635SSage Weil revoking = implemented & ~issued; 1528a8599bd8SSage Weil 1529a8599bd8SSage Weil retain = want | CEPH_CAP_PIN; 1530a8599bd8SSage Weil if (!mdsc->stopping && inode->i_nlink > 0) { 1531a8599bd8SSage Weil if (want) { 1532a8599bd8SSage Weil retain |= CEPH_CAP_ANY; /* be greedy */ 1533a8599bd8SSage Weil } else { 1534a8599bd8SSage Weil retain |= CEPH_CAP_ANY_SHARED; 1535a8599bd8SSage Weil /* 1536a8599bd8SSage Weil * keep RD only if we didn't have the file open RW, 1537a8599bd8SSage Weil * because then the mds would revoke it anyway to 1538a8599bd8SSage Weil * journal max_size=0. 1539a8599bd8SSage Weil */ 1540a8599bd8SSage Weil if (ci->i_max_size == 0) 1541a8599bd8SSage Weil retain |= CEPH_CAP_ANY_RD; 1542a8599bd8SSage Weil } 1543a8599bd8SSage Weil } 1544a8599bd8SSage Weil 1545a8599bd8SSage Weil dout("check_caps %p file_want %s used %s dirty %s flushing %s" 1546cbd03635SSage Weil " issued %s revoking %s retain %s %s%s%s\n", inode, 1547a8599bd8SSage Weil ceph_cap_string(file_wanted), 1548a8599bd8SSage Weil ceph_cap_string(used), ceph_cap_string(ci->i_dirty_caps), 1549a8599bd8SSage Weil ceph_cap_string(ci->i_flushing_caps), 1550cbd03635SSage Weil ceph_cap_string(issued), ceph_cap_string(revoking), 1551a8599bd8SSage Weil ceph_cap_string(retain), 1552a8599bd8SSage Weil (flags & CHECK_CAPS_AUTHONLY) ? " AUTHONLY" : "", 1553a8599bd8SSage Weil (flags & CHECK_CAPS_NODELAY) ? " NODELAY" : "", 1554a8599bd8SSage Weil (flags & CHECK_CAPS_FLUSH) ? " FLUSH" : ""); 1555a8599bd8SSage Weil 1556a8599bd8SSage Weil /* 1557a8599bd8SSage Weil * If we no longer need to hold onto old our caps, and we may 1558a8599bd8SSage Weil * have cached pages, but don't want them, then try to invalidate. 1559a8599bd8SSage Weil * If we fail, it's because pages are locked.... try again later. 1560a8599bd8SSage Weil */ 1561a8599bd8SSage Weil if ((!is_delayed || mdsc->stopping) && 1562a8599bd8SSage Weil ci->i_wrbuffer_ref == 0 && /* no dirty pages... */ 156393afd449SSage Weil inode->i_data.nrpages && /* have cached pages */ 1564cbd03635SSage Weil (file_wanted == 0 || /* no open files */ 15652962507cSSage Weil (revoking & (CEPH_CAP_FILE_CACHE| 15662962507cSSage Weil CEPH_CAP_FILE_LAZYIO))) && /* or revoking cache */ 1567a8599bd8SSage Weil !tried_invalidate) { 1568a8599bd8SSage Weil dout("check_caps trying to invalidate on %p\n", inode); 15695ecad6fdSSage Weil if (try_nonblocking_invalidate(inode) < 0) { 15702962507cSSage Weil if (revoking & (CEPH_CAP_FILE_CACHE| 15712962507cSSage Weil CEPH_CAP_FILE_LAZYIO)) { 1572cbd03635SSage Weil dout("check_caps queuing invalidate\n"); 1573cbd03635SSage Weil queue_invalidate = 1; 1574cbd03635SSage Weil ci->i_rdcache_revoking = ci->i_rdcache_gen; 1575a8599bd8SSage Weil } else { 1576a8599bd8SSage Weil dout("check_caps failed to invalidate pages\n"); 1577a8599bd8SSage Weil /* we failed to invalidate pages. check these 1578a8599bd8SSage Weil caps again later. */ 1579a8599bd8SSage Weil force_requeue = 1; 1580a8599bd8SSage Weil __cap_set_timeouts(mdsc, ci); 1581a8599bd8SSage Weil } 15825ecad6fdSSage Weil } 1583a8599bd8SSage Weil tried_invalidate = 1; 1584a8599bd8SSage Weil goto retry_locked; 1585a8599bd8SSage Weil } 1586a8599bd8SSage Weil 1587a8599bd8SSage Weil num = 0; 1588a8599bd8SSage Weil for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { 1589a8599bd8SSage Weil cap = rb_entry(p, struct ceph_cap, ci_node); 1590a8599bd8SSage Weil num++; 1591a8599bd8SSage Weil 1592a8599bd8SSage Weil /* avoid looping forever */ 1593a8599bd8SSage Weil if (mds >= cap->mds || 1594a8599bd8SSage Weil ((flags & CHECK_CAPS_AUTHONLY) && cap != ci->i_auth_cap)) 1595a8599bd8SSage Weil continue; 1596a8599bd8SSage Weil 1597a8599bd8SSage Weil /* NOTE: no side-effects allowed, until we take s_mutex */ 1598a8599bd8SSage Weil 1599395c312bSYan, Zheng cap_used = used; 1600395c312bSYan, Zheng if (ci->i_auth_cap && cap != ci->i_auth_cap) 1601395c312bSYan, Zheng cap_used &= ~ci->i_auth_cap->issued; 1602395c312bSYan, Zheng 1603a8599bd8SSage Weil revoking = cap->implemented & ~cap->issued; 1604395c312bSYan, Zheng dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n", 1605088b3f5eSSage Weil cap->mds, cap, ceph_cap_string(cap->issued), 1606395c312bSYan, Zheng ceph_cap_string(cap_used), 1607088b3f5eSSage Weil ceph_cap_string(cap->implemented), 1608a8599bd8SSage Weil ceph_cap_string(revoking)); 1609a8599bd8SSage Weil 1610a8599bd8SSage Weil if (cap == ci->i_auth_cap && 1611a8599bd8SSage Weil (cap->issued & CEPH_CAP_FILE_WR)) { 1612a8599bd8SSage Weil /* request larger max_size from MDS? */ 1613a8599bd8SSage Weil if (ci->i_wanted_max_size > ci->i_max_size && 1614a8599bd8SSage Weil ci->i_wanted_max_size > ci->i_requested_max_size) { 1615a8599bd8SSage Weil dout("requesting new max_size\n"); 1616a8599bd8SSage Weil goto ack; 1617a8599bd8SSage Weil } 1618a8599bd8SSage Weil 1619a8599bd8SSage Weil /* approaching file_max? */ 1620a8599bd8SSage Weil if ((inode->i_size << 1) >= ci->i_max_size && 1621a8599bd8SSage Weil (ci->i_reported_size << 1) < ci->i_max_size) { 1622a8599bd8SSage Weil dout("i_size approaching max_size\n"); 1623a8599bd8SSage Weil goto ack; 1624a8599bd8SSage Weil } 1625a8599bd8SSage Weil } 1626a8599bd8SSage Weil /* flush anything dirty? */ 1627a8599bd8SSage Weil if (cap == ci->i_auth_cap && (flags & CHECK_CAPS_FLUSH) && 1628a8599bd8SSage Weil ci->i_dirty_caps) { 1629a8599bd8SSage Weil dout("flushing dirty caps\n"); 1630a8599bd8SSage Weil goto ack; 1631a8599bd8SSage Weil } 1632a8599bd8SSage Weil 1633a8599bd8SSage Weil /* completed revocation? going down and there are no caps? */ 1634395c312bSYan, Zheng if (revoking && (revoking & cap_used) == 0) { 1635a8599bd8SSage Weil dout("completed revocation of %s\n", 1636a8599bd8SSage Weil ceph_cap_string(cap->implemented & ~cap->issued)); 1637a8599bd8SSage Weil goto ack; 1638a8599bd8SSage Weil } 1639a8599bd8SSage Weil 1640a8599bd8SSage Weil /* want more caps from mds? */ 1641a8599bd8SSage Weil if (want & ~(cap->mds_wanted | cap->issued)) 1642a8599bd8SSage Weil goto ack; 1643a8599bd8SSage Weil 1644a8599bd8SSage Weil /* things we might delay */ 1645a8599bd8SSage Weil if ((cap->issued & ~retain) == 0 && 1646a8599bd8SSage Weil cap->mds_wanted == want) 1647a8599bd8SSage Weil continue; /* nope, all good */ 1648a8599bd8SSage Weil 1649a8599bd8SSage Weil if (is_delayed) 1650a8599bd8SSage Weil goto ack; 1651a8599bd8SSage Weil 1652a8599bd8SSage Weil /* delay? */ 1653a8599bd8SSage Weil if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 && 1654a8599bd8SSage Weil time_before(jiffies, ci->i_hold_caps_max)) { 1655a8599bd8SSage Weil dout(" delaying issued %s -> %s, wanted %s -> %s\n", 1656a8599bd8SSage Weil ceph_cap_string(cap->issued), 1657a8599bd8SSage Weil ceph_cap_string(cap->issued & retain), 1658a8599bd8SSage Weil ceph_cap_string(cap->mds_wanted), 1659a8599bd8SSage Weil ceph_cap_string(want)); 1660a8599bd8SSage Weil delayed++; 1661a8599bd8SSage Weil continue; 1662a8599bd8SSage Weil } 1663a8599bd8SSage Weil 1664a8599bd8SSage Weil ack: 1665e9964c10SSage Weil if (ci->i_ceph_flags & CEPH_I_NOFLUSH) { 1666e9964c10SSage Weil dout(" skipping %p I_NOFLUSH set\n", inode); 1667e9964c10SSage Weil continue; 1668e9964c10SSage Weil } 1669e9964c10SSage Weil 1670a8599bd8SSage Weil if (session && session != cap->session) { 1671a8599bd8SSage Weil dout("oops, wrong session %p mutex\n", session); 1672a8599bd8SSage Weil mutex_unlock(&session->s_mutex); 1673a8599bd8SSage Weil session = NULL; 1674a8599bd8SSage Weil } 1675a8599bd8SSage Weil if (!session) { 1676a8599bd8SSage Weil session = cap->session; 1677a8599bd8SSage Weil if (mutex_trylock(&session->s_mutex) == 0) { 1678a8599bd8SSage Weil dout("inverting session/ino locks on %p\n", 1679a8599bd8SSage Weil session); 1680be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1681a8599bd8SSage Weil if (took_snap_rwsem) { 1682a8599bd8SSage Weil up_read(&mdsc->snap_rwsem); 1683a8599bd8SSage Weil took_snap_rwsem = 0; 1684a8599bd8SSage Weil } 1685a8599bd8SSage Weil mutex_lock(&session->s_mutex); 1686a8599bd8SSage Weil goto retry; 1687a8599bd8SSage Weil } 1688a8599bd8SSage Weil } 1689a8599bd8SSage Weil /* take snap_rwsem after session mutex */ 1690a8599bd8SSage Weil if (!took_snap_rwsem) { 1691a8599bd8SSage Weil if (down_read_trylock(&mdsc->snap_rwsem) == 0) { 1692a8599bd8SSage Weil dout("inverting snap/in locks on %p\n", 1693a8599bd8SSage Weil inode); 1694be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1695a8599bd8SSage Weil down_read(&mdsc->snap_rwsem); 1696a8599bd8SSage Weil took_snap_rwsem = 1; 1697a8599bd8SSage Weil goto retry; 1698a8599bd8SSage Weil } 1699a8599bd8SSage Weil took_snap_rwsem = 1; 1700a8599bd8SSage Weil } 1701a8599bd8SSage Weil 1702cdc35f96SSage Weil if (cap == ci->i_auth_cap && ci->i_dirty_caps) 1703cdc35f96SSage Weil flushing = __mark_caps_flushing(inode, session); 170424be0c48SSage Weil else 170524be0c48SSage Weil flushing = 0; 1706a8599bd8SSage Weil 1707a8599bd8SSage Weil mds = cap->mds; /* remember mds, so we don't repeat */ 1708a8599bd8SSage Weil sent++; 1709a8599bd8SSage Weil 1710be655596SSage Weil /* __send_cap drops i_ceph_lock */ 1711395c312bSYan, Zheng delayed += __send_cap(mdsc, cap, CEPH_CAP_OP_UPDATE, cap_used, 1712395c312bSYan, Zheng want, retain, flushing, NULL); 1713be655596SSage Weil goto retry; /* retake i_ceph_lock and restart our cap scan. */ 1714a8599bd8SSage Weil } 1715a8599bd8SSage Weil 1716a8599bd8SSage Weil /* 1717a8599bd8SSage Weil * Reschedule delayed caps release if we delayed anything, 1718a8599bd8SSage Weil * otherwise cancel. 1719a8599bd8SSage Weil */ 1720a8599bd8SSage Weil if (delayed && is_delayed) 1721a8599bd8SSage Weil force_requeue = 1; /* __send_cap delayed release; requeue */ 1722a8599bd8SSage Weil if (!delayed && !is_delayed) 1723a8599bd8SSage Weil __cap_delay_cancel(mdsc, ci); 1724a8599bd8SSage Weil else if (!is_delayed || force_requeue) 1725a8599bd8SSage Weil __cap_delay_requeue(mdsc, ci); 1726a8599bd8SSage Weil 1727be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1728a8599bd8SSage Weil 1729cbd03635SSage Weil if (queue_invalidate) 17303c6f6b79SSage Weil ceph_queue_invalidate(inode); 1731cbd03635SSage Weil 1732cdc2ce05SSage Weil if (session) 1733a8599bd8SSage Weil mutex_unlock(&session->s_mutex); 1734a8599bd8SSage Weil if (took_snap_rwsem) 1735a8599bd8SSage Weil up_read(&mdsc->snap_rwsem); 1736a8599bd8SSage Weil } 1737a8599bd8SSage Weil 1738a8599bd8SSage Weil /* 1739a8599bd8SSage Weil * Try to flush dirty caps back to the auth mds. 1740a8599bd8SSage Weil */ 17414fe59789SYan, Zheng static int try_flush_caps(struct inode *inode, unsigned *flush_tid) 1742a8599bd8SSage Weil { 17433d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 1744a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1745a8599bd8SSage Weil int flushing = 0; 17464fe59789SYan, Zheng struct ceph_mds_session *session = NULL; 1747a8599bd8SSage Weil 1748a8599bd8SSage Weil retry: 1749be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1750e9964c10SSage Weil if (ci->i_ceph_flags & CEPH_I_NOFLUSH) { 1751e9964c10SSage Weil dout("try_flush_caps skipping %p I_NOFLUSH set\n", inode); 1752e9964c10SSage Weil goto out; 1753e9964c10SSage Weil } 1754a8599bd8SSage Weil if (ci->i_dirty_caps && ci->i_auth_cap) { 1755a8599bd8SSage Weil struct ceph_cap *cap = ci->i_auth_cap; 1756a8599bd8SSage Weil int used = __ceph_caps_used(ci); 1757a8599bd8SSage Weil int want = __ceph_caps_wanted(ci); 1758a8599bd8SSage Weil int delayed; 1759a8599bd8SSage Weil 17604fe59789SYan, Zheng if (!session || session != cap->session) { 1761be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 17624fe59789SYan, Zheng if (session) 17634fe59789SYan, Zheng mutex_unlock(&session->s_mutex); 1764a8599bd8SSage Weil session = cap->session; 1765a8599bd8SSage Weil mutex_lock(&session->s_mutex); 1766a8599bd8SSage Weil goto retry; 1767a8599bd8SSage Weil } 1768a8599bd8SSage Weil if (cap->session->s_state < CEPH_MDS_SESSION_OPEN) 1769a8599bd8SSage Weil goto out; 1770a8599bd8SSage Weil 1771cdc35f96SSage Weil flushing = __mark_caps_flushing(inode, session); 1772a8599bd8SSage Weil 1773be655596SSage Weil /* __send_cap drops i_ceph_lock */ 1774a8599bd8SSage Weil delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, used, want, 1775a8599bd8SSage Weil cap->issued | cap->implemented, flushing, 1776a8599bd8SSage Weil flush_tid); 1777a8599bd8SSage Weil if (!delayed) 1778a8599bd8SSage Weil goto out_unlocked; 1779a8599bd8SSage Weil 1780be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1781a8599bd8SSage Weil __cap_delay_requeue(mdsc, ci); 1782a8599bd8SSage Weil } 1783a8599bd8SSage Weil out: 1784be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1785a8599bd8SSage Weil out_unlocked: 17864fe59789SYan, Zheng if (session) 1787a8599bd8SSage Weil mutex_unlock(&session->s_mutex); 1788a8599bd8SSage Weil return flushing; 1789a8599bd8SSage Weil } 1790a8599bd8SSage Weil 1791a8599bd8SSage Weil /* 1792a8599bd8SSage Weil * Return true if we've flushed caps through the given flush_tid. 1793a8599bd8SSage Weil */ 1794a8599bd8SSage Weil static int caps_are_flushed(struct inode *inode, unsigned tid) 1795a8599bd8SSage Weil { 1796a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1797a5ee751cSDan Carpenter int i, ret = 1; 1798a8599bd8SSage Weil 1799be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1800a8599bd8SSage Weil for (i = 0; i < CEPH_CAP_BITS; i++) 1801a8599bd8SSage Weil if ((ci->i_flushing_caps & (1 << i)) && 1802a8599bd8SSage Weil ci->i_cap_flush_tid[i] <= tid) { 1803a8599bd8SSage Weil /* still flushing this bit */ 1804a8599bd8SSage Weil ret = 0; 1805a8599bd8SSage Weil break; 1806a8599bd8SSage Weil } 1807be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1808a8599bd8SSage Weil return ret; 1809a8599bd8SSage Weil } 1810a8599bd8SSage Weil 1811a8599bd8SSage Weil /* 1812a8599bd8SSage Weil * Wait on any unsafe replies for the given inode. First wait on the 1813a8599bd8SSage Weil * newest request, and make that the upper bound. Then, if there are 1814a8599bd8SSage Weil * more requests, keep waiting on the oldest as long as it is still older 1815a8599bd8SSage Weil * than the original request. 1816a8599bd8SSage Weil */ 1817a8599bd8SSage Weil static void sync_write_wait(struct inode *inode) 1818a8599bd8SSage Weil { 1819a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1820a8599bd8SSage Weil struct list_head *head = &ci->i_unsafe_writes; 1821a8599bd8SSage Weil struct ceph_osd_request *req; 1822a8599bd8SSage Weil u64 last_tid; 1823a8599bd8SSage Weil 1824a8599bd8SSage Weil spin_lock(&ci->i_unsafe_lock); 1825a8599bd8SSage Weil if (list_empty(head)) 1826a8599bd8SSage Weil goto out; 1827a8599bd8SSage Weil 1828a8599bd8SSage Weil /* set upper bound as _last_ entry in chain */ 1829a8599bd8SSage Weil req = list_entry(head->prev, struct ceph_osd_request, 1830a8599bd8SSage Weil r_unsafe_item); 1831a8599bd8SSage Weil last_tid = req->r_tid; 1832a8599bd8SSage Weil 1833a8599bd8SSage Weil do { 1834a8599bd8SSage Weil ceph_osdc_get_request(req); 1835a8599bd8SSage Weil spin_unlock(&ci->i_unsafe_lock); 1836a8599bd8SSage Weil dout("sync_write_wait on tid %llu (until %llu)\n", 1837a8599bd8SSage Weil req->r_tid, last_tid); 1838a8599bd8SSage Weil wait_for_completion(&req->r_safe_completion); 1839a8599bd8SSage Weil spin_lock(&ci->i_unsafe_lock); 1840a8599bd8SSage Weil ceph_osdc_put_request(req); 1841a8599bd8SSage Weil 1842a8599bd8SSage Weil /* 1843a8599bd8SSage Weil * from here on look at first entry in chain, since we 1844a8599bd8SSage Weil * only want to wait for anything older than last_tid 1845a8599bd8SSage Weil */ 1846a8599bd8SSage Weil if (list_empty(head)) 1847a8599bd8SSage Weil break; 1848a8599bd8SSage Weil req = list_entry(head->next, struct ceph_osd_request, 1849a8599bd8SSage Weil r_unsafe_item); 1850a8599bd8SSage Weil } while (req->r_tid < last_tid); 1851a8599bd8SSage Weil out: 1852a8599bd8SSage Weil spin_unlock(&ci->i_unsafe_lock); 1853a8599bd8SSage Weil } 1854a8599bd8SSage Weil 185502c24a82SJosef Bacik int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync) 1856a8599bd8SSage Weil { 18577ea80859SChristoph Hellwig struct inode *inode = file->f_mapping->host; 1858a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1859a8599bd8SSage Weil unsigned flush_tid; 1860a8599bd8SSage Weil int ret; 1861a8599bd8SSage Weil int dirty; 1862a8599bd8SSage Weil 1863a8599bd8SSage Weil dout("fsync %p%s\n", inode, datasync ? " datasync" : ""); 1864a8599bd8SSage Weil sync_write_wait(inode); 1865a8599bd8SSage Weil 186602c24a82SJosef Bacik ret = filemap_write_and_wait_range(inode->i_mapping, start, end); 1867a8599bd8SSage Weil if (ret < 0) 1868a8599bd8SSage Weil return ret; 186902c24a82SJosef Bacik mutex_lock(&inode->i_mutex); 1870a8599bd8SSage Weil 18714fe59789SYan, Zheng dirty = try_flush_caps(inode, &flush_tid); 1872a8599bd8SSage Weil dout("fsync dirty caps are %s\n", ceph_cap_string(dirty)); 1873a8599bd8SSage Weil 1874a8599bd8SSage Weil /* 1875a8599bd8SSage Weil * only wait on non-file metadata writeback (the mds 1876a8599bd8SSage Weil * can recover size and mtime, so we don't need to 1877a8599bd8SSage Weil * wait for that) 1878a8599bd8SSage Weil */ 1879a8599bd8SSage Weil if (!datasync && (dirty & ~CEPH_CAP_ANY_FILE_WR)) { 1880a8599bd8SSage Weil dout("fsync waiting for flush_tid %u\n", flush_tid); 1881a8599bd8SSage Weil ret = wait_event_interruptible(ci->i_cap_wq, 1882a8599bd8SSage Weil caps_are_flushed(inode, flush_tid)); 1883a8599bd8SSage Weil } 1884a8599bd8SSage Weil 1885a8599bd8SSage Weil dout("fsync %p%s done\n", inode, datasync ? " datasync" : ""); 188602c24a82SJosef Bacik mutex_unlock(&inode->i_mutex); 1887a8599bd8SSage Weil return ret; 1888a8599bd8SSage Weil } 1889a8599bd8SSage Weil 1890a8599bd8SSage Weil /* 1891a8599bd8SSage Weil * Flush any dirty caps back to the mds. If we aren't asked to wait, 1892a8599bd8SSage Weil * queue inode for flush but don't do so immediately, because we can 1893a8599bd8SSage Weil * get by with fewer MDS messages if we wait for data writeback to 1894a8599bd8SSage Weil * complete first. 1895a8599bd8SSage Weil */ 1896f1a3d572SStephen Rothwell int ceph_write_inode(struct inode *inode, struct writeback_control *wbc) 1897a8599bd8SSage Weil { 1898a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1899a8599bd8SSage Weil unsigned flush_tid; 1900a8599bd8SSage Weil int err = 0; 1901a8599bd8SSage Weil int dirty; 1902f1a3d572SStephen Rothwell int wait = wbc->sync_mode == WB_SYNC_ALL; 1903a8599bd8SSage Weil 1904a8599bd8SSage Weil dout("write_inode %p wait=%d\n", inode, wait); 1905a8599bd8SSage Weil if (wait) { 19064fe59789SYan, Zheng dirty = try_flush_caps(inode, &flush_tid); 1907a8599bd8SSage Weil if (dirty) 1908a8599bd8SSage Weil err = wait_event_interruptible(ci->i_cap_wq, 1909a8599bd8SSage Weil caps_are_flushed(inode, flush_tid)); 1910a8599bd8SSage Weil } else { 1911640ef79dSCheng Renquan struct ceph_mds_client *mdsc = 19123d14c5d2SYehuda Sadeh ceph_sb_to_client(inode->i_sb)->mdsc; 1913a8599bd8SSage Weil 1914be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1915a8599bd8SSage Weil if (__ceph_caps_dirty(ci)) 1916a8599bd8SSage Weil __cap_delay_requeue_front(mdsc, ci); 1917be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1918a8599bd8SSage Weil } 1919a8599bd8SSage Weil return err; 1920a8599bd8SSage Weil } 1921a8599bd8SSage Weil 1922a8599bd8SSage Weil /* 1923a8599bd8SSage Weil * After a recovering MDS goes active, we need to resend any caps 1924a8599bd8SSage Weil * we were flushing. 1925a8599bd8SSage Weil * 1926a8599bd8SSage Weil * Caller holds session->s_mutex. 1927a8599bd8SSage Weil */ 1928a8599bd8SSage Weil static void kick_flushing_capsnaps(struct ceph_mds_client *mdsc, 1929a8599bd8SSage Weil struct ceph_mds_session *session) 1930a8599bd8SSage Weil { 1931a8599bd8SSage Weil struct ceph_cap_snap *capsnap; 1932a8599bd8SSage Weil 1933a8599bd8SSage Weil dout("kick_flushing_capsnaps mds%d\n", session->s_mds); 1934a8599bd8SSage Weil list_for_each_entry(capsnap, &session->s_cap_snaps_flushing, 1935a8599bd8SSage Weil flushing_item) { 1936a8599bd8SSage Weil struct ceph_inode_info *ci = capsnap->ci; 1937a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 1938a8599bd8SSage Weil struct ceph_cap *cap; 1939a8599bd8SSage Weil 1940be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1941a8599bd8SSage Weil cap = ci->i_auth_cap; 1942a8599bd8SSage Weil if (cap && cap->session == session) { 1943a8599bd8SSage Weil dout("kick_flushing_caps %p cap %p capsnap %p\n", inode, 1944a8599bd8SSage Weil cap, capsnap); 1945e835124cSSage Weil __ceph_flush_snaps(ci, &session, 1); 1946a8599bd8SSage Weil } else { 1947a8599bd8SSage Weil pr_err("%p auth cap %p not mds%d ???\n", inode, 1948a8599bd8SSage Weil cap, session->s_mds); 1949a8599bd8SSage Weil } 1950be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1951a8599bd8SSage Weil } 1952a8599bd8SSage Weil } 1953a8599bd8SSage Weil 1954a8599bd8SSage Weil void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1955a8599bd8SSage Weil struct ceph_mds_session *session) 1956a8599bd8SSage Weil { 1957a8599bd8SSage Weil struct ceph_inode_info *ci; 1958a8599bd8SSage Weil 1959a8599bd8SSage Weil kick_flushing_capsnaps(mdsc, session); 1960a8599bd8SSage Weil 1961a8599bd8SSage Weil dout("kick_flushing_caps mds%d\n", session->s_mds); 1962a8599bd8SSage Weil list_for_each_entry(ci, &session->s_cap_flushing, i_flushing_item) { 1963a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 1964a8599bd8SSage Weil struct ceph_cap *cap; 1965a8599bd8SSage Weil int delayed = 0; 1966a8599bd8SSage Weil 1967be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1968a8599bd8SSage Weil cap = ci->i_auth_cap; 1969a8599bd8SSage Weil if (cap && cap->session == session) { 1970a8599bd8SSage Weil dout("kick_flushing_caps %p cap %p %s\n", inode, 1971a8599bd8SSage Weil cap, ceph_cap_string(ci->i_flushing_caps)); 1972a8599bd8SSage Weil delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, 1973a8599bd8SSage Weil __ceph_caps_used(ci), 1974a8599bd8SSage Weil __ceph_caps_wanted(ci), 1975a8599bd8SSage Weil cap->issued | cap->implemented, 1976a8599bd8SSage Weil ci->i_flushing_caps, NULL); 1977a8599bd8SSage Weil if (delayed) { 1978be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1979a8599bd8SSage Weil __cap_delay_requeue(mdsc, ci); 1980be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1981a8599bd8SSage Weil } 1982a8599bd8SSage Weil } else { 1983a8599bd8SSage Weil pr_err("%p auth cap %p not mds%d ???\n", inode, 1984a8599bd8SSage Weil cap, session->s_mds); 1985be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1986a8599bd8SSage Weil } 1987a8599bd8SSage Weil } 1988a8599bd8SSage Weil } 1989a8599bd8SSage Weil 1990088b3f5eSSage Weil static void kick_flushing_inode_caps(struct ceph_mds_client *mdsc, 1991088b3f5eSSage Weil struct ceph_mds_session *session, 1992088b3f5eSSage Weil struct inode *inode) 1993088b3f5eSSage Weil { 1994088b3f5eSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1995088b3f5eSSage Weil struct ceph_cap *cap; 1996088b3f5eSSage Weil int delayed = 0; 1997088b3f5eSSage Weil 1998be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1999088b3f5eSSage Weil cap = ci->i_auth_cap; 2000088b3f5eSSage Weil dout("kick_flushing_inode_caps %p flushing %s flush_seq %lld\n", inode, 2001088b3f5eSSage Weil ceph_cap_string(ci->i_flushing_caps), ci->i_cap_flush_seq); 2002005c4697SYan, Zheng 2003088b3f5eSSage Weil __ceph_flush_snaps(ci, &session, 1); 2004005c4697SYan, Zheng 2005088b3f5eSSage Weil if (ci->i_flushing_caps) { 2006005c4697SYan, Zheng spin_lock(&mdsc->cap_dirty_lock); 2007005c4697SYan, Zheng list_move_tail(&ci->i_flushing_item, 2008005c4697SYan, Zheng &cap->session->s_cap_flushing); 2009005c4697SYan, Zheng spin_unlock(&mdsc->cap_dirty_lock); 2010005c4697SYan, Zheng 2011088b3f5eSSage Weil delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, 2012088b3f5eSSage Weil __ceph_caps_used(ci), 2013088b3f5eSSage Weil __ceph_caps_wanted(ci), 2014088b3f5eSSage Weil cap->issued | cap->implemented, 2015088b3f5eSSage Weil ci->i_flushing_caps, NULL); 2016088b3f5eSSage Weil if (delayed) { 2017be655596SSage Weil spin_lock(&ci->i_ceph_lock); 2018088b3f5eSSage Weil __cap_delay_requeue(mdsc, ci); 2019be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2020088b3f5eSSage Weil } 2021088b3f5eSSage Weil } else { 2022be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2023088b3f5eSSage Weil } 2024088b3f5eSSage Weil } 2025088b3f5eSSage Weil 2026a8599bd8SSage Weil 2027a8599bd8SSage Weil /* 2028a8599bd8SSage Weil * Take references to capabilities we hold, so that we don't release 2029a8599bd8SSage Weil * them to the MDS prematurely. 2030a8599bd8SSage Weil * 2031be655596SSage Weil * Protected by i_ceph_lock. 2032a8599bd8SSage Weil */ 2033a8599bd8SSage Weil static void __take_cap_refs(struct ceph_inode_info *ci, int got) 2034a8599bd8SSage Weil { 2035a8599bd8SSage Weil if (got & CEPH_CAP_PIN) 2036a8599bd8SSage Weil ci->i_pin_ref++; 2037a8599bd8SSage Weil if (got & CEPH_CAP_FILE_RD) 2038a8599bd8SSage Weil ci->i_rd_ref++; 2039a8599bd8SSage Weil if (got & CEPH_CAP_FILE_CACHE) 2040a8599bd8SSage Weil ci->i_rdcache_ref++; 2041a8599bd8SSage Weil if (got & CEPH_CAP_FILE_WR) 2042a8599bd8SSage Weil ci->i_wr_ref++; 2043a8599bd8SSage Weil if (got & CEPH_CAP_FILE_BUFFER) { 2044d3d0720dSHenry C Chang if (ci->i_wb_ref == 0) 20453772d26dSSage Weil ihold(&ci->vfs_inode); 2046d3d0720dSHenry C Chang ci->i_wb_ref++; 2047d3d0720dSHenry C Chang dout("__take_cap_refs %p wb %d -> %d (?)\n", 2048d3d0720dSHenry C Chang &ci->vfs_inode, ci->i_wb_ref-1, ci->i_wb_ref); 2049a8599bd8SSage Weil } 2050a8599bd8SSage Weil } 2051a8599bd8SSage Weil 2052a8599bd8SSage Weil /* 2053a8599bd8SSage Weil * Try to grab cap references. Specify those refs we @want, and the 2054a8599bd8SSage Weil * minimal set we @need. Also include the larger offset we are writing 2055a8599bd8SSage Weil * to (when applicable), and check against max_size here as well. 2056a8599bd8SSage Weil * Note that caller is responsible for ensuring max_size increases are 2057a8599bd8SSage Weil * requested from the MDS. 2058a8599bd8SSage Weil */ 2059a8599bd8SSage Weil static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want, 2060a8599bd8SSage Weil int *got, loff_t endoff, int *check_max, int *err) 2061a8599bd8SSage Weil { 2062a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 2063a8599bd8SSage Weil int ret = 0; 2064a8599bd8SSage Weil int have, implemented; 2065195d3ce2SSage Weil int file_wanted; 2066a8599bd8SSage Weil 2067a8599bd8SSage Weil dout("get_cap_refs %p need %s want %s\n", inode, 2068a8599bd8SSage Weil ceph_cap_string(need), ceph_cap_string(want)); 2069be655596SSage Weil spin_lock(&ci->i_ceph_lock); 2070a8599bd8SSage Weil 2071195d3ce2SSage Weil /* make sure file is actually open */ 2072195d3ce2SSage Weil file_wanted = __ceph_caps_file_wanted(ci); 2073195d3ce2SSage Weil if ((file_wanted & need) == 0) { 2074195d3ce2SSage Weil dout("try_get_cap_refs need %s file_wanted %s, EBADF\n", 2075195d3ce2SSage Weil ceph_cap_string(need), ceph_cap_string(file_wanted)); 2076a8599bd8SSage Weil *err = -EBADF; 2077a8599bd8SSage Weil ret = 1; 2078a8599bd8SSage Weil goto out; 2079a8599bd8SSage Weil } 2080a8599bd8SSage Weil 208137505d57SYan, Zheng /* finish pending truncate */ 208237505d57SYan, Zheng while (ci->i_truncate_pending) { 208337505d57SYan, Zheng spin_unlock(&ci->i_ceph_lock); 2084b415bf4fSYan, Zheng __ceph_do_pending_vmtruncate(inode); 208537505d57SYan, Zheng spin_lock(&ci->i_ceph_lock); 208637505d57SYan, Zheng } 208737505d57SYan, Zheng 20883871cbb9SYan, Zheng have = __ceph_caps_issued(ci, &implemented); 20893871cbb9SYan, Zheng 20903871cbb9SYan, Zheng if (have & need & CEPH_CAP_FILE_WR) { 2091a8599bd8SSage Weil if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) { 2092a8599bd8SSage Weil dout("get_cap_refs %p endoff %llu > maxsize %llu\n", 2093a8599bd8SSage Weil inode, endoff, ci->i_max_size); 20943871cbb9SYan, Zheng if (endoff > ci->i_requested_max_size) { 2095a8599bd8SSage Weil *check_max = 1; 2096a8599bd8SSage Weil ret = 1; 2097a8599bd8SSage Weil } 2098a8599bd8SSage Weil goto out; 2099a8599bd8SSage Weil } 2100a8599bd8SSage Weil /* 2101a8599bd8SSage Weil * If a sync write is in progress, we must wait, so that we 2102a8599bd8SSage Weil * can get a final snapshot value for size+mtime. 2103a8599bd8SSage Weil */ 2104a8599bd8SSage Weil if (__ceph_have_pending_cap_snap(ci)) { 2105a8599bd8SSage Weil dout("get_cap_refs %p cap_snap_pending\n", inode); 2106a8599bd8SSage Weil goto out; 2107a8599bd8SSage Weil } 2108a8599bd8SSage Weil } 2109a8599bd8SSage Weil 2110a8599bd8SSage Weil if ((have & need) == need) { 2111a8599bd8SSage Weil /* 2112a8599bd8SSage Weil * Look at (implemented & ~have & not) so that we keep waiting 2113a8599bd8SSage Weil * on transition from wanted -> needed caps. This is needed 2114a8599bd8SSage Weil * for WRBUFFER|WR -> WR to avoid a new WR sync write from 2115a8599bd8SSage Weil * going before a prior buffered writeback happens. 2116a8599bd8SSage Weil */ 2117a8599bd8SSage Weil int not = want & ~(have & need); 2118a8599bd8SSage Weil int revoking = implemented & ~have; 2119a8599bd8SSage Weil dout("get_cap_refs %p have %s but not %s (revoking %s)\n", 2120a8599bd8SSage Weil inode, ceph_cap_string(have), ceph_cap_string(not), 2121a8599bd8SSage Weil ceph_cap_string(revoking)); 2122a8599bd8SSage Weil if ((revoking & not) == 0) { 2123a8599bd8SSage Weil *got = need | (have & want); 2124a8599bd8SSage Weil __take_cap_refs(ci, *got); 2125a8599bd8SSage Weil ret = 1; 2126a8599bd8SSage Weil } 2127a8599bd8SSage Weil } else { 2128a8599bd8SSage Weil dout("get_cap_refs %p have %s needed %s\n", inode, 2129a8599bd8SSage Weil ceph_cap_string(have), ceph_cap_string(need)); 2130a8599bd8SSage Weil } 2131a8599bd8SSage Weil out: 2132be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2133a8599bd8SSage Weil dout("get_cap_refs %p ret %d got %s\n", inode, 2134a8599bd8SSage Weil ret, ceph_cap_string(*got)); 2135a8599bd8SSage Weil return ret; 2136a8599bd8SSage Weil } 2137a8599bd8SSage Weil 2138a8599bd8SSage Weil /* 2139a8599bd8SSage Weil * Check the offset we are writing up to against our current 2140a8599bd8SSage Weil * max_size. If necessary, tell the MDS we want to write to 2141a8599bd8SSage Weil * a larger offset. 2142a8599bd8SSage Weil */ 2143a8599bd8SSage Weil static void check_max_size(struct inode *inode, loff_t endoff) 2144a8599bd8SSage Weil { 2145a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 2146a8599bd8SSage Weil int check = 0; 2147a8599bd8SSage Weil 2148a8599bd8SSage Weil /* do we need to explicitly request a larger max_size? */ 2149be655596SSage Weil spin_lock(&ci->i_ceph_lock); 21503871cbb9SYan, Zheng if (endoff >= ci->i_max_size && endoff > ci->i_wanted_max_size) { 2151a8599bd8SSage Weil dout("write %p at large endoff %llu, req max_size\n", 2152a8599bd8SSage Weil inode, endoff); 2153a8599bd8SSage Weil ci->i_wanted_max_size = endoff; 2154a8599bd8SSage Weil } 21553871cbb9SYan, Zheng /* duplicate ceph_check_caps()'s logic */ 21563871cbb9SYan, Zheng if (ci->i_auth_cap && 21573871cbb9SYan, Zheng (ci->i_auth_cap->issued & CEPH_CAP_FILE_WR) && 21583871cbb9SYan, Zheng ci->i_wanted_max_size > ci->i_max_size && 21593871cbb9SYan, Zheng ci->i_wanted_max_size > ci->i_requested_max_size) 21603871cbb9SYan, Zheng check = 1; 2161be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2162a8599bd8SSage Weil if (check) 2163a8599bd8SSage Weil ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); 2164a8599bd8SSage Weil } 2165a8599bd8SSage Weil 2166a8599bd8SSage Weil /* 2167a8599bd8SSage Weil * Wait for caps, and take cap references. If we can't get a WR cap 2168a8599bd8SSage Weil * due to a small max_size, make sure we check_max_size (and possibly 2169a8599bd8SSage Weil * ask the mds) so we don't get hung up indefinitely. 2170a8599bd8SSage Weil */ 2171a8599bd8SSage Weil int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, int *got, 2172a8599bd8SSage Weil loff_t endoff) 2173a8599bd8SSage Weil { 2174a8599bd8SSage Weil int check_max, ret, err; 2175a8599bd8SSage Weil 2176a8599bd8SSage Weil retry: 2177a8599bd8SSage Weil if (endoff > 0) 2178a8599bd8SSage Weil check_max_size(&ci->vfs_inode, endoff); 2179a8599bd8SSage Weil check_max = 0; 2180a8599bd8SSage Weil err = 0; 2181a8599bd8SSage Weil ret = wait_event_interruptible(ci->i_cap_wq, 2182a8599bd8SSage Weil try_get_cap_refs(ci, need, want, 2183a8599bd8SSage Weil got, endoff, 2184a8599bd8SSage Weil &check_max, &err)); 2185a8599bd8SSage Weil if (err) 2186a8599bd8SSage Weil ret = err; 2187a8599bd8SSage Weil if (check_max) 2188a8599bd8SSage Weil goto retry; 2189a8599bd8SSage Weil return ret; 2190a8599bd8SSage Weil } 2191a8599bd8SSage Weil 2192a8599bd8SSage Weil /* 2193a8599bd8SSage Weil * Take cap refs. Caller must already know we hold at least one ref 2194a8599bd8SSage Weil * on the caps in question or we don't know this is safe. 2195a8599bd8SSage Weil */ 2196a8599bd8SSage Weil void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps) 2197a8599bd8SSage Weil { 2198be655596SSage Weil spin_lock(&ci->i_ceph_lock); 2199a8599bd8SSage Weil __take_cap_refs(ci, caps); 2200be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2201a8599bd8SSage Weil } 2202a8599bd8SSage Weil 2203a8599bd8SSage Weil /* 2204a8599bd8SSage Weil * Release cap refs. 2205a8599bd8SSage Weil * 2206a8599bd8SSage Weil * If we released the last ref on any given cap, call ceph_check_caps 2207a8599bd8SSage Weil * to release (or schedule a release). 2208a8599bd8SSage Weil * 2209a8599bd8SSage Weil * If we are releasing a WR cap (from a sync write), finalize any affected 2210a8599bd8SSage Weil * cap_snap, and wake up any waiters. 2211a8599bd8SSage Weil */ 2212a8599bd8SSage Weil void ceph_put_cap_refs(struct ceph_inode_info *ci, int had) 2213a8599bd8SSage Weil { 2214a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 2215a8599bd8SSage Weil int last = 0, put = 0, flushsnaps = 0, wake = 0; 2216a8599bd8SSage Weil struct ceph_cap_snap *capsnap; 2217a8599bd8SSage Weil 2218be655596SSage Weil spin_lock(&ci->i_ceph_lock); 2219a8599bd8SSage Weil if (had & CEPH_CAP_PIN) 2220a8599bd8SSage Weil --ci->i_pin_ref; 2221a8599bd8SSage Weil if (had & CEPH_CAP_FILE_RD) 2222a8599bd8SSage Weil if (--ci->i_rd_ref == 0) 2223a8599bd8SSage Weil last++; 2224a8599bd8SSage Weil if (had & CEPH_CAP_FILE_CACHE) 2225a8599bd8SSage Weil if (--ci->i_rdcache_ref == 0) 2226a8599bd8SSage Weil last++; 2227a8599bd8SSage Weil if (had & CEPH_CAP_FILE_BUFFER) { 2228d3d0720dSHenry C Chang if (--ci->i_wb_ref == 0) { 2229a8599bd8SSage Weil last++; 2230a8599bd8SSage Weil put++; 2231a8599bd8SSage Weil } 2232d3d0720dSHenry C Chang dout("put_cap_refs %p wb %d -> %d (?)\n", 2233d3d0720dSHenry C Chang inode, ci->i_wb_ref+1, ci->i_wb_ref); 2234a8599bd8SSage Weil } 2235a8599bd8SSage Weil if (had & CEPH_CAP_FILE_WR) 2236a8599bd8SSage Weil if (--ci->i_wr_ref == 0) { 2237a8599bd8SSage Weil last++; 2238a8599bd8SSage Weil if (!list_empty(&ci->i_cap_snaps)) { 2239a8599bd8SSage Weil capsnap = list_first_entry(&ci->i_cap_snaps, 2240a8599bd8SSage Weil struct ceph_cap_snap, 2241a8599bd8SSage Weil ci_item); 2242a8599bd8SSage Weil if (capsnap->writing) { 2243a8599bd8SSage Weil capsnap->writing = 0; 2244a8599bd8SSage Weil flushsnaps = 2245a8599bd8SSage Weil __ceph_finish_cap_snap(ci, 2246a8599bd8SSage Weil capsnap); 2247a8599bd8SSage Weil wake = 1; 2248a8599bd8SSage Weil } 2249a8599bd8SSage Weil } 2250a8599bd8SSage Weil } 2251be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2252a8599bd8SSage Weil 2253819ccbfaSSage Weil dout("put_cap_refs %p had %s%s%s\n", inode, ceph_cap_string(had), 2254819ccbfaSSage Weil last ? " last" : "", put ? " put" : ""); 2255a8599bd8SSage Weil 2256a8599bd8SSage Weil if (last && !flushsnaps) 2257a8599bd8SSage Weil ceph_check_caps(ci, 0, NULL); 2258a8599bd8SSage Weil else if (flushsnaps) 2259a8599bd8SSage Weil ceph_flush_snaps(ci); 2260a8599bd8SSage Weil if (wake) 226103066f23SYehuda Sadeh wake_up_all(&ci->i_cap_wq); 2262a8599bd8SSage Weil if (put) 2263a8599bd8SSage Weil iput(inode); 2264a8599bd8SSage Weil } 2265a8599bd8SSage Weil 2266a8599bd8SSage Weil /* 2267a8599bd8SSage Weil * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap 2268a8599bd8SSage Weil * context. Adjust per-snap dirty page accounting as appropriate. 2269a8599bd8SSage Weil * Once all dirty data for a cap_snap is flushed, flush snapped file 2270a8599bd8SSage Weil * metadata back to the MDS. If we dropped the last ref, call 2271a8599bd8SSage Weil * ceph_check_caps. 2272a8599bd8SSage Weil */ 2273a8599bd8SSage Weil void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 2274a8599bd8SSage Weil struct ceph_snap_context *snapc) 2275a8599bd8SSage Weil { 2276a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 2277a8599bd8SSage Weil int last = 0; 2278819ccbfaSSage Weil int complete_capsnap = 0; 2279819ccbfaSSage Weil int drop_capsnap = 0; 2280a8599bd8SSage Weil int found = 0; 2281a8599bd8SSage Weil struct ceph_cap_snap *capsnap = NULL; 2282a8599bd8SSage Weil 2283be655596SSage Weil spin_lock(&ci->i_ceph_lock); 2284a8599bd8SSage Weil ci->i_wrbuffer_ref -= nr; 2285a8599bd8SSage Weil last = !ci->i_wrbuffer_ref; 2286a8599bd8SSage Weil 2287a8599bd8SSage Weil if (ci->i_head_snapc == snapc) { 2288a8599bd8SSage Weil ci->i_wrbuffer_ref_head -= nr; 22897d8cb26dSSage Weil if (ci->i_wrbuffer_ref_head == 0 && 22907d8cb26dSSage Weil ci->i_dirty_caps == 0 && ci->i_flushing_caps == 0) { 22917d8cb26dSSage Weil BUG_ON(!ci->i_head_snapc); 2292a8599bd8SSage Weil ceph_put_snap_context(ci->i_head_snapc); 2293a8599bd8SSage Weil ci->i_head_snapc = NULL; 2294a8599bd8SSage Weil } 2295a8599bd8SSage Weil dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n", 2296a8599bd8SSage Weil inode, 2297a8599bd8SSage Weil ci->i_wrbuffer_ref+nr, ci->i_wrbuffer_ref_head+nr, 2298a8599bd8SSage Weil ci->i_wrbuffer_ref, ci->i_wrbuffer_ref_head, 2299a8599bd8SSage Weil last ? " LAST" : ""); 2300a8599bd8SSage Weil } else { 2301a8599bd8SSage Weil list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { 2302a8599bd8SSage Weil if (capsnap->context == snapc) { 2303a8599bd8SSage Weil found = 1; 2304a8599bd8SSage Weil break; 2305a8599bd8SSage Weil } 2306a8599bd8SSage Weil } 2307a8599bd8SSage Weil BUG_ON(!found); 2308819ccbfaSSage Weil capsnap->dirty_pages -= nr; 2309819ccbfaSSage Weil if (capsnap->dirty_pages == 0) { 2310819ccbfaSSage Weil complete_capsnap = 1; 2311819ccbfaSSage Weil if (capsnap->dirty == 0) 2312819ccbfaSSage Weil /* cap writeback completed before we created 2313819ccbfaSSage Weil * the cap_snap; no FLUSHSNAP is needed */ 2314819ccbfaSSage Weil drop_capsnap = 1; 2315819ccbfaSSage Weil } 2316a8599bd8SSage Weil dout("put_wrbuffer_cap_refs on %p cap_snap %p " 2317819ccbfaSSage Weil " snap %lld %d/%d -> %d/%d %s%s%s\n", 2318a8599bd8SSage Weil inode, capsnap, capsnap->context->seq, 2319a8599bd8SSage Weil ci->i_wrbuffer_ref+nr, capsnap->dirty_pages + nr, 2320a8599bd8SSage Weil ci->i_wrbuffer_ref, capsnap->dirty_pages, 2321a8599bd8SSage Weil last ? " (wrbuffer last)" : "", 2322819ccbfaSSage Weil complete_capsnap ? " (complete capsnap)" : "", 2323819ccbfaSSage Weil drop_capsnap ? " (drop capsnap)" : ""); 2324819ccbfaSSage Weil if (drop_capsnap) { 2325819ccbfaSSage Weil ceph_put_snap_context(capsnap->context); 2326819ccbfaSSage Weil list_del(&capsnap->ci_item); 2327819ccbfaSSage Weil list_del(&capsnap->flushing_item); 2328819ccbfaSSage Weil ceph_put_cap_snap(capsnap); 2329819ccbfaSSage Weil } 2330a8599bd8SSage Weil } 2331a8599bd8SSage Weil 2332be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2333a8599bd8SSage Weil 2334a8599bd8SSage Weil if (last) { 2335a8599bd8SSage Weil ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); 2336a8599bd8SSage Weil iput(inode); 2337819ccbfaSSage Weil } else if (complete_capsnap) { 2338a8599bd8SSage Weil ceph_flush_snaps(ci); 233903066f23SYehuda Sadeh wake_up_all(&ci->i_cap_wq); 2340a8599bd8SSage Weil } 2341819ccbfaSSage Weil if (drop_capsnap) 2342819ccbfaSSage Weil iput(inode); 2343a8599bd8SSage Weil } 2344a8599bd8SSage Weil 2345a8599bd8SSage Weil /* 2346ca20c991SYan, Zheng * Invalidate unlinked inode's aliases, so we can drop the inode ASAP. 2347ca20c991SYan, Zheng */ 2348ca20c991SYan, Zheng static void invalidate_aliases(struct inode *inode) 2349ca20c991SYan, Zheng { 2350ca20c991SYan, Zheng struct dentry *dn, *prev = NULL; 2351ca20c991SYan, Zheng 2352ca20c991SYan, Zheng dout("invalidate_aliases inode %p\n", inode); 2353ca20c991SYan, Zheng d_prune_aliases(inode); 2354ca20c991SYan, Zheng /* 2355ca20c991SYan, Zheng * For non-directory inode, d_find_alias() only returns 2356fc12c80aSJ. Bruce Fields * hashed dentry. After calling d_invalidate(), the 2357fc12c80aSJ. Bruce Fields * dentry becomes unhashed. 2358ca20c991SYan, Zheng * 2359a8d436f0SYan, Zheng * For directory inode, d_find_alias() can return 2360fc12c80aSJ. Bruce Fields * unhashed dentry. But directory inode should have 2361ca20c991SYan, Zheng * one alias at most. 2362ca20c991SYan, Zheng */ 2363ca20c991SYan, Zheng while ((dn = d_find_alias(inode))) { 2364ca20c991SYan, Zheng if (dn == prev) { 2365ca20c991SYan, Zheng dput(dn); 2366ca20c991SYan, Zheng break; 2367ca20c991SYan, Zheng } 2368a8d436f0SYan, Zheng d_invalidate(dn); 2369ca20c991SYan, Zheng if (prev) 2370ca20c991SYan, Zheng dput(prev); 2371ca20c991SYan, Zheng prev = dn; 2372ca20c991SYan, Zheng } 2373ca20c991SYan, Zheng if (prev) 2374ca20c991SYan, Zheng dput(prev); 2375ca20c991SYan, Zheng } 2376ca20c991SYan, Zheng 2377ca20c991SYan, Zheng /* 2378a8599bd8SSage Weil * Handle a cap GRANT message from the MDS. (Note that a GRANT may 2379a8599bd8SSage Weil * actually be a revocation if it specifies a smaller cap set.) 2380a8599bd8SSage Weil * 2381be655596SSage Weil * caller holds s_mutex and i_ceph_lock, we drop both. 2382a8599bd8SSage Weil */ 23832cd698beSYan, Zheng static void handle_cap_grant(struct ceph_mds_client *mdsc, 23842cd698beSYan, Zheng struct inode *inode, struct ceph_mds_caps *grant, 23852cd698beSYan, Zheng void *snaptrace, int snaptrace_len, 23862cd698beSYan, Zheng struct ceph_buffer *xattr_buf, 2387a8599bd8SSage Weil struct ceph_mds_session *session, 23882cd698beSYan, Zheng struct ceph_cap *cap, int issued) 2389be655596SSage Weil __releases(ci->i_ceph_lock) 2390a8599bd8SSage Weil { 2391a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 2392a8599bd8SSage Weil int mds = session->s_mds; 23932f56f56aSSage Weil int seq = le32_to_cpu(grant->seq); 2394a8599bd8SSage Weil int newcaps = le32_to_cpu(grant->caps); 23952cd698beSYan, Zheng int used, wanted, dirty; 2396a8599bd8SSage Weil u64 size = le64_to_cpu(grant->size); 2397a8599bd8SSage Weil u64 max_size = le64_to_cpu(grant->max_size); 2398a8599bd8SSage Weil struct timespec mtime, atime, ctime; 239915637c8bSSage Weil int check_caps = 0; 2400ab6c2c3eSFabian Frederick bool wake = false; 2401ab6c2c3eSFabian Frederick bool writeback = false; 2402ab6c2c3eSFabian Frederick bool queue_trunc = false; 2403ab6c2c3eSFabian Frederick bool queue_invalidate = false; 2404ab6c2c3eSFabian Frederick bool queue_revalidate = false; 2405ab6c2c3eSFabian Frederick bool deleted_inode = false; 2406a8599bd8SSage Weil 24072f56f56aSSage Weil dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n", 24082f56f56aSSage Weil inode, cap, mds, seq, ceph_cap_string(newcaps)); 2409a8599bd8SSage Weil dout(" size %llu max_size %llu, i_size %llu\n", size, max_size, 2410a8599bd8SSage Weil inode->i_size); 2411a8599bd8SSage Weil 241211df2dfbSYan, Zheng 241311df2dfbSYan, Zheng /* 241411df2dfbSYan, Zheng * auth mds of the inode changed. we received the cap export message, 241511df2dfbSYan, Zheng * but still haven't received the cap import message. handle_cap_export 241611df2dfbSYan, Zheng * updated the new auth MDS' cap. 241711df2dfbSYan, Zheng * 241811df2dfbSYan, Zheng * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message 241911df2dfbSYan, Zheng * that was sent before the cap import message. So don't remove caps. 242011df2dfbSYan, Zheng */ 242111df2dfbSYan, Zheng if (ceph_seq_cmp(seq, cap->seq) <= 0) { 242211df2dfbSYan, Zheng WARN_ON(cap != ci->i_auth_cap); 242311df2dfbSYan, Zheng WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id)); 242411df2dfbSYan, Zheng seq = cap->seq; 242511df2dfbSYan, Zheng newcaps |= cap->issued; 242611df2dfbSYan, Zheng } 242711df2dfbSYan, Zheng 2428a8599bd8SSage Weil /* 2429a8599bd8SSage Weil * If CACHE is being revoked, and we have no dirty buffers, 2430a8599bd8SSage Weil * try to invalidate (once). (If there are dirty buffers, we 2431a8599bd8SSage Weil * will invalidate _after_ writeback.) 2432a8599bd8SSage Weil */ 24333b454c49SSage Weil if (((cap->issued & ~newcaps) & CEPH_CAP_FILE_CACHE) && 24343b454c49SSage Weil (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && 2435bcd2cbd1SYehuda Sadeh !ci->i_wrbuffer_ref) { 2436e9075743SLi Wang if (try_nonblocking_invalidate(inode)) { 2437a8599bd8SSage Weil /* there were locked pages.. invalidate later 2438a8599bd8SSage Weil in a separate thread. */ 2439a8599bd8SSage Weil if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 2440ab6c2c3eSFabian Frederick queue_invalidate = true; 2441a8599bd8SSage Weil ci->i_rdcache_revoking = ci->i_rdcache_gen; 2442a8599bd8SSage Weil } 2443a8599bd8SSage Weil } 244499ccbd22SMilosz Tanski 244599ccbd22SMilosz Tanski ceph_fscache_invalidate(inode); 2446a8599bd8SSage Weil } 2447a8599bd8SSage Weil 2448a8599bd8SSage Weil /* side effects now are allowed */ 2449685f9a5dSSage Weil cap->cap_gen = session->s_cap_gen; 245011df2dfbSYan, Zheng cap->seq = seq; 2451a8599bd8SSage Weil 2452a8599bd8SSage Weil __check_cap_issue(ci, cap, newcaps); 2453a8599bd8SSage Weil 2454f98a128aSYan, Zheng if ((newcaps & CEPH_CAP_AUTH_SHARED) && 2455f98a128aSYan, Zheng (issued & CEPH_CAP_AUTH_EXCL) == 0) { 2456a8599bd8SSage Weil inode->i_mode = le32_to_cpu(grant->mode); 245705cb11c1SEric W. Biederman inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(grant->uid)); 245805cb11c1SEric W. Biederman inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(grant->gid)); 2459a8599bd8SSage Weil dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, 2460bd2bae6aSEric W. Biederman from_kuid(&init_user_ns, inode->i_uid), 2461bd2bae6aSEric W. Biederman from_kgid(&init_user_ns, inode->i_gid)); 2462a8599bd8SSage Weil } 2463a8599bd8SSage Weil 2464f98a128aSYan, Zheng if ((newcaps & CEPH_CAP_AUTH_SHARED) && 2465f98a128aSYan, Zheng (issued & CEPH_CAP_LINK_EXCL) == 0) { 2466bfe86848SMiklos Szeredi set_nlink(inode, le32_to_cpu(grant->nlink)); 2467ca20c991SYan, Zheng if (inode->i_nlink == 0 && 2468ca20c991SYan, Zheng (newcaps & (CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL))) 2469ab6c2c3eSFabian Frederick deleted_inode = true; 2470ca20c991SYan, Zheng } 2471a8599bd8SSage Weil 2472a8599bd8SSage Weil if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && grant->xattr_len) { 2473a8599bd8SSage Weil int len = le32_to_cpu(grant->xattr_len); 2474a8599bd8SSage Weil u64 version = le64_to_cpu(grant->xattr_version); 2475a8599bd8SSage Weil 2476a8599bd8SSage Weil if (version > ci->i_xattrs.version) { 2477a8599bd8SSage Weil dout(" got new xattrs v%llu on %p len %d\n", 2478a8599bd8SSage Weil version, inode, len); 2479a8599bd8SSage Weil if (ci->i_xattrs.blob) 2480a8599bd8SSage Weil ceph_buffer_put(ci->i_xattrs.blob); 2481a8599bd8SSage Weil ci->i_xattrs.blob = ceph_buffer_get(xattr_buf); 2482a8599bd8SSage Weil ci->i_xattrs.version = version; 24837221fe4cSGuangliang Zhao ceph_forget_all_cached_acls(inode); 2484a8599bd8SSage Weil } 2485a8599bd8SSage Weil } 2486a8599bd8SSage Weil 248799ccbd22SMilosz Tanski /* Do we need to revalidate our fscache cookie. Don't bother on the 248899ccbd22SMilosz Tanski * first cache cap as we already validate at cookie creation time. */ 248999ccbd22SMilosz Tanski if ((issued & CEPH_CAP_FILE_CACHE) && ci->i_rdcache_gen > 1) 2490ab6c2c3eSFabian Frederick queue_revalidate = true; 249199ccbd22SMilosz Tanski 2492f98a128aSYan, Zheng if (newcaps & CEPH_CAP_ANY_RD) { 2493f98a128aSYan, Zheng /* ctime/mtime/atime? */ 2494a8599bd8SSage Weil ceph_decode_timespec(&mtime, &grant->mtime); 2495a8599bd8SSage Weil ceph_decode_timespec(&atime, &grant->atime); 2496a8599bd8SSage Weil ceph_decode_timespec(&ctime, &grant->ctime); 2497a8599bd8SSage Weil ceph_fill_file_time(inode, issued, 2498f98a128aSYan, Zheng le32_to_cpu(grant->time_warp_seq), 2499f98a128aSYan, Zheng &ctime, &mtime, &atime); 2500f98a128aSYan, Zheng } 2501a8599bd8SSage Weil 2502f98a128aSYan, Zheng if (newcaps & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)) { 250311df2dfbSYan, Zheng /* file layout may have changed */ 250411df2dfbSYan, Zheng ci->i_layout = grant->layout; 2505f98a128aSYan, Zheng /* size/truncate_seq? */ 2506f98a128aSYan, Zheng queue_trunc = ceph_fill_file_size(inode, issued, 2507f98a128aSYan, Zheng le32_to_cpu(grant->truncate_seq), 2508f98a128aSYan, Zheng le64_to_cpu(grant->truncate_size), 2509f98a128aSYan, Zheng size); 2510a8599bd8SSage Weil /* max size increase? */ 25115e62ad30SYan, Zheng if (ci->i_auth_cap == cap && max_size != ci->i_max_size) { 2512f98a128aSYan, Zheng dout("max_size %lld -> %llu\n", 2513f98a128aSYan, Zheng ci->i_max_size, max_size); 2514a8599bd8SSage Weil ci->i_max_size = max_size; 2515a8599bd8SSage Weil if (max_size >= ci->i_wanted_max_size) { 2516a8599bd8SSage Weil ci->i_wanted_max_size = 0; /* reset */ 2517a8599bd8SSage Weil ci->i_requested_max_size = 0; 2518a8599bd8SSage Weil } 2519ab6c2c3eSFabian Frederick wake = true; 2520a8599bd8SSage Weil } 2521f98a128aSYan, Zheng } 2522a8599bd8SSage Weil 2523a8599bd8SSage Weil /* check cap bits */ 2524a8599bd8SSage Weil wanted = __ceph_caps_wanted(ci); 2525a8599bd8SSage Weil used = __ceph_caps_used(ci); 2526a8599bd8SSage Weil dirty = __ceph_caps_dirty(ci); 2527a8599bd8SSage Weil dout(" my wanted = %s, used = %s, dirty %s\n", 2528a8599bd8SSage Weil ceph_cap_string(wanted), 2529a8599bd8SSage Weil ceph_cap_string(used), 2530a8599bd8SSage Weil ceph_cap_string(dirty)); 2531a8599bd8SSage Weil if (wanted != le32_to_cpu(grant->wanted)) { 2532a8599bd8SSage Weil dout("mds wanted %s -> %s\n", 2533a8599bd8SSage Weil ceph_cap_string(le32_to_cpu(grant->wanted)), 2534a8599bd8SSage Weil ceph_cap_string(wanted)); 2535390306c3SYan, Zheng /* imported cap may not have correct mds_wanted */ 2536390306c3SYan, Zheng if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) 2537390306c3SYan, Zheng check_caps = 1; 2538a8599bd8SSage Weil } 2539a8599bd8SSage Weil 2540a8599bd8SSage Weil /* revocation, grant, or no-op? */ 2541a8599bd8SSage Weil if (cap->issued & ~newcaps) { 25423b454c49SSage Weil int revoking = cap->issued & ~newcaps; 25433b454c49SSage Weil 25443b454c49SSage Weil dout("revocation: %s -> %s (revoking %s)\n", 25453b454c49SSage Weil ceph_cap_string(cap->issued), 25463b454c49SSage Weil ceph_cap_string(newcaps), 25473b454c49SSage Weil ceph_cap_string(revoking)); 25480eb6cd49SSage Weil if (revoking & used & CEPH_CAP_FILE_BUFFER) 2549ab6c2c3eSFabian Frederick writeback = true; /* initiate writeback; will delay ack */ 25503b454c49SSage Weil else if (revoking == CEPH_CAP_FILE_CACHE && 25513b454c49SSage Weil (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && 25523b454c49SSage Weil queue_invalidate) 25533b454c49SSage Weil ; /* do nothing yet, invalidation will be queued */ 25543b454c49SSage Weil else if (cap == ci->i_auth_cap) 25553b454c49SSage Weil check_caps = 1; /* check auth cap only */ 25563b454c49SSage Weil else 25573b454c49SSage Weil check_caps = 2; /* check all caps */ 2558a8599bd8SSage Weil cap->issued = newcaps; 2559978097c9SSage Weil cap->implemented |= newcaps; 2560a8599bd8SSage Weil } else if (cap->issued == newcaps) { 2561a8599bd8SSage Weil dout("caps unchanged: %s -> %s\n", 2562a8599bd8SSage Weil ceph_cap_string(cap->issued), ceph_cap_string(newcaps)); 2563a8599bd8SSage Weil } else { 2564a8599bd8SSage Weil dout("grant: %s -> %s\n", ceph_cap_string(cap->issued), 2565a8599bd8SSage Weil ceph_cap_string(newcaps)); 25666ee6b953SYan, Zheng /* non-auth MDS is revoking the newly grant caps ? */ 25676ee6b953SYan, Zheng if (cap == ci->i_auth_cap && 25686ee6b953SYan, Zheng __ceph_caps_revoking_other(ci, cap, newcaps)) 25696ee6b953SYan, Zheng check_caps = 2; 25706ee6b953SYan, Zheng 2571a8599bd8SSage Weil cap->issued = newcaps; 2572a8599bd8SSage Weil cap->implemented |= newcaps; /* add bits only, to 2573a8599bd8SSage Weil * avoid stepping on a 2574a8599bd8SSage Weil * pending revocation */ 2575ab6c2c3eSFabian Frederick wake = true; 2576a8599bd8SSage Weil } 2577978097c9SSage Weil BUG_ON(cap->issued & ~cap->implemented); 2578a8599bd8SSage Weil 2579be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 258099ccbd22SMilosz Tanski 25812cd698beSYan, Zheng if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) { 25822cd698beSYan, Zheng down_write(&mdsc->snap_rwsem); 25832cd698beSYan, Zheng ceph_update_snap_trace(mdsc, snaptrace, 25842cd698beSYan, Zheng snaptrace + snaptrace_len, false); 25852cd698beSYan, Zheng downgrade_write(&mdsc->snap_rwsem); 25862cd698beSYan, Zheng kick_flushing_inode_caps(mdsc, session, inode); 25872cd698beSYan, Zheng up_read(&mdsc->snap_rwsem); 25882cd698beSYan, Zheng if (newcaps & ~issued) 2589ab6c2c3eSFabian Frederick wake = true; 25902cd698beSYan, Zheng } 25912cd698beSYan, Zheng 2592c6bcda6fSYan, Zheng if (queue_trunc) { 2593c6bcda6fSYan, Zheng ceph_queue_vmtruncate(inode); 2594c6bcda6fSYan, Zheng ceph_queue_revalidate(inode); 2595c6bcda6fSYan, Zheng } else if (queue_revalidate) 2596c6bcda6fSYan, Zheng ceph_queue_revalidate(inode); 2597c6bcda6fSYan, Zheng 25983c6f6b79SSage Weil if (writeback) 2599a8599bd8SSage Weil /* 2600a8599bd8SSage Weil * queue inode for writeback: we can't actually call 2601a8599bd8SSage Weil * filemap_write_and_wait, etc. from message handler 2602a8599bd8SSage Weil * context. 2603a8599bd8SSage Weil */ 26043c6f6b79SSage Weil ceph_queue_writeback(inode); 26053c6f6b79SSage Weil if (queue_invalidate) 26063c6f6b79SSage Weil ceph_queue_invalidate(inode); 2607ca20c991SYan, Zheng if (deleted_inode) 2608ca20c991SYan, Zheng invalidate_aliases(inode); 2609a8599bd8SSage Weil if (wake) 261003066f23SYehuda Sadeh wake_up_all(&ci->i_cap_wq); 261115637c8bSSage Weil 261215637c8bSSage Weil if (check_caps == 1) 261315637c8bSSage Weil ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_AUTHONLY, 261415637c8bSSage Weil session); 261515637c8bSSage Weil else if (check_caps == 2) 261615637c8bSSage Weil ceph_check_caps(ci, CHECK_CAPS_NODELAY, session); 261715637c8bSSage Weil else 261815637c8bSSage Weil mutex_unlock(&session->s_mutex); 2619a8599bd8SSage Weil } 2620a8599bd8SSage Weil 2621a8599bd8SSage Weil /* 2622a8599bd8SSage Weil * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the 2623a8599bd8SSage Weil * MDS has been safely committed. 2624a8599bd8SSage Weil */ 26256df058c0SSage Weil static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid, 2626a8599bd8SSage Weil struct ceph_mds_caps *m, 2627a8599bd8SSage Weil struct ceph_mds_session *session, 2628a8599bd8SSage Weil struct ceph_cap *cap) 2629be655596SSage Weil __releases(ci->i_ceph_lock) 2630a8599bd8SSage Weil { 2631a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 26323d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 2633a8599bd8SSage Weil unsigned seq = le32_to_cpu(m->seq); 2634a8599bd8SSage Weil int dirty = le32_to_cpu(m->dirty); 2635a8599bd8SSage Weil int cleaned = 0; 2636afcdaea3SSage Weil int drop = 0; 2637a8599bd8SSage Weil int i; 2638a8599bd8SSage Weil 2639a8599bd8SSage Weil for (i = 0; i < CEPH_CAP_BITS; i++) 2640a8599bd8SSage Weil if ((dirty & (1 << i)) && 26413231300bSYan, Zheng (u16)flush_tid == ci->i_cap_flush_tid[i]) 2642a8599bd8SSage Weil cleaned |= 1 << i; 2643a8599bd8SSage Weil 2644a8599bd8SSage Weil dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s," 2645a8599bd8SSage Weil " flushing %s -> %s\n", 2646a8599bd8SSage Weil inode, session->s_mds, seq, ceph_cap_string(dirty), 2647a8599bd8SSage Weil ceph_cap_string(cleaned), ceph_cap_string(ci->i_flushing_caps), 2648a8599bd8SSage Weil ceph_cap_string(ci->i_flushing_caps & ~cleaned)); 2649a8599bd8SSage Weil 2650a8599bd8SSage Weil if (ci->i_flushing_caps == (ci->i_flushing_caps & ~cleaned)) 2651a8599bd8SSage Weil goto out; 2652a8599bd8SSage Weil 2653a8599bd8SSage Weil ci->i_flushing_caps &= ~cleaned; 2654a8599bd8SSage Weil 2655a8599bd8SSage Weil spin_lock(&mdsc->cap_dirty_lock); 2656a8599bd8SSage Weil if (ci->i_flushing_caps == 0) { 2657a8599bd8SSage Weil list_del_init(&ci->i_flushing_item); 2658a8599bd8SSage Weil if (!list_empty(&session->s_cap_flushing)) 2659a8599bd8SSage Weil dout(" mds%d still flushing cap on %p\n", 2660a8599bd8SSage Weil session->s_mds, 2661a8599bd8SSage Weil &list_entry(session->s_cap_flushing.next, 2662a8599bd8SSage Weil struct ceph_inode_info, 2663a8599bd8SSage Weil i_flushing_item)->vfs_inode); 2664a8599bd8SSage Weil mdsc->num_cap_flushing--; 266503066f23SYehuda Sadeh wake_up_all(&mdsc->cap_flushing_wq); 2666a8599bd8SSage Weil dout(" inode %p now !flushing\n", inode); 2667afcdaea3SSage Weil 2668afcdaea3SSage Weil if (ci->i_dirty_caps == 0) { 2669a8599bd8SSage Weil dout(" inode %p now clean\n", inode); 2670afcdaea3SSage Weil BUG_ON(!list_empty(&ci->i_dirty_item)); 2671afcdaea3SSage Weil drop = 1; 26727d8cb26dSSage Weil if (ci->i_wrbuffer_ref_head == 0) { 26737d8cb26dSSage Weil BUG_ON(!ci->i_head_snapc); 26747d8cb26dSSage Weil ceph_put_snap_context(ci->i_head_snapc); 26757d8cb26dSSage Weil ci->i_head_snapc = NULL; 26767d8cb26dSSage Weil } 267776e3b390SSage Weil } else { 267876e3b390SSage Weil BUG_ON(list_empty(&ci->i_dirty_item)); 2679afcdaea3SSage Weil } 2680a8599bd8SSage Weil } 2681a8599bd8SSage Weil spin_unlock(&mdsc->cap_dirty_lock); 268203066f23SYehuda Sadeh wake_up_all(&ci->i_cap_wq); 2683a8599bd8SSage Weil 2684a8599bd8SSage Weil out: 2685be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2686afcdaea3SSage Weil if (drop) 2687a8599bd8SSage Weil iput(inode); 2688a8599bd8SSage Weil } 2689a8599bd8SSage Weil 2690a8599bd8SSage Weil /* 2691a8599bd8SSage Weil * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can 2692a8599bd8SSage Weil * throw away our cap_snap. 2693a8599bd8SSage Weil * 2694a8599bd8SSage Weil * Caller hold s_mutex. 2695a8599bd8SSage Weil */ 26966df058c0SSage Weil static void handle_cap_flushsnap_ack(struct inode *inode, u64 flush_tid, 2697a8599bd8SSage Weil struct ceph_mds_caps *m, 2698a8599bd8SSage Weil struct ceph_mds_session *session) 2699a8599bd8SSage Weil { 2700a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 2701a8599bd8SSage Weil u64 follows = le64_to_cpu(m->snap_follows); 2702a8599bd8SSage Weil struct ceph_cap_snap *capsnap; 2703a8599bd8SSage Weil int drop = 0; 2704a8599bd8SSage Weil 2705a8599bd8SSage Weil dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n", 2706a8599bd8SSage Weil inode, ci, session->s_mds, follows); 2707a8599bd8SSage Weil 2708be655596SSage Weil spin_lock(&ci->i_ceph_lock); 2709a8599bd8SSage Weil list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { 2710a8599bd8SSage Weil if (capsnap->follows == follows) { 2711a8599bd8SSage Weil if (capsnap->flush_tid != flush_tid) { 2712a8599bd8SSage Weil dout(" cap_snap %p follows %lld tid %lld !=" 2713a8599bd8SSage Weil " %lld\n", capsnap, follows, 2714a8599bd8SSage Weil flush_tid, capsnap->flush_tid); 2715a8599bd8SSage Weil break; 2716a8599bd8SSage Weil } 2717a8599bd8SSage Weil WARN_ON(capsnap->dirty_pages || capsnap->writing); 2718819ccbfaSSage Weil dout(" removing %p cap_snap %p follows %lld\n", 2719819ccbfaSSage Weil inode, capsnap, follows); 2720a8599bd8SSage Weil ceph_put_snap_context(capsnap->context); 2721a8599bd8SSage Weil list_del(&capsnap->ci_item); 2722a8599bd8SSage Weil list_del(&capsnap->flushing_item); 2723a8599bd8SSage Weil ceph_put_cap_snap(capsnap); 2724a8599bd8SSage Weil drop = 1; 2725a8599bd8SSage Weil break; 2726a8599bd8SSage Weil } else { 2727a8599bd8SSage Weil dout(" skipping cap_snap %p follows %lld\n", 2728a8599bd8SSage Weil capsnap, capsnap->follows); 2729a8599bd8SSage Weil } 2730a8599bd8SSage Weil } 2731be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2732a8599bd8SSage Weil if (drop) 2733a8599bd8SSage Weil iput(inode); 2734a8599bd8SSage Weil } 2735a8599bd8SSage Weil 2736a8599bd8SSage Weil /* 2737a8599bd8SSage Weil * Handle TRUNC from MDS, indicating file truncation. 2738a8599bd8SSage Weil * 2739a8599bd8SSage Weil * caller hold s_mutex. 2740a8599bd8SSage Weil */ 2741a8599bd8SSage Weil static void handle_cap_trunc(struct inode *inode, 2742a8599bd8SSage Weil struct ceph_mds_caps *trunc, 2743a8599bd8SSage Weil struct ceph_mds_session *session) 2744be655596SSage Weil __releases(ci->i_ceph_lock) 2745a8599bd8SSage Weil { 2746a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 2747a8599bd8SSage Weil int mds = session->s_mds; 2748a8599bd8SSage Weil int seq = le32_to_cpu(trunc->seq); 2749a8599bd8SSage Weil u32 truncate_seq = le32_to_cpu(trunc->truncate_seq); 2750a8599bd8SSage Weil u64 truncate_size = le64_to_cpu(trunc->truncate_size); 2751a8599bd8SSage Weil u64 size = le64_to_cpu(trunc->size); 2752a8599bd8SSage Weil int implemented = 0; 2753a8599bd8SSage Weil int dirty = __ceph_caps_dirty(ci); 2754a8599bd8SSage Weil int issued = __ceph_caps_issued(ceph_inode(inode), &implemented); 2755a8599bd8SSage Weil int queue_trunc = 0; 2756a8599bd8SSage Weil 2757a8599bd8SSage Weil issued |= implemented | dirty; 2758a8599bd8SSage Weil 2759a8599bd8SSage Weil dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n", 2760a8599bd8SSage Weil inode, mds, seq, truncate_size, truncate_seq); 2761a8599bd8SSage Weil queue_trunc = ceph_fill_file_size(inode, issued, 2762a8599bd8SSage Weil truncate_seq, truncate_size, size); 2763be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2764a8599bd8SSage Weil 276599ccbd22SMilosz Tanski if (queue_trunc) { 27663c6f6b79SSage Weil ceph_queue_vmtruncate(inode); 276799ccbd22SMilosz Tanski ceph_fscache_invalidate(inode); 276899ccbd22SMilosz Tanski } 2769a8599bd8SSage Weil } 2770a8599bd8SSage Weil 2771a8599bd8SSage Weil /* 2772a8599bd8SSage Weil * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a 2773a8599bd8SSage Weil * different one. If we are the most recent migration we've seen (as 2774a8599bd8SSage Weil * indicated by mseq), make note of the migrating cap bits for the 2775a8599bd8SSage Weil * duration (until we see the corresponding IMPORT). 2776a8599bd8SSage Weil * 2777a8599bd8SSage Weil * caller holds s_mutex 2778a8599bd8SSage Weil */ 2779a8599bd8SSage Weil static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex, 278011df2dfbSYan, Zheng struct ceph_mds_cap_peer *ph, 278111df2dfbSYan, Zheng struct ceph_mds_session *session) 2782a8599bd8SSage Weil { 2783db354052SSage Weil struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; 278411df2dfbSYan, Zheng struct ceph_mds_session *tsession = NULL; 2785d9df2783SYan, Zheng struct ceph_cap *cap, *tcap, *new_cap = NULL; 2786a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 278711df2dfbSYan, Zheng u64 t_cap_id; 2788a8599bd8SSage Weil unsigned mseq = le32_to_cpu(ex->migrate_seq); 278911df2dfbSYan, Zheng unsigned t_seq, t_mseq; 279011df2dfbSYan, Zheng int target, issued; 279111df2dfbSYan, Zheng int mds = session->s_mds; 2792a8599bd8SSage Weil 279311df2dfbSYan, Zheng if (ph) { 279411df2dfbSYan, Zheng t_cap_id = le64_to_cpu(ph->cap_id); 279511df2dfbSYan, Zheng t_seq = le32_to_cpu(ph->seq); 279611df2dfbSYan, Zheng t_mseq = le32_to_cpu(ph->mseq); 279711df2dfbSYan, Zheng target = le32_to_cpu(ph->mds); 279811df2dfbSYan, Zheng } else { 279911df2dfbSYan, Zheng t_cap_id = t_seq = t_mseq = 0; 280011df2dfbSYan, Zheng target = -1; 280111df2dfbSYan, Zheng } 2802a8599bd8SSage Weil 280311df2dfbSYan, Zheng dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n", 280411df2dfbSYan, Zheng inode, ci, mds, mseq, target); 280511df2dfbSYan, Zheng retry: 2806be655596SSage Weil spin_lock(&ci->i_ceph_lock); 280711df2dfbSYan, Zheng cap = __get_cap_for_mds(ci, mds); 2808ca665e02SYan, Zheng if (!cap || cap->cap_id != le64_to_cpu(ex->cap_id)) 280911df2dfbSYan, Zheng goto out_unlock; 2810a8599bd8SSage Weil 281111df2dfbSYan, Zheng if (target < 0) { 281211df2dfbSYan, Zheng __ceph_remove_cap(cap, false); 281311df2dfbSYan, Zheng goto out_unlock; 2814a8599bd8SSage Weil } 2815a8599bd8SSage Weil 2816154f42c2SSage Weil /* 281711df2dfbSYan, Zheng * now we know we haven't received the cap import message yet 281811df2dfbSYan, Zheng * because the exported cap still exist. 2819154f42c2SSage Weil */ 2820db354052SSage Weil 282111df2dfbSYan, Zheng issued = cap->issued; 282211df2dfbSYan, Zheng WARN_ON(issued != cap->implemented); 282311df2dfbSYan, Zheng 282411df2dfbSYan, Zheng tcap = __get_cap_for_mds(ci, target); 282511df2dfbSYan, Zheng if (tcap) { 282611df2dfbSYan, Zheng /* already have caps from the target */ 282711df2dfbSYan, Zheng if (tcap->cap_id != t_cap_id || 282811df2dfbSYan, Zheng ceph_seq_cmp(tcap->seq, t_seq) < 0) { 282911df2dfbSYan, Zheng dout(" updating import cap %p mds%d\n", tcap, target); 283011df2dfbSYan, Zheng tcap->cap_id = t_cap_id; 283111df2dfbSYan, Zheng tcap->seq = t_seq - 1; 283211df2dfbSYan, Zheng tcap->issue_seq = t_seq - 1; 283311df2dfbSYan, Zheng tcap->mseq = t_mseq; 283411df2dfbSYan, Zheng tcap->issued |= issued; 283511df2dfbSYan, Zheng tcap->implemented |= issued; 283611df2dfbSYan, Zheng if (cap == ci->i_auth_cap) 283711df2dfbSYan, Zheng ci->i_auth_cap = tcap; 283811df2dfbSYan, Zheng if (ci->i_flushing_caps && ci->i_auth_cap == tcap) { 2839db354052SSage Weil spin_lock(&mdsc->cap_dirty_lock); 284011df2dfbSYan, Zheng list_move_tail(&ci->i_flushing_item, 284111df2dfbSYan, Zheng &tcap->session->s_cap_flushing); 2842db354052SSage Weil spin_unlock(&mdsc->cap_dirty_lock); 2843a8599bd8SSage Weil } 2844a8599bd8SSage Weil } 284511df2dfbSYan, Zheng __ceph_remove_cap(cap, false); 284611df2dfbSYan, Zheng goto out_unlock; 2847d9df2783SYan, Zheng } else if (tsession) { 284811df2dfbSYan, Zheng /* add placeholder for the export tagert */ 2849d9df2783SYan, Zheng int flag = (cap == ci->i_auth_cap) ? CEPH_CAP_FLAG_AUTH : 0; 285011df2dfbSYan, Zheng ceph_add_cap(inode, tsession, t_cap_id, -1, issued, 0, 2851d9df2783SYan, Zheng t_seq - 1, t_mseq, (u64)-1, flag, &new_cap); 2852d9df2783SYan, Zheng 2853d9df2783SYan, Zheng __ceph_remove_cap(cap, false); 2854d9df2783SYan, Zheng goto out_unlock; 285511df2dfbSYan, Zheng } 2856a8599bd8SSage Weil 2857be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 285811df2dfbSYan, Zheng mutex_unlock(&session->s_mutex); 285911df2dfbSYan, Zheng 286011df2dfbSYan, Zheng /* open target session */ 286111df2dfbSYan, Zheng tsession = ceph_mdsc_open_export_target_session(mdsc, target); 286211df2dfbSYan, Zheng if (!IS_ERR(tsession)) { 286311df2dfbSYan, Zheng if (mds > target) { 286411df2dfbSYan, Zheng mutex_lock(&session->s_mutex); 286511df2dfbSYan, Zheng mutex_lock_nested(&tsession->s_mutex, 286611df2dfbSYan, Zheng SINGLE_DEPTH_NESTING); 286711df2dfbSYan, Zheng } else { 286811df2dfbSYan, Zheng mutex_lock(&tsession->s_mutex); 286911df2dfbSYan, Zheng mutex_lock_nested(&session->s_mutex, 287011df2dfbSYan, Zheng SINGLE_DEPTH_NESTING); 287111df2dfbSYan, Zheng } 287211df2dfbSYan, Zheng ceph_add_cap_releases(mdsc, tsession); 2873d9df2783SYan, Zheng new_cap = ceph_get_cap(mdsc, NULL); 287411df2dfbSYan, Zheng } else { 287511df2dfbSYan, Zheng WARN_ON(1); 287611df2dfbSYan, Zheng tsession = NULL; 287711df2dfbSYan, Zheng target = -1; 287811df2dfbSYan, Zheng } 287911df2dfbSYan, Zheng goto retry; 288011df2dfbSYan, Zheng 288111df2dfbSYan, Zheng out_unlock: 288211df2dfbSYan, Zheng spin_unlock(&ci->i_ceph_lock); 288311df2dfbSYan, Zheng mutex_unlock(&session->s_mutex); 288411df2dfbSYan, Zheng if (tsession) { 288511df2dfbSYan, Zheng mutex_unlock(&tsession->s_mutex); 288611df2dfbSYan, Zheng ceph_put_mds_session(tsession); 288711df2dfbSYan, Zheng } 2888d9df2783SYan, Zheng if (new_cap) 2889d9df2783SYan, Zheng ceph_put_cap(mdsc, new_cap); 2890a8599bd8SSage Weil } 2891a8599bd8SSage Weil 2892a8599bd8SSage Weil /* 28932cd698beSYan, Zheng * Handle cap IMPORT. 2894a8599bd8SSage Weil * 28952cd698beSYan, Zheng * caller holds s_mutex. acquires i_ceph_lock 2896a8599bd8SSage Weil */ 2897a8599bd8SSage Weil static void handle_cap_import(struct ceph_mds_client *mdsc, 2898a8599bd8SSage Weil struct inode *inode, struct ceph_mds_caps *im, 28994ee6a914SYan, Zheng struct ceph_mds_cap_peer *ph, 2900a8599bd8SSage Weil struct ceph_mds_session *session, 29012cd698beSYan, Zheng struct ceph_cap **target_cap, int *old_issued) 29022cd698beSYan, Zheng __acquires(ci->i_ceph_lock) 2903a8599bd8SSage Weil { 2904a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 29052cd698beSYan, Zheng struct ceph_cap *cap, *ocap, *new_cap = NULL; 2906a8599bd8SSage Weil int mds = session->s_mds; 29072cd698beSYan, Zheng int issued; 29082cd698beSYan, Zheng unsigned caps = le32_to_cpu(im->caps); 2909a8599bd8SSage Weil unsigned wanted = le32_to_cpu(im->wanted); 2910a8599bd8SSage Weil unsigned seq = le32_to_cpu(im->seq); 2911a8599bd8SSage Weil unsigned mseq = le32_to_cpu(im->migrate_seq); 2912a8599bd8SSage Weil u64 realmino = le64_to_cpu(im->realm); 2913a8599bd8SSage Weil u64 cap_id = le64_to_cpu(im->cap_id); 29144ee6a914SYan, Zheng u64 p_cap_id; 29154ee6a914SYan, Zheng int peer; 2916a8599bd8SSage Weil 29174ee6a914SYan, Zheng if (ph) { 29184ee6a914SYan, Zheng p_cap_id = le64_to_cpu(ph->cap_id); 29194ee6a914SYan, Zheng peer = le32_to_cpu(ph->mds); 2920a8599bd8SSage Weil } else { 29214ee6a914SYan, Zheng p_cap_id = 0; 29224ee6a914SYan, Zheng peer = -1; 2923a8599bd8SSage Weil } 2924a8599bd8SSage Weil 29254ee6a914SYan, Zheng dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n", 29264ee6a914SYan, Zheng inode, ci, mds, mseq, peer); 29274ee6a914SYan, Zheng 2928d9df2783SYan, Zheng retry: 29294ee6a914SYan, Zheng spin_lock(&ci->i_ceph_lock); 2930d9df2783SYan, Zheng cap = __get_cap_for_mds(ci, mds); 2931d9df2783SYan, Zheng if (!cap) { 2932d9df2783SYan, Zheng if (!new_cap) { 2933d9df2783SYan, Zheng spin_unlock(&ci->i_ceph_lock); 2934d9df2783SYan, Zheng new_cap = ceph_get_cap(mdsc, NULL); 2935d9df2783SYan, Zheng goto retry; 2936d9df2783SYan, Zheng } 29372cd698beSYan, Zheng cap = new_cap; 29382cd698beSYan, Zheng } else { 29392cd698beSYan, Zheng if (new_cap) { 29402cd698beSYan, Zheng ceph_put_cap(mdsc, new_cap); 29412cd698beSYan, Zheng new_cap = NULL; 29422cd698beSYan, Zheng } 2943d9df2783SYan, Zheng } 2944d9df2783SYan, Zheng 29452cd698beSYan, Zheng __ceph_caps_issued(ci, &issued); 29462cd698beSYan, Zheng issued |= __ceph_caps_dirty(ci); 29472cd698beSYan, Zheng 29482cd698beSYan, Zheng ceph_add_cap(inode, session, cap_id, -1, caps, wanted, seq, mseq, 2949d9df2783SYan, Zheng realmino, CEPH_CAP_FLAG_AUTH, &new_cap); 2950d9df2783SYan, Zheng 29512cd698beSYan, Zheng ocap = peer >= 0 ? __get_cap_for_mds(ci, peer) : NULL; 29522cd698beSYan, Zheng if (ocap && ocap->cap_id == p_cap_id) { 29534ee6a914SYan, Zheng dout(" remove export cap %p mds%d flags %d\n", 29542cd698beSYan, Zheng ocap, peer, ph->flags); 29554ee6a914SYan, Zheng if ((ph->flags & CEPH_CAP_FLAG_AUTH) && 29562cd698beSYan, Zheng (ocap->seq != le32_to_cpu(ph->seq) || 29572cd698beSYan, Zheng ocap->mseq != le32_to_cpu(ph->mseq))) { 29584ee6a914SYan, Zheng pr_err("handle_cap_import: mismatched seq/mseq: " 29594ee6a914SYan, Zheng "ino (%llx.%llx) mds%d seq %d mseq %d " 29604ee6a914SYan, Zheng "importer mds%d has peer seq %d mseq %d\n", 29612cd698beSYan, Zheng ceph_vinop(inode), peer, ocap->seq, 29622cd698beSYan, Zheng ocap->mseq, mds, le32_to_cpu(ph->seq), 29634ee6a914SYan, Zheng le32_to_cpu(ph->mseq)); 29644ee6a914SYan, Zheng } 29652cd698beSYan, Zheng __ceph_remove_cap(ocap, (ph->flags & CEPH_CAP_FLAG_RELEASE)); 29664ee6a914SYan, Zheng } 29674ee6a914SYan, Zheng 29684ee6a914SYan, Zheng /* make sure we re-request max_size, if necessary */ 29694ee6a914SYan, Zheng ci->i_wanted_max_size = 0; 29704ee6a914SYan, Zheng ci->i_requested_max_size = 0; 29714ee6a914SYan, Zheng 29722cd698beSYan, Zheng *old_issued = issued; 29732cd698beSYan, Zheng *target_cap = cap; 2974a8599bd8SSage Weil } 2975a8599bd8SSage Weil 2976a8599bd8SSage Weil /* 2977a8599bd8SSage Weil * Handle a caps message from the MDS. 2978a8599bd8SSage Weil * 2979a8599bd8SSage Weil * Identify the appropriate session, inode, and call the right handler 2980a8599bd8SSage Weil * based on the cap op. 2981a8599bd8SSage Weil */ 2982a8599bd8SSage Weil void ceph_handle_caps(struct ceph_mds_session *session, 2983a8599bd8SSage Weil struct ceph_msg *msg) 2984a8599bd8SSage Weil { 2985a8599bd8SSage Weil struct ceph_mds_client *mdsc = session->s_mdsc; 29863d14c5d2SYehuda Sadeh struct super_block *sb = mdsc->fsc->sb; 2987a8599bd8SSage Weil struct inode *inode; 2988be655596SSage Weil struct ceph_inode_info *ci; 2989a8599bd8SSage Weil struct ceph_cap *cap; 2990a8599bd8SSage Weil struct ceph_mds_caps *h; 29914ee6a914SYan, Zheng struct ceph_mds_cap_peer *peer = NULL; 29922600d2ddSSage Weil int mds = session->s_mds; 29932cd698beSYan, Zheng int op, issued; 29943d7ded4dSSage Weil u32 seq, mseq; 2995a8599bd8SSage Weil struct ceph_vino vino; 2996a8599bd8SSage Weil u64 cap_id; 2997a8599bd8SSage Weil u64 size, max_size; 29986df058c0SSage Weil u64 tid; 299970edb55bSSage Weil void *snaptrace; 3000ce1fbc8dSSage Weil size_t snaptrace_len; 3001ce1fbc8dSSage Weil void *flock; 30024ee6a914SYan, Zheng void *end; 3003ce1fbc8dSSage Weil u32 flock_len; 3004a8599bd8SSage Weil 3005a8599bd8SSage Weil dout("handle_caps from mds%d\n", mds); 3006a8599bd8SSage Weil 3007a8599bd8SSage Weil /* decode */ 30084ee6a914SYan, Zheng end = msg->front.iov_base + msg->front.iov_len; 30096df058c0SSage Weil tid = le64_to_cpu(msg->hdr.tid); 3010a8599bd8SSage Weil if (msg->front.iov_len < sizeof(*h)) 3011a8599bd8SSage Weil goto bad; 3012a8599bd8SSage Weil h = msg->front.iov_base; 3013a8599bd8SSage Weil op = le32_to_cpu(h->op); 3014a8599bd8SSage Weil vino.ino = le64_to_cpu(h->ino); 3015a8599bd8SSage Weil vino.snap = CEPH_NOSNAP; 3016a8599bd8SSage Weil cap_id = le64_to_cpu(h->cap_id); 3017a8599bd8SSage Weil seq = le32_to_cpu(h->seq); 30183d7ded4dSSage Weil mseq = le32_to_cpu(h->migrate_seq); 3019a8599bd8SSage Weil size = le64_to_cpu(h->size); 3020a8599bd8SSage Weil max_size = le64_to_cpu(h->max_size); 3021a8599bd8SSage Weil 3022ce1fbc8dSSage Weil snaptrace = h + 1; 3023ce1fbc8dSSage Weil snaptrace_len = le32_to_cpu(h->snap_trace_len); 3024ce1fbc8dSSage Weil 3025ce1fbc8dSSage Weil if (le16_to_cpu(msg->hdr.version) >= 2) { 30264ee6a914SYan, Zheng void *p = snaptrace + snaptrace_len; 3027ce1fbc8dSSage Weil ceph_decode_32_safe(&p, end, flock_len, bad); 30284ee6a914SYan, Zheng if (p + flock_len > end) 30294ee6a914SYan, Zheng goto bad; 3030ce1fbc8dSSage Weil flock = p; 3031ce1fbc8dSSage Weil } else { 3032ce1fbc8dSSage Weil flock = NULL; 3033ce1fbc8dSSage Weil flock_len = 0; 3034ce1fbc8dSSage Weil } 3035ce1fbc8dSSage Weil 30364ee6a914SYan, Zheng if (le16_to_cpu(msg->hdr.version) >= 3) { 30374ee6a914SYan, Zheng if (op == CEPH_CAP_OP_IMPORT) { 30384ee6a914SYan, Zheng void *p = flock + flock_len; 30394ee6a914SYan, Zheng if (p + sizeof(*peer) > end) 30404ee6a914SYan, Zheng goto bad; 30414ee6a914SYan, Zheng peer = p; 304211df2dfbSYan, Zheng } else if (op == CEPH_CAP_OP_EXPORT) { 304311df2dfbSYan, Zheng /* recorded in unused fields */ 304411df2dfbSYan, Zheng peer = (void *)&h->size; 30454ee6a914SYan, Zheng } 30464ee6a914SYan, Zheng } 30474ee6a914SYan, Zheng 30486cd3bcadSYan, Zheng /* lookup ino */ 30496cd3bcadSYan, Zheng inode = ceph_find_inode(sb, vino); 30506cd3bcadSYan, Zheng ci = ceph_inode(inode); 30516cd3bcadSYan, Zheng dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op), vino.ino, 30526cd3bcadSYan, Zheng vino.snap, inode); 30536cd3bcadSYan, Zheng 3054a8599bd8SSage Weil mutex_lock(&session->s_mutex); 3055a8599bd8SSage Weil session->s_seq++; 3056a8599bd8SSage Weil dout(" mds%d seq %lld cap seq %u\n", session->s_mds, session->s_seq, 3057a8599bd8SSage Weil (unsigned)seq); 3058a8599bd8SSage Weil 305966f58691SYan, Zheng if (op == CEPH_CAP_OP_IMPORT) 306066f58691SYan, Zheng ceph_add_cap_releases(mdsc, session); 306166f58691SYan, Zheng 3062a8599bd8SSage Weil if (!inode) { 3063a8599bd8SSage Weil dout(" i don't have ino %llx\n", vino.ino); 30643d7ded4dSSage Weil 3065a096b09aSYan, Zheng if (op == CEPH_CAP_OP_IMPORT) { 3066a096b09aSYan, Zheng spin_lock(&session->s_cap_lock); 30673d7ded4dSSage Weil __queue_cap_release(session, vino.ino, cap_id, 30683d7ded4dSSage Weil mseq, seq); 3069a096b09aSYan, Zheng spin_unlock(&session->s_cap_lock); 3070a096b09aSYan, Zheng } 307121b559deSGreg Farnum goto flush_cap_releases; 3072a8599bd8SSage Weil } 3073a8599bd8SSage Weil 3074a8599bd8SSage Weil /* these will work even if we don't have a cap yet */ 3075a8599bd8SSage Weil switch (op) { 3076a8599bd8SSage Weil case CEPH_CAP_OP_FLUSHSNAP_ACK: 30776df058c0SSage Weil handle_cap_flushsnap_ack(inode, tid, h, session); 3078a8599bd8SSage Weil goto done; 3079a8599bd8SSage Weil 3080a8599bd8SSage Weil case CEPH_CAP_OP_EXPORT: 308111df2dfbSYan, Zheng handle_cap_export(inode, h, peer, session); 308211df2dfbSYan, Zheng goto done_unlocked; 3083a8599bd8SSage Weil 3084a8599bd8SSage Weil case CEPH_CAP_OP_IMPORT: 30854ee6a914SYan, Zheng handle_cap_import(mdsc, inode, h, peer, session, 30862cd698beSYan, Zheng &cap, &issued); 30872cd698beSYan, Zheng handle_cap_grant(mdsc, inode, h, snaptrace, snaptrace_len, 30882cd698beSYan, Zheng msg->middle, session, cap, issued); 30892cd698beSYan, Zheng goto done_unlocked; 3090a8599bd8SSage Weil } 3091a8599bd8SSage Weil 3092a8599bd8SSage Weil /* the rest require a cap */ 3093be655596SSage Weil spin_lock(&ci->i_ceph_lock); 3094a8599bd8SSage Weil cap = __get_cap_for_mds(ceph_inode(inode), mds); 3095a8599bd8SSage Weil if (!cap) { 30969dbd412fSSage Weil dout(" no cap on %p ino %llx.%llx from mds%d\n", 3097a8599bd8SSage Weil inode, ceph_ino(inode), ceph_snap(inode), mds); 3098be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 309921b559deSGreg Farnum goto flush_cap_releases; 3100a8599bd8SSage Weil } 3101a8599bd8SSage Weil 3102be655596SSage Weil /* note that each of these drops i_ceph_lock for us */ 3103a8599bd8SSage Weil switch (op) { 3104a8599bd8SSage Weil case CEPH_CAP_OP_REVOKE: 3105a8599bd8SSage Weil case CEPH_CAP_OP_GRANT: 31062cd698beSYan, Zheng __ceph_caps_issued(ci, &issued); 31072cd698beSYan, Zheng issued |= __ceph_caps_dirty(ci); 31082cd698beSYan, Zheng handle_cap_grant(mdsc, inode, h, NULL, 0, msg->middle, 31092cd698beSYan, Zheng session, cap, issued); 311015637c8bSSage Weil goto done_unlocked; 3111a8599bd8SSage Weil 3112a8599bd8SSage Weil case CEPH_CAP_OP_FLUSH_ACK: 31136df058c0SSage Weil handle_cap_flush_ack(inode, tid, h, session, cap); 3114a8599bd8SSage Weil break; 3115a8599bd8SSage Weil 3116a8599bd8SSage Weil case CEPH_CAP_OP_TRUNC: 3117a8599bd8SSage Weil handle_cap_trunc(inode, h, session); 3118a8599bd8SSage Weil break; 3119a8599bd8SSage Weil 3120a8599bd8SSage Weil default: 3121be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 3122a8599bd8SSage Weil pr_err("ceph_handle_caps: unknown cap op %d %s\n", op, 3123a8599bd8SSage Weil ceph_cap_op_name(op)); 3124a8599bd8SSage Weil } 3125a8599bd8SSage Weil 312621b559deSGreg Farnum goto done; 312721b559deSGreg Farnum 312821b559deSGreg Farnum flush_cap_releases: 312921b559deSGreg Farnum /* 313021b559deSGreg Farnum * send any full release message to try to move things 313121b559deSGreg Farnum * along for the mds (who clearly thinks we still have this 313221b559deSGreg Farnum * cap). 313321b559deSGreg Farnum */ 313421b559deSGreg Farnum ceph_add_cap_releases(mdsc, session); 313521b559deSGreg Farnum ceph_send_cap_releases(mdsc, session); 313621b559deSGreg Farnum 3137a8599bd8SSage Weil done: 3138a8599bd8SSage Weil mutex_unlock(&session->s_mutex); 313915637c8bSSage Weil done_unlocked: 3140a8599bd8SSage Weil if (inode) 3141a8599bd8SSage Weil iput(inode); 3142a8599bd8SSage Weil return; 3143a8599bd8SSage Weil 3144a8599bd8SSage Weil bad: 3145a8599bd8SSage Weil pr_err("ceph_handle_caps: corrupt message\n"); 31469ec7cab1SSage Weil ceph_msg_dump(msg); 3147a8599bd8SSage Weil return; 3148a8599bd8SSage Weil } 3149a8599bd8SSage Weil 3150a8599bd8SSage Weil /* 3151a8599bd8SSage Weil * Delayed work handler to process end of delayed cap release LRU list. 3152a8599bd8SSage Weil */ 3153afcdaea3SSage Weil void ceph_check_delayed_caps(struct ceph_mds_client *mdsc) 3154a8599bd8SSage Weil { 3155a8599bd8SSage Weil struct ceph_inode_info *ci; 3156a8599bd8SSage Weil int flags = CHECK_CAPS_NODELAY; 3157a8599bd8SSage Weil 3158a8599bd8SSage Weil dout("check_delayed_caps\n"); 3159a8599bd8SSage Weil while (1) { 3160a8599bd8SSage Weil spin_lock(&mdsc->cap_delay_lock); 3161a8599bd8SSage Weil if (list_empty(&mdsc->cap_delay_list)) 3162a8599bd8SSage Weil break; 3163a8599bd8SSage Weil ci = list_first_entry(&mdsc->cap_delay_list, 3164a8599bd8SSage Weil struct ceph_inode_info, 3165a8599bd8SSage Weil i_cap_delay_list); 3166a8599bd8SSage Weil if ((ci->i_ceph_flags & CEPH_I_FLUSH) == 0 && 3167a8599bd8SSage Weil time_before(jiffies, ci->i_hold_caps_max)) 3168a8599bd8SSage Weil break; 3169a8599bd8SSage Weil list_del_init(&ci->i_cap_delay_list); 3170a8599bd8SSage Weil spin_unlock(&mdsc->cap_delay_lock); 3171a8599bd8SSage Weil dout("check_delayed_caps on %p\n", &ci->vfs_inode); 3172a8599bd8SSage Weil ceph_check_caps(ci, flags, NULL); 3173a8599bd8SSage Weil } 3174a8599bd8SSage Weil spin_unlock(&mdsc->cap_delay_lock); 3175a8599bd8SSage Weil } 3176a8599bd8SSage Weil 3177a8599bd8SSage Weil /* 3178afcdaea3SSage Weil * Flush all dirty caps to the mds 3179afcdaea3SSage Weil */ 3180afcdaea3SSage Weil void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc) 3181afcdaea3SSage Weil { 3182db354052SSage Weil struct ceph_inode_info *ci; 3183db354052SSage Weil struct inode *inode; 3184afcdaea3SSage Weil 3185afcdaea3SSage Weil dout("flush_dirty_caps\n"); 3186afcdaea3SSage Weil spin_lock(&mdsc->cap_dirty_lock); 3187db354052SSage Weil while (!list_empty(&mdsc->cap_dirty)) { 3188db354052SSage Weil ci = list_first_entry(&mdsc->cap_dirty, struct ceph_inode_info, 3189afcdaea3SSage Weil i_dirty_item); 319070b666c3SSage Weil inode = &ci->vfs_inode; 319170b666c3SSage Weil ihold(inode); 3192db354052SSage Weil dout("flush_dirty_caps %p\n", inode); 3193afcdaea3SSage Weil spin_unlock(&mdsc->cap_dirty_lock); 319470b666c3SSage Weil ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_FLUSH, NULL); 3195afcdaea3SSage Weil iput(inode); 3196afcdaea3SSage Weil spin_lock(&mdsc->cap_dirty_lock); 3197afcdaea3SSage Weil } 3198afcdaea3SSage Weil spin_unlock(&mdsc->cap_dirty_lock); 3199db354052SSage Weil dout("flush_dirty_caps done\n"); 3200afcdaea3SSage Weil } 3201afcdaea3SSage Weil 3202afcdaea3SSage Weil /* 3203a8599bd8SSage Weil * Drop open file reference. If we were the last open file, 3204a8599bd8SSage Weil * we may need to release capabilities to the MDS (or schedule 3205a8599bd8SSage Weil * their delayed release). 3206a8599bd8SSage Weil */ 3207a8599bd8SSage Weil void ceph_put_fmode(struct ceph_inode_info *ci, int fmode) 3208a8599bd8SSage Weil { 3209a8599bd8SSage Weil struct inode *inode = &ci->vfs_inode; 3210a8599bd8SSage Weil int last = 0; 3211a8599bd8SSage Weil 3212be655596SSage Weil spin_lock(&ci->i_ceph_lock); 3213a8599bd8SSage Weil dout("put_fmode %p fmode %d %d -> %d\n", inode, fmode, 3214a8599bd8SSage Weil ci->i_nr_by_mode[fmode], ci->i_nr_by_mode[fmode]-1); 3215a8599bd8SSage Weil BUG_ON(ci->i_nr_by_mode[fmode] == 0); 3216a8599bd8SSage Weil if (--ci->i_nr_by_mode[fmode] == 0) 3217a8599bd8SSage Weil last++; 3218be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 3219a8599bd8SSage Weil 3220a8599bd8SSage Weil if (last && ci->i_vino.snap == CEPH_NOSNAP) 3221a8599bd8SSage Weil ceph_check_caps(ci, 0, NULL); 3222a8599bd8SSage Weil } 3223a8599bd8SSage Weil 3224a8599bd8SSage Weil /* 3225a8599bd8SSage Weil * Helpers for embedding cap and dentry lease releases into mds 3226a8599bd8SSage Weil * requests. 3227a8599bd8SSage Weil * 3228a8599bd8SSage Weil * @force is used by dentry_release (below) to force inclusion of a 3229a8599bd8SSage Weil * record for the directory inode, even when there aren't any caps to 3230a8599bd8SSage Weil * drop. 3231a8599bd8SSage Weil */ 3232a8599bd8SSage Weil int ceph_encode_inode_release(void **p, struct inode *inode, 3233a8599bd8SSage Weil int mds, int drop, int unless, int force) 3234a8599bd8SSage Weil { 3235a8599bd8SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 3236a8599bd8SSage Weil struct ceph_cap *cap; 3237a8599bd8SSage Weil struct ceph_mds_request_release *rel = *p; 3238ec97f88bSSage Weil int used, dirty; 3239a8599bd8SSage Weil int ret = 0; 3240a8599bd8SSage Weil 3241be655596SSage Weil spin_lock(&ci->i_ceph_lock); 3242916623daSSage Weil used = __ceph_caps_used(ci); 3243ec97f88bSSage Weil dirty = __ceph_caps_dirty(ci); 3244916623daSSage Weil 3245ec97f88bSSage Weil dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n", 3246ec97f88bSSage Weil inode, mds, ceph_cap_string(used|dirty), ceph_cap_string(drop), 3247916623daSSage Weil ceph_cap_string(unless)); 3248916623daSSage Weil 3249ec97f88bSSage Weil /* only drop unused, clean caps */ 3250ec97f88bSSage Weil drop &= ~(used | dirty); 3251916623daSSage Weil 3252a8599bd8SSage Weil cap = __get_cap_for_mds(ci, mds); 3253a8599bd8SSage Weil if (cap && __cap_is_valid(cap)) { 3254a8599bd8SSage Weil if (force || 3255a8599bd8SSage Weil ((cap->issued & drop) && 3256a8599bd8SSage Weil (cap->issued & unless) == 0)) { 3257a8599bd8SSage Weil if ((cap->issued & drop) && 3258a8599bd8SSage Weil (cap->issued & unless) == 0) { 3259bb137f84SYan, Zheng int wanted = __ceph_caps_wanted(ci); 3260bb137f84SYan, Zheng if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0) 3261bb137f84SYan, Zheng wanted |= cap->mds_wanted; 3262bb137f84SYan, Zheng dout("encode_inode_release %p cap %p " 3263bb137f84SYan, Zheng "%s -> %s, wanted %s -> %s\n", inode, cap, 3264a8599bd8SSage Weil ceph_cap_string(cap->issued), 3265bb137f84SYan, Zheng ceph_cap_string(cap->issued & ~drop), 3266bb137f84SYan, Zheng ceph_cap_string(cap->mds_wanted), 3267bb137f84SYan, Zheng ceph_cap_string(wanted)); 3268bb137f84SYan, Zheng 3269a8599bd8SSage Weil cap->issued &= ~drop; 3270a8599bd8SSage Weil cap->implemented &= ~drop; 3271bb137f84SYan, Zheng cap->mds_wanted = wanted; 3272a8599bd8SSage Weil } else { 3273a8599bd8SSage Weil dout("encode_inode_release %p cap %p %s" 3274a8599bd8SSage Weil " (force)\n", inode, cap, 3275a8599bd8SSage Weil ceph_cap_string(cap->issued)); 3276a8599bd8SSage Weil } 3277a8599bd8SSage Weil 3278a8599bd8SSage Weil rel->ino = cpu_to_le64(ceph_ino(inode)); 3279a8599bd8SSage Weil rel->cap_id = cpu_to_le64(cap->cap_id); 3280a8599bd8SSage Weil rel->seq = cpu_to_le32(cap->seq); 328108a0f24eSHimangi Saraogi rel->issue_seq = cpu_to_le32(cap->issue_seq); 3282a8599bd8SSage Weil rel->mseq = cpu_to_le32(cap->mseq); 3283fd7b95cdSYan, Zheng rel->caps = cpu_to_le32(cap->implemented); 3284a8599bd8SSage Weil rel->wanted = cpu_to_le32(cap->mds_wanted); 3285a8599bd8SSage Weil rel->dname_len = 0; 3286a8599bd8SSage Weil rel->dname_seq = 0; 3287a8599bd8SSage Weil *p += sizeof(*rel); 3288a8599bd8SSage Weil ret = 1; 3289a8599bd8SSage Weil } else { 3290a8599bd8SSage Weil dout("encode_inode_release %p cap %p %s\n", 3291a8599bd8SSage Weil inode, cap, ceph_cap_string(cap->issued)); 3292a8599bd8SSage Weil } 3293a8599bd8SSage Weil } 3294be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 3295a8599bd8SSage Weil return ret; 3296a8599bd8SSage Weil } 3297a8599bd8SSage Weil 3298a8599bd8SSage Weil int ceph_encode_dentry_release(void **p, struct dentry *dentry, 3299a8599bd8SSage Weil int mds, int drop, int unless) 3300a8599bd8SSage Weil { 3301a8599bd8SSage Weil struct inode *dir = dentry->d_parent->d_inode; 3302a8599bd8SSage Weil struct ceph_mds_request_release *rel = *p; 3303a8599bd8SSage Weil struct ceph_dentry_info *di = ceph_dentry(dentry); 3304a8599bd8SSage Weil int force = 0; 3305a8599bd8SSage Weil int ret; 3306a8599bd8SSage Weil 3307a8599bd8SSage Weil /* 3308a8599bd8SSage Weil * force an record for the directory caps if we have a dentry lease. 3309be655596SSage Weil * this is racy (can't take i_ceph_lock and d_lock together), but it 3310a8599bd8SSage Weil * doesn't have to be perfect; the mds will revoke anything we don't 3311a8599bd8SSage Weil * release. 3312a8599bd8SSage Weil */ 3313a8599bd8SSage Weil spin_lock(&dentry->d_lock); 3314a8599bd8SSage Weil if (di->lease_session && di->lease_session->s_mds == mds) 3315a8599bd8SSage Weil force = 1; 3316a8599bd8SSage Weil spin_unlock(&dentry->d_lock); 3317a8599bd8SSage Weil 3318a8599bd8SSage Weil ret = ceph_encode_inode_release(p, dir, mds, drop, unless, force); 3319a8599bd8SSage Weil 3320a8599bd8SSage Weil spin_lock(&dentry->d_lock); 3321a8599bd8SSage Weil if (ret && di->lease_session && di->lease_session->s_mds == mds) { 3322a8599bd8SSage Weil dout("encode_dentry_release %p mds%d seq %d\n", 3323a8599bd8SSage Weil dentry, mds, (int)di->lease_seq); 3324a8599bd8SSage Weil rel->dname_len = cpu_to_le32(dentry->d_name.len); 3325a8599bd8SSage Weil memcpy(*p, dentry->d_name.name, dentry->d_name.len); 3326a8599bd8SSage Weil *p += dentry->d_name.len; 3327a8599bd8SSage Weil rel->dname_seq = cpu_to_le32(di->lease_seq); 33281dadcce3SSage Weil __ceph_mdsc_drop_dentry_lease(dentry); 3329a8599bd8SSage Weil } 3330a8599bd8SSage Weil spin_unlock(&dentry->d_lock); 3331a8599bd8SSage Weil return ret; 3332a8599bd8SSage Weil } 3333