1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 23d14c5d2SYehuda Sadeh #include <linux/ceph/ceph_debug.h> 3355da1ebSSage Weil 4355da1ebSSage Weil #include <linux/module.h> 5355da1ebSSage Weil #include <linux/fs.h> 6355da1ebSSage Weil #include <linux/slab.h> 7355da1ebSSage Weil #include <linux/string.h> 8355da1ebSSage Weil #include <linux/uaccess.h> 9355da1ebSSage Weil #include <linux/kernel.h> 10355da1ebSSage Weil #include <linux/writeback.h> 11355da1ebSSage Weil #include <linux/vmalloc.h> 122cdeb1e4SAndreas Gruenbacher #include <linux/xattr.h> 134db658eaSLinus Torvalds #include <linux/posix_acl.h> 143e7fbe9cSYan, Zheng #include <linux/random.h> 15a407846eSYan, Zheng #include <linux/sort.h> 16355da1ebSSage Weil 17355da1ebSSage Weil #include "super.h" 183d14c5d2SYehuda Sadeh #include "mds_client.h" 1999ccbd22SMilosz Tanski #include "cache.h" 203d14c5d2SYehuda Sadeh #include <linux/ceph/decode.h> 21355da1ebSSage Weil 22355da1ebSSage Weil /* 23355da1ebSSage Weil * Ceph inode operations 24355da1ebSSage Weil * 25355da1ebSSage Weil * Implement basic inode helpers (get, alloc) and inode ops (getattr, 26355da1ebSSage Weil * setattr, etc.), xattr helpers, and helpers for assimilating 27355da1ebSSage Weil * metadata returned by the MDS into our cache. 28355da1ebSSage Weil * 29355da1ebSSage Weil * Also define helpers for doing asynchronous writeback, invalidation, 30355da1ebSSage Weil * and truncation for the benefit of those who can't afford to block 31355da1ebSSage Weil * (typically because they are in the message handler path). 32355da1ebSSage Weil */ 33355da1ebSSage Weil 34355da1ebSSage Weil static const struct inode_operations ceph_symlink_iops; 35355da1ebSSage Weil 363c6f6b79SSage Weil static void ceph_invalidate_work(struct work_struct *work); 373c6f6b79SSage Weil static void ceph_writeback_work(struct work_struct *work); 383c6f6b79SSage Weil static void ceph_vmtruncate_work(struct work_struct *work); 39355da1ebSSage Weil 40355da1ebSSage Weil /* 41355da1ebSSage Weil * find or create an inode, given the ceph ino number 42355da1ebSSage Weil */ 43ad1fee96SYehuda Sadeh static int ceph_set_ino_cb(struct inode *inode, void *data) 44ad1fee96SYehuda Sadeh { 45ad1fee96SYehuda Sadeh ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; 46ad1fee96SYehuda Sadeh inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); 47ad1fee96SYehuda Sadeh return 0; 48ad1fee96SYehuda Sadeh } 49ad1fee96SYehuda Sadeh 50355da1ebSSage Weil struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) 51355da1ebSSage Weil { 52355da1ebSSage Weil struct inode *inode; 53355da1ebSSage Weil ino_t t = ceph_vino_to_ino(vino); 54355da1ebSSage Weil 55355da1ebSSage Weil inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); 56d37b1d99SMarkus Elfring if (!inode) 57355da1ebSSage Weil return ERR_PTR(-ENOMEM); 58355da1ebSSage Weil if (inode->i_state & I_NEW) { 59355da1ebSSage Weil dout("get_inode created new inode %p %llx.%llx ino %llx\n", 60355da1ebSSage Weil inode, ceph_vinop(inode), (u64)inode->i_ino); 61355da1ebSSage Weil unlock_new_inode(inode); 62355da1ebSSage Weil } 63355da1ebSSage Weil 64355da1ebSSage Weil dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, 65355da1ebSSage Weil vino.snap, inode); 66355da1ebSSage Weil return inode; 67355da1ebSSage Weil } 68355da1ebSSage Weil 69355da1ebSSage Weil /* 70355da1ebSSage Weil * get/constuct snapdir inode for a given directory 71355da1ebSSage Weil */ 72355da1ebSSage Weil struct inode *ceph_get_snapdir(struct inode *parent) 73355da1ebSSage Weil { 74355da1ebSSage Weil struct ceph_vino vino = { 75355da1ebSSage Weil .ino = ceph_ino(parent), 76355da1ebSSage Weil .snap = CEPH_SNAPDIR, 77355da1ebSSage Weil }; 78355da1ebSSage Weil struct inode *inode = ceph_get_inode(parent->i_sb, vino); 79b377ff13SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 80355da1ebSSage Weil 81355da1ebSSage Weil BUG_ON(!S_ISDIR(parent->i_mode)); 82355da1ebSSage Weil if (IS_ERR(inode)) 837e34bc52SJulia Lawall return inode; 84355da1ebSSage Weil inode->i_mode = parent->i_mode; 85355da1ebSSage Weil inode->i_uid = parent->i_uid; 86355da1ebSSage Weil inode->i_gid = parent->i_gid; 8738c48b5fSYan, Zheng inode->i_op = &ceph_snapdir_iops; 8838c48b5fSYan, Zheng inode->i_fop = &ceph_snapdir_fops; 89b377ff13SSage Weil ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ 90b377ff13SSage Weil ci->i_rbytes = 0; 91355da1ebSSage Weil return inode; 92355da1ebSSage Weil } 93355da1ebSSage Weil 94355da1ebSSage Weil const struct inode_operations ceph_file_iops = { 95355da1ebSSage Weil .permission = ceph_permission, 96355da1ebSSage Weil .setattr = ceph_setattr, 97355da1ebSSage Weil .getattr = ceph_getattr, 98355da1ebSSage Weil .listxattr = ceph_listxattr, 997221fe4cSGuangliang Zhao .get_acl = ceph_get_acl, 10072466d0bSSage Weil .set_acl = ceph_set_acl, 101355da1ebSSage Weil }; 102355da1ebSSage Weil 103355da1ebSSage Weil 104355da1ebSSage Weil /* 105355da1ebSSage Weil * We use a 'frag tree' to keep track of the MDS's directory fragments 106355da1ebSSage Weil * for a given inode (usually there is just a single fragment). We 107355da1ebSSage Weil * need to know when a child frag is delegated to a new MDS, or when 108355da1ebSSage Weil * it is flagged as replicated, so we can direct our requests 109355da1ebSSage Weil * accordingly. 110355da1ebSSage Weil */ 111355da1ebSSage Weil 112355da1ebSSage Weil /* 113355da1ebSSage Weil * find/create a frag in the tree 114355da1ebSSage Weil */ 115355da1ebSSage Weil static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, 116355da1ebSSage Weil u32 f) 117355da1ebSSage Weil { 118355da1ebSSage Weil struct rb_node **p; 119355da1ebSSage Weil struct rb_node *parent = NULL; 120355da1ebSSage Weil struct ceph_inode_frag *frag; 121355da1ebSSage Weil int c; 122355da1ebSSage Weil 123355da1ebSSage Weil p = &ci->i_fragtree.rb_node; 124355da1ebSSage Weil while (*p) { 125355da1ebSSage Weil parent = *p; 126355da1ebSSage Weil frag = rb_entry(parent, struct ceph_inode_frag, node); 127355da1ebSSage Weil c = ceph_frag_compare(f, frag->frag); 128355da1ebSSage Weil if (c < 0) 129355da1ebSSage Weil p = &(*p)->rb_left; 130355da1ebSSage Weil else if (c > 0) 131355da1ebSSage Weil p = &(*p)->rb_right; 132355da1ebSSage Weil else 133355da1ebSSage Weil return frag; 134355da1ebSSage Weil } 135355da1ebSSage Weil 136355da1ebSSage Weil frag = kmalloc(sizeof(*frag), GFP_NOFS); 13751308806SMarkus Elfring if (!frag) 138355da1ebSSage Weil return ERR_PTR(-ENOMEM); 13951308806SMarkus Elfring 140355da1ebSSage Weil frag->frag = f; 141355da1ebSSage Weil frag->split_by = 0; 142355da1ebSSage Weil frag->mds = -1; 143355da1ebSSage Weil frag->ndist = 0; 144355da1ebSSage Weil 145355da1ebSSage Weil rb_link_node(&frag->node, parent, p); 146355da1ebSSage Weil rb_insert_color(&frag->node, &ci->i_fragtree); 147355da1ebSSage Weil 148355da1ebSSage Weil dout("get_or_create_frag added %llx.%llx frag %x\n", 149355da1ebSSage Weil ceph_vinop(&ci->vfs_inode), f); 150355da1ebSSage Weil return frag; 151355da1ebSSage Weil } 152355da1ebSSage Weil 153355da1ebSSage Weil /* 154355da1ebSSage Weil * find a specific frag @f 155355da1ebSSage Weil */ 156355da1ebSSage Weil struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) 157355da1ebSSage Weil { 158355da1ebSSage Weil struct rb_node *n = ci->i_fragtree.rb_node; 159355da1ebSSage Weil 160355da1ebSSage Weil while (n) { 161355da1ebSSage Weil struct ceph_inode_frag *frag = 162355da1ebSSage Weil rb_entry(n, struct ceph_inode_frag, node); 163355da1ebSSage Weil int c = ceph_frag_compare(f, frag->frag); 164355da1ebSSage Weil if (c < 0) 165355da1ebSSage Weil n = n->rb_left; 166355da1ebSSage Weil else if (c > 0) 167355da1ebSSage Weil n = n->rb_right; 168355da1ebSSage Weil else 169355da1ebSSage Weil return frag; 170355da1ebSSage Weil } 171355da1ebSSage Weil return NULL; 172355da1ebSSage Weil } 173355da1ebSSage Weil 174355da1ebSSage Weil /* 175355da1ebSSage Weil * Choose frag containing the given value @v. If @pfrag is 176355da1ebSSage Weil * specified, copy the frag delegation info to the caller if 177355da1ebSSage Weil * it is present. 178355da1ebSSage Weil */ 1793e7fbe9cSYan, Zheng static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 1803e7fbe9cSYan, Zheng struct ceph_inode_frag *pfrag, int *found) 181355da1ebSSage Weil { 182355da1ebSSage Weil u32 t = ceph_frag_make(0, 0); 183355da1ebSSage Weil struct ceph_inode_frag *frag; 184355da1ebSSage Weil unsigned nway, i; 185355da1ebSSage Weil u32 n; 186355da1ebSSage Weil 187355da1ebSSage Weil if (found) 188355da1ebSSage Weil *found = 0; 189355da1ebSSage Weil 190355da1ebSSage Weil while (1) { 191355da1ebSSage Weil WARN_ON(!ceph_frag_contains_value(t, v)); 192355da1ebSSage Weil frag = __ceph_find_frag(ci, t); 193355da1ebSSage Weil if (!frag) 194355da1ebSSage Weil break; /* t is a leaf */ 195355da1ebSSage Weil if (frag->split_by == 0) { 196355da1ebSSage Weil if (pfrag) 197355da1ebSSage Weil memcpy(pfrag, frag, sizeof(*pfrag)); 198355da1ebSSage Weil if (found) 199355da1ebSSage Weil *found = 1; 200355da1ebSSage Weil break; 201355da1ebSSage Weil } 202355da1ebSSage Weil 203355da1ebSSage Weil /* choose child */ 204355da1ebSSage Weil nway = 1 << frag->split_by; 205355da1ebSSage Weil dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, 206355da1ebSSage Weil frag->split_by, nway); 207355da1ebSSage Weil for (i = 0; i < nway; i++) { 208355da1ebSSage Weil n = ceph_frag_make_child(t, frag->split_by, i); 209355da1ebSSage Weil if (ceph_frag_contains_value(n, v)) { 210355da1ebSSage Weil t = n; 211355da1ebSSage Weil break; 212355da1ebSSage Weil } 213355da1ebSSage Weil } 214355da1ebSSage Weil BUG_ON(i == nway); 215355da1ebSSage Weil } 216355da1ebSSage Weil dout("choose_frag(%x) = %x\n", v, t); 217355da1ebSSage Weil 218355da1ebSSage Weil return t; 219355da1ebSSage Weil } 220355da1ebSSage Weil 2213e7fbe9cSYan, Zheng u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 2223e7fbe9cSYan, Zheng struct ceph_inode_frag *pfrag, int *found) 2233e7fbe9cSYan, Zheng { 2243e7fbe9cSYan, Zheng u32 ret; 2253e7fbe9cSYan, Zheng mutex_lock(&ci->i_fragtree_mutex); 2263e7fbe9cSYan, Zheng ret = __ceph_choose_frag(ci, v, pfrag, found); 2273e7fbe9cSYan, Zheng mutex_unlock(&ci->i_fragtree_mutex); 2283e7fbe9cSYan, Zheng return ret; 2293e7fbe9cSYan, Zheng } 2303e7fbe9cSYan, Zheng 231355da1ebSSage Weil /* 232355da1ebSSage Weil * Process dirfrag (delegation) info from the mds. Include leaf 233355da1ebSSage Weil * fragment in tree ONLY if ndist > 0. Otherwise, only 234355da1ebSSage Weil * branches/splits are included in i_fragtree) 235355da1ebSSage Weil */ 236355da1ebSSage Weil static int ceph_fill_dirfrag(struct inode *inode, 237355da1ebSSage Weil struct ceph_mds_reply_dirfrag *dirinfo) 238355da1ebSSage Weil { 239355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 240355da1ebSSage Weil struct ceph_inode_frag *frag; 241355da1ebSSage Weil u32 id = le32_to_cpu(dirinfo->frag); 242355da1ebSSage Weil int mds = le32_to_cpu(dirinfo->auth); 243355da1ebSSage Weil int ndist = le32_to_cpu(dirinfo->ndist); 2448d08503cSYan, Zheng int diri_auth = -1; 245355da1ebSSage Weil int i; 246355da1ebSSage Weil int err = 0; 247355da1ebSSage Weil 2488d08503cSYan, Zheng spin_lock(&ci->i_ceph_lock); 2498d08503cSYan, Zheng if (ci->i_auth_cap) 2508d08503cSYan, Zheng diri_auth = ci->i_auth_cap->mds; 2518d08503cSYan, Zheng spin_unlock(&ci->i_ceph_lock); 2528d08503cSYan, Zheng 25342172119SYan, Zheng if (mds == -1) /* CDIR_AUTH_PARENT */ 25442172119SYan, Zheng mds = diri_auth; 25542172119SYan, Zheng 256355da1ebSSage Weil mutex_lock(&ci->i_fragtree_mutex); 2578d08503cSYan, Zheng if (ndist == 0 && mds == diri_auth) { 258355da1ebSSage Weil /* no delegation info needed. */ 259355da1ebSSage Weil frag = __ceph_find_frag(ci, id); 260355da1ebSSage Weil if (!frag) 261355da1ebSSage Weil goto out; 262355da1ebSSage Weil if (frag->split_by == 0) { 263355da1ebSSage Weil /* tree leaf, remove */ 264355da1ebSSage Weil dout("fill_dirfrag removed %llx.%llx frag %x" 265355da1ebSSage Weil " (no ref)\n", ceph_vinop(inode), id); 266355da1ebSSage Weil rb_erase(&frag->node, &ci->i_fragtree); 267355da1ebSSage Weil kfree(frag); 268355da1ebSSage Weil } else { 269355da1ebSSage Weil /* tree branch, keep and clear */ 270355da1ebSSage Weil dout("fill_dirfrag cleared %llx.%llx frag %x" 271355da1ebSSage Weil " referral\n", ceph_vinop(inode), id); 272355da1ebSSage Weil frag->mds = -1; 273355da1ebSSage Weil frag->ndist = 0; 274355da1ebSSage Weil } 275355da1ebSSage Weil goto out; 276355da1ebSSage Weil } 277355da1ebSSage Weil 278355da1ebSSage Weil 279355da1ebSSage Weil /* find/add this frag to store mds delegation info */ 280355da1ebSSage Weil frag = __get_or_create_frag(ci, id); 281355da1ebSSage Weil if (IS_ERR(frag)) { 282355da1ebSSage Weil /* this is not the end of the world; we can continue 283355da1ebSSage Weil with bad/inaccurate delegation info */ 284355da1ebSSage Weil pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", 285355da1ebSSage Weil ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); 286355da1ebSSage Weil err = -ENOMEM; 287355da1ebSSage Weil goto out; 288355da1ebSSage Weil } 289355da1ebSSage Weil 290355da1ebSSage Weil frag->mds = mds; 291355da1ebSSage Weil frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); 292355da1ebSSage Weil for (i = 0; i < frag->ndist; i++) 293355da1ebSSage Weil frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); 294355da1ebSSage Weil dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", 295355da1ebSSage Weil ceph_vinop(inode), frag->frag, frag->ndist); 296355da1ebSSage Weil 297355da1ebSSage Weil out: 298355da1ebSSage Weil mutex_unlock(&ci->i_fragtree_mutex); 299355da1ebSSage Weil return err; 300355da1ebSSage Weil } 301355da1ebSSage Weil 302a407846eSYan, Zheng static int frag_tree_split_cmp(const void *l, const void *r) 303a407846eSYan, Zheng { 304a407846eSYan, Zheng struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; 305a407846eSYan, Zheng struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; 306fe2ed425SJeff Layton return ceph_frag_compare(le32_to_cpu(ls->frag), 307fe2ed425SJeff Layton le32_to_cpu(rs->frag)); 308a407846eSYan, Zheng } 309a407846eSYan, Zheng 310a4b7431fSYan, Zheng static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) 311a4b7431fSYan, Zheng { 312a4b7431fSYan, Zheng if (!frag) 313a4b7431fSYan, Zheng return f == ceph_frag_make(0, 0); 314a4b7431fSYan, Zheng if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) 315a4b7431fSYan, Zheng return false; 316a4b7431fSYan, Zheng return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); 317a4b7431fSYan, Zheng } 318a4b7431fSYan, Zheng 3193e7fbe9cSYan, Zheng static int ceph_fill_fragtree(struct inode *inode, 3203e7fbe9cSYan, Zheng struct ceph_frag_tree_head *fragtree, 3213e7fbe9cSYan, Zheng struct ceph_mds_reply_dirfrag *dirinfo) 3223e7fbe9cSYan, Zheng { 3233e7fbe9cSYan, Zheng struct ceph_inode_info *ci = ceph_inode(inode); 324a4b7431fSYan, Zheng struct ceph_inode_frag *frag, *prev_frag = NULL; 3253e7fbe9cSYan, Zheng struct rb_node *rb_node; 3261b1bc16dSYan, Zheng unsigned i, split_by, nsplits; 3271b1bc16dSYan, Zheng u32 id; 3283e7fbe9cSYan, Zheng bool update = false; 3293e7fbe9cSYan, Zheng 3303e7fbe9cSYan, Zheng mutex_lock(&ci->i_fragtree_mutex); 3313e7fbe9cSYan, Zheng nsplits = le32_to_cpu(fragtree->nsplits); 3321b1bc16dSYan, Zheng if (nsplits != ci->i_fragtree_nsplits) { 3331b1bc16dSYan, Zheng update = true; 3341b1bc16dSYan, Zheng } else if (nsplits) { 3353e7fbe9cSYan, Zheng i = prandom_u32() % nsplits; 3363e7fbe9cSYan, Zheng id = le32_to_cpu(fragtree->splits[i].frag); 3373e7fbe9cSYan, Zheng if (!__ceph_find_frag(ci, id)) 3383e7fbe9cSYan, Zheng update = true; 3393e7fbe9cSYan, Zheng } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { 3403e7fbe9cSYan, Zheng rb_node = rb_first(&ci->i_fragtree); 3413e7fbe9cSYan, Zheng frag = rb_entry(rb_node, struct ceph_inode_frag, node); 3423e7fbe9cSYan, Zheng if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) 3433e7fbe9cSYan, Zheng update = true; 3443e7fbe9cSYan, Zheng } 3453e7fbe9cSYan, Zheng if (!update && dirinfo) { 3463e7fbe9cSYan, Zheng id = le32_to_cpu(dirinfo->frag); 3473e7fbe9cSYan, Zheng if (id != __ceph_choose_frag(ci, id, NULL, NULL)) 3483e7fbe9cSYan, Zheng update = true; 3493e7fbe9cSYan, Zheng } 3503e7fbe9cSYan, Zheng if (!update) 3513e7fbe9cSYan, Zheng goto out_unlock; 3523e7fbe9cSYan, Zheng 353a407846eSYan, Zheng if (nsplits > 1) { 354a407846eSYan, Zheng sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), 355a407846eSYan, Zheng frag_tree_split_cmp, NULL); 356a407846eSYan, Zheng } 357a407846eSYan, Zheng 3583e7fbe9cSYan, Zheng dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode)); 3593e7fbe9cSYan, Zheng rb_node = rb_first(&ci->i_fragtree); 3603e7fbe9cSYan, Zheng for (i = 0; i < nsplits; i++) { 3613e7fbe9cSYan, Zheng id = le32_to_cpu(fragtree->splits[i].frag); 3621b1bc16dSYan, Zheng split_by = le32_to_cpu(fragtree->splits[i].by); 3631b1bc16dSYan, Zheng if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { 3641b1bc16dSYan, Zheng pr_err("fill_fragtree %llx.%llx invalid split %d/%u, " 3651b1bc16dSYan, Zheng "frag %x split by %d\n", ceph_vinop(inode), 3661b1bc16dSYan, Zheng i, nsplits, id, split_by); 3671b1bc16dSYan, Zheng continue; 3681b1bc16dSYan, Zheng } 3693e7fbe9cSYan, Zheng frag = NULL; 3703e7fbe9cSYan, Zheng while (rb_node) { 3713e7fbe9cSYan, Zheng frag = rb_entry(rb_node, struct ceph_inode_frag, node); 3723e7fbe9cSYan, Zheng if (ceph_frag_compare(frag->frag, id) >= 0) { 3733e7fbe9cSYan, Zheng if (frag->frag != id) 3743e7fbe9cSYan, Zheng frag = NULL; 3753e7fbe9cSYan, Zheng else 3763e7fbe9cSYan, Zheng rb_node = rb_next(rb_node); 3773e7fbe9cSYan, Zheng break; 3783e7fbe9cSYan, Zheng } 3793e7fbe9cSYan, Zheng rb_node = rb_next(rb_node); 380a4b7431fSYan, Zheng /* delete stale split/leaf node */ 381a4b7431fSYan, Zheng if (frag->split_by > 0 || 382a4b7431fSYan, Zheng !is_frag_child(frag->frag, prev_frag)) { 3833e7fbe9cSYan, Zheng rb_erase(&frag->node, &ci->i_fragtree); 3841b1bc16dSYan, Zheng if (frag->split_by > 0) 3851b1bc16dSYan, Zheng ci->i_fragtree_nsplits--; 3863e7fbe9cSYan, Zheng kfree(frag); 387a4b7431fSYan, Zheng } 3883e7fbe9cSYan, Zheng frag = NULL; 3893e7fbe9cSYan, Zheng } 3903e7fbe9cSYan, Zheng if (!frag) { 3913e7fbe9cSYan, Zheng frag = __get_or_create_frag(ci, id); 3923e7fbe9cSYan, Zheng if (IS_ERR(frag)) 3933e7fbe9cSYan, Zheng continue; 3943e7fbe9cSYan, Zheng } 3951b1bc16dSYan, Zheng if (frag->split_by == 0) 3961b1bc16dSYan, Zheng ci->i_fragtree_nsplits++; 3971b1bc16dSYan, Zheng frag->split_by = split_by; 3983e7fbe9cSYan, Zheng dout(" frag %x split by %d\n", frag->frag, frag->split_by); 399a4b7431fSYan, Zheng prev_frag = frag; 4003e7fbe9cSYan, Zheng } 4013e7fbe9cSYan, Zheng while (rb_node) { 4023e7fbe9cSYan, Zheng frag = rb_entry(rb_node, struct ceph_inode_frag, node); 4033e7fbe9cSYan, Zheng rb_node = rb_next(rb_node); 404a4b7431fSYan, Zheng /* delete stale split/leaf node */ 405a4b7431fSYan, Zheng if (frag->split_by > 0 || 406a4b7431fSYan, Zheng !is_frag_child(frag->frag, prev_frag)) { 4073e7fbe9cSYan, Zheng rb_erase(&frag->node, &ci->i_fragtree); 4081b1bc16dSYan, Zheng if (frag->split_by > 0) 4091b1bc16dSYan, Zheng ci->i_fragtree_nsplits--; 4103e7fbe9cSYan, Zheng kfree(frag); 4113e7fbe9cSYan, Zheng } 412a4b7431fSYan, Zheng } 4133e7fbe9cSYan, Zheng out_unlock: 4143e7fbe9cSYan, Zheng mutex_unlock(&ci->i_fragtree_mutex); 4153e7fbe9cSYan, Zheng return 0; 4163e7fbe9cSYan, Zheng } 417355da1ebSSage Weil 418355da1ebSSage Weil /* 419355da1ebSSage Weil * initialize a newly allocated inode. 420355da1ebSSage Weil */ 421355da1ebSSage Weil struct inode *ceph_alloc_inode(struct super_block *sb) 422355da1ebSSage Weil { 423355da1ebSSage Weil struct ceph_inode_info *ci; 424355da1ebSSage Weil int i; 425355da1ebSSage Weil 426355da1ebSSage Weil ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); 427355da1ebSSage Weil if (!ci) 428355da1ebSSage Weil return NULL; 429355da1ebSSage Weil 430355da1ebSSage Weil dout("alloc_inode %p\n", &ci->vfs_inode); 431355da1ebSSage Weil 432be655596SSage Weil spin_lock_init(&ci->i_ceph_lock); 433be655596SSage Weil 434355da1ebSSage Weil ci->i_version = 0; 43531c542a1SYan, Zheng ci->i_inline_version = 0; 436355da1ebSSage Weil ci->i_time_warp_seq = 0; 437355da1ebSSage Weil ci->i_ceph_flags = 0; 438fdd4e158SYan, Zheng atomic64_set(&ci->i_ordered_count, 1); 439fdd4e158SYan, Zheng atomic64_set(&ci->i_release_count, 1); 440fdd4e158SYan, Zheng atomic64_set(&ci->i_complete_seq[0], 0); 441fdd4e158SYan, Zheng atomic64_set(&ci->i_complete_seq[1], 0); 442355da1ebSSage Weil ci->i_symlink = NULL; 443355da1ebSSage Weil 444fb18a575SLuis Henriques ci->i_max_bytes = 0; 445fb18a575SLuis Henriques ci->i_max_files = 0; 446fb18a575SLuis Henriques 4476c0f3af7SSage Weil memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); 44830c156d9SYan, Zheng RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); 4496c0f3af7SSage Weil 450355da1ebSSage Weil ci->i_fragtree = RB_ROOT; 451355da1ebSSage Weil mutex_init(&ci->i_fragtree_mutex); 452355da1ebSSage Weil 453355da1ebSSage Weil ci->i_xattrs.blob = NULL; 454355da1ebSSage Weil ci->i_xattrs.prealloc_blob = NULL; 455355da1ebSSage Weil ci->i_xattrs.dirty = false; 456355da1ebSSage Weil ci->i_xattrs.index = RB_ROOT; 457355da1ebSSage Weil ci->i_xattrs.count = 0; 458355da1ebSSage Weil ci->i_xattrs.names_size = 0; 459355da1ebSSage Weil ci->i_xattrs.vals_size = 0; 460355da1ebSSage Weil ci->i_xattrs.version = 0; 461355da1ebSSage Weil ci->i_xattrs.index_version = 0; 462355da1ebSSage Weil 463355da1ebSSage Weil ci->i_caps = RB_ROOT; 464355da1ebSSage Weil ci->i_auth_cap = NULL; 465355da1ebSSage Weil ci->i_dirty_caps = 0; 466355da1ebSSage Weil ci->i_flushing_caps = 0; 467355da1ebSSage Weil INIT_LIST_HEAD(&ci->i_dirty_item); 468355da1ebSSage Weil INIT_LIST_HEAD(&ci->i_flushing_item); 469f66fd9f0SYan, Zheng ci->i_prealloc_cap_flush = NULL; 470e4500b5eSYan, Zheng INIT_LIST_HEAD(&ci->i_cap_flush_list); 471355da1ebSSage Weil init_waitqueue_head(&ci->i_cap_wq); 472355da1ebSSage Weil ci->i_hold_caps_min = 0; 473355da1ebSSage Weil ci->i_hold_caps_max = 0; 474355da1ebSSage Weil INIT_LIST_HEAD(&ci->i_cap_delay_list); 475355da1ebSSage Weil INIT_LIST_HEAD(&ci->i_cap_snaps); 476355da1ebSSage Weil ci->i_head_snapc = NULL; 477355da1ebSSage Weil ci->i_snap_caps = 0; 478355da1ebSSage Weil 479774a6a11SYan, Zheng for (i = 0; i < CEPH_FILE_MODE_BITS; i++) 480355da1ebSSage Weil ci->i_nr_by_mode[i] = 0; 481355da1ebSSage Weil 482b0d7c223SYan, Zheng mutex_init(&ci->i_truncate_mutex); 483355da1ebSSage Weil ci->i_truncate_seq = 0; 484355da1ebSSage Weil ci->i_truncate_size = 0; 485355da1ebSSage Weil ci->i_truncate_pending = 0; 486355da1ebSSage Weil 487355da1ebSSage Weil ci->i_max_size = 0; 488355da1ebSSage Weil ci->i_reported_size = 0; 489355da1ebSSage Weil ci->i_wanted_max_size = 0; 490355da1ebSSage Weil ci->i_requested_max_size = 0; 491355da1ebSSage Weil 492355da1ebSSage Weil ci->i_pin_ref = 0; 493355da1ebSSage Weil ci->i_rd_ref = 0; 494355da1ebSSage Weil ci->i_rdcache_ref = 0; 495355da1ebSSage Weil ci->i_wr_ref = 0; 496d3d0720dSHenry C Chang ci->i_wb_ref = 0; 497355da1ebSSage Weil ci->i_wrbuffer_ref = 0; 498355da1ebSSage Weil ci->i_wrbuffer_ref_head = 0; 49989aa5930SYan, Zheng atomic_set(&ci->i_filelock_ref, 0); 50097aeb6bfSYan, Zheng atomic_set(&ci->i_shared_gen, 0); 501355da1ebSSage Weil ci->i_rdcache_gen = 0; 502355da1ebSSage Weil ci->i_rdcache_revoking = 0; 503355da1ebSSage Weil 504355da1ebSSage Weil INIT_LIST_HEAD(&ci->i_unsafe_dirops); 50568cd5b4bSYan, Zheng INIT_LIST_HEAD(&ci->i_unsafe_iops); 506355da1ebSSage Weil spin_lock_init(&ci->i_unsafe_lock); 507355da1ebSSage Weil 508355da1ebSSage Weil ci->i_snap_realm = NULL; 509355da1ebSSage Weil INIT_LIST_HEAD(&ci->i_snap_realm_item); 510355da1ebSSage Weil INIT_LIST_HEAD(&ci->i_snap_flush_item); 511355da1ebSSage Weil 5123c6f6b79SSage Weil INIT_WORK(&ci->i_wb_work, ceph_writeback_work); 5133c6f6b79SSage Weil INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); 514355da1ebSSage Weil 515355da1ebSSage Weil INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); 516355da1ebSSage Weil 51799ccbd22SMilosz Tanski ceph_fscache_inode_init(ci); 51899ccbd22SMilosz Tanski 519355da1ebSSage Weil return &ci->vfs_inode; 520355da1ebSSage Weil } 521355da1ebSSage Weil 522fa0d7e3dSNick Piggin static void ceph_i_callback(struct rcu_head *head) 523fa0d7e3dSNick Piggin { 524fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 525fa0d7e3dSNick Piggin struct ceph_inode_info *ci = ceph_inode(inode); 526fa0d7e3dSNick Piggin 527fa0d7e3dSNick Piggin kmem_cache_free(ceph_inode_cachep, ci); 528fa0d7e3dSNick Piggin } 529fa0d7e3dSNick Piggin 530355da1ebSSage Weil void ceph_destroy_inode(struct inode *inode) 531355da1ebSSage Weil { 532355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 533355da1ebSSage Weil struct ceph_inode_frag *frag; 534355da1ebSSage Weil struct rb_node *n; 535355da1ebSSage Weil 536355da1ebSSage Weil dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); 537355da1ebSSage Weil 53899ccbd22SMilosz Tanski ceph_fscache_unregister_inode_cookie(ci); 53999ccbd22SMilosz Tanski 540355da1ebSSage Weil ceph_queue_caps_release(inode); 541355da1ebSSage Weil 542d557c48dSLuis Henriques if (__ceph_has_any_quota(ci)) 543d557c48dSLuis Henriques ceph_adjust_quota_realms_count(inode, false); 544d557c48dSLuis Henriques 5458b218b8aSSage Weil /* 5468b218b8aSSage Weil * we may still have a snap_realm reference if there are stray 547d9df2783SYan, Zheng * caps in i_snap_caps. 5488b218b8aSSage Weil */ 5498b218b8aSSage Weil if (ci->i_snap_realm) { 5508b218b8aSSage Weil struct ceph_mds_client *mdsc = 5513d14c5d2SYehuda Sadeh ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; 5528b218b8aSSage Weil struct ceph_snap_realm *realm = ci->i_snap_realm; 5538b218b8aSSage Weil 5548b218b8aSSage Weil dout(" dropping residual ref to snap realm %p\n", realm); 5558b218b8aSSage Weil spin_lock(&realm->inodes_with_caps_lock); 5568b218b8aSSage Weil list_del_init(&ci->i_snap_realm_item); 557e3161f17SLuis Henriques ci->i_snap_realm = NULL; 558e3161f17SLuis Henriques if (realm->ino == ci->i_vino.ino) 559e3161f17SLuis Henriques realm->inode = NULL; 5608b218b8aSSage Weil spin_unlock(&realm->inodes_with_caps_lock); 5618b218b8aSSage Weil ceph_put_snap_realm(mdsc, realm); 5628b218b8aSSage Weil } 5638b218b8aSSage Weil 564355da1ebSSage Weil kfree(ci->i_symlink); 565355da1ebSSage Weil while ((n = rb_first(&ci->i_fragtree)) != NULL) { 566355da1ebSSage Weil frag = rb_entry(n, struct ceph_inode_frag, node); 567355da1ebSSage Weil rb_erase(n, &ci->i_fragtree); 568355da1ebSSage Weil kfree(frag); 569355da1ebSSage Weil } 5701b1bc16dSYan, Zheng ci->i_fragtree_nsplits = 0; 571355da1ebSSage Weil 572355da1ebSSage Weil __ceph_destroy_xattrs(ci); 573b6c1d5b8SSage Weil if (ci->i_xattrs.blob) 574355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 575b6c1d5b8SSage Weil if (ci->i_xattrs.prealloc_blob) 576355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.prealloc_blob); 577355da1ebSSage Weil 578779fe0fbSYan, Zheng ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); 57930c156d9SYan, Zheng 580fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ceph_i_callback); 581355da1ebSSage Weil } 582355da1ebSSage Weil 5839f12bd11SYan, Zheng int ceph_drop_inode(struct inode *inode) 5849f12bd11SYan, Zheng { 5859f12bd11SYan, Zheng /* 5869f12bd11SYan, Zheng * Positve dentry and corresponding inode are always accompanied 5879f12bd11SYan, Zheng * in MDS reply. So no need to keep inode in the cache after 5889f12bd11SYan, Zheng * dropping all its aliases. 5899f12bd11SYan, Zheng */ 5909f12bd11SYan, Zheng return 1; 5919f12bd11SYan, Zheng } 5929f12bd11SYan, Zheng 593224a7542SYan, Zheng static inline blkcnt_t calc_inode_blocks(u64 size) 594224a7542SYan, Zheng { 595224a7542SYan, Zheng return (size + (1<<9) - 1) >> 9; 596224a7542SYan, Zheng } 597224a7542SYan, Zheng 598355da1ebSSage Weil /* 599355da1ebSSage Weil * Helpers to fill in size, ctime, mtime, and atime. We have to be 600355da1ebSSage Weil * careful because either the client or MDS may have more up to date 601355da1ebSSage Weil * info, depending on which capabilities are held, and whether 602355da1ebSSage Weil * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime 603355da1ebSSage Weil * and size are monotonically increasing, except when utimes() or 604355da1ebSSage Weil * truncate() increments the corresponding _seq values.) 605355da1ebSSage Weil */ 606355da1ebSSage Weil int ceph_fill_file_size(struct inode *inode, int issued, 607355da1ebSSage Weil u32 truncate_seq, u64 truncate_size, u64 size) 608355da1ebSSage Weil { 609355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 610355da1ebSSage Weil int queue_trunc = 0; 611355da1ebSSage Weil 612355da1ebSSage Weil if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || 613355da1ebSSage Weil (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { 614355da1ebSSage Weil dout("size %lld -> %llu\n", inode->i_size, size); 615a3d714c3SYan, Zheng if (size > 0 && S_ISDIR(inode->i_mode)) { 616a3d714c3SYan, Zheng pr_err("fill_file_size non-zero size for directory\n"); 617a3d714c3SYan, Zheng size = 0; 618a3d714c3SYan, Zheng } 61999c88e69SYan, Zheng i_size_write(inode, size); 620224a7542SYan, Zheng inode->i_blocks = calc_inode_blocks(size); 621355da1ebSSage Weil ci->i_reported_size = size; 622355da1ebSSage Weil if (truncate_seq != ci->i_truncate_seq) { 623355da1ebSSage Weil dout("truncate_seq %u -> %u\n", 624355da1ebSSage Weil ci->i_truncate_seq, truncate_seq); 625355da1ebSSage Weil ci->i_truncate_seq = truncate_seq; 626b0d7c223SYan, Zheng 627b0d7c223SYan, Zheng /* the MDS should have revoked these caps */ 628b0d7c223SYan, Zheng WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL | 629b0d7c223SYan, Zheng CEPH_CAP_FILE_RD | 630b0d7c223SYan, Zheng CEPH_CAP_FILE_WR | 631b0d7c223SYan, Zheng CEPH_CAP_FILE_LAZYIO)); 6323d497d85SYehuda Sadeh /* 6333d497d85SYehuda Sadeh * If we hold relevant caps, or in the case where we're 6343d497d85SYehuda Sadeh * not the only client referencing this file and we 6353d497d85SYehuda Sadeh * don't hold those caps, then we need to check whether 6363d497d85SYehuda Sadeh * the file is either opened or mmaped 6373d497d85SYehuda Sadeh */ 638b0d7c223SYan, Zheng if ((issued & (CEPH_CAP_FILE_CACHE| 639b0d7c223SYan, Zheng CEPH_CAP_FILE_BUFFER)) || 6403d497d85SYehuda Sadeh mapping_mapped(inode->i_mapping) || 6413d497d85SYehuda Sadeh __ceph_caps_file_wanted(ci)) { 642355da1ebSSage Weil ci->i_truncate_pending++; 643355da1ebSSage Weil queue_trunc = 1; 644355da1ebSSage Weil } 645355da1ebSSage Weil } 646355da1ebSSage Weil } 647355da1ebSSage Weil if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && 648355da1ebSSage Weil ci->i_truncate_size != truncate_size) { 649355da1ebSSage Weil dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, 650355da1ebSSage Weil truncate_size); 651355da1ebSSage Weil ci->i_truncate_size = truncate_size; 652355da1ebSSage Weil } 65399ccbd22SMilosz Tanski 65499ccbd22SMilosz Tanski if (queue_trunc) 65599ccbd22SMilosz Tanski ceph_fscache_invalidate(inode); 65699ccbd22SMilosz Tanski 657355da1ebSSage Weil return queue_trunc; 658355da1ebSSage Weil } 659355da1ebSSage Weil 660355da1ebSSage Weil void ceph_fill_file_time(struct inode *inode, int issued, 661355da1ebSSage Weil u64 time_warp_seq, struct timespec *ctime, 662355da1ebSSage Weil struct timespec *mtime, struct timespec *atime) 663355da1ebSSage Weil { 664355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 665355da1ebSSage Weil int warn = 0; 666355da1ebSSage Weil 667355da1ebSSage Weil if (issued & (CEPH_CAP_FILE_EXCL| 668355da1ebSSage Weil CEPH_CAP_FILE_WR| 669d8672d64SSage Weil CEPH_CAP_FILE_BUFFER| 670d8672d64SSage Weil CEPH_CAP_AUTH_EXCL| 671d8672d64SSage Weil CEPH_CAP_XATTR_EXCL)) { 672ffdeec7aSYan, Zheng if (ci->i_version == 0 || 673ffdeec7aSYan, Zheng timespec_compare(ctime, &inode->i_ctime) > 0) { 674355da1ebSSage Weil dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", 675355da1ebSSage Weil inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 676355da1ebSSage Weil ctime->tv_sec, ctime->tv_nsec); 677355da1ebSSage Weil inode->i_ctime = *ctime; 678355da1ebSSage Weil } 679ffdeec7aSYan, Zheng if (ci->i_version == 0 || 680ffdeec7aSYan, Zheng ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 681355da1ebSSage Weil /* the MDS did a utimes() */ 682355da1ebSSage Weil dout("mtime %ld.%09ld -> %ld.%09ld " 683355da1ebSSage Weil "tw %d -> %d\n", 684355da1ebSSage Weil inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 685355da1ebSSage Weil mtime->tv_sec, mtime->tv_nsec, 686355da1ebSSage Weil ci->i_time_warp_seq, (int)time_warp_seq); 687355da1ebSSage Weil 688355da1ebSSage Weil inode->i_mtime = *mtime; 689355da1ebSSage Weil inode->i_atime = *atime; 690355da1ebSSage Weil ci->i_time_warp_seq = time_warp_seq; 691355da1ebSSage Weil } else if (time_warp_seq == ci->i_time_warp_seq) { 692355da1ebSSage Weil /* nobody did utimes(); take the max */ 693355da1ebSSage Weil if (timespec_compare(mtime, &inode->i_mtime) > 0) { 694355da1ebSSage Weil dout("mtime %ld.%09ld -> %ld.%09ld inc\n", 695355da1ebSSage Weil inode->i_mtime.tv_sec, 696355da1ebSSage Weil inode->i_mtime.tv_nsec, 697355da1ebSSage Weil mtime->tv_sec, mtime->tv_nsec); 698355da1ebSSage Weil inode->i_mtime = *mtime; 699355da1ebSSage Weil } 700355da1ebSSage Weil if (timespec_compare(atime, &inode->i_atime) > 0) { 701355da1ebSSage Weil dout("atime %ld.%09ld -> %ld.%09ld inc\n", 702355da1ebSSage Weil inode->i_atime.tv_sec, 703355da1ebSSage Weil inode->i_atime.tv_nsec, 704355da1ebSSage Weil atime->tv_sec, atime->tv_nsec); 705355da1ebSSage Weil inode->i_atime = *atime; 706355da1ebSSage Weil } 707355da1ebSSage Weil } else if (issued & CEPH_CAP_FILE_EXCL) { 708355da1ebSSage Weil /* we did a utimes(); ignore mds values */ 709355da1ebSSage Weil } else { 710355da1ebSSage Weil warn = 1; 711355da1ebSSage Weil } 712355da1ebSSage Weil } else { 713d8672d64SSage Weil /* we have no write|excl caps; whatever the MDS says is true */ 714355da1ebSSage Weil if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 715355da1ebSSage Weil inode->i_ctime = *ctime; 716355da1ebSSage Weil inode->i_mtime = *mtime; 717355da1ebSSage Weil inode->i_atime = *atime; 718355da1ebSSage Weil ci->i_time_warp_seq = time_warp_seq; 719355da1ebSSage Weil } else { 720355da1ebSSage Weil warn = 1; 721355da1ebSSage Weil } 722355da1ebSSage Weil } 723355da1ebSSage Weil if (warn) /* time_warp_seq shouldn't go backwards */ 724355da1ebSSage Weil dout("%p mds time_warp_seq %llu < %u\n", 725355da1ebSSage Weil inode, time_warp_seq, ci->i_time_warp_seq); 726355da1ebSSage Weil } 727355da1ebSSage Weil 728355da1ebSSage Weil /* 729355da1ebSSage Weil * Populate an inode based on info from mds. May be called on new or 730355da1ebSSage Weil * existing inodes. 731355da1ebSSage Weil */ 73201deead0SYan, Zheng static int fill_inode(struct inode *inode, struct page *locked_page, 733355da1ebSSage Weil struct ceph_mds_reply_info_in *iinfo, 734355da1ebSSage Weil struct ceph_mds_reply_dirfrag *dirinfo, 735355da1ebSSage Weil struct ceph_mds_session *session, 736355da1ebSSage Weil unsigned long ttl_from, int cap_fmode, 737355da1ebSSage Weil struct ceph_cap_reservation *caps_reservation) 738355da1ebSSage Weil { 739d9df2783SYan, Zheng struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; 740355da1ebSSage Weil struct ceph_mds_reply_inode *info = iinfo->in; 741355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 7422af54a72SYan, Zheng int issued, new_issued, info_caps; 743355da1ebSSage Weil struct timespec mtime, atime, ctime; 744355da1ebSSage Weil struct ceph_buffer *xattr_blob = NULL; 745779fe0fbSYan, Zheng struct ceph_string *pool_ns = NULL; 746d9df2783SYan, Zheng struct ceph_cap *new_cap = NULL; 747355da1ebSSage Weil int err = 0; 748d9df2783SYan, Zheng bool wake = false; 749f98a128aSYan, Zheng bool queue_trunc = false; 750f98a128aSYan, Zheng bool new_version = false; 75131c542a1SYan, Zheng bool fill_inline = false; 752355da1ebSSage Weil 753355da1ebSSage Weil dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", 754355da1ebSSage Weil inode, ceph_vinop(inode), le64_to_cpu(info->version), 755355da1ebSSage Weil ci->i_version); 756355da1ebSSage Weil 7572af54a72SYan, Zheng info_caps = le32_to_cpu(info->cap.caps); 7582af54a72SYan, Zheng 759d9df2783SYan, Zheng /* prealloc new cap struct */ 7602af54a72SYan, Zheng if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) 761d9df2783SYan, Zheng new_cap = ceph_get_cap(mdsc, caps_reservation); 762d9df2783SYan, Zheng 763355da1ebSSage Weil /* 764355da1ebSSage Weil * prealloc xattr data, if it looks like we'll need it. only 765355da1ebSSage Weil * if len > 4 (meaning there are actually xattrs; the first 4 766355da1ebSSage Weil * bytes are the xattr count). 767355da1ebSSage Weil */ 768355da1ebSSage Weil if (iinfo->xattr_len > 4) { 769b6c1d5b8SSage Weil xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 770355da1ebSSage Weil if (!xattr_blob) 771355da1ebSSage Weil pr_err("fill_inode ENOMEM xattr blob %d bytes\n", 772355da1ebSSage Weil iinfo->xattr_len); 773355da1ebSSage Weil } 774355da1ebSSage Weil 775779fe0fbSYan, Zheng if (iinfo->pool_ns_len > 0) 776779fe0fbSYan, Zheng pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, 777779fe0fbSYan, Zheng iinfo->pool_ns_len); 778779fe0fbSYan, Zheng 779be655596SSage Weil spin_lock(&ci->i_ceph_lock); 780355da1ebSSage Weil 781355da1ebSSage Weil /* 782355da1ebSSage Weil * provided version will be odd if inode value is projected, 7838bd59e01SSage Weil * even if stable. skip the update if we have newer stable 7848bd59e01SSage Weil * info (ours>=theirs, e.g. due to racing mds replies), unless 7858bd59e01SSage Weil * we are getting projected (unstable) info (in which case the 7868bd59e01SSage Weil * version is odd, and we want ours>theirs). 7878bd59e01SSage Weil * us them 7888bd59e01SSage Weil * 2 2 skip 7898bd59e01SSage Weil * 3 2 skip 7908bd59e01SSage Weil * 3 3 update 791355da1ebSSage Weil */ 792f98a128aSYan, Zheng if (ci->i_version == 0 || 793f98a128aSYan, Zheng ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 794f98a128aSYan, Zheng le64_to_cpu(info->version) > (ci->i_version & ~1))) 795f98a128aSYan, Zheng new_version = true; 796355da1ebSSage Weil 7972af54a72SYan, Zheng __ceph_caps_issued(ci, &issued); 7982af54a72SYan, Zheng issued |= __ceph_caps_dirty(ci); 7992af54a72SYan, Zheng new_issued = ~issued & info_caps; 800355da1ebSSage Weil 801355da1ebSSage Weil /* update inode */ 802355da1ebSSage Weil inode->i_rdev = le32_to_cpu(info->rdev); 803f98a128aSYan, Zheng inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 804355da1ebSSage Weil 805d557c48dSLuis Henriques __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); 806fb18a575SLuis Henriques 807f98a128aSYan, Zheng if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && 808f98a128aSYan, Zheng (issued & CEPH_CAP_AUTH_EXCL) == 0) { 809355da1ebSSage Weil inode->i_mode = le32_to_cpu(info->mode); 810ab871b90SEric W. Biederman inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 811ab871b90SEric W. Biederman inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 812355da1ebSSage Weil dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, 813bd2bae6aSEric W. Biederman from_kuid(&init_user_ns, inode->i_uid), 814bd2bae6aSEric W. Biederman from_kgid(&init_user_ns, inode->i_gid)); 815355da1ebSSage Weil } 816355da1ebSSage Weil 817f98a128aSYan, Zheng if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && 818f98a128aSYan, Zheng (issued & CEPH_CAP_LINK_EXCL) == 0) 819bfe86848SMiklos Szeredi set_nlink(inode, le32_to_cpu(info->nlink)); 820355da1ebSSage Weil 821f98a128aSYan, Zheng if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { 822355da1ebSSage Weil /* be careful with mtime, atime, size */ 823355da1ebSSage Weil ceph_decode_timespec(&atime, &info->atime); 824355da1ebSSage Weil ceph_decode_timespec(&mtime, &info->mtime); 825355da1ebSSage Weil ceph_decode_timespec(&ctime, &info->ctime); 826f98a128aSYan, Zheng ceph_fill_file_time(inode, issued, 827f98a128aSYan, Zheng le32_to_cpu(info->time_warp_seq), 828f98a128aSYan, Zheng &ctime, &mtime, &atime); 829f98a128aSYan, Zheng } 830f98a128aSYan, Zheng 8312af54a72SYan, Zheng if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { 8322af54a72SYan, Zheng ci->i_files = le64_to_cpu(info->files); 8332af54a72SYan, Zheng ci->i_subdirs = le64_to_cpu(info->subdirs); 8342af54a72SYan, Zheng } 8352af54a72SYan, Zheng 836f98a128aSYan, Zheng if (new_version || 837f98a128aSYan, Zheng (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { 8387627151eSYan, Zheng s64 old_pool = ci->i_layout.pool_id; 839779fe0fbSYan, Zheng struct ceph_string *old_ns; 840779fe0fbSYan, Zheng 8417627151eSYan, Zheng ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); 842779fe0fbSYan, Zheng old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, 843779fe0fbSYan, Zheng lockdep_is_held(&ci->i_ceph_lock)); 844779fe0fbSYan, Zheng rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); 845779fe0fbSYan, Zheng 846779fe0fbSYan, Zheng if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) 84710183a69SYan, Zheng ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; 84810183a69SYan, Zheng 849779fe0fbSYan, Zheng pool_ns = old_ns; 850f98a128aSYan, Zheng 851355da1ebSSage Weil queue_trunc = ceph_fill_file_size(inode, issued, 852355da1ebSSage Weil le32_to_cpu(info->truncate_seq), 853355da1ebSSage Weil le64_to_cpu(info->truncate_size), 854355da1ebSSage Weil le64_to_cpu(info->size)); 855f98a128aSYan, Zheng /* only update max_size on auth cap */ 856f98a128aSYan, Zheng if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 857f98a128aSYan, Zheng ci->i_max_size != le64_to_cpu(info->max_size)) { 858f98a128aSYan, Zheng dout("max_size %lld -> %llu\n", ci->i_max_size, 859f98a128aSYan, Zheng le64_to_cpu(info->max_size)); 860f98a128aSYan, Zheng ci->i_max_size = le64_to_cpu(info->max_size); 861f98a128aSYan, Zheng } 862f98a128aSYan, Zheng } 863355da1ebSSage Weil 86449a9f4f6SYan, Zheng /* layout and rstat are not tracked by capability, update them if 86549a9f4f6SYan, Zheng * the inode info is from auth mds */ 86649a9f4f6SYan, Zheng if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { 86749a9f4f6SYan, Zheng if (S_ISDIR(inode->i_mode)) { 86849a9f4f6SYan, Zheng ci->i_dir_layout = iinfo->dir_layout; 86949a9f4f6SYan, Zheng ci->i_rbytes = le64_to_cpu(info->rbytes); 87049a9f4f6SYan, Zheng ci->i_rfiles = le64_to_cpu(info->rfiles); 87149a9f4f6SYan, Zheng ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 87249a9f4f6SYan, Zheng ceph_decode_timespec(&ci->i_rctime, &info->rctime); 87349a9f4f6SYan, Zheng } 87449a9f4f6SYan, Zheng } 87549a9f4f6SYan, Zheng 876355da1ebSSage Weil /* xattrs */ 877355da1ebSSage Weil /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 878508b32d8SYan, Zheng if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && 879355da1ebSSage Weil le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 880355da1ebSSage Weil if (ci->i_xattrs.blob) 881355da1ebSSage Weil ceph_buffer_put(ci->i_xattrs.blob); 882355da1ebSSage Weil ci->i_xattrs.blob = xattr_blob; 883355da1ebSSage Weil if (xattr_blob) 884355da1ebSSage Weil memcpy(ci->i_xattrs.blob->vec.iov_base, 885355da1ebSSage Weil iinfo->xattr_data, iinfo->xattr_len); 886355da1ebSSage Weil ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 8877221fe4cSGuangliang Zhao ceph_forget_all_cached_acls(inode); 888a6424e48SSage Weil xattr_blob = NULL; 889355da1ebSSage Weil } 890355da1ebSSage Weil 891ffdeec7aSYan, Zheng /* finally update i_version */ 892ffdeec7aSYan, Zheng ci->i_version = le64_to_cpu(info->version); 893ffdeec7aSYan, Zheng 894355da1ebSSage Weil inode->i_mapping->a_ops = &ceph_aops; 895355da1ebSSage Weil 896355da1ebSSage Weil switch (inode->i_mode & S_IFMT) { 897355da1ebSSage Weil case S_IFIFO: 898355da1ebSSage Weil case S_IFBLK: 899355da1ebSSage Weil case S_IFCHR: 900355da1ebSSage Weil case S_IFSOCK: 901355da1ebSSage Weil init_special_inode(inode, inode->i_mode, inode->i_rdev); 902355da1ebSSage Weil inode->i_op = &ceph_file_iops; 903355da1ebSSage Weil break; 904355da1ebSSage Weil case S_IFREG: 905355da1ebSSage Weil inode->i_op = &ceph_file_iops; 906355da1ebSSage Weil inode->i_fop = &ceph_file_fops; 907355da1ebSSage Weil break; 908355da1ebSSage Weil case S_IFLNK: 909355da1ebSSage Weil inode->i_op = &ceph_symlink_iops; 910355da1ebSSage Weil if (!ci->i_symlink) { 911810339ecSXi Wang u32 symlen = iinfo->symlink_len; 912355da1ebSSage Weil char *sym; 913355da1ebSSage Weil 914be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 915355da1ebSSage Weil 916224a7542SYan, Zheng if (symlen != i_size_read(inode)) { 917224a7542SYan, Zheng pr_err("fill_inode %llx.%llx BAD symlink " 918224a7542SYan, Zheng "size %lld\n", ceph_vinop(inode), 919224a7542SYan, Zheng i_size_read(inode)); 920224a7542SYan, Zheng i_size_write(inode, symlen); 921224a7542SYan, Zheng inode->i_blocks = calc_inode_blocks(symlen); 922224a7542SYan, Zheng } 923810339ecSXi Wang 924355da1ebSSage Weil err = -ENOMEM; 925810339ecSXi Wang sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 926355da1ebSSage Weil if (!sym) 927355da1ebSSage Weil goto out; 928355da1ebSSage Weil 929be655596SSage Weil spin_lock(&ci->i_ceph_lock); 930355da1ebSSage Weil if (!ci->i_symlink) 931355da1ebSSage Weil ci->i_symlink = sym; 932355da1ebSSage Weil else 933355da1ebSSage Weil kfree(sym); /* lost a race */ 934355da1ebSSage Weil } 935ac194dccSAl Viro inode->i_link = ci->i_symlink; 936355da1ebSSage Weil break; 937355da1ebSSage Weil case S_IFDIR: 938355da1ebSSage Weil inode->i_op = &ceph_dir_iops; 939355da1ebSSage Weil inode->i_fop = &ceph_dir_fops; 940355da1ebSSage Weil break; 941355da1ebSSage Weil default: 942355da1ebSSage Weil pr_err("fill_inode %llx.%llx BAD mode 0%o\n", 943355da1ebSSage Weil ceph_vinop(inode), inode->i_mode); 944355da1ebSSage Weil } 945355da1ebSSage Weil 946355da1ebSSage Weil /* were we issued a capability? */ 9472af54a72SYan, Zheng if (info_caps) { 948355da1ebSSage Weil if (ceph_snap(inode) == CEPH_NOSNAP) { 949355da1ebSSage Weil ceph_add_cap(inode, session, 950355da1ebSSage Weil le64_to_cpu(info->cap.cap_id), 9512af54a72SYan, Zheng cap_fmode, info_caps, 952355da1ebSSage Weil le32_to_cpu(info->cap.wanted), 953355da1ebSSage Weil le32_to_cpu(info->cap.seq), 954355da1ebSSage Weil le32_to_cpu(info->cap.mseq), 955355da1ebSSage Weil le64_to_cpu(info->cap.realm), 956d9df2783SYan, Zheng info->cap.flags, &new_cap); 9572f92b3d0SYan, Zheng 9582f92b3d0SYan, Zheng /* set dir completion flag? */ 9592f92b3d0SYan, Zheng if (S_ISDIR(inode->i_mode) && 9602f92b3d0SYan, Zheng ci->i_files == 0 && ci->i_subdirs == 0 && 9612af54a72SYan, Zheng (info_caps & CEPH_CAP_FILE_SHARED) && 9622f92b3d0SYan, Zheng (issued & CEPH_CAP_FILE_EXCL) == 0 && 9632f92b3d0SYan, Zheng !__ceph_dir_is_complete(ci)) { 9642f92b3d0SYan, Zheng dout(" marking %p complete (empty)\n", inode); 965fdd4e158SYan, Zheng i_size_write(inode, 0); 9662f92b3d0SYan, Zheng __ceph_dir_set_complete(ci, 967fdd4e158SYan, Zheng atomic64_read(&ci->i_release_count), 968fdd4e158SYan, Zheng atomic64_read(&ci->i_ordered_count)); 9692f92b3d0SYan, Zheng } 9702f92b3d0SYan, Zheng 971d9df2783SYan, Zheng wake = true; 972355da1ebSSage Weil } else { 973355da1ebSSage Weil dout(" %p got snap_caps %s\n", inode, 9742af54a72SYan, Zheng ceph_cap_string(info_caps)); 9752af54a72SYan, Zheng ci->i_snap_caps |= info_caps; 976355da1ebSSage Weil if (cap_fmode >= 0) 977355da1ebSSage Weil __ceph_get_fmode(ci, cap_fmode); 978355da1ebSSage Weil } 97904d000ebSSage Weil } else if (cap_fmode >= 0) { 980f3ae1b97SFabian Frederick pr_warn("mds issued no caps on %llx.%llx\n", 98104d000ebSSage Weil ceph_vinop(inode)); 98204d000ebSSage Weil __ceph_get_fmode(ci, cap_fmode); 983355da1ebSSage Weil } 98431c542a1SYan, Zheng 98531c542a1SYan, Zheng if (iinfo->inline_version > 0 && 98631c542a1SYan, Zheng iinfo->inline_version >= ci->i_inline_version) { 98731c542a1SYan, Zheng int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; 98831c542a1SYan, Zheng ci->i_inline_version = iinfo->inline_version; 98931c542a1SYan, Zheng if (ci->i_inline_version != CEPH_INLINE_NONE && 9902af54a72SYan, Zheng (locked_page || (info_caps & cache_caps))) 99131c542a1SYan, Zheng fill_inline = true; 99231c542a1SYan, Zheng } 99331c542a1SYan, Zheng 994355da1ebSSage Weil spin_unlock(&ci->i_ceph_lock); 995355da1ebSSage Weil 99631c542a1SYan, Zheng if (fill_inline) 99701deead0SYan, Zheng ceph_fill_inline_data(inode, locked_page, 99831c542a1SYan, Zheng iinfo->inline_data, iinfo->inline_len); 99931c542a1SYan, Zheng 1000d9df2783SYan, Zheng if (wake) 1001d9df2783SYan, Zheng wake_up_all(&ci->i_cap_wq); 1002d9df2783SYan, Zheng 1003355da1ebSSage Weil /* queue truncate if we saw i_size decrease */ 1004355da1ebSSage Weil if (queue_trunc) 1005355da1ebSSage Weil ceph_queue_vmtruncate(inode); 1006355da1ebSSage Weil 1007355da1ebSSage Weil /* populate frag tree */ 10083e7fbe9cSYan, Zheng if (S_ISDIR(inode->i_mode)) 10093e7fbe9cSYan, Zheng ceph_fill_fragtree(inode, &info->fragtree, dirinfo); 1010355da1ebSSage Weil 1011355da1ebSSage Weil /* update delegation info? */ 1012355da1ebSSage Weil if (dirinfo) 1013355da1ebSSage Weil ceph_fill_dirfrag(inode, dirinfo); 1014355da1ebSSage Weil 1015355da1ebSSage Weil err = 0; 1016355da1ebSSage Weil out: 1017d9df2783SYan, Zheng if (new_cap) 1018d9df2783SYan, Zheng ceph_put_cap(mdsc, new_cap); 1019b6c1d5b8SSage Weil if (xattr_blob) 1020355da1ebSSage Weil ceph_buffer_put(xattr_blob); 1021779fe0fbSYan, Zheng ceph_put_string(pool_ns); 1022355da1ebSSage Weil return err; 1023355da1ebSSage Weil } 1024355da1ebSSage Weil 1025355da1ebSSage Weil /* 1026355da1ebSSage Weil * caller should hold session s_mutex. 1027355da1ebSSage Weil */ 1028355da1ebSSage Weil static void update_dentry_lease(struct dentry *dentry, 1029355da1ebSSage Weil struct ceph_mds_reply_lease *lease, 1030355da1ebSSage Weil struct ceph_mds_session *session, 1031f5d55f03SJeff Layton unsigned long from_time, 1032f5d55f03SJeff Layton struct ceph_vino *tgt_vino, 1033f5d55f03SJeff Layton struct ceph_vino *dir_vino) 1034355da1ebSSage Weil { 1035355da1ebSSage Weil struct ceph_dentry_info *di = ceph_dentry(dentry); 1036355da1ebSSage Weil long unsigned duration = le32_to_cpu(lease->duration_ms); 1037355da1ebSSage Weil long unsigned ttl = from_time + (duration * HZ) / 1000; 1038355da1ebSSage Weil long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 1039355da1ebSSage Weil struct inode *dir; 1040481f001fSYan, Zheng struct ceph_mds_session *old_lease_session = NULL; 1041355da1ebSSage Weil 1042f5d55f03SJeff Layton /* 1043f5d55f03SJeff Layton * Make sure dentry's inode matches tgt_vino. NULL tgt_vino means that 1044f5d55f03SJeff Layton * we expect a negative dentry. 1045f5d55f03SJeff Layton */ 1046f5d55f03SJeff Layton if (!tgt_vino && d_really_is_positive(dentry)) 1047f5d55f03SJeff Layton return; 1048f5d55f03SJeff Layton 1049f5d55f03SJeff Layton if (tgt_vino && (d_really_is_negative(dentry) || 1050f5d55f03SJeff Layton !ceph_ino_compare(d_inode(dentry), tgt_vino))) 1051f5d55f03SJeff Layton return; 1052f5d55f03SJeff Layton 1053355da1ebSSage Weil spin_lock(&dentry->d_lock); 10542f90b852SSage Weil dout("update_dentry_lease %p duration %lu ms ttl %lu\n", 10552f90b852SSage Weil dentry, duration, ttl); 1056355da1ebSSage Weil 10572b0143b5SDavid Howells dir = d_inode(dentry->d_parent); 105818fc8abdSAl Viro 1059f5d55f03SJeff Layton /* make sure parent matches dir_vino */ 1060f5d55f03SJeff Layton if (!ceph_ino_compare(dir, dir_vino)) 1061f5d55f03SJeff Layton goto out_unlock; 1062f5d55f03SJeff Layton 106318fc8abdSAl Viro /* only track leases on regular dentries */ 106418fc8abdSAl Viro if (ceph_snap(dir) != CEPH_NOSNAP) 106518fc8abdSAl Viro goto out_unlock; 106618fc8abdSAl Viro 106797aeb6bfSYan, Zheng di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); 1068355da1ebSSage Weil 10692f90b852SSage Weil if (duration == 0) 1070355da1ebSSage Weil goto out_unlock; 1071355da1ebSSage Weil 1072355da1ebSSage Weil if (di->lease_gen == session->s_cap_gen && 10739b16f03cSMiklos Szeredi time_before(ttl, di->time)) 1074355da1ebSSage Weil goto out_unlock; /* we already have a newer lease. */ 1075355da1ebSSage Weil 1076481f001fSYan, Zheng if (di->lease_session && di->lease_session != session) { 1077481f001fSYan, Zheng old_lease_session = di->lease_session; 1078481f001fSYan, Zheng di->lease_session = NULL; 1079481f001fSYan, Zheng } 1080355da1ebSSage Weil 1081355da1ebSSage Weil ceph_dentry_lru_touch(dentry); 1082355da1ebSSage Weil 1083355da1ebSSage Weil if (!di->lease_session) 1084355da1ebSSage Weil di->lease_session = ceph_get_mds_session(session); 1085355da1ebSSage Weil di->lease_gen = session->s_cap_gen; 1086355da1ebSSage Weil di->lease_seq = le32_to_cpu(lease->seq); 1087355da1ebSSage Weil di->lease_renew_after = half_ttl; 1088355da1ebSSage Weil di->lease_renew_from = 0; 10899b16f03cSMiklos Szeredi di->time = ttl; 1090355da1ebSSage Weil out_unlock: 1091355da1ebSSage Weil spin_unlock(&dentry->d_lock); 1092481f001fSYan, Zheng if (old_lease_session) 1093481f001fSYan, Zheng ceph_put_mds_session(old_lease_session); 1094355da1ebSSage Weil } 1095355da1ebSSage Weil 1096355da1ebSSage Weil /* 10971cd3935bSSage Weil * splice a dentry to an inode. 10981cd3935bSSage Weil * caller must hold directory i_mutex for this to be safe. 10991cd3935bSSage Weil */ 1100f7380af0SAl Viro static struct dentry *splice_dentry(struct dentry *dn, struct inode *in) 11011cd3935bSSage Weil { 11021cd3935bSSage Weil struct dentry *realdn; 11031cd3935bSSage Weil 11042b0143b5SDavid Howells BUG_ON(d_inode(dn)); 11051cd3935bSSage Weil 11065495c2d0SYan, Zheng if (S_ISDIR(in->i_mode)) { 11075495c2d0SYan, Zheng /* If inode is directory, d_splice_alias() below will remove 11085495c2d0SYan, Zheng * 'realdn' from its origin parent. We need to ensure that 11095495c2d0SYan, Zheng * origin parent's readdir cache will not reference 'realdn' 11105495c2d0SYan, Zheng */ 11115495c2d0SYan, Zheng realdn = d_find_any_alias(in); 11125495c2d0SYan, Zheng if (realdn) { 11135495c2d0SYan, Zheng struct ceph_dentry_info *di = ceph_dentry(realdn); 11145495c2d0SYan, Zheng spin_lock(&realdn->d_lock); 11155495c2d0SYan, Zheng 11165495c2d0SYan, Zheng realdn->d_op->d_prune(realdn); 11175495c2d0SYan, Zheng 11185495c2d0SYan, Zheng di->time = jiffies; 11195495c2d0SYan, Zheng di->lease_shared_gen = 0; 11205495c2d0SYan, Zheng di->offset = 0; 11215495c2d0SYan, Zheng 11225495c2d0SYan, Zheng spin_unlock(&realdn->d_lock); 11235495c2d0SYan, Zheng dput(realdn); 11245495c2d0SYan, Zheng } 11255495c2d0SYan, Zheng } 11265495c2d0SYan, Zheng 11271cd3935bSSage Weil /* dn must be unhashed */ 11281cd3935bSSage Weil if (!d_unhashed(dn)) 11291cd3935bSSage Weil d_drop(dn); 113041d28bcaSAl Viro realdn = d_splice_alias(in, dn); 11311cd3935bSSage Weil if (IS_ERR(realdn)) { 1132d69ed05aSSage Weil pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", 1133d69ed05aSSage Weil PTR_ERR(realdn), dn, in, ceph_vinop(in)); 11341cd3935bSSage Weil dn = realdn; /* note realdn contains the error */ 11351cd3935bSSage Weil goto out; 11361cd3935bSSage Weil } else if (realdn) { 11371cd3935bSSage Weil dout("dn %p (%d) spliced with %p (%d) " 11381cd3935bSSage Weil "inode %p ino %llx.%llx\n", 113984d08fa8SAl Viro dn, d_count(dn), 114084d08fa8SAl Viro realdn, d_count(realdn), 11412b0143b5SDavid Howells d_inode(realdn), ceph_vinop(d_inode(realdn))); 11421cd3935bSSage Weil dput(dn); 11431cd3935bSSage Weil dn = realdn; 11441cd3935bSSage Weil } else { 11451cd3935bSSage Weil BUG_ON(!ceph_dentry(dn)); 11461cd3935bSSage Weil dout("dn %p attached to %p ino %llx.%llx\n", 11472b0143b5SDavid Howells dn, d_inode(dn), ceph_vinop(d_inode(dn))); 11481cd3935bSSage Weil } 11491cd3935bSSage Weil out: 11501cd3935bSSage Weil return dn; 11511cd3935bSSage Weil } 11521cd3935bSSage Weil 11531cd3935bSSage Weil /* 1154355da1ebSSage Weil * Incorporate results into the local cache. This is either just 1155355da1ebSSage Weil * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 1156355da1ebSSage Weil * after a lookup). 1157355da1ebSSage Weil * 1158355da1ebSSage Weil * A reply may contain 1159355da1ebSSage Weil * a directory inode along with a dentry. 1160355da1ebSSage Weil * and/or a target inode 1161355da1ebSSage Weil * 1162355da1ebSSage Weil * Called with snap_rwsem (read). 1163355da1ebSSage Weil */ 1164f5a03b08SJeff Layton int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) 1165355da1ebSSage Weil { 1166f5a03b08SJeff Layton struct ceph_mds_session *session = req->r_session; 1167355da1ebSSage Weil struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1168355da1ebSSage Weil struct inode *in = NULL; 1169f5d55f03SJeff Layton struct ceph_vino tvino, dvino; 11703d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 1171355da1ebSSage Weil int err = 0; 1172355da1ebSSage Weil 1173355da1ebSSage Weil dout("fill_trace %p is_dentry %d is_target %d\n", req, 1174355da1ebSSage Weil rinfo->head->is_dentry, rinfo->head->is_target); 1175355da1ebSSage Weil 1176355da1ebSSage Weil if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 1177355da1ebSSage Weil dout("fill_trace reply is empty!\n"); 11783dd69aabSJeff Layton if (rinfo->head->result == 0 && req->r_parent) 1179167c9e35SSage Weil ceph_invalidate_dir_request(req); 1180355da1ebSSage Weil return 0; 1181355da1ebSSage Weil } 1182355da1ebSSage Weil 1183355da1ebSSage Weil if (rinfo->head->is_dentry) { 11843dd69aabSJeff Layton struct inode *dir = req->r_parent; 11855b1daecdSSage Weil 11866c5e50faSSage Weil if (dir) { 118701deead0SYan, Zheng err = fill_inode(dir, NULL, 118801deead0SYan, Zheng &rinfo->diri, rinfo->dirfrag, 11895b1daecdSSage Weil session, req->r_request_started, -1, 11905b1daecdSSage Weil &req->r_caps_reservation); 11915b1daecdSSage Weil if (err < 0) 119219913b4eSYan, Zheng goto done; 11936c5e50faSSage Weil } else { 11946c5e50faSSage Weil WARN_ON_ONCE(1); 11956c5e50faSSage Weil } 119619913b4eSYan, Zheng 119719913b4eSYan, Zheng if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) { 119819913b4eSYan, Zheng struct qstr dname; 119919913b4eSYan, Zheng struct dentry *dn, *parent; 120019913b4eSYan, Zheng 120119913b4eSYan, Zheng BUG_ON(!rinfo->head->is_target); 120219913b4eSYan, Zheng BUG_ON(req->r_dentry); 120319913b4eSYan, Zheng 120419913b4eSYan, Zheng parent = d_find_any_alias(dir); 120519913b4eSYan, Zheng BUG_ON(!parent); 120619913b4eSYan, Zheng 120719913b4eSYan, Zheng dname.name = rinfo->dname; 120819913b4eSYan, Zheng dname.len = rinfo->dname_len; 12098387ff25SLinus Torvalds dname.hash = full_name_hash(parent, dname.name, dname.len); 1210f5d55f03SJeff Layton tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1211f5d55f03SJeff Layton tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 121219913b4eSYan, Zheng retry_lookup: 121319913b4eSYan, Zheng dn = d_lookup(parent, &dname); 121419913b4eSYan, Zheng dout("d_lookup on parent=%p name=%.*s got %p\n", 121519913b4eSYan, Zheng parent, dname.len, dname.name, dn); 121619913b4eSYan, Zheng 121719913b4eSYan, Zheng if (!dn) { 121819913b4eSYan, Zheng dn = d_alloc(parent, &dname); 121919913b4eSYan, Zheng dout("d_alloc %p '%.*s' = %p\n", parent, 122019913b4eSYan, Zheng dname.len, dname.name, dn); 1221d37b1d99SMarkus Elfring if (!dn) { 122219913b4eSYan, Zheng dput(parent); 122319913b4eSYan, Zheng err = -ENOMEM; 122419913b4eSYan, Zheng goto done; 122519913b4eSYan, Zheng } 1226ad5cb123SAl Viro err = 0; 12272b0143b5SDavid Howells } else if (d_really_is_positive(dn) && 1228f5d55f03SJeff Layton (ceph_ino(d_inode(dn)) != tvino.ino || 1229f5d55f03SJeff Layton ceph_snap(d_inode(dn)) != tvino.snap)) { 123019913b4eSYan, Zheng dout(" dn %p points to wrong inode %p\n", 12312b0143b5SDavid Howells dn, d_inode(dn)); 1232933ad2c9SYan, Zheng ceph_dir_clear_ordered(dir); 123319913b4eSYan, Zheng d_delete(dn); 123419913b4eSYan, Zheng dput(dn); 123519913b4eSYan, Zheng goto retry_lookup; 123619913b4eSYan, Zheng } 123719913b4eSYan, Zheng 123819913b4eSYan, Zheng req->r_dentry = dn; 123919913b4eSYan, Zheng dput(parent); 124019913b4eSYan, Zheng } 12415b1daecdSSage Weil } 12425b1daecdSSage Weil 124386b58d13SYan, Zheng if (rinfo->head->is_target) { 1244f5d55f03SJeff Layton tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1245f5d55f03SJeff Layton tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 124686b58d13SYan, Zheng 1247f5d55f03SJeff Layton in = ceph_get_inode(sb, tvino); 124886b58d13SYan, Zheng if (IS_ERR(in)) { 124986b58d13SYan, Zheng err = PTR_ERR(in); 125086b58d13SYan, Zheng goto done; 125186b58d13SYan, Zheng } 125286b58d13SYan, Zheng req->r_target_inode = in; 125386b58d13SYan, Zheng 125401deead0SYan, Zheng err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL, 125586b58d13SYan, Zheng session, req->r_request_started, 1256bc2de10dSJeff Layton (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1257bc2de10dSJeff Layton rinfo->head->result == 0) ? req->r_fmode : -1, 125886b58d13SYan, Zheng &req->r_caps_reservation); 125986b58d13SYan, Zheng if (err < 0) { 126086b58d13SYan, Zheng pr_err("fill_inode badness %p %llx.%llx\n", 126186b58d13SYan, Zheng in, ceph_vinop(in)); 126286b58d13SYan, Zheng goto done; 126386b58d13SYan, Zheng } 126486b58d13SYan, Zheng } 126586b58d13SYan, Zheng 12669358c6d4SSage Weil /* 12679358c6d4SSage Weil * ignore null lease/binding on snapdir ENOENT, or else we 12689358c6d4SSage Weil * will have trouble splicing in the virtual snapdir later 12699358c6d4SSage Weil */ 12703dd69aabSJeff Layton if (rinfo->head->is_dentry && 1271bc2de10dSJeff Layton !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 12723dd69aabSJeff Layton test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 12739358c6d4SSage Weil (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 12743d14c5d2SYehuda Sadeh fsc->mount_options->snapdir_name, 12759358c6d4SSage Weil req->r_dentry->d_name.len))) { 1276355da1ebSSage Weil /* 1277355da1ebSSage Weil * lookup link rename : null -> possibly existing inode 1278355da1ebSSage Weil * mknod symlink mkdir : null -> new inode 1279355da1ebSSage Weil * unlink : linked -> null 1280355da1ebSSage Weil */ 12813dd69aabSJeff Layton struct inode *dir = req->r_parent; 1282355da1ebSSage Weil struct dentry *dn = req->r_dentry; 1283355da1ebSSage Weil bool have_dir_cap, have_lease; 1284355da1ebSSage Weil 1285355da1ebSSage Weil BUG_ON(!dn); 1286355da1ebSSage Weil BUG_ON(!dir); 12872b0143b5SDavid Howells BUG_ON(d_inode(dn->d_parent) != dir); 1288f5d55f03SJeff Layton 1289f5d55f03SJeff Layton dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1290f5d55f03SJeff Layton dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1291f5d55f03SJeff Layton 1292f5d55f03SJeff Layton BUG_ON(ceph_ino(dir) != dvino.ino); 1293f5d55f03SJeff Layton BUG_ON(ceph_snap(dir) != dvino.snap); 1294355da1ebSSage Weil 1295355da1ebSSage Weil /* do we have a lease on the whole dir? */ 1296355da1ebSSage Weil have_dir_cap = 1297355da1ebSSage Weil (le32_to_cpu(rinfo->diri.in->cap.caps) & 1298355da1ebSSage Weil CEPH_CAP_FILE_SHARED); 1299355da1ebSSage Weil 1300355da1ebSSage Weil /* do we have a dn lease? */ 1301355da1ebSSage Weil have_lease = have_dir_cap || 13022f90b852SSage Weil le32_to_cpu(rinfo->dlease->duration_ms); 1303355da1ebSSage Weil if (!have_lease) 1304355da1ebSSage Weil dout("fill_trace no dentry lease or dir cap\n"); 1305355da1ebSSage Weil 1306355da1ebSSage Weil /* rename? */ 1307355da1ebSSage Weil if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 13080a8a70f9SYan, Zheng struct inode *olddir = req->r_old_dentry_dir; 13090a8a70f9SYan, Zheng BUG_ON(!olddir); 13100a8a70f9SYan, Zheng 1311a455589fSAl Viro dout(" src %p '%pd' dst %p '%pd'\n", 1312355da1ebSSage Weil req->r_old_dentry, 1313a455589fSAl Viro req->r_old_dentry, 1314a455589fSAl Viro dn, dn); 1315355da1ebSSage Weil dout("fill_trace doing d_move %p -> %p\n", 1316355da1ebSSage Weil req->r_old_dentry, dn); 1317c10f5e12SSage Weil 1318fdd4e158SYan, Zheng /* d_move screws up sibling dentries' offsets */ 1319fdd4e158SYan, Zheng ceph_dir_clear_ordered(dir); 1320fdd4e158SYan, Zheng ceph_dir_clear_ordered(olddir); 1321fdd4e158SYan, Zheng 1322355da1ebSSage Weil d_move(req->r_old_dentry, dn); 1323a455589fSAl Viro dout(" src %p '%pd' dst %p '%pd'\n", 1324355da1ebSSage Weil req->r_old_dentry, 1325a455589fSAl Viro req->r_old_dentry, 1326a455589fSAl Viro dn, dn); 132781a6cf2dSSage Weil 1328c4a29f26SSage Weil /* ensure target dentry is invalidated, despite 1329c4a29f26SSage Weil rehashing bug in vfs_rename_dir */ 133081a6cf2dSSage Weil ceph_invalidate_dentry_lease(dn); 133181a6cf2dSSage Weil 133209adc80cSSage Weil dout("dn %p gets new offset %lld\n", req->r_old_dentry, 13331cd3935bSSage Weil ceph_dentry(req->r_old_dentry)->offset); 133481a6cf2dSSage Weil 1335355da1ebSSage Weil dn = req->r_old_dentry; /* use old_dentry */ 1336355da1ebSSage Weil } 1337355da1ebSSage Weil 1338355da1ebSSage Weil /* null dentry? */ 1339355da1ebSSage Weil if (!rinfo->head->is_target) { 1340355da1ebSSage Weil dout("fill_trace null dentry\n"); 13412b0143b5SDavid Howells if (d_really_is_positive(dn)) { 1342355da1ebSSage Weil dout("d_delete %p\n", dn); 13435495c2d0SYan, Zheng ceph_dir_clear_ordered(dir); 1344355da1ebSSage Weil d_delete(dn); 134580d025ffSJeff Layton } else if (have_lease) { 134680d025ffSJeff Layton if (d_unhashed(dn)) 1347f8b31710SAl Viro d_add(dn, NULL); 1348355da1ebSSage Weil update_dentry_lease(dn, rinfo->dlease, 1349355da1ebSSage Weil session, 1350f5d55f03SJeff Layton req->r_request_started, 1351f5d55f03SJeff Layton NULL, &dvino); 1352355da1ebSSage Weil } 1353355da1ebSSage Weil goto done; 1354355da1ebSSage Weil } 1355355da1ebSSage Weil 1356355da1ebSSage Weil /* attach proper inode */ 13572b0143b5SDavid Howells if (d_really_is_negative(dn)) { 135870db4f36SYan, Zheng ceph_dir_clear_ordered(dir); 135986b58d13SYan, Zheng ihold(in); 1360f7380af0SAl Viro dn = splice_dentry(dn, in); 1361355da1ebSSage Weil if (IS_ERR(dn)) { 1362355da1ebSSage Weil err = PTR_ERR(dn); 1363355da1ebSSage Weil goto done; 1364355da1ebSSage Weil } 1365355da1ebSSage Weil req->r_dentry = dn; /* may have spliced */ 13662b0143b5SDavid Howells } else if (d_really_is_positive(dn) && d_inode(dn) != in) { 1367355da1ebSSage Weil dout(" %p links to %p %llx.%llx, not %llx.%llx\n", 13682b0143b5SDavid Howells dn, d_inode(dn), ceph_vinop(d_inode(dn)), 136986b58d13SYan, Zheng ceph_vinop(in)); 1370200fd27cSYan, Zheng d_invalidate(dn); 1371355da1ebSSage Weil have_lease = false; 1372355da1ebSSage Weil } 1373355da1ebSSage Weil 1374f5d55f03SJeff Layton if (have_lease) { 1375f5d55f03SJeff Layton tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1376f5d55f03SJeff Layton tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1377355da1ebSSage Weil update_dentry_lease(dn, rinfo->dlease, session, 1378f5d55f03SJeff Layton req->r_request_started, 1379f5d55f03SJeff Layton &tvino, &dvino); 1380f5d55f03SJeff Layton } 1381355da1ebSSage Weil dout(" final dn %p\n", dn); 1382bc2de10dSJeff Layton } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1383bc2de10dSJeff Layton req->r_op == CEPH_MDS_OP_MKSNAP) && 1384bc2de10dSJeff Layton !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1385355da1ebSSage Weil struct dentry *dn = req->r_dentry; 13863dd69aabSJeff Layton struct inode *dir = req->r_parent; 1387355da1ebSSage Weil 1388355da1ebSSage Weil /* fill out a snapdir LOOKUPSNAP dentry */ 1389355da1ebSSage Weil BUG_ON(!dn); 13900a8a70f9SYan, Zheng BUG_ON(!dir); 13910a8a70f9SYan, Zheng BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); 1392355da1ebSSage Weil dout(" linking snapped dir %p to dn %p\n", in, dn); 139370db4f36SYan, Zheng ceph_dir_clear_ordered(dir); 139486b58d13SYan, Zheng ihold(in); 1395f7380af0SAl Viro dn = splice_dentry(dn, in); 1396355da1ebSSage Weil if (IS_ERR(dn)) { 1397355da1ebSSage Weil err = PTR_ERR(dn); 1398355da1ebSSage Weil goto done; 1399355da1ebSSage Weil } 1400355da1ebSSage Weil req->r_dentry = dn; /* may have spliced */ 1401cdde7c43SJeff Layton } else if (rinfo->head->is_dentry) { 1402cdde7c43SJeff Layton struct ceph_vino *ptvino = NULL; 1403cdde7c43SJeff Layton 1404cdde7c43SJeff Layton if ((le32_to_cpu(rinfo->diri.in->cap.caps) & CEPH_CAP_FILE_SHARED) || 1405cdde7c43SJeff Layton le32_to_cpu(rinfo->dlease->duration_ms)) { 1406cdde7c43SJeff Layton dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1407cdde7c43SJeff Layton dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1408cdde7c43SJeff Layton 1409cdde7c43SJeff Layton if (rinfo->head->is_target) { 1410cdde7c43SJeff Layton tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1411cdde7c43SJeff Layton tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1412cdde7c43SJeff Layton ptvino = &tvino; 1413cdde7c43SJeff Layton } 1414cdde7c43SJeff Layton 1415cdde7c43SJeff Layton update_dentry_lease(req->r_dentry, rinfo->dlease, 1416cdde7c43SJeff Layton session, req->r_request_started, ptvino, 1417cdde7c43SJeff Layton &dvino); 1418cdde7c43SJeff Layton } else { 1419cdde7c43SJeff Layton dout("%s: no dentry lease or dir cap\n", __func__); 1420cdde7c43SJeff Layton } 1421355da1ebSSage Weil } 1422355da1ebSSage Weil done: 1423355da1ebSSage Weil dout("fill_trace done err=%d\n", err); 1424355da1ebSSage Weil return err; 1425355da1ebSSage Weil } 1426355da1ebSSage Weil 1427355da1ebSSage Weil /* 1428355da1ebSSage Weil * Prepopulate our cache with readdir results, leases, etc. 1429355da1ebSSage Weil */ 143079f9f99aSSage Weil static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 143179f9f99aSSage Weil struct ceph_mds_session *session) 143279f9f99aSSage Weil { 143379f9f99aSSage Weil struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 143479f9f99aSSage Weil int i, err = 0; 143579f9f99aSSage Weil 143679f9f99aSSage Weil for (i = 0; i < rinfo->dir_nr; i++) { 14372a5beea3SYan, Zheng struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 143879f9f99aSSage Weil struct ceph_vino vino; 143979f9f99aSSage Weil struct inode *in; 144079f9f99aSSage Weil int rc; 144179f9f99aSSage Weil 14422a5beea3SYan, Zheng vino.ino = le64_to_cpu(rde->inode.in->ino); 14432a5beea3SYan, Zheng vino.snap = le64_to_cpu(rde->inode.in->snapid); 144479f9f99aSSage Weil 144579f9f99aSSage Weil in = ceph_get_inode(req->r_dentry->d_sb, vino); 144679f9f99aSSage Weil if (IS_ERR(in)) { 144779f9f99aSSage Weil err = PTR_ERR(in); 144879f9f99aSSage Weil dout("new_inode badness got %d\n", err); 144979f9f99aSSage Weil continue; 145079f9f99aSSage Weil } 14512a5beea3SYan, Zheng rc = fill_inode(in, NULL, &rde->inode, NULL, session, 145279f9f99aSSage Weil req->r_request_started, -1, 145379f9f99aSSage Weil &req->r_caps_reservation); 145479f9f99aSSage Weil if (rc < 0) { 145579f9f99aSSage Weil pr_err("fill_inode badness on %p got %d\n", in, rc); 145679f9f99aSSage Weil err = rc; 145779f9f99aSSage Weil } 1458209ae762SYan, Zheng iput(in); 145979f9f99aSSage Weil } 146079f9f99aSSage Weil 146179f9f99aSSage Weil return err; 146279f9f99aSSage Weil } 146379f9f99aSSage Weil 1464fdd4e158SYan, Zheng void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) 1465fdd4e158SYan, Zheng { 1466fdd4e158SYan, Zheng if (ctl->page) { 1467fdd4e158SYan, Zheng kunmap(ctl->page); 146809cbfeafSKirill A. Shutemov put_page(ctl->page); 1469fdd4e158SYan, Zheng ctl->page = NULL; 1470fdd4e158SYan, Zheng } 1471fdd4e158SYan, Zheng } 1472fdd4e158SYan, Zheng 1473fdd4e158SYan, Zheng static int fill_readdir_cache(struct inode *dir, struct dentry *dn, 1474fdd4e158SYan, Zheng struct ceph_readdir_cache_control *ctl, 1475fdd4e158SYan, Zheng struct ceph_mds_request *req) 1476fdd4e158SYan, Zheng { 1477fdd4e158SYan, Zheng struct ceph_inode_info *ci = ceph_inode(dir); 147809cbfeafSKirill A. Shutemov unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); 1479fdd4e158SYan, Zheng unsigned idx = ctl->index % nsize; 1480fdd4e158SYan, Zheng pgoff_t pgoff = ctl->index / nsize; 1481fdd4e158SYan, Zheng 1482fdd4e158SYan, Zheng if (!ctl->page || pgoff != page_index(ctl->page)) { 1483fdd4e158SYan, Zheng ceph_readdir_cache_release(ctl); 1484af5e5eb5SYan, Zheng if (idx == 0) 1485fdd4e158SYan, Zheng ctl->page = grab_cache_page(&dir->i_data, pgoff); 1486af5e5eb5SYan, Zheng else 1487af5e5eb5SYan, Zheng ctl->page = find_lock_page(&dir->i_data, pgoff); 1488fdd4e158SYan, Zheng if (!ctl->page) { 1489fdd4e158SYan, Zheng ctl->index = -1; 1490af5e5eb5SYan, Zheng return idx == 0 ? -ENOMEM : 0; 1491fdd4e158SYan, Zheng } 1492fdd4e158SYan, Zheng /* reading/filling the cache are serialized by 1493fdd4e158SYan, Zheng * i_mutex, no need to use page lock */ 1494fdd4e158SYan, Zheng unlock_page(ctl->page); 1495fdd4e158SYan, Zheng ctl->dentries = kmap(ctl->page); 1496af5e5eb5SYan, Zheng if (idx == 0) 149709cbfeafSKirill A. Shutemov memset(ctl->dentries, 0, PAGE_SIZE); 1498fdd4e158SYan, Zheng } 1499fdd4e158SYan, Zheng 1500fdd4e158SYan, Zheng if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && 1501fdd4e158SYan, Zheng req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { 1502fdd4e158SYan, Zheng dout("readdir cache dn %p idx %d\n", dn, ctl->index); 1503fdd4e158SYan, Zheng ctl->dentries[idx] = dn; 1504fdd4e158SYan, Zheng ctl->index++; 1505fdd4e158SYan, Zheng } else { 1506fdd4e158SYan, Zheng dout("disable readdir cache\n"); 1507fdd4e158SYan, Zheng ctl->index = -1; 1508fdd4e158SYan, Zheng } 1509fdd4e158SYan, Zheng return 0; 1510fdd4e158SYan, Zheng } 1511fdd4e158SYan, Zheng 1512355da1ebSSage Weil int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1513355da1ebSSage Weil struct ceph_mds_session *session) 1514355da1ebSSage Weil { 1515355da1ebSSage Weil struct dentry *parent = req->r_dentry; 1516f3c4ebe6SYan, Zheng struct ceph_inode_info *ci = ceph_inode(d_inode(parent)); 1517355da1ebSSage Weil struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1518355da1ebSSage Weil struct qstr dname; 1519355da1ebSSage Weil struct dentry *dn; 1520355da1ebSSage Weil struct inode *in; 1521315f2408SYan, Zheng int err = 0, skipped = 0, ret, i; 1522355da1ebSSage Weil struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; 152381c6aea5SYan, Zheng u32 frag = le32_to_cpu(rhead->args.readdir.frag); 1524f3c4ebe6SYan, Zheng u32 last_hash = 0; 1525f3c4ebe6SYan, Zheng u32 fpos_offset; 1526fdd4e158SYan, Zheng struct ceph_readdir_cache_control cache_ctl = {}; 1527fdd4e158SYan, Zheng 1528bc2de10dSJeff Layton if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) 1529fdd4e158SYan, Zheng return readdir_prepopulate_inodes_only(req, session); 153081c6aea5SYan, Zheng 153179162547SYan, Zheng if (rinfo->hash_order) { 153279162547SYan, Zheng if (req->r_path2) { 1533f3c4ebe6SYan, Zheng last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, 153479162547SYan, Zheng req->r_path2, 153579162547SYan, Zheng strlen(req->r_path2)); 1536f3c4ebe6SYan, Zheng last_hash = ceph_frag_value(last_hash); 153779162547SYan, Zheng } else if (rinfo->offset_hash) { 153879162547SYan, Zheng /* mds understands offset_hash */ 153979162547SYan, Zheng WARN_ON_ONCE(req->r_readdir_offset != 2); 154079162547SYan, Zheng last_hash = le32_to_cpu(rhead->args.readdir.offset_hash); 154179162547SYan, Zheng } 1542f3c4ebe6SYan, Zheng } 1543f3c4ebe6SYan, Zheng 154481c6aea5SYan, Zheng if (rinfo->dir_dir && 154581c6aea5SYan, Zheng le32_to_cpu(rinfo->dir_dir->frag) != frag) { 154681c6aea5SYan, Zheng dout("readdir_prepopulate got new frag %x -> %x\n", 154781c6aea5SYan, Zheng frag, le32_to_cpu(rinfo->dir_dir->frag)); 154881c6aea5SYan, Zheng frag = le32_to_cpu(rinfo->dir_dir->frag); 1549f3c4ebe6SYan, Zheng if (!rinfo->hash_order) 1550fdd4e158SYan, Zheng req->r_readdir_offset = 2; 155181c6aea5SYan, Zheng } 1552355da1ebSSage Weil 1553355da1ebSSage Weil if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1554355da1ebSSage Weil dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", 1555355da1ebSSage Weil rinfo->dir_nr, parent); 1556355da1ebSSage Weil } else { 1557355da1ebSSage Weil dout("readdir_prepopulate %d items under dn %p\n", 1558355da1ebSSage Weil rinfo->dir_nr, parent); 1559355da1ebSSage Weil if (rinfo->dir_dir) 15602b0143b5SDavid Howells ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); 1561355da1ebSSage Weil 15628d45b911SYan, Zheng if (ceph_frag_is_leftmost(frag) && 15638d45b911SYan, Zheng req->r_readdir_offset == 2 && 156479162547SYan, Zheng !(rinfo->hash_order && last_hash)) { 15658d45b911SYan, Zheng /* note dir version at start of readdir so we can 15668d45b911SYan, Zheng * tell if any dentries get dropped */ 15678d45b911SYan, Zheng req->r_dir_release_cnt = 15688d45b911SYan, Zheng atomic64_read(&ci->i_release_count); 15698d45b911SYan, Zheng req->r_dir_ordered_cnt = 15708d45b911SYan, Zheng atomic64_read(&ci->i_ordered_count); 1571fdd4e158SYan, Zheng req->r_readdir_cache_idx = 0; 1572fdd4e158SYan, Zheng } 15738d45b911SYan, Zheng } 1574fdd4e158SYan, Zheng 1575fdd4e158SYan, Zheng cache_ctl.index = req->r_readdir_cache_idx; 1576f3c4ebe6SYan, Zheng fpos_offset = req->r_readdir_offset; 1577fdd4e158SYan, Zheng 157886b58d13SYan, Zheng /* FIXME: release caps/leases if error occurs */ 1579355da1ebSSage Weil for (i = 0; i < rinfo->dir_nr; i++) { 15802a5beea3SYan, Zheng struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1581f5d55f03SJeff Layton struct ceph_vino tvino, dvino; 1582355da1ebSSage Weil 15832a5beea3SYan, Zheng dname.name = rde->name; 15842a5beea3SYan, Zheng dname.len = rde->name_len; 15858387ff25SLinus Torvalds dname.hash = full_name_hash(parent, dname.name, dname.len); 1586355da1ebSSage Weil 1587f5d55f03SJeff Layton tvino.ino = le64_to_cpu(rde->inode.in->ino); 1588f5d55f03SJeff Layton tvino.snap = le64_to_cpu(rde->inode.in->snapid); 1589355da1ebSSage Weil 1590f3c4ebe6SYan, Zheng if (rinfo->hash_order) { 1591f3c4ebe6SYan, Zheng u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, 1592f3c4ebe6SYan, Zheng rde->name, rde->name_len); 1593f3c4ebe6SYan, Zheng hash = ceph_frag_value(hash); 1594f3c4ebe6SYan, Zheng if (hash != last_hash) 1595f3c4ebe6SYan, Zheng fpos_offset = 2; 1596f3c4ebe6SYan, Zheng last_hash = hash; 1597f3c4ebe6SYan, Zheng rde->offset = ceph_make_fpos(hash, fpos_offset++, true); 1598f3c4ebe6SYan, Zheng } else { 1599f3c4ebe6SYan, Zheng rde->offset = ceph_make_fpos(frag, fpos_offset++, false); 1600f3c4ebe6SYan, Zheng } 1601355da1ebSSage Weil 1602355da1ebSSage Weil retry_lookup: 1603355da1ebSSage Weil dn = d_lookup(parent, &dname); 1604355da1ebSSage Weil dout("d_lookup on parent=%p name=%.*s got %p\n", 1605355da1ebSSage Weil parent, dname.len, dname.name, dn); 1606355da1ebSSage Weil 1607355da1ebSSage Weil if (!dn) { 1608355da1ebSSage Weil dn = d_alloc(parent, &dname); 1609355da1ebSSage Weil dout("d_alloc %p '%.*s' = %p\n", parent, 1610355da1ebSSage Weil dname.len, dname.name, dn); 1611d37b1d99SMarkus Elfring if (!dn) { 1612355da1ebSSage Weil dout("d_alloc badness\n"); 1613355da1ebSSage Weil err = -ENOMEM; 1614355da1ebSSage Weil goto out; 1615355da1ebSSage Weil } 16162b0143b5SDavid Howells } else if (d_really_is_positive(dn) && 1617f5d55f03SJeff Layton (ceph_ino(d_inode(dn)) != tvino.ino || 1618f5d55f03SJeff Layton ceph_snap(d_inode(dn)) != tvino.snap)) { 16195495c2d0SYan, Zheng struct ceph_dentry_info *di = ceph_dentry(dn); 1620355da1ebSSage Weil dout(" dn %p points to wrong inode %p\n", 16212b0143b5SDavid Howells dn, d_inode(dn)); 16225495c2d0SYan, Zheng 16235495c2d0SYan, Zheng spin_lock(&dn->d_lock); 16245495c2d0SYan, Zheng if (di->offset > 0 && 16255495c2d0SYan, Zheng di->lease_shared_gen == 16265495c2d0SYan, Zheng atomic_read(&ci->i_shared_gen)) { 1627933ad2c9SYan, Zheng __ceph_dir_clear_ordered(ci); 16285495c2d0SYan, Zheng di->offset = 0; 16295495c2d0SYan, Zheng } 16305495c2d0SYan, Zheng spin_unlock(&dn->d_lock); 16315495c2d0SYan, Zheng 1632355da1ebSSage Weil d_delete(dn); 1633355da1ebSSage Weil dput(dn); 1634355da1ebSSage Weil goto retry_lookup; 1635355da1ebSSage Weil } 1636355da1ebSSage Weil 1637355da1ebSSage Weil /* inode */ 16382b0143b5SDavid Howells if (d_really_is_positive(dn)) { 16392b0143b5SDavid Howells in = d_inode(dn); 1640355da1ebSSage Weil } else { 1641f5d55f03SJeff Layton in = ceph_get_inode(parent->d_sb, tvino); 1642ac1f12efSDan Carpenter if (IS_ERR(in)) { 1643355da1ebSSage Weil dout("new_inode badness\n"); 16442744c171SAl Viro d_drop(dn); 1645355da1ebSSage Weil dput(dn); 1646ac1f12efSDan Carpenter err = PTR_ERR(in); 1647355da1ebSSage Weil goto out; 1648355da1ebSSage Weil } 1649355da1ebSSage Weil } 1650355da1ebSSage Weil 16512a5beea3SYan, Zheng ret = fill_inode(in, NULL, &rde->inode, NULL, session, 1652355da1ebSSage Weil req->r_request_started, -1, 1653fdd4e158SYan, Zheng &req->r_caps_reservation); 1654fdd4e158SYan, Zheng if (ret < 0) { 1655355da1ebSSage Weil pr_err("fill_inode badness on %p\n", in); 16565495c2d0SYan, Zheng if (d_really_is_negative(dn)) 165786b58d13SYan, Zheng iput(in); 165886b58d13SYan, Zheng d_drop(dn); 1659fdd4e158SYan, Zheng err = ret; 1660d69ed05aSSage Weil goto next_item; 1661355da1ebSSage Weil } 166286b58d13SYan, Zheng 16632b0143b5SDavid Howells if (d_really_is_negative(dn)) { 1664315f2408SYan, Zheng struct dentry *realdn; 1665315f2408SYan, Zheng 1666315f2408SYan, Zheng if (ceph_security_xattr_deadlock(in)) { 1667315f2408SYan, Zheng dout(" skip splicing dn %p to inode %p" 1668315f2408SYan, Zheng " (security xattr deadlock)\n", dn, in); 1669315f2408SYan, Zheng iput(in); 1670315f2408SYan, Zheng skipped++; 1671315f2408SYan, Zheng goto next_item; 1672315f2408SYan, Zheng } 1673315f2408SYan, Zheng 1674315f2408SYan, Zheng realdn = splice_dentry(dn, in); 16755cba372cSYan, Zheng if (IS_ERR(realdn)) { 16765cba372cSYan, Zheng err = PTR_ERR(realdn); 16775cba372cSYan, Zheng d_drop(dn); 167886b58d13SYan, Zheng dn = NULL; 167986b58d13SYan, Zheng goto next_item; 168086b58d13SYan, Zheng } 16815cba372cSYan, Zheng dn = realdn; 168286b58d13SYan, Zheng } 168386b58d13SYan, Zheng 1684f3c4ebe6SYan, Zheng ceph_dentry(dn)->offset = rde->offset; 168586b58d13SYan, Zheng 1686f5d55f03SJeff Layton dvino = ceph_vino(d_inode(parent)); 16872a5beea3SYan, Zheng update_dentry_lease(dn, rde->lease, req->r_session, 1688f5d55f03SJeff Layton req->r_request_started, &tvino, &dvino); 1689fdd4e158SYan, Zheng 1690315f2408SYan, Zheng if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { 1691fdd4e158SYan, Zheng ret = fill_readdir_cache(d_inode(parent), dn, 1692fdd4e158SYan, Zheng &cache_ctl, req); 1693fdd4e158SYan, Zheng if (ret < 0) 1694fdd4e158SYan, Zheng err = ret; 1695fdd4e158SYan, Zheng } 1696d69ed05aSSage Weil next_item: 1697d69ed05aSSage Weil if (dn) 1698355da1ebSSage Weil dput(dn); 1699355da1ebSSage Weil } 1700355da1ebSSage Weil out: 1701315f2408SYan, Zheng if (err == 0 && skipped == 0) { 1702bc2de10dSJeff Layton set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); 1703fdd4e158SYan, Zheng req->r_readdir_cache_idx = cache_ctl.index; 1704fdd4e158SYan, Zheng } 1705fdd4e158SYan, Zheng ceph_readdir_cache_release(&cache_ctl); 1706355da1ebSSage Weil dout("readdir_prepopulate done\n"); 1707355da1ebSSage Weil return err; 1708355da1ebSSage Weil } 1709355da1ebSSage Weil 1710efb0ca76SYan, Zheng bool ceph_inode_set_size(struct inode *inode, loff_t size) 1711355da1ebSSage Weil { 1712355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1713efb0ca76SYan, Zheng bool ret; 1714355da1ebSSage Weil 1715be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1716355da1ebSSage Weil dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); 171799c88e69SYan, Zheng i_size_write(inode, size); 1718224a7542SYan, Zheng inode->i_blocks = calc_inode_blocks(size); 1719355da1ebSSage Weil 1720efb0ca76SYan, Zheng ret = __ceph_should_report_size(ci); 1721355da1ebSSage Weil 1722be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1723355da1ebSSage Weil return ret; 1724355da1ebSSage Weil } 1725355da1ebSSage Weil 1726355da1ebSSage Weil /* 1727355da1ebSSage Weil * Write back inode data in a worker thread. (This can't be done 1728355da1ebSSage Weil * in the message handler context.) 1729355da1ebSSage Weil */ 17303c6f6b79SSage Weil void ceph_queue_writeback(struct inode *inode) 17313c6f6b79SSage Weil { 173215a2015fSSage Weil ihold(inode); 17333c6f6b79SSage Weil if (queue_work(ceph_inode_to_client(inode)->wb_wq, 17343c6f6b79SSage Weil &ceph_inode(inode)->i_wb_work)) { 17352c27c9a5SSage Weil dout("ceph_queue_writeback %p\n", inode); 17363c6f6b79SSage Weil } else { 17372c27c9a5SSage Weil dout("ceph_queue_writeback %p failed\n", inode); 173815a2015fSSage Weil iput(inode); 17393c6f6b79SSage Weil } 17403c6f6b79SSage Weil } 17413c6f6b79SSage Weil 17423c6f6b79SSage Weil static void ceph_writeback_work(struct work_struct *work) 1743355da1ebSSage Weil { 1744355da1ebSSage Weil struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1745355da1ebSSage Weil i_wb_work); 1746355da1ebSSage Weil struct inode *inode = &ci->vfs_inode; 1747355da1ebSSage Weil 1748355da1ebSSage Weil dout("writeback %p\n", inode); 1749355da1ebSSage Weil filemap_fdatawrite(&inode->i_data); 1750355da1ebSSage Weil iput(inode); 1751355da1ebSSage Weil } 1752355da1ebSSage Weil 1753355da1ebSSage Weil /* 17543c6f6b79SSage Weil * queue an async invalidation 17553c6f6b79SSage Weil */ 17563c6f6b79SSage Weil void ceph_queue_invalidate(struct inode *inode) 17573c6f6b79SSage Weil { 175815a2015fSSage Weil ihold(inode); 17593c6f6b79SSage Weil if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, 17603c6f6b79SSage Weil &ceph_inode(inode)->i_pg_inv_work)) { 17613c6f6b79SSage Weil dout("ceph_queue_invalidate %p\n", inode); 17623c6f6b79SSage Weil } else { 17633c6f6b79SSage Weil dout("ceph_queue_invalidate %p failed\n", inode); 176415a2015fSSage Weil iput(inode); 17653c6f6b79SSage Weil } 17663c6f6b79SSage Weil } 17673c6f6b79SSage Weil 17683c6f6b79SSage Weil /* 1769355da1ebSSage Weil * Invalidate inode pages in a worker thread. (This can't be done 1770355da1ebSSage Weil * in the message handler context.) 1771355da1ebSSage Weil */ 17723c6f6b79SSage Weil static void ceph_invalidate_work(struct work_struct *work) 1773355da1ebSSage Weil { 1774355da1ebSSage Weil struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1775355da1ebSSage Weil i_pg_inv_work); 1776355da1ebSSage Weil struct inode *inode = &ci->vfs_inode; 17776c93df5dSYan, Zheng struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 1778355da1ebSSage Weil u32 orig_gen; 1779355da1ebSSage Weil int check = 0; 1780355da1ebSSage Weil 1781b0d7c223SYan, Zheng mutex_lock(&ci->i_truncate_mutex); 17826c93df5dSYan, Zheng 178352953d55SSeraphime Kirkovski if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { 17846c93df5dSYan, Zheng pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n", 17856c93df5dSYan, Zheng inode, ceph_ino(inode)); 17866c93df5dSYan, Zheng mapping_set_error(inode->i_mapping, -EIO); 17876c93df5dSYan, Zheng truncate_pagecache(inode, 0); 17886c93df5dSYan, Zheng mutex_unlock(&ci->i_truncate_mutex); 17896c93df5dSYan, Zheng goto out; 17906c93df5dSYan, Zheng } 17916c93df5dSYan, Zheng 1792be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1793355da1ebSSage Weil dout("invalidate_pages %p gen %d revoking %d\n", inode, 1794355da1ebSSage Weil ci->i_rdcache_gen, ci->i_rdcache_revoking); 1795cd045cb4SSage Weil if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 17969563f88cSYan, Zheng if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 17979563f88cSYan, Zheng check = 1; 1798be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1799b0d7c223SYan, Zheng mutex_unlock(&ci->i_truncate_mutex); 1800355da1ebSSage Weil goto out; 1801355da1ebSSage Weil } 1802355da1ebSSage Weil orig_gen = ci->i_rdcache_gen; 1803be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1804355da1ebSSage Weil 18059abd4db7SYan, Zheng if (invalidate_inode_pages2(inode->i_mapping) < 0) { 18069abd4db7SYan, Zheng pr_err("invalidate_pages %p fails\n", inode); 18079abd4db7SYan, Zheng } 1808355da1ebSSage Weil 1809be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1810cd045cb4SSage Weil if (orig_gen == ci->i_rdcache_gen && 1811cd045cb4SSage Weil orig_gen == ci->i_rdcache_revoking) { 1812355da1ebSSage Weil dout("invalidate_pages %p gen %d successful\n", inode, 1813355da1ebSSage Weil ci->i_rdcache_gen); 1814cd045cb4SSage Weil ci->i_rdcache_revoking--; 1815355da1ebSSage Weil check = 1; 1816355da1ebSSage Weil } else { 1817cd045cb4SSage Weil dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", 1818cd045cb4SSage Weil inode, orig_gen, ci->i_rdcache_gen, 1819cd045cb4SSage Weil ci->i_rdcache_revoking); 18209563f88cSYan, Zheng if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 18219563f88cSYan, Zheng check = 1; 1822355da1ebSSage Weil } 1823be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1824b0d7c223SYan, Zheng mutex_unlock(&ci->i_truncate_mutex); 18259563f88cSYan, Zheng out: 1826355da1ebSSage Weil if (check) 1827355da1ebSSage Weil ceph_check_caps(ci, 0, NULL); 1828355da1ebSSage Weil iput(inode); 1829355da1ebSSage Weil } 1830355da1ebSSage Weil 1831355da1ebSSage Weil 1832355da1ebSSage Weil /* 18333f99969fSYan, Zheng * called by trunc_wq; 1834355da1ebSSage Weil * 1835355da1ebSSage Weil * We also truncate in a separate thread as well. 1836355da1ebSSage Weil */ 18373c6f6b79SSage Weil static void ceph_vmtruncate_work(struct work_struct *work) 1838355da1ebSSage Weil { 1839355da1ebSSage Weil struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1840355da1ebSSage Weil i_vmtruncate_work); 1841355da1ebSSage Weil struct inode *inode = &ci->vfs_inode; 1842355da1ebSSage Weil 1843355da1ebSSage Weil dout("vmtruncate_work %p\n", inode); 1844b415bf4fSYan, Zheng __ceph_do_pending_vmtruncate(inode); 1845355da1ebSSage Weil iput(inode); 1846355da1ebSSage Weil } 1847355da1ebSSage Weil 1848355da1ebSSage Weil /* 18493c6f6b79SSage Weil * Queue an async vmtruncate. If we fail to queue work, we will handle 18503c6f6b79SSage Weil * the truncation the next time we call __ceph_do_pending_vmtruncate. 18513c6f6b79SSage Weil */ 18523c6f6b79SSage Weil void ceph_queue_vmtruncate(struct inode *inode) 18533c6f6b79SSage Weil { 18543c6f6b79SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 18553c6f6b79SSage Weil 185615a2015fSSage Weil ihold(inode); 185799ccbd22SMilosz Tanski 1858640ef79dSCheng Renquan if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, 18593c6f6b79SSage Weil &ci->i_vmtruncate_work)) { 18603c6f6b79SSage Weil dout("ceph_queue_vmtruncate %p\n", inode); 18613c6f6b79SSage Weil } else { 18623c6f6b79SSage Weil dout("ceph_queue_vmtruncate %p failed, pending=%d\n", 18633c6f6b79SSage Weil inode, ci->i_truncate_pending); 186415a2015fSSage Weil iput(inode); 18653c6f6b79SSage Weil } 18663c6f6b79SSage Weil } 18673c6f6b79SSage Weil 18683c6f6b79SSage Weil /* 1869355da1ebSSage Weil * Make sure any pending truncation is applied before doing anything 1870355da1ebSSage Weil * that may depend on it. 1871355da1ebSSage Weil */ 1872b415bf4fSYan, Zheng void __ceph_do_pending_vmtruncate(struct inode *inode) 1873355da1ebSSage Weil { 1874355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1875355da1ebSSage Weil u64 to; 1876a85f50b6SYan, Zheng int wrbuffer_refs, finish = 0; 1877355da1ebSSage Weil 1878b0d7c223SYan, Zheng mutex_lock(&ci->i_truncate_mutex); 1879355da1ebSSage Weil retry: 1880be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1881355da1ebSSage Weil if (ci->i_truncate_pending == 0) { 1882355da1ebSSage Weil dout("__do_pending_vmtruncate %p none pending\n", inode); 1883be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1884b0d7c223SYan, Zheng mutex_unlock(&ci->i_truncate_mutex); 1885355da1ebSSage Weil return; 1886355da1ebSSage Weil } 1887355da1ebSSage Weil 1888355da1ebSSage Weil /* 1889355da1ebSSage Weil * make sure any dirty snapped pages are flushed before we 1890355da1ebSSage Weil * possibly truncate them.. so write AND block! 1891355da1ebSSage Weil */ 1892355da1ebSSage Weil if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 1893c8fd0d37SYan, Zheng spin_unlock(&ci->i_ceph_lock); 1894355da1ebSSage Weil dout("__do_pending_vmtruncate %p flushing snaps first\n", 1895355da1ebSSage Weil inode); 1896355da1ebSSage Weil filemap_write_and_wait_range(&inode->i_data, 0, 1897355da1ebSSage Weil inode->i_sb->s_maxbytes); 1898355da1ebSSage Weil goto retry; 1899355da1ebSSage Weil } 1900355da1ebSSage Weil 1901b0d7c223SYan, Zheng /* there should be no reader or writer */ 1902b0d7c223SYan, Zheng WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 1903b0d7c223SYan, Zheng 1904355da1ebSSage Weil to = ci->i_truncate_size; 1905355da1ebSSage Weil wrbuffer_refs = ci->i_wrbuffer_ref; 1906355da1ebSSage Weil dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, 1907355da1ebSSage Weil ci->i_truncate_pending, to); 1908be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1909355da1ebSSage Weil 19104e217b5dSYan, Zheng truncate_pagecache(inode, to); 1911355da1ebSSage Weil 1912be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1913a85f50b6SYan, Zheng if (to == ci->i_truncate_size) { 1914a85f50b6SYan, Zheng ci->i_truncate_pending = 0; 1915a85f50b6SYan, Zheng finish = 1; 1916a85f50b6SYan, Zheng } 1917be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 1918a85f50b6SYan, Zheng if (!finish) 1919a85f50b6SYan, Zheng goto retry; 1920355da1ebSSage Weil 1921b0d7c223SYan, Zheng mutex_unlock(&ci->i_truncate_mutex); 1922b0d7c223SYan, Zheng 1923355da1ebSSage Weil if (wrbuffer_refs == 0) 1924355da1ebSSage Weil ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); 1925a85f50b6SYan, Zheng 192603066f23SYehuda Sadeh wake_up_all(&ci->i_cap_wq); 1927355da1ebSSage Weil } 1928355da1ebSSage Weil 1929355da1ebSSage Weil /* 1930355da1ebSSage Weil * symlinks 1931355da1ebSSage Weil */ 1932355da1ebSSage Weil static const struct inode_operations ceph_symlink_iops = { 19336b255391SAl Viro .get_link = simple_get_link, 19340b932672SYan, Zheng .setattr = ceph_setattr, 19350b932672SYan, Zheng .getattr = ceph_getattr, 19360b932672SYan, Zheng .listxattr = ceph_listxattr, 1937355da1ebSSage Weil }; 1938355da1ebSSage Weil 1939a26feccaSAndreas Gruenbacher int __ceph_setattr(struct inode *inode, struct iattr *attr) 1940355da1ebSSage Weil { 1941355da1ebSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 1942355da1ebSSage Weil const unsigned int ia_valid = attr->ia_valid; 1943355da1ebSSage Weil struct ceph_mds_request *req; 1944a26feccaSAndreas Gruenbacher struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 1945f66fd9f0SYan, Zheng struct ceph_cap_flush *prealloc_cf; 1946355da1ebSSage Weil int issued; 1947355da1ebSSage Weil int release = 0, dirtied = 0; 1948355da1ebSSage Weil int mask = 0; 1949355da1ebSSage Weil int err = 0; 1950fca65b4aSSage Weil int inode_dirty_flags = 0; 1951604d1b02SYan, Zheng bool lock_snap_rwsem = false; 1952355da1ebSSage Weil 1953f66fd9f0SYan, Zheng prealloc_cf = ceph_alloc_cap_flush(); 1954f66fd9f0SYan, Zheng if (!prealloc_cf) 1955f66fd9f0SYan, Zheng return -ENOMEM; 1956f66fd9f0SYan, Zheng 1957355da1ebSSage Weil req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 1958355da1ebSSage Weil USE_AUTH_MDS); 1959f66fd9f0SYan, Zheng if (IS_ERR(req)) { 1960f66fd9f0SYan, Zheng ceph_free_cap_flush(prealloc_cf); 1961355da1ebSSage Weil return PTR_ERR(req); 1962f66fd9f0SYan, Zheng } 1963355da1ebSSage Weil 1964be655596SSage Weil spin_lock(&ci->i_ceph_lock); 1965355da1ebSSage Weil issued = __ceph_caps_issued(ci, NULL); 1966604d1b02SYan, Zheng 1967604d1b02SYan, Zheng if (!ci->i_head_snapc && 1968604d1b02SYan, Zheng (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { 1969604d1b02SYan, Zheng lock_snap_rwsem = true; 1970604d1b02SYan, Zheng if (!down_read_trylock(&mdsc->snap_rwsem)) { 1971604d1b02SYan, Zheng spin_unlock(&ci->i_ceph_lock); 1972604d1b02SYan, Zheng down_read(&mdsc->snap_rwsem); 1973604d1b02SYan, Zheng spin_lock(&ci->i_ceph_lock); 1974604d1b02SYan, Zheng issued = __ceph_caps_issued(ci, NULL); 1975604d1b02SYan, Zheng } 1976604d1b02SYan, Zheng } 1977604d1b02SYan, Zheng 1978355da1ebSSage Weil dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); 1979355da1ebSSage Weil 1980355da1ebSSage Weil if (ia_valid & ATTR_UID) { 1981355da1ebSSage Weil dout("setattr %p uid %d -> %d\n", inode, 1982bd2bae6aSEric W. Biederman from_kuid(&init_user_ns, inode->i_uid), 1983bd2bae6aSEric W. Biederman from_kuid(&init_user_ns, attr->ia_uid)); 1984355da1ebSSage Weil if (issued & CEPH_CAP_AUTH_EXCL) { 1985355da1ebSSage Weil inode->i_uid = attr->ia_uid; 1986355da1ebSSage Weil dirtied |= CEPH_CAP_AUTH_EXCL; 1987355da1ebSSage Weil } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 1988ab871b90SEric W. Biederman !uid_eq(attr->ia_uid, inode->i_uid)) { 1989ab871b90SEric W. Biederman req->r_args.setattr.uid = cpu_to_le32( 1990ab871b90SEric W. Biederman from_kuid(&init_user_ns, attr->ia_uid)); 1991355da1ebSSage Weil mask |= CEPH_SETATTR_UID; 1992355da1ebSSage Weil release |= CEPH_CAP_AUTH_SHARED; 1993355da1ebSSage Weil } 1994355da1ebSSage Weil } 1995355da1ebSSage Weil if (ia_valid & ATTR_GID) { 1996355da1ebSSage Weil dout("setattr %p gid %d -> %d\n", inode, 1997bd2bae6aSEric W. Biederman from_kgid(&init_user_ns, inode->i_gid), 1998bd2bae6aSEric W. Biederman from_kgid(&init_user_ns, attr->ia_gid)); 1999355da1ebSSage Weil if (issued & CEPH_CAP_AUTH_EXCL) { 2000355da1ebSSage Weil inode->i_gid = attr->ia_gid; 2001355da1ebSSage Weil dirtied |= CEPH_CAP_AUTH_EXCL; 2002355da1ebSSage Weil } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2003ab871b90SEric W. Biederman !gid_eq(attr->ia_gid, inode->i_gid)) { 2004ab871b90SEric W. Biederman req->r_args.setattr.gid = cpu_to_le32( 2005ab871b90SEric W. Biederman from_kgid(&init_user_ns, attr->ia_gid)); 2006355da1ebSSage Weil mask |= CEPH_SETATTR_GID; 2007355da1ebSSage Weil release |= CEPH_CAP_AUTH_SHARED; 2008355da1ebSSage Weil } 2009355da1ebSSage Weil } 2010355da1ebSSage Weil if (ia_valid & ATTR_MODE) { 2011355da1ebSSage Weil dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, 2012355da1ebSSage Weil attr->ia_mode); 2013355da1ebSSage Weil if (issued & CEPH_CAP_AUTH_EXCL) { 2014355da1ebSSage Weil inode->i_mode = attr->ia_mode; 2015355da1ebSSage Weil dirtied |= CEPH_CAP_AUTH_EXCL; 2016355da1ebSSage Weil } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2017355da1ebSSage Weil attr->ia_mode != inode->i_mode) { 20187221fe4cSGuangliang Zhao inode->i_mode = attr->ia_mode; 2019355da1ebSSage Weil req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 2020355da1ebSSage Weil mask |= CEPH_SETATTR_MODE; 2021355da1ebSSage Weil release |= CEPH_CAP_AUTH_SHARED; 2022355da1ebSSage Weil } 2023355da1ebSSage Weil } 2024355da1ebSSage Weil 2025355da1ebSSage Weil if (ia_valid & ATTR_ATIME) { 2026355da1ebSSage Weil dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, 2027355da1ebSSage Weil inode->i_atime.tv_sec, inode->i_atime.tv_nsec, 2028355da1ebSSage Weil attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 2029355da1ebSSage Weil if (issued & CEPH_CAP_FILE_EXCL) { 2030355da1ebSSage Weil ci->i_time_warp_seq++; 2031355da1ebSSage Weil inode->i_atime = attr->ia_atime; 2032355da1ebSSage Weil dirtied |= CEPH_CAP_FILE_EXCL; 2033355da1ebSSage Weil } else if ((issued & CEPH_CAP_FILE_WR) && 2034355da1ebSSage Weil timespec_compare(&inode->i_atime, 2035355da1ebSSage Weil &attr->ia_atime) < 0) { 2036355da1ebSSage Weil inode->i_atime = attr->ia_atime; 2037355da1ebSSage Weil dirtied |= CEPH_CAP_FILE_WR; 2038355da1ebSSage Weil } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2039355da1ebSSage Weil !timespec_equal(&inode->i_atime, &attr->ia_atime)) { 2040355da1ebSSage Weil ceph_encode_timespec(&req->r_args.setattr.atime, 2041355da1ebSSage Weil &attr->ia_atime); 2042355da1ebSSage Weil mask |= CEPH_SETATTR_ATIME; 2043be70489eSYan, Zheng release |= CEPH_CAP_FILE_SHARED | 2044be70489eSYan, Zheng CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2045355da1ebSSage Weil } 2046355da1ebSSage Weil } 2047355da1ebSSage Weil if (ia_valid & ATTR_MTIME) { 2048355da1ebSSage Weil dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, 2049355da1ebSSage Weil inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 2050355da1ebSSage Weil attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 2051355da1ebSSage Weil if (issued & CEPH_CAP_FILE_EXCL) { 2052355da1ebSSage Weil ci->i_time_warp_seq++; 2053355da1ebSSage Weil inode->i_mtime = attr->ia_mtime; 2054355da1ebSSage Weil dirtied |= CEPH_CAP_FILE_EXCL; 2055355da1ebSSage Weil } else if ((issued & CEPH_CAP_FILE_WR) && 2056355da1ebSSage Weil timespec_compare(&inode->i_mtime, 2057355da1ebSSage Weil &attr->ia_mtime) < 0) { 2058355da1ebSSage Weil inode->i_mtime = attr->ia_mtime; 2059355da1ebSSage Weil dirtied |= CEPH_CAP_FILE_WR; 2060355da1ebSSage Weil } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2061355da1ebSSage Weil !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { 2062355da1ebSSage Weil ceph_encode_timespec(&req->r_args.setattr.mtime, 2063355da1ebSSage Weil &attr->ia_mtime); 2064355da1ebSSage Weil mask |= CEPH_SETATTR_MTIME; 2065be70489eSYan, Zheng release |= CEPH_CAP_FILE_SHARED | 2066be70489eSYan, Zheng CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2067355da1ebSSage Weil } 2068355da1ebSSage Weil } 2069355da1ebSSage Weil if (ia_valid & ATTR_SIZE) { 2070355da1ebSSage Weil dout("setattr %p size %lld -> %lld\n", inode, 2071355da1ebSSage Weil inode->i_size, attr->ia_size); 2072355da1ebSSage Weil if ((issued & CEPH_CAP_FILE_EXCL) && 2073355da1ebSSage Weil attr->ia_size > inode->i_size) { 207499c88e69SYan, Zheng i_size_write(inode, attr->ia_size); 2075224a7542SYan, Zheng inode->i_blocks = calc_inode_blocks(attr->ia_size); 2076355da1ebSSage Weil ci->i_reported_size = attr->ia_size; 2077355da1ebSSage Weil dirtied |= CEPH_CAP_FILE_EXCL; 2078355da1ebSSage Weil } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2079355da1ebSSage Weil attr->ia_size != inode->i_size) { 2080355da1ebSSage Weil req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 2081355da1ebSSage Weil req->r_args.setattr.old_size = 2082355da1ebSSage Weil cpu_to_le64(inode->i_size); 2083355da1ebSSage Weil mask |= CEPH_SETATTR_SIZE; 2084be70489eSYan, Zheng release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2085be70489eSYan, Zheng CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2086355da1ebSSage Weil } 2087355da1ebSSage Weil } 2088355da1ebSSage Weil 2089355da1ebSSage Weil /* these do nothing */ 2090355da1ebSSage Weil if (ia_valid & ATTR_CTIME) { 2091355da1ebSSage Weil bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 2092355da1ebSSage Weil ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 2093355da1ebSSage Weil dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, 2094355da1ebSSage Weil inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 2095355da1ebSSage Weil attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 2096355da1ebSSage Weil only ? "ctime only" : "ignored"); 2097355da1ebSSage Weil if (only) { 2098355da1ebSSage Weil /* 2099355da1ebSSage Weil * if kernel wants to dirty ctime but nothing else, 2100355da1ebSSage Weil * we need to choose a cap to dirty under, or do 2101355da1ebSSage Weil * a almost-no-op setattr 2102355da1ebSSage Weil */ 2103355da1ebSSage Weil if (issued & CEPH_CAP_AUTH_EXCL) 2104355da1ebSSage Weil dirtied |= CEPH_CAP_AUTH_EXCL; 2105355da1ebSSage Weil else if (issued & CEPH_CAP_FILE_EXCL) 2106355da1ebSSage Weil dirtied |= CEPH_CAP_FILE_EXCL; 2107355da1ebSSage Weil else if (issued & CEPH_CAP_XATTR_EXCL) 2108355da1ebSSage Weil dirtied |= CEPH_CAP_XATTR_EXCL; 2109355da1ebSSage Weil else 2110355da1ebSSage Weil mask |= CEPH_SETATTR_CTIME; 2111355da1ebSSage Weil } 2112355da1ebSSage Weil } 2113355da1ebSSage Weil if (ia_valid & ATTR_FILE) 2114355da1ebSSage Weil dout("setattr %p ATTR_FILE ... hrm!\n", inode); 2115355da1ebSSage Weil 2116355da1ebSSage Weil if (dirtied) { 2117f66fd9f0SYan, Zheng inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, 2118f66fd9f0SYan, Zheng &prealloc_cf); 21194ca2fea6SYan, Zheng inode->i_ctime = attr->ia_ctime; 2120355da1ebSSage Weil } 2121355da1ebSSage Weil 2122355da1ebSSage Weil release &= issued; 2123be655596SSage Weil spin_unlock(&ci->i_ceph_lock); 2124604d1b02SYan, Zheng if (lock_snap_rwsem) 2125604d1b02SYan, Zheng up_read(&mdsc->snap_rwsem); 2126355da1ebSSage Weil 2127fca65b4aSSage Weil if (inode_dirty_flags) 2128fca65b4aSSage Weil __mark_inode_dirty(inode, inode_dirty_flags); 2129fca65b4aSSage Weil 21307221fe4cSGuangliang Zhao 2131355da1ebSSage Weil if (mask) { 213270b666c3SSage Weil req->r_inode = inode; 213370b666c3SSage Weil ihold(inode); 2134355da1ebSSage Weil req->r_inode_drop = release; 2135355da1ebSSage Weil req->r_args.setattr.mask = cpu_to_le32(mask); 2136355da1ebSSage Weil req->r_num_caps = 1; 21374ca2fea6SYan, Zheng req->r_stamp = attr->ia_ctime; 2138752c8bdcSSage Weil err = ceph_mdsc_do_request(mdsc, NULL, req); 2139355da1ebSSage Weil } 2140355da1ebSSage Weil dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, 2141355da1ebSSage Weil ceph_cap_string(dirtied), mask); 2142355da1ebSSage Weil 2143355da1ebSSage Weil ceph_mdsc_put_request(req); 21448179a101SYan, Zheng ceph_free_cap_flush(prealloc_cf); 21458179a101SYan, Zheng 21468179a101SYan, Zheng if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) 2147b415bf4fSYan, Zheng __ceph_do_pending_vmtruncate(inode); 21488179a101SYan, Zheng 2149355da1ebSSage Weil return err; 2150355da1ebSSage Weil } 2151355da1ebSSage Weil 2152355da1ebSSage Weil /* 2153a26feccaSAndreas Gruenbacher * setattr 2154a26feccaSAndreas Gruenbacher */ 2155a26feccaSAndreas Gruenbacher int ceph_setattr(struct dentry *dentry, struct iattr *attr) 2156a26feccaSAndreas Gruenbacher { 2157fd5472edSJan Kara struct inode *inode = d_inode(dentry); 2158fd5472edSJan Kara int err; 2159fd5472edSJan Kara 2160fd5472edSJan Kara if (ceph_snap(inode) != CEPH_NOSNAP) 2161fd5472edSJan Kara return -EROFS; 2162fd5472edSJan Kara 216331051c85SJan Kara err = setattr_prepare(dentry, attr); 2164fd5472edSJan Kara if (err != 0) 2165fd5472edSJan Kara return err; 2166fd5472edSJan Kara 21672b83845fSLuis Henriques if ((attr->ia_valid & ATTR_SIZE) && 21682b83845fSLuis Henriques ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) 21692b83845fSLuis Henriques return -EDQUOT; 21702b83845fSLuis Henriques 21718179a101SYan, Zheng err = __ceph_setattr(inode, attr); 21728179a101SYan, Zheng 21738179a101SYan, Zheng if (err >= 0 && (attr->ia_valid & ATTR_MODE)) 21748179a101SYan, Zheng err = posix_acl_chmod(inode, attr->ia_mode); 21758179a101SYan, Zheng 21768179a101SYan, Zheng return err; 2177a26feccaSAndreas Gruenbacher } 2178a26feccaSAndreas Gruenbacher 2179a26feccaSAndreas Gruenbacher /* 2180355da1ebSSage Weil * Verify that we have a lease on the given mask. If not, 2181355da1ebSSage Weil * do a getattr against an mds. 2182355da1ebSSage Weil */ 218301deead0SYan, Zheng int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 218401deead0SYan, Zheng int mask, bool force) 2185355da1ebSSage Weil { 21863d14c5d2SYehuda Sadeh struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 21873d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc = fsc->mdsc; 2188355da1ebSSage Weil struct ceph_mds_request *req; 218949a9f4f6SYan, Zheng int mode; 2190355da1ebSSage Weil int err; 2191355da1ebSSage Weil 2192355da1ebSSage Weil if (ceph_snap(inode) == CEPH_SNAPDIR) { 2193355da1ebSSage Weil dout("do_getattr inode %p SNAPDIR\n", inode); 2194355da1ebSSage Weil return 0; 2195355da1ebSSage Weil } 2196355da1ebSSage Weil 219701deead0SYan, Zheng dout("do_getattr inode %p mask %s mode 0%o\n", 219801deead0SYan, Zheng inode, ceph_cap_string(mask), inode->i_mode); 2199508b32d8SYan, Zheng if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) 2200355da1ebSSage Weil return 0; 2201355da1ebSSage Weil 220249a9f4f6SYan, Zheng mode = (mask & CEPH_STAT_RSTAT) ? USE_AUTH_MDS : USE_ANY_MDS; 220349a9f4f6SYan, Zheng req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); 2204355da1ebSSage Weil if (IS_ERR(req)) 2205355da1ebSSage Weil return PTR_ERR(req); 220670b666c3SSage Weil req->r_inode = inode; 220770b666c3SSage Weil ihold(inode); 2208355da1ebSSage Weil req->r_num_caps = 1; 2209355da1ebSSage Weil req->r_args.getattr.mask = cpu_to_le32(mask); 221001deead0SYan, Zheng req->r_locked_page = locked_page; 2211355da1ebSSage Weil err = ceph_mdsc_do_request(mdsc, NULL, req); 221201deead0SYan, Zheng if (locked_page && err == 0) { 221301deead0SYan, Zheng u64 inline_version = req->r_reply_info.targeti.inline_version; 221401deead0SYan, Zheng if (inline_version == 0) { 221501deead0SYan, Zheng /* the reply is supposed to contain inline data */ 221601deead0SYan, Zheng err = -EINVAL; 221701deead0SYan, Zheng } else if (inline_version == CEPH_INLINE_NONE) { 221801deead0SYan, Zheng err = -ENODATA; 221901deead0SYan, Zheng } else { 222001deead0SYan, Zheng err = req->r_reply_info.targeti.inline_len; 222101deead0SYan, Zheng } 222201deead0SYan, Zheng } 2223355da1ebSSage Weil ceph_mdsc_put_request(req); 2224355da1ebSSage Weil dout("do_getattr result=%d\n", err); 2225355da1ebSSage Weil return err; 2226355da1ebSSage Weil } 2227355da1ebSSage Weil 2228355da1ebSSage Weil 2229355da1ebSSage Weil /* 2230355da1ebSSage Weil * Check inode permissions. We verify we have a valid value for 2231355da1ebSSage Weil * the AUTH cap, then call the generic handler. 2232355da1ebSSage Weil */ 223310556cb2SAl Viro int ceph_permission(struct inode *inode, int mask) 2234355da1ebSSage Weil { 2235b74c79e9SNick Piggin int err; 2236b74c79e9SNick Piggin 223710556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 2238b74c79e9SNick Piggin return -ECHILD; 2239b74c79e9SNick Piggin 2240508b32d8SYan, Zheng err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); 2241355da1ebSSage Weil 2242355da1ebSSage Weil if (!err) 22432830ba7fSAl Viro err = generic_permission(inode, mask); 2244355da1ebSSage Weil return err; 2245355da1ebSSage Weil } 2246355da1ebSSage Weil 2247355da1ebSSage Weil /* 2248355da1ebSSage Weil * Get all attributes. Hopefully somedata we'll have a statlite() 2249355da1ebSSage Weil * and can limit the fields we require to be accurate. 2250355da1ebSSage Weil */ 2251a528d35eSDavid Howells int ceph_getattr(const struct path *path, struct kstat *stat, 2252a528d35eSDavid Howells u32 request_mask, unsigned int flags) 2253355da1ebSSage Weil { 2254a528d35eSDavid Howells struct inode *inode = d_inode(path->dentry); 2255232d4b01SSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 2256355da1ebSSage Weil int err; 2257355da1ebSSage Weil 2258508b32d8SYan, Zheng err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false); 2259355da1ebSSage Weil if (!err) { 2260355da1ebSSage Weil generic_fillattr(inode, stat); 2261ad1fee96SYehuda Sadeh stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); 2262355da1ebSSage Weil if (ceph_snap(inode) != CEPH_NOSNAP) 2263355da1ebSSage Weil stat->dev = ceph_snap(inode); 2264355da1ebSSage Weil else 2265355da1ebSSage Weil stat->dev = 0; 2266232d4b01SSage Weil if (S_ISDIR(inode->i_mode)) { 22671c1266bbSYehuda Sadeh if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), 22681c1266bbSYehuda Sadeh RBYTES)) 2269232d4b01SSage Weil stat->size = ci->i_rbytes; 22701c1266bbSYehuda Sadeh else 22711c1266bbSYehuda Sadeh stat->size = ci->i_files + ci->i_subdirs; 2272232d4b01SSage Weil stat->blocks = 0; 2273355da1ebSSage Weil stat->blksize = 65536; 2274355da1ebSSage Weil } 2275232d4b01SSage Weil } 2276355da1ebSSage Weil return err; 2277355da1ebSSage Weil } 2278