![Yan, Zheng](/assets/img/avatar_default.png)
Readdir cache keeps array of dentry pointers in page cache. If any dentry in readdir cache gets pruned, ceph_d_prune() disables readdir cache for later readdir syscall. The problem is that ceph_d_prune() ignores unhashed dentry. Ideally MDS should have already revoked CEPH_CAP_FILE_SHARED (which also disables readdir cache) when dentry gets unhashed. But if it is somehow MDS does not properly revoke CEPH_CAP_FILE_SHARED and the unhashed dentry gets pruned later, ceph_d_prune() will not disable readdir cache, later readdir may reference invalid dentry pointer. The fix is make ceph_d_prune() do extra check for unhashed dentry. Disable readdir cache if the unhashed dentry is still referenced by readdir cache. Another fix in this patch is handle d_splice_alias(). If a dentry gets spliced into new parent dentry, treat it as if it was pruned (call ceph_d_prune() for it). Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2260 lines
61 KiB
C
2260 lines
61 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ceph/ceph_debug.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/uaccess.h>
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#include <linux/kernel.h>
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#include <linux/writeback.h>
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#include <linux/vmalloc.h>
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#include <linux/xattr.h>
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#include <linux/posix_acl.h>
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#include <linux/random.h>
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#include <linux/sort.h>
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#include "super.h"
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#include "mds_client.h"
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#include "cache.h"
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#include <linux/ceph/decode.h>
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/*
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* Ceph inode operations
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*
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* Implement basic inode helpers (get, alloc) and inode ops (getattr,
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* setattr, etc.), xattr helpers, and helpers for assimilating
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* metadata returned by the MDS into our cache.
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*
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* Also define helpers for doing asynchronous writeback, invalidation,
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* and truncation for the benefit of those who can't afford to block
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* (typically because they are in the message handler path).
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*/
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static const struct inode_operations ceph_symlink_iops;
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static void ceph_invalidate_work(struct work_struct *work);
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static void ceph_writeback_work(struct work_struct *work);
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static void ceph_vmtruncate_work(struct work_struct *work);
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/*
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* find or create an inode, given the ceph ino number
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*/
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static int ceph_set_ino_cb(struct inode *inode, void *data)
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{
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ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
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inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
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return 0;
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}
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struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
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{
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struct inode *inode;
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ino_t t = ceph_vino_to_ino(vino);
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inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
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if (!inode)
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return ERR_PTR(-ENOMEM);
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if (inode->i_state & I_NEW) {
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dout("get_inode created new inode %p %llx.%llx ino %llx\n",
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inode, ceph_vinop(inode), (u64)inode->i_ino);
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unlock_new_inode(inode);
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}
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dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
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vino.snap, inode);
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return inode;
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}
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/*
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* get/constuct snapdir inode for a given directory
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*/
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struct inode *ceph_get_snapdir(struct inode *parent)
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{
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struct ceph_vino vino = {
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.ino = ceph_ino(parent),
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.snap = CEPH_SNAPDIR,
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};
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struct inode *inode = ceph_get_inode(parent->i_sb, vino);
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struct ceph_inode_info *ci = ceph_inode(inode);
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BUG_ON(!S_ISDIR(parent->i_mode));
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if (IS_ERR(inode))
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return inode;
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inode->i_mode = parent->i_mode;
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inode->i_uid = parent->i_uid;
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inode->i_gid = parent->i_gid;
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inode->i_op = &ceph_snapdir_iops;
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inode->i_fop = &ceph_snapdir_fops;
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ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
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ci->i_rbytes = 0;
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return inode;
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}
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const struct inode_operations ceph_file_iops = {
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.permission = ceph_permission,
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.setattr = ceph_setattr,
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.getattr = ceph_getattr,
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.listxattr = ceph_listxattr,
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.get_acl = ceph_get_acl,
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.set_acl = ceph_set_acl,
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};
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/*
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* We use a 'frag tree' to keep track of the MDS's directory fragments
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* for a given inode (usually there is just a single fragment). We
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* need to know when a child frag is delegated to a new MDS, or when
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* it is flagged as replicated, so we can direct our requests
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* accordingly.
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*/
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/*
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* find/create a frag in the tree
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*/
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static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
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u32 f)
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{
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struct rb_node **p;
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struct rb_node *parent = NULL;
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struct ceph_inode_frag *frag;
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int c;
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p = &ci->i_fragtree.rb_node;
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while (*p) {
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parent = *p;
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frag = rb_entry(parent, struct ceph_inode_frag, node);
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c = ceph_frag_compare(f, frag->frag);
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if (c < 0)
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p = &(*p)->rb_left;
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else if (c > 0)
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p = &(*p)->rb_right;
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else
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return frag;
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}
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frag = kmalloc(sizeof(*frag), GFP_NOFS);
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if (!frag)
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return ERR_PTR(-ENOMEM);
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frag->frag = f;
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frag->split_by = 0;
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frag->mds = -1;
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frag->ndist = 0;
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rb_link_node(&frag->node, parent, p);
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rb_insert_color(&frag->node, &ci->i_fragtree);
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dout("get_or_create_frag added %llx.%llx frag %x\n",
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ceph_vinop(&ci->vfs_inode), f);
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return frag;
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}
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/*
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* find a specific frag @f
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*/
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struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
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{
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struct rb_node *n = ci->i_fragtree.rb_node;
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while (n) {
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struct ceph_inode_frag *frag =
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rb_entry(n, struct ceph_inode_frag, node);
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int c = ceph_frag_compare(f, frag->frag);
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if (c < 0)
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n = n->rb_left;
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else if (c > 0)
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n = n->rb_right;
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else
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return frag;
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}
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return NULL;
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}
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/*
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* Choose frag containing the given value @v. If @pfrag is
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* specified, copy the frag delegation info to the caller if
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* it is present.
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*/
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static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
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struct ceph_inode_frag *pfrag, int *found)
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{
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u32 t = ceph_frag_make(0, 0);
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struct ceph_inode_frag *frag;
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unsigned nway, i;
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u32 n;
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if (found)
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*found = 0;
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while (1) {
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WARN_ON(!ceph_frag_contains_value(t, v));
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frag = __ceph_find_frag(ci, t);
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if (!frag)
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break; /* t is a leaf */
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if (frag->split_by == 0) {
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if (pfrag)
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memcpy(pfrag, frag, sizeof(*pfrag));
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if (found)
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*found = 1;
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break;
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}
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/* choose child */
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nway = 1 << frag->split_by;
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dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
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frag->split_by, nway);
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for (i = 0; i < nway; i++) {
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n = ceph_frag_make_child(t, frag->split_by, i);
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if (ceph_frag_contains_value(n, v)) {
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t = n;
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break;
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}
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}
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BUG_ON(i == nway);
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}
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dout("choose_frag(%x) = %x\n", v, t);
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return t;
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}
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u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
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struct ceph_inode_frag *pfrag, int *found)
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{
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u32 ret;
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mutex_lock(&ci->i_fragtree_mutex);
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ret = __ceph_choose_frag(ci, v, pfrag, found);
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mutex_unlock(&ci->i_fragtree_mutex);
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return ret;
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}
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/*
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* Process dirfrag (delegation) info from the mds. Include leaf
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* fragment in tree ONLY if ndist > 0. Otherwise, only
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* branches/splits are included in i_fragtree)
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*/
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static int ceph_fill_dirfrag(struct inode *inode,
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struct ceph_mds_reply_dirfrag *dirinfo)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct ceph_inode_frag *frag;
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u32 id = le32_to_cpu(dirinfo->frag);
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int mds = le32_to_cpu(dirinfo->auth);
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int ndist = le32_to_cpu(dirinfo->ndist);
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int diri_auth = -1;
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int i;
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int err = 0;
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spin_lock(&ci->i_ceph_lock);
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if (ci->i_auth_cap)
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diri_auth = ci->i_auth_cap->mds;
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spin_unlock(&ci->i_ceph_lock);
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if (mds == -1) /* CDIR_AUTH_PARENT */
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mds = diri_auth;
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mutex_lock(&ci->i_fragtree_mutex);
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if (ndist == 0 && mds == diri_auth) {
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/* no delegation info needed. */
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frag = __ceph_find_frag(ci, id);
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if (!frag)
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goto out;
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if (frag->split_by == 0) {
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/* tree leaf, remove */
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dout("fill_dirfrag removed %llx.%llx frag %x"
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" (no ref)\n", ceph_vinop(inode), id);
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rb_erase(&frag->node, &ci->i_fragtree);
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kfree(frag);
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} else {
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/* tree branch, keep and clear */
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dout("fill_dirfrag cleared %llx.%llx frag %x"
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" referral\n", ceph_vinop(inode), id);
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frag->mds = -1;
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frag->ndist = 0;
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}
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goto out;
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}
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/* find/add this frag to store mds delegation info */
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frag = __get_or_create_frag(ci, id);
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if (IS_ERR(frag)) {
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/* this is not the end of the world; we can continue
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with bad/inaccurate delegation info */
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pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
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ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
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err = -ENOMEM;
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goto out;
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}
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frag->mds = mds;
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frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
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for (i = 0; i < frag->ndist; i++)
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frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
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dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
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ceph_vinop(inode), frag->frag, frag->ndist);
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out:
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mutex_unlock(&ci->i_fragtree_mutex);
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return err;
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}
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static int frag_tree_split_cmp(const void *l, const void *r)
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{
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struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
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struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
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return ceph_frag_compare(le32_to_cpu(ls->frag),
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le32_to_cpu(rs->frag));
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}
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static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
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{
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if (!frag)
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return f == ceph_frag_make(0, 0);
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if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
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return false;
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return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
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}
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static int ceph_fill_fragtree(struct inode *inode,
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struct ceph_frag_tree_head *fragtree,
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struct ceph_mds_reply_dirfrag *dirinfo)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct ceph_inode_frag *frag, *prev_frag = NULL;
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struct rb_node *rb_node;
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unsigned i, split_by, nsplits;
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u32 id;
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bool update = false;
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mutex_lock(&ci->i_fragtree_mutex);
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nsplits = le32_to_cpu(fragtree->nsplits);
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if (nsplits != ci->i_fragtree_nsplits) {
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update = true;
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} else if (nsplits) {
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i = prandom_u32() % nsplits;
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id = le32_to_cpu(fragtree->splits[i].frag);
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if (!__ceph_find_frag(ci, id))
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update = true;
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} else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
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rb_node = rb_first(&ci->i_fragtree);
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frag = rb_entry(rb_node, struct ceph_inode_frag, node);
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if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
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update = true;
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}
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if (!update && dirinfo) {
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id = le32_to_cpu(dirinfo->frag);
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if (id != __ceph_choose_frag(ci, id, NULL, NULL))
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update = true;
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}
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if (!update)
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goto out_unlock;
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if (nsplits > 1) {
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sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
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frag_tree_split_cmp, NULL);
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}
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dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode));
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rb_node = rb_first(&ci->i_fragtree);
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for (i = 0; i < nsplits; i++) {
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id = le32_to_cpu(fragtree->splits[i].frag);
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split_by = le32_to_cpu(fragtree->splits[i].by);
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if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
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pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
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"frag %x split by %d\n", ceph_vinop(inode),
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i, nsplits, id, split_by);
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continue;
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}
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frag = NULL;
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while (rb_node) {
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frag = rb_entry(rb_node, struct ceph_inode_frag, node);
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if (ceph_frag_compare(frag->frag, id) >= 0) {
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if (frag->frag != id)
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frag = NULL;
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else
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rb_node = rb_next(rb_node);
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break;
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}
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rb_node = rb_next(rb_node);
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/* delete stale split/leaf node */
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if (frag->split_by > 0 ||
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!is_frag_child(frag->frag, prev_frag)) {
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rb_erase(&frag->node, &ci->i_fragtree);
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if (frag->split_by > 0)
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ci->i_fragtree_nsplits--;
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kfree(frag);
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}
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frag = NULL;
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}
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if (!frag) {
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frag = __get_or_create_frag(ci, id);
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if (IS_ERR(frag))
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continue;
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}
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if (frag->split_by == 0)
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ci->i_fragtree_nsplits++;
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frag->split_by = split_by;
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dout(" frag %x split by %d\n", frag->frag, frag->split_by);
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prev_frag = frag;
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}
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while (rb_node) {
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frag = rb_entry(rb_node, struct ceph_inode_frag, node);
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rb_node = rb_next(rb_node);
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/* delete stale split/leaf node */
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if (frag->split_by > 0 ||
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!is_frag_child(frag->frag, prev_frag)) {
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rb_erase(&frag->node, &ci->i_fragtree);
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if (frag->split_by > 0)
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ci->i_fragtree_nsplits--;
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kfree(frag);
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}
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}
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out_unlock:
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mutex_unlock(&ci->i_fragtree_mutex);
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return 0;
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}
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/*
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* initialize a newly allocated inode.
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*/
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struct inode *ceph_alloc_inode(struct super_block *sb)
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{
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struct ceph_inode_info *ci;
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int i;
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ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
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if (!ci)
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return NULL;
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dout("alloc_inode %p\n", &ci->vfs_inode);
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spin_lock_init(&ci->i_ceph_lock);
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ci->i_version = 0;
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ci->i_inline_version = 0;
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ci->i_time_warp_seq = 0;
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ci->i_ceph_flags = 0;
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atomic64_set(&ci->i_ordered_count, 1);
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atomic64_set(&ci->i_release_count, 1);
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atomic64_set(&ci->i_complete_seq[0], 0);
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atomic64_set(&ci->i_complete_seq[1], 0);
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ci->i_symlink = NULL;
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memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
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RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
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ci->i_fragtree = RB_ROOT;
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mutex_init(&ci->i_fragtree_mutex);
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ci->i_xattrs.blob = NULL;
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ci->i_xattrs.prealloc_blob = NULL;
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ci->i_xattrs.dirty = false;
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ci->i_xattrs.index = RB_ROOT;
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ci->i_xattrs.count = 0;
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ci->i_xattrs.names_size = 0;
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ci->i_xattrs.vals_size = 0;
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ci->i_xattrs.version = 0;
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ci->i_xattrs.index_version = 0;
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ci->i_caps = RB_ROOT;
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ci->i_auth_cap = NULL;
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ci->i_dirty_caps = 0;
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ci->i_flushing_caps = 0;
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INIT_LIST_HEAD(&ci->i_dirty_item);
|
|
INIT_LIST_HEAD(&ci->i_flushing_item);
|
|
ci->i_prealloc_cap_flush = NULL;
|
|
INIT_LIST_HEAD(&ci->i_cap_flush_list);
|
|
init_waitqueue_head(&ci->i_cap_wq);
|
|
ci->i_hold_caps_min = 0;
|
|
ci->i_hold_caps_max = 0;
|
|
INIT_LIST_HEAD(&ci->i_cap_delay_list);
|
|
INIT_LIST_HEAD(&ci->i_cap_snaps);
|
|
ci->i_head_snapc = NULL;
|
|
ci->i_snap_caps = 0;
|
|
|
|
for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
|
|
ci->i_nr_by_mode[i] = 0;
|
|
|
|
mutex_init(&ci->i_truncate_mutex);
|
|
ci->i_truncate_seq = 0;
|
|
ci->i_truncate_size = 0;
|
|
ci->i_truncate_pending = 0;
|
|
|
|
ci->i_max_size = 0;
|
|
ci->i_reported_size = 0;
|
|
ci->i_wanted_max_size = 0;
|
|
ci->i_requested_max_size = 0;
|
|
|
|
ci->i_pin_ref = 0;
|
|
ci->i_rd_ref = 0;
|
|
ci->i_rdcache_ref = 0;
|
|
ci->i_wr_ref = 0;
|
|
ci->i_wb_ref = 0;
|
|
ci->i_wrbuffer_ref = 0;
|
|
ci->i_wrbuffer_ref_head = 0;
|
|
atomic_set(&ci->i_filelock_ref, 0);
|
|
atomic_set(&ci->i_shared_gen, 0);
|
|
ci->i_rdcache_gen = 0;
|
|
ci->i_rdcache_revoking = 0;
|
|
|
|
INIT_LIST_HEAD(&ci->i_unsafe_dirops);
|
|
INIT_LIST_HEAD(&ci->i_unsafe_iops);
|
|
spin_lock_init(&ci->i_unsafe_lock);
|
|
|
|
ci->i_snap_realm = NULL;
|
|
INIT_LIST_HEAD(&ci->i_snap_realm_item);
|
|
INIT_LIST_HEAD(&ci->i_snap_flush_item);
|
|
|
|
INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
|
|
INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
|
|
|
|
INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
|
|
|
|
ceph_fscache_inode_init(ci);
|
|
|
|
return &ci->vfs_inode;
|
|
}
|
|
|
|
static void ceph_i_callback(struct rcu_head *head)
|
|
{
|
|
struct inode *inode = container_of(head, struct inode, i_rcu);
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
|
|
kmem_cache_free(ceph_inode_cachep, ci);
|
|
}
|
|
|
|
void ceph_destroy_inode(struct inode *inode)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
struct ceph_inode_frag *frag;
|
|
struct rb_node *n;
|
|
|
|
dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
|
|
|
|
ceph_fscache_unregister_inode_cookie(ci);
|
|
|
|
ceph_queue_caps_release(inode);
|
|
|
|
/*
|
|
* we may still have a snap_realm reference if there are stray
|
|
* caps in i_snap_caps.
|
|
*/
|
|
if (ci->i_snap_realm) {
|
|
struct ceph_mds_client *mdsc =
|
|
ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
|
|
struct ceph_snap_realm *realm = ci->i_snap_realm;
|
|
|
|
dout(" dropping residual ref to snap realm %p\n", realm);
|
|
spin_lock(&realm->inodes_with_caps_lock);
|
|
list_del_init(&ci->i_snap_realm_item);
|
|
spin_unlock(&realm->inodes_with_caps_lock);
|
|
ceph_put_snap_realm(mdsc, realm);
|
|
}
|
|
|
|
kfree(ci->i_symlink);
|
|
while ((n = rb_first(&ci->i_fragtree)) != NULL) {
|
|
frag = rb_entry(n, struct ceph_inode_frag, node);
|
|
rb_erase(n, &ci->i_fragtree);
|
|
kfree(frag);
|
|
}
|
|
ci->i_fragtree_nsplits = 0;
|
|
|
|
__ceph_destroy_xattrs(ci);
|
|
if (ci->i_xattrs.blob)
|
|
ceph_buffer_put(ci->i_xattrs.blob);
|
|
if (ci->i_xattrs.prealloc_blob)
|
|
ceph_buffer_put(ci->i_xattrs.prealloc_blob);
|
|
|
|
ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
|
|
|
|
call_rcu(&inode->i_rcu, ceph_i_callback);
|
|
}
|
|
|
|
int ceph_drop_inode(struct inode *inode)
|
|
{
|
|
/*
|
|
* Positve dentry and corresponding inode are always accompanied
|
|
* in MDS reply. So no need to keep inode in the cache after
|
|
* dropping all its aliases.
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
static inline blkcnt_t calc_inode_blocks(u64 size)
|
|
{
|
|
return (size + (1<<9) - 1) >> 9;
|
|
}
|
|
|
|
/*
|
|
* Helpers to fill in size, ctime, mtime, and atime. We have to be
|
|
* careful because either the client or MDS may have more up to date
|
|
* info, depending on which capabilities are held, and whether
|
|
* time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
|
|
* and size are monotonically increasing, except when utimes() or
|
|
* truncate() increments the corresponding _seq values.)
|
|
*/
|
|
int ceph_fill_file_size(struct inode *inode, int issued,
|
|
u32 truncate_seq, u64 truncate_size, u64 size)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int queue_trunc = 0;
|
|
|
|
if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
|
|
(truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
|
|
dout("size %lld -> %llu\n", inode->i_size, size);
|
|
if (size > 0 && S_ISDIR(inode->i_mode)) {
|
|
pr_err("fill_file_size non-zero size for directory\n");
|
|
size = 0;
|
|
}
|
|
i_size_write(inode, size);
|
|
inode->i_blocks = calc_inode_blocks(size);
|
|
ci->i_reported_size = size;
|
|
if (truncate_seq != ci->i_truncate_seq) {
|
|
dout("truncate_seq %u -> %u\n",
|
|
ci->i_truncate_seq, truncate_seq);
|
|
ci->i_truncate_seq = truncate_seq;
|
|
|
|
/* the MDS should have revoked these caps */
|
|
WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
|
|
CEPH_CAP_FILE_RD |
|
|
CEPH_CAP_FILE_WR |
|
|
CEPH_CAP_FILE_LAZYIO));
|
|
/*
|
|
* If we hold relevant caps, or in the case where we're
|
|
* not the only client referencing this file and we
|
|
* don't hold those caps, then we need to check whether
|
|
* the file is either opened or mmaped
|
|
*/
|
|
if ((issued & (CEPH_CAP_FILE_CACHE|
|
|
CEPH_CAP_FILE_BUFFER)) ||
|
|
mapping_mapped(inode->i_mapping) ||
|
|
__ceph_caps_file_wanted(ci)) {
|
|
ci->i_truncate_pending++;
|
|
queue_trunc = 1;
|
|
}
|
|
}
|
|
}
|
|
if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
|
|
ci->i_truncate_size != truncate_size) {
|
|
dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
|
|
truncate_size);
|
|
ci->i_truncate_size = truncate_size;
|
|
}
|
|
|
|
if (queue_trunc)
|
|
ceph_fscache_invalidate(inode);
|
|
|
|
return queue_trunc;
|
|
}
|
|
|
|
void ceph_fill_file_time(struct inode *inode, int issued,
|
|
u64 time_warp_seq, struct timespec *ctime,
|
|
struct timespec *mtime, struct timespec *atime)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int warn = 0;
|
|
|
|
if (issued & (CEPH_CAP_FILE_EXCL|
|
|
CEPH_CAP_FILE_WR|
|
|
CEPH_CAP_FILE_BUFFER|
|
|
CEPH_CAP_AUTH_EXCL|
|
|
CEPH_CAP_XATTR_EXCL)) {
|
|
if (timespec_compare(ctime, &inode->i_ctime) > 0) {
|
|
dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
|
|
inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
|
|
ctime->tv_sec, ctime->tv_nsec);
|
|
inode->i_ctime = *ctime;
|
|
}
|
|
if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
|
|
/* the MDS did a utimes() */
|
|
dout("mtime %ld.%09ld -> %ld.%09ld "
|
|
"tw %d -> %d\n",
|
|
inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
|
|
mtime->tv_sec, mtime->tv_nsec,
|
|
ci->i_time_warp_seq, (int)time_warp_seq);
|
|
|
|
inode->i_mtime = *mtime;
|
|
inode->i_atime = *atime;
|
|
ci->i_time_warp_seq = time_warp_seq;
|
|
} else if (time_warp_seq == ci->i_time_warp_seq) {
|
|
/* nobody did utimes(); take the max */
|
|
if (timespec_compare(mtime, &inode->i_mtime) > 0) {
|
|
dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
|
|
inode->i_mtime.tv_sec,
|
|
inode->i_mtime.tv_nsec,
|
|
mtime->tv_sec, mtime->tv_nsec);
|
|
inode->i_mtime = *mtime;
|
|
}
|
|
if (timespec_compare(atime, &inode->i_atime) > 0) {
|
|
dout("atime %ld.%09ld -> %ld.%09ld inc\n",
|
|
inode->i_atime.tv_sec,
|
|
inode->i_atime.tv_nsec,
|
|
atime->tv_sec, atime->tv_nsec);
|
|
inode->i_atime = *atime;
|
|
}
|
|
} else if (issued & CEPH_CAP_FILE_EXCL) {
|
|
/* we did a utimes(); ignore mds values */
|
|
} else {
|
|
warn = 1;
|
|
}
|
|
} else {
|
|
/* we have no write|excl caps; whatever the MDS says is true */
|
|
if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
|
|
inode->i_ctime = *ctime;
|
|
inode->i_mtime = *mtime;
|
|
inode->i_atime = *atime;
|
|
ci->i_time_warp_seq = time_warp_seq;
|
|
} else {
|
|
warn = 1;
|
|
}
|
|
}
|
|
if (warn) /* time_warp_seq shouldn't go backwards */
|
|
dout("%p mds time_warp_seq %llu < %u\n",
|
|
inode, time_warp_seq, ci->i_time_warp_seq);
|
|
}
|
|
|
|
/*
|
|
* Populate an inode based on info from mds. May be called on new or
|
|
* existing inodes.
|
|
*/
|
|
static int fill_inode(struct inode *inode, struct page *locked_page,
|
|
struct ceph_mds_reply_info_in *iinfo,
|
|
struct ceph_mds_reply_dirfrag *dirinfo,
|
|
struct ceph_mds_session *session,
|
|
unsigned long ttl_from, int cap_fmode,
|
|
struct ceph_cap_reservation *caps_reservation)
|
|
{
|
|
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
|
|
struct ceph_mds_reply_inode *info = iinfo->in;
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int issued = 0, implemented, new_issued;
|
|
struct timespec mtime, atime, ctime;
|
|
struct ceph_buffer *xattr_blob = NULL;
|
|
struct ceph_string *pool_ns = NULL;
|
|
struct ceph_cap *new_cap = NULL;
|
|
int err = 0;
|
|
bool wake = false;
|
|
bool queue_trunc = false;
|
|
bool new_version = false;
|
|
bool fill_inline = false;
|
|
|
|
dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
|
|
inode, ceph_vinop(inode), le64_to_cpu(info->version),
|
|
ci->i_version);
|
|
|
|
/* prealloc new cap struct */
|
|
if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP)
|
|
new_cap = ceph_get_cap(mdsc, caps_reservation);
|
|
|
|
/*
|
|
* prealloc xattr data, if it looks like we'll need it. only
|
|
* if len > 4 (meaning there are actually xattrs; the first 4
|
|
* bytes are the xattr count).
|
|
*/
|
|
if (iinfo->xattr_len > 4) {
|
|
xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
|
|
if (!xattr_blob)
|
|
pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
|
|
iinfo->xattr_len);
|
|
}
|
|
|
|
if (iinfo->pool_ns_len > 0)
|
|
pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
|
|
iinfo->pool_ns_len);
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
|
|
/*
|
|
* provided version will be odd if inode value is projected,
|
|
* even if stable. skip the update if we have newer stable
|
|
* info (ours>=theirs, e.g. due to racing mds replies), unless
|
|
* we are getting projected (unstable) info (in which case the
|
|
* version is odd, and we want ours>theirs).
|
|
* us them
|
|
* 2 2 skip
|
|
* 3 2 skip
|
|
* 3 3 update
|
|
*/
|
|
if (ci->i_version == 0 ||
|
|
((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
|
|
le64_to_cpu(info->version) > (ci->i_version & ~1)))
|
|
new_version = true;
|
|
|
|
issued = __ceph_caps_issued(ci, &implemented);
|
|
issued |= implemented | __ceph_caps_dirty(ci);
|
|
new_issued = ~issued & le32_to_cpu(info->cap.caps);
|
|
|
|
/* update inode */
|
|
ci->i_version = le64_to_cpu(info->version);
|
|
inode->i_rdev = le32_to_cpu(info->rdev);
|
|
inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
|
|
|
|
if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
|
|
(issued & CEPH_CAP_AUTH_EXCL) == 0) {
|
|
inode->i_mode = le32_to_cpu(info->mode);
|
|
inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
|
|
inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
|
|
dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
|
|
from_kuid(&init_user_ns, inode->i_uid),
|
|
from_kgid(&init_user_ns, inode->i_gid));
|
|
}
|
|
|
|
if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
|
|
(issued & CEPH_CAP_LINK_EXCL) == 0)
|
|
set_nlink(inode, le32_to_cpu(info->nlink));
|
|
|
|
if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
|
|
/* be careful with mtime, atime, size */
|
|
ceph_decode_timespec(&atime, &info->atime);
|
|
ceph_decode_timespec(&mtime, &info->mtime);
|
|
ceph_decode_timespec(&ctime, &info->ctime);
|
|
ceph_fill_file_time(inode, issued,
|
|
le32_to_cpu(info->time_warp_seq),
|
|
&ctime, &mtime, &atime);
|
|
}
|
|
|
|
if (new_version ||
|
|
(new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
|
|
s64 old_pool = ci->i_layout.pool_id;
|
|
struct ceph_string *old_ns;
|
|
|
|
ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
|
|
old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
|
|
lockdep_is_held(&ci->i_ceph_lock));
|
|
rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
|
|
|
|
if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
|
|
ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
|
|
|
|
pool_ns = old_ns;
|
|
|
|
queue_trunc = ceph_fill_file_size(inode, issued,
|
|
le32_to_cpu(info->truncate_seq),
|
|
le64_to_cpu(info->truncate_size),
|
|
le64_to_cpu(info->size));
|
|
/* only update max_size on auth cap */
|
|
if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
|
|
ci->i_max_size != le64_to_cpu(info->max_size)) {
|
|
dout("max_size %lld -> %llu\n", ci->i_max_size,
|
|
le64_to_cpu(info->max_size));
|
|
ci->i_max_size = le64_to_cpu(info->max_size);
|
|
}
|
|
}
|
|
|
|
/* xattrs */
|
|
/* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
|
|
if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
|
|
le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
|
|
if (ci->i_xattrs.blob)
|
|
ceph_buffer_put(ci->i_xattrs.blob);
|
|
ci->i_xattrs.blob = xattr_blob;
|
|
if (xattr_blob)
|
|
memcpy(ci->i_xattrs.blob->vec.iov_base,
|
|
iinfo->xattr_data, iinfo->xattr_len);
|
|
ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
|
|
ceph_forget_all_cached_acls(inode);
|
|
xattr_blob = NULL;
|
|
}
|
|
|
|
inode->i_mapping->a_ops = &ceph_aops;
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFIFO:
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
case S_IFSOCK:
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
|
inode->i_op = &ceph_file_iops;
|
|
break;
|
|
case S_IFREG:
|
|
inode->i_op = &ceph_file_iops;
|
|
inode->i_fop = &ceph_file_fops;
|
|
break;
|
|
case S_IFLNK:
|
|
inode->i_op = &ceph_symlink_iops;
|
|
if (!ci->i_symlink) {
|
|
u32 symlen = iinfo->symlink_len;
|
|
char *sym;
|
|
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
|
|
if (symlen != i_size_read(inode)) {
|
|
pr_err("fill_inode %llx.%llx BAD symlink "
|
|
"size %lld\n", ceph_vinop(inode),
|
|
i_size_read(inode));
|
|
i_size_write(inode, symlen);
|
|
inode->i_blocks = calc_inode_blocks(symlen);
|
|
}
|
|
|
|
err = -ENOMEM;
|
|
sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
|
|
if (!sym)
|
|
goto out;
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
if (!ci->i_symlink)
|
|
ci->i_symlink = sym;
|
|
else
|
|
kfree(sym); /* lost a race */
|
|
}
|
|
inode->i_link = ci->i_symlink;
|
|
break;
|
|
case S_IFDIR:
|
|
inode->i_op = &ceph_dir_iops;
|
|
inode->i_fop = &ceph_dir_fops;
|
|
|
|
ci->i_dir_layout = iinfo->dir_layout;
|
|
|
|
ci->i_files = le64_to_cpu(info->files);
|
|
ci->i_subdirs = le64_to_cpu(info->subdirs);
|
|
ci->i_rbytes = le64_to_cpu(info->rbytes);
|
|
ci->i_rfiles = le64_to_cpu(info->rfiles);
|
|
ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
|
|
ceph_decode_timespec(&ci->i_rctime, &info->rctime);
|
|
break;
|
|
default:
|
|
pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
|
|
ceph_vinop(inode), inode->i_mode);
|
|
}
|
|
|
|
/* were we issued a capability? */
|
|
if (info->cap.caps) {
|
|
if (ceph_snap(inode) == CEPH_NOSNAP) {
|
|
unsigned caps = le32_to_cpu(info->cap.caps);
|
|
ceph_add_cap(inode, session,
|
|
le64_to_cpu(info->cap.cap_id),
|
|
cap_fmode, caps,
|
|
le32_to_cpu(info->cap.wanted),
|
|
le32_to_cpu(info->cap.seq),
|
|
le32_to_cpu(info->cap.mseq),
|
|
le64_to_cpu(info->cap.realm),
|
|
info->cap.flags, &new_cap);
|
|
|
|
/* set dir completion flag? */
|
|
if (S_ISDIR(inode->i_mode) &&
|
|
ci->i_files == 0 && ci->i_subdirs == 0 &&
|
|
(caps & CEPH_CAP_FILE_SHARED) &&
|
|
(issued & CEPH_CAP_FILE_EXCL) == 0 &&
|
|
!__ceph_dir_is_complete(ci)) {
|
|
dout(" marking %p complete (empty)\n", inode);
|
|
i_size_write(inode, 0);
|
|
__ceph_dir_set_complete(ci,
|
|
atomic64_read(&ci->i_release_count),
|
|
atomic64_read(&ci->i_ordered_count));
|
|
}
|
|
|
|
wake = true;
|
|
} else {
|
|
dout(" %p got snap_caps %s\n", inode,
|
|
ceph_cap_string(le32_to_cpu(info->cap.caps)));
|
|
ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
|
|
if (cap_fmode >= 0)
|
|
__ceph_get_fmode(ci, cap_fmode);
|
|
}
|
|
} else if (cap_fmode >= 0) {
|
|
pr_warn("mds issued no caps on %llx.%llx\n",
|
|
ceph_vinop(inode));
|
|
__ceph_get_fmode(ci, cap_fmode);
|
|
}
|
|
|
|
if (iinfo->inline_version > 0 &&
|
|
iinfo->inline_version >= ci->i_inline_version) {
|
|
int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
|
|
ci->i_inline_version = iinfo->inline_version;
|
|
if (ci->i_inline_version != CEPH_INLINE_NONE &&
|
|
(locked_page ||
|
|
(le32_to_cpu(info->cap.caps) & cache_caps)))
|
|
fill_inline = true;
|
|
}
|
|
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
|
|
if (fill_inline)
|
|
ceph_fill_inline_data(inode, locked_page,
|
|
iinfo->inline_data, iinfo->inline_len);
|
|
|
|
if (wake)
|
|
wake_up_all(&ci->i_cap_wq);
|
|
|
|
/* queue truncate if we saw i_size decrease */
|
|
if (queue_trunc)
|
|
ceph_queue_vmtruncate(inode);
|
|
|
|
/* populate frag tree */
|
|
if (S_ISDIR(inode->i_mode))
|
|
ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
|
|
|
|
/* update delegation info? */
|
|
if (dirinfo)
|
|
ceph_fill_dirfrag(inode, dirinfo);
|
|
|
|
err = 0;
|
|
out:
|
|
if (new_cap)
|
|
ceph_put_cap(mdsc, new_cap);
|
|
if (xattr_blob)
|
|
ceph_buffer_put(xattr_blob);
|
|
ceph_put_string(pool_ns);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* caller should hold session s_mutex.
|
|
*/
|
|
static void update_dentry_lease(struct dentry *dentry,
|
|
struct ceph_mds_reply_lease *lease,
|
|
struct ceph_mds_session *session,
|
|
unsigned long from_time,
|
|
struct ceph_vino *tgt_vino,
|
|
struct ceph_vino *dir_vino)
|
|
{
|
|
struct ceph_dentry_info *di = ceph_dentry(dentry);
|
|
long unsigned duration = le32_to_cpu(lease->duration_ms);
|
|
long unsigned ttl = from_time + (duration * HZ) / 1000;
|
|
long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
|
|
struct inode *dir;
|
|
struct ceph_mds_session *old_lease_session = NULL;
|
|
|
|
/*
|
|
* Make sure dentry's inode matches tgt_vino. NULL tgt_vino means that
|
|
* we expect a negative dentry.
|
|
*/
|
|
if (!tgt_vino && d_really_is_positive(dentry))
|
|
return;
|
|
|
|
if (tgt_vino && (d_really_is_negative(dentry) ||
|
|
!ceph_ino_compare(d_inode(dentry), tgt_vino)))
|
|
return;
|
|
|
|
spin_lock(&dentry->d_lock);
|
|
dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
|
|
dentry, duration, ttl);
|
|
|
|
dir = d_inode(dentry->d_parent);
|
|
|
|
/* make sure parent matches dir_vino */
|
|
if (!ceph_ino_compare(dir, dir_vino))
|
|
goto out_unlock;
|
|
|
|
/* only track leases on regular dentries */
|
|
if (ceph_snap(dir) != CEPH_NOSNAP)
|
|
goto out_unlock;
|
|
|
|
di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen);
|
|
|
|
if (duration == 0)
|
|
goto out_unlock;
|
|
|
|
if (di->lease_gen == session->s_cap_gen &&
|
|
time_before(ttl, di->time))
|
|
goto out_unlock; /* we already have a newer lease. */
|
|
|
|
if (di->lease_session && di->lease_session != session) {
|
|
old_lease_session = di->lease_session;
|
|
di->lease_session = NULL;
|
|
}
|
|
|
|
ceph_dentry_lru_touch(dentry);
|
|
|
|
if (!di->lease_session)
|
|
di->lease_session = ceph_get_mds_session(session);
|
|
di->lease_gen = session->s_cap_gen;
|
|
di->lease_seq = le32_to_cpu(lease->seq);
|
|
di->lease_renew_after = half_ttl;
|
|
di->lease_renew_from = 0;
|
|
di->time = ttl;
|
|
out_unlock:
|
|
spin_unlock(&dentry->d_lock);
|
|
if (old_lease_session)
|
|
ceph_put_mds_session(old_lease_session);
|
|
}
|
|
|
|
/*
|
|
* splice a dentry to an inode.
|
|
* caller must hold directory i_mutex for this to be safe.
|
|
*/
|
|
static struct dentry *splice_dentry(struct dentry *dn, struct inode *in)
|
|
{
|
|
struct dentry *realdn;
|
|
|
|
BUG_ON(d_inode(dn));
|
|
|
|
if (S_ISDIR(in->i_mode)) {
|
|
/* If inode is directory, d_splice_alias() below will remove
|
|
* 'realdn' from its origin parent. We need to ensure that
|
|
* origin parent's readdir cache will not reference 'realdn'
|
|
*/
|
|
realdn = d_find_any_alias(in);
|
|
if (realdn) {
|
|
struct ceph_dentry_info *di = ceph_dentry(realdn);
|
|
spin_lock(&realdn->d_lock);
|
|
|
|
realdn->d_op->d_prune(realdn);
|
|
|
|
di->time = jiffies;
|
|
di->lease_shared_gen = 0;
|
|
di->offset = 0;
|
|
|
|
spin_unlock(&realdn->d_lock);
|
|
dput(realdn);
|
|
}
|
|
}
|
|
|
|
/* dn must be unhashed */
|
|
if (!d_unhashed(dn))
|
|
d_drop(dn);
|
|
realdn = d_splice_alias(in, dn);
|
|
if (IS_ERR(realdn)) {
|
|
pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
|
|
PTR_ERR(realdn), dn, in, ceph_vinop(in));
|
|
dn = realdn; /* note realdn contains the error */
|
|
goto out;
|
|
} else if (realdn) {
|
|
dout("dn %p (%d) spliced with %p (%d) "
|
|
"inode %p ino %llx.%llx\n",
|
|
dn, d_count(dn),
|
|
realdn, d_count(realdn),
|
|
d_inode(realdn), ceph_vinop(d_inode(realdn)));
|
|
dput(dn);
|
|
dn = realdn;
|
|
} else {
|
|
BUG_ON(!ceph_dentry(dn));
|
|
dout("dn %p attached to %p ino %llx.%llx\n",
|
|
dn, d_inode(dn), ceph_vinop(d_inode(dn)));
|
|
}
|
|
out:
|
|
return dn;
|
|
}
|
|
|
|
/*
|
|
* Incorporate results into the local cache. This is either just
|
|
* one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
|
|
* after a lookup).
|
|
*
|
|
* A reply may contain
|
|
* a directory inode along with a dentry.
|
|
* and/or a target inode
|
|
*
|
|
* Called with snap_rwsem (read).
|
|
*/
|
|
int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
|
|
{
|
|
struct ceph_mds_session *session = req->r_session;
|
|
struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
|
|
struct inode *in = NULL;
|
|
struct ceph_vino tvino, dvino;
|
|
struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
|
|
int err = 0;
|
|
|
|
dout("fill_trace %p is_dentry %d is_target %d\n", req,
|
|
rinfo->head->is_dentry, rinfo->head->is_target);
|
|
|
|
if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
|
|
dout("fill_trace reply is empty!\n");
|
|
if (rinfo->head->result == 0 && req->r_parent)
|
|
ceph_invalidate_dir_request(req);
|
|
return 0;
|
|
}
|
|
|
|
if (rinfo->head->is_dentry) {
|
|
struct inode *dir = req->r_parent;
|
|
|
|
if (dir) {
|
|
err = fill_inode(dir, NULL,
|
|
&rinfo->diri, rinfo->dirfrag,
|
|
session, req->r_request_started, -1,
|
|
&req->r_caps_reservation);
|
|
if (err < 0)
|
|
goto done;
|
|
} else {
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
|
|
struct qstr dname;
|
|
struct dentry *dn, *parent;
|
|
|
|
BUG_ON(!rinfo->head->is_target);
|
|
BUG_ON(req->r_dentry);
|
|
|
|
parent = d_find_any_alias(dir);
|
|
BUG_ON(!parent);
|
|
|
|
dname.name = rinfo->dname;
|
|
dname.len = rinfo->dname_len;
|
|
dname.hash = full_name_hash(parent, dname.name, dname.len);
|
|
tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
retry_lookup:
|
|
dn = d_lookup(parent, &dname);
|
|
dout("d_lookup on parent=%p name=%.*s got %p\n",
|
|
parent, dname.len, dname.name, dn);
|
|
|
|
if (!dn) {
|
|
dn = d_alloc(parent, &dname);
|
|
dout("d_alloc %p '%.*s' = %p\n", parent,
|
|
dname.len, dname.name, dn);
|
|
if (!dn) {
|
|
dput(parent);
|
|
err = -ENOMEM;
|
|
goto done;
|
|
}
|
|
err = 0;
|
|
} else if (d_really_is_positive(dn) &&
|
|
(ceph_ino(d_inode(dn)) != tvino.ino ||
|
|
ceph_snap(d_inode(dn)) != tvino.snap)) {
|
|
dout(" dn %p points to wrong inode %p\n",
|
|
dn, d_inode(dn));
|
|
ceph_dir_clear_ordered(dir);
|
|
d_delete(dn);
|
|
dput(dn);
|
|
goto retry_lookup;
|
|
}
|
|
|
|
req->r_dentry = dn;
|
|
dput(parent);
|
|
}
|
|
}
|
|
|
|
if (rinfo->head->is_target) {
|
|
tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
|
|
in = ceph_get_inode(sb, tvino);
|
|
if (IS_ERR(in)) {
|
|
err = PTR_ERR(in);
|
|
goto done;
|
|
}
|
|
req->r_target_inode = in;
|
|
|
|
err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL,
|
|
session, req->r_request_started,
|
|
(!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
|
|
rinfo->head->result == 0) ? req->r_fmode : -1,
|
|
&req->r_caps_reservation);
|
|
if (err < 0) {
|
|
pr_err("fill_inode badness %p %llx.%llx\n",
|
|
in, ceph_vinop(in));
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ignore null lease/binding on snapdir ENOENT, or else we
|
|
* will have trouble splicing in the virtual snapdir later
|
|
*/
|
|
if (rinfo->head->is_dentry &&
|
|
!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
|
|
test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
|
|
(rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
|
|
fsc->mount_options->snapdir_name,
|
|
req->r_dentry->d_name.len))) {
|
|
/*
|
|
* lookup link rename : null -> possibly existing inode
|
|
* mknod symlink mkdir : null -> new inode
|
|
* unlink : linked -> null
|
|
*/
|
|
struct inode *dir = req->r_parent;
|
|
struct dentry *dn = req->r_dentry;
|
|
bool have_dir_cap, have_lease;
|
|
|
|
BUG_ON(!dn);
|
|
BUG_ON(!dir);
|
|
BUG_ON(d_inode(dn->d_parent) != dir);
|
|
|
|
dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
|
|
dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
|
|
|
|
BUG_ON(ceph_ino(dir) != dvino.ino);
|
|
BUG_ON(ceph_snap(dir) != dvino.snap);
|
|
|
|
/* do we have a lease on the whole dir? */
|
|
have_dir_cap =
|
|
(le32_to_cpu(rinfo->diri.in->cap.caps) &
|
|
CEPH_CAP_FILE_SHARED);
|
|
|
|
/* do we have a dn lease? */
|
|
have_lease = have_dir_cap ||
|
|
le32_to_cpu(rinfo->dlease->duration_ms);
|
|
if (!have_lease)
|
|
dout("fill_trace no dentry lease or dir cap\n");
|
|
|
|
/* rename? */
|
|
if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
|
|
struct inode *olddir = req->r_old_dentry_dir;
|
|
BUG_ON(!olddir);
|
|
|
|
dout(" src %p '%pd' dst %p '%pd'\n",
|
|
req->r_old_dentry,
|
|
req->r_old_dentry,
|
|
dn, dn);
|
|
dout("fill_trace doing d_move %p -> %p\n",
|
|
req->r_old_dentry, dn);
|
|
|
|
/* d_move screws up sibling dentries' offsets */
|
|
ceph_dir_clear_ordered(dir);
|
|
ceph_dir_clear_ordered(olddir);
|
|
|
|
d_move(req->r_old_dentry, dn);
|
|
dout(" src %p '%pd' dst %p '%pd'\n",
|
|
req->r_old_dentry,
|
|
req->r_old_dentry,
|
|
dn, dn);
|
|
|
|
/* ensure target dentry is invalidated, despite
|
|
rehashing bug in vfs_rename_dir */
|
|
ceph_invalidate_dentry_lease(dn);
|
|
|
|
dout("dn %p gets new offset %lld\n", req->r_old_dentry,
|
|
ceph_dentry(req->r_old_dentry)->offset);
|
|
|
|
dn = req->r_old_dentry; /* use old_dentry */
|
|
}
|
|
|
|
/* null dentry? */
|
|
if (!rinfo->head->is_target) {
|
|
dout("fill_trace null dentry\n");
|
|
if (d_really_is_positive(dn)) {
|
|
dout("d_delete %p\n", dn);
|
|
ceph_dir_clear_ordered(dir);
|
|
d_delete(dn);
|
|
} else if (have_lease) {
|
|
if (d_unhashed(dn))
|
|
d_add(dn, NULL);
|
|
update_dentry_lease(dn, rinfo->dlease,
|
|
session,
|
|
req->r_request_started,
|
|
NULL, &dvino);
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
/* attach proper inode */
|
|
if (d_really_is_negative(dn)) {
|
|
ceph_dir_clear_ordered(dir);
|
|
ihold(in);
|
|
dn = splice_dentry(dn, in);
|
|
if (IS_ERR(dn)) {
|
|
err = PTR_ERR(dn);
|
|
goto done;
|
|
}
|
|
req->r_dentry = dn; /* may have spliced */
|
|
} else if (d_really_is_positive(dn) && d_inode(dn) != in) {
|
|
dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
|
|
dn, d_inode(dn), ceph_vinop(d_inode(dn)),
|
|
ceph_vinop(in));
|
|
d_invalidate(dn);
|
|
have_lease = false;
|
|
}
|
|
|
|
if (have_lease) {
|
|
tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
update_dentry_lease(dn, rinfo->dlease, session,
|
|
req->r_request_started,
|
|
&tvino, &dvino);
|
|
}
|
|
dout(" final dn %p\n", dn);
|
|
} else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
|
|
req->r_op == CEPH_MDS_OP_MKSNAP) &&
|
|
!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
|
|
struct dentry *dn = req->r_dentry;
|
|
struct inode *dir = req->r_parent;
|
|
|
|
/* fill out a snapdir LOOKUPSNAP dentry */
|
|
BUG_ON(!dn);
|
|
BUG_ON(!dir);
|
|
BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
|
|
dout(" linking snapped dir %p to dn %p\n", in, dn);
|
|
ceph_dir_clear_ordered(dir);
|
|
ihold(in);
|
|
dn = splice_dentry(dn, in);
|
|
if (IS_ERR(dn)) {
|
|
err = PTR_ERR(dn);
|
|
goto done;
|
|
}
|
|
req->r_dentry = dn; /* may have spliced */
|
|
} else if (rinfo->head->is_dentry) {
|
|
struct ceph_vino *ptvino = NULL;
|
|
|
|
if ((le32_to_cpu(rinfo->diri.in->cap.caps) & CEPH_CAP_FILE_SHARED) ||
|
|
le32_to_cpu(rinfo->dlease->duration_ms)) {
|
|
dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
|
|
dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
|
|
|
|
if (rinfo->head->is_target) {
|
|
tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
ptvino = &tvino;
|
|
}
|
|
|
|
update_dentry_lease(req->r_dentry, rinfo->dlease,
|
|
session, req->r_request_started, ptvino,
|
|
&dvino);
|
|
} else {
|
|
dout("%s: no dentry lease or dir cap\n", __func__);
|
|
}
|
|
}
|
|
done:
|
|
dout("fill_trace done err=%d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Prepopulate our cache with readdir results, leases, etc.
|
|
*/
|
|
static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
|
|
struct ceph_mds_session *session)
|
|
{
|
|
struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
|
|
int i, err = 0;
|
|
|
|
for (i = 0; i < rinfo->dir_nr; i++) {
|
|
struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
|
|
struct ceph_vino vino;
|
|
struct inode *in;
|
|
int rc;
|
|
|
|
vino.ino = le64_to_cpu(rde->inode.in->ino);
|
|
vino.snap = le64_to_cpu(rde->inode.in->snapid);
|
|
|
|
in = ceph_get_inode(req->r_dentry->d_sb, vino);
|
|
if (IS_ERR(in)) {
|
|
err = PTR_ERR(in);
|
|
dout("new_inode badness got %d\n", err);
|
|
continue;
|
|
}
|
|
rc = fill_inode(in, NULL, &rde->inode, NULL, session,
|
|
req->r_request_started, -1,
|
|
&req->r_caps_reservation);
|
|
if (rc < 0) {
|
|
pr_err("fill_inode badness on %p got %d\n", in, rc);
|
|
err = rc;
|
|
}
|
|
iput(in);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
|
|
{
|
|
if (ctl->page) {
|
|
kunmap(ctl->page);
|
|
put_page(ctl->page);
|
|
ctl->page = NULL;
|
|
}
|
|
}
|
|
|
|
static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
|
|
struct ceph_readdir_cache_control *ctl,
|
|
struct ceph_mds_request *req)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(dir);
|
|
unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
|
|
unsigned idx = ctl->index % nsize;
|
|
pgoff_t pgoff = ctl->index / nsize;
|
|
|
|
if (!ctl->page || pgoff != page_index(ctl->page)) {
|
|
ceph_readdir_cache_release(ctl);
|
|
if (idx == 0)
|
|
ctl->page = grab_cache_page(&dir->i_data, pgoff);
|
|
else
|
|
ctl->page = find_lock_page(&dir->i_data, pgoff);
|
|
if (!ctl->page) {
|
|
ctl->index = -1;
|
|
return idx == 0 ? -ENOMEM : 0;
|
|
}
|
|
/* reading/filling the cache are serialized by
|
|
* i_mutex, no need to use page lock */
|
|
unlock_page(ctl->page);
|
|
ctl->dentries = kmap(ctl->page);
|
|
if (idx == 0)
|
|
memset(ctl->dentries, 0, PAGE_SIZE);
|
|
}
|
|
|
|
if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
|
|
req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
|
|
dout("readdir cache dn %p idx %d\n", dn, ctl->index);
|
|
ctl->dentries[idx] = dn;
|
|
ctl->index++;
|
|
} else {
|
|
dout("disable readdir cache\n");
|
|
ctl->index = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ceph_readdir_prepopulate(struct ceph_mds_request *req,
|
|
struct ceph_mds_session *session)
|
|
{
|
|
struct dentry *parent = req->r_dentry;
|
|
struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
|
|
struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
|
|
struct qstr dname;
|
|
struct dentry *dn;
|
|
struct inode *in;
|
|
int err = 0, skipped = 0, ret, i;
|
|
struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
|
|
u32 frag = le32_to_cpu(rhead->args.readdir.frag);
|
|
u32 last_hash = 0;
|
|
u32 fpos_offset;
|
|
struct ceph_readdir_cache_control cache_ctl = {};
|
|
|
|
if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
|
|
return readdir_prepopulate_inodes_only(req, session);
|
|
|
|
if (rinfo->hash_order) {
|
|
if (req->r_path2) {
|
|
last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
|
|
req->r_path2,
|
|
strlen(req->r_path2));
|
|
last_hash = ceph_frag_value(last_hash);
|
|
} else if (rinfo->offset_hash) {
|
|
/* mds understands offset_hash */
|
|
WARN_ON_ONCE(req->r_readdir_offset != 2);
|
|
last_hash = le32_to_cpu(rhead->args.readdir.offset_hash);
|
|
}
|
|
}
|
|
|
|
if (rinfo->dir_dir &&
|
|
le32_to_cpu(rinfo->dir_dir->frag) != frag) {
|
|
dout("readdir_prepopulate got new frag %x -> %x\n",
|
|
frag, le32_to_cpu(rinfo->dir_dir->frag));
|
|
frag = le32_to_cpu(rinfo->dir_dir->frag);
|
|
if (!rinfo->hash_order)
|
|
req->r_readdir_offset = 2;
|
|
}
|
|
|
|
if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
|
|
dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
|
|
rinfo->dir_nr, parent);
|
|
} else {
|
|
dout("readdir_prepopulate %d items under dn %p\n",
|
|
rinfo->dir_nr, parent);
|
|
if (rinfo->dir_dir)
|
|
ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
|
|
|
|
if (ceph_frag_is_leftmost(frag) &&
|
|
req->r_readdir_offset == 2 &&
|
|
!(rinfo->hash_order && last_hash)) {
|
|
/* note dir version at start of readdir so we can
|
|
* tell if any dentries get dropped */
|
|
req->r_dir_release_cnt =
|
|
atomic64_read(&ci->i_release_count);
|
|
req->r_dir_ordered_cnt =
|
|
atomic64_read(&ci->i_ordered_count);
|
|
req->r_readdir_cache_idx = 0;
|
|
}
|
|
}
|
|
|
|
cache_ctl.index = req->r_readdir_cache_idx;
|
|
fpos_offset = req->r_readdir_offset;
|
|
|
|
/* FIXME: release caps/leases if error occurs */
|
|
for (i = 0; i < rinfo->dir_nr; i++) {
|
|
struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
|
|
struct ceph_vino tvino, dvino;
|
|
|
|
dname.name = rde->name;
|
|
dname.len = rde->name_len;
|
|
dname.hash = full_name_hash(parent, dname.name, dname.len);
|
|
|
|
tvino.ino = le64_to_cpu(rde->inode.in->ino);
|
|
tvino.snap = le64_to_cpu(rde->inode.in->snapid);
|
|
|
|
if (rinfo->hash_order) {
|
|
u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
|
|
rde->name, rde->name_len);
|
|
hash = ceph_frag_value(hash);
|
|
if (hash != last_hash)
|
|
fpos_offset = 2;
|
|
last_hash = hash;
|
|
rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
|
|
} else {
|
|
rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
|
|
}
|
|
|
|
retry_lookup:
|
|
dn = d_lookup(parent, &dname);
|
|
dout("d_lookup on parent=%p name=%.*s got %p\n",
|
|
parent, dname.len, dname.name, dn);
|
|
|
|
if (!dn) {
|
|
dn = d_alloc(parent, &dname);
|
|
dout("d_alloc %p '%.*s' = %p\n", parent,
|
|
dname.len, dname.name, dn);
|
|
if (!dn) {
|
|
dout("d_alloc badness\n");
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
} else if (d_really_is_positive(dn) &&
|
|
(ceph_ino(d_inode(dn)) != tvino.ino ||
|
|
ceph_snap(d_inode(dn)) != tvino.snap)) {
|
|
struct ceph_dentry_info *di = ceph_dentry(dn);
|
|
dout(" dn %p points to wrong inode %p\n",
|
|
dn, d_inode(dn));
|
|
|
|
spin_lock(&dn->d_lock);
|
|
if (di->offset > 0 &&
|
|
di->lease_shared_gen ==
|
|
atomic_read(&ci->i_shared_gen)) {
|
|
__ceph_dir_clear_ordered(ci);
|
|
di->offset = 0;
|
|
}
|
|
spin_unlock(&dn->d_lock);
|
|
|
|
d_delete(dn);
|
|
dput(dn);
|
|
goto retry_lookup;
|
|
}
|
|
|
|
/* inode */
|
|
if (d_really_is_positive(dn)) {
|
|
in = d_inode(dn);
|
|
} else {
|
|
in = ceph_get_inode(parent->d_sb, tvino);
|
|
if (IS_ERR(in)) {
|
|
dout("new_inode badness\n");
|
|
d_drop(dn);
|
|
dput(dn);
|
|
err = PTR_ERR(in);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = fill_inode(in, NULL, &rde->inode, NULL, session,
|
|
req->r_request_started, -1,
|
|
&req->r_caps_reservation);
|
|
if (ret < 0) {
|
|
pr_err("fill_inode badness on %p\n", in);
|
|
if (d_really_is_negative(dn))
|
|
iput(in);
|
|
d_drop(dn);
|
|
err = ret;
|
|
goto next_item;
|
|
}
|
|
|
|
if (d_really_is_negative(dn)) {
|
|
struct dentry *realdn;
|
|
|
|
if (ceph_security_xattr_deadlock(in)) {
|
|
dout(" skip splicing dn %p to inode %p"
|
|
" (security xattr deadlock)\n", dn, in);
|
|
iput(in);
|
|
skipped++;
|
|
goto next_item;
|
|
}
|
|
|
|
realdn = splice_dentry(dn, in);
|
|
if (IS_ERR(realdn)) {
|
|
err = PTR_ERR(realdn);
|
|
d_drop(dn);
|
|
dn = NULL;
|
|
goto next_item;
|
|
}
|
|
dn = realdn;
|
|
}
|
|
|
|
ceph_dentry(dn)->offset = rde->offset;
|
|
|
|
dvino = ceph_vino(d_inode(parent));
|
|
update_dentry_lease(dn, rde->lease, req->r_session,
|
|
req->r_request_started, &tvino, &dvino);
|
|
|
|
if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
|
|
ret = fill_readdir_cache(d_inode(parent), dn,
|
|
&cache_ctl, req);
|
|
if (ret < 0)
|
|
err = ret;
|
|
}
|
|
next_item:
|
|
if (dn)
|
|
dput(dn);
|
|
}
|
|
out:
|
|
if (err == 0 && skipped == 0) {
|
|
set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
|
|
req->r_readdir_cache_idx = cache_ctl.index;
|
|
}
|
|
ceph_readdir_cache_release(&cache_ctl);
|
|
dout("readdir_prepopulate done\n");
|
|
return err;
|
|
}
|
|
|
|
bool ceph_inode_set_size(struct inode *inode, loff_t size)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
bool ret;
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
|
|
i_size_write(inode, size);
|
|
inode->i_blocks = calc_inode_blocks(size);
|
|
|
|
ret = __ceph_should_report_size(ci);
|
|
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Write back inode data in a worker thread. (This can't be done
|
|
* in the message handler context.)
|
|
*/
|
|
void ceph_queue_writeback(struct inode *inode)
|
|
{
|
|
ihold(inode);
|
|
if (queue_work(ceph_inode_to_client(inode)->wb_wq,
|
|
&ceph_inode(inode)->i_wb_work)) {
|
|
dout("ceph_queue_writeback %p\n", inode);
|
|
} else {
|
|
dout("ceph_queue_writeback %p failed\n", inode);
|
|
iput(inode);
|
|
}
|
|
}
|
|
|
|
static void ceph_writeback_work(struct work_struct *work)
|
|
{
|
|
struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
|
|
i_wb_work);
|
|
struct inode *inode = &ci->vfs_inode;
|
|
|
|
dout("writeback %p\n", inode);
|
|
filemap_fdatawrite(&inode->i_data);
|
|
iput(inode);
|
|
}
|
|
|
|
/*
|
|
* queue an async invalidation
|
|
*/
|
|
void ceph_queue_invalidate(struct inode *inode)
|
|
{
|
|
ihold(inode);
|
|
if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
|
|
&ceph_inode(inode)->i_pg_inv_work)) {
|
|
dout("ceph_queue_invalidate %p\n", inode);
|
|
} else {
|
|
dout("ceph_queue_invalidate %p failed\n", inode);
|
|
iput(inode);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Invalidate inode pages in a worker thread. (This can't be done
|
|
* in the message handler context.)
|
|
*/
|
|
static void ceph_invalidate_work(struct work_struct *work)
|
|
{
|
|
struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
|
|
i_pg_inv_work);
|
|
struct inode *inode = &ci->vfs_inode;
|
|
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
|
|
u32 orig_gen;
|
|
int check = 0;
|
|
|
|
mutex_lock(&ci->i_truncate_mutex);
|
|
|
|
if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
|
|
pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
|
|
inode, ceph_ino(inode));
|
|
mapping_set_error(inode->i_mapping, -EIO);
|
|
truncate_pagecache(inode, 0);
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
dout("invalidate_pages %p gen %d revoking %d\n", inode,
|
|
ci->i_rdcache_gen, ci->i_rdcache_revoking);
|
|
if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
|
|
if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
|
|
check = 1;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
goto out;
|
|
}
|
|
orig_gen = ci->i_rdcache_gen;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
|
|
if (invalidate_inode_pages2(inode->i_mapping) < 0) {
|
|
pr_err("invalidate_pages %p fails\n", inode);
|
|
}
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
if (orig_gen == ci->i_rdcache_gen &&
|
|
orig_gen == ci->i_rdcache_revoking) {
|
|
dout("invalidate_pages %p gen %d successful\n", inode,
|
|
ci->i_rdcache_gen);
|
|
ci->i_rdcache_revoking--;
|
|
check = 1;
|
|
} else {
|
|
dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
|
|
inode, orig_gen, ci->i_rdcache_gen,
|
|
ci->i_rdcache_revoking);
|
|
if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
|
|
check = 1;
|
|
}
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
out:
|
|
if (check)
|
|
ceph_check_caps(ci, 0, NULL);
|
|
iput(inode);
|
|
}
|
|
|
|
|
|
/*
|
|
* called by trunc_wq;
|
|
*
|
|
* We also truncate in a separate thread as well.
|
|
*/
|
|
static void ceph_vmtruncate_work(struct work_struct *work)
|
|
{
|
|
struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
|
|
i_vmtruncate_work);
|
|
struct inode *inode = &ci->vfs_inode;
|
|
|
|
dout("vmtruncate_work %p\n", inode);
|
|
__ceph_do_pending_vmtruncate(inode);
|
|
iput(inode);
|
|
}
|
|
|
|
/*
|
|
* Queue an async vmtruncate. If we fail to queue work, we will handle
|
|
* the truncation the next time we call __ceph_do_pending_vmtruncate.
|
|
*/
|
|
void ceph_queue_vmtruncate(struct inode *inode)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
|
|
ihold(inode);
|
|
|
|
if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
|
|
&ci->i_vmtruncate_work)) {
|
|
dout("ceph_queue_vmtruncate %p\n", inode);
|
|
} else {
|
|
dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
|
|
inode, ci->i_truncate_pending);
|
|
iput(inode);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make sure any pending truncation is applied before doing anything
|
|
* that may depend on it.
|
|
*/
|
|
void __ceph_do_pending_vmtruncate(struct inode *inode)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
u64 to;
|
|
int wrbuffer_refs, finish = 0;
|
|
|
|
mutex_lock(&ci->i_truncate_mutex);
|
|
retry:
|
|
spin_lock(&ci->i_ceph_lock);
|
|
if (ci->i_truncate_pending == 0) {
|
|
dout("__do_pending_vmtruncate %p none pending\n", inode);
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* make sure any dirty snapped pages are flushed before we
|
|
* possibly truncate them.. so write AND block!
|
|
*/
|
|
if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
|
|
struct ceph_cap_snap *capsnap;
|
|
to = ci->i_truncate_size;
|
|
list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
|
|
// MDS should have revoked Frw caps
|
|
WARN_ON_ONCE(capsnap->writing);
|
|
if (capsnap->dirty_pages && capsnap->size > to)
|
|
to = capsnap->size;
|
|
}
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
dout("__do_pending_vmtruncate %p flushing snaps first\n",
|
|
inode);
|
|
|
|
truncate_pagecache(inode, to);
|
|
|
|
filemap_write_and_wait_range(&inode->i_data, 0,
|
|
inode->i_sb->s_maxbytes);
|
|
goto retry;
|
|
}
|
|
|
|
/* there should be no reader or writer */
|
|
WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
|
|
|
|
to = ci->i_truncate_size;
|
|
wrbuffer_refs = ci->i_wrbuffer_ref;
|
|
dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
|
|
ci->i_truncate_pending, to);
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
|
|
truncate_pagecache(inode, to);
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
if (to == ci->i_truncate_size) {
|
|
ci->i_truncate_pending = 0;
|
|
finish = 1;
|
|
}
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
if (!finish)
|
|
goto retry;
|
|
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
|
|
if (wrbuffer_refs == 0)
|
|
ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
|
|
|
|
wake_up_all(&ci->i_cap_wq);
|
|
}
|
|
|
|
/*
|
|
* symlinks
|
|
*/
|
|
static const struct inode_operations ceph_symlink_iops = {
|
|
.get_link = simple_get_link,
|
|
.setattr = ceph_setattr,
|
|
.getattr = ceph_getattr,
|
|
.listxattr = ceph_listxattr,
|
|
};
|
|
|
|
int __ceph_setattr(struct inode *inode, struct iattr *attr)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
const unsigned int ia_valid = attr->ia_valid;
|
|
struct ceph_mds_request *req;
|
|
struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
|
|
struct ceph_cap_flush *prealloc_cf;
|
|
int issued;
|
|
int release = 0, dirtied = 0;
|
|
int mask = 0;
|
|
int err = 0;
|
|
int inode_dirty_flags = 0;
|
|
bool lock_snap_rwsem = false;
|
|
|
|
prealloc_cf = ceph_alloc_cap_flush();
|
|
if (!prealloc_cf)
|
|
return -ENOMEM;
|
|
|
|
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
|
|
USE_AUTH_MDS);
|
|
if (IS_ERR(req)) {
|
|
ceph_free_cap_flush(prealloc_cf);
|
|
return PTR_ERR(req);
|
|
}
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
issued = __ceph_caps_issued(ci, NULL);
|
|
|
|
if (!ci->i_head_snapc &&
|
|
(issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
|
|
lock_snap_rwsem = true;
|
|
if (!down_read_trylock(&mdsc->snap_rwsem)) {
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
down_read(&mdsc->snap_rwsem);
|
|
spin_lock(&ci->i_ceph_lock);
|
|
issued = __ceph_caps_issued(ci, NULL);
|
|
}
|
|
}
|
|
|
|
dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
|
|
|
|
if (ia_valid & ATTR_UID) {
|
|
dout("setattr %p uid %d -> %d\n", inode,
|
|
from_kuid(&init_user_ns, inode->i_uid),
|
|
from_kuid(&init_user_ns, attr->ia_uid));
|
|
if (issued & CEPH_CAP_AUTH_EXCL) {
|
|
inode->i_uid = attr->ia_uid;
|
|
dirtied |= CEPH_CAP_AUTH_EXCL;
|
|
} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
|
|
!uid_eq(attr->ia_uid, inode->i_uid)) {
|
|
req->r_args.setattr.uid = cpu_to_le32(
|
|
from_kuid(&init_user_ns, attr->ia_uid));
|
|
mask |= CEPH_SETATTR_UID;
|
|
release |= CEPH_CAP_AUTH_SHARED;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_GID) {
|
|
dout("setattr %p gid %d -> %d\n", inode,
|
|
from_kgid(&init_user_ns, inode->i_gid),
|
|
from_kgid(&init_user_ns, attr->ia_gid));
|
|
if (issued & CEPH_CAP_AUTH_EXCL) {
|
|
inode->i_gid = attr->ia_gid;
|
|
dirtied |= CEPH_CAP_AUTH_EXCL;
|
|
} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
|
|
!gid_eq(attr->ia_gid, inode->i_gid)) {
|
|
req->r_args.setattr.gid = cpu_to_le32(
|
|
from_kgid(&init_user_ns, attr->ia_gid));
|
|
mask |= CEPH_SETATTR_GID;
|
|
release |= CEPH_CAP_AUTH_SHARED;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_MODE) {
|
|
dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
|
|
attr->ia_mode);
|
|
if (issued & CEPH_CAP_AUTH_EXCL) {
|
|
inode->i_mode = attr->ia_mode;
|
|
dirtied |= CEPH_CAP_AUTH_EXCL;
|
|
} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
|
|
attr->ia_mode != inode->i_mode) {
|
|
inode->i_mode = attr->ia_mode;
|
|
req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
|
|
mask |= CEPH_SETATTR_MODE;
|
|
release |= CEPH_CAP_AUTH_SHARED;
|
|
}
|
|
}
|
|
|
|
if (ia_valid & ATTR_ATIME) {
|
|
dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
|
|
inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
|
|
attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
|
|
if (issued & CEPH_CAP_FILE_EXCL) {
|
|
ci->i_time_warp_seq++;
|
|
inode->i_atime = attr->ia_atime;
|
|
dirtied |= CEPH_CAP_FILE_EXCL;
|
|
} else if ((issued & CEPH_CAP_FILE_WR) &&
|
|
timespec_compare(&inode->i_atime,
|
|
&attr->ia_atime) < 0) {
|
|
inode->i_atime = attr->ia_atime;
|
|
dirtied |= CEPH_CAP_FILE_WR;
|
|
} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
|
|
!timespec_equal(&inode->i_atime, &attr->ia_atime)) {
|
|
ceph_encode_timespec(&req->r_args.setattr.atime,
|
|
&attr->ia_atime);
|
|
mask |= CEPH_SETATTR_ATIME;
|
|
release |= CEPH_CAP_FILE_SHARED |
|
|
CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_MTIME) {
|
|
dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
|
|
inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
|
|
attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
|
|
if (issued & CEPH_CAP_FILE_EXCL) {
|
|
ci->i_time_warp_seq++;
|
|
inode->i_mtime = attr->ia_mtime;
|
|
dirtied |= CEPH_CAP_FILE_EXCL;
|
|
} else if ((issued & CEPH_CAP_FILE_WR) &&
|
|
timespec_compare(&inode->i_mtime,
|
|
&attr->ia_mtime) < 0) {
|
|
inode->i_mtime = attr->ia_mtime;
|
|
dirtied |= CEPH_CAP_FILE_WR;
|
|
} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
|
|
!timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
|
|
ceph_encode_timespec(&req->r_args.setattr.mtime,
|
|
&attr->ia_mtime);
|
|
mask |= CEPH_SETATTR_MTIME;
|
|
release |= CEPH_CAP_FILE_SHARED |
|
|
CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_SIZE) {
|
|
dout("setattr %p size %lld -> %lld\n", inode,
|
|
inode->i_size, attr->ia_size);
|
|
if ((issued & CEPH_CAP_FILE_EXCL) &&
|
|
attr->ia_size > inode->i_size) {
|
|
i_size_write(inode, attr->ia_size);
|
|
inode->i_blocks = calc_inode_blocks(attr->ia_size);
|
|
ci->i_reported_size = attr->ia_size;
|
|
dirtied |= CEPH_CAP_FILE_EXCL;
|
|
} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
|
|
attr->ia_size != inode->i_size) {
|
|
req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
|
|
req->r_args.setattr.old_size =
|
|
cpu_to_le64(inode->i_size);
|
|
mask |= CEPH_SETATTR_SIZE;
|
|
release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL |
|
|
CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
|
|
}
|
|
}
|
|
|
|
/* these do nothing */
|
|
if (ia_valid & ATTR_CTIME) {
|
|
bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
|
|
ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
|
|
dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
|
|
inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
|
|
attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
|
|
only ? "ctime only" : "ignored");
|
|
if (only) {
|
|
/*
|
|
* if kernel wants to dirty ctime but nothing else,
|
|
* we need to choose a cap to dirty under, or do
|
|
* a almost-no-op setattr
|
|
*/
|
|
if (issued & CEPH_CAP_AUTH_EXCL)
|
|
dirtied |= CEPH_CAP_AUTH_EXCL;
|
|
else if (issued & CEPH_CAP_FILE_EXCL)
|
|
dirtied |= CEPH_CAP_FILE_EXCL;
|
|
else if (issued & CEPH_CAP_XATTR_EXCL)
|
|
dirtied |= CEPH_CAP_XATTR_EXCL;
|
|
else
|
|
mask |= CEPH_SETATTR_CTIME;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_FILE)
|
|
dout("setattr %p ATTR_FILE ... hrm!\n", inode);
|
|
|
|
if (dirtied) {
|
|
inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
|
|
&prealloc_cf);
|
|
inode->i_ctime = attr->ia_ctime;
|
|
}
|
|
|
|
release &= issued;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
if (lock_snap_rwsem)
|
|
up_read(&mdsc->snap_rwsem);
|
|
|
|
if (inode_dirty_flags)
|
|
__mark_inode_dirty(inode, inode_dirty_flags);
|
|
|
|
|
|
if (mask) {
|
|
req->r_inode = inode;
|
|
ihold(inode);
|
|
req->r_inode_drop = release;
|
|
req->r_args.setattr.mask = cpu_to_le32(mask);
|
|
req->r_num_caps = 1;
|
|
req->r_stamp = attr->ia_ctime;
|
|
err = ceph_mdsc_do_request(mdsc, NULL, req);
|
|
}
|
|
dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
|
|
ceph_cap_string(dirtied), mask);
|
|
|
|
ceph_mdsc_put_request(req);
|
|
ceph_free_cap_flush(prealloc_cf);
|
|
|
|
if (err >= 0 && (mask & CEPH_SETATTR_SIZE))
|
|
__ceph_do_pending_vmtruncate(inode);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* setattr
|
|
*/
|
|
int ceph_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
int err;
|
|
|
|
if (ceph_snap(inode) != CEPH_NOSNAP)
|
|
return -EROFS;
|
|
|
|
err = setattr_prepare(dentry, attr);
|
|
if (err != 0)
|
|
return err;
|
|
|
|
err = __ceph_setattr(inode, attr);
|
|
|
|
if (err >= 0 && (attr->ia_valid & ATTR_MODE))
|
|
err = posix_acl_chmod(inode, attr->ia_mode);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Verify that we have a lease on the given mask. If not,
|
|
* do a getattr against an mds.
|
|
*/
|
|
int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
|
|
int mask, bool force)
|
|
{
|
|
struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
|
|
struct ceph_mds_client *mdsc = fsc->mdsc;
|
|
struct ceph_mds_request *req;
|
|
int err;
|
|
|
|
if (ceph_snap(inode) == CEPH_SNAPDIR) {
|
|
dout("do_getattr inode %p SNAPDIR\n", inode);
|
|
return 0;
|
|
}
|
|
|
|
dout("do_getattr inode %p mask %s mode 0%o\n",
|
|
inode, ceph_cap_string(mask), inode->i_mode);
|
|
if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
|
|
return 0;
|
|
|
|
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
|
|
if (IS_ERR(req))
|
|
return PTR_ERR(req);
|
|
req->r_inode = inode;
|
|
ihold(inode);
|
|
req->r_num_caps = 1;
|
|
req->r_args.getattr.mask = cpu_to_le32(mask);
|
|
req->r_locked_page = locked_page;
|
|
err = ceph_mdsc_do_request(mdsc, NULL, req);
|
|
if (locked_page && err == 0) {
|
|
u64 inline_version = req->r_reply_info.targeti.inline_version;
|
|
if (inline_version == 0) {
|
|
/* the reply is supposed to contain inline data */
|
|
err = -EINVAL;
|
|
} else if (inline_version == CEPH_INLINE_NONE) {
|
|
err = -ENODATA;
|
|
} else {
|
|
err = req->r_reply_info.targeti.inline_len;
|
|
}
|
|
}
|
|
ceph_mdsc_put_request(req);
|
|
dout("do_getattr result=%d\n", err);
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* Check inode permissions. We verify we have a valid value for
|
|
* the AUTH cap, then call the generic handler.
|
|
*/
|
|
int ceph_permission(struct inode *inode, int mask)
|
|
{
|
|
int err;
|
|
|
|
if (mask & MAY_NOT_BLOCK)
|
|
return -ECHILD;
|
|
|
|
err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
|
|
|
|
if (!err)
|
|
err = generic_permission(inode, mask);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Get all attributes. Hopefully somedata we'll have a statlite()
|
|
* and can limit the fields we require to be accurate.
|
|
*/
|
|
int ceph_getattr(const struct path *path, struct kstat *stat,
|
|
u32 request_mask, unsigned int flags)
|
|
{
|
|
struct inode *inode = d_inode(path->dentry);
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int err;
|
|
|
|
err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
|
|
if (!err) {
|
|
generic_fillattr(inode, stat);
|
|
stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
|
|
if (ceph_snap(inode) != CEPH_NOSNAP)
|
|
stat->dev = ceph_snap(inode);
|
|
else
|
|
stat->dev = 0;
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
|
|
RBYTES))
|
|
stat->size = ci->i_rbytes;
|
|
else
|
|
stat->size = ci->i_files + ci->i_subdirs;
|
|
stat->blocks = 0;
|
|
stat->blksize = 65536;
|
|
}
|
|
}
|
|
return err;
|
|
}
|