mirror of https://gitee.com/openkylin/linux.git
1775 lines
48 KiB
C
1775 lines
48 KiB
C
#include "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/smp_lock.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/namei.h>
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#include <linux/writeback.h>
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#include <linux/vmalloc.h>
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#include <linux/pagevec.h>
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#include "super.h"
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#include "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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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 == NULL)
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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 ERR_PTR(PTR_ERR(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_dir_iops;
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inode->i_fop = &ceph_dir_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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.setxattr = ceph_setxattr,
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.getxattr = ceph_getxattr,
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.listxattr = ceph_listxattr,
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.removexattr = ceph_removexattr,
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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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pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
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"frag %x\n", &ci->vfs_inode,
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ceph_vinop(&ci->vfs_inode), f);
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return ERR_PTR(-ENOMEM);
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}
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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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u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
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struct ceph_inode_frag *pfrag,
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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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mutex_lock(&ci->i_fragtree_mutex);
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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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mutex_unlock(&ci->i_fragtree_mutex);
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return t;
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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 i;
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int err = 0;
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mutex_lock(&ci->i_fragtree_mutex);
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if (ndist == 0) {
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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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/*
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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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ci->i_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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ci->i_release_count = 0;
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ci->i_symlink = 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);
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INIT_LIST_HEAD(&ci->i_flushing_item);
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ci->i_cap_flush_seq = 0;
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ci->i_cap_flush_last_tid = 0;
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memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid));
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init_waitqueue_head(&ci->i_cap_wq);
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ci->i_hold_caps_min = 0;
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ci->i_hold_caps_max = 0;
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INIT_LIST_HEAD(&ci->i_cap_delay_list);
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ci->i_cap_exporting_mds = 0;
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ci->i_cap_exporting_mseq = 0;
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ci->i_cap_exporting_issued = 0;
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INIT_LIST_HEAD(&ci->i_cap_snaps);
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ci->i_head_snapc = NULL;
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ci->i_snap_caps = 0;
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for (i = 0; i < CEPH_FILE_MODE_NUM; i++)
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ci->i_nr_by_mode[i] = 0;
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ci->i_truncate_seq = 0;
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ci->i_truncate_size = 0;
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ci->i_truncate_pending = 0;
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ci->i_max_size = 0;
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ci->i_reported_size = 0;
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ci->i_wanted_max_size = 0;
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ci->i_requested_max_size = 0;
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ci->i_pin_ref = 0;
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ci->i_rd_ref = 0;
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ci->i_rdcache_ref = 0;
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ci->i_wr_ref = 0;
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ci->i_wrbuffer_ref = 0;
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ci->i_wrbuffer_ref_head = 0;
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ci->i_shared_gen = 0;
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ci->i_rdcache_gen = 0;
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ci->i_rdcache_revoking = 0;
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INIT_LIST_HEAD(&ci->i_unsafe_writes);
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INIT_LIST_HEAD(&ci->i_unsafe_dirops);
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spin_lock_init(&ci->i_unsafe_lock);
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ci->i_snap_realm = NULL;
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INIT_LIST_HEAD(&ci->i_snap_realm_item);
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INIT_LIST_HEAD(&ci->i_snap_flush_item);
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INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
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INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
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INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
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return &ci->vfs_inode;
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}
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void ceph_destroy_inode(struct inode *inode)
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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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struct rb_node *n;
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dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
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ceph_queue_caps_release(inode);
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/*
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* we may still have a snap_realm reference if there are stray
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* caps in i_cap_exporting_issued or i_snap_caps.
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*/
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if (ci->i_snap_realm) {
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struct ceph_mds_client *mdsc =
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&ceph_client(ci->vfs_inode.i_sb)->mdsc;
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struct ceph_snap_realm *realm = ci->i_snap_realm;
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dout(" dropping residual ref to snap realm %p\n", realm);
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spin_lock(&realm->inodes_with_caps_lock);
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list_del_init(&ci->i_snap_realm_item);
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spin_unlock(&realm->inodes_with_caps_lock);
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ceph_put_snap_realm(mdsc, realm);
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}
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kfree(ci->i_symlink);
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while ((n = rb_first(&ci->i_fragtree)) != NULL) {
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frag = rb_entry(n, struct ceph_inode_frag, node);
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rb_erase(n, &ci->i_fragtree);
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kfree(frag);
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}
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__ceph_destroy_xattrs(ci);
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if (ci->i_xattrs.blob)
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ceph_buffer_put(ci->i_xattrs.blob);
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if (ci->i_xattrs.prealloc_blob)
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ceph_buffer_put(ci->i_xattrs.prealloc_blob);
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kmem_cache_free(ceph_inode_cachep, ci);
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}
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/*
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* Helpers to fill in size, ctime, mtime, and atime. We have to be
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* careful because either the client or MDS may have more up to date
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* info, depending on which capabilities are held, and whether
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* time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
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* and size are monotonically increasing, except when utimes() or
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* truncate() increments the corresponding _seq values.)
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*/
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int ceph_fill_file_size(struct inode *inode, int issued,
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u32 truncate_seq, u64 truncate_size, u64 size)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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int queue_trunc = 0;
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if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
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(truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
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dout("size %lld -> %llu\n", inode->i_size, size);
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inode->i_size = size;
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inode->i_blocks = (size + (1<<9) - 1) >> 9;
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ci->i_reported_size = size;
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if (truncate_seq != ci->i_truncate_seq) {
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dout("truncate_seq %u -> %u\n",
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ci->i_truncate_seq, truncate_seq);
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ci->i_truncate_seq = truncate_seq;
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/*
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* If we hold relevant caps, or in the case where we're
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* not the only client referencing this file and we
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* don't hold those caps, then we need to check whether
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* the file is either opened or mmaped
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*/
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if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD|
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CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER|
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CEPH_CAP_FILE_EXCL)) ||
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mapping_mapped(inode->i_mapping) ||
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__ceph_caps_file_wanted(ci)) {
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ci->i_truncate_pending++;
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queue_trunc = 1;
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}
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}
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}
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if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
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ci->i_truncate_size != truncate_size) {
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dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
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truncate_size);
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ci->i_truncate_size = truncate_size;
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}
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return queue_trunc;
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}
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|
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void ceph_fill_file_time(struct inode *inode, int issued,
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u64 time_warp_seq, struct timespec *ctime,
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struct timespec *mtime, struct timespec *atime)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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int warn = 0;
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if (issued & (CEPH_CAP_FILE_EXCL|
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CEPH_CAP_FILE_WR|
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CEPH_CAP_FILE_BUFFER)) {
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if (timespec_compare(ctime, &inode->i_ctime) > 0) {
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dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
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inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
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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 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 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_reply_inode *info = iinfo->in;
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int i;
|
|
int issued, implemented;
|
|
struct timespec mtime, atime, ctime;
|
|
u32 nsplits;
|
|
struct ceph_buffer *xattr_blob = NULL;
|
|
int err = 0;
|
|
int queue_trunc = 0;
|
|
|
|
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 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);
|
|
}
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
/*
|
|
* provided version will be odd if inode value is projected,
|
|
* even if stable. skip the update if we have a newer info
|
|
* (e.g., due to inode info racing form multiple MDSs), or if
|
|
* we are getting projected (unstable) inode info.
|
|
*/
|
|
if (le64_to_cpu(info->version) > 0 &&
|
|
(ci->i_version & ~1) > le64_to_cpu(info->version))
|
|
goto no_change;
|
|
|
|
issued = __ceph_caps_issued(ci, &implemented);
|
|
issued |= implemented | __ceph_caps_dirty(ci);
|
|
|
|
/* update inode */
|
|
ci->i_version = le64_to_cpu(info->version);
|
|
inode->i_version++;
|
|
inode->i_rdev = le32_to_cpu(info->rdev);
|
|
|
|
if ((issued & CEPH_CAP_AUTH_EXCL) == 0) {
|
|
inode->i_mode = le32_to_cpu(info->mode);
|
|
inode->i_uid = le32_to_cpu(info->uid);
|
|
inode->i_gid = le32_to_cpu(info->gid);
|
|
dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
|
|
inode->i_uid, inode->i_gid);
|
|
}
|
|
|
|
if ((issued & CEPH_CAP_LINK_EXCL) == 0)
|
|
inode->i_nlink = le32_to_cpu(info->nlink);
|
|
|
|
/* be careful with mtime, atime, size */
|
|
ceph_decode_timespec(&atime, &info->atime);
|
|
ceph_decode_timespec(&mtime, &info->mtime);
|
|
ceph_decode_timespec(&ctime, &info->ctime);
|
|
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));
|
|
ceph_fill_file_time(inode, issued,
|
|
le32_to_cpu(info->time_warp_seq),
|
|
&ctime, &mtime, &atime);
|
|
|
|
ci->i_max_size = le64_to_cpu(info->max_size);
|
|
ci->i_layout = info->layout;
|
|
inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
|
|
|
|
/* xattrs */
|
|
/* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
|
|
if ((issued & CEPH_CAP_XATTR_EXCL) == 0 &&
|
|
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);
|
|
}
|
|
|
|
inode->i_mapping->a_ops = &ceph_aops;
|
|
inode->i_mapping->backing_dev_info =
|
|
&ceph_client(inode->i_sb)->backing_dev_info;
|
|
|
|
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) {
|
|
int symlen = iinfo->symlink_len;
|
|
char *sym;
|
|
|
|
BUG_ON(symlen != inode->i_size);
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
err = -ENOMEM;
|
|
sym = kmalloc(symlen+1, GFP_NOFS);
|
|
if (!sym)
|
|
goto out;
|
|
memcpy(sym, iinfo->symlink, symlen);
|
|
sym[symlen] = 0;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (!ci->i_symlink)
|
|
ci->i_symlink = sym;
|
|
else
|
|
kfree(sym); /* lost a race */
|
|
}
|
|
break;
|
|
case S_IFDIR:
|
|
inode->i_op = &ceph_dir_iops;
|
|
inode->i_fop = &ceph_dir_fops;
|
|
|
|
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);
|
|
|
|
/* set dir completion flag? */
|
|
if (ci->i_files == 0 && ci->i_subdirs == 0 &&
|
|
ceph_snap(inode) == CEPH_NOSNAP &&
|
|
(le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED)) {
|
|
dout(" marking %p complete (empty)\n", inode);
|
|
ci->i_ceph_flags |= CEPH_I_COMPLETE;
|
|
ci->i_max_offset = 2;
|
|
}
|
|
|
|
/* it may be better to set st_size in getattr instead? */
|
|
if (ceph_test_opt(ceph_client(inode->i_sb), RBYTES))
|
|
inode->i_size = ci->i_rbytes;
|
|
break;
|
|
default:
|
|
pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
|
|
ceph_vinop(inode), inode->i_mode);
|
|
}
|
|
|
|
no_change:
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
/* queue truncate if we saw i_size decrease */
|
|
if (queue_trunc)
|
|
ceph_queue_vmtruncate(inode);
|
|
|
|
/* populate frag tree */
|
|
/* FIXME: move me up, if/when version reflects fragtree changes */
|
|
nsplits = le32_to_cpu(info->fragtree.nsplits);
|
|
mutex_lock(&ci->i_fragtree_mutex);
|
|
for (i = 0; i < nsplits; i++) {
|
|
u32 id = le32_to_cpu(info->fragtree.splits[i].frag);
|
|
struct ceph_inode_frag *frag = __get_or_create_frag(ci, id);
|
|
|
|
if (IS_ERR(frag))
|
|
continue;
|
|
frag->split_by = le32_to_cpu(info->fragtree.splits[i].by);
|
|
dout(" frag %x split by %d\n", frag->frag, frag->split_by);
|
|
}
|
|
mutex_unlock(&ci->i_fragtree_mutex);
|
|
|
|
/* were we issued a capability? */
|
|
if (info->cap.caps) {
|
|
if (ceph_snap(inode) == CEPH_NOSNAP) {
|
|
ceph_add_cap(inode, session,
|
|
le64_to_cpu(info->cap.cap_id),
|
|
cap_fmode,
|
|
le32_to_cpu(info->cap.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,
|
|
caps_reservation);
|
|
} else {
|
|
spin_lock(&inode->i_lock);
|
|
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);
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
}
|
|
|
|
/* update delegation info? */
|
|
if (dirinfo)
|
|
ceph_fill_dirfrag(inode, dirinfo);
|
|
|
|
err = 0;
|
|
|
|
out:
|
|
if (xattr_blob)
|
|
ceph_buffer_put(xattr_blob);
|
|
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_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;
|
|
|
|
/* only track leases on regular dentries */
|
|
if (dentry->d_op != &ceph_dentry_ops)
|
|
return;
|
|
|
|
spin_lock(&dentry->d_lock);
|
|
dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n",
|
|
dentry, le16_to_cpu(lease->mask), duration, ttl);
|
|
|
|
/* make lease_rdcache_gen match directory */
|
|
dir = dentry->d_parent->d_inode;
|
|
di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
|
|
|
|
if (lease->mask == 0)
|
|
goto out_unlock;
|
|
|
|
if (di->lease_gen == session->s_cap_gen &&
|
|
time_before(ttl, dentry->d_time))
|
|
goto out_unlock; /* we already have a newer lease. */
|
|
|
|
if (di->lease_session && di->lease_session != session)
|
|
goto out_unlock;
|
|
|
|
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;
|
|
dentry->d_time = ttl;
|
|
out_unlock:
|
|
spin_unlock(&dentry->d_lock);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* splice a dentry to an inode.
|
|
* caller must hold directory i_mutex for this to be safe.
|
|
*
|
|
* we will only rehash the resulting dentry if @prehash is
|
|
* true; @prehash will be set to false (for the benefit of
|
|
* the caller) if we fail.
|
|
*/
|
|
static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
|
|
bool *prehash)
|
|
{
|
|
struct dentry *realdn;
|
|
|
|
/* dn must be unhashed */
|
|
if (!d_unhashed(dn))
|
|
d_drop(dn);
|
|
realdn = d_materialise_unique(dn, in);
|
|
if (IS_ERR(realdn)) {
|
|
pr_err("splice_dentry error %p inode %p ino %llx.%llx\n",
|
|
dn, in, ceph_vinop(in));
|
|
if (prehash)
|
|
*prehash = false; /* don't rehash on error */
|
|
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, atomic_read(&dn->d_count),
|
|
realdn, atomic_read(&realdn->d_count),
|
|
realdn->d_inode, ceph_vinop(realdn->d_inode));
|
|
dput(dn);
|
|
dn = realdn;
|
|
} else {
|
|
BUG_ON(!ceph_dentry(dn));
|
|
|
|
dout("dn %p attached to %p ino %llx.%llx\n",
|
|
dn, dn->d_inode, ceph_vinop(dn->d_inode));
|
|
}
|
|
if ((!prehash || *prehash) && d_unhashed(dn))
|
|
d_rehash(dn);
|
|
out:
|
|
return dn;
|
|
}
|
|
|
|
/*
|
|
* Set dentry's directory position based on the current dir's max, and
|
|
* order it in d_subdirs, so that dcache_readdir behaves.
|
|
*/
|
|
static void ceph_set_dentry_offset(struct dentry *dn)
|
|
{
|
|
struct dentry *dir = dn->d_parent;
|
|
struct inode *inode = dn->d_parent->d_inode;
|
|
struct ceph_dentry_info *di;
|
|
|
|
BUG_ON(!inode);
|
|
|
|
di = ceph_dentry(dn);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
di->offset = ceph_inode(inode)->i_max_offset++;
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
spin_lock(&dcache_lock);
|
|
spin_lock(&dn->d_lock);
|
|
list_move_tail(&dir->d_subdirs, &dn->d_u.d_child);
|
|
dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset,
|
|
dn->d_u.d_child.prev, dn->d_u.d_child.next);
|
|
spin_unlock(&dn->d_lock);
|
|
spin_unlock(&dcache_lock);
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
|
|
struct inode *in = NULL;
|
|
struct ceph_mds_reply_inode *ininfo;
|
|
struct ceph_vino vino;
|
|
struct ceph_client *client = ceph_sb_to_client(sb);
|
|
int i = 0;
|
|
int err = 0;
|
|
|
|
dout("fill_trace %p is_dentry %d is_target %d\n", req,
|
|
rinfo->head->is_dentry, rinfo->head->is_target);
|
|
|
|
#if 0
|
|
/*
|
|
* Debugging hook:
|
|
*
|
|
* If we resend completed ops to a recovering mds, we get no
|
|
* trace. Since that is very rare, pretend this is the case
|
|
* to ensure the 'no trace' handlers in the callers behave.
|
|
*
|
|
* Fill in inodes unconditionally to avoid breaking cap
|
|
* invariants.
|
|
*/
|
|
if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
|
|
pr_info("fill_trace faking empty trace on %lld %s\n",
|
|
req->r_tid, ceph_mds_op_name(rinfo->head->op));
|
|
if (rinfo->head->is_dentry) {
|
|
rinfo->head->is_dentry = 0;
|
|
err = fill_inode(req->r_locked_dir,
|
|
&rinfo->diri, rinfo->dirfrag,
|
|
session, req->r_request_started, -1);
|
|
}
|
|
if (rinfo->head->is_target) {
|
|
rinfo->head->is_target = 0;
|
|
ininfo = rinfo->targeti.in;
|
|
vino.ino = le64_to_cpu(ininfo->ino);
|
|
vino.snap = le64_to_cpu(ininfo->snapid);
|
|
in = ceph_get_inode(sb, vino);
|
|
err = fill_inode(in, &rinfo->targeti, NULL,
|
|
session, req->r_request_started,
|
|
req->r_fmode);
|
|
iput(in);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
|
|
dout("fill_trace reply is empty!\n");
|
|
if (rinfo->head->result == 0 && req->r_locked_dir) {
|
|
struct ceph_inode_info *ci =
|
|
ceph_inode(req->r_locked_dir);
|
|
dout(" clearing %p complete (empty trace)\n",
|
|
req->r_locked_dir);
|
|
ci->i_ceph_flags &= ~CEPH_I_COMPLETE;
|
|
ci->i_release_count++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (rinfo->head->is_dentry) {
|
|
struct inode *dir = req->r_locked_dir;
|
|
|
|
err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag,
|
|
session, req->r_request_started, -1,
|
|
&req->r_caps_reservation);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ignore null lease/binding on snapdir ENOENT, or else we
|
|
* will have trouble splicing in the virtual snapdir later
|
|
*/
|
|
if (rinfo->head->is_dentry && !req->r_aborted &&
|
|
(rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
|
|
client->mount_args->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_locked_dir;
|
|
struct dentry *dn = req->r_dentry;
|
|
bool have_dir_cap, have_lease;
|
|
|
|
BUG_ON(!dn);
|
|
BUG_ON(!dir);
|
|
BUG_ON(dn->d_parent->d_inode != dir);
|
|
BUG_ON(ceph_ino(dir) !=
|
|
le64_to_cpu(rinfo->diri.in->ino));
|
|
BUG_ON(ceph_snap(dir) !=
|
|
le64_to_cpu(rinfo->diri.in->snapid));
|
|
|
|
/* 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 ||
|
|
(le16_to_cpu(rinfo->dlease->mask) &
|
|
CEPH_LOCK_DN);
|
|
|
|
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) {
|
|
dout(" src %p '%.*s' dst %p '%.*s'\n",
|
|
req->r_old_dentry,
|
|
req->r_old_dentry->d_name.len,
|
|
req->r_old_dentry->d_name.name,
|
|
dn, dn->d_name.len, dn->d_name.name);
|
|
dout("fill_trace doing d_move %p -> %p\n",
|
|
req->r_old_dentry, dn);
|
|
d_move(req->r_old_dentry, dn);
|
|
dout(" src %p '%.*s' dst %p '%.*s'\n",
|
|
req->r_old_dentry,
|
|
req->r_old_dentry->d_name.len,
|
|
req->r_old_dentry->d_name.name,
|
|
dn, dn->d_name.len, dn->d_name.name);
|
|
/* ensure target dentry is invalidated, despite
|
|
rehashing bug in vfs_rename_dir */
|
|
dn->d_time = jiffies;
|
|
ceph_dentry(dn)->lease_shared_gen = 0;
|
|
/* take overwritten dentry's readdir offset */
|
|
ceph_dentry(req->r_old_dentry)->offset =
|
|
ceph_dentry(dn)->offset;
|
|
dn = req->r_old_dentry; /* use old_dentry */
|
|
in = dn->d_inode;
|
|
}
|
|
|
|
/* null dentry? */
|
|
if (!rinfo->head->is_target) {
|
|
dout("fill_trace null dentry\n");
|
|
if (dn->d_inode) {
|
|
dout("d_delete %p\n", dn);
|
|
d_delete(dn);
|
|
} else {
|
|
dout("d_instantiate %p NULL\n", dn);
|
|
d_instantiate(dn, NULL);
|
|
if (have_lease && d_unhashed(dn))
|
|
d_rehash(dn);
|
|
update_dentry_lease(dn, rinfo->dlease,
|
|
session,
|
|
req->r_request_started);
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
/* attach proper inode */
|
|
ininfo = rinfo->targeti.in;
|
|
vino.ino = le64_to_cpu(ininfo->ino);
|
|
vino.snap = le64_to_cpu(ininfo->snapid);
|
|
if (!dn->d_inode) {
|
|
in = ceph_get_inode(sb, vino);
|
|
if (IS_ERR(in)) {
|
|
pr_err("fill_trace bad get_inode "
|
|
"%llx.%llx\n", vino.ino, vino.snap);
|
|
err = PTR_ERR(in);
|
|
d_delete(dn);
|
|
goto done;
|
|
}
|
|
dn = splice_dentry(dn, in, &have_lease);
|
|
if (IS_ERR(dn)) {
|
|
err = PTR_ERR(dn);
|
|
goto done;
|
|
}
|
|
req->r_dentry = dn; /* may have spliced */
|
|
ceph_set_dentry_offset(dn);
|
|
igrab(in);
|
|
} else if (ceph_ino(in) == vino.ino &&
|
|
ceph_snap(in) == vino.snap) {
|
|
igrab(in);
|
|
} else {
|
|
dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
|
|
dn, in, ceph_ino(in), ceph_snap(in),
|
|
vino.ino, vino.snap);
|
|
have_lease = false;
|
|
in = NULL;
|
|
}
|
|
|
|
if (have_lease)
|
|
update_dentry_lease(dn, rinfo->dlease, session,
|
|
req->r_request_started);
|
|
dout(" final dn %p\n", dn);
|
|
i++;
|
|
} else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
|
|
req->r_op == CEPH_MDS_OP_MKSNAP) {
|
|
struct dentry *dn = req->r_dentry;
|
|
|
|
/* fill out a snapdir LOOKUPSNAP dentry */
|
|
BUG_ON(!dn);
|
|
BUG_ON(!req->r_locked_dir);
|
|
BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR);
|
|
ininfo = rinfo->targeti.in;
|
|
vino.ino = le64_to_cpu(ininfo->ino);
|
|
vino.snap = le64_to_cpu(ininfo->snapid);
|
|
in = ceph_get_inode(sb, vino);
|
|
if (IS_ERR(in)) {
|
|
pr_err("fill_inode get_inode badness %llx.%llx\n",
|
|
vino.ino, vino.snap);
|
|
err = PTR_ERR(in);
|
|
d_delete(dn);
|
|
goto done;
|
|
}
|
|
dout(" linking snapped dir %p to dn %p\n", in, dn);
|
|
dn = splice_dentry(dn, in, NULL);
|
|
if (IS_ERR(dn)) {
|
|
err = PTR_ERR(dn);
|
|
goto done;
|
|
}
|
|
ceph_set_dentry_offset(dn);
|
|
req->r_dentry = dn; /* may have spliced */
|
|
igrab(in);
|
|
rinfo->head->is_dentry = 1; /* fool notrace handlers */
|
|
}
|
|
|
|
if (rinfo->head->is_target) {
|
|
vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
|
|
if (in == NULL || ceph_ino(in) != vino.ino ||
|
|
ceph_snap(in) != vino.snap) {
|
|
in = ceph_get_inode(sb, vino);
|
|
if (IS_ERR(in)) {
|
|
err = PTR_ERR(in);
|
|
goto done;
|
|
}
|
|
}
|
|
req->r_target_inode = in;
|
|
|
|
err = fill_inode(in,
|
|
&rinfo->targeti, NULL,
|
|
session, req->r_request_started,
|
|
(le32_to_cpu(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;
|
|
}
|
|
}
|
|
|
|
done:
|
|
dout("fill_trace done err=%d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Prepopulate our cache with readdir results, leases, etc.
|
|
*/
|
|
int ceph_readdir_prepopulate(struct ceph_mds_request *req,
|
|
struct ceph_mds_session *session)
|
|
{
|
|
struct dentry *parent = req->r_dentry;
|
|
struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
|
|
struct qstr dname;
|
|
struct dentry *dn;
|
|
struct inode *in;
|
|
int err = 0, i;
|
|
struct inode *snapdir = NULL;
|
|
struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
|
|
u64 frag = le32_to_cpu(rhead->args.readdir.frag);
|
|
struct ceph_dentry_info *di;
|
|
|
|
if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
|
|
snapdir = ceph_get_snapdir(parent->d_inode);
|
|
parent = d_find_alias(snapdir);
|
|
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(parent->d_inode, rinfo->dir_dir);
|
|
}
|
|
|
|
for (i = 0; i < rinfo->dir_nr; i++) {
|
|
struct ceph_vino vino;
|
|
|
|
dname.name = rinfo->dir_dname[i];
|
|
dname.len = rinfo->dir_dname_len[i];
|
|
dname.hash = full_name_hash(dname.name, dname.len);
|
|
|
|
vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
|
|
vino.snap = le64_to_cpu(rinfo->dir_in[i].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 == NULL) {
|
|
dout("d_alloc badness\n");
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
err = ceph_init_dentry(dn);
|
|
if (err < 0)
|
|
goto out;
|
|
} else if (dn->d_inode &&
|
|
(ceph_ino(dn->d_inode) != vino.ino ||
|
|
ceph_snap(dn->d_inode) != vino.snap)) {
|
|
dout(" dn %p points to wrong inode %p\n",
|
|
dn, dn->d_inode);
|
|
d_delete(dn);
|
|
dput(dn);
|
|
goto retry_lookup;
|
|
} else {
|
|
/* reorder parent's d_subdirs */
|
|
spin_lock(&dcache_lock);
|
|
spin_lock(&dn->d_lock);
|
|
list_move(&dn->d_u.d_child, &parent->d_subdirs);
|
|
spin_unlock(&dn->d_lock);
|
|
spin_unlock(&dcache_lock);
|
|
}
|
|
|
|
di = dn->d_fsdata;
|
|
di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset);
|
|
|
|
/* inode */
|
|
if (dn->d_inode) {
|
|
in = dn->d_inode;
|
|
} else {
|
|
in = ceph_get_inode(parent->d_sb, vino);
|
|
if (in == NULL) {
|
|
dout("new_inode badness\n");
|
|
d_delete(dn);
|
|
dput(dn);
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
dn = splice_dentry(dn, in, NULL);
|
|
}
|
|
|
|
if (fill_inode(in, &rinfo->dir_in[i], NULL, session,
|
|
req->r_request_started, -1,
|
|
&req->r_caps_reservation) < 0) {
|
|
pr_err("fill_inode badness on %p\n", in);
|
|
dput(dn);
|
|
continue;
|
|
}
|
|
update_dentry_lease(dn, rinfo->dir_dlease[i],
|
|
req->r_session, req->r_request_started);
|
|
dput(dn);
|
|
}
|
|
req->r_did_prepopulate = true;
|
|
|
|
out:
|
|
if (snapdir) {
|
|
iput(snapdir);
|
|
dput(parent);
|
|
}
|
|
dout("readdir_prepopulate done\n");
|
|
return err;
|
|
}
|
|
|
|
int ceph_inode_set_size(struct inode *inode, loff_t size)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int ret = 0;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
|
|
inode->i_size = size;
|
|
inode->i_blocks = (size + (1 << 9) - 1) >> 9;
|
|
|
|
/* tell the MDS if we are approaching max_size */
|
|
if ((size << 1) >= ci->i_max_size &&
|
|
(ci->i_reported_size << 1) < ci->i_max_size)
|
|
ret = 1;
|
|
|
|
spin_unlock(&inode->i_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)
|
|
{
|
|
if (queue_work(ceph_inode_to_client(inode)->wb_wq,
|
|
&ceph_inode(inode)->i_wb_work)) {
|
|
dout("ceph_queue_writeback %p\n", inode);
|
|
igrab(inode);
|
|
} else {
|
|
dout("ceph_queue_writeback %p failed\n", 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)
|
|
{
|
|
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);
|
|
igrab(inode);
|
|
} else {
|
|
dout("ceph_queue_invalidate %p failed\n", inode);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* invalidate any pages that are not dirty or under writeback. this
|
|
* includes pages that are clean and mapped.
|
|
*/
|
|
static void ceph_invalidate_nondirty_pages(struct address_space *mapping)
|
|
{
|
|
struct pagevec pvec;
|
|
pgoff_t next = 0;
|
|
int i;
|
|
|
|
pagevec_init(&pvec, 0);
|
|
while (pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) {
|
|
for (i = 0; i < pagevec_count(&pvec); i++) {
|
|
struct page *page = pvec.pages[i];
|
|
pgoff_t index;
|
|
int skip_page =
|
|
(PageDirty(page) || PageWriteback(page));
|
|
|
|
if (!skip_page)
|
|
skip_page = !trylock_page(page);
|
|
|
|
/*
|
|
* We really shouldn't be looking at the ->index of an
|
|
* unlocked page. But we're not allowed to lock these
|
|
* pages. So we rely upon nobody altering the ->index
|
|
* of this (pinned-by-us) page.
|
|
*/
|
|
index = page->index;
|
|
if (index > next)
|
|
next = index;
|
|
next++;
|
|
|
|
if (skip_page)
|
|
continue;
|
|
|
|
generic_error_remove_page(mapping, page);
|
|
unlock_page(page);
|
|
}
|
|
pagevec_release(&pvec);
|
|
cond_resched();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
u32 orig_gen;
|
|
int check = 0;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
dout("invalidate_pages %p gen %d revoking %d\n", inode,
|
|
ci->i_rdcache_gen, ci->i_rdcache_revoking);
|
|
if (ci->i_rdcache_gen == 0 ||
|
|
ci->i_rdcache_revoking != ci->i_rdcache_gen) {
|
|
BUG_ON(ci->i_rdcache_revoking > ci->i_rdcache_gen);
|
|
/* nevermind! */
|
|
ci->i_rdcache_revoking = 0;
|
|
spin_unlock(&inode->i_lock);
|
|
goto out;
|
|
}
|
|
orig_gen = ci->i_rdcache_gen;
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
ceph_invalidate_nondirty_pages(inode->i_mapping);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (orig_gen == ci->i_rdcache_gen) {
|
|
dout("invalidate_pages %p gen %d successful\n", inode,
|
|
ci->i_rdcache_gen);
|
|
ci->i_rdcache_gen = 0;
|
|
ci->i_rdcache_revoking = 0;
|
|
check = 1;
|
|
} else {
|
|
dout("invalidate_pages %p gen %d raced, gen now %d\n",
|
|
inode, orig_gen, ci->i_rdcache_gen);
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
if (check)
|
|
ceph_check_caps(ci, 0, NULL);
|
|
out:
|
|
iput(inode);
|
|
}
|
|
|
|
|
|
/*
|
|
* called by trunc_wq; take i_mutex ourselves
|
|
*
|
|
* 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);
|
|
mutex_lock(&inode->i_mutex);
|
|
__ceph_do_pending_vmtruncate(inode);
|
|
mutex_unlock(&inode->i_mutex);
|
|
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);
|
|
|
|
if (queue_work(ceph_client(inode->i_sb)->trunc_wq,
|
|
&ci->i_vmtruncate_work)) {
|
|
dout("ceph_queue_vmtruncate %p\n", inode);
|
|
igrab(inode);
|
|
} else {
|
|
dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
|
|
inode, ci->i_truncate_pending);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* called with i_mutex held.
|
|
*
|
|
* 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, wake = 0;
|
|
|
|
retry:
|
|
spin_lock(&inode->i_lock);
|
|
if (ci->i_truncate_pending == 0) {
|
|
dout("__do_pending_vmtruncate %p none pending\n", inode);
|
|
spin_unlock(&inode->i_lock);
|
|
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) {
|
|
dout("__do_pending_vmtruncate %p flushing snaps first\n",
|
|
inode);
|
|
spin_unlock(&inode->i_lock);
|
|
filemap_write_and_wait_range(&inode->i_data, 0,
|
|
inode->i_sb->s_maxbytes);
|
|
goto retry;
|
|
}
|
|
|
|
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(&inode->i_lock);
|
|
|
|
truncate_inode_pages(inode->i_mapping, to);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
ci->i_truncate_pending--;
|
|
if (ci->i_truncate_pending == 0)
|
|
wake = 1;
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
if (wrbuffer_refs == 0)
|
|
ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
|
|
if (wake)
|
|
wake_up(&ci->i_cap_wq);
|
|
}
|
|
|
|
|
|
/*
|
|
* symlinks
|
|
*/
|
|
static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(dentry->d_inode);
|
|
nd_set_link(nd, ci->i_symlink);
|
|
return NULL;
|
|
}
|
|
|
|
static const struct inode_operations ceph_symlink_iops = {
|
|
.readlink = generic_readlink,
|
|
.follow_link = ceph_sym_follow_link,
|
|
};
|
|
|
|
/*
|
|
* setattr
|
|
*/
|
|
int ceph_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
struct inode *parent_inode = dentry->d_parent->d_inode;
|
|
const unsigned int ia_valid = attr->ia_valid;
|
|
struct ceph_mds_request *req;
|
|
struct ceph_mds_client *mdsc = &ceph_client(dentry->d_sb)->mdsc;
|
|
int issued;
|
|
int release = 0, dirtied = 0;
|
|
int mask = 0;
|
|
int err = 0;
|
|
|
|
if (ceph_snap(inode) != CEPH_NOSNAP)
|
|
return -EROFS;
|
|
|
|
__ceph_do_pending_vmtruncate(inode);
|
|
|
|
err = inode_change_ok(inode, attr);
|
|
if (err != 0)
|
|
return err;
|
|
|
|
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
|
|
USE_AUTH_MDS);
|
|
if (IS_ERR(req))
|
|
return PTR_ERR(req);
|
|
|
|
spin_lock(&inode->i_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,
|
|
inode->i_uid, 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 ||
|
|
attr->ia_uid != inode->i_uid) {
|
|
req->r_args.setattr.uid = cpu_to_le32(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,
|
|
inode->i_gid, 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 ||
|
|
attr->ia_gid != inode->i_gid) {
|
|
req->r_args.setattr.gid = cpu_to_le32(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) {
|
|
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_CACHE | 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 (attr->ia_size > inode->i_sb->s_maxbytes) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
if ((issued & CEPH_CAP_FILE_EXCL) &&
|
|
attr->ia_size > inode->i_size) {
|
|
inode->i_size = attr->ia_size;
|
|
inode->i_blocks =
|
|
(attr->ia_size + (1 << 9) - 1) >> 9;
|
|
inode->i_ctime = attr->ia_ctime;
|
|
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_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");
|
|
inode->i_ctime = attr->ia_ctime;
|
|
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) {
|
|
__ceph_mark_dirty_caps(ci, dirtied);
|
|
inode->i_ctime = CURRENT_TIME;
|
|
}
|
|
|
|
release &= issued;
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
if (mask) {
|
|
req->r_inode = igrab(inode);
|
|
req->r_inode_drop = release;
|
|
req->r_args.setattr.mask = cpu_to_le32(mask);
|
|
req->r_num_caps = 1;
|
|
err = ceph_mdsc_do_request(mdsc, parent_inode, req);
|
|
}
|
|
dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
|
|
ceph_cap_string(dirtied), mask);
|
|
|
|
ceph_mdsc_put_request(req);
|
|
__ceph_do_pending_vmtruncate(inode);
|
|
return err;
|
|
out:
|
|
spin_unlock(&inode->i_lock);
|
|
ceph_mdsc_put_request(req);
|
|
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, int mask)
|
|
{
|
|
struct ceph_client *client = ceph_sb_to_client(inode->i_sb);
|
|
struct ceph_mds_client *mdsc = &client->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\n", inode, ceph_cap_string(mask));
|
|
if (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 = igrab(inode);
|
|
req->r_num_caps = 1;
|
|
req->r_args.getattr.mask = cpu_to_le32(mask);
|
|
err = ceph_mdsc_do_request(mdsc, NULL, req);
|
|
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 = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED);
|
|
|
|
if (!err)
|
|
err = generic_permission(inode, mask, NULL);
|
|
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(struct vfsmount *mnt, struct dentry *dentry,
|
|
struct kstat *stat)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int err;
|
|
|
|
err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL);
|
|
if (!err) {
|
|
generic_fillattr(inode, stat);
|
|
stat->ino = inode->i_ino;
|
|
if (ceph_snap(inode) != CEPH_NOSNAP)
|
|
stat->dev = ceph_snap(inode);
|
|
else
|
|
stat->dev = 0;
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
stat->size = ci->i_rbytes;
|
|
stat->blocks = 0;
|
|
stat->blksize = 65536;
|
|
}
|
|
}
|
|
return err;
|
|
}
|