Merge remote-tracking branch 'ceph/master'

[karo-tx-linux.git] / fs / ceph / inode.c

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 8549a48115f71b23e1f35ef444caf3eb32dbced3..2ae1381de64a102c89d3fbe9b92dee3893fbbe7a 100644 (file)
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -436,6 +436,16 @@ void ceph_destroy_inode(struct inode *inode)
        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;
+}
+
 /*
  * 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
@@ -577,6 +587,8 @@ static int fill_inode(struct inode *inode,
        int issued = 0, implemented;
        struct timespec mtime, atime, ctime;
        u32 nsplits;
+       struct ceph_inode_frag *frag;
+       struct rb_node *rb_node;
        struct ceph_buffer *xattr_blob = NULL;
        int err = 0;
        int queue_trunc = 0;
@@ -751,15 +763,38 @@ no_change:
        /* FIXME: move me up, if/when version reflects fragtree changes */
        nsplits = le32_to_cpu(info->fragtree.nsplits);
        mutex_lock(&ci->i_fragtree_mutex);
+       rb_node = rb_first(&ci->i_fragtree);
        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 = NULL;
+               while (rb_node) {
+                       frag = rb_entry(rb_node, struct ceph_inode_frag, node);
+                       if (ceph_frag_compare(frag->frag, id) >= 0) {
+                               if (frag->frag != id)
+                                       frag = NULL;
+                               else
+                                       rb_node = rb_next(rb_node);
+                               break;
+                       }
+                       rb_node = rb_next(rb_node);
+                       rb_erase(&frag->node, &ci->i_fragtree);
+                       kfree(frag);
+                       frag = NULL;
+               }
+               if (!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);
        }
+       while (rb_node) {
+               frag = rb_entry(rb_node, struct ceph_inode_frag, node);
+               rb_node = rb_next(rb_node);
+               rb_erase(&frag->node, &ci->i_fragtree);
+               kfree(frag);
+       }
        mutex_unlock(&ci->i_fragtree_mutex);
 
        /* were we issued a capability? */
@@ -1250,8 +1285,20 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req,
        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;
+       u64 r_readdir_offset = req->r_readdir_offset;
+       u32 frag = le32_to_cpu(rhead->args.readdir.frag);
+
+       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 (ceph_frag_is_leftmost(frag))
+                       r_readdir_offset = 2;
+               else
+                       r_readdir_offset = 0;
+       }
 
        if (req->r_aborted)
                return readdir_prepopulate_inodes_only(req, session);
@@ -1315,7 +1362,7 @@ retry_lookup:
                }
 
                di = dn->d_fsdata;
-               di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset);
+               di->offset = ceph_make_fpos(frag, i + r_readdir_offset);
 
                /* inode */
                if (dn->d_inode) {