From 79f9f99ad1e3e19d4ac300573b51289e3ee8ba86 Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Tue, 29 Jan 2013 02:55:31 -0500 Subject: [PATCH] ceph: prepopulate inodes only when request is aborted If r_aborted is true, we do not hold the dir i_mutex, and cannot touch the dcache. However, we still need to update the inodes with the state returned by the MDS. Reported-by: Al Viro Signed-off-by: Sage Weil Signed-off-by: Al Viro --- fs/ceph/inode.c | 40 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 38 insertions(+), 2 deletions(-) diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 2971eaa65cdc..4bc086a72475 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1130,8 +1130,8 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, 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) { + } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || + req->r_op == CEPH_MDS_OP_MKSNAP) && !req->r_aborted) { struct dentry *dn = req->r_dentry; /* fill out a snapdir LOOKUPSNAP dentry */ @@ -1195,6 +1195,39 @@ done: /* * 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_vino vino; + struct inode *in; + int rc; + + vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); + vino.snap = le64_to_cpu(rinfo->dir_in[i].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, &rinfo->dir_in[i], 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; + continue; + } + } + + return err; +} + int ceph_readdir_prepopulate(struct ceph_mds_request *req, struct ceph_mds_session *session) { @@ -1209,6 +1242,9 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req, u64 frag = le32_to_cpu(rhead->args.readdir.frag); struct ceph_dentry_info *di; + if (req->r_aborted) + return readdir_prepopulate_inodes_only(req, session); + if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { snapdir = ceph_get_snapdir(parent->d_inode); parent = d_find_alias(snapdir); -- 2.30.2