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| author | Yehuda Sadeh <yehuda@hq.newdream.net> | 2010-01-07 15:36:32 -0800 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2010-01-14 12:23:14 -0800 |
| commit | 4baa75ef0ed29adae03fcbbaa9aca1511a5a8cc9 (patch) | |
| tree | f3ba17caa2a8738eff064b611c1d7bb0610f3037 | |
| parent | 6a4ef48103a78a46b80e07fcd8ac4edda0c7128f (diff) | |
| download | op-kernel-dev-4baa75ef0ed29adae03fcbbaa9aca1511a5a8cc9.zip op-kernel-dev-4baa75ef0ed29adae03fcbbaa9aca1511a5a8cc9.tar.gz | |
ceph: change dentry offset and position after splice_dentry
This fixes a bug, where we had the parent list have dentries with
offsets that are not monotonically increasing, which caused the ceph
dcache_readdir to skip entries.
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
| -rw-r--r-- | fs/ceph/inode.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 8774b28..518beb6 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -817,6 +817,33 @@ out: } /* + * 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). @@ -987,6 +1014,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, 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) { @@ -1029,6 +1057,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, 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 */ |
