Added all files

1 files changed, 224 insertions, 0 deletions

diff --git a/xlators/cluster/dht/src/dht-linkfile.c b/xlators/cluster/dht/src/dht-linkfile.c
new file mode 100644
index 00000000000..9cc24ccf6b3
--- /dev/null
+++ b/xlators/cluster/dht/src/dht-linkfile.c
@@ -0,0 +1,224 @@
+/*
+   Copyright (c) 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+   This file is part of GlusterFS.
+
+   GlusterFS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License,
+   or (at your option) any later version.
+
+   GlusterFS is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see
+   <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+
+#include "glusterfs.h"
+#include "xlator.h"
+#include "compat.h"
+#include "dht-common.h"
+
+
+
+int
+dht_linkfile_xattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+			int op_ret, int op_errno)
+{
+	dht_local_t *local = NULL;
+
+
+	local = frame->local;
+	local->linkfile.linkfile_cbk (frame, cookie, this, op_ret, op_errno,
+				      local->linkfile.inode,
+				      &local->linkfile.stbuf);
+
+	return 0;
+}
+
+
+int
+dht_linkfile_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+			 int op_ret, int op_errno,
+			 inode_t *inode, struct stat *stbuf)
+{
+	dht_local_t  *local = NULL;
+	call_frame_t *prev = NULL;
+	dict_t       *xattr = NULL;
+	data_t       *str_data = NULL;
+	int           ret = -1;
+
+	local = frame->local;
+	prev  = cookie;
+
+	if (op_ret == -1)
+		goto err;
+
+	xattr = get_new_dict ();
+	if (!xattr) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"memory allocation failed :(");
+		op_errno = ENOMEM;
+		goto err;
+	}
+
+	local->linkfile.xattr = dict_ref (xattr);
+	local->linkfile.inode = inode_ref (inode);
+
+	str_data = str_to_data (local->linkfile.srcvol->name);
+	if (!str_data) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"memory allocation failed :(");
+		op_errno = ENOMEM;
+		goto err;
+	}
+
+	ret = dict_set (xattr, "trusted.glusterfs.dht.linkto", str_data);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to initialize linkfile data");
+		op_errno = EINVAL;
+	}
+	str_data = NULL;
+
+	local->linkfile.stbuf = *stbuf;
+
+	STACK_WIND (frame, dht_linkfile_xattr_cbk,
+		    prev->this, prev->this->fops->setxattr,
+		    &local->linkfile.loc, local->linkfile.xattr, 0);
+
+	return 0;
+
+err:
+	if (str_data) {
+		data_destroy (str_data);
+		str_data = NULL;
+	}
+
+	local->linkfile.linkfile_cbk (frame, cookie, this,
+				      op_ret, op_errno, inode, stbuf);
+	return 0;
+}
+
+
+int
+dht_linkfile_create (call_frame_t *frame, fop_mknod_cbk_t linkfile_cbk,
+		     xlator_t *tovol, xlator_t *fromvol, loc_t *loc)
+{
+	dht_local_t *local = NULL;
+
+
+	local = frame->local;
+	local->linkfile.linkfile_cbk = linkfile_cbk;
+	local->linkfile.srcvol = tovol;
+	loc_copy (&local->linkfile.loc, loc);
+
+	STACK_WIND (frame, dht_linkfile_create_cbk,
+		    fromvol, fromvol->fops->mknod, loc,
+		    S_IFREG | DHT_LINKFILE_MODE, 0);
+
+	return 0;
+}
+
+
+int
+dht_linkfile_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+			 int32_t op_ret, int32_t op_errno)
+{
+	dht_local_t   *local = NULL;
+	call_frame_t  *prev = NULL;
+	xlator_t      *subvol = NULL;
+
+	local = frame->local;
+	prev = cookie;
+	subvol = prev->this;
+
+	if (op_ret == -1) {
+		gf_log (this->name, GF_LOG_WARNING,
+			"unlinking linkfile %s on %s failed (%s)",
+			local->loc.path, subvol->name, strerror (op_errno));
+	}
+
+	DHT_STACK_DESTROY (frame);
+
+	return 0;
+}
+
+
+int
+dht_linkfile_unlink (call_frame_t *frame, xlator_t *this,
+		     xlator_t *subvol, loc_t *loc)
+{
+	call_frame_t *unlink_frame = NULL;
+	dht_local_t  *unlink_local = NULL;
+
+	unlink_frame = copy_frame (frame);
+	if (!unlink_frame) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"memory allocation failed :(");
+		goto err;
+	}
+
+	unlink_local = dht_local_init (unlink_frame);
+	if (!unlink_local) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"memory allocation failed :(");
+		goto err;
+	}
+
+	loc_copy (&unlink_local->loc, loc);
+
+	STACK_WIND (unlink_frame, dht_linkfile_unlink_cbk,
+		    subvol, subvol->fops->unlink,
+		    &unlink_local->loc);
+
+	return 0;
+err:
+	if (unlink_frame)
+		DHT_STACK_DESTROY (unlink_frame);
+
+	return -1;
+}
+
+
+xlator_t *
+dht_linkfile_subvol (xlator_t *this, inode_t *inode, struct stat *stbuf,
+		     dict_t *xattr)
+{
+	dht_conf_t *conf = NULL;
+	xlator_t   *subvol = NULL;
+	void       *volname = NULL;
+	int         i = 0, ret = 0;
+
+
+	conf = this->private;
+
+	if (!xattr)
+		goto out;
+
+	ret = dict_get_ptr (xattr, "trusted.glusterfs.dht.linkto", &volname);
+
+	if ((-1 == ret) || !volname)
+		goto out;
+
+	for (i = 0; i < conf->subvolume_cnt; i++) {
+		if (strcmp (conf->subvolumes[i]->name, (char *)volname) == 0) {
+			subvol = conf->subvolumes[i];
+			break;
+		}
+	}
+
+out:
+	return subvol;
+}
+
+