Add vfs_ring.

3 files changed, 122 insertions, 0 deletions

diff --git a/source3/modules/vfs_ring.c b/source3/modules/vfs_ring.c
new file mode 100644
index 00000000000..325e57e9a30
--- /dev/null
+++ b/source3/modules/vfs_ring.c
@@ -0,0 +1,113 @@
+/*
+ * VFS module implementing get_real_filename for Scality SOFS
+ *
+ * Copyright (C) 2016, Jean-Marc Saffroy <jm@scality.com>
+ *
+ * This program 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.
+ *
+ * This program 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/>.
+ */
+
+#include "includes.h"
+#include "smbd/smbd.h"
+
+#define DBG 10
+
+#define GRFN_PREFIX "scal.grfn."
+#define GRFN_PREFIX_LEN (sizeof(GRFN_PREFIX)-1)
+
+static int vfs_ring_get_real_filename(struct vfs_handle_struct *handle,
+				      const char *path,
+				      const char *name,
+				      TALLOC_CTX *mem_ctx,
+				      char **found_name)
+{
+	bool mangled;
+	char attr_name [NAME_MAX+1];
+	char attr_value[NAME_MAX+1];
+	int rc;
+	const struct smb_filename *smb_fname = NULL;
+
+	if (!strcmp(path, ""))
+		path = ".";
+
+	smb_fname = synthetic_smb_fname(talloc_tos(),
+		path,
+		NULL,
+		NULL,
+		0);
+	if (smb_fname == NULL) {
+		errno = ENOMEM;
+		return -1;
+	}
+
+	DEBUG(DBG, ("vfs_ring_get_real_filename: under \"%s\" lookup \"%s\"\n",
+		    path, name));
+
+	mangled = mangle_is_mangled(name, handle->conn->params);
+	if (mangled) {
+		return SMB_VFS_NEXT_GET_REAL_FILENAME(
+			handle, path, name, mem_ctx, found_name);
+	}
+
+	if (strlen(name) > NAME_MAX - GRFN_PREFIX_LEN) {
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+
+	strncpy(attr_name, GRFN_PREFIX, sizeof(attr_name));
+	strncpy(attr_name + GRFN_PREFIX_LEN, name,
+		sizeof(attr_name) - GRFN_PREFIX_LEN);
+
+	rc = SMB_VFS_NEXT_GETXATTR(handle, smb_fname, attr_name,
+				   attr_value, sizeof(attr_value));
+	if (rc < 0) {
+		DEBUG(DBG, ("vfs_ring_get_real_filename: getxattr(\"%s\",\"%s\") -> %s\n",
+			    path, name, strerror(errno)));
+		if (errno == EOPNOTSUPP)
+			return SMB_VFS_NEXT_GET_REAL_FILENAME(
+				handle, path, name, mem_ctx, found_name);
+		if (errno == ENOATTR)
+			errno = ENOENT;
+		return -1;
+	}
+
+	attr_value[rc] = 0;
+	*found_name = talloc_strdup(mem_ctx, attr_value);
+	if (*found_name == NULL) {
+		errno = ENOMEM;
+		return -1;
+	}
+
+	DEBUG(DBG, ("vfs_ring_get_real_filename: under \"%s\" found \"%s\" as \"%s\"\n",
+		    path, name, *found_name));
+
+	return 0;
+}
+
+static struct vfs_fn_pointers vfs_ring_fns = {
+	.get_real_filename_fn = vfs_ring_get_real_filename,
+};
+
+NTSTATUS vfs_ring_init(TALLOC_CTX *);
+NTSTATUS vfs_ring_init(TALLOC_CTX *ctx)
+{
+	NTSTATUS ret;
+
+	ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "ring",
+			       &vfs_ring_fns);
+	if (!NT_STATUS_IS_OK(ret)) {
+		return ret;
+	}
+
+	return ret;
+}
diff --git a/source3/modules/wscript_build b/source3/modules/wscript_build
index 09528f38070..9ae787aa6f4 100644
--- a/source3/modules/wscript_build
+++ b/source3/modules/wscript_build
@@ -598,6 +598,14 @@ bld.SAMBA3_MODULE('vfs_vxfs',
                  internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_vxfs'),
                  enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_vxfs'))
 
+bld.SAMBA3_MODULE('vfs_ring',
+                   subsystem='vfs',
+                   source='vfs_ring.c',
+                   deps='talloc',
+                   init_function='',
+                   internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_ring'),
+ 	           enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_ring'))
+
 bld.SAMBA3_MODULE('vfs_offline',
                  subsystem='vfs',
                  source='vfs_offline.c',
diff --git a/source3/wscript b/source3/wscript
index 335cfd797f1..3f490bae336 100644
--- a/source3/wscript
+++ b/source3/wscript
@@ -1941,6 +1941,7 @@ main() {
                                       vfs_media_harmony vfs_unityed_media vfs_fruit vfs_shell_snap
                                       vfs_commit vfs_worm vfs_crossrename vfs_linux_xfs_sgid
                                       vfs_time_audit vfs_offline vfs_virusfilter vfs_widelinks
+                                      vfs_ring
                                   '''))
     if host_os.rfind('linux') > -1:
         default_shared_modules.extend(['vfs_snapper'])