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authorVikas Gorur <vikas@zresearch.com>2009-02-18 17:36:07 +0530
committerVikas Gorur <vikas@zresearch.com>2009-02-18 17:36:07 +0530
commit77adf4cd648dce41f89469dd185deec6b6b53a0b (patch)
tree02e155a5753b398ee572b45793f889b538efab6b /xlators/meta
parentf3b2e6580e5663292ee113c741343c8a43ee133f (diff)
Added all files
Diffstat (limited to 'xlators/meta')
-rw-r--r--xlators/meta/Makefile.am1
-rw-r--r--xlators/meta/src/Makefile.am10
-rw-r--r--xlators/meta/src/meta.c1285
-rw-r--r--xlators/meta/src/meta.h48
-rw-r--r--xlators/meta/src/misc.c67
-rw-r--r--xlators/meta/src/misc.h31
-rw-r--r--xlators/meta/src/tree.c176
-rw-r--r--xlators/meta/src/tree.h35
-rw-r--r--xlators/meta/src/view.c258
-rw-r--r--xlators/meta/src/view.h32
10 files changed, 1943 insertions, 0 deletions
diff --git a/xlators/meta/Makefile.am b/xlators/meta/Makefile.am
new file mode 100644
index 0000000..e1c45f3
--- /dev/null
+++ b/xlators/meta/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS=src \ No newline at end of file
diff --git a/xlators/meta/src/Makefile.am b/xlators/meta/src/Makefile.am
new file mode 100644
index 0000000..385ff55
--- /dev/null
+++ b/xlators/meta/src/Makefile.am
@@ -0,0 +1,10 @@
+xlator_PROGRAMS = meta.so
+xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/
+
+meta_so_SOURCES = meta.c tree.c misc.c view.c
+noinst_HEADERS = meta.h tree.h misc.h view.h
+
+AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall \
+ -I$(top_srcdir)/libglusterfs/src -shared -nostartfiles
+
+CLEANFILES =
diff --git a/xlators/meta/src/meta.c b/xlators/meta/src/meta.c
new file mode 100644
index 0000000..ce49ed2
--- /dev/null
+++ b/xlators/meta/src/meta.c
@@ -0,0 +1,1285 @@
+/*
+ Copyright (c) 2006, 2007, 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/>.
+*/
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "glusterfs.h"
+#include "dict.h"
+#include "xlator.h"
+
+#include "meta.h"
+#include "view.h"
+
+int32_t
+meta_getattr_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, buf);
+ return 0;
+}
+
+int32_t
+meta_getattr (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ if (file) {
+ if (file->fops && file->fops->getattr) {
+ STACK_WIND (frame, meta_getattr_cbk,
+ this, file->fops->getattr, path);
+ return 0;
+ }
+ else {
+ STACK_UNWIND (frame, 0, 0, file->stbuf);
+ return 0;
+ }
+ }
+ else {
+ STACK_WIND (frame, meta_getattr_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->getattr,
+ path);
+ return 0;
+ }
+}
+
+int32_t
+meta_chmod_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_chmod (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ mode_t mode)
+{
+ STACK_WIND (frame,
+ meta_chmod_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->chmod,
+ path,
+ mode);
+ return 0;
+}
+
+int32_t
+meta_chown_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_chown (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ uid_t uid,
+ gid_t gid)
+{
+ STACK_WIND (frame,
+ meta_chown_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->chown,
+ path,
+ uid,
+ gid);
+ return 0;
+}
+
+
+int32_t
+meta_truncate_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_truncate (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ off_t offset)
+{
+ STACK_WIND (frame,
+ meta_truncate_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->truncate,
+ path,
+ offset);
+ return 0;
+}
+
+
+int32_t
+meta_ftruncate_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_ftruncate (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *fd,
+ off_t offset)
+{
+ STACK_WIND (frame,
+ meta_ftruncate_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->ftruncate,
+ fd,
+ offset);
+ return 0;
+}
+
+
+int32_t
+meta_utimes_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_utimes (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ struct timespec *buf)
+{
+ STACK_WIND (frame,
+ meta_utimes_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->utimes,
+ path,
+ buf);
+ return 0;
+}
+
+
+int32_t
+meta_access_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_access (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ mode_t mode)
+{
+ STACK_WIND (frame,
+ meta_access_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->access,
+ path,
+ mode);
+ return 0;
+}
+
+int32_t
+meta_readlink_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ char *dest)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ dest);
+ return 0;
+}
+
+int32_t
+meta_readlink (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ size_t size)
+{
+ STACK_WIND (frame,
+ meta_readlink_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->readlink,
+ path,
+ size);
+ return 0;
+}
+
+int32_t
+meta_mknod_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_mknod (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ mode_t mode,
+ dev_t dev)
+{
+ STACK_WIND (frame,
+ meta_mknod_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->mknod,
+ path,
+ mode,
+ dev);
+ return 0;
+}
+
+int32_t
+meta_mkdir_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_mkdir (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ mode_t mode)
+{
+ STACK_WIND (frame,
+ meta_mkdir_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->mkdir,
+ path,
+ mode);
+ return 0;
+}
+
+int32_t
+meta_unlink_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_unlink (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ STACK_WIND (frame,
+ meta_unlink_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->unlink,
+ path);
+ return 0;
+}
+
+int32_t
+meta_rmdir_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_rmdir (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ STACK_WIND (frame,
+ meta_rmdir_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->rmdir,
+ path);
+ return 0;
+}
+
+int32_t
+meta_symlink_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_symlink (call_frame_t *frame,
+ xlator_t *this,
+ const char *oldpath,
+ const char *newpath)
+{
+ STACK_WIND (frame,
+ meta_symlink_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->symlink,
+ oldpath,
+ newpath);
+ return 0;
+}
+
+int32_t
+meta_rename_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_rename (call_frame_t *frame,
+ xlator_t *this,
+ const char *oldpath,
+ const char *newpath)
+{
+ STACK_WIND (frame,
+ meta_rename_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->rename,
+ oldpath,
+ newpath);
+ return 0;
+}
+
+int32_t
+meta_link_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_link (call_frame_t *frame,
+ xlator_t *this,
+ const char *oldpath,
+ const char *newpath)
+{
+ STACK_WIND (frame,
+ meta_link_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->link,
+ oldpath,
+ newpath);
+ return 0;
+}
+
+struct _open_local {
+ const char *path;
+};
+
+int32_t
+meta_open_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno,
+ dict_t *ctx, struct stat *buf)
+{
+ struct _open_local *local = frame->local;
+ if (local)
+ dict_set (ctx, this->name, str_to_data (local->path));
+ STACK_UNWIND (frame, op_ret, op_errno, ctx, buf);
+ return 0;
+}
+
+int32_t
+meta_open (call_frame_t *frame, xlator_t *this,
+ const char *path, int32_t flags, mode_t mode)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ if (file) {
+ if (file->fops && file->fops->open) {
+ struct _open_local *local = CALLOC (1, sizeof (struct _open_local));
+ ERR_ABORT (local);
+ local->path = strdup (path);
+ frame->local = local;
+ STACK_WIND (frame, meta_open_cbk,
+ this, file->fops->open,
+ path, flags, mode);
+ return 0;
+ }
+ else {
+ dict_t *ctx = get_new_dict ();
+ dict_ref (ctx);
+ dict_set (ctx, this->name, str_to_data (strdup (path)));
+ STACK_UNWIND (frame, 0, 0, ctx, file->stbuf);
+ return 0;
+ }
+ }
+ else {
+ STACK_WIND (frame, meta_open_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->open,
+ path, flags, mode);
+ return 0;
+ }
+}
+
+int32_t
+meta_create (call_frame_t *frame, xlator_t *this,
+ const char *path, int32_t flags, mode_t mode)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ if (file) {
+ if (file->fops && file->fops->create) {
+ struct _open_local *local = CALLOC (1, sizeof (struct _open_local));
+ ERR_ABORT (local);
+ local->path = strdup (path);
+ frame->local = local;
+ STACK_WIND (frame, meta_open_cbk,
+ this, file->fops->create,
+ path, flags, mode);
+ return 0;
+ }
+ else {
+ STACK_UNWIND (frame, -1, 0, NULL, NULL);
+ return 0;
+ }
+ }
+ else {
+ STACK_WIND (frame, meta_open_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->create,
+ path, flags, mode);
+ return 0;
+ }
+}
+
+int32_t
+meta_readv_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct iovec *vector,
+ int32_t count)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ vector,
+ count);
+ return 0;
+}
+
+int32_t
+meta_readv (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *fd,
+ size_t size,
+ off_t offset)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ data_t *path_data = dict_get (fd, this->name);
+
+ if (path_data) {
+ const char *path = data_to_str (path_data);
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ if (file && file->fops && file->fops->readv) {
+ STACK_WIND (frame, meta_readv_cbk,
+ this, file->fops->readv,
+ fd, size, offset);
+ return 0;
+ }
+ }
+ else {
+ STACK_WIND (frame, meta_readv_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->readv,
+ fd, size, offset);
+ return 0;
+ }
+}
+
+int32_t
+meta_writev_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame, op_ret, op_errno);
+ return 0;
+}
+
+int32_t
+meta_writev (call_frame_t *frame, xlator_t *this,
+ dict_t *fd,
+ struct iovec *vector, int32_t count, off_t offset)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ data_t *path_data = dict_get (fd, this->name);
+
+ if (path_data) {
+ const char *path = data_to_str (path_data);
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ if (file && file->fops && file->fops->writev) {
+ STACK_WIND (frame, meta_writev_cbk,
+ this, file->fops->writev,
+ fd, vector, count, offset);
+ return 0;
+ }
+ }
+ else {
+ STACK_WIND (frame, meta_readv_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->writev,
+ fd, vector, count, offset);
+ return 0;
+ }
+}
+
+int32_t
+meta_flush_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_flush (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *fd)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ data_t *path_data = dict_get (fd, this->name);
+
+ if (path_data) {
+ const char *path = data_to_str (path_data);
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ if (file) {
+ if (file->fops && file->fops->flush) {
+ STACK_WIND (frame, meta_flush_cbk,
+ this, file->fops->flush,
+ fd);
+ return 0;
+ }
+ else {
+ STACK_UNWIND (frame, 0, 0);
+ return 0;
+ }
+ }
+ }
+ else {
+ STACK_WIND (frame, meta_flush_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->flush,
+ fd);
+ return 0;
+ }
+}
+
+int32_t
+meta_release_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_release (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *fd)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ data_t *path_data = dict_get (fd, this->name);
+
+ if (path_data) {
+ const char *path = data_to_str (path_data);
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ if (file) {
+ dict_unref (fd);
+ STACK_UNWIND (frame, 0, 0);
+ return 0;
+ }
+ }
+ else {
+ STACK_WIND (frame, meta_release_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->release,
+ fd);
+ return 0;
+ }
+}
+
+int32_t
+meta_fsync_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_fsync (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *fd,
+ int32_t flags)
+{
+ STACK_WIND (frame,
+ meta_fsync_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->fsync,
+ fd,
+ flags);
+ return 0;
+}
+
+int32_t
+meta_fgetattr_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_fgetattr (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *fd)
+{
+ STACK_WIND (frame,
+ meta_fgetattr_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->fgetattr,
+ fd);
+ return 0;
+}
+
+int32_t
+meta_opendir_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ dict_t *fd)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ fd);
+ return 0;
+}
+
+int32_t
+meta_opendir (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ meta_dirent_t *dir = lookup_meta_entry (root, path, NULL);
+
+ if (dir) {
+ dict_t *ctx = get_new_dict ();
+ dict_set (ctx, this->name, str_to_data (strdup (path)));
+ STACK_UNWIND (frame, 0, 0, ctx);
+ return 0;
+ }
+ else {
+ STACK_WIND (frame, meta_opendir_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->opendir,
+ path);
+ return 0;
+ }
+}
+
+int32_t
+meta_readdir_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ dir_entry_t *entries,
+ int32_t count)
+{
+ meta_private_t *priv = (meta_private_t *)this->private;
+
+ if ((int) cookie == 1) {
+ dir_entry_t *dir = CALLOC (1, sizeof (dir_entry_t));
+ ERR_ABORT (dir);
+
+ dir->name = strdup (".meta");
+ memcpy (&dir->buf, priv->tree->stbuf, sizeof (struct stat));
+ dir->next = entries->next;
+ entries->next = dir;
+
+ STACK_UNWIND (frame, op_ret, op_errno, entries, count+1);
+ return 0;
+ }
+
+ STACK_UNWIND (frame, op_ret, op_errno, entries, count);
+ return 0;
+}
+
+int32_t
+meta_readdir (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+
+ meta_dirent_t *dir = lookup_meta_entry (root, path, NULL);
+ if (dir) {
+ if (dir->fops && dir->fops->readdir) {
+ STACK_WIND (frame, meta_readdir_cbk,
+ this, dir->fops->readdir, path);
+ return 0;
+ }
+ else {
+ int count = 0;
+ dir = dir->children;
+ dir_entry_t *entries = NULL;
+
+ while (dir) {
+ dir_entry_t *d = CALLOC (1, sizeof (dir_entry_t));
+ ERR_ABORT (d);
+ d->name = dir->name;
+ d->buf = *dir->stbuf;
+ d->next = entries;
+ entries = d;
+ count++;
+ dir = dir->next;
+ }
+
+ dir_entry_t *header = CALLOC (1, sizeof (dir_entry_t));
+ ERR_ABORT (header);
+ header->next = entries;
+ STACK_UNWIND (frame, 0, 0, header, count);
+ return 0;
+ }
+ }
+ else {
+ if (!strcmp (path, "/")) {
+ STACK_WIND_COOKIE (frame, meta_readdir_cbk,
+ (int) 1, /* cookie to tell _cbk to add .meta entry */
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->readdir,
+ path);
+ }
+ else {
+ STACK_WIND (frame, meta_readdir_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->readdir,
+ path);
+ }
+ }
+ return 0;
+}
+
+int32_t
+meta_releasedir_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_releasedir (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *fd)
+{
+ STACK_WIND (frame,
+ meta_releasedir_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->releasedir,
+ fd);
+ return 0;
+}
+
+int32_t
+meta_fsyncdir_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_fsyncdir (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *fd,
+ int32_t flags)
+{
+ STACK_WIND (frame,
+ meta_fsyncdir_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->fsyncdir,
+ fd,
+ flags);
+ return 0;
+}
+
+int32_t
+meta_statfs_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct statvfs *buf)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ buf);
+ return 0;
+}
+
+int32_t
+meta_statfs (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ STACK_WIND (frame,
+ meta_statfs_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->statfs,
+ path);
+ return 0;
+}
+
+int32_t
+meta_setxattr_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_setxattr (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ const char *name,
+ const char *value,
+ size_t size,
+ int32_t flags)
+{
+ STACK_WIND (frame,
+ meta_setxattr_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->setxattr,
+ path,
+ name,
+ value,
+ size,
+ flags);
+ return 0;
+}
+
+int32_t
+meta_getxattr_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ char *value)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ value);
+ return 0;
+}
+
+int32_t
+meta_getxattr (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ const char *name,
+ size_t size)
+{
+ STACK_WIND (frame,
+ meta_getxattr_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->getxattr,
+ path,
+ name,
+ size);
+ return 0;
+}
+
+int32_t
+meta_listxattr_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ char *value)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ value);
+ return 0;
+}
+
+int32_t
+meta_listxattr (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ size_t size)
+{
+ STACK_WIND (frame,
+ meta_listxattr_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->listxattr,
+ path,
+ size);
+ return 0;
+}
+
+int32_t
+meta_removexattr_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno);
+ return 0;
+}
+
+int32_t
+meta_removexattr (call_frame_t *frame,
+ xlator_t *this,
+ const char *path,
+ const char *name)
+{
+ STACK_WIND (frame,
+ meta_removexattr_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->removexattr,
+ path,
+ name);
+ return 0;
+}
+
+int32_t
+meta_lk_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct flock *lock)
+{
+ STACK_UNWIND (frame,
+ op_ret,
+ op_errno,
+ lock);
+ return 0;
+}
+
+int32_t
+meta_lk (call_frame_t *frame,
+ xlator_t *this,
+ dict_t *file,
+ int32_t cmd,
+ struct flock *lock)
+{
+ STACK_WIND (frame,
+ meta_lk_cbk,
+ FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lk,
+ file,
+ cmd,
+ lock);
+ return 0;
+}
+
+static void
+add_xlator_to_tree (meta_dirent_t *tree, xlator_t *this,
+ const char *prefix)
+{
+ char *dir;
+ asprintf (&dir, "%s/%s", prefix, this->name);
+
+ char *children;
+ asprintf (&children, "%s/%s", dir, "subvolumes");
+
+ char *type;
+ asprintf (&type, "%s/%s", dir, "type");
+
+ char *view;
+ asprintf (&view, "%s/%s", dir, "view");
+
+ insert_meta_entry (tree, dir, S_IFDIR, NULL, NULL);
+ insert_meta_entry (tree, children, S_IFDIR, NULL, NULL);
+ meta_dirent_t *v = insert_meta_entry (tree, view, S_IFDIR, NULL,
+ &meta_xlator_view_fops);
+ v->view_xlator = this;
+ meta_dirent_t *t = insert_meta_entry (tree, type, S_IFREG, NULL,
+ &meta_xlator_type_fops);
+ t->view_xlator = this;
+
+ xlator_list_t *trav = this->children;
+ while (trav) {
+ add_xlator_to_tree (tree, trav->xlator, children);
+ trav = trav->next;
+ }
+}
+
+static void
+build_meta_tree (xlator_t *this)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ priv->tree = CALLOC (1, sizeof (meta_dirent_t));
+ ERR_ABORT (priv->tree);
+ priv->tree->name = strdup (".meta");
+ priv->tree->stbuf = new_stbuf ();
+ priv->tree->stbuf->st_mode = S_IFDIR | S_IRUSR | S_IRGRP | S_IROTH |
+ S_IXUSR | S_IXGRP | S_IXOTH;
+
+ insert_meta_entry (priv->tree, "/.meta/version",
+ S_IFREG, NULL, &meta_version_fops);
+
+ insert_meta_entry (priv->tree, "/.meta/xlators",
+ S_IFDIR, NULL, NULL);
+
+ xlator_list_t *trav = this->children;
+ while (trav) {
+ add_xlator_to_tree (priv->tree, trav->xlator, "/.meta/xlators");
+ trav = trav->next;
+ }
+}
+
+int32_t
+init (xlator_t *this)
+{
+ if (this->parent != NULL) {
+ gf_log ("meta", GF_LOG_ERROR, "FATAL: meta should be the root of the xlator tree");
+ return -1;
+ }
+
+ meta_private_t *priv = CALLOC (1, sizeof (meta_private_t));
+ ERR_ABORT (priv);
+
+ data_t *directory = dict_get (this->options, "directory");
+ if (directory) {
+ priv->directory = strdup (data_to_str (directory));
+ }
+ else {
+ priv->directory = ".meta";
+ }
+
+ this->private = priv;
+ build_meta_tree (this);
+
+ return 0;
+}
+
+int32_t
+fini (xlator_t *this)
+{
+ return 0;
+}
+
+struct xlator_fops fops = {
+ .getattr = meta_getattr,
+ .readlink = meta_readlink,
+ .mknod = meta_mknod,
+ .mkdir = meta_mkdir,
+ .unlink = meta_unlink,
+ .rmdir = meta_rmdir,
+ .symlink = meta_symlink,
+ .rename = meta_rename,
+ .link = meta_link,
+ .chmod = meta_chmod,
+ .chown = meta_chown,
+ .truncate = meta_truncate,
+ .utimes = meta_utimes,
+ .open = meta_open,
+ .readv = meta_readv,
+ .writev = meta_writev,
+ .statfs = meta_statfs,
+ .flush = meta_flush,
+ .release = meta_release,
+ .fsync = meta_fsync,
+ .setxattr = meta_setxattr,
+ .getxattr = meta_getxattr,
+ .listxattr = meta_listxattr,
+ .removexattr = meta_removexattr,
+ .opendir = meta_opendir,
+ .readdir = meta_readdir,
+ .releasedir = meta_releasedir,
+ .fsyncdir = meta_fsyncdir,
+ .access = meta_access,
+ .ftruncate = meta_ftruncate,
+ .fgetattr = meta_fgetattr,
+ .create = meta_create,
+ .lk = meta_lk,
+};
+
+struct xlator_mops mops = {
+};
diff --git a/xlators/meta/src/meta.h b/xlators/meta/src/meta.h
new file mode 100644
index 0000000..6823ef8
--- /dev/null
+++ b/xlators/meta/src/meta.h
@@ -0,0 +1,48 @@
+/*
+ Copyright (c) 2006, 2007, 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 __META_H__
+#define __META_H__
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+struct _meta_dirent {
+ const char *name;
+ int type;
+ struct _meta_dirent *children;
+ struct _meta_dirent *parent;
+ struct _meta_dirent *next;
+ struct stat *stbuf;
+ xlator_t *view_xlator;
+ struct xlator_fops *fops;
+};
+typedef struct _meta_dirent meta_dirent_t;
+
+typedef struct {
+ const char *directory;
+ meta_dirent_t *tree;
+} meta_private_t;
+
+#include "tree.h"
+#include "misc.h"
+
+#endif /* __META_H__ */
diff --git a/xlators/meta/src/misc.c b/xlators/meta/src/misc.c
new file mode 100644
index 0000000..9c2f50d
--- /dev/null
+++ b/xlators/meta/src/misc.c
@@ -0,0 +1,67 @@
+/*
+ Copyright (c) 2006, 2007, 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/>.
+*/
+
+#include <unistd.h>
+#include <sys/uio.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "meta.h"
+
+#define min(x,y) ((x) < (y) ? (x) : (y))
+
+/* /.meta/version */
+static const char *version_str = PACKAGE_NAME " " PACKAGE_VERSION "\n";
+
+int32_t
+meta_version_readv (call_frame_t *frame, xlator_t *this,
+ dict_t *fd, size_t size, off_t offset)
+{
+ static int version_size;
+ version_size = strlen (version_str);
+
+ struct iovec vec;
+ vec.iov_base = version_str + offset;
+ vec.iov_len = min (version_size - offset, size);
+
+ STACK_UNWIND (frame, vec.iov_len, 0, &vec, 1);
+ return 0;
+}
+
+int32_t
+meta_version_getattr (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+ file->stbuf->st_size = strlen (version_str);
+ STACK_UNWIND (frame, 0, 0, file->stbuf);
+}
+
+struct xlator_fops meta_version_fops = {
+ .readv = meta_version_readv,
+ .getattr = meta_version_getattr
+};
+
diff --git a/xlators/meta/src/misc.h b/xlators/meta/src/misc.h
new file mode 100644
index 0000000..433c604
--- /dev/null
+++ b/xlators/meta/src/misc.h
@@ -0,0 +1,31 @@
+/*
+ Copyright (c) 2006, 2007, 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 __MISC_H__
+#define __MISC_H__
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+
+struct xlator_fops meta_version_fops;
+
+#endif /* __MISC_H__ */
diff --git a/xlators/meta/src/tree.c b/xlators/meta/src/tree.c
new file mode 100644
index 0000000..ec88c42
--- /dev/null
+++ b/xlators/meta/src/tree.c
@@ -0,0 +1,176 @@
+/*
+ Copyright (c) 2006, 2007, 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 <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "glusterfs.h"
+#include "xlator.h"
+
+#include "meta.h"
+
+static int
+is_meta_path (const char *path)
+{
+ while (*path == '/')
+ path++;
+ if (!strncmp (path, ".meta", strlen (".meta")))
+ return 1;
+ return 0;
+}
+
+struct stat *
+new_stbuf (void)
+{
+ static int next_inode = 0;
+ struct stat *stbuf = CALLOC (1, sizeof (struct stat));
+
+ ERR_ABORT (stbuf);
+
+ stbuf->st_dev = 0;
+ stbuf->st_ino = next_inode++;
+ stbuf->st_mode = S_IRUSR | S_IRGRP | S_IROTH;
+ stbuf->st_nlink = 1;
+ stbuf->st_uid = 0;
+ stbuf->st_gid = 0;
+ stbuf->st_rdev = 0;
+ stbuf->st_size = 0;
+ stbuf->st_blksize = 0;
+ stbuf->st_blocks = 0;
+ stbuf->st_atime = time (NULL);
+ stbuf->st_atim.tv_nsec = 0;
+ stbuf->st_mtime = stbuf->st_atime;
+ stbuf->st_mtim.tv_nsec = 0;
+ stbuf->st_ctime = stbuf->st_ctime;
+ stbuf->st_ctim.tv_nsec = 0;
+
+ return stbuf;
+}
+
+/* find an entry among the siblings of an entry */
+static meta_dirent_t *
+find_entry (meta_dirent_t *node, const char *dir)
+{
+ meta_dirent_t *trav = node;
+ while (trav) {
+ if (!strcmp (trav->name, dir))
+ return trav;
+ trav = trav->next;
+ }
+ return NULL;
+}
+
+/*
+ * Return the meta_dirent_t corresponding to the pathname.
+ *
+ * If pathname does not exist in the meta tree, try to return
+ * its highest parent that does exist. The part of the
+ * pathname that is left over is returned in the value-result
+ * variable {remain}.
+ * For example, for "/.meta/xlators/brick1/view/foo/bar/baz",
+ * return the entry for "/.meta/xlators/brick1/view"
+ * and set remain to "/bar/baz"
+ */
+
+meta_dirent_t *
+lookup_meta_entry (meta_dirent_t *root, const char *path,
+ char **remain)
+{
+ char *_path = strdup (path);
+
+ if (!is_meta_path (path))
+ return NULL;
+
+ meta_dirent_t *trav = root;
+ char *dir = strtok (_path, "/");
+ dir = strtok (NULL, "/");
+
+ while (dir) {
+ meta_dirent_t *ntrav;
+ ntrav = find_entry (trav->children, dir);
+ if (!ntrav) {
+ /* we have reached bottom of the meta tree.
+ Unknown dragons lie further below */
+ if (remain) {
+ char *piece = dir;
+ while (piece) {
+ char *tmp = *remain;
+ if (*remain)
+ asprintf (remain, "/%s/%s", *remain, piece);
+ else
+ asprintf (remain, "/%s", piece);
+ if (tmp) free (tmp);
+ piece = strtok (NULL, "/");
+ }
+ }
+ return trav;
+ }
+ dir = strtok (NULL, "/");
+ trav = ntrav;
+ }
+
+ free (_path);
+ return trav;
+}
+
+meta_dirent_t *
+insert_meta_entry (meta_dirent_t *root, const char *path,
+ int type, struct stat *stbuf, struct xlator_fops *fops)
+{
+ if (!is_meta_path (path))
+ return NULL;
+ char *slashpos = strrchr (path, '/');
+ char *dir = strndup (path, slashpos - path);
+ meta_dirent_t *parent = lookup_meta_entry (root, dir, NULL);
+ if (!dir)
+ return NULL;
+
+ meta_dirent_t *new = CALLOC (1, sizeof (meta_dirent_t));
+ ERR_ABORT (new);
+ new->name = strdup (slashpos+1);
+ new->type = type;
+ new->parent = parent;
+ new->next = parent->children;
+ parent->children = new;
+ if (stbuf)
+ new->stbuf = stbuf;
+ else
+ new->stbuf = new_stbuf ();
+
+ new->stbuf->st_mode |= type;
+ new->fops = fops;
+ return new;
+}
+
+int main (void)
+{
+ meta_dirent_t *root = CALLOC (1, sizeof (meta_dirent_t));
+ ERR_ABORT (root);
+ root->name = strdup (".meta");
+
+ insert_meta_entry (root, "/.meta/version", S_IFREG, NULL, NULL);
+ return 0;
+}
diff --git a/xlators/meta/src/tree.h b/xlators/meta/src/tree.h
new file mode 100644
index 0000000..eb2cf02
--- /dev/null
+++ b/xlators/meta/src/tree.h
@@ -0,0 +1,35 @@
+/*
+ Copyright (c) 2006, 2007, 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 __TREE_H__
+#define __TREE_H__
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+meta_dirent_t *
+insert_meta_entry (meta_dirent_t *root, const char *path,
+ int type, struct stat *stbuf, struct xlator_fops *fops);
+meta_dirent_t *
+lookup_meta_entry (meta_dirent_t *root, const char *path,
+ char **remain);
+
+#endif /* __TREE_H__ */
diff --git a/xlators/meta/src/view.c b/xlators/meta/src/view.c
new file mode 100644
index 0000000..7104d10
--- /dev/null
+++ b/xlators/meta/src/view.c
@@ -0,0 +1,258 @@
+/*
+ Copyright (c) 2006, 2007, 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 "meta.h"
+
+/*
+ * This file contains fops for the files and directories in
+ * an xlator directory
+ */
+
+/* /.meta/xlators/.../type */
+
+int32_t
+meta_xlator_type_readv (call_frame_t *frame, xlator_t *this,
+ dict_t *fd, size_t size, off_t offset)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ data_t *path_data = dict_get (fd, this->name);
+
+ if (path_data) {
+ const char *path = data_to_str (path_data);
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+ xlator_t *view_xlator = file->view_xlator;
+
+ int type_size;
+ type_size = strlen (view_xlator->type);
+
+ struct iovec vec;
+ vec.iov_base = view_xlator->type + offset;
+ vec.iov_len = min (type_size - offset, size);
+
+ STACK_UNWIND (frame, vec.iov_len, 0, &vec, 1);
+ return 0;
+ }
+}
+
+int32_t
+meta_xlator_type_getattr (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+ xlator_t *view_xlator = file->view_xlator;
+ file->stbuf->st_size = strlen (view_xlator->type);
+
+ STACK_UNWIND (frame, 0, 0, file->stbuf);
+ return 0;
+}
+
+struct xlator_fops meta_xlator_type_fops = {
+ .readv = meta_xlator_type_readv,
+ .getattr = meta_xlator_type_getattr
+};
+
+/*
+ * fops for the "view" directory
+ * {xlator}/view shows the filesystem as it appears
+ * to {xlator}
+ */
+
+static int32_t
+meta_xlator_view_getattr_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno,
+ struct stat *buf)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, buf);
+ return 0;
+}
+
+int32_t
+meta_xlator_view_getattr (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ char *op_path = NULL;
+
+ meta_dirent_t *file = lookup_meta_entry (root, path, &op_path);
+
+ if (op_path) {
+ STACK_WIND (frame, meta_xlator_view_getattr_cbk, file->view_xlator,
+ file->view_xlator->fops->getattr,
+ op_path);
+ }
+ else {
+ STACK_UNWIND (frame, 0, 0, file->stbuf);
+ }
+
+ return 0;
+}
+
+static int32_t
+meta_xlator_view_readdir_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno,
+ dir_entry_t *entries, int32_t count)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, entries, count);
+ return 0;
+}
+
+int32_t
+meta_xlator_view_readdir (call_frame_t *frame,
+ xlator_t *this,
+ const char *path)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ char *op_path = NULL;
+
+ meta_dirent_t *dir = lookup_meta_entry (root, path, &op_path);
+
+ STACK_WIND (frame, meta_xlator_view_readdir_cbk,
+ dir->view_xlator, dir->view_xlator->fops->readdir,
+ op_path ? op_path : "/");
+ return 0;
+}
+
+static int32_t
+meta_xlator_view_open_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this,
+ int32_t op_ret, int32_t op_errno,
+ dict_t *ctx, struct stat *buf)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, ctx, buf);
+ return 0;
+}
+
+int32_t
+meta_xlator_view_open (call_frame_t *frame, xlator_t *this,
+ const char *path, int32_t flags, mode_t mode)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ char *op_path = NULL;
+
+ meta_dirent_t *file = lookup_meta_entry (root, path, &op_path);
+ STACK_WIND (frame, meta_xlator_view_open_cbk,
+ file->view_xlator, file->view_xlator->fops->open,
+ op_path, flags, mode);
+ return 0;
+}
+
+int32_t
+meta_xlator_view_create (call_frame_t *frame, xlator_t *this,
+ const char *path, int32_t flags, mode_t mode)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ char *op_path = NULL;
+
+ meta_dirent_t *file = lookup_meta_entry (root, path, &op_path);
+ STACK_WIND (frame, meta_xlator_view_open_cbk,
+ file->view_xlator, file->view_xlator->fops->create,
+ op_path, flags, mode);
+ return 0;
+}
+
+static int32_t
+meta_xlator_view_readv_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret,
+ int32_t op_errno, struct iovec *vector,
+ int32_t count)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, vector, count);
+ return 0;
+}
+
+int32_t
+meta_xlator_view_readv (call_frame_t *frame, xlator_t *this,
+ dict_t *fd, size_t size, off_t offset)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ data_t *path_data = dict_get (fd, this->name);
+
+ if (path_data) {
+ const char *path = data_to_str (path_data);
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ STACK_WIND (frame, meta_xlator_view_readv_cbk,
+ file->view_xlator, file->view_xlator->fops->readv,
+ fd, size, offset);
+ return 0;
+ }
+
+ STACK_UNWIND (frame, -1, EBADFD, NULL, 0);
+ return 0;
+}
+
+static int32_t
+meta_xlator_view_writev_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret,
+ int32_t op_errno)
+{
+ STACK_UNWIND (frame, op_ret, op_errno);
+ return 0;
+}
+
+int32_t
+meta_xlator_view_writev (call_frame_t *frame, xlator_t *this,
+ dict_t *fd,
+ struct iovec *vector, int32_t count, off_t offset)
+{
+ meta_private_t *priv = (meta_private_t *) this->private;
+ meta_dirent_t *root = priv->tree;
+ data_t *path_data = dict_get (fd, this->name);
+
+ if (path_data) {
+ const char *path = data_to_str (path_data);
+ meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
+
+ STACK_WIND (frame, meta_xlator_view_writev_cbk,
+ file->view_xlator, file->view_xlator->fops->writev,
+ fd, vector, count, offset);
+ return 0;
+ }
+
+ STACK_UNWIND (frame, -1, EBADFD, NULL, 0);
+ return 0;
+}
+
+struct xlator_fops meta_xlator_view_fops = {
+ .getattr = meta_xlator_view_getattr,
+ .readdir = meta_xlator_view_readdir,
+ .open = meta_xlator_view_open,
+ .create = meta_xlator_view_create,
+ .readv = meta_xlator_view_readv,
+ .writev = meta_xlator_view_writev
+};
diff --git a/xlators/meta/src/view.h b/xlators/meta/src/view.h
new file mode 100644
index 0000000..2e1ac3e
--- /dev/null
+++ b/xlators/meta/src/view.h
@@ -0,0 +1,32 @@
+/*
+ Copyright (c) 2006, 2007, 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 __VIEW_H__
+#define __VIEW_H__
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+
+struct xlator_fops meta_xlator_type_fops;
+struct xlator_fops meta_xlator_view_fops;
+
+#endif /* __VIEW_H__ */