nfs: Add generic nfs translator

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 399 (NFS translator with Mount v3 and NFS v3 support)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=399

1 files changed, 174 insertions, 0 deletions

diff --git a/xlators/nfs/server/src/nfs-generics.h b/xlators/nfs/server/src/nfs-generics.h
new file mode 100644
index 00000000000..980e73020d4
--- /dev/null
+++ b/xlators/nfs/server/src/nfs-generics.h
@@ -0,0 +1,174 @@
+/*
+  Copyright (c) 2010 Gluster, Inc. <http://www.gluster.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 _NFS_GENERICS_H_
+#define _NFS_GENERICS_H_
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "nfs.h"
+#include "xlator.h"
+#include "nfs-fops.h"
+#include "nfs-inodes.h"
+
+struct nfs_direntcache {
+        gf_dirent_t entries;            /* Head of list of cached dirents. */
+        gf_dirent_t *next;              /* Pointer to the next entry that
+                                         * should be sent by readdir */
+        uint64_t prev_off;              /* Offset where the next read will
+                                         * happen.
+                                         */
+};
+
+/* WE're trying to abstract the fops interface from the NFS xlator so that
+ * different NFS versions can simply call a standard interface and have fop
+ * interface dependent functions be handled internally.
+ * This structure is part of such an  abstraction. The fops layer stores any
+ * state is requires in the fd. For eg, the dirent cache for a directory fd_t.
+ */
+typedef struct nfs_fop_fdcontext {
+        pthread_mutex_t         lock;
+        size_t                  dirent_bufsize;
+        off_t                   offset;
+        struct nfs_direntcache  *dcache;
+        xlator_t                *dirvol;
+} nfs_fdctx_t;
+
+extern int
+nfs_fstat (xlator_t *xl, nfs_user_t *nfu, fd_t *fd, fop_stat_cbk_t cbk,
+           void *local);
+
+extern int
+nfs_readdirp (xlator_t *xl, nfs_user_t *nfu, fd_t *dirfd, size_t bufsize,
+              off_t offset, fop_readdir_cbk_t cbk, void *local);
+
+
+extern int
+nfs_lookup (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
+            fop_lookup_cbk_t cbk, void *local);
+
+extern int
+nfs_create (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc, int flags,
+            mode_t mode, fop_create_cbk_t cbk, void *local);
+
+extern int
+nfs_flush (xlator_t *xl, nfs_user_t *nfu, fd_t *fd, fop_flush_cbk_t cbk,
+           void *local);
+
+extern int
+nfs_mkdir (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc, mode_t mode,
+           fop_mkdir_cbk_t cbk, void *local);
+
+extern int
+nfs_truncate (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc, off_t offset,
+              fop_truncate_cbk_t cbk, void *local);
+
+extern int
+nfs_read (xlator_t *xl, nfs_user_t *nfu, fd_t *fd, size_t size,
+          off_t offset, fop_readv_cbk_t cbk, void *local);
+
+extern int
+nfs_fsync (xlator_t *xl, nfs_user_t *nfu, fd_t *fd, int32_t datasync,
+           fop_fsync_cbk_t cbk, void *local);
+
+extern int
+nfs_write (xlator_t *xl, nfs_user_t *nfu, fd_t *fd, struct iobuf *srciob,
+           struct iovec *vector, int32_t count, off_t offset,
+           fop_writev_cbk_t cbk, void *local);
+
+extern int
+nfs_open (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc, int32_t flags,
+          fop_open_cbk_t cbk, void *local);
+
+extern int
+nfs_rename (xlator_t *xl, nfs_user_t *nfu, loc_t *oldloc, loc_t *newloc,
+            fop_rename_cbk_t cbk, void *local);
+
+extern int
+nfs_link (xlator_t *xl, nfs_user_t *nfu, loc_t *oldloc, loc_t *newloc,
+          fop_link_cbk_t cbk, void *local);
+
+extern int
+nfs_unlink (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
+            fop_unlink_cbk_t cbk, void *local);
+
+extern int
+nfs_rmdir (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
+           fop_rmdir_cbk_t cbk, void *local);
+
+extern int
+nfs_mknod (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc, mode_t mode,
+           dev_t dev, fop_mknod_cbk_t cbk, void *local);
+
+extern int
+nfs_readlink (xlator_t *xl, nfs_user_t *nfu, loc_t *linkloc,
+              fop_readlink_cbk_t cbk, void *local);
+
+extern int
+nfs_setattr (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
+             struct iatt *buf, int32_t valid, fop_setattr_cbk_t cbk,
+             void *local);
+
+extern int
+nfs_statfs (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
+            fop_statfs_cbk_t cbk, void *local);
+
+extern int
+nfs_stat (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc, fop_stat_cbk_t cbk
+          , void *local);
+
+extern int
+nfs_symlink (xlator_t *xl, nfs_user_t *nfu, char *target, loc_t *linkloc,
+             fop_symlink_cbk_t cbk, void *local);
+
+/* Synchronous equivalents */
+
+extern call_stub_t *
+nfs_open_sync (xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
+               int32_t flags);
+
+extern int
+nfs_readdir_sync (xlator_t *nfsx, xlator_t *fopxl, nfs_user_t *nfu,
+                  fd_t *dirfd, gf_dirent_t *entry);
+
+extern call_stub_t *
+nfs_flush_sync (xlator_t *xl, nfs_user_t *nfu, fd_t *fd);
+
+extern call_stub_t *
+nfs_write_sync (xlator_t *xl, nfs_user_t *nfu, fd_t *fd, struct iobuf *srciob,
+                struct iovec *vec, int count, off_t offset);
+
+extern call_stub_t *
+nfs_fsync_sync (xlator_t *xl, nfs_user_t *nfu, fd_t *fd, int32_t datasync);
+
+extern call_stub_t *
+nfs_read_sync (xlator_t *xl, nfs_user_t *nfu, fd_t *fd, size_t size,
+               off_t offset);
+
+extern call_stub_t *
+nfs_opendir_sync (xlator_t *nfsx, xlator_t *fopxl, nfs_user_t *nfu,
+                  loc_t *dirloc, size_t bufsize);
+
+extern int
+nfs_opendir (xlator_t *fopxl, nfs_user_t *nfu, loc_t *pathloc,
+             fop_opendir_cbk_t cbk, void *local);
+#endif