nfs: Add NFSv3 protocol support

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, 202 insertions, 0 deletions

diff --git a/xlators/nfs/server/src/nfs3.h b/xlators/nfs/server/src/nfs3.h
new file mode 100644
index 00000000000..1ec5a20a802
--- /dev/null
+++ b/xlators/nfs/server/src/nfs3.h
@@ -0,0 +1,202 @@
+/*
+  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 _NFS3_H_
+#define _NFS3_H_
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "rpcsvc.h"
+#include "dict.h"
+#include "xlator.h"
+#include "iobuf.h"
+#include "nfs.h"
+#include "nfs3-fh.h"
+#include "nfs-common.h"
+#include "xdr-nfs3.h"
+#include "mem-pool.h"
+
+#include <sys/statvfs.h>
+
+#define GF_NFS3                 GF_NFS"-nfsv3"
+#define GF_NFS3_PORT            38467
+
+#define GF_NFS3_DEFAULT_MEMFACTOR       15
+#define GF_NFS3_IOBPOOL_MULT            GF_NFS_CONCURRENT_OPS_MULT
+#define GF_NFS3_CLTABLE_BUCKETS_MULT    2
+#define GF_NFS3_FDTABLE_BUCKETS_MULT    2
+
+
+/* Static values used for FSINFO
+FIXME: This should be configurable */
+#define GF_NFS3_RTMAX      (64 * GF_UNIT_KB)
+#define GF_NFS3_RTPREF     (64 * GF_UNIT_KB)
+#define GF_NFS3_RTMULT     (4 * GF_UNIT_KB)
+#define GF_NFS3_WTMAX      (64 * GF_UNIT_KB)
+#define GF_NFS3_WTPREF     (64 * GF_UNIT_KB)
+#define GF_NFS3_WTMULT     (4 * GF_UNIT_KB)
+#define GF_NFS3_DTMIN      (4 * GF_UNIT_KB)
+#define GF_NFS3_DTPREF     (64 * GF_UNIT_KB)
+#define GF_NFS3_MAXFILE    (1 * GF_UNIT_PB)
+/* FIXME: Handle time resolutions */
+#define GF_NFS3_TIMEDELTA_SECS     {1,0}
+#define GF_NFS3_TIMEDELTA_NSECS    {0,1}
+#define GF_NFS3_TIMEDELTA_MSECS    {0,1000000}
+
+#define GF_NFS3_FS_PROP    (FSF3_LINK | FSF3_SYMLINK | FSF3_HOMOGENEOUS | FSF3_CANSETTIME)
+
+#define GF_NFS3_DIRFD_VALID        1
+#define GF_NFS3_DIRFD_INVALID      0
+
+#define GF_NFS3_VOLACCESS_RW    1
+#define GF_NFS3_VOLACCESS_RO    2
+
+
+#define GF_NFS3_FDCACHE_SIZE    512
+/* This should probably be moved to a more generic layer so that if needed
+ * different versions of NFS protocol can use the same thing.
+ */
+struct nfs3_fd_entry {
+        fd_t                    *cachedfd;
+        struct list_head        list;
+};
+
+/* Per subvolume nfs3 specific state */
+struct nfs3_export {
+        xlator_t                *subvol;
+        int                     access;
+};
+
+#define GF_NFS3_DEFAULT_VOLACCESS       (GF_NFS3_VOLACCESS_RW)
+
+/* The NFSv3 protocol state */
+struct nfs3_state {
+
+        /* The NFS xlator pointer. The NFS xlator can be running
+         * multiple versions of the NFS protocol.
+         */
+        xlator_t                *nfsx;
+
+        /* The iob pool from which memory allocations are made for receiving
+         * and sending network messages.
+         */
+        struct iobuf_pool       *iobpool;
+
+        /* List of child subvolumes for the NFSv3 protocol.
+         * Right now, is simply referring to the list of children in nfsx above.
+         */
+        xlator_list_t           *exportslist;
+
+        struct nfs3_export      *exports;
+        /* Mempool for allocations of struct nfs3_local */
+        struct mem_pool         *localpool;
+
+        /* Server start-up timestamp, currently used for write verifier. */
+        uint64_t                serverstart;
+
+        /* NFSv3 Protocol configurables */
+        size_t                  readsize;
+        size_t                  writesize;
+        size_t                  readdirsize;
+
+        /* Size of the iobufs used, depends on the sizes of the three params
+         * above.
+         */
+        size_t                  iobsize;
+
+        unsigned int            memfactor;
+
+        struct list_head        fdlru;
+        gf_lock_t               fdlrulock;
+        int                     fdcount;
+};
+
+
+typedef int (*nfs3_resume_fn_t) (void *cs);
+/* Structure used to communicate state between a fop and its callback.
+ * Not all members are used at all times. Usage is fop and NFS request
+ * dependent.
+ *
+ * I wish we could have a smaller structure for communicating state
+ * between callers and callbacks. It could be broken into smaller parts
+ * but I feel that will lead to a proliferation of types/structures and then
+ * we'll just be tracking down which structure is used by which fop, not
+ * to mention that having one type allows me to used a single mem-pool.
+ * Imagine the chaos if we need a mem-pool for each one of those sub-structures.
+ */
+struct nfs3_local {
+        rpcsvc_request_t        *req;
+        xlator_t                *vol;
+        nfs3_resume_fn_t        resume_fn;
+        xlator_t                *nfsx;
+
+        /* The list hook to attach this call state to the inode's queue till
+         * the opening of the fd on the inode completes.
+         */
+        struct list_head        openwait_q;
+
+        /* Per-NFSv3 Op state */
+        struct nfs3_fh          parent;
+        struct nfs3_fh          fh;
+        fd_t                    *fd;
+        uint32_t                accessbits;
+        int                     operrno;
+        count3                  dircount;
+        count3                  maxcount;
+        struct statvfs          fsstat;
+        gf_dirent_t             entries;
+        struct iatt             stbuf;
+        struct iatt             preparent;
+        struct iatt             postparent;
+        int32_t                 setattr_valid;
+        nfstime3                timestamp;
+        loc_t                   oploc;
+        int                     writetype;
+        count3                  datacount;
+        offset3                 dataoffset;
+        struct iobuf            *iob;
+        createmode3             createmode;
+        uint64_t                cookieverf;
+        int                     sattrguardcheck;
+        char                    *pathname;
+        ftype3                  mknodtype;
+        specdata3               devnums;
+        cookie3                 cookie;
+        struct iovec            datavec;
+        mode_t                  mode;
+
+        /* NFSv3 FH resolver state */
+        struct nfs3_fh          resolvefh;
+        loc_t                   resolvedloc;
+        int                     resolve_ret;
+        int                     resolve_errno;
+        int                     hashidx;
+        fd_t                    *resolve_dir_fd;
+        char                    *resolventry;
+};
+
+typedef struct nfs3_local nfs3_call_state_t;
+
+
+extern rpcsvc_program_t *
+nfs3svc_init (xlator_t *nfsx);
+#endif