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, 342 insertions, 0 deletions

diff --git a/xlators/nfs/server/src/nfs3-helpers.h b/xlators/nfs/server/src/nfs3-helpers.h
new file mode 100644
index 00000000000..a282bce6722
--- /dev/null
+++ b/xlators/nfs/server/src/nfs3-helpers.h
@@ -0,0 +1,342 @@
+/*
+  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_HELPER_H_
+#define _NFS3_HELPER_H_
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+
+#include "xlator.h"
+#include "nfs3.h"
+#include "nfs3-fh.h"
+#include "msg-nfs3.h"
+#include "xdr-nfs3.h"
+
+#include <sys/statvfs.h>
+
+#define GF_NFS3_FD_CACHED       0xcaced
+
+extern struct nfs3_fh
+nfs3_extract_lookup_fh (lookup3args *args);
+
+extern char *
+nfs3_extract_lookup_name (lookup3args *args);
+
+extern nfsstat3
+nfs3_errno_to_nfsstat3 (int errnum);
+
+extern void
+nfs3_fill_lookup3res (lookup3res *res, nfsstat3 stat, struct nfs3_fh *newfh,
+                      struct iatt *stbuf, struct iatt *postparent);
+
+extern post_op_attr
+nfs3_stat_to_post_op_attr (struct iatt *buf);
+
+extern struct nfs3_fh
+nfs3_extract_getattr_fh (getattr3args *args);
+
+extern void
+nfs3_fill_getattr3res (getattr3res *res, nfsstat3 stat, struct iatt *buf,
+                       uint16_t xlid);
+
+extern struct nfs3_fh
+nfs3_extract_fsinfo_fh (fsinfo3args *args);
+
+extern void
+nfs3_fill_fsinfo3res (struct nfs3_state *nfs3, fsinfo3res *res,
+                      nfsstat3 status, struct iatt *fsroot, uint16_t xlid);
+
+/* Functions containing _prep_ are used specifically to work around
+ * the memory allocations that happen inside Sun RPC library.
+ * In that library, there are numerous places where every NFS request
+ * can result in really tiny malloc calls. I fear the memory fragmentation
+ * that will follow. After studying the points at and the way in which malloc
+ * is called in Sun RPC, I've come up with this work-around. It is based on
+ * the idea that if the user/caller of the xdr_to_XXXXargs functions can provide
+ * already allocated memory or provide references to memory areas on its stack
+ * just for the short-term purpose of decoding the message from XDR format, we
+ * can avoid the memory allocations in Sun RPC. This is based on the fact
+ * that Sun RPC first checks whether structure members which require memory
+ * are NULL or not and only then calls malloc. In this case, if the caller
+ * provided references are non-NULL, then the if-branches containing malloc
+ * in Sun RPC will be avoided.
+ * PS: You're not expected to understand this unless you've spent some time
+ * looking through the glibc/sunrpc sources.
+ */
+extern void
+nfs3_prep_lookup3args (lookup3args *args, struct nfs3_fh *fh, char *name);
+
+extern void
+nfs3_prep_getattr3args (getattr3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_prep_fsinfo3args (fsinfo3args *args, struct nfs3_fh *root);
+
+extern char *
+nfsstat3_strerror(int stat);
+
+extern void
+nfs3_prep_access3args (access3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_access3res (access3res *res, nfsstat3 status, struct iatt *buf,
+                      uint32_t accbits, uid_t uid, gid_t gid, uint16_t xlid);
+
+extern char *
+nfs3_fhcache_getpath (struct nfs3_state *nfs3, struct nfs3_fh *fh);
+
+extern int
+nfs3_fhcache_putpath (struct nfs3_state *nfs3, struct nfs3_fh *fh, char *path);
+
+extern void
+nfs3_prep_readdir3args (readdir3args *ra, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_readdir3res (readdir3res *res, nfsstat3 stat, uint64_t cverf,
+                       struct iatt *dirstat, gf_dirent_t *entries,count3 count,
+                       int is_eof, uint16_t xlid);
+
+extern void
+nfs3_prep_readdirp3args (readdirp3args *ra, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_readdirp3res (readdirp3res *res, nfsstat3 stat, struct nfs3_fh *dirfh,
+                        uint64_t cverf, struct iatt *dirstat,
+                        gf_dirent_t *entries, count3 dircount, count3 maxcount,
+                        int is_eof);
+
+extern void
+nfs3_free_readdirp3res (readdirp3res *res);
+
+extern void
+nfs3_free_readdir3res (readdir3res *res);
+
+extern void
+nfs3_prep_fsstat3args (fsstat3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_fsstat3res (fsstat3res *res, nfsstat3 stat, struct statvfs *fsbuf,
+                      struct iatt *postbuf, uint16_t xlid);
+
+extern int32_t
+nfs3_sattr3_to_setattr_valid (sattr3 *sattr, struct iatt *buf, mode_t *omode);
+extern void
+nfs3_fill_create3res (create3res *res, nfsstat3 stat, struct nfs3_fh *newfh,
+                      struct iatt *newbuf, struct iatt *preparent,
+                      struct iatt *postparent);
+
+extern void
+nfs3_prep_create3args (create3args *args, struct nfs3_fh *fh, char *name);
+
+extern void
+nfs3_prep_setattr3args (setattr3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_setattr3res (setattr3res *res, nfsstat3 stat, struct iatt *preop,
+                       struct iatt *postop, uint16_t xlid);
+
+extern void
+nfs3_prep_mkdir3args (mkdir3args *args, struct nfs3_fh *dirfh, char *name);
+
+extern void
+nfs3_fill_mkdir3res (mkdir3res *res, nfsstat3 stat, struct nfs3_fh *fh,
+                     struct iatt *buf, struct iatt *preparent,
+                     struct iatt *postparent);
+
+extern void
+nfs3_prep_symlink3args (symlink3args *args, struct nfs3_fh *dirfh, char *name,
+                        char *target);
+
+extern void
+nfs3_fill_symlink3res (symlink3res *res, nfsstat3 stat, struct nfs3_fh *fh,
+                       struct iatt *buf, struct iatt *preparent,
+                       struct iatt *postparent);
+
+extern void
+nfs3_prep_readlink3args (readlink3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_readlink3res (readlink3res *res, nfsstat3 stat, char *path,
+                        struct iatt *buf, uint16_t xlid);
+
+extern void
+nfs3_prep_mknod3args (mknod3args *args, struct nfs3_fh *fh, char *name);
+
+extern void
+nfs3_fill_mknod3res (mknod3res *res, nfsstat3 stat, struct nfs3_fh *fh,
+                     struct iatt *buf, struct iatt *preparent,
+                     struct iatt *postparent);
+
+extern void
+nfs3_fill_remove3res (remove3res *res, nfsstat3 stat, struct iatt *preparent,
+                      struct iatt *postparent, uint16_t xlid);
+extern void
+nfs3_prep_remove3args (remove3args *args, struct nfs3_fh *fh, char *name);
+
+extern void
+nfs3_fill_rmdir3res (rmdir3res *res, nfsstat3 stat, struct iatt *preparent,
+                     struct iatt *postparent, uint16_t xlid);
+
+extern void
+nfs3_prep_rmdir3args (rmdir3args *args, struct nfs3_fh *fh, char *name);
+
+extern void
+nfs3_fill_link3res (link3res *res, nfsstat3 stat, struct iatt *buf,
+                    struct iatt *preparent, struct iatt *postparent,
+                    uint16_t xlid);
+
+extern void
+nfs3_prep_link3args (link3args *args, struct nfs3_fh *target,
+                     struct nfs3_fh * dirfh, char *name);
+
+extern void
+nfs3_prep_rename3args (rename3args *args, struct nfs3_fh *olddirfh,
+                       char *oldname, struct nfs3_fh *newdirfh,
+                       char *newname);
+
+extern void
+nfs3_fill_rename3res (rename3res *res, nfsstat3 stat, struct iatt *buf,
+                      struct iatt *preoldparent, struct iatt *postoldparent,
+                      struct iatt *prenewparent, struct iatt *postnewparent,
+                      uint16_t xlid);
+
+extern void
+nfs3_prep_write3args (write3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_write3res (write3res *res, nfsstat3 stat, count3 count,
+                     stable_how stable, uint64_t wverf, struct iatt *prestat,
+                     struct iatt *poststat, uint16_t xlid);
+
+extern void
+nfs3_prep_commit3args (commit3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_commit3res (commit3res *res, nfsstat3 stat, uint64_t wverf,
+                      struct iatt *prestat, struct iatt *poststat,
+                      uint16_t xlid);
+
+extern void
+nfs3_fill_read3res (read3res *res, nfsstat3 stat, count3 count,
+                    struct iatt *poststat, int is_eof, uint16_t xlid);
+
+extern void
+nfs3_prep_read3args (read3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_prep_pathconf3args (pathconf3args *args, struct nfs3_fh *fh);
+
+extern void
+nfs3_fill_pathconf3res (pathconf3res *res, nfsstat3 stat, struct iatt *buf,
+                        uint16_t xlid);
+
+extern int
+nfs3_cached_inode_opened (xlator_t *nfsxl, inode_t *inode);
+
+extern void
+nfs3_log_common_res (uint32_t xid, char *op, nfsstat3 stat, int pstat);
+
+extern void
+nfs3_log_readlink_res (uint32_t xid, nfsstat3 stat, int pstat, char *linkpath);
+
+extern void
+nfs3_log_read_res (uint32_t xid, nfsstat3 stat, int pstat, count3 count,
+                   int is_eof);
+
+extern void
+nfs3_log_write_res (uint32_t xid, nfsstat3 stat, int pstat, count3 count,
+                    int stable, uint64_t wverf);
+
+extern void
+nfs3_log_newfh_res (uint32_t xid, char *op, nfsstat3 stat, int pstat,
+                    struct nfs3_fh *newfh);
+
+extern void
+nfs3_log_readdir_res (uint32_t xid, nfsstat3 stat, int pstat, uint64_t cverf,
+                      count3 count, int is_eof);
+
+extern void
+nfs3_log_readdirp_res (uint32_t xid, nfsstat3 stat, int pstat, uint64_t cverf,
+                       count3 dircount, count3 maxcount, int is_eof);
+
+extern void
+nfs3_log_commit_res (uint32_t xid, nfsstat3 stat, int pstat, uint64_t wverf);
+
+extern void
+nfs3_log_common_call (uint32_t xid, char *op, struct nfs3_fh *fh);
+
+extern void
+nfs3_log_fh_entry_call (uint32_t xid, char *op, struct nfs3_fh *fh,
+                        char *name);
+
+extern void
+nfs3_log_rw_call (uint32_t xid, char *op, struct nfs3_fh *fh, offset3 offt,
+                  count3 count, int stablewrite);
+
+extern void
+nfs3_log_create_call (uint32_t xid, struct nfs3_fh *fh, char *name,
+                      createmode3 mode);
+
+extern void
+nfs3_log_symlink_call (uint32_t xid, struct nfs3_fh *fh, char *name, char *tgt);
+
+extern void
+nfs3_log_mknod_call (uint32_t xid, struct nfs3_fh *fh, char *name, int type);
+
+extern void
+nfs3_log_rename_call (uint32_t xid, struct nfs3_fh *src, char *sname,
+                      struct nfs3_fh *dst, char *dname);
+
+extern void
+nfs3_log_link_call (uint32_t xid, struct nfs3_fh *fh, char *name,
+                    struct nfs3_fh *tgt);
+
+extern void
+nfs3_log_readdir_call (uint32_t xid, struct nfs3_fh *fh, count3 dircount,
+                       count3 maxcount);
+
+extern int
+nfs3_fh_resolve_entry_hard (nfs3_call_state_t *cs);
+
+extern int
+nfs3_fh_resolve_inode (nfs3_call_state_t *cs);
+
+extern int
+nfs3_fh_resolve_entry (nfs3_call_state_t *cs);
+
+extern int
+nfs3_fh_resolve_and_resume (nfs3_call_state_t *cs, struct nfs3_fh *fh,
+                            char *entry, nfs3_resume_fn_t resum_fn);
+
+extern int
+nfs3_file_open_and_resume (nfs3_call_state_t *cs, nfs3_resume_fn_t resume);
+
+extern int
+nfs3_dir_open_and_resume (nfs3_call_state_t *cs, nfs3_resume_fn_t resume);
+
+extern int
+nfs3_verify_dircookie (struct nfs3_state *nfs3, fd_t *dirfd, cookie3 cookie,
+                       uint64_t cverf, nfsstat3 *stat);
+
+extern int
+nfs3_fdcache_remove (struct nfs3_state *nfs3, fd_t *fd);
+#endif