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/*
Copyright (c) 2010-2011 Gluster, Inc. <http://www.gluster.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _NFS3_HELPER_H_
#define _NFS3_HELPER_H_
#include <glusterfs/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 nfsstat3 nfs3_cbk_errno_status(int32_t, int32_t);
extern void
nfs3_fill_lookup3res(lookup3res *res, nfsstat3 stat, struct nfs3_fh *newfh,
struct iatt *stbuf, struct iatt *postparent,
uint64_t deviceid);
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,
uint64_t deviceid);
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, uint64_t deviceid);
/* 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, int32_t accbits,
int32_t reqaccbits);
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, struct nfs3_fh *dfh,
uint64_t cverf, struct iatt *dirstat,
gf_dirent_t *entries, count3 count, int is_eof,
uint64_t deviceid);
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, uint64_t deviceid);
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, uint64_t deviceid);
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, uint64_t deviceid);
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, uint64_t deviceid);
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, uint64_t deviceid);
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, uint64_t deviceid);
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, uint64_t deviceid);
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, uint64_t deviceid);
extern void
nfs3_fill_remove3res(remove3res *res, nfsstat3 stat, struct iatt *preparent,
struct iatt *postparent, uint64_t deviceid);
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, uint64_t deviceid);
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,
uint64_t deviceid);
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,
uint64_t deviceid);
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, uint64_t deviceid);
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,
uint64_t deviceid);
extern void
nfs3_fill_read3res(read3res *res, nfsstat3 stat, count3 count,
struct iatt *poststat, int is_eof, uint64_t deviceid);
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,
uint64_t deviceid);
extern int
nfs3_cached_inode_opened(xlator_t *nfsxl, inode_t *inode);
extern void
nfs3_log_common_res(uint32_t xid, int op, nfsstat3 stat, int pstat,
const char *path);
extern void
nfs3_log_readlink_res(uint32_t xid, nfsstat3 stat, int pstat, char *linkpath,
const char *path);
extern void
nfs3_log_read_res(uint32_t xid, nfsstat3 stat, int pstat, count3 count,
int is_eof, struct iovec *vec, int32_t vcount,
const char *path);
extern void
nfs3_log_write_res(uint32_t xid, nfsstat3 stat, int pstat, count3 count,
int stable, uint64_t wverf, const char *path);
extern void
nfs3_log_newfh_res(uint32_t xid, int op, nfsstat3 stat, int pstat,
struct nfs3_fh *newfh, const char *path);
extern void
nfs3_log_readdir_res(uint32_t xid, nfsstat3 stat, int pstat, uint64_t cverf,
count3 count, int is_eof, const char *path);
extern void
nfs3_log_readdirp_res(uint32_t xid, nfsstat3 stat, int pstat, uint64_t cverf,
count3 dircount, count3 maxcount, int is_eof,
const char *path);
extern void
nfs3_log_commit_res(uint32_t xid, nfsstat3 stat, int pstat, uint64_t wverf,
const char *path);
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_verify_dircookie(struct nfs3_state *nfs3, fd_t *dirfd, cookie3 cookie,
uint64_t cverf, nfsstat3 *stat);
extern int
nfs3_is_parentdir_entry(char *entry);
uint32_t
nfs3_request_to_accessbits(int32_t accbits);
extern int
nfs3_fh_auth_nfsop(nfs3_call_state_t *cs, gf_boolean_t is_write_op);
void
nfs3_map_deviceid_to_statdev(struct iatt *ia, uint64_t deviceid);
#endif
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