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/*
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 _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "rpcsvc.h"
#include "dict.h"
#include "xlator.h"
#include "xdr-nfs3.h"
#include "msg-nfs3.h"
#include "iobuf.h"
#include "nfs3-fh.h"
#include "nfs-common.h"
#include "iatt.h"
int
nfs3_fh_validate (struct nfs3_fh *fh)
{
if (!fh)
return 0;
if (fh->ident[0] != GF_NFSFH_IDENT0)
return 0;
if (fh->ident[1] != GF_NFSFH_IDENT1)
return 0;
return 1;
}
xlator_t *
nfs3_fh_to_xlator (xlator_list_t *cl, struct nfs3_fh *fh)
{
if ((!cl) || (!fh))
return NULL;
return nfs_xlid_to_xlator (cl, fh->xlatorid);
}
void
nfs3_fh_init (struct nfs3_fh *fh, struct iatt *buf)
{
if ((!fh) || (!buf))
return;
fh->ident[0] = GF_NFSFH_IDENT0;
fh->ident[1] = GF_NFSFH_IDENT1;
fh->hashcount = 0;
fh->gen = buf->ia_gen;
fh->ino = buf->ia_ino;
}
struct nfs3_fh
nfs3_fh_build_root_fh (xlator_list_t *cl, xlator_t *xl, struct iatt buf)
{
struct nfs3_fh fh = {{0}, };
if ((!cl) || (!xl))
return fh;
nfs3_fh_init (&fh, &buf);
fh.xlatorid = nfs_xlator_to_xlid (cl, xl);
fh.ino = 1;
fh.gen = 0;
return fh;
}
int
nfs3_fh_is_root_fh (struct nfs3_fh *fh)
{
if (!fh)
return 0;
if (fh->hashcount == 0)
return 1;
return 0;
}
nfs3_hash_entry_t
nfs3_fh_hash_entry (ino_t ino, uint64_t gen)
{
nfs3_hash_entry_t hash = 0;
int shiftsize = 48;
nfs3_hash_entry_t inomsb = 0;
nfs3_hash_entry_t inolsb = 0;
nfs3_hash_entry_t inols23b = 0;
nfs3_hash_entry_t genmsb = 0;
nfs3_hash_entry_t genlsb = 0;
nfs3_hash_entry_t genls23b = 0;
hash = ino;
while (shiftsize != 0) {
hash ^= (ino >> shiftsize);
shiftsize -= 16;
}
/*
gf_log ("FILEHANDLE", GF_LOG_TRACE, "INO %"PRIu64, ino);
gf_log ("FILEHANDLE",GF_LOG_TRACE, "PRI HASH %d", hash);
*/
inomsb = (ino >> 56);
// gf_log ("FILEHANDLE", GF_LOG_TRACE, "inomsb %d", inomsb);
inolsb = ((ino << 56) >> 56);
// gf_log ("FILEHANDLE", GF_LOG_TRACE, "inolsb %d", inolsb);
inolsb = (inolsb << 8);
// gf_log ("FILEHANDLE", GF_LOG_TRACE, "inolsb to inomsb %d", inolsb);
inols23b = ((ino << 40) >> 48);
// gf_log ("FILEHANDLE", GF_LOG_TRACE, "inols23b %d", inols23b);
inols23b = (inols23b << 8);
// gf_log ("FILEHDNALE", GF_LOG_TRACE, "inols23b %d", inols23b);
genmsb = (gen >> 56);
// gf_log ("FILEHANDLE", GF_LOG_TRACE, "inomsb %d", inomsb);
genlsb = ((gen << 56) >> 56);
// gf_log ("FILEHANDLE", GF_LOG_TRACE, "inolsb %d", inolsb);
genlsb = (genlsb << 8);
// gf_log ("FILEHANDLE", GF_LOG_TRACE, "inolsb to inomsb %d", inolsb);
genls23b = ((gen << 40) >> 48);
// gf_log ("FILEHANDLE", GF_LOG_TRACE, "inols23b %d", inols23b);
genls23b = (genls23b << 8);
// gf_log ("FILEHDNALE", GF_LOG_TRACE, "inols23b %d", inols23b);
hash ^= inolsb ^ inomsb ^ inols23b ^ genmsb ^ genlsb ^ genls23b;
return hash;
}
void
nfs3_fh_to_str (struct nfs3_fh *fh, char *str)
{
if ((!fh) || (!str))
return;
sprintf (str, "FH: hashcount %d, xlid %d, gen %"PRIu64", ino %"PRIu64,
fh->hashcount, fh->xlatorid, fh->gen, fh->ino);
}
void
nfs3_log_fh (struct nfs3_fh *fh)
{
// int x = 0;
if (!fh)
return;
gf_log ("nfs3-fh", GF_LOG_TRACE, "filehandle: hashcount %d, xlid %d, "
"gen %"PRIu64", ino %"PRIu64, fh->hashcount, fh->xlatorid,
fh->gen, fh->ino);
/*
for (; x < fh->hashcount; ++x)
gf_log ("FILEHANDLE", GF_LOG_TRACE, "Hash %d: %d", x,
fh->entryhash[x]);
*/
}
int
nfs3_fh_build_parent_fh (struct nfs3_fh *child, struct iatt *newstat,
struct nfs3_fh *newfh)
{
if ((!child) || (!newstat) || (!newfh))
return -1;
nfs3_fh_init (newfh, newstat);
newfh->xlatorid = child->xlatorid;
if ((newstat->ia_ino == 1) && (newstat->ia_gen == 0)) {
newfh->ino = 1;
newfh->gen = 0;
goto done;
}
newfh->hashcount = child->hashcount - 1;
memcpy (newfh->entryhash, child->entryhash,
newfh->hashcount * GF_NFSFH_ENTRYHASH_SIZE);
done:
// nfs3_log_fh (newfh);
return 0;
}
int
nfs3_fh_build_child_fh (struct nfs3_fh *parent, struct iatt *newstat,
struct nfs3_fh *newfh)
{
int entry = 0;
if ((!parent) || (!newstat) || (!newfh))
return -1;
nfs3_fh_init (newfh, newstat);
newfh->xlatorid = parent->xlatorid;
if ((newstat->ia_ino == 1) && (newstat->ia_gen == 0)) {
newfh->ino = 1;
newfh->gen = 0;
goto done;
}
newfh->hashcount = parent->hashcount + 1;
memcpy (newfh->entryhash, parent->entryhash,
parent->hashcount * GF_NFSFH_ENTRYHASH_SIZE);
entry = newfh->hashcount - 1;
newfh->entryhash[entry] = nfs3_fh_hash_entry (parent->ino, parent->gen);
done:
// nfs3_log_fh (newfh);
return 0;
}
uint32_t
nfs3_fh_compute_size (struct nfs3_fh *fh)
{
if (!fh)
return 0;
return (GF_NFSFH_STATIC_SIZE +
(fh->hashcount * GF_NFSFH_ENTRYHASH_SIZE));
}
int
nfs3_fh_hash_index_is_beyond (struct nfs3_fh *fh, int hashidx)
{
if (!fh)
return 1;
if (fh->hashcount >= hashidx)
return 0;
else
return 1;
return 1;
}
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