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subr.c revision 1.2 
      1 /*  $NetBSD: subr.c,v 1.2 2010/08/26 13:29:01 manu Exp $ */
      2 
      3 /*-
      4  *  Copyright (c) 2010 Emmanuel Dreyfus. All rights reserved.
      5  *
      6  *  Redistribution and use in source and binary forms, with or without
      7  *  modification, are permitted provided that the following conditions
      8  *  are met:
      9  *  1. Redistributions of source code must retain the above copyright
     10  *     notice, this list of conditions and the following disclaimer.
     11  *  2. Redistributions in binary form must reproduce the above copyright
     12  *     notice, this list of conditions and the following disclaimer in the
     13  *     documentation and/or other materials provided with the distribution.
     14  *
     15  *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     16  *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     17  *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     19  *  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     20  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     21  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     22  *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     23  *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     24  *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  *  POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <stdio.h>
     29 #include <stdlib.h>
     30 #include <err.h>
     31 #include <errno.h>
     32 #include <sysexits.h>
     33 #include <syslog.h>
     34 #include <puffs.h>
     35 #include <paths.h>
     36 
     37 #include "perfuse_priv.h"
     38 
     39 struct puffs_node *
     40 perfuse_new_pn(pu, parent)
     41 	struct puffs_usermount *pu;
     42 	struct puffs_node *parent;
     43 {
     44 	struct puffs_node *pn;
     45 	struct perfuse_node_data *pnd;
     46 
     47 	if ((pnd = malloc(sizeof(*pnd))) == NULL)
     48 		DERR(EX_OSERR, "malloc failed");
     49 
     50 	if ((pn = puffs_pn_new(pu, pnd)) == NULL)
     51 		DERR(EX_SOFTWARE, "puffs_pn_new failed");
     52 
     53 	(void)memset(pnd, 0, sizeof(*pnd));
     54 	TAILQ_INIT(&pnd->pnd_fh);
     55 	pnd->pnd_ino = PERFUSE_UNKNOWN_INO;
     56 	pnd->pnd_nlookup = 1;
     57 	pnd->pnd_parent = parent;
     58 	TAILQ_INIT(&pnd->pnd_pcq);
     59 
     60 	if (parent != NULL)
     61 		PERFUSE_NODE_DATA(parent)->pnd_childcount++;
     62 
     63 	return pn;
     64 }
     65 
     66 void
     67 perfuse_destroy_pn(pn)
     68 	struct puffs_node *pn;
     69 {
     70 	struct perfuse_node_data *pnd;
     71 
     72 	if ((pnd = puffs_pn_getpriv(pn)) != NULL) {
     73 		if (pnd->pnd_parent != NULL)
     74 			PERFUSE_NODE_DATA(pnd->pnd_parent)->pnd_childcount--;
     75 
     76 		if (pnd->pnd_dirent != NULL)
     77 			free(pnd->pnd_dirent);
     78 
     79 		if (pnd->pnd_all_fd != NULL)
     80 			free(pnd->pnd_all_fd);
     81 #ifdef PERFUSE_DEBUG
     82 		if (!TAILQ_EMPTY(&pnd->pnd_fh))
     83 			DERRX(EX_SOFTWARE, "%s: non empty pnd_fh", __func__);
     84 
     85 		if (!TAILQ_EMPTY(&pnd->pnd_pcq))
     86 			DERRX(EX_SOFTWARE, "%s: non empty pnd_pcq", __func__);
     87 #endif /* PERFUSE_DEBUG */
     88 
     89 		free(pnd);
     90 	}
     91 
     92 	puffs_pn_remove(pn);
     93 
     94 	return;
     95 }
     96 
     97 
     98 void
     99 perfuse_new_fh(opc, fh)
    100 	puffs_cookie_t opc;
    101 	uint64_t fh;
    102 {
    103 	struct perfuse_node_data *pnd;
    104 	struct perfuse_file_handle *pfh;
    105 
    106 	if (fh == FUSE_UNKNOWN_FH)
    107 		return;
    108 
    109 	pnd = PERFUSE_NODE_DATA(opc);
    110 	pnd->pnd_flags |= PND_OPEN;
    111 
    112 	if ((pfh = malloc(sizeof(*pfh))) == NULL)
    113 		DERR(EX_OSERR, "malloc failed");
    114 
    115 	pfh->pfh_fh = fh;
    116 
    117 	TAILQ_INSERT_TAIL(&pnd->pnd_fh, pfh, pfh_entries);
    118 
    119 	return;
    120 }
    121 
    122 void
    123 perfuse_destroy_fh(opc, fh)
    124 	puffs_cookie_t opc;
    125 	uint64_t fh;
    126 {
    127 	struct perfuse_node_data *pnd;
    128 	struct perfuse_file_handle *pfh;
    129 
    130 	pnd = PERFUSE_NODE_DATA(opc);
    131 
    132 	TAILQ_FOREACH(pfh, &pnd->pnd_fh, pfh_entries) {
    133 		if (pfh->pfh_fh == fh) {
    134 			TAILQ_REMOVE(&pnd->pnd_fh, pfh, pfh_entries);
    135 			free(pfh);
    136 			break;
    137 		}
    138 	}
    139 
    140 	if (TAILQ_EMPTY(&pnd->pnd_fh))
    141 		pnd->pnd_flags &= ~PND_OPEN;
    142 
    143 	if (pfh == NULL)
    144 		DERRX(EX_SOFTWARE, "%s: unexistant fh = %lld (double close?)",
    145 		      __func__, fh);
    146 
    147 	return;
    148 }
    149 
    150 uint64_t
    151 perfuse_get_fh(opc)
    152 	puffs_cookie_t opc;
    153 {
    154 	struct perfuse_node_data *pnd;
    155 	struct perfuse_file_handle *pfh;
    156 	uint64_t fh = FUSE_UNKNOWN_FH;
    157 
    158 	pnd = PERFUSE_NODE_DATA(opc);
    159 
    160 	if ((pfh = TAILQ_FIRST(&pnd->pnd_fh)) != NULL)
    161 		fh = pfh->pfh_fh;;
    162 
    163 	return fh;
    164 }
    165 
    166