pseudofs_fileno.c (168637) | pseudofs_fileno.c (168720) |
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1/*- 2 * Copyright (c) 2001 Dag-Erling Co�dan Sm�rgrav 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2001 Dag-Erling Co�dan Sm�rgrav 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> |
30__FBSDID("$FreeBSD: head/sys/fs/pseudofs/pseudofs_fileno.c 168637 2007-04-11 22:40:57Z des $"); | 30__FBSDID("$FreeBSD: head/sys/fs/pseudofs/pseudofs_fileno.c 168720 2007-04-14 14:08:30Z des $"); |
31 32#include "opt_pseudofs.h" 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/systm.h> 37#include <sys/limits.h> 38#include <sys/lock.h> 39#include <sys/malloc.h> 40#include <sys/mutex.h> | 31 32#include "opt_pseudofs.h" 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/systm.h> 37#include <sys/limits.h> 38#include <sys/lock.h> 39#include <sys/malloc.h> 40#include <sys/mutex.h> |
41#include <sys/proc.h> |
|
41#include <sys/sysctl.h> 42#include <sys/systm.h> 43 44#include <fs/pseudofs/pseudofs.h> 45#include <fs/pseudofs/pseudofs_internal.h> 46 47/* 48 * Initialize fileno bitmap 49 */ 50void 51pfs_fileno_init(struct pfs_info *pi) 52{ | 42#include <sys/sysctl.h> 43#include <sys/systm.h> 44 45#include <fs/pseudofs/pseudofs.h> 46#include <fs/pseudofs/pseudofs_internal.h> 47 48/* 49 * Initialize fileno bitmap 50 */ 51void 52pfs_fileno_init(struct pfs_info *pi) 53{ |
53 struct unrhdr *up; | |
54 | 54 |
55 up = new_unrhdr(3, INT_MAX, &pi->pi_mutex); 56 mtx_lock(&pi->pi_mutex); 57 pi->pi_unrhdr = up; 58 mtx_unlock(&pi->pi_mutex); | 55 mtx_assert(&Giant, MA_OWNED); 56 mtx_init(&pi->pi_mutex, "pfs_fileno", NULL, MTX_DEF); 57 pi->pi_unrhdr = new_unrhdr(3, INT_MAX / NO_PID, &pi->pi_mutex); |
59} 60 61/* 62 * Tear down fileno bitmap 63 */ 64void 65pfs_fileno_uninit(struct pfs_info *pi) 66{ | 58} 59 60/* 61 * Tear down fileno bitmap 62 */ 63void 64pfs_fileno_uninit(struct pfs_info *pi) 65{ |
67 struct unrhdr *up; | |
68 | 66 |
69 mtx_lock(&pi->pi_mutex); 70 71 up = pi->pi_unrhdr; | 67 mtx_assert(&Giant, MA_OWNED); 68 delete_unrhdr(pi->pi_unrhdr); |
72 pi->pi_unrhdr = NULL; | 69 pi->pi_unrhdr = NULL; |
73 74 mtx_unlock(&pi->pi_mutex); 75 76 delete_unrhdr(up); | 70 mtx_destroy(&pi->pi_mutex); |
77} 78 79/* 80 * Allocate a file number 81 */ 82void | 71} 72 73/* 74 * Allocate a file number 75 */ 76void |
83pfs_fileno_alloc(struct pfs_info *pi, struct pfs_node *pn) | 77pfs_fileno_alloc(struct pfs_node *pn) |
84{ | 78{ |
85 /* pi is not really necessary as it can be derived */ 86 KASSERT(pi == pn->pn_info, ("pn / pi mismatch")); | |
87 88 /* make sure our parent has a file number */ 89 if (pn->pn_parent && !pn->pn_parent->pn_fileno) | 79 80 /* make sure our parent has a file number */ 81 if (pn->pn_parent && !pn->pn_parent->pn_fileno) |
90 pfs_fileno_alloc(pi, pn->pn_parent); | 82 pfs_fileno_alloc(pn->pn_parent); |
91 92 switch (pn->pn_type) { 93 case pfstype_root: 94 /* root must always be 2 */ 95 pn->pn_fileno = 2; 96 break; 97 case pfstype_dir: 98 case pfstype_file: 99 case pfstype_symlink: 100 case pfstype_procdir: | 83 84 switch (pn->pn_type) { 85 case pfstype_root: 86 /* root must always be 2 */ 87 pn->pn_fileno = 2; 88 break; 89 case pfstype_dir: 90 case pfstype_file: 91 case pfstype_symlink: 92 case pfstype_procdir: |
101 pn->pn_fileno = alloc_unr(pi->pi_unrhdr); | 93 pn->pn_fileno = alloc_unr(pn->pn_info->pi_unrhdr); |
102 break; 103 case pfstype_this: 104 KASSERT(pn->pn_parent != NULL, 105 ("pfstype_this node has no parent")); 106 pn->pn_fileno = pn->pn_parent->pn_fileno; 107 break; 108 case pfstype_parent: 109 KASSERT(pn->pn_parent != NULL, 110 ("pfstype_parent node has no parent")); | 94 break; 95 case pfstype_this: 96 KASSERT(pn->pn_parent != NULL, 97 ("pfstype_this node has no parent")); 98 pn->pn_fileno = pn->pn_parent->pn_fileno; 99 break; 100 case pfstype_parent: 101 KASSERT(pn->pn_parent != NULL, 102 ("pfstype_parent node has no parent")); |
111 if (pn->pn_parent == pi->pi_root) { | 103 if (pn->pn_parent == pn->pn_info->pi_root) { |
112 pn->pn_fileno = pn->pn_parent->pn_fileno; 113 break; 114 } 115 KASSERT(pn->pn_parent->pn_parent != NULL, 116 ("pfstype_parent node has no grandparent")); 117 pn->pn_fileno = pn->pn_parent->pn_parent->pn_fileno; 118 break; 119 case pfstype_none: 120 KASSERT(0, 121 ("pfs_fileno_alloc() called for pfstype_none node")); 122 break; 123 } 124 125#if 0 | 104 pn->pn_fileno = pn->pn_parent->pn_fileno; 105 break; 106 } 107 KASSERT(pn->pn_parent->pn_parent != NULL, 108 ("pfstype_parent node has no grandparent")); 109 pn->pn_fileno = pn->pn_parent->pn_parent->pn_fileno; 110 break; 111 case pfstype_none: 112 KASSERT(0, 113 ("pfs_fileno_alloc() called for pfstype_none node")); 114 break; 115 } 116 117#if 0 |
126 printf("pfs_fileno_alloc(): %s: ", pi->pi_name); | 118 printf("pfs_fileno_alloc(): %s: ", pn->pn_info->pi_name); |
127 if (pn->pn_parent) { 128 if (pn->pn_parent->pn_parent) { 129 printf("%s/", pn->pn_parent->pn_parent->pn_name); 130 } 131 printf("%s/", pn->pn_parent->pn_name); 132 } 133 printf("%s -> %d\n", pn->pn_name, pn->pn_fileno); 134#endif 135} 136 137/* 138 * Release a file number 139 */ 140void | 119 if (pn->pn_parent) { 120 if (pn->pn_parent->pn_parent) { 121 printf("%s/", pn->pn_parent->pn_parent->pn_name); 122 } 123 printf("%s/", pn->pn_parent->pn_name); 124 } 125 printf("%s -> %d\n", pn->pn_name, pn->pn_fileno); 126#endif 127} 128 129/* 130 * Release a file number 131 */ 132void |
141pfs_fileno_free(struct pfs_info *pi, struct pfs_node *pn) | 133pfs_fileno_free(struct pfs_node *pn) |
142{ | 134{ |
143 /* pi is not really necessary as it can be derived */ 144 KASSERT(pi == pn->pn_info, ("pn / pi mismatch")); | |
145 146 switch (pn->pn_type) { 147 case pfstype_root: 148 /* not allocated from unrhdr */ 149 return; 150 case pfstype_dir: 151 case pfstype_file: 152 case pfstype_symlink: 153 case pfstype_procdir: | 135 136 switch (pn->pn_type) { 137 case pfstype_root: 138 /* not allocated from unrhdr */ 139 return; 140 case pfstype_dir: 141 case pfstype_file: 142 case pfstype_symlink: 143 case pfstype_procdir: |
154 free_unr(pi->pi_unrhdr, pn->pn_fileno); | 144 free_unr(pn->pn_info->pi_unrhdr, pn->pn_fileno); |
155 break; 156 case pfstype_this: 157 case pfstype_parent: 158 /* ignore these, as they don't "own" their file number */ 159 break; 160 case pfstype_none: 161 KASSERT(0, 162 ("pfs_fileno_free() called for pfstype_none node")); 163 break; 164 } 165} | 145 break; 146 case pfstype_this: 147 case pfstype_parent: 148 /* ignore these, as they don't "own" their file number */ 149 break; 150 case pfstype_none: 151 KASSERT(0, 152 ("pfs_fileno_free() called for pfstype_none node")); 153 break; 154 } 155} |