| ufs_dirhash.c (274835) | ufs_dirhash.c (283735) |
|---|---|
| 1/*- 2 * Copyright (c) 2001, 2002 Ian Dowse. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. --- 14 unchanged lines hidden (view full) --- 23 * SUCH DAMAGE. 24 */ 25 26/* 27 * This implements a hash-based lookup scheme for UFS directories. 28 */ 29 30#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2001, 2002 Ian Dowse. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. --- 14 unchanged lines hidden (view full) --- 23 * SUCH DAMAGE. 24 */ 25 26/* 27 * This implements a hash-based lookup scheme for UFS directories. 28 */ 29 30#include <sys/cdefs.h> |
| 31__FBSDID("$FreeBSD: head/sys/ufs/ufs/ufs_dirhash.c 274835 2014-11-22 00:42:30Z davide $"); | 31__FBSDID("$FreeBSD: head/sys/ufs/ufs/ufs_dirhash.c 283735 2015-05-29 13:24:17Z kib $"); |
| 32 33#include "opt_ufs.h" 34 35#ifdef UFS_DIRHASH 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/kernel.h> --- 145 unchanged lines hidden (view full) --- 185 * simultaneous access while only a shared vnode lock is held. 186 */ 187static struct dirhash * 188ufsdirhash_create(struct inode *ip) 189{ 190 struct dirhash *ndh; 191 struct dirhash *dh; 192 struct vnode *vp; | 32 33#include "opt_ufs.h" 34 35#ifdef UFS_DIRHASH 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/kernel.h> --- 145 unchanged lines hidden (view full) --- 185 * simultaneous access while only a shared vnode lock is held. 186 */ 187static struct dirhash * 188ufsdirhash_create(struct inode *ip) 189{ 190 struct dirhash *ndh; 191 struct dirhash *dh; 192 struct vnode *vp; |
| 193 int error; | |
| 194 | 193 |
| 195 error = 0; | |
| 196 ndh = dh = NULL; 197 vp = ip->i_vnode; 198 for (;;) { 199 /* Racy check for i_dirhash to prefetch a dirhash structure. */ 200 if (ip->i_dirhash == NULL && ndh == NULL) { 201 ndh = malloc(sizeof *dh, M_DIRHASH, 202 M_NOWAIT | M_ZERO); 203 if (ndh == NULL) --- 65 unchanged lines hidden (view full) --- 269 * Acquire an exclusive lock on an existing hash. Requires an exclusive 270 * vnode lock to protect the i_dirhash pointer. hashes that have been 271 * recycled are reclaimed here and NULL is returned. 272 */ 273static struct dirhash * 274ufsdirhash_acquire(struct inode *ip) 275{ 276 struct dirhash *dh; | 194 ndh = dh = NULL; 195 vp = ip->i_vnode; 196 for (;;) { 197 /* Racy check for i_dirhash to prefetch a dirhash structure. */ 198 if (ip->i_dirhash == NULL && ndh == NULL) { 199 ndh = malloc(sizeof *dh, M_DIRHASH, 200 M_NOWAIT | M_ZERO); 201 if (ndh == NULL) --- 65 unchanged lines hidden (view full) --- 267 * Acquire an exclusive lock on an existing hash. Requires an exclusive 268 * vnode lock to protect the i_dirhash pointer. hashes that have been 269 * recycled are reclaimed here and NULL is returned. 270 */ 271static struct dirhash * 272ufsdirhash_acquire(struct inode *ip) 273{ 274 struct dirhash *dh; |
| 277 struct vnode *vp; | |
| 278 279 ASSERT_VOP_ELOCKED(ip->i_vnode, __FUNCTION__); 280 | 275 276 ASSERT_VOP_ELOCKED(ip->i_vnode, __FUNCTION__); 277 |
| 281 vp = ip->i_vnode; | |
| 282 dh = ip->i_dirhash; 283 if (dh == NULL) 284 return (NULL); 285 sx_xlock(&dh->dh_lock); 286 if (dh->dh_hash != NULL) 287 return (dh); 288 ufsdirhash_free_locked(ip); 289 return (NULL); --- 1033 unchanged lines hidden --- | 278 dh = ip->i_dirhash; 279 if (dh == NULL) 280 return (NULL); 281 sx_xlock(&dh->dh_lock); 282 if (dh->dh_hash != NULL) 283 return (dh); 284 ufsdirhash_free_locked(ip); 285 return (NULL); --- 1033 unchanged lines hidden --- |