version 1.6, 2005/11/02 12:39:14 |
version 1.27.4.1, 2009/03/03 18:34:40 |
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* $FreeBSD: src/sys/ufs/ufs/ufs_dirhash.c,v 1.3.2.8 2004/12/08 11:54:13 dwmalone Exp $ |
* $FreeBSD: src/sys/ufs/ufs/ufs_dirhash.c,v 1.3.2.8 2004/12/08 11:54:13 dwmalone Exp $ |
*/ |
*/ |
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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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/* |
/* |
* This implements a hash-based lookup scheme for UFS directories. |
* This implements a hash-based lookup scheme for UFS directories. |
*/ |
*/ |
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#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/systm.h> |
#include <sys/systm.h> |
#include <sys/kernel.h> |
#include <sys/kernel.h> |
#include <sys/malloc.h> |
#include <sys/kmem.h> |
#include <sys/types.h> |
#include <sys/types.h> |
#include <sys/hash.h> |
#include <sys/hash.h> |
#include <sys/proc.h> |
#include <sys/proc.h> |
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#include <sys/mount.h> |
#include <sys/mount.h> |
#include <sys/pool.h> |
#include <sys/pool.h> |
#include <sys/sysctl.h> |
#include <sys/sysctl.h> |
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#include <sys/atomic.h> |
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#include <ufs/ufs/quota.h> |
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#include <ufs/ufs/inode.h> |
#include <ufs/ufs/inode.h> |
#include <ufs/ufs/dir.h> |
#include <ufs/ufs/dir.h> |
#include <ufs/ufs/dirhash.h> |
#include <ufs/ufs/dirhash.h> |
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#define OFSFMT(ip) ((ip)->i_ump->um_maxsymlinklen <= 0) |
#define OFSFMT(ip) ((ip)->i_ump->um_maxsymlinklen <= 0) |
#define BLKFREE2IDX(n) ((n) > DH_NFSTATS ? DH_NFSTATS : (n)) |
#define BLKFREE2IDX(n) ((n) > DH_NFSTATS ? DH_NFSTATS : (n)) |
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static MALLOC_DEFINE(M_DIRHASH, "UFS dirhash", "UFS directory hash tables"); |
static u_int ufs_dirhashminblks = 5; |
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static u_int ufs_dirhashmaxmem = 2 * 1024 * 1024; |
static int ufs_dirhashminblks = 5; |
static u_int ufs_dirhashmem; |
static int ufs_dirhashmaxmem = 2 * 1024 * 1024; |
static u_int ufs_dirhashcheck = 0; |
static int ufs_dirhashmem; |
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static int ufs_dirhashcheck = 0; |
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static int ufsdirhash_hash(struct dirhash *dh, const char *name, int namelen); |
static int ufsdirhash_hash(struct dirhash *dh, const char *name, int namelen); |
static void ufsdirhash_adjfree(struct dirhash *dh, doff_t offset, int diff, |
static void ufsdirhash_adjfree(struct dirhash *dh, doff_t offset, int diff, |
Line 74 static doff_t ufsdirhash_getprev(struct |
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Line 75 static doff_t ufsdirhash_getprev(struct |
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int dirblksiz); |
int dirblksiz); |
static int ufsdirhash_recycle(int wanted); |
static int ufsdirhash_recycle(int wanted); |
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POOL_INIT(ufsdirhash_pool, DH_NBLKOFF * sizeof(daddr_t), 0, 0, 0, "ufsdirhash", |
static pool_cache_t ufsdirhashblk_cache; |
&pool_allocator_nointr); |
static pool_cache_t ufsdirhash_cache; |
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#define DIRHASHLIST_LOCK() do { } while (0) |
#define DIRHASHLIST_LOCK() mutex_enter(&ufsdirhash_lock) |
#define DIRHASHLIST_UNLOCK() do { } while (0) |
#define DIRHASHLIST_UNLOCK() mutex_exit(&ufsdirhash_lock) |
#define DIRHASH_LOCK(dh) do { } while (0) |
#define DIRHASH_LOCK(dh) mutex_enter(&(dh)->dh_lock) |
#define DIRHASH_UNLOCK(dh) do { } while (0) |
#define DIRHASH_UNLOCK(dh) mutex_exit(&(dh)->dh_lock) |
#define DIRHASH_BLKALLOC_WAITOK() pool_get(&ufsdirhash_pool, PR_WAITOK) |
#define DIRHASH_BLKALLOC() \ |
#define DIRHASH_BLKFREE(ptr) pool_put(&ufsdirhash_pool, ptr) |
pool_cache_get(ufsdirhashblk_cache, PR_NOWAIT) |
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#define DIRHASH_BLKFREE(ptr) \ |
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pool_cache_put(ufsdirhashblk_cache, ptr) |
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/* Dirhash list; recently-used entries are near the tail. */ |
/* Dirhash list; recently-used entries are near the tail. */ |
static TAILQ_HEAD(, dirhash) ufsdirhash_list; |
static TAILQ_HEAD(, dirhash) ufsdirhash_list; |
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/* Protects: ufsdirhash_list, `dh_list' field, ufs_dirhashmem. */ |
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static kmutex_t ufsdirhash_lock; |
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static struct sysctllog *ufsdirhash_sysctl_log; |
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/* |
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* Locking order: |
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* ufsdirhash_lock |
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* dh_lock |
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* |
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* The dh_lock mutex should be acquired either via the inode lock, or via |
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* ufsdirhash_lock. Only the owner of the inode may free the associated |
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* dirhash, but anything can steal its memory and set dh_hash to NULL. |
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*/ |
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/* |
/* |
* Attempt to build up a hash table for the directory contents in |
* Attempt to build up a hash table for the directory contents in |
* inode 'ip'. Returns 0 on success, or -1 of the operation failed. |
* inode 'ip'. Returns 0 on success, or -1 of the operation failed. |
Line 122 ufsdirhash_build(struct inode *ip) |
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Line 140 ufsdirhash_build(struct inode *ip) |
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} |
} |
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/* Don't hash removed directories. */ |
/* Don't hash removed directories. */ |
if (ip->i_ffs_effnlink == 0) |
if (ip->i_nlink == 0) |
return (-1); |
return (-1); |
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vp = ip->i_vnode; |
vp = ip->i_vnode; |
Line 138 ufsdirhash_build(struct inode *ip) |
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Line 156 ufsdirhash_build(struct inode *ip) |
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memreqd = sizeof(*dh) + narrays * sizeof(*dh->dh_hash) + |
memreqd = sizeof(*dh) + narrays * sizeof(*dh->dh_hash) + |
narrays * DH_NBLKOFF * sizeof(**dh->dh_hash) + |
narrays * DH_NBLKOFF * sizeof(**dh->dh_hash) + |
nblocks * sizeof(*dh->dh_blkfree); |
nblocks * sizeof(*dh->dh_blkfree); |
DIRHASHLIST_LOCK(); |
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if (memreqd + ufs_dirhashmem > ufs_dirhashmaxmem) { |
while (atomic_add_int_nv(&ufs_dirhashmem, memreqd) > |
DIRHASHLIST_UNLOCK(); |
ufs_dirhashmaxmem) { |
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atomic_add_int(&ufs_dirhashmem, -memreqd); |
if (memreqd > ufs_dirhashmaxmem / 2) |
if (memreqd > ufs_dirhashmaxmem / 2) |
return (-1); |
return (-1); |
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/* Try to free some space. */ |
/* Try to free some space. */ |
if (ufsdirhash_recycle(memreqd) != 0) |
if (ufsdirhash_recycle(memreqd) != 0) |
return (-1); |
return (-1); |
/* Enough was freed, and list has been locked. */ |
else |
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DIRHASHLIST_UNLOCK(); |
} |
} |
ufs_dirhashmem += memreqd; |
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DIRHASHLIST_UNLOCK(); |
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/* |
/* |
* Use non-blocking mallocs so that we will revert to a linear |
* Use non-blocking mallocs so that we will revert to a linear |
* lookup on failure rather than potentially blocking forever. |
* lookup on failure rather than potentially blocking forever. |
*/ |
*/ |
MALLOC(dh, struct dirhash *, sizeof *dh, M_DIRHASH, M_NOWAIT | M_ZERO); |
dh = pool_cache_get(ufsdirhash_cache, PR_NOWAIT); |
if (dh == NULL) { |
if (dh == NULL) { |
DIRHASHLIST_LOCK(); |
atomic_add_int(&ufs_dirhashmem, -memreqd); |
ufs_dirhashmem -= memreqd; |
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DIRHASHLIST_UNLOCK(); |
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return (-1); |
return (-1); |
} |
} |
MALLOC(dh->dh_hash, doff_t **, narrays * sizeof(dh->dh_hash[0]), |
memset(dh, 0, sizeof(*dh)); |
M_DIRHASH, M_NOWAIT | M_ZERO); |
mutex_init(&dh->dh_lock, MUTEX_DEFAULT, IPL_NONE); |
MALLOC(dh->dh_blkfree, u_int8_t *, nblocks * sizeof(dh->dh_blkfree[0]), |
DIRHASH_LOCK(dh); |
M_DIRHASH, M_NOWAIT); |
dh->dh_hashsz = narrays * sizeof(dh->dh_hash[0]); |
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dh->dh_hash = kmem_zalloc(dh->dh_hashsz, KM_NOSLEEP); |
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dh->dh_blkfreesz = nblocks * sizeof(dh->dh_blkfree[0]); |
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dh->dh_blkfree = kmem_zalloc(dh->dh_blkfreesz, KM_NOSLEEP); |
if (dh->dh_hash == NULL || dh->dh_blkfree == NULL) |
if (dh->dh_hash == NULL || dh->dh_blkfree == NULL) |
goto fail; |
goto fail; |
for (i = 0; i < narrays; i++) { |
for (i = 0; i < narrays; i++) { |
if ((dh->dh_hash[i] = DIRHASH_BLKALLOC_WAITOK()) == NULL) |
if ((dh->dh_hash[i] = DIRHASH_BLKALLOC()) == NULL) |
goto fail; |
goto fail; |
for (j = 0; j < DH_NBLKOFF; j++) |
for (j = 0; j < DH_NBLKOFF; j++) |
dh->dh_hash[i][j] = DIRHASH_EMPTY; |
dh->dh_hash[i][j] = DIRHASH_EMPTY; |
Line 194 ufsdirhash_build(struct inode *ip) |
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Line 212 ufsdirhash_build(struct inode *ip) |
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bmask = VFSTOUFS(vp->v_mount)->um_mountp->mnt_stat.f_iosize - 1; |
bmask = VFSTOUFS(vp->v_mount)->um_mountp->mnt_stat.f_iosize - 1; |
pos = 0; |
pos = 0; |
while (pos < ip->i_size) { |
while (pos < ip->i_size) { |
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if ((curcpu()->ci_schedstate.spc_flags & SPCF_SHOULDYIELD) |
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!= 0) { |
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preempt(); |
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} |
/* If necessary, get the next directory block. */ |
/* If necessary, get the next directory block. */ |
if ((pos & bmask) == 0) { |
if ((pos & bmask) == 0) { |
if (bp != NULL) |
if (bp != NULL) |
brelse(bp); |
brelse(bp, 0); |
if (UFS_BLKATOFF(vp, (off_t)pos, NULL, &bp) != 0) |
if (ufs_blkatoff(vp, (off_t)pos, NULL, &bp, false) != 0) |
goto fail; |
goto fail; |
} |
} |
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Line 207 ufsdirhash_build(struct inode *ip) |
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Line 229 ufsdirhash_build(struct inode *ip) |
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if (ep->d_reclen == 0 || ep->d_reclen > |
if (ep->d_reclen == 0 || ep->d_reclen > |
dirblksiz - (pos & (dirblksiz - 1))) { |
dirblksiz - (pos & (dirblksiz - 1))) { |
/* Corrupted directory. */ |
/* Corrupted directory. */ |
brelse(bp); |
brelse(bp, 0); |
goto fail; |
goto fail; |
} |
} |
if (ep->d_ino != 0) { |
if (ep->d_ino != 0) { |
Line 224 ufsdirhash_build(struct inode *ip) |
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Line 246 ufsdirhash_build(struct inode *ip) |
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} |
} |
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if (bp != NULL) |
if (bp != NULL) |
brelse(bp); |
brelse(bp, 0); |
DIRHASHLIST_LOCK(); |
DIRHASHLIST_LOCK(); |
TAILQ_INSERT_TAIL(&ufsdirhash_list, dh, dh_list); |
TAILQ_INSERT_TAIL(&ufsdirhash_list, dh, dh_list); |
dh->dh_onlist = 1; |
dh->dh_onlist = 1; |
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DIRHASH_UNLOCK(dh); |
DIRHASHLIST_UNLOCK(); |
DIRHASHLIST_UNLOCK(); |
return (0); |
return (0); |
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fail: |
fail: |
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DIRHASH_UNLOCK(dh); |
if (dh->dh_hash != NULL) { |
if (dh->dh_hash != NULL) { |
for (i = 0; i < narrays; i++) |
for (i = 0; i < narrays; i++) |
if (dh->dh_hash[i] != NULL) |
if (dh->dh_hash[i] != NULL) |
DIRHASH_BLKFREE(dh->dh_hash[i]); |
DIRHASH_BLKFREE(dh->dh_hash[i]); |
FREE(dh->dh_hash, M_DIRHASH); |
kmem_free(dh->dh_hash, dh->dh_hashsz); |
} |
} |
if (dh->dh_blkfree != NULL) |
if (dh->dh_blkfree != NULL) |
FREE(dh->dh_blkfree, M_DIRHASH); |
kmem_free(dh->dh_blkfree, dh->dh_blkfreesz); |
FREE(dh, M_DIRHASH); |
mutex_destroy(&dh->dh_lock); |
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pool_cache_put(ufsdirhash_cache, dh); |
ip->i_dirhash = NULL; |
ip->i_dirhash = NULL; |
DIRHASHLIST_LOCK(); |
atomic_add_int(&ufs_dirhashmem, -memreqd); |
ufs_dirhashmem -= memreqd; |
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DIRHASHLIST_UNLOCK(); |
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return (-1); |
return (-1); |
} |
} |
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Line 259 ufsdirhash_free(struct inode *ip) |
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Line 282 ufsdirhash_free(struct inode *ip) |
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if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return; |
return; |
DIRHASHLIST_LOCK(); |
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DIRHASH_LOCK(dh); |
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if (dh->dh_onlist) |
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TAILQ_REMOVE(&ufsdirhash_list, dh, dh_list); |
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DIRHASH_UNLOCK(dh); |
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DIRHASHLIST_UNLOCK(); |
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/* The dirhash pointed to by 'dh' is exclusively ours now. */ |
if (dh->dh_onlist) { |
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DIRHASHLIST_LOCK(); |
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if (dh->dh_onlist) |
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TAILQ_REMOVE(&ufsdirhash_list, dh, dh_list); |
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DIRHASHLIST_UNLOCK(); |
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} |
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/* The dirhash pointed to by 'dh' is exclusively ours now. */ |
mem = sizeof(*dh); |
mem = sizeof(*dh); |
if (dh->dh_hash != NULL) { |
if (dh->dh_hash != NULL) { |
for (i = 0; i < dh->dh_narrays; i++) |
for (i = 0; i < dh->dh_narrays; i++) |
DIRHASH_BLKFREE(dh->dh_hash[i]); |
DIRHASH_BLKFREE(dh->dh_hash[i]); |
FREE(dh->dh_hash, M_DIRHASH); |
kmem_free(dh->dh_hash, dh->dh_hashsz); |
FREE(dh->dh_blkfree, M_DIRHASH); |
kmem_free(dh->dh_blkfree, dh->dh_blkfreesz); |
mem += dh->dh_narrays * sizeof(*dh->dh_hash) + |
mem += dh->dh_hashsz; |
dh->dh_narrays * DH_NBLKOFF * sizeof(**dh->dh_hash) + |
mem += dh->dh_narrays * DH_NBLKOFF * sizeof(**dh->dh_hash); |
dh->dh_nblk * sizeof(*dh->dh_blkfree); |
mem += dh->dh_nblk * sizeof(*dh->dh_blkfree); |
} |
} |
FREE(dh, M_DIRHASH); |
mutex_destroy(&dh->dh_lock); |
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pool_cache_put(ufsdirhash_cache, dh); |
ip->i_dirhash = NULL; |
ip->i_dirhash = NULL; |
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DIRHASHLIST_LOCK(); |
atomic_add_int(&ufs_dirhashmem, -mem); |
ufs_dirhashmem -= mem; |
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DIRHASHLIST_UNLOCK(); |
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} |
} |
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/* |
/* |
Line 312 ufsdirhash_lookup(struct inode *ip, cons |
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Line 334 ufsdirhash_lookup(struct inode *ip, cons |
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if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return (EJUSTRETURN); |
return (EJUSTRETURN); |
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/* |
/* |
* Move this dirhash towards the end of the list if it has a |
* Move this dirhash towards the end of the list if it has a |
* score higher than the next entry, and acquire the dh_mtx. |
* score higher than the next entry, and acquire the dh_lock. |
* Optimise the case where it's already the last by performing |
* Optimise the case where it's already the last by performing |
* an unlocked read of the TAILQ_NEXT pointer. |
* an unlocked read of the TAILQ_NEXT pointer. |
* |
* |
* In both cases, end up holding just dh_mtx. |
* In both cases, end up holding just dh_lock. |
*/ |
*/ |
if (TAILQ_NEXT(dh, dh_list) != NULL) { |
if (TAILQ_NEXT(dh, dh_list) != NULL) { |
DIRHASHLIST_LOCK(); |
DIRHASHLIST_LOCK(); |
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slot = WRAPINCR(slot, dh->dh_hlen)) { |
slot = WRAPINCR(slot, dh->dh_hlen)) { |
if (offset == DIRHASH_DEL) |
if (offset == DIRHASH_DEL) |
continue; |
continue; |
DIRHASH_UNLOCK(dh); |
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if (offset < 0 || offset >= ip->i_size) |
if (offset < 0 || offset >= ip->i_size) |
panic("ufsdirhash_lookup: bad offset in hash array"); |
panic("ufsdirhash_lookup: bad offset in hash array"); |
if ((offset & ~bmask) != blkoff) { |
if ((offset & ~bmask) != blkoff) { |
if (bp != NULL) |
if (bp != NULL) |
brelse(bp); |
brelse(bp, 0); |
blkoff = offset & ~bmask; |
blkoff = offset & ~bmask; |
if (UFS_BLKATOFF(vp, (off_t)blkoff, NULL, &bp) != 0) |
if (ufs_blkatoff(vp, (off_t)blkoff, |
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NULL, &bp, true) != 0) { |
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DIRHASH_UNLOCK(dh); |
return (EJUSTRETURN); |
return (EJUSTRETURN); |
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} |
} |
} |
dp = (struct direct *)(bp->b_data + (offset & bmask)); |
dp = (struct direct *)((char *)bp->b_data + (offset & bmask)); |
if (dp->d_reclen == 0 || dp->d_reclen > |
if (dp->d_reclen == 0 || dp->d_reclen > |
dirblksiz - (offset & (dirblksiz - 1))) { |
dirblksiz - (offset & (dirblksiz - 1))) { |
/* Corrupted directory. */ |
/* Corrupted directory. */ |
brelse(bp); |
DIRHASH_UNLOCK(dh); |
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brelse(bp, 0); |
return (EJUSTRETURN); |
return (EJUSTRETURN); |
} |
} |
if (dp->d_namlen == namelen && |
if (dp->d_namlen == namelen && |
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prevoff = ufsdirhash_getprev(dp, |
prevoff = ufsdirhash_getprev(dp, |
offset, dirblksiz); |
offset, dirblksiz); |
if (prevoff == -1) { |
if (prevoff == -1) { |
brelse(bp); |
brelse(bp, 0); |
return (EJUSTRETURN); |
return (EJUSTRETURN); |
} |
} |
} else |
} else |
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if (dh->dh_seqopt == 0 && dh->dh_seqoff == offset) |
if (dh->dh_seqopt == 0 && dh->dh_seqoff == offset) |
dh->dh_seqopt = 1; |
dh->dh_seqopt = 1; |
dh->dh_seqoff = offset + DIRSIZ(0, dp, needswap); |
dh->dh_seqoff = offset + DIRSIZ(0, dp, needswap); |
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DIRHASH_UNLOCK(dh); |
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*bpp = bp; |
*bpp = bp; |
*offp = offset; |
*offp = offset; |
return (0); |
return (0); |
} |
} |
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DIRHASH_LOCK(dh); |
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if (dh->dh_hash == NULL) { |
if (dh->dh_hash == NULL) { |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
if (bp != NULL) |
if (bp != NULL) |
brelse(bp); |
brelse(bp, 0); |
ufsdirhash_free(ip); |
ufsdirhash_free(ip); |
return (EJUSTRETURN); |
return (EJUSTRETURN); |
} |
} |
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} |
} |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
if (bp != NULL) |
if (bp != NULL) |
brelse(bp); |
brelse(bp, 0); |
return (ENOENT); |
return (ENOENT); |
} |
} |
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Line 481 ufsdirhash_findfree(struct inode *ip, in |
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Line 507 ufsdirhash_findfree(struct inode *ip, in |
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if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return (-1); |
return (-1); |
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DIRHASH_LOCK(dh); |
DIRHASH_LOCK(dh); |
if (dh->dh_hash == NULL) { |
if (dh->dh_hash == NULL) { |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
Line 500 ufsdirhash_findfree(struct inode *ip, in |
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Line 527 ufsdirhash_findfree(struct inode *ip, in |
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KASSERT(dirblock < dh->dh_nblk && |
KASSERT(dirblock < dh->dh_nblk && |
dh->dh_blkfree[dirblock] >= howmany(slotneeded, DIRALIGN)); |
dh->dh_blkfree[dirblock] >= howmany(slotneeded, DIRALIGN)); |
DIRHASH_UNLOCK(dh); |
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pos = dirblock * dirblksiz; |
pos = dirblock * dirblksiz; |
error = UFS_BLKATOFF(ip->i_vnode, (off_t)pos, (void *)&dp, &bp); |
error = ufs_blkatoff(ip->i_vnode, (off_t)pos, (void *)&dp, &bp, false); |
if (error) |
if (error) { |
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DIRHASH_UNLOCK(dh); |
return (-1); |
return (-1); |
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} |
/* Find the first entry with free space. */ |
/* Find the first entry with free space. */ |
for (i = 0; i < dirblksiz; ) { |
for (i = 0; i < dirblksiz; ) { |
if (dp->d_reclen == 0) { |
if (dp->d_reclen == 0) { |
brelse(bp); |
DIRHASH_UNLOCK(dh); |
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brelse(bp, 0); |
return (-1); |
return (-1); |
} |
} |
if (dp->d_ino == 0 || dp->d_reclen > DIRSIZ(0, dp, needswap)) |
if (dp->d_ino == 0 || dp->d_reclen > DIRSIZ(0, dp, needswap)) |
Line 517 ufsdirhash_findfree(struct inode *ip, in |
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Line 546 ufsdirhash_findfree(struct inode *ip, in |
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dp = (struct direct *)((char *)dp + dp->d_reclen); |
dp = (struct direct *)((char *)dp + dp->d_reclen); |
} |
} |
if (i > dirblksiz) { |
if (i > dirblksiz) { |
brelse(bp); |
DIRHASH_UNLOCK(dh); |
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brelse(bp, 0); |
return (-1); |
return (-1); |
} |
} |
slotstart = pos + i; |
slotstart = pos + i; |
Line 529 ufsdirhash_findfree(struct inode *ip, in |
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Line 559 ufsdirhash_findfree(struct inode *ip, in |
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if (dp->d_ino != 0) |
if (dp->d_ino != 0) |
freebytes -= DIRSIZ(0, dp, needswap); |
freebytes -= DIRSIZ(0, dp, needswap); |
if (dp->d_reclen == 0) { |
if (dp->d_reclen == 0) { |
brelse(bp); |
DIRHASH_UNLOCK(dh); |
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brelse(bp, 0); |
return (-1); |
return (-1); |
} |
} |
i += dp->d_reclen; |
i += dp->d_reclen; |
dp = (struct direct *)((char *)dp + dp->d_reclen); |
dp = (struct direct *)((char *)dp + dp->d_reclen); |
} |
} |
if (i > dirblksiz) { |
if (i > dirblksiz) { |
brelse(bp); |
DIRHASH_UNLOCK(dh); |
|
brelse(bp, 0); |
return (-1); |
return (-1); |
} |
} |
if (freebytes < slotneeded) |
if (freebytes < slotneeded) |
panic("ufsdirhash_findfree: free mismatch"); |
panic("ufsdirhash_findfree: free mismatch"); |
brelse(bp); |
DIRHASH_UNLOCK(dh); |
|
brelse(bp, 0); |
*slotsize = pos + i - slotstart; |
*slotsize = pos + i - slotstart; |
return (slotstart); |
return (slotstart); |
} |
} |
Line 559 ufsdirhash_enduseful(struct inode *ip) |
|
Line 592 ufsdirhash_enduseful(struct inode *ip) |
|
|
|
if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return (-1); |
return (-1); |
|
|
DIRHASH_LOCK(dh); |
DIRHASH_LOCK(dh); |
if (dh->dh_hash == NULL) { |
if (dh->dh_hash == NULL) { |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
Line 593 ufsdirhash_add(struct inode *ip, struct |
|
Line 627 ufsdirhash_add(struct inode *ip, struct |
|
|
|
if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return; |
return; |
|
|
DIRHASH_LOCK(dh); |
DIRHASH_LOCK(dh); |
if (dh->dh_hash == NULL) { |
if (dh->dh_hash == NULL) { |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
Line 639 ufsdirhash_remove(struct inode *ip, stru |
|
Line 674 ufsdirhash_remove(struct inode *ip, stru |
|
|
|
if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return; |
return; |
|
|
DIRHASH_LOCK(dh); |
DIRHASH_LOCK(dh); |
if (dh->dh_hash == NULL) { |
if (dh->dh_hash == NULL) { |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
Line 735 ufsdirhash_dirtrunc(struct inode *ip, do |
|
Line 771 ufsdirhash_dirtrunc(struct inode *ip, do |
|
|
|
if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return; |
return; |
|
|
DIRHASH_LOCK(dh); |
DIRHASH_LOCK(dh); |
if (dh->dh_hash == NULL) { |
if (dh->dh_hash == NULL) { |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
Line 795 ufsdirhash_checkblock(struct inode *ip, |
|
Line 832 ufsdirhash_checkblock(struct inode *ip, |
|
return; |
return; |
if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return; |
return; |
|
|
DIRHASH_LOCK(dh); |
DIRHASH_LOCK(dh); |
if (dh->dh_hash == NULL) { |
if (dh->dh_hash == NULL) { |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
Line 871 ufsdirhash_hash(struct dirhash *dh, cons |
|
Line 909 ufsdirhash_hash(struct dirhash *dh, cons |
|
* by the value specified by `diff'. |
* by the value specified by `diff'. |
* |
* |
* The caller must ensure we have exclusive access to `dh'; normally |
* The caller must ensure we have exclusive access to `dh'; normally |
* that means that dh_mtx should be held, but this is also called |
* that means that dh_lock should be held, but this is also called |
* from ufsdirhash_build() where exclusive access can be assumed. |
* from ufsdirhash_build() where exclusive access can be assumed. |
*/ |
*/ |
static void |
static void |
Line 879 ufsdirhash_adjfree(struct dirhash *dh, d |
|
Line 917 ufsdirhash_adjfree(struct dirhash *dh, d |
|
{ |
{ |
int block, i, nfidx, ofidx; |
int block, i, nfidx, ofidx; |
|
|
|
KASSERT(mutex_owned(&dh->dh_lock)); |
|
|
/* Update the per-block summary info. */ |
/* Update the per-block summary info. */ |
block = offset / dirblksiz; |
block = offset / dirblksiz; |
KASSERT(block < dh->dh_nblk && block < dh->dh_dirblks); |
KASSERT(block < dh->dh_nblk && block < dh->dh_dirblks); |
Line 915 ufsdirhash_findslot(struct dirhash *dh, |
|
Line 955 ufsdirhash_findslot(struct dirhash *dh, |
|
{ |
{ |
int slot; |
int slot; |
|
|
|
KASSERT(mutex_owned(&dh->dh_lock)); |
|
|
/* Find the entry. */ |
/* Find the entry. */ |
KASSERT(dh->dh_hused < dh->dh_hlen); |
KASSERT(dh->dh_hused < dh->dh_hlen); |
slot = ufsdirhash_hash(dh, name, namelen); |
slot = ufsdirhash_hash(dh, name, namelen); |
Line 937 ufsdirhash_delslot(struct dirhash *dh, i |
|
Line 979 ufsdirhash_delslot(struct dirhash *dh, i |
|
{ |
{ |
int i; |
int i; |
|
|
|
KASSERT(mutex_owned(&dh->dh_lock)); |
|
|
/* Mark the entry as deleted. */ |
/* Mark the entry as deleted. */ |
DH_ENTRY(dh, slot) = DIRHASH_DEL; |
DH_ENTRY(dh, slot) = DIRHASH_DEL; |
|
|
Line 998 ufsdirhash_recycle(int wanted) |
|
Line 1042 ufsdirhash_recycle(int wanted) |
|
doff_t **hash; |
doff_t **hash; |
u_int8_t *blkfree; |
u_int8_t *blkfree; |
int i, mem, narrays; |
int i, mem, narrays; |
|
size_t hashsz, blkfreesz; |
|
|
DIRHASHLIST_LOCK(); |
DIRHASHLIST_LOCK(); |
while (wanted + ufs_dirhashmem > ufs_dirhashmaxmem) { |
while (wanted + ufs_dirhashmem > ufs_dirhashmaxmem) { |
Line 1020 ufsdirhash_recycle(int wanted) |
|
Line 1065 ufsdirhash_recycle(int wanted) |
|
TAILQ_REMOVE(&ufsdirhash_list, dh, dh_list); |
TAILQ_REMOVE(&ufsdirhash_list, dh, dh_list); |
dh->dh_onlist = 0; |
dh->dh_onlist = 0; |
hash = dh->dh_hash; |
hash = dh->dh_hash; |
|
hashsz = dh->dh_hashsz; |
dh->dh_hash = NULL; |
dh->dh_hash = NULL; |
blkfree = dh->dh_blkfree; |
blkfree = dh->dh_blkfree; |
|
blkfreesz = dh->dh_blkfreesz; |
dh->dh_blkfree = NULL; |
dh->dh_blkfree = NULL; |
narrays = dh->dh_narrays; |
narrays = dh->dh_narrays; |
mem = narrays * sizeof(*dh->dh_hash) + |
mem = narrays * sizeof(*dh->dh_hash) + |
Line 1031 ufsdirhash_recycle(int wanted) |
|
Line 1078 ufsdirhash_recycle(int wanted) |
|
/* Unlock everything, free the detached memory. */ |
/* Unlock everything, free the detached memory. */ |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
DIRHASHLIST_UNLOCK(); |
DIRHASHLIST_UNLOCK(); |
|
|
for (i = 0; i < narrays; i++) |
for (i = 0; i < narrays; i++) |
DIRHASH_BLKFREE(hash[i]); |
DIRHASH_BLKFREE(hash[i]); |
FREE(hash, M_DIRHASH); |
kmem_free(hash, hashsz); |
FREE(blkfree, M_DIRHASH); |
kmem_free(blkfree, blkfreesz); |
|
|
/* Account for the returned memory, and repeat if necessary. */ |
/* Account for the returned memory, and repeat if necessary. */ |
DIRHASHLIST_LOCK(); |
DIRHASHLIST_LOCK(); |
ufs_dirhashmem -= mem; |
ufs_dirhashmem -= mem; |
} |
} |
/* Success; return with list locked. */ |
/* Success. */ |
return (0); |
return (0); |
} |
} |
|
|
void |
static void |
ufsdirhash_init() |
ufsdirhash_sysctl_init(void) |
{ |
|
#ifdef _LKM |
|
pool_init(&ufsdirhash_pool, DH_NBLKOFF * sizeof(daddr_t), 0, 0, 0, |
|
"ufsdirhash", &pool_allocator_nointr); |
|
#endif |
|
TAILQ_INIT(&ufsdirhash_list); |
|
} |
|
|
|
void |
|
ufsdirhash_done(void) |
|
{ |
|
KASSERT(TAILQ_EMPTY(&ufsdirhash_list)); |
|
#ifdef _LKM |
|
pool_destroy(&ufsdirhash_pool); |
|
#endif |
|
} |
|
|
|
SYSCTL_SETUP(sysctl_vfs_ufs_setup, "sysctl vfs.ufs.dirhash subtree setup") |
|
{ |
{ |
const struct sysctlnode *rnode, *cnode; |
const struct sysctlnode *rnode, *cnode; |
|
|
sysctl_createv(clog, 0, NULL, &rnode, |
sysctl_createv(&ufsdirhash_sysctl_log, 0, NULL, &rnode, |
CTLFLAG_PERMANENT, |
CTLFLAG_PERMANENT, |
CTLTYPE_NODE, "vfs", NULL, |
CTLTYPE_NODE, "vfs", NULL, |
NULL, 0, NULL, 0, |
NULL, 0, NULL, 0, |
CTL_VFS, CTL_EOL); |
CTL_VFS, CTL_EOL); |
|
|
sysctl_createv(clog, 0, &rnode, &rnode, |
sysctl_createv(&ufsdirhash_sysctl_log, 0, &rnode, &rnode, |
CTLFLAG_PERMANENT, |
CTLFLAG_PERMANENT, |
CTLTYPE_NODE, "ufs", |
CTLTYPE_NODE, "ufs", |
SYSCTL_DESCR("ufs"), |
SYSCTL_DESCR("ufs"), |
NULL, 0, NULL, 0, |
NULL, 0, NULL, 0, |
CTL_CREATE, CTL_EOL); |
CTL_CREATE, CTL_EOL); |
|
|
sysctl_createv(clog, 0, &rnode, &rnode, |
sysctl_createv(&ufsdirhash_sysctl_log, 0, &rnode, &rnode, |
CTLFLAG_PERMANENT, |
CTLFLAG_PERMANENT, |
CTLTYPE_NODE, "dirhash", |
CTLTYPE_NODE, "dirhash", |
SYSCTL_DESCR("dirhash"), |
SYSCTL_DESCR("dirhash"), |
NULL, 0, NULL, 0, |
NULL, 0, NULL, 0, |
CTL_CREATE, CTL_EOL); |
CTL_CREATE, CTL_EOL); |
|
|
sysctl_createv(clog, 0, &rnode, &cnode, |
sysctl_createv(&ufsdirhash_sysctl_log, 0, &rnode, &cnode, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLTYPE_INT, "minblocks", |
CTLTYPE_INT, "minblocks", |
SYSCTL_DESCR("minimum hashed directory size in blocks"), |
SYSCTL_DESCR("minimum hashed directory size in blocks"), |
NULL, 0, &ufs_dirhashminblks, 0, |
NULL, 0, &ufs_dirhashminblks, 0, |
CTL_CREATE, CTL_EOL); |
CTL_CREATE, CTL_EOL); |
|
|
sysctl_createv(clog, 0, &rnode, &cnode, |
sysctl_createv(&ufsdirhash_sysctl_log, 0, &rnode, &cnode, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLTYPE_INT, "maxmem", |
CTLTYPE_INT, "maxmem", |
SYSCTL_DESCR("maximum dirhash memory usage"), |
SYSCTL_DESCR("maximum dirhash memory usage"), |
NULL, 0, &ufs_dirhashmaxmem, 0, |
NULL, 0, &ufs_dirhashmaxmem, 0, |
CTL_CREATE, CTL_EOL); |
CTL_CREATE, CTL_EOL); |
|
|
sysctl_createv(clog, 0, &rnode, &cnode, |
sysctl_createv(&ufsdirhash_sysctl_log, 0, &rnode, &cnode, |
CTLFLAG_PERMANENT|CTLFLAG_READONLY, |
CTLFLAG_PERMANENT|CTLFLAG_READONLY, |
CTLTYPE_INT, "memused", |
CTLTYPE_INT, "memused", |
SYSCTL_DESCR("current dirhash memory usage"), |
SYSCTL_DESCR("current dirhash memory usage"), |
NULL, 0, &ufs_dirhashmem, 0, |
NULL, 0, &ufs_dirhashmem, 0, |
CTL_CREATE, CTL_EOL); |
CTL_CREATE, CTL_EOL); |
|
|
sysctl_createv(clog, 0, &rnode, &cnode, |
sysctl_createv(&ufsdirhash_sysctl_log, 0, &rnode, &cnode, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLTYPE_INT, "docheck", |
CTLTYPE_INT, "docheck", |
SYSCTL_DESCR("enable extra sanity checks"), |
SYSCTL_DESCR("enable extra sanity checks"), |
NULL, 0, &ufs_dirhashcheck, 0, |
NULL, 0, &ufs_dirhashcheck, 0, |
CTL_CREATE, CTL_EOL); |
CTL_CREATE, CTL_EOL); |
} |
} |
|
|
|
void |
|
ufsdirhash_init() |
|
{ |
|
|
|
mutex_init(&ufsdirhash_lock, MUTEX_DEFAULT, IPL_NONE); |
|
ufsdirhashblk_cache = pool_cache_init(DH_NBLKOFF * sizeof(daddr_t), 0, |
|
0, 0, "dirhashblk", NULL, IPL_NONE, NULL, NULL, NULL); |
|
ufsdirhash_cache = pool_cache_init(sizeof(struct dirhash), 0, |
|
0, 0, "dirhash", NULL, IPL_NONE, NULL, NULL, NULL); |
|
TAILQ_INIT(&ufsdirhash_list); |
|
ufsdirhash_sysctl_init(); |
|
} |
|
|
|
void |
|
ufsdirhash_done(void) |
|
{ |
|
|
|
KASSERT(TAILQ_EMPTY(&ufsdirhash_list)); |
|
pool_cache_destroy(ufsdirhashblk_cache); |
|
pool_cache_destroy(ufsdirhash_cache); |
|
mutex_destroy(&ufsdirhash_lock); |
|
sysctl_teardown(&ufsdirhash_sysctl_log); |
|
} |