version 1.13.2.2, 2007/04/13 11:28:13 |
version 1.35.2.1, 2014/05/18 17:46:22 |
|
|
* $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 $ |
*/ |
*/ |
|
|
|
#include <sys/cdefs.h> |
|
__KERNEL_RCSID(0, "$NetBSD$"); |
|
|
/* |
/* |
* This implements a hash-based lookup scheme for UFS directories. |
* This implements a hash-based lookup scheme for UFS directories. |
*/ |
*/ |
|
|
#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> |
|
|
#include <sys/mount.h> |
#include <sys/mount.h> |
#include <sys/pool.h> |
#include <sys/pool.h> |
#include <sys/sysctl.h> |
#include <sys/sysctl.h> |
|
#include <sys/atomic.h> |
|
|
#include <ufs/ufs/quota.h> |
|
#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> |
|
|
#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)) |
|
|
static MALLOC_DEFINE(M_DIRHASH, "UFS dirhash", "UFS directory hash tables"); |
static u_int ufs_dirhashminblks = 5; |
|
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; |
|
static int ufs_dirhashcheck = 0; |
|
|
|
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 |
|
Line 75 static doff_t ufsdirhash_getprev(struct |
|
int dirblksiz); |
int dirblksiz); |
static int ufsdirhash_recycle(int wanted); |
static int ufsdirhash_recycle(int wanted); |
|
|
static POOL_INIT(ufsdirhash_pool, DH_NBLKOFF * sizeof(daddr_t), 0, 0, 0, |
static pool_cache_t ufsdirhashblk_cache; |
"ufsdirhash", &pool_allocator_nointr, IPL_NONE); |
static pool_cache_t ufsdirhash_cache; |
|
|
#define DIRHASHLIST_LOCK() mutex_enter(&ufsdirhash_lock) |
#define DIRHASHLIST_LOCK() mutex_enter(&ufsdirhash_lock) |
#define DIRHASHLIST_UNLOCK() mutex_exit(&ufsdirhash_lock) |
#define DIRHASHLIST_UNLOCK() mutex_exit(&ufsdirhash_lock) |
#define DIRHASH_LOCK(dh) mutex_enter(&(dh)->dh_lock) |
#define DIRHASH_LOCK(dh) mutex_enter(&(dh)->dh_lock) |
#define DIRHASH_UNLOCK(dh) mutex_exit(&(dh)->dh_lock) |
#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) |
|
#define DIRHASH_BLKFREE(ptr) \ |
|
pool_cache_put(ufsdirhashblk_cache, ptr) |
|
|
/* 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; |
Line 90 static TAILQ_HEAD(, dirhash) ufsdirhash_ |
|
Line 93 static TAILQ_HEAD(, dirhash) ufsdirhash_ |
|
/* Protects: ufsdirhash_list, `dh_list' field, ufs_dirhashmem. */ |
/* Protects: ufsdirhash_list, `dh_list' field, ufs_dirhashmem. */ |
static kmutex_t ufsdirhash_lock; |
static kmutex_t ufsdirhash_lock; |
|
|
|
static struct sysctllog *ufsdirhash_sysctl_log; |
|
|
/* |
/* |
* Locking order: |
* Locking order: |
* ufsdirhash_lock |
* ufsdirhash_lock |
Line 135 ufsdirhash_build(struct inode *ip) |
|
Line 140 ufsdirhash_build(struct inode *ip) |
|
} |
} |
|
|
/* 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); |
|
|
vp = ip->i_vnode; |
vp = ip->i_vnode; |
/* Allocate 50% more entries than this dir size could ever need. */ |
/* Allocate 50% more entries than this dir size could ever need. */ |
KASSERT(ip->i_size >= dirblksiz); |
KASSERT(ip->i_size >= dirblksiz); |
nslots = ip->i_size / DIRECTSIZ(1); |
nslots = ip->i_size / UFS_DIRECTSIZ(1); |
nslots = (nslots * 3 + 1) / 2; |
nslots = (nslots * 3 + 1) / 2; |
narrays = howmany(nslots, DH_NBLKOFF); |
narrays = howmany(nslots, DH_NBLKOFF); |
nslots = narrays * DH_NBLKOFF; |
nslots = narrays * DH_NBLKOFF; |
Line 151 ufsdirhash_build(struct inode *ip) |
|
Line 156 ufsdirhash_build(struct inode *ip) |
|
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(); |
|
if (memreqd + ufs_dirhashmem > ufs_dirhashmaxmem) { |
while (atomic_add_int_nv(&ufs_dirhashmem, memreqd) > |
DIRHASHLIST_UNLOCK(); |
ufs_dirhashmaxmem) { |
|
atomic_add_int(&ufs_dirhashmem, -memreqd); |
if (memreqd > ufs_dirhashmaxmem / 2) |
if (memreqd > ufs_dirhashmaxmem / 2) |
return (-1); |
return (-1); |
|
|
/* 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 |
|
DIRHASHLIST_UNLOCK(); |
} |
} |
ufs_dirhashmem += memreqd; |
|
DIRHASHLIST_UNLOCK(); |
|
|
|
/* |
/* |
* 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; |
|
DIRHASHLIST_UNLOCK(); |
|
return (-1); |
return (-1); |
} |
} |
|
memset(dh, 0, sizeof(*dh)); |
mutex_init(&dh->dh_lock, MUTEX_DEFAULT, IPL_NONE); |
mutex_init(&dh->dh_lock, MUTEX_DEFAULT, IPL_NONE); |
dh->dh_hash = (doff_t **)malloc(narrays * sizeof(dh->dh_hash[0]), |
DIRHASH_LOCK(dh); |
M_DIRHASH, M_NOWAIT | M_ZERO); |
dh->dh_hashsz = narrays * sizeof(dh->dh_hash[0]); |
dh->dh_blkfree = (u_int8_t *)malloc(nblocks * sizeof(dh->dh_blkfree[0]), |
dh->dh_hash = kmem_zalloc(dh->dh_hashsz, KM_NOSLEEP); |
M_DIRHASH, M_NOWAIT); |
dh->dh_blkfreesz = nblocks * sizeof(dh->dh_blkfree[0]); |
|
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 215 ufsdirhash_build(struct inode *ip) |
|
Line 219 ufsdirhash_build(struct inode *ip) |
|
/* 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; |
} |
} |
|
|
Line 225 ufsdirhash_build(struct inode *ip) |
|
Line 229 ufsdirhash_build(struct inode *ip) |
|
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 235 ufsdirhash_build(struct inode *ip) |
|
Line 239 ufsdirhash_build(struct inode *ip) |
|
slot = WRAPINCR(slot, dh->dh_hlen); |
slot = WRAPINCR(slot, dh->dh_hlen); |
dh->dh_hused++; |
dh->dh_hused++; |
DH_ENTRY(dh, slot) = pos; |
DH_ENTRY(dh, slot) = pos; |
ufsdirhash_adjfree(dh, pos, -DIRSIZ(0, ep, needswap), |
ufsdirhash_adjfree(dh, pos, -UFS_DIRSIZ(0, ep, needswap), |
dirblksiz); |
dirblksiz); |
} |
} |
pos += ep->d_reclen; |
pos += ep->d_reclen; |
} |
} |
|
|
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; |
|
DIRHASH_UNLOCK(dh); |
DIRHASHLIST_UNLOCK(); |
DIRHASHLIST_UNLOCK(); |
return (0); |
return (0); |
|
|
fail: |
fail: |
|
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); |
mutex_destroy(&dh->dh_lock); |
mutex_destroy(&dh->dh_lock); |
FREE(dh, M_DIRHASH); |
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; |
|
DIRHASHLIST_UNLOCK(); |
|
return (-1); |
return (-1); |
} |
} |
|
|
Line 278 ufsdirhash_free(struct inode *ip) |
|
Line 282 ufsdirhash_free(struct inode *ip) |
|
|
|
if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return; |
return; |
DIRHASHLIST_LOCK(); |
|
DIRHASH_LOCK(dh); |
|
if (dh->dh_onlist) |
|
TAILQ_REMOVE(&ufsdirhash_list, dh, dh_list); |
|
DIRHASH_UNLOCK(dh); |
|
DIRHASHLIST_UNLOCK(); |
|
|
|
/* The dirhash pointed to by 'dh' is exclusively ours now. */ |
if (dh->dh_onlist) { |
|
DIRHASHLIST_LOCK(); |
|
if (dh->dh_onlist) |
|
TAILQ_REMOVE(&ufsdirhash_list, dh, dh_list); |
|
DIRHASHLIST_UNLOCK(); |
|
} |
|
|
|
/* 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); |
} |
} |
mutex_destroy(&dh->dh_lock); |
mutex_destroy(&dh->dh_lock); |
FREE(dh, M_DIRHASH); |
pool_cache_put(ufsdirhash_cache, dh); |
ip->i_dirhash = NULL; |
ip->i_dirhash = NULL; |
|
|
DIRHASHLIST_LOCK(); |
atomic_add_int(&ufs_dirhashmem, -mem); |
ufs_dirhashmem -= mem; |
|
DIRHASHLIST_UNLOCK(); |
|
} |
} |
|
|
/* |
/* |
Line 314 ufsdirhash_free(struct inode *ip) |
|
Line 316 ufsdirhash_free(struct inode *ip) |
|
* If successful, the directory offset is stored in *offp, and a |
* If successful, the directory offset is stored in *offp, and a |
* pointer to a struct buf containing the entry is stored in *bpp. If |
* pointer to a struct buf containing the entry is stored in *bpp. If |
* prevoffp is non-NULL, the offset of the previous entry within |
* prevoffp is non-NULL, the offset of the previous entry within |
* the DIRBLKSIZ-sized block is stored in *prevoffp (if the entry |
* the UFS_DIRBLKSIZ-sized block is stored in *prevoffp (if the entry |
* is the first in a block, the start of the block is used). |
* is the first in a block, the start of the block is used). |
*/ |
*/ |
int |
int |
Line 332 ufsdirhash_lookup(struct inode *ip, cons |
|
Line 334 ufsdirhash_lookup(struct inode *ip, cons |
|
|
|
if ((dh = ip->i_dirhash) == NULL) |
if ((dh = ip->i_dirhash) == NULL) |
return (EJUSTRETURN); |
return (EJUSTRETURN); |
|
|
/* |
/* |
* 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_lock. |
* score higher than the next entry, and acquire the dh_lock. |
|
|
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); |
|
|
|
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, |
|
NULL, &bp, false) != 0) { |
|
DIRHASH_UNLOCK(dh); |
return (EJUSTRETURN); |
return (EJUSTRETURN); |
|
} |
} |
} |
dp = (struct direct *)((char *)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); |
|
brelse(bp, 0); |
return (EJUSTRETURN); |
return (EJUSTRETURN); |
} |
} |
if (dp->d_namlen == namelen && |
if (dp->d_namlen == namelen && |
bcmp(dp->d_name, name, namelen) == 0) { |
memcmp(dp->d_name, name, namelen) == 0) { |
/* Found. Get the prev offset if needed. */ |
/* Found. Get the prev offset if needed. */ |
if (prevoffp != NULL) { |
if (prevoffp != NULL) { |
if (offset & (dirblksiz - 1)) { |
if (offset & (dirblksiz - 1)) { |
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 |
|
|
/* Check for sequential access, and update offset. */ |
/* Check for sequential access, and update offset. */ |
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 + UFS_DIRSIZ(0, dp, needswap); |
|
DIRHASH_UNLOCK(dh); |
|
|
*bpp = bp; |
*bpp = bp; |
*offp = offset; |
*offp = offset; |
return (0); |
return (0); |
} |
} |
|
|
DIRHASH_LOCK(dh); |
|
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); |
} |
} |
|
|
} |
} |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
if (bp != NULL) |
if (bp != NULL) |
brelse(bp); |
brelse(bp, 0); |
return (ENOENT); |
return (ENOENT); |
} |
} |
|
|
|
|
* the offset of the directory entry that begins the free space. |
* the offset of the directory entry that begins the free space. |
* This will either be the offset of an existing entry that has free |
* This will either be the offset of an existing entry that has free |
* space at the end, or the offset of an entry with d_ino == 0 at |
* space at the end, or the offset of an entry with d_ino == 0 at |
* the start of a DIRBLKSIZ block. |
* the start of a UFS_DIRBLKSIZ block. |
* |
* |
* To use the space, the caller may need to compact existing entries in |
* To use the space, the caller may need to compact existing entries in |
* the directory. The total number of bytes in all of the entries involved |
* the directory. The total number of bytes in all of the entries involved |
Line 501 ufsdirhash_findfree(struct inode *ip, in |
|
Line 507 ufsdirhash_findfree(struct inode *ip, in |
|
|
|
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 520 ufsdirhash_findfree(struct inode *ip, in |
|
Line 527 ufsdirhash_findfree(struct inode *ip, in |
|
|
|
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); |
|
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) { |
|
DIRHASH_UNLOCK(dh); |
return (-1); |
return (-1); |
|
} |
/* 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); |
|
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 > UFS_DIRSIZ(0, dp, needswap)) |
break; |
break; |
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); |
} |
} |
slotstart = pos + i; |
slotstart = pos + i; |
Line 547 ufsdirhash_findfree(struct inode *ip, in |
|
Line 557 ufsdirhash_findfree(struct inode *ip, in |
|
while (i < dirblksiz && freebytes < slotneeded) { |
while (i < dirblksiz && freebytes < slotneeded) { |
freebytes += dp->d_reclen; |
freebytes += dp->d_reclen; |
if (dp->d_ino != 0) |
if (dp->d_ino != 0) |
freebytes -= DIRSIZ(0, dp, needswap); |
freebytes -= UFS_DIRSIZ(0, dp, needswap); |
if (dp->d_reclen == 0) { |
if (dp->d_reclen == 0) { |
brelse(bp); |
DIRHASH_UNLOCK(dh); |
|
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 579 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 613 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 640 ufsdirhash_add(struct inode *ip, struct |
|
Line 655 ufsdirhash_add(struct inode *ip, struct |
|
DH_ENTRY(dh, slot) = offset; |
DH_ENTRY(dh, slot) = offset; |
|
|
/* Update the per-block summary info. */ |
/* Update the per-block summary info. */ |
ufsdirhash_adjfree(dh, offset, -DIRSIZ(0, dirp, needswap), dirblksiz); |
ufsdirhash_adjfree(dh, offset, -UFS_DIRSIZ(0, dirp, needswap), dirblksiz); |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
} |
} |
|
|
Line 659 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 674 ufsdirhash_remove(struct inode *ip, stru |
|
Line 690 ufsdirhash_remove(struct inode *ip, stru |
|
ufsdirhash_delslot(dh, slot); |
ufsdirhash_delslot(dh, slot); |
|
|
/* Update the per-block summary info. */ |
/* Update the per-block summary info. */ |
ufsdirhash_adjfree(dh, offset, DIRSIZ(0, dirp, needswap), dirblksiz); |
ufsdirhash_adjfree(dh, offset, UFS_DIRSIZ(0, dirp, needswap), dirblksiz); |
DIRHASH_UNLOCK(dh); |
DIRHASH_UNLOCK(dh); |
} |
} |
|
|
Line 708 ufsdirhash_move(struct inode *ip, struct |
|
Line 724 ufsdirhash_move(struct inode *ip, struct |
|
|
|
/* |
/* |
* Inform dirhash that the directory has grown by one block that |
* Inform dirhash that the directory has grown by one block that |
* begins at offset (i.e. the new length is offset + DIRBLKSIZ). |
* begins at offset (i.e. the new length is offset + UFS_DIRBLKSIZ). |
*/ |
*/ |
void |
void |
ufsdirhash_newblk(struct inode *ip, doff_t offset) |
ufsdirhash_newblk(struct inode *ip, doff_t offset) |
Line 755 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 815 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 850 ufsdirhash_checkblock(struct inode *ip, |
|
Line 868 ufsdirhash_checkblock(struct inode *ip, |
|
/* Check that the entry exists (will panic if it doesn't). */ |
/* Check that the entry exists (will panic if it doesn't). */ |
ufsdirhash_findslot(dh, dp->d_name, dp->d_namlen, offset + i); |
ufsdirhash_findslot(dh, dp->d_name, dp->d_namlen, offset + i); |
|
|
nfree += dp->d_reclen - DIRSIZ(0, dp, needswap); |
nfree += dp->d_reclen - UFS_DIRSIZ(0, dp, needswap); |
} |
} |
if (i != dirblksiz) |
if (i != dirblksiz) |
panic("ufsdirhash_checkblock: bad dir end"); |
panic("ufsdirhash_checkblock: bad dir end"); |
Line 899 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 980 ufsdirhash_delslot(struct dirhash *dh, i |
|
Line 1000 ufsdirhash_delslot(struct dirhash *dh, i |
|
|
|
/* |
/* |
* Given a directory entry and its offset, find the offset of the |
* Given a directory entry and its offset, find the offset of the |
* previous entry in the same DIRBLKSIZ-sized block. Returns an |
* previous entry in the same UFS_DIRBLKSIZ-sized block. Returns an |
* offset, or -1 if there is no previous entry in the block or some |
* offset, or -1 if there is no previous entry in the block or some |
* other problem occurred. |
* other problem occurred. |
*/ |
*/ |
Line 1022 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 1044 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 1055 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; |
atomic_add_int(&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, IPL_NONE); |
|
#endif |
|
mutex_init(&ufsdirhash_lock, MUTEX_DEFAULT, IPL_NONE); |
|
TAILQ_INIT(&ufsdirhash_list); |
|
} |
|
|
|
void |
|
ufsdirhash_done(void) |
|
{ |
|
KASSERT(TAILQ_EMPTY(&ufsdirhash_list)); |
|
#ifdef _LKM |
|
pool_destroy(&ufsdirhash_pool); |
|
#endif |
|
mutex_destroy(&ufsdirhash_lock); |
|
} |
|
|
|
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, |
|
CTLTYPE_NODE, "vfs", NULL, |
|
NULL, 0, NULL, 0, |
|
CTL_VFS, CTL_EOL); |
|
|
|
sysctl_createv(clog, 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_VFS, 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(void) |
|
{ |
|
|
|
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); |
|
} |