/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
+#include <sys/buf_internal.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include "hfs_cnode.h"
#include "hfs_dbg.h"
#include "hfs_endian.h"
+#include "hfs_btreeio.h"
#include "hfscommon/headers/FileMgrInternal.h"
#include "hfscommon/headers/BTreesPrivate.h"
#define FORCESYNCBTREEWRITES 0
+/* From bsd/vfs/vfs_bio.c */
+extern int bdwrite_internal(struct buf *, int);
static int ClearBTNodes(struct vnode *vp, long blksize, off_t offset, off_t amount);
+static int btree_journal_modify_block_end(struct hfsmount *hfsmp, struct buf *bp);
+void btree_swap_node(struct buf *bp, __unused void *arg);
-__private_extern__
-OSStatus SetBTreeBlockSize(FileReference vp, ByteCount blockSize, ItemCount minBlockCount)
+OSStatus SetBTreeBlockSize(FileReference vp, ByteCount blockSize, __unused ItemCount minBlockCount)
{
BTreeControlBlockPtr bTreePtr;
}
-__private_extern__
-OSStatus GetBTreeBlock(FileReference vp, UInt32 blockNum, GetBlockOptions options, BlockDescriptor *block)
+OSStatus GetBTreeBlock(FileReference vp, u_int32_t blockNum, GetBlockOptions options, BlockDescriptor *block)
{
OSStatus retval = E_NONE;
struct buf *bp = NULL;
+ u_int8_t allow_empty_node;
+
+ /* If the btree block is being read using hint, it is
+ * fine for the swap code to find zeroed out nodes.
+ */
+ if (options & kGetBlockHint) {
+ allow_empty_node = true;
+ } else {
+ allow_empty_node = false;
+ }
if (options & kGetEmptyBlock) {
daddr64_t blkno;
* size once the B-tree control block is set up with the node size
* from the header record.
*/
- retval = hfs_swap_BTNode (block, vp, kSwapBTNodeHeaderRecordOnly);
+ retval = hfs_swap_BTNode (block, vp, kSwapBTNodeHeaderRecordOnly, allow_empty_node);
} else if (block->blockReadFromDisk) {
/*
* The node was just read from disk, so always swap/check it.
* This is necessary on big endian since the test below won't trigger.
*/
- retval = hfs_swap_BTNode (block, vp, kSwapBTNodeBigToHost);
- } else if (*((UInt16 *)((char *)block->buffer + (block->blockSize - sizeof (UInt16)))) == 0x0e00) {
+ retval = hfs_swap_BTNode (block, vp, kSwapBTNodeBigToHost, allow_empty_node);
+ } else if (*((u_int16_t *)((char *)block->buffer + (block->blockSize - sizeof (u_int16_t)))) == 0x0e00) {
/*
* The node was left in the cache in non-native order, so swap it.
* This only happens on little endian, after the node is written
* back to disk.
*/
- retval = hfs_swap_BTNode (block, vp, kSwapBTNodeBigToHost);
+ retval = hfs_swap_BTNode (block, vp, kSwapBTNodeBigToHost, allow_empty_node);
}
/*
}
-__private_extern__
void ModifyBlockStart(FileReference vp, BlockDescPtr blockPtr)
{
struct hfsmount *hfsmp = VTOHFS(vp);
bp = (struct buf *) blockPtr->blockHeader;
if (bp == NULL) {
- panic("ModifyBlockStart: null bp for blockdescptr 0x%x?!?\n", blockPtr);
+ panic("hfs: ModifyBlockStart: null bp for blockdescptr %p?!?\n", blockPtr);
return;
}
blockPtr->isModified = 1;
}
-static int
-btree_journal_modify_block_end(struct hfsmount *hfsmp, struct buf *bp)
+void
+btree_swap_node(struct buf *bp, __unused void *arg)
{
+ // struct hfsmount *hfsmp = (struct hfsmount *)arg;
int retval;
struct vnode *vp = buf_vnode(bp);
BlockDescriptor block;
block.blockReadFromDisk = (buf_fromcache(bp) == 0);
block.blockSize = buf_count(bp);
- // XXXdbg have to swap the data before it goes in the journal
- retval = hfs_swap_BTNode (&block, vp, kSwapBTNodeHostToBig);
+ /* Swap the data now that this node is ready to go to disk.
+ * We allow swapping of zeroed out nodes here because we might
+ * be writing node whose last record just got deleted.
+ */
+ retval = hfs_swap_BTNode (&block, vp, kSwapBTNodeHostToBig, true);
if (retval)
- panic("btree_journal_modify_block_end: about to write corrupt node!\n");
+ panic("hfs: btree_swap_node: about to write corrupt node!\n");
+}
+
- return journal_modify_block_end(hfsmp->jnl, bp);
+static int
+btree_journal_modify_block_end(struct hfsmount *hfsmp, struct buf *bp)
+{
+ return journal_modify_block_end(hfsmp->jnl, bp, btree_swap_node, hfsmp);
}
-__private_extern__
OSStatus ReleaseBTreeBlock(FileReference vp, BlockDescPtr blockPtr, ReleaseBlockOptions options)
{
struct hfsmount *hfsmp = VTOHFS(vp);
- extern int bdwrite_internal(struct buf *, int);
OSStatus retval = E_NONE;
struct buf *bp = NULL;
} else {
buf_brelse(bp); /* note: B-tree code will clear blockPtr->blockHeader and blockPtr->buffer */
}
+
+ /* Don't let anyone else try to use this bp, it's been consumed */
+ blockPtr->blockHeader = NULL;
+
} else {
if (options & kForceWriteBlock) {
if (hfsmp->jnl) {
if (blockPtr->isModified == 0) {
- panic("hfs: releaseblock: modified is 0 but forcewrite set! bp 0x%x\n", bp);
+ panic("hfs: releaseblock: modified is 0 but forcewrite set! bp %p\n", bp);
}
retval = btree_journal_modify_block_end(hfsmp, bp);
} else {
retval = VNOP_BWRITE(bp);
}
+
+ /* Don't let anyone else try to use this bp, it's been consumed */
+ blockPtr->blockHeader = NULL;
+
} else if (options & kMarkBlockDirty) {
struct timeval tv;
microuptime(&tv);
* isn't going to work.
*
*/
- extern int count_lock_queue(void);
-
/* Don't hog all the buffers... */
if (count_lock_queue() > kMaxLockedMetaBuffers) {
hfs_btsync(vp, HFS_SYNCTRANS);
*/
if (hfsmp->jnl) {
if (blockPtr->isModified == 0) {
- panic("hfs: releaseblock: modified is 0 but markdirty set! bp 0x%x\n", bp);
+ panic("hfs: releaseblock: modified is 0 but markdirty set! bp %p\n", bp);
}
retval = btree_journal_modify_block_end(hfsmp, bp);
blockPtr->isModified = 0;
buf_clearflags(bp, B_LOCKED);
buf_bawrite(bp);
}
+
+ /* Don't let anyone else try to use this bp, it's been consumed */
+ blockPtr->blockHeader = NULL;
+
} else {
// check if we had previously called journal_modify_block_start()
// on this block and if so, abort it (which will call buf_brelse()).
} else {
buf_brelse(bp); /* note: B-tree code will clear blockPtr->blockHeader and blockPtr->buffer */
}
- };
- };
+
+ /* Don't let anyone else try to use this bp, it's been consumed */
+ blockPtr->blockHeader = NULL;
+ }
+ }
exit:
return (retval);
}
-#define HFS_CLUMP_ADJ_LIMIT (200*1024*1024)
-
-__private_extern__
OSStatus ExtendBTreeFile(FileReference vp, FSSize minEOF, FSSize maxEOF)
{
#pragma unused (maxEOF)
OSStatus retval = 0, ret = 0;
- UInt64 actualBytesAdded, origSize;
- UInt64 bytesToAdd;
+ int64_t actualBytesAdded, origSize;
+ u_int64_t bytesToAdd;
u_int32_t startAllocation;
u_int32_t fileblocks;
- BTreeInfoRec btInfo;
+ BTreeInfoRec btInfo;
ExtendedVCB *vcb;
- FCB *filePtr;
- struct proc *p = NULL;
- UInt64 trim = 0;
- int lockflags = 0;
+ FCB *filePtr;
+ struct proc *p = NULL;
+ int64_t trim = 0;
+ int lockflags = 0;
filePtr = GetFileControlBlock(vp);
- if ( minEOF > filePtr->fcbEOF )
+ if ( (off_t)minEOF > filePtr->fcbEOF )
{
bytesToAdd = minEOF - filePtr->fcbEOF;
}
vcb = VTOVCB(vp);
-
- /* Take past growth into account when extending the catalog file. */
- if ((VTOC(vp)->c_fileid == kHFSCatalogFileID) &&
- (bytesToAdd / vcb->blockSize) < filePtr->fcbExtents[0].blockCount) {
- bytesToAdd = filePtr->fcbExtents[0].blockCount * (UInt64)vcb->blockSize;
- bytesToAdd = MIN(bytesToAdd, HFS_CLUMP_ADJ_LIMIT);
- }
+
/*
* The Extents B-tree can't have overflow extents. ExtendFileC will
* return an error if an attempt is made to extend the Extents B-tree
// of the btree node size. if we can't get a contiguous chunk that
// is at least the node size then we break out of the loop and let
// the error propagate back up.
- do {
+ while((off_t)bytesToAdd >= btInfo.nodeSize) {
+ do {
retval = ExtendFileC(vcb, filePtr, bytesToAdd, 0,
- kEFContigMask | kEFMetadataMask,
- &actualBytesAdded);
+ kEFContigMask | kEFMetadataMask | kEFNoClumpMask,
+ (int64_t *)&actualBytesAdded);
if (retval == dskFulErr && actualBytesAdded == 0) {
-
- if (bytesToAdd == btInfo.nodeSize || bytesToAdd < (minEOF - origSize)) {
- // if we're here there's nothing else to try, we're out
- // of space so we break and bail out.
- break;
- } else {
- bytesToAdd >>= 1;
- if (bytesToAdd < btInfo.nodeSize) {
- bytesToAdd = btInfo.nodeSize;
- } else if ((bytesToAdd % btInfo.nodeSize) != 0) {
- // make sure it's an integer multiple of the nodeSize
- bytesToAdd -= (bytesToAdd % btInfo.nodeSize);
- }
- }
+ bytesToAdd >>= 1;
+ if (bytesToAdd < btInfo.nodeSize) {
+ break;
+ } else if ((bytesToAdd % btInfo.nodeSize) != 0) {
+ // make sure it's an integer multiple of the nodeSize
+ bytesToAdd -= (bytesToAdd % btInfo.nodeSize);
+ }
}
- } while (retval == dskFulErr && actualBytesAdded == 0);
+ } while (retval == dskFulErr && actualBytesAdded == 0);
+
+ if (retval == dskFulErr && actualBytesAdded == 0 && bytesToAdd <= btInfo.nodeSize) {
+ break;
+ }
+
+ filePtr->fcbEOF = (u_int64_t)filePtr->ff_blocks * (u_int64_t)vcb->blockSize;
+ bytesToAdd = minEOF - filePtr->fcbEOF;
+ }
/*
* If a new extent was added then move the roving allocator
if ((retval == 0) &&
((VCBTOHFS(vcb)->hfs_flags & HFS_METADATA_ZONE) == 0) &&
(vcb->nextAllocation > startAllocation) &&
- ((vcb->nextAllocation + fileblocks) < vcb->totalBlocks)) {
- vcb->nextAllocation += fileblocks;
+ ((vcb->nextAllocation + fileblocks) < vcb->allocLimit)) {
+ HFS_UPDATE_NEXT_ALLOCATION(vcb, vcb->nextAllocation + fileblocks);
}
filePtr->fcbEOF = (u_int64_t)filePtr->ff_blocks * (u_int64_t)vcb->blockSize;
// it grew the file to be big enough for our needs. If this is
// the case, we don't care about retval so we blow it away.
//
- if (filePtr->fcbEOF >= minEOF && retval != 0) {
+ if (filePtr->fcbEOF >= (off_t)minEOF && retval != 0) {
retval = 0;
}
// size. otherwise we trim back to be an even multiple of the
// btree node size.
//
- if ((filePtr->fcbEOF < minEOF) || (actualBytesAdded % btInfo.nodeSize) != 0) {
+ if ((filePtr->fcbEOF < (off_t)minEOF) || ((filePtr->fcbEOF - origSize) % btInfo.nodeSize) != 0) {
- if (filePtr->fcbEOF < minEOF) {
+ if (filePtr->fcbEOF < (off_t)minEOF) {
retval = dskFulErr;
if (filePtr->fcbEOF < origSize) {
}
trim = filePtr->fcbEOF - origSize;
- if (trim != actualBytesAdded) {
- panic("hfs: trim == %lld but actualBytesAdded == %lld\n",
- trim, actualBytesAdded);
- }
} else {
- trim = (actualBytesAdded % btInfo.nodeSize);
+ trim = ((filePtr->fcbEOF - origSize) % btInfo.nodeSize);
}
- ret = TruncateFileC(vcb, filePtr, filePtr->fcbEOF - trim, 0);
+ ret = TruncateFileC(vcb, filePtr, filePtr->fcbEOF - trim, 0, 0, FTOC(filePtr)->c_fileid, 0);
filePtr->fcbEOF = (u_int64_t)filePtr->ff_blocks * (u_int64_t)vcb->blockSize;
// XXXdbg - panic if the file didn't get trimmed back properly
if ((filePtr->fcbEOF % btInfo.nodeSize) != 0) {
- panic("hfs: truncate file didn't! fcbEOF %lld nsize %d fcb 0x%x\n",
+ panic("hfs: truncate file didn't! fcbEOF %lld nsize %d fcb %p\n",
filePtr->fcbEOF, btInfo.nodeSize, filePtr);
}
if (ret) {
// XXXdbg - this probably doesn't need to be a panic()
- panic("hfs: error truncating btree files (sz 0x%llx, trim %lld, ret %d)\n",
- filePtr->fcbEOF, trim, ret);
+ panic("hfs: error truncating btree files (sz 0x%llx, trim %lld, ret %ld)\n",
+ filePtr->fcbEOF, trim, (long)ret);
goto out;
}
- actualBytesAdded -= trim;
}
if(VTOC(vp)->c_fileid != kHFSExtentsFileID) {
lockflags = 0;
if ((filePtr->fcbEOF % btInfo.nodeSize) != 0) {
- panic("hfs: extendbtree: fcb 0x%x has eof 0x%llx not a multiple of 0x%x (trim %llx)\n",
+ panic("hfs: extendbtree: fcb %p has eof 0x%llx not a multiple of 0x%x (trim %llx)\n",
filePtr, filePtr->fcbEOF, btInfo.nodeSize, trim);
}
(void) hfs_update(vp, TRUE);
}
- ret = ClearBTNodes(vp, btInfo.nodeSize, filePtr->fcbEOF - actualBytesAdded, actualBytesAdded);
+ ret = ClearBTNodes(vp, btInfo.nodeSize, origSize, (filePtr->fcbEOF - origSize));
out:
if (retval == 0)
retval = ret;
extern char hfs_attrname[];
-extern int hfs_attrkeycompare(HFSPlusAttrKey *searchKey, HFSPlusAttrKey *trialKey);
-
-int hfs_create_attr_btree(struct hfsmount *hfsmp, uint32_t nodesize, uint32_t nodecnt);
-
/*
* Create an HFS+ Attribute B-tree File.
*
- * A journal transaction must be already started.
+ * No global resources should be held.
*/
int
-hfs_create_attr_btree(struct hfsmount *hfsmp, uint32_t nodesize, uint32_t nodecnt)
+hfs_create_attr_btree(struct hfsmount *hfsmp, u_int32_t nodesize, u_int32_t nodecnt)
{
- struct vnode* vp = NULL;
+ struct vnode* vp = NULLVP;
struct cat_desc cndesc;
struct cat_attr cnattr;
struct cat_fork cfork;
BTreeControlBlockPtr btcb = NULL;
struct buf *bp = NULL;
void * buffer;
+ u_int8_t *bitmap;
u_int16_t *index;
+ u_int32_t node_num, num_map_nodes;
+ u_int32_t bytes_per_map_record;
+ u_int32_t temp;
u_int16_t offset;
+ int intrans = 0;
int result;
+ int newvnode_flags = 0;
+
+again:
+ /*
+ * Serialize creation using HFS_CREATING_BTREE flag.
+ */
+ lck_mtx_lock(&hfsmp->hfs_mutex);
+ if (hfsmp->hfs_flags & HFS_CREATING_BTREE) {
+ /* Someone else beat us, wait for them to finish. */
+ (void) msleep(hfsmp->hfs_attribute_cp, &hfsmp->hfs_mutex,
+ PDROP | PINOD, "hfs_create_attr_btree", 0);
+ if (hfsmp->hfs_attribute_vp) {
+ return (0);
+ }
+ goto again;
+ }
+ hfsmp->hfs_flags |= HFS_CREATING_BTREE;
+ lck_mtx_unlock(&hfsmp->hfs_mutex);
- printf("Creating HFS+ Attribute B-tree File (%d nodes) on %s\n", nodecnt, hfsmp->vcbVN);
+ /* Check if were out of usable disk space. */
+ if ((hfs_freeblks(hfsmp, 1) == 0)) {
+ result = ENOSPC;
+ goto exit;
+ }
/*
* Set up Attribute B-tree vnode
+ * (this must be done before we start a transaction
+ * or take any system file locks)
*/
bzero(&cndesc, sizeof(cndesc));
cndesc.cd_parentcnid = kHFSRootParentID;
cndesc.cd_flags |= CD_ISMETA;
- cndesc.cd_nameptr = hfs_attrname;
+ cndesc.cd_nameptr = (const u_int8_t *)hfs_attrname;
cndesc.cd_namelen = strlen(hfs_attrname);
cndesc.cd_cnid = kHFSAttributesFileID;
bzero(&cnattr, sizeof(cnattr));
- cnattr.ca_nlink = 1;
+ cnattr.ca_linkcount = 1;
cnattr.ca_mode = S_IFREG;
cnattr.ca_fileid = cndesc.cd_cnid;
bzero(&cfork, sizeof(cfork));
cfork.cf_clump = nodesize * nodecnt;
- result = hfs_getnewvnode(hfsmp, NULL, NULL, &cndesc, 0, &cnattr, &cfork, &vp);
- if (result)
- return (result);
-
+ result = hfs_getnewvnode(hfsmp, NULL, NULL, &cndesc, 0, &cnattr,
+ &cfork, &vp, &newvnode_flags);
+ if (result) {
+ goto exit;
+ }
/*
* Set up Attribute B-tree control block
*/
/*
* Allocate some space
*/
+ if (hfs_start_transaction(hfsmp) != 0) {
+ result = EINVAL;
+ goto exit;
+ }
+ intrans = 1;
+
+ /* Note ExtendBTreeFile will acquire the necessary system file locks. */
result = ExtendBTreeFile(vp, nodesize, cfork.cf_clump);
if (result)
goto exit;
btcb->totalNodes = VTOF(vp)->ff_size / nodesize;
- btcb->freeNodes = btcb->totalNodes - 1;
+ /*
+ * Figure out how many map nodes we'll need.
+ *
+ * bytes_per_map_record = the number of bytes in the map record of a
+ * map node. Since that is the only record in the node, it is the size
+ * of the node minus the node descriptor at the start, and two record
+ * offsets at the end of the node. The "- 2" is to round the size down
+ * to a multiple of 4 bytes (since sizeof(BTNodeDescriptor) is not a
+ * multiple of 4).
+ *
+ * The value "temp" here is the number of *bits* in the map record of
+ * the header node.
+ */
+ bytes_per_map_record = nodesize - sizeof(BTNodeDescriptor) - 2*sizeof(u_int16_t) - 2;
+ temp = 8 * (nodesize - sizeof(BTNodeDescriptor)
+ - sizeof(BTHeaderRec)
+ - kBTreeHeaderUserBytes
+ - 4 * sizeof(u_int16_t));
+ if (btcb->totalNodes > temp) {
+ num_map_nodes = howmany(btcb->totalNodes - temp, bytes_per_map_record * 8);
+ }
+ else {
+ num_map_nodes = 0;
+ }
+
+ btcb->freeNodes = btcb->totalNodes - 1 - num_map_nodes;
+
/*
* Initialize the b-tree header on disk
*/
panic("hfs_create_attr_btree: bad buffer size (%d)\n", buf_size(bp));
bzero(buffer, nodesize);
- index = (int16_t *)buffer;
+ index = (u_int16_t *)buffer;
/* FILL IN THE NODE DESCRIPTOR: */
ndp = (BTNodeDescriptor *)buffer;
+ if (num_map_nodes != 0)
+ ndp->fLink = 1;
ndp->kind = kBTHeaderNode;
ndp->numRecords = 3;
offset = sizeof(BTNodeDescriptor);
index[(nodesize / 2) - 1] = offset;
/* FILL IN THE HEADER RECORD: */
- bthp = (BTHeaderRec *)((UInt8 *)buffer + offset);
+ bthp = (BTHeaderRec *)((u_int8_t *)buffer + offset);
bthp->nodeSize = nodesize;
bthp->totalNodes = btcb->totalNodes;
bthp->freeNodes = btcb->freeNodes;
offset += kBTreeHeaderUserBytes;
index[(nodesize / 2) - 3] = offset;
- /* FILL IN THE MAP RECORD (only one node in use). */
- *((u_int8_t *)buffer + offset) = 0x80;
+ /* Mark the header node and map nodes in use in the map record.
+ *
+ * NOTE: Assumes that the header node's map record has at least
+ * (num_map_nodes + 1) bits.
+ */
+ bitmap = (u_int8_t *) buffer + offset;
+ temp = num_map_nodes + 1; /* +1 for the header node */
+ while (temp >= 8) {
+ *(bitmap++) = 0xFF;
+ temp -= 8;
+ }
+ *bitmap = ~(0xFF >> temp);
+
offset += nodesize - sizeof(BTNodeDescriptor) - sizeof(BTHeaderRec)
- kBTreeHeaderUserBytes - (4 * sizeof(int16_t));
index[(nodesize / 2) - 4] = offset;
if (result)
goto exit;
- /* Publish new btree file */
+ /* Create the map nodes: node numbers 1 .. num_map_nodes */
+ for (node_num=1; node_num <= num_map_nodes; ++node_num) {
+ bp = buf_getblk(vp, node_num, nodesize, 0, 0, BLK_META);
+ if (bp == NULL) {
+ result = EIO;
+ goto exit;
+ }
+ buffer = (void *)buf_dataptr(bp);
+ blkdesc.buffer = buffer;
+ blkdesc.blockHeader = (void *)bp;
+ blkdesc.blockReadFromDisk = 0;
+ blkdesc.isModified = 0;
+
+ ModifyBlockStart(vp, &blkdesc);
+
+ bzero(buffer, nodesize);
+ index = (u_int16_t *)buffer;
+
+ /* Fill in the node descriptor */
+ ndp = (BTNodeDescriptor *)buffer;
+ if (node_num != num_map_nodes)
+ ndp->fLink = node_num + 1;
+ ndp->kind = kBTMapNode;
+ ndp->numRecords = 1;
+ offset = sizeof(BTNodeDescriptor);
+ index[(nodesize / 2) - 1] = offset;
+
+
+ /* Fill in the map record's offset */
+ /* Note: We assume that the map record is all zeroes */
+ offset = sizeof(BTNodeDescriptor) + bytes_per_map_record;
+ index[(nodesize / 2) - 2] = offset;
+
+ if (hfsmp->jnl) {
+ result = btree_journal_modify_block_end(hfsmp, bp);
+ } else {
+ result = VNOP_BWRITE(bp);
+ }
+ if (result)
+ goto exit;
+ }
+
+ /* Update vp/cp for attribute btree */
+ lck_mtx_lock(&hfsmp->hfs_mutex);
+ hfsmp->hfs_attribute_cp = VTOC(vp);
hfsmp->hfs_attribute_vp = vp;
- (void) hfs_flushvolumeheader(hfsmp, MNT_WAIT, HFS_ALTFLUSH);
+ lck_mtx_unlock(&hfsmp->hfs_mutex);
+ (void) hfs_flushvolumeheader(hfsmp, MNT_WAIT, HFS_ALTFLUSH);
exit:
- hfs_unlock(VTOC(vp));
+ if (vp) {
+ hfs_unlock(VTOC(vp));
+ }
if (result) {
if (btcb) {
FREE (btcb, M_TEMP);
}
- vnode_put(vp);
- // hfs_truncate(); /* XXX need to give back blocks */
+ if (vp) {
+ vnode_put(vp);
+ }
+ /* XXX need to give back blocks ? */
+ }
+ if (intrans) {
+ hfs_end_transaction(hfsmp);
}
- return (result);
-}
+ /*
+ * All done, clear HFS_CREATING_BTREE, and wake up any sleepers.
+ */
+ lck_mtx_lock(&hfsmp->hfs_mutex);
+ hfsmp->hfs_flags &= ~HFS_CREATING_BTREE;
+ wakeup((caddr_t)hfsmp->hfs_attribute_cp);
+ lck_mtx_unlock(&hfsmp->hfs_mutex);
+ return (result);
+}
projects / apple / xnu.git / blobdiff