本文整理汇总了C++中Inode::FindBlock方法的典型用法代码示例。如果您正苦于以下问题：C++ Inode::FindBlock方法的具体用法？C++ Inode::FindBlock怎么用？C++ Inode::FindBlock使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Inode的用法示例。
在下文中一共展示了Inode::FindBlock方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
static status_t
ext2_get_file_map(fs_volume* _volume, fs_vnode* _node, off_t offset,
size_t size, struct file_io_vec* vecs, size_t* _count)
{
TRACE("ext2_get_file_map()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
size_t index = 0, max = *_count;
while (true) {
fsblock_t block;
uint32 count = 1;
status_t status = inode->FindBlock(offset, block, &count);
if (status != B_OK)
return status;
if (block > volume->NumBlocks()) {
panic("ext2_get_file_map() found block %" B_PRIu64 " for offset %"
B_PRIdOFF "\n", block, offset);
}
off_t blockOffset = block << volume->BlockShift();
uint32 blockLength = volume->BlockSize() * count;
if (index > 0 && (vecs[index - 1].offset
== blockOffset - vecs[index - 1].length
|| (vecs[index - 1].offset == -1 && block == 0))) {
vecs[index - 1].length += blockLength;
} else {
if (index >= max) {
// we're out of file_io_vecs; let's bail out
*_count = index;
return B_BUFFER_OVERFLOW;
}
// 'block' is 0 for sparse blocks
if (block != 0)
vecs[index].offset = blockOffset;
else
vecs[index].offset = -1;
vecs[index].length = blockLength;
index++;
}
offset += blockLength;
if (offset >= inode->Size() || size <= blockLength) {
// We're done!
*_count = index;
TRACE("ext2_get_file_map for inode %" B_PRIdINO "\n", inode->ID());
return B_OK;
}
size -= blockLength;
}
// can never get here
return B_ERROR;
}示例2:
static status_t
btrfs_get_file_map(fs_volume* _volume, fs_vnode* _node, off_t offset,
size_t size, struct file_io_vec* vecs, size_t* _count)
{
TRACE("btrfs_get_file_map()\n");
Inode* inode = (Inode*)_node->private_node;
size_t index = 0, max = *_count;
while (true) {
off_t blockOffset;
off_t blockLength;
status_t status = inode->FindBlock(offset, blockOffset, &blockLength);
if (status != B_OK)
return status;
if (index > 0 && (vecs[index - 1].offset
== blockOffset - vecs[index - 1].length)) {
vecs[index - 1].length += blockLength;
} else {
if (index >= max) {
// we're out of file_io_vecs; let's bail out
*_count = index;
return B_BUFFER_OVERFLOW;
}
vecs[index].offset = blockOffset;
vecs[index].length = blockLength;
index++;
}
offset += blockLength;
size -= blockLength;
if ((off_t)size <= vecs[index - 1].length || offset >= inode->Size()) {
// We're done!
*_count = index;
TRACE("btrfs_get_file_map for inode %" B_PRIdINO "\n", inode->ID());
return B_OK;
}
}
// can never get here
return B_ERROR;
}示例3: transaction
static status_t
ext2_rename(fs_volume* _volume, fs_vnode* _oldDir, const char* oldName,
fs_vnode* _newDir, const char* newName)
{
TRACE("ext2_rename()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* oldDirectory = (Inode*)_oldDir->private_node;
Inode* newDirectory = (Inode*)_newDir->private_node;
if (oldDirectory == newDirectory && strcmp(oldName, newName) == 0)
return B_OK;
Transaction transaction(volume->GetJournal());
oldDirectory->WriteLockInTransaction(transaction);
if (oldDirectory != newDirectory)
newDirectory->WriteLockInTransaction(transaction);
status_t status = oldDirectory->CheckPermissions(W_OK);
if (status == B_OK)
status = newDirectory->CheckPermissions(W_OK);
if (status != B_OK)
return status;
HTree oldHTree(volume, oldDirectory);
DirectoryIterator* oldIterator;
status = oldHTree.Lookup(oldName, &oldIterator);
if (status != B_OK)
return status;
ObjectDeleter<DirectoryIterator> oldIteratorDeleter(oldIterator);
ino_t oldID;
status = oldIterator->FindEntry(oldName, &oldID);
if (status != B_OK)
return status;
if (oldDirectory != newDirectory) {
TRACE("ext2_rename(): Different parent directories\n");
CachedBlock cached(volume);
ino_t parentID = newDirectory->ID();
ino_t oldDirID = oldDirectory->ID();
do {
Vnode vnode(volume, parentID);
Inode* parent;
status = vnode.Get(&parent);
if (status != B_OK)
return B_IO_ERROR;
fsblock_t blockNum;
status = parent->FindBlock(0, blockNum);
if (status != B_OK)
return status;
const HTreeRoot* data = (const HTreeRoot*)cached.SetTo(blockNum);
parentID = data->dotdot.InodeID();
} while (parentID != oldID && parentID != oldDirID
&& parentID != EXT2_ROOT_NODE);
if (parentID == oldID)
return B_BAD_VALUE;
}
HTree newHTree(volume, newDirectory);
DirectoryIterator* newIterator;
status = newHTree.Lookup(newName, &newIterator);
if (status != B_OK)
return status;
ObjectDeleter<DirectoryIterator> newIteratorDeleter(newIterator);
Vnode vnode(volume, oldID);
Inode* inode;
status = vnode.Get(&inode);
if (status != B_OK)
return status;
uint8 fileType;
// TODO: Support all file types?
if (inode->IsDirectory())
fileType = EXT2_TYPE_DIRECTORY;
else if (inode->IsSymLink())
fileType = EXT2_TYPE_SYMLINK;
else
fileType = EXT2_TYPE_FILE;
// Add entry in destination directory
ino_t existentID;
status = newIterator->FindEntry(newName, &existentID);
if (status == B_OK) {
if (existentID == oldID) {
// Remove entry in oldID
//.........这里部分代码省略.........