diff options
Diffstat (limited to 'Source/Kernel/FileSystems')
6 files changed, 135 insertions, 0 deletions
diff --git a/Source/Kernel/FileSystems/RamFS/RamDirNode.class.cpp b/Source/Kernel/FileSystems/RamFS/RamDirNode.class.cpp deleted file mode 100644 index e69de29..0000000 --- a/Source/Kernel/FileSystems/RamFS/RamDirNode.class.cpp +++ /dev/null diff --git a/Source/Kernel/FileSystems/RamFS/RamDirNode.class.h b/Source/Kernel/FileSystems/RamFS/RamDirNode.class.h deleted file mode 100644 index e69de29..0000000 --- a/Source/Kernel/FileSystems/RamFS/RamDirNode.class.h +++ /dev/null diff --git a/Source/Kernel/FileSystems/RamFS/RamFS.class.cpp b/Source/Kernel/FileSystems/RamFS/RamFS.class.cpp index e69de29..c8ed27c 100644 --- a/Source/Kernel/FileSystems/RamFS/RamFS.class.cpp +++ b/Source/Kernel/FileSystems/RamFS/RamFS.class.cpp @@ -0,0 +1,86 @@ +#include "RamFS.class.h" +#include <VFS/DirectoryNode.class.h> +#include "RamFileNode.class.h" + +RamFS::RamFS(u32int maxSize) { + m_maxSize = maxSize; + m_usedSize = 0; + m_isWritable = true; + m_rootNode = new DirectoryNode("/", this, NULL); +} + +bool RamFS::setName(FSNode* node, String name) { return true; } +bool RamFS::setPermissions(FSNode* node, u32int permissions) { return true; } +bool RamFS::setUid(FSNode* node, u32int uid) { return true; } +bool RamFS::setGid(FSNode* node, u32int gid) { return true; } +bool RamFS::setParent(FSNode* node, FSNode* parent) { + if (parent->getFS() == this) return true; + return false; +} + +u32int RamFS::read(FileNode* file, u64int position, u32int max_length, u8int *data) { + RamFileNode *node = (RamFileNode*) file; + if (file->getLength() <= position) return 0; + u32int length = file->getLength() - position; + if (length > max_length) length = max_length; + memcpy(data, node->m_data + position, length); + return length; +} + +bool RamFS::write(FileNode* file, u64int position, u32int length, u8int *data) { + if (!m_isWritable) return false; + RamFileNode *node = (RamFileNode*) file; + + u32int end = position + length; + if (end > node->getLength()) { + if (m_usedSize - node->getLength() + end > m_maxSize) return false; + m_usedSize -= node->getLength(); + m_usedSize += end; + + u8int* data = (u8int*)Mem::kalloc(end); + if (data == 0) return false; //Invalid pointer + if (node->m_data != 0) { + memcpy(data, node->m_data, node->getLength()); + Mem::kfree(node->m_data); + } + node->m_data = data; + node->setLength(end); + } + memcpy(node->m_data + position, data, length); + return true; +} + +bool RamFS::truncate(FileNode* file) { + if (!m_isWritable) return false; + RamFileNode *node = (RamFileNode*) file; + + Mem::kfree(node->m_data); + node->setLength(0); + node->m_data = 0; + + return true; +} + +bool RamFS::loadContents(DirectoryNode* dir) { return true; } //Nothing to do. + +FileNode* RamFS::createFile(DirectoryNode* parent, String name) { + if (!m_isWritable) return NULL; + if (parent->getFS() != this) return NULL; + + RamFileNode* n = new RamFileNode(name, this, parent); + parent->loadContent(); + parent->getChildren().push(n); + + return n; +} + +DirectoryNode* RamFS::createDirectory(DirectoryNode* parent, String name) { + if (!m_isWritable) return NULL; + if (parent->getFS() != this) return NULL; + + DirectoryNode* d = new DirectoryNode(name, this, parent); + parent->loadContent(); + parent->getChildren().push(d); + + return d; +} diff --git a/Source/Kernel/FileSystems/RamFS/RamFS.class.h b/Source/Kernel/FileSystems/RamFS/RamFS.class.h index e69de29..427019c 100644 --- a/Source/Kernel/FileSystems/RamFS/RamFS.class.h +++ b/Source/Kernel/FileSystems/RamFS/RamFS.class.h @@ -0,0 +1,30 @@ +#ifndef DEF_RAMFS_CLASS_H +#define DEF_RAMFS_CLASS_H + +#include <VFS/FileSystem.proto.h> + +class RamFS : public FileSystem { + private: + u32int m_maxSize; + u32int m_usedSize; + + public: + RamFS(u32int maxSize); //Creates an empty RAM file system + RamFS(u8int* ptr, u32int maxSize); //Creates a RAM file system from data loaded in memory. format to be defined + + bool setName(FSNode* node, String name); + bool setPermissions(FSNode* node, u32int permissions); + bool setUid(FSNode* node, u32int uid); + bool setGid(FSNode* node, u32int gid); + bool setParent(FSNode* node, FSNode* parent); + + u32int read(FileNode* file, u64int position, u32int max_length, u8int *data); + bool write(FileNode* file, u64int position, u32int length, u8int *data); + bool truncate(FileNode* file); + + bool loadContents(DirectoryNode* dir); + FileNode* createFile(DirectoryNode* parent, String name); + DirectoryNode* createDirectory(DirectoryNode* parent, String name); +}; + +#endif diff --git a/Source/Kernel/FileSystems/RamFS/RamFileNode.class.cpp b/Source/Kernel/FileSystems/RamFS/RamFileNode.class.cpp deleted file mode 100644 index e69de29..0000000 --- a/Source/Kernel/FileSystems/RamFS/RamFileNode.class.cpp +++ /dev/null diff --git a/Source/Kernel/FileSystems/RamFS/RamFileNode.class.h b/Source/Kernel/FileSystems/RamFS/RamFileNode.class.h index e69de29..142d763 100644 --- a/Source/Kernel/FileSystems/RamFS/RamFileNode.class.h +++ b/Source/Kernel/FileSystems/RamFS/RamFileNode.class.h @@ -0,0 +1,19 @@ +#ifndef DEF_RAMFILENODE_CLASS_H +#define DEF_RAMFILENODE_CLASS_H + +#include <VFS/FileNode.class.h> + +class RamFileNode : public FileNode { + friend class RamFS; + + private: + RamFileNode (String name, FileSystem* fs, FSNode* parent, u32int permissions = 0777, + u32int uid = 0, u32int gid = 0) : + FileNode(name, fs, parent, 0, permissions, uid, gid), m_data(0) {} + + u8int *m_data; + + void setLength(u32int length) { m_length = length; } +}; + +#endif |