Collaboration diagram for PNUT_NODE:

Data Fields
uint8_t	node_type
uint8_t	node_refs
uint16_t	node_links
	Number of links.
uint32_t	node_size
time_t	node_mtime
PNUT_BLKNUM	node_blocks [PNUT_BLOCKS_PER_NODE]

Detailed Description

Node structure.

The Peanut filesystem divides the total space into blocks. It distinguishes between unallocated blocks, data blocks and blocks containing node informations. Each allocated data block is associated to a node block. Unallocated blocks are collected in a linked list.

Peanut knows two types of nodes, file nodes and directory nodes. Each file node represents a file entry and the associated data blocks contain the contents of this file. Each directory node represents a directory and the associated data blocks contain the entries in this directory. Each directory entry in use contains a link to to a node block.

Note:: The node structure must fit into a block.

Field Documentation

uint8_t PNUT_NODE::node_type

Type of this node, 0=file, 1=dir

uint8_t PNUT_NODE::node_refs

Reference counter: Number of active open calls.

uint16_t PNUT_NODE::node_links

Number of links.

For file nodes this number keeps track of the number of directory entries pointing to it. PNUT currently doesn't support link type entries, thus in file entries this is always 1.

For directory nodes the number represents the number of subdirectories plus 2.

uint32_t PNUT_NODE::node_size

Total size of the data area.

time_t PNUT_NODE::node_mtime

Time of last modification.

PNUT_BLKNUM PNUT_NODE::node_blocks[PNUT_BLOCKS_PER_NODE]

Allocated data blocks.

The documentation for this struct was generated from the following file:

fs/pnutfs.c

Data Fields

Detailed Description

Field Documentation