#include <miniOS/fs/vfs.h>

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Functions
void	tmpfs_init (void)
vfs_ops_t *	tmpfs_get_ops (void)
uint32_t	tmpfs_alloc_root (void)
: Filename (not full path; no '/' allowed).
tmpfs_create() - Create a new regular file in a tmpfs directory. @parent_ino: Inode number of the parent directory (must be a directory). @new_ino_out: Set to the new inode number on success. Allocates a new inode with EXT2_S_IFREG \| (mode & 0777); 0 mode defaults to 0644. Appends an ext2_dirent_t entry to the parent directory's data block. Returns : 0 on success, -1 if parent not found, not a directory, name too long, or inode table full.
int	tmpfs_create (uint32_t parent_ino, const char name, uint16_t mode, uint32_t new_ino_out)
int	tmpfs_create_device (uint32_t parent_ino, const char name, uint8_t device_type, uint32_t new_ino_out)
: Filename (no '/' allowed).
tmpfs_mknod() - Create a device special file (char or block device node). @parent_ino: Inode number of the parent directory. @mode: EXT2_S_IFCHR\|perms or EXT2_S_IFBLK\|perms. @dev: Device number (major<<8)\|minor; stored in i_rdev. @new_ino_out: Set to the new inode number on success. Maps well-known (major,minor) pairs to VFS_DEVICE_* constants so that open/read/write dispatch works for TTY (5,0) and null (1,3) devices. Returns : 0 on success, -1 on error, -22 if mode type is not IFCHR/IFBLK.
int	tmpfs_mknod (uint32_t parent_ino, const char name, uint16_t mode, uint32_t dev, uint32_t new_ino_out)
: Directory name (no '/' allowed).
tmpfs_mkdir() - Create a new directory in a tmpfs directory. @parent_ino: Inode number of the parent directory. @new_ino_out: Set to the new inode number on success. Allocates a new inode (EXT2_S_IFDIR \| 0755), adds "." and ".." entries, links the new directory into parent. Returns : 0 on success, -1 on error.
int	tmpfs_mkdir (uint32_t parent_ino, const char name, uint32_t new_ino_out)
: Name of the file to remove (regular file only).
tmpfs_unlink() - Remove a file from its parent directory and free its inode. @parent_ino: Inode number of the parent directory. Removes the directory entry from the parent. Frees all data blocks and clears the inode slot. Immediate deletion (no open-file keep-alive). Returns : 0 on success, -1 if not found or is a directory.
int	tmpfs_unlink (uint32_t parent_ino, const char *name)
: Name of the subdirectory to remove.
tmpfs_rmdir() - Remove an empty directory. @parent_ino: Inode number of the parent directory. Only succeeds if the directory contains only "." and ".." entries. Returns : 0 on success, -1 if not found, not empty, or not a directory.
int	tmpfs_rmdir (uint32_t parent_ino, const char *name)

Function Documentation

◆ tmpfs_alloc_root()

uint32_t tmpfs_alloc_root ( void )

tmpfs_alloc_root() - Allocate a fresh root directory inode for a new mount.

Each call to mount tmpfs <target> should call this to get an isolated root directory. The returned inode number is stored in vfs_mount_t.root_ino and activated via set_root() before each path lookup on that mount.

Returns: : New inode number, or 0 on failure (inode table full).

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◆ tmpfs_create()

int tmpfs_create	(	uint32_t	parent_ino,
		const char *	name,
		uint16_t	mode,
		uint32_t *	new_ino_out )

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◆ tmpfs_create_device()

int tmpfs_create_device	(	uint32_t	parent_ino,
		const char *	name,
		uint8_t	device_type,
		uint32_t *	new_ino_out )

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◆ tmpfs_get_ops()

vfs_ops_t * tmpfs_get_ops ( void )

tmpfs_get_ops() - Return a pointer to the static tmpfs vfs_ops_t table.

The returned pointer is valid for the lifetime of the kernel.

Returns: : Pointer to static vfs_ops_t with lookup, read, readdir, write, flush set.

◆ tmpfs_init()

void tmpfs_init ( void )

tmpfs_init() - Initialise the tmpfs inode pool and register the "tmpfs" type.

Initialises the shared inode table (inode 1 = internal sentinel root) and calls register_filesystem("tmpfs", ...) so that vfs_mount_fstype("tmpfs", ...) works. Safe to call multiple times — subsequent calls are no-ops. Must be called before any vfs_mount_fstype("tmpfs", ...) invocation.

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