ramfs.c File Reference

#include <kernel/fs/ramfs.h>
#include <kernel/fs/dentry.h>
#include <kernel/fs/mount.h>
#include <kernel/fs/namespace.h>
#include <kernel/fs/path.h>
#include <kernel/fs/sysfs.h>
#include <kernel/fs/vfs.h>
#include <kernel/log/log.h>
#include <kernel/log/panic.h>
#include <kernel/sync/lock.h>
#include <kernel/sync/mutex.h>
#include <kernel/utils/ref.h>
#include <boot/boot_info.h>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/list.h>
#include <sys/math.h>

Go to the source code of this file.

Functions
static	_Atomic (inode_number_t)
static void	ramfs_dentry_deinit (dentry_t *dentry)
static uint64_t	ramfs_read (file_t *file, void *buffer, uint64_t count, uint64_t *offset)
static uint64_t	ramfs_write (file_t *file, const void *buffer, uint64_t count, uint64_t *offset)
static uint64_t	ramfs_lookup (inode_t *dir, dentry_t *target)
static uint64_t	ramfs_create (inode_t *dir, dentry_t *target, path_flags_t flags)
static void	ramfs_truncate (inode_t *inode)
static uint64_t	ramfs_link (dentry_t *old, inode_t *dir, dentry_t *target)
static uint64_t	ramfs_remove_file (inode_t *parent, dentry_t *target)
static uint64_t	ramfs_remove_directory (inode_t *parent, dentry_t *target)
static uint64_t	ramfs_remove (inode_t *parent, dentry_t *target, path_flags_t flags)
static void	ramfs_inode_cleanup (inode_t *inode)
static void	ramfs_superblock_cleanup (superblock_t *superblock)
static dentry_t *	ramfs_load_file (superblock_t *superblock, dentry_t *parent, const char *name, const boot_file_t *in)
static dentry_t *	ramfs_load_dir (superblock_t *superblock, dentry_t *parent, const char *name, const boot_dir_t *in)
static dentry_t *	ramfs_mount (filesystem_t *fs, const char *devName, void *private)
static inode_t *	ramfs_inode_new (superblock_t *superblock, inode_type_t type, void *buffer, uint64_t size)
void	ramfs_init (const boot_disk_t *disk)
	Registers the ramfs filesystem and mounts it as the root filesystem.

Variables
static mount_t *	mount = NULL
static file_ops_t	fileOps
static inode_ops_t	inodeOps
static dentry_ops_t	dentryOps
static superblock_ops_t	superOps
static filesystem_t	ramfs

Function Documentation

_Atomic()

static _Atomic ( inode_number_t  )

staticnew

Definition at line 26 of file ramfs.c.

ramfs_create()

static uint64_t ramfs_create ( inode_t *  dir, dentry_t *  target, path_flags_t  flags  )

static

Definition at line 114 of file ramfs.c.

References dentry_make_positive(), DEREF_DEFER, ERR, INODE_DIR, INODE_FILE, NULL, PATH_DIRECTORY, ramfs_inode_new(), and inode_t::superblock.

ramfs_dentry_deinit()

static void ramfs_dentry_deinit ( dentry_t *  dentry )

static

Definition at line 49 of file ramfs.c.

References assert, ramfs_dentry_data_t::dentry, ramfs_superblock_data_t::dentrys, DEREF, ramfs_dentry_data_t::entry, free(), list_remove(), ramfs_superblock_data_t::lock, lock_acquire(), lock_release(), NULL, dentry_t::private, superblock_t::private, and dentry_t::superblock.

Referenced by ramfs_remove_directory(), and ramfs_remove_file().

ramfs_inode_cleanup()

static void ramfs_inode_cleanup ( inode_t *  inode )

static

Definition at line 212 of file ramfs.c.

References free(), NULL, and inode_t::private.

ramfs_inode_new()

static inode_t * ramfs_inode_new ( superblock_t *  superblock, inode_type_t  type, void *  buffer, uint64_t  size  )

static

Definition at line 350 of file ramfs.c.

References atomic_fetch_add, inode_t::blocks, buffer, DEREF_DEFER, fileOps, inode_new(), inodeOps, malloc(), memcpy(), NULL, inode_t::private, REF, and inode_t::size.

Referenced by ramfs_create(), ramfs_load_dir(), and ramfs_load_file().

ramfs_link()

static uint64_t ramfs_link ( dentry_t *  old, inode_t *  dir, dentry_t *  target  )

static

Definition at line 146 of file ramfs.c.

References dentry_make_positive(), ERR, dentry_t::inode, and inode_t::linkCount.

ramfs_load_dir()

static dentry_t * ramfs_load_dir ( superblock_t *  superblock, dentry_t *  parent, const char *  name, const boot_dir_t *  in  )

static

Definition at line 273 of file ramfs.c.

References boot_dir_t::children, dentry_make_positive(), dentry_new(), DEREF, DEREF_DEFER, ERR, file, boot_dir_t::files, INODE_DIR, LIST_FOR_EACH, boot_dir_t::name, dentry_t::name, NULL, panic(), superblock_t::private, ramfs_inode_new(), ramfs_load_dir(), ramfs_load_file(), and REF.

Referenced by ramfs_load_dir(), and ramfs_mount().

ramfs_load_file()

static dentry_t * ramfs_load_file ( superblock_t *  superblock, dentry_t *  parent, const char *  name, const boot_file_t *  in  )

static

Definition at line 244 of file ramfs.c.

References boot_file_t::data, dentry_make_positive(), dentry_new(), DEREF_DEFER, ERR, INODE_FILE, NULL, panic(), ramfs_inode_new(), REF, and boot_file_t::size.

Referenced by ramfs_load_dir().

ramfs_lookup()

static uint64_t ramfs_lookup ( inode_t *  dir, dentry_t *  target  )

static

Definition at line 105 of file ramfs.c.

ramfs_mount()

static dentry_t * ramfs_mount ( filesystem_t *  fs, const char *  devName, void *  private  )

static

Definition at line 316 of file ramfs.c.

References superblock_t::blockSize, data, dentryOps, DEREF_DEFER, list_init(), lock_init(), malloc(), superblock_t::maxFileSize, NULL, superblock_t::private, ramfs_load_dir(), REF, boot_disk_t::root, superblock_t::root, superblock_new(), superOps, UINT64_MAX, VFS_DEVICE_NAME_NONE, and VFS_ROOT_ENTRY_NAME.

ramfs_read()

static uint64_t ramfs_read ( file_t *  file, void *  buffer, uint64_t  count, uint64_t *  offset  )

static

Definition at line 66 of file ramfs.c.

References buffer, BUFFER_READ, count, file, dentry_t::inode, inode_t::mutex, MUTEX_SCOPE, NULL, inode_t::private, and inode_t::size.

ramfs_remove()

static uint64_t ramfs_remove ( inode_t *  parent, dentry_t *  target, path_flags_t  flags  )

static

Definition at line 178 of file ramfs.c.

References dentry_t::children, DEREF, ENOTEMPTY, ERR, errno, dentry_t::inode, INODE_DIR, INODE_FILE, LIST_FOR_EACH_SAFE, list_is_empty(), inode_t::mutex, MUTEX_SCOPE, NULL, PATH_RECURSIVE, ramfs_remove(), ramfs_remove_directory(), ramfs_remove_file(), REF, and inode_t::type.

Referenced by ramfs_remove().

ramfs_remove_directory()

static uint64_t ramfs_remove_directory ( inode_t *  parent, dentry_t *  target  )

static

Definition at line 170 of file ramfs.c.

References ramfs_dentry_deinit().

Referenced by ramfs_remove().

ramfs_remove_file()

static uint64_t ramfs_remove_file ( inode_t *  parent, dentry_t *  target  )

static

Definition at line 161 of file ramfs.c.

References dentry_t::inode, inode_t::linkCount, and ramfs_dentry_deinit().

Referenced by ramfs_remove().

ramfs_superblock_cleanup()

static void ramfs_superblock_cleanup ( superblock_t *  superblock )

static

Definition at line 233 of file ramfs.c.

References NULL, and panic().

ramfs_truncate()

static void ramfs_truncate ( inode_t *  inode )

static

Definition at line 136 of file ramfs.c.

References free(), NULL, inode_t::private, and inode_t::size.

ramfs_write()

static uint64_t ramfs_write ( file_t *  file, const void *  buffer, uint64_t  count, uint64_t *  offset  )

static

Definition at line 78 of file ramfs.c.

References buffer, count, ERR, file, dentry_t::inode, memcpy(), memset(), inode_t::mutex, MUTEX_SCOPE, NULL, inode_t::private, realloc(), and inode_t::size.

Variable Documentation

dentryOps

dentry_ops_t dentryOps

static

Initial value:

= {
    .getdents = dentry_generic_getdents,
}

Definition at line 229 of file ramfs.c.

Referenced by ramfs_mount(), and superblock_new().

fileOps

file_ops_t fileOps

static

Initial value:

= {
    .read = ramfs_read,
    .write = ramfs_write,
    .seek = file_generic_seek,
}

Definition at line 99 of file ramfs.c.

Referenced by inode_new(), ramfs_inode_new(), and sysfs_file_new().

inodeOps

inode_ops_t inodeOps

static

Initial value:

= {
    .lookup = ramfs_lookup,
    .create = ramfs_create,
    .truncate = ramfs_truncate,
    .link = ramfs_link,
    .remove = ramfs_remove,
    .cleanup = ramfs_inode_cleanup,
}

Definition at line 220 of file ramfs.c.

Referenced by ramfs_inode_new(), sysfs_dir_new(), and sysfs_file_new().

mount

mount_t* mount = NULL

static

Definition at line 24 of file ramfs.c.

Referenced by ramfs_init().

ramfs

filesystem_t ramfs

static

Initial value:

= {
    .name = RAMFS_NAME,
    .mount = ramfs_mount,
}

Definition at line 380 of file ramfs.c.

Referenced by ramfs_init().

superOps

superblock_ops_t superOps

static

Initial value:

= {
    .cleanup = ramfs_superblock_cleanup,
}

Definition at line 240 of file ramfs.c.

Referenced by ramfs_mount().