path.c File Reference

#include <_libstd/MAX_PATH.h>
#include <kernel/fs/path.h>
#include <kernel/fs/dentry.h>
#include <kernel/fs/namespace.h>
#include <kernel/fs/vfs.h>
#include <kernel/log/log.h>
#include <kernel/log/panic.h>
#include <kernel/sync/mutex.h>
#include <errno.h>
#include <kernel/sync/rcu.h>
#include <kernel/utils/map.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

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Data Structures
struct	path_flag_short_t
struct	path_flag_t
struct	path_walk_ctx_t

Functions
static mode_t	path_flag_to_mode (const char *flag, size_t length)
static bool	path_is_char_valid (char ch)
uint64_t	pathname_init (pathname_t *pathname, const char *string)
	Initialize a pathname.
static bool	path_is_name_valid (const char *name)
void	path_set (path_t *path, mount_t *mount, dentry_t *dentry)
	Set a path.
void	path_copy (path_t *dest, const path_t *src)
	Copy a path.
void	path_put (path_t *path)
	Put a path.
static uint64_t	path_rcu_walk (path_walk_ctx_t *ctx)
static uint64_t	path_walk_acquire (path_walk_ctx_t *ctx)
static void	path_walk_release (path_walk_ctx_t *ctx)
static void	path_walk_set_lookup (path_walk_ctx_t *ctx, dentry_t *dentry)
static void	path_walk_cleanup (path_walk_ctx_t *ctx)
static uint64_t	path_walk_get_result (path_walk_ctx_t *ctx, path_t *path)
static uint64_t	path_rcu_dotdot (path_walk_ctx_t *ctx)
static uint64_t	path_rcu_symlink (path_walk_ctx_t *ctx, dentry_t *symlink)
static uint64_t	path_rcu_step (path_walk_ctx_t *ctx, const char *name, size_t length)
uint64_t	path_step (path_t *path, mode_t mode, const char *name, namespace_t *ns)
	Walk a single path component.
uint64_t	path_walk (path_t *path, const pathname_t *pathname, namespace_t *ns)
	Walk a pathname to a path.
uint64_t	path_walk_parent (path_t *path, const pathname_t *pathname, char *outLastName, namespace_t *ns)
	Walk a pathname to its parent and get the name of the last component.
uint64_t	path_walk_parent_and_child (const path_t *from, path_t *outParent, path_t *outChild, const pathname_t *pathname, namespace_t *ns)
	Traverse a pathname to its parent and child paths.
uint64_t	path_to_name (const path_t *path, pathname_t *pathname)
	Convert a path to a pathname.
uint64_t	mode_to_string (mode_t mode, char *out, uint64_t length)
	Convert a mode to a string representation.
uint64_t	mode_check (mode_t *mode, mode_t maxPerms)
	Check and adjust mode permissions.

Variables
static path_flag_short_t	shortFlags [UINT8_MAX+1]
static const path_flag_t	flags []

Function Documentation

path_flag_to_mode()

static mode_t path_flag_to_mode ( const char *  flag, size_t  length  )

static

Definition at line 65 of file path.c.

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path_is_char_valid()

static bool path_is_char_valid ( char  ch )

inlinestatic

Definition at line 99 of file path.c.

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path_is_name_valid()

static bool path_is_name_valid ( const char *  name )

static

Definition at line 220 of file path.c.

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path_rcu_walk()

static uint64_t path_rcu_walk ( path_walk_ctx_t *  ctx )

static

Definition at line 516 of file path.c.

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path_walk_acquire()

static uint64_t path_walk_acquire ( path_walk_ctx_t *  ctx )

inlinestatic

Definition at line 301 of file path.c.

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path_walk_release()

static void path_walk_release ( path_walk_ctx_t *  ctx )

inlinestatic

Definition at line 319 of file path.c.

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path_walk_set_lookup()

static void path_walk_set_lookup ( path_walk_ctx_t *  ctx, dentry_t *  dentry  )

inlinestatic

Definition at line 327 of file path.c.

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path_walk_cleanup()

static void path_walk_cleanup ( path_walk_ctx_t *  ctx )

inlinestatic

Definition at line 336 of file path.c.

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path_walk_get_result()

static uint64_t path_walk_get_result ( path_walk_ctx_t *  ctx, path_t *  path  )

inlinestatic

Definition at line 345 of file path.c.

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path_rcu_dotdot()

static uint64_t path_rcu_dotdot ( path_walk_ctx_t *  ctx )

static

Definition at line 374 of file path.c.

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path_rcu_symlink()

static uint64_t path_rcu_symlink ( path_walk_ctx_t *  ctx, dentry_t *  symlink  )

static

Definition at line 415 of file path.c.

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path_rcu_step()

static uint64_t path_rcu_step ( path_walk_ctx_t *  ctx, const char *  name, size_t  length  )

static

Definition at line 464 of file path.c.

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Variable Documentation

shortFlags

path_flag_short_t shortFlags[UINT8_MAX+1]

static

Initial value:

= {
    ['r'] = {.mode = MODE_READ},
    ['w'] = {.mode = MODE_WRITE},
    ['x'] = {.mode = MODE_EXECUTE},
    ['n'] = {.mode = MODE_NONBLOCK},
    ['a'] = {.mode = MODE_APPEND},
    ['c'] = {.mode = MODE_CREATE},
    ['e'] = {.mode = MODE_EXCLUSIVE},
    ['p'] = {.mode = MODE_PARENTS},
    ['t'] = {.mode = MODE_TRUNCATE},
    ['d'] = {.mode = MODE_DIRECTORY},
    ['R'] = {.mode = MODE_RECURSIVE},
    ['l'] = {.mode = MODE_NOFOLLOW},
    ['P'] = {.mode = MODE_PRIVATE},
    ['g'] = {.mode = MODE_PROPAGATE},
    ['L'] = {.mode = MODE_LOCKED},
}

Definition at line 23 of file path.c.

flags

const path_flag_t flags[]

static

Initial value:

= {
    {.mode = MODE_READ, .name = "read"},
    {.mode = MODE_WRITE, .name = "write"},
    {.mode = MODE_EXECUTE, .name = "execute"},
    {.mode = MODE_NONBLOCK, .name = "nonblock"},
    {.mode = MODE_APPEND, .name = "append"},
    {.mode = MODE_CREATE, .name = "create"},
    {.mode = MODE_EXCLUSIVE, .name = "exclusive"},
    {.mode = MODE_PARENTS, .name = "parents"},
    {.mode = MODE_TRUNCATE, .name = "truncate"},
    {.mode = MODE_DIRECTORY, .name = "directory"},
    {.mode = MODE_RECURSIVE, .name = "recursive"},
    {.mode = MODE_NOFOLLOW, .name = "nofollow"},
    {.mode = MODE_PRIVATE, .name = "private"},
    {.mode = MODE_PROPAGATE, .name = "propagate"},
    {.mode = MODE_LOCKED, .name = "locked"},
}

Definition at line 47 of file path.c.