process.c File Reference

#include <kernel/proc/process.h>
#include <kernel/cpu/cpu.h>
#include <kernel/cpu/smp.h>
#include <kernel/fs/file.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/mem/vmm.h>
#include <kernel/sched/thread.h>
#include <kernel/sched/timer.h>
#include <kernel/sched/wait.h>
#include <kernel/sync/lock.h>
#include <kernel/sync/rwlock.h>
#include <assert.h>
#include <stdatomic.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/io.h>
#include <sys/list.h>
#include <sys/math.h>
#include <sys/proc.h>

Go to the source code of this file.

Functions
static	_Atomic (pid_t)
static process_t *	process_file_get_process (file_t *file)
static uint64_t	process_prio_read (file_t *file, void *buffer, uint64_t count, uint64_t *offset)
static uint64_t	process_prio_write (file_t *file, const void *buffer, uint64_t count, uint64_t *offset)
static uint64_t	process_cwd_read (file_t *file, void *buffer, uint64_t count, uint64_t *offset)
static uint64_t	process_cmdline_read (file_t *file, void *buffer, uint64_t count, uint64_t *offset)
static uint64_t	process_note_write (file_t *file, const void *buffer, uint64_t count, uint64_t *offset)
static uint64_t	process_wait_read (file_t *file, void *buffer, uint64_t count, uint64_t *offset)
static wait_queue_t *	process_wait_poll (file_t *file, poll_events_t *revents)
static void	process_inode_cleanup (inode_t *inode)
static uint64_t	process_dir_init (process_t *process, const char *name)
static void	process_free (process_t *process)
static uint64_t	process_init (process_t *process, process_t *parent, const char **argv, const path_t *cwd, priority_t priority)
process_t *	process_new (process_t *parent, const char **argv, const path_t *cwd, priority_t priority)
	Allocates and initializes a new process.
void	process_kill (process_t *process, uint64_t status)
	Kills a process.
bool	process_is_child (process_t *process, pid_t parentId)
	Checks if a process is a child of another process.
void	process_procfs_init (void)
	Initializes the /proc directory.
process_t *	process_get_kernel (void)
	Gets the kernel process.
	SYSCALL_DEFINE (SYS_GETPID, pid_t)

Variables
static process_t	kernelProcess
static bool	kernelProcessInitalized = false
static file_ops_t	prioOps
static file_ops_t	cwdOps
static file_ops_t	cmdlineOps
static file_ops_t	noteOps
static file_ops_t	waitOps
static inode_ops_t	inodeOps

Function Documentation

_Atomic()

static _Atomic ( pid_t  )

staticnew

Definition at line 31 of file process.c.

process_cmdline_read()

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

static

Definition at line 176 of file process.c.

References process_t::argv, argv_get_strings(), buffer, BUFFER_READ, count, ERR, file, NULL, and process_file_get_process().

process_cwd_read()

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

static

Definition at line 147 of file process.c.

References buffer, BUFFER_READ, count, ERR, file, NULL, PATH_DEFER, PATH_EMPTY, path_to_name(), process_file_get_process(), pathname_t::string, strlen(), vfs_ctx_get_cwd(), and process_t::vfsCtx.

process_dir_init()

static uint64_t process_dir_init ( process_t *  process, const char *  name  )

static

Definition at line 281 of file process.c.

References process_t::cmdlineFile, cmdlineOps, process_t::cwdFile, cwdOps, DEREF, process_t::dir, ERR, inodeOps, namespace_bind(), process_t::noteFile, noteOps, NULL, PATH_CREATE, path_put(), process_t::prioFile, prioOps, REF, mount_t::root, process_t::self, sysfs_dir_new(), sysfs_file_new(), process_t::waitFile, and waitOps.

Referenced by process_new(), and process_procfs_init().

process_file_get_process()

static process_t * process_file_get_process ( file_t *  file )

static

Definition at line 72 of file process.c.

References EACCES, EINVAL, errno, file, dentry_t::inode, kernelProcess, LOG_DEBUG, NULL, and inode_t::private.

Referenced by process_cmdline_read(), process_cwd_read(), process_note_write(), process_prio_read(), process_prio_write(), process_wait_poll(), and process_wait_read().

process_free()

static void process_free ( process_t *  process )

static

Definition at line 339 of file process.c.

References process_t::argv, argv_deinit(), assert, atomic_load, process_t::children, process_t::childrenLock, DEREF, process_t::dyingWaitQueue, EXIT_SUCCESS, free(), futex_ctx_deinit(), process_t::futexCtx, process_t::id, process_t::isDying, process_threads_t::list, list_is_empty(), list_remove(), LOG_DEBUG, NULL, panic(), process_t::parent, process_kill(), rwlock_write_acquire(), rwlock_write_release(), RWLOCK_WRITE_SCOPE, process_t::siblingEntry, process_t::space, space_deinit(), process_t::threads, and wait_queue_deinit().

Referenced by process_init().

process_init()

static uint64_t process_init ( process_t *  process, process_t *  parent, const char **  argv, const path_t *  cwd, priority_t  priority  )

static

Definition at line 371 of file process.c.

References process_t::argv, argv_deinit(), argv_init(), assert, atomic_fetch_add, atomic_init, process_t::children, process_t::childrenLock, process_t::cmdlineFile, process_t::cwdFile, process_t::dir, process_t::dyingWaitQueue, ERR, EXIT_SUCCESS, futex_ctx_init(), process_t::futexCtx, process_t::id, process_t::isDying, kernelProcess, process_threads_t::list, list_entry_init(), list_init(), list_push(), process_threads_t::lock, lock_init(), LOG_DEBUG, namespace_deinit(), namespace_init(), process_threads_t::newTid, process_t::noteFile, NULL, process_t::parent, PATH_EMPTY, path_put(), process_t::prioFile, process_free(), process_is_child(), process_t::ref, REF, ref_init(), rwlock_init(), RWLOCK_WRITE_SCOPE, process_t::self, process_t::siblingEntry, process_t::space, space_deinit(), space_init(), SPACE_MAP_IDENTITY, SPACE_MAP_KERNEL_BINARY, SPACE_MAP_KERNEL_HEAP, process_t::threads, vfs_ctx_get_cwd(), vfs_ctx_init(), process_t::vfsCtx, VMM_USER_SPACE_MAX, VMM_USER_SPACE_MIN, wait_queue_init(), process_t::waitFile, and process_t::zombieEntry.

Referenced by process_get_kernel(), and process_new().

process_inode_cleanup()

static void process_inode_cleanup ( inode_t *  inode )

static

Definition at line 271 of file process.c.

References DEREF, and inode_t::private.

process_note_write()

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

static

Definition at line 193 of file process.c.

References buffer, CONTAINER_OF_SAFE, count, EINVAL, ERR, errno, file, process_threads_t::list, list_first(), process_threads_t::lock, LOCK_SCOPE, NULL, process_file_get_process(), thread_send_note(), and process_t::threads.

process_prio_read()

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

static

Definition at line 91 of file process.c.

References atomic_load, buffer, BUFFER_READ, count, ERR, file, MAX_NAME, NULL, process_file_get_process(), and snprintf().

process_prio_write()

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

static

Definition at line 106 of file process.c.

References atoll(), atomic_store, buffer, count, EACCES, EINVAL, ERR, errno, file, MAX_NAME, memcpy(), NULL, PRIORITY_MAX_USER, and process_file_get_process().

process_wait_poll()

static wait_queue_t * process_wait_poll ( file_t *  file, poll_events_t *  revents  )

static

Definition at line 249 of file process.c.

References atomic_load, process_t::dyingWaitQueue, file, process_t::isDying, NULL, POLLIN, and process_file_get_process().

process_wait_read()

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

static

Definition at line 229 of file process.c.

References atomic_load, buffer, BUFFER_READ, count, process_t::dyingWaitQueue, ERR, file, process_t::isDying, MAX_PATH, NULL, process_file_get_process(), snprintf(), and WAIT_BLOCK.

SYSCALL_DEFINE()

SYSCALL_DEFINE	(	SYS_GETPID	,
		pid_t
	)

Definition at line 609 of file process.c.

References process_t::id, and sched_process().

Variable Documentation

cmdlineOps

file_ops_t cmdlineOps

static

Initial value:

= {
    .read = process_cmdline_read,
}

Definition at line 189 of file process.c.

Referenced by process_dir_init().

cwdOps

file_ops_t cwdOps

static

Initial value:

= {
    .read = process_cwd_read,
}

Definition at line 172 of file process.c.

Referenced by process_dir_init().

inodeOps

inode_ops_t inodeOps

static

Initial value:

= {
    .cleanup = process_inode_cleanup,
}

Definition at line 277 of file process.c.

Referenced by process_dir_init().

kernelProcess

process_t kernelProcess

static

Definition at line 28 of file process.c.

Referenced by namespace_bind(), namespace_get_root_path(), namespace_mount(), process_file_get_process(), process_get_kernel(), process_init(), process_procfs_init(), and sysfs_mount_new().

kernelProcessInitalized

bool kernelProcessInitalized = false

static

Definition at line 29 of file process.c.

Referenced by process_get_kernel(), and process_procfs_init().

noteOps

file_ops_t noteOps

static

Initial value:

= {
    .write = process_note_write,
}

Definition at line 225 of file process.c.

Referenced by process_dir_init().

prioOps

file_ops_t prioOps

static

Initial value:

= {
    .read = process_prio_read,
    .write = process_prio_write,
}

Definition at line 142 of file process.c.

Referenced by process_dir_init().

waitOps

file_ops_t waitOps

static

Initial value:

= {
    .read = process_wait_read,
    .poll = process_wait_poll,
}

Definition at line 266 of file process.c.

Referenced by process_dir_init().