mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-16 11:52:34 +03:00
99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
#ifndef _LINUX_FS_H
|
|
#define _LINUX_FS_H
|
|
#include <linux/list.h>
|
|
#include <linux/bug.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/rwsem.h>
|
|
#define MAY_EXEC 0x00000001
|
|
#define MAY_WRITE 0x00000002
|
|
#define MAY_READ 0x00000004
|
|
#define MAY_APPEND 0x00000008
|
|
#define MAY_ACCESS 0x00000010
|
|
#define MAY_OPEN 0x00000020
|
|
#define MAY_CHDIR 0x00000040
|
|
/* called from RCU mode, don't block */
|
|
#define MAY_NOT_BLOCK 0x00000080
|
|
/*
|
|
* Attribute flags. These should be or-ed together to figure out what
|
|
* has been changed!
|
|
*/
|
|
#define ATTR_MODE (1 << 0)
|
|
#define ATTR_UID (1 << 1)
|
|
#define ATTR_GID (1 << 2)
|
|
#define ATTR_SIZE (1 << 3)
|
|
#define ATTR_ATIME (1 << 4)
|
|
#define ATTR_MTIME (1 << 5)
|
|
#define ATTR_CTIME (1 << 6)
|
|
#define ATTR_ATIME_SET (1 << 7)
|
|
#define ATTR_MTIME_SET (1 << 8)
|
|
#define ATTR_FORCE (1 << 9) /* Not a change, but a change it */
|
|
#define ATTR_ATTR_FLAG (1 << 10)
|
|
#define ATTR_KILL_SUID (1 << 11)
|
|
#define ATTR_KILL_SGID (1 << 12)
|
|
#define ATTR_FILE (1 << 13)
|
|
#define ATTR_KILL_PRIV (1 << 14)
|
|
#define ATTR_OPEN (1 << 15) /* Truncating from open(O_TRUNC) */
|
|
#define ATTR_TIMES_SET (1 << 16)
|
|
/*
|
|
* inode->i_mutex nesting subclasses for the lock validator:
|
|
*
|
|
* 0: the object of the current VFS operation
|
|
* 1: parent
|
|
* 2: child/target
|
|
* 3: xattr
|
|
* 4: second non-directory
|
|
* 5: second parent (when locking independent directories in rename)
|
|
*
|
|
* I_MUTEX_NONDIR2 is for certain operations (such as rename) which lock two
|
|
* non-directories at once.
|
|
*
|
|
* The locking order between these classes is
|
|
* parent[2] -> child -> grandchild -> normal -> xattr -> second non-directory
|
|
*/
|
|
enum inode_i_mutex_lock_class
|
|
{
|
|
I_MUTEX_NORMAL,
|
|
I_MUTEX_PARENT,
|
|
I_MUTEX_CHILD,
|
|
I_MUTEX_XATTR,
|
|
I_MUTEX_NONDIR2,
|
|
I_MUTEX_PARENT2,
|
|
};
|
|
struct file {
|
|
|
|
/*
|
|
* Protects f_ep_links, f_flags.
|
|
* Must not be taken from IRQ context.
|
|
*/
|
|
spinlock_t f_lock;
|
|
atomic_long_t f_count;
|
|
unsigned int f_flags;
|
|
fmode_t f_mode;
|
|
|
|
/* needed for tty driver, and maybe others */
|
|
void *private_data;
|
|
|
|
struct page **pages; /* physical memory backend */
|
|
unsigned int count;
|
|
unsigned int allocated;
|
|
void *vma;
|
|
|
|
} __attribute__((aligned(4))); /* lest something weird decides that 2 is OK */
|
|
#define get_file_rcu(x) atomic_long_inc_not_zero(&(x)->f_count)
|
|
#define fput_atomic(x) atomic_long_add_unless(&(x)->f_count, -1, 1)
|
|
#define file_count(x) atomic_long_read(&(x)->f_count)
|
|
#define FL_POSIX 1
|
|
#define FL_FLOCK 2
|
|
#define FL_DELEG 4 /* NFSv4 delegation */
|
|
#define FL_ACCESS 8 /* not trying to lock, just looking */
|
|
#define FL_EXISTS 16 /* when unlocking, test for existence */
|
|
#define FL_LEASE 32 /* lease held on this file */
|
|
#define FL_CLOSE 64 /* unlock on close */
|
|
#define FL_SLEEP 128 /* A blocking lock */
|
|
#define FL_DOWNGRADE_PENDING 256 /* Lease is being downgraded */
|
|
#define FL_UNLOCK_PENDING 512 /* Lease is being broken */
|
|
#define FL_OFDLCK 1024 /* lock is "owned" by struct file */
|
|
#define FL_LAYOUT 2048 /* outstanding pNFS layout */
|
|
struct inode;
|
|
#endif /* _LINUX_FS_H */
|