4 * Copyright (C) 1991, 1992 Linus Torvalds
7 #include <linux/syscalls.h>
8 #include <linux/init.h>
10 #include <linux/sched/task.h>
12 #include <linux/file.h>
13 #include <linux/fdtable.h>
14 #include <linux/capability.h>
15 #include <linux/dnotify.h>
16 #include <linux/slab.h>
17 #include <linux/module.h>
18 #include <linux/pipe_fs_i.h>
19 #include <linux/security.h>
20 #include <linux/ptrace.h>
21 #include <linux/signal.h>
22 #include <linux/rcupdate.h>
23 #include <linux/pid_namespace.h>
24 #include <linux/user_namespace.h>
25 #include <linux/shmem_fs.h>
26 #include <linux/compat.h>
29 #include <asm/siginfo.h>
30 #include <linux/uaccess.h>
32 #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
34 int setfl(int fd
, struct file
* filp
, unsigned long arg
)
36 struct inode
* inode
= file_inode(filp
);
40 * O_APPEND cannot be cleared if the file is marked as append-only
41 * and the file is open for write.
43 if (((arg
^ filp
->f_flags
) & O_APPEND
) && IS_APPEND(inode
))
46 /* O_NOATIME can only be set by the owner or superuser */
47 if ((arg
& O_NOATIME
) && !(filp
->f_flags
& O_NOATIME
))
48 if (!inode_owner_or_capable(inode
))
51 /* required for strict SunOS emulation */
52 if (O_NONBLOCK
!= O_NDELAY
)
56 /* Pipe packetized mode is controlled by O_DIRECT flag */
57 if (!S_ISFIFO(inode
->i_mode
) && (arg
& O_DIRECT
)) {
58 if (!filp
->f_mapping
|| !filp
->f_mapping
->a_ops
||
59 !filp
->f_mapping
->a_ops
->direct_IO
)
63 if (filp
->f_op
->check_flags
)
64 error
= filp
->f_op
->check_flags(arg
);
65 if (!error
&& filp
->f_op
->setfl
)
66 error
= filp
->f_op
->setfl(filp
, arg
);
71 * ->fasync() is responsible for setting the FASYNC bit.
73 if (((arg
^ filp
->f_flags
) & FASYNC
) && filp
->f_op
->fasync
) {
74 error
= filp
->f_op
->fasync(fd
, filp
, (arg
& FASYNC
) != 0);
80 spin_lock(&filp
->f_lock
);
81 filp
->f_flags
= (arg
& SETFL_MASK
) | (filp
->f_flags
& ~SETFL_MASK
);
82 spin_unlock(&filp
->f_lock
);
87 EXPORT_SYMBOL_GPL(setfl
);
89 static void f_modown(struct file
*filp
, struct pid
*pid
, enum pid_type type
,
92 write_lock_irq(&filp
->f_owner
.lock
);
93 if (force
|| !filp
->f_owner
.pid
) {
94 put_pid(filp
->f_owner
.pid
);
95 filp
->f_owner
.pid
= get_pid(pid
);
96 filp
->f_owner
.pid_type
= type
;
99 const struct cred
*cred
= current_cred();
100 filp
->f_owner
.uid
= cred
->uid
;
101 filp
->f_owner
.euid
= cred
->euid
;
104 write_unlock_irq(&filp
->f_owner
.lock
);
107 void __f_setown(struct file
*filp
, struct pid
*pid
, enum pid_type type
,
110 security_file_set_fowner(filp
);
111 f_modown(filp
, pid
, type
, force
);
113 EXPORT_SYMBOL(__f_setown
);
115 int f_setown(struct file
*filp
, unsigned long arg
, int force
)
118 struct pid
*pid
= NULL
;
119 int who
= arg
, ret
= 0;
123 /* avoid overflow below */
133 pid
= find_vpid(who
);
139 __f_setown(filp
, pid
, type
, force
);
144 EXPORT_SYMBOL(f_setown
);
146 void f_delown(struct file
*filp
)
148 f_modown(filp
, NULL
, PIDTYPE_PID
, 1);
151 pid_t
f_getown(struct file
*filp
)
154 read_lock(&filp
->f_owner
.lock
);
155 pid
= pid_vnr(filp
->f_owner
.pid
);
156 if (filp
->f_owner
.pid_type
== PIDTYPE_PGID
)
158 read_unlock(&filp
->f_owner
.lock
);
162 static int f_setown_ex(struct file
*filp
, unsigned long arg
)
164 struct f_owner_ex __user
*owner_p
= (void __user
*)arg
;
165 struct f_owner_ex owner
;
170 ret
= copy_from_user(&owner
, owner_p
, sizeof(owner
));
174 switch (owner
.type
) {
192 pid
= find_vpid(owner
.pid
);
193 if (owner
.pid
&& !pid
)
196 __f_setown(filp
, pid
, type
, 1);
202 static int f_getown_ex(struct file
*filp
, unsigned long arg
)
204 struct f_owner_ex __user
*owner_p
= (void __user
*)arg
;
205 struct f_owner_ex owner
;
208 read_lock(&filp
->f_owner
.lock
);
209 owner
.pid
= pid_vnr(filp
->f_owner
.pid
);
210 switch (filp
->f_owner
.pid_type
) {
212 owner
.type
= F_OWNER_TID
;
216 owner
.type
= F_OWNER_PID
;
220 owner
.type
= F_OWNER_PGRP
;
228 read_unlock(&filp
->f_owner
.lock
);
231 ret
= copy_to_user(owner_p
, &owner
, sizeof(owner
));
238 #ifdef CONFIG_CHECKPOINT_RESTORE
239 static int f_getowner_uids(struct file
*filp
, unsigned long arg
)
241 struct user_namespace
*user_ns
= current_user_ns();
242 uid_t __user
*dst
= (void __user
*)arg
;
246 read_lock(&filp
->f_owner
.lock
);
247 src
[0] = from_kuid(user_ns
, filp
->f_owner
.uid
);
248 src
[1] = from_kuid(user_ns
, filp
->f_owner
.euid
);
249 read_unlock(&filp
->f_owner
.lock
);
251 err
= put_user(src
[0], &dst
[0]);
252 err
|= put_user(src
[1], &dst
[1]);
257 static int f_getowner_uids(struct file
*filp
, unsigned long arg
)
263 static bool rw_hint_valid(enum rw_hint hint
)
266 case RWF_WRITE_LIFE_NOT_SET
:
267 case RWH_WRITE_LIFE_NONE
:
268 case RWH_WRITE_LIFE_SHORT
:
269 case RWH_WRITE_LIFE_MEDIUM
:
270 case RWH_WRITE_LIFE_LONG
:
271 case RWH_WRITE_LIFE_EXTREME
:
278 static long fcntl_rw_hint(struct file
*file
, unsigned int cmd
,
281 struct inode
*inode
= file_inode(file
);
282 u64
*argp
= (u64 __user
*)arg
;
287 case F_GET_FILE_RW_HINT
:
288 h
= file_write_hint(file
);
289 if (copy_to_user(argp
, &h
, sizeof(*argp
)))
292 case F_SET_FILE_RW_HINT
:
293 if (copy_from_user(&h
, argp
, sizeof(h
)))
295 hint
= (enum rw_hint
) h
;
296 if (!rw_hint_valid(hint
))
299 spin_lock(&file
->f_lock
);
300 file
->f_write_hint
= hint
;
301 spin_unlock(&file
->f_lock
);
304 h
= inode
->i_write_hint
;
305 if (copy_to_user(argp
, &h
, sizeof(*argp
)))
309 if (copy_from_user(&h
, argp
, sizeof(h
)))
311 hint
= (enum rw_hint
) h
;
312 if (!rw_hint_valid(hint
))
316 inode
->i_write_hint
= hint
;
324 static long do_fcntl(int fd
, unsigned int cmd
, unsigned long arg
,
327 void __user
*argp
= (void __user
*)arg
;
333 err
= f_dupfd(arg
, filp
, 0);
335 case F_DUPFD_CLOEXEC
:
336 err
= f_dupfd(arg
, filp
, O_CLOEXEC
);
339 err
= get_close_on_exec(fd
) ? FD_CLOEXEC
: 0;
343 set_close_on_exec(fd
, arg
& FD_CLOEXEC
);
349 err
= setfl(fd
, filp
, arg
);
351 #if BITS_PER_LONG != 32
352 /* 32-bit arches must use fcntl64() */
356 if (copy_from_user(&flock
, argp
, sizeof(flock
)))
358 err
= fcntl_getlk(filp
, cmd
, &flock
);
359 if (!err
&& copy_to_user(argp
, &flock
, sizeof(flock
)))
362 #if BITS_PER_LONG != 32
363 /* 32-bit arches must use fcntl64() */
370 if (copy_from_user(&flock
, argp
, sizeof(flock
)))
372 err
= fcntl_setlk(fd
, filp
, cmd
, &flock
);
376 * XXX If f_owner is a process group, the
377 * negative return value will get converted
378 * into an error. Oops. If we keep the
379 * current syscall conventions, the only way
380 * to fix this will be in libc.
382 err
= f_getown(filp
);
383 force_successful_syscall_return();
386 err
= f_setown(filp
, arg
, 1);
389 err
= f_getown_ex(filp
, arg
);
392 err
= f_setown_ex(filp
, arg
);
394 case F_GETOWNER_UIDS
:
395 err
= f_getowner_uids(filp
, arg
);
398 err
= filp
->f_owner
.signum
;
401 /* arg == 0 restores default behaviour. */
402 if (!valid_signal(arg
)) {
406 filp
->f_owner
.signum
= arg
;
409 err
= fcntl_getlease(filp
);
412 err
= fcntl_setlease(fd
, filp
, arg
);
415 err
= fcntl_dirnotify(fd
, filp
, arg
);
419 err
= pipe_fcntl(filp
, cmd
, arg
);
423 err
= shmem_fcntl(filp
, cmd
, arg
);
427 case F_GET_FILE_RW_HINT
:
428 case F_SET_FILE_RW_HINT
:
429 err
= fcntl_rw_hint(filp
, cmd
, arg
);
437 static int check_fcntl_cmd(unsigned cmd
)
441 case F_DUPFD_CLOEXEC
:
450 SYSCALL_DEFINE3(fcntl
, unsigned int, fd
, unsigned int, cmd
, unsigned long, arg
)
452 struct fd f
= fdget_raw(fd
);
458 if (unlikely(f
.file
->f_mode
& FMODE_PATH
)) {
459 if (!check_fcntl_cmd(cmd
))
463 err
= security_file_fcntl(f
.file
, cmd
, arg
);
465 err
= do_fcntl(fd
, cmd
, arg
, f
.file
);
473 #if BITS_PER_LONG == 32
474 SYSCALL_DEFINE3(fcntl64
, unsigned int, fd
, unsigned int, cmd
,
477 void __user
*argp
= (void __user
*)arg
;
478 struct fd f
= fdget_raw(fd
);
479 struct flock64 flock
;
485 if (unlikely(f
.file
->f_mode
& FMODE_PATH
)) {
486 if (!check_fcntl_cmd(cmd
))
490 err
= security_file_fcntl(f
.file
, cmd
, arg
);
498 if (copy_from_user(&flock
, argp
, sizeof(flock
)))
500 err
= fcntl_getlk64(f
.file
, cmd
, &flock
);
501 if (!err
&& copy_to_user(argp
, &flock
, sizeof(flock
)))
509 if (copy_from_user(&flock
, argp
, sizeof(flock
)))
511 err
= fcntl_setlk64(fd
, f
.file
, cmd
, &flock
);
514 err
= do_fcntl(fd
, cmd
, arg
, f
.file
);
525 /* careful - don't use anywhere else */
526 #define copy_flock_fields(dst, src) \
527 (dst)->l_type = (src)->l_type; \
528 (dst)->l_whence = (src)->l_whence; \
529 (dst)->l_start = (src)->l_start; \
530 (dst)->l_len = (src)->l_len; \
531 (dst)->l_pid = (src)->l_pid;
533 static int get_compat_flock(struct flock
*kfl
, const struct compat_flock __user
*ufl
)
535 struct compat_flock fl
;
537 if (copy_from_user(&fl
, ufl
, sizeof(struct compat_flock
)))
539 copy_flock_fields(kfl
, &fl
);
543 static int get_compat_flock64(struct flock
*kfl
, const struct compat_flock64 __user
*ufl
)
545 struct compat_flock64 fl
;
547 if (copy_from_user(&fl
, ufl
, sizeof(struct compat_flock64
)))
549 copy_flock_fields(kfl
, &fl
);
553 static int put_compat_flock(const struct flock
*kfl
, struct compat_flock __user
*ufl
)
555 struct compat_flock fl
;
557 memset(&fl
, 0, sizeof(struct compat_flock
));
558 copy_flock_fields(&fl
, kfl
);
559 if (copy_to_user(ufl
, &fl
, sizeof(struct compat_flock
)))
564 static int put_compat_flock64(const struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
566 struct compat_flock64 fl
;
568 memset(&fl
, 0, sizeof(struct compat_flock64
));
569 copy_flock_fields(&fl
, kfl
);
570 if (copy_to_user(ufl
, &fl
, sizeof(struct compat_flock64
)))
574 #undef copy_flock_fields
577 convert_fcntl_cmd(unsigned int cmd
)
592 * GETLK was successful and we need to return the data, but it needs to fit in
593 * the compat structure.
594 * l_start shouldn't be too big, unless the original start + end is greater than
595 * COMPAT_OFF_T_MAX, in which case the app was asking for trouble, so we return
596 * -EOVERFLOW in that case. l_len could be too big, in which case we just
597 * truncate it, and only allow the app to see that part of the conflicting lock
598 * that might make sense to it anyway
600 static int fixup_compat_flock(struct flock
*flock
)
602 if (flock
->l_start
> COMPAT_OFF_T_MAX
)
604 if (flock
->l_len
> COMPAT_OFF_T_MAX
)
605 flock
->l_len
= COMPAT_OFF_T_MAX
;
609 COMPAT_SYSCALL_DEFINE3(fcntl64
, unsigned int, fd
, unsigned int, cmd
,
612 struct fd f
= fdget_raw(fd
);
619 if (unlikely(f
.file
->f_mode
& FMODE_PATH
)) {
620 if (!check_fcntl_cmd(cmd
))
624 err
= security_file_fcntl(f
.file
, cmd
, arg
);
630 err
= get_compat_flock(&flock
, compat_ptr(arg
));
633 err
= fcntl_getlk(f
.file
, convert_fcntl_cmd(cmd
), &flock
);
636 err
= fixup_compat_flock(&flock
);
639 err
= put_compat_flock(&flock
, compat_ptr(arg
));
643 err
= get_compat_flock64(&flock
, compat_ptr(arg
));
646 err
= fcntl_getlk(f
.file
, convert_fcntl_cmd(cmd
), &flock
);
649 err
= fixup_compat_flock(&flock
);
652 err
= put_compat_flock64(&flock
, compat_ptr(arg
));
656 err
= get_compat_flock(&flock
, compat_ptr(arg
));
659 err
= fcntl_setlk(fd
, f
.file
, convert_fcntl_cmd(cmd
), &flock
);
665 err
= get_compat_flock64(&flock
, compat_ptr(arg
));
668 err
= fcntl_setlk(fd
, f
.file
, convert_fcntl_cmd(cmd
), &flock
);
671 err
= do_fcntl(fd
, cmd
, arg
, f
.file
);
679 COMPAT_SYSCALL_DEFINE3(fcntl
, unsigned int, fd
, unsigned int, cmd
,
691 return compat_sys_fcntl64(fd
, cmd
, arg
);
695 /* Table to convert sigio signal codes into poll band bitmaps */
697 static const long band_table
[NSIGPOLL
] = {
698 POLLIN
| POLLRDNORM
, /* POLL_IN */
699 POLLOUT
| POLLWRNORM
| POLLWRBAND
, /* POLL_OUT */
700 POLLIN
| POLLRDNORM
| POLLMSG
, /* POLL_MSG */
701 POLLERR
, /* POLL_ERR */
702 POLLPRI
| POLLRDBAND
, /* POLL_PRI */
703 POLLHUP
| POLLERR
/* POLL_HUP */
706 static inline int sigio_perm(struct task_struct
*p
,
707 struct fown_struct
*fown
, int sig
)
709 const struct cred
*cred
;
713 cred
= __task_cred(p
);
714 ret
= ((uid_eq(fown
->euid
, GLOBAL_ROOT_UID
) ||
715 uid_eq(fown
->euid
, cred
->suid
) || uid_eq(fown
->euid
, cred
->uid
) ||
716 uid_eq(fown
->uid
, cred
->suid
) || uid_eq(fown
->uid
, cred
->uid
)) &&
717 !security_file_send_sigiotask(p
, fown
, sig
));
722 static void send_sigio_to_task(struct task_struct
*p
,
723 struct fown_struct
*fown
,
724 int fd
, int reason
, int group
)
727 * F_SETSIG can change ->signum lockless in parallel, make
728 * sure we read it once and use the same value throughout.
730 int signum
= ACCESS_ONCE(fown
->signum
);
732 if (!sigio_perm(p
, fown
, signum
))
738 /* Queue a rt signal with the appropriate fd as its
739 value. We use SI_SIGIO as the source, not
740 SI_KERNEL, since kernel signals always get
741 delivered even if we can't queue. Failure to
742 queue in this case _should_ be reported; we fall
743 back to SIGIO in that case. --sct */
744 si
.si_signo
= signum
;
747 /* Make sure we are called with one of the POLL_*
748 reasons, otherwise we could leak kernel stack into
750 BUG_ON((reason
& __SI_MASK
) != __SI_POLL
);
751 if (reason
- POLL_IN
>= NSIGPOLL
)
754 si
.si_band
= band_table
[reason
- POLL_IN
];
756 if (!do_send_sig_info(signum
, &si
, p
, group
))
758 /* fall-through: fall back on the old plain SIGIO signal */
760 do_send_sig_info(SIGIO
, SEND_SIG_PRIV
, p
, group
);
764 void send_sigio(struct fown_struct
*fown
, int fd
, int band
)
766 struct task_struct
*p
;
771 read_lock(&fown
->lock
);
773 type
= fown
->pid_type
;
774 if (type
== PIDTYPE_MAX
) {
781 goto out_unlock_fown
;
783 read_lock(&tasklist_lock
);
784 do_each_pid_task(pid
, type
, p
) {
785 send_sigio_to_task(p
, fown
, fd
, band
, group
);
786 } while_each_pid_task(pid
, type
, p
);
787 read_unlock(&tasklist_lock
);
789 read_unlock(&fown
->lock
);
792 static void send_sigurg_to_task(struct task_struct
*p
,
793 struct fown_struct
*fown
, int group
)
795 if (sigio_perm(p
, fown
, SIGURG
))
796 do_send_sig_info(SIGURG
, SEND_SIG_PRIV
, p
, group
);
799 int send_sigurg(struct fown_struct
*fown
)
801 struct task_struct
*p
;
807 read_lock(&fown
->lock
);
809 type
= fown
->pid_type
;
810 if (type
== PIDTYPE_MAX
) {
817 goto out_unlock_fown
;
821 read_lock(&tasklist_lock
);
822 do_each_pid_task(pid
, type
, p
) {
823 send_sigurg_to_task(p
, fown
, group
);
824 } while_each_pid_task(pid
, type
, p
);
825 read_unlock(&tasklist_lock
);
827 read_unlock(&fown
->lock
);
831 static DEFINE_SPINLOCK(fasync_lock
);
832 static struct kmem_cache
*fasync_cache __read_mostly
;
834 static void fasync_free_rcu(struct rcu_head
*head
)
836 kmem_cache_free(fasync_cache
,
837 container_of(head
, struct fasync_struct
, fa_rcu
));
841 * Remove a fasync entry. If successfully removed, return
842 * positive and clear the FASYNC flag. If no entry exists,
843 * do nothing and return 0.
845 * NOTE! It is very important that the FASYNC flag always
846 * match the state "is the filp on a fasync list".
849 int fasync_remove_entry(struct file
*filp
, struct fasync_struct
**fapp
)
851 struct fasync_struct
*fa
, **fp
;
854 spin_lock(&filp
->f_lock
);
855 spin_lock(&fasync_lock
);
856 for (fp
= fapp
; (fa
= *fp
) != NULL
; fp
= &fa
->fa_next
) {
857 if (fa
->fa_file
!= filp
)
860 spin_lock_irq(&fa
->fa_lock
);
862 spin_unlock_irq(&fa
->fa_lock
);
865 call_rcu(&fa
->fa_rcu
, fasync_free_rcu
);
866 filp
->f_flags
&= ~FASYNC
;
870 spin_unlock(&fasync_lock
);
871 spin_unlock(&filp
->f_lock
);
875 struct fasync_struct
*fasync_alloc(void)
877 return kmem_cache_alloc(fasync_cache
, GFP_KERNEL
);
881 * NOTE! This can be used only for unused fasync entries:
882 * entries that actually got inserted on the fasync list
883 * need to be released by rcu - see fasync_remove_entry.
885 void fasync_free(struct fasync_struct
*new)
887 kmem_cache_free(fasync_cache
, new);
891 * Insert a new entry into the fasync list. Return the pointer to the
892 * old one if we didn't use the new one.
894 * NOTE! It is very important that the FASYNC flag always
895 * match the state "is the filp on a fasync list".
897 struct fasync_struct
*fasync_insert_entry(int fd
, struct file
*filp
, struct fasync_struct
**fapp
, struct fasync_struct
*new)
899 struct fasync_struct
*fa
, **fp
;
901 spin_lock(&filp
->f_lock
);
902 spin_lock(&fasync_lock
);
903 for (fp
= fapp
; (fa
= *fp
) != NULL
; fp
= &fa
->fa_next
) {
904 if (fa
->fa_file
!= filp
)
907 spin_lock_irq(&fa
->fa_lock
);
909 spin_unlock_irq(&fa
->fa_lock
);
913 spin_lock_init(&new->fa_lock
);
914 new->magic
= FASYNC_MAGIC
;
917 new->fa_next
= *fapp
;
918 rcu_assign_pointer(*fapp
, new);
919 filp
->f_flags
|= FASYNC
;
922 spin_unlock(&fasync_lock
);
923 spin_unlock(&filp
->f_lock
);
928 * Add a fasync entry. Return negative on error, positive if
929 * added, and zero if did nothing but change an existing one.
931 static int fasync_add_entry(int fd
, struct file
*filp
, struct fasync_struct
**fapp
)
933 struct fasync_struct
*new;
935 new = fasync_alloc();
940 * fasync_insert_entry() returns the old (update) entry if
943 * So free the (unused) new entry and return 0 to let the
944 * caller know that we didn't add any new fasync entries.
946 if (fasync_insert_entry(fd
, filp
, fapp
, new)) {
955 * fasync_helper() is used by almost all character device drivers
956 * to set up the fasync queue, and for regular files by the file
957 * lease code. It returns negative on error, 0 if it did no changes
958 * and positive if it added/deleted the entry.
960 int fasync_helper(int fd
, struct file
* filp
, int on
, struct fasync_struct
**fapp
)
963 return fasync_remove_entry(filp
, fapp
);
964 return fasync_add_entry(fd
, filp
, fapp
);
967 EXPORT_SYMBOL(fasync_helper
);
970 * rcu_read_lock() is held
972 static void kill_fasync_rcu(struct fasync_struct
*fa
, int sig
, int band
)
975 struct fown_struct
*fown
;
978 if (fa
->magic
!= FASYNC_MAGIC
) {
979 printk(KERN_ERR
"kill_fasync: bad magic number in "
983 spin_lock_irqsave(&fa
->fa_lock
, flags
);
985 fown
= &fa
->fa_file
->f_owner
;
986 /* Don't send SIGURG to processes which have not set a
987 queued signum: SIGURG has its own default signalling
989 if (!(sig
== SIGURG
&& fown
->signum
== 0))
990 send_sigio(fown
, fa
->fa_fd
, band
);
992 spin_unlock_irqrestore(&fa
->fa_lock
, flags
);
993 fa
= rcu_dereference(fa
->fa_next
);
997 void kill_fasync(struct fasync_struct
**fp
, int sig
, int band
)
999 /* First a quick test without locking: usually
1000 * the list is empty.
1004 kill_fasync_rcu(rcu_dereference(*fp
), sig
, band
);
1008 EXPORT_SYMBOL(kill_fasync
);
1010 static int __init
fcntl_init(void)
1013 * Please add new bits here to ensure allocation uniqueness.
1014 * Exceptions: O_NONBLOCK is a two bit define on parisc; O_NDELAY
1015 * is defined as O_NONBLOCK on some platforms and not on others.
1017 BUILD_BUG_ON(21 - 1 /* for O_RDONLY being 0 */ !=
1019 (VALID_OPEN_FLAGS
& ~(O_NONBLOCK
| O_NDELAY
)) |
1020 __FMODE_EXEC
| __FMODE_NONOTIFY
));
1022 fasync_cache
= kmem_cache_create("fasync_cache",
1023 sizeof(struct fasync_struct
), 0, SLAB_PANIC
, NULL
);
1027 module_init(fcntl_init
)