diff options
Diffstat (limited to 'include/linux/aio.h')
| -rw-r--r-- | include/linux/aio.h | 70 |
1 files changed, 1 insertions, 69 deletions
diff --git a/include/linux/aio.h b/include/linux/aio.h index d9c92daa3944..9eb42dbc5582 100644 --- a/include/linux/aio.h +++ b/include/linux/aio.h | |||
| @@ -1,86 +1,23 @@ | |||
| 1 | #ifndef __LINUX__AIO_H | 1 | #ifndef __LINUX__AIO_H |
| 2 | #define __LINUX__AIO_H | 2 | #define __LINUX__AIO_H |
| 3 | 3 | ||
| 4 | #include <linux/list.h> | ||
| 5 | #include <linux/workqueue.h> | ||
| 6 | #include <linux/aio_abi.h> | 4 | #include <linux/aio_abi.h> |
| 7 | #include <linux/uio.h> | ||
| 8 | #include <linux/rcupdate.h> | ||
| 9 | |||
| 10 | #include <linux/atomic.h> | ||
| 11 | 5 | ||
| 12 | struct kioctx; | 6 | struct kioctx; |
| 13 | struct kiocb; | 7 | struct kiocb; |
| 8 | struct mm_struct; | ||
| 14 | 9 | ||
| 15 | #define KIOCB_KEY 0 | 10 | #define KIOCB_KEY 0 |
| 16 | 11 | ||
| 17 | /* | ||
| 18 | * We use ki_cancel == KIOCB_CANCELLED to indicate that a kiocb has been either | ||
| 19 | * cancelled or completed (this makes a certain amount of sense because | ||
| 20 | * successful cancellation - io_cancel() - does deliver the completion to | ||
| 21 | * userspace). | ||
| 22 | * | ||
| 23 | * And since most things don't implement kiocb cancellation and we'd really like | ||
| 24 | * kiocb completion to be lockless when possible, we use ki_cancel to | ||
| 25 | * synchronize cancellation and completion - we only set it to KIOCB_CANCELLED | ||
| 26 | * with xchg() or cmpxchg(), see batch_complete_aio() and kiocb_cancel(). | ||
| 27 | */ | ||
| 28 | #define KIOCB_CANCELLED ((void *) (~0ULL)) | ||
| 29 | |||
| 30 | typedef int (kiocb_cancel_fn)(struct kiocb *); | 12 | typedef int (kiocb_cancel_fn)(struct kiocb *); |
| 31 | 13 | ||
| 32 | struct kiocb { | ||
| 33 | struct file *ki_filp; | ||
| 34 | struct kioctx *ki_ctx; /* NULL for sync ops */ | ||
| 35 | kiocb_cancel_fn *ki_cancel; | ||
| 36 | void *private; | ||
| 37 | |||
| 38 | union { | ||
| 39 | void __user *user; | ||
| 40 | struct task_struct *tsk; | ||
| 41 | } ki_obj; | ||
| 42 | |||
| 43 | __u64 ki_user_data; /* user's data for completion */ | ||
| 44 | loff_t ki_pos; | ||
| 45 | size_t ki_nbytes; /* copy of iocb->aio_nbytes */ | ||
| 46 | |||
| 47 | struct list_head ki_list; /* the aio core uses this | ||
| 48 | * for cancellation */ | ||
| 49 | |||
| 50 | /* | ||
| 51 | * If the aio_resfd field of the userspace iocb is not zero, | ||
| 52 | * this is the underlying eventfd context to deliver events to. | ||
| 53 | */ | ||
| 54 | struct eventfd_ctx *ki_eventfd; | ||
| 55 | }; | ||
| 56 | |||
| 57 | static inline bool is_sync_kiocb(struct kiocb *kiocb) | ||
| 58 | { | ||
| 59 | return kiocb->ki_ctx == NULL; | ||
| 60 | } | ||
| 61 | |||
| 62 | static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp) | ||
| 63 | { | ||
| 64 | *kiocb = (struct kiocb) { | ||
| 65 | .ki_ctx = NULL, | ||
| 66 | .ki_filp = filp, | ||
| 67 | .ki_obj.tsk = current, | ||
| 68 | }; | ||
| 69 | } | ||
| 70 | |||
| 71 | /* prototypes */ | 14 | /* prototypes */ |
| 72 | #ifdef CONFIG_AIO | 15 | #ifdef CONFIG_AIO |
| 73 | extern ssize_t wait_on_sync_kiocb(struct kiocb *iocb); | ||
| 74 | extern void aio_complete(struct kiocb *iocb, long res, long res2); | ||
| 75 | struct mm_struct; | ||
| 76 | extern void exit_aio(struct mm_struct *mm); | 16 | extern void exit_aio(struct mm_struct *mm); |
| 77 | extern long do_io_submit(aio_context_t ctx_id, long nr, | 17 | extern long do_io_submit(aio_context_t ctx_id, long nr, |
| 78 | struct iocb __user *__user *iocbpp, bool compat); | 18 | struct iocb __user *__user *iocbpp, bool compat); |
| 79 | void kiocb_set_cancel_fn(struct kiocb *req, kiocb_cancel_fn *cancel); | 19 | void kiocb_set_cancel_fn(struct kiocb *req, kiocb_cancel_fn *cancel); |
| 80 | #else | 20 | #else |
| 81 | static inline ssize_t wait_on_sync_kiocb(struct kiocb *iocb) { return 0; } | ||
| 82 | static inline void aio_complete(struct kiocb *iocb, long res, long res2) { } | ||
| 83 | struct mm_struct; | ||
| 84 | static inline void exit_aio(struct mm_struct *mm) { } | 21 | static inline void exit_aio(struct mm_struct *mm) { } |
| 85 | static inline long do_io_submit(aio_context_t ctx_id, long nr, | 22 | static inline long do_io_submit(aio_context_t ctx_id, long nr, |
| 86 | struct iocb __user * __user *iocbpp, | 23 | struct iocb __user * __user *iocbpp, |
| @@ -89,11 +26,6 @@ static inline void kiocb_set_cancel_fn(struct kiocb *req, | |||
| 89 | kiocb_cancel_fn *cancel) { } | 26 | kiocb_cancel_fn *cancel) { } |
| 90 | #endif /* CONFIG_AIO */ | 27 | #endif /* CONFIG_AIO */ |
| 91 | 28 | ||
| 92 | static inline struct kiocb *list_kiocb(struct list_head *h) | ||
| 93 | { | ||
| 94 | return list_entry(h, struct kiocb, ki_list); | ||
| 95 | } | ||
| 96 | |||
| 97 | /* for sysctl: */ | 29 | /* for sysctl: */ |
| 98 | extern unsigned long aio_nr; | 30 | extern unsigned long aio_nr; |
| 99 | extern unsigned long aio_max_nr; | 31 | extern unsigned long aio_max_nr; |
