author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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#ifndef _LINUX_POLL_H |
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#define _LINUX_POLL_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <asm/poll.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifdef __KERNEL__ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#include <linux/compiler.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/wait.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/string.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/fs.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/sched.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <asm/uaccess.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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/* ~832 bytes of stack space used max in sys_select/sys_poll before allocating |
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additional memory. */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define MAX_STACK_ALLOC 832 |
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#define FRONTEND_STACK_ALLOC 256 |
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#define SELECT_STACK_ALLOC FRONTEND_STACK_ALLOC |
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#define POLL_STACK_ALLOC FRONTEND_STACK_ALLOC |
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#define WQUEUES_STACK_ALLOC (MAX_STACK_ALLOC - FRONTEND_STACK_ALLOC) |
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#define N_INLINE_POLL_ENTRIES (WQUEUES_STACK_ALLOC / sizeof(struct poll_table_entry)) |
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|
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#define DEFAULT_POLLMASK (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM) |
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|
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struct poll_table_struct; |
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|
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/* |
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* structures and helpers for f_op->poll implementations |
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*/ |
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typedef void (*poll_queue_proc)(struct file *, wait_queue_head_t *, struct poll_table_struct *); |
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|
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typedef struct poll_table_struct { |
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poll_queue_proc qproc; |
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} poll_table; |
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|
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static inline void poll_wait(struct file * filp, wait_queue_head_t * wait_address, poll_table *p) |
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{ |
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if (p && wait_address) |
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p->qproc(filp, wait_address, p); |
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} |
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|
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static inline void init_poll_funcptr(poll_table *pt, poll_queue_proc qproc) |
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{ |
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pt->qproc = qproc; |
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} |
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|
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struct poll_table_entry { |
2 | 49 |
struct file *filp; |
0
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wait_queue_t wait; |
2 | 51 |
wait_queue_head_t *wait_address; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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}; |
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|
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/* |
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* Structures and helpers for sys_poll/sys_poll |
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*/ |
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struct poll_wqueues { |
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poll_table pt; |
2 | 59 |
struct poll_table_page *table; |
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struct task_struct *polling_task; |
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int triggered; |
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int error; |
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int inline_index; |
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struct poll_table_entry inline_entries[N_INLINE_POLL_ENTRIES]; |
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}; |
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|
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extern void poll_initwait(struct poll_wqueues *pwq); |
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extern void poll_freewait(struct poll_wqueues *pwq); |
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extern int poll_schedule_timeout(struct poll_wqueues *pwq, int state, |
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ktime_t *expires, unsigned long slack); |
|
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||
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static inline int poll_schedule(struct poll_wqueues *pwq, int state) |
|
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{ |
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return poll_schedule_timeout(pwq, state, NULL, 0); |
|
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} |
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|
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/* |
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* Scaleable version of the fd_set. |
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*/ |
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typedef struct { |
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unsigned long *in, *out, *ex; |
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unsigned long *res_in, *res_out, *res_ex; |
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} fd_set_bits; |
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|
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/* |
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* How many longwords for "nr" bits? |
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*/ |
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#define FDS_BITPERLONG (8*sizeof(long)) |
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#define FDS_LONGS(nr) (((nr)+FDS_BITPERLONG-1)/FDS_BITPERLONG) |
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#define FDS_BYTES(nr) (FDS_LONGS(nr)*sizeof(long)) |
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|
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/* |
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* We do a VERIFY_WRITE here even though we are only reading this time: |
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* we'll write to it eventually.. |
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* |
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* Use "unsigned long" accesses to let user-mode fd_set's be long-aligned. |
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*/ |
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static inline |
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int get_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset) |
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{ |
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nr = FDS_BYTES(nr); |
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if (ufdset) |
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return copy_from_user(fdset, ufdset, nr) ? -EFAULT : 0; |
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105 |
|
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memset(fdset, 0, nr); |
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return 0; |
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108 |
} |
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109 |
|
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static inline unsigned long __must_check |
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set_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset) |
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{ |
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if (ufdset) |
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return __copy_to_user(ufdset, fdset, FDS_BYTES(nr)); |
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return 0; |
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116 |
} |
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|
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static inline |
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void zero_fd_set(unsigned long nr, unsigned long *fdset) |
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{ |
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memset(fdset, 0, FDS_BYTES(nr)); |
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} |
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#define MAX_INT64_SECONDS (((s64)(~((u64)0)>>1)/HZ)-1) |
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extern int do_select(int n, fd_set_bits *fds, struct timespec *end_time); |
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extern int do_sys_poll(struct pollfd __user * ufds, unsigned int nfds, |
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struct timespec *end_time); |
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extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp, |
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fd_set __user *exp, struct timespec *end_time); |
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extern int poll_select_set_timeout(struct timespec *to, long sec, long nsec); |
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#endif /* KERNEL */ |
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#endif /* _LINUX_POLL_H */ |