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17a527cb0f
Provide spl_kthread_create() as a wrapper to the kernel's kthread_create() to provide pre-3.13 semantics. Re-try if the call is interrupted or if it would have returned -ENOMEM. Otherwise return NULL. Signed-off-by: Chunwei Chen <tuxoko@gmail.com> Signed-off-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #339
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://zfsonlinux.org/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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\*****************************************************************************/
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#ifndef _SPL_THREAD_H
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#define _SPL_THREAD_H
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/spinlock.h>
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#include <linux/kthread.h>
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#include <sys/types.h>
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#include <sys/sysmacros.h>
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#include <sys/tsd.h>
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/*
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* Thread interfaces
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*/
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#define TP_MAGIC 0x53535353
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#define TS_SLEEP TASK_INTERRUPTIBLE
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#define TS_RUN TASK_RUNNING
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#define TS_ZOMB EXIT_ZOMBIE
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#define TS_STOPPED TASK_STOPPED
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typedef void (*thread_func_t)(void *);
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#define thread_create(stk, stksize, func, arg, len, pp, state, pri) \
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__thread_create(stk, stksize, (thread_func_t)func, \
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#func, arg, len, pp, state, pri)
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#define thread_exit() __thread_exit()
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#define thread_join(t) VERIFY(0)
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#define curthread current
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#define getcomm() current->comm
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#define getpid() current->pid
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extern kthread_t *__thread_create(caddr_t stk, size_t stksize,
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thread_func_t func, const char *name,
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void *args, size_t len, proc_t *pp,
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int state, pri_t pri);
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extern void __thread_exit(void);
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/*
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* spl_kthread_create - Wrapper providing pre-3.13 semantics for
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* kthread_create() in which it is not killable and less likely
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* to return -ENOMEM.
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*/
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static inline struct task_struct *
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spl_kthread_create(int (*func)(void *), void *data, const char namefmt[], ...)
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{
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struct task_struct *tsk;
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va_list args;
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va_start(args, namefmt);
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do {
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tsk = kthread_create_on_node(func, data,
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-1, namefmt, args);
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if (IS_ERR(tsk)) {
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if (signal_pending(current)) {
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clear_thread_flag(TIF_SIGPENDING);
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continue;
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}
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if (PTR_ERR(tsk) == -ENOMEM)
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continue;
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return (NULL);
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} else
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return (tsk);
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} while (1);
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}
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#endif /* _SPL_THREAD_H */
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