+++ /dev/null
-/*
- * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
- * Copyright (C) 2007 The Regents of the University of California.
- * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
- * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
- * UCRL-CODE-235197
- *
- * This file is part of the SPL, Solaris Porting Layer.
- * For details, see <http://zfsonlinux.org/>.
- *
- * The SPL is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * The SPL is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with the SPL. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef _SPL_KMEM_H
-#define _SPL_KMEM_H
-
-#include <sys/debug.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-
-extern int kmem_debugging(void);
-extern char *kmem_vasprintf(const char *fmt, va_list ap);
-extern char *kmem_asprintf(const char *fmt, ...);
-extern char *strdup(const char *str);
-extern void strfree(char *str);
-
-/*
- * Memory allocation interfaces
- */
-#define KM_SLEEP 0x0000 /* can block for memory; success guaranteed */
-#define KM_NOSLEEP 0x0001 /* cannot block for memory; may fail */
-#define KM_PUSHPAGE 0x0004 /* can block for memory; may use reserve */
-#define KM_ZERO 0x1000 /* zero the allocation */
-#define KM_VMEM 0x2000 /* caller is vmem_* wrapper */
-
-#define KM_PUBLIC_MASK (KM_SLEEP | KM_NOSLEEP | KM_PUSHPAGE)
-
-static int spl_fstrans_check(void);
-
-/*
- * Convert a KM_* flags mask to its Linux GFP_* counterpart. The conversion
- * function is context aware which means that KM_SLEEP allocations can be
- * safely used in syncing contexts which have set PF_FSTRANS.
- */
-static inline gfp_t
-kmem_flags_convert(int flags)
-{
- gfp_t lflags = __GFP_NOWARN | __GFP_COMP;
-
- if (flags & KM_NOSLEEP) {
- lflags |= GFP_ATOMIC | __GFP_NORETRY;
- } else {
- lflags |= GFP_KERNEL;
- if (spl_fstrans_check())
- lflags &= ~(__GFP_IO|__GFP_FS);
- }
-
- if (flags & KM_PUSHPAGE)
- lflags |= __GFP_HIGH;
-
- if (flags & KM_ZERO)
- lflags |= __GFP_ZERO;
-
- return (lflags);
-}
-
-typedef struct {
- struct task_struct *fstrans_thread;
- unsigned int saved_flags;
-} fstrans_cookie_t;
-
-/*
- * Introduced in Linux 3.9, however this cannot be solely relied on before
- * Linux 3.18 as it doesn't turn off __GFP_FS as it should.
- */
-#ifdef PF_MEMALLOC_NOIO
-#define __SPL_PF_MEMALLOC_NOIO (PF_MEMALLOC_NOIO)
-#else
-#define __SPL_PF_MEMALLOC_NOIO (0)
-#endif
-
-/*
- * PF_FSTRANS is removed from Linux 4.12
- */
-#ifdef PF_FSTRANS
-#define __SPL_PF_FSTRANS (PF_FSTRANS)
-#else
-#define __SPL_PF_FSTRANS (0)
-#endif
-
-#define SPL_FSTRANS (__SPL_PF_FSTRANS|__SPL_PF_MEMALLOC_NOIO)
-
-static inline fstrans_cookie_t
-spl_fstrans_mark(void)
-{
- fstrans_cookie_t cookie;
-
- BUILD_BUG_ON(SPL_FSTRANS == 0);
-
- cookie.fstrans_thread = current;
- cookie.saved_flags = current->flags & SPL_FSTRANS;
- current->flags |= SPL_FSTRANS;
-
- return (cookie);
-}
-
-static inline void
-spl_fstrans_unmark(fstrans_cookie_t cookie)
-{
- ASSERT3P(cookie.fstrans_thread, ==, current);
- ASSERT((current->flags & SPL_FSTRANS) == SPL_FSTRANS);
-
- current->flags &= ~SPL_FSTRANS;
- current->flags |= cookie.saved_flags;
-}
-
-static inline int
-spl_fstrans_check(void)
-{
- return (current->flags & SPL_FSTRANS);
-}
-
-/*
- * specifically used to check PF_FSTRANS flag, cannot be relied on for
- * checking spl_fstrans_mark().
- */
-static inline int
-__spl_pf_fstrans_check(void)
-{
- return (current->flags & __SPL_PF_FSTRANS);
-}
-
-#ifdef HAVE_ATOMIC64_T
-#define kmem_alloc_used_add(size) atomic64_add(size, &kmem_alloc_used)
-#define kmem_alloc_used_sub(size) atomic64_sub(size, &kmem_alloc_used)
-#define kmem_alloc_used_read() atomic64_read(&kmem_alloc_used)
-#define kmem_alloc_used_set(size) atomic64_set(&kmem_alloc_used, size)
-extern atomic64_t kmem_alloc_used;
-extern unsigned long long kmem_alloc_max;
-#else /* HAVE_ATOMIC64_T */
-#define kmem_alloc_used_add(size) atomic_add(size, &kmem_alloc_used)
-#define kmem_alloc_used_sub(size) atomic_sub(size, &kmem_alloc_used)
-#define kmem_alloc_used_read() atomic_read(&kmem_alloc_used)
-#define kmem_alloc_used_set(size) atomic_set(&kmem_alloc_used, size)
-extern atomic_t kmem_alloc_used;
-extern unsigned long long kmem_alloc_max;
-#endif /* HAVE_ATOMIC64_T */
-
-extern unsigned int spl_kmem_alloc_warn;
-extern unsigned int spl_kmem_alloc_max;
-
-#define kmem_alloc(sz, fl) spl_kmem_alloc((sz), (fl), __func__, __LINE__)
-#define kmem_zalloc(sz, fl) spl_kmem_zalloc((sz), (fl), __func__, __LINE__)
-#define kmem_free(ptr, sz) spl_kmem_free((ptr), (sz))
-
-extern void *spl_kmem_alloc(size_t sz, int fl, const char *func, int line);
-extern void *spl_kmem_zalloc(size_t sz, int fl, const char *func, int line);
-extern void spl_kmem_free(const void *ptr, size_t sz);
-
-/*
- * The following functions are only available for internal use.
- */
-extern void *spl_kmem_alloc_impl(size_t size, int flags, int node);
-extern void *spl_kmem_alloc_debug(size_t size, int flags, int node);
-extern void *spl_kmem_alloc_track(size_t size, int flags,
- const char *func, int line, int node);
-extern void spl_kmem_free_impl(const void *buf, size_t size);
-extern void spl_kmem_free_debug(const void *buf, size_t size);
-extern void spl_kmem_free_track(const void *buf, size_t size);
-
-extern int spl_kmem_init(void);
-extern void spl_kmem_fini(void);
-
-#endif /* _SPL_KMEM_H */
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