1183 lines
35 KiB
C
1183 lines
35 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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* Solaris Porting Layer (SPL) Proc Implementation.
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\*****************************************************************************/
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#include <sys/systeminfo.h>
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#include <sys/kstat.h>
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#include <linux/kmod.h>
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#include <linux/seq_file.h>
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#include <linux/proc_compat.h>
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#include <linux/version.h>
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#include <spl-debug.h>
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#ifdef SS_DEBUG_SUBSYS
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#undef SS_DEBUG_SUBSYS
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#endif
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#define SS_DEBUG_SUBSYS SS_PROC
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#if defined(CONSTIFY_PLUGIN) && LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
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typedef struct ctl_table __no_const spl_ctl_table;
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#else
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typedef struct ctl_table spl_ctl_table;
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#endif
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#ifdef DEBUG_KMEM
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static unsigned long table_min = 0;
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static unsigned long table_max = ~0;
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#endif
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#ifdef CONFIG_SYSCTL
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static struct ctl_table_header *spl_header = NULL;
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#endif /* CONFIG_SYSCTL */
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static struct proc_dir_entry *proc_spl = NULL;
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#ifdef DEBUG_KMEM
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static struct proc_dir_entry *proc_spl_kmem = NULL;
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static struct proc_dir_entry *proc_spl_kmem_slab = NULL;
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#endif /* DEBUG_KMEM */
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struct proc_dir_entry *proc_spl_kstat = NULL;
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#ifdef HAVE_CTL_NAME
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#ifdef HAVE_CTL_UNNUMBERED
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#define CTL_SPL CTL_UNNUMBERED
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#define CTL_SPL_DEBUG CTL_UNNUMBERED
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#define CTL_SPL_VM CTL_UNNUMBERED
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#define CTL_SPL_MUTEX CTL_UNNUMBERED
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#define CTL_SPL_KMEM CTL_UNNUMBERED
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#define CTL_SPL_KSTAT CTL_UNNUMBERED
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#define CTL_VERSION CTL_UNNUMBERED /* Version */
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#define CTL_HOSTID CTL_UNNUMBERED /* Host id by /usr/bin/hostid */
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#define CTL_KALLSYMS CTL_UNNUMBERED /* kallsyms_lookup_name addr */
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#define CTL_DEBUG_SUBSYS CTL_UNNUMBERED /* Debug subsystem */
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#define CTL_DEBUG_MASK CTL_UNNUMBERED /* Debug mask */
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#define CTL_DEBUG_PRINTK CTL_UNNUMBERED /* All messages to console */
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#define CTL_DEBUG_MB CTL_UNNUMBERED /* Debug buffer size */
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#define CTL_DEBUG_BINARY CTL_UNNUMBERED /* Binary data in buffer */
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#define CTL_DEBUG_CATASTROPHE CTL_UNNUMBERED /* Set if BUG'd or panic'd */
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#define CTL_DEBUG_PANIC_ON_BUG CTL_UNNUMBERED /* Should panic on BUG */
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#define CTL_DEBUG_PATH CTL_UNNUMBERED /* Dump log location */
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#define CTL_DEBUG_DUMP CTL_UNNUMBERED /* Dump debug buffer to file */
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#define CTL_DEBUG_FORCE_BUG CTL_UNNUMBERED /* Hook to force a BUG */
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#define CTL_DEBUG_STACK_SIZE CTL_UNNUMBERED /* Max observed stack size */
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#define CTL_CONSOLE_RATELIMIT CTL_UNNUMBERED /* Ratelimit console messages */
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#define CTL_CONSOLE_MAX_DELAY_CS CTL_UNNUMBERED /* Max delay skip messages */
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#define CTL_CONSOLE_MIN_DELAY_CS CTL_UNNUMBERED /* Init delay skip messages */
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#define CTL_CONSOLE_BACKOFF CTL_UNNUMBERED /* Delay increase factor */
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#define CTL_VM_MINFREE CTL_UNNUMBERED /* Minimum free memory */
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#define CTL_VM_DESFREE CTL_UNNUMBERED /* Desired free memory */
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#define CTL_VM_LOTSFREE CTL_UNNUMBERED /* Lots of free memory */
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#define CTL_VM_NEEDFREE CTL_UNNUMBERED /* Need free memory */
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#define CTL_VM_SWAPFS_MINFREE CTL_UNNUMBERED /* Minimum swapfs memory */
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#define CTL_VM_SWAPFS_RESERVE CTL_UNNUMBERED /* Reserved swapfs memory */
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#define CTL_VM_AVAILRMEM CTL_UNNUMBERED /* Easily available memory */
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#define CTL_VM_FREEMEM CTL_UNNUMBERED /* Free memory */
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#define CTL_VM_PHYSMEM CTL_UNNUMBERED /* Total physical memory */
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#ifdef DEBUG_KMEM
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#define CTL_KMEM_KMEMUSED CTL_UNNUMBERED /* Alloc'd kmem bytes */
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#define CTL_KMEM_KMEMMAX CTL_UNNUMBERED /* Max alloc'd by kmem bytes */
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#define CTL_KMEM_VMEMUSED CTL_UNNUMBERED /* Alloc'd vmem bytes */
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#define CTL_KMEM_VMEMMAX CTL_UNNUMBERED /* Max alloc'd by vmem bytes */
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#define CTL_KMEM_SLAB_KMEMTOTAL CTL_UNNUMBERED /* Total kmem slab size */
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#define CTL_KMEM_SLAB_KMEMALLOC CTL_UNNUMBERED /* Alloc'd kmem slab size */
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#define CTL_KMEM_SLAB_KMEMMAX CTL_UNNUMBERED /* Max kmem slab size */
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#define CTL_KMEM_SLAB_VMEMTOTAL CTL_UNNUMBERED /* Total vmem slab size */
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#define CTL_KMEM_SLAB_VMEMALLOC CTL_UNNUMBERED /* Alloc'd vmem slab size */
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#define CTL_KMEM_SLAB_VMEMMAX CTL_UNNUMBERED /* Max vmem slab size */
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#endif
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#else /* HAVE_CTL_UNNUMBERED */
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enum {
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CTL_SPL = 0x87,
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CTL_SPL_DEBUG = 0x88,
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CTL_SPL_VM = 0x89,
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CTL_SPL_MUTEX = 0x90,
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CTL_SPL_KMEM = 0x91,
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CTL_SPL_KSTAT = 0x92,
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};
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enum {
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CTL_VERSION = 1, /* Version */
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CTL_HOSTID, /* Host id reported by /usr/bin/hostid */
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CTL_KALLSYMS, /* Address of kallsyms_lookup_name */
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#ifdef DEBUG_LOG
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CTL_DEBUG_SUBSYS, /* Debug subsystem */
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CTL_DEBUG_MASK, /* Debug mask */
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CTL_DEBUG_PRINTK, /* Force all messages to console */
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CTL_DEBUG_MB, /* Debug buffer size */
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CTL_DEBUG_BINARY, /* Include binary data in buffer */
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CTL_DEBUG_CATASTROPHE, /* Set if we have BUG'd or panic'd */
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CTL_DEBUG_PANIC_ON_BUG, /* Set if we should panic on BUG */
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CTL_DEBUG_PATH, /* Dump log location */
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CTL_DEBUG_DUMP, /* Dump debug buffer to file */
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CTL_DEBUG_FORCE_BUG, /* Hook to force a BUG */
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CTL_DEBUG_STACK_SIZE, /* Max observed stack size */
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#endif
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CTL_CONSOLE_RATELIMIT, /* Ratelimit console messages */
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CTL_CONSOLE_MAX_DELAY_CS, /* Max delay which we skip messages */
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CTL_CONSOLE_MIN_DELAY_CS, /* Init delay which we skip messages */
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CTL_CONSOLE_BACKOFF, /* Delay increase factor */
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CTL_VM_MINFREE, /* Minimum free memory threshold */
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CTL_VM_DESFREE, /* Desired free memory threshold */
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CTL_VM_LOTSFREE, /* Lots of free memory threshold */
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CTL_VM_NEEDFREE, /* Need free memory deficit */
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CTL_VM_SWAPFS_MINFREE, /* Minimum swapfs memory */
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CTL_VM_SWAPFS_RESERVE, /* Reserved swapfs memory */
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CTL_VM_AVAILRMEM, /* Easily available memory */
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CTL_VM_FREEMEM, /* Free memory */
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CTL_VM_PHYSMEM, /* Total physical memory */
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#ifdef DEBUG_KMEM
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CTL_KMEM_KMEMUSED, /* Alloc'd kmem bytes */
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CTL_KMEM_KMEMMAX, /* Max alloc'd by kmem bytes */
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CTL_KMEM_VMEMUSED, /* Alloc'd vmem bytes */
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CTL_KMEM_VMEMMAX, /* Max alloc'd by vmem bytes */
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CTL_KMEM_SLAB_KMEMTOTAL, /* Total kmem slab size */
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CTL_KMEM_SLAB_KMEMALLOC, /* Alloc'd kmem slab size */
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CTL_KMEM_SLAB_KMEMMAX, /* Max kmem slab size */
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CTL_KMEM_SLAB_VMEMTOTAL, /* Total vmem slab size */
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CTL_KMEM_SLAB_VMEMALLOC, /* Alloc'd vmem slab size */
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CTL_KMEM_SLAB_VMEMMAX, /* Max vmem slab size */
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#endif
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};
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#endif /* HAVE_CTL_UNNUMBERED */
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#endif /* HAVE_CTL_NAME */
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static int
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proc_copyin_string(char *kbuffer, int kbuffer_size,
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const char *ubuffer, int ubuffer_size)
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{
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int size;
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if (ubuffer_size > kbuffer_size)
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return -EOVERFLOW;
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if (copy_from_user((void *)kbuffer, (void *)ubuffer, ubuffer_size))
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return -EFAULT;
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/* strip trailing whitespace */
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size = strnlen(kbuffer, ubuffer_size);
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while (size-- >= 0)
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if (!isspace(kbuffer[size]))
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break;
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/* empty string */
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if (size < 0)
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return -EINVAL;
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/* no space to terminate */
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if (size == kbuffer_size)
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return -EOVERFLOW;
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kbuffer[size + 1] = 0;
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return 0;
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}
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static int
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proc_copyout_string(char *ubuffer, int ubuffer_size,
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const char *kbuffer, char *append)
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{
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/* NB if 'append' != NULL, it's a single character to append to the
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* copied out string - usually "\n", for /proc entries and
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* (i.e. a terminating zero byte) for sysctl entries
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*/
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int size = MIN(strlen(kbuffer), ubuffer_size);
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if (copy_to_user(ubuffer, kbuffer, size))
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return -EFAULT;
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if (append != NULL && size < ubuffer_size) {
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if (copy_to_user(ubuffer + size, append, 1))
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return -EFAULT;
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size++;
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}
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return size;
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}
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#ifdef DEBUG_LOG
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SPL_PROC_HANDLER(proc_dobitmasks)
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{
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unsigned long *mask = table->data;
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int is_subsys = (mask == &spl_debug_subsys) ? 1 : 0;
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int is_printk = (mask == &spl_debug_printk) ? 1 : 0;
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int size = 512, rc;
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char *str;
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SENTRY;
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str = kmem_alloc(size, KM_SLEEP);
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if (str == NULL)
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SRETURN(-ENOMEM);
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if (write) {
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rc = proc_copyin_string(str, size, buffer, *lenp);
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if (rc < 0)
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SRETURN(rc);
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rc = spl_debug_str2mask(mask, str, is_subsys);
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/* Always print BUG/ASSERT to console, so keep this mask */
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if (is_printk)
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*mask |= SD_EMERG;
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*ppos += *lenp;
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} else {
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rc = spl_debug_mask2str(str, size, *mask, is_subsys);
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if (*ppos >= rc)
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rc = 0;
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else
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rc = proc_copyout_string(buffer, *lenp,
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str + *ppos, "\n");
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if (rc >= 0) {
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*lenp = rc;
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*ppos += rc;
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}
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}
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kmem_free(str, size);
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SRETURN(rc);
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}
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SPL_PROC_HANDLER(proc_debug_mb)
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{
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char str[32];
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int rc, len;
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SENTRY;
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if (write) {
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rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
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if (rc < 0)
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SRETURN(rc);
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rc = spl_debug_set_mb(simple_strtoul(str, NULL, 0));
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*ppos += *lenp;
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} else {
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len = snprintf(str, sizeof(str), "%d", spl_debug_get_mb());
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if (*ppos >= len)
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rc = 0;
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else
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rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
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if (rc >= 0) {
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*lenp = rc;
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*ppos += rc;
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}
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}
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SRETURN(rc);
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}
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SPL_PROC_HANDLER(proc_dump_kernel)
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{
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SENTRY;
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if (write) {
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spl_debug_dumplog(0);
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*ppos += *lenp;
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} else {
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*lenp = 0;
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}
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SRETURN(0);
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}
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SPL_PROC_HANDLER(proc_force_bug)
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{
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SENTRY;
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if (write)
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PANIC("Crashing due to forced panic\n");
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else
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*lenp = 0;
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SRETURN(0);
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}
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SPL_PROC_HANDLER(proc_console_max_delay_cs)
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{
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int rc, max_delay_cs;
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spl_ctl_table dummy = *table;
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long d;
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SENTRY;
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dummy.data = &max_delay_cs;
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dummy.proc_handler = &proc_dointvec;
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if (write) {
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max_delay_cs = 0;
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rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
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if (rc < 0)
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SRETURN(rc);
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if (max_delay_cs <= 0)
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SRETURN(-EINVAL);
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d = (max_delay_cs * HZ) / 100;
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if (d == 0 || d < spl_console_min_delay)
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SRETURN(-EINVAL);
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spl_console_max_delay = d;
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} else {
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max_delay_cs = (spl_console_max_delay * 100) / HZ;
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rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
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}
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SRETURN(rc);
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}
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SPL_PROC_HANDLER(proc_console_min_delay_cs)
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{
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int rc, min_delay_cs;
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spl_ctl_table dummy = *table;
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long d;
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SENTRY;
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dummy.data = &min_delay_cs;
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dummy.proc_handler = &proc_dointvec;
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if (write) {
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min_delay_cs = 0;
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rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
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if (rc < 0)
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SRETURN(rc);
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if (min_delay_cs <= 0)
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SRETURN(-EINVAL);
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d = (min_delay_cs * HZ) / 100;
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if (d == 0 || d > spl_console_max_delay)
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SRETURN(-EINVAL);
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spl_console_min_delay = d;
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} else {
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min_delay_cs = (spl_console_min_delay * 100) / HZ;
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rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
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}
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SRETURN(rc);
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}
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SPL_PROC_HANDLER(proc_console_backoff)
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{
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int rc, backoff;
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spl_ctl_table dummy = *table;
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SENTRY;
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dummy.data = &backoff;
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dummy.proc_handler = &proc_dointvec;
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if (write) {
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backoff = 0;
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rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
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if (rc < 0)
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SRETURN(rc);
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if (backoff <= 0)
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SRETURN(-EINVAL);
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spl_console_backoff = backoff;
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} else {
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backoff = spl_console_backoff;
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rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
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}
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SRETURN(rc);
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}
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#endif /* DEBUG_LOG */
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#ifdef DEBUG_KMEM
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SPL_PROC_HANDLER(proc_domemused)
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{
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int rc = 0;
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unsigned long min = 0, max = ~0, val;
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spl_ctl_table dummy = *table;
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SENTRY;
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dummy.data = &val;
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dummy.proc_handler = &proc_dointvec;
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dummy.extra1 = &min;
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dummy.extra2 = &max;
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if (write) {
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*ppos += *lenp;
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} else {
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# ifdef HAVE_ATOMIC64_T
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val = atomic64_read((atomic64_t *)table->data);
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# else
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val = atomic_read((atomic_t *)table->data);
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# endif /* HAVE_ATOMIC64_T */
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rc = spl_proc_doulongvec_minmax(&dummy, write, filp,
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buffer, lenp, ppos);
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}
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SRETURN(rc);
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}
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SPL_PROC_HANDLER(proc_doslab)
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{
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int rc = 0;
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unsigned long min = 0, max = ~0, val = 0, mask;
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spl_ctl_table dummy = *table;
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spl_kmem_cache_t *skc;
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SENTRY;
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dummy.data = &val;
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dummy.proc_handler = &proc_dointvec;
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dummy.extra1 = &min;
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dummy.extra2 = &max;
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if (write) {
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*ppos += *lenp;
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} else {
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down_read(&spl_kmem_cache_sem);
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mask = (unsigned long)table->data;
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list_for_each_entry(skc, &spl_kmem_cache_list, skc_list) {
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/* Only use slabs of the correct kmem/vmem type */
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if (!(skc->skc_flags & mask))
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continue;
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/* Sum the specified field for selected slabs */
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switch (mask & (KMC_TOTAL | KMC_ALLOC | KMC_MAX)) {
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case KMC_TOTAL:
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val += skc->skc_slab_size * skc->skc_slab_total;
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break;
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case KMC_ALLOC:
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val += skc->skc_obj_size * skc->skc_obj_alloc;
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break;
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case KMC_MAX:
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val += skc->skc_obj_size * skc->skc_obj_max;
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break;
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}
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}
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up_read(&spl_kmem_cache_sem);
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rc = spl_proc_doulongvec_minmax(&dummy, write, filp,
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buffer, lenp, ppos);
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}
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SRETURN(rc);
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}
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#endif /* DEBUG_KMEM */
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|
|
SPL_PROC_HANDLER(proc_dohostid)
|
|
{
|
|
int len, rc = 0;
|
|
char *end, str[32];
|
|
SENTRY;
|
|
|
|
if (write) {
|
|
/* We can't use spl_proc_doulongvec_minmax() in the write
|
|
* case here because hostid while a hex value has no
|
|
* leading 0x which confuses the helper function. */
|
|
rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
|
|
if (rc < 0)
|
|
SRETURN(rc);
|
|
|
|
spl_hostid = simple_strtoul(str, &end, 16);
|
|
if (str == end)
|
|
SRETURN(-EINVAL);
|
|
|
|
} else {
|
|
len = snprintf(str, sizeof(str), "%lx", spl_hostid);
|
|
if (*ppos >= len)
|
|
rc = 0;
|
|
else
|
|
rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
|
|
|
|
if (rc >= 0) {
|
|
*lenp = rc;
|
|
*ppos += rc;
|
|
}
|
|
}
|
|
|
|
SRETURN(rc);
|
|
}
|
|
|
|
#ifndef HAVE_KALLSYMS_LOOKUP_NAME
|
|
SPL_PROC_HANDLER(proc_dokallsyms_lookup_name)
|
|
{
|
|
int len, rc = 0;
|
|
char *end, str[32];
|
|
SENTRY;
|
|
|
|
if (write) {
|
|
/* This may only be set once at module load time */
|
|
if (spl_kallsyms_lookup_name_fn != SYMBOL_POISON)
|
|
SRETURN(-EEXIST);
|
|
|
|
/* We can't use spl_proc_doulongvec_minmax() in the write
|
|
* case here because the address while a hex value has no
|
|
* leading 0x which confuses the helper function. */
|
|
rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
|
|
if (rc < 0)
|
|
SRETURN(rc);
|
|
|
|
spl_kallsyms_lookup_name_fn =
|
|
(kallsyms_lookup_name_t)simple_strtoul(str, &end, 16);
|
|
wake_up(&spl_kallsyms_lookup_name_waitq);
|
|
|
|
if (str == end)
|
|
SRETURN(-EINVAL);
|
|
|
|
*ppos += *lenp;
|
|
} else {
|
|
len = snprintf(str, sizeof(str), "%lx",
|
|
(unsigned long)spl_kallsyms_lookup_name_fn);
|
|
if (*ppos >= len)
|
|
rc = 0;
|
|
else
|
|
rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
|
|
|
|
if (rc >= 0) {
|
|
*lenp = rc;
|
|
*ppos += rc;
|
|
}
|
|
}
|
|
|
|
SRETURN(rc);
|
|
}
|
|
#endif /* HAVE_KALLSYMS_LOOKUP_NAME */
|
|
|
|
SPL_PROC_HANDLER(proc_doavailrmem)
|
|
{
|
|
int len, rc = 0;
|
|
char str[32];
|
|
SENTRY;
|
|
|
|
if (write) {
|
|
*ppos += *lenp;
|
|
} else {
|
|
len = snprintf(str, sizeof(str), "%lu",
|
|
(unsigned long)availrmem);
|
|
if (*ppos >= len)
|
|
rc = 0;
|
|
else
|
|
rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
|
|
|
|
if (rc >= 0) {
|
|
*lenp = rc;
|
|
*ppos += rc;
|
|
}
|
|
}
|
|
|
|
SRETURN(rc);
|
|
}
|
|
|
|
SPL_PROC_HANDLER(proc_dofreemem)
|
|
{
|
|
int len, rc = 0;
|
|
char str[32];
|
|
SENTRY;
|
|
|
|
if (write) {
|
|
*ppos += *lenp;
|
|
} else {
|
|
len = snprintf(str, sizeof(str), "%lu", (unsigned long)freemem);
|
|
if (*ppos >= len)
|
|
rc = 0;
|
|
else
|
|
rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
|
|
|
|
if (rc >= 0) {
|
|
*lenp = rc;
|
|
*ppos += rc;
|
|
}
|
|
}
|
|
|
|
SRETURN(rc);
|
|
}
|
|
|
|
#ifdef DEBUG_KMEM
|
|
static void
|
|
slab_seq_show_headers(struct seq_file *f)
|
|
{
|
|
seq_printf(f,
|
|
"--------------------- cache ----------"
|
|
"--------------------------------------------- "
|
|
"----- slab ------ "
|
|
"---- object ----- "
|
|
"--- emergency ---\n");
|
|
seq_printf(f,
|
|
"name "
|
|
" flags size alloc slabsize objsize "
|
|
"total alloc max "
|
|
"total alloc max "
|
|
"dlock alloc max\n");
|
|
}
|
|
|
|
static int
|
|
slab_seq_show(struct seq_file *f, void *p)
|
|
{
|
|
spl_kmem_cache_t *skc = p;
|
|
|
|
ASSERT(skc->skc_magic == SKC_MAGIC);
|
|
|
|
spin_lock(&skc->skc_lock);
|
|
seq_printf(f, "%-36s ", skc->skc_name);
|
|
seq_printf(f, "0x%05lx %9lu %9lu %8u %8u "
|
|
"%5lu %5lu %5lu %5lu %5lu %5lu %5lu %5lu %5lu\n",
|
|
(long unsigned)skc->skc_flags,
|
|
(long unsigned)(skc->skc_slab_size * skc->skc_slab_total),
|
|
(long unsigned)(skc->skc_obj_size * skc->skc_obj_alloc),
|
|
(unsigned)skc->skc_slab_size,
|
|
(unsigned)skc->skc_obj_size,
|
|
(long unsigned)skc->skc_slab_total,
|
|
(long unsigned)skc->skc_slab_alloc,
|
|
(long unsigned)skc->skc_slab_max,
|
|
(long unsigned)skc->skc_obj_total,
|
|
(long unsigned)skc->skc_obj_alloc,
|
|
(long unsigned)skc->skc_obj_max,
|
|
(long unsigned)skc->skc_obj_deadlock,
|
|
(long unsigned)skc->skc_obj_emergency,
|
|
(long unsigned)skc->skc_obj_emergency_max);
|
|
|
|
spin_unlock(&skc->skc_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *
|
|
slab_seq_start(struct seq_file *f, loff_t *pos)
|
|
{
|
|
struct list_head *p;
|
|
loff_t n = *pos;
|
|
SENTRY;
|
|
|
|
down_read(&spl_kmem_cache_sem);
|
|
if (!n)
|
|
slab_seq_show_headers(f);
|
|
|
|
p = spl_kmem_cache_list.next;
|
|
while (n--) {
|
|
p = p->next;
|
|
if (p == &spl_kmem_cache_list)
|
|
SRETURN(NULL);
|
|
}
|
|
|
|
SRETURN(list_entry(p, spl_kmem_cache_t, skc_list));
|
|
}
|
|
|
|
static void *
|
|
slab_seq_next(struct seq_file *f, void *p, loff_t *pos)
|
|
{
|
|
spl_kmem_cache_t *skc = p;
|
|
SENTRY;
|
|
|
|
++*pos;
|
|
SRETURN((skc->skc_list.next == &spl_kmem_cache_list) ?
|
|
NULL : list_entry(skc->skc_list.next,spl_kmem_cache_t,skc_list));
|
|
}
|
|
|
|
static void
|
|
slab_seq_stop(struct seq_file *f, void *v)
|
|
{
|
|
up_read(&spl_kmem_cache_sem);
|
|
}
|
|
|
|
static struct seq_operations slab_seq_ops = {
|
|
.show = slab_seq_show,
|
|
.start = slab_seq_start,
|
|
.next = slab_seq_next,
|
|
.stop = slab_seq_stop,
|
|
};
|
|
|
|
static int
|
|
proc_slab_open(struct inode *inode, struct file *filp)
|
|
{
|
|
return seq_open(filp, &slab_seq_ops);
|
|
}
|
|
|
|
static struct file_operations proc_slab_operations = {
|
|
.open = proc_slab_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release,
|
|
};
|
|
#endif /* DEBUG_KMEM */
|
|
|
|
#ifdef DEBUG_LOG
|
|
static struct ctl_table spl_debug_table[] = {
|
|
{
|
|
CTL_NAME (CTL_DEBUG_SUBSYS)
|
|
.procname = "subsystem",
|
|
.data = &spl_debug_subsys,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dobitmasks
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_MASK)
|
|
.procname = "mask",
|
|
.data = &spl_debug_mask,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dobitmasks
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_PRINTK)
|
|
.procname = "printk",
|
|
.data = &spl_debug_printk,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dobitmasks
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_MB)
|
|
.procname = "mb",
|
|
.mode = 0644,
|
|
.proc_handler = &proc_debug_mb,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_BINARY)
|
|
.procname = "binary",
|
|
.data = &spl_debug_binary,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_CATASTROPHE)
|
|
.procname = "catastrophe",
|
|
.data = &spl_debug_catastrophe,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_PANIC_ON_BUG)
|
|
.procname = "panic_on_bug",
|
|
.data = &spl_debug_panic_on_bug,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_PATH)
|
|
.procname = "path",
|
|
.data = spl_debug_file_path,
|
|
.maxlen = sizeof(spl_debug_file_path),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dostring,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_DUMP)
|
|
.procname = "dump",
|
|
.mode = 0200,
|
|
.proc_handler = &proc_dump_kernel,
|
|
},
|
|
{ CTL_NAME (CTL_DEBUG_FORCE_BUG)
|
|
.procname = "force_bug",
|
|
.mode = 0200,
|
|
.proc_handler = &proc_force_bug,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_CONSOLE_RATELIMIT)
|
|
.procname = "console_ratelimit",
|
|
.data = &spl_console_ratelimit,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_CONSOLE_MAX_DELAY_CS)
|
|
.procname = "console_max_delay_centisecs",
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_console_max_delay_cs,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_CONSOLE_MIN_DELAY_CS)
|
|
.procname = "console_min_delay_centisecs",
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_console_min_delay_cs,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_CONSOLE_BACKOFF)
|
|
.procname = "console_backoff",
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_console_backoff,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_DEBUG_STACK_SIZE)
|
|
.procname = "stack_max",
|
|
.data = &spl_debug_stack,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{0},
|
|
};
|
|
#endif /* DEBUG_LOG */
|
|
|
|
static struct ctl_table spl_vm_table[] = {
|
|
{
|
|
CTL_NAME (CTL_VM_MINFREE)
|
|
.procname = "minfree",
|
|
.data = &minfree,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_VM_DESFREE)
|
|
.procname = "desfree",
|
|
.data = &desfree,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_VM_LOTSFREE)
|
|
.procname = "lotsfree",
|
|
.data = &lotsfree,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_VM_NEEDFREE)
|
|
.procname = "needfree",
|
|
.data = &needfree,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_VM_SWAPFS_MINFREE)
|
|
.procname = "swapfs_minfree",
|
|
.data = &swapfs_minfree,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_VM_SWAPFS_RESERVE)
|
|
.procname = "swapfs_reserve",
|
|
.data = &swapfs_reserve,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_VM_AVAILRMEM)
|
|
.procname = "availrmem",
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doavailrmem,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_VM_FREEMEM)
|
|
.procname = "freemem",
|
|
.data = (void *)2,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dofreemem,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_VM_PHYSMEM)
|
|
.procname = "physmem",
|
|
.data = &physmem,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{0},
|
|
};
|
|
|
|
#ifdef DEBUG_KMEM
|
|
static struct ctl_table spl_kmem_table[] = {
|
|
{
|
|
CTL_NAME (CTL_KMEM_KMEMUSED)
|
|
.procname = "kmem_used",
|
|
.data = &kmem_alloc_used,
|
|
# ifdef HAVE_ATOMIC64_T
|
|
.maxlen = sizeof(atomic64_t),
|
|
# else
|
|
.maxlen = sizeof(atomic_t),
|
|
# endif /* HAVE_ATOMIC64_T */
|
|
.mode = 0444,
|
|
.proc_handler = &proc_domemused,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_KMEMMAX)
|
|
.procname = "kmem_max",
|
|
.data = &kmem_alloc_max,
|
|
.maxlen = sizeof(unsigned long),
|
|
.extra1 = &table_min,
|
|
.extra2 = &table_max,
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doulongvec_minmax,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_VMEMUSED)
|
|
.procname = "vmem_used",
|
|
.data = &vmem_alloc_used,
|
|
# ifdef HAVE_ATOMIC64_T
|
|
.maxlen = sizeof(atomic64_t),
|
|
# else
|
|
.maxlen = sizeof(atomic_t),
|
|
# endif /* HAVE_ATOMIC64_T */
|
|
.mode = 0444,
|
|
.proc_handler = &proc_domemused,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_VMEMMAX)
|
|
.procname = "vmem_max",
|
|
.data = &vmem_alloc_max,
|
|
.maxlen = sizeof(unsigned long),
|
|
.extra1 = &table_min,
|
|
.extra2 = &table_max,
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doulongvec_minmax,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_SLAB_KMEMTOTAL)
|
|
.procname = "slab_kmem_total",
|
|
.data = (void *)(KMC_KMEM | KMC_TOTAL),
|
|
.maxlen = sizeof(unsigned long),
|
|
.extra1 = &table_min,
|
|
.extra2 = &table_max,
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doslab,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_SLAB_KMEMALLOC)
|
|
.procname = "slab_kmem_alloc",
|
|
.data = (void *)(KMC_KMEM | KMC_ALLOC),
|
|
.maxlen = sizeof(unsigned long),
|
|
.extra1 = &table_min,
|
|
.extra2 = &table_max,
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doslab,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_SLAB_KMEMMAX)
|
|
.procname = "slab_kmem_max",
|
|
.data = (void *)(KMC_KMEM | KMC_MAX),
|
|
.maxlen = sizeof(unsigned long),
|
|
.extra1 = &table_min,
|
|
.extra2 = &table_max,
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doslab,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_SLAB_VMEMTOTAL)
|
|
.procname = "slab_vmem_total",
|
|
.data = (void *)(KMC_VMEM | KMC_TOTAL),
|
|
.maxlen = sizeof(unsigned long),
|
|
.extra1 = &table_min,
|
|
.extra2 = &table_max,
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doslab,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_SLAB_VMEMALLOC)
|
|
.procname = "slab_vmem_alloc",
|
|
.data = (void *)(KMC_VMEM | KMC_ALLOC),
|
|
.maxlen = sizeof(unsigned long),
|
|
.extra1 = &table_min,
|
|
.extra2 = &table_max,
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doslab,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_KMEM_SLAB_VMEMMAX)
|
|
.procname = "slab_vmem_max",
|
|
.data = (void *)(KMC_VMEM | KMC_MAX),
|
|
.maxlen = sizeof(unsigned long),
|
|
.extra1 = &table_min,
|
|
.extra2 = &table_max,
|
|
.mode = 0444,
|
|
.proc_handler = &proc_doslab,
|
|
},
|
|
{0},
|
|
};
|
|
#endif /* DEBUG_KMEM */
|
|
|
|
static struct ctl_table spl_kstat_table[] = {
|
|
{0},
|
|
};
|
|
|
|
static struct ctl_table spl_table[] = {
|
|
/* NB No .strategy entries have been provided since
|
|
* sysctl(8) prefers to go via /proc for portability.
|
|
*/
|
|
{
|
|
CTL_NAME (CTL_VERSION)
|
|
.procname = "version",
|
|
.data = spl_version,
|
|
.maxlen = sizeof(spl_version),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dostring,
|
|
},
|
|
{
|
|
CTL_NAME (CTL_HOSTID)
|
|
.procname = "hostid",
|
|
.data = &spl_hostid,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dohostid,
|
|
},
|
|
#ifndef HAVE_KALLSYMS_LOOKUP_NAME
|
|
{
|
|
CTL_NAME (CTL_KALLSYMS)
|
|
.procname = "kallsyms_lookup_name",
|
|
.data = &spl_kallsyms_lookup_name_fn,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dokallsyms_lookup_name,
|
|
},
|
|
#endif
|
|
#ifdef DEBUG_LOG
|
|
{
|
|
CTL_NAME (CTL_SPL_DEBUG)
|
|
.procname = "debug",
|
|
.mode = 0555,
|
|
.child = spl_debug_table,
|
|
},
|
|
#endif
|
|
{
|
|
CTL_NAME (CTL_SPL_VM)
|
|
.procname = "vm",
|
|
.mode = 0555,
|
|
.child = spl_vm_table,
|
|
},
|
|
#ifdef DEBUG_KMEM
|
|
{
|
|
CTL_NAME (CTL_SPL_KMEM)
|
|
.procname = "kmem",
|
|
.mode = 0555,
|
|
.child = spl_kmem_table,
|
|
},
|
|
#endif
|
|
{
|
|
CTL_NAME (CTL_SPL_KSTAT)
|
|
.procname = "kstat",
|
|
.mode = 0555,
|
|
.child = spl_kstat_table,
|
|
},
|
|
{ 0 },
|
|
};
|
|
|
|
static struct ctl_table spl_dir[] = {
|
|
{
|
|
CTL_NAME (CTL_SPL)
|
|
.procname = "spl",
|
|
.mode = 0555,
|
|
.child = spl_table,
|
|
},
|
|
{ 0 }
|
|
};
|
|
|
|
static struct ctl_table spl_root[] = {
|
|
{
|
|
CTL_NAME (CTL_KERN)
|
|
.procname = "kernel",
|
|
.mode = 0555,
|
|
.child = spl_dir,
|
|
},
|
|
{ 0 }
|
|
};
|
|
|
|
int
|
|
spl_proc_init(void)
|
|
{
|
|
int rc = 0;
|
|
SENTRY;
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
spl_header = spl_register_sysctl_table(spl_root, 0);
|
|
if (spl_header == NULL)
|
|
SRETURN(-EUNATCH);
|
|
#endif /* CONFIG_SYSCTL */
|
|
|
|
proc_spl = proc_mkdir("spl", NULL);
|
|
if (proc_spl == NULL)
|
|
SGOTO(out, rc = -EUNATCH);
|
|
|
|
#ifdef DEBUG_KMEM
|
|
proc_spl_kmem = proc_mkdir("kmem", proc_spl);
|
|
if (proc_spl_kmem == NULL)
|
|
SGOTO(out, rc = -EUNATCH);
|
|
|
|
proc_spl_kmem_slab = proc_create_data("slab", 0444,
|
|
proc_spl_kmem, &proc_slab_operations, NULL);
|
|
if (proc_spl_kmem_slab == NULL)
|
|
SGOTO(out, rc = -EUNATCH);
|
|
|
|
#endif /* DEBUG_KMEM */
|
|
|
|
proc_spl_kstat = proc_mkdir("kstat", proc_spl);
|
|
if (proc_spl_kstat == NULL)
|
|
SGOTO(out, rc = -EUNATCH);
|
|
out:
|
|
if (rc) {
|
|
remove_proc_entry("kstat", proc_spl);
|
|
#ifdef DEBUG_KMEM
|
|
remove_proc_entry("slab", proc_spl_kmem);
|
|
remove_proc_entry("kmem", proc_spl);
|
|
#endif
|
|
remove_proc_entry("spl", NULL);
|
|
#ifdef CONFIG_SYSCTL
|
|
spl_unregister_sysctl_table(spl_header);
|
|
#endif /* CONFIG_SYSCTL */
|
|
}
|
|
|
|
SRETURN(rc);
|
|
}
|
|
|
|
void
|
|
spl_proc_fini(void)
|
|
{
|
|
SENTRY;
|
|
|
|
remove_proc_entry("kstat", proc_spl);
|
|
#ifdef DEBUG_KMEM
|
|
remove_proc_entry("slab", proc_spl_kmem);
|
|
remove_proc_entry("kmem", proc_spl);
|
|
#endif
|
|
remove_proc_entry("spl", NULL);
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
ASSERT(spl_header != NULL);
|
|
spl_unregister_sysctl_table(spl_header);
|
|
#endif /* CONFIG_SYSCTL */
|
|
|
|
SEXIT;
|
|
}
|