[mirror_spl-debian.git] / module / spl / spl-proc.c

/*****************************************************************************\
 *  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/>.
 *****************************************************************************
 *  Solaris Porting Layer (SPL) Proc Implementation.
\*****************************************************************************/

#include <sys/systeminfo.h>
#include <sys/kstat.h>
#include <sys/kmem.h>
#include <sys/kmem_cache.h>
#include <sys/vmem.h>
#include <linux/ctype.h>
#include <linux/kmod.h>
#include <linux/seq_file.h>
#include <linux/proc_compat.h>
#include <linux/uaccess.h>
#include <linux/version.h>

#if defined(CONSTIFY_PLUGIN) && LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
typedef struct ctl_table __no_const spl_ctl_table;
#else
typedef struct ctl_table spl_ctl_table;
#endif

#ifdef DEBUG_KMEM
static unsigned long table_min = 0;
static unsigned long table_max = ~0;
#endif

static struct ctl_table_header *spl_header = NULL;
static struct proc_dir_entry *proc_spl = NULL;
#ifdef DEBUG_KMEM
static struct proc_dir_entry *proc_spl_kmem = NULL;
static struct proc_dir_entry *proc_spl_kmem_slab = NULL;
#endif /* DEBUG_KMEM */
struct proc_dir_entry *proc_spl_kstat = NULL;

static int
proc_copyin_string(char *kbuffer, int kbuffer_size,
                   const char *ubuffer, int ubuffer_size)
{
        int size;

        if (ubuffer_size > kbuffer_size)
                return -EOVERFLOW;

        if (copy_from_user((void *)kbuffer, (void *)ubuffer, ubuffer_size))
                return -EFAULT;

        /* strip trailing whitespace */
        size = strnlen(kbuffer, ubuffer_size);
        while (size-- >= 0)
                if (!isspace(kbuffer[size]))
                        break;

        /* empty string */
        if (size < 0)
                return -EINVAL;

        /* no space to terminate */
        if (size == kbuffer_size)
                return -EOVERFLOW;

        kbuffer[size + 1] = 0;
        return 0;
}

static int
proc_copyout_string(char *ubuffer, int ubuffer_size,
                    const char *kbuffer, char *append)
{
        /* NB if 'append' != NULL, it's a single character to append to the
         * copied out string - usually "\n", for /proc entries and
         * (i.e. a terminating zero byte) for sysctl entries
         */
        int size = MIN(strlen(kbuffer), ubuffer_size);

        if (copy_to_user(ubuffer, kbuffer, size))
                return -EFAULT;

        if (append != NULL && size < ubuffer_size) {
                if (copy_to_user(ubuffer + size, append, 1))
                        return -EFAULT;

                size++;
        }

        return size;
}

#ifdef DEBUG_KMEM
static int
proc_domemused(struct ctl_table *table, int write,
    void __user *buffer, size_t *lenp, loff_t *ppos)
{
        int rc = 0;
        unsigned long min = 0, max = ~0, val;
        spl_ctl_table dummy = *table;

        dummy.data = &val;
        dummy.proc_handler = &proc_dointvec;
        dummy.extra1 = &min;
        dummy.extra2 = &max;

        if (write) {
                *ppos += *lenp;
        } else {
# ifdef HAVE_ATOMIC64_T
                val = atomic64_read((atomic64_t *)table->data);
# else
                val = atomic_read((atomic_t *)table->data);
# endif /* HAVE_ATOMIC64_T */
                rc = proc_doulongvec_minmax(&dummy, write, buffer, lenp, ppos);
        }

        return (rc);
}

static int
proc_doslab(struct ctl_table *table, int write,
    void __user *buffer, size_t *lenp, loff_t *ppos)
{
        int rc = 0;
        unsigned long min = 0, max = ~0, val = 0, mask;
        spl_ctl_table dummy = *table;
        spl_kmem_cache_t *skc;

        dummy.data = &val;
        dummy.proc_handler = &proc_dointvec;
        dummy.extra1 = &min;
        dummy.extra2 = &max;

        if (write) {
                *ppos += *lenp;
        } else {
                down_read(&spl_kmem_cache_sem);
                mask = (unsigned long)table->data;

                list_for_each_entry(skc, &spl_kmem_cache_list, skc_list) {

			/* Only use slabs of the correct kmem/vmem type */
			if (!(skc->skc_flags & mask))
				continue;

			/* Sum the specified field for selected slabs */
			switch (mask & (KMC_TOTAL | KMC_ALLOC | KMC_MAX)) {
			case KMC_TOTAL:
	                        val += skc->skc_slab_size * skc->skc_slab_total;
				break;
			case KMC_ALLOC:
	                        val += skc->skc_obj_size * skc->skc_obj_alloc;
				break;
			case KMC_MAX:
	                        val += skc->skc_obj_size * skc->skc_obj_max;
				break;
			}
                }

                up_read(&spl_kmem_cache_sem);
                rc = proc_doulongvec_minmax(&dummy, write, buffer, lenp, ppos);
        }

        return (rc);
}
#endif /* DEBUG_KMEM */

static int
proc_dohostid(struct ctl_table *table, int write,
    void __user *buffer, size_t *lenp, loff_t *ppos)
{
        int len, rc = 0;
        char *end, str[32];

        if (write) {
                /* We can't use 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)
                        return (rc);

                spl_hostid = simple_strtoul(str, &end, 16);
                if (str == end)
                        return (-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;
                }
        }

        return (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);

	/*
	 * Backed by Linux slab see /proc/slabinfo.
	 */
	if (skc->skc_flags & KMC_SLAB)
		return (0);

        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;

	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)
                        return (NULL);
        }

        return (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;

        ++*pos;
        return ((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_KMEM
static struct ctl_table spl_kmem_table[] = {
        {
                .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,
        },
        {
                .procname = "kmem_max",
                .data     = &kmem_alloc_max,
                .maxlen   = sizeof(unsigned long),
                .extra1   = &table_min,
                .extra2   = &table_max,
                .mode     = 0444,
                .proc_handler = &proc_doulongvec_minmax,
        },
        {
                .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,
        },
        {
                .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,
        },
        {
                .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,
        },
        {
                .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,
        },
        {
                .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,
        },
        {
                .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.
         */
        {
                .procname = "version",
                .data     = spl_version,
                .maxlen   = sizeof(spl_version),
                .mode     = 0444,
                .proc_handler = &proc_dostring,
        },
        {
                .procname = "hostid",
                .data     = &spl_hostid,
                .maxlen   = sizeof(unsigned long),
                .mode     = 0644,
                .proc_handler = &proc_dohostid,
        },
#ifdef DEBUG_KMEM
	{
		.procname = "kmem",
		.mode     = 0555,
		.child    = spl_kmem_table,
	},
#endif
	{
		.procname = "kstat",
		.mode     = 0555,
		.child    = spl_kstat_table,
	},
        { 0 },
};

static struct ctl_table spl_dir[] = {
        {
                .procname = "spl",
                .mode     = 0555,
                .child    = spl_table,
        },
        { 0 }
};

static struct ctl_table spl_root[] = {
	{
#ifdef HAVE_CTL_NAME
	.ctl_name = CTL_KERN,
#endif
	.procname = "kernel",
	.mode = 0555,
	.child = spl_dir,
	},
	{ 0 }
};

int
spl_proc_init(void)
{
	int rc = 0;

        spl_header = register_sysctl_table(spl_root);
	if (spl_header == NULL)
		return (-EUNATCH);

	proc_spl = proc_mkdir("spl", NULL);
	if (proc_spl == NULL) {
		rc = -EUNATCH;
		goto out;
	}

#ifdef DEBUG_KMEM
        proc_spl_kmem = proc_mkdir("kmem", proc_spl);
        if (proc_spl_kmem == NULL) {
                rc = -EUNATCH;
		goto out;
	}

	proc_spl_kmem_slab = proc_create_data("slab", 0444,
		proc_spl_kmem, &proc_slab_operations, NULL);
        if (proc_spl_kmem_slab == NULL) {
		rc = -EUNATCH;
		goto out;
	}

#endif /* DEBUG_KMEM */

        proc_spl_kstat = proc_mkdir("kstat", proc_spl);
        if (proc_spl_kstat == NULL) {
                rc = -EUNATCH;
		goto out;
	}
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);
	        unregister_sysctl_table(spl_header);
	}

        return (rc);
}

void
spl_proc_fini(void)
{
	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);

        ASSERT(spl_header != NULL);
        unregister_sysctl_table(spl_header);
}
Commit	Line	Data
716154c5 BB	1	/*****************************************************************************\
	2	* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
	3	* Copyright (C) 2007 The Regents of the University of California.
	4	* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
	5	* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
715f6251	6	* UCRL-CODE-235197
715f6251	7	*
716154c5	8	* This file is part of the SPL, Solaris Porting Layer.
3d6af2dd	9	* For details, see <http://zfsonlinux.org/>.
716154c5 BB	10	*
	11	* The SPL is free software; you can redistribute it and/or modify it
	12	* under the terms of the GNU General Public License as published by the
	13	* Free Software Foundation; either version 2 of the License, or (at your
	14	* option) any later version.
715f6251	15	*
716154c5	16	* The SPL is distributed in the hope that it will be useful, but WITHOUT
715f6251	17	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	18	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	19	* for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License along
716154c5 BB	22	* with the SPL. If not, see <http://www.gnu.org/licenses/>.
	23	*****************************************************************************
	24	* Solaris Porting Layer (SPL) Proc Implementation.
	25	\*****************************************************************************/
715f6251	26
ae4c36ad BB	27	#include <sys/systeminfo.h>
ae4c36ad BB	28	#include <sys/kstat.h>
10946b02 AX	29	#include <sys/kmem.h>
	30	#include <sys/kmem_cache.h>
	31	#include <sys/vmem.h>
	32	#include <linux/ctype.h>
ae4c36ad BB	33	#include <linux/kmod.h>
	34	#include <linux/seq_file.h>
	35	#include <linux/proc_compat.h>
10946b02	36	#include <linux/uaccess.h>
80093b6f	37	#include <linux/version.h>
57d1b188	38
80093b6f AX	39	#if defined(CONSTIFY_PLUGIN) && LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
	40	typedef struct ctl_table __no_const spl_ctl_table;
	41	#else
	42	typedef struct ctl_table spl_ctl_table;
	43	#endif
	44
404992e3	45	#ifdef DEBUG_KMEM
57d1b188	46	static unsigned long table_min = 0;
57d1b188	47	static unsigned long table_max = ~0;
404992e3	48	#endif
404992e3	49
404992e3	50	static struct ctl_table_header *spl_header = NULL;
c30df9c8	51	static struct proc_dir_entry *proc_spl = NULL;
04a479f7	52	#ifdef DEBUG_KMEM
c30df9c8	53	static struct proc_dir_entry *proc_spl_kmem = NULL;
ff449ac4	54	static struct proc_dir_entry *proc_spl_kmem_slab = NULL;
c30df9c8	55	#endif /* DEBUG_KMEM */
c30df9c8	56	struct proc_dir_entry *proc_spl_kstat = NULL;
57d1b188	57
57d1b188	58	static int
	59	proc_copyin_string(char *kbuffer, int kbuffer_size,
	60	const char *ubuffer, int ubuffer_size)
	61	{
	62	int size;
	63
	64	if (ubuffer_size > kbuffer_size)
	65	return -EOVERFLOW;
	66
	67	if (copy_from_user((void )kbuffer, (void )ubuffer, ubuffer_size))
	68	return -EFAULT;
	69
	70	/* strip trailing whitespace */
	71	size = strnlen(kbuffer, ubuffer_size);
	72	while (size-- >= 0)
	73	if (!isspace(kbuffer[size]))
	74	break;
	75
	76	/* empty string */
	77	if (size < 0)
	78	return -EINVAL;
	79
	80	/* no space to terminate */
	81	if (size == kbuffer_size)
	82	return -EOVERFLOW;
	83
	84	kbuffer[size + 1] = 0;
	85	return 0;
	86	}
	87
	88	static int
	89	proc_copyout_string(char *ubuffer, int ubuffer_size,
	90	const char kbuffer, char append)
	91	{
	92	/* NB if 'append' != NULL, it's a single character to append to the
	93	* copied out string - usually "\n", for /proc entries and
	94	* (i.e. a terminating zero byte) for sysctl entries
	95	*/
	96	int size = MIN(strlen(kbuffer), ubuffer_size);
	97
	98	if (copy_to_user(ubuffer, kbuffer, size))
	99	return -EFAULT;
	100
	101	if (append != NULL && size < ubuffer_size) {
	102	if (copy_to_user(ubuffer + size, append, 1))
	103	return -EFAULT;
	104
	105	size++;
	106	}
	107
	108	return size;
	109	}
	110
c6dc93d6	111	#ifdef DEBUG_KMEM
10946b02 AX	112	static int
	113	proc_domemused(struct ctl_table *table, int write,
	114	void __user buffer, size_t lenp, loff_t *ppos)
57d1b188	115	{
	116	int rc = 0;
	117	unsigned long min = 0, max = ~0, val;
80093b6f	118	spl_ctl_table dummy = *table;
57d1b188	119
	120	dummy.data = &val;
	121	dummy.proc_handler = &proc_dointvec;
	122	dummy.extra1 = &min;
	123	dummy.extra2 = &max;
	124
	125	if (write) {
	126	ppos += lenp;
	127	} else {
d04c8a56	128	# ifdef HAVE_ATOMIC64_T
550f1705	129	val = atomic64_read((atomic64_t *)table->data);
d04c8a56 BB	130	# else
	131	val = atomic_read((atomic_t *)table->data);
	132	# endif /* HAVE_ATOMIC64_T */
10946b02	133	rc = proc_doulongvec_minmax(&dummy, write, buffer, lenp, ppos);
57d1b188	134	}
57d1b188	135
10946b02	136	return (rc);
57d1b188	137	}
3336e29c	138
10946b02 AX	139	static int
	140	proc_doslab(struct ctl_table *table, int write,
	141	void __user buffer, size_t lenp, loff_t *ppos)
3336e29c BB	142	{
	143	int rc = 0;
	144	unsigned long min = 0, max = ~0, val = 0, mask;
80093b6f	145	spl_ctl_table dummy = *table;
3336e29c	146	spl_kmem_cache_t *skc;
3336e29c BB	147
	148	dummy.data = &val;
	149	dummy.proc_handler = &proc_dointvec;
	150	dummy.extra1 = &min;
	151	dummy.extra2 = &max;
	152
	153	if (write) {
	154	ppos += lenp;
	155	} else {
	156	down_read(&spl_kmem_cache_sem);
	157	mask = (unsigned long)table->data;
	158
	159	list_for_each_entry(skc, &spl_kmem_cache_list, skc_list) {
	160
	161	/* Only use slabs of the correct kmem/vmem type */
	162	if (!(skc->skc_flags & mask))
	163	continue;
	164
	165	/* Sum the specified field for selected slabs */
	166	switch (mask & (KMC_TOTAL \| KMC_ALLOC \| KMC_MAX)) {
	167	case KMC_TOTAL:
	168	val += skc->skc_slab_size * skc->skc_slab_total;
	169	break;
	170	case KMC_ALLOC:
	171	val += skc->skc_obj_size * skc->skc_obj_alloc;
	172	break;
	173	case KMC_MAX:
	174	val += skc->skc_obj_size * skc->skc_obj_max;
	175	break;
	176	}
	177	}
	178
	179	up_read(&spl_kmem_cache_sem);
10946b02	180	rc = proc_doulongvec_minmax(&dummy, write, buffer, lenp, ppos);
3336e29c BB	181	}
3336e29c BB	182
10946b02	183	return (rc);
3336e29c	184	}
c6dc93d6	185	#endif /* DEBUG_KMEM */
57d1b188	186
10946b02 AX	187	static int
	188	proc_dohostid(struct ctl_table *table, int write,
	189	void __user buffer, size_t lenp, loff_t *ppos)
57d1b188	190	{
57d1b188	191	int len, rc = 0;
57d1b188	192	char *end, str[32];
57d1b188	193
57d1b188	194	if (write) {
10946b02	195	/* We can't use proc_doulongvec_minmax() in the write
c95b308d	196	* case here because hostid while a hex value has no
a0b5ae8a	197	* leading 0x which confuses the helper function. */
57d1b188	198	rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
57d1b188	199	if (rc < 0)
10946b02	200	return (rc);
57d1b188	201
fa6f7d8f	202	spl_hostid = simple_strtoul(str, &end, 16);
a0b5ae8a	203	if (str == end)
10946b02	204	return (-EINVAL);
57d1b188	205
57d1b188	206	} else {
c95b308d	207	len = snprintf(str, sizeof(str), "%lx", spl_hostid);
57d1b188	208	if (*ppos >= len)
	209	rc = 0;
	210	else
3977f837	211	rc = proc_copyout_string(buffer,lenp,str+ppos,"\n");
57d1b188	212
	213	if (rc >= 0) {
	214	*lenp = rc;
	215	*ppos += rc;
	216	}
	217	}
	218
10946b02	219	return (rc);
4ab13d3b BB	220	}
4ab13d3b BB	221
ff449ac4	222	#ifdef DEBUG_KMEM
	223	static void
	224	slab_seq_show_headers(struct seq_file *f)
	225	{
d0a1038f BB	226	seq_printf(f,
	227	"--------------------- cache ----------"
	228	"--------------------------------------------- "
	229	"----- slab ------ "
165f13c3 BB	230	"---- object ----- "
165f13c3 BB	231	"--- emergency ---\n");
d0a1038f BB	232	seq_printf(f,
	233	"name "
	234	" flags size alloc slabsize objsize "
	235	"total alloc max "
165f13c3 BB	236	"total alloc max "
165f13c3 BB	237	"dlock alloc max\n");
ff449ac4	238	}
	239
	240	static int
	241	slab_seq_show(struct seq_file f, void p)
	242	{
242f539a	243	spl_kmem_cache_t *skc = p;
ff449ac4	244
242f539a	245	ASSERT(skc->skc_magic == SKC_MAGIC);
ff449ac4	246
9e4fb5c2 LG	247	/*
	248	* Backed by Linux slab see /proc/slabinfo.
	249	*/
	250	if (skc->skc_flags & KMC_SLAB)
	251	return (0);
	252
242f539a	253	spin_lock(&skc->skc_lock);
d0a1038f BB	254	seq_printf(f, "%-36s ", skc->skc_name);
d0a1038f BB	255	seq_printf(f, "0x%05lx %9lu %9lu %8u %8u "
165f13c3	256	"%5lu %5lu %5lu %5lu %5lu %5lu %5lu %5lu %5lu\n",
d0a1038f BB	257	(long unsigned)skc->skc_flags,
	258	(long unsigned)(skc->skc_slab_size * skc->skc_slab_total),
	259	(long unsigned)(skc->skc_obj_size * skc->skc_obj_alloc),
	260	(unsigned)skc->skc_slab_size,
	261	(unsigned)skc->skc_obj_size,
	262	(long unsigned)skc->skc_slab_total,
	263	(long unsigned)skc->skc_slab_alloc,
	264	(long unsigned)skc->skc_slab_max,
	265	(long unsigned)skc->skc_obj_total,
	266	(long unsigned)skc->skc_obj_alloc,
e2dcc6e2	267	(long unsigned)skc->skc_obj_max,
165f13c3	268	(long unsigned)skc->skc_obj_deadlock,
e2dcc6e2 BB	269	(long unsigned)skc->skc_obj_emergency,
e2dcc6e2 BB	270	(long unsigned)skc->skc_obj_emergency_max);
242f539a BB	271
242f539a BB	272	spin_unlock(&skc->skc_lock);
ff449ac4	273
	274	return 0;
	275	}
	276
	277	static void *
	278	slab_seq_start(struct seq_file f, loff_t pos)
	279	{
	280	struct list_head *p;
	281	loff_t n = *pos;
ff449ac4	282
	283	down_read(&spl_kmem_cache_sem);
	284	if (!n)
	285	slab_seq_show_headers(f);
	286
	287	p = spl_kmem_cache_list.next;
	288	while (n--) {
	289	p = p->next;
	290	if (p == &spl_kmem_cache_list)
10946b02	291	return (NULL);
ff449ac4	292	}
ff449ac4	293
10946b02	294	return (list_entry(p, spl_kmem_cache_t, skc_list));
ff449ac4	295	}
	296
	297	static void *
	298	slab_seq_next(struct seq_file f, void p, loff_t *pos)
	299	{
	300	spl_kmem_cache_t *skc = p;
ff449ac4	301
ff449ac4	302	++*pos;
10946b02	303	return ((skc->skc_list.next == &spl_kmem_cache_list) ?
3977f837	304	NULL : list_entry(skc->skc_list.next,spl_kmem_cache_t,skc_list));
ff449ac4	305	}
	306
	307	static void
	308	slab_seq_stop(struct seq_file f, void v)
	309	{
	310	up_read(&spl_kmem_cache_sem);
	311	}
	312
	313	static struct seq_operations slab_seq_ops = {
	314	.show = slab_seq_show,
	315	.start = slab_seq_start,
	316	.next = slab_seq_next,
	317	.stop = slab_seq_stop,
	318	};
	319
	320	static int
	321	proc_slab_open(struct inode inode, struct file filp)
	322	{
	323	return seq_open(filp, &slab_seq_ops);
	324	}
	325
	326	static struct file_operations proc_slab_operations = {
	327	.open = proc_slab_open,
	328	.read = seq_read,
	329	.llseek = seq_lseek,
	330	.release = seq_release,
	331	};
	332	#endif /* DEBUG_KMEM */
	333
57d1b188	334	#ifdef DEBUG_KMEM
9ab1ac14	335	static struct ctl_table spl_kmem_table[] = {
57d1b188	336	{
57d1b188	337	.procname = "kmem_used",
57d1b188	338	.data = &kmem_alloc_used,
d04c8a56	339	# ifdef HAVE_ATOMIC64_T
57d1b188	340	.maxlen = sizeof(atomic64_t),
d04c8a56 BB	341	# else
	342	.maxlen = sizeof(atomic_t),
	343	# endif /* HAVE_ATOMIC64_T */
57d1b188	344	.mode = 0444,
d04c8a56	345	.proc_handler = &proc_domemused,
57d1b188	346	},
57d1b188	347	{
57d1b188	348	.procname = "kmem_max",
	349	.data = &kmem_alloc_max,
	350	.maxlen = sizeof(unsigned long),
	351	.extra1 = &table_min,
	352	.extra2 = &table_max,
	353	.mode = 0444,
	354	.proc_handler = &proc_doulongvec_minmax,
	355	},
	356	{
3336e29c BB	357	.procname = "slab_kmem_total",
	358	.data = (void *)(KMC_KMEM \| KMC_TOTAL),
	359	.maxlen = sizeof(unsigned long),
	360	.extra1 = &table_min,
	361	.extra2 = &table_max,
	362	.mode = 0444,
	363	.proc_handler = &proc_doslab,
	364	},
	365	{
3336e29c BB	366	.procname = "slab_kmem_alloc",
	367	.data = (void *)(KMC_KMEM \| KMC_ALLOC),
	368	.maxlen = sizeof(unsigned long),
	369	.extra1 = &table_min,
	370	.extra2 = &table_max,
	371	.mode = 0444,
	372	.proc_handler = &proc_doslab,
	373	},
	374	{
3336e29c BB	375	.procname = "slab_kmem_max",
	376	.data = (void *)(KMC_KMEM \| KMC_MAX),
	377	.maxlen = sizeof(unsigned long),
	378	.extra1 = &table_min,
	379	.extra2 = &table_max,
	380	.mode = 0444,
	381	.proc_handler = &proc_doslab,
	382	},
	383	{
3336e29c BB	384	.procname = "slab_vmem_total",
	385	.data = (void *)(KMC_VMEM \| KMC_TOTAL),
	386	.maxlen = sizeof(unsigned long),
	387	.extra1 = &table_min,
	388	.extra2 = &table_max,
	389	.mode = 0444,
	390	.proc_handler = &proc_doslab,
	391	},
	392	{
3336e29c BB	393	.procname = "slab_vmem_alloc",
	394	.data = (void *)(KMC_VMEM \| KMC_ALLOC),
	395	.maxlen = sizeof(unsigned long),
	396	.extra1 = &table_min,
	397	.extra2 = &table_max,
	398	.mode = 0444,
	399	.proc_handler = &proc_doslab,
	400	},
	401	{
3336e29c BB	402	.procname = "slab_vmem_max",
	403	.data = (void *)(KMC_VMEM \| KMC_MAX),
	404	.maxlen = sizeof(unsigned long),
	405	.extra1 = &table_min,
	406	.extra2 = &table_max,
	407	.mode = 0444,
	408	.proc_handler = &proc_doslab,
	409	},
9ab1ac14	410	{0},
9ab1ac14	411	};
04a479f7	412	#endif /* DEBUG_KMEM */
04a479f7	413
04a479f7	414	static struct ctl_table spl_kstat_table[] = {
	415	{0},
	416	};
9ab1ac14	417
	418	static struct ctl_table spl_table[] = {
	419	/* NB No .strategy entries have been provided since
	420	* sysctl(8) prefers to go via /proc for portability.
	421	*/
	422	{
9ab1ac14	423	.procname = "version",
	424	.data = spl_version,
	425	.maxlen = sizeof(spl_version),
	426	.mode = 0444,
	427	.proc_handler = &proc_dostring,
	428	},
57d1b188	429	{
57d1b188	430	.procname = "hostid",
	431	.data = &spl_hostid,
	432	.maxlen = sizeof(unsigned long),
	433	.mode = 0644,
	434	.proc_handler = &proc_dohostid,
	435	},
9ab1ac14	436	#ifdef DEBUG_KMEM
9ab1ac14	437	{
9ab1ac14	438	.procname = "kmem",
	439	.mode = 0555,
	440	.child = spl_kmem_table,
	441	},
04a479f7	442	#endif
04a479f7	443	{
04a479f7	444	.procname = "kstat",
	445	.mode = 0555,
	446	.child = spl_kstat_table,
	447	},
57d1b188	448	{ 0 },
	449	};
	450
9ab1ac14	451	static struct ctl_table spl_dir[] = {
57d1b188	452	{
57d1b188	453	.procname = "spl",
	454	.mode = 0555,
	455	.child = spl_table,
	456	},
57d86234	457	{ 0 }
	458	};
	459
	460	static struct ctl_table spl_root[] = {
	461	{
10946b02 AX	462	#ifdef HAVE_CTL_NAME
	463	.ctl_name = CTL_KERN,
	464	#endif
57d86234	465	.procname = "kernel",
	466	.mode = 0555,
	467	.child = spl_dir,
	468	},
	469	{ 0 }
57d1b188	470	};
	471
	472	int
1114ae6a	473	spl_proc_init(void)
57d1b188	474	{
404992e3	475	int rc = 0;
57d1b188	476
10946b02	477	spl_header = register_sysctl_table(spl_root);
57d1b188	478	if (spl_header == NULL)
10946b02	479	return (-EUNATCH);
9ab1ac14	480
c30df9c8	481	proc_spl = proc_mkdir("spl", NULL);
10946b02 AX	482	if (proc_spl == NULL) {
	483	rc = -EUNATCH;
	484	goto out;
	485	}
404992e3	486
04a479f7	487	#ifdef DEBUG_KMEM
c30df9c8	488	proc_spl_kmem = proc_mkdir("kmem", proc_spl);
10946b02 AX	489	if (proc_spl_kmem == NULL) {
	490	rc = -EUNATCH;
	491	goto out;
	492	}
ff449ac4	493
80093b6f AX	494	proc_spl_kmem_slab = proc_create_data("slab", 0444,
80093b6f AX	495	proc_spl_kmem, &proc_slab_operations, NULL);
10946b02 AX	496	if (proc_spl_kmem_slab == NULL) {
	497	rc = -EUNATCH;
	498	goto out;
	499	}
ff449ac4	500
04a479f7	501	#endif /* DEBUG_KMEM */
04a479f7	502
c30df9c8	503	proc_spl_kstat = proc_mkdir("kstat", proc_spl);
10946b02 AX	504	if (proc_spl_kstat == NULL) {
	505	rc = -EUNATCH;
	506	goto out;
	507	}
404992e3	508	out:
c30df9c8	509	if (rc) {
c30df9c8	510	remove_proc_entry("kstat", proc_spl);
ff449ac4	511	#ifdef DEBUG_KMEM
ff449ac4	512	remove_proc_entry("slab", proc_spl_kmem);
c30df9c8	513	remove_proc_entry("kmem", proc_spl);
055ffd98	514	#endif
a02118a8	515	remove_proc_entry("spl", NULL);
10946b02	516	unregister_sysctl_table(spl_header);
c30df9c8	517	}
c30df9c8	518
10946b02	519	return (rc);
57d1b188	520	}
	521
	522	void
1114ae6a	523	spl_proc_fini(void)
57d1b188	524	{
c30df9c8	525	remove_proc_entry("kstat", proc_spl);
ff449ac4	526	#ifdef DEBUG_KMEM
ff449ac4	527	remove_proc_entry("slab", proc_spl_kmem);
c30df9c8	528	remove_proc_entry("kmem", proc_spl);
055ffd98	529	#endif
a02118a8	530	remove_proc_entry("spl", NULL);
c30df9c8	531
57d1b188	532	ASSERT(spl_header != NULL);
10946b02	533	unregister_sysctl_table(spl_header);
57d1b188	534	}