[mirror_spl.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 <linux/kmod.h>
#include <linux/seq_file.h>
#include <linux/proc_compat.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 = "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,
        },
        {
                .procname = "vmem_max",
                .data     = &vmem_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>
	28	#include <sys/kstat.h>
	29	#include <linux/kmod.h>
	30	#include <linux/seq_file.h>
	31	#include <linux/proc_compat.h>
e3c4d448	32	#include <linux/version.h>
57d1b188	33
e3c4d448 RY	34	#if defined(CONSTIFY_PLUGIN) && LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
	35	typedef struct ctl_table __no_const spl_ctl_table;
	36	#else
	37	typedef struct ctl_table spl_ctl_table;
	38	#endif
	39
404992e3	40	#ifdef DEBUG_KMEM
57d1b188	41	static unsigned long table_min = 0;
57d1b188	42	static unsigned long table_max = ~0;
404992e3	43	#endif
404992e3	44
404992e3	45	static struct ctl_table_header *spl_header = NULL;
c30df9c8	46	static struct proc_dir_entry *proc_spl = NULL;
04a479f7	47	#ifdef DEBUG_KMEM
c30df9c8	48	static struct proc_dir_entry *proc_spl_kmem = NULL;
ff449ac4	49	static struct proc_dir_entry *proc_spl_kmem_slab = NULL;
c30df9c8	50	#endif /* DEBUG_KMEM */
c30df9c8	51	struct proc_dir_entry *proc_spl_kstat = NULL;
57d1b188	52
57d1b188	53	static int
	54	proc_copyin_string(char *kbuffer, int kbuffer_size,
	55	const char *ubuffer, int ubuffer_size)
	56	{
	57	int size;
	58
	59	if (ubuffer_size > kbuffer_size)
	60	return -EOVERFLOW;
	61
	62	if (copy_from_user((void )kbuffer, (void )ubuffer, ubuffer_size))
	63	return -EFAULT;
	64
	65	/* strip trailing whitespace */
	66	size = strnlen(kbuffer, ubuffer_size);
	67	while (size-- >= 0)
	68	if (!isspace(kbuffer[size]))
	69	break;
	70
	71	/* empty string */
	72	if (size < 0)
	73	return -EINVAL;
	74
	75	/* no space to terminate */
	76	if (size == kbuffer_size)
	77	return -EOVERFLOW;
	78
	79	kbuffer[size + 1] = 0;
	80	return 0;
	81	}
	82
	83	static int
	84	proc_copyout_string(char *ubuffer, int ubuffer_size,
	85	const char kbuffer, char append)
	86	{
	87	/* NB if 'append' != NULL, it's a single character to append to the
	88	* copied out string - usually "\n", for /proc entries and
	89	* (i.e. a terminating zero byte) for sysctl entries
	90	*/
	91	int size = MIN(strlen(kbuffer), ubuffer_size);
	92
	93	if (copy_to_user(ubuffer, kbuffer, size))
	94	return -EFAULT;
	95
	96	if (append != NULL && size < ubuffer_size) {
	97	if (copy_to_user(ubuffer + size, append, 1))
	98	return -EFAULT;
	99
	100	size++;
	101	}
	102
	103	return size;
	104	}
	105
c6dc93d6	106	#ifdef DEBUG_KMEM
0fac9c9e BB	107	static int
	108	proc_domemused(struct ctl_table *table, int write,
	109	void __user buffer, size_t lenp, loff_t *ppos)
57d1b188	110	{
	111	int rc = 0;
	112	unsigned long min = 0, max = ~0, val;
e3c4d448	113	spl_ctl_table dummy = *table;
57d1b188	114
	115	dummy.data = &val;
	116	dummy.proc_handler = &proc_dointvec;
	117	dummy.extra1 = &min;
	118	dummy.extra2 = &max;
	119
	120	if (write) {
	121	ppos += lenp;
	122	} else {
d04c8a56	123	# ifdef HAVE_ATOMIC64_T
550f1705	124	val = atomic64_read((atomic64_t *)table->data);
d04c8a56 BB	125	# else
	126	val = atomic_read((atomic_t *)table->data);
	127	# endif /* HAVE_ATOMIC64_T */
0fac9c9e	128	rc = proc_doulongvec_minmax(&dummy, write, buffer, lenp, ppos);
57d1b188	129	}
57d1b188	130
8d9a23e8	131	return (rc);
57d1b188	132	}
3336e29c	133
0fac9c9e BB	134	static int
	135	proc_doslab(struct ctl_table *table, int write,
	136	void __user buffer, size_t lenp, loff_t *ppos)
3336e29c BB	137	{
	138	int rc = 0;
	139	unsigned long min = 0, max = ~0, val = 0, mask;
e3c4d448	140	spl_ctl_table dummy = *table;
3336e29c	141	spl_kmem_cache_t *skc;
3336e29c BB	142
	143	dummy.data = &val;
	144	dummy.proc_handler = &proc_dointvec;
	145	dummy.extra1 = &min;
	146	dummy.extra2 = &max;
	147
	148	if (write) {
	149	ppos += lenp;
	150	} else {
	151	down_read(&spl_kmem_cache_sem);
	152	mask = (unsigned long)table->data;
	153
	154	list_for_each_entry(skc, &spl_kmem_cache_list, skc_list) {
	155
	156	/* Only use slabs of the correct kmem/vmem type */
	157	if (!(skc->skc_flags & mask))
	158	continue;
	159
	160	/* Sum the specified field for selected slabs */
	161	switch (mask & (KMC_TOTAL \| KMC_ALLOC \| KMC_MAX)) {
	162	case KMC_TOTAL:
	163	val += skc->skc_slab_size * skc->skc_slab_total;
	164	break;
	165	case KMC_ALLOC:
	166	val += skc->skc_obj_size * skc->skc_obj_alloc;
	167	break;
	168	case KMC_MAX:
	169	val += skc->skc_obj_size * skc->skc_obj_max;
	170	break;
	171	}
	172	}
	173
	174	up_read(&spl_kmem_cache_sem);
0fac9c9e	175	rc = proc_doulongvec_minmax(&dummy, write, buffer, lenp, ppos);
3336e29c BB	176	}
3336e29c BB	177
8d9a23e8	178	return (rc);
3336e29c	179	}
c6dc93d6	180	#endif /* DEBUG_KMEM */
57d1b188	181
0fac9c9e BB	182	static int
	183	proc_dohostid(struct ctl_table *table, int write,
	184	void __user buffer, size_t lenp, loff_t *ppos)
57d1b188	185	{
57d1b188	186	int len, rc = 0;
57d1b188	187	char *end, str[32];
57d1b188	188
57d1b188	189	if (write) {
0fac9c9e	190	/* We can't use proc_doulongvec_minmax() in the write
c95b308d	191	* case here because hostid while a hex value has no
a0b5ae8a	192	* leading 0x which confuses the helper function. */
57d1b188	193	rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
57d1b188	194	if (rc < 0)
8d9a23e8	195	return (rc);
57d1b188	196
fa6f7d8f	197	spl_hostid = simple_strtoul(str, &end, 16);
a0b5ae8a	198	if (str == end)
8d9a23e8	199	return (-EINVAL);
57d1b188	200
57d1b188	201	} else {
c95b308d	202	len = snprintf(str, sizeof(str), "%lx", spl_hostid);
57d1b188	203	if (*ppos >= len)
	204	rc = 0;
	205	else
3977f837	206	rc = proc_copyout_string(buffer,lenp,str+ppos,"\n");
57d1b188	207
	208	if (rc >= 0) {
	209	*lenp = rc;
	210	*ppos += rc;
	211	}
	212	}
	213
8d9a23e8	214	return (rc);
57d1b188	215	}
57d1b188	216
ff449ac4	217	#ifdef DEBUG_KMEM
	218	static void
	219	slab_seq_show_headers(struct seq_file *f)
	220	{
d0a1038f BB	221	seq_printf(f,
	222	"--------------------- cache ----------"
	223	"--------------------------------------------- "
	224	"----- slab ------ "
165f13c3 BB	225	"---- object ----- "
165f13c3 BB	226	"--- emergency ---\n");
d0a1038f BB	227	seq_printf(f,
	228	"name "
	229	" flags size alloc slabsize objsize "
	230	"total alloc max "
165f13c3 BB	231	"total alloc max "
165f13c3 BB	232	"dlock alloc max\n");
ff449ac4	233	}
	234
	235	static int
	236	slab_seq_show(struct seq_file f, void p)
	237	{
242f539a	238	spl_kmem_cache_t *skc = p;
ff449ac4	239
242f539a	240	ASSERT(skc->skc_magic == SKC_MAGIC);
ff449ac4	241
a073aeb0 BB	242	/*
	243	* Backed by Linux slab see /proc/slabinfo.
	244	*/
	245	if (skc->skc_flags & KMC_SLAB)
	246	return (0);
	247
242f539a	248	spin_lock(&skc->skc_lock);
d0a1038f BB	249	seq_printf(f, "%-36s ", skc->skc_name);
d0a1038f BB	250	seq_printf(f, "0x%05lx %9lu %9lu %8u %8u "
165f13c3	251	"%5lu %5lu %5lu %5lu %5lu %5lu %5lu %5lu %5lu\n",
d0a1038f BB	252	(long unsigned)skc->skc_flags,
	253	(long unsigned)(skc->skc_slab_size * skc->skc_slab_total),
	254	(long unsigned)(skc->skc_obj_size * skc->skc_obj_alloc),
	255	(unsigned)skc->skc_slab_size,
	256	(unsigned)skc->skc_obj_size,
	257	(long unsigned)skc->skc_slab_total,
	258	(long unsigned)skc->skc_slab_alloc,
	259	(long unsigned)skc->skc_slab_max,
	260	(long unsigned)skc->skc_obj_total,
	261	(long unsigned)skc->skc_obj_alloc,
e2dcc6e2	262	(long unsigned)skc->skc_obj_max,
165f13c3	263	(long unsigned)skc->skc_obj_deadlock,
e2dcc6e2 BB	264	(long unsigned)skc->skc_obj_emergency,
e2dcc6e2 BB	265	(long unsigned)skc->skc_obj_emergency_max);
242f539a BB	266
242f539a BB	267	spin_unlock(&skc->skc_lock);
ff449ac4	268
	269	return 0;
	270	}
	271
	272	static void *
	273	slab_seq_start(struct seq_file f, loff_t pos)
	274	{
	275	struct list_head *p;
	276	loff_t n = *pos;
ff449ac4	277
	278	down_read(&spl_kmem_cache_sem);
	279	if (!n)
	280	slab_seq_show_headers(f);
	281
	282	p = spl_kmem_cache_list.next;
	283	while (n--) {
	284	p = p->next;
	285	if (p == &spl_kmem_cache_list)
8d9a23e8	286	return (NULL);
ff449ac4	287	}
ff449ac4	288
8d9a23e8	289	return (list_entry(p, spl_kmem_cache_t, skc_list));
ff449ac4	290	}
	291
	292	static void *
	293	slab_seq_next(struct seq_file f, void p, loff_t *pos)
	294	{
	295	spl_kmem_cache_t *skc = p;
ff449ac4	296
ff449ac4	297	++*pos;
8d9a23e8	298	return ((skc->skc_list.next == &spl_kmem_cache_list) ?
3977f837	299	NULL : list_entry(skc->skc_list.next,spl_kmem_cache_t,skc_list));
ff449ac4	300	}
	301
	302	static void
	303	slab_seq_stop(struct seq_file f, void v)
	304	{
	305	up_read(&spl_kmem_cache_sem);
	306	}
	307
	308	static struct seq_operations slab_seq_ops = {
	309	.show = slab_seq_show,
	310	.start = slab_seq_start,
	311	.next = slab_seq_next,
	312	.stop = slab_seq_stop,
	313	};
	314
	315	static int
	316	proc_slab_open(struct inode inode, struct file filp)
	317	{
	318	return seq_open(filp, &slab_seq_ops);
	319	}
	320
	321	static struct file_operations proc_slab_operations = {
	322	.open = proc_slab_open,
	323	.read = seq_read,
	324	.llseek = seq_lseek,
	325	.release = seq_release,
	326	};
	327	#endif /* DEBUG_KMEM */
	328
57d1b188	329	#ifdef DEBUG_KMEM
9ab1ac14	330	static struct ctl_table spl_kmem_table[] = {
57d1b188	331	{
57d1b188	332	.procname = "kmem_used",
57d1b188	333	.data = &kmem_alloc_used,
d04c8a56	334	# ifdef HAVE_ATOMIC64_T
57d1b188	335	.maxlen = sizeof(atomic64_t),
d04c8a56 BB	336	# else
	337	.maxlen = sizeof(atomic_t),
	338	# endif /* HAVE_ATOMIC64_T */
57d1b188	339	.mode = 0444,
d04c8a56	340	.proc_handler = &proc_domemused,
57d1b188	341	},
57d1b188	342	{
57d1b188	343	.procname = "kmem_max",
	344	.data = &kmem_alloc_max,
	345	.maxlen = sizeof(unsigned long),
	346	.extra1 = &table_min,
	347	.extra2 = &table_max,
	348	.mode = 0444,
	349	.proc_handler = &proc_doulongvec_minmax,
	350	},
	351	{
57d1b188	352	.procname = "vmem_used",
57d1b188	353	.data = &vmem_alloc_used,
d04c8a56	354	# ifdef HAVE_ATOMIC64_T
57d1b188	355	.maxlen = sizeof(atomic64_t),
d04c8a56 BB	356	# else
	357	.maxlen = sizeof(atomic_t),
	358	# endif /* HAVE_ATOMIC64_T */
57d1b188	359	.mode = 0444,
d04c8a56	360	.proc_handler = &proc_domemused,
57d1b188	361	},
57d1b188	362	{
57d1b188	363	.procname = "vmem_max",
	364	.data = &vmem_alloc_max,
	365	.maxlen = sizeof(unsigned long),
	366	.extra1 = &table_min,
	367	.extra2 = &table_max,
	368	.mode = 0444,
	369	.proc_handler = &proc_doulongvec_minmax,
	370	},
3336e29c	371	{
3336e29c BB	372	.procname = "slab_kmem_total",
	373	.data = (void *)(KMC_KMEM \| KMC_TOTAL),
	374	.maxlen = sizeof(unsigned long),
	375	.extra1 = &table_min,
	376	.extra2 = &table_max,
	377	.mode = 0444,
	378	.proc_handler = &proc_doslab,
	379	},
	380	{
3336e29c BB	381	.procname = "slab_kmem_alloc",
	382	.data = (void *)(KMC_KMEM \| KMC_ALLOC),
	383	.maxlen = sizeof(unsigned long),
	384	.extra1 = &table_min,
	385	.extra2 = &table_max,
	386	.mode = 0444,
	387	.proc_handler = &proc_doslab,
	388	},
	389	{
3336e29c BB	390	.procname = "slab_kmem_max",
	391	.data = (void *)(KMC_KMEM \| KMC_MAX),
	392	.maxlen = sizeof(unsigned long),
	393	.extra1 = &table_min,
	394	.extra2 = &table_max,
	395	.mode = 0444,
	396	.proc_handler = &proc_doslab,
	397	},
	398	{
3336e29c BB	399	.procname = "slab_vmem_total",
	400	.data = (void *)(KMC_VMEM \| KMC_TOTAL),
	401	.maxlen = sizeof(unsigned long),
	402	.extra1 = &table_min,
	403	.extra2 = &table_max,
	404	.mode = 0444,
	405	.proc_handler = &proc_doslab,
	406	},
	407	{
3336e29c BB	408	.procname = "slab_vmem_alloc",
	409	.data = (void *)(KMC_VMEM \| KMC_ALLOC),
	410	.maxlen = sizeof(unsigned long),
	411	.extra1 = &table_min,
	412	.extra2 = &table_max,
	413	.mode = 0444,
	414	.proc_handler = &proc_doslab,
	415	},
	416	{
3336e29c BB	417	.procname = "slab_vmem_max",
	418	.data = (void *)(KMC_VMEM \| KMC_MAX),
	419	.maxlen = sizeof(unsigned long),
	420	.extra1 = &table_min,
	421	.extra2 = &table_max,
	422	.mode = 0444,
	423	.proc_handler = &proc_doslab,
	424	},
9ab1ac14	425	{0},
9ab1ac14	426	};
04a479f7	427	#endif /* DEBUG_KMEM */
04a479f7	428
04a479f7	429	static struct ctl_table spl_kstat_table[] = {
	430	{0},
	431	};
9ab1ac14	432
	433	static struct ctl_table spl_table[] = {
	434	/* NB No .strategy entries have been provided since
	435	* sysctl(8) prefers to go via /proc for portability.
	436	*/
	437	{
9ab1ac14	438	.procname = "version",
	439	.data = spl_version,
	440	.maxlen = sizeof(spl_version),
	441	.mode = 0444,
	442	.proc_handler = &proc_dostring,
	443	},
57d1b188	444	{
57d1b188	445	.procname = "hostid",
	446	.data = &spl_hostid,
	447	.maxlen = sizeof(unsigned long),
	448	.mode = 0644,
	449	.proc_handler = &proc_dohostid,
	450	},
9ab1ac14	451	#ifdef DEBUG_KMEM
9ab1ac14	452	{
9ab1ac14	453	.procname = "kmem",
	454	.mode = 0555,
	455	.child = spl_kmem_table,
	456	},
04a479f7	457	#endif
04a479f7	458	{
04a479f7	459	.procname = "kstat",
	460	.mode = 0555,
	461	.child = spl_kstat_table,
	462	},
57d1b188	463	{ 0 },
	464	};
	465
9ab1ac14	466	static struct ctl_table spl_dir[] = {
57d1b188	467	{
57d1b188	468	.procname = "spl",
	469	.mode = 0555,
	470	.child = spl_table,
	471	},
57d86234	472	{ 0 }
	473	};
	474
	475	static struct ctl_table spl_root[] = {
	476	{
9c91800d BB	477	#ifdef HAVE_CTL_NAME
	478	.ctl_name = CTL_KERN,
	479	#endif
57d86234	480	.procname = "kernel",
	481	.mode = 0555,
	482	.child = spl_dir,
	483	},
	484	{ 0 }
57d1b188	485	};
	486
	487	int
1114ae6a	488	spl_proc_init(void)
57d1b188	489	{
404992e3	490	int rc = 0;
57d1b188	491
b38bf6a4	492	spl_header = register_sysctl_table(spl_root);
57d1b188	493	if (spl_header == NULL)
8d9a23e8	494	return (-EUNATCH);
9ab1ac14	495
c30df9c8	496	proc_spl = proc_mkdir("spl", NULL);
8d9a23e8 BB	497	if (proc_spl == NULL) {
	498	rc = -EUNATCH;
	499	goto out;
	500	}
404992e3	501
04a479f7	502	#ifdef DEBUG_KMEM
c30df9c8	503	proc_spl_kmem = proc_mkdir("kmem", proc_spl);
8d9a23e8 BB	504	if (proc_spl_kmem == NULL) {
	505	rc = -EUNATCH;
	506	goto out;
	507	}
ff449ac4	508
f2a745c4 RY	509	proc_spl_kmem_slab = proc_create_data("slab", 0444,
f2a745c4 RY	510	proc_spl_kmem, &proc_slab_operations, NULL);
8d9a23e8 BB	511	if (proc_spl_kmem_slab == NULL) {
	512	rc = -EUNATCH;
	513	goto out;
	514	}
ff449ac4	515
04a479f7	516	#endif /* DEBUG_KMEM */
04a479f7	517
c30df9c8	518	proc_spl_kstat = proc_mkdir("kstat", proc_spl);
8d9a23e8 BB	519	if (proc_spl_kstat == NULL) {
	520	rc = -EUNATCH;
	521	goto out;
	522	}
404992e3	523	out:
c30df9c8	524	if (rc) {
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);
b38bf6a4	531	unregister_sysctl_table(spl_header);
c30df9c8	532	}
c30df9c8	533
8d9a23e8	534	return (rc);
57d1b188	535	}
	536
	537	void
1114ae6a	538	spl_proc_fini(void)
57d1b188	539	{
c30df9c8	540	remove_proc_entry("kstat", proc_spl);
ff449ac4	541	#ifdef DEBUG_KMEM
ff449ac4	542	remove_proc_entry("slab", proc_spl_kmem);
c30df9c8	543	remove_proc_entry("kmem", proc_spl);
055ffd98	544	#endif
a02118a8	545	remove_proc_entry("spl", NULL);
c30df9c8	546
57d1b188	547	ASSERT(spl_header != NULL);
b38bf6a4	548	unregister_sysctl_table(spl_header);
57d1b188	549	}