--- /dev/null
+/*****************************************************************************\
+ * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
+ * Copyright (C) 2007 The Regents of the University of California.
+ * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
+ * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
+ * UCRL-CODE-235197
+ *
+ * This file is part of the SPL, Solaris Porting Layer.
+ * For details, see <http://zfsonlinux.org/>.
+ *
+ * The SPL is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * The SPL is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with the SPL. If not, see <http://www.gnu.org/licenses/>.
+ *****************************************************************************
+ * 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
+
+static unsigned long table_min = 0;
+static unsigned long table_max = ~0;
+
+static struct ctl_table_header *spl_header = NULL;
+static struct proc_dir_entry *proc_spl = NULL;
+static struct proc_dir_entry *proc_spl_kmem = NULL;
+static struct proc_dir_entry *proc_spl_kmem_slab = NULL;
+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);
+}
+#endif /* DEBUG_KMEM */
+
+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);
+}
+
+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);
+}
+
+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,
+};
+
+static struct ctl_table spl_kmem_table[] = {
+#ifdef DEBUG_KMEM
+ {
+ .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,
+ },
+#endif /* DEBUG_KMEM */
+ {
+ .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},
+};
+
+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,
+ },
+ {
+ .procname = "kmem",
+ .mode = 0555,
+ .child = spl_kmem_table,
+ },
+ {
+ .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;
+ }
+
+ 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;
+ }
+
+ 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);
+ remove_proc_entry("slab", proc_spl_kmem);
+ remove_proc_entry("kmem", proc_spl);
+ remove_proc_entry("spl", NULL);
+ unregister_sysctl_table(spl_header);
+ }
+
+ return (rc);
+}
+
+void
+spl_proc_fini(void)
+{
+ remove_proc_entry("kstat", proc_spl);
+ remove_proc_entry("slab", proc_spl_kmem);
+ remove_proc_entry("kmem", proc_spl);
+ remove_proc_entry("spl", NULL);
+
+ ASSERT(spl_header != NULL);
+ unregister_sysctl_table(spl_header);
+}
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