/* * This file is part of the SPL: Solaris Porting Layer. * * Copyright (c) 2008 Lawrence Livermore National Security, LLC. * Produced at Lawrence Livermore National Laboratory * Written by: * Brian Behlendorf , * Herb Wartens , * Jim Garlick * UCRL-CODE-235197 * * This 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. * * This 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 this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #ifdef DEBUG_SUBSYSTEM #undef DEBUG_SUBSYSTEM #endif #define DEBUG_SUBSYSTEM S_PROC #ifdef DEBUG_KMEM static unsigned long table_min = 0; static unsigned long table_max = ~0; #endif #ifdef CONFIG_SYSCTL static struct ctl_table_header *spl_header = NULL; #endif /* CONFIG_SYSCTL */ #if defined(DEBUG_MUTEX) || defined(DEBUG_KMEM) || defined(DEBUG_KSTAT) static struct proc_dir_entry *proc_spl = NULL; #ifdef DEBUG_MUTEX static struct proc_dir_entry *proc_spl_mutex = NULL; static struct proc_dir_entry *proc_spl_mutex_stats = NULL; #endif /* DEBUG_MUTEX */ #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 */ #ifdef DEBUG_KSTAT struct proc_dir_entry *proc_spl_kstat = NULL; #endif /* DEBUG_KSTAT */ #endif /* DEBUG_MUTEX || DEBUG_KMEM || DEBUG_KSTAT */ #ifdef HAVE_CTL_UNNUMBERED #define CTL_SPL CTL_UNNUMBERED #define CTL_SPL_DEBUG CTL_UNNUMBERED #define CTL_SPL_MUTEX CTL_UNNUMBERED #define CTL_SPL_KMEM CTL_UNNUMBERED #define CTL_SPL_KSTAT CTL_UNNUMBERED #define CTL_VERSION CTL_UNNUMBERED /* Version */ #define CTL_HOSTID CTL_UNNUMBERED /* Host id by /usr/bin/hostid */ #define CTL_HW_SERIAL CTL_UNNUMBERED /* HW serial number by hostid */ #define CTL_DEBUG_SUBSYS CTL_UNNUMBERED /* Debug subsystem */ #define CTL_DEBUG_MASK CTL_UNNUMBERED /* Debug mask */ #define CTL_DEBUG_PRINTK CTL_UNNUMBERED /* All messages to console */ #define CTL_DEBUG_MB CTL_UNNUMBERED /* Debug buffer size */ #define CTL_DEBUG_BINARY CTL_UNNUMBERED /* Binary data in buffer */ #define CTL_DEBUG_CATASTROPHE CTL_UNNUMBERED /* Set if BUG'd or panic'd */ #define CTL_DEBUG_PANIC_ON_BUG CTL_UNNUMBERED /* Should panic on BUG */ #define CTL_DEBUG_PATH CTL_UNNUMBERED /* Dump log location */ #define CTL_DEBUG_DUMP CTL_UNNUMBERED /* Dump debug buffer to file */ #define CTL_DEBUG_FORCE_BUG CTL_UNNUMBERED /* Hook to force a BUG */ #define CTL_DEBUG_STACK_SIZE CTL_UNNUMBERED /* Max observed stack size */ #define CTL_CONSOLE_RATELIMIT CTL_UNNUMBERED /* Ratelimit console messages */ #define CTL_CONSOLE_MAX_DELAY_CS CTL_UNNUMBERED /* Max delay skip messages */ #define CTL_CONSOLE_MIN_DELAY_CS CTL_UNNUMBERED /* Init delay skip messages */ #define CTL_CONSOLE_BACKOFF CTL_UNNUMBERED /* Delay increase factor */ #ifdef DEBUG_KMEM #define CTL_KMEM_KMEMUSED CTL_UNNUMBERED /* Alloc'd kmem bytes */ #define CTL_KMEM_KMEMMAX CTL_UNNUMBERED /* Max alloc'd by kmem bytes */ #define CTL_KMEM_VMEMUSED CTL_UNNUMBERED /* Alloc'd vmem bytes */ #define CTL_KMEM_VMEMMAX CTL_UNNUMBERED /* Max alloc'd by vmem bytes */ #define CTL_KMEM_ALLOC_FAILED CTL_UNNUMBERED /* Cache allocations failed */ #endif #define CTL_MUTEX_STATS CTL_UNNUMBERED /* Global mutex statistics */ #define CTL_MUTEX_STATS_PER CTL_UNNUMBERED /* Per mutex statistics */ #define CTL_MUTEX_SPIN_MAX CTL_UNNUMBERED /* Max mutex spin iterations */ #else /* HAVE_CTL_UNNUMBERED */ #define CTL_SPL 0x87 #define CTL_SPL_DEBUG 0x88 #define CTL_SPL_MUTEX 0x89 #define CTL_SPL_KMEM 0x90 #define CTL_SPL_KSTAT 0x91 enum { CTL_VERSION = 1, /* Version */ CTL_HOSTID, /* Host id reported by /usr/bin/hostid */ CTL_HW_SERIAL, /* Hardware serial number from hostid */ CTL_DEBUG_SUBSYS, /* Debug subsystem */ CTL_DEBUG_MASK, /* Debug mask */ CTL_DEBUG_PRINTK, /* Force all messages to console */ CTL_DEBUG_MB, /* Debug buffer size */ CTL_DEBUG_BINARY, /* Include binary data in buffer */ CTL_DEBUG_CATASTROPHE, /* Set if we have BUG'd or panic'd */ CTL_DEBUG_PANIC_ON_BUG, /* Set if we should panic on BUG */ CTL_DEBUG_PATH, /* Dump log location */ CTL_DEBUG_DUMP, /* Dump debug buffer to file */ CTL_DEBUG_FORCE_BUG, /* Hook to force a BUG */ CTL_DEBUG_STACK_SIZE, /* Max observed stack size */ CTL_CONSOLE_RATELIMIT, /* Ratelimit console messages */ CTL_CONSOLE_MAX_DELAY_CS, /* Max delay at which we skip messages */ CTL_CONSOLE_MIN_DELAY_CS, /* Init delay at which we skip messages */ CTL_CONSOLE_BACKOFF, /* Delay increase factor */ #ifdef DEBUG_KMEM CTL_KMEM_KMEMUSED, /* Alloc'd kmem bytes */ CTL_KMEM_KMEMMAX, /* Max alloc'd by kmem bytes */ CTL_KMEM_VMEMUSED, /* Alloc'd vmem bytes */ CTL_KMEM_VMEMMAX, /* Max alloc'd by vmem bytes */ #endif CTL_MUTEX_STATS, /* Global mutex statistics */ CTL_MUTEX_STATS_PER, /* Per mutex statistics */ CTL_MUTEX_SPIN_MAX, /* Maximum mutex spin iterations */ }; #endif /* HAVE_CTL_UNNUMBERED */ 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; } static int proc_dobitmasks(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { unsigned long *mask = table->data; int is_subsys = (mask == &spl_debug_subsys) ? 1 : 0; int is_printk = (mask == &spl_debug_printk) ? 1 : 0; int size = 512, rc; char *str; ENTRY; str = kmem_alloc(size, KM_SLEEP); if (str == NULL) RETURN(-ENOMEM); if (write) { rc = proc_copyin_string(str, size, buffer, *lenp); if (rc < 0) RETURN(rc); rc = spl_debug_str2mask(mask, str, is_subsys); /* Always print BUG/ASSERT to console, so keep this mask */ if (is_printk) *mask |= D_EMERG; *ppos += *lenp; } else { rc = spl_debug_mask2str(str, size, *mask, is_subsys); if (*ppos >= rc) rc = 0; else rc = proc_copyout_string(buffer, *lenp, str + *ppos, "\n"); if (rc >= 0) { *lenp = rc; *ppos += rc; } } kmem_free(str, size); RETURN(rc); } static int proc_debug_mb(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { char str[32]; int rc, len; ENTRY; if (write) { rc = proc_copyin_string(str, sizeof(str), buffer, *lenp); if (rc < 0) RETURN(rc); rc = spl_debug_set_mb(simple_strtoul(str, NULL, 0)); *ppos += *lenp; } else { len = snprintf(str, sizeof(str), "%d", spl_debug_get_mb()); 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 int proc_dump_kernel(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { ENTRY; if (write) { spl_debug_dumplog(0); *ppos += *lenp; } else { *lenp = 0; } RETURN(0); } static int proc_force_bug(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { ENTRY; if (write) { CERROR("Crashing due to forced SBUG\n"); SBUG(); /* Unreachable */ } else { *lenp = 0; } RETURN(0); } static int proc_console_max_delay_cs(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { int rc, max_delay_cs; struct ctl_table dummy = *table; long d; ENTRY; dummy.data = &max_delay_cs; dummy.proc_handler = &proc_dointvec; if (write) { max_delay_cs = 0; rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos); if (rc < 0) RETURN(rc); if (max_delay_cs <= 0) RETURN(-EINVAL); d = (max_delay_cs * HZ) / 100; if (d == 0 || d < spl_console_min_delay) RETURN(-EINVAL); spl_console_max_delay = d; } else { max_delay_cs = (spl_console_max_delay * 100) / HZ; rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos); } RETURN(rc); } static int proc_console_min_delay_cs(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { int rc, min_delay_cs; struct ctl_table dummy = *table; long d; ENTRY; dummy.data = &min_delay_cs; dummy.proc_handler = &proc_dointvec; if (write) { min_delay_cs = 0; rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos); if (rc < 0) RETURN(rc); if (min_delay_cs <= 0) RETURN(-EINVAL); d = (min_delay_cs * HZ) / 100; if (d == 0 || d > spl_console_max_delay) RETURN(-EINVAL); spl_console_min_delay = d; } else { min_delay_cs = (spl_console_min_delay * 100) / HZ; rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos); } RETURN(rc); } static int proc_console_backoff(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { int rc, backoff; struct ctl_table dummy = *table; ENTRY; dummy.data = &backoff; dummy.proc_handler = &proc_dointvec; if (write) { backoff = 0; rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos); if (rc < 0) RETURN(rc); if (backoff <= 0) RETURN(-EINVAL); spl_console_backoff = backoff; } else { backoff = spl_console_backoff; rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos); } RETURN(rc); } #ifdef DEBUG_KMEM static int proc_doatomic64(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { int rc = 0; unsigned long min = 0, max = ~0, val; struct ctl_table dummy = *table; ENTRY; dummy.data = &val; dummy.proc_handler = &proc_dointvec; dummy.extra1 = &min; dummy.extra2 = &max; if (write) { *ppos += *lenp; } else { val = atomic64_read((atomic64_t *)table->data); rc = proc_doulongvec_minmax(&dummy, write, filp, buffer, lenp, ppos); } RETURN(rc); } #endif /* DEBUG_KMEM */ static int proc_dohostid(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { int len, rc = 0; int32_t val; char *end, str[32]; ENTRY; if (write) { /* We can't use proc_doulongvec_minmax() in the write * case hear 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); val = simple_strtol(str, &end, 16); if (str == end) RETURN(-EINVAL); spl_hostid = (long)val; sprintf(hw_serial, "%u", (val >= 0) ? val : -val); *ppos += *lenp; } 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_MUTEX static void mutex_seq_show_headers(struct seq_file *f) { seq_printf(f, "%-36s %-4s %-16s\t" "e_tot\te_nh\te_sp\te_sl\tte_tot\tte_nh\n", "name", "type", "owner"); } static int mutex_seq_show(struct seq_file *f, void *p) { kmutex_t *mp = p; char t = 'X'; int i; ASSERT(mp->km_magic == KM_MAGIC); switch (mp->km_type) { case MUTEX_DEFAULT: t = 'D'; break; case MUTEX_SPIN: t = 'S'; break; case MUTEX_ADAPTIVE: t = 'A'; break; default: SBUG(); } seq_printf(f, "%-36s %c ", mp->km_name, t); if (mp->km_owner) seq_printf(f, "%p\t", mp->km_owner); else seq_printf(f, "%-16s\t", ""); for (i = 0; i < MUTEX_STATS_SIZE; i++) seq_printf(f, "%d%c", mp->km_stats[i], (i + 1 == MUTEX_STATS_SIZE) ? '\n' : '\t'); return 0; } static void * mutex_seq_start(struct seq_file *f, loff_t *pos) { struct list_head *p; loff_t n = *pos; ENTRY; spin_lock(&mutex_stats_lock); if (!n) mutex_seq_show_headers(f); p = mutex_stats_list.next; while (n--) { p = p->next; if (p == &mutex_stats_list) RETURN(NULL); } RETURN(list_entry(p, kmutex_t, km_list)); } static void * mutex_seq_next(struct seq_file *f, void *p, loff_t *pos) { kmutex_t *mp = p; ENTRY; ++*pos; RETURN((mp->km_list.next == &mutex_stats_list) ? NULL : list_entry(mp->km_list.next, kmutex_t, km_list)); } static void mutex_seq_stop(struct seq_file *f, void *v) { spin_unlock(&mutex_stats_lock); } static struct seq_operations mutex_seq_ops = { .show = mutex_seq_show, .start = mutex_seq_start, .next = mutex_seq_next, .stop = mutex_seq_stop, }; static int proc_mutex_open(struct inode *inode, struct file *filp) { return seq_open(filp, &mutex_seq_ops); } static struct file_operations proc_mutex_operations = { .open = proc_mutex_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; #endif /* DEBUG_MUTEX */ #ifdef DEBUG_KMEM static void slab_seq_show_headers(struct seq_file *f) { seq_printf(f, "%-36s\n", "name"); } 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, "%u %u %u - %lu %lu %lu - %lu %lu %lu - %lu %lu %lu\n", (unsigned)skc->skc_obj_size, (unsigned)skc->skc_slab_objs, (unsigned)skc->skc_slab_size, (long unsigned)skc->skc_slab_fail, (long unsigned)skc->skc_slab_create, (long unsigned)skc->skc_slab_destroy, (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); 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; ENTRY; 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; ENTRY; ++*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 */ 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}, }; #ifdef DEBUG_MUTEX static struct ctl_table spl_mutex_table[] = { { .ctl_name = CTL_MUTEX_STATS, .procname = "stats", .data = &mutex_stats, .maxlen = sizeof(int) * MUTEX_STATS_SIZE, .mode = 0444, .proc_handler = &proc_dointvec, }, { .ctl_name = CTL_MUTEX_SPIN_MAX, .procname = "spin_max", .data = &mutex_spin_max, .maxlen = sizeof(int), .mode = 0644, .proc_handler = &proc_dointvec, }, {0}, }; #endif /* DEBUG_MUTEX */ #ifdef DEBUG_KMEM static struct ctl_table spl_kmem_table[] = { { .ctl_name = CTL_KMEM_KMEMUSED, .procname = "kmem_used", .data = &kmem_alloc_used, .maxlen = sizeof(atomic64_t), .mode = 0444, .proc_handler = &proc_doatomic64, }, { .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, .maxlen = sizeof(atomic64_t), .mode = 0444, .proc_handler = &proc_doatomic64, }, { .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, }, {0}, }; #endif /* DEBUG_KMEM */ #ifdef DEBUG_KSTAT static struct ctl_table spl_kstat_table[] = { {0}, }; #endif /* DEBUG_KSTAT */ 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, }, { .ctl_name = CTL_HW_SERIAL, .procname = "hw_serial", .data = hw_serial, .maxlen = sizeof(hw_serial), .mode = 0444, .proc_handler = &proc_dostring, }, { .ctl_name = CTL_SPL_DEBUG, .procname = "debug", .mode = 0555, .child = spl_debug_table, }, #ifdef DEBUG_MUTEX { .ctl_name = CTL_SPL_MUTEX, .procname = "mutex", .mode = 0555, .child = spl_mutex_table, }, #endif #ifdef DEBUG_KMEM { .ctl_name = CTL_SPL_KMEM, .procname = "kmem", .mode = 0555, .child = spl_kmem_table, }, #endif #ifdef DEBUG_KSTAT { .ctl_name = CTL_SPL_KSTAT, .procname = "kstat", .mode = 0555, .child = spl_kstat_table, }, #endif { 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 } }; static int proc_dir_entry_match(int len, const char *name, struct proc_dir_entry *de) { if (de->namelen != len) return 0; return !memcmp(name, de->name, len); } struct proc_dir_entry * proc_dir_entry_find(struct proc_dir_entry *root, const char *str) { struct proc_dir_entry *de; for (de = root->subdir; de; de = de->next) if (proc_dir_entry_match(strlen(str), str, de)) return de; return NULL; } int proc_dir_entries(struct proc_dir_entry *root) { struct proc_dir_entry *de; int i = 0; for (de = root->subdir; de; de = de->next) i++; return i; } int proc_init(void) { int rc = 0; ENTRY; #ifdef CONFIG_SYSCTL spl_header = spl_register_sysctl_table(spl_root, 0); if (spl_header == NULL) RETURN(-EUNATCH); #endif /* CONFIG_SYSCTL */ #if defined(DEBUG_MUTEX) || defined(DEBUG_KMEM) || defined(DEBUG_KSTAT) proc_spl = proc_mkdir("spl", NULL); if (proc_spl == NULL) GOTO(out, rc = -EUNATCH); #ifdef DEBUG_MUTEX proc_spl_mutex = proc_mkdir("mutex", proc_spl); if (proc_spl_mutex == NULL) GOTO(out, rc = -EUNATCH); proc_spl_mutex_stats = create_proc_entry("stats_per", 0444, proc_spl_mutex); if (proc_spl_mutex_stats == NULL) GOTO(out, rc = -EUNATCH); proc_spl_mutex_stats->proc_fops = &proc_mutex_operations; #endif /* DEBUG_MUTEX */ #ifdef DEBUG_KMEM proc_spl_kmem = proc_mkdir("kmem", proc_spl); if (proc_spl_kmem == NULL) GOTO(out, rc = -EUNATCH); proc_spl_kmem_slab = create_proc_entry("slab", 0444, proc_spl_kmem); if (proc_spl_kmem_slab == NULL) GOTO(out, rc = -EUNATCH); proc_spl_kmem_slab->proc_fops = &proc_slab_operations; #endif /* DEBUG_KMEM */ #ifdef DEBUG_KSTAT proc_spl_kstat = proc_mkdir("kstat", proc_spl); if (proc_spl_kstat == NULL) GOTO(out, rc = -EUNATCH); #endif /* DEBUG_KSTAT */ out: if (rc) { remove_proc_entry("kstat", proc_spl); #ifdef DEBUG_KMEM remove_proc_entry("slab", proc_spl_kmem); #endif remove_proc_entry("kmem", proc_spl); #ifdef DEBUG_MUTEX remove_proc_entry("stats_per", proc_spl_mutex); #endif remove_proc_entry("mutex", proc_spl); remove_proc_entry("spl", NULL); #ifdef CONFIG_SYSCTL spl_unregister_sysctl_table(spl_header); #endif /* CONFIG_SYSCTL */ } #endif /* DEBUG_MUTEX || DEBUG_KMEM || DEBUG_KSTAT */ RETURN(rc); } void proc_fini(void) { ENTRY; #if defined(DEBUG_MUTEX) || defined(DEBUG_KMEM) || defined(DEBUG_KSTAT) remove_proc_entry("kstat", proc_spl); #ifdef DEBUG_KMEM remove_proc_entry("slab", proc_spl_kmem); #endif remove_proc_entry("kmem", proc_spl); #ifdef DEBUG_MUTEX remove_proc_entry("stats_per", proc_spl_mutex); #endif remove_proc_entry("mutex", proc_spl); remove_proc_entry("spl", NULL); #endif /* DEBUG_MUTEX || DEBUG_KMEM || DEBUG_KSTAT */ #ifdef CONFIG_SYSCTL ASSERT(spl_header != NULL); spl_unregister_sysctl_table(spl_header); #endif /* CONFIG_SYSCTL */ EXIT; }