-static cfs_sysctl_table_t obd_table[] = {
- {
- .ctl_name = OBD_FAIL_LOC,
- .procname = "fail_loc",
- .data = &obd_fail_loc,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_fail_loc
- },
- {
- .ctl_name = OBD_FAIL_VAL,
- .procname = "fail_val",
- .data = &obd_fail_val,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec
- },
- {
- .ctl_name = OBD_TIMEOUT,
- .procname = "timeout",
- .data = &obd_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_set_timeout
- },
- {
- .ctl_name = OBD_DEBUG_PEER_ON_TIMEOUT,
- .procname = "debug_peer_on_timeout",
- .data = &obd_debug_peer_on_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec
- },
- {
- .ctl_name = OBD_DUMP_ON_TIMEOUT,
- .procname = "dump_on_timeout",
- .data = &obd_dump_on_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec
- },
- {
- .ctl_name = OBD_DUMP_ON_EVICTION,
- .procname = "dump_on_eviction",
- .data = &obd_dump_on_eviction,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec
- },
- {
- .ctl_name = OBD_MEMUSED,
- .procname = "memused",
- .data = NULL,
- .maxlen = 0,
- .mode = 0444,
- .proc_handler = &proc_memory_alloc
- },
- {
- .ctl_name = OBD_PAGESUSED,
- .procname = "pagesused",
- .data = NULL,
- .maxlen = 0,
- .mode = 0444,
- .proc_handler = &proc_pages_alloc
- },
- {
- .ctl_name = OBD_MAXMEMUSED,
- .procname = "memused_max",
- .data = NULL,
- .maxlen = 0,
- .mode = 0444,
- .proc_handler = &proc_mem_max
- },
- {
- .ctl_name = OBD_MAXPAGESUSED,
- .procname = "pagesused_max",
- .data = NULL,
- .maxlen = 0,
- .mode = 0444,
- .proc_handler = &proc_pages_max
- },
- {
- .ctl_name = OBD_LDLM_TIMEOUT,
- .procname = "ldlm_timeout",
- .data = &ldlm_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_set_timeout
- },
- { 0 }
+static int
+proc_max_dirty_pages_in_mb(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int rc = 0;
+
+ if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+ if (write) {
+ rc = lprocfs_write_frac_helper(buffer, *lenp,
+ (unsigned int *)table->data,
+ 1 << (20 - PAGE_CACHE_SHIFT));
+ /* Don't allow them to let dirty pages exceed 90% of system
+ * memory and set a hard minimum of 4MB. */
+ if (obd_max_dirty_pages > ((totalram_pages / 10) * 9)) {
+ CERROR("Refusing to set max dirty pages to %u, which "
+ "is more than 90%% of available RAM; setting "
+ "to %lu\n", obd_max_dirty_pages,
+ ((totalram_pages / 10) * 9));
+ obd_max_dirty_pages = ((totalram_pages / 10) * 9);
+ } else if (obd_max_dirty_pages < 4 << (20 - PAGE_CACHE_SHIFT)) {
+ obd_max_dirty_pages = 4 << (20 - PAGE_CACHE_SHIFT);
+ }
+ } else {
+ char buf[21];
+ int len;
+
+ len = lprocfs_read_frac_helper(buf, sizeof(buf),
+ *(unsigned int *)table->data,
+ 1 << (20 - PAGE_CACHE_SHIFT));
+ if (len > *lenp)
+ len = *lenp;
+ buf[len] = '\0';
+ if (copy_to_user(buffer, buf, len))
+ return -EFAULT;
+ *lenp = len;
+ }
+ *ppos += *lenp;
+ return rc;
+}
+
+#ifdef RANDOM_FAIL_ALLOC
+int proc_alloc_fail_rate(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int rc = 0;
+
+ if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+ if (write) {
+ rc = lprocfs_write_frac_helper(buffer, *lenp,
+ (unsigned int*)table->data,
+ OBD_ALLOC_FAIL_MULT);
+ } else {
+ char buf[21];
+ int len;
+
+ len = lprocfs_read_frac_helper(buf, 21,
+ *(unsigned int*)table->data,
+ OBD_ALLOC_FAIL_MULT);
+ if (len > *lenp)
+ len = *lenp;
+ buf[len] = '\0';
+ if (copy_to_user(buffer, buf, len))
+ return -EFAULT;
+ *lenp = len;
+ }
+ *ppos += *lenp;
+ return rc;
+}
+#endif
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table obd_table[] = {
+ {
+ INIT_CTL_NAME
+ .procname = "timeout",
+ .data = &obd_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_set_timeout
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "debug_peer_on_timeout",
+ .data = &obd_debug_peer_on_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "dump_on_timeout",
+ .data = &obd_dump_on_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "dump_on_eviction",
+ .data = &obd_dump_on_eviction,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "memused",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0444,
+ .proc_handler = &proc_memory_alloc
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "pagesused",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0444,
+ .proc_handler = &proc_pages_alloc
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "memused_max",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0444,
+ .proc_handler = &proc_mem_max
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "pagesused_max",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0444,
+ .proc_handler = &proc_pages_max
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "ldlm_timeout",
+ .data = &ldlm_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_set_timeout
+ },
+#ifdef RANDOM_FAIL_ALLOC
+ {
+ INIT_CTL_NAME
+ .procname = "alloc_fail_rate",
+ .data = &obd_alloc_fail_rate,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_alloc_fail_rate
+ },
+#endif
+ {
+ INIT_CTL_NAME
+ .procname = "max_dirty_mb",
+ .data = &obd_max_dirty_pages,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_max_dirty_pages_in_mb
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "bulk_timeout",
+ .data = &bulk_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "at_min",
+ .data = &at_min,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "at_max",
+ .data = &at_max,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "at_extra",
+ .data = &at_extra,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "at_early_margin",
+ .data = &at_early_margin,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "at_history",
+ .data = &at_history,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ { 0 }