* Top level header file for LProc SNMP
* Author: Hariharan Thantry thantry@users.sourceforge.net
*/
-#ifndef _LPROCFS_SNMP_H
-#define _LPROCFS_SNMP_H
+#ifndef _LINUX_LPROCFS_SNMP_H
+#define _LINUX_LPROCFS_SNMP_H
+#ifndef _LPROCFS_SNMP_H
+#error Do not #include this file directly. #include <lprocfs_status.h> instead
+#endif
#ifdef __KERNEL__
+#ifdef HAVE_KERNEL_CONFIG_H
#include <linux/config.h>
+#endif
#include <linux/autoconf.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/version.h>
#include <linux/smp.h>
+#include <linux/rwsem.h>
#include <libcfs/kp30.h>
# if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
# define kstatfs statfs
#endif
-
-#undef LPROCFS
-#if (defined(__KERNEL__) && defined(CONFIG_PROC_FS))
-# define LPROCFS
-#endif
-
-struct lprocfs_vars {
- const char *name;
- read_proc_t *read_fptr;
- write_proc_t *write_fptr;
- void *data;
-};
-
-struct lprocfs_static_vars {
- struct lprocfs_vars *module_vars;
- struct lprocfs_vars *obd_vars;
-};
-
-/* An lprocfs counter can be configured using the enum bit masks below.
- *
- * LPROCFS_CNTR_EXTERNALLOCK indicates that an external lock already
- * protects this counter from concurrent updates. If not specified,
- * lprocfs an internal per-counter lock variable. External locks are
- * not used to protect counter increments, but are used to protect
- * counter readout and resets.
- *
- * LPROCFS_CNTR_AVGMINMAX indicates a multi-valued counter samples,
- * (i.e. counter can be incremented by more than "1"). When specified,
- * the counter maintains min, max and sum in addition to a simple
- * invocation count. This allows averages to be be computed.
- * If not specified, the counter is an increment-by-1 counter.
- * min, max, sum, etc. are not maintained.
- *
- * LPROCFS_CNTR_STDDEV indicates that the counter should track sum of
- * squares (for multi-valued counter samples only). This allows
- * external computation of standard deviation, but involves a 64-bit
- * multiply per counter increment.
- */
-
-enum {
- LPROCFS_CNTR_EXTERNALLOCK = 0x0001,
- LPROCFS_CNTR_AVGMINMAX = 0x0002,
- LPROCFS_CNTR_STDDEV = 0x0004,
-
- /* counter data type */
- LPROCFS_TYPE_REGS = 0x0100,
- LPROCFS_TYPE_BYTES = 0x0200,
- LPROCFS_TYPE_PAGES = 0x0400,
- LPROCFS_TYPE_CYCLE = 0x0800,
-};
-
-struct lprocfs_atomic {
- atomic_t la_entry;
- atomic_t la_exit;
-};
-
-struct lprocfs_counter {
- struct lprocfs_atomic lc_cntl; /* may need to move to per set */
- unsigned int lc_config;
- __u64 lc_count;
- __u64 lc_sum;
- __u64 lc_min;
- __u64 lc_max;
- __u64 lc_sumsquare;
- const char *lc_name; /* must be static */
- const char *lc_units; /* must be static */
-};
-
-struct lprocfs_percpu {
- struct lprocfs_counter lp_cntr[0];
-};
-
-
-struct lprocfs_stats {
- unsigned int ls_num; /* # of counters */
- unsigned int ls_percpu_size;
- struct lprocfs_percpu *ls_percpu[0];
-};
-
-
-/* class_obd.c */
-extern struct proc_dir_entry *proc_lustre_root;
-
-struct obd_device;
-struct file;
-
-#ifdef LPROCFS
-
-/* Two optimized LPROCFS counter increment functions are provided:
- * lprocfs_counter_incr(cntr, value) - optimized for by-one counters
- * lprocfs_counter_add(cntr) - use for multi-valued counters
- * Counter data layout allows config flag, counter lock and the
- * count itself to reside within a single cache line.
- */
-
-static inline void lprocfs_counter_add(struct lprocfs_stats *stats, int idx,
- long amount)
-{
- struct lprocfs_counter *percpu_cntr;
-
- LASSERT(stats != NULL);
- percpu_cntr = &(stats->ls_percpu[smp_processor_id()]->lp_cntr[idx]);
- atomic_inc(&percpu_cntr->lc_cntl.la_entry);
- percpu_cntr->lc_count++;
-
- if (percpu_cntr->lc_config & LPROCFS_CNTR_AVGMINMAX) {
- percpu_cntr->lc_sum += amount;
- if (percpu_cntr->lc_config & LPROCFS_CNTR_STDDEV)
- percpu_cntr->lc_sumsquare += (__u64)amount * amount;
- if (amount < percpu_cntr->lc_min)
- percpu_cntr->lc_min = amount;
- if (amount > percpu_cntr->lc_max)
- percpu_cntr->lc_max = amount;
- }
- atomic_inc(&percpu_cntr->lc_cntl.la_exit);
-}
-
-static inline void lprocfs_counter_incr(struct lprocfs_stats *stats, int idx)
-{
- struct lprocfs_counter *percpu_cntr;
-
- LASSERT(stats != NULL);
- percpu_cntr = &(stats->ls_percpu[smp_processor_id()]->lp_cntr[idx]);
- atomic_inc(&percpu_cntr->lc_cntl.la_entry);
- percpu_cntr->lc_count++;
- atomic_inc(&percpu_cntr->lc_cntl.la_exit);
-}
-
-extern struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num);
-extern void lprocfs_free_stats(struct lprocfs_stats *stats);
-extern void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
- unsigned conf, const char *name,
- const char *units);
-extern int lprocfs_alloc_obd_stats(struct obd_device *obddev,
- unsigned int num_private_stats);
-extern void lprocfs_free_obd_stats(struct obd_device *obddev);
-extern int lprocfs_alloc_md_stats(struct obd_device *obddev,
- unsigned int num_private_stats);
-extern void lprocfs_free_md_stats(struct obd_device *obddev);
-extern int lprocfs_register_stats(struct proc_dir_entry *root,
- const char *name,
- struct lprocfs_stats *stats);
-
-#define LPROCFS_INIT_MULTI_VARS(array, size) \
-void lprocfs_init_multi_vars(unsigned int idx, \
- struct lprocfs_static_vars *x) \
-{ \
- struct lprocfs_static_vars *glob = (struct lprocfs_static_vars*)array; \
- LASSERT(glob != 0); \
- LASSERT(idx < (unsigned int)(size)); \
- x->module_vars = glob[idx].module_vars; \
- x->obd_vars = glob[idx].obd_vars; \
-} \
-
-#define LPROCFS_INIT_VARS(name, vclass, vinstance) \
-void lprocfs_##name##_init_vars(struct lprocfs_static_vars *x) \
-{ \
- x->module_vars = vclass; \
- x->obd_vars = vinstance; \
-} \
-
-#define lprocfs_init_vars(NAME, VAR) \
-do { \
- extern void lprocfs_##NAME##_init_vars(struct lprocfs_static_vars *); \
- lprocfs_##NAME##_init_vars(VAR); \
-} while (0)
-
-extern void lprocfs_init_multi_vars(unsigned int idx,
- struct lprocfs_static_vars *var);
-/* lprocfs_status.c */
-extern int lprocfs_add_vars(struct proc_dir_entry *root,
- struct lprocfs_vars *var,
- void *data);
-
-extern struct proc_dir_entry *lprocfs_register(const char *name,
- struct proc_dir_entry *parent,
- struct lprocfs_vars *list,
- void *data);
-
-extern void lprocfs_remove(struct proc_dir_entry *root);
-
-extern struct proc_dir_entry *lprocfs_srch(struct proc_dir_entry *root,
- const char *name);
-
-extern int lprocfs_obd_attach(struct obd_device *obd, struct lprocfs_vars *list);
-extern int lprocfs_obd_detach(struct obd_device *obd);
-
-/* Generic callbacks */
-
-extern int lprocfs_rd_u64(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_uuid(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_name(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_fstype(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_server_uuid(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_conn_uuid(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_num_exports(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_numrefs(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-
-/* Statfs helpers */
-extern int lprocfs_rd_blksize(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_kbytestotal(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_kbytesfree(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_kbytesavail(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_filestotal(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_filesfree(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_rd_filegroups(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-
-extern int lprocfs_write_helper(const char *buffer, unsigned long count,
- int *val);
-extern int lprocfs_write_u64_helper(const char *buffer, unsigned long count,
- __u64 *val);
-int lprocfs_obd_seq_create(struct obd_device *dev, char *name, mode_t mode,
- struct file_operations *seq_fops, void *data);
-struct obd_histogram;
-void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value);
-void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value);
-void lprocfs_oh_clear(struct obd_histogram *oh);
-unsigned long lprocfs_oh_sum(struct obd_histogram *oh);
-
-struct obd_service_time;
-void lprocfs_stime_record(struct obd_service_time *stime,
- struct timeval *large, struct timeval *small);
-unsigned long lprocfs_stime_avg_ms(struct obd_service_time *stime);
-unsigned long lprocfs_stime_avg_us(struct obd_service_time *stime);
-
-/* lprocfs_status.c: counter read/write functions */
-extern int lprocfs_counter_read(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-extern int lprocfs_counter_write(struct file *file, const char *buffer,
- unsigned long count, void *data);
-
-/* lprocfs_status.c: recovery status */
-int lprocfs_obd_rd_recovery_status(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-
-#else
-/* LPROCFS is not defined */
-static inline void lprocfs_counter_add(struct lprocfs_stats *stats,
- int index, long amount) { return; }
-static inline void lprocfs_counter_incr(struct lprocfs_stats *stats,
- int index) { return; }
-static inline void lprocfs_counter_init(struct lprocfs_stats *stats,
- int index, unsigned conf,
- const char *name, const char *units)
-{ return; }
-struct obd_service_time;
-static inline void lprocfs_stime_record(struct obd_service_time *stime,
- struct timeval *large, struct timeval *small)
-{ return; }
-
-
-static inline struct lprocfs_stats* lprocfs_alloc_stats(unsigned int num)
-{ return NULL; }
-static inline void lprocfs_free_stats(struct lprocfs_stats *stats)
-{ return; }
-
-static inline int lprocfs_register_stats(struct proc_dir_entry *root,
- const char *name,
- struct lprocfs_stats *stats)
-{ return 0; }
-static inline int lprocfs_alloc_obd_stats(struct obd_device *obddev,
- unsigned int num_private_stats)
-{ return 0; }
-static inline void lprocfs_free_obd_stats(struct obd_device *obddev)
-{ return; }
-
-static inline struct proc_dir_entry *
-lprocfs_register(const char *name, struct proc_dir_entry *parent,
- struct lprocfs_vars *list, void *data) { return NULL; }
-#define LPROCFS_INIT_MULTI_VARS(array, size) do {} while (0)
-static inline void lprocfs_init_multi_vars(unsigned int idx,
- struct lprocfs_static_vars *x) { return; }
-#define LPROCFS_INIT_VARS(name, vclass, vinstance) do {} while (0)
-#define lprocfs_init_vars(...) do {} while (0)
-static inline int lprocfs_add_vars(struct proc_dir_entry *root,
- struct lprocfs_vars *var,
- void *data) { return 0; }
-static inline void lprocfs_remove(struct proc_dir_entry *root) {};
-static inline struct proc_dir_entry *lprocfs_srch(struct proc_dir_entry *head,
- const char *name) {return 0;}
-static inline int lprocfs_obd_attach(struct obd_device *dev,
- struct lprocfs_vars *list) { return 0; }
-static inline int lprocfs_obd_detach(struct obd_device *dev) { return 0; }
-static inline int lprocfs_rd_u64(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline int lprocfs_rd_uuid(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline int lprocfs_rd_name(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline int lprocfs_rd_server_uuid(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{ return 0; }
-static inline int lprocfs_rd_conn_uuid(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{ return 0; }
-static inline int lprocfs_rd_num_exports(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{ return 0; }
-static inline int lprocfs_rd_numrefs(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-
-/* Statfs helpers */
-static inline
-int lprocfs_rd_blksize(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline
-int lprocfs_rd_kbytestotal(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline
-int lprocfs_rd_kbytesfree(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline
-int lprocfs_rd_kbytesavail(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline
-int lprocfs_rd_filestotal(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline
-int lprocfs_rd_filesfree(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline
-int lprocfs_rd_filegroups(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline
-int lprocfs_counter_read(char *page, char **start, off_t off,
- int count, int *eof, void *data) { return 0; }
-static inline
-int lprocfs_counter_write(struct file *file, const char *buffer,
- unsigned long count, void *data) { return 0; }
-#endif /* LPROCFS */
-
#endif /* LPROCFS_SNMP_H */
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