#include <linux/sysctl.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
-
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/debugfs.h>
#include <asm/debug.h>
#define DEBUG_PROLOG_ENTRY -1
+#define ALL_AREAS 0 /* copy all debug areas */
+#define NO_AREAS 1 /* copy no debug areas */
+
/* typedefs */
typedef struct file_private_info {
loff_t offset; /* offset of last read in file */
int act_area; /* number of last formated area */
+ int act_page; /* act page in given area */
int act_entry; /* last formated entry (offset */
/* relative to beginning of last */
- /* formated area) */
+ /* formated page) */
size_t act_entry_offset; /* up to this offset we copied */
/* in last read the last formated */
/* entry to userland */
* This assumes that all args are converted into longs
* on L/390 this is the case for all types of parameter
* except of floats, and long long (32 bit)
- *
- */
+ *
+ */
long args[0];
} debug_sprintf_entry_t;
-extern void tod_to_timeval(uint64_t todval, struct timeval *xtime);
+extern void tod_to_timeval(uint64_t todval, struct timespec *xtime);
/* internal function prototyes */
static int debug_init(void);
static ssize_t debug_output(struct file *file, char __user *user_buf,
- size_t user_len, loff_t * offset);
+ size_t user_len, loff_t * offset);
static ssize_t debug_input(struct file *file, const char __user *user_buf,
- size_t user_len, loff_t * offset);
+ size_t user_len, loff_t * offset);
static int debug_open(struct inode *inode, struct file *file);
static int debug_close(struct inode *inode, struct file *file);
-static debug_info_t* debug_info_create(char *name, int page_order, int nr_areas, int buf_size);
+static debug_info_t* debug_info_create(char *name, int pages_per_area,
+ int nr_areas, int buf_size);
static void debug_info_get(debug_info_t *);
static void debug_info_put(debug_info_t *);
static int debug_prolog_level_fn(debug_info_t * id,
- struct debug_view *view, char *out_buf);
+ struct debug_view *view, char *out_buf);
static int debug_input_level_fn(debug_info_t * id, struct debug_view *view,
- struct file *file, const char __user *user_buf,
- size_t user_buf_size, loff_t * offset);
+ struct file *file, const char __user *user_buf,
+ size_t user_buf_size, loff_t * offset);
+static int debug_prolog_pages_fn(debug_info_t * id,
+ struct debug_view *view, char *out_buf);
+static int debug_input_pages_fn(debug_info_t * id, struct debug_view *view,
+ struct file *file, const char __user *user_buf,
+ size_t user_buf_size, loff_t * offset);
static int debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
- struct file *file, const char __user *user_buf,
- size_t user_buf_size, loff_t * offset);
+ struct file *file, const char __user *user_buf,
+ size_t user_buf_size, loff_t * offset);
static int debug_hex_ascii_format_fn(debug_info_t * id, struct debug_view *view,
- char *out_buf, const char *in_buf);
+ char *out_buf, const char *in_buf);
static int debug_raw_format_fn(debug_info_t * id,
- struct debug_view *view, char *out_buf,
- const char *in_buf);
+ struct debug_view *view, char *out_buf,
+ const char *in_buf);
static int debug_raw_header_fn(debug_info_t * id, struct debug_view *view,
- int area, debug_entry_t * entry, char *out_buf);
+ int area, debug_entry_t * entry, char *out_buf);
static int debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
- char *out_buf, debug_sprintf_entry_t *curr_event);
+ char *out_buf, debug_sprintf_entry_t *curr_event);
/* globals */
NULL
};
+struct debug_view debug_pages_view = {
+ "pages",
+ &debug_prolog_pages_fn,
+ NULL,
+ NULL,
+ &debug_input_pages_fn,
+ NULL
+};
+
struct debug_view debug_flush_view = {
"flush",
NULL,
static int initialized;
static struct file_operations debug_file_ops = {
- .owner = THIS_MODULE,
+ .owner = THIS_MODULE,
.read = debug_output,
- .write = debug_input,
+ .write = debug_input,
.open = debug_open,
.release = debug_close,
};
-static struct proc_dir_entry *debug_proc_root_entry;
+static struct dentry *debug_debugfs_root_entry;
/* functions */
+/*
+ * debug_areas_alloc
+ * - Debug areas are implemented as a threedimensonal array:
+ * areas[areanumber][pagenumber][pageoffset]
+ */
+
+static debug_entry_t***
+debug_areas_alloc(int pages_per_area, int nr_areas)
+{
+ debug_entry_t*** areas;
+ int i,j;
+
+ areas = (debug_entry_t ***) kmalloc(nr_areas *
+ sizeof(debug_entry_t**),
+ GFP_KERNEL);
+ if (!areas)
+ goto fail_malloc_areas;
+ for (i = 0; i < nr_areas; i++) {
+ areas[i] = (debug_entry_t**) kmalloc(pages_per_area *
+ sizeof(debug_entry_t*),GFP_KERNEL);
+ if (!areas[i]) {
+ goto fail_malloc_areas2;
+ }
+ for(j = 0; j < pages_per_area; j++) {
+ areas[i][j] = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if(!areas[i][j]) {
+ for(j--; j >=0 ; j--) {
+ kfree(areas[i][j]);
+ }
+ kfree(areas[i]);
+ goto fail_malloc_areas2;
+ }
+ }
+ }
+ return areas;
+
+fail_malloc_areas2:
+ for(i--; i >= 0; i--){
+ for(j=0; j < pages_per_area;j++){
+ kfree(areas[i][j]);
+ }
+ kfree(areas[i]);
+ }
+ kfree(areas);
+fail_malloc_areas:
+ return NULL;
+
+}
+
+
/*
* debug_info_alloc
* - alloc new debug-info
*/
-static debug_info_t* debug_info_alloc(char *name, int page_order,
- int nr_areas, int buf_size)
+static debug_info_t*
+debug_info_alloc(char *name, int pages_per_area, int nr_areas, int buf_size,
+ int level, int mode)
{
debug_info_t* rc;
- int i;
/* alloc everything */
- rc = (debug_info_t*) kmalloc(sizeof(debug_info_t), GFP_ATOMIC);
+ rc = (debug_info_t*) kmalloc(sizeof(debug_info_t), GFP_KERNEL);
if(!rc)
goto fail_malloc_rc;
- rc->active_entry = (int*)kmalloc(nr_areas * sizeof(int), GFP_ATOMIC);
- if(!rc->active_entry)
- goto fail_malloc_active_entry;
- memset(rc->active_entry, 0, nr_areas * sizeof(int));
- rc->areas = (debug_entry_t **) kmalloc(nr_areas *
- sizeof(debug_entry_t *),
- GFP_ATOMIC);
- if (!rc->areas)
- goto fail_malloc_areas;
- for (i = 0; i < nr_areas; i++) {
- rc->areas[i] = (debug_entry_t *) __get_free_pages(GFP_ATOMIC,
- page_order);
- if (!rc->areas[i]) {
- for (i--; i >= 0; i--) {
- free_pages((unsigned long) rc->areas[i],
- page_order);
- }
- goto fail_malloc_areas2;
- } else {
- memset(rc->areas[i], 0, PAGE_SIZE << page_order);
- }
+ rc->active_entries = kcalloc(nr_areas, sizeof(int), GFP_KERNEL);
+ if(!rc->active_entries)
+ goto fail_malloc_active_entries;
+ rc->active_pages = kcalloc(nr_areas, sizeof(int), GFP_KERNEL);
+ if(!rc->active_pages)
+ goto fail_malloc_active_pages;
+ if((mode == ALL_AREAS) && (pages_per_area != 0)){
+ rc->areas = debug_areas_alloc(pages_per_area, nr_areas);
+ if(!rc->areas)
+ goto fail_malloc_areas;
+ } else {
+ rc->areas = NULL;
}
/* initialize members */
spin_lock_init(&rc->lock);
- rc->page_order = page_order;
- rc->nr_areas = nr_areas;
- rc->active_area = 0;
- rc->level = DEBUG_DEFAULT_LEVEL;
- rc->buf_size = buf_size;
- rc->entry_size = sizeof(debug_entry_t) + buf_size;
- strlcpy(rc->name, name, sizeof(rc->name));
+ rc->pages_per_area = pages_per_area;
+ rc->nr_areas = nr_areas;
+ rc->active_area = 0;
+ rc->level = level;
+ rc->buf_size = buf_size;
+ rc->entry_size = sizeof(debug_entry_t) + buf_size;
+ strlcpy(rc->name, name, sizeof(rc->name)-1);
memset(rc->views, 0, DEBUG_MAX_VIEWS * sizeof(struct debug_view *));
-#ifdef CONFIG_PROC_FS
- memset(rc->proc_entries, 0 ,DEBUG_MAX_VIEWS *
- sizeof(struct proc_dir_entry*));
-#endif /* CONFIG_PROC_FS */
+ memset(rc->debugfs_entries, 0 ,DEBUG_MAX_VIEWS *
+ sizeof(struct dentry*));
atomic_set(&(rc->ref_count), 0);
return rc;
-fail_malloc_areas2:
- kfree(rc->areas);
fail_malloc_areas:
- kfree(rc->active_entry);
-fail_malloc_active_entry:
+ kfree(rc->active_pages);
+fail_malloc_active_pages:
+ kfree(rc->active_entries);
+fail_malloc_active_entries:
kfree(rc);
fail_malloc_rc:
return NULL;
}
/*
- * debug_info_free
- * - free memory debug-info
+ * debug_areas_free
+ * - free all debug areas
*/
-static void debug_info_free(debug_info_t* db_info){
- int i;
+static void
+debug_areas_free(debug_info_t* db_info)
+{
+ int i,j;
+
+ if(!db_info->areas)
+ return;
for (i = 0; i < db_info->nr_areas; i++) {
- free_pages((unsigned long) db_info->areas[i],
- db_info->page_order);
+ for(j = 0; j < db_info->pages_per_area; j++) {
+ kfree(db_info->areas[i][j]);
+ }
+ kfree(db_info->areas[i]);
}
kfree(db_info->areas);
- kfree(db_info->active_entry);
+ db_info->areas = NULL;
+}
+
+/*
+ * debug_info_free
+ * - free memory debug-info
+ */
+
+static void
+debug_info_free(debug_info_t* db_info){
+ debug_areas_free(db_info);
+ kfree(db_info->active_entries);
+ kfree(db_info->active_pages);
kfree(db_info);
}
* - create new debug-info
*/
-static debug_info_t* debug_info_create(char *name, int page_order,
- int nr_areas, int buf_size)
+static debug_info_t*
+debug_info_create(char *name, int pages_per_area, int nr_areas, int buf_size)
{
debug_info_t* rc;
- rc = debug_info_alloc(name, page_order, nr_areas, buf_size);
+ rc = debug_info_alloc(name, pages_per_area, nr_areas, buf_size,
+ DEBUG_DEFAULT_LEVEL, ALL_AREAS);
if(!rc)
goto out;
-
- /* create proc rood directory */
- rc->proc_root_entry = proc_mkdir(rc->name, debug_proc_root_entry);
+ /* create root directory */
+ rc->debugfs_root_entry = debugfs_create_dir(rc->name,
+ debug_debugfs_root_entry);
/* append new element to linked list */
- if (debug_area_first == NULL) {
+ if (!debug_area_first) {
/* first element in list */
debug_area_first = rc;
rc->prev = NULL;
* - copy debug-info
*/
-static debug_info_t* debug_info_copy(debug_info_t* in)
+static debug_info_t*
+debug_info_copy(debug_info_t* in, int mode)
{
- int i;
+ int i,j;
debug_info_t* rc;
- rc = debug_info_alloc(in->name, in->page_order,
- in->nr_areas, in->buf_size);
- if(!rc)
+ unsigned long flags;
+
+ /* get a consistent copy of the debug areas */
+ do {
+ rc = debug_info_alloc(in->name, in->pages_per_area,
+ in->nr_areas, in->buf_size, in->level, mode);
+ spin_lock_irqsave(&in->lock, flags);
+ if(!rc)
+ goto out;
+ /* has something changed in the meantime ? */
+ if((rc->pages_per_area == in->pages_per_area) &&
+ (rc->nr_areas == in->nr_areas)) {
+ break;
+ }
+ spin_unlock_irqrestore(&in->lock, flags);
+ debug_info_free(rc);
+ } while (1);
+
+ if(!rc || (mode == NO_AREAS))
goto out;
for(i = 0; i < in->nr_areas; i++){
- memcpy(rc->areas[i],in->areas[i], PAGE_SIZE << in->page_order);
+ for(j = 0; j < in->pages_per_area; j++) {
+ memcpy(rc->areas[i][j], in->areas[i][j],PAGE_SIZE);
+ }
}
out:
+ spin_unlock_irqrestore(&in->lock, flags);
return rc;
}
* - increments reference count for debug-info
*/
-static void debug_info_get(debug_info_t * db_info)
+static void
+debug_info_get(debug_info_t * db_info)
{
if (db_info)
atomic_inc(&db_info->ref_count);
* - decreases reference count for debug-info and frees it if necessary
*/
-static void debug_info_put(debug_info_t *db_info)
+static void
+debug_info_put(debug_info_t *db_info)
{
int i;
if (!db_info)
return;
if (atomic_dec_and_test(&db_info->ref_count)) {
-#ifdef DEBUG
- printk(KERN_INFO "debug: freeing debug area %p (%s)\n",
- db_info, db_info->name);
-#endif
for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
- if (db_info->views[i] == NULL)
+ if (!db_info->views[i])
continue;
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(db_info->proc_entries[i]->name,
- db_info->proc_root_entry);
-#endif
+ debugfs_remove(db_info->debugfs_entries[i]);
}
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(db_info->proc_root_entry->name,
- debug_proc_root_entry);
-#endif
+ debugfs_remove(db_info->debugfs_root_entry);
if(db_info == debug_area_first)
debug_area_first = db_info->next;
if(db_info == debug_area_last)
* - format one debug entry and return size of formated data
*/
-static int debug_format_entry(file_private_info_t *p_info)
+static int
+debug_format_entry(file_private_info_t *p_info)
{
- debug_info_t *id_org = p_info->debug_info_org;
debug_info_t *id_snap = p_info->debug_info_snap;
struct debug_view *view = p_info->view;
debug_entry_t *act_entry;
if(p_info->act_entry == DEBUG_PROLOG_ENTRY){
/* print prolog */
if (view->prolog_proc)
- len += view->prolog_proc(id_org, view,p_info->temp_buf);
+ len += view->prolog_proc(id_snap,view,p_info->temp_buf);
goto out;
}
-
- act_entry = (debug_entry_t *) ((char*)id_snap->areas[p_info->act_area] +
- p_info->act_entry);
+ if (!id_snap->areas) /* this is true, if we have a prolog only view */
+ goto out; /* or if 'pages_per_area' is 0 */
+ act_entry = (debug_entry_t *) ((char*)id_snap->areas[p_info->act_area]
+ [p_info->act_page] + p_info->act_entry);
if (act_entry->id.stck == 0LL)
goto out; /* empty entry */
if (view->header_proc)
- len += view->header_proc(id_org, view, p_info->act_area,
+ len += view->header_proc(id_snap, view, p_info->act_area,
act_entry, p_info->temp_buf + len);
if (view->format_proc)
- len += view->format_proc(id_org, view, p_info->temp_buf + len,
+ len += view->format_proc(id_snap, view, p_info->temp_buf + len,
DEBUG_DATA(act_entry));
- out:
+out:
return len;
}
* - goto next entry in p_info
*/
-extern inline int debug_next_entry(file_private_info_t *p_info)
+static inline int
+debug_next_entry(file_private_info_t *p_info)
{
- debug_info_t *id = p_info->debug_info_snap;
+ debug_info_t *id;
+
+ id = p_info->debug_info_snap;
if(p_info->act_entry == DEBUG_PROLOG_ENTRY){
p_info->act_entry = 0;
+ p_info->act_page = 0;
goto out;
}
- if ((p_info->act_entry += id->entry_size)
- > ((PAGE_SIZE << (id->page_order))
- - id->entry_size)){
-
- /* next area */
+ if(!id->areas)
+ return 1;
+ p_info->act_entry += id->entry_size;
+ /* switch to next page, if we reached the end of the page */
+ if (p_info->act_entry > (PAGE_SIZE - id->entry_size)){
+ /* next page */
p_info->act_entry = 0;
- p_info->act_area++;
+ p_info->act_page += 1;
+ if((p_info->act_page % id->pages_per_area) == 0) {
+ /* next area */
+ p_info->act_area++;
+ p_info->act_page=0;
+ }
if(p_info->act_area >= id->nr_areas)
return 1;
}
* - copies formated debug entries to the user buffer
*/
-static ssize_t debug_output(struct file *file, /* file descriptor */
- char __user *user_buf, /* user buffer */
- size_t len, /* length of buffer */
- loff_t *offset) /* offset in the file */
+static ssize_t
+debug_output(struct file *file, /* file descriptor */
+ char __user *user_buf, /* user buffer */
+ size_t len, /* length of buffer */
+ loff_t *offset) /* offset in the file */
{
size_t count = 0;
- size_t entry_offset, size = 0;
+ size_t entry_offset;
file_private_info_t *p_info;
p_info = ((file_private_info_t *) file->private_data);
return -EPIPE;
if(p_info->act_area >= p_info->debug_info_snap->nr_areas)
return 0;
-
entry_offset = p_info->act_entry_offset;
-
while(count < len){
- size = debug_format_entry(p_info);
- size = min((len - count), (size - entry_offset));
-
- if(size){
- if (copy_to_user(user_buf + count,
- p_info->temp_buf + entry_offset, size))
- return -EFAULT;
+ int formatted_line_size;
+ int formatted_line_residue;
+ int user_buf_residue;
+ size_t copy_size;
+
+ formatted_line_size = debug_format_entry(p_info);
+ formatted_line_residue = formatted_line_size - entry_offset;
+ user_buf_residue = len-count;
+ copy_size = min(user_buf_residue, formatted_line_residue);
+ if(copy_size){
+ if (copy_to_user(user_buf + count, p_info->temp_buf
+ + entry_offset, copy_size))
+ return -EFAULT;
+ count += copy_size;
+ entry_offset += copy_size;
}
- count += size;
- entry_offset = 0;
- if(count != len)
- if(debug_next_entry(p_info))
+ if(copy_size == formatted_line_residue){
+ entry_offset = 0;
+ if(debug_next_entry(p_info))
goto out;
+ }
}
out:
p_info->offset = *offset + count;
- p_info->act_entry_offset = size;
+ p_info->act_entry_offset = entry_offset;
*offset = p_info->offset;
return count;
}
* - calls input function of view
*/
-static ssize_t debug_input(struct file *file,
- const char __user *user_buf, size_t length,
- loff_t *offset)
+static ssize_t
+debug_input(struct file *file, const char __user *user_buf, size_t length,
+ loff_t *offset)
{
int rc = 0;
file_private_info_t *p_info;
* handle
*/
-static int debug_open(struct inode *inode, struct file *file)
+static int
+debug_open(struct inode *inode, struct file *file)
{
int i = 0, rc = 0;
file_private_info_t *p_info;
debug_info_t *debug_info, *debug_info_snapshot;
-#ifdef DEBUG
- printk("debug_open\n");
-#endif
down(&debug_lock);
-
- /* find debug log and view */
-
- debug_info = debug_area_first;
- while(debug_info != NULL){
- for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
- if (debug_info->views[i] == NULL)
- continue;
- else if (debug_info->proc_entries[i] ==
- PDE(file->f_dentry->d_inode)) {
- goto found; /* found view ! */
- }
+ debug_info = (struct debug_info*)file->f_dentry->d_inode->u.generic_ip;
+ /* find debug view */
+ for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
+ if (!debug_info->views[i])
+ continue;
+ else if (debug_info->debugfs_entries[i] ==
+ file->f_dentry) {
+ goto found; /* found view ! */
}
- debug_info = debug_info->next;
}
/* no entry found */
rc = -EINVAL;
goto out;
- found:
+found:
- /* make snapshot of current debug areas to get it consistent */
+ /* Make snapshot of current debug areas to get it consistent. */
+ /* To copy all the areas is only needed, if we have a view which */
+ /* formats the debug areas. */
- debug_info_snapshot = debug_info_copy(debug_info);
+ if(!debug_info->views[i]->format_proc &&
+ !debug_info->views[i]->header_proc){
+ debug_info_snapshot = debug_info_copy(debug_info, NO_AREAS);
+ } else {
+ debug_info_snapshot = debug_info_copy(debug_info, ALL_AREAS);
+ }
if(!debug_info_snapshot){
-#ifdef DEBUG
- printk(KERN_ERR "debug_open: debug_info_copy failed (out of mem)\n");
-#endif
rc = -ENOMEM;
goto out;
}
-
- if ((file->private_data =
- kmalloc(sizeof(file_private_info_t), GFP_ATOMIC)) == 0) {
-#ifdef DEBUG
- printk(KERN_ERR "debug_open: kmalloc failed\n");
-#endif
- debug_info_free(debug_info_snapshot);
+ p_info = (file_private_info_t *) kmalloc(sizeof(file_private_info_t),
+ GFP_KERNEL);
+ if(!p_info){
+ if(debug_info_snapshot)
+ debug_info_free(debug_info_snapshot);
rc = -ENOMEM;
goto out;
}
- p_info = (file_private_info_t *) file->private_data;
p_info->offset = 0;
p_info->debug_info_snap = debug_info_snapshot;
p_info->debug_info_org = debug_info;
p_info->view = debug_info->views[i];
p_info->act_area = 0;
+ p_info->act_page = 0;
p_info->act_entry = DEBUG_PROLOG_ENTRY;
p_info->act_entry_offset = 0;
-
+ file->private_data = p_info;
debug_info_get(debug_info);
-
- out:
+out:
up(&debug_lock);
return rc;
}
* - deletes private_data area of the file handle
*/
-static int debug_close(struct inode *inode, struct file *file)
+static int
+debug_close(struct inode *inode, struct file *file)
{
file_private_info_t *p_info;
-#ifdef DEBUG
- printk("debug_close\n");
-#endif
p_info = (file_private_info_t *) file->private_data;
- debug_info_free(p_info->debug_info_snap);
+ if(p_info->debug_info_snap)
+ debug_info_free(p_info->debug_info_snap);
debug_info_put(p_info->debug_info_org);
kfree(file->private_data);
return 0; /* success */
* - returns handle for debug area
*/
-debug_info_t *debug_register
- (char *name, int page_order, int nr_areas, int buf_size)
+debug_info_t*
+debug_register (char *name, int pages_per_area, int nr_areas, int buf_size)
{
debug_info_t *rc = NULL;
/* create new debug_info */
- rc = debug_info_create(name, page_order, nr_areas, buf_size);
+ rc = debug_info_create(name, pages_per_area, nr_areas, buf_size);
if(!rc)
goto out;
debug_register_view(rc, &debug_level_view);
debug_register_view(rc, &debug_flush_view);
-#ifdef DEBUG
- printk(KERN_INFO
- "debug: reserved %d areas of %d pages for debugging %s\n",
- nr_areas, 1 << page_order, rc->name);
-#endif
- out:
- if (rc == NULL){
+ debug_register_view(rc, &debug_pages_view);
+out:
+ if (!rc){
printk(KERN_ERR "debug: debug_register failed for %s\n",name);
}
up(&debug_lock);
* - give back debug area
*/
-void debug_unregister(debug_info_t * id)
+void
+debug_unregister(debug_info_t * id)
{
if (!id)
goto out;
down(&debug_lock);
-#ifdef DEBUG
- printk(KERN_INFO "debug: unregistering %s\n", id->name);
-#endif
debug_info_put(id);
up(&debug_lock);
- out:
+out:
return;
}
+/*
+ * debug_set_size:
+ * - set area size (number of pages) and number of areas
+ */
+static int
+debug_set_size(debug_info_t* id, int nr_areas, int pages_per_area)
+{
+ unsigned long flags;
+ debug_entry_t *** new_areas;
+ int rc=0;
+
+ if(!id || (nr_areas <= 0) || (pages_per_area < 0))
+ return -EINVAL;
+ if(pages_per_area > 0){
+ new_areas = debug_areas_alloc(pages_per_area, nr_areas);
+ if(!new_areas) {
+ printk(KERN_WARNING "debug: could not allocate memory "\
+ "for pagenumber: %i\n",pages_per_area);
+ rc = -ENOMEM;
+ goto out;
+ }
+ } else {
+ new_areas = NULL;
+ }
+ spin_lock_irqsave(&id->lock,flags);
+ debug_areas_free(id);
+ id->areas = new_areas;
+ id->nr_areas = nr_areas;
+ id->pages_per_area = pages_per_area;
+ id->active_area = 0;
+ memset(id->active_entries,0,sizeof(int)*id->nr_areas);
+ memset(id->active_pages, 0, sizeof(int)*id->nr_areas);
+ spin_unlock_irqrestore(&id->lock,flags);
+ printk(KERN_INFO "debug: %s: set new size (%i pages)\n"\
+ ,id->name, pages_per_area);
+out:
+ return rc;
+}
+
/*
* debug_set_level:
* - set actual debug level
*/
-void debug_set_level(debug_info_t* id, int new_level)
+void
+debug_set_level(debug_info_t* id, int new_level)
{
unsigned long flags;
if(!id)
id->name, new_level, 0, DEBUG_MAX_LEVEL);
} else {
id->level = new_level;
-#ifdef DEBUG
- printk(KERN_INFO
- "debug: %s: new level %i\n",id->name,id->level);
-#endif
}
spin_unlock_irqrestore(&id->lock,flags);
}
* - set active entry to next in the ring buffer
*/
-extern inline void proceed_active_entry(debug_info_t * id)
+static inline void
+proceed_active_entry(debug_info_t * id)
{
- if ((id->active_entry[id->active_area] += id->entry_size)
- > ((PAGE_SIZE << (id->page_order)) - id->entry_size))
- id->active_entry[id->active_area] = 0;
+ if ((id->active_entries[id->active_area] += id->entry_size)
+ > (PAGE_SIZE - id->entry_size)){
+ id->active_entries[id->active_area] = 0;
+ id->active_pages[id->active_area] =
+ (id->active_pages[id->active_area] + 1) %
+ id->pages_per_area;
+ }
}
/*
* - set active area to next in the ring buffer
*/
-extern inline void proceed_active_area(debug_info_t * id)
+static inline void
+proceed_active_area(debug_info_t * id)
{
id->active_area++;
id->active_area = id->active_area % id->nr_areas;
* get_active_entry:
*/
-extern inline debug_entry_t *get_active_entry(debug_info_t * id)
+static inline debug_entry_t*
+get_active_entry(debug_info_t * id)
{
- return (debug_entry_t *) ((char *) id->areas[id->active_area] +
- id->active_entry[id->active_area]);
+ return (debug_entry_t *) (((char *) id->areas[id->active_area]
+ [id->active_pages[id->active_area]]) +
+ id->active_entries[id->active_area]);
}
/*
* - set timestamp, caller address, cpu number etc.
*/
-extern inline void debug_finish_entry(debug_info_t * id, debug_entry_t* active,
- int level, int exception)
+static inline void
+debug_finish_entry(debug_info_t * id, debug_entry_t* active, int level,
+ int exception)
{
- STCK(active->id.stck);
+ active->id.stck = get_clock();
active->id.fields.cpuid = smp_processor_id();
active->caller = __builtin_return_address(0);
active->id.fields.exception = exception;
* always allow read, allow write only if debug_stoppable is set or
* if debug_active is already off
*/
-static int s390dbf_procactive(ctl_table *table, int write, struct file *filp,
+static int
+s390dbf_procactive(ctl_table *table, int write, struct file *filp,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
if (!write || debug_stoppable || !debug_active)
struct ctl_table_header *s390dbf_sysctl_header;
-void debug_stop_all(void)
+void
+debug_stop_all(void)
{
if (debug_stoppable)
debug_active = 0;
* - write debug entry with given size
*/
-debug_entry_t *debug_event_common(debug_info_t * id, int level, const void *buf,
- int len)
+debug_entry_t*
+debug_event_common(debug_info_t * id, int level, const void *buf, int len)
{
unsigned long flags;
debug_entry_t *active;
- if (!debug_active)
+ if (!debug_active || !id->areas)
return NULL;
spin_lock_irqsave(&id->lock, flags);
active = get_active_entry(id);
* - write debug entry with given size and switch to next debug area
*/
-debug_entry_t *debug_exception_common(debug_info_t * id, int level,
- const void *buf, int len)
+debug_entry_t
+*debug_exception_common(debug_info_t * id, int level, const void *buf, int len)
{
unsigned long flags;
debug_entry_t *active;
- if (!debug_active)
+ if (!debug_active || !id->areas)
return NULL;
spin_lock_irqsave(&id->lock, flags);
active = get_active_entry(id);
* counts arguments in format string for sprintf view
*/
-extern inline int debug_count_numargs(char *string)
+static inline int
+debug_count_numargs(char *string)
{
int numargs=0;
* debug_sprintf_event:
*/
-debug_entry_t *debug_sprintf_event(debug_info_t* id,
- int level,char *string,...)
+debug_entry_t*
+debug_sprintf_event(debug_info_t* id, int level,char *string,...)
{
va_list ap;
int numargs,idx;
if((!id) || (level > id->level))
return NULL;
- if (!debug_active)
+ if (!debug_active || !id->areas)
return NULL;
numargs=debug_count_numargs(string);
* debug_sprintf_exception:
*/
-debug_entry_t *debug_sprintf_exception(debug_info_t* id,
- int level,char *string,...)
+debug_entry_t*
+debug_sprintf_exception(debug_info_t* id, int level,char *string,...)
{
va_list ap;
int numargs,idx;
if((!id) || (level > id->level))
return NULL;
- if (!debug_active)
+ if (!debug_active || !id->areas)
return NULL;
numargs=debug_count_numargs(string);
* - is called exactly once to initialize the debug feature
*/
-static int __init debug_init(void)
+static int
+__init debug_init(void)
{
int rc = 0;
s390dbf_sysctl_header = register_sysctl_table(s390dbf_dir_table, 1);
down(&debug_lock);
-#ifdef CONFIG_PROC_FS
- debug_proc_root_entry = proc_mkdir(DEBUG_DIR_ROOT, NULL);
-#endif /* CONFIG_PROC_FS */
+ debug_debugfs_root_entry = debugfs_create_dir(DEBUG_DIR_ROOT,NULL);
printk(KERN_INFO "debug: Initialization complete\n");
initialized = 1;
up(&debug_lock);
* debug_register_view:
*/
-int debug_register_view(debug_info_t * id, struct debug_view *view)
+int
+debug_register_view(debug_info_t * id, struct debug_view *view)
{
int rc = 0;
int i;
unsigned long flags;
mode_t mode = S_IFREG;
- struct proc_dir_entry *pde;
+ struct dentry *pde;
if (!id)
goto out;
mode |= S_IRUSR;
if (view->input_proc)
mode |= S_IWUSR;
- pde = create_proc_entry(view->name, mode, id->proc_root_entry);
+ pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,
+ id , &debug_file_ops);
if (!pde){
- printk(KERN_WARNING "debug: create_proc_entry() failed! Cannot register view %s/%s\n", id->name,view->name);
+ printk(KERN_WARNING "debug: debugfs_create_file() failed!"\
+ " Cannot register view %s/%s\n", id->name,view->name);
rc = -1;
goto out;
}
-
spin_lock_irqsave(&id->lock, flags);
for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
- if (id->views[i] == NULL)
+ if (!id->views[i])
break;
}
if (i == DEBUG_MAX_VIEWS) {
id->name,view->name);
printk(KERN_WARNING
"debug: maximum number of views reached (%i)!\n", i);
- remove_proc_entry(pde->name, id->proc_root_entry);
+ debugfs_remove(pde);
rc = -1;
- }
- else {
+ } else {
id->views[i] = view;
- pde->proc_fops = &debug_file_ops;
- id->proc_entries[i] = pde;
+ id->debugfs_entries[i] = pde;
}
spin_unlock_irqrestore(&id->lock, flags);
- out:
+out:
return rc;
}
* debug_unregister_view:
*/
-int debug_unregister_view(debug_info_t * id, struct debug_view *view)
+int
+debug_unregister_view(debug_info_t * id, struct debug_view *view)
{
int rc = 0;
int i;
if (i == DEBUG_MAX_VIEWS)
rc = -1;
else {
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(id->proc_entries[i]->name,
- id->proc_root_entry);
-#endif
+ debugfs_remove(id->debugfs_entries[i]);
id->views[i] = NULL;
rc = 0;
}
spin_unlock_irqrestore(&id->lock, flags);
- out:
+out:
+ return rc;
+}
+
+static inline char *
+debug_get_user_string(const char __user *user_buf, size_t user_len)
+{
+ char* buffer;
+
+ buffer = kmalloc(user_len + 1, GFP_KERNEL);
+ if (!buffer)
+ return ERR_PTR(-ENOMEM);
+ if (copy_from_user(buffer, user_buf, user_len) != 0) {
+ kfree(buffer);
+ return ERR_PTR(-EFAULT);
+ }
+ /* got the string, now strip linefeed. */
+ if (buffer[user_len - 1] == '\n')
+ buffer[user_len - 1] = 0;
+ else
+ buffer[user_len] = 0;
+ return buffer;
+}
+
+static inline int
+debug_get_uint(char *buf)
+{
+ int rc;
+
+ for(; isspace(*buf); buf++);
+ rc = simple_strtoul(buf, &buf, 10);
+ if(*buf){
+ printk("debug: no integer specified!\n");
+ rc = -EINVAL;
+ }
return rc;
}
* prints out actual debug level
*/
-static int debug_prolog_level_fn(debug_info_t * id,
+static int
+debug_prolog_pages_fn(debug_info_t * id,
struct debug_view *view, char *out_buf)
+{
+ return sprintf(out_buf, "%i\n", id->pages_per_area);
+}
+
+/*
+ * reads new size (number of pages per debug area)
+ */
+
+static int
+debug_input_pages_fn(debug_info_t * id, struct debug_view *view,
+ struct file *file, const char __user *user_buf,
+ size_t user_len, loff_t * offset)
+{
+ char *str;
+ int rc,new_pages;
+
+ if (user_len > 0x10000)
+ user_len = 0x10000;
+ if (*offset != 0){
+ rc = -EPIPE;
+ goto out;
+ }
+ str = debug_get_user_string(user_buf,user_len);
+ if(IS_ERR(str)){
+ rc = PTR_ERR(str);
+ goto out;
+ }
+ new_pages = debug_get_uint(str);
+ if(new_pages < 0){
+ rc = -EINVAL;
+ goto free_str;
+ }
+ rc = debug_set_size(id,id->nr_areas, new_pages);
+ if(rc != 0){
+ rc = -EINVAL;
+ goto free_str;
+ }
+ rc = user_len;
+free_str:
+ kfree(str);
+out:
+ *offset += user_len;
+ return rc; /* number of input characters */
+}
+
+/*
+ * prints out actual debug level
+ */
+
+static int
+debug_prolog_level_fn(debug_info_t * id, struct debug_view *view, char *out_buf)
{
int rc = 0;
- if(id->level == -1) rc = sprintf(out_buf,"-\n");
- else rc = sprintf(out_buf, "%i\n", id->level);
+ if(id->level == DEBUG_OFF_LEVEL) {
+ rc = sprintf(out_buf,"-\n");
+ }
+ else {
+ rc = sprintf(out_buf, "%i\n", id->level);
+ }
return rc;
}
* reads new debug level
*/
-static int debug_input_level_fn(debug_info_t * id, struct debug_view *view,
- struct file *file, const char __user *user_buf,
- size_t in_buf_size, loff_t * offset)
+static int
+debug_input_level_fn(debug_info_t * id, struct debug_view *view,
+ struct file *file, const char __user *user_buf,
+ size_t user_len, loff_t * offset)
{
- char input_buf[1];
- int rc = in_buf_size;
+ char *str;
+ int rc,new_level;
- if (*offset != 0)
+ if (user_len > 0x10000)
+ user_len = 0x10000;
+ if (*offset != 0){
+ rc = -EPIPE;
goto out;
- if (copy_from_user(input_buf, user_buf, 1)){
- rc = -EFAULT;
+ }
+ str = debug_get_user_string(user_buf,user_len);
+ if(IS_ERR(str)){
+ rc = PTR_ERR(str);
goto out;
}
- if (isdigit(input_buf[0])) {
- int new_level = ((int) input_buf[0] - (int) '0');
- debug_set_level(id, new_level);
- } else if(input_buf[0] == '-') {
+ if(str[0] == '-'){
debug_set_level(id, DEBUG_OFF_LEVEL);
+ rc = user_len;
+ goto free_str;
} else {
- printk(KERN_INFO "debug: level `%c` is not valid\n",
- input_buf[0]);
+ new_level = debug_get_uint(str);
}
- out:
- *offset += in_buf_size;
+ if(new_level < 0) {
+ printk(KERN_INFO "debug: level `%s` is not valid\n", str);
+ rc = -EINVAL;
+ } else {
+ debug_set_level(id, new_level);
+ rc = user_len;
+ }
+free_str:
+ kfree(str);
+out:
+ *offset += user_len;
return rc; /* number of input characters */
}
* flushes debug areas
*/
-void debug_flush(debug_info_t* id, int area)
+void
+debug_flush(debug_info_t* id, int area)
{
unsigned long flags;
- int i;
+ int i,j;
- if(!id)
+ if(!id || !id->areas)
return;
spin_lock_irqsave(&id->lock,flags);
if(area == DEBUG_FLUSH_ALL){
id->active_area = 0;
- memset(id->active_entry, 0, id->nr_areas * sizeof(int));
- for (i = 0; i < id->nr_areas; i++)
- memset(id->areas[i], 0, PAGE_SIZE << id->page_order);
+ memset(id->active_entries, 0, id->nr_areas * sizeof(int));
+ for (i = 0; i < id->nr_areas; i++) {
+ id->active_pages[i] = 0;
+ for(j = 0; j < id->pages_per_area; j++) {
+ memset(id->areas[i][j], 0, PAGE_SIZE);
+ }
+ }
printk(KERN_INFO "debug: %s: all areas flushed\n",id->name);
} else if(area >= 0 && area < id->nr_areas) {
- id->active_entry[area] = 0;
- memset(id->areas[area], 0, PAGE_SIZE << id->page_order);
- printk(KERN_INFO
- "debug: %s: area %i has been flushed\n",
+ id->active_entries[area] = 0;
+ id->active_pages[area] = 0;
+ for(i = 0; i < id->pages_per_area; i++) {
+ memset(id->areas[area][i],0,PAGE_SIZE);
+ }
+ printk(KERN_INFO "debug: %s: area %i has been flushed\n",
id->name, area);
} else {
printk(KERN_INFO
- "debug: %s: area %i cannot be flushed (range: %i - %i)\n",
+ "debug: %s: area %i cannot be flushed (range: %i - %i)\n",
id->name, area, 0, id->nr_areas-1);
}
spin_unlock_irqrestore(&id->lock,flags);
* view function: flushes debug areas
*/
-static int debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
- struct file *file, const char __user *user_buf,
- size_t in_buf_size, loff_t * offset)
+static int
+debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
+ struct file *file, const char __user *user_buf,
+ size_t user_len, loff_t * offset)
{
char input_buf[1];
- int rc = in_buf_size;
-
- if (*offset != 0)
+ int rc = user_len;
+
+ if (user_len > 0x10000)
+ user_len = 0x10000;
+ if (*offset != 0){
+ rc = -EPIPE;
goto out;
+ }
if (copy_from_user(input_buf, user_buf, 1)){
rc = -EFAULT;
goto out;
printk(KERN_INFO "debug: area `%c` is not valid\n", input_buf[0]);
- out:
- *offset += in_buf_size;
+out:
+ *offset += user_len;
return rc; /* number of input characters */
}
* prints debug header in raw format
*/
-int debug_raw_header_fn(debug_info_t * id, struct debug_view *view,
- int area, debug_entry_t * entry, char *out_buf)
+static int
+debug_raw_header_fn(debug_info_t * id, struct debug_view *view,
+ int area, debug_entry_t * entry, char *out_buf)
{
int rc;
* prints debug data in raw format
*/
-static int debug_raw_format_fn(debug_info_t * id, struct debug_view *view,
+static int
+debug_raw_format_fn(debug_info_t * id, struct debug_view *view,
char *out_buf, const char *in_buf)
{
int rc;
* prints debug data in hex/ascii format
*/
-static int debug_hex_ascii_format_fn(debug_info_t * id, struct debug_view *view,
- char *out_buf, const char *in_buf)
+static int
+debug_hex_ascii_format_fn(debug_info_t * id, struct debug_view *view,
+ char *out_buf, const char *in_buf)
{
int i, rc = 0;
* prints header for debug entry
*/
-int debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
+int
+debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
int area, debug_entry_t * entry, char *out_buf)
{
- struct timeval time_val;
+ struct timespec time_spec;
unsigned long long time;
char *except_str;
unsigned long caller;
time = entry->id.stck;
/* adjust todclock to 1970 */
time -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
- tod_to_timeval(time, &time_val);
+ tod_to_timeval(time, &time_spec);
if (entry->id.fields.exception)
except_str = "*";
except_str = "-";
caller = ((unsigned long) entry->caller) & PSW_ADDR_INSN;
rc += sprintf(out_buf, "%02i %011lu:%06lu %1u %1s %02i %p ",
- area, time_val.tv_sec, time_val.tv_usec, level,
+ area, time_spec.tv_sec, time_spec.tv_nsec / 1000, level,
except_str, entry->id.fields.cpuid, (void *) caller);
return rc;
}
#define DEBUG_SPRINTF_MAX_ARGS 10
-int debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
- char *out_buf, debug_sprintf_entry_t *curr_event)
+static int
+debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
+ char *out_buf, debug_sprintf_entry_t *curr_event)
{
int num_longs, num_used_args = 0,i, rc = 0;
int index[DEBUG_SPRINTF_MAX_ARGS];
/*
* clean up module
*/
-void __exit debug_exit(void)
+void
+__exit debug_exit(void)
{
-#ifdef DEBUG
- printk("debug_cleanup_module: \n");
-#endif
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(debug_proc_root_entry->name, NULL);
-#endif /* CONFIG_PROC_FS */
+ debugfs_remove(debug_debugfs_root_entry);
unregister_sysctl_table(s390dbf_sysctl_header);
return;
}
/*
* module definitions
*/
-core_initcall(debug_init);
+postcore_initcall(debug_init);
module_exit(debug_exit);
MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff