Don't use create_proc_entry() and create_proc_read_entry()

Don't use create_proc_entry() and create_proc_read_entry() as they
are deprecated, but rather use proc_create() and proc_create_data()
respectively and seq_file instead.

2 files changed, 77 insertions, 78 deletions

diff --git a/scull/main.c b/scull/main.c
index 791ab21..3946c8e 100644
--- a/scull/main.c
+++ b/scull/main.c
@@ -85,41 +85,34 @@ int scull_trim(struct scull_dev *dev)
  * The proc filesystem: function to read and entry
  */
 
-int scull_read_procmem(char *buf, char **start, off_t offset,
-                   int count, int *eof, void *data)
+int scull_read_procmem(struct seq_file *s, void *v)
 {
-	int i, j, len = 0;
-	int limit = count - 80; /* Don't print more than this */
-
-	for (i = 0; i < scull_nr_devs && len <= limit; i++) {
-		struct scull_dev *d = &scull_devices[i];
-		struct scull_qset *qs = d->data;
-		if (down_interruptible(&d->sem))
-			return -ERESTARTSYS;
-		len += sprintf(buf+len,"\nDevice %i: qset %i, q %i, sz %li\n",
-				i, d->qset, d->quantum, d->size);
-		for (; qs && len <= limit; qs = qs->next) { /* scan the list */
-			len += sprintf(buf + len, "  item at %p, qset at %p\n",
-					qs, qs->data);
-			if (qs->data && !qs->next) /* dump only the last item */
-				for (j = 0; j < d->qset; j++) {
-					if (qs->data[j])
-						len += sprintf(buf + len,
-								"    % 4i: %8p\n",
-								j, qs->data[j]);
-				}
-		}
-		up(&scull_devices[i].sem);
-	}
-	*eof = 1;
-	return len;
+        int i, j;
+        int limit = s->size - 80; /* Don't print more than this */
+
+        for (i = 0; i < scull_nr_devs && s->count <= limit; i++) {
+                struct scull_dev *d = &scull_devices[i];
+                struct scull_qset *qs = d->data;
+                if (down_interruptible(&d->sem))
+                        return -ERESTARTSYS;
+                seq_printf(s,"\nDevice %i: qset %i, q %i, sz %li\n",
+                             i, d->qset, d->quantum, d->size);
+                for (; qs && s->count <= limit; qs = qs->next) { /* scan the list */
+                        seq_printf(s, "  item at %p, qset at %p\n",
+                                     qs, qs->data);
+                        if (qs->data && !qs->next) /* dump only the last item */
+                                for (j = 0; j < d->qset; j++) {
+                                        if (qs->data[j])
+                                                seq_printf(s, "    % 4i: %8p\n",
+                                                             j, qs->data[j]);
+                                }
+                }
+                up(&scull_devices[i].sem);
+        }
+        return 0;
 }
 
 
-/*
- * For now, the seq_file implementation will exist in parallel.  The
- * older read_procmem function should maybe go away, though.
- */
 
 /*
  * Here are our sequence iteration methods.  Our "position" is
@@ -180,20 +173,33 @@ static struct seq_operations scull_seq_ops = {
 };
 
 /*
- * Now to implement the /proc file we need only make an open
+ * Now to implement the /proc files we need only make an open
  * method which sets up the sequence operators.
  */
-static int scull_proc_open(struct inode *inode, struct file *file)
+static int scullmem_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, scull_read_procmem, NULL);
+}
+
+static int scullseq_proc_open(struct inode *inode, struct file *file)
 {
 	return seq_open(file, &scull_seq_ops);
 }
 
 /*
- * Create a set of file operations for our proc file.
+ * Create a set of file operations for our proc files.
  */
-static struct file_operations scull_proc_ops = {
+static struct file_operations scullmem_proc_ops = {
+        .owner   = THIS_MODULE,
+        .open    = scullmem_proc_open,
+        .read    = seq_read,
+        .llseek  = seq_lseek,
+        .release = single_release
+};
+
+static struct file_operations scullseq_proc_ops = {
 	.owner   = THIS_MODULE,
-	.open    = scull_proc_open,
+	.open    = scullseq_proc_open,
 	.read    = seq_read,
 	.llseek  = seq_lseek,
 	.release = seq_release
@@ -206,13 +212,10 @@ static struct file_operations scull_proc_ops = {
 
 static void scull_create_proc(void)
 {
-	struct proc_dir_entry *entry;
-	create_proc_read_entry("scullmem", 0 /* default mode */,
-			NULL /* parent dir */, scull_read_procmem,
-			NULL /* client data */);
-	entry = create_proc_entry("scullseq", 0, NULL);
-	if (entry)
-		entry->proc_fops = &scull_proc_ops;
+        proc_create_data("scullmem", 0 /* default mode */,
+                        NULL /* parent dir */, &scullmem_proc_ops,
+                        NULL /* client data */);
+        proc_create("scullseq", 0, NULL, &scullseq_proc_ops);
 }
 
 static void scull_remove_proc(void)
diff --git a/scull/pipe.c b/scull/pipe.c
index cba06a3..3e7b8cd 100644
--- a/scull/pipe.c
+++ b/scull/pipe.c
@@ -28,6 +28,7 @@
 #include <linux/cdev.h>
 #include <asm/uaccess.h>
 #include <linux/sched.h>
+#include <linux/seq_file.h>
 
 #include "scull.h"		/* local definitions */
 
@@ -262,46 +263,40 @@ static int scull_p_fasync(int fd, struct file *filp, int mode)
 
 /* FIXME this should use seq_file */
 #ifdef SCULL_DEBUG
-static void scullp_proc_offset(char *buf, char **start, off_t *offset, int *len)
+
+static int scull_read_p_mem(struct seq_file *s, void *v)
 {
-	if (*offset == 0)
-		return;
-	if (*offset >= *len) {	/* Not there yet */
-		*offset -= *len;
-		*len = 0;
-	}
-	else {			/* We're into the interesting stuff now */
-		*start = buf + *offset;
-		*offset = 0;
-	}
+     int i;
+     struct scull_pipe *p;
+
+#define LIMIT (PAGE_SIZE-200)        /* don't print any more after this size */
+     seq_printf(s, "Default buffersize is %i\n", scull_p_buffer);
+     for(i = 0; i<scull_p_nr_devs && s->count <= LIMIT; i++) {
+             p = &scull_p_devices[i];
+             if (down_interruptible(&p->sem))
+                     return -ERESTARTSYS;
+             seq_printf(s, "\nDevice %i: %p\n", i, p);
+/*           seq_printf(s, "   Queues: %p %p\n", p->inq, p->outq);*/
+             seq_printf(s, "   Buffer: %p to %p (%i bytes)\n", p->buffer, p->end, p->buffersize);
+             seq_printf(s, "   rp %p   wp %p\n", p->rp, p->wp);
+             seq_printf(s, "   readers %i   writers %i\n", p->nreaders, p->nwriters);
+             up(&p->sem);
+     }
+     return 0;
 }
 
-
-static int scull_read_p_mem(char *buf, char **start, off_t offset, int count,
-		int *eof, void *data)
+static int scullpipe_proc_open(struct inode *inode, struct file *file)
 {
-	int i, len;
-	struct scull_pipe *p;
-
-#define LIMIT (PAGE_SIZE-200)	/* don't print any more after this size */
-	*start = buf;
-	len = sprintf(buf, "Default buffersize is %i\n", scull_p_buffer);
-	for(i = 0; i<scull_p_nr_devs && len <= LIMIT; i++) {
-		p = &scull_p_devices[i];
-		if (down_interruptible(&p->sem))
-			return -ERESTARTSYS;
-		len += sprintf(buf+len, "\nDevice %i: %p\n", i, p);
-/*		len += sprintf(buf+len, "   Queues: %p %p\n", p->inq, p->outq);*/
-		len += sprintf(buf+len, "   Buffer: %p to %p (%i bytes)\n", p->buffer, p->end, p->buffersize);
-		len += sprintf(buf+len, "   rp %p   wp %p\n", p->rp, p->wp);
-		len += sprintf(buf+len, "   readers %i   writers %i\n", p->nreaders, p->nwriters);
-		up(&p->sem);
-		scullp_proc_offset(buf, start, &offset, &len);
-	}
-	*eof = (len <= LIMIT);
-	return len;
+        return single_open(file, scull_read_p_mem, NULL);
 }
 
+static struct file_operations scullpipe_proc_ops = {
+        .owner   = THIS_MODULE,
+        .open    = scullpipe_proc_open,
+        .read    = seq_read,
+        .llseek  = seq_lseek,
+        .release = single_release
+};
 
 #endif
 
@@ -367,7 +362,8 @@ int scull_p_init(dev_t firstdev)
 		scull_p_setup_cdev(scull_p_devices + i, i);
 	}
 #ifdef SCULL_DEBUG
-	create_proc_read_entry("scullpipe", 0, NULL, scull_read_p_mem, NULL);
+	//create_proc_read_entry("scullpipe", 0, NULL, scull_read_p_mem, NULL);
+        proc_create("scullpipe", 0, NULL, &scullpipe_proc_ops);
 #endif
 	return scull_p_nr_devs;
 }