diff options
| -rw-r--r-- | arch/mips/lasat/picvue_proc.c | 113 |
1 files changed, 68 insertions, 45 deletions
diff --git a/arch/mips/lasat/picvue_proc.c b/arch/mips/lasat/picvue_proc.c index 0bb6037afba..8e388da1926 100644 --- a/arch/mips/lasat/picvue_proc.c +++ b/arch/mips/lasat/picvue_proc.c @@ -4,12 +4,14 @@ * Brian Murphy <brian.murphy@eicon.com> * */ +#include <linux/bug.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/proc_fs.h> +#include <linux/seq_file.h> #include <linux/interrupt.h> #include <linux/timer.h> @@ -38,12 +40,9 @@ static void pvc_display(unsigned long data) static DECLARE_TASKLET(pvc_display_tasklet, &pvc_display, 0); -static int pvc_proc_read_line(char *page, char **start, - off_t off, int count, - int *eof, void *data) +static int pvc_line_proc_show(struct seq_file *m, void *v) { - char *origpage = page; - int lineno = *(int *)data; + int lineno = *(int *)m->private; if (lineno < 0 || lineno > PVC_NLINES) { printk(KERN_WARNING "proc_read_line: invalid lineno %d\n", lineno); @@ -51,45 +50,66 @@ static int pvc_proc_read_line(char *page, char **start, } mutex_lock(&pvc_mutex); - page += sprintf(page, "%s\n", pvc_lines[lineno]); + seq_printf(m, "%s\n", pvc_lines[lineno]); mutex_unlock(&pvc_mutex); - return page - origpage; + return 0; } -static int pvc_proc_write_line(struct file *file, const char *buffer, - unsigned long count, void *data) +static int pvc_line_proc_open(struct inode *inode, struct file *file) { - int origcount = count; - int lineno = *(int *)data; + return single_open(file, pvc_line_proc_show, PDE(inode)->data); +} - if (lineno < 0 || lineno > PVC_NLINES) { - printk(KERN_WARNING "proc_write_line: invalid lineno %d\n", - lineno); - return origcount; - } +static ssize_t pvc_line_proc_write(struct file *file, const char __user *buf, + size_t count, loff_t *pos) +{ + int lineno = *(int *)PDE(file->f_path.dentry->d_inode)->data; + char kbuf[PVC_LINELEN]; + size_t len; + + BUG_ON(lineno < 0 || lineno > PVC_NLINES); - if (count > PVC_LINELEN) - count = PVC_LINELEN; + len = min(count, sizeof(kbuf) - 1); + if (copy_from_user(kbuf, buf, len)) + return -EFAULT; + kbuf[len] = '\0'; - if (buffer[count-1] == '\n') - count--; + if (len > 0 && kbuf[len - 1] == '\n') + len--; mutex_lock(&pvc_mutex); - strncpy(pvc_lines[lineno], buffer, count); - pvc_lines[lineno][count] = '\0'; + strncpy(pvc_lines[lineno], kbuf, len); + pvc_lines[lineno][len] = '\0'; mutex_unlock(&pvc_mutex); tasklet_schedule(&pvc_display_tasklet); - return origcount; + return count; } -static int pvc_proc_write_scroll(struct file *file, const char *buffer, - unsigned long count, void *data) +static const struct file_operations pvc_line_proc_fops = { + .owner = THIS_MODULE, + .open = pvc_line_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = pvc_line_proc_write, +}; + +static ssize_t pvc_scroll_proc_write(struct file *file, const char __user *buf, + size_t count, loff_t *pos) { - int origcount = count; - int cmd = simple_strtol(buffer, NULL, 10); + char kbuf[42]; + size_t len; + int cmd; + + len = min(count, sizeof(kbuf) - 1); + if (copy_from_user(kbuf, buf, len)) + return -EFAULT; + kbuf[len] = '\0'; + + cmd = simple_strtol(kbuf, NULL, 10); mutex_lock(&pvc_mutex); if (scroll_interval != 0) @@ -110,22 +130,31 @@ static int pvc_proc_write_scroll(struct file *file, const char *buffer, } mutex_unlock(&pvc_mutex); - return origcount; + return count; } -static int pvc_proc_read_scroll(char *page, char **start, - off_t off, int count, - int *eof, void *data) +static int pvc_scroll_proc_show(struct seq_file *m, void *v) { - char *origpage = page; - mutex_lock(&pvc_mutex); - page += sprintf(page, "%d\n", scroll_dir * scroll_interval); + seq_printf(m, "%d\n", scroll_dir * scroll_interval); mutex_unlock(&pvc_mutex); - return page - origpage; + return 0; } +static int pvc_scroll_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, pvc_scroll_proc_show, NULL); +} + +static const struct file_operations pvc_scroll_proc_fops = { + .owner = THIS_MODULE, + .open = pvc_scroll_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = pvc_scroll_proc_write, +}; void pvc_proc_timerfunc(unsigned long data) { @@ -163,22 +192,16 @@ static int __init pvc_proc_init(void) pvc_linedata[i] = i; } for (i = 0; i < PVC_NLINES; i++) { - proc_entry = create_proc_entry(pvc_linename[i], 0644, - pvc_display_dir); + proc_entry = proc_create_data(pvc_linename[i], 0644, pvc_display_dir, + &pvc_line_proc_fops, &pvc_linedata[i]); if (proc_entry == NULL) goto error; - - proc_entry->read_proc = pvc_proc_read_line; - proc_entry->write_proc = pvc_proc_write_line; - proc_entry->data = &pvc_linedata[i]; } - proc_entry = create_proc_entry("scroll", 0644, pvc_display_dir); + proc_entry = proc_create("scroll", 0644, pvc_display_dir, + &pvc_scroll_proc_fops); if (proc_entry == NULL) goto error; - proc_entry->write_proc = pvc_proc_write_scroll; - proc_entry->read_proc = pvc_proc_read_scroll; - init_timer(&timer); timer.function = pvc_proc_timerfunc; |