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Diffstat (limited to 'arch/alpha/kernel/srm_env.c')
-rw-r--r--arch/alpha/kernel/srm_env.c153
1 files changed, 42 insertions, 111 deletions
diff --git a/arch/alpha/kernel/srm_env.c b/arch/alpha/kernel/srm_env.c
index f7dd081d57f..ffe996a54fa 100644
--- a/arch/alpha/kernel/srm_env.c
+++ b/arch/alpha/kernel/srm_env.c
@@ -4,9 +4,8 @@
*
* (C) 2001,2002,2006 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
*
- * This driver is at all a modified version of Erik Mouw's
- * Documentation/DocBook/procfs_example.c, so: thank
- * you, Erik! He can be reached via email at
+ * This driver is a modified version of Erik Mouw's example proc
+ * interface, so: thank you, Erik! He can be reached via email at
* <J.A.K.Mouw@its.tudelft.nl>. It is based on an idea
* provided by DEC^WCompaq^WIntel's "Jumpstart" CD. They
* included a patch like this as well. Thanks for idea!
@@ -30,9 +29,11 @@
*/
#include <linux/kernel.h>
+#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <asm/console.h>
#include <asm/uaccess.h>
#include <asm/machvec.h>
@@ -50,13 +51,11 @@ MODULE_LICENSE("GPL");
typedef struct _srm_env {
char *name;
unsigned long id;
- struct proc_dir_entry *proc_entry;
} srm_env_t;
static struct proc_dir_entry *base_dir;
static struct proc_dir_entry *named_dir;
static struct proc_dir_entry *numbered_dir;
-static char number[256][4];
static srm_env_t srm_named_entries[] = {
{ "auto_action", ENV_AUTO_ACTION },
@@ -76,45 +75,41 @@ static srm_env_t srm_named_entries[] = {
{ "tty_dev", ENV_TTY_DEV },
{ NULL, 0 },
};
-static srm_env_t srm_numbered_entries[256];
-
-static int
-srm_env_read(char *page, char **start, off_t off, int count, int *eof,
- void *data)
+static int srm_env_proc_show(struct seq_file *m, void *v)
{
- int nbytes;
unsigned long ret;
- srm_env_t *entry;
+ unsigned long id = (unsigned long)m->private;
+ char *page;
- if (off != 0) {
- *eof = 1;
- return 0;
- }
+ page = (char *)__get_free_page(GFP_USER);
+ if (!page)
+ return -ENOMEM;
- entry = (srm_env_t *) data;
- ret = callback_getenv(entry->id, page, count);
+ ret = callback_getenv(id, page, PAGE_SIZE);
if ((ret >> 61) == 0) {
- nbytes = (int) ret;
- *eof = 1;
+ seq_write(m, page, ret);
+ ret = 0;
} else
- nbytes = -EFAULT;
+ ret = -EFAULT;
+ free_page((unsigned long)page);
+ return ret;
+}
- return nbytes;
+static int srm_env_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, srm_env_proc_show, PDE_DATA(inode));
}
-static int
-srm_env_write(struct file *file, const char __user *buffer, unsigned long count,
- void *data)
+static ssize_t srm_env_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
{
int res;
- srm_env_t *entry;
+ unsigned long id = (unsigned long)PDE_DATA(file_inode(file));
char *buf = (char *) __get_free_page(GFP_USER);
unsigned long ret1, ret2;
- entry = (srm_env_t *) data;
-
if (!buf)
return -ENOMEM;
@@ -127,7 +122,7 @@ srm_env_write(struct file *file, const char __user *buffer, unsigned long count,
goto out;
buf[count] = '\0';
- ret1 = callback_setenv(entry->id, buf, count);
+ ret1 = callback_setenv(id, buf, count);
if ((ret1 >> 61) == 0) {
do
ret2 = callback_save_env();
@@ -140,51 +135,14 @@ srm_env_write(struct file *file, const char __user *buffer, unsigned long count,
return res;
}
-static void
-srm_env_cleanup(void)
-{
- srm_env_t *entry;
- unsigned long var_num;
-
- if (base_dir) {
- /*
- * Remove named entries
- */
- if (named_dir) {
- entry = srm_named_entries;
- while (entry->name != NULL && entry->id != 0) {
- if (entry->proc_entry) {
- remove_proc_entry(entry->name,
- named_dir);
- entry->proc_entry = NULL;
- }
- entry++;
- }
- remove_proc_entry(NAMED_DIR, base_dir);
- }
-
- /*
- * Remove numbered entries
- */
- if (numbered_dir) {
- for (var_num = 0; var_num <= 255; var_num++) {
- entry = &srm_numbered_entries[var_num];
-
- if (entry->proc_entry) {
- remove_proc_entry(entry->name,
- numbered_dir);
- entry->proc_entry = NULL;
- entry->name = NULL;
- }
- }
- remove_proc_entry(NUMBERED_DIR, base_dir);
- }
-
- remove_proc_entry(BASE_DIR, NULL);
- }
-
- return;
-}
+static const struct file_operations srm_env_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = srm_env_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = srm_env_proc_write,
+};
static int __init
srm_env_init(void)
@@ -199,26 +157,19 @@ srm_env_init(void)
printk(KERN_INFO "%s: This Alpha system doesn't "
"know about SRM (or you've booted "
"SRM->MILO->Linux, which gets "
- "misdetected)...\n", __FUNCTION__);
+ "misdetected)...\n", __func__);
return -ENODEV;
}
/*
- * Init numbers
- */
- for (var_num = 0; var_num <= 255; var_num++)
- sprintf(number[var_num], "%ld", var_num);
-
- /*
* Create base directory
*/
base_dir = proc_mkdir(BASE_DIR, NULL);
if (!base_dir) {
printk(KERN_ERR "Couldn't create base dir /proc/%s\n",
BASE_DIR);
- goto cleanup;
+ return -ENOMEM;
}
- base_dir->owner = THIS_MODULE;
/*
* Create per-name subdirectory
@@ -229,7 +180,6 @@ srm_env_init(void)
BASE_DIR, NAMED_DIR);
goto cleanup;
}
- named_dir->owner = THIS_MODULE;
/*
* Create per-number subdirectory
@@ -241,23 +191,15 @@ srm_env_init(void)
goto cleanup;
}
- numbered_dir->owner = THIS_MODULE;
/*
* Create all named nodes
*/
entry = srm_named_entries;
while (entry->name && entry->id) {
- entry->proc_entry = create_proc_entry(entry->name,
- 0644, named_dir);
- if (!entry->proc_entry)
+ if (!proc_create_data(entry->name, 0644, named_dir,
+ &srm_env_proc_fops, (void *)entry->id))
goto cleanup;
-
- entry->proc_entry->data = (void *) entry;
- entry->proc_entry->owner = THIS_MODULE;
- entry->proc_entry->read_proc = srm_env_read;
- entry->proc_entry->write_proc = srm_env_write;
-
entry++;
}
@@ -265,19 +207,11 @@ srm_env_init(void)
* Create all numbered nodes
*/
for (var_num = 0; var_num <= 255; var_num++) {
- entry = &srm_numbered_entries[var_num];
- entry->name = number[var_num];
-
- entry->proc_entry = create_proc_entry(entry->name,
- 0644, numbered_dir);
- if (!entry->proc_entry)
+ char name[4];
+ sprintf(name, "%ld", var_num);
+ if (!proc_create_data(name, 0644, numbered_dir,
+ &srm_env_proc_fops, (void *)var_num))
goto cleanup;
-
- entry->id = var_num;
- entry->proc_entry->data = (void *) entry;
- entry->proc_entry->owner = THIS_MODULE;
- entry->proc_entry->read_proc = srm_env_read;
- entry->proc_entry->write_proc = srm_env_write;
}
printk(KERN_INFO "%s: version %s loaded successfully\n", NAME,
@@ -286,18 +220,15 @@ srm_env_init(void)
return 0;
cleanup:
- srm_env_cleanup();
-
+ remove_proc_subtree(BASE_DIR, NULL);
return -ENOMEM;
}
static void __exit
srm_env_exit(void)
{
- srm_env_cleanup();
+ remove_proc_subtree(BASE_DIR, NULL);
printk(KERN_INFO "%s: unloaded successfully\n", NAME);
-
- return;
}
module_init(srm_env_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 12:56:59 +0000