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path: root/drivers/misc/ibmasm/ibmasmfs.c
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Diffstat (limited to 'drivers/misc/ibmasm/ibmasmfs.c')
-rw-r--r--drivers/misc/ibmasm/ibmasmfs.c121
1 files changed, 56 insertions, 65 deletions
diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c
index 5c550fcac2c..e8b933111e0 100644
--- a/drivers/misc/ibmasm/ibmasmfs.c
+++ b/drivers/misc/ibmasm/ibmasmfs.c
@@ -17,19 +17,19 @@
*
* Copyright (C) IBM Corporation, 2004
*
- * Author: Max Asböck <amax@us.ibm.com>
+ * Author: Max Asböck <amax@us.ibm.com>
*
*/
/*
- * Parts of this code are based on an article by Jonathan Corbet
+ * Parts of this code are based on an article by Jonathan Corbet
* that appeared in Linux Weekly News.
*/
/*
* The IBMASM file virtual filesystem. It creates the following hierarchy
- * dymamically when mounted from user space:
+ * dynamically when mounted from user space:
*
* /ibmasm
* |-- 0
@@ -55,26 +55,27 @@
* For each service processor the following files are created:
*
* command: execute dot commands
- * write: execute a dot command on the service processor
- * read: return the result of a previously executed dot command
+ * write: execute a dot command on the service processor
+ * read: return the result of a previously executed dot command
*
* events: listen for service processor events
- * read: sleep (interruptible) until an event occurs
+ * read: sleep (interruptible) until an event occurs
* write: wakeup sleeping event listener
*
* reverse_heartbeat: send a heartbeat to the service processor
- * read: sleep (interruptible) until the reverse heartbeat fails
+ * read: sleep (interruptible) until the reverse heartbeat fails
* write: wakeup sleeping heartbeat listener
*
* remote_video/width
* remote_video/height
* remote_video/width: control remote display settings
- * write: set value
- * read: read value
+ * write: set value
+ * read: read value
*/
#include <linux/fs.h>
#include <linux/pagemap.h>
+#include <linux/slab.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include "ibmasm.h"
@@ -86,34 +87,34 @@
static LIST_HEAD(service_processors);
static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode);
-static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root);
+static void ibmasmfs_create_files (struct super_block *sb);
static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent);
-static struct super_block *ibmasmfs_get_super(struct file_system_type *fst,
+static struct dentry *ibmasmfs_mount(struct file_system_type *fst,
int flags, const char *name, void *data)
{
- return get_sb_single(fst, flags, data, ibmasmfs_fill_super);
+ return mount_single(fst, flags, data, ibmasmfs_fill_super);
}
-static struct super_operations ibmasmfs_s_ops = {
+static const struct super_operations ibmasmfs_s_ops = {
.statfs = simple_statfs,
.drop_inode = generic_delete_inode,
};
-static struct file_operations *ibmasmfs_dir_ops = &simple_dir_operations;
+static const struct file_operations *ibmasmfs_dir_ops = &simple_dir_operations;
static struct file_system_type ibmasmfs_type = {
.owner = THIS_MODULE,
.name = "ibmasmfs",
- .get_sb = ibmasmfs_get_super,
+ .mount = ibmasmfs_mount,
.kill_sb = kill_litter_super,
};
+MODULE_ALIAS_FS("ibmasmfs");
static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent)
{
struct inode *root;
- struct dentry *root_dentry;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
@@ -128,14 +129,11 @@ static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent)
root->i_op = &simple_dir_inode_operations;
root->i_fop = ibmasmfs_dir_ops;
- root_dentry = d_alloc_root(root);
- if (!root_dentry) {
- iput(root);
+ sb->s_root = d_make_root(root);
+ if (!sb->s_root)
return -ENOMEM;
- }
- sb->s_root = root_dentry;
- ibmasmfs_create_files(sb, root_dentry);
+ ibmasmfs_create_files(sb);
return 0;
}
@@ -144,19 +142,16 @@ static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode)
struct inode *ret = new_inode(sb);
if (ret) {
+ ret->i_ino = get_next_ino();
ret->i_mode = mode;
- ret->i_uid = ret->i_gid = 0;
- ret->i_blksize = PAGE_CACHE_SIZE;
- ret->i_blocks = 0;
ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
}
return ret;
}
-static struct dentry *ibmasmfs_create_file (struct super_block *sb,
- struct dentry *parent,
- const char *name,
- struct file_operations *fops,
+static struct dentry *ibmasmfs_create_file(struct dentry *parent,
+ const char *name,
+ const struct file_operations *fops,
void *data,
int mode)
{
@@ -167,21 +162,20 @@ static struct dentry *ibmasmfs_create_file (struct super_block *sb,
if (!dentry)
return NULL;
- inode = ibmasmfs_make_inode(sb, S_IFREG | mode);
+ inode = ibmasmfs_make_inode(parent->d_sb, S_IFREG | mode);
if (!inode) {
dput(dentry);
return NULL;
}
inode->i_fop = fops;
- inode->u.generic_ip = data;
+ inode->i_private = data;
d_add(dentry, inode);
return dentry;
}
-static struct dentry *ibmasmfs_create_dir (struct super_block *sb,
- struct dentry *parent,
+static struct dentry *ibmasmfs_create_dir(struct dentry *parent,
const char *name)
{
struct dentry *dentry;
@@ -191,7 +185,7 @@ static struct dentry *ibmasmfs_create_dir (struct super_block *sb,
if (!dentry)
return NULL;
- inode = ibmasmfs_make_inode(sb, S_IFDIR | 0500);
+ inode = ibmasmfs_make_inode(parent->d_sb, S_IFDIR | 0500);
if (!inode) {
dput(dentry);
return NULL;
@@ -243,7 +237,7 @@ static int command_file_open(struct inode *inode, struct file *file)
{
struct ibmasmfs_command_data *command_data;
- if (!inode->u.generic_ip)
+ if (!inode->i_private)
return -ENODEV;
command_data = kmalloc(sizeof(struct ibmasmfs_command_data), GFP_KERNEL);
@@ -251,7 +245,7 @@ static int command_file_open(struct inode *inode, struct file *file)
return -ENOMEM;
command_data->command = NULL;
- command_data->sp = inode->u.generic_ip;
+ command_data->sp = inode->i_private;
file->private_data = command_data;
return 0;
}
@@ -261,7 +255,7 @@ static int command_file_close(struct inode *inode, struct file *file)
struct ibmasmfs_command_data *command_data = file->private_data;
if (command_data->command)
- command_put(command_data->command);
+ command_put(command_data->command);
kfree(command_data);
return 0;
@@ -348,12 +342,12 @@ static ssize_t command_file_write(struct file *file, const char __user *ubuff, s
static int event_file_open(struct inode *inode, struct file *file)
{
struct ibmasmfs_event_data *event_data;
- struct service_processor *sp;
+ struct service_processor *sp;
- if (!inode->u.generic_ip)
+ if (!inode->i_private)
return -ENODEV;
- sp = inode->u.generic_ip;
+ sp = inode->i_private;
event_data = kmalloc(sizeof(struct ibmasmfs_event_data), GFP_KERNEL);
if (!event_data)
@@ -438,14 +432,14 @@ static int r_heartbeat_file_open(struct inode *inode, struct file *file)
{
struct ibmasmfs_heartbeat_data *rhbeat;
- if (!inode->u.generic_ip)
+ if (!inode->i_private)
return -ENODEV;
rhbeat = kmalloc(sizeof(struct ibmasmfs_heartbeat_data), GFP_KERNEL);
if (!rhbeat)
return -ENOMEM;
- rhbeat->sp = (struct service_processor *)inode->u.generic_ip;
+ rhbeat->sp = inode->i_private;
rhbeat->active = 0;
ibmasm_init_reverse_heartbeat(rhbeat->sp, &rhbeat->heartbeat);
file->private_data = rhbeat;
@@ -505,12 +499,6 @@ static ssize_t r_heartbeat_file_write(struct file *file, const char __user *buf,
return 1;
}
-static int remote_settings_file_open(struct inode *inode, struct file *file)
-{
- file->private_data = inode->u.generic_ip;
- return 0;
-}
-
static int remote_settings_file_close(struct inode *inode, struct file *file)
{
return 0;
@@ -563,17 +551,16 @@ static ssize_t remote_settings_file_write(struct file *file, const char __user *
if (*offset != 0)
return 0;
- buff = kmalloc (count + 1, GFP_KERNEL);
+ buff = kzalloc (count + 1, GFP_KERNEL);
if (!buff)
return -ENOMEM;
- memset(buff, 0x0, count + 1);
if (copy_from_user(buff, ubuff, count)) {
kfree(buff);
return -EFAULT;
}
-
+
value = simple_strtoul(buff, NULL, 10);
writel(value, address);
kfree(buff);
@@ -581,36 +568,40 @@ static ssize_t remote_settings_file_write(struct file *file, const char __user *
return count;
}
-static struct file_operations command_fops = {
+static const struct file_operations command_fops = {
.open = command_file_open,
.release = command_file_close,
.read = command_file_read,
.write = command_file_write,
+ .llseek = generic_file_llseek,
};
-static struct file_operations event_fops = {
+static const struct file_operations event_fops = {
.open = event_file_open,
.release = event_file_close,
.read = event_file_read,
.write = event_file_write,
+ .llseek = generic_file_llseek,
};
-static struct file_operations r_heartbeat_fops = {
+static const struct file_operations r_heartbeat_fops = {
.open = r_heartbeat_file_open,
.release = r_heartbeat_file_close,
.read = r_heartbeat_file_read,
.write = r_heartbeat_file_write,
+ .llseek = generic_file_llseek,
};
-static struct file_operations remote_settings_fops = {
- .open = remote_settings_file_open,
+static const struct file_operations remote_settings_fops = {
+ .open = simple_open,
.release = remote_settings_file_close,
.read = remote_settings_file_read,
.write = remote_settings_file_write,
+ .llseek = generic_file_llseek,
};
-static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root)
+static void ibmasmfs_create_files (struct super_block *sb)
{
struct list_head *entry;
struct service_processor *sp;
@@ -619,20 +610,20 @@ static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root)
struct dentry *dir;
struct dentry *remote_dir;
sp = list_entry(entry, struct service_processor, node);
- dir = ibmasmfs_create_dir(sb, root, sp->dirname);
+ dir = ibmasmfs_create_dir(sb->s_root, sp->dirname);
if (!dir)
continue;
- ibmasmfs_create_file(sb, dir, "command", &command_fops, sp, S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, dir, "event", &event_fops, sp, S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, dir, "reverse_heartbeat", &r_heartbeat_fops, sp, S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(dir, "command", &command_fops, sp, S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(dir, "event", &event_fops, sp, S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(dir, "reverse_heartbeat", &r_heartbeat_fops, sp, S_IRUSR|S_IWUSR);
- remote_dir = ibmasmfs_create_dir(sb, dir, "remote_video");
+ remote_dir = ibmasmfs_create_dir(dir, "remote_video");
if (!remote_dir)
continue;
- ibmasmfs_create_file(sb, remote_dir, "width", &remote_settings_fops, (void *)display_width(sp), S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, remote_dir, "height", &remote_settings_fops, (void *)display_height(sp), S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, remote_dir, "depth", &remote_settings_fops, (void *)display_depth(sp), S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(remote_dir, "width", &remote_settings_fops, (void *)display_width(sp), S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(remote_dir, "height", &remote_settings_fops, (void *)display_height(sp), S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(remote_dir, "depth", &remote_settings_fops, (void *)display_depth(sp), S_IRUSR|S_IWUSR);
}
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 23:31:39 +0000