* POSIX message queues filesystem for Linux.
*
* Copyright (C) 2003,2004 Krzysztof Benedyczak (golbi@mat.uni.torun.pl)
- * Michal Wronski (Michal.Wronski@motorola.com)
+ * Michal Wronski (michal.wronski@gmail.com)
*
* Spinlocks: Mohamed Abbas (abbas.mohamed@intel.com)
* Lockless receive & send, fd based notify:
#define STATE_PENDING 1
#define STATE_READY 2
-/* used by sysctl */
-#define FS_MQUEUE 1
-#define CTL_QUEUESMAX 2
-#define CTL_MSGMAX 3
-#define CTL_MSGSIZEMAX 4
-
/* default values */
#define DFLT_QUEUESMAX 256 /* max number of message queues */
#define DFLT_MSGMAX 10 /* max number of messages in each queue */
unsigned long qsize; /* size of queue in memory (sum of all msgs) */
};
-static struct inode_operations mqueue_dir_inode_operations;
-static struct file_operations mqueue_file_operations;
+static const struct inode_operations mqueue_dir_inode_operations;
+static const struct file_operations mqueue_file_operations;
static struct super_operations mqueue_super_ops;
static void remove_notification(struct mqueue_inode_info *info);
static spinlock_t mq_lock;
-static kmem_cache_t *mqueue_inode_cachep;
+static struct kmem_cache *mqueue_inode_cachep;
static struct vfsmount *mqueue_mnt;
static unsigned int queues_count;
return get_sb_single(fs_type, flags, data, mqueue_fill_super, mnt);
}
-static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
+static void init_once(struct kmem_cache *cachep, void *foo)
{
struct mqueue_inode_info *p = (struct mqueue_inode_info *) foo;
- if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR)
- inode_init_once(&p->vfs_inode);
+ inode_init_once(&p->vfs_inode);
}
static struct inode *mqueue_alloc_inode(struct super_block *sb)
{
struct mqueue_inode_info *ei;
- ei = kmem_cache_alloc(mqueue_inode_cachep, SLAB_KERNEL);
+ ei = kmem_cache_alloc(mqueue_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
return &ei->vfs_inode;
static ssize_t mqueue_read_file(struct file *filp, char __user *u_data,
size_t count, loff_t * off)
{
- struct mqueue_inode_info *info = MQUEUE_I(filp->f_dentry->d_inode);
+ struct mqueue_inode_info *info = MQUEUE_I(filp->f_path.dentry->d_inode);
char buffer[FILENT_SIZE];
size_t slen;
loff_t o;
return -EFAULT;
*off = o + count;
- filp->f_dentry->d_inode->i_atime = filp->f_dentry->d_inode->i_ctime = CURRENT_TIME;
+ filp->f_path.dentry->d_inode->i_atime = filp->f_path.dentry->d_inode->i_ctime = CURRENT_TIME;
return count;
}
static int mqueue_flush_file(struct file *filp, fl_owner_t id)
{
- struct mqueue_inode_info *info = MQUEUE_I(filp->f_dentry->d_inode);
+ struct mqueue_inode_info *info = MQUEUE_I(filp->f_path.dentry->d_inode);
spin_lock(&info->lock);
if (task_tgid(current) == info->notify_owner)
static unsigned int mqueue_poll_file(struct file *filp, struct poll_table_struct *poll_tab)
{
- struct mqueue_inode_info *info = MQUEUE_I(filp->f_dentry->d_inode);
+ struct mqueue_inode_info *info = MQUEUE_I(filp->f_path.dentry->d_inode);
int retval = 0;
poll_wait(filp, &info->wait_q, poll_tab);
break;
case SIGEV_THREAD:
set_cookie(info->notify_cookie, NOTIFY_WOKENUP);
- netlink_sendskb(info->notify_sock,
- info->notify_cookie, 0);
+ netlink_sendskb(info->notify_sock, info->notify_cookie);
break;
}
/* after notification unregisters process */
if (info->notify_owner != NULL &&
info->notify.sigev_notify == SIGEV_THREAD) {
set_cookie(info->notify_cookie, NOTIFY_REMOVED);
- netlink_sendskb(info->notify_sock, info->notify_cookie, 0);
+ netlink_sendskb(info->notify_sock, info->notify_cookie);
}
put_pid(info->notify_owner);
info->notify_owner = NULL;
if (oflag & O_CREAT) {
if (dentry->d_inode) { /* entry already exists */
+ audit_inode(name, dentry->d_inode);
error = -EEXIST;
if (oflag & O_EXCL)
goto out;
error = -ENOENT;
if (!dentry->d_inode)
goto out;
+ audit_inode(name, dentry->d_inode);
filp = do_open(dentry, oflag);
}
if (IS_ERR(name))
return PTR_ERR(name);
- mutex_lock(&mqueue_mnt->mnt_root->d_inode->i_mutex);
+ mutex_lock_nested(&mqueue_mnt->mnt_root->d_inode->i_mutex,
+ I_MUTEX_PARENT);
dentry = lookup_one_len(name, mqueue_mnt->mnt_root, strlen(name));
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
if (unlikely(!filp))
goto out;
- inode = filp->f_dentry->d_inode;
+ inode = filp->f_path.dentry->d_inode;
if (unlikely(filp->f_op != &mqueue_file_operations))
goto out_fput;
info = MQUEUE_I(inode);
+ audit_inode(NULL, inode);
if (unlikely(!(filp->f_mode & FMODE_WRITE)))
goto out_fput;
if (unlikely(!filp))
goto out;
- inode = filp->f_dentry->d_inode;
+ inode = filp->f_path.dentry->d_inode;
if (unlikely(filp->f_op != &mqueue_file_operations))
goto out_fput;
info = MQUEUE_I(inode);
+ audit_inode(NULL, inode);
if (unlikely(!(filp->f_mode & FMODE_READ)))
goto out_fput;
if (!filp)
goto out;
- inode = filp->f_dentry->d_inode;
+ inode = filp->f_path.dentry->d_inode;
if (unlikely(filp->f_op != &mqueue_file_operations))
goto out_fput;
info = MQUEUE_I(inode);
if (!filp)
goto out;
- inode = filp->f_dentry->d_inode;
+ inode = filp->f_path.dentry->d_inode;
if (unlikely(filp->f_op != &mqueue_file_operations))
goto out_fput;
info = MQUEUE_I(inode);
return ret;
}
-static struct inode_operations mqueue_dir_inode_operations = {
+static const struct inode_operations mqueue_dir_inode_operations = {
.lookup = simple_lookup,
.create = mqueue_create,
.unlink = mqueue_unlink,
};
-static struct file_operations mqueue_file_operations = {
+static const struct file_operations mqueue_file_operations = {
.flush = mqueue_flush_file,
.poll = mqueue_poll_file,
.read = mqueue_read_file,
static ctl_table mq_sysctls[] = {
{
- .ctl_name = CTL_QUEUESMAX,
.procname = "queues_max",
.data = &queues_max,
.maxlen = sizeof(int),
.proc_handler = &proc_dointvec,
},
{
- .ctl_name = CTL_MSGMAX,
.procname = "msg_max",
.data = &msg_max,
.maxlen = sizeof(int),
.extra2 = &msg_max_limit_max,
},
{
- .ctl_name = CTL_MSGSIZEMAX,
.procname = "msgsize_max",
.data = &msgsize_max,
.maxlen = sizeof(int),
static ctl_table mq_sysctl_dir[] = {
{
- .ctl_name = FS_MQUEUE,
.procname = "mqueue",
.mode = 0555,
.child = mq_sysctls,
mqueue_inode_cachep = kmem_cache_create("mqueue_inode_cache",
sizeof(struct mqueue_inode_info), 0,
- SLAB_HWCACHE_ALIGN, init_once, NULL);
+ SLAB_HWCACHE_ALIGN, init_once);
if (mqueue_inode_cachep == NULL)
return -ENOMEM;
/* ignore failues - they are not fatal */
- mq_sysctl_table = register_sysctl_table(mq_sysctl_root, 0);
+ mq_sysctl_table = register_sysctl_table(mq_sysctl_root);
error = register_filesystem(&mqueue_fs_type);
if (error)