Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6-omap-h63xx.git] / fs / proc / base.c

diff --git a/fs/proc/base.c b/fs/proc/base.c
index c742be48348f9c211969ca09153b43b5471b8138..770de444eba0b1cea185284f9b2f1760c7ddab30 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -153,7 +153,7 @@ static int get_nr_threads(struct task_struct *tsk)
        return count;
 }
 
-static int proc_cwd_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+static int proc_cwd_link(struct inode *inode, struct path *path)
 {
        struct task_struct *task = get_proc_task(inode);
        struct fs_struct *fs = NULL;
@@ -165,8 +165,8 @@ static int proc_cwd_link(struct inode *inode, struct dentry **dentry, struct vfs
        }
        if (fs) {
                read_lock(&fs->lock);
-               *mnt = mntget(fs->pwdmnt);
-               *dentry = dget(fs->pwd);
+               *path = fs->pwd;
+               path_get(&fs->pwd);
                read_unlock(&fs->lock);
                result = 0;
                put_fs_struct(fs);
@@ -174,7 +174,7 @@ static int proc_cwd_link(struct inode *inode, struct dentry **dentry, struct vfs
        return result;
 }
 
-static int proc_root_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+static int proc_root_link(struct inode *inode, struct path *path)
 {
        struct task_struct *task = get_proc_task(inode);
        struct fs_struct *fs = NULL;
@@ -186,8 +186,8 @@ static int proc_root_link(struct inode *inode, struct dentry **dentry, struct vf
        }
        if (fs) {
                read_lock(&fs->lock);
-               *mnt = mntget(fs->rootmnt);
-               *dentry = dget(fs->root);
+               *path = fs->root;
+               path_get(&fs->root);
                read_unlock(&fs->lock);
                result = 0;
                put_fs_struct(fs);
@@ -314,9 +314,12 @@ static int proc_pid_schedstat(struct task_struct *task, char *buffer)
 static int lstats_show_proc(struct seq_file *m, void *v)
 {
        int i;
-       struct task_struct *task = m->private;
-       seq_puts(m, "Latency Top version : v0.1\n");
+       struct inode *inode = m->private;
+       struct task_struct *task = get_proc_task(inode);
 
+       if (!task)
+               return -ESRCH;
+       seq_puts(m, "Latency Top version : v0.1\n");
        for (i = 0; i < 32; i++) {
                if (task->latency_record[i].backtrace[0]) {
                        int q;
@@ -341,32 +344,24 @@ static int lstats_show_proc(struct seq_file *m, void *v)
                }
 
        }
+       put_task_struct(task);
        return 0;
 }
 
 static int lstats_open(struct inode *inode, struct file *file)
 {
-       int ret;
-       struct seq_file *m;
-       struct task_struct *task = get_proc_task(inode);
-
-       ret = single_open(file, lstats_show_proc, NULL);
-       if (!ret) {
-               m = file->private_data;
-               m->private = task;
-       }
-       return ret;
+       return single_open(file, lstats_show_proc, inode);
 }
 
 static ssize_t lstats_write(struct file *file, const char __user *buf,
                            size_t count, loff_t *offs)
 {
-       struct seq_file *m;
-       struct task_struct *task;
+       struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
 
-       m = file->private_data;
-       task = m->private;
+       if (!task)
+               return -ESRCH;
        clear_all_latency_tracing(task);
+       put_task_struct(task);
 
        return count;
 }
@@ -416,6 +411,7 @@ static const struct limit_names lnames[RLIM_NLIMITS] = {
        [RLIMIT_MSGQUEUE] = {"Max msgqueue size", "bytes"},
        [RLIMIT_NICE] = {"Max nice priority", NULL},
        [RLIMIT_RTPRIO] = {"Max realtime priority", NULL},
+       [RLIMIT_RTTIME] = {"Max realtime timeout", "us"},
 };
 
 /* Display limits for a process */
@@ -1170,34 +1166,30 @@ static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
        if (!proc_fd_access_allowed(inode))
                goto out;
 
-       error = PROC_I(inode)->op.proc_get_link(inode, &nd->path.dentry,
-                                               &nd->path.mnt);
+       error = PROC_I(inode)->op.proc_get_link(inode, &nd->path);
        nd->last_type = LAST_BIND;
 out:
        return ERR_PTR(error);
 }
 
-static int do_proc_readlink(struct dentry *dentry, struct vfsmount *mnt,
-                           char __user *buffer, int buflen)
+static int do_proc_readlink(struct path *path, char __user *buffer, int buflen)
 {
-       struct inode * inode;
        char *tmp = (char*)__get_free_page(GFP_TEMPORARY);
-       char *path;
+       char *pathname;
        int len;
 
        if (!tmp)
                return -ENOMEM;
 
-       inode = dentry->d_inode;
-       path = d_path(dentry, mnt, tmp, PAGE_SIZE);
-       len = PTR_ERR(path);
-       if (IS_ERR(path))
+       pathname = d_path(path, tmp, PAGE_SIZE);
+       len = PTR_ERR(pathname);
+       if (IS_ERR(pathname))
                goto out;
-       len = tmp + PAGE_SIZE - 1 - path;
+       len = tmp + PAGE_SIZE - 1 - pathname;
 
        if (len > buflen)
                len = buflen;
-       if (copy_to_user(buffer, path, len))
+       if (copy_to_user(buffer, pathname, len))
                len = -EFAULT;
  out:
        free_page((unsigned long)tmp);
@@ -1208,20 +1200,18 @@ static int proc_pid_readlink(struct dentry * dentry, char __user * buffer, int b
 {
        int error = -EACCES;
        struct inode *inode = dentry->d_inode;
-       struct dentry *de;
-       struct vfsmount *mnt = NULL;
+       struct path path;
 
        /* Are we allowed to snoop on the tasks file descriptors? */
        if (!proc_fd_access_allowed(inode))
                goto out;
 
-       error = PROC_I(inode)->op.proc_get_link(inode, &de, &mnt);
+       error = PROC_I(inode)->op.proc_get_link(inode, &path);
        if (error)
                goto out;
 
-       error = do_proc_readlink(de, mnt, buffer, buflen);
-       dput(de);
-       mntput(mnt);
+       error = do_proc_readlink(&path, buffer, buflen);
+       path_put(&path);
 out:
        return error;
 }
@@ -1448,8 +1438,7 @@ out:
 
 #define PROC_FDINFO_MAX 64
 
-static int proc_fd_info(struct inode *inode, struct dentry **dentry,
-                       struct vfsmount **mnt, char *info)
+static int proc_fd_info(struct inode *inode, struct path *path, char *info)
 {
        struct task_struct *task = get_proc_task(inode);
        struct files_struct *files = NULL;
@@ -1468,10 +1457,10 @@ static int proc_fd_info(struct inode *inode, struct dentry **dentry,
                spin_lock(&files->file_lock);
                file = fcheck_files(files, fd);
                if (file) {
-                       if (mnt)
-                               *mnt = mntget(file->f_path.mnt);
-                       if (dentry)
-                               *dentry = dget(file->f_path.dentry);
+                       if (path) {
+                               *path = file->f_path;
+                               path_get(&file->f_path);
+                       }
                        if (info)
                                snprintf(info, PROC_FDINFO_MAX,
                                         "pos:\t%lli\n"
@@ -1488,10 +1477,9 @@ static int proc_fd_info(struct inode *inode, struct dentry **dentry,
        return -ENOENT;
 }
 
-static int proc_fd_link(struct inode *inode, struct dentry **dentry,
-                       struct vfsmount **mnt)
+static int proc_fd_link(struct inode *inode, struct path *path)
 {
-       return proc_fd_info(inode, dentry, mnt, NULL);
+       return proc_fd_info(inode, path, NULL);
 }
 
 static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
@@ -1685,7 +1673,7 @@ static ssize_t proc_fdinfo_read(struct file *file, char __user *buf,
                                      size_t len, loff_t *ppos)
 {
        char tmp[PROC_FDINFO_MAX];
-       int err = proc_fd_info(file->f_path.dentry->d_inode, NULL, NULL, tmp);
+       int err = proc_fd_info(file->f_path.dentry->d_inode, NULL, tmp);
        if (!err)
                err = simple_read_from_buffer(buf, len, ppos, tmp, strlen(tmp));
        return err;
@@ -2281,6 +2269,9 @@ static const struct pid_entry tgid_base_stuff[] = {
        DIR("task",       S_IRUGO|S_IXUGO, task),
        DIR("fd",         S_IRUSR|S_IXUSR, fd),
        DIR("fdinfo",     S_IRUSR|S_IXUSR, fdinfo),
+#ifdef CONFIG_NET
+       DIR("net",        S_IRUGO|S_IXUGO, net),
+#endif
        REG("environ",    S_IRUSR, environ),
        INF("auxv",       S_IRUSR, pid_auxv),
        ONE("status",     S_IRUGO, pid_status),