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[PATCH] fix handling of st_nlink on procfs root 

1) it should use nr_processes(), not nr_threads; otherwise we are getting
very confused find(1) and friends, among other things.
2) better do that at stat() time than at every damn lookup in procfs root.

Patch had been sitting in FC4 kernels for many months now...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2006-02-08 14:37:40 -05:00
parent e30809fde5
commit 76b6159ba0
2 changed files with 9 additions and 12 deletions
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4
fs/proc/inode.c
View File

@ -204,10 +204,6 @@ int proc_fill_super(struct super_block *s, void *data, int silent)
root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
if (!root_inode)
goto out_no_root;
/*
* Fixup the root inode's nlink value
*/
root_inode->i_nlink += nr_processes();
root_inode->i_uid = 0;
root_inode->i_gid = 0;
s->s_root = d_alloc_root(root_inode);

17
fs/proc/root.c
View File

@ -80,16 +80,16 @@ void __init proc_root_init(void)
proc_bus = proc_mkdir("bus", NULL);
}
static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat
)
{
generic_fillattr(dentry->d_inode, stat);
stat->nlink = proc_root.nlink + nr_processes();
return 0;
}
static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
{
/*
* nr_threads is actually protected by the tasklist_lock;
* however, it's conventional to do reads, especially for
* reporting, without any locking whatsoever.
*/
if (dir->i_ino == PROC_ROOT_INO) /* check for safety... */
dir->i_nlink = proc_root.nlink + nr_threads;
if (!proc_lookup(dir, dentry, nd)) {
return NULL;
}
@ -134,6 +134,7 @@ static struct file_operations proc_root_operations = {
*/
static struct inode_operations proc_root_inode_operations = {
.lookup = proc_root_lookup,
.getattr = proc_root_getattr,
};
/*