static int autofs_revalidate(struct dentry * dentry, struct nameidata *nd)
{
struct inode * dir;
struct autofs_sb_info *sbi;
struct autofs_dir_ent *ent;
int res;
lock_kernel();
dir = dentry->d_parent->d_inode;
sbi = autofs_sbi(dir->i_sb);
/* Pending dentry */
if (dentry->d_flags & DCACHE_AUTOFS_PENDING) {
if (autofs_oz_mode(sbi))
res = 1;
else
res = try_to_fill_dentry(dentry, dir->i_sb, sbi);
unlock_kernel();
return res;
}
/* Negative dentry.. invalidate if "old" */
if (!dentry->d_inode) {
unlock_kernel();
return (dentry->d_time - jiffies <= AUTOFS_NEGATIVE_TIMEOUT);
}
/* Check for a non-mountpoint directory */
if (S_ISDIR(dentry->d_inode->i_mode) && !d_mountpoint(dentry)) {
if (autofs_oz_mode(sbi))
res = 1;
else
res = try_to_fill_dentry(dentry, dir->i_sb, sbi);
unlock_kernel();
return res;
}
/* Update the usage list */
if (!autofs_oz_mode(sbi)) {
ent = (struct autofs_dir_ent *) dentry->d_time;
if (ent)
autofs_update_usage(&sbi->dirhash,ent);
}
unlock_kernel();
return 1;
}
/*
* Revalidate is called on every cache lookup. Some of those
* cache lookups may actually happen while the dentry is not
* yet completely filled in, and revalidate has to delay such
* lookups..
*/
static int autofs4_root_revalidate(struct dentry * dentry, int flags)
{
struct inode * dir = dentry->d_parent->d_inode;
struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
struct autofs_info *ino;
int oz_mode = autofs4_oz_mode(sbi);
/* Pending dentry */
if (autofs4_ispending(dentry)) {
if (autofs4_oz_mode(sbi))
return 1;
else
return try_to_fill_dentry(dentry, dir->i_sb, sbi);
}
/* Negative dentry.. invalidate if "old" */
if (dentry->d_inode == NULL)
return (dentry->d_time - jiffies <= AUTOFS_NEGATIVE_TIMEOUT);
ino = autofs4_dentry_ino(dentry);
/* Check for a non-mountpoint directory with no contents */
spin_lock(&dcache_lock);
if (S_ISDIR(dentry->d_inode->i_mode) &&
!d_mountpoint(dentry) &&
list_empty(&dentry->d_subdirs)) {
DPRINTK(("autofs_root_revalidate: dentry=%p %.*s, emptydir\n",
dentry, dentry->d_name.len, dentry->d_name.name));
spin_unlock(&dcache_lock);
if (oz_mode)
return 1;
else
return try_to_fill_dentry(dentry, dir->i_sb, sbi);
}
spin_unlock(&dcache_lock);
/* Update the usage list */
if (!oz_mode)
autofs4_update_usage(dentry);
return 1;
}