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[PATCH] autofs4: follow_link missing functionality

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This functionality is also need for operation of autofs v5 direct mounts.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ian Kent 2006-03-27 01:14:58 -08:00 committed by Linus Torvalds
parent 3370c74b2e
commit 871f94344c
2 changed files with 44 additions and 10 deletions
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4
fs/autofs4/expire.c
View file

@ -113,10 +113,6 @@ static int autofs4_direct_busy(struct vfsmount *mnt,
DPRINTK("top %p %.*s",
top, (int) top->d_name.len, top->d_name.name);
/* Not a mountpoint - give up */
if (!d_mountpoint(top))
return 1;
/* If it's busy update the expiry counters */
if (!may_umount_tree(mnt)) {
struct autofs_info *ino = autofs4_dentry_ino(top);

50
fs/autofs4/root.c
View file

@ -57,6 +57,9 @@ struct inode_operations autofs4_indirect_root_inode_operations = {
struct inode_operations autofs4_direct_root_inode_operations = {
.lookup = autofs4_lookup,
.unlink = autofs4_dir_unlink,
.mkdir = autofs4_dir_mkdir,
.rmdir = autofs4_dir_rmdir,
.follow_link = autofs4_follow_link,
};
@ -337,15 +340,50 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
if (oz_mode || !lookup_type)
goto done;
status = try_to_fill_dentry(dentry, 0);
if (status)
goto out_error;
/*
* If a request is pending wait for it.
* If it's a mount then it won't be expired till at least
* a liitle later and if it's an expire then we might need
* to mount it again.
*/
if (autofs4_ispending(dentry)) {
DPRINTK("waiting for active request %p name=%.*s",
dentry, dentry->d_name.len, dentry->d_name.name);
if (!autofs4_follow_mount(&nd->mnt, &nd->dentry)) {
status = -ENOENT;
goto out_error;
status = autofs4_wait(sbi, dentry, NFY_NONE);
DPRINTK("request done status=%d", status);
}
/*
* If the dentry contains directories then it is an
* autofs multi-mount with no root mount offset. So
* don't try to mount it again.
*/
spin_lock(&dcache_lock);
if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
spin_unlock(&dcache_lock);
status = try_to_fill_dentry(dentry, 0);
if (status)
goto out_error;
/*
* The mount succeeded but if there is no root mount
* it must be an autofs multi-mount with no root offset
* so we don't need to follow the mount.
*/
if (d_mountpoint(dentry)) {
if (!autofs4_follow_mount(&nd->mnt, &nd->dentry)) {
status = -ENOENT;
goto out_error;
}
}
goto done;
}
spin_unlock(&dcache_lock);
done:
return NULL;