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[AFS]: Add "directory write" support.

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Add support for the create, link, symlink, unlink, mkdir, rmdir and
rename VFS operations to the in-kernel AFS filesystem.

Also:

 (1) Fix dentry and inode revalidation.  d_revalidate should only look at
     state of the dentry.  Revalidation of the contents of an inode pointed to
     by a dentry is now separate.

 (2) Fix afs_lookup() to hash negative dentries as well as positive ones.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Howells
2007-04-26 15:59:35 -07:00
committed by David S. Miller
parent c35eccb1f6
commit 260a980317
14 changed files with 1779 additions and 269 deletions
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31
fs/afs/security.c
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@ -92,7 +92,7 @@ static struct afs_vnode *afs_get_auth_inode(struct afs_vnode *vnode,
ASSERT(auth_inode != NULL);
} else {
auth_inode = afs_iget(vnode->vfs_inode.i_sb, key,
&vnode->status.parent);
&vnode->status.parent, NULL, NULL);
if (IS_ERR(auth_inode))
return ERR_PTR(PTR_ERR(auth_inode));
}
@ -288,7 +288,8 @@ int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
struct key *key;
int ret;
_enter("{%x:%x},%x,", vnode->fid.vid, vnode->fid.vnode, mask);
_enter("{{%x:%x},%lx},%x,",
vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask);
key = afs_request_key(vnode->volume->cell);
if (IS_ERR(key)) {
@ -296,13 +297,19 @@ int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
return PTR_ERR(key);
}
/* if the promise has expired, we need to check the server again */
if (!vnode->cb_promised) {
_debug("not promised");
ret = afs_vnode_fetch_status(vnode, NULL, key);
if (ret < 0)
goto error;
_debug("new promise [fl=%lx]", vnode->flags);
}
/* check the permits to see if we've got one yet */
ret = afs_check_permit(vnode, key, &access);
if (ret < 0) {
key_put(key);
_leave(" = %d [check]", ret);
return ret;
}
if (ret < 0)
goto error;
/* interpret the access mask */
_debug("REQ %x ACC %x on %s",
@ -336,10 +343,14 @@ int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
}
key_put(key);
return generic_permission(inode, mask, NULL);
ret = generic_permission(inode, mask, NULL);
_leave(" = %d", ret);
return ret;
permission_denied:
ret = -EACCES;
error:
key_put(key);
_leave(" = -EACCES");
return -EACCES;
_leave(" = %d", ret);
return ret;
}