linux-toradex.git/fs/ecryptfs/inode.c, branch v3.15.6

vfs: add renameat2 syscall

2014-04-01T15:08:42+00:00

Add new renameat2 syscall, which is the same as renameat with an added
flags argument.

Pass flags to vfs_rename() and to i_op->rename() as well.

Signed-off-by: Miklos Szeredi 
Reviewed-by: J. Bruce Fields

ecryptfs: fix failure handling in ->readlink()

2014-01-25T08:13:00+00:00

If ecryptfs_readlink_lower() fails, buf remains an uninitialized
pointer and passing it nd_set_link() won't do anything good.

Fixed by switching ecryptfs_readlink_lower() to saner API - make it
return buf or ERR_PTR(...) and update callers.

Signed-off-by: Al Viro

locks: break delegations on any attribute modification

2013-11-09T05:16:44+00:00

NFSv4 uses leases to guarantee that clients can cache metadata as well
as data.

Cc: Mikulas Patocka 
Cc: David Howells 
Cc: Tyler Hicks 
Cc: Dustin Kirkland 
Acked-by: Jeff Layton 
Signed-off-by: J. Bruce Fields 
Signed-off-by: Al Viro

locks: break delegations on link

2013-11-09T05:16:43+00:00

Cc: Tyler Hicks 
Cc: Dustin Kirkland 
Acked-by: Jeff Layton 
Signed-off-by: J. Bruce Fields 
Signed-off-by: Al Viro

locks: break delegations on rename

2013-11-09T05:16:43+00:00

Cc: David Howells 
Acked-by: Jeff Layton 
Signed-off-by: J. Bruce Fields 
Signed-off-by: Al Viro

locks: break delegations on unlink

2013-11-09T05:16:42+00:00

We need to break delegations on any operation that changes the set of
links pointing to an inode.  Start with unlink.

Such operations also hold the i_mutex on a parent directory.  Breaking a
delegation may require waiting for a timeout (by default 90 seconds) in
the case of a unresponsive NFS client.  To avoid blocking all directory
operations, we therefore drop locks before waiting for the delegation.
The logic then looks like:

	acquire locks
	...
	test for delegation; if found:
		take reference on inode
		release locks
		wait for delegation break
		drop reference on inode
		retry

It is possible this could never terminate.  (Even if we take precautions
to prevent another delegation being acquired on the same inode, we could
get a different inode on each retry.)  But this seems very unlikely.

The initial test for a delegation happens after the lock on the target
inode is acquired, but the directory inode may have been acquired
further up the call stack.  We therefore add a "struct inode **"
argument to any intervening functions, which we use to pass the inode
back up to the caller in the case it needs a delegation synchronously
broken.

Cc: David Howells 
Cc: Tyler Hicks 
Cc: Dustin Kirkland 
Acked-by: Jeff Layton 
Signed-off-by: J. Bruce Fields 
Signed-off-by: Al Viro

new helper: kfree_put_link()

2013-10-25T03:34:49+00:00

duplicated to hell and back...

Signed-off-by: Al Viro

ecryptfs: get rid of ecryptfs_set_dentry_lower{,_mnt}

2013-10-25T03:34:48+00:00

Signed-off-by: Al Viro

helper for reading ->d_count

2013-07-05T14:59:33+00:00

Signed-off-by: Al Viro

ecryptfs: switch ecryptfs_decode_and_decrypt_filename() from dentry to sb

2013-06-29T08:57:25+00:00

Signed-off-by: Al Viro