Btrfs: send, use the right limits for xattr names and values

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commit 7e3ae33efa upstream.

We were limiting the sum of the xattr name and value lengths to PATH_MAX,
which is not correct, specially on filesystems created with btrfs-progs
v3.12 or higher, where the default leaf size is max(16384, PAGE_SIZE), or
systems with page sizes larger than 4096 bytes.

Xattrs have their own specific maximum name and value lengths, which depend
on the leaf size, therefore use these limits to be able to send xattrs with
sizes larger than PATH_MAX.

A test case for xfstests follows.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Filipe Manana 2014-05-23 20:15:16 +01:00 • committed by Greg Kroah-Hartman

parent 1a7fc2e61a

commit 69a109b2ce

1 changed files with 23 additions and 7 deletions

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fs/btrfs/send.c

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