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locks: break delegations on any attribute modification

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

Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: David Howells <dhowells@redhat.com>
Cc: Tyler Hicks <tyhicks@canonical.com>
Cc: Dustin Kirkland <dustin.kirkland@gazzang.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
J. Bruce Fields 2011-09-20 17:19:26 -04:00 • committed by Al Viro
parent 146a8595c6
commit 27ac0ffeac
10 changed files with 69 additions and 17 deletions
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4
fs/cachefiles/interface.c
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@ -449,14 +449,14 @@ static int cachefiles_attr_changed(struct fscache_object *_object)
_debug("discard tail %llx", oi_size);
newattrs.ia_valid = ATTR_SIZE;
newattrs.ia_size = oi_size & PAGE_MASK;
ret = notify_change(object->backer, &newattrs);
ret = notify_change(object->backer, &newattrs, NULL);
if (ret < 0)
goto truncate_failed;
}
newattrs.ia_valid = ATTR_SIZE;
newattrs.ia_size = ni_size;
ret = notify_change(object->backer, &newattrs);
ret = notify_change(object->backer, &newattrs, NULL);
truncate_failed:
mutex_unlock(&object->backer->d_inode->i_mutex);