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authorAndreas Gruenbacher <agruenba@redhat.com>2015-12-02 16:44:43 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2015-12-14 03:46:12 +0300
commit764a5c6b1fa4306dd7573c1d80914254909cd036 (patch)
tree6e5ceb636c3b53cdc0994cf8c2415656e2b12e82 /fs/xattr.c
parent1046cb119521b5e1881f380dc99729fc84c96661 (diff)
downloadlinux-764a5c6b1fa4306dd7573c1d80914254909cd036.tar.xz
xattr handlers: Simplify list operation
Change the list operation to only return whether or not an attribute should be listed. Copying the attribute names into the buffer is moved to the callers. Since the result only depends on the dentry and not on the attribute name, we do not pass the attribute name to list operations. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/xattr.c')
-rw-r--r--fs/xattr.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/fs/xattr.c b/fs/xattr.c
index 2c7776403aba..d7f5037a17b5 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -723,23 +723,25 @@ generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
if (!buffer) {
for_each_xattr_handler(handlers, handler) {
- if (!handler->list)
+ if (!handler->name ||
+ (handler->list && !handler->list(dentry)))
continue;
- size += handler->list(handler, dentry, NULL, 0,
- NULL, 0);
+ size += strlen(handler->name) + 1;
}
} else {
char *buf = buffer;
+ size_t len;
for_each_xattr_handler(handlers, handler) {
- if (!handler->list)
+ if (!handler->name ||
+ (handler->list && !handler->list(dentry)))
continue;
- size = handler->list(handler, dentry, buf, buffer_size,
- NULL, 0);
- if (size > buffer_size)
+ len = strlen(handler->name);
+ if (len + 1 > buffer_size)
return -ERANGE;
- buf += size;
- buffer_size -= size;
+ memcpy(buf, handler->name, len + 1);
+ buf += len + 1;
+ buffer_size -= len + 1;
}
size = buf - buffer;
}