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Commit 2a0b4f64 authored by David Howells's avatar David Howells
Browse files

afs: Don't invoke the server to read data beyond EOF 



When writing a new page, clear space in the page rather than attempting to
load it from the server if the space is beyond the EOF.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent f51375cd

fs/afs/write.c

+11 −0
Original line number Diff line number Diff line
@@ -33,10 +33,21 @@ static int afs_fill_page(struct afs_vnode *vnode, struct key *key, 
			 loff_t pos, unsigned int len, struct page *page)

{

	struct afs_read *req;

	size_t p;

	void *data;

	int ret;



	_enter(",,%llu", (unsigned long long)pos);



	if (pos >= vnode->vfs_inode.i_size) {

		p = pos & ~PAGE_MASK;

		ASSERTCMP(p + len, <=, PAGE_SIZE);

		data = kmap(page);

		memset(data + p, 0, len);

		kunmap(page);

		return 0;

	}



	req = kzalloc(sizeof(struct afs_read) + sizeof(struct page *),

		      GFP_KERNEL);

	if (!req)