diff options
Diffstat (limited to 'fs/fuse/file.c')
| -rw-r--r-- | fs/fuse/file.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 592d7b48e42..c091a17d3ff 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -675,9 +675,26 @@ static void fuse_short_read(struct fuse_req *req, struct inode *inode, u64 attr_ver) { size_t num_read = req->out.args[0].size; + struct fuse_conn *fc = get_fuse_conn(inode); + + if (fc->writeback_cache) { + /* + * A hole in a file. Some data after the hole are in page cache, + * but have not reached the client fs yet. So, the hole is not + * present there. + */ + int i; + int start_idx = num_read >> PAGE_CACHE_SHIFT; + size_t off = num_read & (PAGE_CACHE_SIZE - 1); - loff_t pos = page_offset(req->pages[0]) + num_read; - fuse_read_update_size(inode, pos, attr_ver); + for (i = start_idx; i < req->num_pages; i++) { + zero_user_segment(req->pages[i], off, PAGE_CACHE_SIZE); + off = 0; + } + } else { + loff_t pos = page_offset(req->pages[0]) + num_read; + fuse_read_update_size(inode, pos, attr_ver); + } } static int fuse_readpage(struct file *file, struct page *page) |