diff options
| -rw-r--r-- | fs/fuse/file.c | 3 | ||||
| -rw-r--r-- | mm/filemap.c | 42 |
2 files changed, 23 insertions, 22 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 7e70506..89fdfd1 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -2710,6 +2710,9 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, inode = file->f_mapping->host; i_size = i_size_read(inode); + if ((rw == READ) && (offset > i_size)) + return 0; + /* optimization for short read */ if (async_dio && rw != WRITE && offset + count > i_size) { if (offset >= i_size) diff --git a/mm/filemap.c b/mm/filemap.c index b7749a9..0184286 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1428,30 +1428,28 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov, if (!count) goto out; /* skip atime */ size = i_size_read(inode); - if (pos < size) { - retval = filemap_write_and_wait_range(mapping, pos, + retval = filemap_write_and_wait_range(mapping, pos, pos + iov_length(iov, nr_segs) - 1); - if (!retval) { - retval = mapping->a_ops->direct_IO(READ, iocb, - iov, pos, nr_segs); - } - if (retval > 0) { - *ppos = pos + retval; - count -= retval; - } + if (!retval) { + retval = mapping->a_ops->direct_IO(READ, iocb, + iov, pos, nr_segs); + } + if (retval > 0) { + *ppos = pos + retval; + count -= retval; + } - /* - * Btrfs can have a short DIO read if we encounter - * compressed extents, so if there was an error, or if - * we've already read everything we wanted to, or if - * there was a short read because we hit EOF, go ahead - * and return. Otherwise fallthrough to buffered io for - * the rest of the read. - */ - if (retval < 0 || !count || *ppos >= size) { - file_accessed(filp); - goto out; - } + /* + * Btrfs can have a short DIO read if we encounter + * compressed extents, so if there was an error, or if + * we've already read everything we wanted to, or if + * there was a short read because we hit EOF, go ahead + * and return. Otherwise fallthrough to buffered io for + * the rest of the read. + */ + if (retval < 0 || !count || *ppos >= size) { + file_accessed(filp); + goto out; } } |
