From 40670d18e878160a170ba135c5d077471d7a9998 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 10 Aug 2021 18:33:11 -0700 Subject: iomap: switch iomap_seek_hole to use iomap_iter Rewrite iomap_seek_hole to use iomap_iter. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/iomap/seek.c | 51 ++++++++++++++++++++++++++------------------------- 1 file changed, 26 insertions(+), 25 deletions(-) diff --git a/fs/iomap/seek.c b/fs/iomap/seek.c index ce6fb810854f..fed8f9005f9e 100644 --- a/fs/iomap/seek.c +++ b/fs/iomap/seek.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2017 Red Hat, Inc. - * Copyright (c) 2018 Christoph Hellwig. + * Copyright (c) 2018-2021 Christoph Hellwig. */ #include #include @@ -10,21 +10,20 @@ #include #include -static loff_t -iomap_seek_hole_actor(struct inode *inode, loff_t start, loff_t length, - void *data, struct iomap *iomap, struct iomap *srcmap) +static loff_t iomap_seek_hole_iter(const struct iomap_iter *iter, + loff_t *hole_pos) { - loff_t offset = start; + loff_t length = iomap_length(iter); - switch (iomap->type) { + switch (iter->iomap.type) { case IOMAP_UNWRITTEN: - offset = mapping_seek_hole_data(inode->i_mapping, start, - start + length, SEEK_HOLE); - if (offset == start + length) + *hole_pos = mapping_seek_hole_data(iter->inode->i_mapping, + iter->pos, iter->pos + length, SEEK_HOLE); + if (*hole_pos == iter->pos + length) return length; - fallthrough; + return 0; case IOMAP_HOLE: - *(loff_t *)data = offset; + *hole_pos = iter->pos; return 0; default: return length; @@ -32,26 +31,28 @@ iomap_seek_hole_actor(struct inode *inode, loff_t start, loff_t length, } loff_t -iomap_seek_hole(struct inode *inode, loff_t offset, const struct iomap_ops *ops) +iomap_seek_hole(struct inode *inode, loff_t pos, const struct iomap_ops *ops) { loff_t size = i_size_read(inode); - loff_t ret; + struct iomap_iter iter = { + .inode = inode, + .pos = pos, + .flags = IOMAP_REPORT, + }; + int ret; /* Nothing to be found before or beyond the end of the file. */ - if (offset < 0 || offset >= size) + if (pos < 0 || pos >= size) return -ENXIO; - while (offset < size) { - ret = iomap_apply(inode, offset, size - offset, IOMAP_REPORT, - ops, &offset, iomap_seek_hole_actor); - if (ret < 0) - return ret; - if (ret == 0) - break; - offset += ret; - } - - return offset; + iter.len = size - pos; + while ((ret = iomap_iter(&iter, ops)) > 0) + iter.processed = iomap_seek_hole_iter(&iter, &pos); + if (ret < 0) + return ret; + if (iter.len) /* found hole before EOF */ + return pos; + return size; } EXPORT_SYMBOL_GPL(iomap_seek_hole); -- cgit v1.2.3