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iomap: switch iomap_swapfile_activate to use iomap_iter

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Switch iomap_swapfile_activate to use iomap_iter.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Christoph Hellwig 2021-08-10 18:33:12 -07:00 committed by Darrick J. Wong
parent c4740bf1ed
commit 3d99a1ce38
1 changed files with 16 additions and 22 deletions
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38
fs/iomap/swapfile.c
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@ -88,13 +88,9 @@ static int iomap_swapfile_fail(struct iomap_swapfile_info *isi, const char *str)
* swap only cares about contiguous page-aligned physical extents and makes no
* distinction between written and unwritten extents.
*/
static loff_t iomap_swapfile_activate_actor(struct inode *inode, loff_t pos,
loff_t count, void *data, struct iomap *iomap,
struct iomap *srcmap)
static loff_t iomap_swapfile_iter(const struct iomap_iter *iter,
struct iomap *iomap, struct iomap_swapfile_info *isi)
{
struct iomap_swapfile_info *isi = data;
int error;
switch (iomap->type) {
case IOMAP_MAPPED:
case IOMAP_UNWRITTEN:
@ -125,12 +121,12 @@ static loff_t iomap_swapfile_activate_actor(struct inode *inode, loff_t pos,
isi->iomap.length += iomap->length;
} else {
/* Otherwise, add the retained iomap and store this one. */
error = iomap_swapfile_add_extent(isi);
int error = iomap_swapfile_add_extent(isi);
if (error)
return error;
memcpy(&isi->iomap, iomap, sizeof(isi->iomap));
}
return count;
return iomap_length(iter);
}
/*
@ -141,16 +137,19 @@ int iomap_swapfile_activate(struct swap_info_struct *sis,
struct file *swap_file, sector_t *pagespan,
const struct iomap_ops *ops)
{
struct inode *inode = swap_file->f_mapping->host;
struct iomap_iter iter = {
.inode = inode,
.pos = 0,
.len = ALIGN_DOWN(i_size_read(inode), PAGE_SIZE),
.flags = IOMAP_REPORT,
};
struct iomap_swapfile_info isi = {
.sis = sis,
.lowest_ppage = (sector_t)-1ULL,
.file = swap_file,
};
struct address_space *mapping = swap_file->f_mapping;
struct inode *inode = mapping->host;
loff_t pos = 0;
loff_t len = ALIGN_DOWN(i_size_read(inode), PAGE_SIZE);
loff_t ret;
int ret;
/*
* Persist all file mapping metadata so that we won't have any
@ -160,15 +159,10 @@ int iomap_swapfile_activate(struct swap_info_struct *sis,
if (ret)
return ret;
while (len > 0) {
ret = iomap_apply(inode, pos, len, IOMAP_REPORT,
ops, &isi, iomap_swapfile_activate_actor);
if (ret <= 0)
return ret;
pos += ret;
len -= ret;
}
while ((ret = iomap_iter(&iter, ops)) > 0)
iter.processed = iomap_swapfile_iter(&iter, &iter.iomap, &isi);
if (ret < 0)
return ret;
if (isi.iomap.length) {
ret = iomap_swapfile_add_extent(&isi);