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authorChristoph Hellwig <hch@lst.de>2021-07-20 15:33:40 +0200
committerJan Kara <jack@suse.cz>2021-07-27 11:00:36 +0200
commite0cba89d22b7041202c33e4d1ae4d2006d7e0190 (patch)
tree5e6a39ab9e312236bfc524a86e7843794783c4c4 /fs/hpfs
parent8b1e7076d26b935af7caec33dee2837c0ad7dbb5 (diff)
downloadlinux-e0cba89d22b7041202c33e4d1ae4d2006d7e0190.tar.bz2
hpfs: use iomap_fiemap to implement ->fiemap
hpfs is the last user of generic_block_fiemap, so add a trivial iomap_ops based on the ext2 version and switch to iomap_fiemap. Link: https://lore.kernel.org/r/20210720133341.405438-4-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/hpfs')
-rw-r--r--fs/hpfs/Kconfig1
-rw-r--r--fs/hpfs/file.c51
2 files changed, 51 insertions, 1 deletions
diff --git a/fs/hpfs/Kconfig b/fs/hpfs/Kconfig
index 2b36dc6f0a10..ec975f466877 100644
--- a/fs/hpfs/Kconfig
+++ b/fs/hpfs/Kconfig
@@ -2,6 +2,7 @@
config HPFS_FS
tristate "OS/2 HPFS file system support"
depends on BLOCK
+ select FS_IOMAP
help
OS/2 is IBM's operating system for PC's, the same as Warp, and HPFS
is the file system used for organizing files on OS/2 hard disk
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index c3a49aacf20a..fb37f57130aa 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -9,6 +9,7 @@
#include "hpfs_fn.h"
#include <linux/mpage.h>
+#include <linux/iomap.h>
#include <linux/fiemap.h>
#define BLOCKS(size) (((size) + 511) >> 9)
@@ -116,6 +117,47 @@ static int hpfs_get_block(struct inode *inode, sector_t iblock, struct buffer_he
return r;
}
+static int hpfs_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
+ unsigned flags, struct iomap *iomap, struct iomap *srcmap)
+{
+ struct super_block *sb = inode->i_sb;
+ unsigned int blkbits = inode->i_blkbits;
+ unsigned int n_secs;
+ secno s;
+
+ if (WARN_ON_ONCE(flags & (IOMAP_WRITE | IOMAP_ZERO)))
+ return -EINVAL;
+
+ iomap->bdev = inode->i_sb->s_bdev;
+ iomap->offset = offset;
+
+ hpfs_lock(sb);
+ s = hpfs_bmap(inode, offset >> blkbits, &n_secs);
+ if (s) {
+ n_secs = hpfs_search_hotfix_map_for_range(sb, s,
+ min_t(loff_t, n_secs, length));
+ if (unlikely(!n_secs)) {
+ s = hpfs_search_hotfix_map(sb, s);
+ n_secs = 1;
+ }
+ iomap->type = IOMAP_MAPPED;
+ iomap->flags = IOMAP_F_MERGED;
+ iomap->addr = (u64)s << blkbits;
+ iomap->length = (u64)n_secs << blkbits;
+ } else {
+ iomap->type = IOMAP_HOLE;
+ iomap->addr = IOMAP_NULL_ADDR;
+ iomap->length = 1 << blkbits;
+ }
+
+ hpfs_unlock(sb);
+ return 0;
+}
+
+static const struct iomap_ops hpfs_iomap_ops = {
+ .iomap_begin = hpfs_iomap_begin,
+};
+
static int hpfs_readpage(struct file *file, struct page *page)
{
return mpage_readpage(page, hpfs_get_block);
@@ -192,7 +234,14 @@ static sector_t _hpfs_bmap(struct address_space *mapping, sector_t block)
static int hpfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 start, u64 len)
{
- return generic_block_fiemap(inode, fieinfo, start, len, hpfs_get_block);
+ int ret;
+
+ inode_lock(inode);
+ len = min_t(u64, len, i_size_read(inode));
+ ret = iomap_fiemap(inode, fieinfo, start, len, &hpfs_iomap_ops);
+ inode_unlock(inode);
+
+ return ret;
}
const struct address_space_operations hpfs_aops = {