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Commit aac1a55b authored by Bob Peterson's avatar Bob Peterson Committed by Andreas Gruenbacher
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GFS2: Switch fiemap implementation to use iomap 



This patch switches GFS2's implementation of fiemap from the old
block_map code to the new iomap interface.

Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
Signed-off-by: default avatarAndreas Gruenbacher <agruenba@redhat.com>
parent 3974320c

fs/gfs2/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ config GFS2_FS 
	select FS_POSIX_ACL

	select CRC32

	select QUOTACTL

	select FS_IOMAP

	help

	  A cluster filesystem.

fs/gfs2/inode.c

+9 −25
Original line number Diff line number Diff line
@@ -18,7 +18,7 @@ 
#include <linux/posix_acl.h>

#include <linux/gfs2_ondisk.h>

#include <linux/crc32.h>

#include <linux/fiemap.h>

#include <linux/iomap.h>

#include <linux/security.h>

#include <linux/uaccess.h>
@@ -2003,6 +2003,10 @@ static int gfs2_getattr(const struct path *path, struct kstat *stat, 
	return 0;

}



const struct iomap_ops gfs2_iomap_ops = {

	.iomap_begin = gfs2_iomap_begin,

};



static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,

		       u64 start, u64 len)

{
@@ -2010,38 +2014,18 @@ static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 
	struct gfs2_holder gh;

	int ret;



	ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);

	if (ret)

		return ret;



	inode_lock(inode);

	inode_lock_shared(inode);



	ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);

	if (ret)

		goto out;



	if (gfs2_is_stuffed(ip)) {

		u64 phys = ip->i_no_addr << inode->i_blkbits;

		u64 size = i_size_read(inode);

		u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|

			    FIEMAP_EXTENT_DATA_INLINE;

		phys += sizeof(struct gfs2_dinode);

		phys += start;

		if (start + len > size)

			len = size - start;

		if (start < size)

			ret = fiemap_fill_next_extent(fieinfo, start, phys,

						      len, flags);

		if (ret == 1)

			ret = 0;

	} else {

		ret = __generic_block_fiemap(inode, fieinfo, start, len,

					     gfs2_block_map);

	}

	ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops);



	gfs2_glock_dq_uninit(&gh);



out:

	inode_unlock(inode);

	inode_unlock_shared(inode);

	return ret;

}