From d2bb140e99e6710c1b46e38a6347ada364aadfc6 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 21 Jun 2016 09:54:53 +1000 Subject: [PATCH] xfs: use iomap fiemap implementation Note that this removes support for the untested FIEMAP_FLAG_XATTR. It could be added relatively easily with iomap ops for the attr fork, but without test coverage I don't feel safe doing this. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/xfs_iops.c | 80 +++-------------------------------------------- 1 file changed, 5 insertions(+), 75 deletions(-) diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 5d1fdae4e39b..985a263c6144 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -44,7 +44,7 @@ #include #include #include -#include +#include #include /* @@ -1004,51 +1004,6 @@ xfs_vn_update_time( return xfs_trans_commit(tp); } -#define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) - -/* - * Call fiemap helper to fill in user data. - * Returns positive errors to xfs_getbmap. - */ -STATIC int -xfs_fiemap_format( - void **arg, - struct getbmapx *bmv, - int *full) -{ - int error; - struct fiemap_extent_info *fieinfo = *arg; - u32 fiemap_flags = 0; - u64 logical, physical, length; - - /* Do nothing for a hole */ - if (bmv->bmv_block == -1LL) - return 0; - - logical = BBTOB(bmv->bmv_offset); - physical = BBTOB(bmv->bmv_block); - length = BBTOB(bmv->bmv_length); - - if (bmv->bmv_oflags & BMV_OF_PREALLOC) - fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; - else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { - fiemap_flags |= (FIEMAP_EXTENT_DELALLOC | - FIEMAP_EXTENT_UNKNOWN); - physical = 0; /* no block yet */ - } - if (bmv->bmv_oflags & BMV_OF_LAST) - fiemap_flags |= FIEMAP_EXTENT_LAST; - - error = fiemap_fill_next_extent(fieinfo, logical, physical, - length, fiemap_flags); - if (error > 0) { - error = 0; - *full = 1; /* user array now full */ - } - - return error; -} - STATIC int xfs_vn_fiemap( struct inode *inode, @@ -1056,38 +1011,13 @@ xfs_vn_fiemap( u64 start, u64 length) { - xfs_inode_t *ip = XFS_I(inode); - struct getbmapx bm; int error; - error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); - if (error) - return error; - - /* Set up bmap header for xfs internal routine */ - bm.bmv_offset = BTOBBT(start); - /* Special case for whole file */ - if (length == FIEMAP_MAX_OFFSET) - bm.bmv_length = -1LL; - else - bm.bmv_length = BTOBB(start + length) - bm.bmv_offset; - - /* We add one because in getbmap world count includes the header */ - bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : - fieinfo->fi_extents_max + 1; - bm.bmv_count = min_t(__s32, bm.bmv_count, - (PAGE_SIZE * 16 / sizeof(struct getbmapx))); - bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; - if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) - bm.bmv_iflags |= BMV_IF_ATTRFORK; - if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) - bm.bmv_iflags |= BMV_IF_DELALLOC; - - error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); - if (error) - return error; + xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); + error = iomap_fiemap(inode, fieinfo, start, length, &xfs_iomap_ops); + xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); - return 0; + return error; } STATIC int -- 2.20.1