xfs: return inode fork offset in bulkstat for fsr
PATCH 1/1 xfs: return inode fork offset in bulkstat for fsr
From: Dave Chinner <[email protected]>
So that fsr can attempt to get the fork offset of the temporary inode it uses the same as the inode it is defragmenting, pass the fork offset out in the bulkstat information.
The bulkstat structure has padding that has always been zeroed, so userspace can tell if this field is set or not by use of the xattr present flag and a non-zero value for the fork offset.
--- fs/xfs/xfs_fs.h | 3 ++- fs/xfs/xfs_itable.c | 2 ++ 2 files changed, 4 insertions(+), 1 deletions(-)
fs/xfs/xfs_fs.h +2 -1
@@ -292,7 +292,8 @@ typedef struct xfs_bstat {__s32 bs_extents;/* number of extents */ __u32 bs_gen;/* generation count */ __u16 bs_projid;/* project id */ -unsigned char bs_pad[14 ];/* pad space, unused */ +__u16 bs_forkoff;/* inode fork offset in bytes */ +unsigned char bs_pad[12 ];/* pad space, unused */ __u32 bs_dmevmask;/* DMIG event mask */ __u16 bs_dmstate;/* DMIG state info */ __u16 bs_aextents;/* attribute number of extents */
fs/xfs/xfs_itable.c +2 -0
@@ -106,6 +106,7 @@ xfs_bulkstat_one_iget( buf->bs_dmevmask = dic->di_dmevmask; buf->bs_dmstate = dic->di_dmstate; buf->bs_aextents = dic->di_anextents; + buf->bs_forkoff =XFS_IFORK_BOFF (ip);switch (dic->di_format) {case XFS_DINODE_FMT_DEV :
@@ -176,6 +177,7 @@ xfs_bulkstat_one_dinode( buf->bs_dmevmask =be32_to_cpu (dic->di_dmevmask); buf->bs_dmstate =be16_to_cpu (dic->di_dmstate); buf->bs_aextents =be16_to_cpu (dic->di_anextents); + buf->bs_forkoff =XFS_DFORK_BOFF (dic);switch (dic->di_format) {case XFS_DINODE_FMT_DEV :
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Quoted 9 lines · Dave Chinner
From: Dave Chinner <[email protected]>
So that fsr can attempt to get the fork offset of the temporary inode it uses the same as the inode it is defragmenting, pass the fork offset out in the bulkstat information.
The bulkstat structure has padding that has always been zeroed, so userspace can tell if this field is set or not by use of the xattr present flag and a non-zero value for the fork offset.
Looks good,
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