[PATCH v2 01/17] xfs: add sparse inode chunk alignment superblock field

[Brian Foster <bfoster@xxxxxxxxxx>]

Add sb_spinoalignmt to the superblock to specify sparse inode chunk
alignment. This also currently represents the minimum allowable sparse
chunk allocation size.

Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_sb.c | 4 ++--
 fs/xfs/libxfs/xfs_sb.h | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 5f902fa..6677180 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -99,7 +99,7 @@ static const struct {
        { offsetof(xfs_sb_t, sb_features_incompat),     0 },
        { offsetof(xfs_sb_t, sb_features_log_incompat), 0 },
        { offsetof(xfs_sb_t, sb_crc),           0 },
-       { offsetof(xfs_sb_t, sb_pad),           0 },
+       { offsetof(xfs_sb_t, sb_spinoalignmt),  0 },
        { offsetof(xfs_sb_t, sb_pquotino),      0 },
        { offsetof(xfs_sb_t, sb_lsn),           0 },
        { sizeof(xfs_sb_t),                     0 }
@@ -447,7 +447,7 @@ __xfs_sb_from_disk(
                                be32_to_cpu(from->sb_features_log_incompat);
        /* crc is only used on disk, not in memory; just init to 0 here. */
        to->sb_crc = 0;
-       to->sb_pad = 0;
+       to->sb_spinoalignmt = be32_to_cpu(from->sb_spinoalignmt);
        to->sb_pquotino = be64_to_cpu(from->sb_pquotino);
        to->sb_lsn = be64_to_cpu(from->sb_lsn);
        /* Convert on-disk flags to in-memory flags? */
diff --git a/fs/xfs/libxfs/xfs_sb.h b/fs/xfs/libxfs/xfs_sb.h
index 2e73970..4e5aaa8 100644
--- a/fs/xfs/libxfs/xfs_sb.h
+++ b/fs/xfs/libxfs/xfs_sb.h
@@ -157,7 +157,7 @@ typedef struct xfs_sb {
        __uint32_t      sb_features_log_incompat;
 
        __uint32_t      sb_crc;         /* superblock crc */
-       __uint32_t      sb_pad;
+       xfs_extlen_t    sb_spinoalignmt;/* sparse inode chunk alignment */
 
        xfs_ino_t       sb_pquotino;    /* project quota inode */
        xfs_lsn_t       sb_lsn;         /* last write sequence */
@@ -243,7 +243,7 @@ typedef struct xfs_dsb {
        __be32          sb_features_log_incompat;
 
        __le32          sb_crc;         /* superblock crc */
-       __be32          sb_pad;
+       __be32          sb_spinoalignmt;/* sparse inode chunk alignment */
 
        __be64          sb_pquotino;    /* project quota inode */
        __be64          sb_lsn;         /* last write sequence */
@@ -269,7 +269,7 @@ typedef enum {
        XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
        XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT,
        XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT,
-       XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD,
+       XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_SPINOALIGNMT,
        XFS_SBS_PQUOTINO, XFS_SBS_LSN,
        XFS_SBS_FIELDCOUNT
 } xfs_sb_field_t;
-- 
1.8.3.1