[PATCH v3 01/18] xfs: add sparse inode chunk alignment superblock field

Brian Foster
2015-02-06T19:53:11Z

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@redhat.com>
---
fs/xfs/libxfs/xfs_format.h | 6 +++---
fs/xfs/libxfs/xfs_sb.c | 4 ++--
2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 8eb7189..051c24d 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -170,7 +170,7 @@ 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 */
@@ -256,7 +256,7 @@ 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 */
@@ -282,7 +282,7 @@ 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;
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index b0a5fe9..eb22b5f 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -382,7 +382,7 @@ __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? */
@@ -524,7 +524,7 @@ xfs_sb_to_disk(
cpu_to_be32(from->sb_features_incompat);
to->sb_features_log_incompat =
cpu_to_be32(from->sb_features_log_incompat);
- to->sb_pad = 0;
+ to->sb_spinoalignmt = cpu_to_be32(from->sb_spinoalignmt);
to->sb_lsn = cpu_to_be64(from->sb_lsn);
}
}
--
1.8.3.1