xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Garpu 0
Kode Masalah Tarik Permintaan Actions Packages Projects Rilis Wiki Kegiatan

xfs: implement extended feature masks

Telusuri Sumber 
The version 5 superblock has extended feature masks for compatible,
incompatible and read-only compatible feature sets. Implement the
masking and mount-time checking for these feature masks.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner
2013-04-03 16:11:32 +11:00
committed by Ben Myers
orang tua 04a1e6c5b2
melakukan e721f504cf
3 mengubah file dengan 129 tambahan dan 8 penghapusan
Download Patch File Download Diff File Expand all files Collapse all files

70
fs/xfs/xfs_sb.h
Melihat File

@@ -168,8 +168,10 @@ typedef struct xfs_sb {
__uint32_t sb_features_compat;
__uint32_t sb_features_ro_compat;
__uint32_t sb_features_incompat;
__uint32_t sb_features_log_incompat;
__uint32_t sb_crc; /* superblock crc */
__uint32_t sb_pad;
xfs_ino_t sb_pquotino; /* project quota inode */
xfs_lsn_t sb_lsn; /* last write sequence */
@@ -250,8 +252,10 @@ typedef struct xfs_dsb {
__be32 sb_features_compat;
__be32 sb_features_ro_compat;
__be32 sb_features_incompat;
__be32 sb_features_log_incompat;
__le32 sb_crc; /* superblock crc */
__be32 sb_pad;
__be64 sb_pquotino; /* project quota inode */
__be64 sb_lsn; /* last write sequence */
@@ -276,7 +280,8 @@ typedef enum {
XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
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_CRC,
XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT,
XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD,
XFS_SBS_PQUOTINO, XFS_SBS_LSN,
XFS_SBS_FIELDCOUNT
} xfs_sb_field_t;
@@ -306,6 +311,7 @@ typedef enum {
#define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT)
#define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
#define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
#define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
#define XFS_SB_CRC XFS_SB_MVAL(CRC)
#define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO)
#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
@@ -316,7 +322,8 @@ typedef enum {
XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | XFS_SB_PQUOTINO)
XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
/*
@@ -552,6 +559,65 @@ static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
}
/*
* Extended v5 superblock feature masks. These are to be used for new v5
* superblock features only.
*
* Compat features are new features that old kernels will not notice or affect
* and so can mount read-write without issues.
*
* RO-Compat (read only) are features that old kernels can read but will break
* if they write. Hence only read-only mounts of such filesystems are allowed on
* kernels that don't support the feature bit.
*
* InCompat features are features which old kernels will not understand and so
* must not mount.
*
* Log-InCompat features are for changes to log formats or new transactions that
* can't be replayed on older kernels. The fields are set when the filesystem is
* mounted, and a clean unmount clears the fields.
*/
#define XFS_SB_FEAT_COMPAT_ALL 0
#define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL
static inline bool
xfs_sb_has_compat_feature(
struct xfs_sb *sbp,
__uint32_t feature)
{
return (sbp->sb_features_compat & feature) != 0;
}
#define XFS_SB_FEAT_RO_COMPAT_ALL 0
#define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
static inline bool
xfs_sb_has_ro_compat_feature(
struct xfs_sb *sbp,
__uint32_t feature)
{
return (sbp->sb_features_ro_compat & feature) != 0;
}
#define XFS_SB_FEAT_INCOMPAT_ALL 0
#define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL
static inline bool
xfs_sb_has_incompat_feature(
struct xfs_sb *sbp,
__uint32_t feature)
{
return (sbp->sb_features_incompat & feature) != 0;
}
#define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
#define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
static inline bool
xfs_sb_has_incompat_log_feature(
struct xfs_sb *sbp,
__uint32_t feature)
{
return (sbp->sb_features_log_incompat & feature) != 0;
}
/*
* end of superblock version macros
*/