diff options
| author | Chandan Babu R <chandan.babu@oracle.com> | 2022-03-08 09:34:28 +0000 |
|---|---|---|
| committer | Chandan Babu R <chandan.babu@oracle.com> | 2022-04-11 04:11:20 +0000 |
| commit | 52a4a14842ef940e5bab1c949e5adc8f027327dc (patch) | |
| tree | 48930332ce95f25798fc420f9b6c960cef0e93bd /fs/xfs/libxfs/xfs_format.h | |
| parent | 8314bca03a1aa94ad8e7551f13c5664968200e41 (diff) | |
xfs: Introduce per-inode 64-bit extent counters
This commit introduces new fields in the on-disk inode format to support
64-bit data fork extent counters and 32-bit attribute fork extent
counters. The new fields will be used only when an inode has
XFS_DIFLAG2_NREXT64 flag set. Otherwise we continue to use the regular 32-bit
data fork extent counters and 16-bit attribute fork extent counters.
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
Suggested-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_format.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_format.h | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index eb85bc9b229b..82b404c99b80 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -792,16 +792,41 @@ struct xfs_dinode { __be32 di_nlink; /* number of links to file */ __be16 di_projid_lo; /* lower part of owner's project id */ __be16 di_projid_hi; /* higher part owner's project id */ - __u8 di_pad[6]; /* unused, zeroed space */ - __be16 di_flushiter; /* incremented on flush */ + union { + /* Number of data fork extents if NREXT64 is set */ + __be64 di_big_nextents; + + /* Padding for V3 inodes without NREXT64 set. */ + __be64 di_v3_pad; + + /* Padding and inode flush counter for V2 inodes. */ + struct { + __u8 di_v2_pad[6]; + __be16 di_flushiter; + }; + }; xfs_timestamp_t di_atime; /* time last accessed */ xfs_timestamp_t di_mtime; /* time last modified */ xfs_timestamp_t di_ctime; /* time created/inode modified */ __be64 di_size; /* number of bytes in file */ __be64 di_nblocks; /* # of direct & btree blocks used */ __be32 di_extsize; /* basic/minimum extent size for file */ - __be32 di_nextents; /* number of extents in data fork */ - __be16 di_anextents; /* number of extents in attribute fork*/ + union { + /* + * For V2 inodes and V3 inodes without NREXT64 set, this + * is the number of data and attr fork extents. + */ + struct { + __be32 di_nextents; + __be16 di_anextents; + } __packed; + + /* Number of attr fork extents if NREXT64 is set. */ + struct { + __be32 di_big_anextents; + __be16 di_nrext64_pad; + } __packed; + } __packed; __u8 di_forkoff; /* attr fork offs, <<3 for 64b align */ __s8 di_aformat; /* format of attr fork's data */ __be32 di_dmevmask; /* DMIG event mask */ |