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| author | Chandan Babu R <chandan.babu@oracle.com> | 2022-03-09 12:58:37 +0000 |
|---|---|---|
| committer | Chandan Babu R <chandan.babu@oracle.com> | 2022-04-13 07:02:45 +0000 |
| commit | c3c4ecb529c5a1f0590cffb70649d407ee79b8a8 (patch) | |
| tree | ab980fbbcd460bfb26e8e79ed49b99e5e3acc77d /fs/xfs/libxfs/xfs_fs.h | |
| parent | 5b35d922c5279804be87cab60e4810403038488b (diff) | |
| download | lwn-c3c4ecb529c5a1f0590cffb70649d407ee79b8a8.tar.gz lwn-c3c4ecb529c5a1f0590cffb70649d407ee79b8a8.zip | |
xfs: Enable bulkstat ioctl to support 64-bit per-inode extent counters
The following changes are made to enable userspace to obtain 64-bit extent
counters,
1. Carve out a new 64-bit field xfs_bulkstat->bs_extents64 from
xfs_bulkstat->bs_pad[] to hold 64-bit extent counter.
2. Define the new flag XFS_BULK_IREQ_BULKSTAT for userspace to indicate that
it is capable of receiving 64-bit extent counters.
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Suggested-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_fs.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_fs.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 1f7238db35cc..1d2682ccdb78 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -378,7 +378,7 @@ struct xfs_bulkstat { uint32_t bs_extsize_blks; /* extent size hint, blocks */ uint32_t bs_nlink; /* number of links */ - uint32_t bs_extents; /* number of extents */ + uint32_t bs_extents; /* 32-bit data fork extent counter */ uint32_t bs_aextents; /* attribute number of extents */ uint16_t bs_version; /* structure version */ uint16_t bs_forkoff; /* inode fork offset in bytes */ @@ -387,8 +387,9 @@ struct xfs_bulkstat { uint16_t bs_checked; /* checked inode metadata */ uint16_t bs_mode; /* type and mode */ uint16_t bs_pad2; /* zeroed */ + uint64_t bs_extents64; /* 64-bit data fork extent counter */ - uint64_t bs_pad[7]; /* zeroed */ + uint64_t bs_pad[6]; /* zeroed */ }; #define XFS_BULKSTAT_VERSION_V1 (1) @@ -460,17 +461,28 @@ struct xfs_bulk_ireq { * Only return results from the specified @agno. If @ino is zero, start * with the first inode of @agno. */ -#define XFS_BULK_IREQ_AGNO (1 << 0) +#define XFS_BULK_IREQ_AGNO (1U << 0) /* * Return bulkstat information for a single inode, where @ino value is a * special value, not a literal inode number. See the XFS_BULK_IREQ_SPECIAL_* * values below. Not compatible with XFS_BULK_IREQ_AGNO. */ -#define XFS_BULK_IREQ_SPECIAL (1 << 1) +#define XFS_BULK_IREQ_SPECIAL (1U << 1) -#define XFS_BULK_IREQ_FLAGS_ALL (XFS_BULK_IREQ_AGNO | \ - XFS_BULK_IREQ_SPECIAL) +/* + * Return data fork extent count via xfs_bulkstat->bs_extents64 field and assign + * 0 to xfs_bulkstat->bs_extents when the flag is set. Otherwise, use + * xfs_bulkstat->bs_extents for returning data fork extent count and set + * xfs_bulkstat->bs_extents64 to 0. In the second case, return -EOVERFLOW and + * assign 0 to xfs_bulkstat->bs_extents if data fork extent count is larger than + * XFS_MAX_EXTCNT_DATA_FORK_OLD. + */ +#define XFS_BULK_IREQ_NREXT64 (1U << 2) + +#define XFS_BULK_IREQ_FLAGS_ALL (XFS_BULK_IREQ_AGNO | \ + XFS_BULK_IREQ_SPECIAL | \ + XFS_BULK_IREQ_NREXT64) /* Operate on the root directory inode. */ #define XFS_BULK_IREQ_SPECIAL_ROOT (1) |