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author | 2019-10-28 08:41:43 -0700 | |
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committer | 2019-10-29 09:50:12 -0700 | |
commit | dd2d535e3fb29d744aa8905c7d55199ce6bbfa49 (patch) | |
tree | dd7c06a8ef0b8ae635114a25bba63d82737eba24 /fs/xfs/xfs_iops.c | |
parent | xfs: remove the dsunit and dswidth variables in (diff) | |
download | linux-dd2d535e3fb29d744aa8905c7d55199ce6bbfa49.tar.gz linux-dd2d535e3fb29d744aa8905c7d55199ce6bbfa49.tar.bz2 linux-dd2d535e3fb29d744aa8905c7d55199ce6bbfa49.zip |
xfs: cleanup calculating the stat optimal I/O size
Move xfs_preferred_iosize to xfs_iops.c, unobsfucate it and also handle
the realtime special case in the helper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_iops.c')
-rw-r--r-- | fs/xfs/xfs_iops.c | 47 |
1 files changed, 37 insertions, 10 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 404f2dd58698..b6dbfd8eb6a1 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -484,6 +484,42 @@ xfs_vn_get_link_inline( return link; } +static uint32_t +xfs_stat_blksize( + struct xfs_inode *ip) +{ + struct xfs_mount *mp = ip->i_mount; + + /* + * If the file blocks are being allocated from a realtime volume, then + * always return the realtime extent size. + */ + if (XFS_IS_REALTIME_INODE(ip)) + return xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; + + /* + * Allow large block sizes to be reported to userspace programs if the + * "largeio" mount option is used. + * + * If compatibility mode is specified, simply return the basic unit of + * caching so that we don't get inefficient read/modify/write I/O from + * user apps. Otherwise.... + * + * If the underlying volume is a stripe, then return the stripe width in + * bytes as the recommended I/O size. It is not a stripe and we've set a + * default buffered I/O size, return that, otherwise return the compat + * default. + */ + if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)) { + if (mp->m_swidth) + return mp->m_swidth << mp->m_sb.sb_blocklog; + if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) + return 1U << max(mp->m_readio_log, mp->m_writeio_log); + } + + return PAGE_SIZE; +} + STATIC int xfs_vn_getattr( const struct path *path, @@ -543,16 +579,7 @@ xfs_vn_getattr( stat->rdev = inode->i_rdev; break; default: - if (XFS_IS_REALTIME_INODE(ip)) { - /* - * If the file blocks are being allocated from a - * realtime volume, then return the inode's realtime - * extent size or the realtime volume's extent size. - */ - stat->blksize = - xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; - } else - stat->blksize = xfs_preferred_iosize(mp); + stat->blksize = xfs_stat_blksize(ip); stat->rdev = 0; break; } |