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xfs: Factor xfs_seek_hole_data into helper

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Factor xfs_seek_hole_data into an unlocked helper which takes
an xfs inode rather than a file for internal use.

Also allow specification of "end" - the vfs lseek interface is
defined such that any offset past eof/i_size shall return -ENXIO,
but we will use this for quota code which does not maintain i_size,
and we want to be able to SEEK_DATA past i_size as well.  So the
lseek path can send in i_size, and the quota code can determine
its own ending offset.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Eric Sandeen 2016-02-08 11:25:16 +11:00 • committed by Dave Chinner
parent 4d4d9523b4
commit 8aa7d37ebf
2 changed files with 59 additions and 25 deletions
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2
fs/xfs/xfs_inode.h
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@ -437,6 +437,8 @@ int xfs_update_prealloc_flags(struct xfs_inode *ip,
int xfs_zero_eof(struct xfs_inode *ip, xfs_off_t offset,
xfs_fsize_t isize, bool *did_zeroing);
int xfs_iozero(struct xfs_inode *ip, loff_t pos, size_t count);
loff_t __xfs_seek_hole_data(struct inode *inode, loff_t start,
loff_t eof, int whence);
/* from xfs_iops.c */