xfs: remove xfs_itruncate_data
This wrapper isn't overly useful, not to say rather confusing.
Around the call to xfs_itruncate_extents it does:
- add tracing
- add a few asserts in debug builds
- conditionally update the inode size in two places
- log the inode
Both the tracing and the inode logging can be moved to xfs_itruncate_extents
as they are useful for the attribute fork as well - in fact the attr code
already does an equivalent xfs_trans_log_inode call just after calling
xfs_itruncate_extents. The conditional size updates are a mess, and there
was no reason to do them in two places anyway, as the first one was
conditional on the inode having extents - but without extents we
xfs_itruncate_extents would be a no-op and the placement wouldn't matter
anyway. Instead move the size assignments and the asserts that make sense
to the callers that want it.
As a side effect of this clean up xfs_setattr_size by introducing variables
for the old and new inode size, and moving the size updates into a common
place.
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 9dda7cc..ccd619a 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1166,52 +1166,6 @@
}
/*
- * Check to make sure that there are no blocks allocated to the
- * file beyond the size of the file. We don't check this for
- * files with fixed size extents or real time extents, but we
- * at least do it for regular files.
- */
-#ifdef DEBUG
-STATIC void
-xfs_isize_check(
- struct xfs_inode *ip,
- xfs_fsize_t isize)
-{
- struct xfs_mount *mp = ip->i_mount;
- xfs_fileoff_t map_first;
- int nimaps;
- xfs_bmbt_irec_t imaps[2];
- int error;
-
- if (!S_ISREG(ip->i_d.di_mode))
- return;
-
- if (XFS_IS_REALTIME_INODE(ip))
- return;
-
- if (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
- return;
-
- nimaps = 2;
- map_first = XFS_B_TO_FSB(mp, (xfs_ufsize_t)isize);
- /*
- * The filesystem could be shutting down, so bmapi may return
- * an error.
- */
- error = xfs_bmapi_read(ip, map_first,
- (XFS_B_TO_FSB(mp,
- (xfs_ufsize_t)XFS_MAXIOFFSET(mp)) - map_first),
- imaps, &nimaps, XFS_BMAPI_ENTIRE);
- if (error)
- return;
- ASSERT(nimaps == 1);
- ASSERT(imaps[0].br_startblock == HOLESTARTBLOCK);
-}
-#else /* DEBUG */
-#define xfs_isize_check(ip, isize)
-#endif /* DEBUG */
-
-/*
* Free up the underlying blocks past new_size. The new size must be smaller
* than the current size. This routine can be used both for the attribute and
* data fork, and does not modify the inode size, which is left to the caller.
@@ -1258,6 +1212,8 @@
ASSERT(ip->i_itemp->ili_lock_flags == 0);
ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
+ trace_xfs_itruncate_extents_start(ip, new_size);
+
/*
* Since it is possible for space to become allocated beyond
* the end of the file (in a crash where the space is allocated
@@ -1325,6 +1281,14 @@
goto out;
}
+ /*
+ * Always re-log the inode so that our permanent transaction can keep
+ * on rolling it forward in the log.
+ */
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+
+ trace_xfs_itruncate_extents_end(ip, new_size);
+
out:
*tpp = tp;
return error;
@@ -1338,74 +1302,6 @@
goto out;
}
-int
-xfs_itruncate_data(
- struct xfs_trans **tpp,
- struct xfs_inode *ip,
- xfs_fsize_t new_size)
-{
- int error;
-
- trace_xfs_itruncate_data_start(ip, new_size);
-
- /*
- * The first thing we do is set the size to new_size permanently on
- * disk. This way we don't have to worry about anyone ever being able
- * to look at the data being freed even in the face of a crash.
- * What we're getting around here is the case where we free a block, it
- * is allocated to another file, it is written to, and then we crash.
- * If the new data gets written to the file but the log buffers
- * containing the free and reallocation don't, then we'd end up with
- * garbage in the blocks being freed. As long as we make the new_size
- * permanent before actually freeing any blocks it doesn't matter if
- * they get written to.
- */
- if (ip->i_d.di_nextents > 0) {
- /*
- * If we are not changing the file size then do not update
- * the on-disk file size - we may be called from
- * xfs_inactive_free_eofblocks(). If we update the on-disk
- * file size and then the system crashes before the contents
- * of the file are flushed to disk then the files may be
- * full of holes (ie NULL files bug).
- */
- if (ip->i_size != new_size) {
- ip->i_d.di_size = new_size;
- ip->i_size = new_size;
- xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
- }
- }
-
- error = xfs_itruncate_extents(tpp, ip, XFS_DATA_FORK, new_size);
- if (error)
- return error;
-
- /*
- * If we are not changing the file size then do not update the on-disk
- * file size - we may be called from xfs_inactive_free_eofblocks().
- * If we update the on-disk file size and then the system crashes
- * before the contents of the file are flushed to disk then the files
- * may be full of holes (ie NULL files bug).
- */
- xfs_isize_check(ip, new_size);
- if (ip->i_size != new_size) {
- ip->i_d.di_size = new_size;
- ip->i_size = new_size;
- }
-
- ASSERT(new_size != 0 || ip->i_delayed_blks == 0);
- ASSERT(new_size != 0 || ip->i_d.di_nextents == 0);
-
- /*
- * Always re-log the inode so that our permanent transaction can keep
- * on rolling it forward in the log.
- */
- xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
-
- trace_xfs_itruncate_data_end(ip, new_size);
- return 0;
-}
-
/*
* This is called when the inode's link count goes to 0.
* We place the on-disk inode on a list in the AGI. It