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xfs: remove XFS_IFEXTENTS

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The in-memory XFS_IFEXTENTS is now only used to check if an inode with
extents still needs the extents to be read into memory before doing
operations that need the extent map.  Add a new xfs_need_iread_extents
helper that returns true for btree format forks that do not have any
entries in the in-memory extent btree, and use that instead of checking
the XFS_IFEXTENTS flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Christoph Hellwig
2021-04-13 11:15:12 -07:00
committed by Darrick J. Wong
parent 0779f4a68d
commit b2197a36c0
12 changed files with 19 additions and 49 deletions
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3
fs/xfs/xfs_aops.c
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@@ -291,8 +291,7 @@ retry:
cow_fsb = NULLFILEOFF;
whichfork = XFS_DATA_FORK;
xfs_ilock(ip, XFS_ILOCK_SHARED);
ASSERT(ip->i_df.if_format != XFS_DINODE_FMT_BTREE ||
(ip->i_df.if_flags & XFS_IFEXTENTS));
ASSERT(!xfs_need_iread_extents(&ip->i_df));
/*
* Check if this is offset is covered by a COW extents, and if yes use