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From: "Darrick J. Wong" <djwong@kernel.org>
To: djwong@kernel.org
Cc: linux-xfs@vger.kernel.org, david@fromorbit.com, hch@infradead.org
Subject: [PATCH 11/15] xfs: make the icwalk processing functions clean up the grab state
Date: Wed, 02 Jun 2021 15:25:57 -0700	[thread overview]
Message-ID: <162267275779.2375284.17546006970223560395.stgit@locust> (raw)
In-Reply-To: <162267269663.2375284.15885514656776142361.stgit@locust>

From: Darrick J. Wong <djwong@kernel.org>

Soon we're going to be adding two new callers to the incore inode walk
code: reclaim of incore inodes, and (later) inactivation of inodes.
Both states operate on inodes that no longer have any VFS state, so we
need to move the xfs_irele calls into the processing functions.

In other words, icwalk processing functions are responsible for cleaning
up whatever state changes are made by the corresponding icwalk igrab
function that picked the inode for processing.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 fs/xfs/xfs_icache.c |   20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)


diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 94dba5c1b98d..806faa8df7e9 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -811,7 +811,7 @@ xfs_dqrele_igrab(
 }
 
 /* Drop this inode's dquots. */
-static int
+static void
 xfs_dqrele_inode(
 	struct xfs_inode	*ip,
 	void			*priv)
@@ -835,7 +835,7 @@ xfs_dqrele_inode(
 		ip->i_pdquot = NULL;
 	}
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
-	return 0;
+	xfs_irele(ip);
 }
 
 /*
@@ -861,7 +861,7 @@ xfs_dqrele_all_inodes(
 }
 #else
 # define xfs_dqrele_igrab(ip)		(false)
-# define xfs_dqrele_inode(ip, priv)	(0)
+# define xfs_dqrele_inode(ip, priv)	((void)0)
 #endif /* CONFIG_XFS_QUOTA */
 
 /*
@@ -1592,6 +1592,7 @@ xfs_blockgc_scan_inode(
 unlock:
 	if (lockflags)
 		xfs_iunlock(ip, lockflags);
+	xfs_irele(ip);
 	return error;
 }
 
@@ -1698,8 +1699,7 @@ xfs_blockgc_free_quota(
 
 /*
  * Decide if we want to grab this inode in anticipation of doing work towards
- * the goal.  If selected, the VFS must hold a reference to this inode, which
- * will be released after processing.
+ * the goal.
  */
 static inline bool
 xfs_icwalk_igrab(
@@ -1716,24 +1716,26 @@ xfs_icwalk_igrab(
 	}
 }
 
-/* Process an inode and release it.  Return -EAGAIN to skip an inode. */
+/*
+ * Process an inode.  Each processing function must handle any state changes
+ * made by the icwalk igrab function.  Return -EAGAIN to skip an inode.
+ */
 static inline int
 xfs_icwalk_process_inode(
 	enum xfs_icwalk_goal	goal,
 	struct xfs_inode	*ip,
 	void			*args)
 {
-	int			error;
+	int			error = 0;
 
 	switch (goal) {
 	case XFS_ICWALK_DQRELE:
-		error = xfs_dqrele_inode(ip, args);
+		xfs_dqrele_inode(ip, args);
 		break;
 	case XFS_ICWALK_BLOCKGC:
 		error = xfs_blockgc_scan_inode(ip, args);
 		break;
 	}
-	xfs_irele(ip);
 	return error;
 }
 


  parent reply	other threads:[~2021-06-02 22:25 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-02 22:24 [PATCHSET v6 00/15] xfs: clean up incore inode walk functions Darrick J. Wong
2021-06-02 22:25 ` [PATCH 01/15] xfs: move the quotaoff dqrele inode walk into xfs_icache.c Darrick J. Wong
2021-06-02 22:25 ` [PATCH 02/15] xfs: detach inode dquots at the end of inactivation Darrick J. Wong
2021-06-02 22:25 ` [PATCH 03/15] xfs: move the inode walk functions further down Darrick J. Wong
2021-06-02 22:25 ` [PATCH 04/15] xfs: rename xfs_inode_walk functions to xfs_icwalk Darrick J. Wong
2021-06-03  1:02   ` Dave Chinner
2021-06-02 22:25 ` [PATCH 05/15] xfs: pass the goal of the incore inode walk to xfs_inode_walk() Darrick J. Wong
2021-06-03  1:04   ` Dave Chinner
2021-06-02 22:25 ` [PATCH 06/15] xfs: separate the dqrele_all inode grab logic from xfs_inode_walk_ag_grab Darrick J. Wong
2021-06-03  1:08   ` Dave Chinner
2021-06-02 22:25 ` [PATCH 07/15] xfs: move xfs_inew_wait call into xfs_dqrele_inode Darrick J. Wong
2021-06-02 22:25 ` [PATCH 08/15] xfs: remove iter_flags parameter from xfs_inode_walk_* Darrick J. Wong
2021-06-03  1:09   ` Dave Chinner
2021-06-03  1:38     ` Darrick J. Wong
2021-06-02 22:25 ` [PATCH 09/15] xfs: remove indirect calls from xfs_inode_walk{,_ag} Darrick J. Wong
2021-06-03  1:12   ` Dave Chinner
2021-06-02 22:25 ` [PATCH 10/15] xfs: clean up inode state flag tests in xfs_blockgc_igrab Darrick J. Wong
2021-06-03  1:13   ` Dave Chinner
2021-06-02 22:25 ` Darrick J. Wong [this message]
2021-06-03  1:14   ` [PATCH 11/15] xfs: make the icwalk processing functions clean up the grab state Dave Chinner
2021-06-02 22:26 ` [PATCH 12/15] xfs: fix radix tree tag signs Darrick J. Wong
2021-06-02 22:26 ` [PATCH 13/15] xfs: pass struct xfs_eofblocks to the inode scan callback Darrick J. Wong
2021-06-02 22:26 ` [PATCH 14/15] xfs: merge xfs_reclaim_inodes_ag into xfs_inode_walk_ag Darrick J. Wong
2021-06-02 22:26 ` [PATCH 15/15] xfs: refactor per-AG inode tagging functions Darrick J. Wong
2021-06-03  1:16   ` Dave Chinner
2021-06-03  1:27     ` Darrick J. Wong

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