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From: "Darrick J. Wong" <djwong@kernel.org>
To: djwong@kernel.org
Cc: Christoph Hellwig <hch@lst.de>,
	linux-xfs@vger.kernel.org, hch@infradead.org,
	david@fromorbit.com, bfoster@redhat.com
Subject: [PATCH 10/11] xfs: refactor xfs_icache_free_{eof,cow}blocks call sites
Date: Wed, 27 Jan 2021 22:03:17 -0800
Message-ID: <161181379764.1525026.7294780140646492910.stgit@magnolia> (raw)
In-Reply-To: <161181374062.1525026.14717838769921652940.stgit@magnolia>

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

In anticipation of more restructuring of the eof/cowblocks gc code,
refactor calling of those two functions into a single internal helper
function, then present a new standard interface to purge speculative
block preallocations and start shifting higher level code to use that.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/xfs_file.c   |    3 +--
 fs/xfs/xfs_icache.c |   39 +++++++++++++++++++++++++++++++++------
 fs/xfs/xfs_icache.h |    1 +
 fs/xfs/xfs_trace.h  |    1 +
 4 files changed, 36 insertions(+), 8 deletions(-)


diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 3be0b1d81325..dc91973c0b4f 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -759,8 +759,7 @@ xfs_file_buffered_write(
 
 		xfs_iunlock(ip, iolock);
 		eofb.eof_flags = XFS_EOF_FLAGS_SYNC;
-		xfs_icache_free_eofblocks(ip->i_mount, &eofb);
-		xfs_icache_free_cowblocks(ip->i_mount, &eofb);
+		xfs_blockgc_free_space(ip->i_mount, &eofb);
 		goto write_retry;
 	}
 
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index cd369dd48818..97c15fcdd6f7 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1645,6 +1645,38 @@ xfs_start_block_reaping(
 	xfs_queue_cowblocks(mp);
 }
 
+/* Scan all incore inodes for block preallocations that we can remove. */
+static inline int
+xfs_blockgc_scan(
+	struct xfs_mount	*mp,
+	struct xfs_eofblocks	*eofb)
+{
+	int			error;
+
+	error = xfs_icache_free_eofblocks(mp, eofb);
+	if (error)
+		return error;
+
+	error = xfs_icache_free_cowblocks(mp, eofb);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+/*
+ * Try to free space in the filesystem by purging eofblocks and cowblocks.
+ */
+int
+xfs_blockgc_free_space(
+	struct xfs_mount	*mp,
+	struct xfs_eofblocks	*eofb)
+{
+	trace_xfs_blockgc_free_space(mp, eofb, _RET_IP_);
+
+	return xfs_blockgc_scan(mp, eofb);
+}
+
 /*
  * Run cow/eofblocks scans on the supplied dquots.  We don't know exactly which
  * quota caused an allocation failure, so we make a best effort by including
@@ -1665,7 +1697,6 @@ xfs_blockgc_free_dquots(
 	struct xfs_eofblocks	eofb = {0};
 	struct xfs_mount	*mp = NULL;
 	bool			do_work = false;
-	int			error;
 
 	if (!udqp && !gdqp && !pdqp)
 		return 0;
@@ -1703,11 +1734,7 @@ xfs_blockgc_free_dquots(
 	if (!do_work)
 		return 0;
 
-	error = xfs_icache_free_eofblocks(mp, &eofb);
-	if (error)
-		return error;
-
-	return xfs_icache_free_cowblocks(mp, &eofb);
+	return xfs_blockgc_free_space(mp, &eofb);
 }
 
 /* Run cow/eofblocks scans on the quotas attached to the inode. */
diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index 5f520de637f6..583c132ae0fb 100644
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -57,6 +57,7 @@ void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
 int xfs_blockgc_free_dquots(struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
 		struct xfs_dquot *pdqp, unsigned int eof_flags);
 int xfs_blockgc_free_quota(struct xfs_inode *ip, unsigned int eof_flags);
+int xfs_blockgc_free_space(struct xfs_mount *mp, struct xfs_eofblocks *eofb);
 
 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 38649e3341cb..27929c6ca43a 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -3928,6 +3928,7 @@ DEFINE_EVENT(xfs_eofblocks_class, name,	\
 		 unsigned long caller_ip), \
 	TP_ARGS(mp, eofb, caller_ip))
 DEFINE_EOFBLOCKS_EVENT(xfs_ioc_free_eofblocks);
+DEFINE_EOFBLOCKS_EVENT(xfs_blockgc_free_space);
 
 #endif /* _TRACE_XFS_H */
 


  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-28  6:02 [PATCHSET v5 00/11] xfs: try harder to reclaim space when we run out Darrick J. Wong
2021-01-28  6:02 ` [PATCH 01/11] xfs: trigger all block gc scans when low on quota space Darrick J. Wong
2021-01-28  6:02 ` [PATCH 02/11] xfs: don't stall cowblocks scan if we can't take locks Darrick J. Wong
2021-01-28  6:02 ` [PATCH 03/11] xfs: xfs_inode_free_quota_blocks should scan project quota Darrick J. Wong
2021-01-28  6:02 ` [PATCH 04/11] xfs: move and rename xfs_inode_free_quota_blocks to avoid conflicts Darrick J. Wong
2021-01-28  6:02 ` [PATCH 05/11] xfs: pass flags and return gc errors from xfs_blockgc_free_quota Darrick J. Wong
2021-01-28  6:02 ` [PATCH 06/11] xfs: flush eof/cowblocks if we can't reserve quota for file blocks Darrick J. Wong
2021-01-28  9:26   ` Christoph Hellwig
2021-01-28  6:03 ` [PATCH 07/11] xfs: flush eof/cowblocks if we can't reserve quota for inode creation Darrick J. Wong
2021-01-28  6:03 ` [PATCH 08/11] xfs: flush eof/cowblocks if we can't reserve quota for chown Darrick J. Wong
2021-01-28  6:03 ` [PATCH 09/11] xfs: add a tracepoint for blockgc scans Darrick J. Wong
2021-01-28  6:03 ` Darrick J. Wong [this message]
2021-01-28  6:03 ` [PATCH 11/11] xfs: flush speculative space allocations when we run out of space Darrick J. Wong
2021-01-28  9:26   ` Christoph Hellwig
  -- strict thread matches above, loose matches on Subject: below --
2021-01-23 18:51 [PATCHSET v4 00/11] xfs: try harder to reclaim space when we run out Darrick J. Wong
2021-01-23 18:52 ` [PATCH 10/11] xfs: refactor xfs_icache_free_{eof,cow}blocks call sites Darrick J. Wong
2021-01-24  9:41   ` Christoph Hellwig
2021-01-25 18:46   ` Brian Foster
2021-01-26  2:33     ` Darrick J. Wong
2021-01-18 22:11 [PATCHSET v3 00/11] xfs: try harder to reclaim space when we run out Darrick J. Wong
2021-01-18 22:12 ` [PATCH 10/11] xfs: refactor xfs_icache_free_{eof,cow}blocks call sites Darrick J. Wong

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