Linux-XFS Archive on lore.kernel.org
 help / color / Atom feed
From: "Darrick J. Wong" <djwong@kernel.org>
To: linux-xfs@vger.kernel.org, hch@infradead.org,
	david@fromorbit.com, Brian Foster <bfoster@redhat.com>
Subject: [PATCH v4.1 07/11] xfs: flush eof/cowblocks if we can't reserve quota for inode creation
Date: Mon, 25 Jan 2021 20:55:17 -0800
Message-ID: <20210126045517.GO7698@magnolia> (raw)
In-Reply-To: <161142795846.2171939.1839413303968531400.stgit@magnolia>

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

If an inode creation is unable to reserve enough quota to handle the
modification, try clearing whatever space the filesystem might have been
hanging onto in the hopes of speeding up the filesystem.  The flushing
behavior will become particularly important when we add deferred inode
inactivation because that will increase the amount of space that isn't
actively tied to user data.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
v4.1: move the retry code to a separate helper to fix the weird return
conventions
---
 fs/xfs/xfs_icache.c      |   78 ++++++++++++++++++++++++++++------------------
 fs/xfs/xfs_icache.h      |    2 +
 fs/xfs/xfs_inode.c       |   17 +++++++++-
 fs/xfs/xfs_quota.h       |   23 +++++++++++---
 fs/xfs/xfs_symlink.c     |    9 +++++
 fs/xfs/xfs_trans_dquot.c |   48 +++++++++++++++++++++++++++-
 6 files changed, 137 insertions(+), 40 deletions(-)

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 7323a1a240bd..ae7888f0e074 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1646,60 +1646,78 @@ xfs_start_block_reaping(
 }
 
 /*
- * Run cow/eofblocks scans on the quotas applicable to the inode. For inodes
- * with multiple quotas, we don't know exactly which quota caused an allocation
- * failure. We make a best effort by including each quota under low free space
- * conditions (less than 1% free space) in the scan.
+ * 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
+ * each quota under low free space conditions (less than 1% free space) in the
+ * scan.
  */
 int
-xfs_blockgc_free_quota(
-	struct xfs_inode	*ip,
+xfs_blockgc_free_dquots(
+	struct xfs_dquot	*udqp,
+	struct xfs_dquot	*gdqp,
+	struct xfs_dquot	*pdqp,
 	unsigned int		eof_flags)
 {
 	struct xfs_eofblocks	eofb = {0};
-	struct xfs_dquot	*dq;
+	struct xfs_mount	*mp = NULL;
 	bool			do_work = false;
 	int			error;
 
+	if (!udqp && !gdqp && !pdqp)
+		return 0;
+	if (udqp)
+		mp = udqp->q_mount;
+	if (!mp && gdqp)
+		mp = gdqp->q_mount;
+	if (!mp && pdqp)
+		mp = pdqp->q_mount;
+
 	/*
 	 * Run a scan to free blocks using the union filter to cover all
 	 * applicable quotas in a single scan.
 	 */
 	eofb.eof_flags = XFS_EOF_FLAGS_UNION | eof_flags;
 
-	if (XFS_IS_UQUOTA_ENFORCED(ip->i_mount)) {
-		dq = xfs_inode_dquot(ip, XFS_DQTYPE_USER);
-		if (dq && xfs_dquot_lowsp(dq)) {
-			eofb.eof_uid = VFS_I(ip)->i_uid;
-			eofb.eof_flags |= XFS_EOF_FLAGS_UID;
-			do_work = true;
-		}
+	if (XFS_IS_UQUOTA_ENFORCED(mp) && udqp && xfs_dquot_lowsp(udqp)) {
+		eofb.eof_uid = make_kuid(mp->m_super->s_user_ns, udqp->q_id);
+		eofb.eof_flags |= XFS_EOF_FLAGS_UID;
+		do_work = true;
 	}
 
-	if (XFS_IS_GQUOTA_ENFORCED(ip->i_mount)) {
-		dq = xfs_inode_dquot(ip, XFS_DQTYPE_GROUP);
-		if (dq && xfs_dquot_lowsp(dq)) {
-			eofb.eof_gid = VFS_I(ip)->i_gid;
-			eofb.eof_flags |= XFS_EOF_FLAGS_GID;
-			do_work = true;
-		}
+	if (XFS_IS_UQUOTA_ENFORCED(mp) && gdqp && xfs_dquot_lowsp(gdqp)) {
+		eofb.eof_gid = make_kgid(mp->m_super->s_user_ns, gdqp->q_id);
+		eofb.eof_flags |= XFS_EOF_FLAGS_GID;
+		do_work = true;
 	}
 
-	if (XFS_IS_PQUOTA_ENFORCED(ip->i_mount)) {
-		dq = xfs_inode_dquot(ip, XFS_DQTYPE_PROJ);
-		if (dq && xfs_dquot_lowsp(dq)) {
-			eofb.eof_prid = ip->i_d.di_projid;
-			eofb.eof_flags |= XFS_EOF_FLAGS_PRID;
-			do_work = true;
-		}
+	if (XFS_IS_PQUOTA_ENFORCED(mp) && pdqp && xfs_dquot_lowsp(pdqp)) {
+		eofb.eof_prid = pdqp->q_id;
+		eofb.eof_flags |= XFS_EOF_FLAGS_PRID;
+		do_work = true;
 	}
 
 	if (!do_work)
 		return 0;
 
-	error = xfs_icache_free_eofblocks(ip->i_mount, &eofb);
+	error = xfs_icache_free_eofblocks(mp, &eofb);
 	if (error)
 		return error;
 
-	return xfs_icache_free_cowblocks(ip->i_mount, &eofb);
+	return xfs_icache_free_cowblocks(mp, &eofb);
+}
+
+/*
+ * Run cow/eofblocks scans on the quotas applicable to the inode. For inodes
+ * with multiple quotas, we don't know exactly which quota caused an allocation
+ * failure. We make a best effort by including each quota under low free space
+ * conditions (less than 1% free space) in the scan.
+ */
+int
+xfs_blockgc_free_quota(
+	struct xfs_inode	*ip,
+	unsigned int		eof_flags)
+{
+	return xfs_blockgc_free_dquots(xfs_inode_dquot(ip, XFS_DQTYPE_USER),
+			xfs_inode_dquot(ip, XFS_DQTYPE_GROUP),
+			xfs_inode_dquot(ip, XFS_DQTYPE_PROJ), eof_flags);
 }
diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index d64ea8f5c589..5f520de637f6 100644
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -54,6 +54,8 @@ long xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
 
 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);
 
 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index e909da05cd28..ad4bfe057737 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -990,6 +990,7 @@ xfs_create(
 	struct xfs_dquot	*gdqp = NULL;
 	struct xfs_dquot	*pdqp = NULL;
 	struct xfs_trans_res	*tres;
+	bool			quota_retry = false;
 	uint			resblks;
 
 	trace_xfs_create(dp, name);
@@ -1022,6 +1023,7 @@ xfs_create(
 	 * the case we'll drop the one we have and get a more
 	 * appropriate transaction later.
 	 */
+retry:
 	error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp);
 	if (error == -ENOSPC) {
 		/* flush outstanding delalloc blocks and retry */
@@ -1038,9 +1040,14 @@ xfs_create(
 	 * Reserve disk quota and the inode.
 	 */
 	error = xfs_trans_reserve_quota_icreate(tp, dp, udqp, gdqp, pdqp,
-			resblks);
+			resblks, &quota_retry);
 	if (error)
 		goto out_trans_cancel;
+	if (quota_retry) {
+		xfs_trans_cancel_qretry_dquots(tp, dp, udqp, gdqp, pdqp);
+		unlock_dp_on_error = false;
+		goto retry;
+	}
 
 	error = xfs_iext_count_may_overflow(dp, XFS_DATA_FORK,
 			XFS_IEXT_DIR_MANIP_CNT(mp));
@@ -1146,6 +1153,7 @@ xfs_create_tmpfile(
 	struct xfs_dquot	*gdqp = NULL;
 	struct xfs_dquot	*pdqp = NULL;
 	struct xfs_trans_res	*tres;
+	bool			quota_retry = false;
 	uint			resblks;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
@@ -1165,14 +1173,19 @@ xfs_create_tmpfile(
 	resblks = XFS_IALLOC_SPACE_RES(mp);
 	tres = &M_RES(mp)->tr_create_tmpfile;
 
+retry:
 	error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp);
 	if (error)
 		goto out_release_inode;
 
 	error = xfs_trans_reserve_quota_icreate(tp, dp, udqp, gdqp, pdqp,
-			resblks);
+			resblks, &quota_retry);
 	if (error)
 		goto out_trans_cancel;
+	if (quota_retry) {
+		xfs_trans_cancel_qretry_dquots(tp, NULL, udqp, gdqp, pdqp);
+		goto retry;
+	}
 
 	error = xfs_dir_ialloc(&tp, dp, mode, 0, 0, prid, &ip);
 	if (error)
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
index 321c093459a1..c5bbe7e3e259 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -87,10 +87,13 @@ int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip,
 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
 		struct xfs_mount *, struct xfs_dquot *,
 		struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
-int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_inode *dp,
-		struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
-		struct xfs_dquot *pdqp, int64_t nblks);
 int xfs_trans_cancel_qretry(struct xfs_trans *tp, struct xfs_inode *ip);
+int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_inode *dp,
+		struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
+		struct xfs_dquot *pdqp, int64_t nblks, bool *retry);
+int xfs_trans_cancel_qretry_dquots(struct xfs_trans *tp, struct xfs_inode *dp,
+		struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
+		struct xfs_dquot *pdqp);
 
 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t,
 		prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
@@ -159,7 +162,7 @@ xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t nblks, bool isrt)
 static inline int
 xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_inode *dp,
 		struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
-		struct xfs_dquot *pdqp, int64_t nblks)
+		struct xfs_dquot *pdqp, int64_t nblks, bool *retry)
 {
 	return 0;
 }
@@ -171,6 +174,18 @@ xfs_trans_cancel_qretry(struct xfs_trans *tp, struct xfs_inode *ip)
 	return 0;
 }
 
+static inline int
+xfs_trans_cancel_qretry_dquots(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*dp,
+	struct xfs_dquot	*udqp,
+	struct xfs_dquot	*gdqp,
+	struct xfs_dquot	*pdqp)
+{
+	ASSERT(0);
+	return 0;
+}
+
 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
 #define xfs_qm_vop_rename_dqattach(it)					(0)
 #define xfs_qm_vop_chown(tp, ip, old, new)				(NULL)
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index f8bfa51bdeef..c97a3d147bc2 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -159,6 +159,7 @@ xfs_symlink(
 	struct xfs_dquot	*udqp = NULL;
 	struct xfs_dquot	*gdqp = NULL;
 	struct xfs_dquot	*pdqp = NULL;
+	bool			quota_retry = false;
 	uint			resblks;
 
 	*ipp = NULL;
@@ -197,6 +198,7 @@ xfs_symlink(
 		fs_blocks = xfs_symlink_blocks(mp, pathlen);
 	resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks);
 
+retry:
 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_symlink, resblks, 0, 0, &tp);
 	if (error)
 		goto out_release_inode;
@@ -216,9 +218,14 @@ xfs_symlink(
 	 * Reserve disk quota : blocks and inode.
 	 */
 	error = xfs_trans_reserve_quota_icreate(tp, dp, udqp, gdqp, pdqp,
-			resblks);
+			resblks, &quota_retry);
 	if (error)
 		goto out_trans_cancel;
+	if (quota_retry) {
+		xfs_trans_cancel_qretry_dquots(tp, dp, udqp, gdqp, pdqp);
+		unlock_dp_on_error = false;
+		goto retry;
+	}
 
 	error = xfs_iext_count_may_overflow(dp, XFS_DATA_FORK,
 			XFS_IEXT_DIR_MANIP_CNT(mp));
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index 4b679b9f2da7..b463047f04c6 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -835,7 +835,17 @@ xfs_trans_cancel_qretry(
 	return xfs_blockgc_free_quota(ip, 0);
 }
 
-/* Change the quota reservations for an inode creation activity. */
+/*
+ * Change the quota reservations for an inode creation activity.  This doesn't
+ * change the actual usage, just the reservation.  The caller may hold
+ * ILOCK_EXCL on the inode.  If @retry is not a NULL pointer, the caller must
+ * ensure that *retry is set to false before the first time this function is
+ * called.
+ *
+ * If the quota reservation fails because we hit a quota limit (and retry is
+ * not a NULL pointer, and *retry is false), this function will set *retry to
+ * true and return zero.
+ */
 int
 xfs_trans_reserve_quota_icreate(
 	struct xfs_trans	*tp,
@@ -843,17 +853,49 @@ xfs_trans_reserve_quota_icreate(
 	struct xfs_dquot	*udqp,
 	struct xfs_dquot	*gdqp,
 	struct xfs_dquot	*pdqp,
-	int64_t			nblks)
+	int64_t			nblks,
+	bool			*retry)
 {
 	struct xfs_mount	*mp = dp->i_mount;
+	int			error;
 
 	if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 		return 0;
 
 	ASSERT(!xfs_is_quota_inode(&mp->m_sb, dp->i_ino));
 
-	return xfs_trans_reserve_quota_bydquots(tp, dp->i_mount, udqp, gdqp,
+	error = xfs_trans_reserve_quota_bydquots(tp, dp->i_mount, udqp, gdqp,
 			pdqp, nblks, 1, XFS_QMOPT_RES_REGBLKS);
+	if (retry == NULL)
+		return error;
+	/* We only allow one retry for EDQUOT/ENOSPC. */
+	if (*retry || (error != -EDQUOT && error != -ENOSPC)) {
+		*retry = false;
+		return error;
+	}
+
+	*retry = true;
+	return 0;
+}
+
+/*
+ * Cancel a transaction and try to clear some space so that we can reserve some
+ * quota.  When this function returns, the transaction will be cancelled and dp
+ * (if one is supplied) will be unlocked.
+ */
+int
+xfs_trans_cancel_qretry_dquots(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*dp,
+	struct xfs_dquot	*udqp,
+	struct xfs_dquot	*gdqp,
+	struct xfs_dquot	*pdqp)
+{
+	xfs_trans_cancel(tp);
+	if (dp)
+		xfs_iunlock(dp, XFS_ILOCK_EXCL);
+
+	return xfs_blockgc_free_dquots(udqp, gdqp, pdqp, 0);
 }
 
 /*

  reply index

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
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 01/11] xfs: refactor messy xfs_inode_free_quota_* functions Darrick J. Wong
2021-01-25 18:13   ` Brian Foster
2021-01-25 19:33     ` Darrick J. Wong
2021-01-23 18:52 ` [PATCH 02/11] xfs: don't stall cowblocks scan if we can't take locks Darrick J. Wong
2021-01-25 18:14   ` Brian Foster
2021-01-25 19:54     ` Darrick J. Wong
2021-01-26 13:14       ` Brian Foster
2021-01-26 18:34         ` Darrick J. Wong
2021-01-26 20:03           ` Brian Foster
2021-01-27  3:09             ` Darrick J. Wong
2021-01-23 18:52 ` [PATCH 03/11] xfs: xfs_inode_free_quota_blocks should scan project quota Darrick J. Wong
2021-01-25 18:14   ` Brian Foster
2021-01-23 18:52 ` [PATCH 04/11] xfs: move and rename xfs_inode_free_quota_blocks to avoid conflicts Darrick J. Wong
2021-01-25 18:14   ` Brian Foster
2021-01-23 18:52 ` [PATCH 05/11] xfs: pass flags and return gc errors from xfs_blockgc_free_quota Darrick J. Wong
2021-01-24  9:34   ` Christoph Hellwig
2021-01-25 18:15   ` Brian Foster
2021-01-26  4:52   ` [PATCH v4.1 " Darrick J. Wong
2021-01-27 16:59     ` Christoph Hellwig
2021-01-27 17:11       ` Darrick J. Wong
2021-01-23 18:52 ` [PATCH 06/11] xfs: flush eof/cowblocks if we can't reserve quota for file blocks Darrick J. Wong
2021-01-24  9:39   ` Christoph Hellwig
2021-01-25 18:16     ` Brian Foster
2021-01-25 18:57       ` Darrick J. Wong
2021-01-26 13:26         ` Brian Foster
2021-01-26 21:12           ` Darrick J. Wong
2021-01-27 14:19             ` Brian Foster
2021-01-27 17:19               ` Darrick J. Wong
2021-01-26  4:53   ` [PATCH v4.1 " Darrick J. Wong
2021-01-23 18:52 ` [PATCH 07/11] xfs: flush eof/cowblocks if we can't reserve quota for inode creation Darrick J. Wong
2021-01-26  4:55   ` Darrick J. Wong [this message]
2021-01-23 18:52 ` [PATCH 08/11] xfs: flush eof/cowblocks if we can't reserve quota for chown Darrick J. Wong
2021-01-26  4:55   ` [PATCH v4.1 " Darrick J. Wong
2021-01-23 18:52 ` [PATCH 09/11] xfs: add a tracepoint for blockgc scans Darrick J. Wong
2021-01-25 18:45   ` Brian Foster
2021-01-26  4:56   ` [PATCH v4.1 " 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
2021-01-23 18:53 ` [PATCH 11/11] xfs: flush speculative space allocations when we run out of space Darrick J. Wong
2021-01-24  9:48   ` Christoph Hellwig
2021-01-25 18:46     ` Brian Foster
2021-01-25 20:02     ` Darrick J. Wong
2021-01-25 21:06       ` Brian Foster
2021-01-26  0:29         ` Darrick J. Wong
2021-01-27 16:57           ` Christoph Hellwig
2021-01-27 21:00             ` Darrick J. Wong
2021-01-26  4:59   ` [PATCH v4.1 " Darrick J. Wong

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210126045517.GO7698@magnolia \
    --to=djwong@kernel.org \
    --cc=bfoster@redhat.com \
    --cc=david@fromorbit.com \
    --cc=hch@infradead.org \
    --cc=linux-xfs@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-XFS Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-xfs/0 linux-xfs/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-xfs linux-xfs/ https://lore.kernel.org/linux-xfs \
		linux-xfs@vger.kernel.org
	public-inbox-index linux-xfs

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-xfs


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git