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From: "Darrick J. Wong" <djwong@kernel.org>
To: sandeen@sandeen.net, djwong@kernel.org
Cc: Dave Chinner <dchinner@redhat.com>, linux-xfs@vger.kernel.org
Subject: [PATCH 26/43] xfs: convert remaining mount flags to state flags
Date: Mon, 13 Sep 2021 19:42:22 -0700	[thread overview]
Message-ID: <163158734206.1604118.14166556549871621918.stgit@magnolia> (raw)
In-Reply-To: <163158719952.1604118.14415288328687941574.stgit@magnolia>

From: Dave Chinner <dchinner@redhat.com>

Source kernel commit: 2e973b2cd4cdb993be94cca4c33f532f1ed05316

The remaining mount flags kept in m_flags are actually runtime state
flags. These change dynamically, so they really should be updated
atomically so we don't potentially lose an update due to racing
modifications.

Convert these remaining flags to be stored in m_opstate and use
atomic bitops to set and clear the flags. This also adds a couple of
simple wrappers for common state checks - read only and shutdown.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 include/xfs_mount.h |   38 ++++++++++++++++++++++++++++++++++++++
 libxfs/init.c       |   12 ++++++++----
 libxfs/xfs_alloc.c  |    2 +-
 libxfs/xfs_sb.c     |    2 +-
 4 files changed, 48 insertions(+), 6 deletions(-)


diff --git a/include/xfs_mount.h b/include/xfs_mount.h
index aed31404..0f7b9787 100644
--- a/include/xfs_mount.h
+++ b/include/xfs_mount.h
@@ -79,6 +79,7 @@ typedef struct xfs_mount {
 	struct radix_tree_root	m_perag_tree;
 	uint			m_flags;	/* global mount flags */
 	uint64_t		m_features;	/* active filesystem features */
+	unsigned long		m_opstate;	/* dynamic state flags */
 	bool			m_finobt_nores; /* no per-AG finobt resv. */
 	uint			m_qflags;	/* quota status flags */
 	uint			m_attroffset;	/* inode attribute offset */
@@ -204,6 +205,43 @@ __XFS_UNSUPP_FEAT(wsync)
 __XFS_UNSUPP_FEAT(noattr2)
 __XFS_UNSUPP_FEAT(ikeep)
 __XFS_UNSUPP_FEAT(swalloc)
+__XFS_UNSUPP_FEAT(readonly)
+
+/*
+ * Operational mount state flags
+ *
+ * XXX: need real atomic bit ops!
+ */
+#define XFS_OPSTATE_INODE32		0	/* inode32 allocator active */
+
+#define __XFS_IS_OPSTATE(name, NAME) \
+static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
+{ \
+	return (mp)->m_opstate & (1UL << XFS_OPSTATE_ ## NAME); \
+} \
+static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
+{ \
+	bool	ret = xfs_is_ ## name(mp); \
+\
+	(mp)->m_opstate &= ~(1UL << XFS_OPSTATE_ ## NAME); \
+	return ret; \
+} \
+static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
+{ \
+	bool	ret = xfs_is_ ## name(mp); \
+\
+	(mp)->m_opstate |= (1UL << XFS_OPSTATE_ ## NAME); \
+	return ret; \
+}
+
+__XFS_IS_OPSTATE(inode32, INODE32)
+
+#define __XFS_UNSUPP_OPSTATE(name) \
+static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
+{ \
+	return false; \
+}
+__XFS_UNSUPP_OPSTATE(readonly)
 
 #define LIBXFS_MOUNT_DEBUGGER		0x0001
 #define LIBXFS_MOUNT_32BITINODES	0x0002
diff --git a/libxfs/init.c b/libxfs/init.c
index b0a6d1fc..e7009a2e 100644
--- a/libxfs/init.c
+++ b/libxfs/init.c
@@ -532,10 +532,13 @@ xfs_set_inode_alloc(
 	 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter
 	 * the allocator to accommodate the request.
 	 */
-	if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
+	if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32) {
+		xfs_set_inode32(mp);
 		mp->m_flags |= XFS_MOUNT_32BITINODES;
-	else
+	} else {
+		xfs_clear_inode32(mp);
 		mp->m_flags &= ~XFS_MOUNT_32BITINODES;
+	}
 
 	for (index = 0; index < agcount; index++) {
 		struct xfs_perag	*pag;
@@ -544,7 +547,7 @@ xfs_set_inode_alloc(
 
 		pag = xfs_perag_get(mp, index);
 
-		if (mp->m_flags & XFS_MOUNT_32BITINODES) {
+		if (xfs_is_inode32(mp)) {
 			if (ino > XFS_MAXINUMBER_32) {
 				pag->pagi_inodeok = 0;
 				pag->pagf_metadata = 0;
@@ -564,7 +567,7 @@ xfs_set_inode_alloc(
 		xfs_perag_put(pag);
 	}
 
-	return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;
+	return xfs_is_inode32(mp) ? maxagi : agcount;
 }
 
 static struct xfs_buftarg *
@@ -720,6 +723,7 @@ libxfs_mount(
 
 	mp->m_finobt_nores = true;
 	mp->m_flags = (LIBXFS_MOUNT_32BITINODES|LIBXFS_MOUNT_32BITINOOPT);
+	xfs_set_inode32(mp);
 	mp->m_sb = *sb;
 	INIT_RADIX_TREE(&mp->m_perag_tree, GFP_KERNEL);
 	sbp = &(mp->m_sb);
diff --git a/libxfs/xfs_alloc.c b/libxfs/xfs_alloc.c
index b8725339..163c726f 100644
--- a/libxfs/xfs_alloc.c
+++ b/libxfs/xfs_alloc.c
@@ -3162,7 +3162,7 @@ xfs_alloc_vextent(
 		 * the first a.g. fails.
 		 */
 		if ((args->datatype & XFS_ALLOC_INITIAL_USER_DATA) &&
-		    (mp->m_flags & XFS_MOUNT_32BITINODES)) {
+		    xfs_is_inode32(mp)) {
 			args->fsbno = XFS_AGB_TO_FSB(mp,
 					((mp->m_agfrotor / rotorstep) %
 					mp->m_sb.sb_agcount), 0);
diff --git a/libxfs/xfs_sb.c b/libxfs/xfs_sb.c
index 25a4ffdb..d2de96d1 100644
--- a/libxfs/xfs_sb.c
+++ b/libxfs/xfs_sb.c
@@ -120,7 +120,7 @@ xfs_validate_sb_read(
 "Superblock has unknown read-only compatible features (0x%x) enabled.",
 			(sbp->sb_features_ro_compat &
 					XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
-		if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
+		if (!xfs_is_readonly(mp)) {
 			xfs_warn(mp,
 "Attempted to mount read-only compatible filesystem read-write.");
 			xfs_warn(mp,


  parent reply	other threads:[~2021-09-14  2:42 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-14  2:39 [PATCHSET 00/43] xfs: sync libxfs with 5.15 Darrick J. Wong
2021-09-14  2:40 ` [PATCH 01/43] xfs_{copy,db,logprint,repair}: pass xfs_mount pointers instead of xfs_sb pointers Darrick J. Wong
2021-09-14  2:40 ` [PATCH 02/43] xfs: remove support for disabling quota accounting on a mounted file system Darrick J. Wong
2021-09-14  2:40 ` [PATCH 03/43] xfs: remove the active vs running quota differentiation Darrick J. Wong
2021-09-14  2:40 ` [PATCH 04/43] xfs: replace kmem_alloc_large() with kvmalloc() Darrick J. Wong
2021-09-14  2:40 ` [PATCH 05/43] xfs: allow setting and clearing of log incompat feature flags Darrick J. Wong
2021-09-14  2:40 ` [PATCH 06/43] xfs: add attr state machine tracepoints Darrick J. Wong
2021-09-14  2:40 ` [PATCH 07/43] xfs: Rename __xfs_attr_rmtval_remove Darrick J. Wong
2021-09-14  2:40 ` [PATCH 08/43] xfs: make xfs_rtalloc_query_range input parameters const Darrick J. Wong
2021-09-14  2:40 ` [PATCH 09/43] xfs: make the key parameters to all btree key comparison functions const Darrick J. Wong
2021-09-14  2:40 ` [PATCH 10/43] xfs: make the key parameters to all btree query range " Darrick J. Wong
2021-09-14  2:41 ` [PATCH 11/43] xfs: make the record pointer passed to query_range " Darrick J. Wong
2021-09-14  2:41 ` [PATCH 12/43] xfs: mark the record passed into btree init_key functions as const Darrick J. Wong
2021-09-14  2:41 ` [PATCH 13/43] xfs: make the keys and records passed to btree inorder functions const Darrick J. Wong
2021-09-14  2:41 ` [PATCH 14/43] xfs: mark the record passed into xchk_btree functions as const Darrick J. Wong
2021-09-14  2:41 ` [PATCH 15/43] xfs: make the pointer passed to btree set_root functions const Darrick J. Wong
2021-09-14  2:41 ` [PATCH 16/43] xfs: make the start pointer passed to btree alloc_block " Darrick J. Wong
2021-09-14  2:41 ` [PATCH 17/43] xfs: make the start pointer passed to btree update_lastrec " Darrick J. Wong
2021-09-14  2:41 ` [PATCH 18/43] xfs: constify btree function parameters that are not modified Darrick J. Wong
2021-09-14  2:41 ` [PATCH 19/43] xfs: resolve fork names in trace output Darrick J. Wong
2021-09-14  2:41 ` [PATCH 20/43] xfs: sb verifier doesn't handle uncached sb buffer Darrick J. Wong
2021-09-14  2:41 ` [PATCH 21/43] xfs: rename xfs_has_attr() Darrick J. Wong
2021-09-14  2:42 ` [PATCH 22/43] xfs: rework attr2 feature and mount options Darrick J. Wong
2021-09-14  2:42 ` [PATCH 23/43] xfs: reflect sb features in xfs_mount Darrick J. Wong
2021-09-14  2:42 ` [PATCH 24/43] xfs: replace xfs_sb_version checks with feature flag checks Darrick J. Wong
2021-09-14  2:42 ` [PATCH 25/43] xfs: convert mount flags to features Darrick J. Wong
2021-09-14  2:42 ` Darrick J. Wong [this message]
2021-09-14  2:42 ` [PATCH 27/43] xfs: replace XFS_FORCED_SHUTDOWN with xfs_is_shutdown Darrick J. Wong
2021-09-14  2:42 ` [PATCH 28/43] xfs: convert xfs_fs_geometry to use mount feature checks Darrick J. Wong
2021-09-14  2:42 ` [PATCH 29/43] xfs: open code sb verifier " Darrick J. Wong
2021-09-14  2:42 ` [PATCH 30/43] xfs: convert xfs_sb_version_has checks to use mount features Darrick J. Wong
2021-09-14  2:42 ` [PATCH 31/43] libxlog: replace xfs_sb_version checks with feature flag checks Darrick J. Wong
2021-09-14  2:42 ` [PATCH 32/43] libxfs: " Darrick J. Wong
2021-09-14  2:43 ` [PATCH 33/43] xfs_{copy,db,logprint,repair}: " Darrick J. Wong
2021-09-14  2:43 ` [PATCH 34/43] xfs: remove unused xfs_sb_version_has wrappers Darrick J. Wong
2021-09-14  2:43 ` [PATCH 35/43] xfs: introduce xfs_sb_is_v5 helper Darrick J. Wong
2021-09-14  2:43 ` [PATCH 36/43] xfs: kill xfs_sb_version_has_v3inode() Darrick J. Wong
2021-09-14  2:43 ` [PATCH 37/43] libxfs: use opstate flags and functions for libxfs mount options Darrick J. Wong
2021-09-14  2:43 ` [PATCH 38/43] libxfs: remove pointless *XFS_MOUNT* flags Darrick J. Wong
2021-09-14  2:43 ` [PATCH 39/43] libxfs: always initialize internal buffer map Darrick J. Wong
2021-09-14  2:43 ` [PATCH 40/43] libxfs: replace XFS_BUF_SET_ADDR with a function Darrick J. Wong
2021-09-14  2:43 ` [PATCH 41/43] xfs: introduce xfs_buf_daddr() Darrick J. Wong
2021-09-14  2:43 ` [PATCH 42/43] xfs: convert bp->b_bn references to xfs_buf_daddr() Darrick J. Wong
2021-09-14  2:43 ` [PATCH 43/43] libxfs: rename buffer cache index variable b_bn Darrick J. Wong

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