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Tue, 27 Jul 2021 06:21:10 +0000 From: Allison Henderson To: linux-xfs@vger.kernel.org Subject: [PATCH v22 05/16] xfs: Add state machine tracepoints Date: Mon, 26 Jul 2021 23:20:42 -0700 Message-Id: <20210727062053.11129-6-allison.henderson@oracle.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210727062053.11129-1-allison.henderson@oracle.com> References: <20210727062053.11129-1-allison.henderson@oracle.com> Content-Type: text/plain X-ClientProxiedBy: SJ0PR05CA0191.namprd05.prod.outlook.com (2603:10b6:a03:330::16) To BY5PR10MB4306.namprd10.prod.outlook.com (2603:10b6:a03:211::7) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (67.1.112.125) by SJ0PR05CA0191.namprd05.prod.outlook.com (2603:10b6:a03:330::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4373.7 via Frontend Transport; Tue, 27 Jul 2021 06:21:09 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 81ab8ff3-198a-4082-f88c-08d950c6b9a1 X-MS-TrafficTypeDiagnostic: SJ0PR10MB4669: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1332; 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We use these to track when ever a new state is set or -EAGAIN is returned Signed-off-by: Allison Henderson Reviewed-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_attr.c | 28 ++++++++++++++++++++++++++-- fs/xfs/libxfs/xfs_attr_remote.c | 1 + fs/xfs/xfs_trace.h | 24 ++++++++++++++++++++++++ 3 files changed, 51 insertions(+), 2 deletions(-) diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c index 5040fc1..b0c6c62 100644 --- a/fs/xfs/libxfs/xfs_attr.c +++ b/fs/xfs/libxfs/xfs_attr.c @@ -335,6 +335,7 @@ xfs_attr_sf_addname( * the attr fork to leaf format and will restart with the leaf * add. */ + trace_xfs_attr_sf_addname_return(XFS_DAS_UNINIT, args->dp); dac->flags |= XFS_DAC_DEFER_FINISH; return -EAGAIN; } @@ -394,6 +395,8 @@ xfs_attr_set_iter( * handling code below */ dac->flags |= XFS_DAC_DEFER_FINISH; + trace_xfs_attr_set_iter_return( + dac->dela_state, args->dp); return -EAGAIN; } else if (error) { return error; @@ -418,6 +421,7 @@ xfs_attr_set_iter( dac->dela_state = XFS_DAS_FOUND_NBLK; } + trace_xfs_attr_set_iter_return(dac->dela_state, args->dp); return -EAGAIN; case XFS_DAS_FOUND_LBLK: /* @@ -445,6 +449,8 @@ xfs_attr_set_iter( error = xfs_attr_rmtval_set_blk(dac); if (error) return error; + trace_xfs_attr_set_iter_return(dac->dela_state, + args->dp); return -EAGAIN; } @@ -479,6 +485,7 @@ xfs_attr_set_iter( * series. */ dac->dela_state = XFS_DAS_FLIP_LFLAG; + trace_xfs_attr_set_iter_return(dac->dela_state, args->dp); return -EAGAIN; case XFS_DAS_FLIP_LFLAG: /* @@ -496,6 +503,9 @@ xfs_attr_set_iter( dac->dela_state = XFS_DAS_RM_LBLK; if (args->rmtblkno) { error = __xfs_attr_rmtval_remove(dac); + if (error == -EAGAIN) + trace_xfs_attr_set_iter_return( + dac->dela_state, args->dp); if (error) return error; @@ -549,6 +559,8 @@ xfs_attr_set_iter( error = xfs_attr_rmtval_set_blk(dac); if (error) return error; + trace_xfs_attr_set_iter_return( + dac->dela_state, args->dp); return -EAGAIN; } @@ -584,6 +596,7 @@ xfs_attr_set_iter( * series */ dac->dela_state = XFS_DAS_FLIP_NFLAG; + trace_xfs_attr_set_iter_return(dac->dela_state, args->dp); return -EAGAIN; case XFS_DAS_FLIP_NFLAG: @@ -603,6 +616,10 @@ xfs_attr_set_iter( dac->dela_state = XFS_DAS_RM_NBLK; if (args->rmtblkno) { error = __xfs_attr_rmtval_remove(dac); + if (error == -EAGAIN) + trace_xfs_attr_set_iter_return( + dac->dela_state, args->dp); + if (error) return error; @@ -1183,6 +1200,8 @@ xfs_attr_node_addname( * this point. */ dac->flags |= XFS_DAC_DEFER_FINISH; + trace_xfs_attr_node_addname_return( + dac->dela_state, args->dp); return -EAGAIN; } @@ -1429,10 +1448,13 @@ xfs_attr_remove_iter( * blocks are removed. */ error = __xfs_attr_rmtval_remove(dac); - if (error == -EAGAIN) + if (error == -EAGAIN) { + trace_xfs_attr_remove_iter_return( + dac->dela_state, args->dp); return error; - else if (error) + } else if (error) { goto out; + } /* * Refill the state structure with buffers (the prior @@ -1473,6 +1495,8 @@ xfs_attr_remove_iter( dac->flags |= XFS_DAC_DEFER_FINISH; dac->dela_state = XFS_DAS_RM_SHRINK; + trace_xfs_attr_remove_iter_return( + dac->dela_state, args->dp); return -EAGAIN; } diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c index 0c8bee3..70f880d 100644 --- a/fs/xfs/libxfs/xfs_attr_remote.c +++ b/fs/xfs/libxfs/xfs_attr_remote.c @@ -696,6 +696,7 @@ __xfs_attr_rmtval_remove( */ if (!done) { dac->flags |= XFS_DAC_DEFER_FINISH; + trace_xfs_attr_rmtval_remove_return(dac->dela_state, args->dp); return -EAGAIN; } diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index f9d8d60..f9840dd 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -3987,6 +3987,30 @@ DEFINE_ICLOG_EVENT(xlog_iclog_want_sync); DEFINE_ICLOG_EVENT(xlog_iclog_wait_on); DEFINE_ICLOG_EVENT(xlog_iclog_write); +DECLARE_EVENT_CLASS(xfs_das_state_class, + TP_PROTO(int das, struct xfs_inode *ip), + TP_ARGS(das, ip), + TP_STRUCT__entry( + __field(int, das) + __field(xfs_ino_t, ino) + ), + TP_fast_assign( + __entry->das = das; + __entry->ino = ip->i_ino; + ), + TP_printk("state change %d ino 0x%llx", + __entry->das, __entry->ino) +) + +#define DEFINE_DAS_STATE_EVENT(name) \ +DEFINE_EVENT(xfs_das_state_class, name, \ + TP_PROTO(int das, struct xfs_inode *ip), \ + TP_ARGS(das, ip)) +DEFINE_DAS_STATE_EVENT(xfs_attr_sf_addname_return); +DEFINE_DAS_STATE_EVENT(xfs_attr_set_iter_return); +DEFINE_DAS_STATE_EVENT(xfs_attr_node_addname_return); +DEFINE_DAS_STATE_EVENT(xfs_attr_remove_iter_return); +DEFINE_DAS_STATE_EVENT(xfs_attr_rmtval_remove_return); #endif /* _TRACE_XFS_H */ #undef TRACE_INCLUDE_PATH -- 2.7.4