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Message-ID: <b840d1e24b91e40e83c1273d780f88a9f0220e29.camel@hammerspace.com> Date: Mon, 7 Apr 2025 14:35:20 +0000 From: Trond Myklebust <trondmy@...merspace.com> To: "anna@...nel.org" <anna@...nel.org>, "jlayton@...nel.org" <jlayton@...nel.org> CC: "linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] nfs: don't negate the op_status in nfs4_flexfiles_io_event tracepoints On Mon, 2025-04-07 at 10:24 -0400, Jeff Layton wrote: > In particular, doing this makes NFS4ERR_NXIO look like -ENXIO when > the tracepoints fire. > > Signed-off-by: Jeff Layton <jlayton@...nel.org> > --- > fs/nfs/nfs4trace.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h > index > bc67fe6801b138204641319ecaf1115aac76af62..eb7d625d45e83f025ef96952660 > dded85aa0ca89 100644 > --- a/fs/nfs/nfs4trace.h > +++ b/fs/nfs/nfs4trace.h > @@ -2089,7 +2089,7 @@ DECLARE_EVENT_CLASS(nfs4_flexfiles_io_event, > TP_printk( > "error=%ld (%s) fileid=%02x:%02x:%llu > fhandle=0x%08x " > "offset=%llu count=%u stateid=%d:0x%08x > dstaddr=%s", > - -__entry->error, > + __entry->error, > show_nfs4_status(__entry->error), > MAJOR(__entry->dev), MINOR(__entry->dev), > (unsigned long long)__entry->fileid, > Hmm... I've been getting tired of not having the RPC level errors in the above, so I was actually thinking of changing those tracepoints to something more like this. 8<-------------------------------------------------------------------- From ee1c801410b2649b2a1c71e0fb5fe1b16fd20e86 Mon Sep 17 00:00:00 2001 Message-ID: <ee1c801410b2649b2a1c71e0fb5fe1b16fd20e86.1744036227.git.trond.myklebust@...merspace.com> From: Trond Myklebust <trond.myklebust@...merspace.com> Date: Mon, 7 Apr 2025 14:36:41 +0200 Subject: [PATCH] pNFS/flexfiles: Record the RPC errors in the I/O tracepoints When debugging I/O issues, we want to see not just the NFS level errors, but also the RPC level problems, so record both in the tracepoints. Signed-off-by: Trond Myklebust <trond.myklebust@...merspace.com> --- fs/nfs/flexfilelayout/flexfilelayout.c | 6 ++--- fs/nfs/nfs4trace.h | 34 +++++++++++++++++--------- 2 files changed, 25 insertions(+), 15 deletions(-) diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 61ad269c825f..e6909cafab68 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -1329,7 +1329,7 @@ static int ff_layout_read_done_cb(struct rpc_task *task, hdr->args.offset, hdr->args.count, &hdr->res.op_status, OP_READ, task->tk_status); - trace_ff_layout_read_error(hdr); + trace_ff_layout_read_error(hdr, task->tk_status); } err = ff_layout_async_handle_error(task, hdr->args.context->state, @@ -1502,7 +1502,7 @@ static int ff_layout_write_done_cb(struct rpc_task *task, hdr->args.offset, hdr->args.count, &hdr->res.op_status, OP_WRITE, task->tk_status); - trace_ff_layout_write_error(hdr); + trace_ff_layout_write_error(hdr, task->tk_status); } err = ff_layout_async_handle_error(task, hdr->args.context->state, @@ -1551,7 +1551,7 @@ static int ff_layout_commit_done_cb(struct rpc_task *task, data->args.offset, data->args.count, &data->res.op_status, OP_COMMIT, task->tk_status); - trace_ff_layout_commit_error(data); + trace_ff_layout_commit_error(data, task->tk_status); } err = ff_layout_async_handle_error(task, NULL, data->ds_clp, diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index bc67fe6801b1..deab4c0e21a0 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -2051,13 +2051,15 @@ TRACE_EVENT(fl_getdevinfo, DECLARE_EVENT_CLASS(nfs4_flexfiles_io_event, TP_PROTO( - const struct nfs_pgio_header *hdr + const struct nfs_pgio_header *hdr, + int error ), - TP_ARGS(hdr), + TP_ARGS(hdr, error), TP_STRUCT__entry( __field(unsigned long, error) + __field(unsigned long, nfs_error) __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) @@ -2073,7 +2075,8 @@ DECLARE_EVENT_CLASS(nfs4_flexfiles_io_event, TP_fast_assign( const struct inode *inode = hdr->inode; - __entry->error = hdr->res.op_status; + __entry->error = -error; + __entry->nfs_error = hdr->res.op_status; __entry->fhandle = nfs_fhandle_hash(hdr->args.fh); __entry->fileid = NFS_FILEID(inode); __entry->dev = inode->i_sb->s_dev; @@ -2088,7 +2091,8 @@ DECLARE_EVENT_CLASS(nfs4_flexfiles_io_event, TP_printk( "error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%llu count=%u stateid=%d:0x%08x dstaddr=%s", + "offset=%llu count=%u stateid=%d:0x%08x dstaddr=%s " + "nfs_error=%lu (%s)", -__entry->error, show_nfs4_status(__entry->error), MAJOR(__entry->dev), MINOR(__entry->dev), @@ -2096,28 +2100,32 @@ DECLARE_EVENT_CLASS(nfs4_flexfiles_io_event, __entry->fhandle, __entry->offset, __entry->count, __entry->stateid_seq, __entry->stateid_hash, - __get_str(dstaddr) + __get_str(dstaddr), __entry->nfs_error, + show_nfs4_status(__entry->nfs_error) ) ); #define DEFINE_NFS4_FLEXFILES_IO_EVENT(name) \ DEFINE_EVENT(nfs4_flexfiles_io_event, name, \ TP_PROTO( \ - const struct nfs_pgio_header *hdr \ + const struct nfs_pgio_header *hdr, \ + int error \ ), \ - TP_ARGS(hdr)) + TP_ARGS(hdr, error)) DEFINE_NFS4_FLEXFILES_IO_EVENT(ff_layout_read_error); DEFINE_NFS4_FLEXFILES_IO_EVENT(ff_layout_write_error); TRACE_EVENT(ff_layout_commit_error, TP_PROTO( - const struct nfs_commit_data *data + const struct nfs_commit_data *data, + int error ), - TP_ARGS(data), + TP_ARGS(data, error), TP_STRUCT__entry( __field(unsigned long, error) + __field(unsigned long, nfs_error) __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) @@ -2131,7 +2139,8 @@ TRACE_EVENT(ff_layout_commit_error, TP_fast_assign( const struct inode *inode = data->inode; - __entry->error = data->res.op_status; + __entry->error = -error; + __entry->nfs_error = data->res.op_status; __entry->fhandle = nfs_fhandle_hash(data->args.fh); __entry->fileid = NFS_FILEID(inode); __entry->dev = inode->i_sb->s_dev; @@ -2142,14 +2151,15 @@ TRACE_EVENT(ff_layout_commit_error, TP_printk( "error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%llu count=%u dstaddr=%s", + "offset=%llu count=%u dstaddr=%s nfs_error=%lu (%s)", -__entry->error, show_nfs4_status(__entry->error), MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, __entry->offset, __entry->count, - __get_str(dstaddr) + __get_str(dstaddr), __entry->nfs_error, + show_nfs4_status(__entry->nfs_error) ) ); -- 2.49.0 -- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@...merspace.com
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