From f4848303ce125999886535323a64db26dba68293 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 26 Dec 2015 18:03:07 -0500 Subject: [PATCH] pNFS: Modify pnfs_update_layout tracepoints to use layout stateid Instead of displaying a layout segment pointer in these tracepoints, let's use the layout stateid, now that Olga gave us a set of tools for displaying them. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4trace.c | 1 + fs/nfs/nfs4trace.h | 23 +++++++++++++++++------ fs/nfs/pnfs.c | 20 ++++++++++---------- 3 files changed, 28 insertions(+), 16 deletions(-) diff --git a/fs/nfs/nfs4trace.c b/fs/nfs/nfs4trace.c index d774335cc8bc..2850bce19244 100644 --- a/fs/nfs/nfs4trace.c +++ b/fs/nfs/nfs4trace.c @@ -6,6 +6,7 @@ #include "internal.h" #include "nfs4session.h" #include "callback.h" +#include "pnfs.h" #define CREATE_TRACE_POINTS #include "nfs4trace.h" diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index 238925c1aafd..d08d0c84b778 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -1461,10 +1461,10 @@ TRACE_EVENT(pnfs_update_layout, loff_t pos, u64 count, enum pnfs_iomode iomode, - struct pnfs_layout_segment *lseg, + struct pnfs_layout_hdr *lo, enum pnfs_update_layout_reason reason ), - TP_ARGS(inode, pos, count, iomode, lseg, reason), + TP_ARGS(inode, pos, count, iomode, lo, reason), TP_STRUCT__entry( __field(dev_t, dev) __field(u64, fileid) @@ -1472,7 +1472,8 @@ TRACE_EVENT(pnfs_update_layout, __field(loff_t, pos) __field(u64, count) __field(enum pnfs_iomode, iomode) - __field(struct pnfs_layout_segment *, lseg) + __field(int, layoutstateid_seq) + __field(u32, layoutstateid_hash) __field(enum pnfs_update_layout_reason, reason) ), TP_fast_assign( @@ -1482,18 +1483,28 @@ TRACE_EVENT(pnfs_update_layout, __entry->pos = pos; __entry->count = count; __entry->iomode = iomode; - __entry->lseg = lseg; __entry->reason = reason; + if (lo != NULL) { + __entry->layoutstateid_seq = + be32_to_cpu(lo->plh_stateid.seqid); + __entry->layoutstateid_hash = + nfs_stateid_hash(&lo->plh_stateid); + } else { + __entry->layoutstateid_seq = 0; + __entry->layoutstateid_hash = 0; + } ), TP_printk( "fileid=%02x:%02x:%llu fhandle=0x%08x " - "iomode=%s pos=%llu count=%llu lseg=%p (%s)", + "iomode=%s pos=%llu count=%llu " + "layoutstateid=%d:0x%08x (%s)", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long long)__entry->fileid, __entry->fhandle, show_pnfs_iomode(__entry->iomode), (unsigned long long)__entry->pos, - (unsigned long long)__entry->count, __entry->lseg, + (unsigned long long)__entry->count, + __entry->layoutstateid_seq, __entry->layoutstateid_hash, show_pnfs_update_layout_reason(__entry->reason) ) ); diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 1489065bb051..6095a8d42766 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1521,19 +1521,19 @@ pnfs_update_layout(struct inode *ino, bool first; if (!pnfs_enabled_sb(NFS_SERVER(ino))) { - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, NULL, PNFS_UPDATE_LAYOUT_NO_PNFS); goto out; } if (iomode == IOMODE_READ && i_size_read(ino) == 0) { - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, NULL, PNFS_UPDATE_LAYOUT_RD_ZEROLEN); goto out; } if (pnfs_within_mdsthreshold(ctx, ino, iomode)) { - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, NULL, PNFS_UPDATE_LAYOUT_MDSTHRESH); goto out; } @@ -1544,14 +1544,14 @@ lookup_again: lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); if (lo == NULL) { spin_unlock(&ino->i_lock); - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, NULL, PNFS_UPDATE_LAYOUT_NOMEM); goto out; } /* Do we even need to bother with this? */ if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, lo, PNFS_UPDATE_LAYOUT_BULK_RECALL); dprintk("%s matches recall, use MDS\n", __func__); goto out_unlock; @@ -1560,7 +1560,7 @@ lookup_again: /* if LAYOUTGET already failed once we don't try again */ if (pnfs_layout_io_test_failed(lo, iomode) && !pnfs_should_retry_layoutget(lo)) { - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, lo, PNFS_UPDATE_LAYOUT_IO_TEST_FAIL); goto out_unlock; } @@ -1584,7 +1584,7 @@ lookup_again: */ lseg = pnfs_find_lseg(lo, &arg); if (lseg) { - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, lo, PNFS_UPDATE_LAYOUT_FOUND_CACHED); goto out_unlock; } @@ -1604,13 +1604,13 @@ lookup_again: dprintk("%s retrying\n", __func__); goto lookup_again; } - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, lo, PNFS_UPDATE_LAYOUT_RETURN); goto out_put_layout_hdr; } if (pnfs_layoutgets_blocked(lo)) { - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, lo, PNFS_UPDATE_LAYOUT_BLOCKED); goto out_unlock; } @@ -1638,7 +1638,7 @@ lookup_again: lseg = send_layoutget(lo, ctx, &arg, gfp_flags); pnfs_clear_retry_layoutget(lo); atomic_dec(&lo->plh_outstanding); - trace_pnfs_update_layout(ino, pos, count, iomode, lseg, + trace_pnfs_update_layout(ino, pos, count, iomode, lo, PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET); out_put_layout_hdr: if (first) -- 2.20.1