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authorJeff Layton <jlayton@poochiereds.net>2015-11-17 06:52:23 -0500
committerJ. Bruce Fields <bfields@redhat.com>2016-01-14 17:32:51 -0500
commit6e8b50d16a757d53f8817acecba97c5d4aa1cf65 (patch)
tree1d8846d614705a8475543c575e026e87e6b3eaa8 /fs/nfsd/vfs.c
parent6b9b21073d3b250e17812cd562fffc9006962b39 (diff)
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nfsd: add new io class tracepoint
Add some new tracepoints in the nfsd read/write codepaths. The idea is that this will give us the ability to measure how long each phase of a read or write operation takes. Signed-off-by: Jeff Layton <jeff.layton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/vfs.c')
-rw-r--r--fs/nfsd/vfs.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 994d66fbb446..3257c59dc860 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -42,6 +42,7 @@
#include "nfsd.h"
#include "vfs.h"
+#include "trace.h"
#define NFSDDBG_FACILITY NFSDDBG_FILEOP
@@ -983,16 +984,23 @@ __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct raparms *ra;
__be32 err;
+ trace_read_start(rqstp, fhp, offset, vlen);
err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
if (err)
return err;
ra = nfsd_init_raparms(file);
+
+ trace_read_opened(rqstp, fhp, offset, vlen);
err = nfsd_vfs_read(rqstp, file, offset, vec, vlen, count);
+ trace_read_io_done(rqstp, fhp, offset, vlen);
+
if (ra)
nfsd_put_raparams(file, ra);
fput(file);
+ trace_read_done(rqstp, fhp, offset, vlen);
+
return err;
}
@@ -1008,24 +1016,31 @@ nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
{
__be32 err = 0;
+ trace_write_start(rqstp, fhp, offset, vlen);
+
if (file) {
err = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
NFSD_MAY_WRITE|NFSD_MAY_OWNER_OVERRIDE);
if (err)
goto out;
+ trace_write_opened(rqstp, fhp, offset, vlen);
err = nfsd_vfs_write(rqstp, fhp, file, offset, vec, vlen, cnt,
stablep);
+ trace_write_io_done(rqstp, fhp, offset, vlen);
} else {
err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_WRITE, &file);
if (err)
goto out;
+ trace_write_opened(rqstp, fhp, offset, vlen);
if (cnt)
err = nfsd_vfs_write(rqstp, fhp, file, offset, vec, vlen,
cnt, stablep);
+ trace_write_io_done(rqstp, fhp, offset, vlen);
fput(file);
}
out:
+ trace_write_done(rqstp, fhp, offset, vlen);
return err;
}