mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 04:34:08 +08:00
nfsd: Add I/O trace points in the NFSv4 write path
NFSv4 write compound processing invokes nfsd_vfs_write directly. The trace points currently in nfsd_write are not effective for NFSv4 writes. Move the trace points into the shared nfsd_vfs_write() helper. After the I/O, we also want to record any local I/O error that might have occurred, and the total count of bytes that were actually moved (rather than the requested number). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
parent
f394b62b7b
commit
d890be159a
@ -1001,6 +1001,9 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
|
||||
if (write->wr_offset >= OFFSET_MAX)
|
||||
return nfserr_inval;
|
||||
|
||||
cnt = write->wr_buflen;
|
||||
trace_nfsd_write_start(rqstp, &cstate->current_fh,
|
||||
write->wr_offset, cnt);
|
||||
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
|
||||
stateid, WR_STATE, &filp, NULL);
|
||||
if (status) {
|
||||
@ -1008,7 +1011,6 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
|
||||
return status;
|
||||
}
|
||||
|
||||
cnt = write->wr_buflen;
|
||||
write->wr_how_written = write->wr_stable_how;
|
||||
gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
|
||||
|
||||
@ -1021,7 +1023,8 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
|
||||
fput(filp);
|
||||
|
||||
write->wr_bytes_written = cnt;
|
||||
|
||||
trace_nfsd_write_done(rqstp, &cstate->current_fh,
|
||||
write->wr_offset, cnt);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
@ -51,6 +51,39 @@ DEFINE_NFSD_IO_EVENT(write_opened);
|
||||
DEFINE_NFSD_IO_EVENT(write_io_done);
|
||||
DEFINE_NFSD_IO_EVENT(write_done);
|
||||
|
||||
DECLARE_EVENT_CLASS(nfsd_err_class,
|
||||
TP_PROTO(struct svc_rqst *rqstp,
|
||||
struct svc_fh *fhp,
|
||||
loff_t offset,
|
||||
int status),
|
||||
TP_ARGS(rqstp, fhp, offset, status),
|
||||
TP_STRUCT__entry(
|
||||
__field(u32, xid)
|
||||
__field(u32, fh_hash)
|
||||
__field(loff_t, offset)
|
||||
__field(int, status)
|
||||
),
|
||||
TP_fast_assign(
|
||||
__entry->xid = be32_to_cpu(rqstp->rq_xid);
|
||||
__entry->fh_hash = knfsd_fh_hash(&fhp->fh_handle);
|
||||
__entry->offset = offset;
|
||||
__entry->status = status;
|
||||
),
|
||||
TP_printk("xid=0x%08x fh_hash=0x%08x offset=%lld status=%d",
|
||||
__entry->xid, __entry->fh_hash,
|
||||
__entry->offset, __entry->status)
|
||||
)
|
||||
|
||||
#define DEFINE_NFSD_ERR_EVENT(name) \
|
||||
DEFINE_EVENT(nfsd_err_class, nfsd_##name, \
|
||||
TP_PROTO(struct svc_rqst *rqstp, \
|
||||
struct svc_fh *fhp, \
|
||||
loff_t offset, \
|
||||
int len), \
|
||||
TP_ARGS(rqstp, fhp, offset, len))
|
||||
|
||||
DEFINE_NFSD_ERR_EVENT(write_err);
|
||||
|
||||
#include "state.h"
|
||||
|
||||
DECLARE_EVENT_CLASS(nfsd_stateid_class,
|
||||
|
@ -965,13 +965,15 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
|
||||
{
|
||||
struct svc_export *exp;
|
||||
struct iov_iter iter;
|
||||
__be32 err = 0;
|
||||
__be32 nfserr;
|
||||
int host_err;
|
||||
int use_wgather;
|
||||
loff_t pos = offset;
|
||||
unsigned int pflags = current->flags;
|
||||
rwf_t flags = 0;
|
||||
|
||||
trace_nfsd_write_opened(rqstp, fhp, offset, *cnt);
|
||||
|
||||
if (test_bit(RQ_LOCAL, &rqstp->rq_flags))
|
||||
/*
|
||||
* We want less throttling in balance_dirty_pages()
|
||||
@ -994,22 +996,23 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
|
||||
host_err = vfs_iter_write(file, &iter, &pos, flags);
|
||||
if (host_err < 0)
|
||||
goto out_nfserr;
|
||||
*cnt = host_err;
|
||||
nfsdstats.io_write += host_err;
|
||||
nfsdstats.io_write += *cnt;
|
||||
fsnotify_modify(file);
|
||||
|
||||
if (stable && use_wgather)
|
||||
host_err = wait_for_concurrent_writes(file);
|
||||
|
||||
out_nfserr:
|
||||
dprintk("nfsd: write complete host_err=%d\n", host_err);
|
||||
if (host_err >= 0)
|
||||
err = 0;
|
||||
else
|
||||
err = nfserrno(host_err);
|
||||
if (host_err >= 0) {
|
||||
trace_nfsd_write_io_done(rqstp, fhp, offset, *cnt);
|
||||
nfserr = nfs_ok;
|
||||
} else {
|
||||
trace_nfsd_write_err(rqstp, fhp, offset, host_err);
|
||||
nfserr = nfserrno(host_err);
|
||||
}
|
||||
if (test_bit(RQ_LOCAL, &rqstp->rq_flags))
|
||||
current_restore_flags(pflags, PF_LESS_THROTTLE);
|
||||
return err;
|
||||
return nfserr;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -1067,9 +1070,7 @@ nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset,
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
trace_nfsd_write_opened(rqstp, fhp, offset, *cnt);
|
||||
err = nfsd_vfs_write(rqstp, fhp, file, offset, vec, vlen, cnt, stable);
|
||||
trace_nfsd_write_io_done(rqstp, fhp, offset, *cnt);
|
||||
fput(file);
|
||||
out:
|
||||
trace_nfsd_write_done(rqstp, fhp, offset, *cnt);
|
||||
|
Loading…
Reference in New Issue
Block a user