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NFSD: Separate tracepoints for acquire and create 

These tracepoints collect different information: the create case does
not open a file, so there's no nf_file available.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2022-07-08 14:26:43 -04:00
parent 0ec8e9d153
commit be0230069f
3 changed files with 52 additions and 12 deletions
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9
fs/nfsd/filecache.c
View File

@ -1040,7 +1040,7 @@ nfsd_file_is_cached(struct inode *inode)
}
static __be32
nfsd_do_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned int may_flags, struct nfsd_file **pnf, bool open)
{
struct nfsd_file_lookup_key key = {
@ -1121,7 +1121,8 @@ out:
out_status:
put_cred(key.cred);
trace_nfsd_file_acquire(rqstp, key.inode, may_flags, nf, status);
if (open)
trace_nfsd_file_acquire(rqstp, key.inode, may_flags, nf, status);
return status;
open_file:
@ -1169,7 +1170,7 @@ __be32
nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned int may_flags, struct nfsd_file **pnf)
{
return nfsd_do_file_acquire(rqstp, fhp, may_flags, pnf, true);
return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, true);
}
/**
@ -1186,7 +1187,7 @@ __be32
nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned int may_flags, struct nfsd_file **pnf)
{
return nfsd_do_file_acquire(rqstp, fhp, may_flags, pnf, false);
return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, false);
}
/*

1
fs/nfsd/nfs4state.c
View File

@ -5104,6 +5104,7 @@ static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
goto out_put_access;
nf->nf_file = open->op_filp;
open->op_filp = NULL;
trace_nfsd_file_create(rqstp, access, nf);
}
spin_lock(&fp->fi_lock);

54
fs/nfsd/trace.h
View File

@ -782,10 +782,10 @@ DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash_and_dispose);
TRACE_EVENT(nfsd_file_acquire,
TP_PROTO(
struct svc_rqst *rqstp,
struct inode *inode,
const struct svc_rqst *rqstp,
const struct inode *inode,
unsigned int may_flags,
struct nfsd_file *nf,
const struct nfsd_file *nf,
__be32 status
),
@ -793,12 +793,12 @@ TRACE_EVENT(nfsd_file_acquire,
TP_STRUCT__entry(
__field(u32, xid)
__field(void *, inode)
__field(const void *, inode)
__field(unsigned long, may_flags)
__field(int, nf_ref)
__field(unsigned int, nf_ref)
__field(unsigned long, nf_flags)
__field(unsigned long, nf_may)
__field(struct file *, nf_file)
__field(const void *, nf_file)
__field(u32, status)
),
@ -813,12 +813,50 @@ TRACE_EVENT(nfsd_file_acquire,
__entry->status = be32_to_cpu(status);
),
TP_printk("xid=0x%x inode=%p may_flags=%s ref=%d nf_flags=%s nf_may=%s nf_file=%p status=%u",
TP_printk("xid=0x%x inode=%p may_flags=%s ref=%u nf_flags=%s nf_may=%s nf_file=%p status=%u",
__entry->xid, __entry->inode,
show_nfsd_may_flags(__entry->may_flags),
__entry->nf_ref, show_nf_flags(__entry->nf_flags),
show_nfsd_may_flags(__entry->nf_may),
__entry->nf_file, __entry->status)
__entry->nf_file, __entry->status
)
);
TRACE_EVENT(nfsd_file_create,
TP_PROTO(
const struct svc_rqst *rqstp,
unsigned int may_flags,
const struct nfsd_file *nf
),
TP_ARGS(rqstp, may_flags, nf),
TP_STRUCT__entry(
__field(const void *, nf_inode)
__field(const void *, nf_file)
__field(unsigned long, may_flags)
__field(unsigned long, nf_flags)
__field(unsigned long, nf_may)
__field(unsigned int, nf_ref)
__field(u32, xid)
),
TP_fast_assign(
__entry->nf_inode = nf->nf_inode;
__entry->nf_file = nf->nf_file;
__entry->may_flags = may_flags;
__entry->nf_flags = nf->nf_flags;
__entry->nf_may = nf->nf_may;
__entry->nf_ref = refcount_read(&nf->nf_ref);
__entry->xid = be32_to_cpu(rqstp->rq_xid);
),
TP_printk("xid=0x%x inode=%p may_flags=%s ref=%u nf_flags=%s nf_may=%s nf_file=%p",
__entry->xid, __entry->nf_inode,
show_nfsd_may_flags(__entry->may_flags),
__entry->nf_ref, show_nf_flags(__entry->nf_flags),
show_nfsd_may_flags(__entry->nf_may), __entry->nf_file
)
);
TRACE_EVENT(nfsd_file_insert_err,