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Bruce Fields" Cc: linux-nfs@vger.kernel.org Subject: [PATCH v2 07/10] nfsd: Add a tracepoint for errors in nfsd4_clone_file_range() Date: Sat, 18 Dec 2021 20:38:00 -0500 Message-Id: <20211219013803.324724-8-trondmy@kernel.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211219013803.324724-7-trondmy@kernel.org> References: <20211219013803.324724-1-trondmy@kernel.org> <20211219013803.324724-2-trondmy@kernel.org> <20211219013803.324724-3-trondmy@kernel.org> <20211219013803.324724-4-trondmy@kernel.org> <20211219013803.324724-5-trondmy@kernel.org> <20211219013803.324724-6-trondmy@kernel.org> <20211219013803.324724-7-trondmy@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Trond Myklebust Since a clone error commit can cause the boot verifier to change, we should trace those errors. Signed-off-by: Trond Myklebust --- fs/nfsd/nfs4proc.c | 2 +- fs/nfsd/trace.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++ fs/nfsd/vfs.c | 18 +++++++++++++++-- fs/nfsd/vfs.h | 3 ++- 4 files changed, 69 insertions(+), 4 deletions(-) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index a36261f89bdf..35f33959a083 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1101,7 +1101,7 @@ nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (status) goto out; - status = nfsd4_clone_file_range(src, clone->cl_src_pos, + status = nfsd4_clone_file_range(rqstp, src, clone->cl_src_pos, dst, clone->cl_dst_pos, clone->cl_count, EX_ISSYNC(cstate->current_fh.fh_export)); diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index f1e0d3c51bc2..001444d9829d 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -413,6 +413,56 @@ TRACE_EVENT(nfsd_dirent, ) ) +DECLARE_EVENT_CLASS(nfsd_copy_err_class, + TP_PROTO(struct svc_rqst *rqstp, + struct svc_fh *src_fhp, + loff_t src_offset, + struct svc_fh *dst_fhp, + loff_t dst_offset, + u64 count, + int status), + TP_ARGS(rqstp, src_fhp, src_offset, dst_fhp, dst_offset, count, status), + TP_STRUCT__entry( + __field(u32, xid) + __field(u32, src_fh_hash) + __field(loff_t, src_offset) + __field(u32, dst_fh_hash) + __field(loff_t, dst_offset) + __field(u64, count) + __field(int, status) + ), + TP_fast_assign( + __entry->xid = be32_to_cpu(rqstp->rq_xid); + __entry->src_fh_hash = knfsd_fh_hash(&src_fhp->fh_handle); + __entry->src_offset = src_offset; + __entry->dst_fh_hash = knfsd_fh_hash(&dst_fhp->fh_handle); + __entry->dst_offset = dst_offset; + __entry->count = count; + __entry->status = status; + ), + TP_printk("xid=0x%08x src_fh_hash=0x%08x src_offset=%lld " + "dst_fh_hash=0x%08x dst_offset=%lld " + "count=%llu status=%d", + __entry->xid, __entry->src_fh_hash, __entry->src_offset, + __entry->dst_fh_hash, __entry->dst_offset, + (unsigned long long)__entry->count, + __entry->status) +) + +#define DEFINE_NFSD_COPY_ERR_EVENT(name) \ +DEFINE_EVENT(nfsd_copy_err_class, nfsd_##name, \ + TP_PROTO(struct svc_rqst *rqstp, \ + struct svc_fh *src_fhp, \ + loff_t src_offset, \ + struct svc_fh *dst_fhp, \ + loff_t dst_offset, \ + u64 count, \ + int status), \ + TP_ARGS(rqstp, src_fhp, src_offset, dst_fhp, dst_offset, \ + count, status)) + +DEFINE_NFSD_COPY_ERR_EVENT(clone_file_range_err); + #include "state.h" #include "filecache.h" #include "vfs.h" diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 85e579aa6944..4d2964d08097 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -40,6 +40,7 @@ #include "../internal.h" #include "acl.h" #include "idmap.h" +#include "xdr4.h" #endif /* CONFIG_NFSD_V4 */ #include "nfsd.h" @@ -517,8 +518,15 @@ __be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp, } #endif -__be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos, - struct nfsd_file *nf_dst, u64 dst_pos, u64 count, bool sync) +static struct nfsd4_compound_state *nfsd4_get_cstate(struct svc_rqst *rqstp) +{ + return &((struct nfsd4_compoundres *)rqstp->rq_resp)->cstate; +} + +__be32 nfsd4_clone_file_range(struct svc_rqst *rqstp, + struct nfsd_file *nf_src, u64 src_pos, + struct nfsd_file *nf_dst, u64 dst_pos, + u64 count, bool sync) { struct file *src = nf_src->nf_file; struct file *dst = nf_dst->nf_file; @@ -542,6 +550,12 @@ __be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos, if (!status) status = commit_inode_metadata(file_inode(src)); if (status < 0) { + trace_nfsd_clone_file_range_err(rqstp, + &nfsd4_get_cstate(rqstp)->save_fh, + src_pos, + &nfsd4_get_cstate(rqstp)->current_fh, + dst_pos, + count, status); nfsd_reset_boot_verifier(net_generic(nf_dst->nf_net, nfsd_net_id)); ret = nfserrno(status); diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index 6edae1b9a96e..3dba6397d452 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -57,7 +57,8 @@ __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *, struct xdr_netobj *); __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, struct file *, loff_t, loff_t, int); -__be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos, +__be32 nfsd4_clone_file_range(struct svc_rqst *, + struct nfsd_file *nf_src, u64 src_pos, struct nfsd_file *nf_dst, u64 dst_pos, u64 count, bool sync); #endif /* CONFIG_NFSD_V4 */ -- 2.33.1