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nfs: add tracepoints to nfs_file_read() and nfs_file_write()

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Add some tracepoints to the I/O submission codepaths.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
This commit is contained in:
Jeff Layton 2025-08-08 07:40:31 -04:00 committed by Anna Schumaker
parent 07e27ad163
commit 4b62f0e448
2 changed files with 56 additions and 0 deletions
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4
fs/nfs/file.c
View File

@ -161,6 +161,8 @@ nfs_file_read(struct kiocb *iocb, struct iov_iter *to)
struct inode *inode = file_inode(iocb->ki_filp);
ssize_t result;
trace_nfs_file_read(iocb, to);
if (iocb->ki_flags & IOCB_DIRECT)
return nfs_file_direct_read(iocb, to, false);
@ -690,6 +692,8 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
errseq_t since;
int error;
trace_nfs_file_write(iocb, from);
result = nfs_key_timeout_notify(file, inode);
if (result)
return result;

52
fs/nfs/nfstrace.h
View File

@ -1051,6 +1051,58 @@ DEFINE_NFS_FOLIO_EVENT_DONE(nfs_writeback_folio_done);
DEFINE_NFS_FOLIO_EVENT(nfs_invalidate_folio);
DEFINE_NFS_FOLIO_EVENT_DONE(nfs_launder_folio_done);
DECLARE_EVENT_CLASS(nfs_kiocb_event,
TP_PROTO(
const struct kiocb *iocb,
const struct iov_iter *iter
),
TP_ARGS(iocb, iter),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
__field(u64, version)
__field(loff_t, offset)
__field(size_t, count)
__field(int, flags)
),
TP_fast_assign(
const struct inode *inode = file_inode(iocb->ki_filp);
const struct nfs_inode *nfsi = NFS_I(inode);
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
__entry->version = inode_peek_iversion_raw(inode);
__entry->offset = iocb->ki_pos;
__entry->count = iov_iter_count(iter);
__entry->flags = iocb->ki_flags;
),
TP_printk(
"fileid=%02x:%02x:%llu fhandle=0x%08x version=%llu offset=%lld count=%zu ki_flags=%s",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle, __entry->version,
__entry->offset, __entry->count,
__print_flags(__entry->flags, "|", TRACE_IOCB_STRINGS)
)
);
#define DEFINE_NFS_KIOCB_EVENT(name) \
DEFINE_EVENT(nfs_kiocb_event, name, \
TP_PROTO( \
const struct kiocb *iocb, \
const struct iov_iter *iter \
), \
TP_ARGS(iocb, iter))
DEFINE_NFS_KIOCB_EVENT(nfs_file_read);
DEFINE_NFS_KIOCB_EVENT(nfs_file_write);
TRACE_EVENT(nfs_aop_readahead,
TP_PROTO(
const struct inode *inode,