[RFC PATCH 2/2] NFSD: Move the fh_getattr() helper

[Chuck Lever <cel@kernel.org>]

From: Chuck Lever <chuck.lever@oracle.com>

Clean up: The fh_getattr() function is part of NFSD's file handle
API, so relocate it.

I've made it an un-inlined function so that trace points and new
functionality can easily be introduced. That increases the size of
nfsd.ko by about a page on my x86_64 system (out of 26MB; compiled
with -O2).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfsfh.c | 23 +++++++++++++++++++++++
 fs/nfsd/nfsfh.h |  1 +
 fs/nfsd/vfs.h   | 13 -------------
 3 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 4565112d0324..6f59f957407f 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -662,6 +662,29 @@ fh_update(struct svc_fh *fhp)
 	return nfserr_serverfault;
 }
 
+/**
+ * fh_getattr - Retrieve attributes on a local file
+ * @fhp: File handle of target file
+ * @stat: Caller-supplied kstat buffer to be filled in
+ *
+ * Returns nfs_ok on success, otherwise an NFS status code is
+ * returned.
+ */
+__be32 fh_getattr(const struct svc_fh *fhp, struct kstat *stat)
+{
+	struct path p = {
+		.mnt		= fhp->fh_export->ex_path.mnt,
+		.dentry		= fhp->fh_dentry,
+	};
+	u32 request_mask = STATX_BASIC_STATS;
+
+	if (fhp->fh_maxsize == NFS4_FHSIZE)
+		request_mask |= (STATX_BTIME | STATX_CHANGE_COOKIE);
+
+	return nfserrno(vfs_getattr(&p, stat, request_mask,
+				    AT_STATX_SYNC_AS_STAT));
+}
+
 /**
  * fh_fill_pre_attrs - Fill in pre-op attributes
  * @fhp: file handle to be updated
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h
index 6f5255d1c190..5ef7191f8ad8 100644
--- a/fs/nfsd/nfsfh.h
+++ b/fs/nfsd/nfsfh.h
@@ -222,6 +222,7 @@ extern char * SVCFH_fmt(struct svc_fh *fhp);
 __be32	fh_verify(struct svc_rqst *, struct svc_fh *, umode_t, int);
 __be32	fh_verify_local(struct net *, struct svc_cred *, struct auth_domain *,
 			struct svc_fh *, umode_t, int);
+__be32	fh_getattr(const struct svc_fh *fhp, struct kstat *stat);
 __be32	fh_compose(struct svc_fh *, struct svc_export *, struct dentry *, struct svc_fh *);
 __be32	fh_update(struct svc_fh *);
 void	fh_put(struct svc_fh *);
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index 4007dcbbbfef..0c0292611c6d 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -160,17 +160,4 @@ __be32		nfsd_permission(struct svc_cred *cred, struct svc_export *exp,
 
 void		nfsd_filp_close(struct file *fp);
 
-static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat)
-{
-	u32 request_mask = STATX_BASIC_STATS;
-	struct path p = {.mnt = fh->fh_export->ex_path.mnt,
-			 .dentry = fh->fh_dentry};
-
-	if (fh->fh_maxsize == NFS4_FHSIZE)
-		request_mask |= (STATX_BTIME | STATX_CHANGE_COOKIE);
-
-	return nfserrno(vfs_getattr(&p, stat, request_mask,
-				    AT_STATX_SYNC_AS_STAT));
-}
-
 #endif /* LINUX_NFSD_VFS_H */
-- 
2.50.0