5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jeff Layton jlayton@kernel.org
[ Upstream commit 6106d9119b6599fa23dc556b429d887b4c2d9f62 ]
We only need the inode number for this, not a full rack of attributes. Rename this function make it take a pointer to a u64 instead of struct kstat, and change it to just request STATX_INO.
Signed-off-by: Jeff Layton jlayton@kernel.org [ cel: renamed get_mounted_on_ino() ] Signed-off-by: Chuck Lever chuck.lever@oracle.com --- fs/nfsd/nfs4xdr.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 0f30d93577e7b..3ad9b41c51730 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2772,9 +2772,10 @@ static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 }
-static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) +static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino) { struct path path = exp->ex_path; + struct kstat stat; int err;
path_get(&path); @@ -2782,8 +2783,10 @@ static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) if (path.dentry != path.mnt->mnt_root) break; } - err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); + err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT); path_put(&path); + if (!err) + *pino = stat.ino; return err; }
@@ -3280,22 +3283,21 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, *p++ = cpu_to_be32(stat.btime.tv_nsec); } if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { - struct kstat parent_stat; u64 ino = stat.ino;
p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; /* - * Get parent's attributes if not ignoring crossmount - * and this is the root of a cross-mounted filesystem. + * Get ino of mountpoint in parent filesystem, if not ignoring + * crossmount and this is the root of a cross-mounted + * filesystem. */ if (ignore_crossmnt == 0 && dentry == exp->ex_path.mnt->mnt_root) { - err = get_parent_attributes(exp, &parent_stat); + err = nfsd4_get_mounted_on_ino(exp, &ino); if (err) goto out_nfserr; - ino = parent_stat.ino; } p = xdr_encode_hyper(p, ino); }