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NFSD: Add nfsd4_encode_fattr4_mounted_on_fileid()

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Refactor the encoder for FATTR4_MOUNTED_ON_FILEID into a helper. In
a subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2023-09-18 10:01:21 -04:00
parent d18286112d
commit 1b9097e366
1 changed files with 22 additions and 17 deletions
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39
fs/nfsd/nfs4xdr.c
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@ -2915,6 +2915,7 @@ struct nfsd4_fattr_args {
u64 size;
u32 rdattr_err;
bool contextsupport;
bool ignore_crossmnt;
};
static __be32 nfsd4_encode_fattr4__true(struct xdr_stream *xdr,
@ -3275,6 +3276,23 @@ static __be32 nfsd4_encode_fattr4_time_modify(struct xdr_stream *xdr,
return nfsd4_encode_nfstime4(xdr, &args->stat.mtime);
}
static __be32 nfsd4_encode_fattr4_mounted_on_fileid(struct xdr_stream *xdr,
const struct nfsd4_fattr_args *args)
{
u64 ino;
int err;
if (!args->ignore_crossmnt &&
args->dentry == args->exp->ex_path.mnt->mnt_root) {
err = nfsd4_get_mounted_on_ino(args->exp, &ino);
if (err)
return nfserrno(err);
} else
ino = args->stat.ino;
return nfsd4_encode_uint64_t(xdr, ino);
}
/*
* Note: @fhp can be NULL; in this case, we might have to compose the filehandle
* ourselves.
@ -3314,6 +3332,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
args.rqstp = rqstp;
args.exp = exp;
args.dentry = dentry;
args.ignore_crossmnt = (ignore_crossmnt != 0);
args.rdattr_err = 0;
if (exp->ex_fslocs.migrated) {
@ -3628,23 +3647,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
goto out;
}
if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
u64 ino = args.stat.ino;
p = xdr_reserve_space(xdr, 8);
if (!p)
goto out_resource;
/*
* 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 = nfsd4_get_mounted_on_ino(exp, &ino);
if (err)
goto out_nfserr;
}
p = xdr_encode_hyper(p, ino);
status = nfsd4_encode_fattr4_mounted_on_fileid(xdr, &args);
if (status != nfs_ok)
goto out;
}
#ifdef CONFIG_NFSD_PNFS
if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {