inode->i_op is never NULL

[firefly-linux-kernel-4.4.55.git] / fs / nfsd / vfs.c

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 4433c8f001635862419edb603ecf5725462f3222..5245a3965004259f2d156d495875260b7d254a6b 100644 (file)
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -671,6 +671,7 @@ __be32
 nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
                        int access, struct file **filp)
 {
+       const struct cred *cred = current_cred();
        struct dentry   *dentry;
        struct inode    *inode;
        int             flags = O_RDONLY|O_LARGEFILE;
@@ -725,7 +726,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
                DQUOT_INIT(inode);
        }
        *filp = dentry_open(dget(dentry), mntget(fhp->fh_export->ex_path.mnt),
-                               flags);
+                           flags, cred);
        if (IS_ERR(*filp))
                host_err = PTR_ERR(*filp);
 out_nfserr:
@@ -1169,7 +1170,7 @@ nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *resfhp,
         * send along the gid on create when it tries to implement
         * setgid directories via NFS:
         */
-       if (current->fsuid != 0)
+       if (current_fsuid() != 0)
                iap->ia_valid &= ~(ATTR_UID|ATTR_GID);
        if (iap->ia_valid)
                return nfsd_setattr(rqstp, resfhp, iap, 0, (time_t)0);
@@ -1210,7 +1211,7 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
        dirp = dentry->d_inode;
 
        err = nfserr_notdir;
-       if(!dirp->i_op || !dirp->i_op->lookup)
+       if (!dirp->i_op->lookup)
                goto out;
        /*
         * Check whether the response file handle has been verified yet.
@@ -1346,7 +1347,7 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
        /* Get all the sanity checks out of the way before
         * we lock the parent. */
        err = nfserr_notdir;
-       if(!dirp->i_op || !dirp->i_op->lookup)
+       if (!dirp->i_op->lookup)
                goto out;
        fh_lock_nested(fhp, I_MUTEX_PARENT);
 
@@ -1481,7 +1482,7 @@ nfsd_readlink(struct svc_rqst *rqstp, struct svc_fh *fhp, char *buf, int *lenp)
        inode = dentry->d_inode;
 
        err = nfserr_inval;
-       if (!inode->i_op || !inode->i_op->readlink)
+       if (!inode->i_op->readlink)
                goto out;
 
        touch_atime(fhp->fh_export->ex_path.mnt, dentry);
@@ -2001,7 +2002,7 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
                IS_APPEND(inode)?       " append" : "",
                __mnt_is_readonly(exp->ex_path.mnt)?    " ro" : "");
        dprintk("      owner %d/%d user %d/%d\n",
-               inode->i_uid, inode->i_gid, current->fsuid, current->fsgid);
+               inode->i_uid, inode->i_gid, current_fsuid(), current_fsgid());
 #endif
 
        /* Normally we reject any write/sattr etc access on a read-only file
@@ -2044,7 +2045,7 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
         * with NFSv3.
         */
        if ((acc & NFSD_MAY_OWNER_OVERRIDE) &&
-           inode->i_uid == current->fsuid)
+           inode->i_uid == current_fsuid())
                return 0;
 
        /* This assumes  NFSD_MAY_{READ,WRITE,EXEC} == MAY_{READ,WRITE,EXEC} */
@@ -2161,7 +2162,7 @@ nfsd_set_posix_acl(struct svc_fh *fhp, int type, struct posix_acl *acl)
        size_t size;
        int error;
 
-       if (!IS_POSIXACL(inode) || !inode->i_op ||
+       if (!IS_POSIXACL(inode) ||
            !inode->i_op->setxattr || !inode->i_op->removexattr)
                return -EOPNOTSUPP;
        switch(type) {