git: 4078a7051ab1 - stable/13 - Open-code proc_set_cred_init()

The branch stable/13 has been updated by olce:

URL: https://cgit.FreeBSD.org/src/commit/?id=4078a7051ab146d146e88720fac85ca164af2d4a

commit 4078a7051ab146d146e88720fac85ca164af2d4a
Author:     Olivier Certner <olce@FreeBSD.org>
AuthorDate: 2023-09-25 08:48:49 +0000
Commit:     Olivier Certner <olce@FreeBSD.org>
CommitDate: 2025-01-17 12:24:43 +0000

    Open-code proc_set_cred_init()
    
    This function is to be called only when initializing a new process (so,
    'proc0' and at fork), and not in any other circumstances.  Setting the
    process' 'p_ucred' field to the result of crcowget() on the original
    credentials is the only thing it does, hiding the fact that the process'
    'p_ucred' field is crushed by the call.  Moreover, most of the code it
    executes is already encapsulated in crcowget().
    
    To prevent misuse and improve code readability, just remove this
    function and replace it with a direct assignment to 'p_ucred'.
    
    Reviewed by:            markj (earlier version), kib
    MFC after:              1 week
    Sponsored by:           The FreeBSD Foundation
    Differential Revision:  https://reviews.freebsd.org/D42255
    
    (cherry picked from commit 92541c12bc25c59333d7f3b0721b6b16aaff3644)
---
 sys/kern/init_main.c |  2 +-
 sys/kern/kern_fork.c |  2 +-
 sys/kern/kern_prot.c | 11 -----------
 sys/sys/ucred.h      |  1 -
 4 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index 66db882ba4f3..f827000d9200 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -558,7 +558,7 @@ proc0_init(void *dummy __unused)
 	curthread->td_ucred = NULL;
 	newcred->cr_prison = &prison0;
 	newcred->cr_users++; /* avoid assertion failure */
-	proc_set_cred_init(p, newcred);
+	p->p_ucred = crcowget(newcred);
 	newcred->cr_users--;
 	crfree(newcred);
 #ifdef AUDIT
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c
index 114eeeb2a943..413453f9bf8f 100644
--- a/sys/kern/kern_fork.c
+++ b/sys/kern/kern_fork.c
@@ -1049,7 +1049,7 @@ fork1(struct thread *td, struct fork_req *fr)
 	 * XXX: This is ugly; when we copy resource usage, we need to bump
 	 *      per-cred resource counters.
 	 */
-	proc_set_cred_init(newproc, td->td_ucred);
+	newproc->p_ucred = crcowget(td->td_ucred);
 
 	/*
 	 * Initialize resource accounting for the child process.
diff --git a/sys/kern/kern_prot.c b/sys/kern/kern_prot.c
index 482472025fdd..2dc5ecd00175 100644
--- a/sys/kern/kern_prot.c
+++ b/sys/kern/kern_prot.c
@@ -2275,17 +2275,6 @@ cru2xt(struct thread *td, struct xucred *xcr)
 	xcr->cr_pid = td->td_proc->p_pid;
 }
 
-/*
- * Set initial process credentials.
- * Callers are responsible for providing the reference for provided credentials.
- */
-void
-proc_set_cred_init(struct proc *p, struct ucred *newcred)
-{
-
-	p->p_ucred = crcowget(newcred);
-}
-
 /*
  * Change process credentials.
  * Callers are responsible for providing the reference for passed credentials
diff --git a/sys/sys/ucred.h b/sys/sys/ucred.h
index 876919f56fb1..f5e2757f7417 100644
--- a/sys/sys/ucred.h
+++ b/sys/sys/ucred.h
@@ -158,7 +158,6 @@ void	crcopy(struct ucred *dest, struct ucred *src);
 struct ucred	*crcopysafe(struct proc *p, struct ucred *cr);
 struct ucred	*crdup(struct ucred *cr);
 void	crextend(struct ucred *cr, int n);
-void	proc_set_cred_init(struct proc *p, struct ucred *cr);
 void	proc_set_cred(struct proc *p, struct ucred *cr);
 void	proc_unset_cred(struct proc *p);
 void	crfree(struct ucred *cr);