apparmor: rename tctx to ctx

now that cred_ctx has been removed we can rename task_ctxs from tctx
without causing confusion.
Signed-off-by: John Johansen <john.johansen@canonical.com>

security/apparmor/context.c

@@ -156,8 +156,7 @@ int aa_set_current_onexec(struct aa_label *label, bool stack)
  */
 int aa_set_current_hat(struct aa_label *label, u64 token)
 {
-	struct aa_task_ctx *tctx = current_task_ctx();
-	struct aa_cred_ctx *ctx;
+	struct aa_task_ctx *ctx = current_task_ctx();
 	struct cred *new;
 
 	new = prepare_creds();
@@ -165,11 +164,11 @@ int aa_set_current_hat(struct aa_label *label, u64 token)
 		return -ENOMEM;
 	AA_BUG(!label);
 
-	if (!tctx->previous) {
+	if (!ctx->previous) {
 		/* transfer refcount */
-		tctx->previous = cred_label(new);
-		tctx->token = token;
-	} else if (tctx->token == token) {
+		ctx->previous = cred_label(new);
+		ctx->token = token;
+	} else if (ctx->token == token) {
 		aa_put_label(cred_label(new));
 	} else {
 		/* previous_profile && ctx->token != token */
@@ -179,8 +178,8 @@ int aa_set_current_hat(struct aa_label *label, u64 token)
 
 	cred_label(new) = aa_get_newest_label(label);
 	/* clear exec on switching context */
-	aa_put_label(tctx->onexec);
-	tctx->onexec = NULL;
+	aa_put_label(ctx->onexec);
+	ctx->onexec = NULL;
 
 	commit_creds(new);
 	return 0;
@@ -197,13 +196,13 @@ int aa_set_current_hat(struct aa_label *label, u64 token)
  */
 int aa_restore_previous_label(u64 token)
 {
-	struct aa_task_ctx *tctx = current_task_ctx();
+	struct aa_task_ctx *ctx = current_task_ctx();
 	struct cred *new;
 
-	if (tctx->token != token)
+	if (ctx->token != token)
 		return -EACCES;
 	/* ignore restores when there is no saved label */
-	if (!tctx->previous)
+	if (!ctx->previous)
 		return 0;
 
 	new = prepare_creds();
@@ -211,10 +210,10 @@ int aa_restore_previous_label(u64 token)
 		return -ENOMEM;
 
 	aa_put_label(cred_label(new));
-	cred_label(new) = aa_get_newest_label(tctx->previous);
+	cred_label(new) = aa_get_newest_label(ctx->previous);
 	AA_BUG(!cred_label(new));
 	/* clear exec && prev information when restoring to previous context */
-	aa_clear_task_ctx_trans(tctx);
+	aa_clear_task_ctx_trans(ctx);
 
 	commit_creds(new);
 

security/apparmor/domain.c

@@ -779,7 +779,7 @@ static struct aa_label *handle_onexec(struct aa_label *label,
  */
 int apparmor_bprm_set_creds(struct linux_binprm *bprm)
 {
-	struct aa_task_ctx *tctx;
+	struct aa_task_ctx *ctx;
 	struct aa_label *label, *new = NULL;
 	struct aa_profile *profile;
 	char *buffer = NULL;
@@ -794,17 +794,17 @@ int apparmor_bprm_set_creds(struct linux_binprm *bprm)
 	if (bprm->called_set_creds)
 		return 0;
 
-	tctx = current_task_ctx();
+	ctx = current_task_ctx();
 	AA_BUG(!cred_label(bprm->cred));
-	AA_BUG(!tctx);
+	AA_BUG(!ctx);
 
 	label = aa_get_newest_label(cred_label(bprm->cred));
 
 	/* buffer freed below, name is pointer into buffer */
 	get_buffers(buffer);
 	/* Test for onexec first as onexec override other x transitions. */
-	if (tctx->onexec)
-		new = handle_onexec(label, tctx->onexec, tctx->token,
+	if (ctx->onexec)
+		new = handle_onexec(label, ctx->onexec, ctx->token,
 				    bprm, buffer, &cond, &unsafe);
 	else
 		new = fn_label_build(label, profile, GFP_ATOMIC,
@@ -1047,7 +1047,7 @@ static struct aa_label *change_hat(struct aa_label *label, const char *hats[],
 int aa_change_hat(const char *hats[], int count, u64 token, int flags)
 {
 	const struct cred *cred;
-	struct aa_task_ctx *tctx;
+	struct aa_task_ctx *ctx;
 	struct aa_label *label, *previous, *new = NULL, *target = NULL;
 	struct aa_profile *profile;
 	struct aa_perms perms = {};
@@ -1067,9 +1067,9 @@ int aa_change_hat(const char *hats[], int count, u64 token, int flags)
 
 	/* released below */
 	cred = get_current_cred();
-	tctx = current_task_ctx();
+	ctx = current_task_ctx();
 	label = aa_get_newest_cred_label(cred);
-	previous = aa_get_newest_label(tctx->previous);
+	previous = aa_get_newest_label(ctx->previous);
 
 	if (unconfined(label)) {
 		info = "unconfined can not change_hat";

security/apparmor/lsm.c

@@ -582,15 +582,15 @@ static int apparmor_getprocattr(struct task_struct *task, char *name,
 	int error = -ENOENT;
 	/* released below */
 	const struct cred *cred = get_task_cred(task);
-	struct aa_task_ctx *tctx = current_task_ctx();
+	struct aa_task_ctx *ctx = current_task_ctx();
 	struct aa_label *label = NULL;
 
 	if (strcmp(name, "current") == 0)
 		label = aa_get_newest_label(cred_label(cred));
-	else if (strcmp(name, "prev") == 0  && tctx->previous)
-		label = aa_get_newest_label(tctx->previous);
-	else if (strcmp(name, "exec") == 0 && tctx->onexec)
-		label = aa_get_newest_label(tctx->onexec);
+	else if (strcmp(name, "prev") == 0  && ctx->previous)
+		label = aa_get_newest_label(ctx->previous);
+	else if (strcmp(name, "exec") == 0 && ctx->onexec)
+		label = aa_get_newest_label(ctx->onexec);
 	else
 		error = -EINVAL;
 
@@ -1033,14 +1033,14 @@ static int param_set_mode(const char *val, const struct kernel_param *kp)
 static int __init set_init_ctx(void)
 {
 	struct cred *cred = (struct cred *)current->real_cred;
-	struct aa_task_ctx *tctx;
+	struct aa_task_ctx *ctx;
 
-	tctx = aa_alloc_task_ctx(GFP_KERNEL);
-	if (!tctx)
+	ctx = aa_alloc_task_ctx(GFP_KERNEL);
+	if (!ctx)
 		return -ENOMEM;
 
 	cred_label(cred) = aa_get_label(ns_unconfined(root_ns));
-	task_ctx(current) = tctx;
+	task_ctx(current) = ctx;
 
 	return 0;
 }