X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/39236c6e673c41db228275375ab7fdb0f837b292..143464d58d2bd6378e74eec636961ceb0d32fb91:/bsd/kern/ubc_subr.c

diff --git a/bsd/kern/ubc_subr.c b/bsd/kern/ubc_subr.c
index 9d3276570..2916f3e08 100644
--- a/bsd/kern/ubc_subr.c
+++ b/bsd/kern/ubc_subr.c
@@ -1744,6 +1744,9 @@ ubc_map(vnode_t vp, int flags)
 			if ( !ISSET(uip->ui_flags, UI_ISMAPPED))
 			        need_ref = 1;
 			SET(uip->ui_flags, (UI_WASMAPPED | UI_ISMAPPED));
+			if (flags & PROT_WRITE) {
+				SET(uip->ui_flags, UI_MAPPEDWRITE);
+			}
 		}
 		CLR(uip->ui_flags, UI_MAPBUSY);
 
@@ -2778,6 +2781,9 @@ ubc_cs_blob_add(
 	const CS_CodeDirectory *cd;
 	off_t			blob_start_offset, blob_end_offset;
 	SHA1_CTX		sha1ctxt;
+	boolean_t		record_mtime;
+
+	record_mtime = FALSE;
 
 	blob_handle = IPC_PORT_NULL;
 
@@ -2981,6 +2987,11 @@ ubc_cs_blob_add(
 		goto out;
 	}
 
+	if (uip->cs_blobs == NULL) {
+		/* loading 1st blob: record the file's current "modify time" */
+		record_mtime = TRUE;
+	}
+
 	/*
 	 * Add this blob to the list of blobs for this vnode.
 	 * We always add at the front of the list and we never remove a
@@ -3021,6 +3032,10 @@ ubc_cs_blob_add(
 
 	vnode_unlock(vp);
 
+	if (record_mtime) {
+		vnode_mtime(vp, &uip->cs_mtime, vfs_context_current());
+	}
+
 	error = 0;	/* success ! */
 
 out:
@@ -3158,6 +3173,24 @@ out:
 	return blobs;
 }
 
+void
+ubc_get_cs_mtime(
+	struct vnode	*vp,
+	struct timespec	*cs_mtime)
+{
+	struct ubc_info	*uip;
+
+	if (! UBCINFOEXISTS(vp)) {
+		cs_mtime->tv_sec = 0;
+		cs_mtime->tv_nsec = 0;
+		return;
+	}
+
+	uip = vp->v_ubcinfo;
+	cs_mtime->tv_sec = uip->cs_mtime.tv_sec;
+	cs_mtime->tv_nsec = uip->cs_mtime.tv_nsec;
+}
+
 unsigned long cs_validate_page_no_hash = 0;
 unsigned long cs_validate_page_bad_hash = 0;
 boolean_t