xnu-2422.115.4.tar.gz

[apple/xnu.git] / bsd / kern / ubc_subr.c

diff --git a/bsd/kern/ubc_subr.c b/bsd/kern/ubc_subr.c
index 9d32765704f7de24d5d75067c860d17f0d749da9..2916f3e08b3546f6fc770034999b9d780cbea371 100644 (file)
--- 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