Use O_DIRECT for all IO to devices.

[thirdparty/mdadm.git] / Manage.c

diff --git a/Manage.c b/Manage.c
index efc7c7a8e71d60be942924f61237620601190a3a..90b58897cf4e88f16c13355afa31dc234c011647 100644 (file)
--- a/Manage.c
+++ b/Manage.c
@@ -315,7 +315,7 @@ int Manage_subdevs(char *devname, int fd,
                                return 1;
                        }
                        /* Make sure it isn't in use (in 2.6 or later) */
-                       tfd = open(dv->devname, O_RDONLY|O_EXCL);
+                       tfd = open(dv->devname, O_RDONLY|O_EXCL|O_DIRECT);
                        if (tfd < 0) {
                                fprintf(stderr, Name ": Cannot open %s: %s\n",
                                        dv->devname, strerror(errno));
@@ -458,7 +458,7 @@ int Manage_subdevs(char *devname, int fd,
                                int dfd;
                                if (dv->writemostly)
                                        disc.state |= 1 << MD_DISK_WRITEMOSTLY;
-                               dfd = open(dv->devname, O_RDWR | O_EXCL);
+                               dfd = open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
                                tst->ss->add_to_super(tst, &disc, dfd,
                                                      dv->devname);
                                /* write_init_super will close 'dfd' */