From 62796bf26e196da724f86bcbc327f5f9f999d305 Mon Sep 17 00:00:00 2001 From: huyan Date: Sat, 16 Mar 2019 14:53:30 +0800 Subject: [PATCH] backport ignore EBUSY when a filesystem is already mount --- utils/mount/Makefile.am | 1 + utils/mount/stropts.c | 17 +++++++++++------ 2 files changed, 12 insertions(+), 6 deletions(-) diff --git a/utils/mount/Makefile.am b/utils/mount/Makefile.am index 7b97c31..ad0be93 100644 --- a/utils/mount/Makefile.am +++ b/utils/mount/Makefile.am @@ -27,6 +27,7 @@ endif mount_nfs_LDADD = ../../support/nfs/libnfs.la \ ../../support/export/libexport.a \ + ../../support/misc/libmisc.a \ $(LIBTIRPC) mount_nfs_SOURCES = $(mount_common) diff --git a/utils/mount/stropts.c b/utils/mount/stropts.c index 4d2e37e..5333498 100644 --- a/utils/mount/stropts.c +++ b/utils/mount/stropts.c @@ -48,6 +48,7 @@ #include "version.h" #include "parse_dev.h" #include "conffile.h" +#include "misc.h" #ifndef NFS_PROGRAM #define NFS_PROGRAM (100003) @@ -1078,14 +1079,18 @@ static int nfsmount_fg(struct nfsmount_info *mi) if (nfs_try_mount(mi)) return EX_SUCCESS; - if (errno == EBUSY) - /* The only cause of EBUSY is if exactly the desired - * filesystem is already mounted. That can arguably - * be seen as success. "mount -a" tries to optimise - * out this case but sometimes fails. Help it out - * by pretending everything is rosy +#pragma GCC diagnostic ignored "-Wdiscarded-qualifiers" + if (errno == EBUSY && is_mountpoint(mi->node)) { +#pragma GCC diagnostic warning "-Wdiscarded-qualifiers" + /* + * EBUSY can happen when mounting a filesystem that + * is already mounted or when the context= are + * different when using the -o sharecache + * + * Only error out in the latter case. */ return EX_SUCCESS; + } if (nfs_is_permanent_error(errno)) break; -- 1.8.3.1