From 20c88dc3efd7e83aa872fad786f9e74ab5e350b9 Mon Sep 17 00:00:00 2001 From: LOLi Date: Mon, 31 Jul 2017 20:07:05 +0200 Subject: [PATCH] Fix volmode=none property behavior at import time At import time spa_import() calls zvol_create_minors() directly: with the current implementation we have no way to avoid device node creation when volmode=none. Fix this by enforcing volmode=none directly in zvol_alloc(). Reviewed-by: Brian Behlendorf Signed-off-by: loli10K Closes #6426 --- module/zfs/zvol.c | 3 +++ tests/zfs-tests/include/libtest.shlib | 2 +- .../zvol/zvol_misc/zvol_misc_volmode.ksh | 14 ++++++++++++-- 3 files changed, 16 insertions(+), 3 deletions(-) diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c index 623fb9b22..254760220 100644 --- a/module/zfs/zvol.c +++ b/module/zfs/zvol.c @@ -1603,6 +1603,9 @@ zvol_alloc(dev_t dev, const char *name) if (volmode == ZFS_VOLMODE_DEFAULT) volmode = zvol_volmode; + if (volmode == ZFS_VOLMODE_NONE) + return (NULL); + zv = kmem_zalloc(sizeof (zvol_state_t), KM_SLEEP); list_link_init(&zv->zv_next); diff --git a/tests/zfs-tests/include/libtest.shlib b/tests/zfs-tests/include/libtest.shlib index 88594c201..be71c0d75 100644 --- a/tests/zfs-tests/include/libtest.shlib +++ b/tests/zfs-tests/include/libtest.shlib @@ -3425,7 +3425,7 @@ function swap_setup typeset swapdev=$1 if is_linux; then - log_must mkswap $swapdev > /dev/null 2>&1 + log_must eval "mkswap $swapdev > /dev/null 2>&1" log_must swapon $swapdev else log_must swap -a $swapdev diff --git a/tests/zfs-tests/tests/functional/zvol/zvol_misc/zvol_misc_volmode.ksh b/tests/zfs-tests/tests/functional/zvol/zvol_misc/zvol_misc_volmode.ksh index 5cf6a60b3..934d8942f 100755 --- a/tests/zfs-tests/tests/functional/zvol/zvol_misc/zvol_misc_volmode.ksh +++ b/tests/zfs-tests/tests/functional/zvol/zvol_misc/zvol_misc_volmode.ksh @@ -40,7 +40,8 @@ # 4. Verify "volmode=dev" hides partition info on the device # 5. Verify "volmode=default" behaves accordingly to "volmode" module parameter # 6. Verify "volmode" property is inherited correctly -# 7. Verify "volmode" behaves accordingly to zvol_inhibit_dev (Linux only) +# 7. Verify "volmode" behaves correctly at import time +# 8. Verify "volmode" behaves accordingly to zvol_inhibit_dev (Linux only) # # NOTE: changing volmode may need to remove minors, which could be open, so call # udev_wait() before we "zfs set volmode=". @@ -54,6 +55,7 @@ function cleanup log_must zfs inherit volmode $TESTPOOL udev_wait sysctl_inhibit_dev 0 + sysctl_volmode 1 udev_cleanup } @@ -194,10 +196,18 @@ log_must zfs set volmode=full $TESTPOOL verify_inherited 'volmode' 'none' $SUBZVOL $VOLFS blockdev_missing $SUBZDEV blockdev_exists $ZDEV + +# 7. Verify "volmode" behaves correctly at import time +log_must zpool export $TESTPOOL +blockdev_missing $ZDEV +blockdev_missing $SUBZDEV +log_must zpool import $TESTPOOL +blockdev_exists $ZDEV +blockdev_missing $SUBZDEV log_must_busy zfs destroy $ZVOL log_must_busy zfs destroy $SUBZVOL -# 7. Verify "volmode" behaves accordingly to zvol_inhibit_dev (Linux only) +# 8. Verify "volmode" behaves accordingly to zvol_inhibit_dev (Linux only) if is_linux; then sysctl_inhibit_dev 1 # 7.1 Verify device nodes not are not created with "volmode=full"