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'zfs share -a' should handle 'canmount=noauto'

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The 'zfs share -a' currently skips any filesystems which
have 'canmount=noauto' set. This behavior is unexpected since the
one would expect 'zfs share -a' to share any mounted filesystem
that has the 'sharenfs' property already set.

This changes the behavior of 'zfs share -a' to allow the sharing
of 'canmount=noauto' datasets if they are mounted.

Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Don Brady <don.brady@delphix.com>
Reviewed-by: Prakash Surya <prakash.surya@delphix.com>
Signed-off-by: George Wilson <gwilson@delphix.com>
External-issue: DLPX-71313
Closes #10688
This commit is contained in:
George Wilson 2020-08-11 14:55:04 -06:00 committed by GitHub
parent 6f763d4085
commit 53c9d1d9b5
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 21 additions and 2 deletions
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10
cmd/zfs/zfs_main.c
View File

@ -6627,7 +6627,15 @@ share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
zfs_get_name(zhp));
return (1);
} else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
return (0);
/*
* When performing a 'zfs mount -a', we skip any mounts for
* datasets that have 'noauto' set. Sharing a dataset with
* 'noauto' set is only allowed if it's mounted.
*/
if (op == OP_MOUNT)
return (0);
if (op == OP_SHARE && !zfs_is_mounted(zhp, NULL))
return (0);
}
/*

13
tests/zfs-tests/tests/functional/cli_root/zfs_set/canmount_002_pos.ksh
View File

@ -41,8 +41,10 @@
# STRATEGY:
# 1. Setup a pool and create fs, volume, snapshot clone within it.
# 2. Set canmount=noauto for each dataset and check the return value
# and check if it still can be mounted by mount -a.
# and check if it still can be mounted by mount -a or shared by
# share -a
# 3. mount each dataset(except volume) to see if it can be mounted.
# 4. verify that a mounted dataset can be shared by share -a.
#
verify_runnable "both"
@ -100,6 +102,7 @@ log_onexit cleanup
set -A old_mnt
set -A old_canmount
set -A old_sharenfs
typeset tmpmnt=/tmpmount$$
typeset ds
@ -113,6 +116,7 @@ while (( i < ${#dataset_pos[*]} )); do
ds=${dataset_pos[i]}
old_mnt[i]=$(get_prop mountpoint $ds)
old_canmount[i]=$(get_prop canmount $ds)
old_sharenfs[i]=$(get_prop sharenfs $ds)
(( i = i + 1 ))
done
@ -121,6 +125,7 @@ while (( i < ${#dataset_pos[*]} )) ; do
dataset=${dataset_pos[i]}
set_n_check_prop "noauto" "canmount" "$dataset"
log_must zfs set mountpoint=$tmpmnt $dataset
log_must zfs set sharenfs=on $dataset
if ismounted $dataset; then
zfs unmount -a > /dev/null 2>&1
log_must mounted $dataset
@ -128,6 +133,8 @@ while (( i < ${#dataset_pos[*]} )) ; do
log_must unmounted $dataset
log_must zfs mount -a
log_must unmounted $dataset
log_must zfs share -a
log_mustnot is_exported $tmpmnt
else
log_must zfs mount -a
log_must unmounted $dataset
@ -137,6 +144,10 @@ while (( i < ${#dataset_pos[*]} )) ; do
log_must zfs mount $dataset
log_must mounted $dataset
log_must zfs share -a
log_must is_exported $tmpmnt
log_must zfs set sharenfs="${old_sharenfs[i]}" $dataset
log_must zfs set canmount="${old_canmount[i]}" $dataset
log_must zfs set mountpoint="${old_mnt[i]}" $dataset
(( i = i + 1 ))