Test case: rollback_003_pos #6143
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behlendorf
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* Add 'zfs bookmark' coverage (zfs_bookmark_cliargs) * Add OpenZFS 8166 coverage (zpool_scrub_offline_device) * Fix "busy" zfs_mount_remount failures * Fix bootfs_003_pos, bootfs_004_neg, zdb_005_pos local cleanup * Update usage of $KEEP variable, add get_all_pools() function * Enable history_008_pos and rsend_019_pos (non-32bit builders) * Enable zfs_copies_005_neg, update local cleanup * Fix zfs_send_007_pos (large_dnode + OpenZFS 8199) * Fix rollback_003_pos (use dataset name, not mountpoint, to unmount) * Update default_raidz_setup() to work properly with more than 3 disks * Use $TEST_BASE_DIR instead of hardcoded (/var)/tmp for file VDEVs * Update usage of /dev/random to /dev/urandom Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: loli10K <ezomori.nozomu@gmail.com> Issue #6086 Closes #5658 Closes #6143 Closes #6421 Closes #6627 Closes #6632
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behlendorf
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Oct 3, 2018
When using "zfs destroy" on a dataset that is using "sharenfs=on" and has been automatically exported (by libzfs), the dataset will not be automatically unexported as it should be. This workflow appears to have been broken by this commit: 3fd3e56 In that change, the "zfs_unmount" function was modified to use the "mnt.mnt_special" field when determining the mount point that is being unmounted, rather than "mnt.mnt_mountp". As a result, when "mntpt" is passed into "zfs_unshare_proto", it's value is now the dataset name rather than the mountpoint. Thus, when this value is used with the "is_shared" function (via "zfs_unshare_proto") it will not find a match (since that function assumes it'll be passed the mountpoint) and incorrectly reports that the dataset is not shared. This can be easily reproduced with the following commands: $ sudo zpool create tank xvdb $ sudo zfs create -o sharenfs=on tank/fish $ sudo zfs destroy tank/fish $ sudo zfs list -r tank NAME USED AVAIL REFER MOUNTPOINT tank 97.5K 7.27G 24K /tank $ sudo exportfs /tank/fish <world> $ sudo cat /etc/dfs/sharetab /tank/fish - nfs rw,crossmnt At this point, the "tank/fish" filesystem doesn't exist, but it's still listed as exported when looking at "exportfs" and "/etc/dfs/sharetab". Also note, this change brings us back in-sync with the illumos code, as it pertains to this one line; on illumos, "mnt.mnt_mountp" is used. Reviewed by: loli10K <ezomori.nozomu@gmail.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Co-authored-by: George Wilson <george.wilson@delphix.com> Signed-off-by: Prakash Surya <prakash.surya@delphix.com> Issue #6143 Closes #7941
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Some additional info on this bug. The problem is actually not the It seems the call to We could definitely solve this problem in userspace with changelists or some other mechanism, but I would rather see if we can fix the kernel module so that this can all happen atomically. Now that we know what's actually wrong, I'm going to reopen this issue so we can get a proper fix together. |
GregorKopka
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Jan 7, 2019
When using "zfs destroy" on a dataset that is using "sharenfs=on" and has been automatically exported (by libzfs), the dataset will not be automatically unexported as it should be. This workflow appears to have been broken by this commit: 3fd3e56 In that change, the "zfs_unmount" function was modified to use the "mnt.mnt_special" field when determining the mount point that is being unmounted, rather than "mnt.mnt_mountp". As a result, when "mntpt" is passed into "zfs_unshare_proto", it's value is now the dataset name rather than the mountpoint. Thus, when this value is used with the "is_shared" function (via "zfs_unshare_proto") it will not find a match (since that function assumes it'll be passed the mountpoint) and incorrectly reports that the dataset is not shared. This can be easily reproduced with the following commands: $ sudo zpool create tank xvdb $ sudo zfs create -o sharenfs=on tank/fish $ sudo zfs destroy tank/fish $ sudo zfs list -r tank NAME USED AVAIL REFER MOUNTPOINT tank 97.5K 7.27G 24K /tank $ sudo exportfs /tank/fish <world> $ sudo cat /etc/dfs/sharetab /tank/fish - nfs rw,crossmnt At this point, the "tank/fish" filesystem doesn't exist, but it's still listed as exported when looking at "exportfs" and "/etc/dfs/sharetab". Also note, this change brings us back in-sync with the illumos code, as it pertains to this one line; on illumos, "mnt.mnt_mountp" is used. Reviewed by: loli10K <ezomori.nozomu@gmail.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Co-authored-by: George Wilson <george.wilson@delphix.com> Signed-off-by: Prakash Surya <prakash.surya@delphix.com> Issue openzfs#6143 Closes openzfs#7941
FransUrbo
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Apr 28, 2019
* Add 'zfs bookmark' coverage (zfs_bookmark_cliargs) * Add OpenZFS 8166 coverage (zpool_scrub_offline_device) * Fix "busy" zfs_mount_remount failures * Fix bootfs_003_pos, bootfs_004_neg, zdb_005_pos local cleanup * Update usage of $KEEP variable, add get_all_pools() function * Enable history_008_pos and rsend_019_pos (non-32bit builders) * Enable zfs_copies_005_neg, update local cleanup * Fix zfs_send_007_pos (large_dnode + OpenZFS 8199) * Fix rollback_003_pos (use dataset name, not mountpoint, to unmount) * Update default_raidz_setup() to work properly with more than 3 disks * Use $TEST_BASE_DIR instead of hardcoded (/var)/tmp for file VDEVs * Update usage of /dev/random to /dev/urandom Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: loli10K <ezomori.nozomu@gmail.com> Issue openzfs#6086 Closes openzfs#5658 Closes openzfs#6143 Closes openzfs#6421 Closes openzfs#6627 Closes openzfs#6632
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This issue has been automatically marked as "stale" because it has not had any activity for a while. It will be closed in 90 days if no further activity occurs. Thank you for your contributions. |
behlendorf
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Dec 22, 2021
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue openzfs#6143. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue openzfs#6143
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This remains an issue, see #12898 Reopening. |
behlendorf
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Dec 22, 2021
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue openzfs#6143. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue openzfs#6143
behlendorf
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Dec 22, 2021
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue #6143. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #12898 Issue #6143
tonyhutter
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Feb 10, 2022
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue openzfs#6143. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes openzfs#12898 Issue openzfs#6143
tonyhutter
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Feb 14, 2022
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue openzfs#6143. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes openzfs#12898 Issue openzfs#6143
tonyhutter
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Feb 16, 2022
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue openzfs#6143. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes openzfs#12898 Issue openzfs#6143
tonyhutter
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Feb 17, 2022
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue openzfs#6143. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes openzfs#12898 Issue openzfs#6143
nicman23
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Aug 22, 2022
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue openzfs#6143. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes openzfs#12898 Issue openzfs#6143
nicman23
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Aug 22, 2022
Under Linux when rolling back a mounted filesystem negative dentries may not be dropped from the cache. This can result in an ENOENT being incorrectly returned on first access. Issuing a `df` before the unmount results in the negative dentries being invalidated and side steps the issue. This is solely a workaround for the test case on Linux and not correct behavior. The core issue of invalidating negative dentries needs to be handled with a kernel side change. This is being tracked as issue openzfs#6143. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes openzfs#12898 Issue openzfs#6143
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System information
Describe the problem you're observing
Occasional failure of test case
rollback_003_pos.Describe how to reproduce the problem
Reproducible occasionally by the automated testing and locally.
Include any warning/errors/backtraces from the system logs
http://build.zfsonlinux.org/builders/CentOS%207%20x86_64%20Mainline%20%28TEST%29/builds/2466/steps/shell_9/logs/log
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