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volume: add new option -o o=noquota

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add a new option to completely disable xfs quota usage for a volume.

xfs quota set on a volume, even just for tracking disk usage, can
cause weird errors if the volume is later re-used by a container with
a different quota projid.  More specifically, link(2) and rename(2)
might fail with EXDEV if the source file has a projid that is
different from the parent directory.

To prevent such kind of issues, the volume should be created
beforehand with `podman volume create -o o=noquota $ID`

Closes: https://github.com/containers/podman/issues/14049

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano
2022-04-28 11:39:12 +02:00
parent 9133a6d044
commit 91ead15283
7 changed files with 70 additions and 18 deletions
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docs/source/markdown/podman-volume-create.1.md
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@ -38,7 +38,8 @@ The `device` option sets the device to be mounted, and is equivalent to the `dev
The `o` option sets options for the mount, and is equivalent to the `-o` flag to **mount(8)** with these exceptions:
- The `o` option supports `uid` and `gid` options to set the UID and GID of the created volume that are not normally supported by **mount(8)**.
- The `o` option supports the `size` option to set the maximum size of the created volume and the `inodes` option to set the maximum number of inodes for the volume. Currently these flags are only supported on "xfs" file system mounted with the `prjquota` flag described in the **xfs_quota(8)** man page.
- The `o` option supports the `size` option to set the maximum size of the created volume, the `inodes` option to set the maximum number of inodes for the volume and `noquota` to completely disable quota support even for tracking of disk usage. Currently these flags are only supported on "xfs" file system mounted with the `prjquota` flag described in the **xfs_quota(8)** man page.
- The `o` option supports .
- Using volume options other then the UID/GID options with the **local** driver requires root privileges.
When not using the **local** driver, the given options are passed directly to the volume plugin. In this case, supported options are dictated by the plugin in question, not Podman.