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Add receive:append permission for limited receive

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Force receive (zfs receive -F) can rollback or destroy snapshots and
file systems that do not exist on the sending side (see zfs-receive man
page). This means an user having the receive permission can effectively
delete data on receiving side, even if such user does not have explicit
rollback or destroy permissions.

This patch adds the receive:append permission, which only permits
limited, non-forced receive. Behavior for users with full receive
permission is not changed in any way.

Fixes #16943
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Gionatan Danti <g.danti@assyoma.it>
Closes #17015
This commit is contained in:
shodanshok
2025-03-13 18:54:14 +01:00
committed by GitHub
parent 1b495eeab3
commit 201d262949
7 changed files with 62 additions and 4 deletions
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man/man8/zfs-allow.8
+2 -1
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@@ -207,7 +207,7 @@ load-key subcommand Allows loading and unloading of encryption key (see \fBzfs l
change-key subcommand Allows changing an encryption key via \fBzfs change-key\fR.
mount subcommand Allows mounting/umounting ZFS datasets
promote subcommand Must also have the \fBmount\fR and \fBpromote\fR ability in the origin file system
receive subcommand Must also have the \fBmount\fR and \fBcreate\fR ability
receive subcommand Must also have the \fBmount\fR and \fBcreate\fR ability, required for \fBzfs receive -F\fR (see also \fBreceive:append\fR for limited, non forced receive)
release subcommand Allows releasing a user hold which might destroy the snapshot
rename subcommand Must also have the \fBmount\fR and \fBcreate\fR ability in the new parent
rollback subcommand Must also have the \fBmount\fR ability
@@ -215,6 +215,7 @@ send subcommand
share subcommand Allows sharing file systems over NFS or SMB protocols
snapshot subcommand Must also have the \fBmount\fR ability
receive:append other Must also have the \fBmount\fR and \fBcreate\fR ability, limited receive ability (can not do receive -F)
groupquota other Allows accessing any \fBgroupquota@\fI…\fR property
groupobjquota other Allows accessing any \fBgroupobjquota@\fI…\fR property
groupused other Allows reading any \fBgroupused@\fI…\fR property