mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2026-05-25 19:57:43 +03:00
Lint most manpages
Reviewed-by: Richard Laager <rlaager@wiktel.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #12129
This commit is contained in:
+205
-211
@@ -1,3 +1,4 @@
|
||||
.\"
|
||||
.\" This file and its contents are supplied under the terms of the
|
||||
.\" Common Development and Distribution License ("CDDL"), version 1.0.
|
||||
.\" You may only use this file in accordance with the terms of version
|
||||
@@ -7,17 +8,17 @@
|
||||
.\" source. A copy of the CDDL is also available via the Internet at
|
||||
.\" http://www.illumos.org/license/CDDL.
|
||||
.\"
|
||||
.\"
|
||||
.\" Copyright (c) 2016, 2019 by Delphix. All Rights Reserved.
|
||||
.\" Copyright (c) 2019, 2020 by Christian Schwarz. All Rights Reserved.
|
||||
.\" Copyright 2020 Joyent, Inc.
|
||||
.\"
|
||||
.Dd January 26, 2021
|
||||
.Dd May 27, 2021
|
||||
.Dt ZFS-PROGRAM 8
|
||||
.Os
|
||||
.
|
||||
.Sh NAME
|
||||
.Nm zfs-program
|
||||
.Nd executes ZFS channel programs
|
||||
.Nd execute ZFS channel programs
|
||||
.Sh SYNOPSIS
|
||||
.Nm zfs
|
||||
.Cm program
|
||||
@@ -26,7 +27,8 @@
|
||||
.Op Fl m Ar memory-limit
|
||||
.Ar pool
|
||||
.Ar script
|
||||
.\".Op Ar optional arguments to channel program
|
||||
.Op Ar script arguments
|
||||
.
|
||||
.Sh DESCRIPTION
|
||||
The ZFS channel program interface allows ZFS administrative operations to be
|
||||
run programmatically as a Lua script.
|
||||
@@ -37,22 +39,22 @@ Channel programs may only be run with root privileges.
|
||||
.Pp
|
||||
A modified version of the Lua 5.2 interpreter is used to run channel program
|
||||
scripts.
|
||||
The Lua 5.2 manual can be found at:
|
||||
.Bd -centered -offset indent
|
||||
The Lua 5.2 manual can be found at
|
||||
.Lk http://www.lua.org/manual/5.2/
|
||||
.Ed
|
||||
.Pp
|
||||
The channel program given by
|
||||
.Ar script
|
||||
will be run on
|
||||
.Ar pool ,
|
||||
and any attempts to access or modify other pools will cause an error.
|
||||
.
|
||||
.Sh OPTIONS
|
||||
.Bl -tag -width "-t"
|
||||
.It Fl j
|
||||
Display channel program output in JSON format. When this flag is specified and
|
||||
standard output is empty - channel program encountered an error. The details of
|
||||
such an error will be printed to standard error in plain text.
|
||||
Display channel program output in JSON format.
|
||||
When this flag is specified and standard output is empty -
|
||||
channel program encountered an error.
|
||||
The details of such an error will be printed to standard error in plain text.
|
||||
.It Fl n
|
||||
Executes a read-only channel program, which runs faster.
|
||||
The program cannot change on-disk state by calling functions from the
|
||||
@@ -78,15 +80,17 @@ All remaining argument strings will be passed directly to the Lua script as
|
||||
described in the
|
||||
.Sx LUA INTERFACE
|
||||
section below.
|
||||
.
|
||||
.Sh LUA INTERFACE
|
||||
A channel program can be invoked either from the command line, or via a library
|
||||
call to
|
||||
.Fn lzc_channel_program .
|
||||
.
|
||||
.Ss Arguments
|
||||
Arguments passed to the channel program are converted to a Lua table.
|
||||
If invoked from the command line, extra arguments to the Lua script will be
|
||||
accessible as an array stored in the argument table with the key 'argv':
|
||||
.Bd -literal -offset indent
|
||||
.Bd -literal -compact -offset indent
|
||||
args = ...
|
||||
argv = args["argv"]
|
||||
-- argv == {1="arg1", 2="arg2", ...}
|
||||
@@ -95,7 +99,7 @@ argv = args["argv"]
|
||||
If invoked from the libZFS interface, an arbitrary argument list can be
|
||||
passed to the channel program, which is accessible via the same
|
||||
"..." syntax in Lua:
|
||||
.Bd -literal -offset indent
|
||||
.Bd -literal -compact -offset indent
|
||||
args = ...
|
||||
-- args == {"foo"="bar", "baz"={...}, ...}
|
||||
.Ed
|
||||
@@ -108,37 +112,35 @@ in
|
||||
in a C array passed to a channel program will be stored in
|
||||
.Va arr[1]
|
||||
when accessed from Lua.
|
||||
.
|
||||
.Ss Return Values
|
||||
Lua return statements take the form:
|
||||
.Bd -literal -offset indent
|
||||
return ret0, ret1, ret2, ...
|
||||
.Ed
|
||||
.Dl return ret0, ret1, ret2, ...
|
||||
.Pp
|
||||
Return statements returning multiple values are permitted internally in a
|
||||
channel program script, but attempting to return more than one value from the
|
||||
top level of the channel program is not permitted and will throw an error.
|
||||
However, tables containing multiple values can still be returned.
|
||||
If invoked from the command line, a return statement:
|
||||
.Bd -literal -offset indent
|
||||
.Bd -literal -compact -offset indent
|
||||
a = {foo="bar", baz=2}
|
||||
return a
|
||||
.Ed
|
||||
.Pp
|
||||
Will be output formatted as:
|
||||
.Bd -literal -offset indent
|
||||
.Bd -literal -compact -offset indent
|
||||
Channel program fully executed with return value:
|
||||
return:
|
||||
baz: 2
|
||||
foo: 'bar'
|
||||
.Ed
|
||||
.
|
||||
.Ss Fatal Errors
|
||||
If the channel program encounters a fatal error while running, a non-zero exit
|
||||
status will be returned.
|
||||
If more information about the error is available, a singleton list will be
|
||||
returned detailing the error:
|
||||
.Bd -literal -offset indent
|
||||
error: "error string, including Lua stack trace"
|
||||
.Ed
|
||||
.Dl error: \&"error string, including Lua stack trace"
|
||||
.Pp
|
||||
If a fatal error is returned, the channel program may have not executed at all,
|
||||
may have partially executed, or may have fully executed but failed to pass a
|
||||
@@ -162,6 +164,7 @@ return an error code and the channel program continues executing.
|
||||
See the
|
||||
.Sx ZFS API
|
||||
section below for function-specific details on error return codes.
|
||||
.
|
||||
.Ss Lua to C Value Conversion
|
||||
When invoking a channel program via the libZFS interface, it is necessary to
|
||||
translate arguments and return values from Lua values to their C equivalents,
|
||||
@@ -171,37 +174,37 @@ There is a correspondence between nvlist values in C and Lua tables.
|
||||
A Lua table which is returned from the channel program will be recursively
|
||||
converted to an nvlist, with table values converted to their natural
|
||||
equivalents:
|
||||
.Bd -literal -offset indent
|
||||
string -> string
|
||||
number -> int64
|
||||
boolean -> boolean_value
|
||||
nil -> boolean (no value)
|
||||
table -> nvlist
|
||||
.Ed
|
||||
.TS
|
||||
cw3 l c l .
|
||||
string -> string
|
||||
number -> int64
|
||||
boolean -> boolean_value
|
||||
nil -> boolean (no value)
|
||||
table -> nvlist
|
||||
.TE
|
||||
.Pp
|
||||
Likewise, table keys are replaced by string equivalents as follows:
|
||||
.Bd -literal -offset indent
|
||||
string -> no change
|
||||
number -> signed decimal string ("%lld")
|
||||
boolean -> "true" | "false"
|
||||
.Ed
|
||||
.TS
|
||||
cw3 l c l .
|
||||
string -> no change
|
||||
number -> signed decimal string ("%lld")
|
||||
boolean -> "true" | "false"
|
||||
.TE
|
||||
.Pp
|
||||
Any collision of table key strings (for example, the string "true" and a
|
||||
true boolean value) will cause a fatal error.
|
||||
.Pp
|
||||
Lua numbers are represented internally as signed 64-bit integers.
|
||||
.
|
||||
.Sh LUA STANDARD LIBRARY
|
||||
The following Lua built-in base library functions are available:
|
||||
.Bd -literal -offset indent
|
||||
assert rawlen
|
||||
collectgarbage rawget
|
||||
error rawset
|
||||
getmetatable select
|
||||
ipairs setmetatable
|
||||
next tonumber
|
||||
pairs tostring
|
||||
rawequal type
|
||||
.Ed
|
||||
.TS
|
||||
cw3 l l l l .
|
||||
assert rawlen collectgarbage rawget
|
||||
error rawset getmetatable select
|
||||
ipairs setmetatable next tonumber
|
||||
pairs tostring rawequal type
|
||||
.TE
|
||||
.Pp
|
||||
All functions in the
|
||||
.Em coroutine ,
|
||||
@@ -214,15 +217,13 @@ manual.
|
||||
.Pp
|
||||
The following functions base library functions have been disabled and are
|
||||
not available for use in channel programs:
|
||||
.Bd -literal -offset indent
|
||||
dofile
|
||||
loadfile
|
||||
load
|
||||
pcall
|
||||
print
|
||||
xpcall
|
||||
.Ed
|
||||
.TS
|
||||
cw3 l l l l l l .
|
||||
dofile loadfile load pcall print xpcall
|
||||
.TE
|
||||
.
|
||||
.Sh ZFS API
|
||||
.
|
||||
.Ss Function Arguments
|
||||
Each API function takes a fixed set of required positional arguments and
|
||||
optional keyword arguments.
|
||||
@@ -231,22 +232,17 @@ For example, the destroy function takes a single positional string argument
|
||||
argument.
|
||||
When using parentheses to specify the arguments to a Lua function, only
|
||||
positional arguments can be used:
|
||||
.Bd -literal -offset indent
|
||||
zfs.sync.destroy("rpool@snap")
|
||||
.Ed
|
||||
.Dl Sy zfs.sync.destroy Ns Pq \&"rpool@snap"
|
||||
.Pp
|
||||
To use keyword arguments, functions must be called with a single argument that
|
||||
is a Lua table containing entries mapping integers to positional arguments and
|
||||
strings to keyword arguments:
|
||||
.Bd -literal -offset indent
|
||||
zfs.sync.destroy({1="rpool@snap", defer=true})
|
||||
.Ed
|
||||
.Dl Sy zfs.sync.destroy Ns Pq {1="rpool@snap", defer=true}
|
||||
.Pp
|
||||
The Lua language allows curly braces to be used in place of parenthesis as
|
||||
syntactic sugar for this calling convention:
|
||||
.Bd -literal -offset indent
|
||||
zfs.sync.snapshot{"rpool@snap", defer=true}
|
||||
.Ed
|
||||
.Dl Sy zfs.sync.snapshot Ns {"rpool@snap", defer=true}
|
||||
.
|
||||
.Ss Function Return Values
|
||||
If an API function succeeds, it returns 0.
|
||||
If it fails, it returns an error code and the channel program continues
|
||||
@@ -261,13 +257,11 @@ Lua table, or Nil if no error details were returned.
|
||||
Different keys will exist in the error details table depending on the function
|
||||
and error case.
|
||||
Any such function may be called expecting a single return value:
|
||||
.Bd -literal -offset indent
|
||||
errno = zfs.sync.promote(dataset)
|
||||
.Ed
|
||||
.Dl errno = Sy zfs.sync.promote Ns Pq dataset
|
||||
.Pp
|
||||
Or, the error details can be retrieved:
|
||||
.Bd -literal -offset indent
|
||||
errno, details = zfs.sync.promote(dataset)
|
||||
.Bd -literal -compact -offset indent
|
||||
.No errno, details = Sy zfs.sync.promote Ns Pq dataset
|
||||
if (errno == EEXIST) then
|
||||
assert(details ~= Nil)
|
||||
list_of_conflicting_snapshots = details
|
||||
@@ -276,48 +270,46 @@ end
|
||||
.Pp
|
||||
The following global aliases for API function error return codes are defined
|
||||
for use in channel programs:
|
||||
.Bd -literal -offset indent
|
||||
EPERM ECHILD ENODEV ENOSPC
|
||||
ENOENT EAGAIN ENOTDIR ESPIPE
|
||||
ESRCH ENOMEM EISDIR EROFS
|
||||
EINTR EACCES EINVAL EMLINK
|
||||
EIO EFAULT ENFILE EPIPE
|
||||
ENXIO ENOTBLK EMFILE EDOM
|
||||
E2BIG EBUSY ENOTTY ERANGE
|
||||
ENOEXEC EEXIST ETXTBSY EDQUOT
|
||||
EBADF EXDEV EFBIG
|
||||
.Ed
|
||||
.TS
|
||||
cw3 l l l l l l l .
|
||||
EPERM ECHILD ENODEV ENOSPC ENOENT EAGAIN ENOTDIR
|
||||
ESPIPE ESRCH ENOMEM EISDIR EROFS EINTR EACCES
|
||||
EINVAL EMLINK EIO EFAULT ENFILE EPIPE ENXIO
|
||||
ENOTBLK EMFILE EDOM E2BIG EBUSY ENOTTY ERANGE
|
||||
ENOEXEC EEXIST ETXTBSY EDQUOT EBADF EXDEV EFBIG
|
||||
.TE
|
||||
.
|
||||
.Ss API Functions
|
||||
For detailed descriptions of the exact behavior of any zfs administrative
|
||||
For detailed descriptions of the exact behavior of any ZFS administrative
|
||||
operations, see the main
|
||||
.Xr zfs 8
|
||||
manual page.
|
||||
.Bl -tag -width "xx"
|
||||
.It Em zfs.debug(msg)
|
||||
.It Fn zfs.debug msg
|
||||
Record a debug message in the zfs_dbgmsg log.
|
||||
A log of these messages can be printed via mdb's "::zfs_dbgmsg" command, or
|
||||
can be monitored live by running:
|
||||
.Bd -literal -offset indent
|
||||
dtrace -n 'zfs-dbgmsg{trace(stringof(arg0))}'
|
||||
.Ed
|
||||
can be monitored live by running
|
||||
.Dl dtrace -n 'zfs-dbgmsg{trace(stringof(arg0))}'
|
||||
.Pp
|
||||
msg (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "property (string)"
|
||||
.It Ar msg Pq string
|
||||
Debug message to be printed.
|
||||
.Ed
|
||||
.It Em zfs.exists(dataset)
|
||||
.El
|
||||
.It Fn zfs.exists dataset
|
||||
Returns true if the given dataset exists, or false if it doesn't.
|
||||
A fatal error will be thrown if the dataset is not in the target pool.
|
||||
That is, in a channel program running on rpool,
|
||||
zfs.exists("rpool/nonexistent_fs") returns false, but
|
||||
zfs.exists("somepool/fs_that_may_exist") will error.
|
||||
.Sy zfs.exists Ns Pq \&"rpool/nonexistent_fs"
|
||||
returns false, but
|
||||
.Sy zfs.exists Ns Pq \&"somepool/fs_that_may_exist"
|
||||
will error.
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "property (string)"
|
||||
.It Ar dataset Pq string
|
||||
Dataset to check for existence.
|
||||
Must be in the target pool.
|
||||
.Ed
|
||||
.It Em zfs.get_prop(dataset, property)
|
||||
.El
|
||||
.It Fn zfs.get_prop dataset property
|
||||
Returns two values.
|
||||
First, a string, number or table containing the property value for the given
|
||||
dataset.
|
||||
@@ -326,22 +318,25 @@ dataset in which it was set or nil if it is readonly).
|
||||
Throws a Lua error if the dataset is invalid or the property doesn't exist.
|
||||
Note that Lua only supports int64 number types whereas ZFS number properties
|
||||
are uint64.
|
||||
This means very large values (like guid) may wrap around and appear negative.
|
||||
This means very large values (like GUIDs) may wrap around and appear negative.
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "property (string)"
|
||||
.It Ar dataset Pq string
|
||||
Filesystem or snapshot path to retrieve properties from.
|
||||
.Ed
|
||||
.Pp
|
||||
property (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.It Ar property Pq string
|
||||
Name of property to retrieve.
|
||||
All filesystem, snapshot and volume properties are supported except
|
||||
for 'mounted' and 'iscsioptions.'
|
||||
Also supports the 'written@snap' and 'written#bookmark' properties and
|
||||
the '<user|group><quota|used>@id' properties, though the id must be in numeric
|
||||
form.
|
||||
.Ed
|
||||
All filesystem, snapshot and volume properties are supported except for
|
||||
.Sy mounted
|
||||
and
|
||||
.Sy iscsioptions .
|
||||
Also supports the
|
||||
.Sy written@ Ns Ar snap
|
||||
and
|
||||
.Sy written# Ns Ar bookmark
|
||||
properties and the
|
||||
.Ao Sy user Ns | Ns Sy group Ac Ns Ao Sy quota Ns | Ns Sy used Ac Ns Sy @ Ns Ar id
|
||||
properties, though the id must be in numeric form.
|
||||
.El
|
||||
.El
|
||||
.Bl -tag -width "xx"
|
||||
.It Sy zfs.sync submodule
|
||||
@@ -350,86 +345,73 @@ They are executed in "syncing context".
|
||||
.Pp
|
||||
The available sync submodule functions are as follows:
|
||||
.Bl -tag -width "xx"
|
||||
.It Em zfs.sync.destroy(dataset, [defer=true|false])
|
||||
.It Sy zfs.sync.destroy Ns Pq Ar dataset , Op Ar defer Ns = Ns Sy true Ns | Ns Sy false
|
||||
Destroy the given dataset.
|
||||
Returns 0 on successful destroy, or a nonzero error code if the dataset could
|
||||
not be destroyed (for example, if the dataset has any active children or
|
||||
clones).
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "newbookmark (string)"
|
||||
.It Ar dataset Pq string
|
||||
Filesystem or snapshot to be destroyed.
|
||||
.Ed
|
||||
.Pp
|
||||
[optional] defer (boolean)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.It Op Ar defer Pq boolean
|
||||
Valid only for destroying snapshots.
|
||||
If set to true, and the snapshot has holds or clones, allows the snapshot to be
|
||||
marked for deferred deletion rather than failing.
|
||||
.Ed
|
||||
.It Em zfs.sync.inherit(dataset, property)
|
||||
.El
|
||||
.It Fn zfs.sync.inherit dataset property
|
||||
Clears the specified property in the given dataset, causing it to be inherited
|
||||
from an ancestor, or restored to the default if no ancestor property is set.
|
||||
The
|
||||
.Ql zfs inherit -S
|
||||
.Nm zfs Cm inherit Fl S
|
||||
option has not been implemented.
|
||||
Returns 0 on success, or a nonzero error code if the property could not be
|
||||
cleared.
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "newbookmark (string)"
|
||||
.It Ar dataset Pq string
|
||||
Filesystem or snapshot containing the property to clear.
|
||||
.Ed
|
||||
.Pp
|
||||
property (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.It Ar property Pq string
|
||||
The property to clear.
|
||||
Allowed properties are the same as those for the
|
||||
.Nm zfs Cm inherit
|
||||
command.
|
||||
.Ed
|
||||
.It Em zfs.sync.promote(dataset)
|
||||
.El
|
||||
.It Fn zfs.sync.promote dataset
|
||||
Promote the given clone to a filesystem.
|
||||
Returns 0 on successful promotion, or a nonzero error code otherwise.
|
||||
If EEXIST is returned, the second return value will be an array of the clone's
|
||||
snapshots whose names collide with snapshots of the parent filesystem.
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "newbookmark (string)"
|
||||
.It Ar dataset Pq string
|
||||
Clone to be promoted.
|
||||
.Ed
|
||||
.It Em zfs.sync.rollback(filesystem)
|
||||
.El
|
||||
.It Fn zfs.sync.rollback filesystem
|
||||
Rollback to the previous snapshot for a dataset.
|
||||
Returns 0 on successful rollback, or a nonzero error code otherwise.
|
||||
Rollbacks can be performed on filesystems or zvols, but not on snapshots
|
||||
or mounted datasets.
|
||||
EBUSY is returned in the case where the filesystem is mounted.
|
||||
.Pp
|
||||
filesystem (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "newbookmark (string)"
|
||||
.It Ar filesystem Pq string
|
||||
Filesystem to rollback.
|
||||
.Ed
|
||||
.It Em zfs.sync.set_prop(dataset, property, value)
|
||||
.El
|
||||
.It Fn zfs.sync.set_prop dataset property value
|
||||
Sets the given property on a dataset.
|
||||
Currently only user properties are supported.
|
||||
Returns 0 if the property was set, or a nonzero error code otherwise.
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "newbookmark (string)"
|
||||
.It Ar dataset Pq string
|
||||
The dataset where the property will be set.
|
||||
.Ed
|
||||
.Pp
|
||||
property (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.It Ar property Pq string
|
||||
The property to set.
|
||||
Only user properties are supported.
|
||||
.Ed
|
||||
.Pp
|
||||
value (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.It Ar value Pq string
|
||||
The value of the property to be set.
|
||||
.Ed
|
||||
.It Em zfs.sync.snapshot(dataset)
|
||||
.El
|
||||
.It Fn zfs.sync.snapshot dataset
|
||||
Create a snapshot of a filesystem.
|
||||
Returns 0 if the snapshot was successfully created,
|
||||
and a nonzero error code otherwise.
|
||||
@@ -437,132 +419,142 @@ and a nonzero error code otherwise.
|
||||
Note: Taking a snapshot will fail on any pool older than legacy version 27.
|
||||
To enable taking snapshots from ZCP scripts, the pool must be upgraded.
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "newbookmark (string)"
|
||||
.It Ar dataset Pq string
|
||||
Name of snapshot to create.
|
||||
.Ed
|
||||
.It Em zfs.sync.bookmark(source, newbookmark)
|
||||
.El
|
||||
.It Fn zfs.sync.bookmark source newbookmark
|
||||
Create a bookmark of an existing source snapshot or bookmark.
|
||||
Returns 0 if the new bookmark was successfully created,
|
||||
and a nonzero error code otherwise.
|
||||
.Pp
|
||||
Note: Bookmarking requires the corresponding pool feature to be enabled.
|
||||
.Pp
|
||||
source (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "newbookmark (string)"
|
||||
.It Ar source Pq string
|
||||
Full name of the existing snapshot or bookmark.
|
||||
.Ed
|
||||
.Pp
|
||||
newbookmark (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.It Ar newbookmark Pq string
|
||||
Full name of the new bookmark.
|
||||
.El
|
||||
.Ed
|
||||
.El
|
||||
.It Sy zfs.check submodule
|
||||
For each function in the zfs.sync submodule, there is a corresponding zfs.check
|
||||
For each function in the
|
||||
.Sy zfs.sync
|
||||
submodule, there is a corresponding
|
||||
.Sy zfs.check
|
||||
function which performs a "dry run" of the same operation.
|
||||
Each takes the same arguments as its zfs.sync counterpart and returns 0 if the
|
||||
operation would succeed, or a non-zero error code if it would fail, along with
|
||||
any other error details.
|
||||
Each takes the same arguments as its
|
||||
.Sy zfs.sync
|
||||
counterpart and returns 0 if the operation would succeed,
|
||||
or a non-zero error code if it would fail, along with any other error details.
|
||||
That is, each has the same behavior as the corresponding sync function except
|
||||
for actually executing the requested change.
|
||||
For example,
|
||||
.Em zfs.check.destroy("fs")
|
||||
.Fn zfs.check.destroy \&"fs"
|
||||
returns 0 if
|
||||
.Em zfs.sync.destroy("fs")
|
||||
.Fn zfs.sync.destroy \&"fs"
|
||||
would successfully destroy the dataset.
|
||||
.Pp
|
||||
The available zfs.check functions are:
|
||||
.Bl -tag -width "xx"
|
||||
.It Em zfs.check.destroy(dataset, [defer=true|false])
|
||||
.It Em zfs.check.promote(dataset)
|
||||
.It Em zfs.check.rollback(filesystem)
|
||||
.It Em zfs.check.set_property(dataset, property, value)
|
||||
.It Em zfs.check.snapshot(dataset)
|
||||
The available
|
||||
.Sy zfs.check
|
||||
functions are:
|
||||
.Bl -tag -compact -width "xx"
|
||||
.It Sy zfs.check.destroy Ns Pq Ar dataset , Op Ar defer Ns = Ns Sy true Ns | Ns Sy false
|
||||
.It Fn zfs.check.promote dataset
|
||||
.It Fn zfs.check.rollback filesystem
|
||||
.It Fn zfs.check.set_property dataset property value
|
||||
.It Fn zfs.check.snapshot dataset
|
||||
.El
|
||||
.It Sy zfs.list submodule
|
||||
The zfs.list submodule provides functions for iterating over datasets and
|
||||
properties.
|
||||
Rather than returning tables, these functions act as Lua iterators, and are
|
||||
generally used as follows:
|
||||
.Bd -literal -offset indent
|
||||
for child in zfs.list.children("rpool") do
|
||||
.Bd -literal -compact -offset indent
|
||||
.No for child in Fn zfs.list.children \&"rpool" No do
|
||||
...
|
||||
end
|
||||
.Ed
|
||||
.Pp
|
||||
The available zfs.list functions are:
|
||||
The available
|
||||
.Sy zfs.list
|
||||
functions are:
|
||||
.Bl -tag -width "xx"
|
||||
.It Em zfs.list.clones(snapshot)
|
||||
.It Fn zfs.list.clones snapshot
|
||||
Iterate through all clones of the given snapshot.
|
||||
.Pp
|
||||
snapshot (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "snapshot (string)"
|
||||
.It Ar snapshot Pq string
|
||||
Must be a valid snapshot path in the current pool.
|
||||
.Ed
|
||||
.It Em zfs.list.snapshots(dataset)
|
||||
.El
|
||||
.It Fn zfs.list.snapshots dataset
|
||||
Iterate through all snapshots of the given dataset.
|
||||
Each snapshot is returned as a string containing the full dataset name, e.g.
|
||||
"pool/fs@snap".
|
||||
Each snapshot is returned as a string containing the full dataset name,
|
||||
e.g. "pool/fs@snap".
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "snapshot (string)"
|
||||
.It Ar dataset Pq string
|
||||
Must be a valid filesystem or volume.
|
||||
.Ed
|
||||
.It Em zfs.list.children(dataset)
|
||||
.El
|
||||
.It Fn zfs.list.children dataset
|
||||
Iterate through all direct children of the given dataset.
|
||||
Each child is returned as a string containing the full dataset name, e.g.
|
||||
"pool/fs/child".
|
||||
Each child is returned as a string containing the full dataset name,
|
||||
e.g. "pool/fs/child".
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "snapshot (string)"
|
||||
.It Ar dataset Pq string
|
||||
Must be a valid filesystem or volume.
|
||||
.Ed
|
||||
.It Em zfs.list.bookmarks(dataset)
|
||||
Iterate through all bookmarks of the given dataset. Each bookmark is returned
|
||||
as a string containing the full dataset name, e.g. "pool/fs#bookmark".
|
||||
.El
|
||||
.It Fn zfs.list.bookmarks dataset
|
||||
Iterate through all bookmarks of the given dataset.
|
||||
Each bookmark is returned as a string containing the full dataset name,
|
||||
e.g. "pool/fs#bookmark".
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "snapshot (string)"
|
||||
.It Ar dataset Pq string
|
||||
Must be a valid filesystem or volume.
|
||||
.Ed
|
||||
.It Em zfs.list.holds(snapshot)
|
||||
Iterate through all user holds on the given snapshot. Each hold is returned
|
||||
.El
|
||||
.It Fn zfs.list.holds snapshot
|
||||
Iterate through all user holds on the given snapshot.
|
||||
Each hold is returned
|
||||
as a pair of the hold's tag and the timestamp (in seconds since the epoch) at
|
||||
which it was created.
|
||||
.Pp
|
||||
snapshot (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "snapshot (string)"
|
||||
.It Ar snapshot Pq string
|
||||
Must be a valid snapshot.
|
||||
.Ed
|
||||
.It Em zfs.list.properties(dataset)
|
||||
.El
|
||||
.It Fn zfs.list.properties dataset
|
||||
An alias for zfs.list.user_properties (see relevant entry).
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "snapshot (string)"
|
||||
.It Ar dataset Pq string
|
||||
Must be a valid filesystem, snapshot, or volume.
|
||||
.Ed
|
||||
.It Em zfs.list.user_properties(dataset)
|
||||
Iterate through all user properties for the given dataset. For each
|
||||
step of the iteration, output the property name, its value, and its source.
|
||||
.El
|
||||
.It Fn zfs.list.user_properties dataset
|
||||
Iterate through all user properties for the given dataset.
|
||||
For each step of the iteration, output the property name, its value,
|
||||
and its source.
|
||||
Throws a Lua error if the dataset is invalid.
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "snapshot (string)"
|
||||
.It Ar dataset Pq string
|
||||
Must be a valid filesystem, snapshot, or volume.
|
||||
.Ed
|
||||
.It Em zfs.list.system_properties(dataset)
|
||||
.El
|
||||
.It Fn zfs.list.system_properties dataset
|
||||
Returns an array of strings, the names of the valid system (non-user defined)
|
||||
properties for the given dataset.
|
||||
Throws a Lua error if the dataset is invalid.
|
||||
.Pp
|
||||
dataset (string)
|
||||
.Bd -ragged -compact -offset "xxxx"
|
||||
.Bl -tag -compact -width "snapshot (string)"
|
||||
.It Ar dataset Pq string
|
||||
Must be a valid filesystem, snapshot or volume.
|
||||
.Ed
|
||||
.El
|
||||
.El
|
||||
.El
|
||||
.
|
||||
.Sh EXAMPLES
|
||||
.
|
||||
.Ss Example 1
|
||||
The following channel program recursively destroys a filesystem and all its
|
||||
snapshots and children in a naive manner.
|
||||
@@ -579,6 +571,7 @@ function destroy_recursive(root)
|
||||
end
|
||||
destroy_recursive("pool/somefs")
|
||||
.Ed
|
||||
.
|
||||
.Ss Example 2
|
||||
A more verbose and robust version of the same channel program, which
|
||||
properly detects and reports errors, and also takes the dataset to destroy
|
||||
@@ -617,6 +610,7 @@ results["succeeded"] = succeeded
|
||||
results["failed"] = failed
|
||||
return results
|
||||
.Ed
|
||||
.
|
||||
.Ss Example 3
|
||||
The following function performs a forced promote operation by attempting to
|
||||
promote the given clone and destroying any conflicting snapshots.
|
||||
|
||||
Reference in New Issue
Block a user