€•C6      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ0/translations/zh_CN/admin-guide/nfs/nfs-idmapper”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/zh_TW/admin-guide/nfs/nfs-idmapper”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/it_IT/admin-guide/nfs/nfs-idmapper”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/ja_JP/admin-guide/nfs/nfs-idmapper”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/ko_KR/admin-guide/nfs/nfs-idmapper”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/sp_SP/admin-guide/nfs/nfs-idmapper”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒNFS ID Mapper”h]”hŒNFS ID Mapper”…””}”(hh¨hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hh£hžhhŸŒJ/var/lib/git/docbuild/linux/Documentation/admin-guide/nfs/nfs-idmapper.rst”h KubhŒ	paragraph”“”)”}”(hX^  Id mapper is used by NFS to translate user and group ids into names, and to
translate user and group names into ids.  Part of this translation involves
performing an upcall to userspace to request the information.  There are two
ways NFS could obtain this information: placing a call to /sbin/request-key
or by placing a call to the rpc.idmap daemon.”h]”hX^  Id mapper is used by NFS to translate user and group ids into names, and to
translate user and group names into ids.  Part of this translation involves
performing an upcall to userspace to request the information.  There are two
ways NFS could obtain this information: placing a call to /sbin/request-key
or by placing a call to the rpc.idmap daemon.”…””}”(hh¹hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hX7  NFS will attempt to call /sbin/request-key first.  If this succeeds, the
result will be cached using the generic request-key cache.  This call should
only fail if /etc/request-key.conf is not configured for the id_resolver key
type, see the "Configuring" section below if you wish to use the request-key
method.”h]”hX;  NFS will attempt to call /sbin/request-key first.  If this succeeds, the
result will be cached using the generic request-key cache.  This call should
only fail if /etc/request-key.conf is not configured for the id_resolver key
type, see the â€œConfiguringâ€ section below if you wish to use the request-key
method.”…””}”(hhÇhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒöIf the call to /sbin/request-key fails (if /etc/request-key.conf is not
configured with the id_resolver key type), then the idmapper will ask the
legacy rpc.idmap daemon for the id mapping.  This result will be stored
in a custom NFS idmap cache.”h]”hŒöIf the call to /sbin/request-key fails (if /etc/request-key.conf is not
configured with the id_resolver key type), then the idmapper will ask the
legacy rpc.idmap daemon for the id mapping.  This result will be stored
in a custom NFS idmap cache.”…””}”(hhÕhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¢)”}”(hhh]”(h§)”}”(hŒConfiguring”h]”hŒConfiguring”…””}”(hhæhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hhãhžhhŸh¶h Kubh¸)”}”(hŒˆThe file /etc/request-key.conf will need to be modified so /sbin/request-key can
direct the upcall.  The following line should be added:”h]”hŒˆThe file /etc/request-key.conf will need to be modified so /sbin/request-key can
direct the upcall.  The following line should be added:”…””}”(hhôhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khhãhžhubh¸)”}”(hŒþ``#OP   TYPE    DESCRIPTION     CALLOUT INFO    PROGRAM ARG1 ARG2 ARG3 ...``
``#======       ======= =============== =============== ===============================``
``create        id_resolver     *       *               /usr/sbin/nfs.idmap %k %d 600``”h]”(hŒliteral”“”)”}”(hŒL``#OP   TYPE    DESCRIPTION     CALLOUT INFO    PROGRAM ARG1 ARG2 ARG3 ...``”h]”hŒH#OP   TYPE    DESCRIPTION     CALLOUT INFO    PROGRAM ARG1 ARG2 ARG3 ...”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j  hj  ubhŒ
”…””}”(hj  hžhhŸNh Nubj  )”}”(hŒY``#======       ======= =============== =============== ===============================``”h]”hŒU#======       ======= =============== =============== ===============================”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j  hj  ubhŒ
”…””}”hj  sbj  )”}”(hŒW``create        id_resolver     *       *               /usr/sbin/nfs.idmap %k %d 600``”h]”hŒScreate        id_resolver     *       *               /usr/sbin/nfs.idmap %k %d 600”…””}”(hj,  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j  hj  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khhãhžhubh¸)”}”(hX$  This will direct all id_resolver requests to the program /usr/sbin/nfs.idmap.
The last parameter, 600, defines how many seconds into the future the key will
expire.  This parameter is optional for /usr/sbin/nfs.idmap.  When the timeout
is not specified, nfs.idmap will default to 600 seconds.”h]”hX$  This will direct all id_resolver requests to the program /usr/sbin/nfs.idmap.
The last parameter, 600, defines how many seconds into the future the key will
expire.  This parameter is optional for /usr/sbin/nfs.idmap.  When the timeout
is not specified, nfs.idmap will default to 600 seconds.”…””}”(hj@  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K"hhãhžhubh¸)”}”(hŒ%id mapper uses for key descriptions::”h]”hŒ$id mapper uses for key descriptions:”…””}”(hjN  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K'hhãhžhubhŒliteral_block”“”)”}”(hŒ¬  uid:  Find the UID for the given user
  gid:  Find the GID for the given group
 user:  Find the user  name for the given UID
group:  Find the group name for the given GID”h]”hŒ¬  uid:  Find the UID for the given user
  gid:  Find the GID for the given group
 user:  Find the user  name for the given UID
group:  Find the group name for the given GID”…””}”hj^  sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1j\  hŸh¶h K)hhãhžhubh¸)”}”(hŒÙYou can handle any of these individually, rather than using the generic upcall
program.  If you would like to use your own program for a uid lookup then you
would edit your request-key.conf so it look similar to this:”h]”hŒÙYou can handle any of these individually, rather than using the generic upcall
program.  If you would like to use your own program for a uid lookup then you
would edit your request-key.conf so it look similar to this:”…””}”(hjn  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K.hhãhžhubh¸)”}”(hXV  ``#OP   TYPE    DESCRIPTION     CALLOUT INFO    PROGRAM ARG1 ARG2 ARG3 ...``
``#======       ======= =============== =============== ===============================``
``create        id_resolver     uid:*   *               /some/other/program %k %d 600``
``create        id_resolver     *       *               /usr/sbin/nfs.idmap %k %d 600``”h]”(j  )”}”(hŒL``#OP   TYPE    DESCRIPTION     CALLOUT INFO    PROGRAM ARG1 ARG2 ARG3 ...``”h]”hŒH#OP   TYPE    DESCRIPTION     CALLOUT INFO    PROGRAM ARG1 ARG2 ARG3 ...”…””}”(hj€  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j  hj|  ubhŒ
”…””}”(hj|  hžhhŸNh Nubj  )”}”(hŒY``#======       ======= =============== =============== ===============================``”h]”hŒU#======       ======= =============== =============== ===============================”…””}”(hj’  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j  hj|  ubhŒ
”…””}”hj|  sbj  )”}”(hŒW``create        id_resolver     uid:*   *               /some/other/program %k %d 600``”h]”hŒScreate        id_resolver     uid:*   *               /some/other/program %k %d 600”…””}”(hj¤  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j  hj|  ubhŒ
”…””}”hj|  sbj  )”}”(hŒW``create        id_resolver     *       *               /usr/sbin/nfs.idmap %k %d 600``”h]”hŒScreate        id_resolver     *       *               /usr/sbin/nfs.idmap %k %d 600”…””}”(hj¶  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j  hj|  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K2hhãhžhubh¸)”}”(hX  Notice that the new line was added above the line for the generic program.
request-key will find the first matching line and corresponding program.  In
this case, /some/other/program will handle all uid lookups and
/usr/sbin/nfs.idmap will handle gid, user, and group lookups.”h]”hX  Notice that the new line was added above the line for the generic program.
request-key will find the first matching line and corresponding program.  In
this case, /some/other/program will handle all uid lookups and
/usr/sbin/nfs.idmap will handle gid, user, and group lookups.”…””}”(hjÊ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K8hhãhžhubh¸)”}”(hŒdSee Documentation/security/keys/request-key.rst for more information
about the request-key function.”h]”hŒdSee Documentation/security/keys/request-key.rst for more information
about the request-key function.”…””}”(hjØ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K=hhãhžhubeh}”(h]”Œconfiguring”ah ]”h"]”Œconfiguring”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kubh¢)”}”(hhh]”(h§)”}”(hŒ	nfs.idmap”h]”hŒ	nfs.idmap”…””}”(hjñ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjî  hžhhŸh¶h KBubh¸)”}”(hX.  nfs.idmap is designed to be called by request-key, and should not be run "by
hand".  This program takes two arguments, a serialized key and a key
description.  The serialized key is first converted into a key_serial_t, and
then passed as an argument to keyctl_instantiate (both are part of keyutils.h).”h]”hX2  nfs.idmap is designed to be called by request-key, and should not be run â€œby
handâ€.  This program takes two arguments, a serialized key and a key
description.  The serialized key is first converted into a key_serial_t, and
then passed as an argument to keyctl_instantiate (both are part of keyutils.h).”…””}”(hjÿ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KDhjî  hžhubh¸)”}”(hŒöThe actual lookups are performed by functions found in nfsidmap.h.  nfs.idmap
determines the correct function to call by looking at the first part of the
description string.  For example, a uid lookup description will appear as
"uid:user@domain".”h]”hŒúThe actual lookups are performed by functions found in nfsidmap.h.  nfs.idmap
determines the correct function to call by looking at the first part of the
description string.  For example, a uid lookup description will appear as
â€œuid:user@domainâ€.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KIhjî  hžhubh¸)”}”(hŒLnfs.idmap will return 0 if the key was instantiated, and non-zero otherwise.”h]”hŒLnfs.idmap will return 0 if the key was instantiated, and non-zero otherwise.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KNhjî  hžhubeh}”(h]”Œ	nfs-idmap”ah ]”h"]”Œ	nfs.idmap”ah$]”h&]”uh1h¡hh£hžhhŸh¶h KBubeh}”(h]”Œnfs-id-mapper”ah ]”h"]”Œnfs id mapper”ah$]”h&]”uh1h¡hhhžhhŸh¶h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h¶uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¦NŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
source_url”NŒtoc_backlinks”Œentry”Œfootnote_backlinks”KŒsectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒstrip_classes”NŒreport_level”KŒ
halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ	traceback”ˆŒinput_encoding”Œ	utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”j\  Œerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œlanguage_code”Œen”Œrecord_dependencies”NŒconfig”NŒ	id_prefix”hŒauto_id_prefix”Œid”Œdump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h¶Œ_destination”NŒ_config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒraw_enabled”KŒline_length_limit”M'Œpep_references”NŒpep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒrfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ	tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œsmart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œdocinfo_xform”KŒsectsubtitle_xform”‰Œimage_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(j6  j3  jë  jè  j.  j+  uŒ	nametypes”}”(j6  ‰jë  ‰j.  ‰uh}”(j3  h£jè  hãj+  jî  uŒfootnote_refs”}”Œcitation_refs”}”Œautofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ	footnotes”]”Œ	citations”]”Œautofootnote_start”KŒsymbol_footnote_start”K Œ
id_counter”Œcollections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œtransformer”NŒinclude_log”]”Œ
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