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Message-Id: <5523e5ad8da2c9b7af16c26e368f17804e8841cc.1577681894.git.dwlsalmeida@gmail.com>
Date: Mon, 30 Dec 2019 02:04:46 -0300
From: "Daniel W. S. Almeida" <dwlsalmeida@...il.com>
To: corbet@....net, mchehab+samsung@...nel.org
Cc: "Daniel W. S. Almeida" <dwlsalmeida@...il.com>,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
skhan@...uxfoundation.org,
linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH 4/5] Documentation: nfs: nfs41-server: convert to ReST
From: "Daniel W. S. Almeida" <dwlsalmeida@...il.com>
Convert nfs41-server.txt to ReST. The ASCII tables were converted to
csv-tables and not list-tables because the former is easier to export
from spreadsheets.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@...il.com>
---
Documentation/filesystems/nfs/index.rst | 1 +
.../filesystems/nfs/nfs41-server.rst | 181 ++++++++++++++++++
.../filesystems/nfs/nfs41-server.txt | 173 -----------------
3 files changed, 182 insertions(+), 173 deletions(-)
create mode 100644 Documentation/filesystems/nfs/nfs41-server.rst
delete mode 100644 Documentation/filesystems/nfs/nfs41-server.txt
diff --git a/Documentation/filesystems/nfs/index.rst b/Documentation/filesystems/nfs/index.rst
index 9d5365cbe2c3..a0a678af921b 100644
--- a/Documentation/filesystems/nfs/index.rst
+++ b/Documentation/filesystems/nfs/index.rst
@@ -9,3 +9,4 @@ NFS
pnfs
rpc-cache
rpc-server-gss
+ nfs41-server
diff --git a/Documentation/filesystems/nfs/nfs41-server.rst b/Documentation/filesystems/nfs/nfs41-server.rst
new file mode 100644
index 000000000000..e1e818ec3571
--- /dev/null
+++ b/Documentation/filesystems/nfs/nfs41-server.rst
@@ -0,0 +1,181 @@
+=============================
+NFSv4.1 Server Implementation
+=============================
+
+Server support for minorversion 1 can be controlled using the
+/proc/fs/nfsd/versions control file. The string output returned
+by reading this file will contain either "+4.1" or "-4.1"
+correspondingly.
+
+Currently, server support for minorversion 1 is enabled by default.
+It can be disabled at run time by writing the string "-4.1" to
+the /proc/fs/nfsd/versions control file. Note that to write this
+control file, the nfsd service must be taken down. You can use rpc.nfsd
+for this; see rpc.nfsd(8).
+
+(Warning: older servers will interpret "+4.1" and "-4.1" as "+4" and
+"-4", respectively. Therefore, code meant to work on both new and old
+kernels must turn 4.1 on or off *before* turning support for version 4
+on or off; rpc.nfsd does this correctly.)
+
+The NFSv4 minorversion 1 (NFSv4.1) implementation in nfsd is based
+on RFC 5661.
+
+From the many new features in NFSv4.1 the current implementation
+focuses on the mandatory-to-implement NFSv4.1 Sessions, providing
+"exactly once" semantics and better control and throttling of the
+resources allocated for each client.
+
+The table below, taken from the NFSv4.1 document, lists
+the operations that are mandatory to implement (REQ), optional
+(OPT), and NFSv4.0 operations that are required not to implement (MNI)
+in minor version 1. The first column indicates the operations that
+are not supported yet by the linux server implementation.
+
+The OPTIONAL features identified and their abbreviations are as follows:
+
+- **pNFS** Parallel NFS
+- **FDELG** File Delegations
+- **DDELG** Directory Delegations
+
+The following abbreviations indicate the linux server implementation status.
+
+- **I** Implemented NFSv4.1 operations.
+- **NS** Not Supported.
+- **NS\*** Unimplemented optional feature.
+
+Operations
+==========
+
+.. csv-table::
+ :header: "Implementation status", "Operation", "REQ, REC, OPT or NMI", "Feature (REQ, REC or OPT)", "Definition"
+ :widths: auto
+ :delim: ;
+
+ ;"ACCESS";"REQ";;"Section 18.1"
+ "I";"BACKCHANNEL_CTL";"REQ";;"Section 18.33"
+ "I";"BIND_CONN_TO_SESSION";"REQ";;"Section 18.34"
+ ;"CLOSE";"REQ";;"Section 18.2"
+ ;"COMMIT";"REQ";;"Section 18.3"
+ ;"CREATE";"REQ";;"Section 18.4"
+ "I";"CREATE_SESSION";"REQ";;"Section 18.36"
+ "NS*";"DELEGPURGE";"OPT";"FDELG (REQ)";"Section 18.5"
+ ;"DELEGRETURN";"OPT";"FDELG,";"Section 18.6"
+ ;;;"DDELG, pNFS";
+ ;;;"(REQ)";
+ "I";"DESTROY_CLIENTID";"REQ";;"Section 18.50"
+ "I";"DESTROY_SESSION";"REQ";;"Section 18.37"
+ "I";"EXCHANGE_ID";"REQ";;"Section 18.35"
+ "I";"FREE_STATEID";"REQ";;"Section 18.38"
+ ;"GETATTR";"REQ";;"Section 18.7"
+ "I";"GETDEVICEINFO";"OPT";"pNFS (REQ)";"Section 18.40"
+ "NS*";"GETDEVICELIST";"OPT";"pNFS (OPT)";"Section 18.41"
+ ;"GETFH";"REQ";;"Section 18.8"
+ "NS*";"GET_DIR_DELEGATION";"OPT";"DDELG (REQ)";"Section 18.39"
+ "I";"LAYOUTCOMMIT";"OPT";"pNFS (REQ)";"Section 18.42"
+ "I";"LAYOUTGET";"OPT";"pNFS (REQ)";"Section 18.43"
+ "I";"LAYOUTRETURN";"OPT";"pNFS (REQ)";"Section 18.44"
+ ;"LINK";"OPT";;"Section 18.9"
+ ;"LOCK";"REQ";;"Section 18.10"
+ ;"LOCKT";"REQ";;"Section 18.11"
+ ;"LOCKU";"REQ";;"Section 18.12"
+ ;"LOOKUP";"REQ";;"Section 18.13"
+ ;"LOOKUPP";"REQ";;"Section 18.14"
+ ;"NVERIFY";"REQ";;"Section 18.15"
+ ;"OPEN";"REQ";;"Section 18.16"
+ "NS*";"OPENATTR";"OPT";;"Section 18.17"
+ ;"OPEN_CONFIRM";"MNI";;"N/A"
+ ;"OPEN_DOWNGRADE";"REQ";;"Section 18.18"
+ ;"PUTFH";"REQ";;"Section 18.19"
+ ;"PUTPUBFH";"REQ";;"Section 18.20"
+ ;"PUTROOTFH";"REQ";;"Section 18.21"
+ ;"READ";"REQ";;"Section 18.22"
+ ;"READDIR";"REQ";;"Section 18.23"
+ ;"READLINK";"OPT";;"Section 18.24"
+ ;"RECLAIM_COMPLETE";"REQ";;"Section 18.51"
+ ;"RELEASE_LOCKOWNER";"MNI";;"N/A"
+ ;"REMOVE";"REQ";;"Section 18.25"
+ ;"RENAME";"REQ";;"Section 18.26"
+ ;"RENEW";"MNI";;"N/A"
+ ;"RESTOREFH";"REQ";;"Section 18.27"
+ ;"SAVEFH";"REQ";;"Section 18.28"
+ ;"SECINFO";"REQ";;"Section 18.29"
+ "I";"SECINFO_NO_NAME";"REC";"pNFS files";"Section 18.45,"
+ ;;;"layout (REQ)";"Section 13.12"
+ "I";"SEQUENCE";"REQ";;"Section 18.46"
+ ;"SETATTR";"REQ";;"Section 18.30"
+ ;"SETCLIENTID";"MNI";;"N/A"
+ ;"SETCLIENTID_CONFIRM";"MNI";;"N/A"
+ "NS";"SET_SSV";"REQ";;"Section 18.47"
+ "I";"TEST_STATEID";"REQ";;"Section 18.48"
+ ;"VERIFY";"REQ";;"Section 18.31"
+ "NS*";"WANT_DELEGATION";"OPT";"FDELG (OPT)";"Section 18.49"
+ ;"WRITE";"REQ";;"Section 18.32"
+
+
+Callback Operations
+===================
+
+.. csv-table::
+ :header: "Implementation status", "Operation", "REQ, REC, OPT or NMI", "Feature (REQ, REC or OPT)", "Definition"
+ :widths: auto
+ :delim: ;
+
+ ;"CB_GETATTR";"OPT";"FDELG (REQ)";"Section 20.1"
+ "I";"CB_LAYOUTRECALL";"OPT";"pNFS (REQ)";"Section 20.3"
+ "NS*";"CB_NOTIFY";"OPT";"DDELG (REQ)";"Section 20.4"
+ "NS*";"CB_NOTIFY_DEVICEID";"OPT";"pNFS (OPT)";"Section 20.12"
+ "NS*";"CB_NOTIFY_LOCK";"OPT";;"Section 20.11"
+ "NS*";"CB_PUSH_DELEG";"OPT";"FDELG (OPT)";"Section 20.5"
+ ;"CB_RECALL";"OPT";"FDELG,";"Section 20.2"
+ ;;;"DDELG, pNFS";
+ ;;;"(REQ)";
+ "NS*";"CB_RECALL_ANY";"OPT";"FDELG,";"Section 20.6"
+ ;;;"DDELG, pNFS";
+ ;;;"(REQ)";
+ "NS";"CB_RECALL_SLOT";"REQ";;"Section 20.8"
+ "NS*";"CB_RECALLABLE_OBJ_AVAIL";"OPT";"DDELG, pNFS";"Section 20.7"
+ ;;;"(REQ)";
+ "I";"CB_SEQUENCE";"OPT";"FDELG,";"Section 20.9"
+ ;;;"DDELG, pNFS";
+ ;;;"(REQ)";
+ "NS*";"CB_WANTS_CANCELLED";"OPT";"FDELG,";"Section 20.10"
+ ;;;"DDELG, pNFS";
+ ;;;"(REQ)";
+
+
+Implementation notes:
+=====================
+
+SSV:
+ The spec claims this is mandatory, but we don't actually know of any
+ implementations, so we're ignoring it for now. The server returns
+ NFS4ERR_ENCR_ALG_UNSUPP on EXCHANGE_ID, which should be future-proof.
+
+GSS on the backchannel:
+ Again, theoretically required but not widely implemented (in
+ particular, the current Linux client doesn't request it). We return
+ NFS4ERR_ENCR_ALG_UNSUPP on CREATE_SESSION.
+
+DELEGPURGE:
+ mandatory only for servers that support CLAIM_DELEGATE_PREV and/or
+ CLAIM_DELEG_PREV_FH (which allows clients to keep delegations that
+ persist across client reboots). Thus we need not implement this for
+ now.
+
+EXCHANGE_ID:
+ implementation ids are ignored
+
+CREATE_SESSION:
+ backchannel attributes are ignored
+
+SEQUENCE:
+ no support for dynamic slot table renegotiation (optional)
+
+Nonstandard compound limitations:
+ No support for a sessions fore channel RPC compound that requires both a
+ ca_maxrequestsize request and a ca_maxresponsesize reply, so we may
+ fail to live up to the promise we made in CREATE_SESSION fore channel
+ negotiation.
+
+See also http://wiki.linux-nfs.org/wiki/index.php/Server_4.0_and_4.1_issues.
diff --git a/Documentation/filesystems/nfs/nfs41-server.txt b/Documentation/filesystems/nfs/nfs41-server.txt
deleted file mode 100644
index 682a59fabe3f..000000000000
--- a/Documentation/filesystems/nfs/nfs41-server.txt
+++ /dev/null
@@ -1,173 +0,0 @@
-NFSv4.1 Server Implementation
-
-Server support for minorversion 1 can be controlled using the
-/proc/fs/nfsd/versions control file. The string output returned
-by reading this file will contain either "+4.1" or "-4.1"
-correspondingly.
-
-Currently, server support for minorversion 1 is enabled by default.
-It can be disabled at run time by writing the string "-4.1" to
-the /proc/fs/nfsd/versions control file. Note that to write this
-control file, the nfsd service must be taken down. You can use rpc.nfsd
-for this; see rpc.nfsd(8).
-
-(Warning: older servers will interpret "+4.1" and "-4.1" as "+4" and
-"-4", respectively. Therefore, code meant to work on both new and old
-kernels must turn 4.1 on or off *before* turning support for version 4
-on or off; rpc.nfsd does this correctly.)
-
-The NFSv4 minorversion 1 (NFSv4.1) implementation in nfsd is based
-on RFC 5661.
-
-From the many new features in NFSv4.1 the current implementation
-focuses on the mandatory-to-implement NFSv4.1 Sessions, providing
-"exactly once" semantics and better control and throttling of the
-resources allocated for each client.
-
-The table below, taken from the NFSv4.1 document, lists
-the operations that are mandatory to implement (REQ), optional
-(OPT), and NFSv4.0 operations that are required not to implement (MNI)
-in minor version 1. The first column indicates the operations that
-are not supported yet by the linux server implementation.
-
-The OPTIONAL features identified and their abbreviations are as follows:
- pNFS Parallel NFS
- FDELG File Delegations
- DDELG Directory Delegations
-
-The following abbreviations indicate the linux server implementation status.
- I Implemented NFSv4.1 operations.
- NS Not Supported.
- NS* Unimplemented optional feature.
-
-Operations
-
- +----------------------+------------+--------------+----------------+
- | Operation | REQ, REC, | Feature | Definition |
- | | OPT, or | (REQ, REC, | |
- | | MNI | or OPT) | |
- +----------------------+------------+--------------+----------------+
- | ACCESS | REQ | | Section 18.1 |
-I | BACKCHANNEL_CTL | REQ | | Section 18.33 |
-I | BIND_CONN_TO_SESSION | REQ | | Section 18.34 |
- | CLOSE | REQ | | Section 18.2 |
- | COMMIT | REQ | | Section 18.3 |
- | CREATE | REQ | | Section 18.4 |
-I | CREATE_SESSION | REQ | | Section 18.36 |
-NS*| DELEGPURGE | OPT | FDELG (REQ) | Section 18.5 |
- | DELEGRETURN | OPT | FDELG, | Section 18.6 |
- | | | DDELG, pNFS | |
- | | | (REQ) | |
-I | DESTROY_CLIENTID | REQ | | Section 18.50 |
-I | DESTROY_SESSION | REQ | | Section 18.37 |
-I | EXCHANGE_ID | REQ | | Section 18.35 |
-I | FREE_STATEID | REQ | | Section 18.38 |
- | GETATTR | REQ | | Section 18.7 |
-I | GETDEVICEINFO | OPT | pNFS (REQ) | Section 18.40 |
-NS*| GETDEVICELIST | OPT | pNFS (OPT) | Section 18.41 |
- | GETFH | REQ | | Section 18.8 |
-NS*| GET_DIR_DELEGATION | OPT | DDELG (REQ) | Section 18.39 |
-I | LAYOUTCOMMIT | OPT | pNFS (REQ) | Section 18.42 |
-I | LAYOUTGET | OPT | pNFS (REQ) | Section 18.43 |
-I | LAYOUTRETURN | OPT | pNFS (REQ) | Section 18.44 |
- | LINK | OPT | | Section 18.9 |
- | LOCK | REQ | | Section 18.10 |
- | LOCKT | REQ | | Section 18.11 |
- | LOCKU | REQ | | Section 18.12 |
- | LOOKUP | REQ | | Section 18.13 |
- | LOOKUPP | REQ | | Section 18.14 |
- | NVERIFY | REQ | | Section 18.15 |
- | OPEN | REQ | | Section 18.16 |
-NS*| OPENATTR | OPT | | Section 18.17 |
- | OPEN_CONFIRM | MNI | | N/A |
- | OPEN_DOWNGRADE | REQ | | Section 18.18 |
- | PUTFH | REQ | | Section 18.19 |
- | PUTPUBFH | REQ | | Section 18.20 |
- | PUTROOTFH | REQ | | Section 18.21 |
- | READ | REQ | | Section 18.22 |
- | READDIR | REQ | | Section 18.23 |
- | READLINK | OPT | | Section 18.24 |
- | RECLAIM_COMPLETE | REQ | | Section 18.51 |
- | RELEASE_LOCKOWNER | MNI | | N/A |
- | REMOVE | REQ | | Section 18.25 |
- | RENAME | REQ | | Section 18.26 |
- | RENEW | MNI | | N/A |
- | RESTOREFH | REQ | | Section 18.27 |
- | SAVEFH | REQ | | Section 18.28 |
- | SECINFO | REQ | | Section 18.29 |
-I | SECINFO_NO_NAME | REC | pNFS files | Section 18.45, |
- | | | layout (REQ) | Section 13.12 |
-I | SEQUENCE | REQ | | Section 18.46 |
- | SETATTR | REQ | | Section 18.30 |
- | SETCLIENTID | MNI | | N/A |
- | SETCLIENTID_CONFIRM | MNI | | N/A |
-NS | SET_SSV | REQ | | Section 18.47 |
-I | TEST_STATEID | REQ | | Section 18.48 |
- | VERIFY | REQ | | Section 18.31 |
-NS*| WANT_DELEGATION | OPT | FDELG (OPT) | Section 18.49 |
- | WRITE | REQ | | Section 18.32 |
-
-Callback Operations
-
- +-------------------------+-----------+-------------+---------------+
- | Operation | REQ, REC, | Feature | Definition |
- | | OPT, or | (REQ, REC, | |
- | | MNI | or OPT) | |
- +-------------------------+-----------+-------------+---------------+
- | CB_GETATTR | OPT | FDELG (REQ) | Section 20.1 |
-I | CB_LAYOUTRECALL | OPT | pNFS (REQ) | Section 20.3 |
-NS*| CB_NOTIFY | OPT | DDELG (REQ) | Section 20.4 |
-NS*| CB_NOTIFY_DEVICEID | OPT | pNFS (OPT) | Section 20.12 |
-NS*| CB_NOTIFY_LOCK | OPT | | Section 20.11 |
-NS*| CB_PUSH_DELEG | OPT | FDELG (OPT) | Section 20.5 |
- | CB_RECALL | OPT | FDELG, | Section 20.2 |
- | | | DDELG, pNFS | |
- | | | (REQ) | |
-NS*| CB_RECALL_ANY | OPT | FDELG, | Section 20.6 |
- | | | DDELG, pNFS | |
- | | | (REQ) | |
-NS | CB_RECALL_SLOT | REQ | | Section 20.8 |
-NS*| CB_RECALLABLE_OBJ_AVAIL | OPT | DDELG, pNFS | Section 20.7 |
- | | | (REQ) | |
-I | CB_SEQUENCE | OPT | FDELG, | Section 20.9 |
- | | | DDELG, pNFS | |
- | | | (REQ) | |
-NS*| CB_WANTS_CANCELLED | OPT | FDELG, | Section 20.10 |
- | | | DDELG, pNFS | |
- | | | (REQ) | |
- +-------------------------+-----------+-------------+---------------+
-
-Implementation notes:
-
-SSV:
-* The spec claims this is mandatory, but we don't actually know of any
- implementations, so we're ignoring it for now. The server returns
- NFS4ERR_ENCR_ALG_UNSUPP on EXCHANGE_ID, which should be future-proof.
-
-GSS on the backchannel:
-* Again, theoretically required but not widely implemented (in
- particular, the current Linux client doesn't request it). We return
- NFS4ERR_ENCR_ALG_UNSUPP on CREATE_SESSION.
-
-DELEGPURGE:
-* mandatory only for servers that support CLAIM_DELEGATE_PREV and/or
- CLAIM_DELEG_PREV_FH (which allows clients to keep delegations that
- persist across client reboots). Thus we need not implement this for
- now.
-
-EXCHANGE_ID:
-* implementation ids are ignored
-
-CREATE_SESSION:
-* backchannel attributes are ignored
-
-SEQUENCE:
-* no support for dynamic slot table renegotiation (optional)
-
-Nonstandard compound limitations:
-* No support for a sessions fore channel RPC compound that requires both a
- ca_maxrequestsize request and a ca_maxresponsesize reply, so we may
- fail to live up to the promise we made in CREATE_SESSION fore channel
- negotiation.
-
-See also http://wiki.linux-nfs.org/wiki/index.php/Server_4.0_and_4.1_issues.
--
2.24.1
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