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[bug#52555] [PATCH v4 5/7] eris: Connect with an ERIS Store over CoAP+Un
From: |
pukkamustard |
Subject: |
[bug#52555] [PATCH v4 5/7] eris: Connect with an ERIS Store over CoAP+Unix. |
Date: |
Thu, 28 Dec 2023 09:40:08 +0000 |
* guix/eris.scm (open-coap-unix-socket): New procedure.
(guix-eris-block-reducer): Handle coap+unix URIs.
* guix/publish.scm (bake-narinfo+nar): Start a fibers scheduler when encoding
item with ERIS.
---
guix/eris.scm | 63 ++++++++++++++++++++++++++++++----------
guix/scripts/publish.scm | 9 +++++-
2 files changed, 56 insertions(+), 16 deletions(-)
diff --git a/guix/eris.scm b/guix/eris.scm
index d98a9a62bd..3fbedd0cb7 100644
--- a/guix/eris.scm
+++ b/guix/eris.scm
@@ -21,8 +21,11 @@ (define-module (guix eris)
#:use-module (eris)
#:use-module (eris fs)
#:use-module (eris sqlite)
+ #:use-module (eris coap)
#:use-module (eris read-capability)
+ #:use-module (coap tcp)
+
#:use-module (web uri)
#:use-module (ice-9 match)
#:use-module (srfi srfi-171)
@@ -42,27 +45,57 @@ (define %eris-store-url
(define %guix-eris-convergence-secret
(make-parameter %null-convergence-secret))
+(define (open-coap-unix-socket path)
+ (let ((sock (socket PF_UNIX SOCK_STREAM 0)))
+ ;; Release FD on exec
+ (fcntl sock F_SETFD FD_CLOEXEC)
+ ;; Set to non-blocking
+ (fcntl sock F_SETFL (logior O_NONBLOCK (fcntl sock F_GETFL)))
+ ;; Connect
+ (connect sock AF_UNIX path)
+
+ ;; Initialize the CoAP connection
+ (open-socket-for-uri #f
+ #:socket sock
+ ;; Allow up to 64 in-flight requests
+ #:nstart 64)))
+
(define (guix-eris-block-reducer)
"Returns an ERIS block reducer."
- (if (uri? (%eris-store-url))
- (match (uri-scheme (%eris-store-url))
+ (let ((store-url (%eris-store-url)))
+ (if (uri? store-url)
+ (match (uri-scheme store-url)
+
+ ;; Store blocks in an SQLite database (see
+ ;; https://eris.codeberg.page/eer/sqlite.xml)
+ ('sqlite
+ (eris-sqlite-block-reducer (uri-path store-url)))
- ;; Store blocks in an SQLite database (see
- ;; https://eris.codeberg.page/eer/sqlite.xml)
- ('sqlite
- (eris-sqlite-block-reducer (uri-path (%eris-store-url))))
+ ;; Connect to a CoAP ERIS store over a Unix socket
+ ('coap+unix
+ ;; Wrap the eris-coap-block-reducer to close the provided
connection.
+ (let ((ecbr (eris-coap-block-reducer
+ (build-uri 'coap #:path ".well-known/eris")
+ #:nstart 64
+ #:connection (open-coap-unix-socket
+ (uri-path store-url)))))
+ (case-lambda
+ (() (ecbr))
+ ((conn ref-block) (ecbr conn ref-block))
+ ((conn)
+ (ecbr conn)
+ (close-port conn)))))
- ;; TODO
- ;; ('coap+unix #f)
- ;; ('coap+tcp #f)
+ ;; TODO
+ ;; ('coap+tcp #f)
- (_ (error "Don't know how to handle ERIS store URL "
- (uri->string (%eris-store-url)))))
+ (_ (error "Don't know how to handle ERIS store URL "
+ (uri->string (%eris-store-url)))))
- ;; If no ERIS store URL is provided we just compute the ERIS URN without
- ;; storing the blocks anywhere. As dummy block-reducer we use `rcount`
from
- ;; SRFI-171 that counts the number of blocks.
- rcount))
+ ;; If no ERIS store URL is provided we just compute the ERIS URN
without
+ ;; storing the blocks anywhere. As dummy block-reducer we use `rcount`
from
+ ;; SRFI-171 that counts the number of blocks.
+ rcount)))
(define* (eris-encode-store-item item)
"Encodes the store item ITEM using ERIS and returns the read capability as
diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm
index 2e7138f3c7..0b61354327 100644
--- a/guix/scripts/publish.scm
+++ b/guix/scripts/publish.scm
@@ -54,6 +54,7 @@ (define-module (guix scripts publish)
#:use-module (guix store)
#:use-module ((guix serialization) #:select (write-file))
#:use-module (guix eris)
+ #:use-module (fibers)
#:use-module (zlib)
#:autoload (lzlib) (call-with-lzip-output-port
make-lzip-output-port)
@@ -655,7 +656,13 @@ (define* (bake-narinfo+nar cache item
(let ((compression (actual-compressions item compressions))
(eris-urn (if eris?
- (eris-encode-store-item item)
+ ;; Encode with fibers.
+ ;; XXX: There seems to be some buggy interactions when
+ ;; running a fibers scheduler and connecting to the
+ ;; store.
+ (run-fibers (lambda ()
+ (eris-encode-store-item item))
+ #:drain? #t)
#f)))
(for-each (cut compress-nar cache item <>) compressions)
--
2.41.0
- [bug#52555] [PATCH v4 0/7] Decentralized substitute distribution with ERIS, pukkamustard, 2023/12/28
- [bug#52555] [PATCH v4 2/7] gnu: Add guile-coap., pukkamustard, 2023/12/28
- [bug#52555] [PATCH v4 3/7] gnu: guile-eris: Update to 1.2.0-dev., pukkamustard, 2023/12/28
- [bug#52555] [PATCH v4 1/7] narinfo: Add ERIS field., pukkamustard, 2023/12/28
- [bug#52555] [PATCH v4 4/7] publish: Add ERIS URN to narinfo., pukkamustard, 2023/12/28
- [bug#52555] [PATCH v4 5/7] eris: Connect with an ERIS Store over CoAP+Unix.,
pukkamustard <=
- [bug#52555] [PATCH v4 7/7] gnu: Add kapla., pukkamustard, 2023/12/28
- [bug#52555] [PATCH v4 6/7] substitute: Decode substitutes using ERIS., pukkamustard, 2023/12/28