{"id":105081,"date":"2022-09-13T09:36:41","date_gmt":"2022-09-13T07:36:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/wd-razrabatyvaet-nvme-drajver-na-yazyke-rust-eksperimenty-s-rust-vo-freebsd"},"modified":"2022-09-13T09:36:41","modified_gmt":"2022-09-13T07:36:42","slug":"wd-razrabatyvaet-nvme-drajver-na-yazyke-rust-eksperimenty-s-rust-vo-freebsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/wd-razrabatyvaet-nvme-drajver-na-yazyke-rust-eksperimenty-s-rust-vo-freebsd","title":{"rendered":"A WD est\u00e1 desenvolvendo um driver NVMe na linguagem Rust. Experimentos com Rust no FreeBSD.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Na confer\u00eancia Linux Plumbers 2022, que est\u00e1 ocorrendo atualmente, um engenheiro da empresa Western Digital apresentou uma palestra sobre o desenvolvimento de um driver experimental para SSDs com interface NVM-Express (NVMe), escrito em Rust e funcionando no n\u00edvel do n\u00facleo Linux. Embora o projeto ainda esteja em est\u00e1gio inicial de desenvolvimento, os testes realizados mostraram que o desempenho do driver NVMe em Rust \u00e9 equivalente ao do driver NVMe existente no n\u00facleo, escrito em C.

\"A<\/center>
\"A<\/center> <\/p>\n

Na palestra, foi mencionado que o driver NVMe atual escrito em C atende completamente \u00e0s necessidades dos desenvolvedores, mas a subsistema NVMe \u00e9 uma boa plataforma para explorar a viabilidade do desenvolvimento de drivers em Rust, pois \u00e9 suficientemente simples, amplamente utilizada, exige alto desempenho, tem uma implementa\u00e7\u00e3o de refer\u00eancia comprovada para compara\u00e7\u00e3o e suporta v\u00e1rias interfaces (dev, pci, dma, blk-mq, gendisk, sysfs). <\/p>\n

\u00c9 observado que o driver PCI NVMe em Rust j\u00e1 oferece a funcionalidade necess\u00e1ria para opera\u00e7\u00e3o, mas ainda n\u00e3o est\u00e1 pronto para uso geral, pois requer melhorias espec\u00edficas. Entre os planos futuros, destaca-se a remo\u00e7\u00e3o de blocos unsafe do c\u00f3digo, suporte para opera\u00e7\u00f5es de remo\u00e7\u00e3o de dispositivo e descarregamento do driver, suporte para a interface sysfs, implementa\u00e7\u00e3o de inicializa\u00e7\u00e3o adiada, cria\u00e7\u00e3o de um driver para blk-mq e experimentos com a utiliza\u00e7\u00e3o de modelo de programa\u00e7\u00e3o ass\u00edncrona para queue_rq.

\r\n \"Por\r\n
<\/div>\r\n <\/div> <\/center> <\/p>\n

Adicionalmente, podem ser destacados os experimentos conduzidos pela NCC Group no desenvolvimento de drivers em Rust para o n\u00facleo FreeBSD. Como exemplo, \u00e9 detalhado um simples echo-driver que retorna os dados gravados no arquivo \/dev\/rustmodule. Na pr\u00f3xima fase dos experimentos, a NCC Group est\u00e1 considerando a possibilidade de reescrever em Rust componentes b\u00e1sicos do n\u00facleo para aumentar a seguran\u00e7a das opera\u00e7\u00f5es de rede e de arquivos. <\/p>\n

No entanto, embora tenha sido demonstrada a possibilidade de cria\u00e7\u00e3o de m\u00f3dulos simples na linguagem Rust, uma integra\u00e7\u00e3o mais profunda do Rust no n\u00facleo do FreeBSD exigir\u00e1 trabalho adicional. Por exemplo, menciona-se a necessidade de criar um conjunto de camadas de abstra\u00e7\u00e3o sobre subsistemas e estruturas do n\u00facleo, semelhantes \u00e0s extens\u00f5es preparadas pelo projeto Rust for Linux. No futuro, planeja-se realizar experimentos semelhantes com o n\u00facleo do Illumos e identificar abstra\u00e7\u00f5es comuns em Rust que poderiam ser usadas em drivers escritos em Rust para Linux, BSD e Illumos. <\/p>\n

De acordo com as empresas Microsoft e Google, cerca de 70% das vulnerabilidades em seus produtos de software s\u00e3o causadas por manipula\u00e7\u00f5es de mem\u00f3ria inseguras. Acredita-se que o uso da linguagem Rust permitir\u00e1 reduzir o risco de surgimento de vulnerabilidades causadas por manipula\u00e7\u00f5es inseguras de mem\u00f3ria e eliminar erros, como acessar \u00e1reas de mem\u00f3ria ap\u00f3s sua libera\u00e7\u00e3o e estouro de buffer. <\/p>\n

A seguran\u00e7a no manuseio da mem\u00f3ria \u00e9 garantida no Rust durante a compila\u00e7\u00e3o atrav\u00e9s da verifica\u00e7\u00e3o de refer\u00eancias, rastreamento da propriedade dos objetos e considera\u00e7\u00e3o do tempo de vida dos objetos (escopo), bem como pela avalia\u00e7\u00e3o da corre\u00e7\u00e3o do acesso \u00e0 mem\u00f3ria durante a execu\u00e7\u00e3o do c\u00f3digo. O Rust tamb\u00e9m oferece ferramentas para prote\u00e7\u00e3o contra estouros inteiros, exige a inicializa\u00e7\u00e3o obrigat\u00f3ria dos valores das vari\u00e1veis antes do uso, lida melhor com erros na biblioteca padr\u00e3o, aplica o conceito de imutabilidade (immutable) para refer\u00eancias e vari\u00e1veis por padr\u00e3o e oferece forte tipagem est\u00e1tica para minimizar erros l\u00f3gicos.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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