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[2.7.225.93]) by smtp.gmail.com with ESMTPSA id l13-20020a5d6d8d000000b0020d0c37b350sm3226314wrs.27.2022.05.27.14.40.53 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 27 May 2022 14:40:53 -0700 (PDT) Message-ID: <1095d74e-f90f-049f-2cff-ee284c197a4a@gmail.com> Date: Fri, 27 May 2022 23:40:45 +0200 List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: fcntl F_KINFO for Content-Language: en-US To: freebsd-hackers@freebsd.org References: <5e7863b6-4c57-16a2-0b54-655defefb347@gmail.com> From: Paul Floyd In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4L8ysg38ljz3hPT X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20210112 header.b=qoa1ds1B; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of paulf2718@gmail.com designates 2a00:1450:4864:20::433 as permitted sender) smtp.mailfrom=paulf2718@gmail.com X-Spamd-Result: default: False [-3.40 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; TO_DN_NONE(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-0.40)[-0.401]; RECEIVED_SPAMHAUS_PBL(0.00)[2.7.225.93:received]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20210112]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::433:from]; MLMMJ_DEST(0.00)[freebsd-hackers]; RCVD_TLS_ALL(0.00)[] X-ThisMailContainsUnwantedMimeParts: N Hi Konstantin > When open(2) creates a new file, the vnode name is not entered into > the name cache. I believe this is done to smoother the case like > untarring large set of files, which would replace existing cached > entries with probably not too useful new entries. > > F_KINFO uses name cache to reconstruct the last element of the path, > on most real file systems like UFS. If this last element is not cached, > F_KINFO is unable to return the path. OK, thanks. I'll keep the old KERN_PROC_FILEDESC code then, which seems to work better (though I do have one issue since FrereBSD 13 in code that does a fork()). A+ Paul