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20130517 Bug が直るまで ~メーカサイド~
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Ryuichi Takashima
May 18, 2022
Technology
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20130517 Bug が直るまで ~メーカサイド~
2013/05/17 @電力系NCC情報交換会
通信機器メーカでスイッチ、ルータ等のファームウェアのバグがどう修正されるかについて解説した資料
Ryuichi Takashima
May 18, 2022
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Transcript
Bug ͕Δ·Ͱ ʙϝʔΧαΠυʙ 20135݄17 ϛυΫϥδϟύϯגࣜձࣾ ߴౢོҰ ^55393_21948_18149_2516_4716$
Copyright ©2013 Midokura All rights reserved ຊͷΞδΣϯμ u ຊͷత u #VHमਖ਼ͷྲྀΕ
u ݱͷ4&ͷۤ
ຊͷత
Copyright ©2013 Midokura All rights reserved ຊͷత ͜ͷؒਃࠂͨ͠ Bug ·ͩͬͯͳ͍
Μ͚ͩͲ? ԿͰ!? ίίΛߟ͑ͯΈΔ ਃ͠༁͍͟͝·ͤΜɺຊ݅ʹؔ͠·ͯ͠ n 1ޙͷϝδϟʔόʔδϣϯΞοϓͰमਖ਼ ͢ΔࣄʹͳΓ·ͨ͠ n ϋʔυΣΞ্ͷ੍ݶͱ͍͏ࣄʹͳΓɺ ಛʹमਖ਼ΛߦΘͳ͍ࣄʹͳΓ·ͨ͠ n ͓٬༷Ҏ֎Ͱͷࣄྫ͕ͳ͘ɺ࠶ݱෆՄ ೳͷҝෆ۩߹ͱೝΊΒΕ·ͤΜͰͨ͠
Bugमਖ਼ͷྲྀΕ
Copyright ©2013 Midokura All rights reserved োਃࠂ૭ޱ࿈བྷ Ͳ͏ͬͯτϥϒϧਃࠂΛ͍ͯ͠Δ͔? Case
1 ୲ӦۀɺSEʹ࿈བྷ Case 2
Copyright ©2013 Midokura All rights reserved ʲલఏࣝʳΑ͋͘ΔϝʔΧͷ৫ߏ Sales TAC
Product Engineering l Development (৽نՃ։ൃ) l Sustaining (طଘमਖ਼) l Quality Assurance (࣭ཧ) l Technical Assistance (ड) l Product Manager (༷) l Sales Representative (Ӧۀ) l Systems Engineer (SE) ෦ ػೳ ٬ઌSE Ӧۀ෦ डͱ ͢෦ผ ϙΠϯτ ༷ܾఆͱ ։ൃɾमਖ਼ ෦ผ
Copyright ©2013 Midokura All rights reserved Case1.োਃࠂ૭ޱ࿈བྷ࣌ͷׂ TAC Eng.
Product End user ΤεΧϨʔγϣϯͷྲྀΕ ༏ઌܾఆ ׂ ∐ طௐࠪ ࠶ݱࢼݧ ৄࡉௐࠪ मਖ਼ ਃࠂ ༷Өڹݕ౼ ༷मਖ਼
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ༏ઌͷೝ͕ࣝ߹Θͳ͍
োͳΜ͔ͩΒ࠷༏ઌͰͯ͠! ௨ৗɺϝʔΧαΠυͰ ʮશஅܧଓத > ؒܽతஅܧଓ> ͦͷଞෆ۩߹ʯ ఔͷ༏ઌͷஈ֊͚ ຆͲͷέʔεʮͦͷଞෆ۩߹ʯʹ૬
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ༏ઌͷೝ͕ࣝ߹Θͳ͍
Photo Credit: sambrown92 via Compfight cc ӦۀΤεΧϨʔγϣϯ ղ ΦϓγϣϯαʔϏεͷߪೖ Photo Credit: Steve Wilson via Compfight cc
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ मਖ਼λΠϛϯά͕͋Θͳ͍
ԿͰ࣍ͷ࣍ͷύονͰमਖ਼ͳͷ!? ࣍Ͱͯ͠Α! ϦϦʔε࣌ͷ QA (࣭อূ) ࢼݧɺ࠷͔ΒҰिؒఔ ͔͔Γɺෆ۩߹͕ͰΔͱमਖ਼ޙ࠷ॳ͔ΒΓ͠ ߲͕ՃʹͳΔͱࢼݧ߲ͷՃඞཁʹ ϦϦʔεִؒʹΑΔ͕ɺ௨ৗҰϲ݄࠷ඞཁ
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ मਖ਼ͷӨڹ͕େ͖͍
ϝδϟʔόʔδϣϯΞοϓΛͯͬͯ Ͳ͏͍͏͜ͱ? l OSͷػೳશମमਖ਼͕ٴ͢Δ༷ͳमਖ਼ l FPGAͷίʔυ͕ඞཁʹͳΔ༷ͳमਖ਼ ʹ͍ͭͯɺσάϨͷةݥ͕େ͖͍ҝɺ ϝδϟʔϦϦʔεαΠΫϧΛ͔ͭ͠ͳ͍έʔε…
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ मਖ਼λΠϛϯά͕͋Θͳ͍
Photo Credit: ryoichi360 via Compfight cc ຊʹக໋తͳෆ۩߹ͷ߹ۓٸύονΛݕ౼ ސ٬ઐ༻ύον࡞Մೳ (ޙͷࠞཚΛট͘ͷͰඇਪ) ղ मਖ਼ͷӨڹ͕େ͖͍ ˍ
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ใ͕গͳ͍
αʔϏε͕ͱ·͍ͬͨͬͯͬͨͰ ͠ΐ? ͑ɺোղੳϩά!? ͱʹ͔͘ࢭ·ͬͨͷΑ! ࠶ݱࢼݧৄࡉղੳΛਐΊΔʹɺ l োϩά (show techͷྨ) l ࣌ܥྻͷ࡞ۀϩά l पลػثͷঢ়گ࣌ܥྻͷϩά ࠷ඞཁɻෳࡶͳোͰ͋Ε͋Δ΄Ͳɺঢ়گΛಛఆ͢ Δใ͕ඞཁͱͳΔ
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ใ͕গͳ͍
Photo Credit: Mr. Fibble via Compfight ccc োൃੜ࣌ʹαʔϏεܧଓͱͷ݉Ͷ߹͍Λߟྀ͠ͳ͕Βɺ ՄೳͳݶΓଟ͘ͷใΛอଘ͓ͯ͘͠ ղ
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ࠶ݱ͠ͳ͍
͏ͪͷػثͰো͕ىͬͨ͜͡Όͳ ͍! ղੳͰ͖ͳ͍ͬͯͲ͏͍͏͜ͱ? ো࣌ͷղੳϩάͰ͕ࣗ໌ʹ͔ΔέʔεҎ֎Ͱɺ ࠶ݱ͠ͳ͍ࣄʹ࣮ϝʔΧͰղੳͷਐΊΑ͏͕ͳ͍ ͦͷ߹ɺίʔυϨϏϡʔͷख୳ΓͷղੳͱͳΓɺ໎ٶ ೖΓͱͳΔέʔεଟ͍
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ࠶ݱ͠ͳ͍
Photo Credit: Dan Gilbert via Compfight cc োڥͷอଘ োϩάͷอଘ ղ ϦϞʔτଓͷఏڙ Photo Credit: Mr. Fibble via Compfight cc
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ͤͳ͍
ਃࠂͨ͠༰͕ͤͳ͍ͬͯͲ͏͍͏ ࣄ!? ༷͍ͯ͠ΔϋʔυΣΞͷෆ۩߹ʹΑΓमਖ਼͕ޙ͔Βग़ དྷͳ͍έʔεɺ֘ػೳΛमਖ਼͢ΔࣄͰଞͷػೳੑೳʹ ஶ͘͠ѱӨڹΛ༩͑ΔέʔεͰ ʮ੍ݶࣄ߲ (Ϧϛςʔγϣϯ)ʯ ͱ༷ͯ͠Λमਖ਼͢Δέʔε͕͋Δ
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ͤͳ͍
Photo Credit: ryoichi360 via Compfight cc ୲ӦۀɺSE Լ࠲ ղ
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ෆ۩߹Ͱͳ͘ػೳ֦ு
◦◦ରԠͬͯॻ͍ͯ͋ΔΜ͔ͩΒɺ ××͕࣮͞Ε͍ͯͳ͍ͷ͓͔͍͠Ͱ ͠ΐ!? ඪ४ͷղऍɺ࠷ॳʹͦͷػೳ֦ுΛཁٻͨ͠ސ٬ͷཁ݅ ʹΑͬͯɺ͔͋ͬͯ͠Δ͖ػೳͰෆ۩߹Ͱͳ͘ ʮػೳ֦ுཁٻʯ ͱͯ͠ѻΘΕΔ߹͕͋Δ ͦͷ߹ɺ௨ৗϝδϟʔϦϦʔεִؒΛލ͙ඞཁ͕͋Δ͠ɺ ͦͦػೳ֦ு͕औΓࠐ·ΕΔ͔Ͳ͏͔…
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ૬ੑ
ԿͰࣾͱܨ͕Βͳ͍ͷ!? ඪ४ʹղऍͷ༨͕͞Ε͍ͯͨΓ͢ΔͱɺͲͪΒਖ਼͠ ͍࣮Λ͍ͯ͠Δͷʹܨ͕Βͳ͍͜ͱ͋Δ ૬खͷ΄͏͕γΣΞ͕େ͖͍߹ʹσϑΝΫτελϯ μʔυͱͯ͠ѻΘΕɺࣗࣾଆ͕ෆ۩߹ѻ͍͞ΕΔ߹
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ෆ۩߹Ͱͳ͘ػೳ֦ு
Photo Credit: Annika1982 via Compfight cc ࣄલݕূ ղ ୲ӦۀɺSE Λ௨ͨ͡ ػೳ֦ுཁٻ Photo Credit: AndyC_pics via Compfight cc ૬ੑ ˍ
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ػೳӨڹ͕গͳ͍ෆ۩߹
؆୯ʹͤͦ͏ͳෆ۩߹ͳͷʹɺ͍ͭ ·ͰͨͬͯΒͳ͍͡Όͳ͍! ؆୯ʹͤΔͷͰɺ࣮αʔϏεʹӨڹ͕ͳ͍ͷɺ ଞͷ༏ઌͷߴ͍ͷʹԡ͞ΕͯɺτίϩςϯࣜʹઌԆ ͠ʹ͞ΕΔέʔε
Copyright ©2013 Midokura All rights reserved Case1. ͍͜͠߹ ػೳӨڹ͕গͳ͍ෆ۩߹
Photo Credit: striatic via Compfight cc ࣮αʔϏεʹӨڹ༗ͱઆಘ͢Δ͚ͩͷϩδοΫΛΈཱͯΔ ղ
Copyright ©2013 Midokura All rights reserved Case2. ୲ӦۀɺSEʹ࿈བྷ ୲ӦۀɺSE
Eng. Product End user ΤεΧϨʔγϣϯͷྲྀΕ ׂ ∐ ਃࠂ TAC Case1ͱಉ͡ ༷Өڹݕ౼ ༷मਖ਼ ༰அ ෆ۩߹ ػೳ֦ு
Copyright ©2013 Midokura All rights reserved Case2. ͍͜͠߹ େɺ͍͜͠
োडʹͯ͠ϥν͕͔͋ͳ͍ͷ Α! ௐࠪͯ͠ંΓฦ͠·͢ɻɻɻ
Copyright ©2013 Midokura All rights reserved Case2. ͍͜͠߹ ୲ӦۀɺSEͷ͓ࣄ
͓٬͞Μʹ͔ΘΓোใͷใཧΛߦ͍ɺTAC Engineering ͷΤεΧϨʔγϣϯΛߦ͏ ͓٬͞Μʹ͔ΘΓػೳ֦ுͷใཧΛߦ͍ɺProduct Manager ͷΤεΧϨʔγϣϯΛߦ͏ Կʹ͜ͷ͓٬͞Μ͕େࣄ͔ɺঢ়گ͕ϚζΠ͔Λ TACɺ Engineering, Product Manager ʹ͑ɺ༏ઌΛ্͛ͤ͞Δ ͓٬͞Μʹ͔ΘΓ࠶ݱࢼݧΛߦ͍ɺTAC Engineering ʹ ূڌΛ͖͚ͭͭΔ
ݱͷSEͷۤ
Copyright ©2013 Midokura All rights reserved ཁ͢Δʹ THE ൘ڬΈ
Copyright ©2013 Midokura All rights reserved ͦΕ͕ࣄͰ͋Γ·͕͢ ͓٬͞Μͱ͢෦ॺ͚ͩʹɺ ݟղ͕ҟͳΔͱհ
TAC ͞ͳ͍ͱ͍͚ͳ͍ϩδοΫΛ٧Ίͳ͍ͱ ͍ํ͕͓͔͍͠ɺͱ͍ΘΕͨΓ… Engineering ػೳ֦ுΛཁٻͨ͠ΒɺવചΓ্͛૿Λ ଋͤ͞ΒΕ·͢… Product ͋ͳ͔ͨΒങͬͯɺࢲ͕ࠔͬͯΔΜ͔ͩΒ Կͱ͔ͯ͠Α! ͱ͍ΘΕͨΒ͏ɻɻɻ ͓٬͞Μ େมͰ͕͢ɺ͓٬͞Μ͕͍Δ͔Β͕Μͬͯ·͢! ΪϦΪϦ
Thank you!