On Tue, 2022-11-15 at 04:09 -0800, Markus Held wrote:
> Hello,
> 
> I try to use yocto SSTATE_MIRROR with a custom distribution (RDK:
> https://developer.rdkcentral.com/) and enabled yocto multilib
> support. 
> The sstate directory is created by my build server and published with
> nginx to the developer machines.
>  
> Environment:
> Bitbake 1.46.0 / Yocto Dunfell 3.1
> TUNE_PKGARCH = “cortexa53t2hf-neon-fp-armv8”
> MULTILIBS = "multilib:lib32"
> TARGET_VENDOR="-rdk"
> TARGET_OS="linux"
>  
> When a developer configures the sstate mirror in his local.conf:
> 
>    SSTATE_MIRRORS ?= " file://.* http://<build server>/sstate-
> cache/PATH;downloadfilename=PATH "
> 
> the build gets stuck on various _setscene tasks and does not
> continue. I did some debugging and the issue is related the with file
> name length of the sstate files. When the developer machine tries to
> download a file from the mirror, bitbake fetch wants to create a
> local lock file with name "<file name>.lock". Example of a sstate
> lock file that fails for me:
> 
>    sstate:lib32-dibbler:cortexa53t2hf-neon-fp-armv8-rdkmllib32-linux-
> gnueabi:1.0.1+1.0.2RC1+gitc4b0ed52e751da7823dd9a36e91f93a6310e5525:r0
> :cortexa53t2hf-neon-fp-
> armv8:3:169be56e277b6922d1cca3f23f6d56033812941a438f09a477cd96999d7d0
> 801_package_qa.tgz.siginfo.lock
> 
> This lock file cannot be created on a ext file system due the file
> name length > 255. This causes the _setscene task to get stuck
> indefinitely. It seems like most Linux file systems only support file
> names up to 255 bytes.
> 
> Is there a way to configure or limit the file name length of the
> sstate cache files? Or a way to avoid the issue with the .lock file? 
> 

There were changes in bitbake:

https://git.yoctoproject.org/poky/commit/bitbake/lib/bb/utils.py?id=273b124bf6acd77b074fde2421be331721a68c11
https://git.yoctoproject.org/poky/commit/bitbake/lib/bb/utils.py?id=09e826cfb021731c1b139046665d2d9fa24baa88

There were also sstate class changes:

https://git.yoctoproject.org/poky/commit/meta/classes/sstate.bbclass?id=b8025e972081b70960ffcbcbe43a7118041556a1
https://git.yoctoproject.org/poky/commit/meta/classes/sstate.bbclass?id=ed4bdd0f9149ba24fac375fd3af8bb2a06423105
https://git.yoctoproject.org/poky/commit/meta/classes/sstate.bbclass?id=4c6efbf03530b6f60cde59cdef61aa14538753a3

Cheers,

Richard


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