Add max bytes limit and default chunk size#262
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steven-mpawulo wants to merge 2 commits intotursodatabase:mainfrom
Open
Add max bytes limit and default chunk size#262steven-mpawulo wants to merge 2 commits intotursodatabase:mainfrom
steven-mpawulo wants to merge 2 commits intotursodatabase:mainfrom
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rail44
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Apr 16, 2026
Git creates loose objects with open(O_RDWR|O_CREAT|O_EXCL, 0444), writes compressed data, then closes the fd. On local filesystems this works because the open fd retains write access regardless of mode bits. On NFS v3, which is stateless, the server checks the file's current mode on each WRITE RPC and rejects it for 0444 files with NFS3ERR_ACCES. This is a known issue affecting NFS/FUSE servers: - nfs-ganesha: tursodatabase#262, #349 (fixed in 2.7.3-9) - mergerfs: #626, #343 (fixed via nfsopenhack) - Red Hat: Bug 1751210 Fix: In nfsproc3_write(), allow the file owner and root to bypass the mode-bit write check. In POSIX, the owner can always chmod to restore write permission, so the restriction is not enforceable against the owner. Non-owner, non-root users remain subject to mode-bit checks. Add a syscall test (test-write-readonly-new) that reproduces git's open(O_CREAT, 0444) → write → close pattern.
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Enforce max_bytes quota on writes, throwing ENOSPC if exceeded.
Persist the default chunk_size in fs_config.
Update statfs() to report correct usage.