From 4253a94b9bcb03c3c59e37a05ac006e79dfdc8bf Mon Sep 17 00:00:00 2001 From: Paul Buetow Date: Sat, 21 Feb 2026 19:39:11 +0200 Subject: Implement truncate_test.go + workload scenarios for truncate, ftruncate - truncate-basic: tests SYS_TRUNCATE (path-based) via syscall.Truncate - truncate-ftruncate: tests SYS_FTRUNCATE (fd-based) via syscall.Ftruncate - Both syscall wrappers use direct SYS_* calls on amd64 (no *at wrapping) Task #343 Amp-Thread-ID: https://ampcode.com/threads/T-019c8145-7437-7218-95ff-4cb451e18655 Co-authored-by: Amp --- integrationtests/cmd/ioworkload/scenarios.go | 32 +++++++++++++++++++++++++--- 1 file changed, 29 insertions(+), 3 deletions(-) (limited to 'integrationtests/cmd/ioworkload') diff --git a/integrationtests/cmd/ioworkload/scenarios.go b/integrationtests/cmd/ioworkload/scenarios.go index e87d53e..c4583e9 100644 --- a/integrationtests/cmd/ioworkload/scenarios.go +++ b/integrationtests/cmd/ioworkload/scenarios.go @@ -52,7 +52,8 @@ var scenarios = map[string]func() error{ "sync-fdatasync": syncFdatasync, "sync-sync": syncSync, "sync-sync-file-range": syncSyncFileRange, - "truncate-basic": truncateBasic, + "truncate-basic": truncateBasic, + "truncate-ftruncate": truncateFtruncate, } func makeTempDir(prefix string) (string, func(), error) { @@ -1338,7 +1339,8 @@ func syncSyncFileRange() error { return syscall.SyncFileRange(fd, 0, int64(len(data)), 0) } -// truncateBasic opens a file, writes data, and truncates it. +// truncateBasic opens a file, writes data, then truncates it via +// syscall.Truncate which uses SYS_TRUNCATE directly on amd64 (path-based). func truncateBasic() error { dir, cleanup, err := makeTempDir("truncate-basic") if err != nil { @@ -1351,9 +1353,33 @@ func truncateBasic() error { if err != nil { return fmt.Errorf("open: %w", err) } - defer syscall.Close(fd) if _, err := syscall.Write(fd, []byte("truncate this content")); err != nil { + syscall.Close(fd) + return fmt.Errorf("write: %w", err) + } + syscall.Close(fd) + + return syscall.Truncate(path, 5) +} + +// truncateFtruncate opens a file, writes data, then truncates it via +// syscall.Ftruncate which uses SYS_FTRUNCATE directly on amd64 (fd-based). +func truncateFtruncate() error { + dir, cleanup, err := makeTempDir("truncate-ftruncate") + if err != nil { + return err + } + defer cleanup() + + path := filepath.Join(dir, "ftruncfile.txt") + fd, err := syscall.Open(path, syscall.O_RDWR|syscall.O_CREAT, 0o644) + if err != nil { + return fmt.Errorf("open: %w", err) + } + defer syscall.Close(fd) + + if _, err := syscall.Write(fd, []byte("ftruncate this content")); err != nil { return fmt.Errorf("write: %w", err) } return syscall.Ftruncate(fd, 5) -- cgit v1.2.3