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coreos / go-tcmu

Go SCSI emulation via the Linux TCM in Userspace module
Apache License 2.0
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When some program on the same host enabled netlink support for target_core_user.ko, go-tcmu program hangs #15

Open nak3 opened 6 years ago

nak3 commented 6 years ago

description

When some program that uses target_core_user.ko enables netlink support (TCMU_ATTR_SUPP_KERN_CMD_REPLY), go-tcmu hangs.

reproduce steps

  1. Run tcmu-runner (to enable netlink reply support).
  # ./tcmu-runner
  // You can stop tcmu-runner process as it keeps the netlink support enabled //
  1. Start go-tcmu program
  # go run cmd/tcmufile/tcmufile.go /tmp/foo
  ... snip ...
  DEBU[0000] Setting /sys/kernel/config/target/core/user_30/foo/control: dev_config=go-tcmu//foo
  DEBU[0000] Setting /sys/kernel/config/target/core/user_30/foo/control: hw_block_size=1024
  DEBU[0000] Setting /sys/kernel/config/target/core/user_30/foo/control: async=1
  DEBU[0000] Setting /sys/kernel/config/target/core/user_30/foo/enable: 1
  //  hang forever //