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Merge "Document the source of the afs 0x40084301 ioctl magic number"

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Zuul 2023-06-08 04:18:28 +00:00 committed by Gerrit Code Review
parent a43d65d87a ff166e3ea9
commit cc2db2aeb5
1 changed files with 10 additions and 0 deletions
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10
zuul/driver/bubblewrap/__init__.py
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@ -86,6 +86,16 @@ class BubblewrapExecutionContext(BaseExecutionContext):
# http://asa.scripts.mit.edu/trac/attachment/ticket/145/setpag.txt#L315
if os.path.exists("/proc/fs/openafs/afs_ioctl"):
f = os.open("/proc/fs/openafs/afs_ioctl", os.O_RDONLY)
# 0x40084301 is the result of _IOW('C', 1, void *) which originates
# from OpenAFS' VIOC_SYSCALL defined at:
# https://github.com/openafs/openafs/blob/
# 630d423897e5fffed1873aa9d12c4e74a8481041/
# src/config/afs_args.h#L258
# The 21 at the end of the struct is AFSCALL_SETPAG which
# is defined at:
# https://github.com/openafs/openafs/blob/
# 630d423897e5fffed1873aa9d12c4e74a8481041/
# src/config/afs_args.h#L97
fcntl.ioctl(f, 0x40084301, struct.pack("lllll", 0, 0, 0, 0, 21))
os.close(f)