https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278135
Bug ID: 278135
Summary: fusefs: pathconf(_PC_MIN_HOLE_SIZE) fails on new
mountpoint with unopened file
Product: Base System
Version: 15.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
When a program calls pathconf(path, _PC_MIN_HOLE_SIZE) on a fusefs file system,
if the kernel doesn't already know whether the file system supports FUSE_LSEEK,
it must issue a FUSE_LSEEK operation to find out. It sends that operation to
the provided path. BUT, the current implementation neglects to ensure that a
fuse file handle is open. That's a bug. We never noticed it before because
the test suite only uses fpathconf, not pathconf.
Steps to Reproduce
==================
1) Mount a file system that is known to support FUSE_LSEEK
2) Without doing any open(), stat(), access(), or similar, try
pathconf("/mountpoint/hello.txt", _PC_MIN_HOLE_SIZE)
3) It ought to return 1, but it will instead fail with EINVAL
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