3d872e86f8
* Add POSIX byte-range lock table for FUSE mount Implement PosixLockTable with per-inode range lock tracking supporting: - Shared (F_RDLCK) and exclusive (F_WRLCK) byte-range locks - Conflict detection across different lock owners - Lock coalescing for adjacent/overlapping same-owner same-type locks - Lock splitting on partial-range unlock - Blocking waiter support for SetLkw with cancellation - Owner-based cleanup for Release * Wire POSIX lock handlers into FUSE mount Implement GetLk, SetLk, SetLkw on WFS delegating to PosixLockTable. Add posixLocks field to WFS and initialize in constructor. Clean up locks on Release via ReleaseOwner using ReleaseIn.LockOwner. Remove ENOSYS stubs from weedfs_unsupported.go. * Enable POSIX and flock lock capabilities in FUSE mount Set EnableLocks: true in mount options to advertise CAP_POSIX_LOCKS and CAP_FLOCK_LOCKS during FUSE INIT. * Avoid thundering herd in lock waiter wake-up Replace broadcast-all wakeWaiters with selective wakeEligibleWaiters that checks each waiter's requested lock against remaining held locks. Only waiters whose request no longer conflicts are woken; others stay queued. Store the requested lockRange in each lockWaiter to enable this. * Fix uint64 overflow in adjacency check for lock coalescing Guard h.End+1 and lk.End+1 with < ^uint64(0) checks so that End == math.MaxUint64 (EOF) does not wrap to 0 and falsely merge non-adjacent locks. * Add test for non-adjacent ranges with gap not being coalesced
31 lines
942 B
Go
31 lines
942 B
Go
package mount
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import "github.com/seaweedfs/go-fuse/v2/fuse"
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// https://github.com/libfuse/libfuse/blob/48ae2e72b39b6a31cb2194f6f11786b7ca06aac6/include/fuse.h#L778
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/**
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* Allocates space for an open file
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*
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* This function ensures that required space is allocated for specified
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* file. If this function returns success then any subsequent write
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* request to specified range is guaranteed not to fail because of lack
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* of space on the file system media.
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*/
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func (wfs *WFS) Fallocate(cancel <-chan struct{}, in *fuse.FallocateIn) (code fuse.Status) {
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return fuse.ENOSYS
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}
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/**
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* Check file access permissions
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*
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* This will be called for the access() system call. If the
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* 'default_permissions' mount option is given, this method is not
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* called.
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*
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* This method is not called under Linux kernel versions 2.4.x
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*/
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func (wfs *WFS) Access(cancel <-chan struct{}, input *fuse.AccessIn) (code fuse.Status) {
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return fuse.ENOSYS
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}
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