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Here's the current version, with= semantic newlines: In Linux kernels up to 5.4, flock() is not propagated over SMB. A file with such locks will not appear locked for remote clients. =20 Since Linux 5.5, flock() locks are emulated with SMB byte-range locks on t= he entire file. Similarly to NFS, this means that fcntl(2) and flock() locks interact with= one another. Another important side-effect is that the locks are not advisory anymore: a write on a locked file will always fail with EACCES. This difference originates from the design of locks in the SMB protocol, w= hich provides mandatory locking semantics. =20 Remote and mandatory locking semantics may vary with SMB protocol, mount o= ptions and server type. See mount.cifs(8) for additional information. Cheers, --=20 Aur=C3=A9lien Aptel / SUSE Labs Samba Team GPG: 1839 CB5F 9F5B FB9B AA97 8C99 03C8 A49B 521B D5D3 SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 N=C3=BCrnberg, D= E GF: Felix Imend=C3=B6rffer, Mary Higgins, Sri Rasiah HRB 247165 (AG M=C3=BC= nchen)