---
title: fl
framework: Kernel
role: pseudoSymbol
path: kernel/vnop_allocate_args/1807089-fl
---

# fl

Description of file region to lock. l_whence is as with "lseek." Includes a type: F_RDLCK (shared lock), F_UNLCK (unlock) , and F_WRLCK (exclusive lock).

## See Also

### Fields

- [vp](kernel/vnop_allocate_args/1807080-vp.md)
- [id](kernel/vnop_allocate_args/1807083-id.md)
- [op](kernel/vnop_allocate_args/1807086-op.md)
- [flags](kernel/vnop_allocate_args/1807092-flags.md)
- [ctx](kernel/vnop_allocate_args/1807096-ctx.md)
- [timeout](kernel/vnop_allocate_args/1807102-timeout.md)