table of contents
| LOCK_MAY_READ(9) | The Linux VFS | LOCK_MAY_READ(9) |
NAME¶
lock_may_read - checks that the region is free of locks
SYNOPSIS¶
int lock_may_read(struct inode * inode, loff_t start, unsigned long len);
ARGUMENTS¶
inode
the inode that is being read
start
the first byte to read
len
the number of bytes to read
DESCRIPTION¶
Emulates Windows locking requirements. Whole-file mandatory locks (share modes) can prohibit a read and byte-range POSIX locks can prohibit a read if they overlap.
N.B. this function is only ever called from knfsd and ownership of locks is never checked.
COPYRIGHT¶
| June 2024 | Kernel Hackers Manual 3.10 |