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| POSIX_LOCK_FILE(9) | The Linux VFS | POSIX_LOCK_FILE(9) |
NAME¶
posix_lock_file - Apply a POSIX-style lock to a file
SYNOPSIS¶
int posix_lock_file(struct file * filp, struct file_lock * fl, struct file_lock * conflock);
ARGUMENTS¶
struct file * filp
The file to apply the lock to
struct file_lock * fl
The lock to be applied
struct file_lock * conflock
Place to return a copy of the conflicting lock, if
found.
DESCRIPTION¶
Add a POSIX style lock to a file. We merge adjacent & overlapping locks whenever possible. POSIX locks are sorted by owner task, then by starting address
Note that if called with an FL_EXISTS argument, the caller may determine whether or not a lock was successfully freed by testing the return value for -ENOENT.
COPYRIGHT¶
| July 2017 | Kernel Hackers Manual 4.12 |