locks: new locks_mandatory_area calling convention
Pass a loff_t end for the last byte instead of the 32-bit count
parameter to allow full file clones even on 32-bit architectures.
While we're at it also simplify the read/write selection.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/locks.c b/fs/locks.c
index 0d2b326..c77a299 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1227,20 +1227,16 @@
/**
* locks_mandatory_area - Check for a conflicting lock
- * @read_write: %FLOCK_VERIFY_WRITE for exclusive access, %FLOCK_VERIFY_READ
- * for shared
- * @inode: the file to check
+ * @inode: the file to check
* @filp: how the file was opened (if it was)
- * @offset: start of area to check
- * @count: length of area to check
+ * @start: first byte in the file to check
+ * @end: lastbyte in the file to check
+ * @type: %F_WRLCK for a write lock, else %F_RDLCK
*
* Searches the inode's list of locks to find any POSIX locks which conflict.
- * This function is called from rw_verify_area() and
- * locks_verify_truncate().
*/
-int locks_mandatory_area(int read_write, struct inode *inode,
- struct file *filp, loff_t offset,
- size_t count)
+int locks_mandatory_area(struct inode *inode, struct file *filp, loff_t start,
+ loff_t end, unsigned char type)
{
struct file_lock fl;
int error;
@@ -1252,9 +1248,9 @@
fl.fl_flags = FL_POSIX | FL_ACCESS;
if (filp && !(filp->f_flags & O_NONBLOCK))
sleep = true;
- fl.fl_type = (read_write == FLOCK_VERIFY_WRITE) ? F_WRLCK : F_RDLCK;
- fl.fl_start = offset;
- fl.fl_end = offset + count - 1;
+ fl.fl_type = type;
+ fl.fl_start = start;
+ fl.fl_end = end;
for (;;) {
if (filp) {