fs/xfs/xfs_file.c

378  * @iolock, and returns with it held.  Might upgrade the iolock to exclusive
385 	unsigned int		*iolock)
405 		error = xfs_break_layouts(inode, iolock, BREAK_WRITE);
415 	if (*iolock == XFS_IOLOCK_SHARED && !IS_NOSEC(inode)) {
416 		xfs_iunlock(ip, *iolock);
417 		*iolock = XFS_IOLOCK_EXCL;
418 		error = xfs_ilock_iocb(iocb, *iolock);
420 			*iolock = 0;
429 	 * write.  If zeroing is needed and we are currently holding the iolock
458 			if (*iolock == XFS_IOLOCK_SHARED) {
459 				xfs_iunlock(ip, *iolock);
460 				*iolock = XFS_IOLOCK_EXCL;
461 				xfs_ilock(ip, *iolock);
588 	unsigned int		iolock = XFS_IOLOCK_SHARED;
591 	ret = xfs_ilock_iocb_for_write(iocb, &iolock);
594 	ret = xfs_file_write_checks(iocb, from, &iolock);
600 	 * the iolock back to shared if we had to take the exclusive lock in
603 	if (iolock == XFS_IOLOCK_EXCL) {
605 		iolock = XFS_IOLOCK_SHARED;
611 	if (iolock)
612 		xfs_iunlock(ip, iolock);
641 	unsigned int		iolock = XFS_IOLOCK_SHARED;
654 		iolock = XFS_IOLOCK_EXCL;
658 	ret = xfs_ilock_iocb_for_write(iocb, &iolock);
672 	ret = xfs_file_write_checks(iocb, from, &iolock);
696 		xfs_iunlock(ip, iolock);
701 	if (iolock)
702 		xfs_iunlock(ip, iolock);
730 	unsigned int		iolock = XFS_IOLOCK_EXCL;
734 	ret = xfs_ilock_iocb(iocb, iolock);
737 	ret = xfs_file_write_checks(iocb, from, &iolock);
750 	if (iolock)
751 		xfs_iunlock(ip, iolock);
773 	unsigned int		iolock;
776 	iolock = XFS_IOLOCK_EXCL;
777 	ret = xfs_ilock_iocb(iocb, iolock);
781 	ret = xfs_file_write_checks(iocb, from, &iolock);
800 		xfs_iunlock(ip, iolock);
810 		xfs_iunlock(ip, iolock);
817 	if (iolock)
818 		xfs_iunlock(ip, iolock);
897 	uint			*iolock,
914 			error = xfs_break_leased_layouts(inode, iolock, &retry);
955 	uint			iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
964 	xfs_ilock(ip, iolock);
965 	error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
1131 	xfs_iunlock(ip, iolock);