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Commit 710b7216 authored by J. Bruce Fields's avatar J. Bruce Fields
Browse files

locks: move F_INPROGRESS from fl_type to fl_flags field 



F_INPROGRESS isn't exposed to userspace.  To me it makes more sense in
fl_flags....

Reviewed-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent ab83fa4b

arch/alpha/include/asm/fcntl.h

+0 −2
Original line number Diff line number Diff line
@@ -51,8 +51,6 @@ 
#define F_EXLCK		16	/* or 3 */

#define F_SHLCK		32	/* or 4 */



#define F_INPROGRESS	64



#include <asm-generic/fcntl.h>



#endif

fs/locks.c

+8 −6
Original line number Diff line number Diff line
@@ -135,7 +135,7 @@ 


static bool lease_breaking(struct file_lock *fl)

{

	return fl->fl_type & F_INPROGRESS;

	return fl->fl_flags & FL_INPROGRESS;

}



int leases_enable = 1;
@@ -1132,6 +1132,7 @@ int lease_modify(struct file_lock **before, int arg) 


	if (error)

		return error;

	fl->fl_flags &= ~FL_INPROGRESS;

	locks_wake_up_blocks(fl);

	if (arg == F_UNLCK)

		locks_delete_lock(before);
@@ -1152,7 +1153,7 @@ static void time_out_leases(struct inode *inode) 
			before = &fl->fl_next;

			continue;

		}

		lease_modify(before, fl->fl_type & ~F_INPROGRESS);

		lease_modify(before, fl->fl_type);

		if (fl == *before)	/* lease_modify may have freed fl */

			before = &fl->fl_next;

	}
@@ -1193,13 +1194,13 @@ int __break_lease(struct inode *inode, unsigned int mode) 


	if (want_write) {

		/* If we want write access, we have to revoke any lease. */

		future = F_UNLCK | F_INPROGRESS;

		future = F_UNLCK;

	} else if (lease_breaking(flock)) {

		/* If the lease is already being broken, we just leave it */

		future = flock->fl_type;

	} else if (flock->fl_type & F_WRLCK) {

		/* Downgrade the exclusive lease to a read-only lease. */

		future = F_RDLCK | F_INPROGRESS;

		future = F_RDLCK;

	} else {

		/* the existing lease was read-only, so we can read too. */

		goto out;
@@ -1221,6 +1222,7 @@ int __break_lease(struct inode *inode, unsigned int mode) 
	for (fl = flock; fl && IS_LEASE(fl); fl = fl->fl_next) {

		if (fl->fl_type != future) {

			fl->fl_type = future;

			fl->fl_flags |= FL_INPROGRESS;

			fl->fl_break_time = break_time;

			/* lease must have lmops break callback */

			fl->fl_lmops->lm_break(fl);
@@ -1319,7 +1321,7 @@ int fcntl_getlease(struct file *filp) 
	for (fl = filp->f_path.dentry->d_inode->i_flock; fl && IS_LEASE(fl);

			fl = fl->fl_next) {

		if (fl->fl_file == filp) {

			type = fl->fl_type & ~F_INPROGRESS;

			type = fl->fl_type;

			break;

		}

	}
@@ -1384,7 +1386,7 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) 
			before = &fl->fl_next) {

		if (fl->fl_file == filp)

			my_before = before;

		else if (fl->fl_type == (F_INPROGRESS | F_UNLCK))

		else if ((fl->fl_type == F_UNLCK) && lease_breaking(fl))

			/*

			 * Someone is in the process of opening this

			 * file for writing so we may not take an

include/asm-generic/fcntl.h

+0 −5
Original line number Diff line number Diff line
@@ -145,11 +145,6 @@ struct f_owner_ex { 
#define F_SHLCK		8	/* or 4 */

#endif



/* for leases */

#ifndef F_INPROGRESS

#define F_INPROGRESS	16

#endif



/* operations for bsd flock(), also used by the kernel implementation */

#define LOCK_SH		1	/* shared lock */

#define LOCK_EX		2	/* exclusive lock */

include/linux/fs.h

+2 −1
Original line number Diff line number Diff line
@@ -1065,6 +1065,7 @@ static inline int file_check_writeable(struct file *filp) 
#define FL_LEASE	32	/* lease held on this file */

#define FL_CLOSE	64	/* unlock on close */

#define FL_SLEEP	128	/* A blocking lock */

#define FL_INPROGRESS	256	/* Lease is being broken */



/*

 * Special return value from posix_lock_file() and vfs_lock_file() for
@@ -1111,7 +1112,7 @@ struct file_lock { 
	struct list_head fl_link;	/* doubly linked list of all locks */

	struct list_head fl_block;	/* circular list of blocked processes */

	fl_owner_t fl_owner;

	unsigned char fl_flags;

	unsigned int fl_flags;

	unsigned char fl_type;

	unsigned int fl_pid;

	struct pid *fl_nspid;