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Minor cleanup for locks API

PATCH Superseded Benjamin Coddington 2 participants 8 messages Oct 22, 2015

Subsystems (13)
VFS Staging NFS client NFS server +9 more subsystems

v1 of 2 Superseded Latest is v2 →

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Benjamin Coddington

author
#0 lore raw

cover Minor cleanup for locks API

NFS has recently been moving things around to cope with the situation where a struct file may not be available during an unlock. That work has presented an opportunity to do a minor cleanup on the locks API.

Users of posix_lock_file_wait() (for FL_POSIX style locks) and flock_lock_file_wait() (for FL_FLOCK style locks) can instead call locks_lock_file_wait() for both lock types. Because the passed-in file_lock specifies its own type, the correct function can be selected on behalf of the user.

This work allows further cleanup within NFS and lockd which will be submitted separately.

Benjamin Coddington (3):
locks: introduce locks_lock_inode_wait()
Move locks API users to locks_lock_inode_wait()
locks: cleanup posix_lock_inode_wait and flock_lock_inode_wait

 drivers/staging/lustre/lustre/llite/file.c |    8 +-----
 fs/9p/vfs_file.c                           |    4 +-
 fs/ceph/locks.c                            |    4 +-
 fs/cifs/file.c                             |    2 +-
 fs/dlm/plock.c                             |    4 +-
 fs/fuse/file.c                             |    2 +-
 fs/gfs2/file.c                             |    8 +++---
 fs/lockd/clntproc.c                        |   13 +----------
 fs/locks.c                                 |   31 +++++++++++++++++++++++----
 fs/nfs/file.c                              |   13 +----------
 fs/nfs/nfs4proc.c                          |   13 +----------
 fs/ocfs2/locks.c                           |    8 +++---
 include/linux/fs.h                         |   21 +++---------------
 13 files changed, 51 insertions(+), 80 deletions(-)
author
#1 lore raw

PATCH 1/3 locks: introduce locks_lock_inode_wait()

Users of the locks API commonly call either posix_lock_file_wait() or flock_lock_file_wait() depending upon the lock type. Add a new function locks_lock_inode_wait() which will check and call the correct function for the type of lock passed in.

Signed-off-by Benjamin Coddington <[email protected]>
---
 fs/locks.c         |   24 ++++++++++++++++++++++++
 include/linux/fs.h |   11 +++++++++++
 2 files changed, 35 insertions(+), 0 deletions(-)
fs/locks.c +24 -0
index 2a54c80..68b1784 100644
@@ -1876,6 +1876,30 @@ int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl)
 EXPORT_SYMBOL(flock_lock_inode_wait);
 
 /**
+ * locks_lock_inode_wait - Apply a lock to an inode
+ * @inode: inode of the file to apply to
+ * @fl: The lock to be applied
+ *
+ * Apply a POSIX or FLOCK style lock request to an inode.
+ */
+int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl)
+{
+	int res = 0;
+	switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
+		case FL_POSIX:
+			res = posix_lock_inode_wait(inode, fl);
+			break;
+		case FL_FLOCK:
+			res = flock_lock_inode_wait(inode, fl);
+			break;
+		default:
+			BUG();
+	}
+	return res;
+}
+EXPORT_SYMBOL(locks_lock_inode_wait);
+
+/**
  *	sys_flock: - flock() system call.
  *	@fd: the file descriptor to lock.
  *	@cmd: the type of lock to apply.
include/linux/fs.h +11 -0
index 72d8a84..2e283b7 100644
@@ -1059,6 +1059,7 @@ extern int vfs_test_lock(struct file *, struct file_lock *);
 extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
 extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
 extern int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl);
+extern int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
 extern int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
 extern void lease_get_mtime(struct inode *, struct timespec *time);
 extern int generic_setlease(struct file *, long, struct file_lock **, void **priv);

@@ -1177,6 +1178,11 @@ static inline int flock_lock_inode_wait(struct inode *inode,
 	return -ENOLCK;
 }
 
+static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
+{
+	return -ENOLCK;
+}
+
 static inline int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
 {
 	return 0;

@@ -1225,6 +1231,11 @@ static inline int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
 	return flock_lock_inode_wait(file_inode(filp), fl);
 }
 
+static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
+{
+	return locks_lock_inode_wait(file_inode(filp), fl);
+}
+
 struct fasync_struct {
 	spinlock_t		fa_lock;
 	int			magic;
Signature · 1 line
1.7.1
author
#4 lore raw

PATCH 2/3 Move locks API users to locks_lock_inode_wait()

In reply to Benjamin Coddington

Instead of having users check for FL_POSIX or FL_FLOCK to call the correct locks API function, use the check within locks_lock_inode_wait(). This allows for some later cleanup.

Signed-off-by Benjamin Coddington <[email protected]>
---
 drivers/staging/lustre/lustre/llite/file.c |    8 ++------
 fs/9p/vfs_file.c                           |    4 ++--
 fs/ceph/locks.c                            |    4 ++--
 fs/cifs/file.c                             |    2 +-
 fs/dlm/plock.c                             |    4 ++--
 fs/fuse/file.c                             |    2 +-
 fs/gfs2/file.c                             |    8 ++++----
 fs/lockd/clntproc.c                        |   13 +------------
 fs/locks.c                                 |    2 +-
 fs/nfs/file.c                              |   13 +------------
 fs/nfs/nfs4proc.c                          |   13 +------------
 fs/ocfs2/locks.c                           |    8 ++++----
 12 files changed, 22 insertions(+), 59 deletions(-)
drivers/staging/lustre/lustre/llite/file.c +2 -6
index dcd0c6d..4edbf46 100644
@@ -2763,13 +2763,9 @@ ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock)
 	rc = md_enqueue(sbi->ll_md_exp, &einfo, NULL,
 			op_data, &lockh, &flock, 0, NULL /* req */, flags);
 
-	if ((file_lock->fl_flags & FL_FLOCK) &&
-	    (rc == 0 || file_lock->fl_type == F_UNLCK))
-		rc2  = flock_lock_file_wait(file, file_lock);
-	if ((file_lock->fl_flags & FL_POSIX) &&
-	    (rc == 0 || file_lock->fl_type == F_UNLCK) &&
+	if ((rc == 0 || file_lock->fl_type == F_UNLCK) &&
 	    !(flags & LDLM_FL_TEST_LOCK))
-		rc2  = posix_lock_file_wait(file, file_lock);
+		rc2  = locks_lock_file_wait(file, file_lock);
 
 	if (rc2 && file_lock->fl_type != F_UNLCK) {
 		einfo.ei_mode = LCK_NL;
fs/9p/vfs_file.c +2 -2
index 3abc447..f23fd86 100644
@@ -161,7 +161,7 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
 	if ((fl->fl_flags & FL_POSIX) != FL_POSIX)
 		BUG();
 
-	res = posix_lock_file_wait(filp, fl);
+	res = locks_lock_file_wait(filp, fl);
 	if (res < 0)
 		goto out;
 

@@ -231,7 +231,7 @@ out_unlock:
 	if (res < 0 && fl->fl_type != F_UNLCK) {
 		fl_type = fl->fl_type;
 		fl->fl_type = F_UNLCK;
-		res = posix_lock_file_wait(filp, fl);
+		res = locks_lock_file_wait(filp, fl);
 		fl->fl_type = fl_type;
 	}
 out:
fs/ceph/locks.c +2 -2
index 6706bde..a2cb0c2 100644
@@ -228,12 +228,12 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
 	err = ceph_lock_message(CEPH_LOCK_FLOCK, CEPH_MDS_OP_SETFILELOCK,
 				file, lock_cmd, wait, fl);
 	if (!err) {
-		err = flock_lock_file_wait(file, fl);
+		err = locks_lock_file_wait(file, fl);
 		if (err) {
 			ceph_lock_message(CEPH_LOCK_FLOCK,
 					  CEPH_MDS_OP_SETFILELOCK,
 					  file, CEPH_LOCK_UNLOCK, 0, fl);
-			dout("got %d on flock_lock_file_wait, undid lock", err);
+			dout("got %d on locks_lock_file_wait, undid lock", err);
 		}
 	}
 	return err;
fs/cifs/file.c +1 -1
index e2a6af1..6afdad7 100644
@@ -1553,7 +1553,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
 
 out:
 	if (flock->fl_flags & FL_POSIX && !rc)
-		rc = posix_lock_file_wait(file, flock);
+		rc = locks_lock_file_wait(file, flock);
 	return rc;
 }
fs/dlm/plock.c +2 -2
index 5532f09..3585cc0 100644
@@ -172,7 +172,7 @@ int dlm_posix_lock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
 	rv = op->info.rv;
 
 	if (!rv) {
-		if (posix_lock_file_wait(file, fl) < 0)
+		if (locks_lock_file_wait(file, fl) < 0)
 			log_error(ls, "dlm_posix_lock: vfs lock error %llx",
 				  (unsigned long long)number);
 	}

@@ -262,7 +262,7 @@ int dlm_posix_unlock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
 	/* cause the vfs unlock to return ENOENT if lock is not found */
 	fl->fl_flags |= FL_EXISTS;
 
-	rv = posix_lock_file_wait(file, fl);
+	rv = locks_lock_file_wait(file, fl);
 	if (rv == -ENOENT) {
 		rv = 0;
 		goto out_free;
fs/fuse/file.c +1 -1
index f523f2f..e0faf8f 100644
@@ -2189,7 +2189,7 @@ static int fuse_file_flock(struct file *file, int cmd, struct file_lock *fl)
 	int err;
 
 	if (fc->no_flock) {
-		err = flock_lock_file_wait(file, fl);
+		err = locks_lock_file_wait(file, fl);
 	} else {
 		struct fuse_file *ff = file->private_data;
fs/gfs2/file.c +4 -4
index cf4ab89..9287a2d 100644
@@ -1000,7 +1000,7 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
 	}
 	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) {
 		if (fl->fl_type == F_UNLCK)
-			posix_lock_file_wait(file, fl);
+			locks_lock_file_wait(file, fl);
 		return -EIO;
 	}
 	if (IS_GETLK(cmd))

@@ -1031,7 +1031,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
 	if (gl) {
 		if (fl_gh->gh_state == state)
 			goto out;
-		flock_lock_file_wait(file,
+		locks_lock_file_wait(file,
 				     &(struct file_lock){.fl_type = F_UNLCK});
 		gfs2_glock_dq(fl_gh);
 		gfs2_holder_reinit(state, flags, fl_gh);

@@ -1056,7 +1056,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
 		if (error == GLR_TRYFAILED)
 			error = -EAGAIN;
 	} else {
-		error = flock_lock_file_wait(file, fl);
+		error = locks_lock_file_wait(file, fl);
 		gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
 	}
 

@@ -1071,7 +1071,7 @@ static void do_unflock(struct file *file, struct file_lock *fl)
 	struct gfs2_holder *fl_gh = &fp->f_fl_gh;
 
 	mutex_lock(&fp->f_fl_mutex);
-	flock_lock_file_wait(file, fl);
+	locks_lock_file_wait(file, fl);
 	if (fl_gh->gh_gl) {
 		gfs2_glock_dq(fl_gh);
 		gfs2_holder_uninit(fl_gh);
fs/lockd/clntproc.c +1 -12
index acd3947..1129520 100644
@@ -474,18 +474,7 @@ static void nlmclnt_locks_init_private(struct file_lock *fl, struct nlm_host *ho
 
 static int do_vfs_lock(struct file_lock *fl)
 {
-	int res = 0;
-	switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
-		case FL_POSIX:
-			res = posix_lock_file_wait(fl->fl_file, fl);
-			break;
-		case FL_FLOCK:
-			res = flock_lock_file_wait(fl->fl_file, fl);
-			break;
-		default:
-			BUG();
-	}
-	return res;
+	return locks_lock_file_wait(fl->fl_file, fl);
 }
 
 /*
fs/locks.c +1 -1
index 68b1784..94d50d3 100644
@@ -1955,7 +1955,7 @@ SYSCALL_DEFINE2(flock, unsigned int, fd, unsigned int, cmd)
 					  (can_sleep) ? F_SETLKW : F_SETLK,
 					  lock);
 	else
-		error = flock_lock_file_wait(f.file, lock);
+		error = locks_lock_file_wait(f.file, lock);
 
  out_free:
 	locks_free_lock(lock);
fs/nfs/file.c +1 -12
index c0f9b1e..37f639d 100644
@@ -738,18 +738,7 @@ out_noconflict:
 
 static int do_vfs_lock(struct file *file, struct file_lock *fl)
 {
-	int res = 0;
-	switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
-		case FL_POSIX:
-			res = posix_lock_file_wait(file, fl);
-			break;
-		case FL_FLOCK:
-			res = flock_lock_file_wait(file, fl);
-			break;
-		default:
-			BUG();
-	}
-	return res;
+	return locks_lock_file_wait(file, fl);
 }
 
 static int
fs/nfs/nfs4proc.c +1 -12
index 5133bb1..0e5ff69 100644
@@ -5513,18 +5513,7 @@ static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *
 
 static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
 {
-	int res = 0;
-	switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
-		case FL_POSIX:
-			res = posix_lock_inode_wait(inode, fl);
-			break;
-		case FL_FLOCK:
-			res = flock_lock_inode_wait(inode, fl);
-			break;
-		default:
-			BUG();
-	}
-	return res;
+	return locks_lock_inode_wait(inode, fl);
 }
 
 struct nfs4_unlockdata {
fs/ocfs2/locks.c +4 -4
index 6b6d092..652ece4 100644
@@ -66,7 +66,7 @@ static int ocfs2_do_flock(struct file *file, struct inode *inode,
 		 * level.
 		 */
 
-		flock_lock_file_wait(file,
+		locks_lock_file_wait(file,
 				     &(struct file_lock){.fl_type = F_UNLCK});
 
 		ocfs2_file_unlock(file);

@@ -81,7 +81,7 @@ static int ocfs2_do_flock(struct file *file, struct inode *inode,
 		goto out;
 	}
 
-	ret = flock_lock_file_wait(file, fl);
+	ret = locks_lock_file_wait(file, fl);
 	if (ret)
 		ocfs2_file_unlock(file);
 

@@ -98,7 +98,7 @@ static int ocfs2_do_funlock(struct file *file, int cmd, struct file_lock *fl)
 
 	mutex_lock(&fp->fp_mutex);
 	ocfs2_file_unlock(file);
-	ret = flock_lock_file_wait(file, fl);
+	ret = locks_lock_file_wait(file, fl);
 	mutex_unlock(&fp->fp_mutex);
 
 	return ret;

@@ -119,7 +119,7 @@ int ocfs2_flock(struct file *file, int cmd, struct file_lock *fl)
 
 	if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
 	    ocfs2_mount_local(osb))
-		return flock_lock_file_wait(file, fl);
+		return locks_lock_file_wait(file, fl);
 
 	if (fl->fl_type == F_UNLCK)
 		return ocfs2_do_funlock(file, cmd, fl);
Signature · 1 line
1.7.1
author
#5 lore raw

PATCH 3/3 locks: cleanup posix_lock_inode_wait and flock_lock_inode_wait

In reply to Benjamin Coddington

All callers use locks_lock_inode_wait() instead.

Signed-off-by Benjamin Coddington <[email protected]>
---
 fs/locks.c         |    5 +----
 include/linux/fs.h |   24 ------------------------
 2 files changed, 1 insertions(+), 28 deletions(-)
fs/locks.c +1 -4
index 94d50d3..b6f3c92 100644
@@ -1167,8 +1167,7 @@ EXPORT_SYMBOL(posix_lock_file);
  * @inode: inode of file to which lock request should be applied
  * @fl: The lock to be applied
  *
- * Variant of posix_lock_file_wait that does not take a filp, and so can be
- * used after the filp has already been torn down.
+ * Apply a POSIX style lock request to an inode.
  */
 int posix_lock_inode_wait(struct inode *inode, struct file_lock *fl)
 {

@@ -1187,7 +1186,6 @@ int posix_lock_inode_wait(struct inode *inode, struct file_lock *fl)
 	}
 	return error;
 }
-EXPORT_SYMBOL(posix_lock_inode_wait);
 
 /**
  * locks_mandatory_locked - Check for an active lock

@@ -1873,7 +1871,6 @@ int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl)
 	}
 	return error;
 }
-EXPORT_SYMBOL(flock_lock_inode_wait);
 
 /**
  * locks_lock_inode_wait - Apply a lock to an inode
include/linux/fs.h +0 -24
index 2e283b7..05b07c9 100644
@@ -1053,12 +1053,10 @@ extern void locks_remove_file(struct file *);
 extern void locks_release_private(struct file_lock *);
 extern void posix_test_lock(struct file *, struct file_lock *);
 extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *);
-extern int posix_lock_inode_wait(struct inode *, struct file_lock *);
 extern int posix_unblock_lock(struct file_lock *);
 extern int vfs_test_lock(struct file *, struct file_lock *);
 extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
 extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
-extern int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl);
 extern int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
 extern int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
 extern void lease_get_mtime(struct inode *, struct timespec *time);

@@ -1145,12 +1143,6 @@ static inline int posix_lock_file(struct file *filp, struct file_lock *fl,
 	return -ENOLCK;
 }
 
-static inline int posix_lock_inode_wait(struct inode *inode,
-					struct file_lock *fl)
-{
-	return -ENOLCK;
-}
-
 static inline int posix_unblock_lock(struct file_lock *waiter)
 {
 	return -ENOENT;

@@ -1172,12 +1164,6 @@ static inline int vfs_cancel_lock(struct file *filp, struct file_lock *fl)
 	return 0;
 }
 
-static inline int flock_lock_inode_wait(struct inode *inode,
-					struct file_lock *request)
-{
-	return -ENOLCK;
-}
-
 static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
 {
 	return -ENOLCK;

@@ -1221,16 +1207,6 @@ static inline struct inode *file_inode(const struct file *f)
 	return f->f_inode;
 }
 
-static inline int posix_lock_file_wait(struct file *filp, struct file_lock *fl)
-{
-	return posix_lock_inode_wait(file_inode(filp), fl);
-}
-
-static inline int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
-{
-	return flock_lock_inode_wait(file_inode(filp), fl);
-}
-
 static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
 {
 	return locks_lock_inode_wait(file_inode(filp), fl);
Signature · 1 line
1.7.1
build bot
#2 lore raw

Re: [PATCH 1/3] locks: introduce locks_lock_inode_wait()

In reply to Benjamin Coddington
reproduce:

Hi Benjamin,

[auto build test ERROR on jlayton/linux-next -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url:    https://github.com/0day-ci/linux/commits/Benjamin-Coddington/locks-introduce-locks_lock_inode_wait/20151022-233848
config: x86_64-allnoconfig (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64

All errors (new ones prefixed by >>):

In file included from include/linux/cgroup.h:17:0,

                    from include/linux/memcontrol.h:22,
                    from include/linux/swap.h:8,
                    from include/linux/suspend.h:4,
                    from arch/x86/kernel/asm-offsets.c:12:
>> include/linux/fs.h:1234:19: error: redefinition of 'locks_lock_file_wait'
    static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
                      ^
   include/linux/fs.h:1181:19: note: previous definition of 'locks_lock_file_wait' was here
    static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
                      ^
   include/linux/fs.h: In function 'locks_lock_file_wait':
>> include/linux/fs.h:1236:9: error: implicit declaration of function 'locks_lock_inode_wait' [-Werror=implicit-function-declaration]
     return locks_lock_inode_wait(file_inode(filp), fl);
            ^

cc1: some warnings being treated as errors make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [sub-make] Error 2

vim +/locks_lock_file_wait +1234 include/linux/fs.h

1228
1229 static inline int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
1230 {
1231 return flock_lock_inode_wait(file_inode(filp), fl);
1232 }
1233

> 1234	static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
  1235	{
> 1236		return locks_lock_inode_wait(file_inode(filp), fl);

1237 }
1238
1239 struct fasync_struct {

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

author
#3 lore raw

Re: [PATCH 1/3] locks: introduce locks_lock_inode_wait()

In reply to Benjamin Coddington
Quoted 59 lines · Benjamin Coddington

Users of the locks API commonly call either posix_lock_file_wait() or flock_lock_file_wait() depending upon the lock type. Add a new function locks_lock_inode_wait() which will check and call the correct function for the type of lock passed in.

Signed-off-by Benjamin Coddington <[email protected]>
---
 fs/locks.c         |   24 ++++++++++++++++++++++++
 include/linux/fs.h |   11 +++++++++++
 2 files changed, 35 insertions(+), 0 deletions(-)
fs/locks.c +24 -0
index 2a54c80..68b1784 100644
@@ -1876,6 +1876,30 @@ int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl)
 EXPORT_SYMBOL(flock_lock_inode_wait);
 
 /**
+ * locks_lock_inode_wait - Apply a lock to an inode
+ * @inode: inode of the file to apply to
+ * @fl: The lock to be applied
+ *
+ * Apply a POSIX or FLOCK style lock request to an inode.
+ */
+int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl)
+{
+	int res = 0;
+	switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
+		case FL_POSIX:
+			res = posix_lock_inode_wait(inode, fl);
+			break;
+		case FL_FLOCK:
+			res = flock_lock_inode_wait(inode, fl);
+			break;
+		default:
+			BUG();
+	}
+	return res;
+}
+EXPORT_SYMBOL(locks_lock_inode_wait);
+
+/**
  *	sys_flock: - flock() system call.
  *	@fd: the file descriptor to lock.
  *	@cmd: the type of lock to apply.
include/linux/fs.h +1 -0
index 72d8a84..2e283b7 100644
@@ -1059,6 +1059,7 @@ extern int vfs_test_lock(struct file *, struct file_lock *);
 extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
 extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
 extern int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl);
+extern int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
 extern int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
 extern void lease_get_mtime(struct inode *, struct timespec *time);
 extern int generic_setlease(struct file *, long, struct file_lock **, void **priv);

include/linux/fs.h static inline int flock_lock_inode_wait(struct inode *inode, · line 1185

Quoted 8 lines
include/linux/fs.h +5 -0
@@ -1177,6 +1178,11 @@ static inline int flock_lock_inode_wait(struct inode *inode,
 	return -ENOLCK;
 }
 
+static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
+{
+	return -ENOLCK;
+}
+

So, this is obviously wrong - thank you 0-day robot. Yes, I did build and test against these patches, but went back and added this after I realized it should work w/o CONFIG_FILE_LOCKING. I'll re-send.

Ben

Quoted 23 lines
include/linux/fs.h +5 -1
 static inline int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
 {
 	return 0;

@@ -1225,6 +1231,11 @@ static inline int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
 	return flock_lock_inode_wait(file_inode(filp), fl);
 }
 
+static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
+{
+	return locks_lock_inode_wait(file_inode(filp), fl);
+}
+
 struct fasync_struct {
 	spinlock_t		fa_lock;
 	int			magic;
--

1.7.1

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build bot
#6 lore raw

[RFC PATCH] locks: posix_lock_inode_wait() can be static

In reply to Benjamin Coddington
Signed-off-by: Fengguang Wu <[email protected]>
Signed-off-by Fengguang Wu <[email protected]>
---
 locks.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
fs/locks.c +2 -2
index daf4664..0d2b326 100644
@@ -1173,7 +1173,7 @@ EXPORT_SYMBOL(posix_lock_file);
  *
  * Apply a POSIX style lock request to an inode.
  */
-int posix_lock_inode_wait(struct inode *inode, struct file_lock *fl)
+static int posix_lock_inode_wait(struct inode *inode, struct file_lock *fl)
 {
 	int error;
 	might_sleep ();

@@ -1860,7 +1860,7 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
  *
  * Apply a FLOCK style lock request to an inode.
  */
-int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl)
+static int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl)
 {
 	int error;
 	might_sleep();
build bot
#7 lore raw

Re: [PATCH 3/3] locks: cleanup posix_lock_inode_wait and flock_lock_inode_wait

In reply to Benjamin Coddington
url: https://github.com/0day-ci/linux/commits/Benjamin-Coddington/locks-introduce-locks_lock_inode_wait/20151022-233848 reproduce:

Hi Benjamin,

[auto build test WARNING on jlayton/linux-next -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url: https://github.com/0day-ci/linux/commits/Benjamin-Coddington/locks-introduce-locks_lock_inode_wait/20151022-233848
reproduce:

        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__

sparse warnings: (new ones prefixed by >>)

>> fs/locks.c:1176:5: sparse: symbol 'posix_lock_inode_wait' was not declared. Should it be static?
>> fs/locks.c:1863:5: sparse: symbol 'flock_lock_inode_wait' was not declared. Should it be static?

Please review and possibly fold the followup patch.

---
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