Allow callers to pass in an inode instead of a filp.
Signed-off-by: Jeff Layton <jeff.layton@xxxxxxxxxxxxxxx>
---
fs/locks.c | 50 ++++++++++++++++++++++++++++++++++++++------------
include/linux/fs.h | 14 ++++++++++++++
2 files changed, 52 insertions(+), 12 deletions(-)
diff --git a/fs/locks.c b/fs/locks.c
index 4366b7c54e6d..ba268a503c1b 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1163,20 +1163,19 @@ int posix_lock_file(struct file *filp, struct file_lock *fl,
EXPORT_SYMBOL(posix_lock_file);
/**
- * posix_lock_file_wait - Apply a POSIX-style lock to a file
- * @filp: The file to apply the lock to
+ * posix_lock_inode_wait - Apply a POSIX-style lock to a file
+ * @inode: inode of file to which lock request should be applied
* @fl: The lock to be applied
*
- * 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
+ * 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.
*/
-int posix_lock_file_wait(struct file *filp, struct file_lock *fl)
+int posix_lock_inode_wait(struct inode *inode, struct file_lock *fl)
{
int error;
might_sleep ();
for (;;) {
- error = posix_lock_file(filp, fl, NULL);
+ error = __posix_lock_file(inode, fl, NULL);
if (error != FILE_LOCK_DEFERRED)
break;
error = wait_event_interruptible(fl->fl_wait, !fl->fl_next);
@@ -1188,6 +1187,21 @@ int posix_lock_file_wait(struct file *filp, struct file_lock *fl)
}
return error;
}
+EXPORT_SYMBOL(posix_lock_inode_wait);
+
+/**
+ * posix_lock_file_wait - Apply a POSIX-style lock to a file
+ * @filp: The file to apply the lock to
+ * @fl: The lock to be applied
+ *
+ * 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
+ */
+int posix_lock_file_wait(struct file *filp, struct file_lock *fl)
+{
+ return posix_lock_inode_wait(file_inode(filp), fl);
+}
EXPORT_SYMBOL(posix_lock_file_wait);
/**
@@ -1850,18 +1864,18 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
}
/**
- * flock_lock_file_wait - Apply a FLOCK-style lock to a file
- * @filp: The file to apply the lock to
+ * flock_lock_inode_wait - Apply a FLOCK-style lock to a file
+ * @inode: inode of the file to apply to
* @fl: The lock to be applied
*
- * Add a FLOCK style lock to a file.
+ * Apply a FLOCK style lock request to an inode.
*/
-int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
+int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl)
{
int error;
might_sleep();
for (;;) {
- error = flock_lock_inode(file_inode(filp), fl);
+ error = flock_lock_inode(inode, fl);
if (error != FILE_LOCK_DEFERRED)
break;
error = wait_event_interruptible(fl->fl_wait, !fl->fl_next);
@@ -1873,7 +1887,19 @@ int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
}
return error;
}
+EXPORT_SYMBOL(flock_lock_inode_wait);
+/**
+ * flock_lock_file_wait - Apply a FLOCK-style lock to a file
+ * @filp: The file to apply the lock to
+ * @fl: The lock to be applied
+ *
+ * Add a FLOCK style lock to a file.
+ */
+int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
+{
+ return flock_lock_inode_wait(file_inode(filp), fl);
+}
EXPORT_SYMBOL(flock_lock_file_wait);
/**
diff --git a/include/linux/fs.h b/include/linux/fs.h
index a0653e560c26..4c990edd1377 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1046,11 +1046,13 @@ 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_lock_file_wait(struct file *, 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 flock_lock_file_wait(struct file *filp, 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);
@@ -1137,6 +1139,12 @@ 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_lock_file_wait(struct file *filp, struct file_lock *fl)
{
return -ENOLCK;
@@ -1163,6 +1171,12 @@ 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 flock_lock_file_wait(struct file *filp,
struct file_lock *request)
{
--
2.4.3
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