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fs/lock: add helper locks_owner_has_blockers to check for blockers

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[ Upstream commit 591502c5cb325b1c6ec59ab161927d606b918aa0 ]

Add helper locks_owner_has_blockers to check if there is any blockers
for a given lockowner.

Reviewed-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dai Ngo
2022-05-02 14:19:24 -07:00
committed by Greg Kroah-Hartman
parent 461d0b57c9
commit eb2eb6b6af
2 changed files with 35 additions and 0 deletions
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7
include/linux/fs.h
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@@ -1163,6 +1163,8 @@ extern void lease_unregister_notifier(struct notifier_block *);
struct files_struct;
extern void show_fd_locks(struct seq_file *f,
struct file *filp, struct files_struct *files);
extern bool locks_owner_has_blockers(struct file_lock_context *flctx,
fl_owner_t owner);
#else /* !CONFIG_FILE_LOCKING */
static inline int fcntl_getlk(struct file *file, unsigned int cmd,
struct flock __user *user)
@@ -1303,6 +1305,11 @@ static inline int lease_modify(struct file_lock *fl, int arg,
struct files_struct;
static inline void show_fd_locks(struct seq_file *f,
struct file *filp, struct files_struct *files) {}
static inline bool locks_owner_has_blockers(struct file_lock_context *flctx,
fl_owner_t owner)
{
return false;
}
#endif /* !CONFIG_FILE_LOCKING */
static inline struct inode *file_inode(const struct file *f)