locks: move flock locks to file_lock_context
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Acked-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/locks.c b/fs/locks.c
index 526d5fc..055df53 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -694,6 +694,14 @@
locks_insert_global_locks(fl);
}
+static void
+locks_insert_lock_ctx(struct file_lock *fl, struct list_head *before)
+{
+ fl->fl_nspid = get_pid(task_tgid(current));
+ list_add_tail(&fl->fl_list, before);
+ locks_insert_global_locks(fl);
+}
+
/**
* locks_delete_lock - Delete a lock and then free it.
* @thisfl_p: pointer that points to the fl_next field of the previous
@@ -739,6 +747,18 @@
locks_free_lock(fl);
}
+static void
+locks_delete_lock_ctx(struct file_lock *fl, struct list_head *dispose)
+{
+ locks_delete_global_locks(fl);
+ if (fl->fl_nspid) {
+ put_pid(fl->fl_nspid);
+ fl->fl_nspid = NULL;
+ }
+ locks_wake_up_blocks(fl);
+ list_move(&fl->fl_list, dispose);
+}
+
/* Determine if lock sys_fl blocks lock caller_fl. Common functionality
* checks for shared/exclusive status of overlapping locks.
*/
@@ -888,12 +908,17 @@
static int flock_lock_file(struct file *filp, struct file_lock *request)
{
struct file_lock *new_fl = NULL;
- struct file_lock **before;
- struct inode * inode = file_inode(filp);
+ struct file_lock *fl;
+ struct file_lock_context *ctx;
+ struct inode *inode = file_inode(filp);
int error = 0;
- int found = 0;
+ bool found = false;
LIST_HEAD(dispose);
+ ctx = locks_get_lock_context(inode);
+ if (!ctx)
+ return -ENOMEM;
+
if (!(request->fl_flags & FL_ACCESS) && (request->fl_type != F_UNLCK)) {
new_fl = locks_alloc_lock();
if (!new_fl)
@@ -904,18 +929,13 @@
if (request->fl_flags & FL_ACCESS)
goto find_conflict;
- for_each_lock(inode, before) {
- struct file_lock *fl = *before;
- if (IS_POSIX(fl))
- break;
- if (IS_LEASE(fl))
- continue;
+ list_for_each_entry(fl, &ctx->flc_flock, fl_list) {
if (filp != fl->fl_file)
continue;
if (request->fl_type == fl->fl_type)
goto out;
- found = 1;
- locks_delete_lock(before, &dispose);
+ found = true;
+ locks_delete_lock_ctx(fl, &dispose);
break;
}
@@ -936,12 +956,7 @@
}
find_conflict:
- for_each_lock(inode, before) {
- struct file_lock *fl = *before;
- if (IS_POSIX(fl))
- break;
- if (IS_LEASE(fl))
- continue;
+ list_for_each_entry(fl, &ctx->flc_flock, fl_list) {
if (!flock_locks_conflict(request, fl))
continue;
error = -EAGAIN;
@@ -954,7 +969,7 @@
if (request->fl_flags & FL_ACCESS)
goto out;
locks_copy_lock(new_fl, request);
- locks_insert_lock(before, new_fl);
+ locks_insert_lock_ctx(new_fl, &ctx->flc_flock);
new_fl = NULL;
error = 0;
@@ -2412,8 +2427,9 @@
.fl_type = F_UNLCK,
.fl_end = OFFSET_MAX,
};
+ struct file_lock_context *flctx = file_inode(filp)->i_flctx;
- if (!file_inode(filp)->i_flock)
+ if (!flctx || list_empty(&flctx->flc_flock))
return;
if (filp->f_op->flock)