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-rw-r--r--drivers/staging/lustre/lustre/ldlm/ldlm_flock.c2
-rw-r--r--fs/9p/vfs_file.c2
-rw-r--r--fs/ceph/locks.c2
-rw-r--r--fs/cifs/cifssmb.c2
-rw-r--r--fs/dlm/plock.c2
-rw-r--r--fs/fuse/file.c6
-rw-r--r--fs/locks.c62
-rw-r--r--include/linux/fs.h1
8 files changed, 45 insertions, 34 deletions
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c b/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
index b7f28b39c7b3..abcbf075acc0 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
@@ -596,7 +596,7 @@ granted:
default:
getlk->fl_type = F_UNLCK;
}
- getlk->fl_pid = (pid_t)lock->l_policy_data.l_flock.pid;
+ getlk->fl_pid = -(pid_t)lock->l_policy_data.l_flock.pid;
getlk->fl_start = (loff_t)lock->l_policy_data.l_flock.start;
getlk->fl_end = (loff_t)lock->l_policy_data.l_flock.end;
} else {
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 3de3b4a89d89..43c242e17132 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -288,7 +288,7 @@ static int v9fs_file_getlock(struct file *filp, struct file_lock *fl)
fl->fl_end = OFFSET_MAX;
else
fl->fl_end = glock.start + glock.length - 1;
- fl->fl_pid = glock.proc_id;
+ fl->fl_pid = -glock.proc_id;
}
kfree(glock.client_id);
return res;
diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
index 64ae74472046..8cd63e8123d8 100644
--- a/fs/ceph/locks.c
+++ b/fs/ceph/locks.c
@@ -79,7 +79,7 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file,
err = ceph_mdsc_do_request(mdsc, inode, req);
if (operation == CEPH_MDS_OP_GETFILELOCK) {
- fl->fl_pid = le64_to_cpu(req->r_reply_info.filelock_reply->pid);
+ fl->fl_pid = -le64_to_cpu(req->r_reply_info.filelock_reply->pid);
if (CEPH_LOCK_SHARED == req->r_reply_info.filelock_reply->type)
fl->fl_type = F_RDLCK;
else if (CEPH_LOCK_EXCL == req->r_reply_info.filelock_reply->type)
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 72a53bd19865..118a63e7e221 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -2522,7 +2522,7 @@ CIFSSMBPosixLock(const unsigned int xid, struct cifs_tcon *tcon,
pLockData->fl_start = le64_to_cpu(parm_data->start);
pLockData->fl_end = pLockData->fl_start +
le64_to_cpu(parm_data->length) - 1;
- pLockData->fl_pid = le32_to_cpu(parm_data->pid);
+ pLockData->fl_pid = -le32_to_cpu(parm_data->pid);
}
}
diff --git a/fs/dlm/plock.c b/fs/dlm/plock.c
index d401425f602a..e631b1689228 100644
--- a/fs/dlm/plock.c
+++ b/fs/dlm/plock.c
@@ -367,7 +367,7 @@ int dlm_posix_get(dlm_lockspace_t *lockspace, u64 number, struct file *file,
locks_init_lock(fl);
fl->fl_type = (op->info.ex) ? F_WRLCK : F_RDLCK;
fl->fl_flags = FL_POSIX;
- fl->fl_pid = op->info.pid;
+ fl->fl_pid = -op->info.pid;
fl->fl_start = op->info.start;
fl->fl_end = op->info.end;
rv = 0;
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 3ee4fdc3da9e..7cd692f51d1d 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2101,11 +2101,11 @@ static int convert_fuse_file_lock(struct fuse_conn *fc,
fl->fl_end = ffl->end;
/*
- * Convert pid into the caller's pid namespace. If the pid
- * does not map into the namespace fl_pid will get set to 0.
+ * Convert pid into init's pid namespace. The locks API will
+ * translate it into the caller's pid namespace.
*/
rcu_read_lock();
- fl->fl_pid = pid_vnr(find_pid_ns(ffl->pid, fc->pid_ns));
+ fl->fl_pid = pid_nr_ns(find_pid_ns(ffl->pid, fc->pid_ns), &init_pid_ns);
rcu_read_unlock();
break;
diff --git a/fs/locks.c b/fs/locks.c
index d7daa6c8932f..6d0949880ebd 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -137,6 +137,7 @@
#define IS_FLOCK(fl) (fl->fl_flags & FL_FLOCK)
#define IS_LEASE(fl) (fl->fl_flags & (FL_LEASE|FL_DELEG|FL_LAYOUT))
#define IS_OFDLCK(fl) (fl->fl_flags & FL_OFDLCK)
+#define IS_REMOTELCK(fl) (fl->fl_pid <= 0)
static inline bool is_remote_lock(struct file *filp)
{
@@ -733,7 +734,6 @@ static void locks_wake_up_blocks(struct file_lock *blocker)
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);
}
@@ -743,10 +743,6 @@ locks_unlink_lock_ctx(struct file_lock *fl)
{
locks_delete_global_locks(fl);
list_del_init(&fl->fl_list);
- if (fl->fl_nspid) {
- put_pid(fl->fl_nspid);
- fl->fl_nspid = NULL;
- }
locks_wake_up_blocks(fl);
}
@@ -823,8 +819,6 @@ posix_test_lock(struct file *filp, struct file_lock *fl)
list_for_each_entry(cfl, &ctx->flc_posix, fl_list) {
if (posix_locks_conflict(fl, cfl)) {
locks_copy_conflock(fl, cfl);
- if (cfl->fl_nspid)
- fl->fl_pid = pid_vnr(cfl->fl_nspid);
goto out;
}
}
@@ -2048,9 +2042,33 @@ int vfs_test_lock(struct file *filp, struct file_lock *fl)
}
EXPORT_SYMBOL_GPL(vfs_test_lock);
+/**
+ * locks_translate_pid - translate a file_lock's fl_pid number into a namespace
+ * @fl: The file_lock who's fl_pid should be translated
+ * @ns: The namespace into which the pid should be translated
+ *
+ * Used to tranlate a fl_pid into a namespace virtual pid number
+ */
+static pid_t locks_translate_pid(struct file_lock *fl, struct pid_namespace *ns)
+{
+ pid_t vnr;
+ struct pid *pid;
+
+ if (IS_OFDLCK(fl))
+ return -1;
+ if (IS_REMOTELCK(fl))
+ return fl->fl_pid;
+
+ rcu_read_lock();
+ pid = find_pid_ns(fl->fl_pid, &init_pid_ns);
+ vnr = pid_nr_ns(pid, ns);
+ rcu_read_unlock();
+ return vnr;
+}
+
static int posix_lock_to_flock(struct flock *flock, struct file_lock *fl)
{
- flock->l_pid = IS_OFDLCK(fl) ? -1 : fl->fl_pid;
+ flock->l_pid = locks_translate_pid(fl, task_active_pid_ns(current));
#if BITS_PER_LONG == 32
/*
* Make sure we can represent the posix lock via
@@ -2072,7 +2090,7 @@ static int posix_lock_to_flock(struct flock *flock, struct file_lock *fl)
#if BITS_PER_LONG == 32
static void posix_lock_to_flock64(struct flock64 *flock, struct file_lock *fl)
{
- flock->l_pid = IS_OFDLCK(fl) ? -1 : fl->fl_pid;
+ flock->l_pid = locks_translate_pid(fl, task_active_pid_ns(current));
flock->l_start = fl->fl_start;
flock->l_len = fl->fl_end == OFFSET_MAX ? 0 :
fl->fl_end - fl->fl_start + 1;
@@ -2584,22 +2602,16 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl,
{
struct inode *inode = NULL;
unsigned int fl_pid;
+ struct pid_namespace *proc_pidns = file_inode(f->file)->i_sb->s_fs_info;
- if (fl->fl_nspid) {
- struct pid_namespace *proc_pidns = file_inode(f->file)->i_sb->s_fs_info;
-
- /* Don't let fl_pid change based on who is reading the file */
- fl_pid = pid_nr_ns(fl->fl_nspid, proc_pidns);
-
- /*
- * If there isn't a fl_pid don't display who is waiting on
- * the lock if we are called from locks_show, or if we are
- * called from __show_fd_info - skip lock entirely
- */
- if (fl_pid == 0)
- return;
- } else
- fl_pid = fl->fl_pid;
+ fl_pid = locks_translate_pid(fl, proc_pidns);
+ /*
+ * If there isn't a fl_pid don't display who is waiting on
+ * the lock if we are called from locks_show, or if we are
+ * called from __show_fd_info - skip lock entirely
+ */
+ if (fl_pid == 0)
+ return;
if (fl->fl_file != NULL)
inode = locks_inode(fl->fl_file);
@@ -2674,7 +2686,7 @@ static int locks_show(struct seq_file *f, void *v)
fl = hlist_entry(v, struct file_lock, fl_link);
- if (fl->fl_nspid && !pid_nr_ns(fl->fl_nspid, proc_pidns))
+ if (locks_translate_pid(fl, proc_pidns) == 0)
return 0;
lock_get_status(f, fl, iter->li_pos, "");
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 7b5d6816542b..f0b108af9b02 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -999,7 +999,6 @@ struct file_lock {
unsigned char fl_type;
unsigned int fl_pid;
int fl_link_cpu; /* what cpu's list is this on? */
- struct pid *fl_nspid;
wait_queue_head_t fl_wait;
struct file *fl_file;
loff_t fl_start;
generated by cgit (git 2.34.1) at 2024-05-28 01:49:06 +0000