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authorBenjamin Coddington <bcodding@redhat.com>2017-07-21 13:36:25 -0400
committerJeff Layton <jlayton@redhat.com>2017-07-21 13:57:31 -0400
commit3953704fde7ec47f452ce6446fb7a0d5dc2f74df (patch)
tree8d7594335a5942ef8b280e14cafa5a999aa3fab8 /fs/locks.c
parent9d5b86ac13c573795525ecac6ed2db39ab23e2a8 (diff)
downloadlinux-3953704fde7ec47f452ce6446fb7a0d5dc2f74df.tar.bz2
locks: restore a warn for leaked locks on close
When locks.c moved to using file_lock_context, the check for any locks that were not released was moved from the __fput() to destroy_inode() path in commit 8634b51f6ca2 ("locks: convert lease handling to file_lock_context"). This warning has been quite useful for catching bugs, particularly in NFS where lock handling still sees some churn. Let's bring back the warning for leaked locks on __fput, as this warning is much more likely to be seen and reported by users. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com>
Diffstat (limited to 'fs/locks.c')
-rw-r--r--fs/locks.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/locks.c b/fs/locks.c
index 6d0949880ebd..1bd71c4d663a 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -271,6 +271,22 @@ locks_check_ctx_lists(struct inode *inode)
}
}
+static void
+locks_check_ctx_file_list(struct file *filp, struct list_head *list,
+ char *list_type)
+{
+ struct file_lock *fl;
+ struct inode *inode = locks_inode(filp);
+
+ list_for_each_entry(fl, list, fl_list)
+ if (fl->fl_file == filp)
+ pr_warn("Leaked %s lock on dev=0x%x:0x%x ino=0x%lx "
+ " fl_owner=%p fl_flags=0x%x fl_type=0x%x fl_pid=%u\n",
+ list_type, MAJOR(inode->i_sb->s_dev),
+ MINOR(inode->i_sb->s_dev), inode->i_ino,
+ fl->fl_owner, fl->fl_flags, fl->fl_type, fl->fl_pid);
+}
+
void
locks_free_lock_context(struct inode *inode)
{
@@ -2549,6 +2565,12 @@ void locks_remove_file(struct file *filp)
/* remove any leases */
locks_remove_lease(filp, ctx);
+
+ spin_lock(&ctx->flc_lock);
+ locks_check_ctx_file_list(filp, &ctx->flc_posix, "POSIX");
+ locks_check_ctx_file_list(filp, &ctx->flc_flock, "FLOCK");
+ locks_check_ctx_file_list(filp, &ctx->flc_lease, "LEASE");
+ spin_unlock(&ctx->flc_lock);
}
/**