diff options
Diffstat (limited to 'fs/fuse/fuse_i.h')
| -rw-r--r-- | fs/fuse/fuse_i.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 2d2bdd596194..32c935f1e1b0 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -149,6 +149,13 @@ struct fuse_inode { /** Lock to protect write related fields */ spinlock_t lock; + /** + * Can't take inode lock in fault path (leads to circular dependency). + * Introduce another semaphore which can be taken in fault path and + * then other filesystem paths can take this to block faults. + */ + struct rw_semaphore i_mmap_sem; + #ifdef CONFIG_FUSE_DAX /* * Dax specific inode data @@ -1116,6 +1123,7 @@ void fuse_free_conn(struct fuse_conn *fc); ssize_t fuse_dax_read_iter(struct kiocb *iocb, struct iov_iter *to); ssize_t fuse_dax_write_iter(struct kiocb *iocb, struct iov_iter *from); int fuse_dax_mmap(struct file *file, struct vm_area_struct *vma); +int fuse_dax_break_layouts(struct inode *inode, u64 dmap_start, u64 dmap_end); int fuse_dax_conn_alloc(struct fuse_conn *fc, struct dax_device *dax_dev); void fuse_dax_conn_free(struct fuse_conn *fc); bool fuse_dax_inode_alloc(struct super_block *sb, struct fuse_inode *fi); |