Merge branch 'fscache' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs into for-linus

12 files changed, 209 insertions, 124 deletions

diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index eb48f3816df9..bd2e52ccc4f2 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -156,7 +156,6 @@ static inline void get_dma_buf(struct dma_buf *dmabuf)
         get_file(dmabuf->file);
 }
 
-#ifdef CONFIG_DMA_SHARED_BUFFER
 struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
                                                         struct device *dev);
 void dma_buf_detach(struct dma_buf *dmabuf,
@@ -184,103 +183,5 @@ int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *,
                  unsigned long);
 void *dma_buf_vmap(struct dma_buf *);
 void dma_buf_vunmap(struct dma_buf *, void *vaddr);
-#else
-
-static inline struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
-                                                        struct device *dev)
-{
-        return ERR_PTR(-ENODEV);
-}
-
-static inline void dma_buf_detach(struct dma_buf *dmabuf,
-                                  struct dma_buf_attachment *dmabuf_attach)
-{
-        return;
-}
-
-static inline struct dma_buf *dma_buf_export(void *priv,
-                                             const struct dma_buf_ops *ops,
-                                             size_t size, int flags)
-{
-        return ERR_PTR(-ENODEV);
-}
-
-static inline int dma_buf_fd(struct dma_buf *dmabuf, int flags)
-{
-        return -ENODEV;
-}
-
-static inline struct dma_buf *dma_buf_get(int fd)
-{
-        return ERR_PTR(-ENODEV);
-}
-
-static inline void dma_buf_put(struct dma_buf *dmabuf)
-{
-        return;
-}
-
-static inline struct sg_table *dma_buf_map_attachment(
-        struct dma_buf_attachment *attach, enum dma_data_direction write)
-{
-        return ERR_PTR(-ENODEV);
-}
-
-static inline void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
-                        struct sg_table *sg, enum dma_data_direction dir)
-{
-        return;
-}
-
-static inline int dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
-                                           size_t start, size_t len,
-                                           enum dma_data_direction dir)
-{
-        return -ENODEV;
-}
-
-static inline void dma_buf_end_cpu_access(struct dma_buf *dmabuf,
-                                          size_t start, size_t len,
-                                          enum dma_data_direction dir)
-{
-}
-
-static inline void *dma_buf_kmap_atomic(struct dma_buf *dmabuf,
-                                        unsigned long pnum)
-{
-        return NULL;
-}
-
-static inline void dma_buf_kunmap_atomic(struct dma_buf *dmabuf,
-                                         unsigned long pnum, void *vaddr)
-{
-}
-
-static inline void *dma_buf_kmap(struct dma_buf *dmabuf, unsigned long pnum)
-{
-        return NULL;
-}
-
-static inline void dma_buf_kunmap(struct dma_buf *dmabuf,
-                                  unsigned long pnum, void *vaddr)
-{
-}
-
-static inline int dma_buf_mmap(struct dma_buf *dmabuf,
-                               struct vm_area_struct *vma,
-                               unsigned long pgoff)
-{
-        return -ENODEV;
-}
-
-static inline void *dma_buf_vmap(struct dma_buf *dmabuf)
-{
-        return NULL;
-}
-
-static inline void dma_buf_vunmap(struct dma_buf *dmabuf, void *vaddr)
-{
-}
-#endif /* CONFIG_DMA_SHARED_BUFFER */
 
 #endif /* __DMA_BUF_H__ */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 05cd238ad941..7617ee04f066 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1994,6 +1994,7 @@ struct filename {
         bool                    separate; /* should "name" be freed? */
 };
 
+extern long vfs_truncate(struct path *, loff_t);
 extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
                        struct file *filp);
 extern int do_fallocate(struct file *file, int mode, loff_t offset,
diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h
index ce31408b1e47..5dfa0aa216b6 100644
--- a/include/linux/fscache-cache.h
+++ b/include/linux/fscache-cache.h
@@ -75,6 +75,16 @@ extern wait_queue_head_t fscache_cache_cleared_wq;
 typedef void (*fscache_operation_release_t)(struct fscache_operation *op);
 typedef void (*fscache_operation_processor_t)(struct fscache_operation *op);
 
+enum fscache_operation_state {
+        FSCACHE_OP_ST_BLANK,            /* Op is not yet submitted */
+        FSCACHE_OP_ST_INITIALISED,      /* Op is initialised */
+        FSCACHE_OP_ST_PENDING,          /* Op is blocked from running */
+        FSCACHE_OP_ST_IN_PROGRESS,      /* Op is in progress */
+        FSCACHE_OP_ST_COMPLETE,         /* Op is complete */
+        FSCACHE_OP_ST_CANCELLED,        /* Op has been cancelled */
+        FSCACHE_OP_ST_DEAD              /* Op is now dead */
+};
+
 struct fscache_operation {
         struct work_struct      work;           /* record for async ops */
         struct list_head        pend_link;      /* link in object->pending_ops */
@@ -86,10 +96,10 @@ struct fscache_operation {
 #define FSCACHE_OP_MYTHREAD     0x0002  /* - processing is done be issuing thread, not pool */
 #define FSCACHE_OP_WAITING      4       /* cleared when op is woken */
 #define FSCACHE_OP_EXCLUSIVE    5       /* exclusive op, other ops must wait */
-#define FSCACHE_OP_DEAD         6       /* op is now dead */
-#define FSCACHE_OP_DEC_READ_CNT 7       /* decrement object->n_reads on destruction */
-#define FSCACHE_OP_KEEP_FLAGS   0xc0    /* flags to keep when repurposing an op */
+#define FSCACHE_OP_DEC_READ_CNT 6       /* decrement object->n_reads on destruction */
+#define FSCACHE_OP_KEEP_FLAGS   0x0070  /* flags to keep when repurposing an op */
 
+        enum fscache_operation_state state;
         atomic_t                usage;
         unsigned                debug_id;       /* debugging ID */
 
@@ -106,6 +116,7 @@ extern atomic_t fscache_op_debug_id;
 extern void fscache_op_work_func(struct work_struct *work);
 
 extern void fscache_enqueue_operation(struct fscache_operation *);
+extern void fscache_op_complete(struct fscache_operation *, bool);
 extern void fscache_put_operation(struct fscache_operation *);