[PATCH 2/8] fuse: Export IO helpers

Richard Weinberger
2021-01-24T23:22:20Z

MUSE will use this functions in its IO path,
so export them.

Signed-off-by: Richard Weinberger <richard@nod.at>
---
fs/fuse/file.c | 16 +++-------------
fs/fuse/fuse_i.h | 16 ++++++++++++++++
2 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 8cccecb55fb8..d41660b7f5bc 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -20,8 +20,8 @@
#include <linux/uio.h>
#include <linux/fs.h>

-static struct page **fuse_pages_alloc(unsigned int npages, gfp_t flags,
- struct fuse_page_desc **desc)
+struct page **fuse_pages_alloc(unsigned int npages, gfp_t flags,
+ struct fuse_page_desc **desc)
{
struct page **pages;

@@ -31,6 +31,7 @@ static struct page **fuse_pages_alloc(unsigned int npages, gfp_t flags,

return pages;
}
+EXPORT_SYMBOL_GPL(fuse_pages_alloc);

static int fuse_send_open(struct fuse_mount *fm, u64 nodeid, struct file *file,
int opcode, struct fuse_open_out *outargp)
@@ -1356,17 +1357,6 @@ static inline void fuse_page_descs_length_init(struct fuse_page_desc *descs,
descs[i].length = PAGE_SIZE - descs[i].offset;
}

-static inline unsigned long fuse_get_user_addr(const struct iov_iter *ii)
-{
- return (unsigned long)ii->iov->iov_base + ii->iov_offset;
-}
-
-static inline size_t fuse_get_frag_size(const struct iov_iter *ii,
- size_t max_size)
-{
- return min(iov_iter_single_seg_count(ii), max_size);
-}
-
static int fuse_get_user_pages(struct fuse_args_pages *ap, struct iov_iter *ii,
size_t *nbytesp, int write,
unsigned int max_pages)
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 7c4b8cb93f9f..8c56a3fd2c4e 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -31,6 +31,7 @@
#include <linux/pid_namespace.h>
#include <linux/refcount.h>
#include <linux/user_namespace.h>
+#include <linux/uio.h>

/** Default max number of pages that can be used in a single read request */
#define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
@@ -871,6 +872,17 @@ static inline bool fuse_is_bad(struct inode *inode)
return unlikely(test_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state));
}

+static inline unsigned long fuse_get_user_addr(const struct iov_iter *ii)
+{
+ return (unsigned long)ii->iov->iov_base + ii->iov_offset;
+}
+
+static inline size_t fuse_get_frag_size(const struct iov_iter *ii,
+ size_t max_size)
+{
+ return min(iov_iter_single_seg_count(ii), max_size);
+}
+
/** Device operations */
extern const struct file_operations fuse_dev_operations;

@@ -1213,4 +1225,8 @@ void fuse_dax_inode_cleanup(struct inode *inode);
bool fuse_dax_check_alignment(struct fuse_conn *fc, unsigned int map_alignment);
void fuse_dax_cancel_work(struct fuse_conn *fc);

+/* file.c */
+struct page **fuse_pages_alloc(unsigned int npages, gfp_t flags,
+ struct fuse_page_desc **desc);
+
#endif /* _FS_FUSE_I_H */
--
2.26.2