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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 10:30:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 10:30:18 -0700
commit16b9057804c02e2d351e9c8f606e909b43cbd9e7 (patch)
treea3ac6e1d9d57a8abf4267e5ead3f2de1309335eb /include
parent5c02c392cd2320e8d612376d6b72b6548a680923 (diff)
parentc2338f2dc7c1e9f6202f370c64ffd7f44f3d4b51 (diff)
downloadlinux-16b9057804c02e2d351e9c8f606e909b43cbd9e7.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro: "This the bunch that sat in -next + lock_parent() fix. This is the minimal set; there's more pending stuff. In particular, I really hope to get acct.c fixes merged this cycle - we need that to deal sanely with delayed-mntput stuff. In the next pile, hopefully - that series is fairly short and localized (kernel/acct.c, fs/super.c and fs/namespace.c). In this pile: more iov_iter work. Most of prereqs for ->splice_write with sane locking order are there and Kent's dio rewrite would also fit nicely on top of this pile" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits) lock_parent: don't step on stale ->d_parent of all-but-freed one kill generic_file_splice_write() ceph: switch to iter_file_splice_write() shmem: switch to iter_file_splice_write() nfs: switch to iter_splice_write_file() fs/splice.c: remove unneeded exports ocfs2: switch to iter_file_splice_write() ->splice_write() via ->write_iter() bio_vec-backed iov_iter optimize copy_page_{to,from}_iter() bury generic_file_aio_{read,write} lustre: get rid of messing with iovecs ceph: switch to ->write_iter() ceph_sync_direct_write: stop poking into iov_iter guts ceph_sync_read: stop poking into iov_iter guts new helper: copy_page_from_iter() fuse: switch to ->write_iter() btrfs: switch to ->write_iter() ocfs2: switch to ->write_iter() xfs: switch to ->write_iter() ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/blk_types.h4
-rw-r--r--include/linux/ceph/libceph.h2
-rw-r--r--include/linux/fs.h41
-rw-r--r--include/linux/nfs_fs.h7
-rw-r--r--include/linux/splice.h10
-rw-r--r--include/linux/uio.h51
6 files changed, 65 insertions, 50 deletions
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index d8e4cea23a25..66c2167f04a9 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -5,8 +5,6 @@
#ifndef __LINUX_BLK_TYPES_H
#define __LINUX_BLK_TYPES_H
-#ifdef CONFIG_BLOCK
-
#include <linux/types.h>
struct bio_set;
@@ -28,6 +26,8 @@ struct bio_vec {
unsigned int bv_offset;
};
+#ifdef CONFIG_BLOCK
+
struct bvec_iter {
sector_t bi_sector; /* device address in 512 byte
sectors */
diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h
index 2f49aa4c4f7f..279b0afac1c1 100644
--- a/include/linux/ceph/libceph.h
+++ b/include/linux/ceph/libceph.h
@@ -222,8 +222,6 @@ extern void ceph_copy_to_page_vector(struct page **pages,
extern void ceph_copy_from_page_vector(struct page **pages,
void *data,
loff_t off, size_t len);
-extern int ceph_copy_page_vector_to_user(struct page **pages, void __user *data,
- loff_t off, size_t len);
extern void ceph_zero_page_vector_range(int off, int len, struct page **pages);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c3f46e499dd0..338e6f758c6d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -128,6 +128,10 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
#define FMODE_ATOMIC_POS ((__force fmode_t)0x8000)
/* Write access to underlying fs */
#define FMODE_WRITER ((__force fmode_t)0x10000)
+/* Has read method(s) */
+#define FMODE_CAN_READ ((__force fmode_t)0x20000)
+/* Has write method(s) */
+#define FMODE_CAN_WRITE ((__force fmode_t)0x40000)
/* File was opened by fanotify and shouldn't generate fanotify events */
#define FMODE_NONOTIFY ((__force fmode_t)0x1000000)
@@ -343,8 +347,7 @@ struct address_space_operations {
void (*invalidatepage) (struct page *, unsigned int, unsigned int);
int (*releasepage) (struct page *, gfp_t);
void (*freepage)(struct page *);
- ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs);
+ ssize_t (*direct_IO)(int, struct kiocb *, struct iov_iter *iter, loff_t offset);
int (*get_xip_mem)(struct address_space *, pgoff_t, int,
void **, unsigned long *);
/*
@@ -1448,6 +1451,8 @@ struct block_device_operations;
#define HAVE_COMPAT_IOCTL 1
#define HAVE_UNLOCKED_IOCTL 1
+struct iov_iter;
+
struct file_operations {
struct module *owner;
loff_t (*llseek) (struct file *, loff_t, int);
@@ -1455,6 +1460,8 @@ struct file_operations {
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
ssize_t (*aio_read) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
+ ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);
+ ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
int (*iterate) (struct file *, struct dir_context *);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
@@ -2404,20 +2411,18 @@ extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
extern int generic_file_remap_pages(struct vm_area_struct *, unsigned long addr,
unsigned long size, pgoff_t pgoff);
int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk);
-extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
-extern ssize_t __generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long);
-extern ssize_t generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
-extern ssize_t generic_file_direct_write(struct kiocb *, const struct iovec *,
- unsigned long *, loff_t, size_t, size_t);
+extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *);
+extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *);
+extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);
+extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *, loff_t);
extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t);
extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
-extern int generic_segment_checks(const struct iovec *iov,
- unsigned long *nr_segs, size_t *count, int access_flags);
+extern ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
+extern ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
/* fs/block_dev.c */
-extern ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos);
+extern ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from);
extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
int datasync);
extern void block_sync_page(struct page *page);
@@ -2427,7 +2432,7 @@ extern ssize_t generic_file_splice_read(struct file *, loff_t *,
struct pipe_inode_info *, size_t, unsigned int);
extern ssize_t default_file_splice_read(struct file *, loff_t *,
struct pipe_inode_info *, size_t, unsigned int);
-extern ssize_t generic_file_splice_write(struct pipe_inode_info *,
+extern ssize_t iter_file_splice_write(struct pipe_inode_info *,
struct file *, loff_t *, size_t, unsigned int);
extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
struct file *out, loff_t *, size_t len, unsigned int flags);
@@ -2477,16 +2482,16 @@ enum {
void dio_end_io(struct bio *bio, int error);
ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
- struct block_device *bdev, const struct iovec *iov, loff_t offset,
- unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
+ struct block_device *bdev, struct iov_iter *iter, loff_t offset,
+ get_block_t get_block, dio_iodone_t end_io,
dio_submit_t submit_io, int flags);
static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
- struct inode *inode, const struct iovec *iov, loff_t offset,
- unsigned long nr_segs, get_block_t get_block)
+ struct inode *inode, struct iov_iter *iter, loff_t offset,
+ get_block_t get_block)
{
- return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, get_block, NULL, NULL,
+ return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iter,
+ offset, get_block, NULL, NULL,
DIO_LOCKING | DIO_SKIP_HOLES);
}
#endif
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 919576b8e2cf..e30f6059ecd6 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -459,13 +459,12 @@ extern int nfs3_removexattr (struct dentry *, const char *name);
/*
* linux/fs/nfs/direct.c
*/
-extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
- unsigned long);
+extern ssize_t nfs_direct_IO(int, struct kiocb *, struct iov_iter *, loff_t);
extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
- const struct iovec *iov, unsigned long nr_segs,
+ struct iov_iter *iter,
loff_t pos, bool uio);
extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
- const struct iovec *iov, unsigned long nr_segs,
+ struct iov_iter *iter,
loff_t pos, bool uio);
/*
diff --git a/include/linux/splice.h b/include/linux/splice.h
index 0e43906d2fda..da2751d3b93d 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
@@ -70,16 +70,6 @@ extern ssize_t splice_from_pipe(struct pipe_inode_info *, struct file *,
splice_actor *);
extern ssize_t __splice_from_pipe(struct pipe_inode_info *,
struct splice_desc *, splice_actor *);
-extern int splice_from_pipe_feed(struct pipe_inode_info *, struct splice_desc *,
- splice_actor *);
-extern int splice_from_pipe_next(struct pipe_inode_info *,
- struct splice_desc *);
-extern void splice_from_pipe_begin(struct splice_desc *);
-extern void splice_from_pipe_end(struct pipe_inode_info *,
- struct splice_desc *);
-extern int pipe_to_file(struct pipe_inode_info *, struct pipe_buffer *,
- struct splice_desc *);
-
extern ssize_t splice_to_pipe(struct pipe_inode_info *,
struct splice_pipe_desc *);
extern ssize_t splice_direct_to_actor(struct file *, struct splice_desc *,
diff --git a/include/linux/uio.h b/include/linux/uio.h
index 199bcc34241b..e2231e47cec1 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -19,11 +19,21 @@ struct kvec {
size_t iov_len;
};
+enum {
+ ITER_IOVEC = 0,
+ ITER_KVEC = 2,
+ ITER_BVEC = 4,
+};
+
struct iov_iter {
- const struct iovec *iov;
- unsigned long nr_segs;
+ int type;
size_t iov_offset;
size_t count;
+ union {
+ const struct iovec *iov;
+ const struct bio_vec *bvec;
+ };
+ unsigned long nr_segs;
};
/*
@@ -53,6 +63,7 @@ static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
}
#define iov_for_each(iov, iter, start) \
+ if (!((start).type & ITER_BVEC)) \
for (iter = (start); \
(iter).count && \
((iov = iov_iter_iovec(&(iter))), 1); \
@@ -62,32 +73,44 @@ unsigned long iov_shorten(struct iovec *iov, unsigned long nr_segs, size_t to);
size_t iov_iter_copy_from_user_atomic(struct page *page,
struct iov_iter *i, unsigned long offset, size_t bytes);
-size_t iov_iter_copy_from_user(struct page *page,
- struct iov_iter *i, unsigned long offset, size_t bytes);
void iov_iter_advance(struct iov_iter *i, size_t bytes);
int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes);
size_t iov_iter_single_seg_count(const struct iov_iter *i);
size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes,
struct iov_iter *i);
+size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes,
+ struct iov_iter *i);
+unsigned long iov_iter_alignment(const struct iov_iter *i);
+void iov_iter_init(struct iov_iter *i, int direction, const struct iovec *iov,
+ unsigned long nr_segs, size_t count);
+ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages,
+ size_t maxsize, size_t *start);
+ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, struct page ***pages,
+ size_t maxsize, size_t *start);
+int iov_iter_npages(const struct iov_iter *i, int maxpages);
-static inline void iov_iter_init(struct iov_iter *i,
- const struct iovec *iov, unsigned long nr_segs,
- size_t count, size_t written)
+static inline size_t iov_iter_count(struct iov_iter *i)
{
- i->iov = iov;
- i->nr_segs = nr_segs;
- i->iov_offset = 0;
- i->count = count + written;
+ return i->count;
+}
- iov_iter_advance(i, written);
+static inline void iov_iter_truncate(struct iov_iter *i, size_t count)
+{
+ if (i->count > count)
+ i->count = count;
}
-static inline size_t iov_iter_count(struct iov_iter *i)
+/*
+ * reexpand a previously truncated iterator; count must be no more than how much
+ * we had shrunk it.
+ */
+static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
{
- return i->count;
+ i->count = count;
}
int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len);
+
#endif