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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Browse source 
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()
  ...
This commit is contained in:
Linus Torvalds 2014-06-12 10:30:18 -07:00
commit 16b9057804
102 changed files with 1796 additions and 2028 deletions
Download patch file Download diff file Expand all files Collapse all files

3
fs/ext4/ext4.h
View file

@ -2140,8 +2140,7 @@ extern void ext4_da_update_reserve_space(struct inode *inode,
extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map, int flags);
extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset,
unsigned long nr_segs);
struct iov_iter *iter, loff_t offset);
extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock);
extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks);
extern void ext4_ind_truncate(handle_t *, struct inode *inode);

35
fs/ext4/file.c
View file

@ -74,26 +74,22 @@ static void ext4_unwritten_wait(struct inode *inode)
* or one thread will zero the other's data, causing corruption.
*/
static int
ext4_unaligned_aio(struct inode *inode, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
ext4_unaligned_aio(struct inode *inode, struct iov_iter *from, loff_t pos)
{
struct super_block *sb = inode->i_sb;
int blockmask = sb->s_blocksize - 1;
size_t count = iov_length(iov, nr_segs);
loff_t final_size = pos + count;
if (pos >= i_size_read(inode))
return 0;
if ((pos & blockmask) || (final_size & blockmask))
if ((pos | iov_iter_alignment(from)) & blockmask)
return 1;
return 0;
}
static ssize_t
ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(iocb->ki_filp);
@ -101,10 +97,9 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
struct blk_plug plug;
int o_direct = file->f_flags & O_DIRECT;
int overwrite = 0;
size_t length = iov_length(iov, nr_segs);
size_t length = iov_iter_count(from);
ssize_t ret;
BUG_ON(iocb->ki_pos != pos);
loff_t pos = iocb->ki_pos;
/*
* Unaligned direct AIO must be serialized; see comment above
@ -114,7 +109,7 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS) &&
!is_sync_kiocb(iocb) &&
(file->f_flags & O_APPEND ||
ext4_unaligned_aio(inode, iov, nr_segs, pos))) {
ext4_unaligned_aio(inode, from, pos))) {
aio_mutex = ext4_aio_mutex(inode);
mutex_lock(aio_mutex);
ext4_unwritten_wait(inode);
@ -138,10 +133,8 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
goto errout;
}
if (pos + length > sbi->s_bitmap_maxbytes) {
nr_segs = iov_shorten((struct iovec *)iov, nr_segs,
sbi->s_bitmap_maxbytes - pos);
}
if (pos + length > sbi->s_bitmap_maxbytes)
iov_iter_truncate(from, sbi->s_bitmap_maxbytes - pos);
}
if (o_direct) {
@ -179,7 +172,7 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
}
}
ret = __generic_file_aio_write(iocb, iov, nr_segs);
ret = __generic_file_write_iter(iocb, from);
mutex_unlock(&inode->i_mutex);
if (ret > 0) {
@ -594,10 +587,10 @@ loff_t ext4_llseek(struct file *file, loff_t offset, int whence)
const struct file_operations ext4_file_operations = {
.llseek = ext4_llseek,
.read = do_sync_read,
.write = do_sync_write,
.aio_read = generic_file_aio_read,
.aio_write = ext4_file_write,
.read = new_sync_read,
.write = new_sync_write,
.read_iter = generic_file_read_iter,
.write_iter = ext4_file_write_iter,
.unlocked_ioctl = ext4_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ext4_compat_ioctl,
@ -607,7 +600,7 @@ const struct file_operations ext4_file_operations = {
.release = ext4_release_file,
.fsync = ext4_sync_file,
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
.splice_write = iter_file_splice_write,
.fallocate = ext4_fallocate,
};

14
fs/ext4/indirect.c
View file

@ -639,8 +639,7 @@ out:
* VFS code falls back into buffered path in that case so we are safe.
*/
ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset,
unsigned long nr_segs)
struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
@ -648,7 +647,7 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
handle_t *handle;
ssize_t ret;
int orphan = 0;
size_t count = iov_length(iov, nr_segs);
size_t count = iov_iter_count(iter);
int retries = 0;
if (rw == WRITE) {
@ -687,18 +686,17 @@ retry:
goto locked;
}
ret = __blockdev_direct_IO(rw, iocb, inode,
inode->i_sb->s_bdev, iov,
offset, nr_segs,
inode->i_sb->s_bdev, iter, offset,
ext4_get_block, NULL, NULL, 0);
inode_dio_done(inode);
} else {
locked:
ret = blockdev_direct_IO(rw, iocb, inode, iov,
offset, nr_segs, ext4_get_block);
ret = blockdev_direct_IO(rw, iocb, inode, iter,
offset, ext4_get_block);
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);
loff_t end = offset + iov_length(iov, nr_segs);
loff_t end = offset + count;
if (end > isize)
ext4_truncate_failed_write(inode);

24
fs/ext4/inode.c
View file

@ -3093,13 +3093,12 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
*
*/
static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset,
unsigned long nr_segs)
struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
size_t count = iov_length(iov, nr_segs);
size_t count = iov_iter_count(iter);
int overwrite = 0;
get_block_t *get_block_func = NULL;
int dio_flags = 0;
@ -3108,7 +3107,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
/* Use the old path for reads and writes beyond i_size. */
if (rw != WRITE || final_size > inode->i_size)
return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
return ext4_ind_direct_IO(rw, iocb, iter, offset);
BUG_ON(iocb->private == NULL);
@ -3175,8 +3174,8 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
dio_flags = DIO_LOCKING;
}
ret = __blockdev_direct_IO(rw, iocb, inode,
inode->i_sb->s_bdev, iov,
offset, nr_segs,
inode->i_sb->s_bdev, iter,
offset,
get_block_func,
ext4_end_io_dio,
NULL,
@ -3230,11 +3229,11 @@ retake_lock:
}
static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset,
unsigned long nr_segs)
struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
size_t count = iov_iter_count(iter);
ssize_t ret;
/*
@ -3247,13 +3246,12 @@ static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
if (ext4_has_inline_data(inode))
return 0;
trace_ext4_direct_IO_enter(inode, offset, iov_length(iov, nr_segs), rw);
trace_ext4_direct_IO_enter(inode, offset, count, rw);
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
ret = ext4_ext_direct_IO(rw, iocb, iov, offset, nr_segs);
ret = ext4_ext_direct_IO(rw, iocb, iter, offset);
else
ret = ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
trace_ext4_direct_IO_exit(inode, offset,
iov_length(iov, nr_segs), rw, ret);
ret = ext4_ind_direct_IO(rw, iocb, iter, offset);
trace_ext4_direct_IO_exit(inode, offset, count, rw, ret);
return ret;
}