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OpenCloudOS-Kernel
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xfs_file_aio_write_checks: switch to iocb/iov_iter 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-04-07 14:25:18 -04:00
parent 0fa6b005af
commit 99733fa372
1 changed files with 16 additions and 15 deletions
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31
fs/xfs/xfs_file.c
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@ -544,17 +544,18 @@ xfs_zero_eof(
*/
STATIC ssize_t
xfs_file_aio_write_checks(
struct file *file,
loff_t *pos,
size_t *count,
struct kiocb *iocb,
struct iov_iter *from,
int *iolock)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
struct xfs_inode *ip = XFS_I(inode);
int error = 0;
size_t count = iov_iter_count(from);
restart:
error = generic_write_checks(file, pos, count);
error = generic_write_checks(file, &iocb->ki_pos, &count);
if (error)
return error;
@ -569,7 +570,7 @@ restart:
* iolock shared, we need to update it to exclusive which implies
* having to redo all checks before.
*/
if (*pos > i_size_read(inode)) {
if (iocb->ki_pos > i_size_read(inode)) {
bool zero = false;
if (*iolock == XFS_IOLOCK_SHARED) {
@ -578,10 +579,11 @@ restart:
xfs_rw_ilock(ip, *iolock);
goto restart;
}
error = xfs_zero_eof(ip, *pos, i_size_read(inode), &zero);
error = xfs_zero_eof(ip, iocb->ki_pos, i_size_read(inode), &zero);
if (error)
return error;
}
iov_iter_truncate(from, count);
/*
* Updating the timestamps will grab the ilock again from
@ -678,10 +680,11 @@ xfs_file_dio_aio_write(
xfs_rw_ilock(ip, iolock);
}
ret = xfs_file_aio_write_checks(file, &pos, &count, &iolock);
ret = xfs_file_aio_write_checks(iocb, from, &iolock);
if (ret)
goto out;
iov_iter_truncate(from, count);
count = iov_iter_count(from);
pos = iocb->ki_pos;
if (mapping->nrpages) {
ret = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
@ -734,24 +737,22 @@ xfs_file_buffered_aio_write(
ssize_t ret;
int enospc = 0;
int iolock = XFS_IOLOCK_EXCL;
loff_t pos = iocb->ki_pos;
size_t count = iov_iter_count(from);
xfs_rw_ilock(ip, iolock);
ret = xfs_file_aio_write_checks(file, &pos, &count, &iolock);
ret = xfs_file_aio_write_checks(iocb, from, &iolock);
if (ret)
goto out;
iov_iter_truncate(from, count);
/* We can write back this queue in page reclaim */
current->backing_dev_info = inode_to_bdi(inode);
write_retry:
trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, 0);
ret = generic_perform_write(file, from, pos);
trace_xfs_file_buffered_write(ip, iov_iter_count(from),
iocb->ki_pos, 0);
ret = generic_perform_write(file, from, iocb->ki_pos);
if (likely(ret >= 0))
iocb->ki_pos = pos + ret;
iocb->ki_pos += ret;
/*
* If we hit a space limit, try to free up some lingering preallocated