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switch generic_write_checks() to iocb and iter

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... returning -E... upon error and amount of data left in iter after
(possible) truncation upon success.  Note, that normal case gives
a non-zero (positive) return value, so any tests for != 0 _must_ be
updated.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Conflicts:
	fs/ext4/file.c
This commit is contained in:
Al Viro
2015-04-09 12:55:47 -04:00
parent 90320251db
commit 3309dd04cb
14 changed files with 100 additions and 167 deletions
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10
fs/udf/file.c
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@@ -120,21 +120,15 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
ssize_t retval;
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
size_t count = iov_iter_count(from);
struct udf_inode_info *iinfo = UDF_I(inode);
int err;
mutex_lock(&inode->i_mutex);
retval = generic_write_checks(file, &iocb->ki_pos, &count);
if (retval)
retval = generic_write_checks(iocb, from);
if (retval <= 0)
goto out;
if (count == 0)
goto out;
iov_iter_truncate(from, count);
down_write(&iinfo->i_data_sem);
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
loff_t end = iocb->ki_pos + iov_iter_count(from);