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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-09 12:55:47 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-11 22:30:21 -0400 |
| commit | 3309dd04cbcd2cdad168485af5cf3576b5051e49 (patch) | |
| tree | 3e01f865306dee01b31f34c9e7e819a5f42a4087 /fs/9p | |
| parent | 90320251db0fe3d05f2b10686ec936c7d6ecd99a (diff) | |
| download | linux-3309dd04cbcd2cdad168485af5cf3576b5051e49.tar.gz | |
switch generic_write_checks() to iocb and iter
... 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
Diffstat (limited to 'fs/9p')
| -rw-r--r-- | fs/9p/vfs_file.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index b5b020ace1b3..2a9dd37dc426 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -404,21 +404,16 @@ static ssize_t v9fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) { struct file *file = iocb->ki_filp; - ssize_t retval = 0; - loff_t origin = iocb->ki_pos; - size_t count = iov_iter_count(from); + ssize_t retval; + loff_t origin; int err = 0; - retval = generic_write_checks(file, &origin, &count); - if (retval) + retval = generic_write_checks(iocb, from); + if (retval <= 0) return retval; - iov_iter_truncate(from, count); - - if (!count) - return 0; - - retval = p9_client_write(file->private_data, origin, from, &err); + origin = iocb->ki_pos; + retval = p9_client_write(file->private_data, iocb->ki_pos, from, &err); if (retval > 0) { struct inode *inode = file_inode(file); loff_t i_size; @@ -428,12 +423,11 @@ v9fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) if (inode->i_mapping && inode->i_mapping->nrpages) invalidate_inode_pages2_range(inode->i_mapping, pg_start, pg_end); - origin += retval; + iocb->ki_pos += retval; i_size = i_size_read(inode); - iocb->ki_pos = origin; - if (origin > i_size) { - inode_add_bytes(inode, origin - i_size); - i_size_write(inode, origin); + if (iocb->ki_pos > i_size) { + inode_add_bytes(inode, iocb->ki_pos - i_size); + i_size_write(inode, iocb->ki_pos); } return retval; } |