ioend->io_append_trans = tp;
+ /*
+ * We will pass freeze protection with a transaction. So tell lockdep
+ * we released it.
+ */
+ rwsem_release(&ioend->io_inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1],
+ 1, _THIS_IP_);
/*
* We hand off the transaction to the completion thread now, so
* clear the flag here.
if (atomic_dec_and_test(&ioend->io_remaining)) {
struct xfs_mount *mp = XFS_I(ioend->io_inode)->i_mount;
- if (ioend->io_type == IO_UNWRITTEN)
+ if (ioend->io_type == XFS_IO_UNWRITTEN)
queue_work(mp->m_unwritten_workqueue, &ioend->io_work);
else if (ioend->io_append_trans)
queue_work(mp->m_data_workqueue, &ioend->io_work);
struct xfs_inode *ip = XFS_I(ioend->io_inode);
int error = 0;
+ if (ioend->io_append_trans) {
+ /*
+ * We've got freeze protection passed with the transaction.
+ * Tell lockdep about it.
+ */
+ rwsem_acquire_read(
+ &ioend->io_inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1],
+ 0, 1, _THIS_IP_);
+ }
if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
ioend->io_error = -EIO;
goto done;
* For unwritten extents we need to issue transactions to convert a
* range to normal written extens after the data I/O has finished.
*/
- if (ioend->io_type == IO_UNWRITTEN) {
+ if (ioend->io_type == XFS_IO_UNWRITTEN) {
/*
* For buffered I/O we never preallocate a transaction when
* doing the unwritten extent conversion, but for direct I/O
if (XFS_FORCED_SHUTDOWN(mp))
return -XFS_ERROR(EIO);
- if (type == IO_UNWRITTEN)
+ if (type == XFS_IO_UNWRITTEN)
bmapi_flags |= XFS_BMAPI_IGSTATE;
if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE ||
(ip->i_df.if_flags & XFS_IFEXTENTS));
- ASSERT(offset <= mp->m_maxioffset);
+ ASSERT(offset <= mp->m_super->s_maxbytes);
- if (offset + count > mp->m_maxioffset)
- count = mp->m_maxioffset - offset;
+ if (offset + count > mp->m_super->s_maxbytes)
+ count = mp->m_super->s_maxbytes - offset;
end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count);
offset_fsb = XFS_B_TO_FSBT(mp, offset);
error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb,
if (error)
return -XFS_ERROR(error);
- if (type == IO_DELALLOC &&
+ if (type == XFS_IO_DELALLOC &&
(!nimaps || isnullstartblock(imap->br_startblock))) {
error = xfs_iomap_write_allocate(ip, offset, count, imap);
if (!error)
}
#ifdef DEBUG
- if (type == IO_UNWRITTEN) {
+ if (type == XFS_IO_UNWRITTEN) {
ASSERT(nimaps);
ASSERT(imap->br_startblock != HOLESTARTBLOCK);
ASSERT(imap->br_startblock != DELAYSTARTBLOCK);
bh = head = page_buffers(page);
do {
if (buffer_unwritten(bh))
- acceptable += (type == IO_UNWRITTEN);
+ acceptable += (type == XFS_IO_UNWRITTEN);
else if (buffer_delay(bh))
- acceptable += (type == IO_DELALLOC);
+ acceptable += (type == XFS_IO_DELALLOC);
else if (buffer_dirty(bh) && buffer_mapped(bh))
- acceptable += (type == IO_OVERWRITE);
+ acceptable += (type == XFS_IO_OVERWRITE);
else
break;
} while ((bh = bh->b_this_page) != head);
if (buffer_unwritten(bh) || buffer_delay(bh) ||
buffer_mapped(bh)) {
if (buffer_unwritten(bh))
- type = IO_UNWRITTEN;
+ type = XFS_IO_UNWRITTEN;
else if (buffer_delay(bh))
- type = IO_DELALLOC;
+ type = XFS_IO_DELALLOC;
else
- type = IO_OVERWRITE;
+ type = XFS_IO_OVERWRITE;
if (!xfs_imap_valid(inode, imap, offset)) {
done = 1;
}
lock_buffer(bh);
- if (type != IO_OVERWRITE)
+ if (type != XFS_IO_OVERWRITE)
xfs_map_at_offset(inode, bh, imap, offset);
xfs_add_to_ioend(inode, bh, offset, type,
ioendp, done);
struct buffer_head *bh, *head;
loff_t offset = page_offset(page);
- if (!xfs_check_page_type(page, IO_DELALLOC))
+ if (!xfs_check_page_type(page, XFS_IO_DELALLOC))
goto out_invalidate;
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
end_index = offset >> PAGE_CACHE_SHIFT;
last_index = (offset - 1) >> PAGE_CACHE_SHIFT;
if (page->index >= end_index) {
- if ((page->index >= end_index + 1) ||
- !(i_size_read(inode) & (PAGE_CACHE_SIZE - 1))) {
+ unsigned offset_into_page = offset & (PAGE_CACHE_SIZE - 1);
+
+ /*
+ * Just skip the page if it is fully outside i_size, e.g. due
+ * to a truncate operation that is in progress.
+ */
+ if (page->index >= end_index + 1 || offset_into_page == 0) {
unlock_page(page);
return 0;
}
+
+ /*
+ * The page straddles i_size. It must be zeroed out on each
+ * and every writepage invocation because it may be mmapped.
+ * "A file is mapped in multiples of the page size. For a file
+ * that is not a multiple of the page size, the remaining
+ * memory is zeroed when mapped, and writes to that region are
+ * not written out to the file."
+ */
+ zero_user_segment(page, offset_into_page, PAGE_CACHE_SIZE);
}
end_offset = min_t(unsigned long long,
bh = head = page_buffers(page);
offset = page_offset(page);
- type = IO_OVERWRITE;
+ type = XFS_IO_OVERWRITE;
if (wbc->sync_mode == WB_SYNC_NONE)
nonblocking = 1;
}
if (buffer_unwritten(bh)) {
- if (type != IO_UNWRITTEN) {
- type = IO_UNWRITTEN;
+ if (type != XFS_IO_UNWRITTEN) {
+ type = XFS_IO_UNWRITTEN;
imap_valid = 0;
}
} else if (buffer_delay(bh)) {
- if (type != IO_DELALLOC) {
- type = IO_DELALLOC;
+ if (type != XFS_IO_DELALLOC) {
+ type = XFS_IO_DELALLOC;
imap_valid = 0;
}
} else if (buffer_uptodate(bh)) {
- if (type != IO_OVERWRITE) {
- type = IO_OVERWRITE;
+ if (type != XFS_IO_OVERWRITE) {
+ type = XFS_IO_OVERWRITE;
imap_valid = 0;
}
} else {
}
if (imap_valid) {
lock_buffer(bh);
- if (type != IO_OVERWRITE)
+ if (type != XFS_IO_OVERWRITE)
xfs_map_at_offset(inode, bh, &imap, offset);
xfs_add_to_ioend(inode, bh, offset, type, &ioend,
new_ioend);
* Reserve log space if we might write beyond the on-disk
* inode size.
*/
- if (ioend->io_type != IO_UNWRITTEN &&
+ if (ioend->io_type != XFS_IO_UNWRITTEN &&
xfs_ioend_is_append(ioend)) {
err = xfs_setfilesize_trans_alloc(ioend);
if (err)
lockmode = xfs_ilock_map_shared(ip);
}
- ASSERT(offset <= mp->m_maxioffset);
- if (offset + size > mp->m_maxioffset)
- size = mp->m_maxioffset - offset;
+ ASSERT(offset <= mp->m_super->s_maxbytes);
+ if (offset + size > mp->m_super->s_maxbytes)
+ size = mp->m_super->s_maxbytes - offset;
end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + size);
offset_fsb = XFS_B_TO_FSBT(mp, offset);
ioend->io_iocb = iocb;
ioend->io_result = ret;
if (private && size > 0)
- ioend->io_type = IO_UNWRITTEN;
+ ioend->io_type = XFS_IO_UNWRITTEN;
if (is_async) {
ioend->io_isasync = 1;
* and converts at least on unwritten extent we will cancel
* the still clean transaction after the I/O has finished.
*/
- iocb->private = ioend = xfs_alloc_ioend(inode, IO_DIRECT);
+ iocb->private = ioend = xfs_alloc_ioend(inode, XFS_IO_DIRECT);
if (offset + size > XFS_I(inode)->i_d.di_size) {
ret = xfs_setfilesize_trans_alloc(ioend);
if (ret)
if (ioend->io_append_trans) {
current_set_flags_nested(&ioend->io_append_trans->t_pflags,
PF_FSTRANS);
+ rwsem_acquire_read(
+ &inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1],
+ 0, 1, _THIS_IP_);
xfs_trans_cancel(ioend->io_append_trans, 0);
}
out_destroy_ioend:
projects / karo-tx-linux.git / blobdiff