*/
#include <linux/slab.h>
-#include <linux/writeback.h>
-#include <linux/buffer_head.h>
-#include <scsi/scsi_device.h>
#include "exofs.h"
unsigned nr_pages;
unsigned long length;
loff_t pg_first; /* keep 64bit also in 32-arches */
+ bool read_4_write; /* This means two things: that the read is sync
+ * And the pages should not be unlocked.
+ */
};
static void _pcol_init(struct page_collect *pcol, unsigned expected_pages,
pcol->nr_pages = 0;
pcol->length = 0;
pcol->pg_first = -1;
+ pcol->read_4_write = false;
}
static void _pcol_reset(struct page_collect *pcol)
if (PageError(page))
ClearPageError(page);
- unlock_page(page);
+ if (!pcol->read_4_write)
+ unlock_page(page);
EXOFS_DBGMSG("readpage_strip(0x%lx, 0x%lx) empty page,"
" splitting\n", inode->i_ino, page->index);
/* readpage_strip might call read_exec(,is_sync==false) at several
* places but not if we have a single page.
*/
+ pcol.read_4_write = is_sync;
ret = readpage_strip(&pcol, page);
if (ret) {
EXOFS_ERR("_readpage => %d\n", ret);
return write_exec(&pcol);
}
+/* i_mutex held using inode->i_size directly */
+static void _write_failed(struct inode *inode, loff_t to)
+{
+ if (to > inode->i_size)
+ truncate_pagecache(inode, to, inode->i_size);
+}
+
int exofs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
fsdata);
if (ret) {
EXOFS_DBGMSG("simple_write_begin faild\n");
- return ret;
+ goto out;
}
page = *pagep;
EXOFS_DBGMSG("__readpage_filler faild\n");
}
}
+out:
+ if (unlikely(ret))
+ _write_failed(mapping->host, pos + len);
return ret;
}
int ret;
ret = simple_write_end(file, mapping,pos, len, copied, page, fsdata);
+ if (unlikely(ret))
+ _write_failed(inode, pos + len);
+
+ /* TODO: once simple_write_end marks inode dirty remove */
if (i_size != inode->i_size)
mark_inode_dirty(inode);
return ret;
{
EXOFS_DBGMSG("page 0x%lx\n", page->index);
WARN_ON(1);
- return try_to_free_buffers(page);
+ return 0;
}
static void exofs_invalidatepage(struct page *page, unsigned long offset)
{
- EXOFS_DBGMSG("page_has_buffers=>%d\n", page_has_buffers(page));
+ EXOFS_DBGMSG("page 0x%lx offset 0x%lx\n", page->index, offset);
WARN_ON(1);
-
- block_invalidatepage(page, offset);
}
const struct address_space_operations exofs_aops = {
return S_ISLNK(inode->i_mode) && (oi->i_data[0] != 0);
}
-/*
- * get_block_t - Fill in a buffer_head
- * An OSD takes care of block allocation so we just fake an allocation by
- * putting in the inode's sector_t in the buffer_head.
- * TODO: What about the case of create==0 and @iblock does not exist in the
- * object?
- */
-static int exofs_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
-{
- map_bh(bh_result, inode->i_sb, iblock);
- return 0;
-}
-
const struct osd_attr g_attr_logical_length = ATTR_DEF(
OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8);
-static int _do_truncate(struct inode *inode)
+static int _do_truncate(struct inode *inode, loff_t newsize)
{
struct exofs_i_info *oi = exofs_i(inode);
- loff_t isize = i_size_read(inode);
int ret;
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
- nobh_truncate_page(inode->i_mapping, isize, exofs_get_block);
+ ret = exofs_oi_truncate(oi, (u64)newsize);
+ if (likely(!ret))
+ truncate_setsize(inode, newsize);
- ret = exofs_oi_truncate(oi, (u64)isize);
- EXOFS_DBGMSG("(0x%lx) size=0x%llx\n", inode->i_ino, isize);
+ EXOFS_DBGMSG("(0x%lx) size=0x%llx ret=>%d\n",
+ inode->i_ino, newsize, ret);
return ret;
}
/*
- * Truncate a file to the specified size - all we have to do is set the size
- * attribute. We make sure the object exists first.
- */
-void exofs_truncate(struct inode *inode)
-{
- struct exofs_i_info *oi = exofs_i(inode);
- int ret;
-
- if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
- || S_ISLNK(inode->i_mode)))
- return;
- if (exofs_inode_is_fast_symlink(inode))
- return;
- if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- return;
-
- /* if we are about to truncate an object, and it hasn't been
- * created yet, wait
- */
- if (unlikely(wait_obj_created(oi)))
- goto fail;
-
- ret = _do_truncate(inode);
- if (ret)
- goto fail;
-
-out:
- mark_inode_dirty(inode);
- return;
-fail:
- make_bad_inode(inode);
- goto out;
-}
-
-/*
- * Set inode attributes - just call generic functions.
+ * Set inode attributes - update size attribute on OSD if needed,
+ * otherwise just call generic functions.
*/
int exofs_setattr(struct dentry *dentry, struct iattr *iattr)
{
struct inode *inode = dentry->d_inode;
int error;
+ /* if we are about to modify an object, and it hasn't been
+ * created yet, wait
+ */
+ error = wait_obj_created(exofs_i(inode));
+ if (unlikely(error))
+ return error;
+
error = inode_change_ok(inode, iattr);
- if (error)
+ if (unlikely(error))
return error;
- error = inode_setattr(inode, iattr);
- return error;
+ if ((iattr->ia_valid & ATTR_SIZE) &&
+ iattr->ia_size != i_size_read(inode)) {
+ error = _do_truncate(inode, iattr->ia_size);
+ if (unlikely(error))
+ return error;
+ }
+
+ setattr_copy(inode, iattr);
+ mark_inode_dirty(inode);
+ return 0;
}
static const struct osd_attr g_attr_inode_file_layout = ATTR_DEF(
* from the OSD here. We make sure the object was created before we try and
* delete it.
*/
-void exofs_delete_inode(struct inode *inode)
+void exofs_evict_inode(struct inode *inode)
{
struct exofs_i_info *oi = exofs_i(inode);
struct super_block *sb = inode->i_sb;
truncate_inode_pages(&inode->i_data, 0);
- if (is_bad_inode(inode))
+ /* TODO: should do better here */
+ if (inode->i_nlink || is_bad_inode(inode))
goto no_delete;
- mark_inode_dirty(inode);
- exofs_update_inode(inode, inode_needs_sync(inode));
-
inode->i_size = 0;
- if (inode->i_blocks)
- exofs_truncate(inode);
+ end_writeback(inode);
- clear_inode(inode);
+ /* if we are deleting an obj that hasn't been created yet, wait */
+ if (!obj_created(oi)) {
+ BUG_ON(!obj_2bcreated(oi));
+ wait_event(oi->i_wq, obj_created(oi));
+ /* ignore the error attempt a remove anyway */
+ }
+ /* Now Remove the OSD objects */
ret = exofs_get_io_state(&sbi->layout, &ios);
if (unlikely(ret)) {
EXOFS_ERR("%s: exofs_get_io_state failed\n", __func__);
return;
}
- /* if we are deleting an obj that hasn't been created yet, wait */
- if (!obj_created(oi)) {
- BUG_ON(!obj_2bcreated(oi));
- wait_event(oi->i_wq, obj_created(oi));
- }
-
ios->obj.id = exofs_oi_objno(oi);
ios->done = delete_done;
ios->private = sbi;
return;
no_delete:
- clear_inode(inode);
+ end_writeback(inode);
}
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff