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exofs: Add default address_space_operations 

All vectors of address_space_operations should be initialized
by the filesystem. Add the missing parts.

This is actually an optimization, by using
__set_page_dirty_nobuffers. The default, in case of NULL,
would be __set_page_dirty_buffers which has these extar if(s).

.releasepage && .invalidatepage should both not be called
because page_private() is NULL in exofs. Put a WARN_ON if
they are called, to indicate the Kernel has changed in this
regard, if when it does.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
This commit is contained in:
Boaz Harrosh 2010-03-22 11:23:40 +02:00
parent e40152ee1e
commit 200b070042
1 changed files with 30 additions and 0 deletions
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30
fs/exofs/inode.c
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@ -755,6 +755,21 @@ static int exofs_write_end(struct file *file, struct address_space *mapping,
return ret;
}
static int exofs_releasepage(struct page *page, gfp_t gfp)
{
EXOFS_DBGMSG("page 0x%lx\n", page->index);
WARN_ON(1);
return try_to_free_buffers(page);
}
static void exofs_invalidatepage(struct page *page, unsigned long offset)
{
EXOFS_DBGMSG("page_has_buffers=>%d\n", page_has_buffers(page));
WARN_ON(1);
block_invalidatepage(page, offset);
}
const struct address_space_operations exofs_aops = {
.readpage = exofs_readpage,
.readpages = exofs_readpages,
@ -762,6 +777,21 @@ const struct address_space_operations exofs_aops = {
.writepages = exofs_writepages,
.write_begin = exofs_write_begin_export,
.write_end = exofs_write_end,
.releasepage = exofs_releasepage,
.set_page_dirty = __set_page_dirty_nobuffers,
.invalidatepage = exofs_invalidatepage,
/* Not implemented Yet */
.bmap = NULL, /* TODO: use osd's OSD_ACT_READ_MAP */
.direct_IO = NULL, /* TODO: Should be trivial to do */
/* With these NULL has special meaning or default is not exported */
.sync_page = NULL,
.get_xip_mem = NULL,
.migratepage = NULL,
.launder_page = NULL,
.is_partially_uptodate = NULL,
.error_remove_page = NULL,
};
/******************************************************************************