unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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exofs: Allow O_DIRECT open

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With this minimal do nothing patch an application can open O_DIRECT
and then actually do buffered sync IO instead. But the aio API is
supported which is a good thing

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
This commit is contained in:
Boaz Harrosh 2014-01-13 23:45:43 +02:00
parent 2deb76db09
commit d83c7eb65d
1 changed files with 9 additions and 1 deletions
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10
fs/exofs/inode.c
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@ -961,6 +961,14 @@ static void exofs_invalidatepage(struct page *page, unsigned int offset,
WARN_ON(1);
}
/* TODO: Should be easy enough to do proprly */
static ssize_t exofs_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
return 0;
}
const struct address_space_operations exofs_aops = {
.readpage = exofs_readpage,
.readpages = exofs_readpages,
@ -974,7 +982,7 @@ const struct address_space_operations exofs_aops = {
/* Not implemented Yet */
.bmap = NULL, /* TODO: use osd's OSD_ACT_READ_MAP */
.direct_IO = NULL, /* TODO: Should be trivial to do */
.direct_IO = exofs_direct_IO,
/* With these NULL has special meaning or default is not exported */
.get_xip_mem = NULL,