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orangefs: write range tracking

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Attach the actual range of bytes written to plus the responsible uid/gid
to each dirty page.  This information must be sent to the server when
the page is written out.

Now write_begin, page_mkwrite, and invalidatepage keep up with this
information.  There are several conditions where they must write out the
page immediately to store the new range.  Two non-contiguous ranges
cannot be stored on a single page.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
This commit is contained in:
Martin Brandenburg
2018-12-14 15:24:43 -05:00
committed by Mike Marshall
parent 90fc07065a
commit 52e2d0a380
3 changed files with 274 additions and 35 deletions
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10
fs/orangefs/file.c
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@@ -46,8 +46,8 @@ static int flush_racache(struct inode *inode)
* Post and wait for the I/O upcall to finish
*/
ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inode,
loff_t *offset, struct iov_iter *iter,
size_t total_size, loff_t readahead_size)
loff_t *offset, struct iov_iter *iter, size_t total_size,
loff_t readahead_size, struct orangefs_write_range *wr)
{
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
@@ -85,6 +85,10 @@ populate_shared_memory:
new_op->upcall.req.io.buf_index = buffer_index;
new_op->upcall.req.io.count = total_size;
new_op->upcall.req.io.offset = *offset;
if (type == ORANGEFS_IO_WRITE && wr) {
new_op->upcall.uid = from_kuid(&init_user_ns, wr->uid);
new_op->upcall.gid = from_kgid(&init_user_ns, wr->gid);
}
gossip_debug(GOSSIP_FILE_DEBUG,
"%s(%pU): offset: %llu total_size: %zd\n",
@@ -329,7 +333,7 @@ static vm_fault_t orangefs_fault(struct vm_fault *vmf)
static const struct vm_operations_struct orangefs_file_vm_ops = {
.fault = orangefs_fault,
.map_pages = filemap_map_pages,
.page_mkwrite = filemap_page_mkwrite,
.page_mkwrite = orangefs_page_mkwrite,
};
/*