linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2010-12-17	ceph: mark user pages dirty on direct-io reads	Henry C Chang	1	-2/+4
	For read operation, we have to set the argument _write_ of get_user_pages to 1 since we will write data to pages. Also, we need to SetPageDirty before releasing these pages. Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com> Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-09	ceph: explicitly specify page alignment in network messages	Sage Weil	1	-0/+1
	The alignment used for reading data into or out of pages used to be taken from the data_off field in the message header. This only worked as long as the page alignment matched the object offset, breaking direct io to non-page aligned offsets. Instead, explicitly specify the page alignment next to the page vector in the ceph_msg struct, and use that instead of the message header (which probably shouldn't be trusted). The alloc_msg callback is responsible for filling in this field properly when it sets up the page vector. Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-09	ceph: make page alignment explicit in osd interface	Sage Weil	1	-2/+5
	We used to infer alignment of IOs within a page based on the file offset, which assumed they matched. This broke with direct IO that was not aligned to pages (e.g., 512-byte aligned IO). We were also trusting the alignment specified in the OSD reply, which could have been adjusted by the server. Explicitly specify the page alignment when setting up OSD IO requests. Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-09	ceph: fix comment, remove extraneous args	Sage Weil	1	-2/+1
	The offset/length arguments aren't used. Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20	ceph: add CEPH_MDS_OP_SETDIRLAYOUT and associated ioctl.	Greg Farnum	1	-0/+1
	Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20	ceph: add pagelist_reserve, pagelist_truncate, pagelist_set_cursor	Greg Farnum	1	-0/+21
	These facilitate preallocation of pages so that we can encode into the pagelist in an atomic context. Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20	ceph: factor out libceph from Ceph file system	Yehuda Sadeh	19	-0/+2999
	This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>