kernel.git/fs/ceph/addr.c, branch linux-2.6.37.y

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

2010-11-19T23:32:22Z

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: ceph: fix readdir EOVERFLOW on 32-bit archs ceph: fix frag offset for non-leftmost frags ceph: fix dangling pointer ceph: explicitly specify page alignment in network messages ceph: make page alignment explicit in osd interface ceph: fix comment, remove extraneous args ceph: fix update of ctime from MDS ceph: fix version check on racing inode updates ceph: fix uid/gid on resent mds requests ceph: fix rdcache_gen usage and invalidate ceph: re-request max_size if cap auth changes ceph: only let auth caps update max_size ceph: fix open for write on clustered mds ceph: fix bad pointer dereference in ceph_fill_trace ceph: fix small seq message skipping Revert "ceph: update issue_seq on cap grant"

ceph: make page alignment explicit in osd interface

2010-11-09T20:43:12Z

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

writeback: remove nonblocking/encountered_congestion references

2010-10-26T23:52:05Z

This removes more dead code that was somehow missed by commit 0d99519efef (writeback: remove unused nonblocking and congestion checks). There are no behavior change except for the removal of two entries from one of the ext4 tracing interface. The nonblocking checks in ->writepages are no longer used because the flusher now prefer to block on get_request_wait() than to skip inodes on IO congestion. The latter will lead to more seeky IO. The nonblocking checks in ->writepage are no longer used because it's redundant with the WB_SYNC_NONE check. We no long set ->nonblocking in VM page out and page migration, because a) it's effectively redundant with WB_SYNC_NONE in current code b) it's old semantic of "Don't get stuck on request queues" is mis-behavior: that would skip some dirty inodes on congestion and page out others, which is unfair in terms of LRU age. Inspired by Christoph Hellwig. Thanks! Signed-off-by: Wu Fengguang Cc: Theodore Ts'o Cc: David Howells Cc: Sage Weil Cc: Steve French Cc: Chris Mason Cc: Jens Axboe Cc: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ceph: factor out libceph from Ceph file system

2010-10-20T22:37:28Z

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

ceph: fix cap_snap and realm split

2010-09-16T23:26:51Z

The cap_snap creation/queueing relies on both the current i_head_snapc _and_ the i_snap_realm pointers being correct, so that the new cap_snap can properly reference the old context and the new i_head_snapc can be updated to reference the new snaprealm's context. To fix this, we: - move inodes completely to the new (split) realm so that i_snap_realm is correct, and - generate the new snapc's _before_ queueing the cap_snaps in ceph_update_snap_trace(). Signed-off-by: Sage Weil

ceph: fix file offset wrapping at 4GB on 32-bit archs

2010-09-11T17:55:25Z

Cast the value before shifting so that we don't run out of bits with a 32-bit unsigned long. This fixes wrapping of high file offsets into the low 4GB of a file on disk, and the subsequent data corruption for large files. Signed-off-by: Sage Weil

ceph: maintain i_head_snapc when any caps are dirty, not just for data

2010-08-24T23:24:18Z

We used to use i_head_snapc to keep track of which snapc the current epoch of dirty data was dirtied under. It is used by queue_cap_snap to set up the cap_snap. However, since we queue cap snaps for any dirty caps, not just for dirty file data, we need to keep a valid i_head_snapc anytime we have dirty|flushing caps. This fixes a NULL pointer deref in queue_cap_snap when writing back dirty caps without data (e.g., snaptest-authwb.sh). Signed-off-by: Sage Weil

mm: exporting account_page_dirty

2010-08-22T22:16:51Z

This allows code outside of the mm core to safely manipulate page state and not worry about the other accounting. Not using these routines means that some code will lose track of the accounting and we get bugs. This has happened once already. Signed-off-by: Michael Rubin Signed-off-by: Sage Weil

ceph: whitespace cleanup

2010-08-03T17:25:11Z

Signed-off-by: Sage Weil

ceph: perform lazy reads when file mode and caps permit

2010-08-02T03:11:39Z

If the file mode is marked as "lazy," perform cached/buffered reads when the caps permit it. Adjust the rdcache_gen and invalidation logic accordingly so that we manage our cache based on the FILE_CACHE -or- FILE_LAZYIO cap bits. Signed-off-by: Sage Weil