linux/fs/ceph, branch v3.0.36

ceph analog of cifs build_path_from_dentry() race fix

2011-07-17T03:43:58Z

... unfortunately, cifs bug got copied. Fix is essentially the same. Signed-off-by: Al Viro

ceph: fix sync and dio writes across stripe boundaries

2011-06-13T23:26:22Z

We were iterating across stripe boundaries properly, but not moving the write buffer pointer forward. This caused us to rewrite the same data after the break. Fix by adjusting the data pointer forward, and recalculating the io and buffer alignment after the break. Signed-off-by: Sage Weil

ceph: fix page alignment corrections

2011-06-13T23:26:10Z

dd if=/dev/urandom of=/mnt/fs_depot/dd10 bs=500 seek=8388 count=1 dd if=/mnt/fs_depot/dd10 of=/root/dd10out bs=500 skip=8388 count=1 Reported-by: Henry C Chang Signed-off-by: Sage Weil

ceph: unwind canceled flock state

2011-06-08T04:36:45Z

If we request a lock and then abort (e.g., ^C), we need to send a matching unlock request to the MDS to unwind our lock attempt to avoid indefinitely blocking other clients. Reported-by: Brian Chrisman Signed-off-by: Sage Weil

ceph: fix ENOENT logic in striped_read

2011-06-08T04:34:16Z

Getting ENOENT is equivalent to reading 0 bytes. Make that correction before setting up the hit_stripe and was_short flags. Fixes the following case: dd if=/dev/zero of=/mnt/fs_depot/dd3 bs=1 seek=1048576 count=0 dd if=/mnt/fs_depot/dd3 of=/root/ddout1 skip=8 bs=500 count=2 iflag=direct Reported-by: Henry C Chang Signed-off-by: Sage Weil

ceph: fix short sync reads from the OSD

2011-06-08T04:34:14Z

If we get a short read from the OSD because the object is small, we need to zero the remainder of the buffer. For O_DIRECT reads, the attempted range is not trimmed to i_size by the VFS, so we were actually looping indefinitely. Fix by trimming by i_size, and the unconditionally zeroing the trailing range. Reported-by: Jeff Wu Signed-off-by: Sage Weil

ceph: use ihold when we already have an inode ref

2011-06-08T04:34:11Z

We should use ihold whenever we already have a stable inode ref, even when we aren't holding i_lock. This avoids adding new and unnecessary locking dependencies. Signed-off-by: Sage Weil

ceph: fix cap flush race reentrancy

2011-05-24T18:52:12Z

In e9964c10 we change cap flushing to do a delicate dance because some inodes on the cap_dirty list could be in a migrating state (got EXPORT but not IMPORT) in which we couldn't actually flush and move from dirty->flushing, breaking the while (!empty) { process first } loop structure. It worked for a single sync thread, but was not reentrant and triggered infinite loops when multiple syncers came along. Instead, move inodes with dirty to a separate cap_dirty_migrating list when in the limbo export-but-no-import state, allowing us to go back to the simple loop structure (which was reentrant). This is cleaner and more robust. Audited the cap_dirty users and this looks fine: list_empty(&ci->i_dirty_item) is still a reliable indicator of whether we have dirty caps (which list we're on is irrelevant) and list_del_init() calls still do the right thing. Signed-off-by: Sage Weil

ceph: avoid inode lookup on nfs fh reconnect

2011-05-24T18:52:06Z

If we get the inode from the MDS, we have a reference in req; don't do a fresh lookup. Signed-off-by: Sage Weil

ceph: use LOOKUPINO to make unconnected nfs fh more reliable

2011-05-24T18:52:05Z

If we are unable to locate an inode by ino, ask the MDS using the new LOOKUPINO command. Signed-off-by: Sage Weil