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path: root/fs/gfs2/glops.h
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2011-10-21GFS2: Fix AIL flush issue during fsyncSteven Whitehouse1-1/+1
Unfortunately, it is not enough to just ignore locked buffers during the AIL flush from fsync. We need to be able to ignore all buffers which are locked, dirty or pinned at this stage as they might have been added subsequent to the log flush earlier in the fsync function. In addition, this means that we no longer need to rely on i_mutex to keep out writes during fsync, so we can, as a side-effect, remove that protection too. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Tested-By: Abhijith Das <adas@redhat.com>
2011-04-20GFS2: Clean up fsync()Steven Whitehouse1-0/+2
This patch is designed to clean up GFS2's fsync implementation and ensure that it really does get everything on disk. Since ->write_inode() has been updated, we can call that via the vfs library function sync_inode_metadata() and the only remaining thing that has to be done is to ensure that we get any revoke records in the log after the inode has been written back. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2009-03-24GFS2: Add a "demote a glock" interface to sysfsSteven Whitehouse1-0/+1
This adds a sysfs file called demote_rq to GFS2's per filesystem directory. Its possible to use this file to demote arbitrary glocks in exactly the same way as if a request had come in from a remote node. This is intended for testing issues relating to caching of data under glocks. Despite that, the interface is generic enough to send requests to any type of glock, but be careful as its not always safe to send an arbitrary message to an arbitrary glock. For that reason and to prevent DoS, this interface is restricted to root only. The messages look like this: <type>:<glocknumber> <mode> Example: echo -n "2:13324 EX" >/sys/fs/gfs2/unity:myfs/demote_rq Which means "please demote inode glock (type 2) number 13324 so that I can get an EX (exclusive) lock". The lock modes are those which would normally be sent by a remote node in its callback so if you want to unlock a glock, you use EX, to demote to shared, use SH or PR (depending on whether you like GFS2 or DLM lock modes better!). If the glock doesn't exist, you'll get -ENOENT returned. If the arguments don't make sense, you'll get -EINVAL returned. The plan is that this interface will be used in combination with the blktrace patch which I recently posted for comments although it is, of course, still useful in its own right. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-05[GFS2] Make headers compile on their ownSteven Whitehouse1-0/+2
As per Jan Engelhardt's comments, this should make all the headers compile on their own by including and/or declaring structures early. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-01[GFS2] Update copyright, tidy up incore.hSteven Whitehouse1-1/+1
As per comments from Jan Engelhardt <jengelh@linux01.gwdg.de> this updates the copyright message to say "version" in full rather than "v.2". Also incore.h has been updated to remove forward structure declarations which are not required. The gfs2_quota_lvb structure has now had endianess annotations added to it. Also quota.c has been updated so that we now store the lvb data locally in endian independant format to avoid needing a structure in host endianess too. As a result the endianess conversions are done as required at various points and thus the conversion routines in lvb.[ch] are no longer required. I've moved the one remaining constant in lvb.h thats used into lm.h and removed the unused lvb.[ch]. I have not changed the HIF_ constants. That is left to a later patch which I hope will unify the gh_flags and gh_iflags fields of the struct gfs2_holder. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-30[GFS2] Make glock operations constSteven Whitehouse1-9/+9
For all the usual reasons of enforcing correctness and potentially reducing code size, this patch makes the glock operations const. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-05-18[GFS2] Update copyright date to 2006Steven Whitehouse1-1/+1
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-16[GFS2] The core of GFS2David Teigland1-0/+23
This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>