diff options
author | Steven Whitehouse <swhiteho@redhat.com> | 2009-04-07 14:13:01 +0100 |
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committer | Steven Whitehouse <swhiteho@redhat.com> | 2009-05-11 12:36:41 +0100 |
commit | c969f58ca43fc403c75f5d3da4cf1e21de7afaa0 (patch) | |
tree | d38b579882f89c222937530c527224e2a77548b0 /fs/gfs2/meta_io.c | |
parent | a4d7749be5de4a7261bcbe3c7d96c748792ec455 (diff) | |
download | op-kernel-dev-c969f58ca43fc403c75f5d3da4cf1e21de7afaa0.zip op-kernel-dev-c969f58ca43fc403c75f5d3da4cf1e21de7afaa0.tar.gz |
GFS2: Update the rw flags
After Jens recent updates:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a1f242524c3c1f5d40f1c9c343427e34d1aadd6e
et al. this is a patch to bring gfs2 uptodate with the core
code. Also I've managed to squash another call to ll_rw_block()
along the way.
There is still one part of the GFS2 I/O paths which are not correctly
annotated and that is due to the sharing of the writeback code between
the data and metadata address spaces. I would like to change that too,
but this patch is still worth doing on its own, I think.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/meta_io.c')
-rw-r--r-- | fs/gfs2/meta_io.c | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c index 8d6f132..75b2aec 100644 --- a/fs/gfs2/meta_io.c +++ b/fs/gfs2/meta_io.c @@ -201,16 +201,32 @@ struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno) int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags, struct buffer_head **bhp) { - *bhp = gfs2_getbuf(gl, blkno, CREATE); - if (!buffer_uptodate(*bhp)) { - ll_rw_block(READ_META, 1, bhp); - if (flags & DIO_WAIT) { - int error = gfs2_meta_wait(gl->gl_sbd, *bhp); - if (error) { - brelse(*bhp); - return error; - } - } + struct gfs2_sbd *sdp = gl->gl_sbd; + struct buffer_head *bh; + + if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) + return -EIO; + + *bhp = bh = gfs2_getbuf(gl, blkno, CREATE); + + lock_buffer(bh); + if (buffer_uptodate(bh)) { + unlock_buffer(bh); + return 0; + } + bh->b_end_io = end_buffer_read_sync; + get_bh(bh); + submit_bh(READ_SYNC | (1 << BIO_RW_META), bh); + if (!(flags & DIO_WAIT)) + return 0; + + wait_on_buffer(bh); + if (unlikely(!buffer_uptodate(bh))) { + struct gfs2_trans *tr = current->journal_info; + if (tr && tr->tr_touched) + gfs2_io_error_bh(sdp, bh); + brelse(bh); + return -EIO; } return 0; @@ -404,7 +420,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen) if (buffer_uptodate(first_bh)) goto out; if (!buffer_locked(first_bh)) - ll_rw_block(READ_META, 1, &first_bh); + ll_rw_block(READ_SYNC | (1 << BIO_RW_META), 1, &first_bh); dblock++; extlen--; |