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GFS2: Fix address space from page function 

Now that rgrps use the address space which is part of the super
block, we need to update gfs2_mapping2sbd() to take account of
that. The only way to do that easily is to use a different set
of address_space_operations for rgrps.

Reported-by: Abhi Das <adas@redhat.com>
Tested-by: Abhi Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2014-03-31 17:48:27 +01:00
parent 059788039f
commit 1b2ad41214
3 changed files with 9 additions and 1 deletions
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5
fs/gfs2/meta_io.c
View File

@ -97,6 +97,11 @@ const struct address_space_operations gfs2_meta_aops = {
.releasepage = gfs2_releasepage,
};
const struct address_space_operations gfs2_rgrp_aops = {
.writepage = gfs2_aspace_writepage,
.releasepage = gfs2_releasepage,
};
/**
* gfs2_getbuf - Get a buffer with a given address space
* @gl: the glock

3
fs/gfs2/meta_io.h
View File

@ -38,12 +38,15 @@ static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
}
extern const struct address_space_operations gfs2_meta_aops;
extern const struct address_space_operations gfs2_rgrp_aops;
static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping)
{
struct inode *inode = mapping->host;
if (mapping->a_ops == &gfs2_meta_aops)
return (((struct gfs2_glock *)mapping) - 1)->gl_sbd;
else if (mapping->a_ops == &gfs2_rgrp_aops)
return container_of(mapping, struct gfs2_sbd, sd_aspace);
else
return inode->i_sb->s_fs_info;
}

2
fs/gfs2/ops_fstype.c
View File

@ -106,7 +106,7 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
mapping = &sdp->sd_aspace;
address_space_init_once(mapping);
mapping->a_ops = &gfs2_meta_aops;
mapping->a_ops = &gfs2_rgrp_aops;
mapping->host = sb->s_bdev->bd_inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_NOFS);