@@ -1166,7 +1166,6 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
const struct gfs2_glock_operations *glops, int create,
struct gfs2_glock **glp)
{
- struct super_block *s = sdp->sd_vfs;
struct lm_lockname name = { .ln_number = number,
.ln_type = glops->go_type,
.ln_sbd = sdp };
@@ -1229,7 +1228,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
mapping = gfs2_glock2aspace(gl);
if (mapping) {
mapping->a_ops = &gfs2_meta_aops;
- mapping->host = s->s_bdev->bd_mapping->host;
+ mapping->host = sdp->sd_inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_NOFS);
mapping->i_private_data = NULL;
@@ -168,7 +168,7 @@ void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
static int gfs2_rgrp_metasync(struct gfs2_glock *gl)
{
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
- struct address_space *metamapping = &sdp->sd_aspace;
+ struct address_space *metamapping = gfs2_aspace(sdp);
struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
const unsigned bsize = sdp->sd_sb.sb_bsize;
loff_t start = (rgd->rd_addr * bsize) & PAGE_MASK;
@@ -225,7 +225,7 @@ static int rgrp_go_sync(struct gfs2_glock *gl)
static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
{
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
- struct address_space *mapping = &sdp->sd_aspace;
+ struct address_space *mapping = gfs2_aspace(sdp);
struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
const unsigned bsize = sdp->sd_sb.sb_bsize;
loff_t start, end;
@@ -795,7 +795,7 @@ struct gfs2_sbd {
/* Log stuff */
- struct address_space sd_aspace;
+ struct inode *sd_inode;
spinlock_t sd_log_lock;
@@ -851,6 +851,13 @@ struct gfs2_sbd {
unsigned long sd_glock_dqs_held;
};
+#define GFS2_BAD_INO 1
+
+static inline struct address_space *gfs2_aspace(struct gfs2_sbd *sdp)
+{
+ return sdp->sd_inode->i_mapping;
+}
+
static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
{
gl->gl_stats.stats[which]++;
@@ -132,7 +132,7 @@ struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create)
unsigned int bufnum;
if (mapping == NULL)
- mapping = &sdp->sd_aspace;
+ mapping = gfs2_aspace(sdp);
shift = PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift;
index = blkno >> shift; /* convert block to page */
@@ -44,9 +44,7 @@ static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping)
struct gfs2_glock_aspace *gla =
container_of(mapping, struct gfs2_glock_aspace, mapping);
return gla->glock.gl_name.ln_sbd;
- } else if (mapping->a_ops == &gfs2_rgrp_aops)
- return container_of(mapping, struct gfs2_sbd, sd_aspace);
- else
+ } else
return inode->i_sb->s_fs_info;
}
@@ -72,7 +72,6 @@ void free_sbd(struct gfs2_sbd *sdp)
static struct gfs2_sbd *init_sbd(struct super_block *sb)
{
struct gfs2_sbd *sdp;
- struct address_space *mapping;
sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
if (!sdp)
@@ -109,16 +108,6 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
INIT_LIST_HEAD(&sdp->sd_sc_inodes_list);
- mapping = &sdp->sd_aspace;
-
- address_space_init_once(mapping);
- mapping->a_ops = &gfs2_rgrp_aops;
- mapping->host = sb->s_bdev->bd_mapping->host;
- mapping->flags = 0;
- mapping_set_gfp_mask(mapping, GFP_NOFS);
- mapping->i_private_data = NULL;
- mapping->writeback_index = 0;
-
spin_lock_init(&sdp->sd_log_lock);
atomic_set(&sdp->sd_log_pinned, 0);
INIT_LIST_HEAD(&sdp->sd_log_revokes);
@@ -1135,6 +1124,7 @@ static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
int silent = fc->sb_flags & SB_SILENT;
struct gfs2_sbd *sdp;
struct gfs2_holder mount_gh;
+ struct address_space *mapping;
int error;
sdp = init_sbd(sb);
@@ -1156,6 +1146,18 @@ static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
sb->s_flags |= SB_NOSEC;
sb->s_magic = GFS2_MAGIC;
sb->s_op = &gfs2_super_ops;
+
+ /* Set up an address space for metadata writes */
+ sdp->sd_inode = new_inode(sb);
+ if (!sdp->sd_inode)
+ goto fail_free;
+ sdp->sd_inode->i_ino = GFS2_BAD_INO;
+ sdp->sd_inode->i_size = OFFSET_MAX;
+
+ mapping = gfs2_aspace(sdp);
+ mapping->a_ops = &gfs2_rgrp_aops;
+ mapping_set_gfp_mask(mapping, GFP_NOFS);
+
sb->s_d_op = &gfs2_dops;
sb->s_export_op = &gfs2_export_ops;
sb->s_qcop = &gfs2_quotactl_ops;
@@ -648,7 +648,7 @@ static void gfs2_put_super(struct super_block *sb)
gfs2_jindex_free(sdp);
/* Take apart glock structures and buffer lists */
gfs2_gl_hash_clear(sdp);
- truncate_inode_pages_final(&sdp->sd_aspace);
+ iput(sdp->sd_inode);
gfs2_delete_debugfs_file(sdp);
gfs2_sys_fs_del(sdp);
Use a dummy inode as mapping->host of the address spaces for global as well as per-inode metadata. The global metadata address space is now accessed as gfs2_aspace(sdp) instead of sdp->sd_aspace. The per-inode metadata address spaces are still accessed as gfs2_glock2aspace(GFS2_I(inode)->i_gl). Based on a previous version from Bob Peterson from several years ago. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> --- fs/gfs2/glock.c | 3 +-- fs/gfs2/glops.c | 4 ++-- fs/gfs2/incore.h | 9 ++++++++- fs/gfs2/meta_io.c | 2 +- fs/gfs2/meta_io.h | 4 +--- fs/gfs2/ops_fstype.c | 24 +++++++++++++----------- fs/gfs2/super.c | 2 +- 7 files changed, 27 insertions(+), 21 deletions(-)