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gfs2: new export ops

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Convert gfs2 to the new ops.  Uses a similar structure to the generic helpers,
but gfs2 has it's own file handle formats.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Neil Brown <neilb@suse.de>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2007-10-21 16:42:14 -07:00 committed by Linus Torvalds
parent be55caf177
commit 34c0d15424
1 changed files with 43 additions and 38 deletions
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81
fs/gfs2/ops_export.c
View file

@ -31,40 +31,6 @@
#define GFS2_LARGE_FH_SIZE 8
#define GFS2_OLD_FH_SIZE 10
static struct dentry *gfs2_decode_fh(struct super_block *sb,
__u32 *p,
int fh_len,
int fh_type,
int (*acceptable)(void *context,
struct dentry *dentry),
void *context)
{
__be32 *fh = (__force __be32 *)p;
struct gfs2_inum_host inum, parent;
memset(&parent, 0, sizeof(struct gfs2_inum));
switch (fh_len) {
case GFS2_LARGE_FH_SIZE:
case GFS2_OLD_FH_SIZE:
parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
parent.no_formal_ino |= be32_to_cpu(fh[5]);
parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32;
parent.no_addr |= be32_to_cpu(fh[7]);
case GFS2_SMALL_FH_SIZE:
inum.no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32;
inum.no_formal_ino |= be32_to_cpu(fh[1]);
inum.no_addr = ((u64)be32_to_cpu(fh[2])) << 32;
inum.no_addr |= be32_to_cpu(fh[3]);
break;
default:
return NULL;
}
return gfs2_export_ops.find_exported_dentry(sb, &inum, &parent,
acceptable, context);
}
static int gfs2_encode_fh(struct dentry *dentry, __u32 *p, int *len,
int connectable)
{
@ -189,10 +155,10 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
return dentry;
}
static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
static struct dentry *gfs2_get_dentry(struct super_block *sb,
struct gfs2_inum_host *inum)
{
struct gfs2_sbd *sdp = sb->s_fs_info;
struct gfs2_inum_host *inum = inum_obj;
struct gfs2_holder i_gh, ri_gh, rgd_gh;
struct gfs2_rgrpd *rgd;
struct inode *inode;
@ -289,11 +255,50 @@ fail:
return ERR_PTR(error);
}
static struct dentry *gfs2_fh_to_dentry(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type)
{
struct gfs2_inum_host this;
__be32 *fh = (__force __be32 *)fid->raw;
switch (fh_type) {
case GFS2_SMALL_FH_SIZE:
case GFS2_LARGE_FH_SIZE:
case GFS2_OLD_FH_SIZE:
this.no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32;
this.no_formal_ino |= be32_to_cpu(fh[1]);
this.no_addr = ((u64)be32_to_cpu(fh[2])) << 32;
this.no_addr |= be32_to_cpu(fh[3]);
return gfs2_get_dentry(sb, &this);
default:
return NULL;
}
}
static struct dentry *gfs2_fh_to_parent(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type)
{
struct gfs2_inum_host parent;
__be32 *fh = (__force __be32 *)fid->raw;
switch (fh_type) {
case GFS2_LARGE_FH_SIZE:
case GFS2_OLD_FH_SIZE:
parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
parent.no_formal_ino |= be32_to_cpu(fh[5]);
parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32;
parent.no_addr |= be32_to_cpu(fh[7]);
return gfs2_get_dentry(sb, &parent);
default:
return NULL;
}
}
struct export_operations gfs2_export_ops = {
.decode_fh = gfs2_decode_fh,
.encode_fh = gfs2_encode_fh,
.fh_to_dentry = gfs2_fh_to_dentry,
.fh_to_parent = gfs2_fh_to_parent,
.get_name = gfs2_get_name,
.get_parent = gfs2_get_parent,
.get_dentry = gfs2_get_dentry,
};