gfs2: Minor gfs2_lookup_by_inum cleanup
Use a zero no_formal_ino instead of a NULL pointer to indicate that any inode
generation number will qualify: a valid inode never has a zero no_formal_ino.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c
index 3f71728..756d057 100644
--- a/fs/gfs2/export.c
+++ b/fs/gfs2/export.c
@@ -134,7 +134,9 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb,
struct gfs2_sbd *sdp = sb->s_fs_info;
struct inode *inode;
- inode = gfs2_lookup_by_inum(sdp, inum->no_addr, &inum->no_formal_ino,
+ if (!inum->no_formal_ino)
+ return ERR_PTR(-ESTALE);
+ inode = gfs2_lookup_by_inum(sdp, inum->no_addr, inum->no_formal_ino,
GFS2_BLKST_DINODE);
if (IS_ERR(inode))
return ERR_CAST(inode);
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index bf7daa3..b6078b0 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -843,7 +843,7 @@ static void delete_work_func(struct work_struct *work)
}
}
- inode = gfs2_lookup_by_inum(sdp, no_addr, NULL, GFS2_BLKST_UNLINKED);
+ inode = gfs2_lookup_by_inum(sdp, no_addr, 0, GFS2_BLKST_UNLINKED);
if (!IS_ERR_OR_NULL(inode)) {
d_prune_aliases(inode);
iput(inode);
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index a411290..812a6ae0 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -207,8 +207,15 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
return ERR_PTR(error);
}
+/**
+ * gfs2_lookup_by_inum - look up an inode by inode number
+ * @sdp: The super block
+ * @no_addr: The inode number
+ * @no_formal_ino: The inode generation number (0 for any)
+ * @blktype: Requested block type (see gfs2_inode_lookup)
+ */
struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
- u64 *no_formal_ino, unsigned int blktype)
+ u64 no_formal_ino, unsigned int blktype)
{
struct super_block *sb = sdp->sd_vfs;
struct inode *inode;
@@ -221,7 +228,7 @@ struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
/* Two extra checks for NFS only */
if (no_formal_ino) {
error = -ESTALE;
- if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
+ if (GFS2_I(inode)->i_no_formal_ino != no_formal_ino)
goto fail_iput;
error = -EIO;
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index 580adbf..b52ecf4 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -92,7 +92,7 @@ extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
u64 no_addr, u64 no_formal_ino,
unsigned int blktype);
extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
- u64 *no_formal_ino,
+ u64 no_formal_ino,
unsigned int blktype);
extern int gfs2_inode_refresh(struct gfs2_inode *ip);