freevxfs: implement ->alloc_inode and ->destroy_inode

This driver predates those methods and was trying to be clever allocating
it's own private data.  Switch to the generic scheme used by other file
systems.

Based on an earlier patch from Krzysztof Błaszkowski <kb@sysmikro.com.pl>.

Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 82 insertions, 133 deletions

diff --git a/fs/freevxfs/vxfs_inode.c b/fs/freevxfs/vxfs_inode.c
index 7b5de83405f2..b718d0ff2e45 100644
--- a/fs/freevxfs/vxfs_inode.c
+++ b/fs/freevxfs/vxfs_inode.c
@@ -42,11 +42,6 @@
 #include "vxfs_extern.h"
 
 
-struct kmem_cache		*vxfs_inode_cachep;
-
-static struct inode *		vxfs_get_fake_inode(struct super_block *,
-					struct vxfs_inode_info *);
-
 #ifdef DIAGNOSTIC
 /*
  * Dump inode contents (partially).
@@ -70,9 +65,42 @@ vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
 }
 #endif
 
+/**
+ * vxfs_transmod - mode for a VxFS inode
+ * @vip:	VxFS inode
+ *
+ * Description:
+ *  vxfs_transmod returns a Linux mode_t for a given
+ *  VxFS inode structure.
+ */
+static __inline__ umode_t
+vxfs_transmod(struct vxfs_inode_info *vip)
+{
+	umode_t			ret = vip->vii_mode & ~VXFS_TYPE_MASK;
+
+	if (VXFS_ISFIFO(vip))
+		ret |= S_IFIFO;
+	if (VXFS_ISCHR(vip))
+		ret |= S_IFCHR;
+	if (VXFS_ISDIR(vip))
+		ret |= S_IFDIR;
+	if (VXFS_ISBLK(vip))
+		ret |= S_IFBLK;
+	if (VXFS_ISLNK(vip))
+		ret |= S_IFLNK;
+	if (VXFS_ISREG(vip))
+		ret |= S_IFREG;
+	if (VXFS_ISSOC(vip))
+		ret |= S_IFSOCK;
+
+	return (ret);
+}
+
 static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
 		struct vxfs_inode_info *vip, struct vxfs_dinode *dip)
 {
+	struct inode *inode = &vip->vfs_inode;
+
 	vip->vii_mode = fs32_to_cpu(sbi, dip->vdi_mode);
 	vip->vii_nlink = fs32_to_cpu(sbi, dip->vdi_nlink);
 	vip->vii_uid = fs32_to_cpu(sbi, dip->vdi_uid);
@@ -96,6 +124,23 @@ static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
 
 	/* don't endian swap the fields that differ by orgtype */
 	memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));
+
+	inode->i_mode = vxfs_transmod(vip);
+	i_uid_write(inode, (uid_t)vip->vii_uid);
+	i_gid_write(inode, (gid_t)vip->vii_gid);
+
+	set_nlink(inode, vip->vii_nlink);
+	inode->i_size = vip->vii_size;
+
+	inode->i_atime.tv_sec = vip->vii_atime;
+	inode->i_ctime.tv_sec = vip->vii_ctime;
+	inode->i_mtime.tv_sec = vip->vii_mtime;
+	inode->i_atime.tv_nsec = 0;
+	inode->i_ctime.tv_nsec = 0;
+	inode->i_mtime.tv_nsec = 0;
+
+	inode->i_blocks = vip->vii_blocks;
+	inode->i_generation = vip->vii_gen;
 }
 
 /**
@@ -121,48 +166,48 @@ vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
 	struct inode			*inode;
 	u_long				block, offset;
 
+	inode = new_inode(sbp);
+	if (!inode)
+		return NULL;
+	inode->i_ino = get_next_ino();
+
 	block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
 	offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
 	bp = sb_bread(sbp, block);
 
 	if (bp && buffer_mapped(bp)) {
-		struct vxfs_inode_info	*vip;
+		struct vxfs_inode_info	*vip = VXFS_INO(inode);
 		struct vxfs_dinode	*dip;
 
-		if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
-			goto fail;
 		dip = (struct vxfs_dinode *)(bp->b_data + offset);
 		dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
+		vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
 #ifdef DIAGNOSTIC
 		vxfs_dumpi(vip, ino);
 #endif
 		brelse(bp);
-
-		inode = vxfs_get_fake_inode(sbp, vip);
-		if (!inode)
-			kmem_cache_free(vxfs_inode_cachep, vip);
 		return inode;
 	}
 
-fail:
 	printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
 	brelse(bp);
+	iput(inode);
 	return NULL;
 }
 
 /**
  * __vxfs_iget - generic find inode facility
- * @sbp:		VFS superblock
- * @ino:		inode number
  * @ilistp:		inode list
+ * @vip:		VxFS inode to fill in
+ * @ino:		inode number
  *
  * Description:
  *  Search the for inode number @ino in the filesystem
  *  described by @sbp.  Use the specified inode table (@ilistp).
  *  Returns the matching inode on success, else an error code.
  */
-static struct vxfs_inode_info *
-__vxfs_iget(ino_t ino, struct inode *ilistp)
+static int
+__vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino)
 {
 	struct page			*pp;
 	u_long				offset;
@@ -171,28 +216,22 @@ __vxfs_iget(ino_t ino, struct inode *ilistp)
 	pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
 
 	if (!IS_ERR(pp)) {
-		struct vxfs_inode_info	*vip;
 		struct vxfs_dinode	*dip;
 		caddr_t			kaddr = (char *)page_address(pp);
 
-		if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
-			goto fail;
 		dip = (struct vxfs_dinode *)(kaddr + offset);
 		dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
+		vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
 #ifdef DIAGNOSTIC
 		vxfs_dumpi(vip, ino);
 #endif
 		vxfs_put_page(pp);
-		return (vip);
+		return 0;
 	}
 
-	printk(KERN_WARNING "vxfs: error on page %p\n", pp);
-	return ERR_CAST(pp);
-
-fail:
-	printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino);
-	vxfs_put_page(pp);
-	return ERR_PTR(-ENOMEM);
+	printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
+		pp, (unsigned long)ino);
+	return PTR_ERR(pp);
 }
 
 /**
@@ -208,104 +247,21 @@ fail:
 struct inode *
 vxfs_stiget(struct super_block *sbp, ino_t ino)
 {
-	struct vxfs_inode_info *vip;
 	struct inode *inode;
+	int error;
 
-	vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist);
-	if (IS_ERR(vip))
-		return NULL;
-	inode = vxfs_get_fake_inode(sbp, vip);
+	inode = new_inode(sbp);
 	if (!inode)
-		kmem_cache_free(vxfs_inode_cachep, vip);
-	return inode;
-}
-
-/**
- * vxfs_transmod - mode for a VxFS inode
- * @vip:	VxFS inode
- *
- * Description:
- *  vxfs_transmod returns a Linux mode_t for a given
- *  VxFS inode structure.
- */
-static __inline__ umode_t
-vxfs_transmod(struct vxfs_inode_info *vip)
-{
-	umode_t			ret = vip->vii_mode & ~VXFS_TYPE_MASK;
-
-	if (VXFS_ISFIFO(vip))
-		ret |= S_IFIFO;
-	if (VXFS_ISCHR(vip))
-		ret |= S_IFCHR;
-	if (VXFS_ISDIR(vip))
-		ret |= S_IFDIR;
-	if (VXFS_ISBLK(vip))
-		ret |= S_IFBLK;
-	if (VXFS_ISLNK(vip))
-		ret |= S_IFLNK;
-	if (VXFS_ISREG(vip))
-		ret |= S_IFREG;
-	if (VXFS_ISSOC(vip))
-		ret |= S_IFSOCK;
-
-	return (ret);
-}
-
-/**
- * vxfs_iinit- helper to fill inode fields
- * @ip:		VFS inode
- * @vip:	VxFS inode
- *
- * Description:
- *  vxfs_instino is a helper function to fill in all relevant
- *  fields in @ip from @vip.
- */
-static void
-vxfs_iinit(struct inode *ip, struct vxfs_inode_info *vip)
-{
-
-	ip->i_mode = vxfs_transmod(vip);
-	i_uid_write(ip, (uid_t)vip->vii_uid);
-	i_gid_write(ip, (gid_t)vip->vii_gid);
-
-	set_nlink(ip, vip->vii_nlink);
-	ip->i_size = vip->vii_size;
-
-	ip->i_atime.tv_sec = vip->vii_atime;
-	ip->i_ctime.tv_sec = vip->vii_ctime;
-	ip->i_mtime.tv_sec = vip->vii_mtime;
-	ip->i_atime.tv_nsec = 0;
-	ip->i_ctime.tv_nsec = 0;
-	ip->i_mtime.tv_nsec = 0;
-
-	ip->i_blocks = vip->vii_blocks;
-	ip->i_generation = vip->vii_gen;
-
-	ip->i_private = vip;
-	
-}
-
-/**
- * vxfs_get_fake_inode - get fake inode structure
- * @sbp:		filesystem superblock
- * @vip:		fspriv inode
- *
- * Description:
- *  vxfs_fake_inode gets a fake inode (not in the inode hash) for a
- *  superblock, vxfs_inode pair.
- *  Returns the filled VFS inode.
- */
-static struct inode *
-vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip)
-{
-	struct inode			*ip = NULL;
+		return NULL;
+	inode->i_ino = get_next_ino();
 
-	if ((ip = new_inode(sbp))) {
-		ip->i_ino = get_next_ino();
-		vxfs_iinit(ip, vip);
-		ip->i_mapping->a_ops = &vxfs_aops;
+	error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
+	if (error) {
+		iput(inode);
+		return NULL;
 	}
-	return (ip);
+
+	return inode;
 }
 
 /**
@@ -323,6 +279,7 @@ vxfs_iget(struct super_block *sbp, ino_t ino)
 	struct vxfs_inode_info		*vip;
 	const struct address_space_operations	*aops;
 	struct inode *ip;
+	int error;
 
 	ip = iget_locked(sbp, ino);
 	if (!ip)
@@ -330,14 +287,13 @@ vxfs_iget(struct super_block *sbp, ino_t ino)
 	if (!(ip->i_state & I_NEW))
 		return ip;
 
-	vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist);
-	if (IS_ERR(vip)) {
+	vip = VXFS_INO(ip);
+	error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
+	if (error) {
 		iget_failed(ip);
-		return ERR_CAST(vip);
+		return ERR_PTR(error);
 	}
 
-	vxfs_iinit(ip, vip);
-
 	if (VXFS_ISIMMED(vip))
 		aops = &vxfs_immed_aops;
 	else
@@ -368,12 +324,6 @@ vxfs_iget(struct super_block *sbp, ino_t ino)
 	return ip;
 }
 
-static void vxfs_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(vxfs_inode_cachep, inode->i_private);
-}
-
 /**
  * vxfs_evict_inode - remove inode from main memory
  * @ip:		inode to discard.
@@ -387,5 +337,4 @@ vxfs_evict_inode(struct inode *ip)
 {
 	truncate_inode_pages_final(&ip->i_data);
 	clear_inode(ip);
-	call_rcu(&ip->i_rcu, vxfs_i_callback);
 }