1 files changed, 226 insertions, 0 deletions
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
new file mode 100644
index 000000000..721def69e
--- /dev/null
+++ b/fs/jfs/jfs_incore.h
@@ -0,0 +1,226 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *   Copyright (C) International Business Machines Corp., 2000-2004
+ *   Portions Copyright (C) Christoph Hellwig, 2001-2002
+ */
+#ifndef _H_JFS_INCORE
+#define _H_JFS_INCORE
+
+#include <linux/mutex.h>
+#include <linux/rwsem.h>
+#include <linux/slab.h>
+#include <linux/bitops.h>
+#include <linux/uuid.h>
+
+#include "jfs_types.h"
+#include "jfs_xtree.h"
+#include "jfs_dtree.h"
+
+/*
+ * JFS magic number
+ */
+#define JFS_SUPER_MAGIC 0x3153464a /* "JFS1" */
+
+/*
+ * JFS-private inode information
+ */
+struct jfs_inode_info {
+	int	fileset;	/* fileset number (always 16)*/
+	uint	mode2;		/* jfs-specific mode		*/
+	kuid_t	saved_uid;	/* saved for uid mount option */
+	kgid_t	saved_gid;	/* saved for gid mount option */
+	pxd_t	ixpxd;		/* inode extent descriptor	*/
+	dxd_t	acl;		/* dxd describing acl	*/
+	dxd_t	ea;		/* dxd describing ea	*/
+	time64_t otime;		/* time created	*/
+	uint	next_index;	/* next available directory entry index */
+	int	acltype;	/* Type of ACL	*/
+	short	btorder;	/* access order	*/
+	short	btindex;	/* btpage entry index*/
+	struct inode *ipimap;	/* inode map			*/
+	unsigned long cflag;	/* commit flags		*/
+	u64	agstart;	/* agstart of the containing IAG */
+	u16	bxflag;		/* xflag of pseudo buffer?	*/
+	unchar	pad;
+	signed char active_ag;	/* ag currently allocating from	*/
+	lid_t	blid;		/* lid of pseudo buffer?	*/
+	lid_t	atlhead;	/* anonymous tlock list head	*/
+	lid_t	atltail;	/* anonymous tlock list tail	*/
+	spinlock_t ag_lock;	/* protects active_ag		*/
+	struct list_head anon_inode_list; /* inodes having anonymous txns */
+	/*
+	 * rdwrlock serializes xtree between reads & writes and synchronizes
+	 * changes to special inodes.  It's use would be redundant on
+	 * directories since the i_mutex taken in the VFS is sufficient.
+	 */
+	struct rw_semaphore rdwrlock;
+	/*
+	 * commit_mutex serializes transaction processing on an inode.
+	 * It must be taken after beginning a transaction (txBegin), since
+	 * dirty inodes may be committed while a new transaction on the
+	 * inode is blocked in txBegin or TxBeginAnon
+	 */
+	struct mutex commit_mutex;
+	/* xattr_sem allows us to access the xattrs without taking i_mutex */
+	struct rw_semaphore xattr_sem;
+	lid_t	xtlid;		/* lid of xtree lock on directory */
+	union {
+		struct {
+			xtpage_t _xtroot;	/* 288: xtree root */
+			struct inomap *_imap;	/* 4: inode map header	*/
+		} file;
+		struct {
+			struct dir_table_slot _table[12]; /* 96: dir index */
+			dtroot_t _dtroot;	/* 288: dtree root */
+		} dir;
+		struct {
+			unchar _unused[16];	/* 16: */
+			dxd_t _dxd;		/* 16: */
+			/* _inline may overflow into _inline_ea when needed */
+			/* _inline_ea may overlay the last part of
+			 * file._xtroot if maxentry = XTROOTINITSLOT
+			 */
+			union {
+				struct {
+					/* 128: inline symlink */
+					unchar _inline[128];
+					/* 128: inline extended attr */
+					unchar _inline_ea[128];
+				};
+				unchar _inline_all[256];
+			};
+		} link;
+	} u;
+#ifdef CONFIG_QUOTA
+	struct dquot *i_dquot[MAXQUOTAS];
+#endif
+	u32 dev;	/* will die when we get wide dev_t */
+	struct inode	vfs_inode;
+};
+#define i_xtroot u.file._xtroot
+#define i_imap u.file._imap
+#define i_dirtable u.dir._table
+#define i_dtroot u.dir._dtroot
+#define i_inline u.link._inline
+#define i_inline_ea u.link._inline_ea
+#define i_inline_all u.link._inline_all
+
+#define IREAD_LOCK(ip, subclass) \
+	down_read_nested(&JFS_IP(ip)->rdwrlock, subclass)
+#define IREAD_UNLOCK(ip)	up_read(&JFS_IP(ip)->rdwrlock)
+#define IWRITE_LOCK(ip, subclass) \
+	down_write_nested(&JFS_IP(ip)->rdwrlock, subclass)
+#define IWRITE_UNLOCK(ip)	up_write(&JFS_IP(ip)->rdwrlock)
+
+/*
+ * cflag
+ */
+enum cflags {
+	COMMIT_Nolink,		/* inode committed with zero link count */
+	COMMIT_Inlineea,	/* commit inode inline EA */
+	COMMIT_Freewmap,	/* free WMAP at iClose() */
+	COMMIT_Dirty,		/* Inode is really dirty */
+	COMMIT_Dirtable,	/* commit changes to di_dirtable */
+	COMMIT_Stale,		/* data extent is no longer valid */
+	COMMIT_Synclist,	/* metadata pages on group commit synclist */
+};
+
+/*
+ * commit_mutex nesting subclasses:
+ */
+enum commit_mutex_class
+{
+	COMMIT_MUTEX_PARENT,
+	COMMIT_MUTEX_CHILD,
+	COMMIT_MUTEX_SECOND_PARENT,	/* Renaming */
+	COMMIT_MUTEX_VICTIM		/* Inode being unlinked due to rename */
+};
+
+/*
+ * rdwrlock subclasses:
+ * The dmap inode may be locked while a normal inode or the imap inode are
+ * locked.
+ */
+enum rdwrlock_class
+{
+	RDWRLOCK_NORMAL,
+	RDWRLOCK_IMAP,
+	RDWRLOCK_DMAP
+};
+
+#define set_cflag(flag, ip)	set_bit(flag, &(JFS_IP(ip)->cflag))
+#define clear_cflag(flag, ip)	clear_bit(flag, &(JFS_IP(ip)->cflag))
+#define test_cflag(flag, ip)	test_bit(flag, &(JFS_IP(ip)->cflag))
+#define test_and_clear_cflag(flag, ip) \
+	test_and_clear_bit(flag, &(JFS_IP(ip)->cflag))
+/*
+ * JFS-private superblock information.
+ */
+struct jfs_sb_info {
+	struct super_block *sb;		/* Point back to vfs super block */
+	unsigned long	mntflag;	/* aggregate attributes	*/
+	struct inode	*ipbmap;	/* block map inode		*/
+	struct inode	*ipaimap;	/* aggregate inode map inode	*/
+	struct inode	*ipaimap2;	/* secondary aimap inode	*/
+	struct inode	*ipimap;	/* aggregate inode map inode	*/
+	struct jfs_log	*log;		/* log			*/
+	struct list_head log_list;	/* volumes associated with a journal */
+	short		bsize;		/* logical block size	*/
+	short		l2bsize;	/* log2 logical block size	*/
+	short		nbperpage;	/* blocks per page		*/
+	short		l2nbperpage;	/* log2 blocks per page	*/
+	short		l2niperblk;	/* log2 inodes per page	*/
+	dev_t		logdev;		/* external log device	*/
+	uint		aggregate;	/* volume identifier in log record */
+	pxd_t		logpxd;		/* pxd describing log	*/
+	pxd_t		fsckpxd;	/* pxd describing fsck wkspc */
+	pxd_t		ait2;		/* pxd describing AIT copy	*/
+	uuid_t		uuid;		/* 128-bit uuid for volume	*/
+	uuid_t		loguuid;	/* 128-bit uuid for log	*/
+	/*
+	 * commit_state is used for synchronization of the jfs_commit
+	 * threads.  It is protected by LAZY_LOCK().
+	 */
+	int		commit_state;	/* commit state */
+	/* Formerly in ipimap */
+	uint		gengen;		/* inode generation generator*/
+	uint		inostamp;	/* shows inode belongs to fileset*/
+
+	/* Formerly in ipbmap */
+	struct bmap	*bmap;		/* incore bmap descriptor	*/
+	struct nls_table *nls_tab;	/* current codepage		*/
+	struct inode *direct_inode;	/* metadata inode */
+	uint		state;		/* mount/recovery state	*/
+	unsigned long	flag;		/* mount time flags */
+	uint		p_state;	/* state prior to going no integrity */
+	kuid_t		uid;		/* uid to override on-disk uid */
+	kgid_t		gid;		/* gid to override on-disk gid */
+	uint		umask;		/* umask to override on-disk umask */
+	uint		minblks_trim;	/* minimum blocks, for online trim */
+};
+
+/* jfs_sb_info commit_state */
+#define IN_LAZYCOMMIT 1
+
+static inline struct jfs_inode_info *JFS_IP(struct inode *inode)
+{
+	return container_of(inode, struct jfs_inode_info, vfs_inode);
+}
+
+static inline int jfs_dirtable_inline(struct inode *inode)
+{
+	return (JFS_IP(inode)->next_index <= (MAX_INLINE_DIRTABLE_ENTRY + 1));
+}
+
+static inline struct jfs_sb_info *JFS_SBI(struct super_block *sb)
+{
+	return sb->s_fs_info;
+}
+
+static inline int isReadOnly(struct inode *inode)
+{
+	if (JFS_SBI(inode->i_sb)->log)
+		return 0;
+	return 1;
+}
+#endif /* _H_JFS_INCORE */