--- /dev/null
+/*
+ * Copyright (C) International Business Machines Corp., 2000-2004
+ * Portions Copyright (C) Christoph Hellwig, 2001-2002
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#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 "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 */
+ time_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: */
+ unchar _inline[128]; /* 128: inline symlink */
+ /* _inline_ea may overlay the last part of
+ * file._xtroot if maxentry = XTROOTINITSLOT
+ */
+ unchar _inline_ea[128]; /* 128: inline extended attr */
+ } 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 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 */
+ char uuid[16]; /* 128-bit uuid for volume */
+ char loguuid[16]; /* 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 list_entry(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 */
Code Review / kvmfornfv.git / blobdiff