| /* |
| * 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 */ |
| uint saved_uid; /* saved for uid mount option */ |
| uint 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; |
| 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 */ |
| uint uid; /* uid to override on-disk uid */ |
| uint gid; /* gid to override on-disk gid */ |
| uint umask; /* umask to override on-disk umask */ |
| }; |
| |
| /* 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 */ |