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