fs/gfs2/inode.h

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License version 2.
   8  */
   9
  10 #ifndef __INODE_DOT_H__
  11 #define __INODE_DOT_H__
  12
  13 #include <linux/fs.h>
  14 #include "util.h"
  15
  16 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
  17 {
  18         return !ip->i_height;
  19 }
  20
  21 static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
  22 {
  23         return ip->i_diskflags & GFS2_DIF_JDATA;
  24 }
  25
  26 static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
  27 {
  28         const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  29         return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
  30 }
  31
  32 static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
  33 {
  34         const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  35         return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
  36 }
  37
  38 static inline int gfs2_is_dir(const struct gfs2_inode *ip)
  39 {
  40         return S_ISDIR(ip->i_inode.i_mode);
  41 }
  42
  43 static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
  44 {
  45         inode->i_blocks = blocks <<
  46                 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  47 }
  48
  49 static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
  50 {
  51         return inode->i_blocks >>
  52                 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  53 }
  54
  55 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
  56 {
  57         gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
  58         change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
  59         inode->i_blocks += change;
  60 }
  61
  62 static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
  63                                   u64 no_formal_ino)
  64 {
  65         return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
  66 }
  67
  68 static inline void gfs2_inum_out(const struct gfs2_inode *ip,
  69                                  struct gfs2_dirent *dent)
  70 {
  71         dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
  72         dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
  73 }
  74
  75
  76 void gfs2_set_iop(struct inode *inode);
  77 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
  78                                 u64 no_addr, u64 no_formal_ino,
  79                                 int skip_freeing);
  80 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
  81
  82 int gfs2_inode_refresh(struct gfs2_inode *ip);
  83
  84 int gfs2_dinode_dealloc(struct gfs2_inode *inode);
  85 int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
  86 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
  87                            int is_root);
  88 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
  89                            unsigned int mode, dev_t dev);
  90 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
  91                 struct gfs2_inode *ip);
  92 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
  93                    const struct gfs2_inode *ip);
  94 int gfs2_permission(struct inode *inode, int mask);
  95 int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
  96 int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
  97 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
  98 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
  99 void gfs2_dinode_print(const struct gfs2_inode *ip);
 100
 101 extern const struct inode_operations gfs2_file_iops;
 102 extern const struct inode_operations gfs2_dir_iops;
 103 extern const struct inode_operations gfs2_symlink_iops;
 104 extern const struct file_operations *gfs2_file_fops_nolock;
 105 extern const struct file_operations *gfs2_dir_fops_nolock;
 106
 107 extern void gfs2_set_inode_flags(struct inode *inode);
 108
 109 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
 110 extern const struct file_operations *gfs2_file_fops;
 111 extern const struct file_operations *gfs2_dir_fops;
 112 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
 113 {
 114         return sdp->sd_args.ar_localflocks;
 115 }
 116 #else /* Single node only */
 117 #define gfs2_file_fops NULL
 118 #define gfs2_dir_fops NULL
 119 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
 120 {
 121         return 1;
 122 }
 123 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */
 124
 125 #endif /* __INODE_DOT_H__ */
 126