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 "util.h"
  14
  15 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
  16 {
  17         return !ip->i_height;
  18 }
  19
  20 static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
  21 {
  22         return ip->i_di.di_flags & GFS2_DIF_JDATA;
  23 }
  24
  25 static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
  26 {
  27         const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  28         return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
  29 }
  30
  31 static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
  32 {
  33         const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  34         return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
  35 }
  36
  37 static inline int gfs2_is_dir(const struct gfs2_inode *ip)
  38 {
  39         return S_ISDIR(ip->i_inode.i_mode);
  40 }
  41
  42 static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
  43 {
  44         inode->i_blocks = blocks <<
  45                 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  46 }
  47
  48 static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
  49 {
  50         return inode->i_blocks >>
  51                 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  52 }
  53
  54 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
  55 {
  56         gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
  57         change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
  58         inode->i_blocks += change;
  59 }
  60
  61 static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
  62                                   u64 no_formal_ino)
  63 {
  64         return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
  65 }
  66
  67 static inline void gfs2_inum_out(const struct gfs2_inode *ip,
  68                                  struct gfs2_dirent *dent)
  69 {
  70         dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
  71         dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
  72 }
  73
  74
  75 void gfs2_set_iop(struct inode *inode);
  76 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
  77                                 u64 no_addr, u64 no_formal_ino,
  78                                 int skip_freeing);
  79 struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
  80
  81 int gfs2_inode_refresh(struct gfs2_inode *ip);
  82
  83 int gfs2_dinode_dealloc(struct gfs2_inode *inode);
  84 int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
  85 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
  86                            int is_root);
  87 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
  88                            unsigned int mode, dev_t dev);
  89 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
  90                 struct gfs2_inode *ip);
  91 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
  92                    const struct gfs2_inode *ip);
  93 int gfs2_permission(struct inode *inode, int mask);
  94 int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
  95 int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
  96 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
  97 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
  98 void gfs2_dinode_print(const struct gfs2_inode *ip);
  99
 100 #endif /* __INODE_DOT_H__ */
 101