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 <linux/buffer_head.h> 15 #include <linux/mm.h> 16 #include "util.h" 17 18 extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask); 19 extern int gfs2_internal_read(struct gfs2_inode *ip, 20 struct file_ra_state *ra_state, 21 char *buf, loff_t *pos, unsigned size); 22 extern void gfs2_set_aops(struct inode *inode); 23 24 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip) 25 { 26 return !ip->i_height; 27 } 28 29 static inline int gfs2_is_jdata(const struct gfs2_inode *ip) 30 { 31 return ip->i_diskflags & GFS2_DIF_JDATA; 32 } 33 34 static inline int gfs2_is_writeback(const struct gfs2_inode *ip) 35 { 36 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 37 return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip); 38 } 39 40 static inline int gfs2_is_ordered(const struct gfs2_inode *ip) 41 { 42 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 43 return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip); 44 } 45 46 static inline int gfs2_is_dir(const struct gfs2_inode *ip) 47 { 48 return S_ISDIR(ip->i_inode.i_mode); 49 } 50 51 static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks) 52 { 53 inode->i_blocks = blocks << 54 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); 55 } 56 57 static inline u64 gfs2_get_inode_blocks(const struct inode *inode) 58 { 59 return inode->i_blocks >> 60 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); 61 } 62 63 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change) 64 { 65 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change)); 66 change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK); 67 inode->i_blocks += change; 68 } 69 70 static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr, 71 u64 no_formal_ino) 72 { 73 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino; 74 } 75 76 static inline void gfs2_inum_out(const struct gfs2_inode *ip, 77 struct gfs2_dirent *dent) 78 { 79 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); 80 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr); 81 } 82 83 84 extern void gfs2_set_iop(struct inode *inode); 85 extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 86 u64 no_addr, u64 no_formal_ino, 87 int skip_freeing); 88 extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr); 89 90 extern int gfs2_inode_refresh(struct gfs2_inode *ip); 91 92 extern int gfs2_dinode_dealloc(struct gfs2_inode *inode); 93 extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff); 94 extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 95 int is_root); 96 extern struct inode *gfs2_createi(struct gfs2_holder *ghs, 97 const struct qstr *name, 98 unsigned int mode, dev_t dev); 99 extern int gfs2_permission(struct inode *inode, int mask); 100 extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr); 101 extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); 102 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); 103 extern void gfs2_dinode_print(const struct gfs2_inode *ip); 104 105 extern const struct inode_operations gfs2_file_iops; 106 extern const struct inode_operations gfs2_dir_iops; 107 extern const struct inode_operations gfs2_symlink_iops; 108 extern const struct file_operations gfs2_file_fops_nolock; 109 extern const struct file_operations gfs2_dir_fops_nolock; 110 111 extern void gfs2_set_inode_flags(struct inode *inode); 112 113 #ifdef CONFIG_GFS2_FS_LOCKING_DLM 114 extern const struct file_operations gfs2_file_fops; 115 extern const struct file_operations gfs2_dir_fops; 116 117 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) 118 { 119 return sdp->sd_args.ar_localflocks; 120 } 121 #else /* Single node only */ 122 #define gfs2_file_fops gfs2_file_fops_nolock 123 #define gfs2_dir_fops gfs2_dir_fops_nolock 124 125 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) 126 { 127 return 1; 128 } 129 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ 130 131 #endif /* __INODE_DOT_H__ */ 132 133