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_page_add_databufs(struct gfs2_inode *ip, struct page *page, 23 unsigned int from, unsigned int to); 24 extern void gfs2_set_aops(struct inode *inode); 25 26 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip) 27 { 28 return !ip->i_height; 29 } 30 31 static inline int gfs2_is_jdata(const struct gfs2_inode *ip) 32 { 33 return ip->i_diskflags & GFS2_DIF_JDATA; 34 } 35 36 static inline int gfs2_is_writeback(const struct gfs2_inode *ip) 37 { 38 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 39 return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip); 40 } 41 42 static inline int gfs2_is_ordered(const struct gfs2_inode *ip) 43 { 44 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 45 return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip); 46 } 47 48 static inline int gfs2_is_dir(const struct gfs2_inode *ip) 49 { 50 return S_ISDIR(ip->i_inode.i_mode); 51 } 52 53 static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks) 54 { 55 inode->i_blocks = blocks << 56 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); 57 } 58 59 static inline u64 gfs2_get_inode_blocks(const struct inode *inode) 60 { 61 return inode->i_blocks >> 62 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); 63 } 64 65 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change) 66 { 67 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change)); 68 change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK); 69 inode->i_blocks += change; 70 } 71 72 static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr, 73 u64 no_formal_ino) 74 { 75 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino; 76 } 77 78 static inline void gfs2_inum_out(const struct gfs2_inode *ip, 79 struct gfs2_dirent *dent) 80 { 81 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); 82 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr); 83 } 84 85 static inline int gfs2_check_internal_file_size(struct inode *inode, 86 u64 minsize, u64 maxsize) 87 { 88 u64 size = i_size_read(inode); 89 if (size < minsize || size > maxsize) 90 goto err; 91 if (size & ((1 << inode->i_blkbits) - 1)) 92 goto err; 93 return 0; 94 err: 95 gfs2_consist_inode(GFS2_I(inode)); 96 return -EIO; 97 } 98 99 extern void gfs2_set_iop(struct inode *inode); 100 extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 101 u64 no_addr, u64 no_formal_ino); 102 extern void gfs2_process_unlinked_inode(struct super_block *sb, u64 no_addr); 103 extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr); 104 105 extern int gfs2_inode_refresh(struct gfs2_inode *ip); 106 107 extern int gfs2_dinode_dealloc(struct gfs2_inode *inode); 108 extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff); 109 extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 110 int is_root); 111 extern struct inode *gfs2_createi(struct gfs2_holder *ghs, 112 const struct qstr *name, 113 unsigned int mode, dev_t dev); 114 extern int gfs2_permission(struct inode *inode, int mask); 115 extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr); 116 extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); 117 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); 118 extern void gfs2_dinode_print(const struct gfs2_inode *ip); 119 120 extern const struct inode_operations gfs2_file_iops; 121 extern const struct inode_operations gfs2_dir_iops; 122 extern const struct inode_operations gfs2_symlink_iops; 123 extern const struct file_operations gfs2_file_fops_nolock; 124 extern const struct file_operations gfs2_dir_fops_nolock; 125 126 extern void gfs2_set_inode_flags(struct inode *inode); 127 128 #ifdef CONFIG_GFS2_FS_LOCKING_DLM 129 extern const struct file_operations gfs2_file_fops; 130 extern const struct file_operations gfs2_dir_fops; 131 132 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) 133 { 134 return sdp->sd_args.ar_localflocks; 135 } 136 #else /* Single node only */ 137 #define gfs2_file_fops gfs2_file_fops_nolock 138 #define gfs2_dir_fops gfs2_dir_fops_nolock 139 140 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) 141 { 142 return 1; 143 } 144 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ 145 146 #endif /* __INODE_DOT_H__ */ 147 148