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 char *buf, loff_t *pos, unsigned size); 21 extern void gfs2_set_aops(struct inode *inode); 22 23 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip) 24 { 25 return !ip->i_height; 26 } 27 28 static inline int gfs2_is_jdata(const struct gfs2_inode *ip) 29 { 30 return ip->i_diskflags & GFS2_DIF_JDATA; 31 } 32 33 static inline int gfs2_is_writeback(const struct gfs2_inode *ip) 34 { 35 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 36 return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip); 37 } 38 39 static inline int gfs2_is_ordered(const struct gfs2_inode *ip) 40 { 41 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 42 return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip); 43 } 44 45 static inline int gfs2_is_dir(const struct gfs2_inode *ip) 46 { 47 return S_ISDIR(ip->i_inode.i_mode); 48 } 49 50 static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks) 51 { 52 inode->i_blocks = blocks << 53 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); 54 } 55 56 static inline u64 gfs2_get_inode_blocks(const struct inode *inode) 57 { 58 return inode->i_blocks >> 59 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); 60 } 61 62 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change) 63 { 64 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change)); 65 change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK); 66 inode->i_blocks += change; 67 } 68 69 static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr, 70 u64 no_formal_ino) 71 { 72 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino; 73 } 74 75 static inline void gfs2_inum_out(const struct gfs2_inode *ip, 76 struct gfs2_dirent *dent) 77 { 78 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); 79 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr); 80 } 81 82 static inline int gfs2_check_internal_file_size(struct inode *inode, 83 u64 minsize, u64 maxsize) 84 { 85 u64 size = i_size_read(inode); 86 if (size < minsize || size > maxsize) 87 goto err; 88 if (size & (BIT(inode->i_blkbits) - 1)) 89 goto err; 90 return 0; 91 err: 92 gfs2_consist_inode(GFS2_I(inode)); 93 return -EIO; 94 } 95 96 extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 97 u64 no_addr, u64 no_formal_ino, 98 unsigned int blktype); 99 extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 100 u64 *no_formal_ino, 101 unsigned int blktype); 102 103 extern int gfs2_inode_refresh(struct gfs2_inode *ip); 104 105 extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 106 int is_root); 107 extern int gfs2_permission(struct inode *inode, int mask); 108 extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr); 109 extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); 110 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); 111 extern int gfs2_open_common(struct inode *inode, struct file *file); 112 extern loff_t gfs2_seek_data(struct file *file, loff_t offset); 113 extern loff_t gfs2_seek_hole(struct file *file, loff_t offset); 114 115 extern const struct inode_operations gfs2_file_iops; 116 extern const struct inode_operations gfs2_dir_iops; 117 extern const struct inode_operations gfs2_symlink_iops; 118 extern const struct file_operations gfs2_file_fops_nolock; 119 extern const struct file_operations gfs2_dir_fops_nolock; 120 121 extern void gfs2_set_inode_flags(struct inode *inode); 122 123 #ifdef CONFIG_GFS2_FS_LOCKING_DLM 124 extern const struct file_operations gfs2_file_fops; 125 extern const struct file_operations gfs2_dir_fops; 126 127 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) 128 { 129 return sdp->sd_args.ar_localflocks; 130 } 131 #else /* Single node only */ 132 #define gfs2_file_fops gfs2_file_fops_nolock 133 #define gfs2_dir_fops gfs2_dir_fops_nolock 134 135 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) 136 { 137 return 1; 138 } 139 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ 140 141 #endif /* __INODE_DOT_H__ */ 142 143