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