lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 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 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, |
| 100 | u64 no_addr, u64 no_formal_ino, |
| 101 | int non_block); |
| 102 | extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, |
| 103 | u64 *no_formal_ino, |
| 104 | unsigned int blktype); |
| 105 | extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int nonblock); |
| 106 | |
| 107 | extern int gfs2_inode_refresh(struct gfs2_inode *ip); |
| 108 | |
| 109 | extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
| 110 | int is_root); |
| 111 | extern int gfs2_permission(struct inode *inode, int mask); |
| 112 | extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr); |
| 113 | extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); |
| 114 | extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); |
| 115 | |
| 116 | extern const struct inode_operations gfs2_file_iops; |
| 117 | extern const struct inode_operations gfs2_dir_iops; |
| 118 | extern const struct inode_operations gfs2_symlink_iops; |
| 119 | extern const struct file_operations gfs2_file_fops_nolock; |
| 120 | extern const struct file_operations gfs2_dir_fops_nolock; |
| 121 | |
| 122 | extern void gfs2_set_inode_flags(struct inode *inode); |
| 123 | |
| 124 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM |
| 125 | extern const struct file_operations gfs2_file_fops; |
| 126 | extern const struct file_operations gfs2_dir_fops; |
| 127 | |
| 128 | static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) |
| 129 | { |
| 130 | return sdp->sd_args.ar_localflocks; |
| 131 | } |
| 132 | #else /* Single node only */ |
| 133 | #define gfs2_file_fops gfs2_file_fops_nolock |
| 134 | #define gfs2_dir_fops gfs2_dir_fops_nolock |
| 135 | |
| 136 | static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) |
| 137 | { |
| 138 | return 1; |
| 139 | } |
| 140 | #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ |
| 141 | |
| 142 | #endif /* __INODE_DOT_H__ */ |
| 143 | |