Commit | Line | Data |
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dc9a2d80 | 1 | /* inode.h 4.18 82/10/31 */ |
d0064d3a BJ |
2 | |
3 | /* | |
a59abf09 BJ |
4 | * The I node is the focus of all file activity in UNIX. |
5 | * There is a unique inode allocated for each active file, | |
6 | * each current directory, each mounted-on file, text file, and the root. | |
7 | * An inode is 'named' by its dev/inumber pair. (iget/iget.c) | |
ad30fb67 | 8 | * Data in icommon is read in from permanent inode on volume. |
d0064d3a | 9 | */ |
ad30fb67 KM |
10 | |
11 | #define NDADDR 8 /* direct addresses in inode */ | |
12 | #define NIADDR 2 /* indirect addresses in inode */ | |
d0064d3a | 13 | |
a59abf09 | 14 | struct inode { |
69bd12a8 | 15 | struct inode *i_chain[2]; /* must be first */ |
b0954044 | 16 | u_short i_flag; |
3e27ef55 | 17 | u_short i_count; /* reference count */ |
d0064d3a | 18 | dev_t i_dev; /* device where inode resides */ |
b0954044 SL |
19 | u_short i_rdlockc; /* count of locked readers on inode */ |
20 | u_short i_wrlockc; /* count of locked writers on inode */ | |
d0064d3a | 21 | ino_t i_number; /* i number, 1-to-1 with device address */ |
ad30fb67 | 22 | struct fs *i_fs; /* file sys associated with this inode */ |
3e27ef55 | 23 | struct dquot *i_dquot; /* quota structure controlling this file */ |
d0064d3a | 24 | union { |
ad30fb67 KM |
25 | daddr_t if_lastr; /* last read (read-ahead) */ |
26 | struct socket *is_socket; | |
69bd12a8 RE |
27 | struct { |
28 | struct inode *if_freef; /* free list forward */ | |
29 | struct inode **if_freeb; /* free list back */ | |
30 | } i_fr; | |
d0064d3a | 31 | } i_un; |
ad30fb67 KM |
32 | struct icommon |
33 | { | |
34 | u_short ic_mode; /* 0: mode and type of file */ | |
35 | short ic_nlink; /* 2: number of links to file */ | |
36 | short ic_uid; /* 4: owner's user id */ | |
37 | short ic_gid; /* 6: owner's group id */ | |
38 | off_t ic_size; /* 8: number of bytes in file */ | |
39 | daddr_t ic_db[NDADDR]; /* 12: disk block addresses */ | |
40 | daddr_t ic_ib[NIADDR]; /* 44: indirect blocks */ | |
41 | time_t ic_atime; /* 52: time last accessed */ | |
42 | time_t ic_mtime; /* 56: time last modified */ | |
43 | time_t ic_ctime; /* 60: time created */ | |
44 | } i_ic; | |
d0064d3a BJ |
45 | }; |
46 | ||
ad30fb67 KM |
47 | struct dinode { |
48 | union { | |
49 | struct icommon di_icom; | |
50 | char di_size[64]; | |
51 | } di_un; | |
52 | }; | |
53 | ||
54 | #define i_mode i_ic.ic_mode | |
55 | #define i_nlink i_ic.ic_nlink | |
56 | #define i_uid i_ic.ic_uid | |
57 | #define i_gid i_ic.ic_gid | |
58 | #define i_size i_ic.ic_size | |
59 | #define i_db i_ic.ic_db | |
60 | #define i_ib i_ic.ic_ib | |
61 | #define i_atime i_ic.ic_atime | |
62 | #define i_mtime i_ic.ic_mtime | |
63 | #define i_ctime i_ic.ic_ctime | |
64 | #define i_rdev i_ic.ic_db[0] | |
65 | #define i_lastr i_un.if_lastr | |
66 | #define i_socket is_socket | |
69bd12a8 RE |
67 | #define i_forw i_chain[0] |
68 | #define i_back i_chain[1] | |
69 | #define i_freef i_un.i_fr.if_freef | |
70 | #define i_freeb i_un.i_fr.if_freeb | |
ad30fb67 KM |
71 | |
72 | #define di_ic di_un.di_icom | |
73 | #define di_mode di_ic.ic_mode | |
74 | #define di_nlink di_ic.ic_nlink | |
75 | #define di_uid di_ic.ic_uid | |
76 | #define di_gid di_ic.ic_gid | |
77 | #define di_size di_ic.ic_size | |
78 | #define di_db di_ic.ic_db | |
79 | #define di_ib di_ic.ic_ib | |
80 | #define di_atime di_ic.ic_atime | |
81 | #define di_mtime di_ic.ic_mtime | |
82 | #define di_ctime di_ic.ic_ctime | |
83 | #define di_rdev di_ic.ic_db[0] | |
84 | ||
d0064d3a | 85 | #ifdef KERNEL |
6e7edb25 BJ |
86 | struct inode *inode; /* the inode table itself */ |
87 | struct inode *inodeNINODE; /* the end of the inode table */ | |
88 | int ninode; /* number of slots in the table */ | |
d0064d3a | 89 | |
ad30fb67 | 90 | struct inode *rootdir; /* pointer to inode of root directory */ |
d0064d3a BJ |
91 | |
92 | struct inode *ialloc(); | |
d0064d3a BJ |
93 | struct inode *iget(); |
94 | struct inode *owner(); | |
95 | struct inode *maknode(); | |
96 | struct inode *namei(); | |
97 | #endif | |
98 | ||
99 | /* flags */ | |
02dd5a44 | 100 | #define ILOCKED 0x1 /* inode is locked */ |
b0954044 SL |
101 | #define IUPD 0x2 /* file has been modified */ |
102 | #define IACC 0x4 /* inode access time to be updated */ | |
103 | #define IMOUNT 0x8 /* inode is mounted on */ | |
104 | #define IWANT 0x10 /* some process waiting on lock */ | |
105 | #define ITEXT 0x20 /* inode is pure text prototype */ | |
106 | #define ICHG 0x40 /* inode has been changed */ | |
107 | #define IRDLOCK 0x80 /* file is read locked */ | |
108 | #define IWRLOCK 0x100 /* file is write locked */ | |
109 | #define ILWAIT 0x200 /* someone waiting on file lock */ | |
d0064d3a BJ |
110 | |
111 | /* modes */ | |
ad30fb67 KM |
112 | #define IFMT 0170000 /* type of file */ |
113 | #define IFCHR 0020000 /* character special */ | |
114 | #define IFDIR 0040000 /* directory */ | |
115 | #define IFBLK 0060000 /* block special */ | |
116 | #define IFREG 0100000 /* regular */ | |
117 | #define IFLNK 0120000 /* symbolic link */ | |
dc9a2d80 BJ |
118 | #define IFSOCK 0140000 /* socket */ |
119 | ||
ad30fb67 KM |
120 | #define ISUID 04000 /* set user id on execution */ |
121 | #define ISGID 02000 /* set group id on execution */ | |
122 | #define ISVTX 01000 /* save swapped text even after use */ | |
123 | #define IREAD 0400 /* read, write, execute permissions */ | |
124 | #define IWRITE 0200 | |
125 | #define IEXEC 0100 | |
02dd5a44 BJ |
126 | |
127 | #define ILOCK(ip) { \ | |
128 | while ((ip)->i_flag & ILOCKED) { \ | |
129 | (ip)->i_flag |= IWANT; \ | |
130 | sleep((caddr_t)(ip), PINOD); \ | |
131 | } \ | |
132 | (ip)->i_flag |= ILOCKED; \ | |
133 | } | |
134 | ||
135 | #define IUNLOCK(ip) { \ | |
136 | (ip)->i_flag &= ~ILOCKED; \ | |
137 | if ((ip)->i_flag&IWANT) { \ | |
138 | (ip)->i_flag &= ~IWANT; \ | |
139 | wakeup((caddr_t)(ip)); \ | |
140 | } \ | |
141 | } | |
142 | ||
143 | #define IUPDAT(ip, t1, t2, waitfor) { \ | |
144 | if (ip->i_flag&(IUPD|IACC|ICHG)) \ | |
145 | iupdat(ip, t1, t2, waitfor); \ | |
146 | } |