![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to inode.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Power 6/32 Unix Tahoe 4.2BSD] / cci / sys / h|
Return to inode.h CVS log | Up to [Power 6/32 Unix Tahoe 4.2BSD] / cci / sys / h |
1.1 root 1: /* inode.h 6.1 83/07/29 */
2: /* Documentation Block and Change history :
3: bernie 1/28/85 Add define for AUDITLOG.
4:
5: /*
6: * The I node is the focus of all file activity in UNIX.
7: * There is a unique inode allocated for each active file,
8: * each current directory, each mounted-on file, text file, and the root.
9: * An inode is 'named' by its dev/inumber pair. (iget/iget.c)
10: * Data in icommon is read in from permanent inode on volume.
11: */
12:
13: #define NDADDR 12 /* direct addresses in inode */
14: #define NIADDR 3 /* indirect addresses in inode */
15:
16: struct inode {
17: struct inode *i_chain[2]; /* must be first */
18: u_short i_flag;
19: u_short i_count; /* reference count */
20: dev_t i_dev; /* device where inode resides */
21: u_short i_shlockc; /* count of shared locks on inode */
22: u_short i_exlockc; /* count of exclusive locks on inode */
23: ino_t i_number; /* i number, 1-to-1 with device address */
24: struct fs *i_fs; /* file sys associated with this inode */
25: struct dquot *i_dquot; /* quota structure controlling this file */
26: union {
27: daddr_t if_lastr; /* last read (read-ahead) */
28: struct socket *is_socket;
29: struct {
30: struct inode *if_freef; /* free list forward */
31: struct inode **if_freeb; /* free list back */
32: } i_fr;
33: } i_un;
34: struct icommon
35: {
36: u_short ic_mode; /* 0: mode and type of file */
37: short ic_nlink; /* 2: number of links to file */
38: short ic_uid; /* 4: owner's user id */
39: short ic_gid; /* 6: owner's group id */
40: quad ic_size; /* 8: number of bytes in file */
41: time_t ic_atime; /* 16: time last accessed */
42: long ic_atspare;
43: time_t ic_mtime; /* 24: time last modified */
44: long ic_mtspare;
45: time_t ic_ctime; /* 32: last time inode changed */
46: long ic_ctspare;
47: daddr_t ic_db[NDADDR]; /* 40: disk block addresses */
48: daddr_t ic_ib[NIADDR]; /* 88: indirect blocks */
49: long ic_flags; /* 100: status, currently unused */
50: long ic_blocks; /* 104: blocks actually held */
51: long ic_spare[5]; /* 108: reserved, currently unused */
52: } i_ic;
53: };
54:
55: struct dinode {
56: union {
57: struct icommon di_icom;
58: char di_size[128];
59: } di_un;
60: };
61:
62: #define i_mode i_ic.ic_mode
63: #define i_nlink i_ic.ic_nlink
64: #define i_uid i_ic.ic_uid
65: #define i_gid i_ic.ic_gid
66: /* ugh! -- must be fixed */
67:
68: #define i_size i_ic.ic_size.val[0]
69:
70: #define i_db i_ic.ic_db
71: #define i_ib i_ic.ic_ib
72: #define i_atime i_ic.ic_atime
73: #define i_mtime i_ic.ic_mtime
74: #define i_ctime i_ic.ic_ctime
75: #define i_blocks i_ic.ic_blocks
76: #define i_rdev i_ic.ic_db[0]
77: #define i_lastr i_un.if_lastr
78: #define i_socket i_un.is_socket
79: #define i_forw i_chain[0]
80: #define i_back i_chain[1]
81: #define i_freef i_un.i_fr.if_freef
82: #define i_freeb i_un.i_fr.if_freeb
83:
84: #define di_ic di_un.di_icom
85: #define di_mode di_ic.ic_mode
86: #define di_nlink di_ic.ic_nlink
87: #define di_uid di_ic.ic_uid
88: #define di_gid di_ic.ic_gid
89:
90: #define di_size di_ic.ic_size.val[0]
91:
92: #define di_db di_ic.ic_db
93: #define di_ib di_ic.ic_ib
94: #define di_atime di_ic.ic_atime
95: #define di_mtime di_ic.ic_mtime
96: #define di_ctime di_ic.ic_ctime
97: #define di_rdev di_ic.ic_db[0]
98: #define di_blocks di_ic.ic_blocks
99:
100: #ifdef KERNEL
101: struct inode *inode; /* the inode table itself */
102: struct inode *inodeNINODE; /* the end of the inode table */
103: int ninode; /* number of slots in the table */
104:
105: struct inode *rootdir; /* pointer to inode of root directory */
106:
107: struct inode *ialloc();
108: struct inode *iget();
109: #ifdef notdef
110: struct inode *ifind();
111: #endif
112: struct inode *owner();
113: struct inode *maknode();
114: struct inode *namei();
115:
116: ino_t dirpref();
117: #endif
118:
119: /* flags */
120: #define ILOCKED 0x1 /* inode is locked */
121: #define IUPD 0x2 /* file has been modified */
122: #define IACC 0x4 /* inode access time to be updated */
123: #define IMOUNT 0x8 /* inode is mounted on */
124: #define IWANT 0x10 /* some process waiting on lock */
125: #define ITEXT 0x20 /* inode is pure text prototype */
126: #define ICHG 0x40 /* inode has been changed */
127: #define ISHLOCK 0x80 /* file has shared lock */
128: #define IEXLOCK 0x100 /* file has exclusive lock */
129: #define ILWAIT 0x200 /* someone waiting on file lock */
130:
131: /* modes */
132: #define IFMT 0170000 /* type of file */
133: #define IFCHR 0020000 /* character special */
134: #define IFDIR 0040000 /* directory */
135: #define IFBLK 0060000 /* block special */
136: #define IFREG 0100000 /* regular */
137: #define IFLNK 0120000 /* symbolic link */
138: #define IFSOCK 0140000 /* socket */
139:
140: #define ISUID 04000 /* set user id on execution */
141: #define ISGID 02000 /* set group id on execution */
142: #define ISVTX 01000 /* save swapped text even after use */
143: #define IREAD 0400 /* read, write, execute permissions */
144: #define IWRITE 0200
145: #define IEXEC 0100
146: /* ic_flags */
147: #define AUDLOG 0x01 /* audit trail logging bit */
148:
149: #define ILOCK(ip) { \
150: while ((ip)->i_flag & ILOCKED) { \
151: (ip)->i_flag |= IWANT; \
152: sleep((caddr_t)(ip), PINOD); \
153: } \
154: (ip)->i_flag |= ILOCKED; \
155: }
156:
157: #define IUNLOCK(ip) { \
158: (ip)->i_flag &= ~ILOCKED; \
159: if ((ip)->i_flag&IWANT) { \
160: (ip)->i_flag &= ~IWANT; \
161: wakeup((caddr_t)(ip)); \
162: } \
163: }
164:
165: #define IUPDAT(ip, t1, t2, waitfor) { \
166: if (ip->i_flag&(IUPD|IACC|ICHG)) \
167: iupdat(ip, t1, t2, waitfor); \
168: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.