-/* dinode.h 3.1 %H% */
+/* dinode.h 4.20 82/11/13 */
/*
- * The I node is the focus of all
- * file activity in unix. There is a unique
- * inode allocated for each active file,
- * each current directory, each mounted-on
- * file, text file, and the root. An inode is 'named'
- * by its dev/inumber pair. (iget/iget.c)
- * Data, from mode on, is read in
- * from permanent inode on volume.
+ * The I node is the focus of all file activity in UNIX.
+ * There is a unique inode allocated for each active file,
+ * each current directory, each mounted-on file, text file, and the root.
+ * An inode is 'named' by its dev/inumber pair. (iget/iget.c)
+ * Data in icommon is read in from permanent inode on volume.
*/
-#define NADDR 13
-
-#define NINDEX 15
-struct group
-{
- short g_state;
- char g_index;
- char g_rot;
- struct group *g_group;
- struct inode *g_inode;
- struct file *g_file;
- short g_rotmask;
- short g_datq;
- struct chan *g_chans[NINDEX];
-};
-struct inode
-{
- char i_flag;
- char i_count; /* reference count */
+#define NDADDR 12 /* direct addresses in inode */
+#define NIADDR 3 /* indirect addresses in inode */
+
+struct inode {
+ struct inode *i_chain[2]; /* must be first */
+ u_short i_flag;
+ u_short i_count; /* reference count */
dev_t i_dev; /* device where inode resides */
+ u_short i_shlockc; /* count of shared locks on inode */
+ u_short i_exlockc; /* count of exclusive locks on inode */
ino_t i_number; /* i number, 1-to-1 with device address */
- unsigned short i_mode;
- short i_nlink; /* directory entries */
- short i_uid; /* owner */
- short i_gid; /* group of owner */
- off_t i_size; /* size of file */
+ struct fs *i_fs; /* file sys associated with this inode */
+ struct dquot *i_dquot; /* quota structure controlling this file */
union {
- struct {
- daddr_t i_addr[NADDR]; /* if normal file/directory */
- daddr_t i_lastr; /* last logical block read (for read-ahead) */
- };
- struct {
- daddr_t i_rdev; /* i_addr[0] */
- struct group i_group; /* multiplexor group file */
- };
+ daddr_t if_lastr; /* last read (read-ahead) */
+ struct socket *is_socket;
+ struct {
+ struct inode *if_freef; /* free list forward */
+ struct inode **if_freeb; /* free list back */
+ } i_fr;
} i_un;
- short i_vfdcnt; /* number of fd's vreading this inode */
- short i_hlink; /* link in hash chain (iget/iput/ifind) */
+ struct icommon
+ {
+ u_short ic_mode; /* 0: mode and type of file */
+ short ic_nlink; /* 2: number of links to file */
+ short ic_uid; /* 4: owner's user id */
+ short ic_gid; /* 6: owner's group id */
+ quad ic_size; /* 8: number of bytes in file */
+ time_t ic_atime; /* 16: time last accessed */
+ long ic_atspare;
+ time_t ic_mtime; /* 24: time last modified */
+ long ic_mtspare;
+ time_t ic_ctime; /* 32: time created */
+ long ic_ctspare;
+ daddr_t ic_db[NDADDR]; /* 40: disk block addresses */
+ daddr_t ic_ib[NIADDR]; /* 88: indirect blocks */
+ long ic_flags; /* 100: status, currently unused */
+ long ic_spare[6]; /* 104: reserved, currently unused */
+ } i_ic;
+};
+
+struct dinode {
+ union {
+ struct icommon di_icom;
+ char di_size[128];
+ } di_un;
};
+#define i_mode i_ic.ic_mode
+#define i_nlink i_ic.ic_nlink
+#define i_uid i_ic.ic_uid
+#define i_gid i_ic.ic_gid
+#define i_size i_ic.ic_size.val[0]
+#define i_db i_ic.ic_db
+#define i_ib i_ic.ic_ib
+#define i_atime i_ic.ic_atime
+#define i_mtime i_ic.ic_mtime
+#define i_ctime i_ic.ic_ctime
+#define i_rdev i_ic.ic_db[0]
+#define i_lastr i_un.if_lastr
+#define i_socket i_un.is_socket
+#define i_forw i_chain[0]
+#define i_back i_chain[1]
+#define i_freef i_un.i_fr.if_freef
+#define i_freeb i_un.i_fr.if_freeb
+
+#define di_ic di_un.di_icom
+#define di_mode di_ic.ic_mode
+#define di_nlink di_ic.ic_nlink
+#define di_uid di_ic.ic_uid
+#define di_gid di_ic.ic_gid
+#define di_size di_ic.ic_size.val[0]
+#define di_db di_ic.ic_db
+#define di_ib di_ic.ic_ib
+#define di_atime di_ic.ic_atime
+#define di_mtime di_ic.ic_mtime
+#define di_ctime di_ic.ic_ctime
+#define di_rdev di_ic.ic_db[0]
+
#ifdef KERNEL
-extern struct inode inode[]; /* The inode table itself */
+struct inode *inode; /* the inode table itself */
+struct inode *inodeNINODE; /* the end of the inode table */
+int ninode; /* number of slots in the table */
-struct inode *rootdir; /* pointer to inode of root directory */
-struct inode *mpxip; /* mpx virtual inode */
+struct inode *rootdir; /* pointer to inode of root directory */
struct inode *ialloc();
-struct inode *ifind();
struct inode *iget();
+#ifdef notdef
+struct inode *ifind();
+#endif
struct inode *owner();
struct inode *maknode();
struct inode *namei();
+
+ino_t dirpref();
#endif
/* flags */
-#define ILOCK 01 /* inode is locked */
-#define IUPD 02 /* file has been modified */
-#define IACC 04 /* inode access time to be updated */
-#define IMOUNT 010 /* inode is mounted on */
-#define IWANT 020 /* some process waiting on lock */
-#define ITEXT 040 /* inode is pure text prototype */
-#define ICHG 0100 /* inode has been changed */
+#define ILOCKED 0x1 /* inode is locked */
+#define IUPD 0x2 /* file has been modified */
+#define IACC 0x4 /* inode access time to be updated */
+#define IMOUNT 0x8 /* inode is mounted on */
+#define IWANT 0x10 /* some process waiting on lock */
+#define ITEXT 0x20 /* inode is pure text prototype */
+#define ICHG 0x40 /* inode has been changed */
+#define ISHLOCK 0x80 /* file has shared lock */
+#define IEXLOCK 0x100 /* file has exclusive lock */
+#define ILWAIT 0x200 /* someone waiting on file lock */
/* modes */
-#define IFMT 0170000 /* type of file */
-#define IFDIR 0040000 /* directory */
-#define IFCHR 0020000 /* character special */
-#define IFBLK 0060000 /* block special */
-#define IFREG 0100000 /* regular */
-#define IFMPC 0030000 /* multiplexed char special */
-#define IFMPB 0070000 /* multiplexed block special */
-#define ISUID 04000 /* set user id on execution */
-#define ISGID 02000 /* set group id on execution */
-#define ISVTX 01000 /* save swapped text even after use */
-#define IREAD 0400 /* read, write, execute permissions */
-#define IWRITE 0200
-#define IEXEC 0100
+#define IFMT 0170000 /* type of file */
+#define IFCHR 0020000 /* character special */
+#define IFDIR 0040000 /* directory */
+#define IFBLK 0060000 /* block special */
+#define IFREG 0100000 /* regular */
+#define IFLNK 0120000 /* symbolic link */
+#define IFSOCK 0140000 /* socket */
+
+#define ISUID 04000 /* set user id on execution */
+#define ISGID 02000 /* set group id on execution */
+#define ISVTX 01000 /* save swapped text even after use */
+#define IREAD 0400 /* read, write, execute permissions */
+#define IWRITE 0200
+#define IEXEC 0100
+
+#define ILOCK(ip) { \
+ while ((ip)->i_flag & ILOCKED) { \
+ (ip)->i_flag |= IWANT; \
+ sleep((caddr_t)(ip), PINOD); \
+ } \
+ (ip)->i_flag |= ILOCKED; \
+}
+
+#define IUNLOCK(ip) { \
+ (ip)->i_flag &= ~ILOCKED; \
+ if ((ip)->i_flag&IWANT) { \
+ (ip)->i_flag &= ~IWANT; \
+ wakeup((caddr_t)(ip)); \
+ } \
+}
+
+#define IUPDAT(ip, t1, t2, waitfor) { \
+ if (ip->i_flag&(IUPD|IACC|ICHG)) \
+ iupdat(ip, t1, t2, waitfor); \
+}