*
* %sccs.include.redist.c%
*
- * @(#)inode.h 7.15 (Berkeley) %G%
+ * @(#)inode.h 7.29 (Berkeley) %G%
*/
-#ifdef KERNEL
-#include "../ufs/dinode.h"
-#else
-#include <ufs/dinode.h>
-#endif
+#include <ufs/ufs/dinode.h>
/*
- * 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 `struct dinode' is read in from permanent inode on volume.
+ * Theoretically, directories can be more than 2Gb in length,
+ * however, in practice this seems unlikely. So, we define
+ * the type doff_t as a long to keep down the cost of doing
+ * lookup on a 32-bit machine. If you are porting to a 64-bit
+ * architecture, you should make doff_t the same as off_t.
*/
+#define doff_t long
+/*
+ * The inode is used to describe each active (or recently active)
+ * file in the UFS filesystem. It is composed of two types of
+ * information. The first part is the information that is needed
+ * only while the file is active (such as the identity of the file
+ * and linkage to speed its lookup). The second part is the
+ * permannent meta-data associated with the file which is read
+ * in from the permanent dinode from long term storage when the
+ * file becomes active, and is put back when the file is no longer
+ * being used.
+ */
struct inode {
- struct inode *i_chain[2]; /* hash chain, MUST be first */
+ struct inode *i_next; /* hash chain forward */
+ struct inode **i_prev; /* hash chain back */
struct vnode *i_vnode; /* vnode associated with this inode */
struct vnode *i_devvp; /* vnode for block I/O */
u_long i_flag; /* see below */
dev_t i_dev; /* device where inode resides */
- ino_t i_number; /* i number, 1-to-1 with device address */
- struct fs *i_fs; /* file sys associated with this inode */
+ ino_t i_number; /* the identity of the inode */
+ union { /* associated filesystem */
+ struct fs *fs; /* FFS */
+ struct lfs *lfs; /* LFS */
+ } inode_u;
+#define i_fs inode_u.fs
+#define i_lfs inode_u.lfs
struct dquot *i_dquot[MAXQUOTAS]; /* pointer to dquot structures */
- struct lockf *i_lockf; /* Head of byte-level lock list */
- long i_diroff; /* offset in dir, where we found last entry */
- off_t i_endoff; /* end of useful stuff in directory */
- long i_spare0;
- long i_spare1;
- struct dinode i_din; /* the on-disk inode */
+ u_quad_t i_modrev; /* revision level for lease */
+ struct lockf *i_lockf; /* head of byte-level lock list */
+ pid_t i_lockholder; /* DEBUG: holder of inode lock */
+ pid_t i_lockwaiter; /* DEBUG: latest blocked for inode lock */
+ /*
+ * Side effects; used during directory lookup.
+ */
+ doff_t i_endoff; /* end of useful stuff in directory */
+ doff_t i_diroff; /* offset in dir, where we found last entry */
+ doff_t i_offset; /* offset of free space in directory */
+ long i_count; /* size of free slot in directory */
+ ino_t i_ino; /* inode number of found directory */
+ u_long i_reclen; /* size of found directory entry */
+ /*
+ * the on-disk dinode itself.
+ */
+ struct dinode i_din; /* the on-disk dinode */
+ long i_spare[12]; /* spares to round up to 256 bytes */
};
#define i_mode i_din.di_mode
#define i_nlink i_din.di_nlink
#define i_uid i_din.di_uid
#define i_gid i_din.di_gid
-#if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */
-#define i_size i_din.di_qsize.val[0]
-#else /* BYTE_ORDER == BIG_ENDIAN */
-#define i_size i_din.di_qsize.val[1]
-#endif
+#define i_size i_din.di_size
#define i_db i_din.di_db
#define i_ib i_din.di_ib
#define i_atime i_din.di_atime
#define i_mtime i_din.di_mtime
#define i_ctime i_din.di_ctime
#define i_blocks i_din.di_blocks
-#define i_rdev i_din.di_db[0]
+#define i_rdev i_din.di_rdev
+#define i_shortlink i_din.di_shortlink
#define i_flags i_din.di_flags
#define i_gen i_din.di_gen
-#define i_forw i_chain[0]
-#define i_back i_chain[1]
/* flags */
#define ILOCKED 0x0001 /* inode is locked */
#define ILWAIT 0x0400 /* someone waiting on file lock */
#ifdef KERNEL
-/*
- * Convert between inode pointers and vnode pointers
- */
+/* Convert between inode pointers and vnode pointers. */
#define VTOI(vp) ((struct inode *)(vp)->v_data)
#define ITOV(ip) ((ip)->i_vnode)
-/*
- * Convert between vnode types and inode formats
- */
-extern enum vtype iftovt_tab[];
-extern int vttoif_tab[];
-#define IFTOVT(mode) (iftovt_tab[((mode) & IFMT) >> 12])
-#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
-
-#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
-
-u_long nextgennumber; /* next generation number to assign */
-
-extern ino_t dirpref();
-
-/*
- * Lock and unlock inodes.
- */
+/* Lock and unlock inodes. */
#ifdef notdef
#define ILOCK(ip) { \
while ((ip)->i_flag & ILOCKED) { \
} \
}
#else
-#define ILOCK(ip) ilock(ip)
-#define IUNLOCK(ip) iunlock(ip)
+#define ILOCK(ip) ufs_ilock(ip)
+#define IUNLOCK(ip) ufs_iunlock(ip)
#endif
-#define IUPDAT(ip, t1, t2, waitfor) { \
- if (ip->i_flag&(IUPD|IACC|ICHG|IMOD)) \
- (void) iupdat(ip, t1, t2, waitfor); \
-}
-
#define ITIMES(ip, t1, t2) { \
if ((ip)->i_flag&(IUPD|IACC|ICHG)) { \
(ip)->i_flag |= IMOD; \
if ((ip)->i_flag&IACC) \
- (ip)->i_atime = (t1)->tv_sec; \
- if ((ip)->i_flag&IUPD) \
- (ip)->i_mtime = (t2)->tv_sec; \
+ (ip)->i_atime.ts_sec = (t1)->tv_sec; \
+ if ((ip)->i_flag&IUPD) { \
+ (ip)->i_mtime.ts_sec = (t2)->tv_sec; \
+ (ip)->i_modrev++; \
+ } \
if ((ip)->i_flag&ICHG) \
- (ip)->i_ctime = time.tv_sec; \
+ (ip)->i_ctime.ts_sec = time.tv_sec; \
(ip)->i_flag &= ~(IACC|IUPD|ICHG); \
} \
}
-/*
- * This overlays the fid sturcture (see mount.h)
- */
+/* This overlays the fid structure (see mount.h). */
struct ufid {
u_short ufid_len; /* length of structure */
u_short ufid_pad; /* force long alignment */
ino_t ufid_ino; /* file number (ino) */
long ufid_gen; /* generation number */
};
-#endif
+#endif /* KERNEL */