+++ /dev/null
-/* Inode table. This table holds inodes that are currently in use. In some
- * cases they have been opened by an open() or creat() system call, in other
- * cases the file system itself needs the inode for one reason or another,
- * such as to search a directory for a path name.
- * The first part of the struct holds fields that are present on the
- * disk; the second part holds fields not present on the disk.
- * The disk inode part is also declared in "type.h" as 'd1_inode' for V1
- * file systems and 'd2_inode' for V2 file systems.
- */
-
-EXTERN struct inode {
- mode_t i_mode; /* file type, protection, etc. */
- nlink_t i_nlinks; /* how many links to this file */
- uid_t i_uid; /* user id of the file's owner */
- gid_t i_gid; /* group number */
- off_t i_size; /* current file size in bytes */
- time_t i_atime; /* time of last access (V2 only) */
- time_t i_mtime; /* when was file data last changed */
- time_t i_ctime; /* when was inode itself changed (V2 only)*/
- zone_t i_zone[V2_NR_TZONES]; /* zone numbers for direct, ind, and dbl ind */
-
- /* The following items are not present on the disk. */
- dev_t i_dev; /* which device is the inode on */
- ino_t i_num; /* inode number on its (minor) device */
- int i_count; /* # times inode used; 0 means slot is free */
- int i_ndzones; /* # direct zones (Vx_NR_DZONES) */
- int i_nindirs; /* # indirect zones per indirect block */
- struct super_block *i_sp; /* pointer to super block for inode's device */
- char i_dirt; /* CLEAN or DIRTY */
- char i_pipe; /* set to I_PIPE if pipe */
- char i_mount; /* this bit is set if file mounted on */
- char i_seek; /* set on LSEEK, cleared on READ/WRITE */
- char i_update; /* the ATIME, CTIME, and MTIME bits are here */
-} inode[NR_INODES];
-
-#define NIL_INODE (struct inode *) 0 /* indicates absence of inode slot */
-
-/* Field values. Note that CLEAN and DIRTY are defined in "const.h" */
-#define NO_PIPE 0 /* i_pipe is NO_PIPE if inode is not a pipe */
-#define I_PIPE 1 /* i_pipe is I_PIPE if inode is a pipe */
-#define NO_MOUNT 0 /* i_mount is NO_MOUNT if file not mounted on*/
-#define I_MOUNT 1 /* i_mount is I_MOUNT if file mounted on */
-#define NO_SEEK 0 /* i_seek = NO_SEEK if last op was not SEEK */
-#define ISEEK 1 /* i_seek = ISEEK if last op was SEEK */
+++ /dev/null
-/* Super block table. The root file system and every mounted file system
- * has an entry here. The entry holds information about the sizes of the bit
- * maps and inodes. The s_ninodes field gives the number of inodes available
- * for files and directories, including the root directory. Inode 0 is
- * on the disk, but not used. Thus s_ninodes = 4 means that 5 bits will be
- * used in the bit map, bit 0, which is always 1 and not used, and bits 1-4
- * for files and directories. The disk layout is:
- *
- * Item # blocks
- * boot block 1
- * super block 1 (offset 1kB)
- * inode map s_imap_blocks
- * zone map s_zmap_blocks
- * inodes (s_ninodes + 'inodes per block' - 1)/'inodes per block'
- * unused whatever is needed to fill out the current zone
- * data zones (s_zones - s_firstdatazone) << s_log_zone_size
- *
- * A super_block slot is free if s_dev == NO_DEV.
- */
-
-EXTERN struct super_block {
- ino_t s_ninodes; /* # usable inodes on the minor device */
- zone1_t s_nzones; /* total device size, including bit maps etc */
- short s_imap_blocks; /* # of blocks used by inode bit map */
- short s_zmap_blocks; /* # of blocks used by zone bit map */
- zone1_t s_firstdatazone; /* number of first data zone */
- short s_log_zone_size; /* log2 of blocks/zone */
- short s_pad; /* try to avoid compiler-dependent padding */
- off_t s_max_size; /* maximum file size on this device */
- zone_t s_zones; /* number of zones (replaces s_nzones in V2) */
- short s_magic; /* magic number to recognize super-blocks */
-
- /* The following items are valid on disk only for V3 and above */
-
- /* The block size in bytes. Minimum MIN_BLOCK SIZE. SECTOR_SIZE
- * multiple. If V1 or V2 filesystem, this should be
- * initialised to STATIC_BLOCK_SIZE. Maximum MAX_BLOCK_SIZE.
- */
- short s_pad2; /* try to avoid compiler-dependent padding */
- unsigned short s_block_size; /* block size in bytes. */
- char s_disk_version; /* filesystem format sub-version */
-
- /* The following items are only used when the super_block is in memory. */
- struct inode *s_isup; /* inode for root dir of mounted file sys */
- struct inode *s_imount; /* inode mounted on */
- unsigned s_inodes_per_block; /* precalculated from magic number */
- dev_t s_dev; /* whose super block is this? */
- int s_rd_only; /* set to 1 iff file sys mounted read only */
- int s_native; /* set to 1 iff not byte swapped file system */
- int s_version; /* file system version, zero means bad magic */
- int s_ndzones; /* # direct zones in an inode */
- int s_nindirs; /* # indirect zones per indirect block */
- bit_t s_isearch; /* inodes below this bit number are in use */
- bit_t s_zsearch; /* all zones below this bit number are in use*/
-} super_block[NR_SUPERS];
-
-#define NIL_SUPER (struct super_block *) 0
-#define IMAP 0 /* operating on the inode bit map */
-#define ZMAP 1 /* operating on the zone bit map */