iso9660fs: rewrite ISO 9660 file system server

iso9660fs has been cleaned up and debugged. It now supports:
 * ISO 9660 Level 3,
 * System Use Sharing Protocol (SUSP),
 * Rock Ridge Interchange Protocol (RRIP).

The following Rock Ridge features are supported:
 * POSIX file attributes (PX),
 * POSIX device number (PN),
 * Symbolic links (SL),
 * Alternate file name (NM),
 * Timestamps in 7-byte format (TF).

Change-Id: Ib227411bdda5bc10a957b27ad05fafdc95eca35f
This commit is contained in:
Jean-Baptiste Boric 2014-08-03 19:24:51 +02:00 committed by David van Moolenbroek
parent 1858c65d72
commit 3e08d38e8e
21 changed files with 1975 additions and 1465 deletions

View file

@ -1,11 +1,11 @@
# Makefile for ISO9660 fs
PROG= isofs
SRCS= main.c table.c mount.c super.c inode.c \
utility.c misc.c path.c read.c stadir.c
link.c utility.c misc.c path.c read.c susp.c susp_rock_ridge.c stadir.c
DPADD+= ${LIBBDEV} ${LIBSYS}
LDADD+= -lbdev -lsys -lc -lminixfs
CPPFLAGS+= -DNR_BUFS=100
CPPFLAGS+= -DNR_BUFS=100 -Wall
.include <minix.service.mk>

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@ -1,8 +0,0 @@
#include <sys/dirent.h>
#define b_data(bp) ((char *) (bp->data))
/* A block is free if b_dev == NO_DEV. */
#define INODE_BLOCK 0 /* inode block */
#define DIRECTORY_BLOCK 1 /* directory block */

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@ -1,17 +1,10 @@
#define GETDENTS_BUFSIZ 261
#define GETDENTS_BUFSIZ 1024
#define ISO9660_STANDARD_ID "CD001" /* Standard code for ISO9660 file systems */
#define NR_DIR_RECORDS 256 /* Number of dir records to use at the same
* time. */
#define NR_ATTR_RECS 256 /* Number of extended attributes that is
* possible to use at the same time */
/* #define NR_ID_INODES 1024 */ /* The ISO9660 doesn't save the inode numbers.
* There is a table that assign to every inode
* a particular id. This number defines the
* maximum number of ids the filesystem can
* handle */
#define NR_INODE_RECORDS 64
#define NR_DIR_EXTENT_RECORDS NR_INODE_RECORDS * 16
#define NO_ADDRESS (-1) /* Error constants */
#define NO_FREE_INODES (-1)
@ -19,12 +12,8 @@
#define PATH_PENULTIMATE 001 /* parse_path stops at last but one name */
#define PATH_NONSYMBOLIC 004 /* parse_path scans final name if symbolic */
#define DIR_ENTRY_SIZE sizeof (struct direct)
#define NR_DIR_ENTRIES(b) ((b)/DIR_ENTRY_SIZE)
/* Below there are constant of the ISO9660 fs */
#define ISO9660_SUPER_BLOCK_POSITION (32768)
#define ISO9660_SUPER_BLOCK_POSITION 32768
#define ISO9660_MIN_BLOCK_SIZE 2048
/* SIZES FIELDS ISO9660 STRUCTURES */
@ -42,10 +31,8 @@
#define ISO9660_SIZE_ABSTRACT_FILE_ID 37
#define ISO9660_SIZE_BIBL_FILE_ID 37
#define ISO9660_SIZE_VOL_CRE_DATE 17
#define ISO9660_SIZE_VOL_MOD_DATE 17
#define ISO9660_SIZE_VOL_EXP_DATE 17
#define ISO9660_SIZE_VOL_EFF_DATE 17
#define ISO9660_SIZE_DATE17 17
#define ISO9660_SIZE_DATE7 7
#define ISO9660_SIZE_ESCAPE_SQC 32
#define ISO9660_SIZE_PART_ID 32
@ -54,9 +41,11 @@
/* maximum size of length of name file used in dir records */
#define ISO9660_MAX_FILE_ID_LEN 32
#define ISO9660_RRIP_MAX_FILE_ID_LEN 256
#define END_OF_FILE (-104) /* eof detected */
/* Miscellaneous constants */
#define SYS_UID ((uid_t) 0) /* uid_t for processes PM and INIT */
#define SYS_GID ((gid_t) 0) /* gid_t for processes PM and INIT */

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@ -4,6 +4,8 @@
#define EXTERN
#endif
#include <minix/optset.h>
/* The following variables are used for returning results to the caller. */
EXTERN int err_code; /* temporary storage for error number */
@ -12,8 +14,7 @@ EXTERN int rdwt_err; /* status of last disk i/o request */
EXTERN int(*fs_call_vec[]) (void);
EXTERN message fs_m_in; /* contains the input message of the request */
EXTERN message fs_m_out; /* contains the output message of the
* request */
EXTERN message fs_m_out; /* contains the output message of the request */
EXTERN int FS_STATE;
EXTERN uid_t caller_uid;
@ -31,3 +32,4 @@ EXTERN int unmountdone;
EXTERN dev_t fs_dev; /* the device that is handled by this FS proc */
EXTERN char fs_dev_label[16]; /* Name of the device driver that is handled */
EXTERN struct opt opt; /* global mount options */

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@ -10,11 +10,13 @@
#include <signal.h>
#include <unistd.h>
#include <stdio.h>
#include <minix/callnr.h>
#include <minix/config.h>
#include <minix/type.h>
#include <minix/const.h>
#include <minix/com.h>
#include <minix/log.h>
#include <minix/syslib.h>
#include <minix/sysutil.h>
#include <minix/bitmap.h>
@ -24,8 +26,15 @@
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <time.h>
#include <sys/param.h>
#include <sys/syslimits.h>
#include <sys/types.h>
#include <sys/dirent.h>
#define b_data(bp) ((char *) (bp->data))
#include "proto.h"
#include "super.h"
#include "glo.h"

View file

@ -1,296 +1,384 @@
/* This file contains all the function that handle the dir records
* (inodes) for the ISO9660 filesystem.*/
/*
* This file contains all the function that handle the dir records
* (inodes) for the ISO9660 filesystem.
*/
#include "inc.h"
#include "buf.h"
#include <minix/vfsif.h>
#include <sys/stat.h>
static struct inode inodes[NR_INODE_RECORDS];
static struct buf* fetch_inode(struct dir_extent *extent, size_t *offset);
/*===========================================================================*
* fs_putnode *
*===========================================================================*/
int fs_putnode()
{
/* Find the inode specified by the request message and decrease its counter. */
int count;
struct dir_record *dir = NULL;
/*
* Find the inode specified by the request message and decrease its
* counter.
*/
int count = fs_m_in.m_vfs_fs_putnode.count;
struct inode *i_node = find_inode(fs_m_in.m_vfs_fs_putnode.inode);
dir = get_dir_record(fs_m_in.m_vfs_fs_putnode.inode);
release_dir_record(dir);
count = fs_m_in.m_vfs_fs_putnode.count;
if (count <= 0) return(EINVAL);
if (count > dir->d_count) {
printf("put_inode: count too high: %d > %d\n", count, dir->d_count);
return(EINVAL);
if (i_node == NULL) {
printf("put_inode: trying to free unused inode\n");
panic("fs_putnode failed");
}
if (count <= 0) {
printf("put_inode: bad value for count: %d\n", count);
panic("fs_putnode failed");
}
if (count > i_node->i_count) {
printf("put_inode: count too high: %d > %d\n", count, i_node->i_count);
panic("fs_putnode failed");
}
if (dir->d_count > 1)
dir->d_count = dir->d_count - count + 1;/*Keep at least one reference*/
release_dir_record(dir); /* Actual inode release, might be last reference */
return(OK);
i_node->i_count -= count - 1;
put_inode(i_node);
return OK;
}
/*===========================================================================*
* release_dir_record *
*===========================================================================*/
int release_dir_record(dir)
struct dir_record *dir;
struct inode* alloc_inode()
{
/* Release a dir record (decrement the counter) */
if (dir == NULL)
return(EINVAL);
/*
* Return a free inode from the pool.
*/
static int i;
int end = i;
struct inode *i_node;
if (--dir->d_count == 0) {
if (dir->ext_attr != NULL)
dir->ext_attr->count = 0;
dir->ext_attr = NULL;
dir->d_mountpoint = FALSE;
i = (i + 1) % NR_INODE_RECORDS;
do {
i_node = &inodes[i];
dir->d_prior = NULL;
if (dir->d_next != NULL)
release_dir_record(dir);
dir->d_next = NULL;
}
return(OK);
if (i_node->i_count == 0) {
free_extent(i_node->extent);
memset(i_node, 0, sizeof(*i_node));
i_node->i_count = 1;
return i_node;
}
i = (i + 1) % NR_INODE_RECORDS;
}
while(i != end);
/*===========================================================================*
* get_free_dir_record *
*===========================================================================*/
struct dir_record *get_free_dir_record(void)
panic("No free inodes in cache");
}
struct inode* find_inode(ino_t i)
{
/* Get a free dir record */
struct dir_record *dir;
/* Get inode from cache. */
int cpt;
struct inode *i_node;
for(dir = dir_records; dir < &dir_records[NR_ATTR_RECS]; dir++) {
if (dir->d_count == 0) { /* The record is free */
dir->d_count = 1; /* Set count to 1 */
dir->ext_attr = NULL;
return(dir);
}
if (i == 0)
return NULL;
for (cpt = 0; cpt < NR_INODE_RECORDS; cpt++) {
i_node = &inodes[cpt];
if ((i_node->i_stat.st_ino == i) && (i_node->i_count > 0))
return i_node;
}
return(NULL);
return NULL;
}
/*===========================================================================*
* get_dir_record *
*===========================================================================*/
struct dir_record *get_dir_record(id_dir_record)
ino_t id_dir_record;
struct inode* get_inode(ino_t i)
{
struct dir_record *dir = NULL;
u32_t address;
int i;
struct inode *i_node;
struct dir_extent *extent;
/* Search through the cache if the inode is still present */
for(i = 0; i < NR_DIR_RECORDS && dir == NULL; ++i) {
if (dir_records[i].d_ino_nr == id_dir_record
&& dir_records[i].d_count > 0) {
dir = dir_records + i;
dir->d_count++;
}
if (i == 0)
return NULL;
/* Try to get inode from cache. */
i_node = find_inode(i);
if (i_node != NULL) {
dup_inode(i_node);
return i_node;
}
if (dir == NULL) {
address = (u32_t)id_dir_record;
dir = load_dir_record_from_disk(address);
/*
* Inode wasn't in cache, try to load it.
* FIXME: a fake extent of one logical block is created for
* read_inode(). Reading a inode this way could be problematic if
* additional extents are stored behind the block boundary.
*/
i_node = alloc_inode();
extent = alloc_extent();
extent->location = i / v_pri.logical_block_size_l;
extent->length = 1;
if (read_inode(i_node, extent, i % v_pri.logical_block_size_l, NULL) != OK) {
free_extent(extent);
put_inode(i_node);
return NULL;
}
if (dir == NULL) return(NULL);
return(dir);
free_extent(extent);
return i_node;
}
/*===========================================================================*
* get_free_ext_attr *
*===========================================================================*/
struct ext_attr_rec *get_free_ext_attr(void) {
/* Get a free extended attribute structure */
struct ext_attr_rec *dir;
for(dir = ext_attr_recs; dir < &ext_attr_recs[NR_ATTR_RECS]; dir++) {
if (dir->count == 0) { /* The record is free */
dir->count = 1;
return(dir);
}
}
return(NULL);
}
/*===========================================================================*
* create_ext_attr *
*===========================================================================*/
int create_ext_attr(struct ext_attr_rec *ext,char *buffer)
void put_inode(struct inode *i_node)
{
/* Fill an extent structure from the data read on the device */
if (ext == NULL) return(EINVAL);
if (i_node == NULL)
return;
/* In input we have a stream of bytes that are physically read from the
* device. This stream of data is copied to the data structure. */
memcpy(&ext->own_id,buffer,sizeof(u32_t));
memcpy(&ext->group_id,buffer + 4,sizeof(u32_t));
memcpy(&ext->permissions,buffer + 8,sizeof(u16_t));
memcpy(&ext->file_cre_date,buffer + 10,ISO9660_SIZE_VOL_CRE_DATE);
memcpy(&ext->file_mod_date,buffer + 27,ISO9660_SIZE_VOL_MOD_DATE);
memcpy(&ext->file_exp_date,buffer + 44,ISO9660_SIZE_VOL_EXP_DATE);
memcpy(&ext->file_eff_date,buffer + 61,ISO9660_SIZE_VOL_EFF_DATE);
memcpy(&ext->rec_format,buffer + 78,sizeof(u8_t));
memcpy(&ext->rec_attrs,buffer + 79,sizeof(u8_t));
memcpy(&ext->rec_length,buffer + 80,sizeof(u32_t));
memcpy(&ext->system_id,buffer + 84,ISO9660_SIZE_SYS_ID);
memcpy(&ext->system_use,buffer + 116,ISO9660_SIZE_SYSTEM_USE);
memcpy(&ext->ext_attr_rec_ver,buffer + 180,sizeof(u8_t));
memcpy(&ext->len_esc_seq,buffer + 181,sizeof(u8_t));
if (i_node->i_count <= 0)
panic("put_inode: i_count already below 1: %d", i_node->i_count);
return(OK);
i_node->i_count--;
}
/*===========================================================================*
* create_ext_attr *
*===========================================================================*/
int create_dir_record(dir,buffer,address)
struct dir_record *dir;
char *buffer;
u32_t address;
void dup_inode(struct inode *i_node)
{
/* Fills a dir record structure from the data read on the device */
/* If the flag assign id is active it will return the id associated;
* otherwise it will return OK. */
short size;
if (i_node == NULL)
panic("dup_inode: trying to duplicate NULL inode");
size = buffer[0];
if (dir == NULL) return(EINVAL);
/* The data structure dir record is filled with the stream of data
* that is read. */
dir->length = size;
dir->ext_attr_rec_length = *((u8_t*)buffer + 1);
memcpy(&dir->loc_extent_l,buffer + 2,sizeof(u32_t));
memcpy(&dir->loc_extent_m,buffer + 6,sizeof(u32_t));
memcpy(&dir->data_length_l,buffer + 10,sizeof(u32_t));
memcpy(&dir->data_length_m,buffer + 14,sizeof(u32_t));
memcpy(dir->rec_date,buffer + 18, sizeof(dir->rec_date));
dir->file_flags = *((u8_t*)buffer + 25);
dir->file_unit_size = *((u8_t*)buffer + 26);
dir->inter_gap_size = *((u8_t*)buffer + 27);
dir->vol_seq_number = *((u8_t*)buffer + 28);
dir->length_file_id = *((u8_t*)buffer + 32);
memcpy(dir->file_id,buffer + 33,dir->length_file_id);
dir->ext_attr = NULL;
/* set memory attrs */
if ((dir->file_flags & D_TYPE) == D_DIRECTORY)
dir->d_mode = I_DIRECTORY;
else
dir->d_mode = I_REGULAR;
/* Set permission to read only. Equal for all users. */
dir->d_mode |= R_BIT | X_BIT;
dir->d_mode |= R_BIT << 3 | X_BIT << 3;
dir->d_mode |= R_BIT << 6 | X_BIT << 6;
dir->d_mountpoint = FALSE;
dir->d_next = NULL;
dir->d_prior = NULL;
dir->d_file_size = dir->data_length_l;
/* Set physical address of the dir record */
dir->d_phy_addr = address;
dir->d_ino_nr = address;
return(OK);
i_node->i_count++;
}
/*===========================================================================*
* load_dir_record_from_disk *
*===========================================================================*/
struct dir_record *load_dir_record_from_disk(address)
u32_t address;
static struct buf* fetch_inode(struct dir_extent *extent, size_t *offset)
{
/* This function load a particular dir record from a specific address
* on the device */
int block_nr, offset, block_size, new_pos;
struct iso9660_dir_record *dir_rec;
struct buf *bp;
struct dir_record *dir, *dir_next, *dir_parent, *dir_tmp;
char name[NAME_MAX + 1];
char old_name[NAME_MAX + 1];
u32_t new_address, size;
block_size = v_pri.logical_block_size_l; /* Block size */
block_nr = address / block_size; /* Block number from the address */
offset = address % block_size; /* Offset starting from the block */
/*
* Directory entries aren't allowed to cross a logical block boundary in
* ISO 9660, so we keep searching until we find something or reach the
* end of the extent.
*/
bp = read_extent_block(extent, *offset / v_pri.logical_block_size_l);
while (bp != NULL) {
dir_rec = (struct iso9660_dir_record*)(b_data(bp) + *offset %
v_pri.logical_block_size_l);
if (dir_rec->length == 0) {
*offset -= *offset % v_pri.logical_block_size_l;
*offset += v_pri.logical_block_size_l;
}
else {
break;
}
bp = get_block(block_nr); /* Read the block from the device */
put_block(bp);
bp = read_extent_block(extent, *offset / v_pri.logical_block_size_l);
}
return bp;
}
int read_inode(struct inode *i_node, struct dir_extent *extent, size_t offset,
size_t *new_offset)
{
struct iso9660_dir_record *dir_rec;
struct buf *bp;
/* Find inode. */
bp = fetch_inode(extent, &offset);
if (bp == NULL)
return(NULL);
return EOF;
dir = get_free_dir_record(); /* Get a free record */
if (dir == NULL)
return(NULL);
dir_rec = (struct iso9660_dir_record*)(b_data(bp) + offset %
v_pri.logical_block_size_l);
/* Fill the dir record with the data read from the device */
create_dir_record(dir,b_data(bp) + offset, address);
/* In case the file is composed of more file sections, load also the
* next section into the structure */
new_pos = offset + dir->length;
dir_parent = dir;
new_address = address + dir->length;
while (new_pos < block_size) {
dir_next = get_free_dir_record();
create_dir_record(dir_next, b_data(bp) + new_pos, new_address);
if (dir_next->length > 0) {
strncpy(name,dir_next->file_id,dir_next->length_file_id);
name[dir_next->length_file_id] = '\0';
strncpy(old_name, dir_parent->file_id,
dir_parent->length_file_id);
old_name[dir_parent->length_file_id] = '\0';
if (strcmp(name, old_name) == 0) {
dir_parent->d_next = dir_next;
dir_next->d_prior = dir_parent;
/* Link the dir records */
dir_tmp = dir_next;
size = dir_tmp->data_length_l;
/* Update the file size */
while (dir_tmp->d_prior != NULL) {
dir_tmp = dir_tmp->d_prior;
size += dir_tmp->data_length_l;
dir_tmp->d_file_size = size;
/* Parse basic ISO 9660 specs. */
if (check_dir_record(dir_rec, offset % v_pri.logical_block_size_l) != OK) {
put_block(bp);
return EINVAL;
}
new_pos += dir_parent->length;
new_address += dir_next->length;
dir_parent = dir_next;
} else { /* This is another inode. */
release_dir_record(dir_next);
new_pos = block_size;
memset(&i_node->i_stat, 0, sizeof(struct stat));
i_node->i_stat.st_ino = get_extent_absolute_block_id(extent,
offset / v_pri.logical_block_size_l) * v_pri.logical_block_size_l +
offset % v_pri.logical_block_size_l;
read_inode_iso9660(i_node, dir_rec);
/* Parse extensions. */
read_inode_susp(i_node, dir_rec, bp, offset % v_pri.logical_block_size_l);
offset += dir_rec->length;
read_inode_extents(i_node, dir_rec, extent, &offset);
put_block(bp);
if (new_offset != NULL)
*new_offset = offset;
return OK;
}
} else { /* record not valid */
release_dir_record(dir_next);
new_pos = block_size; /* Exit from the while */
void read_inode_iso9660(struct inode *i, const struct iso9660_dir_record *dir_rec)
{
char *cp;
/* Parse first extent. */
if (dir_rec->data_length_l > 0) {
i->extent = alloc_extent();
i->extent->location = dir_rec->loc_extent_l +
dir_rec->ext_attr_rec_length;
i->extent->length = dir_rec->data_length_l /
v_pri.logical_block_size_l;
if (dir_rec->data_length_l % v_pri.logical_block_size_l)
i->extent->length++;
i->i_stat.st_size = dir_rec->data_length_l;
}
/* Parse timestamps (record date). */
i->i_stat.st_atime = i->i_stat.st_mtime = i->i_stat.st_ctime =
i->i_stat.st_birthtime = date7_to_time_t(dir_rec->rec_date);
if ((dir_rec->file_flags & D_TYPE) == D_DIRECTORY) {
i->i_stat.st_mode = S_IFDIR;
i->i_stat.st_ino = i->extent->location * v_pri.logical_block_size_l;
}
else
i->i_stat.st_mode = S_IFREG;
i->i_stat.st_mode |= 0555;
/* Parse file name. */
if (dir_rec->file_id[0] == 0)
strcpy(i->i_name, ".");
else if (dir_rec->file_id[0] == 1)
strcpy(i->i_name, "..");
else {
memcpy(i->i_name, dir_rec->file_id, dir_rec->length_file_id);
/* Truncate/ignore file version suffix. */
cp = strchr(i->i_name, ';');
if (cp != NULL)
*cp = '\0';
/* Truncate dot if file has no extension. */
if (strchr(i->i_name, '.') + 1 == cp)
*(cp-1) = '\0';
}
/* Initialize stat. */
i->i_stat.st_dev = fs_dev;
i->i_stat.st_blksize = v_pri.logical_block_size_l;
i->i_stat.st_blocks = dir_rec->data_length_l / v_pri.logical_block_size_l;
i->i_stat.st_nlink = 1;
}
void read_inode_extents(struct inode *i, const struct iso9660_dir_record *dir_rec,
struct dir_extent *extent, size_t *offset)
{
struct buf *bp;
struct iso9660_dir_record *extent_rec;
struct dir_extent *cur_extent = i->extent;
int done = FALSE;
/*
* No need to search extents if file is empty or has final directory
* record flag set.
*/
if (cur_extent == NULL || ((dir_rec->file_flags & D_NOT_LAST_EXTENT) == 0))
return;
while (!done) {
bp = fetch_inode(extent, offset);
if (bp == NULL)
return;
bp = read_extent_block(extent, *offset / v_pri.logical_block_size_l);
extent_rec = (struct iso9660_dir_record*)(b_data(bp) + *offset %
v_pri.logical_block_size_l);
if (check_dir_record(dir_rec, *offset % v_pri.logical_block_size_l) != OK) {
put_block(bp);
return;
}
/* Extent entries should share the same name. */
if ((dir_rec->length_file_id == extent_rec->length_file_id) &&
(memcmp(dir_rec->file_id, extent_rec->file_id, dir_rec->length_file_id) == 0)) {
/* Add the extent at the end of the linked list. */
cur_extent->next = alloc_extent();
cur_extent->next->location = dir_rec->loc_extent_l +
dir_rec->ext_attr_rec_length;
cur_extent->next->length = dir_rec->data_length_l /
v_pri.logical_block_size_l;
if (dir_rec->data_length_l % v_pri.logical_block_size_l)
cur_extent->next->length++;
i->i_stat.st_size += dir_rec->data_length_l;
i->i_stat.st_blocks += cur_extent->next->length;
cur_extent = cur_extent->next;
*offset += extent_rec->length;
}
else
done = TRUE;
/* Check if not last extent bit is not set. */
if ((dir_rec->file_flags & D_NOT_LAST_EXTENT) == 0)
done = TRUE;
put_block(bp);
}
}
put_block(bp); /* Release the block read. */
return(dir);
void read_inode_susp(struct inode *i, const struct iso9660_dir_record *dir_rec,
struct buf *bp, size_t offset)
{
int susp_offset, susp_size;
struct rrii_dir_record rrii_data;
susp_offset = 33 + dir_rec->length_file_id;
/* Get rid of padding byte. */
if(dir_rec->length_file_id % 2 == 0) {
susp_offset++;
}
if(dir_rec->length - susp_offset >= 4) {
susp_size = dir_rec->length - susp_offset;
/* Initialize rrii_dir_record structure with known, sane data. */
memcpy(rrii_data.mtime, dir_rec->rec_date, ISO9660_SIZE_DATE7);
memcpy(rrii_data.atime, dir_rec->rec_date, ISO9660_SIZE_DATE7);
memcpy(rrii_data.ctime, dir_rec->rec_date, ISO9660_SIZE_DATE7);
memcpy(rrii_data.birthtime, dir_rec->rec_date, ISO9660_SIZE_DATE7);
rrii_data.d_mode = i->i_stat.st_mode;
rrii_data.uid = 0;
rrii_data.gid = 0;
rrii_data.rdev = NO_DEV;
rrii_data.file_id_rrip[0] = '\0';
rrii_data.slink_rrip[0] = '\0';
parse_susp_buffer(&rrii_data, b_data(bp)+offset+susp_offset, susp_size);
/* Copy back data from rrii_dir_record structure. */
i->i_stat.st_atime = date7_to_time_t(rrii_data.atime);
i->i_stat.st_ctime = date7_to_time_t(rrii_data.ctime);
i->i_stat.st_mtime = date7_to_time_t(rrii_data.mtime);
i->i_stat.st_birthtime = date7_to_time_t(rrii_data.birthtime);
i->i_stat.st_mode = rrii_data.d_mode;
i->i_stat.st_uid = rrii_data.uid;
i->i_stat.st_gid = rrii_data.gid;
i->i_stat.st_rdev = rrii_data.rdev;
if (rrii_data.file_id_rrip[0] != '\0')
strlcpy(i->i_name, rrii_data.file_id_rrip, ISO9660_RRIP_MAX_FILE_ID_LEN);
if (rrii_data.slink_rrip[0] != '\0')
strlcpy(i->s_link, rrii_data.slink_rrip, ISO9660_RRIP_MAX_FILE_ID_LEN);
}
}
int check_dir_record(const struct iso9660_dir_record *d, size_t offset)
{
/* Run some consistency check on a directory entry. */
if ((d->length < 33) || (d->length_file_id < 1))
return EINVAL;
if (d->length_file_id + 32 > d->length)
return EINVAL;
if (offset + d->length > v_pri.logical_block_size_l)
return EINVAL;
return OK;
}

View file

@ -1,6 +1,10 @@
#include "const.h"
#include <sys/stat.h>
struct dir_record {
struct iso9660_dir_record {
/*
* ISO standard directory record.
*/
u8_t length; /* The length of the record */
u8_t ext_attr_rec_length;
u32_t loc_extent_l; /* The same data (in this case loc_extent)is */
@ -14,54 +18,54 @@ struct dir_record {
u32_t vol_seq_number; /* volume sequence number: not used */
u8_t length_file_id; /* Length name file */
char file_id[ISO9660_MAX_FILE_ID_LEN]; /* file name */
struct ext_attr_rec *ext_attr;
} __attribute__((packed));
/* Memory attrs */
u8_t d_count; /* Count if the dir_record is in use or not */
mode_t d_mode; /* file type, protection, etc. */
/* struct hash_idi_entry *id; */ /* id associated */
u32_t d_phy_addr; /* physical address of this dir record */
ino_t d_ino_nr; /* inode number (identical to the address) */
char d_mountpoint; /* true if mounted on */
struct dir_record *d_next; /* In case the file consists in more file sections
this points to the next one */
struct dir_record *d_prior; /* The same as before, this points to the dir parent */
u32_t d_file_size; /* Total size of the file */
struct rrii_dir_record {
/*
* Rock Ridge directory record extensions.
*/
u8_t mtime[7]; /* stat.st_mtime */
u8_t atime[7]; /* stat.st_atime */
u8_t ctime[7]; /* stat.st_ctime */
u8_t birthtime[7]; /* stat.st_birthtime */
} dir_records[NR_DIR_RECORDS];
mode_t d_mode; /* file mode */
uid_t uid; /* user ID of the file's owner */
gid_t gid; /* group ID of the file's group */
dev_t rdev; /* device ID */
struct ext_attr_rec {
u32_t own_id;
u32_t group_id;
u16_t permissions;
char file_cre_date[ISO9660_SIZE_VOL_CRE_DATE];
char file_mod_date[ISO9660_SIZE_VOL_MOD_DATE];
char file_exp_date[ISO9660_SIZE_VOL_EXP_DATE];
char file_eff_date[ISO9660_SIZE_VOL_EFF_DATE];
u8_t rec_format;
u8_t rec_attrs;
u32_t rec_length;
char system_id[ISO9660_SIZE_SYS_ID];
char system_use[ISO9660_SIZE_SYSTEM_USE];
u8_t ext_attr_rec_ver;
u8_t len_esc_seq;
char file_id_rrip[ISO9660_RRIP_MAX_FILE_ID_LEN]; /* file name */
char slink_rrip[ISO9660_RRIP_MAX_FILE_ID_LEN]; /* symbolic link */
} ;
int count;
} ext_attr_recs[NR_ATTR_RECS];
struct dir_extent {
/*
* Extent (contiguous array of logical sectors).
*/
char in_use;
u32_t location;
u32_t length;
struct dir_extent *next;
} ;
struct inode {
int i_count; /* usage counter of this inode */
int i_mountpoint; /* flag for inode being used as a mount point */
int ea_length; /* total size of extended attributes in bytes */
struct stat i_stat; /* inode properties */
struct dir_extent *extent; /* first extent of file */
char i_name[NAME_MAX]; /* inode name */
char s_link[NAME_MAX]; /* symbolic link target */
} ;
struct opt {
/*
* Global mount options.
*/
int norock; /* Bool: dont use Rock Ridge */
} ;
#define D_DIRECTORY 0x2
#define D_NOT_LAST_EXTENT 0x80
#define D_TYPE 0x8E
/* Vector with all the ids of the dir records */
/* PUBLIC struct hash_idi_entry { */
/* u32_t h_phy_addr; */
/* struct dir_record *h_dir_record; */
/* } hash_idi[NR_ID_INODES]; */
/* PUBLIC int size_hash_idi; */
/* #define ID_DIR_RECORD(id) id - hash_idi + 1 */
#define ID_DIR_RECORD(dir) dir->d_ino_nr
/* #define ASSIGN_ID 1 */
/* #define NOT_ASSIGN_ID 0 */

36
minix/fs/iso9660fs/link.c Normal file
View file

@ -0,0 +1,36 @@
#include "inc.h"
#include <minix/com.h>
#include <minix/vfsif.h>
#include <fcntl.h>
#ifdef __NBSD_LIBC
#include <stddef.h>
#endif
#include "proto.h"
int fs_rdlink()
{
struct inode *i_node; /* target inode */
int r; /* return value */
size_t copylen;
/* Try to get inode according to its index */
i_node = find_inode(fs_m_in.m_vfs_fs_rdlink.inode);
if (i_node == NULL)
return EINVAL; /* no inode found */
if(!S_ISLNK(i_node->i_stat.st_mode))
r = EACCES;
else {
/* Passed all checks */
copylen = MIN( (size_t) fs_m_in.m_vfs_fs_rdlink.mem_size, NAME_MAX);
r = sys_safecopyto(VFS_PROC_NR,
(cp_grant_id_t) fs_m_in.m_vfs_fs_rdlink.grant,
(vir_bytes) 0,
(vir_bytes) i_node->s_link,
copylen);
}
return r;
}

View file

@ -1,5 +1,7 @@
/* This file contains the main directory for the server. It waits for a
* request and then send a response. */
/*
* This file contains the main function for the server. It waits for a request
* and then send a response.
*/
#include "inc.h"
#include <minix/vfsif.h>
@ -15,18 +17,20 @@ static void sef_local_startup(void);
static int sef_cb_init_fresh(int type, sef_init_info_t *info);
static void sef_cb_signal_handler(int signo);
/*===========================================================================*
* main *
*===========================================================================*/
int main(void) {
static struct optset optset_table[] = {
{ "norock", OPT_BOOL, &opt.norock, TRUE },
{ NULL, 0, NULL, 0 }
};
int main(int argc, char *argv[]) {
endpoint_t who_e;
int ind, error, transid;
/* SEF local startup. */
env_setargs(argc, argv);
sef_local_startup();
for (;;) {
while (TRUE) {
/* Wait for request message. */
get_work(&fs_m_in);
@ -36,7 +40,8 @@ int main(void) {
assert(!IS_VFS_FS_TRANSID(transid));
fs_m_in.m_type = transid; /* Backwards compat. */
transid = 0;
} else
}
else
assert(IS_VFS_FS_TRANSID(transid));
error = OK;
@ -60,9 +65,9 @@ int main(void) {
ind = req_nr - FS_BASE;
if (ind < 0 || ind >= NREQS) {
if (ind < 0 || ind >= NREQS)
error = EINVAL;
} else
else
error = (*fs_call_vec[ind])(); /* Process the request calling
* the appropriate function. */
@ -80,6 +85,17 @@ int main(void) {
*===========================================================================*/
static void sef_local_startup()
{
/* Initialize the Minix file server. */
int i;
/* Defaults */
opt.norock = FALSE;
/* If we have been given an options string, parse options here. */
for (i = 1; i < env_argc - 1; i++)
if (!strcmp(env_argv[i], "-o"))
optset_parse(optset_table, env_argv[++i]);
/* Register init callbacks. */
sef_setcb_init_fresh(sef_cb_init_fresh);
sef_setcb_init_restart(sef_cb_init_fail);
@ -95,22 +111,14 @@ static void sef_local_startup()
lmfs_buf_pool(10);
}
/*===========================================================================*
* sef_cb_init_fresh *
*===========================================================================*/
static int sef_cb_init_fresh(int type, sef_init_info_t *info)
{
/* Initialize the iso9660fs server. */
/* hash_init(); */ /* Init the table with the ids */
setenv("TZ","",1); /* Used to calculate the time */
return(OK);
return OK;
}
/*===========================================================================*
* sef_cb_signal_handler *
*===========================================================================*/
static void sef_cb_signal_handler(int signo)
{
/* Only check for termination signal, ignore anything else. */
@ -118,30 +126,23 @@ static void sef_cb_signal_handler(int signo)
/* No need to do a sync, as this is a read-only file system. */
/* If the file system has already been unmounted, exit immediately.
/*
* If the file system has already been unmounted, exit immediately.
* We might not get another message.
*/
if (unmountdone) exit(0);
}
/*===========================================================================*
* get_work *
*===========================================================================*/
static void get_work(m_in)
message *m_in; /* pointer to message */
static void get_work(message *m_in)
{
int s; /* receive status */
if (OK != (s = sef_receive(ANY, m_in))) /* wait for message */
panic("sef_receive failed: %d", s);
}
/*===========================================================================*
* reply *
*===========================================================================*/
void reply(who, m_out)
int who;
message *m_out; /* report result */
void reply(int who, message *m_out)
{
if (OK != ipc_send(who, m_out)) /* send the message */
printf("ISOFS(%d) was unable to send reply\n", sef_self());
}

View file

@ -3,20 +3,12 @@
#include <minix/vfsif.h>
#include <minix/bdev.h>
/*===========================================================================*
* fs_sync *
*===========================================================================*/
int fs_sync()
{
/* Always mounted read only, so nothing to sync */
return(OK); /* sync() can't fail */
return OK; /* sync() can't fail */
}
/*===========================================================================*
* fs_new_driver *
*===========================================================================*/
int fs_new_driver(void)
{
/* Set a new driver endpoint for this device. */
@ -31,17 +23,17 @@ int fs_new_driver(void)
label_len = fs_m_in.m_vfs_fs_new_driver.path_len;
if (label_len > sizeof(label))
return(EINVAL);
return EINVAL;
r = sys_safecopyfrom(fs_m_in.m_source, label_gid, (vir_bytes) 0,
(vir_bytes) label, label_len);
if (r != OK) {
printf("ISOFS: fs_new_driver safecopyfrom failed (%d)\n", r);
return(EINVAL);
return EINVAL;
}
bdev_driver(dev, label);
return(OK);
return OK;
}

View file

@ -4,12 +4,7 @@
#include "const.h"
#include "glo.h"
/*===========================================================================*
* fs_readsuper *
*===========================================================================*/
int fs_readsuper() {
cp_grant_id_t label_gid;
size_t label_len;
int r = OK;
@ -19,13 +14,13 @@ int fs_readsuper() {
label_len = fs_m_in.m_vfs_fs_readsuper.path_len;
if (label_len > sizeof(fs_dev_label))
return(EINVAL);
return EINVAL;
r = sys_safecopyfrom(fs_m_in.m_source, label_gid, 0, (vir_bytes)fs_dev_label,
label_len);
if (r != OK) {
printf("ISOFS %s:%d safecopyfrom failed: %d\n", __FILE__, __LINE__, r);
return(EINVAL);
return EINVAL;
}
/* Map the driver label for this major */
@ -33,69 +28,62 @@ int fs_readsuper() {
/* Open the device the file system lives on in read only mode */
if (bdev_open(fs_dev, BDEV_R_BIT) != OK) {
return(EINVAL);
return EINVAL;
}
/* Read the superblock */
r = read_vds(&v_pri, fs_dev);
if (r != OK) {
bdev_close(fs_dev);
return(r);
return r;
}
lmfs_set_blocksize(v_pri.logical_block_size_l, major(fs_dev));
/* Return some root inode properties */
fs_m_out.m_fs_vfs_readsuper.inode = ID_DIR_RECORD(v_pri.dir_rec_root);
fs_m_out.m_fs_vfs_readsuper.mode = v_pri.dir_rec_root->d_mode;
fs_m_out.m_fs_vfs_readsuper.file_size = v_pri.dir_rec_root->d_file_size;
fs_m_out.m_fs_vfs_readsuper.inode = v_pri.inode_root->i_stat.st_ino;
fs_m_out.m_fs_vfs_readsuper.mode = v_pri.inode_root->i_stat.st_mode;
fs_m_out.m_fs_vfs_readsuper.file_size = v_pri.inode_root->i_stat.st_size;
fs_m_out.m_fs_vfs_readsuper.uid = SYS_UID; /* Always root */
fs_m_out.m_fs_vfs_readsuper.gid = SYS_GID; /* operator */
fs_m_out.m_fs_vfs_readsuper.flags = RES_NOFLAGS;
return(r);
return r;
}
/*===========================================================================*
* fs_mountpoint *
*===========================================================================*/
int fs_mountpoint()
{
/* This function looks up the mount point, it checks the condition whether
* the partition can be mounted on the inode or not.
/*
* This function looks up the mount point, it checks the condition
* whether the partition can be mounted on the inode or not.
*/
register struct dir_record *rip;
struct inode *rip;
int r = OK;
/* Temporarily open the file. */
if ((rip = get_dir_record(fs_m_in.m_vfs_fs_mountpoint.inode)) == NULL)
return(EINVAL);
if ((rip = find_inode(fs_m_in.m_vfs_fs_mountpoint.inode)) == NULL)
return EINVAL;
if (rip->d_mountpoint)
if (rip->i_mountpoint)
r = EBUSY;
/* If the inode is not a dir returns error */
if ((rip->d_mode & I_TYPE) != I_DIRECTORY)
if ((rip->i_stat.st_mode & I_TYPE) != I_DIRECTORY)
r = ENOTDIR;
release_dir_record(rip);
put_inode(rip);
if (r == OK)
rip->d_mountpoint = TRUE;
rip->i_mountpoint = TRUE;
return(r);
return r;
}
/*===========================================================================*
* fs_unmount *
*===========================================================================*/
int fs_unmount(void) {
release_v_pri(&v_pri); /* Release the super block */
int fs_unmount(void)
{
release_vol_pri_desc(&v_pri); /* Release the super block */
bdev_close(fs_dev);
unmountdone = TRUE;
return(OK);
return OK;
}

View file

@ -2,12 +2,12 @@
#include <string.h>
#include <minix/com.h>
#include <minix/vfsif.h>
#include "buf.h"
#include <sys/stat.h>
static char *get_name(char *name, char string[NAME_MAX+1]);
static int ltraverse(struct inode *rip, char *suffix);
static int parse_path(ino_t dir_ino, ino_t root_ino, int flags, struct
dir_record **res_inop, size_t *offsetp);
inode **res_inop, size_t *offsetp, int *symlinkp);
/*===========================================================================*
@ -15,10 +15,10 @@ static int parse_path(ino_t dir_ino, ino_t root_ino, int flags, struct
*===========================================================================*/
int fs_lookup() {
cp_grant_id_t grant;
int r, len, flags;
size_t offset;
int r, len, flags, symlinks = 0;
size_t offset = 0;
ino_t dir_ino, root_ino;
struct dir_record *dir;
struct inode *dir = 0;
grant = fs_m_in.m_vfs_fs_lookup.grant_path;
len = fs_m_in.m_vfs_fs_lookup.path_len; /* including terminating nul */
@ -29,8 +29,10 @@ int fs_lookup() {
caller_gid = fs_m_in.m_vfs_fs_lookup.gid;
/* Check length. */
if(len > sizeof(user_path)) return(E2BIG); /* too big for buffer */
if(len < 1) return(EINVAL); /* too small */
if(len > sizeof(user_path))
return E2BIG; /* too big for buffer */
if(len < 1)
return EINVAL; /* too small */
/* Copy the pathname and set up caller's user and group id */
r = sys_safecopyfrom(VFS_PROC_NR, grant, 0, (vir_bytes) user_path,
@ -38,39 +40,40 @@ int fs_lookup() {
if (r != OK) {
printf("ISOFS %s:%d sys_safecopyfrom failed: %d\n",
__FILE__, __LINE__, r);
return(r);
return r;
}
/* Verify this is a null-terminated path. */
if(user_path[len-1] != '\0') return(EINVAL);
if(user_path[len-1] != '\0')
return EINVAL;
/* Lookup inode */
dir = NULL;
offset = 0;
r = parse_path(dir_ino, root_ino, flags, &dir, &offset);
r = parse_path(dir_ino, root_ino, flags, &dir, &offset, &symlinks);
if (r == ELEAVEMOUNT) {
if(r == ELEAVEMOUNT || r == ESYMLINK) {
/* Report offset and the error */
fs_m_out.m_fs_vfs_lookup.offset = offset;
fs_m_out.m_fs_vfs_lookup.symloop = 0;
return(r);
fs_m_out.m_fs_vfs_lookup.symloop = symlinks;
return r;
}
if (r != OK && r != EENTERMOUNT) return(r);
if (r != OK && r != EENTERMOUNT)
return r;
fs_m_out.m_fs_vfs_lookup.inode = ID_DIR_RECORD(dir);
fs_m_out.m_fs_vfs_lookup.mode = dir->d_mode;
fs_m_out.m_fs_vfs_lookup.file_size = dir->d_file_size;
fs_m_out.m_fs_vfs_lookup.inode = dir->i_stat.st_ino;
fs_m_out.m_fs_vfs_lookup.mode = dir->i_stat.st_mode;
fs_m_out.m_fs_vfs_lookup.file_size = dir->i_stat.st_size;
fs_m_out.m_fs_vfs_lookup.device = dir->i_stat.st_rdev;
fs_m_out.m_fs_vfs_lookup.symloop = 0;
fs_m_out.m_fs_vfs_lookup.uid = SYS_UID; /* root */
fs_m_out.m_fs_vfs_lookup.gid = SYS_GID; /* operator */
fs_m_out.m_fs_vfs_lookup.uid = dir->i_stat.st_uid;
fs_m_out.m_fs_vfs_lookup.gid = dir->i_stat.st_gid;
if (r == EENTERMOUNT) {
fs_m_out.m_fs_vfs_lookup.offset = offset;
release_dir_record(dir);
put_inode(dir);
}
return(r);
return r;
}
/* The search dir actually performs the operation of searching for the
@ -80,101 +83,78 @@ int fs_lookup() {
* search_dir *
*===========================================================================*/
int search_dir(
register struct dir_record *ldir_ptr, /* dir record parent */
struct inode *ldir_ptr, /* dir record parent */
char string[NAME_MAX], /* component to search for */
ino_t *numb /* pointer to new dir record */
) {
struct dir_record *dir_tmp;
register struct buf *bp;
int pos;
char* comma_pos = NULL;
char tmp_string[NAME_MAX];
struct inode *dir_tmp;
size_t pos = 0;
int r;
/* This function search a particular element (in string) in a inode and
* return its number */
/*
* This function search a particular element (in string) in a inode and
* return its number.
*/
/* Initialize the tmp array */
memset(tmp_string,'\0',NAME_MAX);
if ((ldir_ptr->d_mode & I_TYPE) != I_DIRECTORY) {
return(ENOTDIR);
}
if ((ldir_ptr->i_stat.st_mode & S_IFMT) != S_IFDIR)
return ENOTDIR;
if (strcmp(string, ".") == 0) {
*numb = ID_DIR_RECORD(ldir_ptr);
*numb = ldir_ptr->i_stat.st_ino;
return OK;
}
if (strcmp(string,"..") == 0 && ldir_ptr->loc_extent_l == v_pri.dir_rec_root->loc_extent_l) {
*numb = ROOT_INO_NR;
/* *numb = ID_DIR_RECORD(ldir_ptr); */
/*
* Parent directories need special attention to make sure directory
* inodes stay consistent.
*/
if (strcmp(string, "..") == 0) {
if (ldir_ptr->i_stat.st_ino == v_pri.inode_root->i_stat.st_ino) {
*numb = v_pri.inode_root->i_stat.st_ino;
return OK;
}
else {
dir_tmp = alloc_inode();
r = read_inode(dir_tmp, ldir_ptr->extent, pos, &pos);
if ((r != OK) || (pos >= ldir_ptr->i_stat.st_size)) {
put_inode(dir_tmp);
return EINVAL;
}
r = read_inode(dir_tmp, ldir_ptr->extent, pos, &pos);
if ((r != OK) || (pos >= ldir_ptr->i_stat.st_size)) {
put_inode(dir_tmp);
return EINVAL;
}
*numb = dir_tmp->i_stat.st_ino;
put_inode(dir_tmp);
return OK;
}
}
/* Read the dir's content */
pos = ldir_ptr->ext_attr_rec_length;
bp = get_block(ldir_ptr->loc_extent_l);
if (bp == NULL)
return EINVAL;
while (pos < v_pri.logical_block_size_l) {
if ((dir_tmp = get_free_dir_record()) == NULL) {
put_block(bp);
while (TRUE) {
dir_tmp = alloc_inode();
r = read_inode(dir_tmp, ldir_ptr->extent, pos, &pos);
if ((r != OK) || (pos >= ldir_ptr->i_stat.st_size)) {
put_inode(dir_tmp);
return EINVAL;
}
if (create_dir_record(dir_tmp,b_data(bp) + pos,
ldir_ptr->loc_extent_l*v_pri.logical_block_size_l + pos) == EINVAL)
return EINVAL;
if (dir_tmp->length == 0) {
release_dir_record(dir_tmp);
put_block(bp);
return EINVAL;
}
memcpy(tmp_string,dir_tmp->file_id,dir_tmp->length_file_id);
comma_pos = strchr(tmp_string,';');
if (comma_pos != NULL)
*comma_pos = 0;
else
tmp_string[dir_tmp->length_file_id] = 0;
if (tmp_string[strlen(tmp_string) - 1] == '.')
tmp_string[strlen(tmp_string) - 1] = '\0';
if (strcmp(tmp_string,string) == 0 ||
(dir_tmp->file_id[0] == 1 && strcmp(string,"..") == 0)) {
/* If the element is found or we are searchig for... */
if (dir_tmp->loc_extent_l == dir_records->loc_extent_l) {
/* In this case the inode is a root because the parent
* points to the same location than the inode. */
*numb = 1;
release_dir_record(dir_tmp);
put_block(bp);
if ((strcmp(dir_tmp->i_name, string) == 0) ||
(strcmp(dir_tmp->i_name, "..") && strcmp(string, "..") == 0)) {
if (dir_tmp->i_stat.st_ino == v_pri.inode_root->i_stat.st_ino) {
*numb = v_pri.inode_root->i_stat.st_ino;
put_inode(dir_tmp);
return OK;
}
if (dir_tmp->ext_attr_rec_length != 0) {
dir_tmp->ext_attr = get_free_ext_attr();
create_ext_attr(dir_tmp->ext_attr,b_data(bp));
}
*numb = ID_DIR_RECORD(dir_tmp);
release_dir_record(dir_tmp);
put_block(bp);
*numb = dir_tmp->i_stat.st_ino;
put_inode(dir_tmp);
return OK;
}
pos += dir_tmp->length;
release_dir_record(dir_tmp);
put_inode(dir_tmp);
}
put_block(bp);
return EINVAL;
}
@ -185,21 +165,23 @@ static int parse_path(
ino_t dir_ino,
ino_t root_ino,
int flags,
struct dir_record **res_inop,
size_t *offsetp
struct inode **res_inop,
size_t *offsetp,
int *symlinkp
) {
int r;
char string[NAME_MAX+1];
char *cp, *ncp;
struct dir_record *start_dir, *old_dir;
struct inode *start_dir = 0, *old_dir = 0;
/* Find starting inode inode according to the request message */
if ((start_dir = get_dir_record(dir_ino)) == NULL) {
if ((start_dir = find_inode(dir_ino)) == NULL) {
printf("ISOFS: couldn't find starting inode %llu\n", dir_ino);
return(ENOENT);
return ENOENT;
}
cp = user_path;
dup_inode(start_dir);
/* Scan the path component by component. */
while (TRUE) {
@ -209,15 +191,16 @@ size_t *offsetp
*offsetp += cp-user_path;
/* Return EENTERMOUNT if we are at a mount point */
if (start_dir->d_mountpoint)
if (start_dir->i_mountpoint)
return EENTERMOUNT;
return OK;
}
if (cp[0] == '/') {
/* Special case code. If the remaining path consists of just
* slashes, we need to look up '.'
/*
* Special case code. If the remaining path consists of
* just slashes, we need to look up '.'
*/
while(cp[0] == '/')
cp++;
@ -227,7 +210,8 @@ size_t *offsetp
}
else
ncp = get_name(cp, string);
} else
}
else
/* Just get the first component */
ncp = get_name(cp, string);
@ -238,23 +222,24 @@ size_t *offsetp
if (strcmp(string, "..") == 0) {
/* This condition is not necessary since it will never be the root filesystem */
/* if (start_dir == dir_records) { */
/* if (start_dir == v_pri.inode_root) { */
/* cp = ncp; */
/* continue; /\* Just ignore the '..' at a process' */
/* * root. */
/* *\/ */
/* } */
if (start_dir == dir_records) {
/* Climbing up mountpoint */
release_dir_record(start_dir);
if (start_dir == v_pri.inode_root) {
/* Climbing up mountpoint. */
put_inode(start_dir);
*res_inop = NULL;
*offsetp += cp-user_path;
return ELEAVEMOUNT;
}
} else {
}
else {
/* Only check for a mount point if we are not looking for '..'. */
if (start_dir->d_mountpoint) {
if (start_dir->i_mountpoint) {
*res_inop = start_dir;
*offsetp += cp-user_path;
return EENTERMOUNT;
@ -267,64 +252,161 @@ size_t *offsetp
r = advance(old_dir, string, &start_dir);
if (r != OK) {
release_dir_record(old_dir);
put_inode(old_dir);
return r;
}
release_dir_record(old_dir);
/* The call to advance() succeeded. Fetch next component. */
if (S_ISLNK(start_dir->i_stat.st_mode)) {
if (ncp[0] == '\0' && (flags & PATH_RET_SYMLINK)) {
put_inode(old_dir);
*res_inop = start_dir;
*offsetp += ncp - user_path;
return OK;
}
/* Extract path name from the symlink file */
r = ltraverse(start_dir, ncp);
ncp = user_path;
*offsetp = 0;
/* Symloop limit reached? */
if (++(*symlinkp) > _POSIX_SYMLOOP_MAX)
r = ELOOP;
if (r != OK) {
put_inode(old_dir);
put_inode(start_dir);
return r;
}
if (ncp[0] == '/') {
put_inode(old_dir);
put_inode(start_dir);
return ESYMLINK;
}
put_inode(start_dir);
dup_inode(old_dir);
start_dir = old_dir;
}
put_inode(old_dir);
cp = ncp;
}
}
/*===========================================================================*
* ltraverse *
*===========================================================================*/
static int ltraverse(
struct inode *rip, /* symbolic link */
char *suffix) /* current remaining path. Has to point in the
* user_path buffer
*/
{
/* Traverse a symbolic link. Copy the link text from the inode and insert
* the text into the path. Return error code or report success. Base
* directory has to be determined according to the first character of the
* new pathname.
*/
size_t llen; /* length of link */
size_t slen; /* length of suffix */
char *sp; /* start of link text */
llen = strlen(rip->s_link);
sp = rip->s_link;
slen = strlen(suffix);
/* The path we're parsing looks like this:
* /already/processed/path/<link> or
* /already/processed/path/<link>/not/yet/processed/path
* After expanding the <link>, the path will look like
* <expandedlink> or
* <expandedlink>/not/yet/processed
* In both cases user_path must have enough room to hold <expandedlink>.
* However, in the latter case we have to move /not/yet/processed to the
* right place first, before we expand <link>. When strlen(<expandedlink>) is
* smaller than strlen(/already/processes/path), we move the suffix to the
* left. Is strlen(<expandedlink>) greater then we move it to the right. Else
* we do nothing.
*/
if (slen > 0) { /* Do we have path after the link? */
/* For simplicity we require that suffix starts with a slash */
if (suffix[0] != '/') {
panic("ltraverse: suffix does not start with a slash");
}
/* To be able to expand the <link>, we have to move the 'suffix'
* to the right place.
*/
if (slen + llen + 1 > sizeof(user_path))
return ENAMETOOLONG;/* <expandedlink>+suffix+\0 does not fit*/
if ((unsigned) (suffix - user_path) != llen) {
/* Move suffix left or right */
memmove(&user_path[llen], suffix, slen+1);
}
}
else {
if (llen + 1 > sizeof(user_path))
return ENAMETOOLONG; /* <expandedlink> + \0 does not fix */
/* Set terminating nul */
user_path[llen]= '\0';
}
/* Everything is set, now copy the expanded link to user_path */
memmove(user_path, sp, llen);
return OK;
}
/*===========================================================================*
* advance *
*===========================================================================*/
int advance(dirp, string, resp)
struct dir_record *dirp; /* inode for directory to be searched */
char string[NAME_MAX]; /* component name to look for */
struct dir_record **resp; /* resulting inode */
int advance(
struct inode *dirp, /* inode for directory to be searched */
char string[NAME_MAX], /* component name to look for */
struct inode **resp) /* resulting inode */
{
/* Given a directory and a component of a path, look up the component in
* the directory, find the inode, open it, and return a pointer to its inode
* slot.
*/
register struct dir_record *rip = NULL;
struct inode *rip = NULL;
int r;
ino_t numb;
/* If 'string' is empty, yield same inode straight away. */
if (string[0] == '\0') {
if (string[0] == '\0')
return ENOENT;
}
/* Check for NULL. */
if (dirp == NULL) {
if (dirp == NULL)
return EINVAL;
}
/* If 'string' is not present in the directory, signal error. */
if ( (r = search_dir(dirp, string, &numb)) != OK) {
if ( (r = search_dir(dirp, string, &numb)) != OK)
return r;
}
/* The component has been found in the directory. Get inode. */
if ( (rip = get_dir_record((int) numb)) == NULL) {
return(err_code);
}
if ( (rip = get_inode((int) numb)) == NULL)
return err_code;
*resp= rip;
return OK;
}
/*===========================================================================*
* get_name *
*===========================================================================*/
static char *get_name(path_name, string)
char *path_name; /* path name to parse */
char string[NAME_MAX+1]; /* component extracted from 'old_name' */
static char *get_name(
char *path_name, /* path name to parse */
char string[NAME_MAX+1]) /* component extracted from 'old_name' */
{
/* Given a pointer to a path name in fs space, 'path_name', copy the first
* component to 'string' (truncated if necessary, always nul terminated).
@ -357,15 +439,13 @@ char string[NAME_MAX+1]; /* component extracted from 'old_name' */
/* Special case of the string at cp is empty */
if (len == 0)
{
/* Return "." */
strlcpy(string, ".", NAME_MAX + 1);
}
else
{
else {
memcpy(string, cp, len);
string[len]= '\0';
}
return ep;
}

View file

@ -1,8 +1,11 @@
/* Function prototypes for iso9660 file system. */
struct dir_record;
struct ext_attr_rec;
struct iso9660_vd_pri;
struct dir_extent;
struct rrii_dir_record;
struct iso9660_dir_record;
struct iso9660_vol_pri_desc;
struct inode;
#include <minix/libminixfs.h>
@ -10,20 +13,30 @@ struct iso9660_vd_pri;
#define put_block(n) lmfs_put_block(n, FULL_DATA_BLOCK)
/* main.c */
int main(void);
int main(int argc, char *argv[]);
void reply(int who, message *m_out);
/* inode.c */
int create_dir_record(struct dir_record *dir, char *buffer, u32_t
address);
int create_ext_attr(struct ext_attr_rec *ext, char *buffer);
int fs_getnode(void);
int fs_putnode(void);
struct dir_record *get_dir_record(ino_t id_dir);
struct dir_record *get_free_dir_record(void);
struct ext_attr_rec *get_free_ext_attr(void);
struct dir_record *load_dir_record_from_disk(u32_t address);
int release_dir_record(struct dir_record *dir);
struct inode* alloc_inode();
struct inode* find_inode(ino_t i);
void put_inode(struct inode *i);
void dup_inode(struct inode *i_node);
struct inode* get_inode(ino_t i);
int read_inode(struct inode *i_node, struct dir_extent *extent, size_t offset,
size_t *new_offset);
void read_inode_iso9660(struct inode *i, const struct iso9660_dir_record *dir_rec);
void read_inode_extents(struct inode *i, const struct iso9660_dir_record *dir_rec,
struct dir_extent *extent, size_t *offset);
void read_inode_susp(struct inode *i, const struct iso9660_dir_record *dir_rec,
struct buf *bp, size_t offset);
int check_dir_record(const struct iso9660_dir_record *d, size_t offset);
/* link.c */
int fs_rdlink(void);
/* misc.c */
int fs_sync(void);
@ -36,29 +49,44 @@ int fs_unmount(void);
/* path.c */
int fs_lookup(void);
int advance(struct dir_record *dirp, char string[NAME_MAX], struct
dir_record **resp);
int search_dir(struct dir_record *ldir_ptr, char string [NAME_MAX], ino_t *numb);
int advance(struct inode *dirp, char string[NAME_MAX], struct
inode **resp);
int search_dir(struct inode *ldir_ptr, char string [NAME_MAX], ino_t *numb);
/* read.c */
int fs_read(void);
int fs_bread(void);
int fs_getdents(void);
int read_chunk(struct dir_record *rip, u64_t position, unsigned off, int
int read_chunk(struct inode *rip, u64_t position, unsigned off, int
chunk, unsigned left, cp_grant_id_t gid, unsigned buf_off, int
block_size, int *completed, int rw);
/* stadir.c */
int fs_stat(void);
int fs_statvfs(void);
/* super.c */
int release_v_pri(struct iso9660_vd_pri *v_pri);
int read_vds(struct iso9660_vd_pri *v_pri, dev_t dev);
int create_v_pri(struct iso9660_vd_pri *v_pri, char *buffer, unsigned
long address);
int release_vol_pri_desc(struct iso9660_vol_pri_desc *v_pri);
int create_vol_pri_desc(struct iso9660_vol_pri_desc *v_pri, char *buf,
size_t address);
int read_vds(struct iso9660_vol_pri_desc *v_pri, dev_t dev);
/* susp.c */
int parse_susp(struct rrii_dir_record *dir, char *buffer);
void parse_susp_buffer(struct rrii_dir_record *dir, char *buffer, u32_t size);
/* susp_rock_ridge.c */
void parse_susp_rock_ridge_sl(struct rrii_dir_record *dir, char *buffer, int length);
int parse_susp_rock_ridge(struct rrii_dir_record *dir, char *buffer);
/* utility.c */
struct dir_extent* alloc_extent();
void free_extent(struct dir_extent *extent);
struct buf* read_extent_block(struct dir_extent *e, size_t block);
size_t get_extent_absolute_block_id(struct dir_extent *e, size_t block);
time_t date7_to_time_t(const u8_t *date);
int do_noop(void);
int no_sys(void);

View file

@ -4,23 +4,16 @@
#include <minix/minlib.h>
#include <fcntl.h>
#include <stddef.h>
#include "buf.h"
static char getdents_buf[GETDENTS_BUFSIZ];
/*===========================================================================*
* fs_read *
*===========================================================================*/
int fs_read(void) {
int r, chunk, block_size;
size_t nrbytes;
int fs_read(void)
{
int r = OK, chunk, block_size, completed, rw;
size_t nrbytes, off, cum_io;
cp_grant_id_t gid;
off_t position, f_size, bytes_left;
unsigned int off, cum_io;
int completed;
struct dir_record *dir;
int rw;
struct inode *i_node;
switch(fs_m_in.m_type) {
case REQ_READ: rw = READING; break;
@ -28,70 +21,67 @@ int fs_read(void) {
default: panic("odd m_type");
}
r = OK;
/* Try to get inode according to its index */
dir = get_dir_record(fs_m_in.m_vfs_fs_readwrite.inode);
if (dir == NULL) return(EINVAL); /* no inode found */
/* Try to get inode according to its index. */
i_node = find_inode(fs_m_in.m_vfs_fs_readwrite.inode);
if (i_node == NULL)
return EINVAL; /* No inode found. */
position = fs_m_in.m_vfs_fs_readwrite.seek_pos;
nrbytes = fs_m_in.m_vfs_fs_readwrite.nbytes; /* number of bytes to read */
nrbytes = fs_m_in.m_vfs_fs_readwrite.nbytes; /* Number of bytes to read. */
block_size = v_pri.logical_block_size_l;
gid = fs_m_in.m_vfs_fs_readwrite.grant;
f_size = dir->d_file_size;
rdwt_err = OK; /* set to EIO if disk error occurs */
f_size = i_node->i_stat.st_size;
rdwt_err = OK; /* Set to EIO if disk error occurs. */
cum_io = 0;
/* Split the transfer into chunks that don't span two blocks. */
while (nrbytes != 0) {
off = position % block_size;
chunk = MIN(nrbytes, block_size - off);
if (chunk < 0) chunk = block_size - off;
if (chunk < 0)
chunk = block_size - off;
bytes_left = f_size - position;
if (position >= f_size) break; /* we are beyond EOF */
if (chunk > bytes_left) chunk = (int32_t) bytes_left;
if (position >= f_size)
break; /* We are beyond EOF. */
if (chunk > bytes_left)
chunk = (int32_t) bytes_left;
/* Read or write 'chunk' bytes. */
r = read_chunk(dir, position, off, chunk,
r = read_chunk(i_node, position, off, chunk,
(uint32_t) nrbytes, gid, cum_io, block_size,
&completed, rw);
if (r != OK) break; /* EOF reached */
if (rdwt_err < 0) break;
if (r != OK)
break; /* EOF reached. */
if (rdwt_err < 0)
break;
/* Update counters and pointers. */
nrbytes -= chunk; /* bytes yet to be read */
cum_io += chunk; /* bytes read so far */
position += chunk; /* position within the file */
nrbytes -= chunk; /* Bytes yet to be read. */
cum_io += chunk; /* Bytes read so far. */
position += chunk; /* Position within the file. */
}
fs_m_out.m_fs_vfs_readwrite.seek_pos = position;
if (rdwt_err != OK) r = rdwt_err; /* check for disk error */
if (rdwt_err == END_OF_FILE) r = OK;
if (rdwt_err != OK)
r = rdwt_err; /* Check for disk error. */
if (rdwt_err == END_OF_FILE)
r = OK;
fs_m_out.m_fs_vfs_readwrite.nbytes = cum_io; /*dir->d_file_size;*/
release_dir_record(dir);
return(r);
fs_m_out.m_fs_vfs_readwrite.nbytes = cum_io;
return r;
}
/*===========================================================================*
* fs_bread *
*===========================================================================*/
int fs_bread(void)
{
int r, rw_flag, chunk, block_size;
int r = OK, rw_flag, chunk, block_size, completed;
size_t nrbytes, off, cum_io;
cp_grant_id_t gid;
int nrbytes;
u64_t position;
unsigned int off, cum_io;
int completed;
struct dir_record *dir;
off_t position;
struct inode *i_node;
r = OK;
@ -100,9 +90,11 @@ int fs_bread(void)
position = fs_m_in.m_vfs_fs_breadwrite.seek_pos;
nrbytes = fs_m_in.m_vfs_fs_breadwrite.nbytes;
block_size = v_pri.logical_block_size_l;
dir = v_pri.dir_rec_root;
i_node = v_pri.inode_root;
if(rw_flag == WRITING)
return EIO; /* Not supported */
if(rw_flag == WRITING) return (EIO); /* Not supported */
rdwt_err = OK; /* set to EIO if disk error occurs */
cum_io = 0;
@ -111,14 +103,17 @@ int fs_bread(void)
off = (unsigned int)(position % block_size); /* offset in blk*/
chunk = MIN(nrbytes, block_size - off);
if (chunk < 0) chunk = block_size - off;
if (chunk < 0)
chunk = block_size - off;
/* Read 'chunk' bytes. */
r = read_chunk(dir, position, off, chunk, (unsigned) nrbytes,
r = read_chunk(i_node, position, off, chunk, (unsigned) nrbytes,
gid, cum_io, block_size, &completed, READING);
if (r != OK) break; /* EOF reached */
if (rdwt_err < 0) break;
if (r != OK)
break; /* EOF reached */
if (rdwt_err < 0)
break;
/* Update counters and pointers. */
nrbytes -= chunk; /* bytes yet to be read */
@ -128,220 +123,139 @@ int fs_bread(void)
fs_m_out.m_fs_vfs_breadwrite.seek_pos = position;
if (rdwt_err != OK) r = rdwt_err; /* check for disk error */
if (rdwt_err == END_OF_FILE) r = OK;
if (rdwt_err != OK)
r = rdwt_err; /* check for disk error */
if (rdwt_err == END_OF_FILE)
r = OK;
fs_m_out.m_fs_vfs_breadwrite.nbytes = cum_io;
return(r);
return r;
}
/*===========================================================================*
* fs_getdents *
*===========================================================================*/
int fs_getdents(void)
{
struct dir_record *dir;
struct inode *i_node, *i_node_tmp;
ino_t ino;
cp_grant_id_t gid;
size_t block_size;
off_t pos, block_pos, block, cur_pos, tmpbuf_offset, userbuf_off;
struct buf *bp;
struct dir_record *dir_tmp;
size_t old_pos = 0, cur_pos, new_pos, tmpbuf_off = 0, userbuf_off = 0, grant_size;
struct dirent *dirp;
int r,done,o,len,reclen;
int r, len, reclen;
char *cp;
char name[NAME_MAX + 1];
char name_old[NAME_MAX + 1];
/* Initialize the tmp arrays */
memset(name,'\0',NAME_MAX);
memset(name_old,'\0',NAME_MAX);
/* Get input parameters */
ino = fs_m_in.m_vfs_fs_getdents.inode;
gid = fs_m_in.m_vfs_fs_getdents.grant;
pos = fs_m_in.m_vfs_fs_getdents.seek_pos;
cur_pos = fs_m_in.m_vfs_fs_getdents.seek_pos;
grant_size = fs_m_in.m_vfs_fs_getdents.mem_size;
block_size = v_pri.logical_block_size_l;
cur_pos = pos; /* The current position */
tmpbuf_offset = 0;
userbuf_off = 0;
memset(getdents_buf, '\0', GETDENTS_BUFSIZ); /* Avoid leaking any data */
//memset(getdents_buf, '\0', GETDENTS_BUFSIZ); /* Avoid leaking any data */
if ((dir = get_dir_record(ino)) == NULL) return(EINVAL);
if ((i_node = get_inode(ino)) == NULL)
return EINVAL;
block = dir->loc_extent_l; /* First block of the directory */
block += pos / block_size; /* Shift to the block where start to read */
done = FALSE;
while (cur_pos<dir->d_file_size) {
bp = get_block(block); /* Get physical block */
if (bp == NULL) {
release_dir_record(dir);
return(EINVAL);
while (TRUE) {
i_node_tmp = alloc_inode();
r = read_inode(i_node_tmp, i_node->extent, cur_pos, &new_pos);
if ((r != OK) || (new_pos >= i_node->i_stat.st_size)) {
put_inode(i_node);
put_inode(i_node_tmp);
break;
}
block_pos = cur_pos % block_size; /* Position where to start read */
while (block_pos < block_size) {
dir_tmp = get_free_dir_record();
create_dir_record(dir_tmp,b_data(bp) + block_pos,
block*block_size + block_pos);
if (dir_tmp->length == 0) { /* EOF. I exit and return 0s */
block_pos = block_size;
done = TRUE;
release_dir_record(dir_tmp);
} else { /* The dir record is valid. Copy data... */
if (dir_tmp->file_id[0] == 0)
strlcpy(name, ".", NAME_MAX + 1);
else if (dir_tmp->file_id[0] == 1)
strlcpy(name, "..", NAME_MAX + 1);
else {
/* Extract the name from the field file_id */
strncpy(name, dir_tmp->file_id,
dir_tmp->length_file_id);
name[dir_tmp->length_file_id] = 0;
/* Tidy up file name */
cp = memchr(name, ';', NAME_MAX);
if (cp != NULL) name[cp - name] = 0;
/*If no file extension, then remove final '.'*/
if (name[strlen(name) - 1] == '.')
name[strlen(name) - 1] = '\0';
}
if (strcmp(name_old, name) == 0) {
cur_pos += dir_tmp->length;
release_dir_record(dir_tmp);
continue;
}
strlcpy(name_old, name, NAME_MAX + 1);
cur_pos = new_pos;
/* Compute the length of the name */
cp = memchr(name, '\0', NAME_MAX);
cp = memchr(i_node_tmp->i_name, '\0', NAME_MAX);
if (cp == NULL)
len = NAME_MAX;
else
len= cp - name;
len = cp - i_node_tmp->i_name;
/* Compute record length; also does alignment. */
reclen = _DIRENT_RECLEN(dirp, len);
/* If the new record does not fit, then copy the buffer
* and start from the beginning. */
if (tmpbuf_offset + reclen > GETDENTS_BUFSIZ) {
if (tmpbuf_off + reclen > GETDENTS_BUFSIZ ||
userbuf_off + tmpbuf_off + reclen > grant_size) {
r = sys_safecopyto(VFS_PROC_NR, gid, userbuf_off,
(vir_bytes)getdents_buf, tmpbuf_offset);
(vir_bytes)getdents_buf, tmpbuf_off);
if (r != OK)
panic("fs_getdents: sys_safecopyto failed: %d", r);
userbuf_off += tmpbuf_offset;
tmpbuf_offset= 0;
/* Check if the user grant buffer is filled. */
if (userbuf_off + tmpbuf_off + reclen > grant_size) {
fs_m_out.m_fs_vfs_getdents.nbytes = userbuf_off + tmpbuf_off;
fs_m_out.m_fs_vfs_getdents.seek_pos = old_pos;
return OK;
}
userbuf_off += tmpbuf_off;
tmpbuf_off = 0;
}
/* The standard data structure is created using the
* data in the buffer. */
dirp = (struct dirent *) &getdents_buf[tmpbuf_offset];
dirp->d_fileno = (u32_t)(b_data(bp) + (size_t)block_pos);
dirp = (struct dirent *) &getdents_buf[tmpbuf_off];
dirp->d_fileno = i_node_tmp->i_stat.st_ino;
dirp->d_reclen = reclen;
dirp->d_type = fs_mode_to_type(dir_tmp->d_mode);
dirp->d_type = fs_mode_to_type(i_node_tmp->i_stat.st_mode);
dirp->d_namlen = len;
memcpy(dirp->d_name, name, len);
memcpy(dirp->d_name, i_node_tmp->i_name, len);
dirp->d_name[len]= '\0';
tmpbuf_offset += reclen;
cur_pos += dir_tmp->length;
release_dir_record(dir_tmp);
tmpbuf_off += reclen;
put_inode(i_node_tmp);
old_pos = cur_pos;
}
block_pos += dir_tmp->length;
}
put_block(bp); /* release the block */
if (done == TRUE) break;
cur_pos += block_size - cur_pos;
block++; /* read the next one */
}
if (tmpbuf_offset != 0) {
if (tmpbuf_off != 0) {
r = sys_safecopyto(VFS_PROC_NR, gid, userbuf_off,
(vir_bytes) getdents_buf, tmpbuf_offset);
(vir_bytes) getdents_buf, tmpbuf_off);
if (r != OK)
panic("fs_getdents: sys_safecopyto failed: %d", r);
userbuf_off += tmpbuf_offset;
userbuf_off += tmpbuf_off;
}
fs_m_out.m_fs_vfs_getdents.nbytes = userbuf_off;
fs_m_out.m_fs_vfs_getdents.seek_pos = cur_pos;
release_dir_record(dir); /* release the inode */
return(OK);
return OK;
}
/*===========================================================================*
* read_chunk *
*===========================================================================*/
int read_chunk(dir, position, off, chunk, left, gid, buf_off, block_size, completed, rw)
register struct dir_record *dir;/* pointer to inode for file to be rd/wr */
u64_t position; /* position within file to read or write */
unsigned off; /* off within the current block */
int chunk; /* number of bytes to read or write */
unsigned left; /* max number of bytes wanted after position */
cp_grant_id_t gid; /* grant */
unsigned buf_off; /* offset in grant */
int block_size; /* block size of FS operating on */
int *completed; /* number of bytes copied */
int rw; /* READING or PEEKING */
int read_chunk(
struct inode *i_node, /* pointer to inode for file to be rd/wr */
u64_t position, /* position within file to read or write */
unsigned off, /* off within the current block */
int chunk, /* number of bytes to read or write */
unsigned left, /* max number of bytes wanted after position */
cp_grant_id_t gid, /* grant */
unsigned buf_off, /* offset in grant */
int block_size, /* block size of FS operating on */
int *completed, /* number of bytes copied */
int rw) /* READING or PEEKING */
{
register struct buf *bp;
register int r = OK;
block_t b;
int file_unit, rel_block, offset;
struct buf *bp;
int r = OK;
*completed = 0;
if ((ex64lo(position) <= dir->d_file_size) &&
(ex64lo(position) > dir->data_length_l)) {
while ((dir->d_next != NULL) && (ex64lo(position) > dir->data_length_l)) {
position -= dir->data_length_l;
dir = dir->d_next;
}
}
if (dir->inter_gap_size != 0) {
rel_block = (unsigned long)(position / block_size);
file_unit = rel_block / dir->data_length_l;
offset = rel_block % dir->file_unit_size;
b = dir->loc_extent_l + (dir->file_unit_size +
dir->inter_gap_size) * file_unit + offset;
} else {
b = dir->loc_extent_l + (unsigned long)(position / block_size);
/* Physical position to read. */
}
bp = get_block(b);
/* In all cases, bp now points to a valid buffer. */
if (bp == NULL) {
bp = read_extent_block(i_node->extent, position / block_size);
if (bp == NULL)
panic("bp not valid in rw_chunk; this can't happen");
}
if(rw == READING) {
r = sys_safecopyto(VFS_PROC_NR, gid, buf_off,
(vir_bytes) (b_data(bp)+off), (phys_bytes) chunk);
(vir_bytes) (b_data(bp)+off),
(phys_bytes) chunk);
}
put_block(bp);
return(r);
return r;
}

View file

@ -8,97 +8,25 @@
#include <minix/vfsif.h>
/*===========================================================================*
* stat_dir_record *
*===========================================================================*/
static int stat_dir_record(
register struct dir_record *dir, /* pointer to dir record to stat */
int pipe_pos, /* position in a pipe, supplied by fstat() */
endpoint_t who_e, /* Caller endpoint */
cp_grant_id_t gid /* grant for the stat buf */
)
{
/* This function returns all the info about a particular inode. It's missing
* the recording date because of a bug in the standard functions stdtime.
* Once the bug is fixed the function can be called inside this function to
* return the date. */
/* Common code for stat and fstat system calls. */
struct stat statbuf;
int r;
struct tm ltime;
time_t time1;
u32_t blocks;
blocks = v_pri.volume_space_size_l;
/* The unit of blocks should be 512 */
assert(v_pri.logical_block_size_l >= 512);
blocks = blocks * (v_pri.logical_block_size_l >> 9);
memset(&statbuf, 0, sizeof(struct stat));
statbuf.st_dev = fs_dev; /* the device of the file */
statbuf.st_ino = ID_DIR_RECORD(dir); /* the id of the dir record */
statbuf.st_mode = dir->d_mode; /* flags of the file */
statbuf.st_nlink = dir->d_count; /* times this file is used */
statbuf.st_uid = 0; /* user root */
statbuf.st_gid = 0; /* group operator */
statbuf.st_rdev = NO_DEV;
statbuf.st_size = dir->d_file_size; /* size of the file */
statbuf.st_blksize = v_pri.logical_block_size_l;
statbuf.st_blocks = blocks;
ltime.tm_year = dir->rec_date[0];
ltime.tm_mon = dir->rec_date[1] - 1;
ltime.tm_mday = dir->rec_date[2];
ltime.tm_hour = dir->rec_date[3];
ltime.tm_min = dir->rec_date[4];
ltime.tm_sec = dir->rec_date[5];
ltime.tm_isdst = 0;
if (dir->rec_date[6] != 0)
ltime.tm_hour += dir->rec_date[6] / 4;
time1 = mktime(&ltime);
statbuf.st_atime = time1;
statbuf.st_mtime = time1;
statbuf.st_ctime = time1;
/* Copy the struct to user space. */
r = sys_safecopyto(who_e, gid, 0, (vir_bytes) &statbuf,
(phys_bytes) sizeof(statbuf));
return(r);
}
/*===========================================================================*
* fs_stat *
*===========================================================================*/
int fs_stat()
{
register int r; /* return value */
struct dir_record *dir;
r = EINVAL;
int r = EINVAL; /* return value */
struct inode *dir;
if ((dir = get_dir_record(fs_m_in.m_vfs_fs_stat.inode)) != NULL) {
r = stat_dir_record(dir, 0, fs_m_in.m_source, fs_m_in.m_vfs_fs_stat.grant);
release_dir_record(dir);
if ((dir = get_inode(fs_m_in.m_vfs_fs_stat.inode)) != NULL) {
r = sys_safecopyto(fs_m_in.m_source, fs_m_in.m_vfs_fs_stat.grant,
0, (vir_bytes) &dir->i_stat,
(phys_bytes) sizeof(dir->i_stat));
put_inode(dir);
}
return(r);
return r;
}
/*===========================================================================*
* fs_statvfs *
*===========================================================================*/
int fs_statvfs()
{
struct statvfs st;
int r;
struct statvfs st;
memset(&st, 0, sizeof(st));
@ -112,12 +40,9 @@ int fs_statvfs()
r = sys_safecopyto(fs_m_in.m_source, fs_m_in.m_vfs_fs_statvfs.grant, 0,
(vir_bytes) &st, (phys_bytes) sizeof(st));
return(r);
return r;
}
/*===========================================================================*
* blockstats *
*===========================================================================*/
void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used)
{
*used = *blocks = v_pri.volume_space_size_l;

View file

@ -1,5 +1,7 @@
/* Functions to manage the superblock of the filesystem. These functions are
* are called at the beginning and at the end of the server. */
/*
* Functions to manage the superblock of the filesystem. These functions are
* are called at the beginning and at the end of the server.
*/
#include "inc.h"
#include <string.h>
@ -7,112 +9,104 @@
#include <minix/u64.h>
#include <minix/bdev.h>
/* This function is called when the filesystem is umounted. It releases the
* super block. */
int release_v_pri(v_pri)
register struct iso9660_vd_pri *v_pri;
int release_vol_pri_desc(struct iso9660_vol_pri_desc *vol_pri)
{
/* Release the root dir record */
release_dir_record(v_pri->dir_rec_root);
v_pri->count = 0;
/* Release the root dir root. */
if (vol_pri->i_count > 0) {
put_inode(vol_pri->inode_root);
vol_pri->inode_root = NULL;
vol_pri->i_count = 0;
}
return OK;
}
/* This function fullfill the super block data structure using the information
* contained in the stream buf. Such stream is physically read from the device
* . */
int create_v_pri(v_pri,buf,address)
register struct iso9660_vd_pri *v_pri;
register char* buf;
register unsigned long address;
int create_vol_pri_desc(struct iso9660_vol_pri_desc *vol_pri, char *buf,
size_t address)
{
struct dir_record *dir;
/*
* This function fullfill the super block data structure using the
* information contained in the buffer.
*/
struct iso9660_dir_record *root_record;
struct inode *root;
struct dir_extent *extent;
v_pri->vd_type = buf[0];
memcpy(v_pri->standard_id,buf + 1,sizeof(v_pri->standard_id));
v_pri->vd_version = buf[6];
memcpy(v_pri->system_id,buf + 8,sizeof(v_pri->system_id));
memcpy(v_pri->volume_id,buf + 40,sizeof(v_pri->volume_id));
memcpy(&v_pri->volume_space_size_l,buf + 80,
sizeof(v_pri->volume_space_size_l));
memcpy(&v_pri->volume_space_size_m,buf + 84,
sizeof(v_pri->volume_space_size_m));
memcpy(&v_pri->volume_set_size,buf + 120,sizeof(v_pri->volume_set_size));
memcpy(&v_pri->volume_sequence_number,buf + 124,
sizeof(v_pri->volume_sequence_number));
memcpy(&v_pri->logical_block_size_l,buf + 128,
sizeof(v_pri->logical_block_size_l));
memcpy(&v_pri->logical_block_size_m,buf + 130,
sizeof(v_pri->logical_block_size_m));
memcpy(&v_pri->path_table_size_l,buf + 132,
sizeof(v_pri->path_table_size_l));
memcpy(&v_pri->path_table_size_m,buf + 136,
sizeof(v_pri->path_table_size_m));
memcpy(&v_pri->loc_l_occ_path_table,buf + 140,
sizeof(v_pri->loc_l_occ_path_table));
memcpy(&v_pri->loc_opt_l_occ_path_table,buf + 144,
sizeof(v_pri->loc_opt_l_occ_path_table));
memcpy(&v_pri->loc_m_occ_path_table, buf + 148,
sizeof(v_pri->loc_m_occ_path_table));
memcpy(&v_pri->loc_opt_m_occ_path_table,buf + 152,
sizeof(v_pri->loc_opt_m_occ_path_table));
if (vol_pri->i_count > 0)
release_vol_pri_desc(vol_pri);
dir = get_free_dir_record();
if (dir == NULL) return EINVAL;
create_dir_record(dir,buf + 156,(u32_t)(address + 156));
v_pri->dir_rec_root = dir;
dir->d_ino_nr = ROOT_INO_NR;
memcpy(vol_pri, buf, 2048);
/* Check various fields for consistency. */
if ((memcmp(vol_pri->standard_id, "CD001", ISO9660_SIZE_STANDARD_ID) != 0) ||
(vol_pri->vd_version != 1) ||
(vol_pri->logical_block_size_l < 2048) ||
(vol_pri->file_struct_ver != 1))
return EINVAL;
lmfs_set_blocksize(vol_pri->logical_block_size_l, major(fs_dev));
/* Read root directory record. */
root_record = (struct iso9660_dir_record *)vol_pri->root_directory;
root = alloc_inode();
extent = alloc_extent();
extent->location = root_record->loc_extent_l + root_record->ext_attr_rec_length;
extent->length = root_record->data_length_l / vol_pri->logical_block_size_l;
if (root_record->data_length_l % vol_pri->logical_block_size_l)
extent->length++;
if (read_inode(root, extent, 0, NULL) != OK) {
free_extent(extent);
put_inode(root);
return EINVAL;
}
free_extent(extent);
vol_pri->inode_root = root;
vol_pri->i_count = 1;
memcpy(v_pri->volume_set_id,buf + 190,sizeof(v_pri->volume_set_id));
memcpy(v_pri->publisher_id,buf + 318,sizeof(v_pri->publisher_id));
memcpy(v_pri->data_preparer_id,buf + 446,sizeof(v_pri->data_preparer_id));
memcpy(v_pri->application_id,buf + 574,sizeof(v_pri->application_id));
memcpy(v_pri->copyright_file_id,buf + 702,sizeof(v_pri->copyright_file_id));
memcpy(v_pri->abstract_file_id,buf + 739,sizeof(v_pri->abstract_file_id));
memcpy(v_pri->bibl_file_id,buf + 776,sizeof(v_pri->bibl_file_id));
memcpy(v_pri->volume_cre_date,buf + 813,sizeof(v_pri->volume_cre_date));
memcpy(v_pri->volume_mod_date,buf + 830,sizeof(v_pri->volume_mod_date));
memcpy(v_pri->volume_exp_date,buf + 847,sizeof(v_pri->volume_exp_date));
memcpy(v_pri->volume_eff_date,buf + 864,sizeof(v_pri->volume_eff_date));
v_pri->file_struct_ver = buf[881];
return OK;
}
/* This function reads from a ISO9660 filesystem (in the device dev) the
* super block and saves it in v_pri. */
int read_vds(
register struct iso9660_vd_pri *v_pri,
register dev_t dev
)
int read_vds(struct iso9660_vol_pri_desc *vol_pri, dev_t dev)
{
u64_t offset;
int vol_ok = FALSE;
/*
* This function reads from a ISO9660 filesystem (in the device dev) the
* super block and saves it in vol_pri.
*/
size_t offset;
int vol_ok = FALSE, vol_pri_flag = FALSE;
int r;
static char sbbuf[ISO9660_MIN_BLOCK_SIZE];
int i = 0;
offset = ((u64_t)(ISO9660_SUPER_BLOCK_POSITION));
while (!vol_ok && i++<MAX_ATTEMPTS) {
for(offset = ISO9660_SUPER_BLOCK_POSITION; !vol_ok && i++ < MAX_ATTEMPTS;
offset += ISO9660_MIN_BLOCK_SIZE) {
/* Read the sector of the super block. */
r = bdev_read(dev, offset, sbbuf, ISO9660_MIN_BLOCK_SIZE, BDEV_NOFLAGS);
if (r != ISO9660_MIN_BLOCK_SIZE) /* Damaged sector or what? */
continue;
if (r != ISO9660_MIN_BLOCK_SIZE) {
/* Damaged sector or what? */
return EINVAL;
}
if ((sbbuf[0] & BYTE) == VD_PRIMARY) {
create_v_pri(v_pri,sbbuf,offset); /* copy the buffer in the data structure. */
/* Copy the buffer in the data structure. */
if (create_vol_pri_desc(vol_pri, sbbuf, offset) == OK) {
vol_pri_flag = TRUE;
}
}
if ((sbbuf[0] & BYTE) == VD_SET_TERM)
if ((sbbuf[0] & BYTE) == VD_SET_TERM) {
/* I dont need to save anything about it */
vol_ok = TRUE;
offset += ISO9660_MIN_BLOCK_SIZE;
}
}
if (vol_ok == FALSE)
if (vol_ok == FALSE || vol_pri_flag == FALSE)
return EINVAL; /* If no superblock was found... */
else
return OK; /* otherwise. */
}

View file

@ -1,4 +1,4 @@
/* This file contains the definitions of a ISO9660 structures */
/* This file contains the definitions of ISO9660 volume descriptors. */
#include "inode.h"
#define VD_BOOT_RECORD 0
@ -9,19 +9,27 @@
#define MAX_ATTEMPTS 20 /* # attempts to read the volume descriptors.
* After it gives up */
#define ROOT_INO_NR 1
/* Structure for the primary volume descriptor */
struct iso9660_vd_pri {
/* Structure for the primary volume descriptor. */
struct iso9660_vol_pri_desc {
/*
* On-disk structure format of the primary volume descriptor,
* 2048 bytes long. See ISO specs for details.
*/
u8_t vd_type;
char standard_id[ISO9660_SIZE_STANDARD_ID];
u8_t vd_version;
u8_t pad1;
char system_id[ISO9660_SIZE_SYS_ID];
char volume_id[ISO9660_SIZE_VOLUME_ID];
u8_t pad2[8];
u32_t volume_space_size_l;
u32_t volume_space_size_m;
u32_t volume_set_size;
u32_t volume_sequence_number;
u8_t pad3[32];
u16_t volume_set_size_l;
u16_t volume_set_size_m;
u16_t volume_sequence_number_l;
u16_t volume_sequence_number_m;
u16_t logical_block_size_l;
u16_t logical_block_size_m;
u32_t path_table_size_l;
@ -30,7 +38,7 @@ struct iso9660_vd_pri {
u32_t loc_opt_l_occ_path_table;
u32_t loc_m_occ_path_table;
u32_t loc_opt_m_occ_path_table;
struct dir_record *dir_rec_root;
u8_t root_directory[34];
char volume_set_id[ISO9660_SIZE_VOLUME_SET_ID];
char publisher_id[ISO9660_SIZE_PUBLISHER_ID];
char data_preparer_id[ISO9660_SIZE_DATA_PREP_ID];
@ -38,11 +46,18 @@ struct iso9660_vd_pri {
char copyright_file_id[ISO9660_SIZE_COPYRIGHT_FILE_ID];
char abstract_file_id[ISO9660_SIZE_ABSTRACT_FILE_ID];
char bibl_file_id[ISO9660_SIZE_BIBL_FILE_ID];
char volume_cre_date[ISO9660_SIZE_VOL_CRE_DATE];
char volume_mod_date[ISO9660_SIZE_VOL_MOD_DATE];
char volume_exp_date[ISO9660_SIZE_VOL_EXP_DATE];
char volume_eff_date[ISO9660_SIZE_VOL_EFF_DATE];
char volume_cre_date[ISO9660_SIZE_DATE17];
char volume_mod_date[ISO9660_SIZE_DATE17];
char volume_exp_date[ISO9660_SIZE_DATE17];
char volume_eff_date[ISO9660_SIZE_DATE17];
u8_t file_struct_ver;
/* The rest is either not specified or reserved */
u8_t count;
} v_pri;
u8_t reserved1;
u8_t application_use[512];
u8_t reserved2[652];
/* End of the on-disk structure format. */
struct inode *inode_root;
int i_count;
} __attribute__((packed)) v_pri;

130
minix/fs/iso9660fs/susp.c Normal file
View file

@ -0,0 +1,130 @@
/*
* This file contains support for System Use Sharing Protocol (SUSP) extension
* to ISO 9660.
*/
#include "inc.h"
#include <sys/stat.h>
int parse_susp(struct rrii_dir_record *dir, char *buffer)
{
/* Parse fundamental SUSP entries */
char susp_signature[2];
u8_t susp_length;
u8_t susp_version;
u32_t ca_block_nr;
u32_t ca_offset;
u32_t ca_length;
struct buf *ca_bp;
susp_signature[0] = buffer[0];
susp_signature[1] = buffer[1];
susp_length = *((u8_t*)buffer + 2);
susp_version = *((u8_t*)buffer + 3);
if ((susp_signature[0] == 'C') && (susp_signature[1] == 'E') &&
(susp_length >= 28) && (susp_version >= 1)) {
/*
* Continuation area, perform a recursion.
*
* FIXME: Currently we're parsing only first logical block of a
* continuation area, and infinite recursion is not checked.
*/
ca_block_nr = *((u32_t*)(buffer + 4));
ca_offset = *((u32_t*)(buffer + 12));
ca_length = *((u32_t*)(buffer + 20));
/* Truncate continuation area to fit one logical block. */
if (ca_offset >= v_pri.logical_block_size_l) {
return EINVAL;
}
if (ca_offset + ca_length > v_pri.logical_block_size_l) {
ca_length = v_pri.logical_block_size_l - ca_offset;
}
ca_bp = get_block(ca_block_nr);
if (ca_bp == NULL) {
return EINVAL;
}
parse_susp_buffer(dir, b_data(ca_bp) + ca_offset, ca_length);
put_block(ca_bp);
return OK;
}
else if ((susp_signature[0] == 'P') && (susp_signature[1] == 'D')) {
/* Padding, skip. */
return OK;
}
else if ((susp_signature[0] == 'S') && (susp_signature[1] == 'P')) {
/* Ignored, skip. */
return OK;
}
else if ((susp_signature[0] == 'S') && (susp_signature[1] == 'T')) {
/* Terminator entry, stop processing. */
return(ECANCELED);
}
else if ((susp_signature[0] == 'E') && (susp_signature[1] == 'R')) {
/* Ignored, skip. */
return OK;
}
else if ((susp_signature[0] == 'E') && (susp_signature[1] == 'S')) {
/* Ignored, skip. */
return OK;
}
/* Not a SUSP fundamental entry. */
return EINVAL;
}
void parse_susp_buffer(struct rrii_dir_record *dir, char *buffer, u32_t size)
{
/*
* Parse a SUSP system use entry for the ISO 9660.
* This is the main entry point for parsing SUSP data : SUSP entries are
* routed from here to the relevant handling functions.
*/
char susp_signature[2];
u8_t susp_length;
int parser_return;
while (TRUE) {
/* A SUSP entry can't be smaller than 4 bytes. */
if (size < 4)
return;
susp_signature[0] = buffer[0];
susp_signature[1] = buffer[1];
susp_length = *((u8_t*)buffer + 2);
/* Check if SUSP entry is present. */
if (((susp_signature[0] == 0) && (susp_signature[1] == 0)) ||
(susp_length > size) || (susp_length < 4))
return;
/* Check for SUSP fundamental entry. */
parser_return = parse_susp(dir, buffer);
if (parser_return == ECANCELED)
return;
else if (parser_return == OK)
goto next_entry;
/* Check for Rock Ridge entry. */
if (opt.norock == FALSE) {
parser_return = parse_susp_rock_ridge(dir, buffer);
if (parser_return == ECANCELED)
return;
else if (parser_return == OK)
goto next_entry;
}
/* Parse next SUSP entry. */
next_entry:
buffer += susp_length;
size -= susp_length;
}
}

View file

@ -0,0 +1,248 @@
/*
* This file contains support for Rock Ridge Interchange Protocol (RRIP)
* extension to ISO 9660.
*/
#include "inc.h"
#include <sys/stat.h>
void parse_susp_rock_ridge_sl(struct rrii_dir_record *dir, char *buffer, int length)
{
/* Parse a Rock Ridge SUSP symbolic link entry (SL). */
int offset = 0;
int slink_size;
u8_t flags, component_length;
while (offset + 2 <= length) {
flags = *((u8_t*)(buffer + offset));
component_length = *((u8_t*)(buffer + offset + 1));
/* Add directory separator if necessary. */
if (dir->slink_rrip[0] != '\0') {
slink_size = strlen(dir->slink_rrip);
if (slink_size + 2 >= ISO9660_RRIP_MAX_FILE_ID_LEN)
return;
dir->slink_rrip[slink_size] = '/';
slink_size++;
}
else
slink_size = strlen(dir->slink_rrip);
switch (flags & 0xF) {
case 0:
case 1: {
/*
* Directory path component.
* Check if component fits within SL entry and
* within symbolic link field.
*/
if ((component_length > length - offset) ||
(slink_size + component_length + 1 >=
ISO9660_RRIP_MAX_FILE_ID_LEN)) {
return;
}
strlcpy(dir->slink_rrip + slink_size,
buffer + offset + 2, component_length+1);
break;
}
case 2: {
/* Current directory path component. */
if (slink_size + 2 >=
ISO9660_RRIP_MAX_FILE_ID_LEN) {
return;
}
strcat(dir->slink_rrip + slink_size, ".");
break;
}
case 4: {
/* Parent directory path component. */
if (slink_size + 3 >=
ISO9660_RRIP_MAX_FILE_ID_LEN) {
return;
}
strcat(dir->slink_rrip + slink_size, "..");
break;
}
case 8: {
/* Root directory path component relative to
the current process. */
if (slink_size + 2 >=
ISO9660_RRIP_MAX_FILE_ID_LEN) {
return;
}
strcat(dir->slink_rrip + slink_size, "/");
break;
}
default: {
/* Unsupported/invalid flags. */
return;
}
}
offset += component_length + 2;
}
}
int parse_susp_rock_ridge(struct rrii_dir_record *dir, char *buffer)
{
/* Parse Rock Ridge SUSP entries for a directory entry. */
char susp_signature[2];
u8_t susp_length;
u8_t susp_version;
int rrii_name_current_size;
int rrii_name_append_size;
int rrii_tf_flags;
int rrii_tf_offset;
u32_t rrii_pn_rdev_major;
u32_t rrii_pn_rdev_minor;
mode_t rrii_px_posix_mode;
susp_signature[0] = buffer[0];
susp_signature[1] = buffer[1];
susp_length = *((u8_t*)buffer + 2);
susp_version = *((u8_t*)buffer + 3);
if ((susp_signature[0] == 'P') && (susp_signature[1] == 'X') &&
(susp_length >= 36) && (susp_version >= 1)) {
/* POSIX file mode, UID and GID. */
rrii_px_posix_mode = *((u32_t*)(buffer + 4));
/* Check if file mode is supported by isofs. */
switch (rrii_px_posix_mode & _S_IFMT) {
case S_IFCHR:
case S_IFBLK:
case S_IFREG:
case S_IFDIR:
case S_IFLNK: {
dir->d_mode = rrii_px_posix_mode & _S_IFMT;
break;
}
default: {
/* Fall back to what ISO 9660 said. */
dir->d_mode &= _S_IFMT;
break;
}
}
dir->d_mode |= rrii_px_posix_mode & 07777;
dir->uid = *((u32_t*)(buffer + 20));
dir->gid = *((u32_t*)(buffer + 28));
return OK;
}
else if ((susp_signature[0] == 'P') && (susp_signature[1] == 'N') &&
(susp_length >= 20) && (susp_version >= 1)) {
/* Device ID (for character or block special inode). */
rrii_pn_rdev_major = *((u32_t*)(buffer + 4));
rrii_pn_rdev_minor = *((u32_t*)(buffer + 12));
dir->rdev = makedev(rrii_pn_rdev_major, rrii_pn_rdev_minor);
return OK;
}
else if ((susp_signature[0] == 'S') && (susp_signature[1] == 'L') &&
(susp_length > 5) && (susp_version >= 1)) {
/* Symbolic link target. Multiple entries may be used to
concatenate the complete path target. */
parse_susp_rock_ridge_sl(dir, buffer + 5, susp_length - 5);
return OK;
}
else if ((susp_signature[0] == 'N') && (susp_signature[1] == 'M') &&
(susp_length > 5) && (susp_version >= 1)) {
/* Alternate POSIX name. Multiple entries may be used to
concatenate the complete filename. */
rrii_name_current_size = strlen(dir->file_id_rrip);
rrii_name_append_size = susp_length - 5;
/* Concatenate only if name component fits. */
if (rrii_name_current_size + rrii_name_append_size + 1 <
ISO9660_RRIP_MAX_FILE_ID_LEN) {
strlcpy(dir->file_id_rrip + rrii_name_current_size,
buffer + 5, rrii_name_append_size+1);
}
return OK;
}
else if ((susp_signature[0] == 'C') && (susp_signature[1] == 'L')) {
/* Ignored, skip. */
return OK;
}
else if ((susp_signature[0] == 'P') && (susp_signature[1] == 'L')) {
/* Ignored, skip. */
return OK;
}
else if ((susp_signature[0] == 'R') && (susp_signature[1] == 'E')) {
/* Ignored, skip. */
return OK;
}
else if ((susp_signature[0] == 'T') && (susp_signature[1] == 'F') &&
(susp_length >= 5) && (susp_version >= 1)) {
/* POSIX timestamp. */
rrii_tf_flags = buffer[5];
rrii_tf_offset = 5;
/*
* ISO 9660 17-byte time format.
* FIXME: 17-byte time format not supported in TF entry.
*/
if (rrii_tf_flags & (1 << 7)) { }
/* ISO 9660 7-byte time format. */
else {
/* Creation time */
if ((rrii_tf_flags & (1 << 0)) &&
(rrii_tf_offset + ISO9660_SIZE_DATE7 <= susp_length)) {
memcpy(dir->birthtime, buffer+rrii_tf_offset,
ISO9660_SIZE_DATE7);
rrii_tf_offset += ISO9660_SIZE_DATE7;
}
/* Modification time */
if ((rrii_tf_flags & (1 << 1)) &&
(rrii_tf_offset + ISO9660_SIZE_DATE7 <= susp_length)) {
memcpy(dir->mtime, buffer+rrii_tf_offset,
ISO9660_SIZE_DATE7);
rrii_tf_offset += ISO9660_SIZE_DATE7;
}
/* Last access time. */
if ((rrii_tf_flags & (1 << 2)) &&
(rrii_tf_offset + ISO9660_SIZE_DATE7 <= susp_length)) {
memcpy(dir->atime, buffer+rrii_tf_offset,
ISO9660_SIZE_DATE7);
rrii_tf_offset += ISO9660_SIZE_DATE7;
}
/* Last attribute change time. */
if ((rrii_tf_flags & (1 << 3)) &&
(rrii_tf_offset + ISO9660_SIZE_DATE7 <= susp_length)) {
memcpy(dir->ctime, buffer+rrii_tf_offset,
ISO9660_SIZE_DATE7);
rrii_tf_offset += ISO9660_SIZE_DATE7;
}
/* The rest is ignored. */
}
return OK;
}
else if ((susp_signature[0] == 'S') && (susp_signature[1] == 'F')) {
/* Ignored, skip. */
return OK;
}
/* Not a Rock Ridge entry. */
return EINVAL;
}

View file

@ -1,5 +1,6 @@
/* This file contains the table used to map system call numbers onto the
/*
* This file contains the table used to map system call numbers onto the
* routines that perform them.
*/
@ -38,13 +39,9 @@ int (*fs_call_vec[])(void) = {
fs_mountpoint, /* 27 */
fs_readsuper, /* 28 */
no_sys, /* 29: not used */
no_sys, /* 30: not used */
fs_rdlink, /* 30 */
fs_getdents, /* 31 */
#if 0
fs_read, /* 32 */
no_sys, /* 33 */
#else
no_sys, /* 32 */
no_sys, /* 33 */
#endif
} ;

View file

@ -5,21 +5,99 @@
#include <minix/callnr.h>
#include <minix/vfsif.h>
/*===========================================================================*
* do_noop *
*===========================================================================*/
static struct dir_extent dir_extents[NR_DIR_EXTENT_RECORDS];
struct dir_extent* alloc_extent()
{
/* Return a free extent from the pool. */
int i;
struct dir_extent *extent;
for (i = 0; i < NR_DIR_EXTENT_RECORDS; i++) {
extent = &dir_extents[i];
if (extent->in_use == 0) {
memset(extent, 0, sizeof(*extent));
extent->in_use = 1;
return extent;
}
}
panic("No free extents in cache");
}
void free_extent(struct dir_extent *e)
{
if (e == NULL)
return;
if (e->in_use == 0)
panic("Trying to free unused extent");
free_extent(e->next);
e->in_use = 0;
}
struct buf* read_extent_block(struct dir_extent *e, size_t block)
{
size_t block_id = get_extent_absolute_block_id(e, block);
if (block_id == 0 || block_id >= v_pri.volume_space_size_l)
return NULL;
return get_block(block_id);
}
size_t get_extent_absolute_block_id(struct dir_extent *e, size_t block)
{
size_t extent_offset = 0;
if (e == NULL)
return 0;
/* Retrieve the extent on which the block lies. */
while(block > extent_offset + e->length) {
if (e->next == NULL)
return 0;
extent_offset += e->length;
e = e->next;
}
return e->location + block - extent_offset;
}
time_t date7_to_time_t(const u8_t *date)
{
/* This function converts from the ISO 9660 7-byte time format to a time_t. */
struct tm ltime;
signed char time_zone = (signed char)date[6];
ltime.tm_year = date[0];
ltime.tm_mon = date[1] - 1;
ltime.tm_mday = date[2];
ltime.tm_hour = date[3];
ltime.tm_min = date[4];
ltime.tm_sec = date[5];
ltime.tm_isdst = 0;
/* Offset from Greenwich Mean Time */
if (time_zone >= -52 && time_zone <= 52)
ltime.tm_hour += time_zone;
return mktime(&ltime);
}
int do_noop(void)
{
/* Do not do anything. */
return(OK);
return OK;
}
/*===========================================================================*
* no_sys *
*===========================================================================*/
int no_sys(void)
{
/* Somebody has used an illegal system call number */
return(EINVAL);
return EINVAL;
}