/*
* init_file_inode()
*
* Given an HFS catalog entry initialize an inode for a file.
*/
static void init_file_inode(struct inode *inode, hfs_u8 fork)
{
struct hfs_fork *fk;
struct hfs_cat_entry *entry = HFS_I(inode)->entry;
if (fork == HFS_FK_DATA) {
inode->i_mode = S_IRWXUGO | S_IFREG;
} else {
inode->i_mode = S_IRUGO | S_IWUGO | S_IFREG;
}
if (fork == HFS_FK_DATA) {
#if 0 /* XXX: disable crlf translations for now */
hfs_u32 type = hfs_get_nl(entry->info.file.finfo.fdType);
HFS_I(inode)->convert =
((HFS_SB(inode->i_sb)->s_conv == 't') ||
((HFS_SB(inode->i_sb)->s_conv == 'a') &&
((type == htonl(0x54455854)) || /* "TEXT" */
(type == htonl(0x7474726f))))); /* "ttro" */
#else
HFS_I(inode)->convert = 0;
#endif
fk = &entry->u.file.data_fork;
} else {
fk = &entry->u.file.rsrc_fork;
HFS_I(inode)->convert = 0;
}
HFS_I(inode)->fork = fk;
inode->i_size = fk->lsize;
inode->i_blocks = fk->psize;
inode->i_nlink = 1;
}
/*
* parse_old_part_table()
*
* Parse a old style partition map looking for the
* start and length of the 'part'th HFS partition.
*/
static int parse_old_part_table(hfs_sysmdb sys_mdb, hfs_buffer buf,
int part, hfs_s32 *size, hfs_s32 *start)
{
struct old_pmap *pm = (struct old_pmap *)hfs_buffer_data(buf);
struct old_pmap_entry *p = &pm->pdEntry[0];
int hfs_part = 0;
while ((p->pdStart || p->pdSize || p->pdFSID) && !(*start)) {
/* look for an HFS partition */
if ((hfs_get_nl(p->pdFSID) == htonl(0x54465331)/*"TFS1"*/) &&
((hfs_part++) == part)) {
/* Found it! */
*start = hfs_get_hl(p->pdStart);
*size = hfs_get_hl(p->pdSize);
}
++p;
}
hfs_buffer_put(buf);
return 0;
}
/*
* cap_readdir()
*
* This is the readdir() entry in the file_operations structure for
* HFS directories in the CAP scheme. The purpose is to enumerate the
* entries in a directory, given the inode of the directory and a
* (struct file *), the 'f_pos' field of which indicates the location
* in the directory. The (struct file *) is updated so that the next
* call with the same 'dir' and 'filp' arguments will produce the next
* directory entry. The entries are returned in 'dirent', which is
* "filled-in" by calling filldir(). This allows the same readdir()
* function be used for different dirent formats. We try to read in
* as many entries as we can before filldir() refuses to take any more.
*
* XXX: In the future it may be a good idea to consider not generating
* metadata files for covered directories since the data doesn't
* correspond to the mounted directory. However this requires an
* iget() for every directory which could be considered an excessive
* amount of overhead. Since the inode for a mount point is always
* in-core this is another argument for a call to get an inode if it
* is in-core or NULL if it is not.
*/
static int cap_readdir(struct file * filp,
void * dirent, filldir_t filldir)
{
ino_t type;
int skip_dirs;
struct hfs_brec brec;
struct hfs_cat_entry *entry;
struct inode *dir = filp->f_dentry->d_inode;
entry = HFS_I(dir)->entry;
type = HFS_ITYPE(dir->i_ino);
skip_dirs = (type == HFS_CAP_RDIR);
if (filp->f_pos == 0) {
/* Entry 0 is for "." */
if (filldir(dirent, DOT->Name, DOT_LEN, 0, dir->i_ino, DT_DIR)) {
return 0;
}
filp->f_pos = 1;
}
if (filp->f_pos == 1) {
/* Entry 1 is for ".." */
hfs_u32 cnid;
if (type == HFS_CAP_NDIR) {
cnid = hfs_get_nl(entry->key.ParID);
} else {
cnid = entry->cnid;
}
if (filldir(dirent, DOT_DOT->Name,
DOT_DOT_LEN, 1, ntohl(cnid), DT_DIR)) {
return 0;
}
filp->f_pos = 2;
}
if (filp->f_pos < (dir->i_size - 3)) {
hfs_u32 cnid;
hfs_u8 type;
if (hfs_cat_open(entry, &brec) ||
hfs_cat_next(entry, &brec, filp->f_pos - 2, &cnid, &type)) {
return 0;
}
while (filp->f_pos < (dir->i_size - 3)) {
if (hfs_cat_next(entry, &brec, 1, &cnid, &type)) {
return 0;
}
if (!skip_dirs || (type != HFS_CDR_DIR)) {
ino_t ino;
unsigned int len;
unsigned char tmp_name[HFS_NAMEMAX];
ino = ntohl(cnid) | HFS_I(dir)->file_type;
len = hfs_namein(dir, tmp_name,
&((struct hfs_cat_key *)brec.key)->CName);
if (filldir(dirent, tmp_name, len,
filp->f_pos, ino, DT_UNKNOWN)) {
hfs_cat_close(entry, &brec);
return 0;
}
}
++filp->f_pos;
}
hfs_cat_close(entry, &brec);
}
if (filp->f_pos == (dir->i_size - 3)) {
if ((entry->cnid == htonl(HFS_ROOT_CNID)) &&
(type == HFS_CAP_NDIR)) {
/* In root dir last-2 entry is for ".rootinfo" */
if (filldir(dirent, DOT_ROOTINFO->Name,
DOT_ROOTINFO_LEN, filp->f_pos,
ntohl(entry->cnid) | HFS_CAP_FNDR,
DT_UNKNOWN)) {
return 0;
}
}
++filp->f_pos;
}
if (filp->f_pos == (dir->i_size - 2)) {
if (type == HFS_CAP_NDIR) {
/* In normal dirs last-1 entry is for ".finderinfo" */
if (filldir(dirent, DOT_FINDERINFO->Name,
DOT_FINDERINFO_LEN, filp->f_pos,
ntohl(entry->cnid) | HFS_CAP_FDIR,
DT_UNKNOWN)) {
return 0;
}
}
++filp->f_pos;
}
if (filp->f_pos == (dir->i_size - 1)) {
if (type == HFS_CAP_NDIR) {
/* In normal dirs last entry is for ".resource" */
if (filldir(dirent, DOT_RESOURCE->Name,
DOT_RESOURCE_LEN, filp->f_pos,
ntohl(entry->cnid) | HFS_CAP_RDIR,
DT_UNKNOWN)) {
return 0;
}
}
++filp->f_pos;
}
return 0;
}
/*
* parse_options()
*
* adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger
* This function is called by hfs_read_super() to parse the mount options.
*/
static int parse_options(char *options, struct hfs_sb_info *hsb, int *part)
{
char *this_char, *value;
char names, fork;
/* initialize the sb with defaults */
memset(hsb, 0, sizeof(*hsb));
hsb->magic = HFS_SB_MAGIC;
hsb->s_uid = current->uid;
hsb->s_gid = current->gid;
hsb->s_umask = current->fs->umask;
hsb->s_type = 0x3f3f3f3f; /* == '????' */
hsb->s_creator = 0x3f3f3f3f; /* == '????' */
hsb->s_lowercase = 0;
hsb->s_quiet = 0;
hsb->s_afpd = 0;
/* default version. 0 just selects the defaults */
hsb->s_version = 0;
hsb->s_conv = 'b';
names = '?';
fork = '?';
*part = 0;
if (!options) {
goto done;
}
for (this_char = strtok(options,","); this_char;
this_char = strtok(NULL,",")) {
if ((value = strchr(this_char,'=')) != NULL) {
*value++ = 0;
}
/* Numeric-valued options */
if (!strcmp(this_char, "version")) {
if (!value || !*value) {
return 0;
}
hsb->s_version = simple_strtoul(value,&value,0);
if (*value) {
return 0;
}
} else if (!strcmp(this_char,"uid")) {
if (!value || !*value) {
return 0;
}
hsb->s_uid = simple_strtoul(value,&value,0);
if (*value) {
return 0;
}
} else if (!strcmp(this_char,"gid")) {
if (!value || !*value) {
return 0;
}
hsb->s_gid = simple_strtoul(value,&value,0);
if (*value) {
return 0;
}
} else if (!strcmp(this_char,"umask")) {
if (!value || !*value) {
return 0;
}
hsb->s_umask = simple_strtoul(value,&value,8);
if (*value) {
return 0;
}
} else if (!strcmp(this_char,"part")) {
if (!value || !*value) {
return 0;
}
*part = simple_strtoul(value,&value,0);
if (*value) {
return 0;
}
/* String-valued options */
} else if (!strcmp(this_char,"type") && value) {
if (strlen(value) != 4) {
return 0;
}
hsb->s_type = hfs_get_nl(value);
} else if (!strcmp(this_char,"creator") && value) {
if (strlen(value) != 4) {
return 0;
}
hsb->s_creator = hfs_get_nl(value);
/* Boolean-valued options */
} else if (!strcmp(this_char,"quiet")) {
if (value) {
return 0;
}
hsb->s_quiet = 1;
} else if (!strcmp(this_char,"afpd")) {
if (value) {
return 0;
}
hsb->s_afpd = 1;
/* Multiple choice options */
} else if (!strcmp(this_char,"names") && value) {
if ((*value && !value[1] && strchr("ntal78c",*value)) ||
!strcmp(value,"netatalk") ||
!strcmp(value,"trivial") ||
!strcmp(value,"alpha") ||
!strcmp(value,"latin") ||
!strcmp(value,"7bit") ||
!strcmp(value,"8bit") ||
!strcmp(value,"cap")) {
names = *value;
} else {
return 0;
}
} else if (!strcmp(this_char,"fork") && value) {
if ((*value && !value[1] && strchr("nsdc",*value)) ||
!strcmp(value,"netatalk") ||
!strcmp(value,"single") ||
!strcmp(value,"double") ||
!strcmp(value,"cap")) {
fork = *value;
} else {
return 0;
}
} else if (!strcmp(this_char,"case") && value) {
if ((*value && !value[1] && strchr("la",*value)) ||
!strcmp(value,"lower") ||
!strcmp(value,"asis")) {
hsb->s_lowercase = (*value == 'l');
} else {
return 0;
}
} else if (!strcmp(this_char,"conv") && value) {
if ((*value && !value[1] && strchr("bta",*value)) ||
!strcmp(value,"binary") ||
!strcmp(value,"text") ||
!strcmp(value,"auto")) {
hsb->s_conv = *value;
} else {
return 0;
}
} else {
return 0;
}
}
done:
/* Parse the "fork" and "names" options */
if (fork == '?') {
fork = hsb->s_afpd ? 'n' : 'c';
}
switch (fork) {
default:
case 'c':
hsb->s_ifill = hfs_cap_ifill;
hsb->s_reserved1 = hfs_cap_reserved1;
hsb->s_reserved2 = hfs_cap_reserved2;
break;
case 's':
hfs_warn("hfs_fs: AppleSingle not yet implemented.\n");
return 0;
/* break; */
case 'd':
hsb->s_ifill = hfs_dbl_ifill;
hsb->s_reserved1 = hfs_dbl_reserved1;
hsb->s_reserved2 = hfs_dbl_reserved2;
break;
case 'n':
hsb->s_ifill = hfs_nat_ifill;
hsb->s_reserved1 = hfs_nat_reserved1;
hsb->s_reserved2 = hfs_nat_reserved2;
break;
}
if (names == '?') {
names = fork;
}
switch (names) {
default:
case 'n':
hsb->s_nameout = hfs_colon2mac;
hsb->s_namein = hfs_mac2nat;
break;
case 'c':
hsb->s_nameout = hfs_colon2mac;
hsb->s_namein = hfs_mac2cap;
break;
case 't':
hsb->s_nameout = hfs_triv2mac;
hsb->s_namein = hfs_mac2triv;
break;
case '7':
hsb->s_nameout = hfs_prcnt2mac;
hsb->s_namein = hfs_mac2seven;
break;
case '8':
hsb->s_nameout = hfs_prcnt2mac;
hsb->s_namein = hfs_mac2eight;
break;
case 'l':
hsb->s_nameout = hfs_latin2mac;
hsb->s_namein = hfs_mac2latin;
break;
case 'a': /* 's' and 'd' are unadvertised aliases for 'alpha', */
case 's': /* since 'alpha' is the default if fork=s or fork=d. */
case 'd': /* (It is also helpful for poor typists!) */
hsb->s_nameout = hfs_prcnt2mac;
hsb->s_namein = hfs_mac2alpha;
break;
}
return 1;
}
/*
* parse_options()
*
* adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger
* This function is called by hfs_read_super() to parse the mount options.
*/
static int parse_options(char *options, struct hfs_sb_info *hsb, int *part)
{
char *p;
char names, fork;
substring_t args[MAX_OPT_ARGS];
int option;
/* initialize the sb with defaults */
memset(hsb, 0, sizeof(*hsb));
hsb->magic = HFS_SB_MAGIC;
hsb->s_uid = current->uid;
hsb->s_gid = current->gid;
hsb->s_umask = current->fs->umask;
hsb->s_type = 0x3f3f3f3f; /* == '????' */
hsb->s_creator = 0x3f3f3f3f; /* == '????' */
hsb->s_lowercase = 0;
hsb->s_quiet = 0;
hsb->s_afpd = 0;
/* default version. 0 just selects the defaults */
hsb->s_version = 0;
hsb->s_conv = 'b';
names = '?';
fork = '?';
*part = 0;
if (!options) {
goto done;
}
while ((p = strsep(&options,",")) != NULL) {
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
switch (token) {
/* Numeric-valued options */
case Opt_version:
if (match_int(&args[0], &option))
return 0;
hsb->s_version = option;
break;
case Opt_uid:
if (match_int(&args[0], &option))
return 0;
hsb->s_uid = option;
break;
case Opt_gid:
if (match_int(&args[0], &option))
return 0;
hsb->s_gid = option;
break;
case Opt_umask:
if (match_octal(&args[0], &option))
return 0;
hsb->s_umask = option;
break;
case Opt_part:
if (match_int(&args[0], &option))
return 0;
*part = option;
break;
/* String-valued options */
case Opt_type:
if (strlen(args[0].from) != 4) {
return 0;
}
hsb->s_type = hfs_get_nl(args[0].from);
break;
case Opt_creator:
if (strlen(args[0].from) != 4) {
return 0;
}
hsb->s_creator = hfs_get_nl(args[0].from);
break;
/* Boolean-valued options */
case Opt_quiet:
hsb->s_quiet = 1;
break;
case Opt_afpd:
hsb->s_afpd = 1;
break;
/* Multiple choice options */
case Opt_names_netatalk:
names = 'n';
break;
case Opt_names_trivial:
names = 't';
break;
case Opt_names_alpha:
names = 'a';
break;
case Opt_names_latin:
names = 'l';
break;
case Opt_names_7bit:
names = '7';
break;
case Opt_names_8bit:
names = '8';
break;
case Opt_names_cap:
names = 'c';
break;
case Opt_fork_netatalk:
fork = 'n';
break;
case Opt_fork_single:
fork = 's';
break;
case Opt_fork_double:
fork = 'd';
break;
case Opt_fork_cap:
fork = 'c';
break;
case Opt_case_lower:
hsb->s_lowercase = 1;
break;
case Opt_case_asis:
hsb->s_lowercase = 0;
break;
case Opt_conv_binary:
hsb->s_conv = 'b';
break;
case Opt_conv_text:
hsb->s_conv = 't';
break;
case Opt_conv_auto:
hsb->s_conv = 'a';
break;
default:
return 0;
}
}
done:
/* Parse the "fork" and "names" options */
if (fork == '?') {
fork = hsb->s_afpd ? 'n' : 'c';
}
switch (fork) {
default:
case 'c':
hsb->s_ifill = hfs_cap_ifill;
hsb->s_reserved1 = hfs_cap_reserved1;
hsb->s_reserved2 = hfs_cap_reserved2;
break;
case 's':
hfs_warn("hfs_fs: AppleSingle not yet implemented.\n");
return 0;
/* break; */
case 'd':
hsb->s_ifill = hfs_dbl_ifill;
hsb->s_reserved1 = hfs_dbl_reserved1;
hsb->s_reserved2 = hfs_dbl_reserved2;
break;
case 'n':
hsb->s_ifill = hfs_nat_ifill;
hsb->s_reserved1 = hfs_nat_reserved1;
hsb->s_reserved2 = hfs_nat_reserved2;
break;
}
if (names == '?') {
names = fork;
}
switch (names) {
default:
case 'n':
hsb->s_nameout = hfs_colon2mac;
hsb->s_namein = hfs_mac2nat;
break;
case 'c':
hsb->s_nameout = hfs_colon2mac;
hsb->s_namein = hfs_mac2cap;
break;
case 't':
hsb->s_nameout = hfs_triv2mac;
hsb->s_namein = hfs_mac2triv;
break;
case '7':
hsb->s_nameout = hfs_prcnt2mac;
hsb->s_namein = hfs_mac2seven;
break;
case '8':
hsb->s_nameout = hfs_prcnt2mac;
hsb->s_namein = hfs_mac2eight;
break;
case 'l':
hsb->s_nameout = hfs_latin2mac;
hsb->s_namein = hfs_mac2latin;
break;
case 'a': /* 's' and 'd' are unadvertised aliases for 'alpha', */
case 's': /* since 'alpha' is the default if fork=s or fork=d. */
case 'd': /* (It is also helpful for poor typists!) */
hsb->s_nameout = hfs_prcnt2mac;
hsb->s_namein = hfs_mac2alpha;
break;
}
return 1;
}
/*
* nat_readdir()
*
* This is the readdir() entry in the file_operations structure for
* HFS directories in the netatalk scheme. The purpose is to
* enumerate the entries in a directory, given the inode of the
* directory and a struct file which indicates the location in the
* directory. The struct file is updated so that the next call with
* the same dir and filp will produce the next directory entry. The
* entries are returned in dirent, which is "filled-in" by calling
* filldir(). This allows the same readdir() function be used for
* different dirent formats. We try to read in as many entries as we
* can before filldir() refuses to take any more.
*
* Note that the Netatalk format doesn't have the problem with
* metadata for covered directories that exists in the other formats,
* since the metadata is contained within the directory.
*/
static int nat_readdir(struct inode * dir, struct file * filp,
void * dirent, filldir_t filldir)
{
ino_t type;
int skip_dirs;
struct hfs_brec brec;
struct hfs_cat_entry *entry;
if (!dir || !dir->i_sb || !S_ISDIR(dir->i_mode)) {
return -EBADF;
}
entry = HFS_I(dir)->entry;
type = HFS_ITYPE(dir->i_ino);
skip_dirs = (type == HFS_NAT_HDIR);
if (filp->f_pos == 0) {
/* Entry 0 is for "." */
if (filldir(dirent, DOT->Name, DOT_LEN, 0, dir->i_ino)) {
return 0;
}
filp->f_pos = 1;
}
if (filp->f_pos == 1) {
/* Entry 1 is for ".." */
hfs_u32 cnid;
if (type == HFS_NAT_NDIR) {
cnid = hfs_get_nl(entry->key.ParID);
} else {
cnid = entry->cnid;
}
if (filldir(dirent, DOT_DOT->Name,
DOT_DOT_LEN, 1, ntohl(cnid))) {
return 0;
}
filp->f_pos = 2;
}
if (filp->f_pos < (dir->i_size - 1)) {
hfs_u32 cnid;
hfs_u8 type;
if (hfs_cat_open(entry, &brec) ||
hfs_cat_next(entry, &brec, filp->f_pos - 2, &cnid, &type)) {
return 0;
}
while (filp->f_pos < (dir->i_size - 1)) {
if (hfs_cat_next(entry, &brec, 1, &cnid, &type)) {
return 0;
}
if (!skip_dirs || (type != HFS_CDR_DIR)) {
ino_t ino;
unsigned int len;
unsigned char tmp_name[HFS_NAMEMAX];
ino = ntohl(cnid) | HFS_I(dir)->file_type;
len = hfs_namein(dir, tmp_name,
&((struct hfs_cat_key *)brec.key)->CName);
if (filldir(dirent, tmp_name, len,
filp->f_pos, ino)) {
hfs_cat_close(entry, &brec);
return 0;
}
}
++filp->f_pos;
}
hfs_cat_close(entry, &brec);
}
if (filp->f_pos == (dir->i_size - 1)) {
if (type == HFS_NAT_NDIR) {
/* In normal dirs entry 2 is for ".AppleDouble" */
if (filldir(dirent, DOT_APPLEDOUBLE->Name,
DOT_APPLEDOUBLE_LEN, filp->f_pos,
ntohl(entry->cnid) | HFS_NAT_HDIR)) {
return 0;
}
} else if (type == HFS_NAT_HDIR) {
/* In .AppleDouble entry 2 is for ".Parent" */
if (filldir(dirent, DOT_PARENT->Name,
DOT_PARENT_LEN, filp->f_pos,
ntohl(entry->cnid) | HFS_NAT_HDR)) {
return 0;
}
}
++filp->f_pos;
}
return 0;
}
/*
* find_ext()
*
* Given a pointer to a (struct hfs_file) and an allocation block
* number in the file, find the extent record containing that block.
* Returns a pointer to the extent record on success or NULL on failure.
* The 'cache' field of 'fil' also points to the extent so it has a
* reference count of at least 2.
*
* Callers must check that fil != NULL
*/
static struct hfs_extent * find_ext(struct hfs_fork *fork, int alloc_block)
{
struct hfs_cat_entry *entry = fork->entry;
struct hfs_btree *tr= entry->mdb->ext_tree;
struct hfs_ext_key target, *key;
struct hfs_brec brec;
struct hfs_extent *ext, *ptr;
int tmp;
if (alloc_block < 0) {
ext = &fork->first;
goto found;
}
ext = fork->cache;
if (!ext || (alloc_block < ext->start)) {
ext = &fork->first;
}
while (ext->next && (alloc_block > ext->end)) {
ext = ext->next;
}
if ((alloc_block <= ext->end) && (alloc_block >= ext->start)) {
goto found;
}
/* time to read more extents */
if (!HFS_NEW(ext)) {
goto bail3;
}
build_key(&target, fork, alloc_block);
tmp = hfs_bfind(&brec, tr, HFS_BKEY(&target), HFS_BFIND_READ_LE);
if (tmp < 0) {
goto bail2;
}
key = (struct hfs_ext_key *)brec.key;
if ((hfs_get_nl(key->FNum) != hfs_get_nl(target.FNum)) ||
(key->FkType != fork->fork)) {
goto bail1;
}
read_extent(ext, brec.data, hfs_get_hs(key->FABN));
hfs_brec_relse(&brec, NULL);
if ((alloc_block > ext->end) && (alloc_block < ext->start)) {
/* something strange happened */
goto bail2;
}
ptr = fork->cache;
if (!ptr || (alloc_block < ptr->start)) {
ptr = &fork->first;
}
while (ptr->next && (alloc_block > ptr->end)) {
ptr = ptr->next;
}
if (ext->start == ptr->start) {
/* somebody beat us to it. */
HFS_DELETE(ext);
ext = ptr;
} else if (ext->start < ptr->start) {
/* insert just before ptr */
ptr->prev->next = ext;
ext->prev = ptr->prev;
ext->next = ptr;
ptr->prev = ext;
} else {
/* insert at end */
ptr->next = ext;
ext->prev = ptr;
}
found:
++ext->count; /* for return value */
set_cache(fork, ext);
return ext;
bail1:
hfs_brec_relse(&brec, NULL);
bail2:
HFS_DELETE(ext);
bail3:
return NULL;
}