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fs/adfs: add time stamp and file type helpers

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Add some helpers to check whether the inode has a time stamp and file
type, and to parse the file type from the load address.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Russell King 2019-06-04 14:50:24 +01:00 committed by Al Viro
parent 8616108de1
commit b4ed8f75c8
4 changed files with 27 additions and 27 deletions
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29
fs/adfs/adfs.h
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@ -9,6 +9,15 @@
#define ADFS_BAD_FRAG 1
#define ADFS_ROOT_FRAG 2
#define ADFS_FILETYPE_NONE ((u16)~0)
/* RISC OS 12-bit filetype is stored in load_address[19:8] */
static inline u16 adfs_filetype(u32 loadaddr)
{
return (loadaddr & 0xfff00000) == 0xfff00000 ?
(loadaddr >> 8) & 0xfff : ADFS_FILETYPE_NONE;
}
#define ADFS_NDA_OWNER_READ (1 << 0)
#define ADFS_NDA_OWNER_WRITE (1 << 1)
#define ADFS_NDA_LOCKED (1 << 2)
@ -27,12 +36,20 @@ struct adfs_inode_info {
__u32 parent_id; /* parent indirect disc address */
__u32 loadaddr; /* RISC OS load address */
__u32 execaddr; /* RISC OS exec address */
unsigned int filetype; /* RISC OS file type */
unsigned int attr; /* RISC OS permissions */
unsigned int stamped:1; /* RISC OS file has date/time */
struct inode vfs_inode;
};
static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
{
return container_of(inode, struct adfs_inode_info, vfs_inode);
}
static inline bool adfs_inode_is_stamped(struct inode *inode)
{
return (ADFS_I(inode)->loadaddr & 0xfff00000) == 0xfff00000;
}
/*
* Forward-declare this
*/
@ -68,11 +85,6 @@ static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)
return sb->s_fs_info;
}
static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
{
return container_of(inode, struct adfs_inode_info, vfs_inode);
}
/*
* Directory handling
*/
@ -105,9 +117,6 @@ struct object_info {
__u8 attr; /* RISC OS attributes */
unsigned int name_len; /* name length */
char name[ADFS_MAX_NAME_LEN];/* file name */
/* RISC OS file type (12-bit: derived from loadaddr) */
__u16 filetype;
};
struct adfs_dir_ops {

16
fs/adfs/dir.c
View File

@ -38,20 +38,14 @@ void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj)
if (obj->name_len <= 2 && dots == obj->name_len)
obj->name[0] = '^';
obj->filetype = -1;
/*
* object is a file and is filetyped and timestamped?
* RISC OS 12-bit filetype is stored in load_address[19:8]
* If the object is a file, and the user requested the ,xyz hex
* filetype suffix to the name, check the filetype and append.
*/
if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
(0xfff00000 == (0xfff00000 & obj->loadaddr))) {
obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
/* optionally append the ,xyz hex filetype suffix */
if (ADFS_SB(dir->sb)->s_ftsuffix) {
__u16 filetype = obj->filetype;
if (!(obj->attr & ADFS_NDA_DIRECTORY) && ADFS_SB(dir->sb)->s_ftsuffix) {
u16 filetype = adfs_filetype(obj->loadaddr);
if (filetype != ADFS_FILETYPE_NONE) {
obj->name[obj->name_len++] = ',';
obj->name[obj->name_len++] = hex_asc_lo(filetype >> 8);
obj->name[obj->name_len++] = hex_asc_lo(filetype >> 4);

8
fs/adfs/inode.c
View File

@ -97,7 +97,7 @@ adfs_atts2mode(struct super_block *sb, struct inode *inode)
return S_IFDIR | S_IXUGO | mode;
}
switch (ADFS_I(inode)->filetype) {
switch (adfs_filetype(ADFS_I(inode)->loadaddr)) {
case 0xfc0: /* LinkFS */
return S_IFLNK|S_IRWXUGO;
@ -177,7 +177,7 @@ adfs_adfs2unix_time(struct timespec64 *tv, struct inode *inode)
2208988800000000000LL;
s64 nsec;
if (ADFS_I(inode)->stamped == 0)
if (!adfs_inode_is_stamped(inode))
goto cur_time;
high = ADFS_I(inode)->loadaddr & 0xFF; /* top 8 bits of timestamp */
@ -216,7 +216,7 @@ adfs_unix2adfs_time(struct inode *inode, unsigned int secs)
{
unsigned int high, low;
if (ADFS_I(inode)->stamped) {
if (adfs_inode_is_stamped(inode)) {
/* convert 32-bit seconds to 40-bit centi-seconds */
low = (secs & 255) * 100;
high = (secs / 256) * 100 + (low >> 8) + 0x336e996a;
@ -266,8 +266,6 @@ adfs_iget(struct super_block *sb, struct object_info *obj)
ADFS_I(inode)->loadaddr = obj->loadaddr;
ADFS_I(inode)->execaddr = obj->execaddr;
ADFS_I(inode)->attr = obj->attr;
ADFS_I(inode)->filetype = obj->filetype;
ADFS_I(inode)->stamped = ((obj->loadaddr & 0xfff00000) == 0xfff00000);
inode->i_mode = adfs_atts2mode(sb, inode);
adfs_adfs2unix_time(&inode->i_mtime, inode);

1
fs/adfs/super.c
View File

@ -490,7 +490,6 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
root_obj.size = ADFS_NEWDIR_SIZE;
root_obj.attr = ADFS_NDA_DIRECTORY | ADFS_NDA_OWNER_READ |
ADFS_NDA_OWNER_WRITE | ADFS_NDA_PUBLIC_READ;
root_obj.filetype = -1;
/*
* If this is a F+ disk with variable length directories,