[PATCH 3/8] staging: exfat: Remove FAT/VFAT mount support, part 2

From: Valdis Kletnieks
Date: Wed Oct 23 2019 - 01:28:38 EST

Remove no longer referenced FAT/VFAT routines.

Signed-off-by: Valdis Kletnieks <Valdis.Kletnieks@xxxxxx>
---
drivers/staging/exfat/exfat.h | 49 +-
drivers/staging/exfat/exfat_core.c | 755 -----------------------------
2 files changed, 2 insertions(+), 802 deletions(-)

diff --git a/drivers/staging/exfat/exfat.h b/drivers/staging/exfat/exfat.h
index c2db3e9e9785..9cd78b6417d0 100644
--- a/drivers/staging/exfat/exfat.h
+++ b/drivers/staging/exfat/exfat.h
@@ -786,17 +786,12 @@ static void fs_error(struct super_block *sb);

/* cluster management functions */
static s32 clear_cluster(struct super_block *sb, u32 clu);
-static s32 fat_alloc_cluster(struct super_block *sb, s32 num_alloc,
- struct chain_t *p_chain);
static s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc,
struct chain_t *p_chain);
-static void fat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
- s32 do_relse);
static void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
s32 do_relse);
static u32 find_last_cluster(struct super_block *sb, struct chain_t *p_chain);
s32 count_num_clusters(struct super_block *sb, struct chain_t *dir);
-static s32 fat_count_used_clusters(struct super_block *sb);
static s32 exfat_count_used_clusters(struct super_block *sb);
void exfat_chain_cont_cluster(struct super_block *sb, u32 chain, s32 len);

@@ -813,63 +808,36 @@ s32 load_upcase_table(struct super_block *sb);
void free_upcase_table(struct super_block *sb);

/* dir entry management functions */
-static u32 fat_get_entry_type(struct dentry_t *p_entry);
static u32 exfat_get_entry_type(struct dentry_t *p_entry);
-static void fat_set_entry_type(struct dentry_t *p_entry, u32 type);
static void exfat_set_entry_type(struct dentry_t *p_entry, u32 type);
-static u32 fat_get_entry_attr(struct dentry_t *p_entry);
static u32 exfat_get_entry_attr(struct dentry_t *p_entry);
-static void fat_set_entry_attr(struct dentry_t *p_entry, u32 attr);
static void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr);
-static u8 fat_get_entry_flag(struct dentry_t *p_entry);
static u8 exfat_get_entry_flag(struct dentry_t *p_entry);
-static void fat_set_entry_flag(struct dentry_t *p_entry, u8 flag);
static void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flag);
-static u32 fat_get_entry_clu0(struct dentry_t *p_entry);
static u32 exfat_get_entry_clu0(struct dentry_t *p_entry);
-static void fat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu);
static void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu);
-static u64 fat_get_entry_size(struct dentry_t *p_entry);
static u64 exfat_get_entry_size(struct dentry_t *p_entry);
-static void fat_set_entry_size(struct dentry_t *p_entry, u64 size);
static void exfat_set_entry_size(struct dentry_t *p_entry, u64 size);
struct timestamp_t *tm_current(struct timestamp_t *tm);
-static void fat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
- u8 mode);
static void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
u8 mode);
-static void fat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
- u8 mode);
static void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
u8 mode);
-static s32 fat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry,
- u32 type, u32 start_clu, u64 size);
static s32 exfat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir,
s32 entry, u32 type, u32 start_clu, u64 size);
-static s32 fat_init_ext_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, s32 num_entries,
- struct uni_name_t *p_uniname,
- struct dos_name_t *p_dosname);
static s32 exfat_init_ext_dir_entry(struct super_block *sb, struct chain_t *p_dir,
s32 entry, s32 num_entries,
struct uni_name_t *p_uniname,
struct dos_name_t *p_dosname);
-static void init_dos_entry(struct dos_dentry_t *ep, u32 type, u32 start_clu);
-static void init_ext_entry(struct ext_dentry_t *ep, s32 order, u8 chksum,
- u16 *uniname);
static void init_file_entry(struct file_dentry_t *ep, u32 type);
static void init_strm_entry(struct strm_dentry_t *ep, u8 flags, u32 start_clu,
u64 size);
static void init_name_entry(struct name_dentry_t *ep, u16 *uniname);
-static void fat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, s32 order, s32 num_entries);
static void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
s32 entry, s32 order, s32 num_entries);

static s32 find_location(struct super_block *sb, struct chain_t *p_dir, s32 entry,
sector_t *sector, s32 *offset);
-static struct dentry_t *get_entry_with_sector(struct super_block *sb, sector_t sector,
- s32 offset);
struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir,
s32 entry, sector_t *sector);
struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
@@ -885,14 +853,9 @@ static s32 search_deleted_or_unused_entry(struct super_block *sb,
struct chain_t *p_dir, s32 num_entries);
static s32 find_empty_entry(struct inode *inode, struct chain_t *p_dir,
s32 num_entries);
-static s32 fat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, s32 num_entries,
- struct dos_name_t *p_dosname, u32 type);
static s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
struct uni_name_t *p_uniname, s32 num_entries,
struct dos_name_t *p_dosname, u32 type);
-static s32 fat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, struct dentry_t *p_entry);
static s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
s32 entry, struct dentry_t *p_entry);
s32 count_dos_name_entries(struct super_block *sb, struct chain_t *p_dir,
@@ -916,18 +879,14 @@ static void fat_get_uni_name_from_ext_entry(struct super_block *sb,
static void exfat_get_uni_name_from_ext_entry(struct super_block *sb,
struct chain_t *p_dir, s32 entry,
u16 *uniname);
-static s32 extract_uni_name_from_ext_entry(struct ext_dentry_t *ep,
- u16 *uniname, s32 order);
-static s32 extract_uni_name_from_name_entry(struct name_dentry_t *ep,
- u16 *uniname, s32 order);
+static s32 extract_uni_name_from_name_entry(struct name_dentry_t *ep, u16 *uniname,
+ s32 order);
static s32 fat_generate_dos_name(struct super_block *sb, struct chain_t *p_dir,
struct dos_name_t *p_dosname);
static void fat_attach_count_to_dos_name(u8 *dosname, s32 count);
static s32 fat_calc_num_entries(struct uni_name_t *p_uniname);
static s32 exfat_calc_num_entries(struct uni_name_t *p_uniname);
-static u8 calc_checksum_1byte(void *data, s32 len, u8 chksum);
u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type);
-static u32 calc_checksum_4byte(void *data, s32 len, u32 chksum, s32 type);

/* name resolution functions */
s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
@@ -952,10 +911,6 @@ int sector_read(struct super_block *sb, sector_t sec,
struct buffer_head **bh, bool read);
int sector_write(struct super_block *sb, sector_t sec,
struct buffer_head *bh, bool sync);
-static int multi_sector_read(struct super_block *sb, sector_t sec,
- struct buffer_head **bh, s32 num_secs, bool read);
-static int multi_sector_write(struct super_block *sb, sector_t sec,
- struct buffer_head *bh, s32 num_secs, bool sync);

void bdev_open(struct super_block *sb);
void bdev_close(struct super_block *sb);
diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
index fd481b21f8b6..dd69a9a6dddc 100644
--- a/drivers/staging/exfat/exfat_core.c
+++ b/drivers/staging/exfat/exfat_core.c
@@ -167,60 +167,6 @@ static s32 clear_cluster(struct super_block *sb, u32 clu)
return ret;
}

-static s32 fat_alloc_cluster(struct super_block *sb, s32 num_alloc,
- struct chain_t *p_chain)
-{
- int i, num_clusters = 0;
- u32 new_clu, last_clu = CLUSTER_32(~0), read_clu;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- new_clu = p_chain->dir;
- if (new_clu == CLUSTER_32(~0))
- new_clu = p_fs->clu_srch_ptr;
- else if (new_clu >= p_fs->num_clusters)
- new_clu = 2;
-
- __set_sb_dirty(sb);
-
- p_chain->dir = CLUSTER_32(~0);
-
- for (i = 2; i < p_fs->num_clusters; i++) {
- if (FAT_read(sb, new_clu, &read_clu) != 0)
- return -1;
-
- if (read_clu == CLUSTER_32(0)) {
- if (FAT_write(sb, new_clu, CLUSTER_32(~0)) < 0)
- return -1;
- num_clusters++;
-
- if (p_chain->dir == CLUSTER_32(~0)) {
- p_chain->dir = new_clu;
- } else {
- if (FAT_write(sb, last_clu, new_clu) < 0)
- return -1;
- }
-
- last_clu = new_clu;
-
- if ((--num_alloc) == 0) {
- p_fs->clu_srch_ptr = new_clu;
- if (p_fs->used_clusters != UINT_MAX)
- p_fs->used_clusters += num_clusters;
-
- return num_clusters;
- }
- }
- if ((++new_clu) >= p_fs->num_clusters)
- new_clu = 2;
- }
-
- p_fs->clu_srch_ptr = new_clu;
- if (p_fs->used_clusters != UINT_MAX)
- p_fs->used_clusters += num_clusters;
-
- return num_clusters;
-}
-
static s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc,
struct chain_t *p_chain)
{
@@ -300,47 +246,6 @@ static s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc,
return num_clusters;
}

-static void fat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
- s32 do_relse)
-{
- s32 num_clusters = 0;
- u32 clu, prev;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- int i;
- sector_t sector;
-
- if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0)))
- return;
- __set_sb_dirty(sb);
- clu = p_chain->dir;
-
- if (p_chain->size <= 0)
- return;
-
- do {
- if (p_fs->dev_ejected)
- break;
-
- if (do_relse) {
- sector = START_SECTOR(clu);
- for (i = 0; i < p_fs->sectors_per_clu; i++)
- buf_release(sb, sector + i);
- }
-
- prev = clu;
- if (FAT_read(sb, clu, &clu) == -1)
- break;
-
- if (FAT_write(sb, prev, CLUSTER_32(0)) < 0)
- break;
- num_clusters++;
-
- } while (clu != CLUSTER_32(~0));
-
- if (p_fs->used_clusters != UINT_MAX)
- p_fs->used_clusters -= num_clusters;
-}
-
static void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
s32 do_relse)
{
@@ -447,22 +352,6 @@ s32 count_num_clusters(struct super_block *sb, struct chain_t *p_chain)
return count;
}

-static s32 fat_count_used_clusters(struct super_block *sb)
-{
- int i, count = 0;
- u32 clu;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- for (i = 2; i < p_fs->num_clusters; i++) {
- if (FAT_read(sb, i, &clu) != 0)
- break;
- if (clu != CLUSTER_32(0))
- count++;
- }
-
- return count;
-}
-
static s32 exfat_count_used_clusters(struct super_block *sb)
{
int i, map_i, map_b, count = 0;
@@ -906,28 +795,6 @@ void free_upcase_table(struct super_block *sb)
* Directory Entry Management Functions
*/

-static u32 fat_get_entry_type(struct dentry_t *p_entry)
-{
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- if (*(ep->name) == 0x0)
- return TYPE_UNUSED;
-
- else if (*(ep->name) == 0xE5)
- return TYPE_DELETED;
-
- else if (ep->attr == ATTR_EXTEND)
- return TYPE_EXTEND;
-
- else if ((ep->attr & (ATTR_SUBDIR | ATTR_VOLUME)) == ATTR_VOLUME)
- return TYPE_VOLUME;
-
- else if ((ep->attr & (ATTR_SUBDIR | ATTR_VOLUME)) == ATTR_SUBDIR)
- return TYPE_DIR;
-
- return TYPE_FILE;
-}
-
static u32 exfat_get_entry_type(struct dentry_t *p_entry)
{
struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
@@ -973,29 +840,6 @@ static u32 exfat_get_entry_type(struct dentry_t *p_entry)
return TYPE_BENIGN_SEC;
}

-static void fat_set_entry_type(struct dentry_t *p_entry, u32 type)
-{
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- if (type == TYPE_UNUSED)
- *(ep->name) = 0x0;
-
- else if (type == TYPE_DELETED)
- *(ep->name) = 0xE5;
-
- else if (type == TYPE_EXTEND)
- ep->attr = ATTR_EXTEND;
-
- else if (type == TYPE_DIR)
- ep->attr = ATTR_SUBDIR;
-
- else if (type == TYPE_FILE)
- ep->attr = ATTR_ARCHIVE;
-
- else if (type == TYPE_SYMLINK)
- ep->attr = ATTR_ARCHIVE | ATTR_SYMLINK;
-}
-
static void exfat_set_entry_type(struct dentry_t *p_entry, u32 type)
{
struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
@@ -1026,13 +870,6 @@ static void exfat_set_entry_type(struct dentry_t *p_entry, u32 type)
}
}

-static u32 fat_get_entry_attr(struct dentry_t *p_entry)
-{
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- return (u32)ep->attr;
-}
-
static u32 exfat_get_entry_attr(struct dentry_t *p_entry)
{
struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
@@ -1040,13 +877,6 @@ static u32 exfat_get_entry_attr(struct dentry_t *p_entry)
return (u32)GET16_A(ep->attr);
}

-static void fat_set_entry_attr(struct dentry_t *p_entry, u32 attr)
-{
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- ep->attr = (u8)attr;
-}
-
static void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr)
{
struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
@@ -1054,11 +884,6 @@ static void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr)
SET16_A(ep->attr, (u16)attr);
}

-static u8 fat_get_entry_flag(struct dentry_t *p_entry)
-{
- return 0x01;
-}
-
static u8 exfat_get_entry_flag(struct dentry_t *p_entry)
{
struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
@@ -1066,10 +891,6 @@ static u8 exfat_get_entry_flag(struct dentry_t *p_entry)
return ep->flags;
}

-static void fat_set_entry_flag(struct dentry_t *p_entry, u8 flags)
-{
-}
-
static void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flags)
{
struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
@@ -1077,14 +898,6 @@ static void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flags)
ep->flags = flags;
}

-static u32 fat_get_entry_clu0(struct dentry_t *p_entry)
-{
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- return ((u32)GET16_A(ep->start_clu_hi) << 16) |
- GET16_A(ep->start_clu_lo);
-}
-
static u32 exfat_get_entry_clu0(struct dentry_t *p_entry)
{
struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
@@ -1092,14 +905,6 @@ static u32 exfat_get_entry_clu0(struct dentry_t *p_entry)
return GET32_A(ep->start_clu);
}

-static void fat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu)
-{
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- SET16_A(ep->start_clu_lo, CLUSTER_16(start_clu));
- SET16_A(ep->start_clu_hi, CLUSTER_16(start_clu >> 16));
-}
-
static void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu)
{
struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
@@ -1107,13 +912,6 @@ static void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu)
SET32_A(ep->start_clu, start_clu);
}

-static u64 fat_get_entry_size(struct dentry_t *p_entry)
-{
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- return (u64)GET32_A(ep->size);
-}
-
static u64 exfat_get_entry_size(struct dentry_t *p_entry)
{
struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
@@ -1121,13 +919,6 @@ static u64 exfat_get_entry_size(struct dentry_t *p_entry)
return GET64_A(ep->valid_size);
}

-static void fat_set_entry_size(struct dentry_t *p_entry, u64 size)
-{
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- SET32_A(ep->size, (u32)size);
-}
-
static void exfat_set_entry_size(struct dentry_t *p_entry, u64 size)
{
struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
@@ -1136,31 +927,6 @@ static void exfat_set_entry_size(struct dentry_t *p_entry, u64 size)
SET64_A(ep->size, size);
}

-static void fat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
- u8 mode)
-{
- u16 t = 0x00, d = 0x21;
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- switch (mode) {
- case TM_CREATE:
- t = GET16_A(ep->create_time);
- d = GET16_A(ep->create_date);
- break;
- case TM_MODIFY:
- t = GET16_A(ep->modify_time);
- d = GET16_A(ep->modify_date);
- break;
- }
-
- tp->sec = (t & 0x001F) << 1;
- tp->min = (t >> 5) & 0x003F;
- tp->hour = (t >> 11);
- tp->day = (d & 0x001F);
- tp->mon = (d >> 5) & 0x000F;
- tp->year = (d >> 9);
-}
-
static void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
u8 mode)
{
@@ -1190,27 +956,6 @@ static void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *t
tp->year = (d >> 9);
}

-static void fat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
- u8 mode)
-{
- u16 t, d;
- struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
-
- t = (tp->hour << 11) | (tp->min << 5) | (tp->sec >> 1);
- d = (tp->year << 9) | (tp->mon << 5) | tp->day;
-
- switch (mode) {
- case TM_CREATE:
- SET16_A(ep->create_time, t);
- SET16_A(ep->create_date, d);
- break;
- case TM_MODIFY:
- SET16_A(ep->modify_time, t);
- SET16_A(ep->modify_date, d);
- break;
- }
-}
-
static void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
u8 mode)
{
@@ -1236,23 +981,6 @@ static void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *t
}
}

-static s32 fat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry,
- u32 type, u32 start_clu, u64 size)
-{
- sector_t sector;
- struct dos_dentry_t *dos_ep;
-
- dos_ep = (struct dos_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
- &sector);
- if (!dos_ep)
- return FFS_MEDIAERR;
-
- init_dos_entry(dos_ep, type, start_clu);
- buf_modify(sb, sector);
-
- return FFS_SUCCESS;
-}
-
static s32 exfat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir,
s32 entry, u32 type, u32 start_clu, u64 size)
{
@@ -1283,57 +1011,6 @@ static s32 exfat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir,
return FFS_SUCCESS;
}

-static s32 fat_init_ext_entry(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, s32 num_entries,
- struct uni_name_t *p_uniname,
- struct dos_name_t *p_dosname)
-{
- int i;
- sector_t sector;
- u8 chksum;
- u16 *uniname = p_uniname->name;
- struct dos_dentry_t *dos_ep;
- struct ext_dentry_t *ext_ep;
-
- dos_ep = (struct dos_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
- &sector);
- if (!dos_ep)
- return FFS_MEDIAERR;
-
- dos_ep->lcase = p_dosname->name_case;
- memcpy(dos_ep->name, p_dosname->name, DOS_NAME_LENGTH);
- buf_modify(sb, sector);
-
- if ((--num_entries) > 0) {
- chksum = calc_checksum_1byte((void *)dos_ep->name,
- DOS_NAME_LENGTH, 0);
-
- for (i = 1; i < num_entries; i++) {
- ext_ep = (struct ext_dentry_t *)get_entry_in_dir(sb,
- p_dir,
- entry - i,
- &sector);
- if (!ext_ep)
- return FFS_MEDIAERR;
-
- init_ext_entry(ext_ep, i, chksum, uniname);
- buf_modify(sb, sector);
- uniname += 13;
- }
-
- ext_ep = (struct ext_dentry_t *)get_entry_in_dir(sb, p_dir,
- entry - i,
- &sector);
- if (!ext_ep)
- return FFS_MEDIAERR;
-
- init_ext_entry(ext_ep, i + 0x40, chksum, uniname);
- buf_modify(sb, sector);
- }
-
- return FFS_SUCCESS;
-}
-
static s32 exfat_init_ext_entry(struct super_block *sb, struct chain_t *p_dir,
s32 entry, s32 num_entries,
struct uni_name_t *p_uniname,
@@ -1380,70 +1057,6 @@ static s32 exfat_init_ext_entry(struct super_block *sb, struct chain_t *p_dir,
return FFS_SUCCESS;
}

-static void init_dos_entry(struct dos_dentry_t *ep, u32 type, u32 start_clu)
-{
- struct timestamp_t tm, *tp;
-
- fat_set_entry_type((struct dentry_t *)ep, type);
- SET16_A(ep->start_clu_lo, CLUSTER_16(start_clu));
- SET16_A(ep->start_clu_hi, CLUSTER_16(start_clu >> 16));
- SET32_A(ep->size, 0);
-
- tp = tm_current(&tm);
- fat_set_entry_time((struct dentry_t *)ep, tp, TM_CREATE);
- fat_set_entry_time((struct dentry_t *)ep, tp, TM_MODIFY);
- SET16_A(ep->access_date, 0);
- ep->create_time_ms = 0;
-}
-
-static void init_ext_entry(struct ext_dentry_t *ep, s32 order, u8 chksum, u16 *uniname)
-{
- int i;
- bool end = false;
-
- fat_set_entry_type((struct dentry_t *)ep, TYPE_EXTEND);
- ep->order = (u8)order;
- ep->sysid = 0;
- ep->checksum = chksum;
- SET16_A(ep->start_clu, 0);
-
- for (i = 0; i < 10; i += 2) {
- if (!end) {
- SET16(ep->unicode_0_4 + i, *uniname);
- if (*uniname == 0x0)
- end = true;
- else
- uniname++;
- } else {
- SET16(ep->unicode_0_4 + i, 0xFFFF);
- }
- }
-
- for (i = 0; i < 12; i += 2) {
- if (!end) {
- SET16_A(ep->unicode_5_10 + i, *uniname);
- if (*uniname == 0x0)
- end = true;
- else
- uniname++;
- } else {
- SET16_A(ep->unicode_5_10 + i, 0xFFFF);
- }
- }
-
- for (i = 0; i < 4; i += 2) {
- if (!end) {
- SET16_A(ep->unicode_11_12 + i, *uniname);
- if (*uniname == 0x0)
- end = true;
- else
- uniname++;
- } else {
- SET16_A(ep->unicode_11_12 + i, 0xFFFF);
- }
- }
-}
-
static void init_file_entry(struct file_dentry_t *ep, u32 type)
{
struct timestamp_t tm, *tp;
@@ -1483,24 +1096,6 @@ static void init_name_entry(struct name_dentry_t *ep, u16 *uniname)
}
}

-static void fat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, s32 order, s32 num_entries)
-{
- int i;
- sector_t sector;
- struct dentry_t *ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- for (i = num_entries - 1; i >= order; i--) {
- ep = get_entry_in_dir(sb, p_dir, entry - i, &sector);
- if (!ep)
- return;
-
- p_fs->fs_func->set_entry_type(ep, TYPE_DELETED);
- buf_modify(sb, sector);
- }
-}
-
static void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
s32 entry, s32 order, s32 num_entries)
{
@@ -1633,19 +1228,6 @@ static s32 find_location(struct super_block *sb, struct chain_t *p_dir, s32 entr
return FFS_SUCCESS;
}

-static struct dentry_t *get_entry_with_sector(struct super_block *sb, sector_t sector,
- s32 offset)
-{
- u8 *buf;
-
- buf = buf_getblk(sb, sector);
-
- if (!buf)
- return NULL;
-
- return (struct dentry_t *)(buf + offset);
-}
-
struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir,
s32 entry, sector_t *sector)
{
@@ -1917,45 +1499,6 @@ static s32 write_whole_entry_set(struct super_block *sb, struct entry_set_cache_
es->num_entries);
}

-/* write back some entries in entry set */
-static s32 write_partial_entries_in_entry_set(struct super_block *sb,
- struct entry_set_cache_t *es, struct dentry_t *ep, u32 count)
-{
- s32 ret, byte_offset, off;
- u32 clu = 0;
- sector_t sec;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
- struct chain_t dir;
-
- /* vaidity check */
- if (ep + count > ((struct dentry_t *)&(es->__buf)) + es->num_entries)
- return FFS_ERROR;
-
- dir.dir = GET_CLUSTER_FROM_SECTOR(es->sector);
- dir.flags = es->alloc_flag;
- dir.size = 0xffffffff; /* XXX */
-
- byte_offset = (es->sector - START_SECTOR(dir.dir)) <<
- p_bd->sector_size_bits;
- byte_offset += ((void **)ep - &(es->__buf)) + es->offset;
-
- ret = _walk_fat_chain(sb, &dir, byte_offset, &clu);
- if (ret != FFS_SUCCESS)
- return ret;
-
- /* byte offset in cluster */
- byte_offset &= p_fs->cluster_size - 1;
-
- /* byte offset in sector */
- off = byte_offset & p_bd->sector_size_mask;
-
- /* sector offset in cluster */
- sec = byte_offset >> p_bd->sector_size_bits;
- sec += START_SECTOR(clu);
- return __write_partial_entries_in_entry_set(sb, es, sec, off, count);
-}
-
/* search EMPTY CONTINUOUS "num_entries" entries */
static s32 search_deleted_or_unused_entry(struct super_block *sb,
struct chain_t *p_dir, s32 num_entries)
@@ -2137,104 +1680,6 @@ static s32 find_empty_entry(struct inode *inode, struct chain_t *p_dir, s32 num_
return dentry;
}

-/* return values of fat_find_dir_entry()
- * >= 0 : return dir entiry position with the name in dir
- * -1 : (root dir, ".") it is the root dir itself
- * -2 : entry with the name does not exist
- */
-static s32 fat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, s32 num_entries,
- struct dos_name_t *p_dosname, u32 type)
-{
- int i, dentry = 0, len;
- s32 order = 0;
- bool is_feasible_entry = true, has_ext_entry = false;
- s32 dentries_per_clu;
- u32 entry_type;
- u16 entry_uniname[14], *uniname = NULL, unichar;
- struct chain_t clu;
- struct dentry_t *ep;
- struct dos_dentry_t *dos_ep;
- struct ext_dentry_t *ext_ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (p_dir->dir == p_fs->root_dir) {
- if ((!nls_uniname_cmp(sb, p_uniname->name,
- (u16 *)UNI_CUR_DIR_NAME)) ||
- (!nls_uniname_cmp(sb, p_uniname->name,
- (u16 *)UNI_PAR_DIR_NAME)))
- return -1; // special case, root directory itself
- }
-
- if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
- dentries_per_clu = p_fs->dentries_in_root;
- else
- dentries_per_clu = p_fs->dentries_per_clu;
-
- clu.dir = p_dir->dir;
- clu.flags = p_dir->flags;
-
- while (clu.dir != CLUSTER_32(~0)) {
- if (p_fs->dev_ejected)
- break;
-
- for (i = 0; i < dentries_per_clu; i++, dentry++) {
- ep = get_entry_in_dir(sb, &clu, i, NULL);
- if (!ep)
- return -2;
-
- entry_type = p_fs->fs_func->get_entry_type(ep);
-
- if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) {
- if ((type == TYPE_ALL) || (type == entry_type)) {
- if (is_feasible_entry && has_ext_entry)
- return dentry;
-
- dos_ep = (struct dos_dentry_t *)ep;
- if (!nls_dosname_cmp(sb, p_dosname->name, dos_ep->name))
- return dentry;
- }
- is_feasible_entry = true;
- has_ext_entry = false;
- } else if (entry_type == TYPE_EXTEND) {
- if (is_feasible_entry) {
- ext_ep = (struct ext_dentry_t *)ep;
- if (ext_ep->order > 0x40) {
- order = (s32)(ext_ep->order - 0x40);
- uniname = p_uniname->name + 13 * (order - 1);
- } else {
- order = (s32)ext_ep->order;
- uniname -= 13;
- }
-
- len = extract_uni_name_from_ext_entry(ext_ep, entry_uniname, order);
-
- unichar = *(uniname + len);
- *(uniname + len) = 0x0;
-
- if (nls_uniname_cmp(sb, uniname, entry_uniname))
- is_feasible_entry = false;
-
- *(uniname + len) = unichar;
- }
- has_ext_entry = true;
- } else if (entry_type == TYPE_UNUSED) {
- return -2;
- }
- is_feasible_entry = true;
- has_ext_entry = false;
- }
-
- if (p_dir->dir == CLUSTER_32(0))
- break; /* FAT16 root_dir */
-
- if (FAT_read(sb, clu.dir, &clu.dir) != 0)
- return -2;
- }
-
- return -2;
-}
-
/* return values of exfat_find_dir_entry()
* >= 0 : return dir entiry position with the name in dir
* -1 : (root dir, ".") it is the root dir itself
@@ -2383,36 +1828,6 @@ static s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
return -2;
}

-static s32 fat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, struct dentry_t *p_entry)
-{
- s32 count = 0;
- u8 chksum;
- struct dos_dentry_t *dos_ep = (struct dos_dentry_t *)p_entry;
- struct ext_dentry_t *ext_ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- chksum = calc_checksum_1byte((void *)dos_ep->name, DOS_NAME_LENGTH, 0);
-
- for (entry--; entry >= 0; entry--) {
- ext_ep = (struct ext_dentry_t *)get_entry_in_dir(sb, p_dir,
- entry, NULL);
- if (!ext_ep)
- return -1;
-
- if ((p_fs->fs_func->get_entry_type((struct dentry_t *)ext_ep) ==
- TYPE_EXTEND) && (ext_ep->checksum == chksum)) {
- count++;
- if (ext_ep->order > 0x40)
- return count;
- } else {
- return count;
- }
- }
-
- return count;
-}
-
static s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
s32 entry, struct dentry_t *p_entry)
{
@@ -2614,33 +2029,6 @@ void get_uni_name_from_dos_entry(struct super_block *sb,
nls_dosname_to_uniname(sb, p_uniname, &dos_name);
}

-static void fat_get_uni_name_from_ext_entry(struct super_block *sb,
- struct chain_t *p_dir, s32 entry,
- u16 *uniname)
-{
- int i;
- struct ext_dentry_t *ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- for (entry--, i = 1; entry >= 0; entry--, i++) {
- ep = (struct ext_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
- NULL);
- if (!ep)
- return;
-
- if (p_fs->fs_func->get_entry_type((struct dentry_t *)ep) ==
- TYPE_EXTEND) {
- extract_uni_name_from_ext_entry(ep, uniname, i);
- if (ep->order > 0x40)
- return;
- } else {
- return;
- }
-
- uniname += 13;
- }
-}
-
static void exfat_get_uni_name_from_ext_entry(struct super_block *sb,
struct chain_t *p_dir, s32 entry,
u16 *uniname)
@@ -2678,51 +2066,6 @@ static void exfat_get_uni_name_from_ext_entry(struct super_block *sb,
release_entry_set(es);
}

-static s32 extract_uni_name_from_ext_entry(struct ext_dentry_t *ep, u16 *uniname,
- s32 order)
-{
- int i, len = 0;
-
- for (i = 0; i < 10; i += 2) {
- *uniname = GET16(ep->unicode_0_4 + i);
- if (*uniname == 0x0)
- return len;
- uniname++;
- len++;
- }
-
- if (order < 20) {
- for (i = 0; i < 12; i += 2) {
- *uniname = GET16_A(ep->unicode_5_10 + i);
- if (*uniname == 0x0)
- return len;
- uniname++;
- len++;
- }
- } else {
- for (i = 0; i < 8; i += 2) {
- *uniname = GET16_A(ep->unicode_5_10 + i);
- if (*uniname == 0x0)
- return len;
- uniname++;
- len++;
- }
- *uniname = 0x0; /* uniname[MAX_NAME_LENGTH-1] */
- return len;
- }
-
- for (i = 0; i < 4; i += 2) {
- *uniname = GET16_A(ep->unicode_11_12 + i);
- if (*uniname == 0x0)
- return len;
- uniname++;
- len++;
- }
-
- *uniname = 0x0;
- return len;
-}
-
static s32 extract_uni_name_from_name_entry(struct name_dentry_t *ep, u16 *uniname,
s32 order)
{
@@ -2862,18 +2205,6 @@ static void fat_attach_count_to_dos_name(u8 *dosname, s32 count)
dosname[7] = ' ';
}

-static s32 fat_calc_num_entries(struct uni_name_t *p_uniname)
-{
- s32 len;
-
- len = p_uniname->name_len;
- if (len == 0)
- return 0;
-
- /* 1 dos name entry + extended entries */
- return (len - 1) / 13 + 2;
-}
-
static s32 exfat_calc_num_entries(struct uni_name_t *p_uniname)
{
s32 len;
@@ -2886,17 +2217,6 @@ static s32 exfat_calc_num_entries(struct uni_name_t *p_uniname)
return (len - 1) / 15 + 3;
}

-static u8 calc_checksum_1byte(void *data, s32 len, u8 chksum)
-{
- int i;
- u8 *c = (u8 *)data;
-
- for (i = 0; i < len; i++, c++)
- chksum = (((chksum & 1) << 7) | ((chksum & 0xFE) >> 1)) + *c;
-
- return chksum;
-}
-
u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type)
{
int i;
@@ -2921,30 +2241,6 @@ u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type)
return chksum;
}

-static u32 calc_checksum_4byte(void *data, s32 len, u32 chksum, s32 type)
-{
- int i;
- u8 *c = (u8 *)data;
-
- switch (type) {
- case CS_PBR_SECTOR:
- for (i = 0; i < len; i++, c++) {
- if ((i == 106) || (i == 107) || (i == 112))
- continue;
- chksum = (((chksum & 1) << 31) |
- ((chksum & 0xFFFFFFFE) >> 1)) + (u32)*c;
- }
- break;
- default
- :
- for (i = 0; i < len; i++, c++)
- chksum = (((chksum & 1) << 31) |
- ((chksum & 0xFFFFFFFE) >> 1)) + (u32)*c;
- }
-
- return chksum;
-}
-
/*
* Name Resolution Functions
*/
@@ -3506,54 +2802,3 @@ int sector_write(struct super_block *sb, sector_t sec, struct buffer_head *bh,

return ret;
}
-
-static int multi_sector_read(struct super_block *sb, sector_t sec,
- struct buffer_head **bh, s32 num_secs, bool read)
-{
- s32 ret = FFS_MEDIAERR;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (((sec + num_secs) > (p_fs->PBR_sector + p_fs->num_sectors)) &&
- (p_fs->num_sectors > 0)) {
- pr_err("[EXFAT] %s: out of range error! (sec = %llu, num_secs = %d)\n",
- __func__, (unsigned long long)sec, num_secs);
- fs_error(sb);
- return ret;
- }
-
- if (!p_fs->dev_ejected) {
- ret = bdev_read(sb, sec, bh, num_secs, read);
- if (ret != FFS_SUCCESS)
- p_fs->dev_ejected = 1;
- }
-
- return ret;
-}
-
-static int multi_sector_write(struct super_block *sb, sector_t sec,
- struct buffer_head *bh, s32 num_secs, bool sync)
-{
- s32 ret = FFS_MEDIAERR;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if ((sec + num_secs) > (p_fs->PBR_sector + p_fs->num_sectors) &&
- (p_fs->num_sectors > 0)) {
- pr_err("[EXFAT] %s: out of range error! (sec = %llu, num_secs = %d)\n",
- __func__, (unsigned long long)sec, num_secs);
- fs_error(sb);
- return ret;
- }
- if (!bh) {
- pr_err("[EXFAT] %s: bh is NULL!\n", __func__);
- fs_error(sb);
- return ret;
- }
-
- if (!p_fs->dev_ejected) {
- ret = bdev_write(sb, sec, bh, num_secs, sync);
- if (ret != FFS_SUCCESS)
- p_fs->dev_ejected = 1;
- }
-
- return ret;
-}
--
2.23.0