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openwrt-owl/target/linux/adm5120/patches-3.14/050-revert_rootfs_splits.patch

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Index: linux-3.14.27/drivers/mtd/mtdpart.c
===================================================================
--- linux-3.14.27.orig/drivers/mtd/mtdpart.c
+++ linux-3.14.27/drivers/mtd/mtdpart.c
@@ -29,11 +29,9 @@
#include <linux/kmod.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
-#include <linux/magic.h>
#include <linux/err.h>
#include "mtdcore.h"
-#include "mtdsplit/mtdsplit.h"
#define MTD_ERASE_PARTIAL 0x8000 /* partition only covers parts of an erase block */
@@ -49,14 +47,13 @@ struct mtd_part {
struct list_head list;
};
-static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part);
-
/*
* Given a pointer to the MTD object in the mtd_part structure, we can retrieve
* the pointer to that structure with this macro.
*/
#define PART(x) ((struct mtd_part *)(x))
+
/*
* MTD methods which simply translate the effective address and pass through
* to the _real_ device.
@@ -509,12 +506,14 @@ static struct mtd_part *allocate_partiti
if (slave->offset == MTDPART_OFS_APPEND)
slave->offset = cur_offset;
if (slave->offset == MTDPART_OFS_NXTBLK) {
- /* Round up to next erasesize */
- slave->offset = mtd_roundup_to_eb(cur_offset, master);
- if (slave->offset != cur_offset)
+ slave->offset = cur_offset;
+ if (mtd_mod_by_eb(cur_offset, master) != 0) {
+ /* Round up to next erasesize */
+ slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
printk(KERN_NOTICE "Moving partition %d: "
"0x%012llx -> 0x%012llx\n", partno,
(unsigned long long)cur_offset, (unsigned long long)slave->offset);
+ }
}
if (slave->offset == MTDPART_OFS_RETAIN) {
slave->offset = cur_offset;
@@ -616,10 +615,8 @@ out_register:
return slave;
}
-
-static int
-__mtd_add_partition(struct mtd_info *master, const char *name,
- long long offset, long long length, bool dup_check)
+int mtd_add_partition(struct mtd_info *master, const char *name,
+ long long offset, long long length)
{
struct mtd_partition part;
struct mtd_part *p, *new;
@@ -651,24 +648,21 @@ __mtd_add_partition(struct mtd_info *mas
end = offset + length;
mutex_lock(&mtd_partitions_mutex);
- if (dup_check) {
- list_for_each_entry(p, &mtd_partitions, list)
- if (p->master == master) {
- if ((start >= p->offset) &&
- (start < (p->offset + p->mtd.size)))
- goto err_inv;
-
- if ((end >= p->offset) &&
- (end < (p->offset + p->mtd.size)))
- goto err_inv;
- }
- }
+ list_for_each_entry(p, &mtd_partitions, list)
+ if (p->master == master) {
+ if ((start >= p->offset) &&
+ (start < (p->offset + p->mtd.size)))
+ goto err_inv;
+
+ if ((end >= p->offset) &&
+ (end < (p->offset + p->mtd.size)))
+ goto err_inv;
+ }
list_add(&new->list, &mtd_partitions);
mutex_unlock(&mtd_partitions_mutex);
add_mtd_device(&new->mtd);
- mtd_partition_split(master, new);
return ret;
err_inv:
@@ -678,12 +672,6 @@ err_inv:
}
EXPORT_SYMBOL_GPL(mtd_add_partition);
-int mtd_add_partition(struct mtd_info *master, const char *name,
- long long offset, long long length)
-{
- return __mtd_add_partition(master, name, offset, length, true);
-}
-
int mtd_del_partition(struct mtd_info *master, int partno)
{
struct mtd_part *slave, *next;
@@ -707,166 +695,6 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
-static int
-run_parsers_by_type(struct mtd_part *slave, enum mtd_parser_type type)
-{
- struct mtd_partition *parts;
- int nr_parts;
- int i;
-
- nr_parts = parse_mtd_partitions_by_type(&slave->mtd, type, &parts,
- NULL);
- if (nr_parts <= 0)
- return nr_parts;
-
- if (WARN_ON(!parts))
- return 0;
-
- for (i = 0; i < nr_parts; i++) {
- /* adjust partition offsets */
- parts[i].offset += slave->offset;
-
- __mtd_add_partition(slave->master,
- parts[i].name,
- parts[i].offset,
- parts[i].size,
- false);
- }
-
- kfree(parts);
-
- return nr_parts;
-}
-
-static inline unsigned long
-mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
-{
- unsigned long mask = mtd->erasesize - 1;
-
- len += offset & mask;
- len = (len + mask) & ~mask;
- len -= offset & mask;
- return len;
-}
-
-static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
-{
- size_t squashfs_len;
- int len, ret;
-
- ret = mtd_get_squashfs_len(master, offset, &squashfs_len);
- if (ret)
- return ret;
-
- len = mtd_pad_erasesize(master, offset, squashfs_len);
- *split_offset = offset + len;
-
- return 0;
-}
-
-static void split_rootfs_data(struct mtd_info *master, struct mtd_part *part)
-{
- unsigned int split_offset = 0;
- unsigned int split_size;
- int ret;
-
- ret = split_squashfs(master, part->offset, &split_offset);
- if (ret)
- return;
-
- if (split_offset <= 0)
- return;
-
- if (config_enabled(CONFIG_MTD_SPLIT_SQUASHFS_ROOT))
- pr_err("Dedicated partitioner didn't create \"rootfs_data\" partition, please fill a bug report!\n");
- else
- pr_warn("Support for built-in \"rootfs_data\" splitter will be removed, please use CONFIG_MTD_SPLIT_SQUASHFS_ROOT\n");
-
- split_size = part->mtd.size - (split_offset - part->offset);
- printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=0x%x, len=0x%x\n",
- ROOTFS_SPLIT_NAME, split_offset, split_size);
-
- __mtd_add_partition(master, ROOTFS_SPLIT_NAME, split_offset,
- split_size, false);
-}
-
-#define UBOOT_MAGIC 0x27051956
-
-static void split_uimage(struct mtd_info *master, struct mtd_part *part)
-{
- struct {
- __be32 magic;
- __be32 pad[2];
- __be32 size;
- } hdr;
- size_t len;
-
- if (mtd_read(master, part->offset, sizeof(hdr), &len, (void *) &hdr))
- return;
-
- if (len != sizeof(hdr) || hdr.magic != cpu_to_be32(UBOOT_MAGIC))
- return;
-
- len = be32_to_cpu(hdr.size) + 0x40;
- len = mtd_pad_erasesize(master, part->offset, len);
- if (len + master->erasesize > part->mtd.size)
- return;
-
- if (config_enabled(CONFIG_MTD_SPLIT_UIMAGE_FW))
- pr_err("Dedicated partitioner didn't split firmware partition, please fill a bug report!\n");
- else
- pr_warn("Support for built-in firmware splitter will be removed, please use CONFIG_MTD_SPLIT_UIMAGE_FW\n");
-
- __mtd_add_partition(master, "rootfs", part->offset + len,
- part->mtd.size - len, false);
-}
-
-#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
-#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
-#else
-#define SPLIT_FIRMWARE_NAME "unused"
-#endif
-
-static void split_firmware(struct mtd_info *master, struct mtd_part *part)
-{
- int ret;
-
- ret = run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
- if (ret > 0)
- return;
-
- if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
- split_uimage(master, part);
-}
-
-void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
- int offset, int size)
-{
-}
-
-static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part)
-{
- static int rootfs_found = 0;
-
- if (rootfs_found)
- return;
-
- if (!strcmp(part->mtd.name, "rootfs")) {
- int num = run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
-
- if (num <= 0 && config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
- split_rootfs_data(master, part);
-
- rootfs_found = 1;
- }
-
- if (!strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
- config_enabled(CONFIG_MTD_SPLIT_FIRMWARE))
- split_firmware(master, part);
-
- arch_split_mtd_part(master, part->mtd.name, part->offset,
- part->mtd.size);
-}
/*
* This function, given a master MTD object and a partition table, creates
* and registers slave MTD objects which are bound to the master according to
@@ -896,7 +724,6 @@ int add_mtd_partitions(struct mtd_info *
mutex_unlock(&mtd_partitions_mutex);
add_mtd_device(&slave->mtd);
- mtd_partition_split(master, slave);
cur_offset = slave->offset + slave->mtd.size;
}
@@ -926,30 +753,6 @@ static struct mtd_part_parser *get_parti
#define put_partition_parser(p) do { module_put((p)->owner); } while (0)
-static struct mtd_part_parser *
-get_partition_parser_by_type(enum mtd_parser_type type,
- struct mtd_part_parser *start)
-{
- struct mtd_part_parser *p, *ret = NULL;
-
- spin_lock(&part_parser_lock);
-
- p = list_prepare_entry(start, &part_parsers, list);
- if (start)
- put_partition_parser(start);
-
- list_for_each_entry_continue(p, &part_parsers, list) {
- if (p->type == type && try_module_get(p->owner)) {
- ret = p;
- break;
- }
- }
-
- spin_unlock(&part_parser_lock);
-
- return ret;
-}
-
void register_mtd_parser(struct mtd_part_parser *p)
{
spin_lock(&part_parser_lock);
@@ -1023,38 +826,6 @@ int parse_mtd_partitions(struct mtd_info
return ret;
}
-int parse_mtd_partitions_by_type(struct mtd_info *master,
- enum mtd_parser_type type,
- struct mtd_partition **pparts,
- struct mtd_part_parser_data *data)
-{
- struct mtd_part_parser *prev = NULL;
- int ret = 0;
-
- while (1) {
- struct mtd_part_parser *parser;
-
- parser = get_partition_parser_by_type(type, prev);
- if (!parser)
- break;
-
- ret = (*parser->parse_fn)(master, pparts, data);
-
- if (ret > 0) {
- put_partition_parser(parser);
- printk(KERN_NOTICE
- "%d %s partitions found on MTD device %s\n",
- ret, parser->name, master->name);
- break;
- }
-
- prev = parser;
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(parse_mtd_partitions_by_type);
-
int mtd_is_partition(const struct mtd_info *mtd)
{
struct mtd_part *part;
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