* can be written into a single eraseblock. In that case, garbage collection
* consists of just writing the whole table, which therefore makes all other
* eraseblocks reusable. In the case of the big model, dirty eraseblocks are
- * selected for garbage collection, which consists are marking the nodes in
+ * selected for garbage collection, which consists of marking the clean nodes in
* that LEB as dirty, and then only the dirty nodes are written out. Also, in
* the case of the big model, a table of LEB numbers is saved so that the entire
* LPT does not to be scanned looking for empty eraseblocks when UBIFS is first
* mounted.
*/
-#include <linux/crc16.h>
#include "ubifs.h"
+#include <linux/crc16.h>
+#include <linux/math64.h>
+#include <linux/slab.h>
/**
* do_calc_lpt_geom - calculate sizes for the LPT area.
int ubifs_calc_lpt_geom(struct ubifs_info *c)
{
int lebs_needed;
- uint64_t sz;
+ long long sz;
do_calc_lpt_geom(c);
/* Verify that lpt_lebs is big enough */
sz = c->lpt_sz * 2; /* Must have at least 2 times the size */
- sz += c->leb_size - 1;
- do_div(sz, c->leb_size);
- lebs_needed = sz;
+ lebs_needed = div_u64(sz + c->leb_size - 1, c->leb_size);
if (lebs_needed > c->lpt_lebs) {
ubifs_err("too few LPT LEBs");
return -EINVAL;
}
c->check_lpt_free = c->big_lpt;
-
return 0;
}
int *big_lpt)
{
int i, lebs_needed;
- uint64_t sz;
+ long long sz;
/* Start by assuming the minimum number of LPT LEBs */
c->lpt_lebs = UBIFS_MIN_LPT_LEBS;
/* Now check there are enough LPT LEBs */
for (i = 0; i < 64 ; i++) {
sz = c->lpt_sz * 4; /* Allow 4 times the size */
- sz += c->leb_size - 1;
- do_div(sz, c->leb_size);
- lebs_needed = sz;
+ lebs_needed = div_u64(sz + c->leb_size - 1, c->leb_size);
if (lebs_needed > c->lpt_lebs) {
/* Not enough LPT LEBs so try again with more */
c->lpt_lebs = lebs_needed;
* This function calculates and returns the nnode number based on the parent's
* nnode number and the index in parent.
*/
-static int calc_nnode_num_from_parent(struct ubifs_info *c,
+static int calc_nnode_num_from_parent(const struct ubifs_info *c,
struct ubifs_nnode *parent, int iip)
{
int num, shft;
* This function calculates and returns the pnode number based on the parent's
* nnode number and the index in parent.
*/
-static int calc_pnode_num_from_parent(struct ubifs_info *c,
+static int calc_pnode_num_from_parent(const struct ubifs_info *c,
struct ubifs_nnode *parent, int iip)
{
int i, n = c->lpt_hght - 1, pnum = parent->num, num = 0;
*
* This function returns %0 on success and a negative error code on failure.
*/
-static int unpack_pnode(struct ubifs_info *c, void *buf,
+static int unpack_pnode(const struct ubifs_info *c, void *buf,
struct ubifs_pnode *pnode)
{
uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
}
/**
- * unpack_nnode - unpack a nnode.
+ * ubifs_unpack_nnode - unpack a nnode.
* @c: UBIFS file-system description object
* @buf: buffer containing packed nnode to unpack
* @nnode: nnode structure to fill
*
* This function returns %0 on success and a negative error code on failure.
*/
-static int unpack_nnode(struct ubifs_info *c, void *buf,
- struct ubifs_nnode *nnode)
+int ubifs_unpack_nnode(const struct ubifs_info *c, void *buf,
+ struct ubifs_nnode *nnode)
{
uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
int i, pos = 0, err;
*
* This function returns %0 on success and a negative error code on failure.
*/
-static int unpack_ltab(struct ubifs_info *c, void *buf)
+static int unpack_ltab(const struct ubifs_info *c, void *buf)
{
uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
int i, pos = 0, err;
*
* This function returns %0 on success and a negative error code on failure.
*/
-static int unpack_lsave(struct ubifs_info *c, void *buf)
+static int unpack_lsave(const struct ubifs_info *c, void *buf)
{
uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
int i, pos = 0, err;
*
* This function returns %0 on success and a negative error code on failure.
*/
-static int validate_nnode(struct ubifs_info *c, struct ubifs_nnode *nnode,
+static int validate_nnode(const struct ubifs_info *c, struct ubifs_nnode *nnode,
struct ubifs_nnode *parent, int iip)
{
int i, lvl, max_offs;
*
* This function returns %0 on success and a negative error code on failure.
*/
-static int validate_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
+static int validate_pnode(const struct ubifs_info *c, struct ubifs_pnode *pnode,
struct ubifs_nnode *parent, int iip)
{
int i;
* This function calculates the LEB numbers for the LEB properties it contains
* based on the pnode number.
*/
-static void set_pnode_lnum(struct ubifs_info *c, struct ubifs_pnode *pnode)
+static void set_pnode_lnum(const struct ubifs_info *c,
+ struct ubifs_pnode *pnode)
{
int i, lnum;
err = ubi_read(c->ubi, lnum, buf, offs, c->nnode_sz);
if (err)
goto out;
- err = unpack_nnode(c, buf, nnode);
+ err = ubifs_unpack_nnode(c, buf, nnode);
if (err)
goto out;
}
c->nnode_sz);
if (err)
return ERR_PTR(err);
- err = unpack_nnode(c, buf, nnode);
+ err = ubifs_unpack_nnode(c, buf, nnode);
if (err)
return ERR_PTR(err);
}