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-rw-r--r--fs/ext4/ext4_common.c815
-rw-r--r--fs/ext4/ext4_common.h20
-rw-r--r--fs/ext4/ext4_journal.c21
-rw-r--r--fs/ext4/ext4_journal.h44
-rw-r--r--fs/ext4/ext4_write.c486
-rw-r--r--fs/ext4/ext4fs.c2
6 files changed, 770 insertions, 618 deletions
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index eb49fce04c..e78185b53b 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -33,20 +33,156 @@
struct ext2_data *ext4fs_root;
struct ext2fs_node *ext4fs_file;
-uint32_t *ext4fs_indir1_block;
+__le32 *ext4fs_indir1_block;
int ext4fs_indir1_size;
int ext4fs_indir1_blkno = -1;
-uint32_t *ext4fs_indir2_block;
+__le32 *ext4fs_indir2_block;
int ext4fs_indir2_size;
int ext4fs_indir2_blkno = -1;
-uint32_t *ext4fs_indir3_block;
+__le32 *ext4fs_indir3_block;
int ext4fs_indir3_size;
int ext4fs_indir3_blkno = -1;
struct ext2_inode *g_parent_inode;
static int symlinknest;
#if defined(CONFIG_EXT4_WRITE)
+struct ext2_block_group *ext4fs_get_group_descriptor
+ (const struct ext_filesystem *fs, uint32_t bg_idx)
+{
+ return (struct ext2_block_group *)(fs->gdtable + (bg_idx * fs->gdsize));
+}
+
+static inline void ext4fs_sb_free_inodes_dec(struct ext2_sblock *sb)
+{
+ sb->free_inodes = cpu_to_le32(le32_to_cpu(sb->free_inodes) - 1);
+}
+
+static inline void ext4fs_sb_free_blocks_dec(struct ext2_sblock *sb)
+{
+ uint64_t free_blocks = le32_to_cpu(sb->free_blocks);
+ free_blocks += (uint64_t)le32_to_cpu(sb->free_blocks_high) << 32;
+ free_blocks--;
+
+ sb->free_blocks = cpu_to_le32(free_blocks & 0xffffffff);
+ sb->free_blocks_high = cpu_to_le16(free_blocks >> 32);
+}
+
+static inline void ext4fs_bg_free_inodes_dec
+ (struct ext2_block_group *bg, const struct ext_filesystem *fs)
+{
+ uint32_t free_inodes = le16_to_cpu(bg->free_inodes);
+ if (fs->gdsize == 64)
+ free_inodes += le16_to_cpu(bg->free_inodes_high) << 16;
+ free_inodes--;
+
+ bg->free_inodes = cpu_to_le16(free_inodes & 0xffff);
+ if (fs->gdsize == 64)
+ bg->free_inodes_high = cpu_to_le16(free_inodes >> 16);
+}
+
+static inline void ext4fs_bg_free_blocks_dec
+ (struct ext2_block_group *bg, const struct ext_filesystem *fs)
+{
+ uint32_t free_blocks = le16_to_cpu(bg->free_blocks);
+ if (fs->gdsize == 64)
+ free_blocks += le16_to_cpu(bg->free_blocks_high) << 16;
+ free_blocks--;
+
+ bg->free_blocks = cpu_to_le16(free_blocks & 0xffff);
+ if (fs->gdsize == 64)
+ bg->free_blocks_high = cpu_to_le16(free_blocks >> 16);
+}
+
+static inline void ext4fs_bg_itable_unused_dec
+ (struct ext2_block_group *bg, const struct ext_filesystem *fs)
+{
+ uint32_t free_inodes = le16_to_cpu(bg->bg_itable_unused);
+ if (fs->gdsize == 64)
+ free_inodes += le16_to_cpu(bg->bg_itable_unused_high) << 16;
+ free_inodes--;
+
+ bg->bg_itable_unused = cpu_to_le16(free_inodes & 0xffff);
+ if (fs->gdsize == 64)
+ bg->bg_itable_unused_high = cpu_to_le16(free_inodes >> 16);
+}
+
+uint64_t ext4fs_sb_get_free_blocks(const struct ext2_sblock *sb)
+{
+ uint64_t free_blocks = le32_to_cpu(sb->free_blocks);
+ free_blocks += (uint64_t)le32_to_cpu(sb->free_blocks_high) << 32;
+ return free_blocks;
+}
+
+void ext4fs_sb_set_free_blocks(struct ext2_sblock *sb, uint64_t free_blocks)
+{
+ sb->free_blocks = cpu_to_le32(free_blocks & 0xffffffff);
+ sb->free_blocks_high = cpu_to_le16(free_blocks >> 32);
+}
+
+uint32_t ext4fs_bg_get_free_blocks(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs)
+{
+ uint32_t free_blocks = le16_to_cpu(bg->free_blocks);
+ if (fs->gdsize == 64)
+ free_blocks += le16_to_cpu(bg->free_blocks_high) << 16;
+ return free_blocks;
+}
+
+static inline
+uint32_t ext4fs_bg_get_free_inodes(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs)
+{
+ uint32_t free_inodes = le16_to_cpu(bg->free_inodes);
+ if (fs->gdsize == 64)
+ free_inodes += le16_to_cpu(bg->free_inodes_high) << 16;
+ return free_inodes;
+}
+
+static inline uint16_t ext4fs_bg_get_flags(const struct ext2_block_group *bg)
+{
+ return le16_to_cpu(bg->bg_flags);
+}
+
+static inline void ext4fs_bg_set_flags(struct ext2_block_group *bg,
+ uint16_t flags)
+{
+ bg->bg_flags = cpu_to_le16(flags);
+}
+
+/* Block number of the block bitmap */
+uint64_t ext4fs_bg_get_block_id(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs)
+{
+ uint64_t block_nr = le32_to_cpu(bg->block_id);
+ if (fs->gdsize == 64)
+ block_nr += (uint64_t)le32_to_cpu(bg->block_id_high) << 32;
+ return block_nr;
+}
+
+/* Block number of the inode bitmap */
+uint64_t ext4fs_bg_get_inode_id(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs)
+{
+ uint64_t block_nr = le32_to_cpu(bg->inode_id);
+ if (fs->gdsize == 64)
+ block_nr += (uint64_t)le32_to_cpu(bg->inode_id_high) << 32;
+ return block_nr;
+}
+#endif
+
+/* Block number of the inode table */
+uint64_t ext4fs_bg_get_inode_table_id(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs)
+{
+ uint64_t block_nr = le32_to_cpu(bg->inode_table_id);
+ if (fs->gdsize == 64)
+ block_nr +=
+ (uint64_t)le32_to_cpu(bg->inode_table_id_high) << 32;
+ return block_nr;
+}
+
+#if defined(CONFIG_EXT4_WRITE)
uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n)
{
uint32_t res = size / n;
@@ -112,7 +248,7 @@ static int _get_new_inode_no(unsigned char *buffer)
while (*ptr == 255) {
ptr++;
count += 8;
- if (count > ext4fs_root->sblock.inodes_per_group)
+ if (count > le32_to_cpu(ext4fs_root->sblock.inodes_per_group))
return -1;
}
@@ -138,18 +274,12 @@ static int _get_new_inode_no(unsigned char *buffer)
static int _get_new_blk_no(unsigned char *buffer)
{
- unsigned char input;
- int operand, status;
+ int operand;
int count = 0;
- int j = 0;
+ int i;
unsigned char *ptr = buffer;
struct ext_filesystem *fs = get_fs();
- if (fs->blksz != 1024)
- count = 0;
- else
- count = 1;
-
while (*ptr == 255) {
ptr++;
count += 8;
@@ -157,21 +287,17 @@ static int _get_new_blk_no(unsigned char *buffer)
return -1;
}
- for (j = 0; j < fs->blksz; j++) {
- input = *ptr;
- int i = 0;
- while (i <= 7) {
- operand = 1 << i;
- status = input & operand;
- if (status) {
- i++;
- count++;
- } else {
- *ptr |= operand;
- return count;
- }
+ if (fs->blksz == 1024)
+ count += 1;
+
+ for (i = 0; i <= 7; i++) {
+ operand = 1 << i;
+ if (*ptr & operand) {
+ count++;
+ } else {
+ *ptr |= operand;
+ return count;
}
- ptr = ptr + 1;
}
return -1;
@@ -249,7 +375,7 @@ int ext4fs_set_inode_bmap(int inode_no, unsigned char *buffer, int index)
unsigned char *ptr = buffer;
unsigned char operand;
- inode_no -= (index * ext4fs_root->sblock.inodes_per_group);
+ inode_no -= (index * le32_to_cpu(ext4fs_root->sblock.inodes_per_group));
i = inode_no / 8;
remainder = inode_no % 8;
if (remainder == 0) {
@@ -274,7 +400,7 @@ void ext4fs_reset_inode_bmap(int inode_no, unsigned char *buffer, int index)
unsigned char *ptr = buffer;
unsigned char operand;
- inode_no -= (index * ext4fs_root->sblock.inodes_per_group);
+ inode_no -= (index * le32_to_cpu(ext4fs_root->sblock.inodes_per_group));
i = inode_no / 8;
remainder = inode_no % 8;
if (remainder == 0) {
@@ -289,19 +415,20 @@ void ext4fs_reset_inode_bmap(int inode_no, unsigned char *buffer, int index)
*ptr = *ptr & ~(operand);
}
-int ext4fs_checksum_update(unsigned int i)
+uint16_t ext4fs_checksum_update(uint32_t i)
{
struct ext2_block_group *desc;
struct ext_filesystem *fs = get_fs();
- __u16 crc = 0;
+ uint16_t crc = 0;
+ __le32 le32_i = cpu_to_le32(i);
- desc = (struct ext2_block_group *)&fs->bgd[i];
- if (fs->sb->feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
+ desc = ext4fs_get_group_descriptor(fs, i);
+ if (le32_to_cpu(fs->sb->feature_ro_compat) & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
int offset = offsetof(struct ext2_block_group, bg_checksum);
crc = ext2fs_crc16(~0, fs->sb->unique_id,
sizeof(fs->sb->unique_id));
- crc = ext2fs_crc16(crc, &i, sizeof(i));
+ crc = ext2fs_crc16(crc, &le32_i, sizeof(le32_i));
crc = ext2fs_crc16(crc, desc, offset);
offset += sizeof(desc->bg_checksum); /* skip checksum */
assert(offset == sizeof(*desc));
@@ -322,7 +449,7 @@ static int check_void_in_dentry(struct ext2_dirent *dir, char *filename)
dentry_length = sizeof(struct ext2_dirent) +
dir->namelen + padding_factor;
- sizeof_void_space = dir->direntlen - dentry_length;
+ sizeof_void_space = le16_to_cpu(dir->direntlen) - dentry_length;
if (sizeof_void_space == 0)
return 0;
@@ -333,58 +460,57 @@ static int check_void_in_dentry(struct ext2_dirent *dir, char *filename)
new_entry_byte_reqd = strlen(filename) +
sizeof(struct ext2_dirent) + padding_factor;
if (sizeof_void_space >= new_entry_byte_reqd) {
- dir->direntlen = dentry_length;
+ dir->direntlen = cpu_to_le16(dentry_length);
return sizeof_void_space;
}
return 0;
}
-void ext4fs_update_parent_dentry(char *filename, int *p_ino, int file_type)
+int ext4fs_update_parent_dentry(char *filename, int file_type)
{
unsigned int *zero_buffer = NULL;
char *root_first_block_buffer = NULL;
- int direct_blk_idx;
- long int root_blknr;
+ int blk_idx;
long int first_block_no_of_root = 0;
- long int previous_blknr = -1;
int totalbytes = 0;
- short int padding_factor = 0;
unsigned int new_entry_byte_reqd;
- unsigned int last_entry_dirlen;
int sizeof_void_space = 0;
int templength = 0;
- int inodeno;
+ int inodeno = -1;
int status;
struct ext_filesystem *fs = get_fs();
/* directory entry */
struct ext2_dirent *dir;
char *temp_dir = NULL;
+ uint32_t new_blk_no;
+ uint32_t new_size;
+ uint32_t new_blockcnt;
+ uint32_t directory_blocks;
zero_buffer = zalloc(fs->blksz);
if (!zero_buffer) {
printf("No Memory\n");
- return;
+ return -1;
}
root_first_block_buffer = zalloc(fs->blksz);
if (!root_first_block_buffer) {
free(zero_buffer);
printf("No Memory\n");
- return;
+ return -1;
}
+ new_entry_byte_reqd = ROUND(strlen(filename) +
+ sizeof(struct ext2_dirent), 4);
restart:
+ directory_blocks = le32_to_cpu(g_parent_inode->size) >>
+ LOG2_BLOCK_SIZE(ext4fs_root);
+ blk_idx = directory_blocks - 1;
+restart_read:
/* read the block no allocated to a file */
- for (direct_blk_idx = 0; direct_blk_idx < INDIRECT_BLOCKS;
- direct_blk_idx++) {
- root_blknr = read_allocated_block(g_parent_inode,
- direct_blk_idx);
- if (root_blknr == 0) {
- first_block_no_of_root = previous_blknr;
- break;
- }
- previous_blknr = root_blknr;
- }
+ first_block_no_of_root = read_allocated_block(g_parent_inode, blk_idx);
+ if (first_block_no_of_root <= 0)
+ goto fail;
status = ext4fs_devread((lbaint_t)first_block_no_of_root
* fs->sect_perblk,
@@ -396,66 +522,63 @@ restart:
goto fail;
dir = (struct ext2_dirent *)root_first_block_buffer;
totalbytes = 0;
- while (dir->direntlen > 0) {
- /*
- * blocksize-totalbytes because last directory length
- * i.e. dir->direntlen is free availble space in the
- * block that means it is a last entry of directory
- * entry
- */
- /* traversing the each directory entry */
- if (fs->blksz - totalbytes == dir->direntlen) {
- if (strlen(filename) % 4 != 0)
- padding_factor = 4 - (strlen(filename) % 4);
-
- new_entry_byte_reqd = strlen(filename) +
- sizeof(struct ext2_dirent) + padding_factor;
- padding_factor = 0;
- /*
- * update last directory entry length to its
- * length because we are creating new directory
- * entry
- */
- if (dir->namelen % 4 != 0)
- padding_factor = 4 - (dir->namelen % 4);
-
- last_entry_dirlen = dir->namelen +
- sizeof(struct ext2_dirent) + padding_factor;
- if ((fs->blksz - totalbytes - last_entry_dirlen) <
- new_entry_byte_reqd) {
- printf("1st Block Full:Allocate new block\n");
-
- if (direct_blk_idx == INDIRECT_BLOCKS - 1) {
+ while (le16_to_cpu(dir->direntlen) > 0) {
+ unsigned short used_len = ROUND(dir->namelen +
+ sizeof(struct ext2_dirent), 4);
+
+ /* last entry of block */
+ if (fs->blksz - totalbytes == le16_to_cpu(dir->direntlen)) {
+
+ /* check if new entry fits */
+ if ((used_len + new_entry_byte_reqd) <=
+ le16_to_cpu(dir->direntlen)) {
+ dir->direntlen = cpu_to_le16(used_len);
+ break;
+ } else {
+ if (blk_idx > 0) {
+ printf("Block full, trying previous\n");
+ blk_idx--;
+ goto restart_read;
+ }
+ printf("All blocks full: Allocate new\n");
+
+ if (le32_to_cpu(g_parent_inode->flags) &
+ EXT4_EXTENTS_FL) {
+ printf("Directory uses extents\n");
+ goto fail;
+ }
+ if (directory_blocks >= INDIRECT_BLOCKS) {
printf("Directory exceeds limit\n");
goto fail;
}
- g_parent_inode->b.blocks.dir_blocks
- [direct_blk_idx] = ext4fs_get_new_blk_no();
- if (g_parent_inode->b.blocks.dir_blocks
- [direct_blk_idx] == -1) {
+ new_blk_no = ext4fs_get_new_blk_no();
+ if (new_blk_no == -1) {
printf("no block left to assign\n");
goto fail;
}
- put_ext4(((uint64_t)
- ((uint64_t)g_parent_inode->b.
- blocks.dir_blocks[direct_blk_idx] *
- (uint64_t)fs->blksz)), zero_buffer, fs->blksz);
- g_parent_inode->size =
- g_parent_inode->size + fs->blksz;
- g_parent_inode->blockcnt =
- g_parent_inode->blockcnt + fs->sect_perblk;
+ put_ext4((uint64_t)new_blk_no * fs->blksz, zero_buffer, fs->blksz);
+ g_parent_inode->b.blocks.
+ dir_blocks[directory_blocks] =
+ cpu_to_le32(new_blk_no);
+
+ new_size = le32_to_cpu(g_parent_inode->size);
+ new_size += fs->blksz;
+ g_parent_inode->size = cpu_to_le32(new_size);
+
+ new_blockcnt = le32_to_cpu(g_parent_inode->blockcnt);
+ new_blockcnt += fs->sect_perblk;
+ g_parent_inode->blockcnt = cpu_to_le32(new_blockcnt);
+
if (ext4fs_put_metadata
(root_first_block_buffer,
first_block_no_of_root))
goto fail;
goto restart;
}
- dir->direntlen = last_entry_dirlen;
- break;
}
- templength = dir->direntlen;
+ templength = le16_to_cpu(dir->direntlen);
totalbytes = totalbytes + templength;
sizeof_void_space = check_void_in_dentry(dir, filename);
if (sizeof_void_space)
@@ -465,7 +588,7 @@ restart:
}
/* make a pointer ready for creating next directory entry */
- templength = dir->direntlen;
+ templength = le16_to_cpu(dir->direntlen);
totalbytes = totalbytes + templength;
dir = (struct ext2_dirent *)((char *)dir + templength);
@@ -475,11 +598,11 @@ restart:
printf("no inode left to assign\n");
goto fail;
}
- dir->inode = inodeno;
+ dir->inode = cpu_to_le32(inodeno);
if (sizeof_void_space)
- dir->direntlen = sizeof_void_space;
+ dir->direntlen = cpu_to_le16(sizeof_void_space);
else
- dir->direntlen = fs->blksz - totalbytes;
+ dir->direntlen = cpu_to_le16(fs->blksz - totalbytes);
dir->namelen = strlen(filename);
dir->filetype = FILETYPE_REG; /* regular file */
@@ -487,8 +610,6 @@ restart:
temp_dir = temp_dir + sizeof(struct ext2_dirent);
memcpy(temp_dir, filename, strlen(filename));
- *p_ino = inodeno;
-
/* update or write the 1st block of root inode */
if (ext4fs_put_metadata(root_first_block_buffer,
first_block_no_of_root))
@@ -497,82 +618,65 @@ restart:
fail:
free(zero_buffer);
free(root_first_block_buffer);
+
+ return inodeno;
}
static int search_dir(struct ext2_inode *parent_inode, char *dirname)
{
int status;
- int inodeno;
- int totalbytes;
- int templength;
- int direct_blk_idx;
+ int inodeno = 0;
+ int offset;
+ int blk_idx;
long int blknr;
- int found = 0;
- char *ptr = NULL;
- unsigned char *block_buffer = NULL;
+ char *block_buffer = NULL;
struct ext2_dirent *dir = NULL;
- struct ext2_dirent *previous_dir = NULL;
struct ext_filesystem *fs = get_fs();
+ uint32_t directory_blocks;
+ char *direntname;
- /* read the block no allocated to a file */
- for (direct_blk_idx = 0; direct_blk_idx < INDIRECT_BLOCKS;
- direct_blk_idx++) {
- blknr = read_allocated_block(parent_inode, direct_blk_idx);
- if (blknr == 0)
- goto fail;
+ directory_blocks = le32_to_cpu(parent_inode->size) >>
+ LOG2_BLOCK_SIZE(ext4fs_root);
+
+ block_buffer = zalloc(fs->blksz);
+ if (!block_buffer)
+ goto fail;
- /* read the blocks of parenet inode */
- block_buffer = zalloc(fs->blksz);
- if (!block_buffer)
+ /* get the block no allocated to a file */
+ for (blk_idx = 0; blk_idx < directory_blocks; blk_idx++) {
+ blknr = read_allocated_block(parent_inode, blk_idx);
+ if (blknr <= 0)
goto fail;
+ /* read the directory block */
status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk,
0, fs->blksz, (char *)block_buffer);
if (status == 0)
goto fail;
- dir = (struct ext2_dirent *)block_buffer;
- ptr = (char *)dir;
- totalbytes = 0;
- while (dir->direntlen >= 0) {
- /*
- * blocksize-totalbytes because last directory
- * length i.e.,*dir->direntlen is free availble
- * space in the block that means
- * it is a last entry of directory entry
- */
- if (strlen(dirname) == dir->namelen) {
- if (strncmp(dirname, ptr +
- sizeof(struct ext2_dirent),
- dir->namelen) == 0) {
- previous_dir->direntlen +=
- dir->direntlen;
- inodeno = dir->inode;
- dir->inode = 0;
- found = 1;
- break;
- }
- }
+ offset = 0;
+ do {
+ dir = (struct ext2_dirent *)(block_buffer + offset);
+ direntname = (char*)(dir) + sizeof(struct ext2_dirent);
- if (fs->blksz - totalbytes == dir->direntlen)
+ int direntlen = le16_to_cpu(dir->direntlen);
+ if (direntlen < sizeof(struct ext2_dirent))
break;
- /* traversing the each directory entry */
- templength = dir->direntlen;
- totalbytes = totalbytes + templength;
- previous_dir = dir;
- dir = (struct ext2_dirent *)((char *)dir + templength);
- ptr = (char *)dir;
- }
+ if (dir->inode && (strlen(dirname) == dir->namelen) &&
+ (strncmp(dirname, direntname, dir->namelen) == 0)) {
+ inodeno = le32_to_cpu(dir->inode);
+ break;
+ }
+
+ offset += direntlen;
+
+ } while (offset < fs->blksz);
- if (found == 1) {
+ if (inodeno > 0) {
free(block_buffer);
- block_buffer = NULL;
return inodeno;
}
-
- free(block_buffer);
- block_buffer = NULL;
}
fail:
@@ -720,7 +824,7 @@ end:
if (matched_inode_no != -1) {
ext4fs_iget(matched_inode_no, &temp_inode);
- if (temp_inode.mode & S_IFDIR) {
+ if (le16_to_cpu(temp_inode.mode) & S_IFDIR) {
printf("It is a Directory\n");
result_inode_no = -1;
goto fail;
@@ -748,15 +852,13 @@ fail:
return result_inode_no;
}
-static int check_filename(char *filename, unsigned int blknr)
+static int unlink_filename(char *filename, unsigned int blknr)
{
- unsigned int first_block_no_of_root;
int totalbytes = 0;
int templength = 0;
int status, inodeno;
int found = 0;
char *root_first_block_buffer = NULL;
- char *root_first_block_addr = NULL;
struct ext2_dirent *dir = NULL;
struct ext2_dirent *previous_dir = NULL;
char *ptr = NULL;
@@ -764,46 +866,48 @@ static int check_filename(char *filename, unsigned int blknr)
int ret = -1;
/* get the first block of root */
- first_block_no_of_root = blknr;
root_first_block_buffer = zalloc(fs->blksz);
if (!root_first_block_buffer)
return -ENOMEM;
- root_first_block_addr = root_first_block_buffer;
- status = ext4fs_devread((lbaint_t)first_block_no_of_root *
- fs->sect_perblk, 0,
+ status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
fs->blksz, root_first_block_buffer);
if (status == 0)
goto fail;
- if (ext4fs_log_journal(root_first_block_buffer, first_block_no_of_root))
+ if (ext4fs_log_journal(root_first_block_buffer, blknr))
goto fail;
dir = (struct ext2_dirent *)root_first_block_buffer;
ptr = (char *)dir;
totalbytes = 0;
- while (dir->direntlen >= 0) {
+ while (le16_to_cpu(dir->direntlen) >= 0) {
/*
* blocksize-totalbytes because last
* directory length i.e., *dir->direntlen
* is free availble space in the block that
* means it is a last entry of directory entry
*/
- if (strlen(filename) == dir->namelen) {
- if (strncmp(filename, ptr + sizeof(struct ext2_dirent),
- dir->namelen) == 0) {
- printf("file found deleting\n");
- previous_dir->direntlen += dir->direntlen;
- inodeno = dir->inode;
+ if (dir->inode && (strlen(filename) == dir->namelen) &&
+ (strncmp(ptr + sizeof(struct ext2_dirent),
+ filename, dir->namelen) == 0)) {
+ printf("file found, deleting\n");
+ inodeno = le32_to_cpu(dir->inode);
+ if (previous_dir) {
+ uint16_t new_len;
+ new_len = le16_to_cpu(previous_dir->direntlen);
+ new_len += le16_to_cpu(dir->direntlen);
+ previous_dir->direntlen = cpu_to_le16(new_len);
+ } else {
dir->inode = 0;
- found = 1;
- break;
}
+ found = 1;
+ break;
}
- if (fs->blksz - totalbytes == dir->direntlen)
+ if (fs->blksz - totalbytes == le16_to_cpu(dir->direntlen))
break;
/* traversing the each directory entry */
- templength = dir->direntlen;
+ templength = le16_to_cpu(dir->direntlen);
totalbytes = totalbytes + templength;
previous_dir = dir;
dir = (struct ext2_dirent *)((char *)dir + templength);
@@ -812,8 +916,7 @@ static int check_filename(char *filename, unsigned int blknr)
if (found == 1) {
- if (ext4fs_put_metadata(root_first_block_addr,
- first_block_no_of_root))
+ if (ext4fs_put_metadata(root_first_block_buffer, blknr))
goto fail;
ret = inodeno;
}
@@ -823,19 +926,22 @@ fail:
return ret;
}
-int ext4fs_filename_check(char *filename)
+int ext4fs_filename_unlink(char *filename)
{
- short direct_blk_idx = 0;
+ int blk_idx;
long int blknr = -1;
int inodeno = -1;
+ uint32_t directory_blocks;
+
+ directory_blocks = le32_to_cpu(g_parent_inode->size) >>
+ LOG2_BLOCK_SIZE(ext4fs_root);
/* read the block no allocated to a file */
- for (direct_blk_idx = 0; direct_blk_idx < INDIRECT_BLOCKS;
- direct_blk_idx++) {
- blknr = read_allocated_block(g_parent_inode, direct_blk_idx);
- if (blknr == 0)
+ for (blk_idx = 0; blk_idx < directory_blocks; blk_idx++) {
+ blknr = read_allocated_block(g_parent_inode, blk_idx);
+ if (blknr <= 0)
break;
- inodeno = check_filename(filename, blknr);
+ inodeno = unlink_filename(filename, blknr);
if (inodeno != -1)
return inodeno;
}
@@ -843,53 +949,54 @@ int ext4fs_filename_check(char *filename)
return -1;
}
-long int ext4fs_get_new_blk_no(void)
+uint32_t ext4fs_get_new_blk_no(void)
{
short i;
short status;
int remainder;
unsigned int bg_idx;
static int prev_bg_bitmap_index = -1;
- unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
+ unsigned int blk_per_grp = le32_to_cpu(ext4fs_root->sblock.blocks_per_group);
struct ext_filesystem *fs = get_fs();
char *journal_buffer = zalloc(fs->blksz);
char *zero_buffer = zalloc(fs->blksz);
if (!journal_buffer || !zero_buffer)
goto fail;
- struct ext2_block_group *bgd = (struct ext2_block_group *)fs->gdtable;
if (fs->first_pass_bbmap == 0) {
for (i = 0; i < fs->no_blkgrp; i++) {
- if (bgd[i].free_blocks) {
- if (bgd[i].bg_flags & EXT4_BG_BLOCK_UNINIT) {
- put_ext4(((uint64_t) ((uint64_t)bgd[i].block_id *
- (uint64_t)fs->blksz)),
- zero_buffer, fs->blksz);
- bgd[i].bg_flags =
- bgd[i].
- bg_flags & ~EXT4_BG_BLOCK_UNINIT;
+ struct ext2_block_group *bgd = NULL;
+ bgd = ext4fs_get_group_descriptor(fs, i);
+ if (ext4fs_bg_get_free_blocks(bgd, fs)) {
+ uint16_t bg_flags = ext4fs_bg_get_flags(bgd);
+ uint64_t b_bitmap_blk =
+ ext4fs_bg_get_block_id(bgd, fs);
+ if (bg_flags & EXT4_BG_BLOCK_UNINIT) {
memcpy(fs->blk_bmaps[i], zero_buffer,
fs->blksz);
+ put_ext4(b_bitmap_blk * fs->blksz,
+ fs->blk_bmaps[i], fs->blksz);
+ bg_flags &= ~EXT4_BG_BLOCK_UNINIT;
+ ext4fs_bg_set_flags(bgd, bg_flags);
}
fs->curr_blkno =
_get_new_blk_no(fs->blk_bmaps[i]);
if (fs->curr_blkno == -1)
- /* if block bitmap is completely fill */
+ /* block bitmap is completely filled */
continue;
fs->curr_blkno = fs->curr_blkno +
(i * fs->blksz * 8);
fs->first_pass_bbmap++;
- bgd[i].free_blocks--;
- fs->sb->free_blocks--;
- status = ext4fs_devread((lbaint_t)
- bgd[i].block_id *
- fs->sect_perblk, 0,
- fs->blksz,
+ ext4fs_bg_free_blocks_dec(bgd, fs);
+ ext4fs_sb_free_blocks_dec(fs->sb);
+ status = ext4fs_devread(b_bitmap_blk *
+ fs->sect_perblk,
+ 0, fs->blksz,
journal_buffer);
if (status == 0)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- bgd[i].block_id))
+ b_bitmap_blk))
goto fail;
goto success;
} else {
@@ -899,8 +1006,8 @@ long int ext4fs_get_new_blk_no(void)
goto fail;
} else {
-restart:
fs->curr_blkno++;
+restart:
/* get the blockbitmap index respective to blockno */
bg_idx = fs->curr_blkno / blk_per_grp;
if (fs->blksz == 1024) {
@@ -916,45 +1023,47 @@ restart:
if (bg_idx >= fs->no_blkgrp)
goto fail;
- if (bgd[bg_idx].free_blocks == 0) {
+ struct ext2_block_group *bgd = NULL;
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
+ if (ext4fs_bg_get_free_blocks(bgd, fs) == 0) {
debug("block group %u is full. Skipping\n", bg_idx);
- fs->curr_blkno = fs->curr_blkno + blk_per_grp;
- fs->curr_blkno--;
+ fs->curr_blkno = (bg_idx + 1) * blk_per_grp;
+ if (fs->blksz == 1024)
+ fs->curr_blkno += 1;
goto restart;
}
- if (bgd[bg_idx].bg_flags & EXT4_BG_BLOCK_UNINIT) {
- memset(zero_buffer, '\0', fs->blksz);
- put_ext4(((uint64_t) ((uint64_t)bgd[bg_idx].block_id *
- (uint64_t)fs->blksz)), zero_buffer, fs->blksz);
+ uint16_t bg_flags = ext4fs_bg_get_flags(bgd);
+ uint64_t b_bitmap_blk = ext4fs_bg_get_block_id(bgd, fs);
+ if (bg_flags & EXT4_BG_BLOCK_UNINIT) {
memcpy(fs->blk_bmaps[bg_idx], zero_buffer, fs->blksz);
- bgd[bg_idx].bg_flags = bgd[bg_idx].bg_flags &
- ~EXT4_BG_BLOCK_UNINIT;
+ put_ext4(b_bitmap_blk * fs->blksz,
+ zero_buffer, fs->blksz);
+ bg_flags &= ~EXT4_BG_BLOCK_UNINIT;
+ ext4fs_bg_set_flags(bgd, bg_flags);
}
if (ext4fs_set_block_bmap(fs->curr_blkno, fs->blk_bmaps[bg_idx],
bg_idx) != 0) {
debug("going for restart for the block no %ld %u\n",
fs->curr_blkno, bg_idx);
+ fs->curr_blkno++;
goto restart;
}
/* journal backup */
if (prev_bg_bitmap_index != bg_idx) {
- memset(journal_buffer, '\0', fs->blksz);
- status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id
- * fs->sect_perblk,
+ status = ext4fs_devread(b_bitmap_blk * fs->sect_perblk,
0, fs->blksz, journal_buffer);
if (status == 0)
goto fail;
- if (ext4fs_log_journal(journal_buffer,
- bgd[bg_idx].block_id))
+ if (ext4fs_log_journal(journal_buffer, b_bitmap_blk))
goto fail;
prev_bg_bitmap_index = bg_idx;
}
- bgd[bg_idx].free_blocks--;
- fs->sb->free_blocks--;
+ ext4fs_bg_free_blocks_dec(bgd, fs);
+ ext4fs_sb_free_blocks_dec(fs->sb);
goto success;
}
success:
@@ -975,51 +1084,55 @@ int ext4fs_get_new_inode_no(void)
short status;
unsigned int ibmap_idx;
static int prev_inode_bitmap_index = -1;
- unsigned int inodes_per_grp = ext4fs_root->sblock.inodes_per_group;
+ unsigned int inodes_per_grp = le32_to_cpu(ext4fs_root->sblock.inodes_per_group);
struct ext_filesystem *fs = get_fs();
char *journal_buffer = zalloc(fs->blksz);
char *zero_buffer = zalloc(fs->blksz);
if (!journal_buffer || !zero_buffer)
goto fail;
- struct ext2_block_group *bgd = (struct ext2_block_group *)fs->gdtable;
+ int has_gdt_chksum = le32_to_cpu(fs->sb->feature_ro_compat) &
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM ? 1 : 0;
if (fs->first_pass_ibmap == 0) {
for (i = 0; i < fs->no_blkgrp; i++) {
- if (bgd[i].free_inodes) {
- if (bgd[i].bg_itable_unused !=
- bgd[i].free_inodes)
- bgd[i].bg_itable_unused =
- bgd[i].free_inodes;
- if (bgd[i].bg_flags & EXT4_BG_INODE_UNINIT) {
- put_ext4(((uint64_t)
- ((uint64_t)bgd[i].inode_id *
- (uint64_t)fs->blksz)),
+ uint32_t free_inodes;
+ struct ext2_block_group *bgd = NULL;
+ bgd = ext4fs_get_group_descriptor(fs, i);
+ free_inodes = ext4fs_bg_get_free_inodes(bgd, fs);
+ if (free_inodes) {
+ uint16_t bg_flags = ext4fs_bg_get_flags(bgd);
+ uint64_t i_bitmap_blk =
+ ext4fs_bg_get_inode_id(bgd, fs);
+ if (has_gdt_chksum)
+ bgd->bg_itable_unused = free_inodes;
+ if (bg_flags & EXT4_BG_INODE_UNINIT) {
+ put_ext4(i_bitmap_blk * fs->blksz,
zero_buffer, fs->blksz);
- bgd[i].bg_flags = bgd[i].bg_flags &
- ~EXT4_BG_INODE_UNINIT;
+ bg_flags &= ~EXT4_BG_INODE_UNINIT;
+ ext4fs_bg_set_flags(bgd, bg_flags);
memcpy(fs->inode_bmaps[i],
zero_buffer, fs->blksz);
}
fs->curr_inode_no =
_get_new_inode_no(fs->inode_bmaps[i]);
if (fs->curr_inode_no == -1)
- /* if block bitmap is completely fill */
+ /* inode bitmap is completely filled */
continue;
fs->curr_inode_no = fs->curr_inode_no +
(i * inodes_per_grp);
fs->first_pass_ibmap++;
- bgd[i].free_inodes--;
- bgd[i].bg_itable_unused--;
- fs->sb->free_inodes--;
- status = ext4fs_devread((lbaint_t)
- bgd[i].inode_id *
- fs->sect_perblk, 0,
- fs->blksz,
+ ext4fs_bg_free_inodes_dec(bgd, fs);
+ if (has_gdt_chksum)
+ ext4fs_bg_itable_unused_dec(bgd, fs);
+ ext4fs_sb_free_inodes_dec(fs->sb);
+ status = ext4fs_devread(i_bitmap_blk *
+ fs->sect_perblk,
+ 0, fs->blksz,
journal_buffer);
if (status == 0)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- bgd[i].inode_id))
+ i_bitmap_blk))
goto fail;
goto success;
} else
@@ -1031,13 +1144,16 @@ restart:
fs->curr_inode_no++;
/* get the blockbitmap index respective to blockno */
ibmap_idx = fs->curr_inode_no / inodes_per_grp;
- if (bgd[ibmap_idx].bg_flags & EXT4_BG_INODE_UNINIT) {
- memset(zero_buffer, '\0', fs->blksz);
- put_ext4(((uint64_t) ((uint64_t)bgd[ibmap_idx].inode_id *
- (uint64_t)fs->blksz)), zero_buffer,
- fs->blksz);
- bgd[ibmap_idx].bg_flags =
- bgd[ibmap_idx].bg_flags & ~EXT4_BG_INODE_UNINIT;
+ struct ext2_block_group *bgd =
+ ext4fs_get_group_descriptor(fs, ibmap_idx);
+ uint16_t bg_flags = ext4fs_bg_get_flags(bgd);
+ uint64_t i_bitmap_blk = ext4fs_bg_get_inode_id(bgd, fs);
+
+ if (bg_flags & EXT4_BG_INODE_UNINIT) {
+ put_ext4(i_bitmap_blk * fs->blksz,
+ zero_buffer, fs->blksz);
+ bg_flags &= ~EXT4_BG_INODE_UNINIT;
+ ext4fs_bg_set_flags(bgd, bg_flags);
memcpy(fs->inode_bmaps[ibmap_idx], zero_buffer,
fs->blksz);
}
@@ -1052,25 +1168,19 @@ restart:
/* journal backup */
if (prev_inode_bitmap_index != ibmap_idx) {
- memset(journal_buffer, '\0', fs->blksz);
- status = ext4fs_devread((lbaint_t)
- bgd[ibmap_idx].inode_id
- * fs->sect_perblk,
+ status = ext4fs_devread(i_bitmap_blk * fs->sect_perblk,
0, fs->blksz, journal_buffer);
if (status == 0)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- bgd[ibmap_idx].inode_id))
+ le32_to_cpu(bgd->inode_id)))
goto fail;
prev_inode_bitmap_index = ibmap_idx;
}
- if (bgd[ibmap_idx].bg_itable_unused !=
- bgd[ibmap_idx].free_inodes)
- bgd[ibmap_idx].bg_itable_unused =
- bgd[ibmap_idx].free_inodes;
- bgd[ibmap_idx].free_inodes--;
- bgd[ibmap_idx].bg_itable_unused--;
- fs->sb->free_inodes--;
+ ext4fs_bg_free_inodes_dec(bgd, fs);
+ if (has_gdt_chksum)
+ bgd->bg_itable_unused = bgd->free_inodes;
+ ext4fs_sb_free_inodes_dec(fs->sb);
goto success;
}
@@ -1097,8 +1207,8 @@ static void alloc_single_indirect_block(struct ext2_inode *file_inode,
long int actual_block_no;
long int si_blockno;
/* si :single indirect */
- unsigned int *si_buffer = NULL;
- unsigned int *si_start_addr = NULL;
+ __le32 *si_buffer = NULL;
+ __le32 *si_start_addr = NULL;
struct ext_filesystem *fs = get_fs();
if (*total_remaining_blocks != 0) {
@@ -1128,7 +1238,7 @@ static void alloc_single_indirect_block(struct ext2_inode *file_inode,
printf("no block left to assign\n");
goto fail;
}
- *si_buffer = actual_block_no;
+ *si_buffer = cpu_to_le32(actual_block_no);
debug("SIAB %u: %u\n", *si_buffer,
*total_remaining_blocks);
@@ -1141,7 +1251,7 @@ static void alloc_single_indirect_block(struct ext2_inode *file_inode,
/* write the block to disk */
put_ext4(((uint64_t) ((uint64_t)si_blockno * (uint64_t)fs->blksz)),
si_start_addr, fs->blksz);
- file_inode->b.blocks.indir_block = si_blockno;
+ file_inode->b.blocks.indir_block = cpu_to_le32(si_blockno);
}
fail:
free(si_start_addr);
@@ -1158,10 +1268,10 @@ static void alloc_double_indirect_block(struct ext2_inode *file_inode,
/* di:double indirect */
long int di_blockno_parent;
long int di_blockno_child;
- unsigned int *di_parent_buffer = NULL;
- unsigned int *di_child_buff = NULL;
- unsigned int *di_block_start_addr = NULL;
- unsigned int *di_child_buff_start = NULL;
+ __le32 *di_parent_buffer = NULL;
+ __le32 *di_child_buff = NULL;
+ __le32 *di_block_start_addr = NULL;
+ __le32 *di_child_buff_start = NULL;
struct ext_filesystem *fs = get_fs();
if (*total_remaining_blocks != 0) {
@@ -1205,7 +1315,7 @@ static void alloc_double_indirect_block(struct ext2_inode *file_inode,
goto fail;
di_child_buff_start = di_child_buff;
- *di_parent_buffer = di_blockno_child;
+ *di_parent_buffer = cpu_to_le32(di_blockno_child);
di_parent_buffer++;
(*no_blks_reqd)++;
debug("DICB %ld: %u\n", di_blockno_child,
@@ -1228,7 +1338,7 @@ static void alloc_double_indirect_block(struct ext2_inode *file_inode,
printf("no block left to assign\n");
goto fail;
}
- *di_child_buff = actual_block_no;
+ *di_child_buff = cpu_to_le32(actual_block_no);
debug("DIAB %ld: %u\n", actual_block_no,
*total_remaining_blocks);
@@ -1248,7 +1358,7 @@ static void alloc_double_indirect_block(struct ext2_inode *file_inode,
}
put_ext4(((uint64_t) ((uint64_t)di_blockno_parent * (uint64_t)fs->blksz)),
di_block_start_addr, fs->blksz);
- file_inode->b.blocks.double_indir_block = di_blockno_parent;
+ file_inode->b.blocks.double_indir_block = cpu_to_le32(di_blockno_parent);
}
fail:
free(di_block_start_addr);
@@ -1266,12 +1376,12 @@ static void alloc_triple_indirect_block(struct ext2_inode *file_inode,
long int ti_gp_blockno;
long int ti_parent_blockno;
long int ti_child_blockno;
- unsigned int *ti_gp_buff = NULL;
- unsigned int *ti_parent_buff = NULL;
- unsigned int *ti_child_buff = NULL;
- unsigned int *ti_gp_buff_start_addr = NULL;
- unsigned int *ti_pbuff_start_addr = NULL;
- unsigned int *ti_cbuff_start_addr = NULL;
+ __le32 *ti_gp_buff = NULL;
+ __le32 *ti_parent_buff = NULL;
+ __le32 *ti_child_buff = NULL;
+ __le32 *ti_gp_buff_start_addr = NULL;
+ __le32 *ti_pbuff_start_addr = NULL;
+ __le32 *ti_cbuff_start_addr = NULL;
struct ext_filesystem *fs = get_fs();
if (*total_remaining_blocks != 0) {
/* triple indirect grand parent block connecting to inode */
@@ -1301,7 +1411,7 @@ static void alloc_triple_indirect_block(struct ext2_inode *file_inode,
goto fail;
ti_pbuff_start_addr = ti_parent_buff;
- *ti_gp_buff = ti_parent_blockno;
+ *ti_gp_buff = cpu_to_le32(ti_parent_blockno);
ti_gp_buff++;
(*no_blks_reqd)++;
debug("TIPB %ld: %u\n", ti_parent_blockno,
@@ -1319,7 +1429,7 @@ static void alloc_triple_indirect_block(struct ext2_inode *file_inode,
goto fail1;
ti_cbuff_start_addr = ti_child_buff;
- *ti_parent_buff = ti_child_blockno;
+ *ti_parent_buff = cpu_to_le32(ti_child_blockno);
ti_parent_buff++;
(*no_blks_reqd)++;
debug("TICB %ld: %u\n", ti_parent_blockno,
@@ -1335,7 +1445,7 @@ static void alloc_triple_indirect_block(struct ext2_inode *file_inode,
free(ti_cbuff_start_addr);
goto fail1;
}
- *ti_child_buff = actual_block_no;
+ *ti_child_buff = cpu_to_le32(actual_block_no);
debug("TIAB %ld: %u\n", actual_block_no,
*total_remaining_blocks);
@@ -1364,7 +1474,7 @@ static void alloc_triple_indirect_block(struct ext2_inode *file_inode,
/* write the grand parent block */
put_ext4(((uint64_t) ((uint64_t)ti_gp_blockno * (uint64_t)fs->blksz)),
ti_gp_buff_start_addr, fs->blksz);
- file_inode->b.blocks.triple_indir_block = ti_gp_blockno;
+ file_inode->b.blocks.triple_indir_block = cpu_to_le32(ti_gp_blockno);
free(ti_gp_buff_start_addr);
return;
}
@@ -1389,7 +1499,7 @@ void ext4fs_allocate_blocks(struct ext2_inode *file_inode,
printf("no block left to assign\n");
return;
}
- file_inode->b.blocks.dir_blocks[i] = direct_blockno;
+ file_inode->b.blocks.dir_blocks[i] = cpu_to_le32(direct_blockno);
debug("DB %ld: %u\n", direct_blockno, total_remaining_blocks);
total_remaining_blocks--;
@@ -1420,7 +1530,7 @@ static struct ext4_extent_header *ext4fs_get_extent_block
index = (struct ext4_extent_idx *)(ext_block + 1);
if (le16_to_cpu(ext_block->eh_magic) != EXT4_EXT_MAGIC)
- return 0;
+ return NULL;
if (ext_block->eh_depth == 0)
return ext_block;
@@ -1432,7 +1542,7 @@ static struct ext4_extent_header *ext4fs_get_extent_block
} while (fileblock >= le32_to_cpu(index[i].ei_block));
if (--i < 0)
- return 0;
+ return NULL;
block = le16_to_cpu(index[i].ei_leaf_hi);
block = (block << 32) + le32_to_cpu(index[i].ei_leaf_lo);
@@ -1441,7 +1551,7 @@ static struct ext4_extent_header *ext4fs_get_extent_block
buf))
ext_block = (struct ext4_extent_header *)buf;
else
- return 0;
+ return NULL;
}
}
@@ -1451,20 +1561,20 @@ static int ext4fs_blockgroup
long int blkno;
unsigned int blkoff, desc_per_blk;
int log2blksz = get_fs()->dev_desc->log2blksz;
+ int desc_size = get_fs()->gdsize;
- desc_per_blk = EXT2_BLOCK_SIZE(data) / sizeof(struct ext2_block_group);
+ desc_per_blk = EXT2_BLOCK_SIZE(data) / desc_size;
- blkno = __le32_to_cpu(data->sblock.first_data_block) + 1 +
+ blkno = le32_to_cpu(data->sblock.first_data_block) + 1 +
group / desc_per_blk;
- blkoff = (group % desc_per_blk) * sizeof(struct ext2_block_group);
+ blkoff = (group % desc_per_blk) * desc_size;
debug("ext4fs read %d group descriptor (blkno %ld blkoff %u)\n",
group, blkno, blkoff);
return ext4fs_devread((lbaint_t)blkno <<
(LOG2_BLOCK_SIZE(data) - log2blksz),
- blkoff, sizeof(struct ext2_block_group),
- (char *)blkgrp);
+ blkoff, desc_size, (char *)blkgrp);
}
int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode)
@@ -1479,14 +1589,14 @@ int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode)
/* It is easier to calculate if the first inode is 0. */
ino--;
- status = ext4fs_blockgroup(data, ino / __le32_to_cpu
+ status = ext4fs_blockgroup(data, ino / le32_to_cpu
(sblock->inodes_per_group), &blkgrp);
if (status == 0)
return 0;
inodes_per_block = EXT2_BLOCK_SIZE(data) / fs->inodesz;
- blkno = __le32_to_cpu(blkgrp.inode_table_id) +
- (ino % __le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block;
+ blkno = ext4fs_bg_get_inode_table_id(&blkgrp, fs) +
+ (ino % le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block;
blkoff = (ino % inodes_per_block) * fs->inodesz;
/* Read the inode. */
status = ext4fs_devread((lbaint_t)blkno << (LOG2_BLOCK_SIZE(data) -
@@ -1559,7 +1669,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
/* Direct blocks. */
if (fileblock < INDIRECT_BLOCKS)
- blknr = __le32_to_cpu(inode->b.blocks.dir_blocks[fileblock]);
+ blknr = le32_to_cpu(inode->b.blocks.dir_blocks[fileblock]);
/* Indirect. */
else if (fileblock < (INDIRECT_BLOCKS + (blksz / 4))) {
@@ -1586,23 +1696,23 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
}
ext4fs_indir1_size = blksz;
}
- if ((__le32_to_cpu(inode->b.blocks.indir_block) <<
+ if ((le32_to_cpu(inode->b.blocks.indir_block) <<
log2_blksz) != ext4fs_indir1_blkno) {
status =
- ext4fs_devread((lbaint_t)__le32_to_cpu
+ ext4fs_devread((lbaint_t)le32_to_cpu
(inode->b.blocks.
indir_block) << log2_blksz, 0,
blksz, (char *)ext4fs_indir1_block);
if (status == 0) {
printf("** SI ext2fs read block (indir 1)"
"failed. **\n");
- return 0;
+ return -1;
}
ext4fs_indir1_blkno =
- __le32_to_cpu(inode->b.blocks.
+ le32_to_cpu(inode->b.blocks.
indir_block) << log2_blksz;
}
- blknr = __le32_to_cpu(ext4fs_indir1_block
+ blknr = le32_to_cpu(ext4fs_indir1_block
[fileblock - INDIRECT_BLOCKS]);
}
/* Double indirect. */
@@ -1635,10 +1745,10 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
}
ext4fs_indir1_size = blksz;
}
- if ((__le32_to_cpu(inode->b.blocks.double_indir_block) <<
+ if ((le32_to_cpu(inode->b.blocks.double_indir_block) <<
log2_blksz) != ext4fs_indir1_blkno) {
status =
- ext4fs_devread((lbaint_t)__le32_to_cpu
+ ext4fs_devread((lbaint_t)le32_to_cpu
(inode->b.blocks.
double_indir_block) << log2_blksz,
0, blksz,
@@ -1649,7 +1759,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
return -1;
}
ext4fs_indir1_blkno =
- __le32_to_cpu(inode->b.blocks.double_indir_block) <<
+ le32_to_cpu(inode->b.blocks.double_indir_block) <<
log2_blksz;
}
@@ -1676,9 +1786,9 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
}
ext4fs_indir2_size = blksz;
}
- if ((__le32_to_cpu(ext4fs_indir1_block[rblock / perblock]) <<
+ if ((le32_to_cpu(ext4fs_indir1_block[rblock / perblock]) <<
log2_blksz) != ext4fs_indir2_blkno) {
- status = ext4fs_devread((lbaint_t)__le32_to_cpu
+ status = ext4fs_devread((lbaint_t)le32_to_cpu
(ext4fs_indir1_block
[rblock /
perblock]) << log2_blksz, 0,
@@ -1690,12 +1800,12 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
return -1;
}
ext4fs_indir2_blkno =
- __le32_to_cpu(ext4fs_indir1_block[rblock
+ le32_to_cpu(ext4fs_indir1_block[rblock
/
perblock]) <<
log2_blksz;
}
- blknr = __le32_to_cpu(ext4fs_indir2_block[rblock % perblock]);
+ blknr = le32_to_cpu(ext4fs_indir2_block[rblock % perblock]);
}
/* Tripple indirect. */
else {
@@ -1727,11 +1837,11 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
}
ext4fs_indir1_size = blksz;
}
- if ((__le32_to_cpu(inode->b.blocks.triple_indir_block) <<
+ if ((le32_to_cpu(inode->b.blocks.triple_indir_block) <<
log2_blksz) != ext4fs_indir1_blkno) {
status = ext4fs_devread
((lbaint_t)
- __le32_to_cpu(inode->b.blocks.triple_indir_block)
+ le32_to_cpu(inode->b.blocks.triple_indir_block)
<< log2_blksz, 0, blksz,
(char *)ext4fs_indir1_block);
if (status == 0) {
@@ -1740,7 +1850,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
return -1;
}
ext4fs_indir1_blkno =
- __le32_to_cpu(inode->b.blocks.triple_indir_block) <<
+ le32_to_cpu(inode->b.blocks.triple_indir_block) <<
log2_blksz;
}
@@ -1767,11 +1877,11 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
}
ext4fs_indir2_size = blksz;
}
- if ((__le32_to_cpu(ext4fs_indir1_block[rblock /
+ if ((le32_to_cpu(ext4fs_indir1_block[rblock /
perblock_parent]) <<
log2_blksz)
!= ext4fs_indir2_blkno) {
- status = ext4fs_devread((lbaint_t)__le32_to_cpu
+ status = ext4fs_devread((lbaint_t)le32_to_cpu
(ext4fs_indir1_block
[rblock /
perblock_parent]) <<
@@ -1783,7 +1893,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
return -1;
}
ext4fs_indir2_blkno =
- __le32_to_cpu(ext4fs_indir1_block[rblock /
+ le32_to_cpu(ext4fs_indir1_block[rblock /
perblock_parent])
<< log2_blksz;
}
@@ -1811,12 +1921,12 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
}
ext4fs_indir3_size = blksz;
}
- if ((__le32_to_cpu(ext4fs_indir2_block[rblock
+ if ((le32_to_cpu(ext4fs_indir2_block[rblock
/
perblock_child]) <<
log2_blksz) != ext4fs_indir3_blkno) {
status =
- ext4fs_devread((lbaint_t)__le32_to_cpu
+ ext4fs_devread((lbaint_t)le32_to_cpu
(ext4fs_indir2_block
[(rblock / perblock_child)
% (blksz / 4)]) << log2_blksz, 0,
@@ -1827,14 +1937,14 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
return -1;
}
ext4fs_indir3_blkno =
- __le32_to_cpu(ext4fs_indir2_block[(rblock /
+ le32_to_cpu(ext4fs_indir2_block[(rblock /
perblock_child) %
(blksz /
4)]) <<
log2_blksz;
}
- blknr = __le32_to_cpu(ext4fs_indir3_block
+ blknr = le32_to_cpu(ext4fs_indir3_block
[rblock % perblock_child]);
}
debug("read_allocated_block %ld\n", blknr);
@@ -1907,7 +2017,7 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
return 0;
}
/* Search the file. */
- while (fpos < __le32_to_cpu(diro->inode.size)) {
+ while (fpos < le32_to_cpu(diro->inode.size)) {
struct ext2_dirent dirent;
status = ext4fs_read_file(diro, fpos,
@@ -1939,7 +2049,7 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
return 0;
fdiro->data = diro->data;
- fdiro->ino = __le32_to_cpu(dirent.inode);
+ fdiro->ino = le32_to_cpu(dirent.inode);
filename[dirent.namelen] = '\0';
@@ -1954,7 +2064,7 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
type = FILETYPE_REG;
} else {
status = ext4fs_read_inode(diro->data,
- __le32_to_cpu
+ le32_to_cpu
(dirent.inode),
&fdiro->inode);
if (status == 0) {
@@ -1963,15 +2073,15 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
}
fdiro->inode_read = 1;
- if ((__le16_to_cpu(fdiro->inode.mode) &
+ if ((le16_to_cpu(fdiro->inode.mode) &
FILETYPE_INO_MASK) ==
FILETYPE_INO_DIRECTORY) {
type = FILETYPE_DIRECTORY;
- } else if ((__le16_to_cpu(fdiro->inode.mode)
+ } else if ((le16_to_cpu(fdiro->inode.mode)
& FILETYPE_INO_MASK) ==
FILETYPE_INO_SYMLINK) {
type = FILETYPE_SYMLINK;
- } else if ((__le16_to_cpu(fdiro->inode.mode)
+ } else if ((le16_to_cpu(fdiro->inode.mode)
& FILETYPE_INO_MASK) ==
FILETYPE_INO_REG) {
type = FILETYPE_REG;
@@ -1990,7 +2100,7 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
} else {
if (fdiro->inode_read == 0) {
status = ext4fs_read_inode(diro->data,
- __le32_to_cpu(
+ le32_to_cpu(
dirent.inode),
&fdiro->inode);
if (status == 0) {
@@ -2014,12 +2124,12 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
break;
}
printf("%10u %s\n",
- __le32_to_cpu(fdiro->inode.size),
+ le32_to_cpu(fdiro->inode.size),
filename);
}
free(fdiro);
}
- fpos += __le16_to_cpu(dirent.direntlen);
+ fpos += le16_to_cpu(dirent.direntlen);
}
return 0;
}
@@ -2034,25 +2144,25 @@ static char *ext4fs_read_symlink(struct ext2fs_node *node)
if (!diro->inode_read) {
status = ext4fs_read_inode(diro->data, diro->ino, &diro->inode);
if (status == 0)
- return 0;
+ return NULL;
}
- symlink = zalloc(__le32_to_cpu(diro->inode.size) + 1);
+ symlink = zalloc(le32_to_cpu(diro->inode.size) + 1);
if (!symlink)
- return 0;
+ return NULL;
- if (__le32_to_cpu(diro->inode.size) < sizeof(diro->inode.b.symlink)) {
+ if (le32_to_cpu(diro->inode.size) < sizeof(diro->inode.b.symlink)) {
strncpy(symlink, diro->inode.b.symlink,
- __le32_to_cpu(diro->inode.size));
+ le32_to_cpu(diro->inode.size));
} else {
status = ext4fs_read_file(diro, 0,
- __le32_to_cpu(diro->inode.size),
+ le32_to_cpu(diro->inode.size),
symlink, &actread);
if ((status < 0) || (actread == 0)) {
free(symlink);
- return 0;
+ return NULL;
}
}
- symlink[__le32_to_cpu(diro->inode.size)] = '\0';
+ symlink[le32_to_cpu(diro->inode.size)] = '\0';
return symlink;
}
@@ -2200,7 +2310,7 @@ int ext4fs_open(const char *filename, loff_t *len)
if (status == 0)
goto fail;
}
- *len = __le32_to_cpu(fdiro->inode.size);
+ *len = le32_to_cpu(fdiro->inode.size);
ext4fs_file = fdiro;
return 0;
@@ -2226,26 +2336,27 @@ int ext4fs_mount(unsigned part_length)
goto fail;
/* Make sure this is an ext2 filesystem. */
- if (__le16_to_cpu(data->sblock.magic) != EXT2_MAGIC)
+ if (le16_to_cpu(data->sblock.magic) != EXT2_MAGIC)
goto fail;
- /*
- * The 64bit feature was enabled when metadata_csum was enabled
- * and we do not support metadata_csum (and cannot reliably find
- * files when it is set. Refuse to mount.
- */
- if (data->sblock.feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT) {
- printf("Unsupported feature found (64bit, possibly metadata_csum), not mounting\n");
- goto fail;
- }
- if (__le32_to_cpu(data->sblock.revision_level == 0))
+ if (le32_to_cpu(data->sblock.revision_level) == 0) {
fs->inodesz = 128;
- else
- fs->inodesz = __le16_to_cpu(data->sblock.inode_size);
+ } else {
+ debug("EXT4 features COMPAT: %08x INCOMPAT: %08x RO_COMPAT: %08x\n",
+ __le32_to_cpu(data->sblock.feature_compatibility),
+ __le32_to_cpu(data->sblock.feature_incompat),
+ __le32_to_cpu(data->sblock.feature_ro_compat));
+
+ fs->inodesz = le16_to_cpu(data->sblock.inode_size);
+ fs->gdsize = le32_to_cpu(data->sblock.feature_incompat) &
+ EXT4_FEATURE_INCOMPAT_64BIT ?
+ le16_to_cpu(data->sblock.descriptor_size) : 32;
+ }
- debug("EXT2 rev %d, inode_size %d\n",
- __le32_to_cpu(data->sblock.revision_level), fs->inodesz);
+ debug("EXT2 rev %d, inode_size %d, descriptor size %d\n",
+ le32_to_cpu(data->sblock.revision_level),
+ fs->inodesz, fs->gdsize);
data->diropen.data = data;
data->diropen.ino = 2;
diff --git a/fs/ext4/ext4_common.h b/fs/ext4/ext4_common.h
index 48fd2ac51d..04d56028a0 100644
--- a/fs/ext4/ext4_common.h
+++ b/fs/ext4/ext4_common.h
@@ -24,7 +24,7 @@
#include <ext_common.h>
#include <ext4fs.h>
#include <malloc.h>
-#include <asm/errno.h>
+#include <linux/errno.h>
#if defined(CONFIG_EXT4_WRITE)
#include "ext4_journal.h"
#include "crc16.h"
@@ -59,10 +59,10 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
#if defined(CONFIG_EXT4_WRITE)
uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n);
-int ext4fs_checksum_update(unsigned int i);
+uint16_t ext4fs_checksum_update(unsigned int i);
int ext4fs_get_parent_inode_num(const char *dirname, char *dname, int flags);
-void ext4fs_update_parent_dentry(char *filename, int *p_ino, int file_type);
-long int ext4fs_get_new_blk_no(void);
+int ext4fs_update_parent_dentry(char *filename, int file_type);
+uint32_t ext4fs_get_new_blk_no(void);
int ext4fs_get_new_inode_no(void);
void ext4fs_reset_block_bmap(long int blockno, unsigned char *buffer,
int index);
@@ -74,5 +74,17 @@ void ext4fs_allocate_blocks(struct ext2_inode *file_inode,
unsigned int total_remaining_blocks,
unsigned int *total_no_of_block);
void put_ext4(uint64_t off, void *buf, uint32_t size);
+struct ext2_block_group *ext4fs_get_group_descriptor
+ (const struct ext_filesystem *fs, uint32_t bg_idx);
+uint64_t ext4fs_bg_get_block_id(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs);
+uint64_t ext4fs_bg_get_inode_id(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs);
+uint64_t ext4fs_bg_get_inode_table_id(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs);
+uint64_t ext4fs_sb_get_free_blocks(const struct ext2_sblock *sb);
+void ext4fs_sb_set_free_blocks(struct ext2_sblock *sb, uint64_t free_blocks);
+uint32_t ext4fs_bg_get_free_blocks(const struct ext2_block_group *bg,
+ const struct ext_filesystem *fs);
#endif
#endif
diff --git a/fs/ext4/ext4_journal.c b/fs/ext4/ext4_journal.c
index 3f613351a4..5a25be4c8a 100644
--- a/fs/ext4/ext4_journal.c
+++ b/fs/ext4/ext4_journal.c
@@ -151,7 +151,7 @@ int ext4fs_log_gdt(char *gd_table)
* journal_buffer -- Buffer containing meta data
* blknr -- Block number on disk of the meta data buffer
*/
-int ext4fs_log_journal(char *journal_buffer, long int blknr)
+int ext4fs_log_journal(char *journal_buffer, uint32_t blknr)
{
struct ext_filesystem *fs = get_fs();
short i;
@@ -183,14 +183,18 @@ int ext4fs_log_journal(char *journal_buffer, long int blknr)
* metadata_buffer -- Buffer containing meta data
* blknr -- Block number on disk of the meta data buffer
*/
-int ext4fs_put_metadata(char *metadata_buffer, long int blknr)
+int ext4fs_put_metadata(char *metadata_buffer, uint32_t blknr)
{
struct ext_filesystem *fs = get_fs();
if (!metadata_buffer) {
printf("Invalid input arguments %s\n", __func__);
return -EINVAL;
}
- dirty_block_ptr[gd_index]->buf = zalloc(fs->blksz);
+ if (dirty_block_ptr[gd_index]->buf)
+ assert(dirty_block_ptr[gd_index]->blknr == blknr);
+ else
+ dirty_block_ptr[gd_index]->buf = zalloc(fs->blksz);
+
if (!dirty_block_ptr[gd_index]->buf)
return -ENOMEM;
memcpy(dirty_block_ptr[gd_index]->buf, metadata_buffer, fs->blksz);
@@ -215,7 +219,7 @@ void print_revoke_blks(char *revk_blk)
printf("total bytes %d\n", max);
while (offset < max) {
- blocknr = be32_to_cpu(*((long int *)(revk_blk + offset)));
+ blocknr = be32_to_cpu(*((__be32 *)(revk_blk + offset)));
printf("revoke blknr is %ld\n", blocknr);
offset += 4;
}
@@ -302,7 +306,7 @@ int check_blknr_for_revoke(long int blknr, int sequence_no)
max = be32_to_cpu(header->r_count);
while (offset < max) {
- blocknr = be32_to_cpu(*((long int *)
+ blocknr = be32_to_cpu(*((__be32 *)
(revk_blk + offset)));
if (blocknr == blknr)
goto found;
@@ -420,7 +424,7 @@ int ext4fs_check_journal_state(int recovery_flag)
temp_buff);
jsb = (struct journal_superblock_t *) temp_buff;
- if (fs->sb->feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
+ if (le32_to_cpu(fs->sb->feature_incompat) & EXT3_FEATURE_INCOMPAT_RECOVER) {
if (recovery_flag == RECOVER)
printf("Recovery required\n");
} else {
@@ -517,11 +521,14 @@ int ext4fs_check_journal_state(int recovery_flag)
end:
if (recovery_flag == RECOVER) {
+ uint32_t new_feature_incompat;
jsb->s_start = cpu_to_be32(1);
jsb->s_sequence = cpu_to_be32(be32_to_cpu(jsb->s_sequence) + 1);
/* get the superblock */
ext4_read_superblock((char *)fs->sb);
- fs->sb->feature_incompat |= EXT3_FEATURE_INCOMPAT_RECOVER;
+ new_feature_incompat = le32_to_cpu(fs->sb->feature_incompat);
+ new_feature_incompat |= EXT3_FEATURE_INCOMPAT_RECOVER;
+ fs->sb->feature_incompat = cpu_to_le32(new_feature_incompat);
/* Update the super block */
put_ext4((uint64_t) (SUPERBLOCK_SIZE),
diff --git a/fs/ext4/ext4_journal.h b/fs/ext4/ext4_journal.h
index d926094bec..3d05ad5315 100644
--- a/fs/ext4/ext4_journal.h
+++ b/fs/ext4/ext4_journal.h
@@ -49,9 +49,9 @@ struct dirty_blocks {
/* Standard header for all descriptor blocks: */
struct journal_header_t {
- __u32 h_magic;
- __u32 h_blocktype;
- __u32 h_sequence;
+ __be32 h_magic;
+ __be32 h_blocktype;
+ __be32 h_sequence;
};
/* The journal superblock. All fields are in big-endian byte order. */
@@ -60,35 +60,35 @@ struct journal_superblock_t {
struct journal_header_t s_header;
/* Static information describing the journal */
- __u32 s_blocksize; /* journal device blocksize */
- __u32 s_maxlen; /* total blocks in journal file */
- __u32 s_first; /* first block of log information */
+ __be32 s_blocksize; /* journal device blocksize */
+ __be32 s_maxlen; /* total blocks in journal file */
+ __be32 s_first; /* first block of log information */
/* Dynamic information describing the current state of the log */
- __u32 s_sequence; /* first commit ID expected in log */
- __u32 s_start; /* blocknr of start of log */
+ __be32 s_sequence; /* first commit ID expected in log */
+ __be32 s_start; /* blocknr of start of log */
/* Error value, as set by journal_abort(). */
- __s32 s_errno;
+ __be32 s_errno;
/* Remaining fields are only valid in a version-2 superblock */
- __u32 s_feature_compat; /* compatible feature set */
- __u32 s_feature_incompat; /* incompatible feature set */
- __u32 s_feature_ro_compat; /* readonly-compatible feature set */
+ __be32 s_feature_compat; /* compatible feature set */
+ __be32 s_feature_incompat; /* incompatible feature set */
+ __be32 s_feature_ro_compat; /* readonly-compatible feature set */
/* 0x0030 */
__u8 s_uuid[16]; /* 128-bit uuid for journal */
/* 0x0040 */
- __u32 s_nr_users; /* Nr of filesystems sharing log */
+ __be32 s_nr_users; /* Nr of filesystems sharing log */
- __u32 s_dynsuper; /* Blocknr of dynamic superblock copy */
+ __be32 s_dynsuper; /* Blocknr of dynamic superblock copy */
/* 0x0048 */
- __u32 s_max_transaction; /* Limit of journal blocks per trans. */
- __u32 s_max_trans_data; /* Limit of data blocks per trans. */
+ __be32 s_max_transaction; /* Limit of journal blocks per trans. */
+ __be32 s_max_trans_data; /* Limit of data blocks per trans. */
/* 0x0050 */
- __u32 s_padding[44];
+ __be32 s_padding[44];
/* 0x0100 */
__u8 s_users[16 * 48]; /* ids of all fs'es sharing the log */
@@ -96,13 +96,13 @@ struct journal_superblock_t {
} ;
struct ext3_journal_block_tag {
- uint32_t block;
- uint32_t flags;
+ __be32 block;
+ __be32 flags;
};
struct journal_revoke_header_t {
struct journal_header_t r_header;
- int r_count; /* Count of bytes used in the block */
+ __be32 r_count; /* Count of bytes used in the block */
};
struct revoke_blk_list {
@@ -115,8 +115,8 @@ extern struct ext2_data *ext4fs_root;
int ext4fs_init_journal(void);
int ext4fs_log_gdt(char *gd_table);
int ext4fs_check_journal_state(int recovery_flag);
-int ext4fs_log_journal(char *journal_buffer, long int blknr);
-int ext4fs_put_metadata(char *metadata_buffer, long int blknr);
+int ext4fs_log_journal(char *journal_buffer, uint32_t blknr);
+int ext4fs_put_metadata(char *metadata_buffer, uint32_t blknr);
void ext4fs_update_journal(void);
void ext4fs_dump_metadata(void);
void ext4fs_push_revoke_blk(char *buffer);
diff --git a/fs/ext4/ext4_write.c b/fs/ext4/ext4_write.c
index e027916763..d710a86d59 100644
--- a/fs/ext4/ext4_write.c
+++ b/fs/ext4/ext4_write.c
@@ -28,26 +28,67 @@
#include <div64.h>
#include "ext4_common.h"
+static inline void ext4fs_sb_free_inodes_inc(struct ext2_sblock *sb)
+{
+ sb->free_inodes = cpu_to_le32(le32_to_cpu(sb->free_inodes) + 1);
+}
+
+static inline void ext4fs_sb_free_blocks_inc(struct ext2_sblock *sb)
+{
+ sb->free_blocks = cpu_to_le32(le32_to_cpu(sb->free_blocks) + 1);
+}
+
+static inline void ext4fs_bg_free_inodes_inc
+ (struct ext2_block_group *bg, const struct ext_filesystem *fs)
+{
+ uint32_t free_inodes = le16_to_cpu(bg->free_inodes);
+ if (fs->gdsize == 64)
+ free_inodes += le16_to_cpu(bg->free_inodes_high) << 16;
+ free_inodes++;
+
+ bg->free_inodes = cpu_to_le16(free_inodes & 0xffff);
+ if (fs->gdsize == 64)
+ bg->free_inodes_high = cpu_to_le16(free_inodes >> 16);
+}
+
+static inline void ext4fs_bg_free_blocks_inc
+ (struct ext2_block_group *bg, const struct ext_filesystem *fs)
+{
+ uint32_t free_blocks = le16_to_cpu(bg->free_blocks);
+ if (fs->gdsize == 64)
+ free_blocks += le16_to_cpu(bg->free_blocks_high) << 16;
+ free_blocks++;
+
+ bg->free_blocks = cpu_to_le16(free_blocks & 0xffff);
+ if (fs->gdsize == 64)
+ bg->free_blocks_high = cpu_to_le16(free_blocks >> 16);
+}
+
static void ext4fs_update(void)
{
short i;
ext4fs_update_journal();
struct ext_filesystem *fs = get_fs();
+ struct ext2_block_group *bgd = NULL;
/* update super block */
put_ext4((uint64_t)(SUPERBLOCK_SIZE),
(struct ext2_sblock *)fs->sb, (uint32_t)SUPERBLOCK_SIZE);
- /* update block groups */
+ /* update block bitmaps */
for (i = 0; i < fs->no_blkgrp; i++) {
- fs->bgd[i].bg_checksum = ext4fs_checksum_update(i);
- put_ext4((uint64_t)((uint64_t)fs->bgd[i].block_id * (uint64_t)fs->blksz),
+ bgd = ext4fs_get_group_descriptor(fs, i);
+ bgd->bg_checksum = cpu_to_le16(ext4fs_checksum_update(i));
+ uint64_t b_bitmap_blk = ext4fs_bg_get_block_id(bgd, fs);
+ put_ext4(b_bitmap_blk * fs->blksz,
fs->blk_bmaps[i], fs->blksz);
}
- /* update inode table groups */
+ /* update inode bitmaps */
for (i = 0; i < fs->no_blkgrp; i++) {
- put_ext4((uint64_t) ((uint64_t)fs->bgd[i].inode_id * (uint64_t)fs->blksz),
+ bgd = ext4fs_get_group_descriptor(fs, i);
+ uint64_t i_bitmap_blk = ext4fs_bg_get_inode_id(bgd, fs);
+ put_ext4(i_bitmap_blk * fs->blksz,
fs->inode_bmaps[i], fs->blksz);
}
@@ -65,15 +106,12 @@ static void ext4fs_update(void)
int ext4fs_get_bgdtable(void)
{
int status;
- int grp_desc_size;
struct ext_filesystem *fs = get_fs();
- grp_desc_size = sizeof(struct ext2_block_group);
- fs->no_blk_pergdt = (fs->no_blkgrp * grp_desc_size) / fs->blksz;
- if ((fs->no_blkgrp * grp_desc_size) % fs->blksz)
- fs->no_blk_pergdt++;
+ int gdsize_total = ROUND(fs->no_blkgrp * fs->gdsize, fs->blksz);
+ fs->no_blk_pergdt = gdsize_total / fs->blksz;
/* allocate memory for gdtable */
- fs->gdtable = zalloc(fs->blksz * fs->no_blk_pergdt);
+ fs->gdtable = zalloc(gdsize_total);
if (!fs->gdtable)
return -ENOMEM;
/* read the group descriptor table */
@@ -99,24 +137,22 @@ static void delete_single_indirect_block(struct ext2_inode *inode)
{
struct ext2_block_group *bgd = NULL;
static int prev_bg_bmap_idx = -1;
- long int blknr;
+ uint32_t blknr;
int remainder;
int bg_idx;
int status;
- unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
+ uint32_t blk_per_grp = le32_to_cpu(ext4fs_root->sblock.blocks_per_group);
struct ext_filesystem *fs = get_fs();
char *journal_buffer = zalloc(fs->blksz);
if (!journal_buffer) {
printf("No memory\n");
return;
}
- /* get block group descriptor table */
- bgd = (struct ext2_block_group *)fs->gdtable;
/* deleting the single indirect block associated with inode */
if (inode->b.blocks.indir_block != 0) {
- debug("SIPB releasing %u\n", inode->b.blocks.indir_block);
- blknr = inode->b.blocks.indir_block;
+ blknr = le32_to_cpu(inode->b.blocks.indir_block);
+ debug("SIPB releasing %u\n", blknr);
bg_idx = blknr / blk_per_grp;
if (fs->blksz == 1024) {
remainder = blknr % blk_per_grp;
@@ -124,18 +160,19 @@ static void delete_single_indirect_block(struct ext2_inode *inode)
bg_idx--;
}
ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx);
- bgd[bg_idx].free_blocks++;
- fs->sb->free_blocks++;
+ /* get block group descriptor table */
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
+ ext4fs_bg_free_blocks_inc(bgd, fs);
+ ext4fs_sb_free_blocks_inc(fs->sb);
/* journal backup */
if (prev_bg_bmap_idx != bg_idx) {
- status =
- ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
- fs->sect_perblk, 0, fs->blksz,
- journal_buffer);
+ uint64_t b_bitmap_blk = ext4fs_bg_get_block_id(bgd, fs);
+ status = ext4fs_devread(
+ b_bitmap_blk * fs->sect_perblk,
+ 0, fs->blksz, journal_buffer);
if (status == 0)
goto fail;
- if (ext4fs_log_journal
- (journal_buffer, bgd[bg_idx].block_id))
+ if (ext4fs_log_journal(journal_buffer, b_bitmap_blk))
goto fail;
prev_bg_bmap_idx = bg_idx;
}
@@ -149,12 +186,12 @@ static void delete_double_indirect_block(struct ext2_inode *inode)
int i;
short status;
static int prev_bg_bmap_idx = -1;
- long int blknr;
+ uint32_t blknr;
int remainder;
int bg_idx;
- unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
- unsigned int *di_buffer = NULL;
- unsigned int *DIB_start_addr = NULL;
+ uint32_t blk_per_grp = le32_to_cpu(ext4fs_root->sblock.blocks_per_group);
+ __le32 *di_buffer = NULL;
+ void *dib_start_addr = NULL;
struct ext2_block_group *bgd = NULL;
struct ext_filesystem *fs = get_fs();
char *journal_buffer = zalloc(fs->blksz);
@@ -162,8 +199,6 @@ static void delete_double_indirect_block(struct ext2_inode *inode)
printf("No memory\n");
return;
}
- /* get the block group descriptor table */
- bgd = (struct ext2_block_group *)fs->gdtable;
if (inode->b.blocks.double_indir_block != 0) {
di_buffer = zalloc(fs->blksz);
@@ -171,8 +206,8 @@ static void delete_double_indirect_block(struct ext2_inode *inode)
printf("No memory\n");
return;
}
- DIB_start_addr = (unsigned int *)di_buffer;
- blknr = inode->b.blocks.double_indir_block;
+ dib_start_addr = di_buffer;
+ blknr = le32_to_cpu(inode->b.blocks.double_indir_block);
status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
fs->blksz, (char *)di_buffer);
for (i = 0; i < fs->blksz / sizeof(int); i++) {
@@ -180,21 +215,24 @@ static void delete_double_indirect_block(struct ext2_inode *inode)
break;
debug("DICB releasing %u\n", *di_buffer);
- bg_idx = *di_buffer / blk_per_grp;
+ bg_idx = le32_to_cpu(*di_buffer) / blk_per_grp;
if (fs->blksz == 1024) {
- remainder = *di_buffer % blk_per_grp;
+ remainder = le32_to_cpu(*di_buffer) % blk_per_grp;
if (!remainder)
bg_idx--;
}
- ext4fs_reset_block_bmap(*di_buffer,
+ /* get block group descriptor table */
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
+ ext4fs_reset_block_bmap(le32_to_cpu(*di_buffer),
fs->blk_bmaps[bg_idx], bg_idx);
di_buffer++;
- bgd[bg_idx].free_blocks++;
- fs->sb->free_blocks++;
+ ext4fs_bg_free_blocks_inc(bgd, fs);
+ ext4fs_sb_free_blocks_inc(fs->sb);
/* journal backup */
if (prev_bg_bmap_idx != bg_idx) {
- status = ext4fs_devread((lbaint_t)
- bgd[bg_idx].block_id
+ uint64_t b_bitmap_blk =
+ ext4fs_bg_get_block_id(bgd, fs);
+ status = ext4fs_devread(b_bitmap_blk
* fs->sect_perblk, 0,
fs->blksz,
journal_buffer);
@@ -202,41 +240,41 @@ static void delete_double_indirect_block(struct ext2_inode *inode)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- bgd[bg_idx].block_id))
+ b_bitmap_blk))
goto fail;
prev_bg_bmap_idx = bg_idx;
}
}
/* removing the parent double indirect block */
- blknr = inode->b.blocks.double_indir_block;
+ blknr = le32_to_cpu(inode->b.blocks.double_indir_block);
bg_idx = blknr / blk_per_grp;
if (fs->blksz == 1024) {
remainder = blknr % blk_per_grp;
if (!remainder)
bg_idx--;
}
+ /* get block group descriptor table */
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx);
- bgd[bg_idx].free_blocks++;
- fs->sb->free_blocks++;
+ ext4fs_bg_free_blocks_inc(bgd, fs);
+ ext4fs_sb_free_blocks_inc(fs->sb);
/* journal backup */
if (prev_bg_bmap_idx != bg_idx) {
- memset(journal_buffer, '\0', fs->blksz);
- status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
- fs->sect_perblk, 0, fs->blksz,
- journal_buffer);
+ uint64_t b_bitmap_blk = ext4fs_bg_get_block_id(bgd, fs);
+ status = ext4fs_devread(b_bitmap_blk * fs->sect_perblk,
+ 0, fs->blksz, journal_buffer);
if (status == 0)
goto fail;
- if (ext4fs_log_journal(journal_buffer,
- bgd[bg_idx].block_id))
+ if (ext4fs_log_journal(journal_buffer, b_bitmap_blk))
goto fail;
prev_bg_bmap_idx = bg_idx;
}
- debug("DIPB releasing %ld\n", blknr);
+ debug("DIPB releasing %d\n", blknr);
}
fail:
- free(DIB_start_addr);
+ free(dib_start_addr);
free(journal_buffer);
}
@@ -245,14 +283,14 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
int i, j;
short status;
static int prev_bg_bmap_idx = -1;
- long int blknr;
+ uint32_t blknr;
int remainder;
int bg_idx;
- unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
- unsigned int *tigp_buffer = NULL;
- unsigned int *tib_start_addr = NULL;
- unsigned int *tip_buffer = NULL;
- unsigned int *tipb_start_addr = NULL;
+ uint32_t blk_per_grp = le32_to_cpu(ext4fs_root->sblock.blocks_per_group);
+ __le32 *tigp_buffer = NULL;
+ void *tib_start_addr = NULL;
+ __le32 *tip_buffer = NULL;
+ void *tipb_start_addr = NULL;
struct ext2_block_group *bgd = NULL;
struct ext_filesystem *fs = get_fs();
char *journal_buffer = zalloc(fs->blksz);
@@ -260,8 +298,6 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
printf("No memory\n");
return;
}
- /* get block group descriptor table */
- bgd = (struct ext2_block_group *)fs->gdtable;
if (inode->b.blocks.triple_indir_block != 0) {
tigp_buffer = zalloc(fs->blksz);
@@ -269,8 +305,8 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
printf("No memory\n");
return;
}
- tib_start_addr = (unsigned int *)tigp_buffer;
- blknr = inode->b.blocks.triple_indir_block;
+ tib_start_addr = tigp_buffer;
+ blknr = le32_to_cpu(inode->b.blocks.triple_indir_block);
status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
fs->blksz, (char *)tigp_buffer);
for (i = 0; i < fs->blksz / sizeof(int); i++) {
@@ -281,33 +317,36 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
tip_buffer = zalloc(fs->blksz);
if (!tip_buffer)
goto fail;
- tipb_start_addr = (unsigned int *)tip_buffer;
- status = ext4fs_devread((lbaint_t)(*tigp_buffer) *
+ tipb_start_addr = tip_buffer;
+ status = ext4fs_devread((lbaint_t)le32_to_cpu(*tigp_buffer) *
fs->sect_perblk, 0, fs->blksz,
(char *)tip_buffer);
for (j = 0; j < fs->blksz / sizeof(int); j++) {
- if (*tip_buffer == 0)
+ if (le32_to_cpu(*tip_buffer) == 0)
break;
- bg_idx = *tip_buffer / blk_per_grp;
+ bg_idx = le32_to_cpu(*tip_buffer) / blk_per_grp;
if (fs->blksz == 1024) {
- remainder = *tip_buffer % blk_per_grp;
+ remainder = le32_to_cpu(*tip_buffer) % blk_per_grp;
if (!remainder)
bg_idx--;
}
- ext4fs_reset_block_bmap(*tip_buffer,
+ ext4fs_reset_block_bmap(le32_to_cpu(*tip_buffer),
fs->blk_bmaps[bg_idx],
bg_idx);
tip_buffer++;
- bgd[bg_idx].free_blocks++;
- fs->sb->free_blocks++;
+ /* get block group descriptor table */
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
+ ext4fs_bg_free_blocks_inc(bgd, fs);
+ ext4fs_sb_free_blocks_inc(fs->sb);
/* journal backup */
if (prev_bg_bmap_idx != bg_idx) {
+ uint64_t b_bitmap_blk =
+ ext4fs_bg_get_block_id(bgd, fs);
status =
ext4fs_devread(
- (lbaint_t)
- bgd[bg_idx].block_id *
+ b_bitmap_blk *
fs->sect_perblk, 0,
fs->blksz,
journal_buffer);
@@ -315,8 +354,7 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- bgd[bg_idx].
- block_id))
+ b_bitmap_blk))
goto fail;
prev_bg_bmap_idx = bg_idx;
}
@@ -328,38 +366,41 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
* removing the grand parent blocks
* which is connected to inode
*/
- bg_idx = *tigp_buffer / blk_per_grp;
+ bg_idx = le32_to_cpu(*tigp_buffer) / blk_per_grp;
if (fs->blksz == 1024) {
- remainder = *tigp_buffer % blk_per_grp;
+ remainder = le32_to_cpu(*tigp_buffer) % blk_per_grp;
if (!remainder)
bg_idx--;
}
- ext4fs_reset_block_bmap(*tigp_buffer,
+ ext4fs_reset_block_bmap(le32_to_cpu(*tigp_buffer),
fs->blk_bmaps[bg_idx], bg_idx);
tigp_buffer++;
- bgd[bg_idx].free_blocks++;
- fs->sb->free_blocks++;
+ /* get block group descriptor table */
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
+ ext4fs_bg_free_blocks_inc(bgd, fs);
+ ext4fs_sb_free_blocks_inc(fs->sb);
/* journal backup */
if (prev_bg_bmap_idx != bg_idx) {
+ uint64_t b_bitmap_blk =
+ ext4fs_bg_get_block_id(bgd, fs);
memset(journal_buffer, '\0', fs->blksz);
- status =
- ext4fs_devread((lbaint_t)
- bgd[bg_idx].block_id *
- fs->sect_perblk, 0,
- fs->blksz, journal_buffer);
+ status = ext4fs_devread(b_bitmap_blk *
+ fs->sect_perblk, 0,
+ fs->blksz,
+ journal_buffer);
if (status == 0)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- bgd[bg_idx].block_id))
+ b_bitmap_blk))
goto fail;
prev_bg_bmap_idx = bg_idx;
}
}
/* removing the grand parent triple indirect block */
- blknr = inode->b.blocks.triple_indir_block;
+ blknr = le32_to_cpu(inode->b.blocks.triple_indir_block);
bg_idx = blknr / blk_per_grp;
if (fs->blksz == 1024) {
remainder = blknr % blk_per_grp;
@@ -367,23 +408,23 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
bg_idx--;
}
ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx);
- bgd[bg_idx].free_blocks++;
- fs->sb->free_blocks++;
+ /* get block group descriptor table */
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
+ ext4fs_bg_free_blocks_inc(bgd, fs);
+ ext4fs_sb_free_blocks_inc(fs->sb);
/* journal backup */
if (prev_bg_bmap_idx != bg_idx) {
- memset(journal_buffer, '\0', fs->blksz);
- status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
- fs->sect_perblk, 0, fs->blksz,
- journal_buffer);
+ uint64_t b_bitmap_blk = ext4fs_bg_get_block_id(bgd, fs);
+ status = ext4fs_devread(b_bitmap_blk * fs->sect_perblk,
+ 0, fs->blksz, journal_buffer);
if (status == 0)
goto fail;
- if (ext4fs_log_journal(journal_buffer,
- bgd[bg_idx].block_id))
+ if (ext4fs_log_journal(journal_buffer, b_bitmap_blk))
goto fail;
prev_bg_bmap_idx = bg_idx;
}
- debug("tigp buffer itself releasing %ld\n", blknr);
+ debug("tigp buffer itself releasing %d\n", blknr);
}
fail:
free(tib_start_addr);
@@ -402,126 +443,87 @@ static int ext4fs_delete_file(int inodeno)
int ibmap_idx;
char *read_buffer = NULL;
char *start_block_address = NULL;
- unsigned int no_blocks;
+ uint32_t no_blocks;
static int prev_bg_bmap_idx = -1;
unsigned int inodes_per_block;
- long int blkno;
+ uint32_t blkno;
unsigned int blkoff;
- unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
- unsigned int inode_per_grp = ext4fs_root->sblock.inodes_per_group;
+ uint32_t blk_per_grp = le32_to_cpu(ext4fs_root->sblock.blocks_per_group);
+ uint32_t inode_per_grp = le32_to_cpu(ext4fs_root->sblock.inodes_per_group);
struct ext2_inode *inode_buffer = NULL;
struct ext2_block_group *bgd = NULL;
struct ext_filesystem *fs = get_fs();
char *journal_buffer = zalloc(fs->blksz);
if (!journal_buffer)
return -ENOMEM;
- /* get the block group descriptor table */
- bgd = (struct ext2_block_group *)fs->gdtable;
status = ext4fs_read_inode(ext4fs_root, inodeno, &inode);
if (status == 0)
goto fail;
/* read the block no allocated to a file */
- no_blocks = inode.size / fs->blksz;
- if (inode.size % fs->blksz)
+ no_blocks = le32_to_cpu(inode.size) / fs->blksz;
+ if (le32_to_cpu(inode.size) % fs->blksz)
no_blocks++;
if (le32_to_cpu(inode.flags) & EXT4_EXTENTS_FL) {
- struct ext2fs_node *node_inode =
- zalloc(sizeof(struct ext2fs_node));
- if (!node_inode)
- goto fail;
- node_inode->data = ext4fs_root;
- node_inode->ino = inodeno;
- node_inode->inode_read = 0;
- memcpy(&(node_inode->inode), &inode, sizeof(struct ext2_inode));
-
- for (i = 0; i < no_blocks; i++) {
- blknr = read_allocated_block(&(node_inode->inode), i);
- bg_idx = blknr / blk_per_grp;
- if (fs->blksz == 1024) {
- remainder = blknr % blk_per_grp;
- if (!remainder)
- bg_idx--;
- }
- ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx],
- bg_idx);
- debug("EXT4_EXTENTS Block releasing %ld: %d\n",
- blknr, bg_idx);
-
- bgd[bg_idx].free_blocks++;
- fs->sb->free_blocks++;
-
- /* journal backup */
- if (prev_bg_bmap_idx != bg_idx) {
- status =
- ext4fs_devread((lbaint_t)
- bgd[bg_idx].block_id *
- fs->sect_perblk, 0,
- fs->blksz, journal_buffer);
- if (status == 0)
- goto fail;
- if (ext4fs_log_journal(journal_buffer,
- bgd[bg_idx].block_id))
- goto fail;
- prev_bg_bmap_idx = bg_idx;
- }
- }
- if (node_inode) {
- free(node_inode);
- node_inode = NULL;
- }
+ /* FIXME delete extent index blocks, i.e. eh_depth >= 1 */
+ struct ext4_extent_header *eh =
+ (struct ext4_extent_header *)
+ inode.b.blocks.dir_blocks;
+ debug("del: dep=%d entries=%d\n", eh->eh_depth, eh->eh_entries);
} else {
-
delete_single_indirect_block(&inode);
delete_double_indirect_block(&inode);
delete_triple_indirect_block(&inode);
+ }
- /* read the block no allocated to a file */
- no_blocks = inode.size / fs->blksz;
- if (inode.size % fs->blksz)
- no_blocks++;
- for (i = 0; i < no_blocks; i++) {
- blknr = read_allocated_block(&inode, i);
- bg_idx = blknr / blk_per_grp;
- if (fs->blksz == 1024) {
- remainder = blknr % blk_per_grp;
- if (!remainder)
- bg_idx--;
- }
- ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx],
- bg_idx);
- debug("ActualB releasing %ld: %d\n", blknr, bg_idx);
-
- bgd[bg_idx].free_blocks++;
- fs->sb->free_blocks++;
- /* journal backup */
- if (prev_bg_bmap_idx != bg_idx) {
- memset(journal_buffer, '\0', fs->blksz);
- status = ext4fs_devread((lbaint_t)
- bgd[bg_idx].block_id
- * fs->sect_perblk,
- 0, fs->blksz,
- journal_buffer);
- if (status == 0)
- goto fail;
- if (ext4fs_log_journal(journal_buffer,
- bgd[bg_idx].block_id))
- goto fail;
- prev_bg_bmap_idx = bg_idx;
- }
+ /* release data blocks */
+ for (i = 0; i < no_blocks; i++) {
+ blknr = read_allocated_block(&inode, i);
+ if (blknr == 0)
+ continue;
+ if (blknr < 0)
+ goto fail;
+ bg_idx = blknr / blk_per_grp;
+ if (fs->blksz == 1024) {
+ remainder = blknr % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+ ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx],
+ bg_idx);
+ debug("EXT4 Block releasing %ld: %d\n", blknr, bg_idx);
+
+ /* get block group descriptor table */
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
+ ext4fs_bg_free_blocks_inc(bgd, fs);
+ ext4fs_sb_free_blocks_inc(fs->sb);
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ uint64_t b_bitmap_blk = ext4fs_bg_get_block_id(bgd, fs);
+ status = ext4fs_devread(b_bitmap_blk * fs->sect_perblk,
+ 0, fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal(journal_buffer, b_bitmap_blk))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
}
}
+ /* release inode */
/* from the inode no to blockno */
inodes_per_block = fs->blksz / fs->inodesz;
ibmap_idx = inodeno / inode_per_grp;
/* get the block no */
inodeno--;
- blkno = __le32_to_cpu(bgd[ibmap_idx].inode_table_id) +
- (inodeno % __le32_to_cpu(inode_per_grp)) / inodes_per_block;
+ /* get block group descriptor table */
+ bgd = ext4fs_get_group_descriptor(fs, ibmap_idx);
+ blkno = ext4fs_bg_get_inode_table_id(bgd, fs) +
+ (inodeno % inode_per_grp) / inodes_per_block;
/* get the offset of the inode */
blkoff = ((inodeno) % inodes_per_block) * fs->inodesz;
@@ -541,7 +543,7 @@ static int ext4fs_delete_file(int inodeno)
read_buffer = read_buffer + blkoff;
inode_buffer = (struct ext2_inode *)read_buffer;
- memset(inode_buffer, '\0', sizeof(struct ext2_inode));
+ memset(inode_buffer, '\0', fs->inodesz);
/* write the inode to original position in inode table */
if (ext4fs_put_metadata(start_block_address, blkno))
@@ -550,15 +552,15 @@ static int ext4fs_delete_file(int inodeno)
/* update the respective inode bitmaps */
inodeno++;
ext4fs_reset_inode_bmap(inodeno, fs->inode_bmaps[ibmap_idx], ibmap_idx);
- bgd[ibmap_idx].free_inodes++;
- fs->sb->free_inodes++;
+ ext4fs_bg_free_inodes_inc(bgd, fs);
+ ext4fs_sb_free_inodes_inc(fs->sb);
/* journal backup */
memset(journal_buffer, '\0', fs->blksz);
- status = ext4fs_devread((lbaint_t)bgd[ibmap_idx].inode_id *
+ status = ext4fs_devread(ext4fs_bg_get_inode_id(bgd, fs) *
fs->sect_perblk, 0, fs->blksz, journal_buffer);
if (status == 0)
goto fail;
- if (ext4fs_log_journal(journal_buffer, bgd[ibmap_idx].inode_id))
+ if (ext4fs_log_journal(journal_buffer, ext4fs_bg_get_inode_id(bgd, fs)))
goto fail;
ext4fs_update();
@@ -585,12 +587,11 @@ int ext4fs_init(void)
{
short status;
int i;
- unsigned int real_free_blocks = 0;
+ uint32_t real_free_blocks = 0;
struct ext_filesystem *fs = get_fs();
/* populate fs */
fs->blksz = EXT2_BLOCK_SIZE(ext4fs_root);
- fs->inodesz = INODE_SIZE_FILESYSTEM(ext4fs_root);
fs->sect_perblk = fs->blksz >> fs->dev_desc->log2blksz;
/* get the superblock */
@@ -606,9 +607,9 @@ int ext4fs_init(void)
/* get total no of blockgroups */
fs->no_blkgrp = (uint32_t)ext4fs_div_roundup(
- (ext4fs_root->sblock.total_blocks -
- ext4fs_root->sblock.first_data_block),
- ext4fs_root->sblock.blocks_per_group);
+ le32_to_cpu(ext4fs_root->sblock.total_blocks)
+ - le32_to_cpu(ext4fs_root->sblock.first_data_block),
+ le32_to_cpu(ext4fs_root->sblock.blocks_per_group));
/* get the block group descriptor table */
fs->gdtable_blkno = ((EXT2_MIN_BLOCK_SIZE == fs->blksz) + 1);
@@ -616,7 +617,6 @@ int ext4fs_init(void)
printf("Error in getting the block group descriptor table\n");
goto fail;
}
- fs->bgd = (struct ext2_block_group *)fs->gdtable;
/* load all the available bitmap block of the partition */
fs->blk_bmaps = zalloc(fs->no_blkgrp * sizeof(char *));
@@ -629,8 +629,9 @@ int ext4fs_init(void)
}
for (i = 0; i < fs->no_blkgrp; i++) {
- status =
- ext4fs_devread((lbaint_t)fs->bgd[i].block_id *
+ struct ext2_block_group *bgd =
+ ext4fs_get_group_descriptor(fs, i);
+ status = ext4fs_devread(ext4fs_bg_get_block_id(bgd, fs) *
fs->sect_perblk, 0,
fs->blksz, (char *)fs->blk_bmaps[i]);
if (status == 0)
@@ -648,7 +649,9 @@ int ext4fs_init(void)
}
for (i = 0; i < fs->no_blkgrp; i++) {
- status = ext4fs_devread((lbaint_t)fs->bgd[i].inode_id *
+ struct ext2_block_group *bgd =
+ ext4fs_get_group_descriptor(fs, i);
+ status = ext4fs_devread(ext4fs_bg_get_inode_id(bgd, fs) *
fs->sect_perblk,
0, fs->blksz,
(char *)fs->inode_bmaps[i]);
@@ -662,10 +665,14 @@ int ext4fs_init(void)
* with the blockgroups freeblocks when improper
* reboot of a linux kernel
*/
- for (i = 0; i < fs->no_blkgrp; i++)
- real_free_blocks = real_free_blocks + fs->bgd[i].free_blocks;
- if (real_free_blocks != fs->sb->free_blocks)
- fs->sb->free_blocks = real_free_blocks;
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ struct ext2_block_group *bgd =
+ ext4fs_get_group_descriptor(fs, i);
+ real_free_blocks = real_free_blocks +
+ ext4fs_bg_get_free_blocks(bgd, fs);
+ }
+ if (real_free_blocks != ext4fs_sb_get_free_blocks(fs->sb))
+ ext4fs_sb_set_free_blocks(fs->sb, real_free_blocks);
return 0;
fail:
@@ -679,8 +686,9 @@ void ext4fs_deinit(void)
int i;
struct ext2_inode inode_journal;
struct journal_superblock_t *jsb;
- long int blknr;
+ uint32_t blknr;
struct ext_filesystem *fs = get_fs();
+ uint32_t new_feature_incompat;
/* free journal */
char *temp_buff = zalloc(fs->blksz);
@@ -692,7 +700,7 @@ void ext4fs_deinit(void)
ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
temp_buff);
jsb = (struct journal_superblock_t *)temp_buff;
- jsb->s_start = cpu_to_be32(0);
+ jsb->s_start = 0;
put_ext4((uint64_t) ((uint64_t)blknr * (uint64_t)fs->blksz),
(struct journal_superblock_t *)temp_buff, fs->blksz);
free(temp_buff);
@@ -701,7 +709,9 @@ void ext4fs_deinit(void)
/* get the superblock */
ext4_read_superblock((char *)fs->sb);
- fs->sb->feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER;
+ new_feature_incompat = le32_to_cpu(fs->sb->feature_incompat);
+ new_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER;
+ fs->sb->feature_incompat = cpu_to_le32(new_feature_incompat);
put_ext4((uint64_t)(SUPERBLOCK_SIZE),
(struct ext2_sblock *)fs->sb, (uint32_t)SUPERBLOCK_SIZE);
free(fs->sb);
@@ -728,7 +738,6 @@ void ext4fs_deinit(void)
free(fs->gdtable);
fs->gdtable = NULL;
- fs->bgd = NULL;
/*
* reinitiliazed the global inode and
* block bitmap first execution check variables
@@ -739,12 +748,16 @@ void ext4fs_deinit(void)
fs->curr_blkno = 0;
}
+/*
+ * Write data to filesystem blocks. Uses same optimization for
+ * contigous sectors as ext4fs_read_file
+ */
static int ext4fs_write_file(struct ext2_inode *file_inode,
int pos, unsigned int len, char *buf)
{
int i;
int blockcnt;
- unsigned int filesize = __le32_to_cpu(file_inode->size);
+ uint32_t filesize = le32_to_cpu(file_inode->size);
struct ext_filesystem *fs = get_fs();
int log2blksz = fs->dev_desc->log2blksz;
int log2_fs_blocksize = LOG2_BLOCK_SIZE(ext4fs_root) - log2blksz;
@@ -765,7 +778,7 @@ static int ext4fs_write_file(struct ext2_inode *file_inode,
int blockend = fs->blksz;
int skipfirst = 0;
blknr = read_allocated_block(file_inode, i);
- if (blknr < 0)
+ if (blknr <= 0)
return -1;
blknr = blknr << log2_fs_blocksize;
@@ -839,11 +852,12 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
struct ext2_sblock *sblock = &(ext4fs_root->sblock);
unsigned int inodes_per_block;
unsigned int ibmap_idx;
+ struct ext2_block_group *bgd = NULL;
struct ext_filesystem *fs = get_fs();
ALLOC_CACHE_ALIGN_BUFFER(char, filename, 256);
memset(filename, 0x00, 256);
- g_parent_inode = zalloc(sizeof(struct ext2_inode));
+ g_parent_inode = zalloc(fs->inodesz);
if (!g_parent_inode)
goto fail;
@@ -857,8 +871,13 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
goto fail;
if (ext4fs_iget(parent_inodeno, g_parent_inode))
goto fail;
+ /* do not mess up a directory using hash trees */
+ if (le32_to_cpu(g_parent_inode->flags) & EXT4_INDEX_FL) {
+ printf("hash tree directory\n");
+ goto fail;
+ }
/* check if the filename is already present in root */
- existing_file_inodeno = ext4fs_filename_check(filename);
+ existing_file_inodeno = ext4fs_filename_unlink(filename);
if (existing_file_inodeno != -1) {
ret = ext4fs_delete_file(existing_file_inodeno);
fs->first_pass_bbmap = 0;
@@ -878,39 +897,42 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
}
blocks_remaining = blks_reqd_for_file;
/* test for available space in partition */
- if (fs->sb->free_blocks < blks_reqd_for_file) {
+ if (le32_to_cpu(fs->sb->free_blocks) < blks_reqd_for_file) {
printf("Not enough space on partition !!!\n");
goto fail;
}
- ext4fs_update_parent_dentry(filename, &inodeno, FILETYPE_REG);
+ inodeno = ext4fs_update_parent_dentry(filename, FILETYPE_REG);
+ if (inodeno == -1)
+ goto fail;
/* prepare file inode */
inode_buffer = zalloc(fs->inodesz);
if (!inode_buffer)
goto fail;
file_inode = (struct ext2_inode *)inode_buffer;
- file_inode->mode = S_IFREG | S_IRWXU |
- S_IRGRP | S_IROTH | S_IXGRP | S_IXOTH;
+ file_inode->mode = cpu_to_le16(S_IFREG | S_IRWXU |
+ S_IRGRP | S_IROTH | S_IXGRP | S_IXOTH);
/* ToDo: Update correct time */
- file_inode->mtime = timestamp;
- file_inode->atime = timestamp;
- file_inode->ctime = timestamp;
- file_inode->nlinks = 1;
- file_inode->size = sizebytes;
+ file_inode->mtime = cpu_to_le32(timestamp);
+ file_inode->atime = cpu_to_le32(timestamp);
+ file_inode->ctime = cpu_to_le32(timestamp);
+ file_inode->nlinks = cpu_to_le16(1);
+ file_inode->size = cpu_to_le32(sizebytes);
/* Allocate data blocks */
ext4fs_allocate_blocks(file_inode, blocks_remaining,
&blks_reqd_for_file);
- file_inode->blockcnt = (blks_reqd_for_file * fs->blksz) >>
- fs->dev_desc->log2blksz;
+ file_inode->blockcnt = cpu_to_le32((blks_reqd_for_file * fs->blksz) >>
+ fs->dev_desc->log2blksz);
temp_ptr = zalloc(fs->blksz);
if (!temp_ptr)
goto fail;
- ibmap_idx = inodeno / ext4fs_root->sblock.inodes_per_group;
+ ibmap_idx = inodeno / le32_to_cpu(ext4fs_root->sblock.inodes_per_group);
inodeno--;
- itable_blkno = __le32_to_cpu(fs->bgd[ibmap_idx].inode_table_id) +
- (inodeno % __le32_to_cpu(sblock->inodes_per_group)) /
+ bgd = ext4fs_get_group_descriptor(fs, ibmap_idx);
+ itable_blkno = ext4fs_bg_get_inode_table_id(bgd, fs) +
+ (inodeno % le32_to_cpu(sblock->inodes_per_group)) /
inodes_per_block;
blkoff = (inodeno % inodes_per_block) * fs->inodesz;
ext4fs_devread((lbaint_t)itable_blkno * fs->sect_perblk, 0, fs->blksz,
@@ -924,13 +946,15 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
/* copy the file content into data blocks */
if (ext4fs_write_file(file_inode, 0, sizebytes, (char *)buffer) == -1) {
printf("Error in copying content\n");
+ /* FIXME: Deallocate data blocks */
goto fail;
}
- ibmap_idx = parent_inodeno / ext4fs_root->sblock.inodes_per_group;
+ ibmap_idx = parent_inodeno / le32_to_cpu(ext4fs_root->sblock.inodes_per_group);
parent_inodeno--;
- parent_itable_blkno = __le32_to_cpu(fs->bgd[ibmap_idx].inode_table_id) +
+ bgd = ext4fs_get_group_descriptor(fs, ibmap_idx);
+ parent_itable_blkno = ext4fs_bg_get_inode_table_id(bgd, fs) +
(parent_inodeno %
- __le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block;
+ le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block;
blkoff = (parent_inodeno % inodes_per_block) * fs->inodesz;
if (parent_itable_blkno != itable_blkno) {
memset(temp_ptr, '\0', fs->blksz);
@@ -939,22 +963,18 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
if (ext4fs_log_journal(temp_ptr, parent_itable_blkno))
goto fail;
- memcpy(temp_ptr + blkoff, g_parent_inode,
- sizeof(struct ext2_inode));
+ memcpy(temp_ptr + blkoff, g_parent_inode, fs->inodesz);
if (ext4fs_put_metadata(temp_ptr, parent_itable_blkno))
goto fail;
- free(temp_ptr);
} else {
/*
* If parent and child fall in same inode table block
* both should be kept in 1 buffer
*/
- memcpy(temp_ptr + blkoff, g_parent_inode,
- sizeof(struct ext2_inode));
+ memcpy(temp_ptr + blkoff, g_parent_inode, fs->inodesz);
gd_index--;
if (ext4fs_put_metadata(temp_ptr, itable_blkno))
goto fail;
- free(temp_ptr);
}
ext4fs_update();
ext4fs_deinit();
@@ -965,6 +985,7 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
fs->curr_inode_no = 0;
free(inode_buffer);
free(g_parent_inode);
+ free(temp_ptr);
g_parent_inode = NULL;
return 0;
@@ -972,6 +993,7 @@ fail:
ext4fs_deinit();
free(inode_buffer);
free(g_parent_inode);
+ free(temp_ptr);
g_parent_inode = NULL;
return -1;
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index 43c8897793..3078737770 100644
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -55,7 +55,7 @@ int ext4fs_read_file(struct ext2fs_node *node, loff_t pos,
int log2blksz = fs->dev_desc->log2blksz;
int log2_fs_blocksize = LOG2_BLOCK_SIZE(node->data) - log2blksz;
int blocksize = (1 << (log2_fs_blocksize + log2blksz));
- unsigned int filesize = __le32_to_cpu(node->inode.size);
+ unsigned int filesize = le32_to_cpu(node->inode.size);
lbaint_t previous_block_number = -1;
lbaint_t delayed_start = 0;
lbaint_t delayed_extent = 0;
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