/*
* This fuction deallocates an inode
*/
static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
{
ext2_filsys fs = ctx->fs;
struct ext2_inode inode;
struct problem_context pctx;
__u32 count;
struct del_block del_block;
e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
clear_problem_context(&pctx);
pctx.ino = ino;
/*
* Fix up the bitmaps...
*/
e2fsck_read_bitmaps(ctx);
ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));
if (ext2fs_file_acl_block(fs, &inode) &&
(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
pctx.errcode = ext2fs_adjust_ea_refcount3(fs,
ext2fs_file_acl_block(fs, &inode),
block_buf, -1, &count, ino);
if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
pctx.errcode = 0;
count = 1;
}
if (pctx.errcode) {
pctx.blk = ext2fs_file_acl_block(fs, &inode);
fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
ctx->flags |= E2F_FLAG_ABORT;
return;
}
if (count == 0) {
ext2fs_unmark_block_bitmap2(ctx->block_found_map,
ext2fs_file_acl_block(fs, &inode));
ext2fs_block_alloc_stats2(fs,
ext2fs_file_acl_block(fs, &inode), -1);
}
ext2fs_file_acl_block_set(fs, &inode, 0);
}
if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
return;
if (LINUX_S_ISREG(inode.i_mode) && EXT2_I_SIZE(&inode) >= 0x80000000UL)
ctx->large_files--;
del_block.ctx = ctx;
del_block.num = 0;
pctx.errcode = ext2fs_block_iterate3(fs, ino, 0, block_buf,
deallocate_inode_block,
&del_block);
if (pctx.errcode) {
fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
ctx->flags |= E2F_FLAG_ABORT;
return;
}
}
/*
* This routine is called when an inode is not connected to the
* directory tree.
*
* This subroutine returns 1 then the caller shouldn't bother with the
* rest of the pass 4 tests.
*/
static int disconnect_inode(e2fsck_t ctx, ext2_ino_t i,
struct ext2_inode *inode)
{
ext2_filsys fs = ctx->fs;
struct problem_context pctx;
__u32 eamagic = 0;
int extra_size = 0;
if (EXT2_INODE_SIZE(fs->super) > EXT2_GOOD_OLD_INODE_SIZE) {
e2fsck_read_inode_full(ctx, i, inode,EXT2_INODE_SIZE(fs->super),
"pass4: disconnect_inode");
extra_size = ((struct ext2_inode_large *)inode)->i_extra_isize;
} else {
e2fsck_read_inode(ctx, i, inode, "pass4: disconnect_inode");
}
clear_problem_context(&pctx);
pctx.ino = i;
pctx.inode = inode;
if (EXT2_INODE_SIZE(fs->super) -EXT2_GOOD_OLD_INODE_SIZE -extra_size >0)
eamagic = *(__u32 *)(((char *)inode) +EXT2_GOOD_OLD_INODE_SIZE +
extra_size);
/*
* Offer to delete any zero-length files that does not have
* blocks. If there is an EA block, it might have useful
* information, so we won't prompt to delete it, but let it be
* reconnected to lost+found.
*/
if (!inode->i_blocks && eamagic != EXT2_EXT_ATTR_MAGIC &&
(LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode))) {
if (fix_problem(ctx, PR_4_ZERO_LEN_INODE, &pctx)) {
e2fsck_clear_inode(ctx, i, inode, 0,
"disconnect_inode");
/*
* Fix up the bitmaps...
*/
e2fsck_read_bitmaps(ctx);
ext2fs_inode_alloc_stats2(fs, i, -1,
LINUX_S_ISDIR(inode->i_mode));
return 0;
}
}
/*
* Prompt to reconnect.
*/
if (fix_problem(ctx, PR_4_UNATTACHED_INODE, &pctx)) {
if (e2fsck_reconnect_file(ctx, i))
ext2fs_unmark_valid(fs);
} else {
/*
* If we don't attach the inode, then skip the
* i_links_test since there's no point in trying to
* force i_links_count to zero.
*/
ext2fs_unmark_valid(fs);
return 1;
}
return 0;
}
static errcode_t mk_hugefile(ext2_filsys fs, blk64_t num,
ext2_ino_t dir, unsigned long idx, ext2_ino_t *ino)
{
errcode_t retval;
struct ext2_inode inode;
retval = ext2fs_new_inode(fs, 0, LINUX_S_IFREG, NULL, ino);
if (retval)
return retval;
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFREG | (0666 & ~fs->umask);
inode.i_links_count = 1;
inode.i_uid = uid & 0xFFFF;
ext2fs_set_i_uid_high(inode, (uid >> 16) & 0xffff);
inode.i_gid = gid & 0xFFFF;
ext2fs_set_i_gid_high(inode, (gid >> 16) & 0xffff);
retval = ext2fs_write_new_inode(fs, *ino, &inode);
if (retval)
return retval;
ext2fs_inode_alloc_stats2(fs, *ino, +1, 0);
if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
EXT3_FEATURE_INCOMPAT_EXTENTS))
inode.i_flags |= EXT4_EXTENTS_FL;
retval = ext2fs_fallocate(fs,
EXT2_FALLOCATE_FORCE_INIT |
EXT2_FALLOCATE_ZERO_BLOCKS,
*ino, &inode, goal, 0, num);
if (retval)
return retval;
retval = ext2fs_inode_size_set(fs, &inode, num * fs->blocksize);
if (retval)
return retval;
retval = ext2fs_write_inode(fs, *ino, &inode);
if (retval)
goto errout;
if (idx_digits)
sprintf(fn_numbuf, "%0*lu", idx_digits, idx);
else if (num_files > 1)
sprintf(fn_numbuf, "%lu", idx);
retry:
retval = ext2fs_link(fs, dir, fn_buf, *ino, EXT2_FT_REG_FILE);
if (retval == EXT2_ET_DIR_NO_SPACE) {
retval = ext2fs_expand_dir(fs, dir);
if (retval)
goto errout;
goto retry;
}
errout:
return retval;
}
/*
* This routine is called when an inode is not connected to the
* directory tree.
*
* This subroutine returns 1 then the caller shouldn't bother with the
* rest of the pass 4 tests.
*/
static int disconnect_inode(e2fsck_t ctx, ext2_ino_t i)
{
ext2_filsys fs = ctx->fs;
struct ext2_inode inode;
struct problem_context pctx;
e2fsck_read_inode(ctx, i, &inode, "pass4: disconnect_inode");
clear_problem_context(&pctx);
pctx.ino = i;
pctx.inode = &inode;
/*
* Offer to delete any zero-length files that does not have
* blocks. If there is an EA block, it might have useful
* information, so we won't prompt to delete it, but let it be
* reconnected to lost+found.
*/
if (!inode.i_blocks && (LINUX_S_ISREG(inode.i_mode) ||
LINUX_S_ISDIR(inode.i_mode))) {
if (fix_problem(ctx, PR_4_ZERO_LEN_INODE, &pctx)) {
ext2fs_icount_store(ctx->inode_link_info, i, 0);
inode.i_links_count = 0;
inode.i_dtime = ctx->now;
e2fsck_write_inode(ctx, i, &inode,
"disconnect_inode");
/*
* Fix up the bitmaps...
*/
e2fsck_read_bitmaps(ctx);
ext2fs_unmark_inode_bitmap(ctx->inode_used_map, i);
ext2fs_unmark_inode_bitmap(ctx->inode_dir_map, i);
ext2fs_inode_alloc_stats2(fs, i, -1,
LINUX_S_ISDIR(inode.i_mode));
return 0;
}
}
/*
* Prompt to reconnect.
*/
if (fix_problem(ctx, PR_4_UNATTACHED_INODE, &pctx)) {
if (e2fsck_reconnect_file(ctx, i))
ext2fs_unmark_valid(fs);
} else {
/*
* If we don't attach the inode, then skip the
* i_links_test since there's no point in trying to
* force i_links_count to zero.
*/
ext2fs_unmark_valid(fs);
return 1;
}
return 0;
}
static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
{
ext2_filsys fs = ctx->fs;
struct ext2_inode inode;
struct problem_context pctx;
__u32 count;
e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
clear_problem_context(&pctx);
pctx.ino = ino;
e2fsck_read_bitmaps(ctx);
ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));
if (inode.i_file_acl &&
(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
pctx.errcode = ext2fs_adjust_ea_refcount(fs, inode.i_file_acl,
block_buf, -1, &count);
if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
pctx.errcode = 0;
count = 1;
}
if (pctx.errcode) {
pctx.blk = inode.i_file_acl;
fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
ctx->flags |= E2F_FLAG_ABORT;
return;
}
if (count == 0) {
ext2fs_unmark_block_bitmap(ctx->block_found_map,
inode.i_file_acl);
ext2fs_block_alloc_stats(fs, inode.i_file_acl, -1);
}
inode.i_file_acl = 0;
}
if (!ext2fs_inode_has_valid_blocks(&inode))
return;
if (LINUX_S_ISREG(inode.i_mode) &&
(inode.i_size_high || inode.i_size & 0x80000000UL))
ctx->large_files--;
pctx.errcode = ext2fs_block_iterate2(fs, ino, 0, block_buf,
deallocate_inode_block, ctx);
if (pctx.errcode) {
fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
ctx->flags |= E2F_FLAG_ABORT;
return;
}
}
static ext2_ino_t ext2CreateFile(ext2_vd *vd, ext2_inode_t * parent, int type, const char * name)
{
errcode_t retval = -1;
ext2_ino_t newfile = 0;
ext2_ino_t existing;
if(ext2fs_namei_follow(vd->fs, vd->root, parent->ino, name, &existing) == 0) {
errno = EEXIST;
return 0;
}
retval = ext2fs_new_inode(vd->fs, parent->ino, type, 0, &newfile);
if (retval) {
errno = EFAULT;
return 0;
}
while((retval = ext2fs_link(vd->fs, parent->ino, name, newfile, EXT2_FT_REG_FILE)) == EXT2_ET_DIR_NO_SPACE)
{
if (ext2fs_expand_dir(vd->fs, parent->ino) != EXT2_ET_OK) {
errno = EMLINK;
return 0;
}
}
if (retval != EXT2_ET_OK) {
errno = EMLINK;
return 0;
}
ext2fs_inode_alloc_stats2(vd->fs, newfile, +1, 0);
struct ext2_inode inode;
memset(&inode, 0, sizeof(inode));
inode.i_mode = type;
inode.i_atime = inode.i_ctime = inode.i_mtime = time(0);
inode.i_links_count = 1;
inode.i_size = 0;
inode.i_uid = parent->ni.i_uid;
inode.i_gid = parent->ni.i_gid;
if (ext2fs_write_new_inode(vd->fs, newfile, &inode) != 0)
return 0;
return newfile;
}
errcode_t quota_remove_inode(ext2_filsys fs, enum quota_type qtype)
{
ext2_ino_t qf_ino;
errcode_t retval;
retval = ext2fs_read_bitmaps(fs);
if (retval) {
log_debug("Couldn't read bitmaps: %s", error_message(retval));
return retval;
}
qf_ino = *quota_sb_inump(fs->super, qtype);
if (qf_ino == 0)
return 0;
retval = quota_inode_truncate(fs, qf_ino);
if (retval)
return retval;
if (qf_ino >= EXT2_FIRST_INODE(fs->super)) {
struct ext2_inode inode;
retval = ext2fs_read_inode(fs, qf_ino, &inode);
if (!retval) {
memset(&inode, 0, sizeof(struct ext2_inode));
ext2fs_write_inode(fs, qf_ino, &inode);
}
ext2fs_inode_alloc_stats2(fs, qf_ino, -1, 0);
ext2fs_mark_ib_dirty(fs);
}
quota_set_sb_inum(fs, 0, qtype);
ext2fs_mark_super_dirty(fs);
fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
retval = ext2fs_write_bitmaps(fs);
if (retval) {
log_debug("Couldn't write bitmaps: %s", error_message(retval));
return retval;
}
return 0;
}
/*
* This routine gets the lost_and_found inode, making it a directory
* if necessary
*/
ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix)
{
ext2_filsys fs = ctx->fs;
ext2_ino_t ino;
blk64_t blk;
errcode_t retval;
struct ext2_inode inode;
char * block;
static const char name[] = "lost+found";
struct problem_context pctx;
if (ctx->lost_and_found)
return ctx->lost_and_found;
clear_problem_context(&pctx);
retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name,
sizeof(name)-1, 0, &ino);
if (retval && !fix)
return 0;
if (!retval) {
if (ext2fs_check_directory(fs, ino) == 0) {
ctx->lost_and_found = ino;
return ino;
}
/* Lost+found isn't a directory! */
if (!fix)
return 0;
pctx.ino = ino;
if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx))
return 0;
/* OK, unlink the old /lost+found file. */
pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0);
if (pctx.errcode) {
pctx.str = "ext2fs_unlink";
fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
return 0;
}
(void) e2fsck_dir_info_set_parent(ctx, ino, 0);
e2fsck_adjust_inode_count(ctx, ino, -1);
} else if (retval != EXT2_ET_FILE_NOT_FOUND) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx);
}
if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0))
return 0;
/*
* Read the inode and block bitmaps in; we'll be messing with
* them.
*/
e2fsck_read_bitmaps(ctx);
/*
* First, find a free block
*/
retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
if (retval) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx);
return 0;
}
ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
ext2fs_block_alloc_stats2(fs, blk, +1);
/*
* Next find a free inode.
*/
retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700,
ctx->inode_used_map, &ino);
if (retval) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx);
return 0;
}
ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
/*
* Now let's create the actual data block for the inode
*/
retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block);
if (retval) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx);
return 0;
}
retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
ext2fs_free_mem(&block);
if (retval) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx);
return 0;
}
/*
* Set up the inode structure
*/
memset(&inode, 0, sizeof(inode));
inode.i_mode = 040700;
inode.i_size = fs->blocksize;
inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now;
inode.i_links_count = 2;
ext2fs_iblk_set(fs, &inode, 1);
inode.i_block[0] = blk;
/*
* Next, write out the inode.
*/
pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode);
if (pctx.errcode) {
pctx.str = "ext2fs_write_inode";
fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
return 0;
}
/*
* Finally, create the directory link
*/
pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR);
if (pctx.errcode) {
pctx.str = "ext2fs_link";
fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
return 0;
}
/*
* Miscellaneous bookkeeping that needs to be kept straight.
*/
e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO);
e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1);
ext2fs_icount_store(ctx->inode_count, ino, 2);
ext2fs_icount_store(ctx->inode_link_info, ino, 2);
ctx->lost_and_found = ino;
quota_data_add(ctx->qctx, &inode, ino, fs->blocksize);
quota_data_inodes(ctx->qctx, &inode, ino, +1);
#if 0
printf("/lost+found created; inode #%lu\n", ino);
#endif
return ino;
}
/* Copy the native file to the fs */
errcode_t do_write_internal(ext2_filsys fs, ext2_ino_t cwd, const char *src,
const char *dest, ext2_ino_t root)
{
int fd;
struct stat statbuf;
ext2_ino_t newfile;
errcode_t retval;
struct ext2_inode inode;
int bufsize = IO_BUFSIZE;
int make_holes = 0;
fd = ext2fs_open_file(src, O_RDONLY, 0);
if (fd < 0) {
com_err(src, errno, 0);
return errno;
}
if (fstat(fd, &statbuf) < 0) {
com_err(src, errno, 0);
close(fd);
return errno;
}
retval = ext2fs_namei(fs, root, cwd, dest, &newfile);
if (retval == 0) {
close(fd);
return EXT2_ET_FILE_EXISTS;
}
retval = ext2fs_new_inode(fs, cwd, 010755, 0, &newfile);
if (retval) {
com_err(__func__, retval, 0);
close(fd);
return retval;
}
#ifdef DEBUGFS
printf("Allocated inode: %u\n", newfile);
#endif
retval = ext2fs_link(fs, cwd, dest, newfile,
EXT2_FT_REG_FILE);
if (retval == EXT2_ET_DIR_NO_SPACE) {
retval = ext2fs_expand_dir(fs, cwd);
if (retval) {
com_err(__func__, retval, "while expanding directory");
close(fd);
return retval;
}
retval = ext2fs_link(fs, cwd, dest, newfile,
EXT2_FT_REG_FILE);
}
if (retval) {
com_err(dest, retval, 0);
close(fd);
return errno;
}
if (ext2fs_test_inode_bitmap2(fs->inode_map, newfile))
com_err(__func__, 0, "Warning: inode already set");
ext2fs_inode_alloc_stats2(fs, newfile, +1, 0);
memset(&inode, 0, sizeof(inode));
inode.i_mode = (statbuf.st_mode & ~LINUX_S_IFMT) | LINUX_S_IFREG;
inode.i_atime = inode.i_ctime = inode.i_mtime =
fs->now ? fs->now : time(0);
inode.i_links_count = 1;
retval = ext2fs_inode_size_set(fs, &inode, statbuf.st_size);
if (retval) {
com_err(dest, retval, 0);
close(fd);
return retval;
}
if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
EXT4_FEATURE_INCOMPAT_INLINE_DATA)) {
inode.i_flags |= EXT4_INLINE_DATA_FL;
} else if (fs->super->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_EXTENTS) {
int i;
struct ext3_extent_header *eh;
eh = (struct ext3_extent_header *) &inode.i_block[0];
eh->eh_depth = 0;
eh->eh_entries = 0;
eh->eh_magic = ext2fs_cpu_to_le16(EXT3_EXT_MAGIC);
i = (sizeof(inode.i_block) - sizeof(*eh)) /
sizeof(struct ext3_extent);
eh->eh_max = ext2fs_cpu_to_le16(i);
inode.i_flags |= EXT4_EXTENTS_FL;
}
retval = ext2fs_write_new_inode(fs, newfile, &inode);
if (retval) {
com_err(__func__, retval, "while creating inode %u", newfile);
close(fd);
return retval;
}
if (inode.i_flags & EXT4_INLINE_DATA_FL) {
retval = ext2fs_inline_data_init(fs, newfile);
if (retval) {
com_err("copy_file", retval, 0);
close(fd);
return retval;
}
}
if (LINUX_S_ISREG(inode.i_mode)) {
if (statbuf.st_blocks < statbuf.st_size / S_BLKSIZE) {
make_holes = 1;
/*
* Use I/O blocksize as buffer size when
* copying sparse files.
*/
bufsize = statbuf.st_blksize;
}
retval = copy_file(fs, fd, newfile, bufsize, make_holes);
if (retval)
com_err("copy_file", retval, 0);
}
close(fd);
return retval;
}
errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino,
const char *name, char *target)
{
ext2_extent_handle_t handle;
errcode_t retval;
struct ext2_inode inode;
ext2_ino_t scratch_ino;
blk64_t blk;
int fastlink;
unsigned int target_len;
char *block_buf = 0;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/* The Linux kernel doesn't allow for links longer than a block */
target_len = strlen(target);
if (target_len > fs->blocksize) {
retval = EXT2_ET_INVALID_ARGUMENT;
goto cleanup;
}
/*
* Allocate a data block for slow links
*/
fastlink = (target_len < sizeof(inode.i_block));
if (!fastlink) {
retval = ext2fs_new_block2(fs, 0, 0, &blk);
if (retval)
goto cleanup;
retval = ext2fs_get_mem(fs->blocksize, &block_buf);
if (retval)
goto cleanup;
}
/*
* Allocate an inode, if necessary
*/
if (!ino) {
retval = ext2fs_new_inode(fs, parent, LINUX_S_IFLNK | 0755,
0, &ino);
if (retval)
goto cleanup;
}
/*
* Create the inode structure....
*/
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFLNK | 0777;
inode.i_uid = inode.i_gid = 0;
ext2fs_iblk_set(fs, &inode, fastlink ? 0 : 1);
inode.i_links_count = 1;
inode.i_size = target_len;
/* The time fields are set by ext2fs_write_new_inode() */
if (fastlink) {
/* Fast symlinks, target stored in inode */
strcpy((char *)&inode.i_block, target);
} else {
/* Slow symlinks, target stored in the first block */
memset(block_buf, 0, fs->blocksize);
strcpy(block_buf, target);
if (fs->super->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_EXTENTS) {
/*
* The extent bmap is setup after the inode and block
* have been written out below.
*/
inode.i_flags |= EXT4_EXTENTS_FL;
}
}
/*
* Write out the inode and inode data block. The inode generation
* number is assigned by write_new_inode, which means that the
* operations using ino must come after it.
*/
retval = ext2fs_write_new_inode(fs, ino, &inode);
if (retval)
goto cleanup;
if (!fastlink) {
retval = ext2fs_bmap2(fs, ino, &inode, NULL, BMAP_SET, 0, NULL,
&blk);
if (retval)
goto cleanup;
retval = io_channel_write_blk64(fs->io, blk, 1, block_buf);
if (retval)
goto cleanup;
}
/*
* Link the symlink into the filesystem hierarchy
*/
if (name) {
retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
&scratch_ino);
if (!retval) {
retval = EXT2_ET_FILE_EXISTS;
goto cleanup;
}
if (retval != EXT2_ET_FILE_NOT_FOUND)
goto cleanup;
retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_SYMLINK);
if (retval)
goto cleanup;
}
/*
* Update accounting....
*/
if (!fastlink)
ext2fs_block_alloc_stats2(fs, blk, +1);
ext2fs_inode_alloc_stats2(fs, ino, +1, 0);
cleanup:
if (block_buf)
ext2fs_free_mem(&block_buf);
return retval;
}
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
const char *name)
{
ext2_extent_handle_t handle;
errcode_t retval;
struct ext2_inode parent_inode, inode;
ext2_ino_t ino = inum;
ext2_ino_t scratch_ino;
blk64_t blk;
char *block = 0;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/*
* Allocate an inode, if necessary
*/
if (!ino) {
retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
0, &ino);
if (retval)
goto cleanup;
}
/*
* Allocate a data block for the directory
*/
retval = ext2fs_new_block2(fs, 0, 0, &blk);
if (retval)
goto cleanup;
/*
* Create a scratch template for the directory
*/
retval = ext2fs_new_dir_block(fs, ino, parent, &block);
if (retval)
goto cleanup;
/*
* Get the parent's inode, if necessary
*/
if (parent != ino) {
retval = ext2fs_read_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
} else
memset(&parent_inode, 0, sizeof(parent_inode));
/*
* Create the inode structure....
*/
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
inode.i_uid = inode.i_gid = 0;
ext2fs_iblk_set(fs, &inode, 1);
if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS)
inode.i_flags |= EXT4_EXTENTS_FL;
else
inode.i_block[0] = blk;
inode.i_links_count = 2;
inode.i_size = fs->blocksize;
/*
* Write out the inode and inode data block
*/
retval = ext2fs_write_dir_block(fs, blk, block);
if (retval)
goto cleanup;
retval = ext2fs_write_new_inode(fs, ino, &inode);
if (retval)
goto cleanup;
if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
retval = ext2fs_extent_open2(fs, ino, &inode, &handle);
if (retval)
goto cleanup;
retval = ext2fs_extent_set_bmap(handle, 0, blk, 0);
ext2fs_extent_free(handle);
if (retval)
goto cleanup;
}
/*
* Link the directory into the filesystem hierarchy
*/
if (name) {
retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
&scratch_ino);
if (!retval) {
retval = EXT2_ET_DIR_EXISTS;
name = 0;
goto cleanup;
}
if (retval != EXT2_ET_FILE_NOT_FOUND)
goto cleanup;
retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
if (retval)
goto cleanup;
}
/*
* Update parent inode's counts
*/
if (parent != ino) {
parent_inode.i_links_count++;
retval = ext2fs_write_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
}
/*
* Update accounting....
*/
ext2fs_block_alloc_stats2(fs, blk, +1);
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
cleanup:
if (block)
ext2fs_free_mem(&block);
return retval;
}
static errcode_t mk_hugefile(ext2_filsys fs, blk64_t num,
ext2_ino_t dir, unsigned long idx, ext2_ino_t *ino)
{
errcode_t retval;
blk64_t lblk, bend = 0;
__u64 size;
blk64_t left;
blk64_t count = 0;
struct ext2_inode inode;
ext2_extent_handle_t handle;
retval = ext2fs_new_inode(fs, 0, LINUX_S_IFREG, NULL, ino);
if (retval)
return retval;
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFREG | (0666 & ~fs->umask);
inode.i_links_count = 1;
inode.i_uid = uid & 0xFFFF;
ext2fs_set_i_uid_high(inode, (uid >> 16) & 0xffff);
inode.i_gid = gid & 0xFFFF;
ext2fs_set_i_gid_high(inode, (gid >> 16) & 0xffff);
retval = ext2fs_write_new_inode(fs, *ino, &inode);
if (retval)
return retval;
ext2fs_inode_alloc_stats2(fs, *ino, +1, 0);
retval = ext2fs_extent_open2(fs, *ino, &inode, &handle);
if (retval)
return retval;
/*
* We don't use ext2fs_fallocate() here because hugefiles are
* designed to be physically contiguous (if the block group
* descriptors are configured to be in a single block at the
* beginning of the file system, by using the
* packed_meta_blocks layout), with the extent tree blocks
* allocated near the beginning of the file system.
*/
lblk = 0;
left = num ? num : 1;
while (left) {
blk64_t pblk, end;
blk64_t n = left;
retval = ext2fs_find_first_zero_block_bitmap2(fs->block_map,
goal, ext2fs_blocks_count(fs->super) - 1, &end);
if (retval)
goto errout;
goal = end;
retval = ext2fs_find_first_set_block_bitmap2(fs->block_map, goal,
ext2fs_blocks_count(fs->super) - 1, &bend);
if (retval == ENOENT) {
bend = ext2fs_blocks_count(fs->super);
if (num == 0)
left = 0;
}
if (!num || bend - goal < left)
n = bend - goal;
pblk = goal;
if (num)
left -= n;
goal += n;
count += n;
ext2fs_block_alloc_stats_range(fs, pblk, n, +1);
if (zero_hugefile) {
blk64_t ret_blk;
retval = ext2fs_zero_blocks2(fs, pblk, n,
&ret_blk, NULL);
if (retval)
com_err(program_name, retval,
_("while zeroing block %llu "
"for hugefile"), ret_blk);
}
while (n) {
blk64_t l = n;
struct ext2fs_extent newextent;
if (l > EXT_INIT_MAX_LEN)
l = EXT_INIT_MAX_LEN;
newextent.e_len = l;
newextent.e_pblk = pblk;
newextent.e_lblk = lblk;
newextent.e_flags = 0;
retval = ext2fs_extent_insert(handle,
EXT2_EXTENT_INSERT_AFTER, &newextent);
if (retval)
return retval;
pblk += l;
lblk += l;
n -= l;
}
}
retval = ext2fs_read_inode(fs, *ino, &inode);
if (retval)
goto errout;
retval = ext2fs_iblk_add_blocks(fs, &inode,
count / EXT2FS_CLUSTER_RATIO(fs));
if (retval)
goto errout;
size = (__u64) count * fs->blocksize;
retval = ext2fs_inode_size_set(fs, &inode, size);
if (retval)
goto errout;
retval = ext2fs_write_new_inode(fs, *ino, &inode);
if (retval)
goto errout;
if (idx_digits)
sprintf(fn_numbuf, "%0*lu", idx_digits, idx);
else if (num_files > 1)
sprintf(fn_numbuf, "%lu", idx);
retry:
retval = ext2fs_link(fs, dir, fn_buf, *ino, EXT2_FT_REG_FILE);
if (retval == EXT2_ET_DIR_NO_SPACE) {
retval = ext2fs_expand_dir(fs, dir);
if (retval)
goto errout;
goto retry;
}
if (retval)
goto errout;
errout:
if (handle)
ext2fs_extent_free(handle);
return retval;
}
int do_create (ext2_filsys e2fs, const char *path, mode_t mode, dev_t dev, const char *fastsymlink)
{
int rt;
time_t tm;
errcode_t rc;
char *p_path;
char *r_path;
ext2_ino_t ino;
struct ext2_inode inode;
ext2_ino_t n_ino;
struct fuse_context *ctx;
debugf("enter");
debugf("path = %s, mode: 0%o", path, mode);
rt=do_check_split(path, &p_path, &r_path);
debugf("parent: %s, child: %s", p_path, r_path);
rt = do_readinode(e2fs, p_path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &inode); failed", p_path);
free_split(p_path, r_path);
return rt;
}
rc = ext2fs_new_inode(e2fs, ino, mode, 0, &n_ino);
if (rc) {
debugf("ext2fs_new_inode(ep.fs, ino, mode, 0, &n_ino); failed");
return -ENOMEM;
}
do {
debugf("calling ext2fs_link(e2fs, %d, %s, %d, %d);", ino, r_path, n_ino, do_modetoext2lag(mode));
rc = ext2fs_link(e2fs, ino, r_path, n_ino, do_modetoext2lag(mode));
if (rc == EXT2_ET_DIR_NO_SPACE) {
debugf("calling ext2fs_expand_dir(e2fs, &d)", ino);
if (ext2fs_expand_dir(e2fs, ino)) {
debugf("error while expanding directory %s (%d)", p_path, ino);
free_split(p_path, r_path);
return -ENOSPC;
}
}
} while (rc == EXT2_ET_DIR_NO_SPACE);
if (rc) {
debugf("ext2fs_link(e2fs, %d, %s, %d, %d); failed", ino, r_path, n_ino, do_modetoext2lag(mode));
free_split(p_path, r_path);
return -EIO;
}
if (ext2fs_test_inode_bitmap(e2fs->inode_map, n_ino)) {
debugf("inode already set");
}
ext2fs_inode_alloc_stats2(e2fs, n_ino, +1, 0);
memset(&inode, 0, sizeof(inode));
tm = e2fs->now ? e2fs->now : time(NULL);
inode.i_mode = mode;
inode.i_atime = inode.i_ctime = inode.i_mtime = tm;
inode.i_links_count = 1;
inode.i_size = 0;
ctx = fuse_get_context();
if (ctx) {
inode.i_uid = ctx->uid;
inode.i_gid = ctx->gid;
}
if (S_ISCHR(mode) || S_ISBLK(mode)) {
if (old_valid_dev(dev))
inode.i_block[0]= ext2fs_cpu_to_le32(old_encode_dev(dev));
else
inode.i_block[1]= ext2fs_cpu_to_le32(new_encode_dev(dev));
}
if (S_ISLNK(mode) && fastsymlink != NULL) {
inode.i_size = strlen(fastsymlink);
strncpy((char *)&(inode.i_block[0]),fastsymlink,
(EXT2_N_BLOCKS * sizeof(inode.i_block[0])));
}
rc = ext2fs_write_new_inode(e2fs, n_ino, &inode);
if (rc) {
debugf("ext2fs_write_new_inode(e2fs, n_ino, &inode);");
free_split(p_path, r_path);
return -EIO;
}
/* update parent dir */
rt = do_readinode(e2fs, p_path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &inode); dailed", p_path);
free_split(p_path, r_path);
return -EIO;
}
inode.i_ctime = inode.i_mtime = tm;
rc = ext2fs_write_inode(e2fs, ino, &inode);
if (rc) {
debugf("ext2fs_write_inode(e2fs, ino, &inode); failed");
free_split(p_path, r_path);
return -EIO;
}
free_split(p_path, r_path);
debugf("leave");
return 0;
}
/* Make a special files (block and character devices), fifo's, and sockets */
errcode_t do_mknod_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
struct stat *st)
{
ext2_ino_t ino;
errcode_t retval;
struct ext2_inode inode;
unsigned long devmajor, devminor, mode;
int filetype;
switch(st->st_mode & S_IFMT) {
case S_IFCHR:
mode = LINUX_S_IFCHR;
filetype = EXT2_FT_CHRDEV;
break;
case S_IFBLK:
mode = LINUX_S_IFBLK;
filetype = EXT2_FT_BLKDEV;
break;
case S_IFIFO:
mode = LINUX_S_IFIFO;
filetype = EXT2_FT_FIFO;
break;
case S_IFSOCK:
mode = LINUX_S_IFSOCK;
filetype = EXT2_FT_SOCK;
break;
default:
return EXT2_ET_INVALID_ARGUMENT;
}
if (!(fs->flags & EXT2_FLAG_RW)) {
com_err(__func__, 0, "Filesystem opened read/only");
return EROFS;
}
retval = ext2fs_new_inode(fs, cwd, 010755, 0, &ino);
if (retval) {
com_err(__func__, retval, 0);
return retval;
}
#ifdef DEBUGFS
printf("Allocated inode: %u\n", ino);
#endif
retval = ext2fs_link(fs, cwd, name, ino, filetype);
if (retval == EXT2_ET_DIR_NO_SPACE) {
retval = ext2fs_expand_dir(fs, cwd);
if (retval) {
com_err(__func__, retval, "while expanding directory");
return retval;
}
retval = ext2fs_link(fs, cwd, name, ino, filetype);
}
if (retval) {
com_err(name, retval, 0);
return retval;
}
if (ext2fs_test_inode_bitmap2(fs->inode_map, ino))
com_err(__func__, 0, "Warning: inode already set");
ext2fs_inode_alloc_stats2(fs, ino, +1, 0);
memset(&inode, 0, sizeof(inode));
inode.i_mode = mode;
inode.i_atime = inode.i_ctime = inode.i_mtime =
fs->now ? fs->now : time(0);
if (filetype != S_IFIFO) {
devmajor = major(st->st_rdev);
devminor = minor(st->st_rdev);
if ((devmajor < 256) && (devminor < 256)) {
inode.i_block[0] = devmajor * 256 + devminor;
inode.i_block[1] = 0;
} else {
inode.i_block[0] = 0;
inode.i_block[1] = (devminor & 0xff) | (devmajor << 8) |
((devminor & ~0xff) << 12);
}
}
inode.i_links_count = 1;
retval = ext2fs_write_new_inode(fs, ino, &inode);
if (retval)
com_err(__func__, retval, "while creating inode %u", ino);
return retval;
}
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
const char *name)
{
errcode_t retval;
struct ext2_inode parent_inode, inode;
ext2_ino_t ino = inum;
ext2_ino_t scratch_ino;
blk_t blk;
char *block = 0;
char *ext2bp_block = 0;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/*
* Allocate an inode, if necessary
*/
if (!ino) {
retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
0, &ino);
if (retval)
goto cleanup;
}
/*
* Allocate a data block for the directory
*/
retval = ext2fs_new_block(fs, 0, 0, &blk);
printf("Using block %lu for the dir\n", blk);
if (retval)
goto cleanup;
printf("Writing the dir info into the buffer\n");
/*
* Create a scratch template for the directory
*/
/* Vijay: Offset the block address by the backpointer information */
retval = ext2fs_new_dir_block(fs, ino, parent, &block);
//ext2bp_block = block + EXT2BP_HEADER_SIZE;
//retval = ext2fs_new_dir_block(fs, ino, parent, &ext2bp_block);
if (retval)
goto cleanup;
/*
* Get the parent's inode, if necessary
*/
if (parent != ino) {
retval = ext2fs_read_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
} else
memset(&parent_inode, 0, sizeof(parent_inode));
/*
* Create the inode structure....
*/
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
inode.i_uid = inode.i_gid = 0;
ext2fs_iblk_set(fs, &inode, 1);
inode.i_block[0] = blk;
inode.i_links_count = 2;
inode.i_size = fs->blocksize;
/* Vijay: Adding backlink to the inode - Modifying position 0
* since this is a new inode - It will not have any other links
* pointing to it. First, we need to reset all the backlinks.
*/
printf("Vijay: Adding the backlink to %s\n", name);
int i;
for(i=0; i < EXT2_N_LINKS; i++)
inode.i_backlinks[i] = 0;
inode.i_backlinks[0] = parent;
printf("Going to write the dir block\n");
/*
* Write out the inode and inode data block
*/
retval = ext2fs_write_dir_block(fs, blk, block);
if (retval)
goto cleanup;
retval = ext2fs_write_new_inode(fs, ino, &inode);
if (retval)
goto cleanup;
printf("Link the directory into the filesystem hierarchy\n");
/*
* Link the directory into the filesystem hierarchy
*/
if (name) {
retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
&scratch_ino);
if (!retval) {
retval = EXT2_ET_DIR_EXISTS;
name = 0;
goto cleanup;
}
if (retval != EXT2_ET_FILE_NOT_FOUND)
goto cleanup;
retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
printf("Linking done: %lu\n", retval);
if (retval)
goto cleanup;
}
/*
* Update parent inode's counts
*/
if (parent != ino) {
parent_inode.i_links_count++;
retval = ext2fs_write_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
}
/*
* Update accounting....
*/
ext2fs_block_alloc_stats(fs, blk, +1);
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
cleanup:
if (block)
ext2fs_free_mem(&block);
return retval;
}
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
const char *name)
{
errcode_t retval;
struct ext2_inode parent_inode, inode;
ext2_ino_t ino = inum;
ext2_ino_t scratch_ino;
blk_t blk;
char *block = 0;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/*
* Allocate an inode, if necessary
*/
if (!ino) {
retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
0, &ino);
if (retval)
goto cleanup;
}
/*
* Allocate a data block for the directory
*/
retval = ext2fs_new_block(fs, 0, 0, &blk);
if (retval)
goto cleanup;
/*
* Create a scratch template for the directory
*/
retval = ext2fs_new_dir_block(fs, ino, parent, &block);
if (retval)
goto cleanup;
/*
* Get the parent's inode, if necessary
*/
if (parent != ino) {
retval = ext2fs_read_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
} else
memset(&parent_inode, 0, sizeof(parent_inode));
/*
* Create the inode structure....
*/
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
inode.i_uid = inode.i_gid = 0;
inode.i_blocks = fs->blocksize / 512;
inode.i_block[0] = blk;
inode.i_links_count = 2;
inode.i_ctime = inode.i_atime = inode.i_mtime = fs->now ? fs->now : time(NULL);
inode.i_size = fs->blocksize;
/*
* Write out the inode and inode data block
*/
retval = ext2fs_write_dir_block(fs, blk, block);
if (retval)
goto cleanup;
retval = ext2fs_write_new_inode(fs, ino, &inode);
if (retval)
goto cleanup;
/*
* Link the directory into the filesystem hierarchy
*/
if (name) {
retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
&scratch_ino);
if (!retval) {
retval = EXT2_ET_DIR_EXISTS;
name = 0;
goto cleanup;
}
if (retval != EXT2_ET_FILE_NOT_FOUND)
goto cleanup;
retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
if (retval)
goto cleanup;
}
/*
* Update parent inode's counts
*/
if (parent != ino) {
parent_inode.i_links_count++;
retval = ext2fs_write_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
}
/*
* Update accounting....
*/
ext2fs_block_alloc_stats(fs, blk, +1);
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
cleanup:
if (block)
ext2fs_free_mem(&block);
return retval;
}
static ext2_ino_t ext2CreateSymlink(ext2_vd *vd, const char *path, const char * targetdir, const char * name, mode_t type)
{
ext2_inode_t *target_ni = NULL;
ext2_ino_t newentry = 0;
ext2_ino_t ino = 0;
// Check if it does exist
target_ni = ext2OpenEntry(vd, targetdir);
if (!target_ni)
goto cleanup;
int err = ext2fs_new_inode(vd->fs, target_ni->ino, type, 0, &ino);
if (err) {
errno = EFAULT;
goto cleanup;
}
while((err = ext2fs_link(vd->fs, target_ni->ino, name, ino, EXT2_FT_SYMLINK)) == EXT2_ET_DIR_NO_SPACE)
{
if (ext2fs_expand_dir(vd->fs, target_ni->ino) != EXT2_ET_OK) {
errno = EMLINK;
goto cleanup;
}
}
if(err != EXT2_ET_OK) {
errno = EMLINK;
return 0;
}
ext2fs_inode_alloc_stats2(vd->fs, ino, +1, 0);
struct ext2_inode inode;
memset(&inode, 0, sizeof(inode));
inode.i_mode = type;
inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
inode.i_links_count = 1;
inode.i_size = strlen(path); //initial size of file
inode.i_uid = target_ni->ni.i_uid;
inode.i_gid = target_ni->ni.i_gid;
if (strlen(path) <= sizeof(inode.i_block))
{
/* fast symlink */
strncpy((char *)&(inode.i_block[0]),path,sizeof(inode.i_blocks));
}
else
{
/* slow symlink */
char * buffer = mem_alloc(vd->fs->blocksize);
if (buffer)
{
blk_t blk;
strncpy(buffer, path, vd->fs->blocksize);
err = ext2fs_new_block(vd->fs, 0, 0, &blk);
if (!err)
{
inode.i_block[0] = blk;
inode.i_blocks = vd->fs->blocksize / 512;
vd->fs->io->manager->write_blk(vd->fs->io, blk, 1, buffer);
ext2fs_block_alloc_stats(vd->fs, blk, +1);
}
mem_free(buffer);
}
}
if(ext2fs_write_new_inode(vd->fs, ino, &inode) != 0)
newentry = ino;
cleanup:
if(target_ni)
ext2CloseEntry(vd, target_ni);
return newentry;
}
void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse)
{
ext2fs_inode_alloc_stats2(fs, ino, inuse, 0);
}
/*
* This routine gets the lost_and_found inode, making it a directory
* if necessary
*/
ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix)
{
ext2_filsys fs = ctx->fs;
ext2_ino_t ino;
blk64_t blk;
errcode_t retval;
struct ext2_inode inode;
char * block;
static const char name[] = "lost+found";
struct problem_context pctx;
int will_rehash, flags;
if (ctx->lost_and_found)
return ctx->lost_and_found;
clear_problem_context(&pctx);
will_rehash = e2fsck_dir_will_be_rehashed(ctx, EXT2_ROOT_INO);
if (will_rehash) {
flags = ctx->fs->flags;
ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
}
retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name,
sizeof(name)-1, 0, &ino);
if (will_rehash)
ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
(ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
if (retval && !fix)
return 0;
if (!retval) {
/* Lost+found shouldn't have inline data */
retval = ext2fs_read_inode(fs, ino, &inode);
if (fix && retval)
return 0;
if (fix && (inode.i_flags & EXT4_INLINE_DATA_FL)) {
if (!fix_problem(ctx, PR_3_LPF_INLINE_DATA, &pctx))
return 0;
goto unlink;
}
if (fix && (inode.i_flags & EXT4_ENCRYPT_FL)) {
if (!fix_problem(ctx, PR_3_LPF_ENCRYPTED, &pctx))
return 0;
goto unlink;
}
if (ext2fs_check_directory(fs, ino) == 0) {
ctx->lost_and_found = ino;
return ino;
}
/* Lost+found isn't a directory! */
if (!fix)
return 0;
pctx.ino = ino;
if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx))
return 0;
unlink:
/* OK, unlink the old /lost+found file. */
pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0);
if (pctx.errcode) {
pctx.str = "ext2fs_unlink";
fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
return 0;
}
(void) e2fsck_dir_info_set_parent(ctx, ino, 0);
e2fsck_adjust_inode_count(ctx, ino, -1);
/*
* If the old lost+found was a directory, we've just
* disconnected it from the directory tree, which
* means we need to restart the directory tree scan.
* The simplest way to do this is restart the whole
* e2fsck operation.
*/
if (LINUX_S_ISDIR(inode.i_mode))
ctx->flags |= E2F_FLAG_RESTART;
} else if (retval != EXT2_ET_FILE_NOT_FOUND) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx);
}
if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0))
return 0;
/*
* Read the inode and block bitmaps in; we'll be messing with
* them.
*/
e2fsck_read_bitmaps(ctx);
/*
* First, find a free block
*/
if (ctx->lnf_repair_block) {
blk = ctx->lnf_repair_block;
ctx->lnf_repair_block = 0;
goto skip_new_block;
}
retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
if (retval == EXT2_ET_BLOCK_ALLOC_FAIL &&
fix_problem(ctx, PR_3_LPF_NO_SPACE, &pctx)) {
fix_problem(ctx, PR_3_NO_SPACE_TO_RECOVER, &pctx);
ctx->lost_and_found = EXT2_ROOT_INO;
return 0;
}
if (retval) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx);
return 0;
}
ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
skip_new_block:
ext2fs_block_alloc_stats2(fs, blk, +1);
/*
* Next find a free inode.
*/
retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700,
ctx->inode_used_map, &ino);
if (retval == EXT2_ET_INODE_ALLOC_FAIL &&
fix_problem(ctx, PR_3_LPF_NO_SPACE, &pctx)) {
fix_problem(ctx, PR_3_NO_SPACE_TO_RECOVER, &pctx);
ctx->lost_and_found = EXT2_ROOT_INO;
return 0;
}
if (retval) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx);
return 0;
}
ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
/*
* Set up the inode structure
*/
memset(&inode, 0, sizeof(inode));
inode.i_mode = 040700;
inode.i_size = fs->blocksize;
inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now;
inode.i_links_count = 2;
ext2fs_iblk_set(fs, &inode, 1);
inode.i_block[0] = blk;
/*
* Next, write out the inode.
*/
pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode);
if (pctx.errcode) {
pctx.str = "ext2fs_write_inode";
fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
return 0;
}
/*
* Now let's create the actual data block for the inode.
* Due to metadata_csum, the directory block MUST be written
* after the inode is written to disk!
*/
retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block);
if (retval) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx);
return 0;
}
retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
ext2fs_free_mem(&block);
if (retval) {
pctx.errcode = retval;
fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx);
return 0;
}
/*
* Finally, create the directory link
*/
pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR);
if (pctx.errcode == EXT2_ET_DIR_NO_SPACE) {
pctx.errcode = ext2fs_expand_dir(fs, EXT2_ROOT_INO);
if (pctx.errcode)
goto link_error;
pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino,
EXT2_FT_DIR);
}
if (pctx.errcode) {
link_error:
pctx.str = "ext2fs_link";
fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
return 0;
}
/*
* Miscellaneous bookkeeping that needs to be kept straight.
*/
e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO);
e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1);
ext2fs_icount_store(ctx->inode_count, ino, 2);
ext2fs_icount_store(ctx->inode_link_info, ino, 2);
ctx->lost_and_found = ino;
quota_data_add(ctx->qctx, &inode, ino, fs->blocksize);
quota_data_inodes(ctx->qctx, &inode, ino, +1);
#if 0
printf("/lost+found created; inode #%lu\n", ino);
#endif
return ino;
}
