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resize2fs: add support for new in-kernel online resize ioctl 

This is needed to support online resizing for > 32-bit file systems

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
bitmap-optimize
Yongqiang Yang 2011-09-14 11:55:59 -04:00 committed by Theodore Ts'o
parent 478113973e
commit 9f6ba888f0
2 changed files with 19 additions and 1 deletions
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1
lib/ext2fs/ext2_fs.h
View File

@ -327,6 +327,7 @@ struct ext4_new_group_input {
#define EXT2_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
#define EXT2_IOC_GROUP_ADD _IOW('f', 8,struct ext2_new_group_input)
#define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input)
#define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64)
/*
* Structure of an inode on the disk

19
resize/online.c
View File

@ -51,7 +51,7 @@ errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
fs->super->s_first_data_block,
EXT2_BLOCKS_PER_GROUP(fs->super)),
EXT2_DESC_PER_BLOCK(fs->super));
printf("old desc_blocks = %lu, new_desc_blocks = %lu\n",
printf("old_desc_blocks = %lu, new_desc_blocks = %lu\n",
fs->desc_blocks, new_desc_blocks);
if (!(fs->super->s_feature_compat &
EXT2_FEATURE_COMPAT_RESIZE_INODE) &&
@ -69,6 +69,23 @@ errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
}
size=ext2fs_blocks_count(sb);
if (ioctl(fd, EXT4_IOC_RESIZE_FS, new_size)) {
if (errno != ENOTTY) {
if (errno == EPERM)
com_err(program_name, 0,
_("Permission denied to resize filesystem"));
else
com_err(program_name, errno,
_("While checking for on-line resizing "
"support"));
exit(1);
}
} else {
close(fd);
return 0;
}
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
if (errno == EPERM)
com_err(program_name, 0,