在 2008-10-27一的 13:11 +0100，Jan Kara写道：
> Implement conversion functions for new version (version 1) of quota
> format which supports 64-bit block and inode limits and 64-bit inode
> usage. The original implementation has been written by Andrew Perepechko.
>
> Signed-off-by: Andrew Perepechko <andrew.perepechko@xxxxxxx>
> Signed-off-by: Jan Kara <jack@xxxxxxx>
> ---
> fs/quota_v2.c | 140 ++++++++++++++++++++++++++++++++++++++++++++-----------
> fs/quotaio_v2.h | 26 ++++++++--
> 2 files changed, 132 insertions(+), 34 deletions(-)
>
> diff --git a/fs/quota_v2.c b/fs/quota_v2.c
> index a371919..ac6668d 100644
> --- a/fs/quota_v2.c
> +++ b/fs/quota_v2.c
...
> @@ -73,7 +90,13 @@ static int v2_read_file_info(struct super_block *sb, int type)
> struct mem_dqinfo *info = sb_dqinfo(sb, type);
> struct qtree_mem_dqinfo *qinfo;
> ssize_t size;
> + int version = v2_check_quota_file_header(sb, type);
>
> + if (version < 0) {
> + printk(KERN_WARNING "Cannot identify quota file version on "
> + "device %s: %d\n", sb->s_id, version);
> + return -1;
> + }
> size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
> sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
> if (size != sizeof(struct v2_disk_dqinfo)) {
> @@ -88,9 +111,14 @@ static int v2_read_file_info(struct super_block *sb, int type)
> return -1;
> }
> qinfo = info->dqi_priv;
> - /* limits are stored as unsigned 32-bit data */
> - info->dqi_maxblimit = 0xffffffff;
> - info->dqi_maxilimit = 0xffffffff;
> + if (version == 0) {
> + /* limits are stored as unsigned 32-bit data */
> + info->dqi_maxblimit = 0xffffffff;
> + info->dqi_maxilimit = 0xffffffff;
> + } else {
> + info->dqi_maxblimit = 0x7fffffffffffffff;
> + info->dqi_maxilimit = 0x7fffffffffffffff;
> + }
I got some compile warning saying
fs/quota_v2.c: In function ‘v2_read_file_info’:
fs/quota_v2.c:119: warning: integer constant is too large for ‘long’ type
fs/quota_v2.c:120: warning: integer constant is too large for ‘long’ type
qsize_t is defined as __u64, however...
Mingming
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