by Albino B Neto

Agreed. I makes sense to include it into e2fsprogs, thus chattr and lsattr.
It seems better to require e2fsprogs installed rather than xfsprogs when using
a feature of ext4.

Currently, I am using a independent tool to set and get project ID. And that
tool call IOCTL of EXT4_IOC_FSSETXATTR and EXT4_IOC_FSGETXATTR.

On Sat, Dec 12, 2015 at 7:13 PM, Andreas Dilger <[email protected]> wrote:
> On Oct 28, 2015, at 9:42 AM, Li Xi <[email protected]> wrote:
>>
>> This patch add EXT4_PROJINHERIT_FL to enable inherit feature
>> for project quota.
>>
>> Signed-off-by: Li Xi <[email protected]>
>> Change-Id: I61491333eabcc33ccc09fa1ed5f8ffe4c4220e57
>> ---
>> lib/e2p/pf.c | 1 +
>> lib/ext2fs/ext2_fs.h | 5 +++--
>> misc/chattr.c | 3 ++-
>> 3 files changed, 6 insertions(+), 3 deletions(-)
>>
>> diff --git a/lib/e2p/pf.c b/lib/e2p/pf.c
>> index 8961727..27421a6 100644
>> --- a/lib/e2p/pf.c
>> +++ b/lib/e2p/pf.c
>> @@ -46,6 +46,7 @@ static struct flags_name flags_array[] = {
>> { EXT4_HUGE_FILE_FL, "h", "Huge_file" },
>> { FS_NOCOW_FL, "C", "No_COW" },
>> { EXT4_INLINE_DATA_FL, "N", "Inline_Data" },
>> + { EXT4_PROJINHERIT_FL, "P", "Project_Iherit" },
>> { 0, NULL, NULL }
>> };
>>
>> diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
>> index 036e6ad..4e46f22 100644
>> --- a/lib/ext2fs/ext2_fs.h
>> +++ b/lib/ext2fs/ext2_fs.h
>> @@ -327,10 +327,11 @@ struct ext2_dx_tail {
>> #define EXT4_SNAPFILE_DELETED_FL 0x04000000 /* Snapshot is being deleted */
>> #define EXT4_SNAPFILE_SHRUNK_FL 0x08000000 /* Snapshot shrink has completed */
>> #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data */
>> +#define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
>> #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
>>
>> -#define EXT2_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */
>> -#define EXT2_FL_USER_MODIFIABLE 0x004B80FF /* User modifiable flags */
>> +#define EXT2_FL_USER_VISIBLE 0x204BDFFF /* User visible flags */
>> +#define EXT2_FL_USER_MODIFIABLE 0x204B80FF /* User modifiable flags */
>>
>> /*
>> * ioctl commands
>> diff --git a/misc/chattr.c b/misc/chattr.c
>> index e55d693..40069c9 100644
>> --- a/misc/chattr.c
>> +++ b/misc/chattr.c
>> @@ -83,7 +83,7 @@ static unsigned long sf;
>> static void usage(void)
>> {
>> fprintf(stderr,
>> - _("Usage: %s [-RVf] [-+=aAcCdDeijsStTu] [-v version] files...\n"),
>> + _("Usage: %s [-RVf] [-+=aAcCdDeijPsStTu] [-v version] files...\n"),
>> program_name);
>> exit(1);
>> }
>> @@ -103,6 +103,7 @@ static const struct flags_char flags_array[] = {
>> { EXT4_EXTENTS_FL, 'e'},
>> { EXT2_IMMUTABLE_FL, 'i' },
>> { EXT3_JOURNAL_DATA_FL, 'j' },
>> + { EXT4_PROJINHERIT_FL, 'P' },
>> { EXT2_SECRM_FL, 's' },
>> { EXT2_UNRM_FL, 'u' },
>> { EXT2_NOTAIL_FL, 't' },
>
> How does one set the actual project ID on an inode? I'd have thought that
> "chattr" and "lsattr -P" could change and list the project ID on an inode,
> since regular "stat" and "ls" will not do this today. I don't think it is OK
> to require xfsprogs to be installed to be able to set these fields, though
> chattr and lsattr should use the same ioctl() values FS_IOC_FSSETXATTR and
> FS_IOC_FSGETXATTR as the xfsprogs utils do.
>
> Cheers, Andreas
>
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