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xfs: Extend project quotas to support 32bit project ids

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This patch adds support for 32bit project quota identifiers.

On disk format is backward compatible with 16bit projid numbers. projid
on disk is now kept in two 16bit values - di_projid_lo (which holds the
same position as old 16bit projid value) and new di_projid_hi (takes
existing padding) and converts from/to 32bit value on the fly.

xfs_admin (for existing fs), mkfs.xfs (for new fs) needs to be used
to enable PROJID32BIT support.

Signed-off-by: Arkadiusz Miśkiewicz <arekm@maven.pl>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Arkadiusz Mi?kiewicz
2010-09-26 06:10:18 +00:00
committed by Alex Elder
parent 1a1a3e97ba
commit 6743099ce5
16 changed files with 80 additions and 44 deletions
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5
fs/xfs/xfs_dinode.h
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@ -49,8 +49,9 @@ typedef struct xfs_dinode {
__be32 di_uid; /* owner's user id */
__be32 di_gid; /* owner's group id */
__be32 di_nlink; /* number of links to file */
__be16 di_projid; /* owner's project id */
__u8 di_pad[8]; /* unused, zeroed space */
__be16 di_projid_lo; /* lower part of owner's project id */
__be16 di_projid_hi; /* higher part owner's project id */
__u8 di_pad[6]; /* unused, zeroed space */
__be16 di_flushiter; /* incremented on flush */
xfs_timestamp_t di_atime; /* time last accessed */
xfs_timestamp_t di_mtime; /* time last modified */