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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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26
fs/xfs/xfs_inode.h
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@@ -134,8 +134,9 @@ typedef struct xfs_icdinode {
__uint32_t di_uid; /* owner's user id */
__uint32_t di_gid; /* owner's group id */
__uint32_t di_nlink; /* number of links to file */
__uint16_t di_projid; /* owner's project id */
__uint8_t di_pad[8]; /* unused, zeroed space */
__uint16_t di_projid_lo; /* lower part of owner's project id */
__uint16_t di_projid_hi; /* higher part of owner's project id */
__uint8_t di_pad[6]; /* unused, zeroed space */
__uint16_t di_flushiter; /* incremented on flush */
xfs_ictimestamp_t di_atime; /* time last accessed */
xfs_ictimestamp_t di_mtime; /* time last modified */
@@ -333,6 +334,25 @@ xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
return ret;
}
/*
* Project quota id helpers (previously projid was 16bit only
* and using two 16bit values to hold new 32bit projid was choosen
* to retain compatibility with "old" filesystems).
*/
static inline prid_t
xfs_get_projid(struct xfs_inode *ip)
{
return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
}
static inline void
xfs_set_projid(struct xfs_inode *ip,
prid_t projid)
{
ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
}
/*
* Manage the i_flush queue embedded in the inode. This completion
* queue synchronizes processes attempting to flush the in-core
@@ -455,7 +475,7 @@ void xfs_inode_free(struct xfs_inode *ip);
* xfs_inode.c prototypes.
*/
int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
xfs_nlink_t, xfs_dev_t, xfs_prid_t, int,
xfs_nlink_t, xfs_dev_t, prid_t, int,
struct xfs_buf **, boolean_t *, xfs_inode_t **);
uint xfs_ip2xflags(struct xfs_inode *);