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| author | Jan Kara <jack@suse.cz> | 2008-08-20 17:50:32 +0200 |
|---|---|---|
| committer | Mark Fasheh <mfasheh@suse.com> | 2009-01-05 08:36:56 -0800 |
| commit | f55abc0fb9c3189de3da829adf3220322c0da43e (patch) | |
| tree | 0db4b838b0b90f27401783e8e7e45842ec91f90a /include/linux/quota.h | |
| parent | e4bc7b4b7ff783779b6928d55a9308910bf180a3 (diff) | |
| download | lwn-f55abc0fb9c3189de3da829adf3220322c0da43e.tar.gz lwn-f55abc0fb9c3189de3da829adf3220322c0da43e.zip | |
quota: Allow to separately enable quota accounting and enforcing limits
Split DQUOT_USR_ENABLED (and DQUOT_GRP_ENABLED) into DQUOT_USR_USAGE_ENABLED
and DQUOT_USR_LIMITS_ENABLED. This way we are able to separately enable /
disable whether we should:
1) ignore quotas completely
2) just keep uptodate information about usage
3) actually enforce quota limits
This is going to be useful when quota is treated as filesystem metadata - we
then want to keep quota information uptodate all the time and just enable /
disable limits enforcement.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'include/linux/quota.h')
| -rw-r--r-- | include/linux/quota.h | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/include/linux/quota.h b/include/linux/quota.h index 9ea468363f9f..93717abcd35b 100644 --- a/include/linux/quota.h +++ b/include/linux/quota.h @@ -318,12 +318,34 @@ struct quota_format_type { struct quota_format_type *qf_next; }; -#define DQUOT_USR_ENABLED 0x01 /* User diskquotas enabled */ -#define DQUOT_GRP_ENABLED 0x02 /* Group diskquotas enabled */ -#define DQUOT_USR_SUSPENDED 0x04 /* User diskquotas are off, but +/* Quota state flags - they actually come in two flavors - for users and groups */ +enum { + _DQUOT_USAGE_ENABLED = 0, /* Track disk usage for users */ + _DQUOT_LIMITS_ENABLED, /* Enforce quota limits for users */ + _DQUOT_SUSPENDED, /* User diskquotas are off, but * we have necessary info in * memory to turn them on */ -#define DQUOT_GRP_SUSPENDED 0x08 /* The same for group quotas */ + _DQUOT_STATE_FLAGS +}; +#define DQUOT_USAGE_ENABLED (1 << _DQUOT_USAGE_ENABLED) +#define DQUOT_LIMITS_ENABLED (1 << _DQUOT_LIMITS_ENABLED) +#define DQUOT_SUSPENDED (1 << _DQUOT_SUSPENDED) +#define DQUOT_STATE_FLAGS (DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED | \ + DQUOT_SUSPENDED) + +static inline unsigned int dquot_state_flag(unsigned int flags, int type) +{ + if (type == USRQUOTA) + return flags; + return flags << _DQUOT_STATE_FLAGS; +} + +static inline unsigned int dquot_generic_flag(unsigned int flags, int type) +{ + if (type == USRQUOTA) + return flags; + return flags >> _DQUOT_STATE_FLAGS; +} struct quota_info { unsigned int flags; /* Flags for diskquotas on this device */ |