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| author | Jan Kara <jack@suse.cz> | 2008-10-02 16:48:10 +0200 |
|---|---|---|
| committer | Mark Fasheh <mfasheh@suse.com> | 2009-01-05 08:40:22 -0800 |
| commit | 4d59bce4f9eaf26d6d9046b56a2f1c0c7f20981d (patch) | |
| tree | 8acb07cd2bf0ab360e6397dfa816feb009fc49af /include/linux/quota.h | |
| parent | db49d2df489f727096438706a5428115e84a3f0d (diff) | |
| download | linux-4d59bce4f9eaf26d6d9046b56a2f1c0c7f20981d.tar.gz linux-4d59bce4f9eaf26d6d9046b56a2f1c0c7f20981d.tar.bz2 linux-4d59bce4f9eaf26d6d9046b56a2f1c0c7f20981d.zip | |
quota: Keep which entries were set by SETQUOTA quotactl
Quota in a clustered environment needs to synchronize quota information
among cluster nodes. This means we have to occasionally update some
information in dquot from disk / network. On the other hand we have to
be careful not to overwrite changes administrator did via SETQUOTA.
So indicate in dquot->dq_flags which entries have been set by SETQUOTA
and quota format can clear these flags when it properly propagated
the changes.
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 | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/include/linux/quota.h b/include/linux/quota.h index 75bf761caef2..6d98885c16da 100644 --- a/include/linux/quota.h +++ b/include/linux/quota.h @@ -80,12 +80,21 @@ * Quota structure used for communication with userspace via quotactl * Following flags are used to specify which fields are valid */ -#define QIF_BLIMITS 1 -#define QIF_SPACE 2 -#define QIF_ILIMITS 4 -#define QIF_INODES 8 -#define QIF_BTIME 16 -#define QIF_ITIME 32 +enum { + QIF_BLIMITS_B = 0, + QIF_SPACE_B, + QIF_ILIMITS_B, + QIF_INODES_B, + QIF_BTIME_B, + QIF_ITIME_B, +}; + +#define QIF_BLIMITS (1 << QIF_BLIMITS_B) +#define QIF_SPACE (1 << QIF_SPACE_B) +#define QIF_ILIMITS (1 << QIF_ILIMITS_B) +#define QIF_INODES (1 << QIF_INODES_B) +#define QIF_BTIME (1 << QIF_BTIME_B) +#define QIF_ITIME (1 << QIF_ITIME_B) #define QIF_LIMITS (QIF_BLIMITS | QIF_ILIMITS) #define QIF_USAGE (QIF_SPACE | QIF_INODES) #define QIF_TIMES (QIF_BTIME | QIF_ITIME) @@ -242,6 +251,11 @@ extern struct dqstats dqstats; #define DQ_FAKE_B 3 /* no limits only usage */ #define DQ_READ_B 4 /* dquot was read into memory */ #define DQ_ACTIVE_B 5 /* dquot is active (dquot_release not called) */ +#define DQ_LASTSET_B 6 /* Following 6 bits (see QIF_) are reserved\ + * for the mask of entries set via SETQUOTA\ + * quotactl. They are set under dq_data_lock\ + * and the quota format handling dquot can\ + * clear them when it sees fit. */ struct dquot { struct hlist_node dq_hash; /* Hash list in memory */ |