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authorJan Kara <jack@suse.cz>2008-10-02 18:48:10 +0400
committerMark Fasheh <mfasheh@suse.com>2009-01-05 19:40:22 +0300
commit4d59bce4f9eaf26d6d9046b56a2f1c0c7f20981d (patch)
tree8acb07cd2bf0ab360e6397dfa816feb009fc49af /include/linux/quota.h
parentdb49d2df489f727096438706a5428115e84a3f0d (diff)
downloadlinux-4d59bce4f9eaf26d6d9046b56a2f1c0c7f20981d.tar.xz
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.h26
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 */