From f3cd63639b324ba30805cdcc24d0955cea4c666b Mon Sep 17 00:00:00 2001
From: fanyong <fanyong>
Date: Tue, 31 Oct 2006 08:50:45 +0000
Subject: [PATCH] Support flush specific user identity info.

---
 lustre/mdt/mdt_identity.c |  4 ++--
 lustre/mdt/mdt_internal.h |  2 +-
 lustre/mdt/mdt_lproc.c    | 21 +++++++++++++++++----
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/lustre/mdt/mdt_identity.c b/lustre/mdt/mdt_identity.c
index 399b0b2..0db1208 100644
--- a/lustre/mdt/mdt_identity.c
+++ b/lustre/mdt/mdt_identity.c
@@ -199,9 +199,9 @@ struct upcall_cache_ops mdt_identity_upcall_cache_ops = {
         .parse_downcall = mdt_identity_parse_downcall,
 };
 
-void mdt_flush_identity(struct upcall_cache *cache, __u32 uid)
+void mdt_flush_identity(struct upcall_cache *cache, int uid)
 {
-        if (uid == -1)
+        if (uid < 0)
                 upcall_cache_flush_idle(cache);
         else
                 upcall_cache_flush_one(cache, (__u64)uid, NULL);
diff --git a/lustre/mdt/mdt_internal.h b/lustre/mdt/mdt_internal.h
index 8c2baca..8ef055a 100644
--- a/lustre/mdt/mdt_internal.h
+++ b/lustre/mdt/mdt_internal.h
@@ -593,7 +593,7 @@ struct mdt_identity *mdt_identity_get(struct upcall_cache *, __u32);
 
 void mdt_identity_put(struct upcall_cache *, struct mdt_identity *);
 
-void mdt_flush_identity(struct upcall_cache *, __u32);
+void mdt_flush_identity(struct upcall_cache *, int);
 
 __u32 mdt_identity_get_setxid_perm(struct mdt_identity *, __u32, lnet_nid_t);
 
diff --git a/lustre/mdt/mdt_lproc.c b/lustre/mdt/mdt_lproc.c
index 941fd80..c9aeb80 100644
--- a/lustre/mdt/mdt_lproc.c
+++ b/lustre/mdt/mdt_lproc.c
@@ -154,8 +154,21 @@ static int lprocfs_wr_identity_flush(struct file *file, const char *buffer,
 {
         struct obd_device *obd = data;
         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+        char tmp[8];
+        int uid;
 
-        upcall_cache_flush_idle(mdt->mdt_identity_cache);
+        memset(tmp, 0, 8);
+        if (copy_from_user(tmp, buffer, (count > 7) ? 7 : count)) {
+                CERROR("%s: bad data\n", obd->obd_name);
+                return -EFAULT;
+        }
+
+        if (sscanf(tmp, "%d", &uid) != 1) {
+                CERROR("%s: invalid uid\n", obd->obd_name);
+                return -EFAULT;
+        }
+
+        mdt_flush_identity(mdt->mdt_identity_cache, uid);
         return count;
 }
 
@@ -400,7 +413,7 @@ static int lprocfs_wr_rootsquash_uid(struct file *file, const char *buffer,
         if (!mdt->mdt_rootsquash_info)
                 OBD_ALLOC_PTR(mdt->mdt_rootsquash_info);
         if (!mdt->mdt_rootsquash_info)
-                RETURN(-ENOMEM);
+                return -ENOMEM;
 
         mdt->mdt_rootsquash_info->rsi_uid = val;
         return count;
@@ -432,7 +445,7 @@ static int lprocfs_wr_rootsquash_gid(struct file *file, const char *buffer,
         if (!mdt->mdt_rootsquash_info)
                 OBD_ALLOC_PTR(mdt->mdt_rootsquash_info);
         if (!mdt->mdt_rootsquash_info)
-                RETURN(-ENOMEM);
+                return -ENOMEM;
 
         mdt->mdt_rootsquash_info->rsi_gid = val;
         return count;
@@ -516,7 +529,7 @@ static int lprocfs_wr_nosquash_nids(struct file *file, const char *buffer,
         if (!mdt->mdt_rootsquash_info)
                 OBD_ALLOC_PTR(mdt->mdt_rootsquash_info);
         if (!mdt->mdt_rootsquash_info)
-                RETURN(-ENOMEM);
+                return -ENOMEM;
 
         remove_newline(skips);
         do_process_nosquash_nids(mdt, skips);
-- 
1.8.3.1