Add NT quota support. Patch from Stefan (metze) Metzemacher

1. Allows to change quota settings for shared mount points from Win2K and WinXP from Explorer properties tab
2. Disabled by default and when requested, will be probed and enabled only on Linux where it works
3. Was tested for approx. two weeks now on Linux by two independent QA teams, have not found any bugs so far
Documentation to follow
(This used to be commit 4bf022ce9e45be85609426762ba2644ac2031326)

1 files changed, 109 insertions, 0 deletions

diff --git a/source3/smbd/quotas.c b/source3/smbd/quotas.c
index 5b843bd09a..0163120ee5 100644
--- a/source3/smbd/quotas.c
+++ b/source3/smbd/quotas.c
@@ -27,6 +27,10 @@
 
 #include "includes.h"
 
+#ifndef HAVE_SYS_QUOTAS
+
+#ifdef WITH_QUOTAS
+
 #if defined(VXFS_QUOTA)
 
 /*
@@ -1112,3 +1116,108 @@ BOOL disk_quotas_vxfs(const pstring name, char *path, SMB_BIG_UINT *bsize, SMB_B
 #endif /* SUNOS5 || ... */
 
 #endif /* VXFS_QUOTA */
+
+#else /* WITH_QUOTAS */
+
+BOOL disk_quotas(const char *path,SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
+{
+  (*bsize) = 512; /* This value should be ignored */
+
+  /* And just to be sure we set some values that hopefully */
+  /* will be larger that any possible real-world value     */
+  (*dfree) = (SMB_BIG_UINT)-1;
+  (*dsize) = (SMB_BIG_UINT)-1;
+
+  /* As we have select not to use quotas, allways fail */
+  return False;
+}
+#endif /* WITH_QUOTAS */
+
+#else /* HAVE_SYS_QUOTAS */
+/* wrapper to the new sys_quota interface 
+   this file should be removed later
+   */
+BOOL disk_quotas(const char *path,SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
+{
+	int r;
+	SMB_DISK_QUOTA D;
+	unid_t id;
+
+	id.uid = geteuid();
+  
+  	r=sys_get_quota(path, SMB_USER_QUOTA_TYPE, id, &D);
+
+	/* Use softlimit to determine disk space, except when it has been exceeded */
+	*bsize = D.bsize;
+	if (r == -1) {
+		if (errno == EDQUOT) {
+			*dfree =0;
+			*dsize =D.curblocks;
+			return (True);
+		} else {
+			goto try_group_quota;
+		}
+	}
+
+	/* Use softlimit to determine disk space, except when it has been exceeded */
+	if (
+		(D.softlimit && D.curblocks >= D.softlimit) ||
+		(D.hardlimit && D.curblocks >= D.hardlimit) ||
+		(D.isoftlimit && D.curinodes >= D.isoftlimit) ||
+		(D.ihardlimit && D.curinodes>=D.ihardlimit)
+	) {
+		*dfree = 0;
+		*dsize = D.curblocks;
+	} else if (D.softlimit==0 && D.hardlimit==0) {
+		goto try_group_quota;
+	} else {
+		if (D.softlimit == 0)
+			D.softlimit = D.hardlimit;
+		*dfree = D.softlimit - D.curblocks;
+		*dsize = D.softlimit;
+	}
+
+	return True;
+	
+try_group_quota:
+#ifdef HAVE_GROUP_QUOTA
+	id.gid = getegid();
+  
+  	r=sys_get_quota(path, SMB_GROUP_QUOTA_TYPE, id, &D);
+
+	/* Use softlimit to determine disk space, except when it has been exceeded */
+	*bsize = D.bsize;
+	if (r == -1) {
+		if (errno == EDQUOT) {
+			*dfree =0;
+			*dsize =D.curblocks;
+			return (True);
+		} else {
+			return False;
+		}
+	}
+
+	/* Use softlimit to determine disk space, except when it has been exceeded */
+	if (
+		(D.softlimit && D.curblocks >= D.softlimit) ||
+		(D.hardlimit && D.curblocks >= D.hardlimit) ||
+		(D.isoftlimit && D.curinodes >= D.isoftlimit) ||
+		(D.ihardlimit && D.curinodes>=D.ihardlimit)
+	) {
+		*dfree = 0;
+		*dsize = D.curblocks;
+	} else if (D.softlimit==0 && D.hardlimit==0) {
+		return False;
+	} else {
+		if (D.softlimit == 0)
+			D.softlimit = D.hardlimit;
+		*dfree = D.softlimit - D.curblocks;
+		*dsize = D.softlimit;
+	}
+
+	return (True);
+#else /* HAVE_GROUP_QUOTA */
+	return False;
+#endif /* HAVE_GROUP_QUOTA */
+}
+#endif /* HAVE_SYS_QUOTAS */