---

yaml
---
r: 188543
b: refs/heads/master
c: 0dee3c2
h: refs/heads/master
i:
  188541: 63f3b84
  188539: 8c2e5d6
  188535: 61af4d1
  188527: b8fc511
  188511: b854c30
  188479: 4dddfed
  188415: 57c45dd
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7ad920b504a980adcab4d3f6b85695526e6fd7bb
+refs/heads/master: 0dee3c28af2fbe22ca62739a7f57da5435d35793

trunk/fs/ceph/ceph_fs.c

@@ -0,0 +1,80 @@
+/*
+ * Some non-inline ceph helpers
+ */
+#include "types.h"
+
+int ceph_flags_to_mode(int flags)
+{
+#ifdef O_DIRECTORY  /* fixme */
+	if ((flags & O_DIRECTORY) == O_DIRECTORY)
+		return CEPH_FILE_MODE_PIN;
+#endif
+#ifdef O_LAZY
+	if (flags & O_LAZY)
+		return CEPH_FILE_MODE_LAZY;
+#endif
+	if ((flags & O_APPEND) == O_APPEND)
+		flags |= O_WRONLY;
+
+	flags &= O_ACCMODE;
+	if ((flags & O_RDWR) == O_RDWR)
+		return CEPH_FILE_MODE_RDWR;
+	if ((flags & O_WRONLY) == O_WRONLY)
+		return CEPH_FILE_MODE_WR;
+	return CEPH_FILE_MODE_RD;
+}
+
+int ceph_caps_for_mode(int mode)
+{
+	switch (mode) {
+	case CEPH_FILE_MODE_PIN:
+		return CEPH_CAP_PIN;
+	case CEPH_FILE_MODE_RD:
+		return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED |
+			CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
+	case CEPH_FILE_MODE_RDWR:
+		return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED |
+			CEPH_CAP_FILE_EXCL |
+			CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE |
+			CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
+			CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
+			CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
+	case CEPH_FILE_MODE_WR:
+		return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED |
+			CEPH_CAP_FILE_EXCL |
+			CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
+			CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
+			CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
+	}
+	return 0;
+}
+
+/* Name hashing routines. Initial hash value */
+/* Hash courtesy of the R5 hash in reiserfs modulo sign bits */
+#define ceph_init_name_hash()		0
+
+/* partial hash update function. Assume roughly 4 bits per character */
+static unsigned long ceph_partial_name_hash(unsigned long c,
+					    unsigned long prevhash)
+{
+	return (prevhash + (c << 4) + (c >> 4)) * 11;
+}
+
+/*
+ * Finally: cut down the number of bits to a int value (and try to avoid
+ * losing bits)
+ */
+static unsigned long ceph_end_name_hash(unsigned long hash)
+{
+	return hash & 0xffffffff;
+}
+
+/* Compute the hash for a name string. */
+unsigned int ceph_full_name_hash(const char *name, unsigned int len)
+{
+	unsigned long hash = ceph_init_name_hash();
+	while (len--)
+		hash = ceph_partial_name_hash(*name++, hash);
+	return ceph_end_name_hash(hash);
+}
+