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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/ceph/ceph_fs.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/net/ceph/ceph_fs.c')
-rw-r--r--kernel/net/ceph/ceph_fs.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/kernel/net/ceph/ceph_fs.c b/kernel/net/ceph/ceph_fs.c
new file mode 100644
index 000000000..41466ccb9
--- /dev/null
+++ b/kernel/net/ceph/ceph_fs.c
@@ -0,0 +1,78 @@
+/*
+ * Some non-inline ceph helpers
+ */
+#include <linux/module.h>
+#include <linux/ceph/types.h>
+
+/*
+ * return true if @layout appears to be valid
+ */
+int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
+{
+ __u32 su = le32_to_cpu(layout->fl_stripe_unit);
+ __u32 sc = le32_to_cpu(layout->fl_stripe_count);
+ __u32 os = le32_to_cpu(layout->fl_object_size);
+
+ /* stripe unit, object size must be non-zero, 64k increment */
+ if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
+ return 0;
+ if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
+ return 0;
+ /* object size must be a multiple of stripe unit */
+ if (os < su || os % su)
+ return 0;
+ /* stripe count must be non-zero */
+ if (!sc)
+ return 0;
+ return 1;
+}
+
+
+int ceph_flags_to_mode(int flags)
+{
+ int mode;
+
+#ifdef O_DIRECTORY /* fixme */
+ if ((flags & O_DIRECTORY) == O_DIRECTORY)
+ return CEPH_FILE_MODE_PIN;
+#endif
+
+ switch (flags & O_ACCMODE) {
+ case O_WRONLY:
+ mode = CEPH_FILE_MODE_WR;
+ break;
+ case O_RDONLY:
+ mode = CEPH_FILE_MODE_RD;
+ break;
+ case O_RDWR:
+ case O_ACCMODE: /* this is what the VFS does */
+ mode = CEPH_FILE_MODE_RDWR;
+ break;
+ }
+#ifdef O_LAZY
+ if (flags & O_LAZY)
+ mode |= CEPH_FILE_MODE_LAZY;
+#endif
+
+ return mode;
+}
+EXPORT_SYMBOL(ceph_flags_to_mode);
+
+int ceph_caps_for_mode(int mode)
+{
+ int caps = CEPH_CAP_PIN;
+
+ if (mode & CEPH_FILE_MODE_RD)
+ caps |= CEPH_CAP_FILE_SHARED |
+ CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
+ if (mode & CEPH_FILE_MODE_WR)
+ caps |= 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;
+ if (mode & CEPH_FILE_MODE_LAZY)
+ caps |= CEPH_CAP_FILE_LAZYIO;
+
+ return caps;
+}
+EXPORT_SYMBOL(ceph_caps_for_mode);