From 70ae314d8709a97468b99448456afed0f2ef589a Mon Sep 17 00:00:00 2001
From: Greg Farnum <gfarnum@redhat.com>
Date: Wed, 4 Feb 2015 15:03:21 -0800
Subject: [PATCH] client: fix O_PATH on older Linux systems

O_PATH was introduced in 2.6.39, but many Linux systems in use
today still have older kernels than that. Check for them.

Signed-off-by: Greg Farnum <gfarnum@redhat.com>
---
 src/client/Client.cc       | 20 ++++++++++----------
 src/test/libcephfs/test.cc |  2 +-
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/client/Client.cc b/src/client/Client.cc
index adf87a0b9791f..1c305510a7162 100644
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -5587,7 +5587,7 @@ int Client::fchmod(int fd, mode_t mode)
   Fh *f = get_filehandle(fd);
   if (!f)
     return -EBADF;
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (f->flags & O_PATH)
     return -EBADF;
 #endif
@@ -5644,7 +5644,7 @@ int Client::fchown(int fd, int uid, int gid)
   Fh *f = get_filehandle(fd);
   if (!f)
     return -EBADF;
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (f->flags & O_PATH)
     return -EBADF;
 #endif
@@ -6383,7 +6383,7 @@ int Client::open(const char *relpath, int flags, mode_t mode, int stripe_unit,
 
   Fh *fh = NULL;
 
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   /* When the O_PATH is being specified, others flags than O_DIRECTORY
    * and O_NOFOLLOW are ignored. Please refer do_entry_open() function
    * in kernel (fs/open.c). */
@@ -6401,7 +6401,7 @@ int Client::open(const char *relpath, int flags, mode_t mode, int stripe_unit,
   if (r == 0 && (flags & O_CREAT) && (flags & O_EXCL))
     return -EEXIST;
 
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (r == 0 && in->is_symlink() && (flags & O_NOFOLLOW) && !(flags & O_PATH))
 #else
   if (r == 0 && in->is_symlink() && (flags & O_NOFOLLOW))
@@ -6720,7 +6720,7 @@ loff_t Client::lseek(int fd, loff_t offset, int whence)
   Fh *f = get_filehandle(fd);
   if (!f)
     return -EBADF;
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (f->flags & O_PATH)
     return -EBADF;
 #endif
@@ -6843,7 +6843,7 @@ int Client::read(int fd, char *buf, loff_t size, loff_t offset)
   Fh *f = get_filehandle(fd);
   if (!f)
     return -EBADF;
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (f->flags & O_PATH)
     return -EBADF;
 #endif
@@ -7168,7 +7168,7 @@ int Client::write(int fd, const char *buf, loff_t size, loff_t offset)
   Fh *fh = get_filehandle(fd);
   if (!fh)
     return -EBADF;
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (fh->flags & O_PATH)
     return -EBADF;
 #endif
@@ -7417,7 +7417,7 @@ int Client::ftruncate(int fd, loff_t length)
   Fh *f = get_filehandle(fd);
   if (!f)
     return -EBADF;
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (f->flags & O_PATH)
     return -EBADF;
 #endif
@@ -7436,7 +7436,7 @@ int Client::fsync(int fd, bool syncdataonly)
   Fh *f = get_filehandle(fd);
   if (!f)
     return -EBADF;
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (f->flags & O_PATH)
     return -EBADF;
 #endif
@@ -10024,7 +10024,7 @@ int Client::fallocate(int fd, int mode, loff_t offset, loff_t length)
   Fh *fh = get_filehandle(fd);
   if (!fh)
     return -EBADF;
-#if defined(__linux__)
+#if defined(__linux__) && defined(O_PATH)
   if (fh->flags & O_PATH)
     return -EBADF;
 #endif
diff --git a/src/test/libcephfs/test.cc b/src/test/libcephfs/test.cc
index a607a1bd8270a..a4209de46954e 100644
--- a/src/test/libcephfs/test.cc
+++ b/src/test/libcephfs/test.cc
@@ -658,7 +658,7 @@ TEST(LibCephFS, Fchown) {
   ceph_shutdown(cmount);
 }
 
-#ifdef __linux__
+#if defined(__linux__) && defined(O_PATH)
 TEST(LibCephFS, FlagO_PATH) {
   struct ceph_mount_info *cmount;
 
-- 
2.39.5