X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fvfs_compat.h;h=17fa3ff7bd38f9f5fecdd4a98d7a4b4e73fa869d;hb=refs%2Fheads%2Frertzinger%2Ffeature-zpool-get--p;hp=1d8a523cd999082edc2650d93ec7de4000c61a1e;hpb=b312979252c5b566d2f59febcda67f309637e18c;p=zfs.git

diff --git a/include/linux/vfs_compat.h b/include/linux/vfs_compat.h
index 1d8a523..17fa3ff 100644
--- a/include/linux/vfs_compat.h
+++ b/include/linux/vfs_compat.h
@@ -62,4 +62,116 @@ truncate_setsize(struct inode *ip, loff_t new)
 }
 #endif /* HAVE_TRUNCATE_SETSIZE */
 
+#if defined(HAVE_BDI) && !defined(HAVE_BDI_SETUP_AND_REGISTER)
+/*
+ * 2.6.34 API change,
+ * Add bdi_setup_and_register() function if not yet provided by kernel.
+ * It is used to quickly initialize and register a BDI for the filesystem.
+ */
+extern atomic_long_t zfs_bdi_seq;
+
+static inline int
+bdi_setup_and_register(struct backing_dev_info *bdi,char *name,unsigned int cap)
+{
+	char tmp[32];
+	int error;
+
+	bdi->name = name;
+	bdi->capabilities = cap;
+	error = bdi_init(bdi);
+	if (error)
+		return (error);
+
+	sprintf(tmp, "%.28s%s", name, "-%d");
+	error = bdi_register(bdi, NULL, tmp,
+	    atomic_long_inc_return(&zfs_bdi_seq));
+	if (error) {
+		bdi_destroy(bdi);
+		return (error);
+	}
+
+	return (error);
+}
+#endif /* HAVE_BDI && !HAVE_BDI_SETUP_AND_REGISTER */
+
+/*
+ * 2.6.38 API change,
+ * LOOKUP_RCU flag introduced to distinguish rcu-walk from ref-walk cases.
+ */
+#ifndef LOOKUP_RCU
+#define LOOKUP_RCU      0x0
+#endif /* LOOKUP_RCU */
+
+/*
+ * 3.2-rc1 API change,
+ * Add set_nlink() if it is not exported by the Linux kernel.
+ *
+ * i_nlink is read-only in Linux 3.2, but it can be set directly in
+ * earlier kernels.
+ */
+#ifndef HAVE_SET_NLINK
+static inline void
+set_nlink(struct inode *inode, unsigned int nlink)
+{
+	inode->i_nlink = nlink;
+}
+#endif /* HAVE_SET_NLINK */
+
+/*
+ * 3.3 API change,
+ * The VFS .create, .mkdir and .mknod callbacks were updated to take a
+ * umode_t type rather than an int.  To cleanly handle both definitions
+ * the zpl_umode_t type is introduced and set accordingly.
+ */
+#ifdef HAVE_MKDIR_UMODE_T
+typedef	umode_t		zpl_umode_t;
+#else
+typedef	int		zpl_umode_t;
+#endif
+
+/*
+ * 3.5 API change,
+ * The clear_inode() function replaces end_writeback() and introduces an
+ * ordering change regarding when the inode_sync_wait() occurs.  See the
+ * configure check in config/kernel-clear-inode.m4 for full details.
+ */
+#if defined(HAVE_EVICT_INODE) && !defined(HAVE_CLEAR_INODE)
+#define clear_inode(ip)		end_writeback(ip)
+#endif /* HAVE_EVICT_INODE && !HAVE_CLEAR_INODE */
+
+/*
+ * 3.6 API change,
+ * The sget() helper function now takes the mount flags as an argument.
+ */
+#ifdef HAVE_5ARG_SGET
+#define zpl_sget(type, cmp, set, fl, mtd)	sget(type, cmp, set, fl, mtd)
+#else
+#define zpl_sget(type, cmp, set, fl, mtd)	sget(type, cmp, set, mtd)
+#endif /* HAVE_5ARG_SGET */
+
+#define ZFS_IOC_GETFLAGS	FS_IOC_GETFLAGS
+#define ZFS_IOC_SETFLAGS	FS_IOC_SETFLAGS
+
+#if defined(SEEK_HOLE) && defined(SEEK_DATA) && !defined(HAVE_LSEEK_EXECUTE)
+static inline loff_t
+lseek_execute(struct file *filp, struct inode *inode,
+	      loff_t offset, loff_t maxsize)
+{
+	if (offset < 0 && !(filp->f_mode & FMODE_UNSIGNED_OFFSET))
+		return (-EINVAL);
+
+	if (offset > maxsize)
+		return (-EINVAL);
+
+	if (offset != filp->f_pos) {
+		spin_lock(&filp->f_lock);
+		filp->f_pos = offset;
+		filp->f_version = 0;
+		spin_unlock(&filp->f_lock);
+	}
+
+	return (offset);
+}
+#endif /* SEEK_HOLE && SEEK_DATA && !HAVE_LSEEK_EXECUTE */
+
 #endif /* _ZFS_VFS_H */