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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-26 16:00:37 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-26 16:00:37 -0300
commit35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (patch)
tree281fc9db2a40c54ee94dc88fc2bf8c119cfafc15 /fs/exfat/exfat_super.h
parentf3a16ba6a1152b8966dcadc668af4cf00623c7b1 (diff)
Add support for the exFAT file system, fix hangs on older intel hardware and update AUFSpck-4.3.3-gnu
Diffstat (limited to 'fs/exfat/exfat_super.h')
-rw-r--r--fs/exfat/exfat_super.h171
1 files changed, 171 insertions, 0 deletions
diff --git a/fs/exfat/exfat_super.h b/fs/exfat/exfat_super.h
new file mode 100644
index 000000000..916811e3d
--- /dev/null
+++ b/fs/exfat/exfat_super.h
@@ -0,0 +1,171 @@
+/* Some of the source code in this file came from "linux/fs/fat/fat.h". */
+
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _EXFAT_LINUX_H
+#define _EXFAT_LINUX_H
+
+#include <linux/buffer_head.h>
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include <linux/swap.h>
+
+#include "exfat_config.h"
+#include "exfat_data.h"
+#include "exfat_oal.h"
+
+#include "exfat_blkdev.h"
+#include "exfat_cache.h"
+#include "exfat_nls.h"
+#include "exfat_api.h"
+#include "exfat_core.h"
+
+#define EXFAT_ERRORS_CONT 1 /* ignore error and continue */
+#define EXFAT_ERRORS_PANIC 2 /* panic on error */
+#define EXFAT_ERRORS_RO 3 /* remount r/o on error */
+
+/* ioctl command */
+#define EXFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32)
+
+struct exfat_mount_options {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0)
+ kuid_t fs_uid;
+ kgid_t fs_gid;
+#else
+ uid_t fs_uid;
+ gid_t fs_gid;
+#endif
+ unsigned short fs_fmask;
+ unsigned short fs_dmask;
+ unsigned short allow_utime; /* permission for setting the [am]time */
+ unsigned short codepage; /* codepage for shortname conversions */
+ char *iocharset; /* charset for filename input/display */
+ unsigned char casesensitive;
+ unsigned char errors; /* on error: continue, panic, remount-ro */
+#ifdef CONFIG_EXFAT_DISCARD
+ unsigned char discard; /* flag on if -o dicard specified and device support discard() */
+#endif /* CONFIG_EXFAT_DISCARD */
+};
+
+#define EXFAT_HASH_BITS 8
+#define EXFAT_HASH_SIZE (1UL << EXFAT_HASH_BITS)
+
+/*
+ * EXFAT file system in-core superblock data
+ */
+struct exfat_sb_info {
+ FS_INFO_T fs_info;
+ BD_INFO_T bd_info;
+
+ struct exfat_mount_options options;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,00)
+ int s_dirt;
+ struct mutex s_lock;
+#endif
+ struct nls_table *nls_disk; /* Codepage used on disk */
+ struct nls_table *nls_io; /* Charset used for input and display */
+
+ struct inode *fat_inode;
+
+ spinlock_t inode_hash_lock;
+ struct hlist_head inode_hashtable[EXFAT_HASH_SIZE];
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ long debug_flags;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+};
+
+/*
+ * EXFAT file system inode data in memory
+ */
+struct exfat_inode_info {
+ FILE_ID_T fid;
+ char *target;
+ /* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */
+ loff_t mmu_private; /* physically allocated size */
+ loff_t i_pos; /* on-disk position of directory entry or 0 */
+ struct hlist_node i_hash_fat; /* hash by i_location */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,00)
+ struct rw_semaphore truncate_lock;
+#endif
+ struct inode vfs_inode;
+ struct rw_semaphore i_alloc_sem; /* protect bmap against truncate */
+};
+
+#define EXFAT_SB(sb) ((struct exfat_sb_info *)((sb)->s_fs_info))
+
+static inline struct exfat_inode_info *EXFAT_I(struct inode *inode)
+{
+ return container_of(inode, struct exfat_inode_info, vfs_inode);
+}
+
+/*
+ * If ->i_mode can't hold S_IWUGO (i.e. ATTR_RO), we use ->i_attrs to
+ * save ATTR_RO instead of ->i_mode.
+ *
+ * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only
+ * bit, it's just used as flag for app.
+ */
+static inline int exfat_mode_can_hold_ro(struct inode *inode)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+
+ if (S_ISDIR(inode->i_mode))
+ return 0;
+
+ if ((~sbi->options.fs_fmask) & S_IWUGO)
+ return 1;
+ return 0;
+}
+
+/* Convert attribute bits and a mask to the UNIX mode. */
+static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi,
+ u32 attr, mode_t mode)
+{
+ if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR))
+ mode &= ~S_IWUGO;
+
+ if (attr & ATTR_SUBDIR)
+ return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
+ else if (attr & ATTR_SYMLINK)
+ return (mode & ~sbi->options.fs_dmask) | S_IFLNK;
+ else
+ return (mode & ~sbi->options.fs_fmask) | S_IFREG;
+}
+
+/* Return the FAT attribute byte for this inode */
+static inline u32 exfat_make_attr(struct inode *inode)
+{
+ if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & S_IWUGO))
+ return (EXFAT_I(inode)->fid.attr) | ATTR_READONLY;
+ else
+ return EXFAT_I(inode)->fid.attr;
+}
+
+static inline void exfat_save_attr(struct inode *inode, u32 attr)
+{
+ if (exfat_mode_can_hold_ro(inode))
+ EXFAT_I(inode)->fid.attr = attr & ATTR_RWMASK;
+ else
+ EXFAT_I(inode)->fid.attr = attr & (ATTR_RWMASK | ATTR_READONLY);
+}
+
+#endif /* _EXFAT_LINUX_H */