#define VFAT_SFN_CREATE_WIN95 0x0100 /* emulate win95 rule for create */
#define VFAT_SFN_CREATE_WINNT 0x0200 /* emulate winnt rule for create */
+#define FAT_ERRORS_CONT 1 /* ignore error and continue */
+#define FAT_ERRORS_PANIC 2 /* panic on error */
+#define FAT_ERRORS_RO 3 /* remount r/o on error */
+
struct fat_mount_options {
uid_t fs_uid;
gid_t fs_gid;
char *iocharset; /* Charset used for filename input/display */
unsigned short shortname; /* flags for shortname display/create rule */
unsigned char name_check; /* r = relaxed, n = normal, s = strict */
+ unsigned char errors; /* On error: continue, panic, remount-ro */
unsigned short allow_utime;/* permission for setting the [am]time */
unsigned quiet:1, /* set = fake successful chmods and chowns */
showexec:1, /* set = only set x bit for com/exe/bat */
flush:1, /* write things quickly */
nocase:1, /* Does this need case conversion? 0=need case conversion*/
usefree:1, /* Use free_clusters for FAT32 */
- tz_utc:1; /* Filesystem timestamps are in UTC */
+ tz_utc:1, /* Filesystem timestamps are in UTC */
+ rodir:1; /* allow ATTR_RO for directory */
};
#define FAT_HASH_BITS 8
/* for avoiding the race between fat_free() and fat_get_cluster() */
unsigned int cache_valid_id;
- loff_t mmu_private;
+ /* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */
+ loff_t mmu_private; /* physically allocated size */
+
int i_start; /* first cluster or 0 */
int i_logstart; /* logical first cluster */
int i_attrs; /* unused attribute bits */
return container_of(inode, struct msdos_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 fat_mode_can_hold_ro(struct inode *inode)
+{
+ struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
+ mode_t mask;
+
+ if (S_ISDIR(inode->i_mode)) {
+ if (!sbi->options.rodir)
+ return 0;
+ mask = ~sbi->options.fs_dmask;
+ } else
+ mask = ~sbi->options.fs_fmask;
+
+ if (!(mask & S_IWUGO))
+ return 0;
+ return 1;
+}
+
/* Convert attribute bits and a mask to the UNIX mode. */
static inline mode_t fat_make_mode(struct msdos_sb_info *sbi,
u8 attrs, mode_t mode)
{
- if (attrs & ATTR_RO)
+ if (attrs & ATTR_RO && !((attrs & ATTR_DIR) && !sbi->options.rodir))
mode &= ~S_IWUGO;
if (attrs & ATTR_DIR)
/* Return the FAT attribute byte for this inode */
static inline u8 fat_make_attrs(struct inode *inode)
{
- return ((inode->i_mode & S_IWUGO) ? ATTR_NONE : ATTR_RO) |
- (S_ISDIR(inode->i_mode) ? ATTR_DIR : ATTR_NONE) |
- MSDOS_I(inode)->i_attrs;
+ u8 attrs = MSDOS_I(inode)->i_attrs;
+ if (S_ISDIR(inode->i_mode))
+ attrs |= ATTR_DIR;
+ if (fat_mode_can_hold_ro(inode) && !(inode->i_mode & S_IWUGO))
+ attrs |= ATTR_RO;
+ return attrs;
}
static inline void fat_save_attrs(struct inode *inode, u8 attrs)
{
- MSDOS_I(inode)->i_attrs = attrs & ATTR_UNUSED;
+ if (fat_mode_can_hold_ro(inode))
+ MSDOS_I(inode)->i_attrs = attrs & ATTR_UNUSED;
+ else
+ MSDOS_I(inode)->i_attrs = attrs & (ATTR_UNUSED | ATTR_RO);
}
static inline unsigned char fat_checksum(const __u8 *name)
extern int fat_get_cluster(struct inode *inode, int cluster,
int *fclus, int *dclus);
extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys,
- unsigned long *mapped_blocks);
+ unsigned long *mapped_blocks, int create);
/* fat/dir.c */
extern const struct file_operations fat_dir_operations;
extern int fat_flush_inodes(struct super_block *sb, struct inode *i1,
struct inode *i2);
/* fat/misc.c */
-extern void fat_fs_panic(struct super_block *s, const char *fmt, ...);
+extern void fat_fs_error(struct super_block *s, const char *fmt, ...)
+ __attribute__ ((format (printf, 2, 3))) __cold;
extern void fat_clusters_flush(struct super_block *sb);
extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster);
extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts,
int fat_cache_init(void);
void fat_cache_destroy(void);
+/* helper for printk */
+typedef unsigned long long llu;
+
#endif /* !_FAT_H */