affs: add mount option to avoid filename truncates
Normal behavior for filenames exceeding specific filesystem limits is to
refuse operation.
AFFS standard name length being only 30 characters against 255 for usual
Linux filesystems, original implementation does filename truncate by
default with a define value AFFS_NO_TRUNCATE which can be enabled but
needs module compilation.
This patch adds 'nofilenametruncate' mount option so that user can
easily activate that feature and avoid a lot of problems (eg overwrite
files ...)
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 3952121..25b23b1 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -5,14 +5,6 @@
#include <linux/mutex.h>
#include <linux/workqueue.h>
-/* AmigaOS allows file names with up to 30 characters length.
- * Names longer than that will be silently truncated. If you
- * want to disallow this, comment out the following #define.
- * Creating filesystem objects with longer names will then
- * result in an error (ENAMETOOLONG).
- */
-/*#define AFFS_NO_TRUNCATE */
-
/* Ugly macros make the code more pretty. */
#define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
@@ -28,7 +20,6 @@
#define AFFS_CACHE_SIZE PAGE_SIZE
-#define AFFS_MAX_PREALLOC 32
#define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2)
#define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
#define AFFS_AC_MASK (AFFS_AC_SIZE-1)
@@ -118,6 +109,7 @@
#define SF_OFS 0x0200 /* Old filesystem */
#define SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
#define SF_VERBOSE 0x0800 /* Talk about fs when mounting */
+#define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */
/* short cut to get to the affs specific sb data */
static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
@@ -137,9 +129,13 @@
extern void secs_to_datestamp(time_t secs, struct affs_date *ds);
extern umode_t prot_to_mode(u32 prot);
extern void mode_to_prot(struct inode *inode);
-extern void affs_error(struct super_block *sb, const char *function, const char *fmt, ...);
-extern void affs_warning(struct super_block *sb, const char *function, const char *fmt, ...);
-extern int affs_check_name(const unsigned char *name, int len);
+extern void affs_error(struct super_block *sb, const char *function,
+ const char *fmt, ...);
+extern void affs_warning(struct super_block *sb, const char *function,
+ const char *fmt, ...);
+extern bool affs_nofilenametruncate(const struct dentry *dentry);
+extern int affs_check_name(const unsigned char *name, int len,
+ bool notruncate);
extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry);
/* bitmap. c */