FAT: add 'errors' mount option

On severe errors FAT remounts itself in read-only mode. Allow to
specify FAT fs desired behavior through 'errors' mount option:
panic, continue or remount read-only.

`mount -t [fat|vfat] -o errors=[panic,remount-ro,continue] \
	<bdev> <mount point>`

This is analog to ext2 fs 'errors' mount option.

Signed-off-by: Denis Karpov <ext-denis.2.karpov@nokia.com>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index ea440d65819c..ed10896d5da5 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -17,6 +17,10 @@
 #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;
@@ -26,6 +30,7 @@ struct fat_mount_options {
         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 */
@@ -310,7 +315,7 @@ extern int fat_fill_super(struct super_block *sb, void *data, int silent,
 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);