return 0;
if (iblock != MSDOS_I(inode)->mmu_private >> sb->s_blocksize_bits) {
- fat_fs_panic(sb, "corrupted file size (i_pos %lld, %lld)",
+ fat_fs_error(sb, "corrupted file size (i_pos %lld, %lld)",
MSDOS_I(inode)->i_pos, MSDOS_I(inode)->mmu_private);
return -EIO;
}
sector_t blocknr;
/* fat_get_cluster() assumes the requested blocknr isn't truncated. */
- mutex_lock(&mapping->host->i_mutex);
+ down_read(&mapping->host->i_alloc_sem);
blocknr = generic_block_bmap(mapping, block, fat_get_block);
- mutex_unlock(&mapping->host->i_mutex);
+ up_read(&mapping->host->i_alloc_sem);
return blocknr;
}
static void fat_write_super(struct super_block *sb)
{
+ lock_super(sb);
sb->s_dirt = 0;
if (!(sb->s_flags & MS_RDONLY))
fat_clusters_flush(sb);
+ unlock_super(sb);
+}
+
+static int fat_sync_fs(struct super_block *sb, int wait)
+{
+ int err = 0;
+
+ if (sb->s_dirt) {
+ lock_super(sb);
+ sb->s_dirt = 0;
+ err = fat_clusters_flush(sb);
+ unlock_super(sb);
+ }
+
+ return err;
}
static void fat_put_super(struct super_block *sb)
{
struct msdos_sb_info *sbi = MSDOS_SB(sb);
- if (sbi->nls_disk) {
- unload_nls(sbi->nls_disk);
- sbi->nls_disk = NULL;
- sbi->options.codepage = fat_default_codepage;
- }
- if (sbi->nls_io) {
- unload_nls(sbi->nls_io);
- sbi->nls_io = NULL;
- }
- if (sbi->options.iocharset != fat_default_iocharset) {
+ lock_kernel();
+
+ if (sb->s_dirt)
+ fat_write_super(sb);
+
+ iput(sbi->fat_inode);
+
+ unload_nls(sbi->nls_disk);
+ unload_nls(sbi->nls_io);
+
+ if (sbi->options.iocharset != fat_default_iocharset)
kfree(sbi->options.iocharset);
- sbi->options.iocharset = fat_default_iocharset;
- }
sb->s_fs_info = NULL;
kfree(sbi);
+
+ unlock_kernel();
}
static struct kmem_cache *fat_inode_cachep;
static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
{
- struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
+ struct super_block *sb = dentry->d_sb;
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
+ u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
/* If the count of free cluster is still unknown, counts it here. */
if (sbi->free_clusters == -1 || !sbi->free_clus_valid) {
buf->f_blocks = sbi->max_cluster - FAT_START_ENT;
buf->f_bfree = sbi->free_clusters;
buf->f_bavail = sbi->free_clusters;
+ buf->f_fsid.val[0] = (u32)id;
+ buf->f_fsid.val[1] = (u32)(id >> 32);
buf->f_namelen = sbi->options.isvfat ? 260 : 12;
return 0;
}
+static inline loff_t fat_i_pos_read(struct msdos_sb_info *sbi,
+ struct inode *inode)
+{
+ loff_t i_pos;
+#if BITS_PER_LONG == 32
+ spin_lock(&sbi->inode_hash_lock);
+#endif
+ i_pos = MSDOS_I(inode)->i_pos;
+#if BITS_PER_LONG == 32
+ spin_unlock(&sbi->inode_hash_lock);
+#endif
+ return i_pos;
+}
+
static int fat_write_inode(struct inode *inode, int wait)
{
struct super_block *sb = inode->i_sb;
loff_t i_pos;
int err;
+ if (inode->i_ino == MSDOS_ROOT_INO)
+ return 0;
+
retry:
- i_pos = MSDOS_I(inode)->i_pos;
- if (inode->i_ino == MSDOS_ROOT_INO || !i_pos)
+ i_pos = fat_i_pos_read(sbi, inode);
+ if (!i_pos)
return 0;
bh = sb_bread(sb, i_pos >> sbi->dir_per_block_bits);
.delete_inode = fat_delete_inode,
.put_super = fat_put_super,
.write_super = fat_write_super,
+ .sync_fs = fat_sync_fs,
.statfs = fat_statfs,
.clear_inode = fat_clear_inode,
.remount_fs = fat_remount,
brelse(bh);
parent = d_obtain_alias(inode);
+ if (!IS_ERR(parent))
+ parent->d_op = sb->s_root->d_op;
out:
unlock_super(sb);
seq_puts(m, ",shortname=mixed");
break;
case VFAT_SFN_DISPLAY_LOWER | VFAT_SFN_CREATE_WIN95:
- /* seq_puts(m, ",shortname=lower"); */
+ seq_puts(m, ",shortname=lower");
break;
default:
seq_puts(m, ",shortname=unknown");
seq_puts(m, ",flush");
if (opts->tz_utc)
seq_puts(m, ",tz=UTC");
+ if (opts->errors == FAT_ERRORS_CONT)
+ seq_puts(m, ",errors=continue");
+ else if (opts->errors == FAT_ERRORS_PANIC)
+ seq_puts(m, ",errors=panic");
+ else
+ seq_puts(m, ",errors=remount-ro");
return 0;
}
Opt_charset, Opt_shortname_lower, Opt_shortname_win95,
Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
- Opt_obsolate, Opt_flush, Opt_tz_utc, Opt_rodir, Opt_err,
+ Opt_obsolate, Opt_flush, Opt_tz_utc, Opt_rodir, Opt_err_cont,
+ Opt_err_panic, Opt_err_ro, Opt_err,
};
static const match_table_t fat_tokens = {
{Opt_showexec, "showexec"},
{Opt_debug, "debug"},
{Opt_immutable, "sys_immutable"},
+ {Opt_flush, "flush"},
+ {Opt_tz_utc, "tz=UTC"},
+ {Opt_err_cont, "errors=continue"},
+ {Opt_err_panic, "errors=panic"},
+ {Opt_err_ro, "errors=remount-ro"},
{Opt_obsolate, "conv=binary"},
{Opt_obsolate, "conv=text"},
{Opt_obsolate, "conv=auto"},
{Opt_obsolate, "cvf_format=%20s"},
{Opt_obsolate, "cvf_options=%100s"},
{Opt_obsolate, "posix"},
- {Opt_flush, "flush"},
- {Opt_tz_utc, "tz=UTC"},
{Opt_err, NULL},
};
static const match_table_t msdos_tokens = {
opts->isvfat = is_vfat;
- opts->fs_uid = current->uid;
- opts->fs_gid = current->gid;
- opts->fs_fmask = opts->fs_dmask = current->fs->umask;
+ opts->fs_uid = current_uid();
+ opts->fs_gid = current_gid();
+ opts->fs_fmask = opts->fs_dmask = current_umask();
opts->allow_utime = -1;
opts->codepage = fat_default_codepage;
opts->iocharset = fat_default_iocharset;
if (is_vfat) {
- opts->shortname = VFAT_SFN_DISPLAY_LOWER|VFAT_SFN_CREATE_WIN95;
+ opts->shortname = VFAT_SFN_DISPLAY_WINNT|VFAT_SFN_CREATE_WIN95;
opts->rodir = 0;
} else {
opts->shortname = 0;
opts->numtail = 1;
opts->usefree = opts->nocase = 0;
opts->tz_utc = 0;
+ opts->errors = FAT_ERRORS_RO;
*debug = 0;
if (!options)
case Opt_tz_utc:
opts->tz_utc = 1;
break;
+ case Opt_err_cont:
+ opts->errors = FAT_ERRORS_CONT;
+ break;
+ case Opt_err_panic:
+ opts->errors = FAT_ERRORS_PANIC;
+ break;
+ case Opt_err_ro:
+ opts->errors = FAT_ERRORS_RO;
+ break;
/* msdos specific */
case Opt_dots:
int fat_fill_super(struct super_block *sb, void *data, int silent,
const struct inode_operations *fs_dir_inode_ops, int isvfat)
{
- struct inode *root_inode = NULL;
+ struct inode *root_inode = NULL, *fat_inode = NULL;
struct buffer_head *bh;
struct fat_boot_sector *b;
struct msdos_sb_info *sbi;
}
error = -ENOMEM;
+ fat_inode = new_inode(sb);
+ if (!fat_inode)
+ goto out_fail;
+ MSDOS_I(fat_inode)->i_pos = 0;
+ sbi->fat_inode = fat_inode;
root_inode = new_inode(sb);
if (!root_inode)
goto out_fail;
" on dev %s.\n", sb->s_id);
out_fail:
+ if (fat_inode)
+ iput(fat_inode);
if (root_inode)
iput(root_inode);
if (sbi->nls_io)