Staging: Pohmelfs: Extend remount option.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c
index 00570d9..3fef09f 100644
--- a/drivers/staging/pohmelfs/inode.c
+++ b/drivers/staging/pohmelfs/inode.c
@@ -1169,16 +1169,17 @@
static int pohmelfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
{
struct inode *inode = dentry->d_inode;
+#if 0
struct pohmelfs_inode *pi = POHMELFS_I(inode);
int err;
-#if 0
+
err = pohmelfs_data_lock(pi, 0, ~0, POHMELFS_READ_LOCK);
if (err)
return err;
-#endif
dprintk("%s: ino: %llu, mode: %o, uid: %u, gid: %u, size: %llu.\n",
__func__, pi->ino, inode->i_mode, inode->i_uid,
inode->i_gid, inode->i_size);
+#endif
generic_fillattr(inode, stat);
return 0;
@@ -1346,12 +1347,6 @@
pohmelfs_ftrans_exit();
}
-static int pohmelfs_remount(struct super_block *sb, int *flags, char *data)
-{
- *flags |= MS_RDONLY;
- return 0;
-}
-
static int pohmelfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
@@ -1394,42 +1389,33 @@
return 0;
}
-static const struct super_operations pohmelfs_sb_ops = {
- .alloc_inode = pohmelfs_alloc_inode,
- .destroy_inode = pohmelfs_destroy_inode,
- .drop_inode = pohmelfs_drop_inode,
- .write_inode = pohmelfs_write_inode,
- .put_super = pohmelfs_put_super,
- .remount_fs = pohmelfs_remount,
- .statfs = pohmelfs_statfs,
- .show_options = pohmelfs_show_options,
-};
-
enum {
pohmelfs_opt_idx,
+ pohmelfs_opt_crypto_thread_num,
+ pohmelfs_opt_trans_max_pages,
+ pohmelfs_opt_crypto_fail_unsupported,
+
+ /* Remountable options */
pohmelfs_opt_trans_scan_timeout,
pohmelfs_opt_drop_scan_timeout,
pohmelfs_opt_wait_on_page_timeout,
pohmelfs_opt_trans_retries,
- pohmelfs_opt_crypto_thread_num,
- pohmelfs_opt_trans_max_pages,
- pohmelfs_opt_crypto_fail_unsupported,
pohmelfs_opt_mcache_timeout,
};
static struct match_token pohmelfs_tokens[] = {
{pohmelfs_opt_idx, "idx=%u"},
+ {pohmelfs_opt_crypto_thread_num, "crypto_thread_num=%u"},
+ {pohmelfs_opt_trans_max_pages, "trans_max_pages=%u"},
+ {pohmelfs_opt_crypto_fail_unsupported, "crypto_fail_unsupported"},
{pohmelfs_opt_trans_scan_timeout, "trans_scan_timeout=%u"},
{pohmelfs_opt_drop_scan_timeout, "drop_scan_timeout=%u"},
{pohmelfs_opt_wait_on_page_timeout, "wait_on_page_timeout=%u"},
{pohmelfs_opt_trans_retries, "trans_retries=%u"},
- {pohmelfs_opt_crypto_thread_num, "crypto_thread_num=%u"},
- {pohmelfs_opt_trans_max_pages, "trans_max_pages=%u"},
- {pohmelfs_opt_crypto_fail_unsupported, "crypto_fail_unsupported"},
{pohmelfs_opt_mcache_timeout, "mcache_timeout=%u"},
};
-static int pohmelfs_parse_options(char *options, struct pohmelfs_sb *psb)
+static int pohmelfs_parse_options(char *options, struct pohmelfs_sb *psb, int remount)
{
char *p;
substring_t args[MAX_OPT_ARGS];
@@ -1449,6 +1435,9 @@
if (err)
return err;
+ if (remount && token <= pohmelfs_opt_crypto_fail_unsupported)
+ continue;
+
switch (token) {
case pohmelfs_opt_idx:
psb->idx = option;
@@ -1485,6 +1474,25 @@
return 0;
}
+static int pohmelfs_remount(struct super_block *sb, int *flags, char *data)
+{
+ int err;
+ struct pohmelfs_sb *psb = POHMELFS_SB(sb);
+ unsigned long old_sb_flags = sb->s_flags;
+
+ err = pohmelfs_parse_options(data, psb, 1);
+ if (err)
+ goto err_out_restore;
+
+ if (!(*flags & MS_RDONLY))
+ sb->s_flags &= ~MS_RDONLY;
+ return 0;
+
+err_out_restore:
+ sb->s_flags = old_sb_flags;
+ return err;
+}
+
static void pohmelfs_flush_inode(struct pohmelfs_inode *pi, unsigned int count)
{
struct inode *inode = &pi->vfs_inode;
@@ -1753,6 +1761,17 @@
return err;
}
+static const struct super_operations pohmelfs_sb_ops = {
+ .alloc_inode = pohmelfs_alloc_inode,
+ .destroy_inode = pohmelfs_destroy_inode,
+ .drop_inode = pohmelfs_drop_inode,
+ .write_inode = pohmelfs_write_inode,
+ .put_super = pohmelfs_put_super,
+ .remount_fs = pohmelfs_remount,
+ .statfs = pohmelfs_statfs,
+ .show_options = pohmelfs_show_options,
+};
+
/*
* Allocate private superblock and create root dir.
*/
@@ -1816,7 +1835,7 @@
mutex_init(&psb->state_lock);
INIT_LIST_HEAD(&psb->state_list);
- err = pohmelfs_parse_options((char *) data, psb);
+ err = pohmelfs_parse_options((char *) data, psb, 0);
if (err)
goto err_out_free_sb;
