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Staging: Pohmelfs: Extend remount option. 

Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Evgeniy Polyakov 2009-03-27 15:04:23 +03:00 committed by Greg Kroah-Hartman
parent 872dc5e500
commit e504342448
1 changed files with 46 additions and 27 deletions
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73
drivers/staging/pohmelfs/inode.c
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@ -1169,16 +1169,17 @@ err_out_put:
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 @@ static void pohmelfs_put_super(struct super_block *sb)
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 @@ static int pohmelfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
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 @@ static int pohmelfs_parse_options(char *options, struct pohmelfs_sb *psb)
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 @@ static int pohmelfs_parse_options(char *options, struct pohmelfs_sb *psb)
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 @@ err_out_exit:
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 @@ static int pohmelfs_fill_super(struct super_block *sb, void *data, int silent)
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;