diff options
| -rw-r--r-- | fs/hostfs/hostfs_kern.c | 39 |
1 files changed, 15 insertions, 24 deletions
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index fab5f5a1e6f..7e6750499b8 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -19,7 +19,6 @@ #include "kern.h" struct hostfs_inode_info { - char *host_filename; int fd; fmode_t mode; struct inode vfs_inode; @@ -103,7 +102,7 @@ static char *dentry_name(struct dentry *dentry, int extra) parent = parent->d_parent; } - root = HOSTFS_I(parent->d_inode)->host_filename; + root = parent->d_sb->s_fs_info; len += strlen(root); name = kmalloc(len + extra + 1, GFP_KERNEL); if (name == NULL) @@ -266,7 +265,7 @@ int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf) long long f_files; long long f_ffree; - err = do_statfs(HOSTFS_I(dentry->d_sb->s_root->d_inode)->host_filename, + err = do_statfs(dentry->d_sb->s_fs_info, &sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files, &f_ffree, &sf->f_fsid, sizeof(sf->f_fsid), &sf->f_namelen, sf->f_spare); @@ -285,13 +284,10 @@ static struct inode *hostfs_alloc_inode(struct super_block *sb) { struct hostfs_inode_info *hi; - hi = kmalloc(sizeof(*hi), GFP_KERNEL); + hi = kzalloc(sizeof(*hi), GFP_KERNEL); if (hi == NULL) return NULL; - - *hi = ((struct hostfs_inode_info) { .host_filename = NULL, - .fd = -1, - .mode = 0 }); + hi->fd = -1; inode_init_once(&hi->vfs_inode); return &hi->vfs_inode; } @@ -308,14 +304,12 @@ static void hostfs_evict_inode(struct inode *inode) static void hostfs_destroy_inode(struct inode *inode) { - kfree(HOSTFS_I(inode)->host_filename); kfree(HOSTFS_I(inode)); } static int hostfs_show_options(struct seq_file *seq, struct vfsmount *vfs) { - struct inode *root = vfs->mnt_sb->s_root->d_inode; - const char *root_path = HOSTFS_I(root)->host_filename; + const char *root_path = vfs->mnt_sb->s_fs_info; size_t offset = strlen(root_ino) + 1; if (strlen(root_path) > offset) @@ -978,8 +972,8 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent) req_root = ""; err = -ENOMEM; - host_root_path = kmalloc(strlen(root_ino) + 1 - + strlen(req_root) + 1, GFP_KERNEL); + sb->s_fs_info = host_root_path = + kmalloc(strlen(root_ino) + strlen(req_root) + 2, GFP_KERNEL); if (host_root_path == NULL) goto out; @@ -988,20 +982,13 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent) root_inode = hostfs_iget(sb); if (IS_ERR(root_inode)) { err = PTR_ERR(root_inode); - goto out_free; + goto out; } err = init_inode(root_inode, NULL); if (err) goto out_put; - HOSTFS_I(root_inode)->host_filename = host_root_path; - /* - * Avoid that in the error path, iput(root_inode) frees again - * host_root_path through hostfs_destroy_inode! - */ - host_root_path = NULL; - err = -ENOMEM; sb->s_root = d_alloc_root(root_inode); if (sb->s_root == NULL) @@ -1019,8 +1006,6 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent) out_put: iput(root_inode); -out_free: - kfree(host_root_path); out: return err; } @@ -1032,11 +1017,17 @@ static int hostfs_read_sb(struct file_system_type *type, return get_sb_nodev(type, flags, data, hostfs_fill_sb_common, mnt); } +static void hostfs_kill_sb(struct super_block *s) +{ + kill_anon_super(s); + kfree(s->s_fs_info); +} + static struct file_system_type hostfs_type = { .owner = THIS_MODULE, .name = "hostfs", .get_sb = hostfs_read_sb, - .kill_sb = kill_anon_super, + .kill_sb = hostfs_kill_sb, .fs_flags = 0, }; |