From a66d861291457e9b339756f57b1f3fe3e4b8a14f Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Thu, 29 Mar 2018 13:48:35 +0200 Subject: fs: tftp: Switch to dentry cache implementation Signed-off-by: Sascha Hauer --- fs/tftp.c | 97 ++++++++++++++++++++++++++++++++++++--------------------------- 1 file changed, 55 insertions(+), 42 deletions(-) (limited to 'fs/tftp.c') diff --git a/fs/tftp.c b/fs/tftp.c index 847921aa56..cc30c5eb8f 100644 --- a/fs/tftp.c +++ b/fs/tftp.c @@ -89,26 +89,6 @@ struct tftp_priv { IPaddr_t server; }; -static int tftp_create(struct device_d *dev, const char *pathname, mode_t mode) -{ - return 0; -} - -static int tftp_unlink(struct device_d *dev, const char *pathname) -{ - return -ENOSYS; -} - -static int tftp_mkdir(struct device_d *dev, const char *pathname) -{ - return -ENOSYS; -} - -static int tftp_rmdir(struct device_d *dev, const char *pathname) -{ - return -ENOSYS; -} - static int tftp_truncate(struct device_d *dev, FILE *f, ulong size) { return 0; @@ -466,6 +446,9 @@ out: static int tftp_open(struct device_d *dev, FILE *file, const char *filename) { struct file_priv *priv; + struct fs_device_d *fsdev = dev_to_fs_device(dev); + + filename = dpath(file->dentry, fsdev->vfsmount.mnt_root); priv = tftp_do_open(dev, file->flags, filename); if (IS_ERR(priv)) @@ -618,40 +601,76 @@ out_free: return -ENOSYS; } -static DIR* tftp_opendir(struct device_d *dev, const char *pathname) +static const struct inode_operations tftp_file_inode_operations; +static const struct inode_operations tftp_dir_inode_operations; +static const struct file_operations tftp_file_operations; + +static struct inode *tftp_get_inode(struct super_block *sb, const struct inode *dir, + umode_t mode) { - /* not implemented in tftp protocol */ - return NULL; + struct inode *inode = new_inode(sb); + + if (!inode) + return NULL; + + inode->i_ino = get_next_ino(); + inode->i_mode = mode; + inode->i_size = FILE_SIZE_STREAM; + + switch (mode & S_IFMT) { + default: + return NULL; + case S_IFREG: + inode->i_op = &tftp_file_inode_operations; + inode->i_fop = &tftp_file_operations; + break; + case S_IFDIR: + inode->i_op = &tftp_dir_inode_operations; + inode->i_fop = &simple_dir_operations; + inc_nlink(inode); + break; + } + + return inode; } -static int tftp_stat(struct device_d *dev, const char *filename, struct stat *s) +static struct dentry *tftp_lookup(struct inode *dir, struct dentry *dentry, + unsigned int flags) { - struct file_priv *priv; - - priv = tftp_do_open(dev, O_RDONLY, filename); - if (IS_ERR(priv)) - return PTR_ERR(priv); + struct inode *inode; - s->st_mode = S_IFREG | S_IRWXU | S_IRWXG | S_IRWXO; - if (priv->filesize) - s->st_size = priv->filesize; - else - s->st_size = FILESIZE_MAX; + inode = tftp_get_inode(dir->i_sb, dir, S_IFREG | S_IRWXUGO); + if (!inode) + return ERR_PTR(-ENOSPC); - tftp_do_close(priv); + d_add(dentry, inode); - return 0; + return NULL; } +static const struct inode_operations tftp_dir_inode_operations = +{ + .lookup = tftp_lookup, +}; + +static const struct super_operations tftp_ops; + static int tftp_probe(struct device_d *dev) { struct fs_device_d *fsdev = dev_to_fs_device(dev); struct tftp_priv *priv = xzalloc(sizeof(struct tftp_priv)); + struct super_block *sb = &fsdev->sb; + struct inode *inode; dev->priv = priv; priv->server = resolv(fsdev->backingstore); + sb->s_op = &tftp_ops; + + inode = tftp_get_inode(sb, NULL, S_IFDIR); + sb->s_root = d_make_root(inode); + return 0; } @@ -667,12 +686,6 @@ static struct fs_driver_d tftp_driver = { .close = tftp_close, .read = tftp_read, .lseek = tftp_lseek, - .opendir = tftp_opendir, - .stat = tftp_stat, - .create = tftp_create, - .unlink = tftp_unlink, - .mkdir = tftp_mkdir, - .rmdir = tftp_rmdir, .write = tftp_write, .truncate = tftp_truncate, .flags = 0, -- cgit v1.2.3