From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 5.mo3.mail-out.ovh.net ([87.98.178.36] helo=mo3.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1U6g4i-0001a7-Lo for barebox@lists.infradead.org; Sat, 16 Feb 2013 11:37:01 +0000 Received: from mail642.ha.ovh.net (b6.ovh.net [213.186.33.56]) by mo3.mail-out.ovh.net (Postfix) with SMTP id BE22FFF8732 for ; Sat, 16 Feb 2013 12:51:51 +0100 (CET) From: Jean-Christophe PLAGNIOL-VILLARD Date: Sat, 16 Feb 2013 12:35:53 +0100 Message-Id: <1361014553-24489-1-git-send-email-plagnioj@jcrosoft.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/1] devfs: add symlink support To: barebox@lists.infradead.org Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- fs/devfs.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/driver.h | 1 + 2 files changed, 71 insertions(+) diff --git a/fs/devfs.c b/fs/devfs.c index f089c6f..c0047e3 100644 --- a/fs/devfs.c +++ b/fs/devfs.c @@ -216,6 +216,12 @@ static int devfs_stat(struct device_d *_dev, const char *filename, struct stat * if (!cdev) return -ENOENT; + if (cdev->symlink) { + s->st_mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO; + s->st_size = strlen(cdev->symlink); + return 0; + } + s->st_mode = S_IFCHR; s->st_size = cdev->size; if (cdev->ops->write) @@ -235,7 +241,69 @@ static void devfs_delete(struct device_d *dev) { } +static int devfs_symlink(struct device_d *dev, const char *pathname, + const char *newpath) +{ + struct cdev *cdev; + int ret = -ENOMEM; + + cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); + if (!cdev) + return -ENOMEM; + + cdev->symlink = strdup(pathname); + if (!cdev->symlink) + goto err; + + cdev->name = strdup(newpath + 1); + if (!cdev->name) + goto err_cdev; + + ret = devfs_create(cdev); + if (ret) + goto err_create; + + return 0; + +err_create: + kfree(cdev->name); +err_cdev: + kfree(cdev->symlink); +err: + kfree(cdev); + return ret; +} + +static int devfs_readlink(struct device_d *dev, const char *pathname, + char *buf, size_t bufsiz) +{ + struct cdev *cdev; + int len; + + cdev = cdev_by_name(pathname + 1); + if (!cdev || !cdev->symlink) + return -ENOENT; + + len = min(bufsiz, strlen(cdev->symlink)); + + memcpy(buf, cdev->symlink, len); + + return 0; +} + +static int devfs_unlink(struct device_d *dev, const char *pathname) +{ + struct cdev *cdev; + + cdev = cdev_by_name(pathname + 1); + if (!cdev || !cdev->symlink) + return -EPERM; + + return devfs_remove(cdev); +} + static struct fs_driver_d devfs_driver = { + .unlink = devfs_unlink, .read = devfs_read, .write = devfs_write, .lseek = devfs_lseek, @@ -248,6 +316,8 @@ static struct fs_driver_d devfs_driver = { .truncate = devfs_truncate, .closedir = devfs_closedir, .stat = devfs_stat, + .symlink = devfs_symlink, + .readlink = devfs_readlink, .erase = devfs_erase, .protect = devfs_protect, .memmap = devfs_memmap, diff --git a/include/driver.h b/include/driver.h index 151829e..1b0e619 100644 --- a/include/driver.h +++ b/include/driver.h @@ -432,6 +432,7 @@ struct cdev { loff_t size; unsigned int flags; int open; + char *symlink; struct mtd_info *mtd; }; -- 1.7.10.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox