82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
#include <kernel/fs/vfs.h>
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#include <kernel/fs/stat.h>
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#include <kernel/util/atomic.h>
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#include <lib/string.h>
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/* gevice_get() - Find internal device */
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struct device *device_get(dev_t major)
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{
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extern uint32_t bdevice_section;
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extern uint32_t edevice_section;
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struct device *device;
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int i;
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i = -1;
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device = (void *)&bdevice_section;
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while ((uint32_t)&device[++i] < (uint32_t)&edevice_section)
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{
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if (device[i].major == major)
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return (&device[i]);
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}
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return (NULL);
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}
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/* vfs_mknod - Create VFS inode (file, device special file, or pipe) named pathname */
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int vfs_mknod(const char *pathname, mode_t mode, dev_t dev)
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{
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extern struct dentry *vfs_root_node;
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struct dentry *parent_dentry;
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struct device *device;
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struct dentry *file;
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char *name;
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// Check device
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// TODO: remove me !
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if (dev == 0)
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return (-2);
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// Start atomic operations
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atomic_start();
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// Get parent dentry
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parent_dentry = vfs_dentry_resolve(pathname, VFS_DENTRY_RESOLVE_FLAG_PATHNAME);
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if (parent_dentry == NULL) {
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atomic_stop();
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return (-1);
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}
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// Get folder name
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name = strrchr(pathname, '/');
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name = (name == NULL) ? (void *)pathname : &name[1];
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// Try to find the device
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// TODO: handle other file (mode) !!!
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device = device_get(dev_get_major(dev));
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if (device == NULL) {
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atomic_stop();
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return (-2);
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}
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// Try to create empty node
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file = vfs_dentry_alloc(name, mode | __S_IFCHR);
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if (file == NULL) {
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atomic_stop();
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return (-3);
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}
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// Indicate device file
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file->inode = NULL;
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file->device = device;
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file->dev_id = dev;
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// Set file operations
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file->dentry_op.file_op = &device->file_op;
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// Add file into VFS
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file->parent = parent_dentry;
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file->next = parent_dentry->child;
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parent_dentry->child = file;
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atomic_stop();
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return (0);
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}
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