*/
#include <klibc/string.h>
-#include <lunaix/dirent.h>
#include <lunaix/foptions.h>
#include <lunaix/fs.h>
#include <lunaix/mm/cake.h>
#include <lunaix/process.h>
#include <lunaix/spike.h>
#include <lunaix/syscall.h>
+#include <lunaix/syscall_utils.h>
#include <lunaix/fs/twifs.h>
+#include <sys/dirent_defs.h>
+
static struct cake_pile* dnode_pile;
static struct cake_pile* inode_pile;
static struct cake_pile* file_pile;
atomic_fetch_add(&vfs_sysroot->ref_count, 1);
}
-inline struct hbucket*
-__dcache_hash(struct v_dnode* parent, uint32_t* hash)
+static inline struct hbucket*
+__dcache_hash(struct v_dnode* parent, u32_t* hash)
{
- uint32_t _hash = *hash;
+ u32_t _hash = *hash;
// 确保低位更加随机
_hash = _hash ^ (_hash >> VFS_HASHBITS);
// 与parent的指针值做加法，来减小碰撞的可能性。
- _hash += (uint32_t)parent;
+ _hash += (u32_t)parent;
*hash = _hash;
return &dnode_cache[_hash & VFS_HASH_MASK];
}
return parent->parent;
}
- uint32_t hash = str->hash;
+ u32_t hash = str->hash;
struct hbucket* slot = __dcache_hash(parent, &hash);
struct v_dnode *pos, *n;
atomic_fetch_sub(&file->dnode->ref_count, 1);
file->inode->open_count--;
- // Prevent dead lock.
- // This happened when process is terminated while blocking on read.
- // In that case, the process is still holding the inode lock and it will
- // never get released.
/*
+ * Prevent dead lock.
+ * This happened when process is terminated while blocking on read.
+ * In that case, the process is still holding the inode lock and it
+ will never get released.
* The unlocking should also include ownership check.
*
* To see why, consider two process both open the same file both with
return vfs_pclose(file, __current->pid);
}
+void
+vfs_free_fd(struct v_fd* fd)
+{
+ cake_release(fd_pile, fd);
+}
+
int
vfs_fsync(struct v_file* file)
{
vfs_dcache_remove(pos);
}
- vfree(dnode->name.value);
+ vfree((void*)dnode->name.value);
cake_release(dnode_pile, dnode);
}
struct v_inode*
-vfs_i_find(struct v_superblock* sb, uint32_t i_id)
+vfs_i_find(struct v_superblock* sb, u32_t i_id)
{
struct hbucket* slot = &sb->i_cache[i_id & VFS_HASH_MASK];
struct v_inode *pos, *n;
inode->atime = inode->ctime;
inode->mtime = inode->ctime;
-done:
lru_use_one(inode_lru, &inode->lru);
return inode;
}
pcache_release(inode->pg_cache);
vfree(inode->pg_cache);
}
- inode->ops->sync(inode);
+ // we don't need to sync inode.
+ // If an inode can be free, then it must be properly closed.
+ // Hence it must be synced already!
+ if (inode->destruct) {
+ inode->destruct(inode);
+ }
hlist_delete(&inode->hash_list);
cake_release(inode_pile, inode);
}
/* ---- System call definition and support ---- */
#define FLOCATE_CREATE_EMPTY 1
+#define FLOCATE_CREATE_ONLY 2
int
vfs_getfd(int fd, struct v_fd** fd_s)
}
errno = vfs_walk(*fdir, name.value, file, NULL, 0);
- if (errno != ENOENT || !(options & FLOCATE_CREATE_EMPTY)) {
+
+ if (errno != ENOENT && (options & FLOCATE_CREATE_ONLY)) {
+ return EEXIST;
+ }
+
+ if (errno != ENOENT ||
+ !(options & (FLOCATE_CREATE_EMPTY | FLOCATE_CREATE_ONLY))) {
return errno;
}
{
int errno, fd;
struct v_dnode *dentry, *file;
- struct v_file* ofile = 0;
+ struct v_file* ofile = NULL;
errno = __vfs_try_locate_file(
path, &dentry, &file, (options & FO_CREATE) ? FLOCATE_CREATE_EMPTY : 0);
- if (errno || (errno = vfs_open(file, &ofile))) {
- return errno;
- }
+ if (!errno && !(errno = vfs_alloc_fdslot(&fd))) {
- struct v_inode* o_inode = ofile->inode;
+ if (errno || (errno = vfs_open(file, &ofile))) {
+ return errno;
+ }
+
+ struct v_fd* fd_s = cake_grab(fd_pile);
+ memset(fd_s, 0, sizeof(*fd_s));
- if (!errno && !(errno = vfs_alloc_fdslot(&fd))) {
- struct v_fd* fd_s = vzalloc(sizeof(*fd_s));
ofile->f_pos = ofile->inode->fsize & -((options & FO_APPEND) != 0);
fd_s->file = ofile;
fd_s->flags = options;
goto done_err;
}
- vfree(fd_s);
+ cake_release(fd_pile, fd_s);
__current->fdtable->fds[fd] = 0;
done_err:
const int len,
const int dtype)
{
- struct dirent* dent = (struct dirent*)dctx->cb_data;
+ struct lx_dirent* dent = (struct lx_dirent*)dctx->cb_data;
strncpy(dent->d_name, name, DIRENT_NAME_MAX_LEN);
dent->d_nlen = len;
dent->d_type = dtype;
}
-__DEFINE_LXSYSCALL2(int, readdir, int, fd, struct dirent*, dent)
+__DEFINE_LXSYSCALL2(int, sys_readdir, int, fd, struct lx_dirent*, dent)
{
struct v_fd* fd_s;
int errno;
if (inode->open_count) {
errno = EBUSY;
} else if (!(inode->itype & VFS_IFDIR)) {
- // The underlying unlink implementation should handle
- // symlink case
errno = inode->ops->unlink(inode);
if (!errno) {
vfs_d_free(dnode);
errno = __vfs_try_locate_file(oldpath, &dentry, &to_link, 0);
if (!errno) {
errno = __vfs_try_locate_file(
- newpath, &name_dentry, &name_file, FLOCATE_CREATE_EMPTY);
+ newpath, &name_dentry, &name_file, FLOCATE_CREATE_ONLY);
if (!errno) {
- errno = EEXIST;
- } else if (name_file) {
errno = vfs_link(to_link, name_file);
}
}
link_target)
{
int errno;
- struct v_dnode* dnode;
- if ((errno = vfs_walk_proc(pathname, &dnode, NULL, 0))) {
+ struct v_dnode *dnode, *file;
+ if ((errno = __vfs_try_locate_file(
+ pathname, &dnode, &file, FLOCATE_CREATE_ONLY))) {
goto done;
}
- if (errno = vfs_check_writable(dnode)) {
+ if ((errno = vfs_check_writable(file))) {
goto done;
}
- if (!dnode->inode->ops->set_symlink) {
+ if (!file->inode->ops->set_symlink) {
errno = ENOTSUP;
goto done;
}
- lock_inode(dnode->inode);
+ lock_inode(file->inode);
- errno = dnode->inode->ops->set_symlink(dnode->inode, link_target);
+ errno = file->inode->ops->set_symlink(file->inode, link_target);
- unlock_inode(dnode->inode);
+ unlock_inode(file->inode);
done:
return DO_STATUS(errno);
}
+void
+vfs_ref_file(struct v_file* file)
+{
+ atomic_fetch_add(&file->ref_count, 1);
+}
+
void
vfs_ref_dnode(struct v_dnode* dnode)
{
goto done;
}
- errno = vfs_do_chdir(__current, dnode);
+ errno = vfs_do_chdir((struct proc_info*)__current, dnode);
done:
return DO_STATUS(errno);
goto done;
}
- errno = vfs_do_chdir(__current, fd_s->file->dnode);
+ errno = vfs_do_chdir((struct proc_info*)__current, fd_s->file->dnode);
done:
return DO_STATUS(errno);
}
}
- buf[len + 1] = '\0';
+ buf[len] = '\0';
ret_ptr = buf;
return 0;
}
- if (errno = vfs_check_writable(current)) {
+ if ((errno = vfs_check_writable(current))) {
return errno;
}
errno = vfs_do_rename(cur, target);
done:
- vfree(name.value);
+ vfree((void*)name.value);
return DO_STATUS(errno);
}
\ No newline at end of file
git://scm.lunaixsky.com / lunaix-os.git / blobdiff