C++ (Cpp) lookup_sfs_nolock Examples

Example #1

File: sfs_inode.c Project: LearningOS/ucore_extension_on_thinpad-2016

int
sfs_load_inode(struct sfs_fs *sfs, struct inode **node_store, uint32_t ino) {
    // while (1);
    lock_sfs_fs(sfs);
    struct inode *node;
    if ((node = lookup_sfs_nolock(sfs, ino)) != NULL) {
        goto out_unlock;
    }

    int ret = -E_NO_MEM;
    struct sfs_disk_inode *din;
    if ((din = kmalloc(sizeof(struct sfs_disk_inode))) == NULL) {
        goto failed_unlock;
    }

    // kprintf("in %s: ino is %d\n", __func__, ino);
    // while (1);

    // kprintf("%s\n", __func__);
    assert(sfs_block_inuse(sfs, ino));
    if ((ret = sfs_rbuf(sfs, din, sizeof(struct sfs_disk_inode), ino, 0)) != 0) {
        goto failed_cleanup_din;
    }

    assert(_SFS_INODE_GET_NLINKS(din) != 0);
    if ((ret = sfs_create_inode(sfs, din, ino, &node)) != 0) {
        goto failed_cleanup_din;
    }
    sfs_set_links(sfs, vop_info(node, sfs_inode));

out_unlock:
    unlock_sfs_fs(sfs);
    *node_store = node;
    return 0;

failed_cleanup_din:
    kfree(din);
failed_unlock:
    unlock_sfs_fs(sfs);
    return ret;
}

Example #2

File: sfs_inode.c Project: Aureate-Sunshine/ucore

/*
 * sfs_load_inode - If the inode isn't existed, load inode related ino disk block data into a new created inode.
 *                  If the inode is in memory alreadily, then do nothing
 */
int
sfs_load_inode(struct sfs_fs *sfs, struct inode **node_store, uint32_t ino) {
    lock_sfs_fs(sfs);
    struct inode *node;
    if ((node = lookup_sfs_nolock(sfs, ino)) != NULL) {
        goto out_unlock;
    }

    int ret = -E_NO_MEM;
    struct sfs_disk_inode *din;
    if ((din = kmalloc(sizeof(struct sfs_disk_inode))) == NULL) {
        goto failed_unlock;
    }

    assert(sfs_block_inuse(sfs, ino));
    if ((ret = sfs_rbuf(sfs, din, sizeof(struct sfs_disk_inode), ino, 0)) != 0) {
        goto failed_cleanup_din;
    }

    assert(din->nlinks != 0);
    if ((ret = sfs_create_inode(sfs, din, ino, &node)) != 0) {
        goto failed_cleanup_din;
    }
    sfs_set_links(sfs, vop_info(node, sfs_inode));

out_unlock:
    unlock_sfs_fs(sfs);
    *node_store = node;
    return 0;

failed_cleanup_din:
    kfree(din);
failed_unlock:
    unlock_sfs_fs(sfs);
    return ret;
}