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Annotation of qemu/roms/openbios/fs/ext2/ext2_mount.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *
        !             3:  * (c) 2008-2009 Laurent Vivier <[email protected]>
        !             4:  *
        !             5:  * This file has been copied from EMILE, http://emile.sf.net
        !             6:  *
        !             7:  */
        !             8: 
        !             9: #include "libext2.h"
        !            10: #include "ext2.h"
        !            11: #include "ext2_utils.h"
        !            12: 
        !            13: #define SB_OFFSET (2)
        !            14: 
        !            15: ext2_VOLUME* ext2_mount(int fd)
        !            16: {
        !            17:        ext2_VOLUME *volume;
        !            18:        struct ext2_super_block *super;
        !            19:        char *buffer;
        !            20: 
        !            21:        super = (struct ext2_super_block*)malloc(sizeof(struct ext2_super_block));
        !            22:        if (super == NULL)
        !            23:                return NULL;
        !            24: 
        !            25:        ext2_get_super(fd, super);
        !            26:        if (super->s_magic != EXT2_SUPER_MAGIC) {
        !            27:                free(super);
        !            28:                return NULL;
        !            29:        }
        !            30: 
        !            31:        buffer = (char*)malloc(EXT2_BLOCK_SIZE(super));
        !            32:        if (buffer == NULL) {
        !            33:                free(super);
        !            34:                return NULL;
        !            35:        }
        !            36: 
        !            37:        volume = (ext2_VOLUME*)malloc(sizeof(ext2_VOLUME));
        !            38:        if (volume == NULL) {
        !            39:                free(super);
        !            40:                free(buffer);
        !            41:                return NULL;
        !            42:        }
        !            43: 
        !            44:        volume->buffer = buffer;
        !            45:        volume->fd = fd;
        !            46:        volume->super = super;
        !            47: 
        !            48:        volume->current = -1;
        !            49:        ext2_read_block(volume, 0);
        !            50: 
        !            51:        return volume;
        !            52: }
        !            53: 
        !            54: int ext2_umount(ext2_VOLUME* volume)
        !            55: {
        !            56:        if (volume == NULL)
        !            57:                return -1;
        !            58:        free(volume->super);
        !            59:        free(volume->buffer);
        !            60:        free(volume);
        !            61:        return 0;
        !            62: }

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