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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 | /* * drivers/scsi/sd_ioctl.c * * ioctl handling for SCSI disks */ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/fs.h> #include <linux/hdreg.h> #include <linux/errno.h> #include <asm/segment.h> #include <linux/blk.h> #include "scsi.h" #include <scsi/scsi_ioctl.h> #include "hosts.h" #include "sd.h" #include <scsi/scsicam.h> /* must follow "hosts.h" */ int sd_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg) { kdev_t dev = inode->i_rdev; int error; struct Scsi_Host * host; int diskinfo[4]; struct hd_geometry *loc = (struct hd_geometry *) arg; switch (cmd) { case HDIO_GETGEO: /* Return BIOS disk parameters */ if (!loc) return -EINVAL; error = verify_area(VERIFY_WRITE, loc, sizeof(*loc)); if (error) return error; host = rscsi_disks[MINOR(dev) >> 4].device->host; /* default to most commonly used values */ diskinfo[0] = 0x40; diskinfo[1] = 0x20; diskinfo[2] = rscsi_disks[MINOR(dev) >> 4].capacity >> 11; /* override with calculated, extended default, or driver values */ if(host->hostt->bios_param != NULL) host->hostt->bios_param(&rscsi_disks[MINOR(dev) >> 4], dev, &diskinfo[0]); else scsicam_bios_param(&rscsi_disks[MINOR(dev) >> 4], dev, &diskinfo[0]); put_user(diskinfo[0], &loc->heads); put_user(diskinfo[1], &loc->sectors); put_user(diskinfo[2], &loc->cylinders); put_user(sd[MINOR(inode->i_rdev)].start_sect, &loc->start); return 0; case BLKGETSIZE: /* Return device size */ if (!arg) return -EINVAL; error = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long)); if (error) return error; put_user(sd[MINOR(inode->i_rdev)].nr_sects, (long *) arg); return 0; case BLKRASET: if (!suser()) return -EACCES; if(!(inode->i_rdev)) return -EINVAL; if(arg > 0xff) return -EINVAL; read_ahead[MAJOR(inode->i_rdev)] = arg; return 0; case BLKRAGET: if (!arg) return -EINVAL; error = verify_area(VERIFY_WRITE, (int *) arg, sizeof(int)); if (error) return error; put_user(read_ahead[MAJOR(inode->i_rdev)], (int *) arg); return 0; case BLKFLSBUF: if(!suser()) return -EACCES; if(!(inode->i_rdev)) return -EINVAL; fsync_dev(inode->i_rdev); invalidate_buffers(inode->i_rdev); return 0; case BLKRRPART: /* Re-read partition tables */ return revalidate_scsidisk(dev, 1); default: return scsi_ioctl(rscsi_disks[MINOR(dev) >> 4].device , cmd, (void *) arg); } } /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only. This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-indent-level: 4 * c-brace-imaginary-offset: 0 * c-brace-offset: -4 * c-argdecl-indent: 4 * c-label-offset: -4 * c-continued-statement-offset: 4 * c-continued-brace-offset: 0 * indent-tabs-mode: nil * tab-width: 8 * End: */ |