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path: root/drivers/block/pktcdvd.c
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Diffstat (limited to 'drivers/block/pktcdvd.c')
-rw-r--r--drivers/block/pktcdvd.c139
1 files changed, 60 insertions, 79 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 4e7dbcc425ff69..bc9b2bcd7dba71 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -58,6 +58,7 @@
#include <linux/suspend.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_ioctl.h>
+#include <scsi/scsi.h>
#include <asm/uaccess.h>
@@ -380,6 +381,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
memcpy(rq->cmd, cgc->cmd, CDROM_PACKET_SIZE);
if (sizeof(rq->cmd) > CDROM_PACKET_SIZE)
memset(rq->cmd + CDROM_PACKET_SIZE, 0, sizeof(rq->cmd) - CDROM_PACKET_SIZE);
+ rq->cmd_len = COMMAND_SIZE(rq->cmd[0]);
rq->ref_count++;
rq->flags |= REQ_NOMERGE;
@@ -645,7 +647,7 @@ static void pkt_copy_bio_data(struct bio *src_bio, int seg, int offs, struct pag
* b) The data can be used as cache to avoid read requests if we receive a
* new write request for the same zone.
*/
-static void pkt_make_local_copy(struct packet_data *pkt, struct page **pages, int *offsets)
+static void pkt_make_local_copy(struct packet_data *pkt, struct bio_vec *bvec)
{
int f, p, offs;
@@ -653,15 +655,15 @@ static void pkt_make_local_copy(struct packet_data *pkt, struct page **pages, in
p = 0;
offs = 0;
for (f = 0; f < pkt->frames; f++) {
- if (pages[f] != pkt->pages[p]) {
- void *vfrom = kmap_atomic(pages[f], KM_USER0) + offsets[f];
+ if (bvec[f].bv_page != pkt->pages[p]) {
+ void *vfrom = kmap_atomic(bvec[f].bv_page, KM_USER0) + bvec[f].bv_offset;
void *vto = page_address(pkt->pages[p]) + offs;
memcpy(vto, vfrom, CD_FRAMESIZE);
kunmap_atomic(vfrom, KM_USER0);
- pages[f] = pkt->pages[p];
- offsets[f] = offs;
+ bvec[f].bv_page = pkt->pages[p];
+ bvec[f].bv_offset = offs;
} else {
- BUG_ON(offsets[f] != offs);
+ BUG_ON(bvec[f].bv_offset != offs);
}
offs += CD_FRAMESIZE;
if (offs >= PAGE_SIZE) {
@@ -991,18 +993,17 @@ try_next_bio:
static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
{
struct bio *bio;
- struct page *pages[PACKET_MAX_SIZE];
- int offsets[PACKET_MAX_SIZE];
int f;
int frames_write;
+ struct bio_vec *bvec = pkt->w_bio->bi_io_vec;
for (f = 0; f < pkt->frames; f++) {
- pages[f] = pkt->pages[(f * CD_FRAMESIZE) / PAGE_SIZE];
- offsets[f] = (f * CD_FRAMESIZE) % PAGE_SIZE;
+ bvec[f].bv_page = pkt->pages[(f * CD_FRAMESIZE) / PAGE_SIZE];
+ bvec[f].bv_offset = (f * CD_FRAMESIZE) % PAGE_SIZE;
}
/*
- * Fill-in pages[] and offsets[] with data from orig_bios.
+ * Fill-in bvec with data from orig_bios.
*/
frames_write = 0;
spin_lock(&pkt->lock);
@@ -1024,11 +1025,11 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
}
if (src_bvl->bv_len - src_offs >= CD_FRAMESIZE) {
- pages[f] = src_bvl->bv_page;
- offsets[f] = src_bvl->bv_offset + src_offs;
+ bvec[f].bv_page = src_bvl->bv_page;
+ bvec[f].bv_offset = src_bvl->bv_offset + src_offs;
} else {
pkt_copy_bio_data(bio, segment, src_offs,
- pages[f], offsets[f]);
+ bvec[f].bv_page, bvec[f].bv_offset);
}
src_offs += CD_FRAMESIZE;
frames_write++;
@@ -1042,7 +1043,7 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
BUG_ON(frames_write != pkt->write_size);
if (test_bit(PACKET_MERGE_SEGS, &pd->flags) || (pkt->write_size < pkt->frames)) {
- pkt_make_local_copy(pkt, pages, offsets);
+ pkt_make_local_copy(pkt, bvec);
pkt->cache_valid = 1;
} else {
pkt->cache_valid = 0;
@@ -1055,17 +1056,9 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
pkt->w_bio->bi_bdev = pd->bdev;
pkt->w_bio->bi_end_io = pkt_end_io_packet_write;
pkt->w_bio->bi_private = pkt;
- for (f = 0; f < pkt->frames; f++) {
- if ((f + 1 < pkt->frames) && (pages[f + 1] == pages[f]) &&
- (offsets[f + 1] = offsets[f] + CD_FRAMESIZE)) {
- if (!bio_add_page(pkt->w_bio, pages[f], CD_FRAMESIZE * 2, offsets[f]))
- BUG();
- f++;
- } else {
- if (!bio_add_page(pkt->w_bio, pages[f], CD_FRAMESIZE, offsets[f]))
- BUG();
- }
- }
+ for (f = 0; f < pkt->frames; f++)
+ if (!bio_add_page(pkt->w_bio, bvec[f].bv_page, CD_FRAMESIZE, bvec[f].bv_offset))
+ BUG();
VPRINTK("pktcdvd: vcnt=%d\n", pkt->w_bio->bi_vcnt);
atomic_set(&pkt->io_wait, 1);
@@ -1504,40 +1497,42 @@ static int pkt_set_write_settings(struct pktcdvd_device *pd)
}
/*
- * 0 -- we can write to this track, 1 -- we can't
+ * 1 -- we can write to this track, 0 -- we can't
*/
-static int pkt_good_track(track_information *ti)
+static int pkt_writable_track(struct pktcdvd_device *pd, track_information *ti)
{
- /*
- * only good for CD-RW at the moment, not DVD-RW
- */
+ switch (pd->mmc3_profile) {
+ case 0x1a: /* DVD+RW */
+ case 0x12: /* DVD-RAM */
+ /* The track is always writable on DVD+RW/DVD-RAM */
+ return 1;
+ default:
+ break;
+ }
- /*
- * FIXME: only for FP
- */
- if (ti->fp == 0)
+ if (!ti->packet || !ti->fp)
return 0;
/*
* "good" settings as per Mt Fuji.
*/
- if (ti->rt == 0 && ti->blank == 0 && ti->packet == 1)
- return 0;
+ if (ti->rt == 0 && ti->blank == 0)
+ return 1;
- if (ti->rt == 0 && ti->blank == 1 && ti->packet == 1)
- return 0;
+ if (ti->rt == 0 && ti->blank == 1)
+ return 1;
- if (ti->rt == 1 && ti->blank == 0 && ti->packet == 1)
- return 0;
+ if (ti->rt == 1 && ti->blank == 0)
+ return 1;
printk("pktcdvd: bad state %d-%d-%d\n", ti->rt, ti->blank, ti->packet);
- return 1;
+ return 0;
}
/*
- * 0 -- we can write to this disc, 1 -- we can't
+ * 1 -- we can write to this disc, 0 -- we can't
*/
-static int pkt_good_disc(struct pktcdvd_device *pd, disc_information *di)
+static int pkt_writable_disc(struct pktcdvd_device *pd, disc_information *di)
{
switch (pd->mmc3_profile) {
case 0x0a: /* CD-RW */
@@ -1546,10 +1541,10 @@ static int pkt_good_disc(struct pktcdvd_device *pd, disc_information *di)
case 0x1a: /* DVD+RW */
case 0x13: /* DVD-RW */
case 0x12: /* DVD-RAM */
- return 0;
- default:
- printk("pktcdvd: Wrong disc profile (%x)\n", pd->mmc3_profile);
return 1;
+ default:
+ VPRINTK("pktcdvd: Wrong disc profile (%x)\n", pd->mmc3_profile);
+ return 0;
}
/*
@@ -1558,25 +1553,25 @@ static int pkt_good_disc(struct pktcdvd_device *pd, disc_information *di)
*/
if (di->disc_type == 0xff) {
printk("pktcdvd: Unknown disc. No track?\n");
- return 1;
+ return 0;
}
if (di->disc_type != 0x20 && di->disc_type != 0) {
printk("pktcdvd: Wrong disc type (%x)\n", di->disc_type);
- return 1;
+ return 0;
}
if (di->erasable == 0) {
printk("pktcdvd: Disc not erasable\n");
- return 1;
+ return 0;
}
if (di->border_status == PACKET_SESSION_RESERVED) {
printk("pktcdvd: Can't write to last track (reserved)\n");
- return 1;
+ return 0;
}
- return 0;
+ return 1;
}
static int pkt_probe_settings(struct pktcdvd_device *pd)
@@ -1601,23 +1596,9 @@ static int pkt_probe_settings(struct pktcdvd_device *pd)
return ret;
}
- if (pkt_good_disc(pd, &di))
- return -ENXIO;
+ if (!pkt_writable_disc(pd, &di))
+ return -EROFS;
- switch (pd->mmc3_profile) {
- case 0x1a: /* DVD+RW */
- printk("pktcdvd: inserted media is DVD+RW\n");
- break;
- case 0x13: /* DVD-RW */
- printk("pktcdvd: inserted media is DVD-RW\n");
- break;
- case 0x12: /* DVD-RAM */
- printk("pktcdvd: inserted media is DVD-RAM\n");
- break;
- default:
- printk("pktcdvd: inserted media is CD-R%s\n", di.erasable ? "W" : "");
- break;
- }
pd->type = di.erasable ? PACKET_CDRW : PACKET_CDR;
track = 1; /* (di.last_track_msb << 8) | di.last_track_lsb; */
@@ -1626,9 +1607,9 @@ static int pkt_probe_settings(struct pktcdvd_device *pd)
return ret;
}
- if (pkt_good_track(&ti)) {
+ if (!pkt_writable_track(pd, &ti)) {
printk("pktcdvd: can't write to this track\n");
- return -ENXIO;
+ return -EROFS;
}
/*
@@ -1642,7 +1623,7 @@ static int pkt_probe_settings(struct pktcdvd_device *pd)
}
if (pd->settings.size > PACKET_MAX_SECTORS) {
printk("pktcdvd: packet size is too big\n");
- return -ENXIO;
+ return -EROFS;
}
pd->settings.fp = ti.fp;
pd->offset = (be32_to_cpu(ti.track_start) << 2) & (pd->settings.size - 1);
@@ -1684,7 +1665,7 @@ static int pkt_probe_settings(struct pktcdvd_device *pd)
break;
default:
printk("pktcdvd: unknown data mode\n");
- return 1;
+ return -EROFS;
}
return 0;
}
@@ -1894,8 +1875,8 @@ static int pkt_open_write(struct pktcdvd_device *pd)
unsigned int write_speed, media_write_speed, read_speed;
if ((ret = pkt_probe_settings(pd))) {
- DPRINTK("pktcdvd: %s failed probe\n", pd->name);
- return -EIO;
+ VPRINTK("pktcdvd: %s failed probe\n", pd->name);
+ return ret;
}
if ((ret = pkt_set_write_settings(pd))) {
@@ -2053,10 +2034,9 @@ static int pkt_open(struct inode *inode, struct file *file)
goto out_dec;
}
} else {
- if (pkt_open_dev(pd, file->f_mode & FMODE_WRITE)) {
- ret = -EIO;
+ ret = pkt_open_dev(pd, file->f_mode & FMODE_WRITE);
+ if (ret)
goto out_dec;
- }
/*
* needed here as well, since ext2 (among others) may change
* the blocksize at mount time
@@ -2436,11 +2416,12 @@ static int pkt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, u
* The door gets locked when the device is opened, so we
* have to unlock it or else the eject command fails.
*/
- pkt_lock_door(pd, 0);
+ if (pd->refcnt == 1)
+ pkt_lock_door(pd, 0);
return blkdev_ioctl(pd->bdev->bd_inode, file, cmd, arg);
default:
- printk("pktcdvd: Unknown ioctl for %s (%x)\n", pd->name, cmd);
+ VPRINTK("pktcdvd: Unknown ioctl for %s (%x)\n", pd->name, cmd);
return -ENOTTY;
}
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-14 07:46:42 +0000