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linux-elphel
Commit 8b4a20b4 authored by Andrey Filippov's avatar Andrey Filippov
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continue adding debug prints

parent f1301897
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Showing with 4118 additions and 89 deletions
src/block/bio.c
View file @ 8b4a20b4
...@@ -573,10 +573,12 @@ EXPORT_SYMBOL(bio_put); ...@@ -573,10 +573,12 @@ EXPORT_SYMBOL(bio_put);
inline int bio_phys_segments(struct request_queue *q, struct bio *bio) inline int bio_phys_segments(struct request_queue *q, struct bio *bio)
{ {
if (unlikely(!bio_flagged(bio, BIO_SEG_VALID))) if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
blk_recount_segments(q, bio); blk_recount_segments(q, bio);
if (bio->bi_disk && (bio->bi_disk->major == 8)) { // sda, sda*
return bio->bi_phys_segments; pr_debug(" *!* bio->bi_flags=0x%04x, bio->bi_phys_segments=0x%08x",bio->bi_flags, bio->bi_phys_segments);
}
return bio->bi_phys_segments;
} }
EXPORT_SYMBOL(bio_phys_segments); EXPORT_SYMBOL(bio_phys_segments);
...@@ -664,12 +666,12 @@ EXPORT_SYMBOL(bio_clone_fast); ...@@ -664,12 +666,12 @@ EXPORT_SYMBOL(bio_clone_fast);
int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page
*page, unsigned int len, unsigned int offset) *page, unsigned int len, unsigned int offset)
{ {
int retried_segments = 0; int retried_segments = 0;
struct bio_vec *bvec; struct bio_vec *bvec;
pr_debug(" *!*");
/* /*
* cloned bio must not modify vec list * cloned bio must not modify vec list
*/ */
if (unlikely(bio_flagged(bio, BIO_CLONED))) if (unlikely(bio_flagged(bio, BIO_CLONED)))
return 0; return 0;
...@@ -842,13 +844,13 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) ...@@ -842,13 +844,13 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
unsigned short nr_pages = bio->bi_max_vecs - bio->bi_vcnt, idx; unsigned short nr_pages = bio->bi_max_vecs - bio->bi_vcnt, idx;
struct bio_vec *bv = bio->bi_io_vec + bio->bi_vcnt; struct bio_vec *bv = bio->bi_io_vec + bio->bi_vcnt;
struct page **pages = (struct page **)bv; struct page **pages = (struct page **)bv;
size_t offset; size_t offset;
ssize_t size; ssize_t size;
size = iov_iter_get_pages(iter, pages, LONG_MAX, nr_pages, &offset); size = iov_iter_get_pages(iter, pages, LONG_MAX, nr_pages, &offset);
pr_debug("size = %d", size); // pr_debug("size = %d", size);
if (unlikely(size <= 0)) { if (unlikely(size <= 0)) {
pr_debug("size = %d <0, return -EFAULT", size); pr_debug("size = %d <0, return -EFAULT", size);
return size ? size : -EFAULT; return size ? size : -EFAULT;
} }
idx = nr_pages = (size + offset + PAGE_SIZE - 1) / PAGE_SIZE; idx = nr_pages = (size + offset + PAGE_SIZE - 1) / PAGE_SIZE;
...@@ -871,10 +873,12 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) ...@@ -871,10 +873,12 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
bv[0].bv_offset += offset; bv[0].bv_offset += offset;
bv[0].bv_len -= offset; bv[0].bv_len -= offset;
bv[nr_pages - 1].bv_len -= nr_pages * PAGE_SIZE - offset - size; bv[nr_pages - 1].bv_len -= nr_pages * PAGE_SIZE - offset - size;
iov_iter_advance(iter, size); iov_iter_advance(iter, size);
return 0; pr_debug("size = %d", size);
return 0;
} }
/** /**
...@@ -891,17 +895,16 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) ...@@ -891,17 +895,16 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
*/ */
int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
{ {
unsigned short orig_vcnt = bio->bi_vcnt; unsigned short orig_vcnt = bio->bi_vcnt;
pr_debug("ret = %d", orig_vcnt); do {
do { int ret = __bio_iov_iter_get_pages(bio, iter);
int ret = __bio_iov_iter_get_pages(bio, iter);
if (unlikely(ret)) if (unlikely(ret))
return bio->bi_vcnt > orig_vcnt ? 0 : ret; return bio->bi_vcnt > orig_vcnt ? 0 : ret;
} while (iov_iter_count(iter) && !bio_full(bio)); } while (iov_iter_count(iter) && !bio_full(bio));
pr_debug("orig_vcnt = %d, bio->bi_vcnt=%d", orig_vcnt, bio->bi_vcnt);
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(bio_iov_iter_get_pages); EXPORT_SYMBOL_GPL(bio_iov_iter_get_pages);
...@@ -1185,13 +1188,13 @@ struct bio *bio_copy_user_iov(struct request_queue *q, ...@@ -1185,13 +1188,13 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
struct page *page; struct page *page;
struct bio *bio; struct bio *bio;
int i = 0, ret; int i = 0, ret;
int nr_pages; int nr_pages;
unsigned int len = iter->count; unsigned int len = iter->count;
unsigned int offset = map_data ? offset_in_page(map_data->offset) : 0; unsigned int offset = map_data ? offset_in_page(map_data->offset) : 0;
pr_debug(" *!*");
bmd = bio_alloc_map_data(iter, gfp_mask); bmd = bio_alloc_map_data(iter, gfp_mask);
if (!bmd) if (!bmd)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
/* /*
* We need to do a deep copy of the iov_iter including the iovecs. * We need to do a deep copy of the iov_iter including the iovecs.
...@@ -1293,12 +1296,12 @@ struct bio *bio_map_user_iov(struct request_queue *q, ...@@ -1293,12 +1296,12 @@ struct bio *bio_map_user_iov(struct request_queue *q,
gfp_t gfp_mask) gfp_t gfp_mask)
{ {
int j; int j;
struct bio *bio; struct bio *bio;
int ret; int ret;
struct bio_vec *bvec; struct bio_vec *bvec;
pr_debug(" *!*");
if (!iov_iter_count(iter)) if (!iov_iter_count(iter))
return ERR_PTR(-EINVAL); return ERR_PTR(-EINVAL);
bio = bio_kmalloc(gfp_mask, iov_iter_npages(iter, BIO_MAX_PAGES)); bio = bio_kmalloc(gfp_mask, iov_iter_npages(iter, BIO_MAX_PAGES));
if (!bio) if (!bio)
...@@ -1430,13 +1433,13 @@ struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len, ...@@ -1430,13 +1433,13 @@ struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len,
unsigned long kaddr = (unsigned long)data; unsigned long kaddr = (unsigned long)data;
unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT; unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long start = kaddr >> PAGE_SHIFT; unsigned long start = kaddr >> PAGE_SHIFT;
const int nr_pages = end - start; const int nr_pages = end - start;
int offset, i; int offset, i;
struct bio *bio; struct bio *bio;
pr_debug(" *!*");
bio = bio_kmalloc(gfp_mask, nr_pages); bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio) if (!bio)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
offset = offset_in_page(kaddr); offset = offset_in_page(kaddr);
for (i = 0; i < nr_pages; i++) { for (i = 0; i < nr_pages; i++) {
...@@ -1502,13 +1505,13 @@ struct bio *bio_copy_kern(struct request_queue *q, void *data, unsigned int len, ...@@ -1502,13 +1505,13 @@ struct bio *bio_copy_kern(struct request_queue *q, void *data, unsigned int len,
unsigned long kaddr = (unsigned long)data; unsigned long kaddr = (unsigned long)data;
unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT; unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long start = kaddr >> PAGE_SHIFT; unsigned long start = kaddr >> PAGE_SHIFT;
struct bio *bio; struct bio *bio;
void *p = data; void *p = data;
int nr_pages = 0; int nr_pages = 0;
pr_debug(" *!*");
/* /*
* Overflow, abort * Overflow, abort
*/ */
if (end < start) if (end < start)
return ERR_PTR(-EINVAL); return ERR_PTR(-EINVAL);
...@@ -1665,30 +1668,30 @@ defer: ...@@ -1665,30 +1668,30 @@ defer:
EXPORT_SYMBOL_GPL(bio_check_pages_dirty); EXPORT_SYMBOL_GPL(bio_check_pages_dirty);
void generic_start_io_acct(struct request_queue *q, int op, void generic_start_io_acct(struct request_queue *q, int op,
unsigned long sectors, struct hd_struct *part) unsigned long sectors, struct hd_struct *part)
{ {
const int sgrp = op_stat_group(op); const int sgrp = op_stat_group(op);
int cpu = part_stat_lock(); pr_debug(" *!*");
int cpu = part_stat_lock();
part_round_stats(q, cpu, part);
part_stat_inc(cpu, part, ios[sgrp]);
part_stat_add(cpu, part, sectors[sgrp], sectors);
part_inc_in_flight(q, part, op_is_write(op));
part_round_stats(q, cpu, part); part_stat_unlock();
part_stat_inc(cpu, part, ios[sgrp]);
part_stat_add(cpu, part, sectors[sgrp], sectors);
part_inc_in_flight(q, part, op_is_write(op));
part_stat_unlock();
} }
EXPORT_SYMBOL(generic_start_io_acct); EXPORT_SYMBOL(generic_start_io_acct);
void generic_end_io_acct(struct request_queue *q, int req_op, void generic_end_io_acct(struct request_queue *q, int req_op,
struct hd_struct *part, unsigned long start_time) struct hd_struct *part, unsigned long start_time)
{ {
unsigned long duration = jiffies - start_time; unsigned long duration = jiffies - start_time;
const int sgrp = op_stat_group(req_op); const int sgrp = op_stat_group(req_op);
int cpu = part_stat_lock(); pr_debug(" *!*");
int cpu = part_stat_lock();
part_stat_add(cpu, part, nsecs[sgrp], jiffies_to_nsecs(duration)); part_stat_add(cpu, part, nsecs[sgrp], jiffies_to_nsecs(duration));
part_round_stats(q, cpu, part); part_round_stats(q, cpu, part);
part_dec_in_flight(q, part, op_is_write(req_op)); part_dec_in_flight(q, part, op_is_write(req_op));
part_stat_unlock(); part_stat_unlock();
} }
......
src/block/blk-core.c 0 → 100644
View file @ 8b4a20b4
This source diff could not be displayed because it is too large. You can view the blob instead.
src/drivers/ata/ahci_elphel.c
View file @ 8b4a20b4
...@@ -525,7 +525,7 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc) ...@@ -525,7 +525,7 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc)
unsigned int n_elem; unsigned int n_elem;
struct scatterlist *sg; struct scatterlist *sg;
struct ahci_sg *ahci_sg; struct ahci_sg *ahci_sg;
// dev_dbg(ap->dev, "is_atapi = %u, protocol=%u\n",is_atapi,qc->tf.protocol);
dev_dbg(ap->dev, "cmd = 0x%x, qc->tag = %u, ap->qc_active = %u, link->sactive = %u, link->active_tag = %u\n", dev_dbg(ap->dev, "cmd = 0x%x, qc->tag = %u, ap->qc_active = %u, link->sactive = %u, link->active_tag = %u\n",
qc->tf.command, qc->tag, ap->qc_active, ap->link.sactive, ap->link.active_tag); qc->tf.command, qc->tag, ap->qc_active, ap->link.sactive, ap->link.active_tag);
dev_dbg(ap->dev, "cmd = 0x%x, lba = %u, nob_lba = %u, nsect = %u, nob_nsect = %u\n", dev_dbg(ap->dev, "cmd = 0x%x, lba = %u, nob_lba = %u, nsect = %u, nob_nsect = %u\n",
...@@ -557,6 +557,9 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc) ...@@ -557,6 +557,9 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc)
*/ */
n_elem = 0; n_elem = 0;
ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
dev_dbg(ap->dev, "page_link = 0x%08lx, offs = 0x%08x, length=0x%08x, dma_address=0x%08x n_elem = %u\n",\
qc->sg->page_link, qc->sg->offset, qc->sg->length, qc->sg->dma_address, n_elem );
if (qc->flags & ATA_QCFLAG_DMAMAP) { if (qc->flags & ATA_QCFLAG_DMAMAP) {
for_each_sg(qc->sg, sg, qc->n_elem, n_elem) { for_each_sg(qc->sg, sg, qc->n_elem, n_elem) {
dma_addr_t addr = sg_dma_address(sg); dma_addr_t addr = sg_dma_address(sg);
...@@ -565,6 +568,9 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc) ...@@ -565,6 +568,9 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc)
ahci_sg[n_elem].addr = cpu_to_le32(addr & 0xffffffff); ahci_sg[n_elem].addr = cpu_to_le32(addr & 0xffffffff);
ahci_sg[n_elem].addr_hi = cpu_to_le32((addr >> 16) >> 16); ahci_sg[n_elem].addr_hi = cpu_to_le32((addr >> 16) >> 16);
ahci_sg[n_elem].flags_size = cpu_to_le32(sg_len - 1); ahci_sg[n_elem].flags_size = cpu_to_le32(sg_len - 1);
dev_dbg(ap->dev, "n_elem = %u, addr = 0x%x, len=%u, .addr=0x%08x .add_hi=0x%08x flags_size=0x%x\n",\
n_elem, addr, sg_len, ahci_sg[n_elem].addr, ahci_sg[n_elem].addr_hi, ahci_sg[n_elem].flags_size);
} }
} }
...@@ -578,7 +584,6 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc) ...@@ -578,7 +584,6 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc)
opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
ahci_fill_cmd_slot(pp, qc->tag, opts); ahci_fill_cmd_slot(pp, qc->tag, opts);
dev_dbg(ap->dev, "dump command table content, first %d bytes, phys addr = 0x%x:\n", 16, pp->cmd_tbl_dma); dev_dbg(ap->dev, "dump command table content, first %d bytes, phys addr = 0x%x:\n", 16, pp->cmd_tbl_dma);
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, pp->cmd_tbl, 16); print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, pp->cmd_tbl, 16);
...@@ -588,17 +593,24 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc) ...@@ -588,17 +593,24 @@ static void elphel_qc_prep(struct ata_queued_cmd *qc)
struct elphel_ahci_priv *dpriv = dev_get_dpriv(ap->dev); struct elphel_ahci_priv *dpriv = dev_get_dpriv(ap->dev);
set_dscope_tstamp(dpriv, TSTMP_CMD_SYS); set_dscope_tstamp(dpriv, TSTMP_CMD_SYS);
dev_dbg(ap->dev, "cmd = 0x%x, lba = %lu, nsect = %u\n", if ((qc->tf.command==ATA_CMD_WRITE) || (qc->tf.command==ATA_CMD_WRITE)) {
qc->tf.command, dev_dbg(ap->dev, "cmd = 0x%x, lba = %lu, nsect = %u\n",
((long)(qc->tf.lbal + (qc->tf.lbam << 8)+ (qc->tf.lbah << 16))) + qc->tf.command,
(((long) (qc->tf.hob_lbal + (qc->tf.hob_lbam << 8)+ (qc->tf.hob_lbah << 16))) << 24), ((long)(qc->tf.lbal + (qc->tf.lbam << 8)+ (qc->tf.lbah << 16))) +
qc->tf.nsect + (qc->tf.hob_nsect << 8)); (((long) (qc->tf.device & 0xf)) << 24),
qc->tf.nsect);
} else {
dev_dbg(ap->dev, "cmd = 0x%x, lba = %lu, nsect = %u\n",
qc->tf.command,
((long)(qc->tf.lbal + (qc->tf.lbam << 8)+ (qc->tf.lbah << 16))) +
(((long) (qc->tf.hob_lbal + (qc->tf.hob_lbam << 8)+ (qc->tf.hob_lbah << 16))) << 24),
qc->tf.nsect + (qc->tf.hob_nsect << 8));
}
//same //same
dev_dbg(ap->dev, "cmd = 0x%x, lba = %u, nob_lba = %u, nsect = %u, nob_nsect = %u\n", dev_dbg(ap->dev, "cmd = 0x%x, lba = %u, nob_lba = %u, nsect = %u, nob_nsect = %u\n",
((char *) (pp->cmd_tbl))[2], ((char *) (pp->cmd_tbl))[4] + (((char *) (pp->cmd_tbl))[5] << 8)+ (((char *)(pp->cmd_tbl))[6] << 16), ((char *) (pp->cmd_tbl))[2], ((char *) (pp->cmd_tbl))[4] + (((char *) (pp->cmd_tbl))[5] << 8)+ (((char *)(pp->cmd_tbl))[6] << 16),
((char *) (pp->cmd_tbl))[8] + (((char *)(pp->cmd_tbl))[9] << 8)+ (((char *)(pp->cmd_tbl))[10] << 16), ((char *) (pp->cmd_tbl))[8] + (((char *)(pp->cmd_tbl))[9] << 8)+ (((char *)(pp->cmd_tbl))[10] << 16),
((char *) (pp->cmd_tbl))[12], ((char *) (pp->cmd_tbl))[13]); ((char *) (pp->cmd_tbl))[12], ((char *) (pp->cmd_tbl))[13]);
} }
/** Set flag @e flag in driver private structure. This function uses spin lock to access the flags variable. */ /** Set flag @e flag in driver private structure. This function uses spin lock to access the flags variable. */
......
src/fs/block_dev.c
View file @ 8b4a20b4
...@@ -197,8 +197,9 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, ...@@ -197,8 +197,9 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
ssize_t ret; ssize_t ret;
blk_qc_t qc; blk_qc_t qc;
int i; int i;
pr_debug("pos = %lld, nr_pages = %d, type=%d, iov_offset=0x%x, count=%d, iter->iov->iov_base=%p, iter->iov->iov_len=%d, nr_segs = %ld", \ pr_debug("major=%u, first minor=%u, minors=%u, name=%s", bdev->bd_disk->major, bdev->bd_disk->first_minor, bdev->bd_disk->minors,bdev->bd_disk->disk_name);
pos, nr_pages, iter->type, iter->iov_offset, iter->count, iter->iov->iov_base, iter->iov->iov_len, iter->nr_segs); // pos - in file pr_debug("pos = %lld, nr_pages = %d, type=%d, iov_offset=0x%x, count=%d, iter->iov->iov_base=0x%x, iter->iov->iov_len=%d, nr_segs = %ld", \
pos, nr_pages, iter->type, iter->iov_offset, iter->count, (int)(iter->iov->iov_base), iter->iov->iov_len, iter->nr_segs); // pos - in file
if ((pos | iov_iter_alignment(iter)) & if ((pos | iov_iter_alignment(iter)) &
(bdev_logical_block_size(bdev) - 1)) { (bdev_logical_block_size(bdev) - 1)) {
pr_debug("pos = %lld, iov_iter_alignment(iter) = %ld, nr_pages = %d, bdev_logical_block_size(bdev) = %d", pos, iov_iter_alignment(iter), nr_pages, bdev_logical_block_size(bdev)); pr_debug("pos = %lld, iov_iter_alignment(iter) = %ld, nr_pages = %d, bdev_logical_block_size(bdev) = %d", pos, iov_iter_alignment(iter), nr_pages, bdev_logical_block_size(bdev));
...@@ -212,7 +213,8 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, ...@@ -212,7 +213,8 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
if (!vecs) if (!vecs)
return -ENOMEM; return -ENOMEM;
} }
pr_debug("DIO_INLINE_BIO_VECS = %d, nr_pages = %d", DIO_INLINE_BIO_VECS, nr_pages); pr_debug("DIO_INLINE_BIO_VECS = %d, nr_pages = %d, sizeof(struct bio)=%d, sizeof(struct bvec_iter)=%d",
DIO_INLINE_BIO_VECS, nr_pages, sizeof(struct bio), sizeof(struct bvec_iter)); //
bio_init(&bio, vecs, nr_pages); bio_init(&bio, vecs, nr_pages);
bio_set_dev(&bio, bdev); bio_set_dev(&bio, bdev);
bio.bi_iter.bi_sector = pos >> 9; bio.bi_iter.bi_sector = pos >> 9;
...@@ -221,7 +223,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, ...@@ -221,7 +223,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
bio.bi_end_io = blkdev_bio_end_io_simple; bio.bi_end_io = blkdev_bio_end_io_simple;
bio.bi_ioprio = iocb->ki_ioprio; bio.bi_ioprio = iocb->ki_ioprio;
ret = bio_iov_iter_get_pages(&bio, iter); ret = bio_iov_iter_get_pages(&bio, iter);
pr_debug("ret = %d", ret); // -14 pr_debug("ret = %d, bio.bi_vcnt=%d", ret, bio.bi_vcnt); // -14
if (unlikely(ret)) if (unlikely(ret))
goto out; goto out;
ret = bio.bi_iter.bi_size; ret = bio.bi_iter.bi_size;
...@@ -234,6 +236,11 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, ...@@ -234,6 +236,11 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
bio.bi_opf = dio_bio_write_op(iocb); bio.bi_opf = dio_bio_write_op(iocb);
task_io_account_write(ret); task_io_account_write(ret);
} }
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, &bio, sizeof(struct bio));
// pr_debug("bi_disk=0x%p, bi_sector=%llu, bi_size=%u, bi_private=0x%p, bi_vcnt=%u, bi_max_vecs=%u, bi_io_vec=0x%p, bi_pool=0x%p",
// bio.bi_disk, bio.bi_iter.bi_sector, bio.bi_iter.bi_size, bio.bi_private, bio.bi_vcnt, bio.bi_max_vecs, bio.bi_io_vec, bio.bi_pool);
pr_debug("bi_disk=0x%08x, bi_sector=%llu, bi_size=%u, bi_private=0x%08x, bi_vcnt=%u, bi_max_vecs=%u, bi_io_vec=0x%08x, bi_pool=0x%08x",
(int)(bio.bi_disk), bio.bi_iter.bi_sector, bio.bi_iter.bi_size, (int)(bio.bi_private), bio.bi_vcnt, bio.bi_max_vecs, (int) (bio.bi_io_vec), (int) (bio.bi_pool ));
qc = submit_bio(&bio); qc = submit_bio(&bio);
for (;;) { for (;;) {
...@@ -245,11 +252,15 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, ...@@ -245,11 +252,15 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
io_schedule(); io_schedule();
} }
__set_current_state(TASK_RUNNING); __set_current_state(TASK_RUNNING);
pr_debug("after __set_current_state(TASK_RUNNING)"); pr_debug("after __set_current_state(TASK_RUNNING), sizeof(struct page)=%d",sizeof(struct page));
bio_for_each_segment_all(bvec, &bio, i) { bio_for_each_segment_all(bvec, &bio, i) {
if (should_dirty && !PageCompound(bvec->bv_page)) if (should_dirty && !PageCompound(bvec->bv_page))
set_page_dirty_lock(bvec->bv_page); set_page_dirty_lock(bvec->bv_page);
pr_debug("%3u: bvec->bv_page=0x%08x, phys=0x%08x bv_len=%#x, bv_offset=%#x, bvec=0x%x",i, (int) (bvec->bv_page), (int)(page_to_phys(bvec->bv_page)), bvec->bv_len, bvec->bv_offset, (int) bvec);
put_page(bvec->bv_page); put_page(bvec->bv_page);
if (i < 10){
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, bvec->bv_page, sizeof(struct page));
}
} }
pr_debug("bio.bi_status = %d", bio.bi_status); pr_debug("bio.bi_status = %d", bio.bi_status);
...@@ -261,6 +272,7 @@ out: ...@@ -261,6 +272,7 @@ out:
kfree(vecs); kfree(vecs);
bio_uninit(&bio); bio_uninit(&bio);
pr_debug("uninited bio");
return ret; return ret;
} }
......
src/fs/read_write.c
View file @ 8b4a20b4
...@@ -466,13 +466,23 @@ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t ...@@ -466,13 +466,23 @@ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t
struct kiocb kiocb; struct kiocb kiocb;
struct iov_iter iter; struct iov_iter iter;
ssize_t ret; ssize_t ret;
loff_t debug_data = 0;
int debug_copied = 0;
if (!strncmp(filp->f_path.dentry->d_name.name, "sda2", 4)) { if (!strncmp(filp->f_path.dentry->d_name.name, "sda2", 4)) {
pr_debug("pos=%llu, len=%d, buf=0x%p", *ppos, len, buf); // pr_debug("pos=%llu, len=%d, buf=0x%p, data=0x%llx", *ppos, len, buf, ((loff_t*) (buf))[0]); pr_debug("pos=%llu, len=%d, buf=0x%p", *ppos, len, buf);
} }
init_sync_kiocb(&kiocb, filp); init_sync_kiocb(&kiocb, filp);
kiocb.ki_pos = *ppos; kiocb.ki_pos = *ppos;
iov_iter_init(&iter, WRITE, &iov, 1, len); iov_iter_init(&iter, WRITE, &iov, 1, len);
if (!strncmp(filp->f_path.dentry->d_name.name, "sda2", 4)) {
debug_copied = copy_from_user(&debug_data, iter.iov->iov_base, 8);
pr_debug("len=%u, base=0x%p, data=0x%llx, debug_copied=%d",\
iter.iov->iov_len, iter.iov->iov_base, debug_data, debug_copied);
}
ret = call_write_iter(filp, &kiocb, &iter); ret = call_write_iter(filp, &kiocb, &iter);
BUG_ON(ret == -EIOCBQUEUED); BUG_ON(ret == -EIOCBQUEUED);
if (ret > 0) if (ret > 0)
...@@ -483,10 +493,13 @@ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t ...@@ -483,10 +493,13 @@ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t
ssize_t __vfs_write(struct file *file, const char __user *p, size_t count, ssize_t __vfs_write(struct file *file, const char __user *p, size_t count,
loff_t *pos) loff_t *pos)
{ {
loff_t debug_data = 0;
int debug_copied = 0;
if (!strncmp(file->f_path.dentry->d_name.name, "sda2", 4)) { if (!strncmp(file->f_path.dentry->d_name.name, "sda2", 4)) {
pr_debug("pos=%llu, count=%d, p=0x%p", *pos, count, p); // pr_debug("pos=%llu, count=%d, p=0x%p, data=0x%llx", *pos, count, p, ((loff_t*) (p))[0]); debug_copied = copy_from_user(&debug_data, p, 8);
pr_debug("pos=%llu, count=%d, p=0x%p, data=0x%llx, debug_copied=%d", *pos, count, p, debug_data, debug_copied);
// pr_debug("pos=%llu, count=%d, p=0x%p, data=0x%llx", *pos, count, p, ((loff_t*) (p))[0]); // panic reading user space from kernel code
} }
if (file->f_op->write) if (file->f_op->write)
return file->f_op->write(file, p, count, pos); return file->f_op->write(file, p, count, pos);
else if (file->f_op->write_iter) else if (file->f_op->write_iter)
......
src/lib/iov_iter.c
View file @ 8b4a20b4
...@@ -1192,7 +1192,7 @@ ssize_t iov_iter_get_pages(struct iov_iter *i, ...@@ -1192,7 +1192,7 @@ ssize_t iov_iter_get_pages(struct iov_iter *i,
{ {
if (maxsize > i->count) if (maxsize > i->count)
maxsize = i->count; maxsize = i->count;
pr_debug("maxsize = %d, maxpages=%d, start (outut) = 0x%x ", maxsize, maxpages, *start); pr_debug("maxsize = %d, maxpages=%d, start (output) = 0x%x ", maxsize, maxpages, *start);
if (unlikely(i->type & ITER_PIPE)) if (unlikely(i->type & ITER_PIPE))
return pipe_get_pages(i, pages, maxsize, maxpages, start); return pipe_get_pages(i, pages, maxsize, maxpages, start);
iterate_all_kinds(i, maxsize, v, ({ iterate_all_kinds(i, maxsize, v, ({
...@@ -1205,9 +1205,13 @@ ssize_t iov_iter_get_pages(struct iov_iter *i, ...@@ -1205,9 +1205,13 @@ ssize_t iov_iter_get_pages(struct iov_iter *i,
len = maxpages * PAGE_SIZE; len = maxpages * PAGE_SIZE;
addr &= ~(PAGE_SIZE - 1); addr &= ~(PAGE_SIZE - 1);
n = DIV_ROUND_UP(len, PAGE_SIZE); n = DIV_ROUND_UP(len, PAGE_SIZE);
pr_debug("iterate_iovec(), addr =0x%08lx, len=%u, n=%u, write=%u", addr, len, n, (i->type & WRITE) != WRITE);
res = get_user_pages_fast(addr, n, (i->type & WRITE) != WRITE, pages); res = get_user_pages_fast(addr, n, (i->type & WRITE) != WRITE, pages);
if (unlikely(res < 0)) if (unlikely(res < 0)) {
pr_debug("iterate_iovec(), res = %d", res);
return res; return res;
}
pr_debug("iterate_iovec(), res = %d, start (output) = 0x%x", res, *start);
return (res == n ? len : res * PAGE_SIZE) - *start; return (res == n ? len : res * PAGE_SIZE) - *start;
0;}),({ 0;}),({
/* can't be more than PAGE_SIZE */ /* can't be more than PAGE_SIZE */
......
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