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Commit 9e203936 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd 

* 'for-linus' of git://git.open-osd.org/linux-open-osd:
  ore: Must support none-PAGE-aligned IO
  ore: fix BUG_ON, too few sgs when reading
  ore: Fix crash in case of an IO error.
  ore: FIX breakage when MISC_FILESYSTEMS is not set
parents 993ecff8 724577ca

fs/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -218,6 +218,8 @@ source "fs/exofs/Kconfig" 


endif # MISC_FILESYSTEMS



source "fs/exofs/Kconfig.ore"



menuconfig NETWORK_FILESYSTEMS

	bool "Network File Systems"

	default y

fs/exofs/Kconfig

+0 −11
Original line number Diff line number Diff line 
# Note ORE needs to "select ASYNC_XOR". So Not to force multiple selects

# for every ORE user we do it like this. Any user should add itself here

# at the "depends on EXOFS_FS || ..." with an ||. The dependencies are

# selected here, and we default to "ON". So in effect it is like been

# selected by any of the users.

config ORE

	tristate

	depends on EXOFS_FS || PNFS_OBJLAYOUT

	select ASYNC_XOR

	default SCSI_OSD_ULD



config EXOFS_FS

	tristate "exofs: OSD based file system support"

	depends on SCSI_OSD_ULD

fs/exofs/Kconfig.ore

0 → 100644
+12 −0
Original line number Diff line number Diff line 
# ORE - Objects Raid Engine (libore.ko)

#

# Note ORE needs to "select ASYNC_XOR". So Not to force multiple selects

# for every ORE user we do it like this. Any user should add itself here

# at the "depends on EXOFS_FS || ..." with an ||. The dependencies are

# selected here, and we default to "ON". So in effect it is like been

# selected by any of the users.

config ORE

	tristate

	depends on EXOFS_FS || PNFS_OBJLAYOUT

	select ASYNC_XOR

	default SCSI_OSD_ULD

fs/exofs/ore.c

+4 −4
Original line number Diff line number Diff line
@@ -266,7 +266,7 @@ int ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc, 


			/* first/last seg is split */

			num_raid_units += layout->group_width;

			sgs_per_dev = div_u64(num_raid_units, data_devs);

			sgs_per_dev = div_u64(num_raid_units, data_devs) + 2;

		} else {

			/* For Writes add parity pages array. */

			max_par_pages = num_raid_units * pages_in_unit *
@@ -445,10 +445,10 @@ int ore_check_io(struct ore_io_state *ios, ore_on_dev_error on_dev_error) 
			u64 residual = ios->reading ?

					or->in.residual : or->out.residual;

			u64 offset = (ios->offset + ios->length) - residual;

			struct ore_dev *od = ios->oc->ods[

					per_dev->dev - ios->oc->first_dev];

			unsigned dev = per_dev->dev - ios->oc->first_dev;

			struct ore_dev *od = ios->oc->ods[dev];



			on_dev_error(ios, od, per_dev->dev, osi.osd_err_pri,

			on_dev_error(ios, od, dev, osi.osd_err_pri,

				     offset, residual);

		}

		if (osi.osd_err_pri >= acumulated_osd_err) {

fs/exofs/ore_raid.c

+65 −13
Original line number Diff line number Diff line
@@ -328,8 +328,8 @@ static int _alloc_read_4_write(struct ore_io_state *ios) 
/* @si contains info of the to-be-inserted page. Update of @si should be

 * maintained by caller. Specificaly si->dev, si->obj_offset, ...

 */

static int _add_to_read_4_write(struct ore_io_state *ios,

				struct ore_striping_info *si, struct page *page)

static int _add_to_r4w(struct ore_io_state *ios, struct ore_striping_info *si,

		       struct page *page, unsigned pg_len)

{

	struct request_queue *q;

	struct ore_per_dev_state *per_dev;
@@ -366,17 +366,60 @@ static int _add_to_read_4_write(struct ore_io_state *ios, 
		_ore_add_sg_seg(per_dev, gap, true);

	}

	q = osd_request_queue(ore_comp_dev(read_ios->oc, per_dev->dev));

	added_len = bio_add_pc_page(q, per_dev->bio, page, PAGE_SIZE, 0);

	if (unlikely(added_len != PAGE_SIZE)) {

	added_len = bio_add_pc_page(q, per_dev->bio, page, pg_len,

				    si->obj_offset % PAGE_SIZE);

	if (unlikely(added_len != pg_len)) {

		ORE_DBGMSG("Failed to bio_add_pc_page bi_vcnt=%d\n",

			      per_dev->bio->bi_vcnt);

		return -ENOMEM;

	}



	per_dev->length += PAGE_SIZE;

	per_dev->length += pg_len;

	return 0;

}



/* read the beginning of an unaligned first page */

static int _add_to_r4w_first_page(struct ore_io_state *ios, struct page *page)

{

	struct ore_striping_info si;

	unsigned pg_len;



	ore_calc_stripe_info(ios->layout, ios->offset, 0, &si);



	pg_len = si.obj_offset % PAGE_SIZE;

	si.obj_offset -= pg_len;



	ORE_DBGMSG("offset=0x%llx len=0x%x index=0x%lx dev=%x\n",

		   _LLU(si.obj_offset), pg_len, page->index, si.dev);



	return _add_to_r4w(ios, &si, page, pg_len);

}



/* read the end of an incomplete last page */

static int _add_to_r4w_last_page(struct ore_io_state *ios, u64 *offset)

{

	struct ore_striping_info si;

	struct page *page;

	unsigned pg_len, p, c;



	ore_calc_stripe_info(ios->layout, *offset, 0, &si);



	p = si.unit_off / PAGE_SIZE;

	c = _dev_order(ios->layout->group_width * ios->layout->mirrors_p1,

		       ios->layout->mirrors_p1, si.par_dev, si.dev);

	page = ios->sp2d->_1p_stripes[p].pages[c];



	pg_len = PAGE_SIZE - (si.unit_off % PAGE_SIZE);

	*offset += pg_len;



	ORE_DBGMSG("p=%d, c=%d next-offset=0x%llx len=0x%x dev=%x par_dev=%d\n",

		   p, c, _LLU(*offset), pg_len, si.dev, si.par_dev);



	BUG_ON(!page);



	return _add_to_r4w(ios, &si, page, pg_len);

}



static void _mark_read4write_pages_uptodate(struct ore_io_state *ios, int ret)

{

	struct bio_vec *bv;
@@ -444,9 +487,13 @@ static int _read_4_write(struct ore_io_state *ios) 
			struct page **pp = &_1ps->pages[c];

			bool uptodate;



			if (*pp)

			if (*pp) {

				if (ios->offset % PAGE_SIZE)

					/* Read the remainder of the page */

					_add_to_r4w_first_page(ios, *pp);

				/* to-be-written pages start here */

				goto read_last_stripe;

			}



			*pp = ios->r4w->get_page(ios->private, offset,

						 &uptodate);
@@ -454,7 +501,7 @@ static int _read_4_write(struct ore_io_state *ios) 
				return -ENOMEM;



			if (!uptodate)

				_add_to_read_4_write(ios, &read_si, *pp);

				_add_to_r4w(ios, &read_si, *pp, PAGE_SIZE);



			/* Mark read-pages to be cache_released */

			_1ps->page_is_read[c] = true;
@@ -465,8 +512,11 @@ static int _read_4_write(struct ore_io_state *ios) 
	}



read_last_stripe:

	offset = ios->offset + (ios->length + PAGE_SIZE - 1) /

				PAGE_SIZE * PAGE_SIZE;

	offset = ios->offset + ios->length;

	if (offset % PAGE_SIZE)

		_add_to_r4w_last_page(ios, &offset);

		/* offset will be aligned to next page */



	last_stripe_end = div_u64(offset + bytes_in_stripe - 1, bytes_in_stripe)

				 * bytes_in_stripe;

	if (offset == last_stripe_end) /* Optimize for the aligned case */
@@ -503,7 +553,7 @@ read_last_stripe: 
			/* Mark read-pages to be cache_released */

			_1ps->page_is_read[c] = true;

			if (!uptodate)

				_add_to_read_4_write(ios, &read_si, page);

				_add_to_r4w(ios, &read_si, page, PAGE_SIZE);

		}



		offset += PAGE_SIZE;
@@ -551,7 +601,11 @@ int _ore_add_parity_unit(struct ore_io_state *ios, 
			    unsigned cur_len)

{

	if (ios->reading) {

		BUG_ON(per_dev->cur_sg >= ios->sgs_per_dev);

		if (per_dev->cur_sg >= ios->sgs_per_dev) {

			ORE_DBGMSG("cur_sg(%d) >= sgs_per_dev(%d)\n" ,

				per_dev->cur_sg, ios->sgs_per_dev);

			return -ENOMEM;

		}

		_ore_add_sg_seg(per_dev, cur_len, true);

	} else {

		struct __stripe_pages_2d *sp2d = ios->sp2d;
@@ -612,8 +666,6 @@ int _ore_post_alloc_raid_stuff(struct ore_io_state *ios) 
			return -ENOMEM;

		}



		BUG_ON(ios->offset % PAGE_SIZE);



		/* Round io down to last full strip */

		first_stripe = div_u64(ios->offset, stripe_size);

		last_stripe = div_u64(ios->offset + ios->length, stripe_size);