* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Intel Corporation.
+ * Copyright (c) 2012, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
/* ext_depth() */
#include <ldiskfs/ldiskfs_extents.h>
-#ifndef HAVE_PAGE_CONSTANT
-#define mapping_cap_page_constant_write(mapping) 0
-#define SetPageConstant(page) do {} while (0)
-#define ClearPageConstant(page) do {} while (0)
-#endif
-
-#ifndef HAS_GENERIC_ERROR_REMOVE_PAGE
-int generic_error_remove_page(struct address_space *mapping, struct page *page)
-{
- if (mapping == NULL)
- return -EINVAL;
-
- if (mapping != page->mapping)
- return -EIO;
- /*
- * Only punch for normal data pages for now.
- * Handling other types like directories would need more auditing.
- */
- if (!S_ISREG(mapping->host->i_mode))
- return -EIO;
-
- if (page_mapped(page)) {
- unmap_mapping_range(mapping,
- (loff_t)page->index << PAGE_CACHE_SHIFT,
- PAGE_CACHE_SIZE, 0);
- }
- truncate_complete_page(mapping, page);
- return 0;
-}
-#endif
-
static int __osd_init_iobuf(struct osd_device *d, struct osd_iobuf *iobuf,
int rw, int line, int pages)
{
LASSERTF(iobuf->dr_elapsed_valid == 0,
"iobuf %p, reqs %d, rw %d, line %d\n", iobuf,
- cfs_atomic_read(&iobuf->dr_numreqs), iobuf->dr_rw,
+ atomic_read(&iobuf->dr_numreqs), iobuf->dr_rw,
iobuf->dr_init_at);
LASSERT(pages <= PTLRPC_MAX_BRW_PAGES);
- cfs_waitq_init(&iobuf->dr_wait);
- cfs_atomic_set(&iobuf->dr_numreqs, 0);
- iobuf->dr_npages = 0;
- iobuf->dr_error = 0;
- iobuf->dr_dev = d;
- iobuf->dr_frags = 0;
- iobuf->dr_elapsed = 0;
- /* must be counted before, so assert */
- iobuf->dr_rw = rw;
+ init_waitqueue_head(&iobuf->dr_wait);
+ atomic_set(&iobuf->dr_numreqs, 0);
+ iobuf->dr_npages = 0;
+ iobuf->dr_error = 0;
+ iobuf->dr_dev = d;
+ iobuf->dr_frags = 0;
+ iobuf->dr_elapsed = 0;
+ /* must be counted before, so assert */
+ iobuf->dr_rw = rw;
iobuf->dr_init_at = line;
- blocks = pages * (CFS_PAGE_SIZE >> osd_sb(d)->s_blocksize_bits);
+ blocks = pages * (PAGE_CACHE_SIZE >> osd_sb(d)->s_blocksize_bits);
if (iobuf->dr_bl_buf.lb_len >= blocks * sizeof(iobuf->dr_blocks[0])) {
LASSERT(iobuf->dr_pg_buf.lb_len >=
pages * sizeof(iobuf->dr_pages[0]));
CDEBUG(D_OTHER, "realloc %u for %u (%u) pages\n",
(unsigned)(pages * sizeof(iobuf->dr_pages[0])), i, pages);
pages = i;
- blocks = pages * (CFS_PAGE_SIZE >> osd_sb(d)->s_blocksize_bits);
+ blocks = pages * (PAGE_CACHE_SIZE >> osd_sb(d)->s_blocksize_bits);
iobuf->dr_max_pages = 0;
CDEBUG(D_OTHER, "realloc %u for %u blocks\n",
(unsigned)(blocks * sizeof(iobuf->dr_blocks[0])), blocks);
#define __REQ_WRITE BIO_RW
#endif
-#ifdef HAVE_BIO_ENDIO_2ARG
-#define DIO_RETURN(a)
static void dio_complete_routine(struct bio *bio, int error)
+{
+ struct osd_iobuf *iobuf = bio->bi_private;
+#ifdef HAVE_BVEC_ITER
+ struct bvec_iter iter;
+ struct bio_vec bvl;
#else
-#define DIO_RETURN(a) return(a)
-static int dio_complete_routine(struct bio *bio, unsigned int done, int error)
+ int iter;
+ struct bio_vec *bvl;
#endif
-{
- struct osd_iobuf *iobuf = bio->bi_private;
- struct bio_vec *bvl;
- int i;
/* CAVEAT EMPTOR: possibly in IRQ context
* DO NOT record procfs stats here!!! */
- if (unlikely(iobuf == NULL)) {
- CERROR("***** bio->bi_private is NULL! This should never "
- "happen. Normally, I would crash here, but instead I "
- "will dump the bio contents to the console. Please "
- "report this to <http://jira.whamcloud.com/> , along "
- "with any interesting messages leading up to this point "
- "(like SCSI errors, perhaps). Because bi_private is "
- "NULL, I can't wake up the thread that initiated this "
- "IO - you will probably have to reboot this node.\n");
- CERROR("bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d, "
- "bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, "
- "bi_private: %p\n", bio->bi_next, bio->bi_flags,
- bio->bi_rw, bio->bi_vcnt, bio->bi_idx, bio->bi_size,
- bio->bi_end_io, cfs_atomic_read(&bio->bi_cnt),
- bio->bi_private);
- DIO_RETURN(0);
- }
+ if (unlikely(iobuf == NULL)) {
+ CERROR("***** bio->bi_private is NULL! This should never "
+ "happen. Normally, I would crash here, but instead I "
+ "will dump the bio contents to the console. Please "
+ "report this to <https://jira.hpdd.intel.com/> , along "
+ "with any interesting messages leading up to this point "
+ "(like SCSI errors, perhaps). Because bi_private is "
+ "NULL, I can't wake up the thread that initiated this "
+ "IO - you will probably have to reboot this node.\n");
+ CERROR("bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d, "
+ "bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, "
+ "bi_private: %p\n", bio->bi_next, bio->bi_flags,
+ bio->bi_rw, bio->bi_vcnt, bio_idx(bio),
+ bio_sectors(bio) << 9, bio->bi_end_io,
+ atomic_read(&bio->bi_cnt), bio->bi_private);
+ return;
+ }
- /* the check is outside of the cycle for performance reason -bzzz */
+ /* the check is outside of the cycle for performance reason -bzzz */
if (!test_bit(__REQ_WRITE, &bio->bi_rw)) {
- bio_for_each_segment(bvl, bio, i) {
- if (likely(error == 0))
- SetPageUptodate(bvl->bv_page);
- LASSERT(PageLocked(bvl->bv_page));
- ClearPageConstant(bvl->bv_page);
- }
- cfs_atomic_dec(&iobuf->dr_dev->od_r_in_flight);
- } else {
- struct page *p = iobuf->dr_pages[0];
- if (p->mapping) {
- if (mapping_cap_page_constant_write(p->mapping)) {
- bio_for_each_segment(bvl, bio, i) {
- ClearPageConstant(bvl->bv_page);
- }
- }
- }
- cfs_atomic_dec(&iobuf->dr_dev->od_w_in_flight);
- }
+ bio_for_each_segment(bvl, bio, iter) {
+ if (likely(error == 0))
+ SetPageUptodate(bvec_iter_page(&bvl, iter));
+ LASSERT(PageLocked(bvec_iter_page(&bvl, iter)));
+ }
+ atomic_dec(&iobuf->dr_dev->od_r_in_flight);
+ } else {
+ atomic_dec(&iobuf->dr_dev->od_w_in_flight);
+ }
- /* any real error is good enough -bzzz */
- if (error != 0 && iobuf->dr_error == 0)
- iobuf->dr_error = error;
+ /* any real error is good enough -bzzz */
+ if (error != 0 && iobuf->dr_error == 0)
+ iobuf->dr_error = error;
/*
* set dr_elapsed before dr_numreqs turns to 0, otherwise
* data in this processing and an assertion in a subsequent
* call to OSD.
*/
- if (cfs_atomic_read(&iobuf->dr_numreqs) == 1) {
+ if (atomic_read(&iobuf->dr_numreqs) == 1) {
iobuf->dr_elapsed = jiffies - iobuf->dr_start_time;
iobuf->dr_elapsed_valid = 1;
}
- if (cfs_atomic_dec_and_test(&iobuf->dr_numreqs))
- cfs_waitq_signal(&iobuf->dr_wait);
-
- /* Completed bios used to be chained off iobuf->dr_bios and freed in
- * filter_clear_dreq(). It was then possible to exhaust the biovec-256
- * mempool when serious on-disk fragmentation was encountered,
- * deadlocking the OST. The bios are now released as soon as complete
- * so the pool cannot be exhausted while IOs are competing. bug 10076 */
- bio_put(bio);
- DIO_RETURN(0);
+ if (atomic_dec_and_test(&iobuf->dr_numreqs))
+ wake_up(&iobuf->dr_wait);
+
+ /* Completed bios used to be chained off iobuf->dr_bios and freed in
+ * filter_clear_dreq(). It was then possible to exhaust the biovec-256
+ * mempool when serious on-disk fragmentation was encountered,
+ * deadlocking the OST. The bios are now released as soon as complete
+ * so the pool cannot be exhausted while IOs are competing. bug 10076 */
+ bio_put(bio);
}
static void record_start_io(struct osd_iobuf *iobuf, int size)
{
- struct osd_device *osd = iobuf->dr_dev;
- struct obd_histogram *h = osd->od_brw_stats.hist;
-
- iobuf->dr_frags++;
- cfs_atomic_inc(&iobuf->dr_numreqs);
-
- if (iobuf->dr_rw == 0) {
- cfs_atomic_inc(&osd->od_r_in_flight);
- lprocfs_oh_tally(&h[BRW_R_RPC_HIST],
- cfs_atomic_read(&osd->od_r_in_flight));
- lprocfs_oh_tally_log2(&h[BRW_R_DISK_IOSIZE], size);
- } else if (iobuf->dr_rw == 1) {
- cfs_atomic_inc(&osd->od_w_in_flight);
- lprocfs_oh_tally(&h[BRW_W_RPC_HIST],
- cfs_atomic_read(&osd->od_w_in_flight));
- lprocfs_oh_tally_log2(&h[BRW_W_DISK_IOSIZE], size);
- } else {
- LBUG();
- }
+ struct osd_device *osd = iobuf->dr_dev;
+ struct obd_histogram *h = osd->od_brw_stats.hist;
+
+ iobuf->dr_frags++;
+ atomic_inc(&iobuf->dr_numreqs);
+
+ if (iobuf->dr_rw == 0) {
+ atomic_inc(&osd->od_r_in_flight);
+ lprocfs_oh_tally(&h[BRW_R_RPC_HIST],
+ atomic_read(&osd->od_r_in_flight));
+ lprocfs_oh_tally_log2(&h[BRW_R_DISK_IOSIZE], size);
+ } else if (iobuf->dr_rw == 1) {
+ atomic_inc(&osd->od_w_in_flight);
+ lprocfs_oh_tally(&h[BRW_W_RPC_HIST],
+ atomic_read(&osd->od_w_in_flight));
+ lprocfs_oh_tally_log2(&h[BRW_W_DISK_IOSIZE], size);
+ } else {
+ LBUG();
+ }
}
static void osd_submit_bio(int rw, struct bio *bio)
static int can_be_merged(struct bio *bio, sector_t sector)
{
- unsigned int size;
-
- if (!bio)
- return 0;
+ if (bio == NULL)
+ return 0;
- size = bio->bi_size >> 9;
- return bio->bi_sector + size == sector ? 1 : 0;
+ return bio_end_sector(bio) == sector ? 1 : 0;
}
static int osd_do_bio(struct osd_device *osd, struct inode *inode,
struct osd_iobuf *iobuf)
{
- int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
+ int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
struct page **pages = iobuf->dr_pages;
int npages = iobuf->dr_npages;
unsigned long *blocks = iobuf->dr_blocks;
sector_bits))
nblocks++;
- /* I only set the page to be constant only if it
- * is mapped to a contiguous underlying disk block(s).
- * It will then make sure the corresponding device
- * cache of raid5 will be overwritten by this page.
- * - jay */
- if (iobuf->dr_rw && (nblocks == blocks_per_page) &&
- mapping_cap_page_constant_write(inode->i_mapping))
- SetPageConstant(page);
-
if (bio != NULL &&
can_be_merged(bio, sector) &&
bio_add_page(bio, page,
blocksize * nblocks, page_offset) != 0)
continue; /* added this frag OK */
- if (bio != NULL) {
- struct request_queue *q =
- bdev_get_queue(bio->bi_bdev);
-
- /* Dang! I have to fragment this I/O */
- CDEBUG(D_INODE, "bio++ sz %d vcnt %d(%d) "
- "sectors %d(%d) psg %d(%d) hsg %d(%d)\n",
- bio->bi_size,
- bio->bi_vcnt, bio->bi_max_vecs,
- bio->bi_size >> 9, queue_max_sectors(q),
+ if (bio != NULL) {
+ struct request_queue *q =
+ bdev_get_queue(bio->bi_bdev);
+ unsigned int bi_size = bio_sectors(bio) << 9;
+
+ /* Dang! I have to fragment this I/O */
+ CDEBUG(D_INODE, "bio++ sz %d vcnt %d(%d) "
+ "sectors %d(%d) psg %d(%d) hsg %d(%d)\n",
+ bi_size, bio->bi_vcnt, bio->bi_max_vecs,
+ bio_sectors(bio),
+ queue_max_sectors(q),
bio_phys_segments(q, bio),
queue_max_phys_segments(q),
- bio_hw_segments(q, bio),
- queue_max_hw_segments(q));
-
- record_start_io(iobuf, bio->bi_size);
- osd_submit_bio(iobuf->dr_rw, bio);
- }
+ 0, queue_max_hw_segments(q));
+ record_start_io(iobuf, bi_size);
+ osd_submit_bio(iobuf->dr_rw, bio);
+ }
/* allocate new bio */
bio = bio_alloc(GFP_NOIO, min(BIO_MAX_PAGES,
goto out;
}
- bio->bi_bdev = inode->i_sb->s_bdev;
- bio->bi_sector = sector;
+ bio->bi_bdev = inode->i_sb->s_bdev;
+ bio_set_sector(bio, sector);
bio->bi_rw = (iobuf->dr_rw == 0) ? READ : WRITE;
- bio->bi_end_io = dio_complete_routine;
- bio->bi_private = iobuf;
+ bio->bi_end_io = dio_complete_routine;
+ bio->bi_private = iobuf;
- rc = bio_add_page(bio, page,
- blocksize * nblocks, page_offset);
- LASSERT(rc != 0);
- }
- }
+ rc = bio_add_page(bio, page,
+ blocksize * nblocks, page_offset);
+ LASSERT(rc != 0);
+ }
+ }
- if (bio != NULL) {
- record_start_io(iobuf, bio->bi_size);
- osd_submit_bio(iobuf->dr_rw, bio);
- rc = 0;
- }
+ if (bio != NULL) {
+ record_start_io(iobuf, bio_sectors(bio) << 9);
+ osd_submit_bio(iobuf->dr_rw, bio);
+ rc = 0;
+ }
- out:
- /* in order to achieve better IO throughput, we don't wait for writes
- * completion here. instead we proceed with transaction commit in
- * parallel and wait for IO completion once transaction is stopped
- * see osd_trans_stop() for more details -bzzz */
- if (iobuf->dr_rw == 0) {
- cfs_wait_event(iobuf->dr_wait,
- cfs_atomic_read(&iobuf->dr_numreqs) == 0);
- }
+out:
+ /* in order to achieve better IO throughput, we don't wait for writes
+ * completion here. instead we proceed with transaction commit in
+ * parallel and wait for IO completion once transaction is stopped
+ * see osd_trans_stop() for more details -bzzz */
+ if (iobuf->dr_rw == 0) {
+ wait_event(iobuf->dr_wait,
+ atomic_read(&iobuf->dr_numreqs) == 0);
+ osd_fini_iobuf(osd, iobuf);
+ }
- if (rc == 0)
- rc = iobuf->dr_error;
- RETURN(rc);
+ if (rc == 0)
+ rc = iobuf->dr_error;
+ RETURN(rc);
}
static int osd_map_remote_to_local(loff_t offset, ssize_t len, int *nrpages,
*nrpages = 0;
while (len > 0) {
- int poff = offset & (CFS_PAGE_SIZE - 1);
- int plen = CFS_PAGE_SIZE - poff;
+ int poff = offset & (PAGE_CACHE_SIZE - 1);
+ int plen = PAGE_CACHE_SIZE - poff;
if (plen > len)
plen = len;
lnb->lnb_file_offset = offset;
lnb->lnb_page_offset = poff;
- lnb->len = plen;
- /* lb->flags = rnb->flags; */
- lnb->flags = 0;
- lnb->page = NULL;
- lnb->rc = 0;
+ lnb->lnb_len = plen;
+ /* lnb->lnb_flags = rnb->rnb_flags; */
+ lnb->lnb_flags = 0;
+ lnb->lnb_page = NULL;
+ lnb->lnb_rc = 0;
LASSERTF(plen <= len, "plen %u, len %lld\n", plen,
(long long) len);
RETURN(0);
}
-struct page *osd_get_page(struct dt_object *dt, loff_t offset, int rw)
+static struct page *osd_get_page(struct dt_object *dt, loff_t offset, int rw)
{
struct inode *inode = osd_dt_obj(dt)->oo_inode;
struct osd_device *d = osd_obj2dev(osd_dt_obj(dt));
LASSERT(inode);
- page = find_or_create_page(inode->i_mapping, offset >> CFS_PAGE_SHIFT,
+ page = find_or_create_page(inode->i_mapping, offset >> PAGE_CACHE_SHIFT,
GFP_NOFS | __GFP_HIGHMEM);
if (unlikely(page == NULL))
lprocfs_counter_add(d->od_stats, LPROC_OSD_NO_PAGE, 1);
* journal_start
* i_mutex
* page lock
+ *
+ * osd write path:
+ * - lock page(s)
+ * - journal_start
+ * - truncate_sem
+ *
+ * ext4 vmtruncate:
+ * - lock pages, unlock
+ * - journal_start
+ * - lock partial page
+ * - i_data_sem
+ *
+ */
+
+/**
+ * Unlock and release pages loaded by osd_bufs_get()
+ *
+ * Unlock \a npages pages from \a lnb and drop the refcount on them.
+ *
+ * \param env thread execution environment
+ * \param dt dt object undergoing IO (OSD object + methods)
+ * \param lnb array of pages undergoing IO
+ * \param npages number of pages in \a lnb
+ *
+ * \retval 0 always
+ */
+static int osd_bufs_put(const struct lu_env *env, struct dt_object *dt,
+ struct niobuf_local *lnb, int npages)
+{
+ int i;
- * osd write path
- * lock page(s)
- * journal_start
- * truncate_sem
+ for (i = 0; i < npages; i++) {
+ if (lnb[i].lnb_page == NULL)
+ continue;
+ LASSERT(PageLocked(lnb[i].lnb_page));
+ unlock_page(lnb[i].lnb_page);
+ page_cache_release(lnb[i].lnb_page);
+ lu_object_put(env, &dt->do_lu);
+ lnb[i].lnb_page = NULL;
+ }
- * ext4 vmtruncate:
- * lock pages, unlock
- * journal_start
- * lock partial page
- * i_data_sem
-
-*/
-int osd_bufs_get(const struct lu_env *env, struct dt_object *d, loff_t pos,
- ssize_t len, struct niobuf_local *lnb, int rw,
- struct lustre_capa *capa)
+ RETURN(0);
+}
+
+/**
+ * Load and lock pages undergoing IO
+ *
+ * Pages as described in the \a lnb array are fetched (from disk or cache)
+ * and locked for IO by the caller.
+ *
+ * DLM locking protects us from write and truncate competing for same region,
+ * but partial-page truncate can leave dirty pages in the cache for ldiskfs.
+ * It's possible the writeout on a such a page is in progress when we access
+ * it. It's also possible that during this writeout we put new (partial) data
+ * into the page, but won't be able to proceed in filter_commitrw_write().
+ * Therefore, just wait for writeout completion as it should be rare enough.
+ *
+ * \param env thread execution environment
+ * \param dt dt object undergoing IO (OSD object + methods)
+ * \param pos byte offset of IO start
+ * \param len number of bytes of IO
+ * \param lnb array of extents undergoing IO
+ * \param rw read or write operation?
+ * \param capa capabilities
+ *
+ * \retval pages (zero or more) loaded successfully
+ * \retval -ENOMEM on memory/page allocation error
+ */
+static int osd_bufs_get(const struct lu_env *env, struct dt_object *dt,
+ loff_t pos, ssize_t len, struct niobuf_local *lnb,
+ int rw)
{
- struct osd_object *obj = osd_dt_obj(d);
- int npages, i, rc = 0;
+ struct osd_object *obj = osd_dt_obj(dt);
+ int npages, i, rc = 0;
- LASSERT(obj->oo_inode);
+ LASSERT(obj->oo_inode);
- osd_map_remote_to_local(pos, len, &npages, lnb);
+ osd_map_remote_to_local(pos, len, &npages, lnb);
- for (i = 0; i < npages; i++, lnb++) {
+ for (i = 0; i < npages; i++, lnb++) {
+ lnb->lnb_page = osd_get_page(dt, lnb->lnb_file_offset, rw);
+ if (lnb->lnb_page == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
- /* We still set up for ungranted pages so that granted pages
- * can be written to disk as they were promised, and portals
- * needs to keep the pages all aligned properly. */
- lnb->dentry = (void *) obj;
+ wait_on_page_writeback(lnb->lnb_page);
+ BUG_ON(PageWriteback(lnb->lnb_page));
- lnb->page = osd_get_page(d, lnb->lnb_file_offset, rw);
- if (lnb->page == NULL)
- GOTO(cleanup, rc = -ENOMEM);
+ lu_object_get(&dt->do_lu);
+ }
- /* DLM locking protects us from write and truncate competing
- * for same region, but truncate can leave dirty page in the
- * cache. it's possible the writeout on a such a page is in
- * progress when we access it. it's also possible that during
- * this writeout we put new (partial) data, but then won't
- * be able to proceed in filter_commitrw_write(). thus let's
- * just wait for writeout completion, should be rare enough.
- * -bzzz */
- wait_on_page_writeback(lnb->page);
- BUG_ON(PageWriteback(lnb->page));
+ RETURN(i);
- lu_object_get(&d->do_lu);
- }
- rc = i;
+cleanup:
+ if (i > 0)
+ osd_bufs_put(env, dt, lnb - i, i);
+ return rc;
+}
+
+#ifndef HAVE_LDISKFS_MAP_BLOCKS
+
+#ifdef HAVE_EXT_PBLOCK /* Name changed to ext4_ext_pblock for kernel 2.6.35 */
+#define ldiskfs_ext_pblock(ex) ext_pblock((ex))
+#endif
+
+struct bpointers {
+ unsigned long *blocks;
+ unsigned long start;
+ int num;
+ int init_num;
+ int create;
+};
+
+static long ldiskfs_ext_find_goal(struct inode *inode,
+ struct ldiskfs_ext_path *path,
+ unsigned long block, int *aflags)
+{
+ struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
+ unsigned long bg_start;
+ unsigned long colour;
+ int depth;
+
+ if (path) {
+ struct ldiskfs_extent *ex;
+ depth = path->p_depth;
+
+ /* try to predict block placement */
+ if ((ex = path[depth].p_ext))
+ return ldiskfs_ext_pblock(ex) +
+ (block - le32_to_cpu(ex->ee_block));
+
+ /* it looks index is empty
+ * try to find starting from index itself */
+ if (path[depth].p_bh)
+ return path[depth].p_bh->b_blocknr;
+ }
+
+ /* OK. use inode's group */
+ bg_start = (ei->i_block_group * LDISKFS_BLOCKS_PER_GROUP(inode->i_sb)) +
+ le32_to_cpu(LDISKFS_SB(inode->i_sb)->s_es->s_first_data_block);
+ colour = (current->pid % 16) *
+ (LDISKFS_BLOCKS_PER_GROUP(inode->i_sb) / 16);
+ return bg_start + colour + block;
+}
+
+static unsigned long new_blocks(handle_t *handle, struct inode *inode,
+ struct ldiskfs_ext_path *path,
+ unsigned long block, unsigned long *count,
+ int *err)
+{
+ struct ldiskfs_allocation_request ar;
+ unsigned long pblock;
+ int aflags;
+
+ /* find neighbour allocated blocks */
+ ar.lleft = block;
+ *err = ldiskfs_ext_search_left(inode, path, &ar.lleft, &ar.pleft);
+ if (*err)
+ return 0;
+ ar.lright = block;
+ *err = ldiskfs_ext_search_right(inode, path, &ar.lright, &ar.pright);
+ if (*err)
+ return 0;
+
+ /* allocate new block */
+ ar.goal = ldiskfs_ext_find_goal(inode, path, block, &aflags);
+ ar.inode = inode;
+ ar.logical = block;
+ ar.len = *count;
+ ar.flags = LDISKFS_MB_HINT_DATA;
+ pblock = ldiskfs_mb_new_blocks(handle, &ar, err);
+ *count = ar.len;
+ return pblock;
+}
+
+static int ldiskfs_ext_new_extent_cb(struct inode *inode,
+ struct ldiskfs_ext_path *path,
+ struct ldiskfs_ext_cache *cex,
+#ifdef HAVE_EXT_PREPARE_CB_EXTENT
+ struct ldiskfs_extent *ex,
+#endif
+ void *cbdata)
+{
+ struct bpointers *bp = cbdata;
+ struct ldiskfs_extent nex;
+ unsigned long pblock;
+ unsigned long tgen;
+ int err, i;
+ unsigned long count;
+ handle_t *handle;
+
+#ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
+ if (cex->ec_type == LDISKFS_EXT_CACHE_EXTENT) {
+#else
+ if ((cex->ec_len != 0) && (cex->ec_start != 0)) {
+#endif
+ err = EXT_CONTINUE;
+ goto map;
+ }
+
+ if (bp->create == 0) {
+ i = 0;
+ if (cex->ec_block < bp->start)
+ i = bp->start - cex->ec_block;
+ if (i >= cex->ec_len)
+ CERROR("nothing to do?! i = %d, e_num = %u\n",
+ i, cex->ec_len);
+ for (; i < cex->ec_len && bp->num; i++) {
+ *(bp->blocks) = 0;
+ bp->blocks++;
+ bp->num--;
+ bp->start++;
+ }
+
+ return EXT_CONTINUE;
+ }
+
+ tgen = LDISKFS_I(inode)->i_ext_generation;
+ count = ldiskfs_ext_calc_credits_for_insert(inode, path);
+
+ handle = osd_journal_start(inode, LDISKFS_HT_MISC,
+ count + LDISKFS_ALLOC_NEEDED + 1);
+ if (IS_ERR(handle)) {
+ return PTR_ERR(handle);
+ }
+
+ if (tgen != LDISKFS_I(inode)->i_ext_generation) {
+ /* the tree has changed. so path can be invalid at moment */
+ ldiskfs_journal_stop(handle);
+ return EXT_REPEAT;
+ }
+
+ /* In 2.6.32 kernel, ldiskfs_ext_walk_space()'s callback func is not
+ * protected by i_data_sem as whole. so we patch it to store
+ * generation to path and now verify the tree hasn't changed */
+ down_write((&LDISKFS_I(inode)->i_data_sem));
+
+ /* validate extent, make sure the extent tree does not changed */
+ if (LDISKFS_I(inode)->i_ext_generation != path[0].p_generation) {
+ /* cex is invalid, try again */
+ up_write(&LDISKFS_I(inode)->i_data_sem);
+ ldiskfs_journal_stop(handle);
+ return EXT_REPEAT;
+ }
+
+ count = cex->ec_len;
+ pblock = new_blocks(handle, inode, path, cex->ec_block, &count, &err);
+ if (!pblock)
+ goto out;
+ BUG_ON(count > cex->ec_len);
+
+ /* insert new extent */
+ nex.ee_block = cpu_to_le32(cex->ec_block);
+ ldiskfs_ext_store_pblock(&nex, pblock);
+ nex.ee_len = cpu_to_le16(count);
+ err = ldiskfs_ext_insert_extent(handle, inode, path, &nex, 0);
+ if (err) {
+ /* free data blocks we just allocated */
+ /* not a good idea to call discard here directly,
+ * but otherwise we'd need to call it every free() */
+ ldiskfs_discard_preallocations(inode);
+#ifdef HAVE_EXT_FREE_BLOCK_WITH_BUFFER_HEAD /* Introduced in 2.6.32-rc7 */
+ ldiskfs_free_blocks(handle, inode, NULL,
+ ldiskfs_ext_pblock(&nex),
+ le16_to_cpu(nex.ee_len), 0);
+#else
+ ldiskfs_free_blocks(handle, inode, ldiskfs_ext_pblock(&nex),
+ le16_to_cpu(nex.ee_len), 0);
+#endif
+ goto out;
+ }
+
+ /*
+ * Putting len of the actual extent we just inserted,
+ * we are asking ldiskfs_ext_walk_space() to continue
+ * scaning after that block
+ */
+ cex->ec_len = le16_to_cpu(nex.ee_len);
+ cex->ec_start = ldiskfs_ext_pblock(&nex);
+ BUG_ON(le16_to_cpu(nex.ee_len) == 0);
+ BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
+
+out:
+ up_write((&LDISKFS_I(inode)->i_data_sem));
+ ldiskfs_journal_stop(handle);
+map:
+ if (err >= 0) {
+ /* map blocks */
+ if (bp->num == 0) {
+ CERROR("hmm. why do we find this extent?\n");
+ CERROR("initial space: %lu:%u\n",
+ bp->start, bp->init_num);
+#ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
+ CERROR("current extent: %u/%u/%llu %d\n",
+ cex->ec_block, cex->ec_len,
+ (unsigned long long)cex->ec_start,
+ cex->ec_type);
+#else
+ CERROR("current extent: %u/%u/%llu\n",
+ cex->ec_block, cex->ec_len,
+ (unsigned long long)cex->ec_start);
+#endif
+ }
+ i = 0;
+ if (cex->ec_block < bp->start)
+ i = bp->start - cex->ec_block;
+ if (i >= cex->ec_len)
+ CERROR("nothing to do?! i = %d, e_num = %u\n",
+ i, cex->ec_len);
+ for (; i < cex->ec_len && bp->num; i++) {
+ *(bp->blocks) = cex->ec_start + i;
+#ifdef LDISKFS_EXT_CACHE_EXTENT /* until kernel 2.6.37 */
+ if (cex->ec_type != LDISKFS_EXT_CACHE_EXTENT) {
+#else
+ if ((cex->ec_len == 0) || (cex->ec_start == 0)) {
+#endif
+ /* unmap any possible underlying metadata from
+ * the block device mapping. bug 6998. */
+ unmap_underlying_metadata(inode->i_sb->s_bdev,
+ *(bp->blocks));
+ }
+ bp->blocks++;
+ bp->num--;
+ bp->start++;
+ }
+ }
+ return err;
+}
+
+static int osd_ldiskfs_map_nblocks(struct inode *inode, unsigned long block,
+ unsigned long num, unsigned long *blocks,
+ int create)
+{
+ struct bpointers bp;
+ int err;
+
+ CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
+ block, block + num - 1, (unsigned) inode->i_ino);
+
+ bp.blocks = blocks;
+ bp.start = block;
+ bp.init_num = bp.num = num;
+ bp.create = create;
+
+ err = ldiskfs_ext_walk_space(inode, block, num,
+ ldiskfs_ext_new_extent_cb, &bp);
+ ldiskfs_ext_invalidate_cache(inode);
+
+ return err;
+}
+
+static int osd_ldiskfs_map_bm_inode_pages(struct inode *inode,
+ struct page **page, int pages,
+ unsigned long *blocks, int create)
+{
+ int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
+ pgoff_t bitmap_max_page_index;
+ unsigned long *b;
+ int rc = 0, i;
+
+ bitmap_max_page_index = LDISKFS_SB(inode->i_sb)->s_bitmap_maxbytes >>
+ PAGE_SHIFT;
+ for (i = 0, b = blocks; i < pages; i++, page++) {
+ if ((*page)->index + 1 >= bitmap_max_page_index) {
+ rc = -EFBIG;
+ break;
+ }
+ rc = ldiskfs_map_inode_page(inode, *page, b, create);
+ if (rc) {
+ CERROR("ino %lu, blk %lu create %d: rc %d\n",
+ inode->i_ino, *b, create, rc);
+ break;
+ }
+ b += blocks_per_page;
+ }
+ return rc;
+}
+
+static int osd_ldiskfs_map_ext_inode_pages(struct inode *inode,
+ struct page **page,
+ int pages, unsigned long *blocks,
+ int create)
+{
+ int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
+ int rc = 0, i = 0;
+ struct page *fp = NULL;
+ int clen = 0;
+ pgoff_t extent_max_page_index;
+
+ extent_max_page_index = inode->i_sb->s_maxbytes >> PAGE_SHIFT;
+
+ CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
+ inode->i_ino, pages, (*page)->index);
+
+ /* pages are sorted already. so, we just have to find
+ * contig. space and process them properly */
+ while (i < pages) {
+ if (fp == NULL) {
+ /* start new extent */
+ fp = *page++;
+ clen = 1;
+ i++;
+ continue;
+ } else if (fp->index + clen == (*page)->index) {
+ /* continue the extent */
+ page++;
+ clen++;
+ i++;
+ continue;
+ }
+
+ if (fp->index + i >= extent_max_page_index)
+ GOTO(cleanup, rc = -EFBIG);
+
+ /* process found extent */
+ rc = osd_ldiskfs_map_nblocks(inode, fp->index * blocks_per_page,
+ clen * blocks_per_page, blocks,
+ create);
+ if (rc)
+ GOTO(cleanup, rc);
+
+ /* look for next extent */
+ fp = NULL;
+ blocks += blocks_per_page * clen;
+ }
+ if (fp)
+ rc = osd_ldiskfs_map_nblocks(inode, fp->index * blocks_per_page,
+ clen * blocks_per_page, blocks,
+ create);
cleanup:
- RETURN(rc);
+ return rc;
}
-static int osd_bufs_put(const struct lu_env *env, struct dt_object *dt,
- struct niobuf_local *lnb, int npages)
+static int osd_ldiskfs_map_inode_pages(struct inode *inode, struct page **page,
+ int pages, unsigned long *blocks,
+ int create)
{
- struct osd_thread_info *oti = osd_oti_get(env);
- struct osd_iobuf *iobuf = &oti->oti_iobuf;
- struct osd_device *d = osd_obj2dev(osd_dt_obj(dt));
- int i;
+ int rc;
- /* to do IO stats, notice we do this here because
- * osd_do_bio() doesn't wait for write to complete */
- osd_fini_iobuf(d, iobuf);
+ if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL) {
+ rc = osd_ldiskfs_map_ext_inode_pages(inode, page, pages,
+ blocks, create);
+ return rc;
+ }
+ rc = osd_ldiskfs_map_bm_inode_pages(inode, page, pages, blocks, create);
- for (i = 0; i < npages; i++) {
- if (lnb[i].page == NULL)
- continue;
- LASSERT(PageLocked(lnb[i].page));
- unlock_page(lnb[i].page);
- page_cache_release(lnb[i].page);
- lu_object_put(env, &dt->do_lu);
- lnb[i].page = NULL;
- }
- RETURN(0);
+ return rc;
}
+#else
+static int osd_ldiskfs_map_inode_pages(struct inode *inode, struct page **page,
+ int pages, unsigned long *blocks,
+ int create)
+{
+ int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
+ int rc = 0, i = 0;
+ struct page *fp = NULL;
+ int clen = 0;
+ pgoff_t max_page_index;
+
+ max_page_index = inode->i_sb->s_maxbytes >> PAGE_SHIFT;
+
+ CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
+ inode->i_ino, pages, (*page)->index);
+
+ /* pages are sorted already. so, we just have to find
+ * contig. space and process them properly */
+ while (i < pages) {
+ long blen, total = 0;
+ handle_t *handle = NULL;
+ struct ldiskfs_map_blocks map = { 0 };
+
+ if (fp == NULL) { /* start new extent */
+ fp = *page++;
+ clen = 1;
+ if (++i != pages)
+ continue;
+ } else if (fp->index + clen == (*page)->index) {
+ /* continue the extent */
+ page++;
+ clen++;
+ if (++i != pages)
+ continue;
+ }
+ if (fp->index + i >= max_page_index)
+ GOTO(cleanup, rc = -EFBIG);
+ /* process found extent */
+ map.m_lblk = fp->index * blocks_per_page;
+ map.m_len = blen = clen * blocks_per_page;
+ if (create) {
+ create = LDISKFS_GET_BLOCKS_CREATE;
+ handle = ldiskfs_journal_current_handle();
+ LASSERT(handle != NULL);
+ }
+cont_map:
+ rc = ldiskfs_map_blocks(handle, inode, &map, create);
+ if (rc >= 0) {
+ int c = 0;
+ for (; total < blen && c < map.m_len; c++, total++) {
+ if (rc == 0) {
+ *(blocks + total) = 0;
+ total++;
+ break;
+ } else {
+ *(blocks + total) = map.m_pblk + c;
+ /* unmap any possible underlying
+ * metadata from the block device
+ * mapping. bug 6998. */
+ if ((map.m_flags & LDISKFS_MAP_NEW) &&
+ create)
+ unmap_underlying_metadata(
+ inode->i_sb->s_bdev,
+ map.m_pblk + c);
+ }
+ }
+ rc = 0;
+ }
+ if (rc == 0 && total < blen) {
+ map.m_lblk = fp->index * blocks_per_page + total;
+ map.m_len = blen - total;
+ goto cont_map;
+ }
+ if (rc != 0)
+ GOTO(cleanup, rc);
+
+ /* look for next extent */
+ fp = NULL;
+ blocks += blocks_per_page * clen;
+ }
+cleanup:
+ return rc;
+}
+#endif /* HAVE_LDISKFS_MAP_BLOCKS */
static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
struct niobuf_local *lnb, int npages)
RETURN(rc);
isize = i_size_read(inode);
- maxidx = ((isize + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT) - 1;
+ maxidx = ((isize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) - 1;
if (osd->od_writethrough_cache)
cache = 1;
if (isize > osd->od_readcache_max_filesize)
cache = 0;
- cfs_gettimeofday(&start);
- for (i = 0; i < npages; i++) {
+ do_gettimeofday(&start);
+ for (i = 0; i < npages; i++) {
- if (cache == 0)
- generic_error_remove_page(inode->i_mapping,
- lnb[i].page);
+ if (cache == 0)
+ generic_error_remove_page(inode->i_mapping,
+ lnb[i].lnb_page);
- /*
- * till commit the content of the page is undefined
- * we'll set it uptodate once bulk is done. otherwise
- * subsequent reads can access non-stable data
- */
- ClearPageUptodate(lnb[i].page);
+ /*
+ * till commit the content of the page is undefined
+ * we'll set it uptodate once bulk is done. otherwise
+ * subsequent reads can access non-stable data
+ */
+ ClearPageUptodate(lnb[i].lnb_page);
- if (lnb[i].len == CFS_PAGE_SIZE)
- continue;
+ if (lnb[i].lnb_len == PAGE_CACHE_SIZE)
+ continue;
- if (maxidx >= lnb[i].page->index) {
- osd_iobuf_add_page(iobuf, lnb[i].page);
- } else {
- long off;
- char *p = kmap(lnb[i].page);
+ if (maxidx >= lnb[i].lnb_page->index) {
+ osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
+ } else {
+ long off;
+ char *p = kmap(lnb[i].lnb_page);
off = lnb[i].lnb_page_offset;
if (off)
memset(p, 0, off);
- off = (lnb[i].lnb_page_offset + lnb[i].len) &
- ~CFS_PAGE_MASK;
- if (off)
- memset(p + off, 0, CFS_PAGE_SIZE - off);
- kunmap(lnb[i].page);
- }
- }
- cfs_gettimeofday(&end);
- timediff = cfs_timeval_sub(&end, &start, NULL);
- lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
+ off = (lnb[i].lnb_page_offset + lnb[i].lnb_len) &
+ ~PAGE_MASK;
+ if (off)
+ memset(p + off, 0, PAGE_CACHE_SIZE - off);
+ kunmap(lnb[i].lnb_page);
+ }
+ }
+ do_gettimeofday(&end);
+ timediff = cfs_timeval_sub(&end, &start, NULL);
+ lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
if (iobuf->dr_npages) {
- rc = osd->od_fsops->fs_map_inode_pages(inode, iobuf->dr_pages,
- iobuf->dr_npages,
- iobuf->dr_blocks,
- 0, NULL);
+ rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
+ iobuf->dr_npages,
+ iobuf->dr_blocks, 0);
if (likely(rc == 0)) {
rc = osd_do_bio(osd, inode, iobuf);
/* do IO stats for preparation reads */
}
/* Check if a block is allocated or not */
-static int osd_is_mapped(struct inode *inode, obd_size offset)
+static int osd_is_mapped(struct inode *inode, u64 offset)
{
sector_t (*fs_bmap)(struct address_space *, sector_t);
/* calculate number of extents (probably better to pass nb) */
for (i = 0; i < npages; i++) {
if (i && lnb[i].lnb_file_offset !=
- lnb[i - 1].lnb_file_offset + lnb[i - 1].len)
+ lnb[i - 1].lnb_file_offset + lnb[i - 1].lnb_len)
extents++;
if (!osd_is_mapped(inode, lnb[i].lnb_file_offset))
- quota_space += CFS_PAGE_SIZE;
+ quota_space += PAGE_CACHE_SIZE;
/* ignore quota for the whole request if any page is from
* client cache or written by root.
*
+ * XXX once we drop the 1.8 client support, the checking
+ * for whether page is from cache can be simplified as:
+ * !(lnb[i].flags & OBD_BRW_SYNC)
+ *
* XXX we could handle this on per-lnb basis as done by
* grant. */
- if ((lnb[i].flags & OBD_BRW_NOQUOTA) ||
- !(lnb[i].flags & OBD_BRW_SYNC))
+ if ((lnb[i].lnb_flags & OBD_BRW_NOQUOTA) ||
+ (lnb[i].lnb_flags & (OBD_BRW_FROM_GRANT | OBD_BRW_SYNC)) ==
+ OBD_BRW_FROM_GRANT)
ignore_quota = true;
}
oh->ot_credits += newblocks;
/* make sure the over quota flags were not set */
- lnb[0].flags &= ~(OBD_BRW_OVER_USRQUOTA | OBD_BRW_OVER_GRPQUOTA);
+ lnb[0].lnb_flags &= ~(OBD_BRW_OVER_USRQUOTA | OBD_BRW_OVER_GRPQUOTA);
- rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid,
- quota_space, oh, true, true, &flags,
- ignore_quota);
+ rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
+ quota_space, oh, osd_dt_obj(dt), true,
+ &flags, ignore_quota);
/* we need only to store the overquota flags in the first lnb for
* now, once we support multiple objects BRW, this code needs be
* revised. */
if (flags & QUOTA_FL_OVER_USRQUOTA)
- lnb[0].flags |= OBD_BRW_OVER_USRQUOTA;
+ lnb[0].lnb_flags |= OBD_BRW_OVER_USRQUOTA;
if (flags & QUOTA_FL_OVER_GRPQUOTA)
- lnb[0].flags |= OBD_BRW_OVER_GRPQUOTA;
+ lnb[0].lnb_flags |= OBD_BRW_OVER_GRPQUOTA;
RETURN(rc);
}
ll_vfs_dq_init(inode);
for (i = 0; i < npages; i++) {
- if (lnb[i].rc == -ENOSPC &&
+ if (lnb[i].lnb_rc == -ENOSPC &&
osd_is_mapped(inode, lnb[i].lnb_file_offset)) {
- /* Allow the write to proceed if overwriting an
- * existing block */
- lnb[i].rc = 0;
- }
+ /* Allow the write to proceed if overwriting an
+ * existing block */
+ lnb[i].lnb_rc = 0;
+ }
- if (lnb[i].rc) { /* ENOSPC, network RPC error, etc. */
- CDEBUG(D_INODE, "Skipping [%d] == %d\n", i,
- lnb[i].rc);
- LASSERT(lnb[i].page);
- generic_error_remove_page(inode->i_mapping,lnb[i].page);
- continue;
- }
+ if (lnb[i].lnb_rc) { /* ENOSPC, network RPC error, etc. */
+ CDEBUG(D_INODE, "Skipping [%d] == %d\n", i,
+ lnb[i].lnb_rc);
+ LASSERT(lnb[i].lnb_page);
+ generic_error_remove_page(inode->i_mapping,
+ lnb[i].lnb_page);
+ continue;
+ }
- LASSERT(PageLocked(lnb[i].page));
- LASSERT(!PageWriteback(lnb[i].page));
+ LASSERT(PageLocked(lnb[i].lnb_page));
+ LASSERT(!PageWriteback(lnb[i].lnb_page));
- if (lnb[i].lnb_file_offset + lnb[i].len > isize)
- isize = lnb[i].lnb_file_offset + lnb[i].len;
+ if (lnb[i].lnb_file_offset + lnb[i].lnb_len > isize)
+ isize = lnb[i].lnb_file_offset + lnb[i].lnb_len;
- /*
- * Since write and truncate are serialized by oo_sem, even
- * partial-page truncate should not leave dirty pages in the
- * page cache.
- */
- LASSERT(!PageDirty(lnb[i].page));
+ /*
+ * Since write and truncate are serialized by oo_sem, even
+ * partial-page truncate should not leave dirty pages in the
+ * page cache.
+ */
+ LASSERT(!PageDirty(lnb[i].lnb_page));
- SetPageUptodate(lnb[i].page);
+ SetPageUptodate(lnb[i].lnb_page);
- osd_iobuf_add_page(iobuf, lnb[i].page);
+ osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
}
if (OBD_FAIL_CHECK(OBD_FAIL_OST_MAPBLK_ENOSPC)) {
rc = -ENOSPC;
} else if (iobuf->dr_npages > 0) {
- rc = osd->od_fsops->fs_map_inode_pages(inode, iobuf->dr_pages,
- iobuf->dr_npages,
- iobuf->dr_blocks,
- 1, NULL);
+ rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
+ iobuf->dr_npages,
+ iobuf->dr_blocks, 1);
} else {
/* no pages to write, no transno is needed */
thandle->th_local = 1;
rc = osd_do_bio(osd, inode, iobuf);
/* we don't do stats here as in read path because
* write is async: we'll do this in osd_put_bufs() */
- }
+ } else {
+ osd_fini_iobuf(osd, iobuf);
+ }
if (unlikely(rc != 0)) {
/* if write fails, we should drop pages from the cache */
for (i = 0; i < npages; i++) {
- if (lnb[i].page == NULL)
- continue;
- LASSERT(PageLocked(lnb[i].page));
- generic_error_remove_page(inode->i_mapping,lnb[i].page);
- }
- }
+ if (lnb[i].lnb_page == NULL)
+ continue;
+ LASSERT(PageLocked(lnb[i].lnb_page));
+ generic_error_remove_page(inode->i_mapping,
+ lnb[i].lnb_page);
+ }
+ }
- RETURN(rc);
+ RETURN(rc);
}
static int osd_read_prep(const struct lu_env *env, struct dt_object *dt,
struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
struct timeval start, end;
unsigned long timediff;
- int rc = 0, i, m = 0, cache = 0;
+ int rc = 0, i, cache = 0, cache_hits = 0, cache_misses = 0;
+ loff_t isize;
LASSERT(inode);
if (unlikely(rc != 0))
RETURN(rc);
+ isize = i_size_read(inode);
+
if (osd->od_read_cache)
cache = 1;
- if (i_size_read(inode) > osd->od_readcache_max_filesize)
+ if (isize > osd->od_readcache_max_filesize)
cache = 0;
- cfs_gettimeofday(&start);
- for (i = 0; i < npages; i++) {
+ do_gettimeofday(&start);
+ for (i = 0; i < npages; i++) {
- if (i_size_read(inode) <= lnb[i].lnb_file_offset)
- /* If there's no more data, abort early.
- * lnb->rc == 0, so it's easy to detect later. */
- break;
+ if (isize <= lnb[i].lnb_file_offset)
+ /* If there's no more data, abort early.
+ * lnb->lnb_rc == 0, so it's easy to detect later. */
+ break;
- if (i_size_read(inode) <
- lnb[i].lnb_file_offset + lnb[i].len - 1)
- lnb[i].rc = i_size_read(inode) - lnb[i].lnb_file_offset;
- else
- lnb[i].rc = lnb[i].len;
- m += lnb[i].len;
-
- lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_ACCESS, 1);
- if (PageUptodate(lnb[i].page)) {
- lprocfs_counter_add(osd->od_stats,
- LPROC_OSD_CACHE_HIT, 1);
- } else {
- lprocfs_counter_add(osd->od_stats,
- LPROC_OSD_CACHE_MISS, 1);
- osd_iobuf_add_page(iobuf, lnb[i].page);
- }
- if (cache == 0)
- generic_error_remove_page(inode->i_mapping,lnb[i].page);
- }
- cfs_gettimeofday(&end);
- timediff = cfs_timeval_sub(&end, &start, NULL);
- lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
+ if (isize < lnb[i].lnb_file_offset + lnb[i].lnb_len - 1)
+ lnb[i].lnb_rc = isize - lnb[i].lnb_file_offset;
+ else
+ lnb[i].lnb_rc = lnb[i].lnb_len;
+
+ if (PageUptodate(lnb[i].lnb_page)) {
+ cache_hits++;
+ } else {
+ cache_misses++;
+ osd_iobuf_add_page(iobuf, lnb[i].lnb_page);
+ }
+
+ if (cache == 0)
+ generic_error_remove_page(inode->i_mapping,
+ lnb[i].lnb_page);
+ }
+ do_gettimeofday(&end);
+ timediff = cfs_timeval_sub(&end, &start, NULL);
+ lprocfs_counter_add(osd->od_stats, LPROC_OSD_GET_PAGE, timediff);
+
+ if (cache_hits != 0)
+ lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_HIT,
+ cache_hits);
+ if (cache_misses != 0)
+ lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_MISS,
+ cache_misses);
+ if (cache_hits + cache_misses != 0)
+ lprocfs_counter_add(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
+ cache_hits + cache_misses);
if (iobuf->dr_npages) {
- rc = osd->od_fsops->fs_map_inode_pages(inode, iobuf->dr_pages,
- iobuf->dr_npages,
- iobuf->dr_blocks,
- 0, NULL);
+ rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
+ iobuf->dr_npages,
+ iobuf->dr_blocks, 0);
rc = osd_do_bio(osd, inode, iobuf);
/* IO stats will be done in osd_bufs_put() */
boffs = *offs & (blocksize - 1);
csize = min(blocksize - boffs, size);
bh = ldiskfs_bread(NULL, inode, block, 0, &err);
- if (!bh) {
- CERROR("%s: can't read %u@%llu on ino %lu: rc = %d\n",
- LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
- csize, *offs, inode->i_ino, err);
- return err;
- }
+ if (err != 0) {
+ CERROR("%s: can't read %u@%llu on ino %lu: rc = %d\n",
+ LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
+ csize, *offs, inode->i_ino, err);
+ if (bh != NULL)
+ brelse(bh);
+ return err;
+ }
- memcpy(buf, bh->b_data + boffs, csize);
- brelse(bh);
+ if (bh != NULL) {
+ memcpy(buf, bh->b_data + boffs, csize);
+ brelse(bh);
+ } else {
+ memset(buf, 0, csize);
+ }
*offs += csize;
buf += csize;
}
static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
- struct lu_buf *buf, loff_t *pos,
- struct lustre_capa *capa)
+ struct lu_buf *buf, loff_t *pos)
{
struct inode *inode = osd_dt_obj(dt)->oo_inode;
int rc;
- if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
- RETURN(-EACCES);
-
/* Read small symlink from inode body as we need to maintain correct
* on-disk symlinks for ldiskfs.
*/
return rc;
}
+static inline int osd_extents_enabled(struct super_block *sb,
+ struct inode *inode)
+{
+ if (inode != NULL) {
+ if (LDISKFS_I(inode)->i_flags & LDISKFS_EXTENTS_FL)
+ return 1;
+ } else if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
+ LDISKFS_FEATURE_INCOMPAT_EXTENTS)) {
+ return 1;
+ }
+ return 0;
+}
+
+static inline int osd_calc_bkmap_credits(struct super_block *sb,
+ struct inode *inode,
+ const loff_t size,
+ const loff_t pos,
+ const int blocks)
+{
+ int credits, bits, bs, i;
+
+ bits = sb->s_blocksize_bits;
+ bs = 1 << bits;
+
+ /* legacy blockmap: 3 levels * 3 (bitmap,gd,itself)
+ * we do not expect blockmaps on the large files,
+ * so let's shrink it to 2 levels (4GB files) */
+
+ /* this is default reservation: 2 levels */
+ credits = (blocks + 2) * 3;
+
+ /* actual offset is unknown, hard to optimize */
+ if (pos == -1)
+ return credits;
+
+ /* now check for few specific cases to optimize */
+ if (pos + size <= LDISKFS_NDIR_BLOCKS * bs) {
+ /* no indirects */
+ credits = blocks;
+ /* allocate if not allocated */
+ if (inode == NULL) {
+ credits += blocks * 2;
+ return credits;
+ }
+ for (i = (pos >> bits); i < (pos >> bits) + blocks; i++) {
+ LASSERT(i < LDISKFS_NDIR_BLOCKS);
+ if (LDISKFS_I(inode)->i_data[i] == 0)
+ credits += 2;
+ }
+ } else if (pos + size <= (LDISKFS_NDIR_BLOCKS + 1024) * bs) {
+ /* single indirect */
+ credits = blocks * 3;
+ /* probably indirect block has been allocated already */
+ if (!inode || LDISKFS_I(inode)->i_data[LDISKFS_IND_BLOCK])
+ credits += 3;
+ }
+
+ return credits;
+}
+
static ssize_t osd_declare_write(const struct lu_env *env, struct dt_object *dt,
- const loff_t size, loff_t pos,
- struct thandle *handle)
+ const struct lu_buf *buf, loff_t _pos,
+ struct thandle *handle)
{
- struct osd_thandle *oh;
- int credits;
- struct inode *inode;
- int rc;
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct inode *inode = obj->oo_inode;
+ struct super_block *sb = osd_sb(osd_obj2dev(obj));
+ struct osd_thandle *oh;
+ int rc = 0, est = 0, credits, blocks, allocated = 0;
+ int bits, bs;
+ int depth, size;
+ loff_t pos;
ENTRY;
+ LASSERT(buf != NULL);
LASSERT(handle != NULL);
oh = container_of0(handle, struct osd_thandle, ot_super);
LASSERT(oh->ot_handle == NULL);
- /* XXX: size == 0 or INT_MAX indicating a catalog header update or
- * llog write, see comment in mdd_declare_llog_record().
- *
- * This hack will be removed with llog over OSD landing
- */
- if (size == DECLARE_LLOG_REWRITE)
- credits = 2;
- else if (size == DECLARE_LLOG_WRITE)
- credits = 6;
- else
- credits = osd_dto_credits_noquota[DTO_WRITE_BLOCK];
+ size = buf->lb_len;
+ bits = sb->s_blocksize_bits;
+ bs = 1 << bits;
- osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
+ if (_pos == -1) {
+ /* if this is an append, then we
+ * should expect cross-block record */
+ pos = 0;
+ } else {
+ pos = _pos;
+ }
- inode = osd_dt_obj(dt)->oo_inode;
+ /* blocks to modify */
+ blocks = ((pos + size + bs - 1) >> bits) - (pos >> bits);
+ LASSERT(blocks > 0);
+
+ if (inode != NULL && _pos != -1) {
+ /* object size in blocks */
+ est = (i_size_read(inode) + bs - 1) >> bits;
+ allocated = inode->i_blocks >> (bits - 9);
+ if (pos + size <= i_size_read(inode) && est <= allocated) {
+ /* looks like an overwrite, no need to modify tree */
+ credits = blocks;
+ /* no need to modify i_size */
+ goto out;
+ }
+ }
- /* we may declare write to non-exist llog */
- if (inode == NULL)
- RETURN(0);
+ if (osd_extents_enabled(sb, inode)) {
+ /*
+ * many concurrent threads may grow tree by the time
+ * our transaction starts. so, consider 2 is a min depth
+ * for every level we may need to allocate a new block
+ * and take some entries from the old one. so, 3 blocks
+ * to allocate (bitmap, gd, itself) + old block - 4 per
+ * level.
+ */
+ depth = inode != NULL ? ext_depth(inode) : 0;
+ depth = max(depth, 1) + 1;
+ credits = depth;
+ /* if not append, then split may need to modify
+ * existing blocks moving entries into the new ones */
+ if (_pos == -1)
+ credits += depth;
+ /* blocks to store data: bitmap,gd,itself */
+ credits += blocks * 3;
+ } else {
+ credits = osd_calc_bkmap_credits(sb, inode, size, _pos, blocks);
+ }
+ /* if inode is created as part of the transaction,
+ * then it's counted already by the creation method */
+ if (inode != NULL)
+ credits++;
+
+out:
+
+ osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
/* dt_declare_write() is usually called for system objects, such
* as llog or last_rcvd files. We needn't enforce quota on those
* objects, so always set the lqi_space as 0. */
- rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
- true, true, NULL, false);
+ if (inode != NULL)
+ rc = osd_declare_inode_qid(env, i_uid_read(inode),
+ i_gid_read(inode), 0, oh, obj, true,
+ NULL, false);
RETURN(rc);
}
err);
break;
}
- LASSERTF(boffs + size <= bh->b_size,
- "boffs %d size %d bh->b_size %lu",
- boffs, size, (unsigned long)bh->b_size);
+ LASSERTF(boffs + size <= bh->b_size,
+ "boffs %d size %d bh->b_size %lu\n",
+ boffs, size, (unsigned long)bh->b_size);
memcpy(bh->b_data + boffs, buf, size);
- err = ldiskfs_journal_dirty_metadata(handle, bh);
+ err = ldiskfs_handle_dirty_metadata(handle, NULL, bh);
if (err)
break;
}
static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
- const struct lu_buf *buf, loff_t *pos,
- struct thandle *handle, struct lustre_capa *capa,
- int ignore_quota)
+ const struct lu_buf *buf, loff_t *pos,
+ struct thandle *handle, int ignore_quota)
{
struct inode *inode = osd_dt_obj(dt)->oo_inode;
struct osd_thandle *oh;
LASSERT(dt_object_exists(dt));
- if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_WRITE))
- return -EACCES;
-
LASSERT(handle != NULL);
LASSERT(inode != NULL);
ll_vfs_dq_init(inode);
inode = osd_dt_obj(dt)->oo_inode;
LASSERT(inode);
- rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
- true, true, NULL, false);
+ rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
+ 0, oh, osd_dt_obj(dt), true, NULL, false);
RETURN(rc);
}
static int osd_punch(const struct lu_env *env, struct dt_object *dt,
- __u64 start, __u64 end, struct thandle *th,
- struct lustre_capa *capa)
+ __u64 start, __u64 end, struct thandle *th)
{
- struct osd_thandle *oh;
- struct osd_object *obj = osd_dt_obj(dt);
- struct inode *inode = obj->oo_inode;
- handle_t *h;
- tid_t tid;
- int rc, rc2 = 0;
- ENTRY;
+ struct osd_thandle *oh;
+ struct osd_object *obj = osd_dt_obj(dt);
+ struct inode *inode = obj->oo_inode;
+ handle_t *h;
+ tid_t tid;
+ int rc = 0, rc2 = 0;
+ ENTRY;
- LASSERT(end == OBD_OBJECT_EOF);
- LASSERT(dt_object_exists(dt));
- LASSERT(osd_invariant(obj));
+ LASSERT(end == OBD_OBJECT_EOF);
+ LASSERT(dt_object_exists(dt));
+ LASSERT(osd_invariant(obj));
LASSERT(inode != NULL);
ll_vfs_dq_init(inode);
- LASSERT(th);
- oh = container_of(th, struct osd_thandle, ot_super);
- LASSERT(oh->ot_handle->h_transaction != NULL);
+ LASSERT(th);
+ oh = container_of(th, struct osd_thandle, ot_super);
+ LASSERT(oh->ot_handle->h_transaction != NULL);
osd_trans_exec_op(env, th, OSD_OT_PUNCH);
- tid = oh->ot_handle->h_transaction->t_tid;
+ tid = oh->ot_handle->h_transaction->t_tid;
- rc = vmtruncate(inode, start);
+ i_size_write(inode, start);
+ ll_truncate_pagecache(inode, start);
+#ifdef HAVE_INODEOPS_TRUNCATE
+ if (inode->i_op->truncate) {
+ inode->i_op->truncate(inode);
+ } else
+#endif
+ ldiskfs_truncate(inode);
- /*
- * For a partial-page truncate, flush the page to disk immediately to
- * avoid data corruption during direct disk write. b=17397
- */
- if (rc == 0 && (start & ~CFS_PAGE_MASK) != 0)
+ /*
+ * For a partial-page truncate, flush the page to disk immediately to
+ * avoid data corruption during direct disk write. b=17397
+ */
+ if ((start & ~PAGE_MASK) != 0)
rc = filemap_fdatawrite_range(inode->i_mapping, start, start+1);
h = journal_current_handle();
RETURN(rc == 0 ? rc2 : rc);
}
+static int fiemap_check_ranges(struct inode *inode,
+ u64 start, u64 len, u64 *new_len)
+{
+ loff_t maxbytes;
+
+ *new_len = len;
+
+ if (len == 0)
+ return -EINVAL;
+
+ if (ldiskfs_test_inode_flag(inode, LDISKFS_INODE_EXTENTS))
+ maxbytes = inode->i_sb->s_maxbytes;
+ else
+ maxbytes = LDISKFS_SB(inode->i_sb)->s_bitmap_maxbytes;
+
+ if (start > maxbytes)
+ return -EFBIG;
+
+ /*
+ * Shrink request scope to what the fs can actually handle.
+ */
+ if (len > maxbytes || (maxbytes - len) < start)
+ *new_len = maxbytes - start;
+
+ return 0;
+}
+
+/* So that the fiemap access checks can't overflow on 32 bit machines. */
+#define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
+
static int osd_fiemap_get(const struct lu_env *env, struct dt_object *dt,
- struct ll_user_fiemap *fm)
+ struct fiemap *fm)
{
- struct inode *inode = osd_dt_obj(dt)->oo_inode;
- struct osd_thread_info *info = osd_oti_get(env);
- struct dentry *dentry = &info->oti_obj_dentry;
- struct file *file = &info->oti_file;
- mm_segment_t saved_fs;
- int rc;
+ struct fiemap_extent_info fieinfo = {0, };
+ struct inode *inode = osd_dt_obj(dt)->oo_inode;
+ u64 len;
+ int rc;
- LASSERT(inode);
- dentry->d_inode = inode;
- file->f_dentry = dentry;
- file->f_mapping = inode->i_mapping;
- file->f_op = inode->i_fop;
-
- saved_fs = get_fs();
- set_fs(get_ds());
- /* ldiskfs_ioctl does not have a inode argument */
- if (inode->i_fop->unlocked_ioctl)
- rc = inode->i_fop->unlocked_ioctl(file, FSFILT_IOC_FIEMAP,
- (long)fm);
- else
- rc = -ENOTTY;
- set_fs(saved_fs);
- return rc;
+
+ LASSERT(inode);
+ if (inode->i_op->fiemap == NULL)
+ return -EOPNOTSUPP;
+
+ if (fm->fm_extent_count > FIEMAP_MAX_EXTENTS)
+ return -EINVAL;
+
+ rc = fiemap_check_ranges(inode, fm->fm_start, fm->fm_length, &len);
+ if (rc)
+ return rc;
+
+ fieinfo.fi_flags = fm->fm_flags;
+ fieinfo.fi_extents_max = fm->fm_extent_count;
+ fieinfo.fi_extents_start = fm->fm_extents;
+
+ if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
+ filemap_write_and_wait(inode->i_mapping);
+
+ rc = inode->i_op->fiemap(inode, &fieinfo, fm->fm_start, len);
+ fm->fm_flags = fieinfo.fi_flags;
+ fm->fm_mapped_extents = fieinfo.fi_extents_mapped;
+
+ return rc;
}
/*
.dbo_declare_write_commit = osd_declare_write_commit,
.dbo_write_commit = osd_write_commit,
.dbo_read_prep = osd_read_prep,
- .do_declare_punch = osd_declare_punch,
- .do_punch = osd_punch,
+ .dbo_declare_punch = osd_declare_punch,
+ .dbo_punch = osd_punch,
.dbo_fiemap_get = osd_fiemap_get,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff