X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fosd-ldiskfs%2Fosd_io.c;h=a0fb9698998dca4f697a8dd51f20dd14a061bbcf;hp=8600bfa6b71c31660e39d8ed240ae72c14aa388e;hb=6ea4de1b7f237d331c9e0d66f4cc53365d036e5d;hpb=0209add4a5099817111c8576afe930d1e2daef03
diff --git a/lustre/osd-ldiskfs/osd_io.c b/lustre/osd-ldiskfs/osd_io.c
index 8600bfa..a0fb969 100644
--- a/lustre/osd-ldiskfs/osd_io.c
+++ b/lustre/osd-ldiskfs/osd_io.c
@@ -27,7 +27,7 @@
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2012, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
@@ -147,9 +147,14 @@ void osd_fini_iobuf(struct osd_device *d, struct osd_iobuf *iobuf)
static void dio_complete_routine(struct bio *bio, int error)
{
- struct osd_iobuf *iobuf = bio->bi_private;
- struct bio_vec *bvl;
- int i;
+ struct osd_iobuf *iobuf = bio->bi_private;
+#ifdef HAVE_BVEC_ITER
+ struct bvec_iter iter;
+ struct bio_vec bvl;
+#else
+ int iter;
+ struct bio_vec *bvl;
+#endif
/* CAVEAT EMPTOR: possibly in IRQ context
* DO NOT record procfs stats here!!! */
@@ -158,7 +163,7 @@ static void dio_complete_routine(struct bio *bio, int error)
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 , along "
+ "report this to , 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 "
@@ -166,23 +171,23 @@ static void dio_complete_routine(struct bio *bio, int error)
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, atomic_read(&bio->bi_cnt),
- bio->bi_private);
+ 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));
- }
+ 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 {
+ } else {
atomic_dec(&iobuf->dr_dev->od_w_in_flight);
- }
+ }
/* any real error is good enough -bzzz */
if (error != 0 && iobuf->dr_error == 0)
@@ -244,13 +249,10 @@ 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,
@@ -316,23 +318,23 @@ static int osd_do_bio(struct osd_device *osd, struct inode *inode,
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),
0, queue_max_hw_segments(q));
-
- record_start_io(iobuf, bio->bi_size);
- osd_submit_bio(iobuf->dr_rw, bio);
- }
+ 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,
@@ -346,23 +348,23 @@ static int osd_do_bio(struct osd_device *osd, struct inode *inode,
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
@@ -372,6 +374,7 @@ out:
if (iobuf->dr_rw == 0) {
wait_event(iobuf->dr_wait,
atomic_read(&iobuf->dr_numreqs) == 0);
+ osd_fini_iobuf(osd, iobuf);
}
if (rc == 0)
@@ -394,11 +397,11 @@ static int osd_map_remote_to_local(loff_t offset, ssize_t len, int *nrpages,
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);
@@ -411,7 +414,7 @@ static int osd_map_remote_to_local(loff_t offset, ssize_t len, int *nrpages,
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));
@@ -432,84 +435,106 @@ struct page *osd_get_page(struct dt_object *dt, loff_t offset, int rw)
* journal_start
* i_mutex
* page lock
-
- * osd write path
- * lock page(s)
- * journal_start
- * truncate_sem
-
+ *
+ * osd write path:
+ * - lock page(s)
+ * - journal_start
+ * - truncate_sem
+ *
* 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)
-{
- struct osd_object *obj = osd_dt_obj(d);
- int npages, i, rc = 0;
+ * - lock pages, unlock
+ * - journal_start
+ * - lock partial page
+ * - i_data_sem
+ *
+ */
- LASSERT(obj->oo_inode);
+/**
+ * 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_map_remote_to_local(pos, len, &npages, lnb);
+ 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;
+ }
- for (i = 0; i < npages; i++, lnb++) {
+ RETURN(0);
+}
- /* 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;
+/**
+ * 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(dt);
+ int npages, i, rc = 0;
- lnb->page = osd_get_page(d, lnb->lnb_file_offset, rw);
- if (lnb->page == NULL)
- GOTO(cleanup, rc = -ENOMEM);
+ LASSERT(obj->oo_inode);
- /* 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));
+ osd_map_remote_to_local(pos, len, &npages, lnb);
- lu_object_get(&d->do_lu);
- }
- rc = i;
+ 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);
-cleanup:
- RETURN(rc);
-}
+ wait_on_page_writeback(lnb->lnb_page);
+ BUG_ON(PageWriteback(lnb->lnb_page));
-static int osd_bufs_put(const struct lu_env *env, struct dt_object *dt,
- struct niobuf_local *lnb, int npages)
-{
- 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;
+ lu_object_get(&dt->do_lu);
+ }
- /* 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);
+ RETURN(i);
- 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);
+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
@@ -629,7 +654,8 @@ static int ldiskfs_ext_new_extent_cb(struct inode *inode,
tgen = LDISKFS_I(inode)->i_ext_generation;
count = ldiskfs_ext_calc_credits_for_insert(inode, path);
- handle = ldiskfs_journal_start(inode, count + LDISKFS_ALLOC_NEEDED + 1);
+ handle = osd_journal_start(inode, LDISKFS_HT_MISC,
+ count + LDISKFS_ALLOC_NEEDED + 1);
if (IS_ERR(handle)) {
return PTR_ERR(handle);
}
@@ -670,11 +696,12 @@ static int ldiskfs_ext_new_extent_cb(struct inode *inode,
* 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),
- cpu_to_le16(nex.ee_len), 0);
+ 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),
- cpu_to_le16(nex.ee_len), 0);
+ le16_to_cpu(nex.ee_len), 0);
#endif
goto out;
}
@@ -736,9 +763,9 @@ map:
return err;
}
-int osd_ldiskfs_map_nblocks(struct inode *inode, unsigned long block,
- unsigned long num, unsigned long *blocks,
- int create)
+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;
@@ -758,14 +785,45 @@ int osd_ldiskfs_map_nblocks(struct inode *inode, unsigned long block,
return err;
}
-int osd_ldiskfs_map_ext_inode_pages(struct inode *inode, struct page **page,
- int pages, unsigned long *blocks,
- int create)
+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);
@@ -787,6 +845,9 @@ int osd_ldiskfs_map_ext_inode_pages(struct inode *inode, struct page **page,
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,
@@ -807,30 +868,9 @@ cleanup:
return rc;
}
-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;
- unsigned long *b;
- int rc = 0, i;
-
- for (i = 0, b = blocks; i < pages; i++, page++) {
- 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_inode_pages(struct inode *inode, struct page **page,
int pages, unsigned long *blocks,
- int create, struct mutex *optional_mutex)
+ int create)
{
int rc;
@@ -839,14 +879,94 @@ static int osd_ldiskfs_map_inode_pages(struct inode *inode, struct page **page,
blocks, create);
return rc;
}
- if (optional_mutex != NULL)
- mutex_lock(optional_mutex);
rc = osd_ldiskfs_map_bm_inode_pages(inode, page, pages, blocks, create);
- if (optional_mutex != NULL)
- mutex_unlock(optional_mutex);
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)
@@ -881,34 +1001,34 @@ static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
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 == PAGE_CACHE_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)
+ 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].page);
+ kunmap(lnb[i].lnb_page);
}
}
do_gettimeofday(&end);
@@ -918,8 +1038,7 @@ static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
if (iobuf->dr_npages) {
rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
iobuf->dr_npages,
- iobuf->dr_blocks,
- 0, NULL);
+ iobuf->dr_blocks, 0);
if (likely(rc == 0)) {
rc = osd_do_bio(osd, inode, iobuf);
/* do IO stats for preparation reads */
@@ -930,7 +1049,7 @@ static int osd_write_prep(const struct lu_env *env, struct dt_object *dt,
}
/* 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);
@@ -981,7 +1100,7 @@ static int osd_declare_write_commit(const struct lu_env *env,
/* 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))
@@ -996,8 +1115,8 @@ static int osd_declare_write_commit(const struct lu_env *env,
*
* 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_FROM_GRANT | 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;
}
@@ -1045,19 +1164,19 @@ static int osd_declare_write_commit(const struct lu_env *env,
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);
}
@@ -1084,37 +1203,38 @@ static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
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)) {
@@ -1122,8 +1242,7 @@ static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
} else if (iobuf->dr_npages > 0) {
rc = osd_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
iobuf->dr_npages,
- iobuf->dr_blocks,
- 1, NULL);
+ iobuf->dr_blocks, 1);
} else {
/* no pages to write, no transno is needed */
thandle->th_local = 1;
@@ -1139,19 +1258,22 @@ static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
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,
@@ -1163,7 +1285,8 @@ 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);
@@ -1171,47 +1294,55 @@ static int osd_read_prep(const struct lu_env *env, struct dt_object *dt,
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;
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 (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 (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);
+ 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_ldiskfs_map_inode_pages(inode, iobuf->dr_pages,
iobuf->dr_npages,
- iobuf->dr_blocks,
- 0, NULL);
+ iobuf->dr_blocks, 0);
rc = osd_do_bio(osd, inode, iobuf);
/* IO stats will be done in osd_bufs_put() */
@@ -1275,15 +1406,21 @@ int osd_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs)
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;
@@ -1293,15 +1430,11 @@ int osd_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs)
}
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.
*/
@@ -1314,36 +1447,151 @@ static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
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 struct lu_buf *buf, loff_t pos,
+ 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);
- 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);
}
@@ -1403,11 +1651,11 @@ int osd_ldiskfs_write_record(struct inode *inode, void *buf, int bufsize,
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;
@@ -1442,9 +1690,8 @@ int osd_ldiskfs_write_record(struct inode *inode, void *buf, int bufsize,
}
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;
@@ -1453,9 +1700,6 @@ static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
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);
@@ -1507,14 +1751,13 @@ static int osd_declare_punch(const struct lu_env *env, struct dt_object *dt,
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);
@@ -1543,22 +1786,15 @@ static int osd_punch(const struct lu_env *env, struct dt_object *dt,
#ifdef HAVE_INODEOPS_TRUNCATE
if (inode->i_op->truncate) {
inode->i_op->truncate(inode);
- } else {
-#endif
- if (!(inode->i_state & (I_NEW|I_FREEING)))
- mutex_lock(&inode->i_mutex);
- ldiskfs_truncate(inode);
- if (!(inode->i_state & (I_NEW|I_FREEING)))
- mutex_unlock(&inode->i_mutex);
-#ifdef HAVE_INODEOPS_TRUNCATE
- }
+ } 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 ((start & ~CFS_PAGE_MASK) != 0)
+ if ((start & ~PAGE_MASK) != 0)
rc = filemap_fdatawrite_range(inode->i_mapping, start, start+1);
h = journal_current_handle();
@@ -1580,34 +1816,68 @@ static int osd_punch(const struct lu_env *env, struct dt_object *dt,
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 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;
- dentry->d_sb = inode->i_sb;
- file->f_dentry = dentry;
- file->f_mapping = inode->i_mapping;
- file->f_op = inode->i_fop;
- set_file_inode(file, inode);
-
- 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;
}
/*