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authorLinus Torvalds <torvalds@linux-foundation.org>2012-08-03 13:24:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-03 13:24:07 -0700
commitd42d1dabf34bdd5ad832cb56a7338817aad8a052 (patch)
tree3df52d49ebcf9e0a55ed542a5f68c6ff314216ac /fs/exofs
parentd79095eee26f3e2c812f1c92763d5edcb1edae60 (diff)
parent9e62bb4458ad2cf28bd701aa5fab380b846db326 (diff)
downloadlinux-d42d1dabf34bdd5ad832cb56a7338817aad8a052.tar.gz
Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd
Pull exofs update from Boaz Harrosh: "They are all mostly fixes, except the most important patch by Artem Bityutskiy which removes the use of s_dirt. After this patch s_dirt can be completely removed from the tree." * 'for-linus' of git://git.open-osd.org/linux-open-osd: ore: Fix out-of-bounds access in _ios_obj() exofs: Use proper max_IO calculations from ore exofs: Fix __r4w_get_page when offset is beyond i_size exofs: stop using s_dirt exofs: readpage_strip: Add a BUG_ON to check for PageLocked(page)
Diffstat (limited to 'fs/exofs')
-rw-r--r--fs/exofs/inode.c27
-rw-r--r--fs/exofs/ore.c14
-rw-r--r--fs/exofs/super.c11
3 files changed, 25 insertions, 27 deletions
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index 5badb0c039d..1562c27a2fa 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -37,15 +37,12 @@
#define EXOFS_DBGMSG2(M...) do {} while (0)
-enum {MAX_PAGES_KMALLOC = PAGE_SIZE / sizeof(struct page *), };
-
unsigned exofs_max_io_pages(struct ore_layout *layout,
unsigned expected_pages)
{
- unsigned pages = min_t(unsigned, expected_pages, MAX_PAGES_KMALLOC);
+ unsigned pages = min_t(unsigned, expected_pages,
+ layout->max_io_length / PAGE_SIZE);
- /* TODO: easily support bio chaining */
- pages = min_t(unsigned, pages, layout->max_io_length / PAGE_SIZE);
return pages;
}
@@ -101,7 +98,8 @@ static void _pcol_reset(struct page_collect *pcol)
* it might not end here. don't be left with nothing
*/
if (!pcol->expected_pages)
- pcol->expected_pages = MAX_PAGES_KMALLOC;
+ pcol->expected_pages =
+ exofs_max_io_pages(&pcol->sbi->layout, ~0);
}
static int pcol_try_alloc(struct page_collect *pcol)
@@ -389,6 +387,8 @@ static int readpage_strip(void *data, struct page *page)
size_t len;
int ret;
+ BUG_ON(!PageLocked(page));
+
/* FIXME: Just for debugging, will be removed */
if (PageUptodate(page))
EXOFS_ERR("PageUptodate(0x%lx, 0x%lx)\n", pcol->inode->i_ino,
@@ -572,8 +572,16 @@ static struct page *__r4w_get_page(void *priv, u64 offset, bool *uptodate)
if (!pcol->that_locked_page ||
(pcol->that_locked_page->index != index)) {
- struct page *page = find_get_page(pcol->inode->i_mapping, index);
+ struct page *page;
+ loff_t i_size = i_size_read(pcol->inode);
+
+ if (offset >= i_size) {
+ *uptodate = true;
+ EXOFS_DBGMSG("offset >= i_size index=0x%lx\n", index);
+ return ZERO_PAGE(0);
+ }
+ page = find_get_page(pcol->inode->i_mapping, index);
if (!page) {
page = find_or_create_page(pcol->inode->i_mapping,
index, GFP_NOFS);
@@ -602,12 +610,13 @@ static void __r4w_put_page(void *priv, struct page *page)
{
struct page_collect *pcol = priv;
- if (pcol->that_locked_page != page) {
+ if ((pcol->that_locked_page != page) && (ZERO_PAGE(0) != page)) {
EXOFS_DBGMSG("index=0x%lx\n", page->index);
page_cache_release(page);
return;
}
- EXOFS_DBGMSG("that_locked_page index=0x%lx\n", page->index);
+ EXOFS_DBGMSG("that_locked_page index=0x%lx\n",
+ ZERO_PAGE(0) == page ? -1 : page->index);
}
static const struct _ore_r4w_op _r4w_op = {
diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
index 24a49d47e93..1585db1aa36 100644
--- a/fs/exofs/ore.c
+++ b/fs/exofs/ore.c
@@ -837,11 +837,11 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
bio->bi_rw |= REQ_WRITE;
}
- osd_req_write(or, _ios_obj(ios, dev), per_dev->offset,
- bio, per_dev->length);
+ osd_req_write(or, _ios_obj(ios, cur_comp),
+ per_dev->offset, bio, per_dev->length);
ORE_DBGMSG("write(0x%llx) offset=0x%llx "
"length=0x%llx dev=%d\n",
- _LLU(_ios_obj(ios, dev)->id),
+ _LLU(_ios_obj(ios, cur_comp)->id),
_LLU(per_dev->offset),
_LLU(per_dev->length), dev);
} else if (ios->kern_buff) {
@@ -853,20 +853,20 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
(ios->si.unit_off + ios->length >
ios->layout->stripe_unit));
- ret = osd_req_write_kern(or, _ios_obj(ios, per_dev->dev),
+ ret = osd_req_write_kern(or, _ios_obj(ios, cur_comp),
per_dev->offset,
ios->kern_buff, ios->length);
if (unlikely(ret))
goto out;
ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx "
"length=0x%llx dev=%d\n",
- _LLU(_ios_obj(ios, dev)->id),
+ _LLU(_ios_obj(ios, cur_comp)->id),
_LLU(per_dev->offset),
_LLU(ios->length), per_dev->dev);
} else {
- osd_req_set_attributes(or, _ios_obj(ios, dev));
+ osd_req_set_attributes(or, _ios_obj(ios, cur_comp));
ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n",
- _LLU(_ios_obj(ios, dev)->id),
+ _LLU(_ios_obj(ios, cur_comp)->id),
ios->out_attr_len, dev);
}
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 433783624d1..dde41a75c7c 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -400,8 +400,6 @@ static int exofs_sync_fs(struct super_block *sb, int wait)
ret = ore_write(ios);
if (unlikely(ret))
EXOFS_ERR("%s: ore_write failed.\n", __func__);
- else
- sb->s_dirt = 0;
unlock_super(sb);
@@ -412,14 +410,6 @@ out:
return ret;
}
-static void exofs_write_super(struct super_block *sb)
-{
- if (!(sb->s_flags & MS_RDONLY))
- exofs_sync_fs(sb, 1);
- else
- sb->s_dirt = 0;
-}
-
static void _exofs_print_device(const char *msg, const char *dev_path,
struct osd_dev *od, u64 pid)
{
@@ -952,7 +942,6 @@ static const struct super_operations exofs_sops = {
.write_inode = exofs_write_inode,
.evict_inode = exofs_evict_inode,
.put_super = exofs_put_super,
- .write_super = exofs_write_super,
.sync_fs = exofs_sync_fs,
.statfs = exofs_statfs,
};