Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd
* 'for-linus' of git://git.open-osd.org/linux-open-osd:
exofs: Fix groups code when num_devices is not divisible by group_width
exofs: Remove useless optimization
exofs: exofs_file_fsync and exofs_file_flush correctness
exofs: Remove superfluous dependency on buffer_head and writeback
diff --git a/fs/exofs/file.c b/fs/exofs/file.c
index f9bfe2b..68cb23e 100644
--- a/fs/exofs/file.c
+++ b/fs/exofs/file.c
@@ -30,9 +30,6 @@
* along with exofs; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
-#include <linux/buffer_head.h>
-
#include "exofs.h"
static int exofs_release_file(struct inode *inode, struct file *filp)
@@ -40,19 +37,27 @@
return 0;
}
+/* exofs_file_fsync - flush the inode to disk
+ *
+ * Note, in exofs all metadata is written as part of inode, regardless.
+ * The writeout is synchronous
+ */
static int exofs_file_fsync(struct file *filp, int datasync)
{
int ret;
- struct address_space *mapping = filp->f_mapping;
- struct inode *inode = mapping->host;
+ struct inode *inode = filp->f_mapping->host;
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = 0, /* metadata-only; caller takes care of data */
+ };
struct super_block *sb;
- ret = filemap_write_and_wait(mapping);
- if (ret)
- return ret;
+ if (!(inode->i_state & I_DIRTY))
+ return 0;
+ if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+ return 0;
- /* sync the inode attributes */
- ret = write_inode_now(inode, 1);
+ ret = sync_inode(inode, &wbc);
/* This is a good place to write the sb */
/* TODO: Sechedule an sb-sync on create */
@@ -65,9 +70,9 @@
static int exofs_flush(struct file *file, fl_owner_t id)
{
- exofs_file_fsync(file, 1);
+ int ret = vfs_fsync(file, 0);
/* TODO: Flush the OSD target */
- return 0;
+ return ret;
}
const struct file_operations exofs_file_operations = {
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index 088cb47..eb7368e 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -32,9 +32,6 @@
*/
#include <linux/slab.h>
-#include <linux/writeback.h>
-#include <linux/buffer_head.h>
-#include <scsi/scsi_device.h>
#include "exofs.h"
@@ -773,15 +770,13 @@
{
EXOFS_DBGMSG("page 0x%lx\n", page->index);
WARN_ON(1);
- return try_to_free_buffers(page);
+ return 0;
}
static void exofs_invalidatepage(struct page *page, unsigned long offset)
{
- EXOFS_DBGMSG("page_has_buffers=>%d\n", page_has_buffers(page));
+ EXOFS_DBGMSG("page 0x%lx offset 0x%lx\n", page->index, offset);
WARN_ON(1);
-
- block_invalidatepage(page, offset);
}
const struct address_space_operations exofs_aops = {
diff --git a/fs/exofs/ios.c b/fs/exofs/ios.c
index e273220..6550bf7 100644
--- a/fs/exofs/ios.c
+++ b/fs/exofs/ios.c
@@ -305,8 +305,6 @@
struct _striping_info {
u64 obj_offset;
u64 group_length;
- u64 total_group_length;
- u64 Major;
unsigned dev;
unsigned unit_off;
};
@@ -343,8 +341,6 @@
(M * group_depth * stripe_unit);
si->group_length = T - H;
- si->total_group_length = T;
- si->Major = M;
}
static int _add_stripe_unit(struct exofs_io_state *ios, unsigned *cur_pg,
@@ -392,20 +388,19 @@
}
static int _prepare_one_group(struct exofs_io_state *ios, u64 length,
- struct _striping_info *si, unsigned first_comp)
+ struct _striping_info *si)
{
unsigned stripe_unit = ios->layout->stripe_unit;
unsigned mirrors_p1 = ios->layout->mirrors_p1;
unsigned devs_in_group = ios->layout->group_width * mirrors_p1;
unsigned dev = si->dev;
unsigned first_dev = dev - (dev % devs_in_group);
- unsigned comp = first_comp + (dev - first_dev);
unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0;
unsigned cur_pg = ios->pages_consumed;
int ret = 0;
while (length) {
- struct exofs_per_dev_state *per_dev = &ios->per_dev[comp];
+ struct exofs_per_dev_state *per_dev = &ios->per_dev[dev];
unsigned cur_len, page_off = 0;
if (!per_dev->length) {
@@ -424,11 +419,8 @@
cur_len = stripe_unit;
}
- if (max_comp < comp)
- max_comp = comp;
-
- dev += mirrors_p1;
- dev = (dev % devs_in_group) + first_dev;
+ if (max_comp < dev)
+ max_comp = dev;
} else {
cur_len = stripe_unit;
}
@@ -440,8 +432,8 @@
if (unlikely(ret))
goto out;
- comp += mirrors_p1;
- comp = (comp % devs_in_group) + first_comp;
+ dev += mirrors_p1;
+ dev = (dev % devs_in_group) + first_dev;
length -= cur_len;
}
@@ -454,18 +446,15 @@
static int _prepare_for_striping(struct exofs_io_state *ios)
{
u64 length = ios->length;
+ u64 offset = ios->offset;
struct _striping_info si;
- unsigned devs_in_group = ios->layout->group_width *
- ios->layout->mirrors_p1;
- unsigned first_comp = 0;
int ret = 0;
- _calc_stripe_info(ios, ios->offset, &si);
-
if (!ios->pages) {
if (ios->kern_buff) {
struct exofs_per_dev_state *per_dev = &ios->per_dev[0];
+ _calc_stripe_info(ios, ios->offset, &si);
per_dev->offset = si.obj_offset;
per_dev->dev = si.dev;
@@ -479,26 +468,17 @@
}
while (length) {
+ _calc_stripe_info(ios, offset, &si);
+
if (length < si.group_length)
si.group_length = length;
- ret = _prepare_one_group(ios, si.group_length, &si, first_comp);
+ ret = _prepare_one_group(ios, si.group_length, &si);
if (unlikely(ret))
goto out;
+ offset += si.group_length;
length -= si.group_length;
-
- si.group_length = si.total_group_length;
- si.unit_off = 0;
- ++si.Major;
- si.obj_offset = si.Major * ios->layout->stripe_unit *
- ios->layout->group_depth;
-
- si.dev = (si.dev - (si.dev % devs_in_group)) + devs_in_group;
- si.dev %= ios->layout->s_numdevs;
-
- first_comp += devs_in_group;
- first_comp %= ios->layout->s_numdevs;
}
out:
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 32cfd61..047e92f 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -31,7 +31,6 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <linux/smp_lock.h>
#include <linux/string.h>
#include <linux/parser.h>
#include <linux/vfs.h>