Merge branch 'master' into export-slabh

7 files changed, 67 insertions, 36 deletions

diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c
index 18e8c144c7f..243c00071f7 100644
--- a/fs/logfs/dev_bdev.c
+++ b/fs/logfs/dev_bdev.c
@@ -81,6 +81,7 @@ static void writeseg_end_io(struct bio *bio, int err)
                         prefetchw(&bvec->bv_page->flags);
 
                 end_page_writeback(page);
+                page_cache_release(page);
         } while (bvec >= bio->bi_io_vec);
         bio_put(bio);
         if (atomic_dec_and_test(&super->s_pending_writes))
@@ -98,8 +99,10 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
         unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
         int i;
 
+        if (max_pages > BIO_MAX_PAGES)
+                max_pages = BIO_MAX_PAGES;
         bio = bio_alloc(GFP_NOFS, max_pages);
-        BUG_ON(!bio); /* FIXME: handle this */
+        BUG_ON(!bio);
 
         for (i = 0; i < nr_pages; i++) {
                 if (i >= max_pages) {
@@ -192,8 +195,10 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
         unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
         int i;
 
+        if (max_pages > BIO_MAX_PAGES)
+                max_pages = BIO_MAX_PAGES;
         bio = bio_alloc(GFP_NOFS, max_pages);
-        BUG_ON(!bio); /* FIXME: handle this */
+        BUG_ON(!bio);
 
         for (i = 0; i < nr_pages; i++) {
                 if (i >= max_pages) {
diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index e1cb9956610..2396a85c0f5 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -303,12 +303,12 @@ static int __logfs_readdir(struct file *file, void *buf, filldir_t filldir)
                                 (filler_t *)logfs_readpage, NULL);
                 if (IS_ERR(page))
                         return PTR_ERR(page);
-                dd = kmap_atomic(page, KM_USER0);
+                dd = kmap(page);
                 BUG_ON(dd->namelen == 0);
 
                 full = filldir(buf, (char *)dd->name, be16_to_cpu(dd->namelen),
                                 pos, be64_to_cpu(dd->ino), dd->type);
-                kunmap_atomic(dd, KM_USER0);
+                kunmap(page);
                 page_cache_release(page);
                 if (full)
                         break;
diff --git a/fs/logfs/journal.c b/fs/logfs/journal.c
index f186043e862..33bd260b830 100644
--- a/fs/logfs/journal.c
+++ b/fs/logfs/journal.c
@@ -801,6 +801,7 @@ void do_logfs_journal_wl_pass(struct super_block *sb)
 {
         struct logfs_super *super = logfs_super(sb);
         struct logfs_area *area = super->s_journal_area;
+        struct btree_head32 *head = &super->s_reserved_segments;
         u32 segno, ec;
         int i, err;
 
@@ -808,6 +809,7 @@ void do_logfs_journal_wl_pass(struct super_block *sb)
         /* Drop old segments */
         journal_for_each(i)
                 if (super->s_journal_seg[i]) {
+                        btree_remove32(head, super->s_journal_seg[i]);
                         logfs_set_segment_unreserved(sb,
                                         super->s_journal_seg[i],
                                         super->s_journal_ec[i]);
@@ -820,8 +822,13 @@ void do_logfs_journal_wl_pass(struct super_block *sb)
                 super->s_journal_seg[i] = segno;
                 super->s_journal_ec[i] = ec;
                 logfs_set_segment_reserved(sb, segno);
+                err = btree_insert32(head, segno, (void *)1, GFP_KERNEL);
+                BUG_ON(err); /* mempool should prevent this */
+                err = logfs_erase_segment(sb, segno, 1);
+                BUG_ON(err); /* FIXME: remount-ro would be nicer */
         }
         /* Manually move journal_area */
+        freeseg(sb, area->a_segno);
         area->a_segno = super->s_journal_seg[0];
         area->a_is_open = 0;
         area->a_used_bytes = 0;
diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
index 12977943137..b84b0eec602 100644
--- a/fs/logfs/logfs.h
+++ b/fs/logfs/logfs.h
@@ -587,6 +587,7 @@ void move_page_to_btree(struct page *page);
 int logfs_init_mapping(struct super_block *sb);
 void logfs_sync_area(struct logfs_area *area);
 void logfs_sync_segments(struct super_block *sb);
+void freeseg(struct super_block *sb, u32 segno);
 
 /* area handling */
 int logfs_init_areas(struct super_block *sb);
diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c
index d5919af2c7a..bff40253dfb 100644
--- a/fs/logfs/readwrite.c
+++ b/fs/logfs/readwrite.c
@@ -1595,7 +1595,6 @@ int logfs_delete(struct inode *inode, pgoff_t index,
         return ret;
 }
 
-/* Rewrite cannot mark the inode dirty but has to write it immediatly. */
 int logfs_rewrite_block(struct inode *inode, u64 bix, u64 ofs,
                 gc_level_t gc_level, long flags)
 {
@@ -1612,6 +1611,18 @@ int logfs_rewrite_block(struct inode *inode, u64 bix, u64 ofs,
                 if (level != 0)
                         alloc_indirect_block(inode, page, 0);
                 err = logfs_write_buf(inode, page, flags);
+                if (!err && shrink_level(gc_level) == 0) {
+                        /* Rewrite cannot mark the inode dirty but has to
+                         * write it immediatly.
+                         * Q: Can't we just create an alias for the inode
+                         * instead?  And if not, why not?
+                         */
+                        if (inode->i_ino == LOGFS_INO_MASTER)
+                                logfs_write_anchor(inode->i_sb);
+                        else {
+                                err = __logfs_write_inode(inode, flags);
+                        }
+                }
         }
         logfs_put_write_page(page);
         return err;
diff --git a/fs/logfs/segment.c b/fs/logfs/segment.c
index 614d7a6fda2..801a3a14162 100644
--- a/fs/logfs/segment.c
+++ b/fs/logfs/segment.c
@@ -94,50 +94,58 @@ void __logfs_buf_write(struct logfs_area *area, u64 ofs, void *buf, size_t len,
         } while (len);
 }
 
-/*
- * bdev_writeseg will write full pages.  Memset the tail to prevent data leaks.
- */
-static void pad_wbuf(struct logfs_area *area, int final)
+static void pad_partial_page(struct logfs_area *area)
 {
         struct super_block *sb = area->a_sb;
-        struct logfs_super *super = logfs_super(sb);
         struct page *page;
         u64 ofs = dev_ofs(sb, area->a_segno, area->a_used_bytes);
         pgoff_t index = ofs >> PAGE_SHIFT;
         long offset = ofs & (PAGE_SIZE-1);
         u32 len = PAGE_SIZE - offset;
 
-        if (len == PAGE_SIZE) {
-                /* The math in this function can surely use some love */
-                len = 0;
-        }
-        if (len) {
-                BUG_ON(area->a_used_bytes >= super->s_segsize);
-
-                page = get_mapping_page(area->a_sb, index, 0);
+        if (len % PAGE_SIZE) {
+                page = get_mapping_page(sb, index, 0);
                 BUG_ON(!page); /* FIXME: reserve a pool */
                 memset(page_address(page) + offset, 0xff, len);
                 SetPagePrivate(page);
                 page_cache_release(page);
         }
+}
 
-        if (!final)
-                return;
+static void pad_full_pages(struct logfs_area *area)
+{
+        struct super_block *sb = area->a_sb;
+        struct logfs_super *super = logfs_super(sb);
+        u64 ofs = dev_ofs(sb, area->a_segno, area->a_used_bytes);
+        u32 len = super->s_segsize - area->a_used_bytes;
+        pgoff_t index = PAGE_CACHE_ALIGN(ofs) >> PAGE_CACHE_SHIFT;
+        pgoff_t no_indizes = len >> PAGE_CACHE_SHIFT;
+        struct page *page;
 
-        area->a_used_bytes += len;
-        for ( ; area->a_used_bytes < super->s_segsize;
-                        area->a_used_bytes += PAGE_SIZE) {
-                /* Memset another page */
-                index++;
-                page = get_mapping_page(area->a_sb, index, 0);
+        while (no_indizes) {
+                page = get_mapping_page(sb, index, 0);
                 BUG_ON(!page); /* FIXME: reserve a pool */
-                memset(page_address(page), 0xff, PAGE_SIZE);
+                SetPageUptodate(page);
+                memset(page_address(page), 0xff, PAGE_CACHE_SIZE);
                 SetPagePrivate(page);
                 page_cache_release(page);
+                index++;
+                no_indizes--;
         }
 }
 
 /*
+ * bdev_writeseg will write full pages.  Memset the tail to prevent data leaks.
+ * Also make sure we allocate (and memset) all pages for final writeout.
+ */
+static void pad_wbuf(struct logfs_area *area, int final)
+{
+        pad_partial_page(area);
+        if (final)
+                pad_full_pages(area);
+}
+
+/*
  * We have to be careful with the alias tree.  Since lookup is done by bix,
  * it needs to be normalized, so 14, 15, 16, etc. all match when dealing with
  * indirect blocks.  So always use it through accessor functions.
@@ -684,7 +692,7 @@ int logfs_segment_delete(struct inode *inode, struct logfs_shadow *shadow)
         return 0;
 }
 
-static void freeseg(struct super_block *sb, u32 segno)
+void freeseg(struct super_block *sb, u32 segno)
 {
         struct logfs_super *super = logfs_super(sb);
         struct address_space *mapping = super->s_mapping_inode->i_mapping;
diff --git a/fs/logfs/super.c b/fs/logfs/super.c
index 46990eafe05..b60bfac3263 100644
--- a/fs/logfs/super.c
+++ b/fs/logfs/super.c
@@ -278,7 +278,7 @@ static int logfs_recover_sb(struct super_block *sb)
         }
         if (valid0 && valid1 && ds_cmp(ds0, ds1)) {
                 printk(KERN_INFO"Superblocks don't match - fixing.\n");
-                return write_one_sb(sb, super->s_devops->find_last_sb);
+                return logfs_write_sb(sb);
         }
         /* If neither is valid now, something's wrong.  Didn't we properly
          * check them before?!? */
@@ -290,6 +290,10 @@ static int logfs_make_writeable(struct super_block *sb)
 {
         int err;
 
+        err = logfs_open_segfile(sb);
+        if (err)
+                return err;
+
         /* Repair any broken superblock copies */
         err = logfs_recover_sb(sb);
         if (err)
@@ -300,10 +304,6 @@ static int logfs_make_writeable(struct super_block *sb)
         if (err)
                 return err;
 
-        err = logfs_open_segfile(sb);
-        if (err)
-                return err;
-
         /* Do one GC pass before any data gets dirtied */
         logfs_gc_pass(sb);
 
@@ -329,7 +329,7 @@ static int logfs_get_sb_final(struct super_block *sb, struct vfsmount *mnt)
 
         sb->s_root = d_alloc_root(rootdir);
         if (!sb->s_root)
-                goto fail;
+                goto fail2;
 
         super->s_erase_page = alloc_pages(GFP_KERNEL, 0);
         if (!super->s_erase_page)
@@ -573,8 +573,7 @@ int logfs_get_sb_device(struct file_system_type *type, int flags,
         return 0;
 
 err1:
-        up_write(&sb->s_umount);
-        deactivate_super(sb);
+        deactivate_locked_super(sb);
         return err;
 err0:
         kfree(super);