5 files changed, 94 insertions, 29 deletions

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 41a958a7585e..5e1a4fb5cacb 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1424,6 +1424,18 @@ struct elf_note_info {
         int thread_notes;
 };
 
+/*
+ * When a regset has a writeback hook, we call it on each thread before
+ * dumping user memory.  On register window machines, this makes sure the
+ * user memory backing the register data is up to date before we read it.
+ */
+static void do_thread_regset_writeback(struct task_struct *task,
+                                       const struct user_regset *regset)
+{
+        if (regset->writeback)
+                regset->writeback(task, regset, 1);
+}
+
 static int fill_thread_core_info(struct elf_thread_core_info *t,
                                  const struct user_regset_view *view,
                                  long signr, size_t *total)
@@ -1445,6 +1457,8 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
                   sizeof(t->prstatus), &t->prstatus);
         *total += notesize(&t->notes[0]);
 
+        do_thread_regset_writeback(t->task, &view->regsets[0]);
+
         /*
          * Each other regset might generate a note too.  For each regset
          * that has no core_note_type or is inactive, we leave t->notes[i]
@@ -1452,6 +1466,7 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
          */
         for (i = 1; i < view->n; ++i) {
                 const struct user_regset *regset = &view->regsets[i];
+                do_thread_regset_writeback(t->task, regset);
                 if (regset->core_note_type &&
                     (!regset->active || regset->active(t->task, regset))) {
                         int ret;
diff --git a/fs/buffer.c b/fs/buffer.c
index 897cd7477b34..ddfdd2c80bf9 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -835,7 +835,7 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list)
                 smp_mb();
                 if (buffer_dirty(bh)) {
                         list_add(&bh->b_assoc_buffers,
-                                 &bh->b_assoc_map->private_list);
+                                 &mapping->private_list);
                         bh->b_assoc_map = mapping;
                 }
                 spin_unlock(lock);
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index dc74b186145d..6df1debdccce 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -263,52 +263,102 @@ out:
         return 0;
 }
 
-/* This function must zero any hole we create */
+/**
+ * ecryptfs_prepare_write
+ * @file: The eCryptfs file
+ * @page: The eCryptfs page
+ * @from: The start byte from which we will write
+ * @to: The end byte to which we will write
+ *
+ * This function must zero any hole we create
+ *
+ * Returns zero on success; non-zero otherwise
+ */
 static int ecryptfs_prepare_write(struct file *file, struct page *page,
                                   unsigned from, unsigned to)
 {
-        int rc = 0;
         loff_t prev_page_end_size;
+        int rc = 0;
 
         if (!PageUptodate(page)) {
-                rc = ecryptfs_read_lower_page_segment(page, page->index, 0,
-                                                      PAGE_CACHE_SIZE,
-                                                      page->mapping->host);
-                if (rc) {
-                        printk(KERN_ERR "%s: Error attemping to read lower "
-                               "page segment; rc = [%d]\n", __FUNCTION__, rc);
-                        ClearPageUptodate(page);
-                        goto out;
-                } else
+                struct ecryptfs_crypt_stat *crypt_stat =
+                        &ecryptfs_inode_to_private(
+                                file->f_path.dentry->d_inode)->crypt_stat;
+
+                if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)
+                    || (crypt_stat->flags & ECRYPTFS_NEW_FILE)) {
+                        rc = ecryptfs_read_lower_page_segment(
+                                page, page->index, 0, PAGE_CACHE_SIZE,
+                                page->mapping->host);
+                        if (rc) {
+                                printk(KERN_ERR "%s: Error attemping to read "
+                                       "lower page segment; rc = [%d]\n",
+                                       __FUNCTION__, rc);
+                                ClearPageUptodate(page);
+                                goto out;
+                        } else
+                                SetPageUptodate(page);
+                } else if (crypt_stat->flags & ECRYPTFS_VIEW_AS_ENCRYPTED) {
+                        if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) {
+                                rc = ecryptfs_copy_up_encrypted_with_header(
+                                        page, crypt_stat);
+                                if (rc) {
+                                        printk(KERN_ERR "%s: Error attempting "
+                                               "to copy the encrypted content "
+                                               "from the lower file whilst "
+                                               "inserting the metadata from "
+                                               "the xattr into the header; rc "
+                                               "= [%d]\n", __FUNCTION__, rc);
+                                        ClearPageUptodate(page);
+                                        goto out;
+                                }
+                                SetPageUptodate(page);
+                        } else {
+                                rc = ecryptfs_read_lower_page_segment(
+                                        page, page->index, 0, PAGE_CACHE_SIZE,
+                                        page->mapping->host);
+                                if (rc) {
+                                        printk(KERN_ERR "%s: Error reading "
+                                               "page; rc = [%d]\n",
+                                               __FUNCTION__, rc);
+                                        ClearPageUptodate(page);
+                                        goto out;
+                                }
+                                SetPageUptodate(page);
+                        }
+                } else {
+                        rc = ecryptfs_decrypt_page(page);
+                        if (rc) {
+                                printk(KERN_ERR "%s: Error decrypting page "
+                                       "at index [%ld]; rc = [%d]\n",
+                                       __FUNCTION__, page->index, rc);
+                                ClearPageUptodate(page);
+                                goto out;
+                        }
                         SetPageUptodate(page);
+                }
         }
-
         prev_page_end_size = ((loff_t)page->index << PAGE_CACHE_SHIFT);
-
-        /*
-         * If creating a page or more of holes, zero them out via truncate.
-         * Note, this will increase i_size.
-         */
+        /* If creating a page or more of holes, zero them out via truncate.
+         * Note, this will increase i_size. */
         if (page->index != 0) {
                 if (prev_page_end_size > i_size_read(page->mapping->host)) {
                         rc = ecryptfs_truncate(file->f_path.dentry,
                                                prev_page_end_size);
                         if (rc) {
-                                printk(KERN_ERR "Error on attempt to "
+                                printk(KERN_ERR "%s: Error on attempt to "
                                        "truncate to (higher) offset [%lld];"
-                                       " rc = [%d]\n", prev_page_end_size, rc);
+                                       " rc = [%d]\n", __FUNCTION__,
+                                       prev_page_end_size, rc);
                                 goto out;
                         }
                 }
         }
-        /*
-         * Writing to a new page, and creating a small hole from start of page?
-         * Zero it out.
-         */
-        if ((i_size_read(page->mapping->host) == prev_page_end_size) &&
-            (from != 0)) {
+        /* Writing to a new page, and creating a small hole from start
+         * of page?  Zero it out. */
+        if ((i_size_read(page->mapping->host) == prev_page_end_size)
+            && (from != 0))
                 zero_user(page, 0, PAGE_CACHE_SIZE);
-        }
 out:
         return rc;
 }
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 18769cc32377..ad5360664082 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -806,8 +806,8 @@ static match_table_t tokens = {
         {Opt_quota, "quota"},
         {Opt_usrquota, "usrquota"},
         {Opt_barrier, "barrier=%u"},
-        {Opt_err, NULL},
         {Opt_resize, "resize"},
+        {Opt_err, NULL},
 };
 
 static ext3_fsblk_t get_sb_block(void **data)
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 6841452e0dea..393cc22c1717 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -2031,7 +2031,7 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
                 return -EXDEV;
         }
         /* We must not pack tails for quota files on reiserfs for quota IO to work */
-        if (!REISERFS_I(nd.path.dentry->d_inode)->i_flags & i_nopack_mask) {
+        if (!(REISERFS_I(nd.path.dentry->d_inode)->i_flags & i_nopack_mask)) {
                 reiserfs_warning(sb,
                                  "reiserfs: Quota file must have tail packing disabled.");
                 path_put(&nd.path);