6 files changed, 51 insertions, 47 deletions

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 58339393fa6e..ddd715e42a5c 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -38,8 +38,8 @@ ext4_group_t ext4_get_group_number(struct super_block *sb,
         ext4_group_t group;
 
         if (test_opt2(sb, STD_GROUP_SIZE))
-                group = (le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) +
-                         block) >>
+                group = (block -
+                         le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) >>
                         (EXT4_BLOCK_SIZE_BITS(sb) + EXT4_CLUSTER_BITS(sb) + 3);
         else
                 ext4_get_group_no_and_offset(sb, block, &group, NULL);
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index ee018d5f397e..4b8df7fbb10a 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -439,7 +439,7 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode,
                  */
                 if (!ext4_es_is_written(es) && !ext4_es_is_unwritten(es)) {
                         if (in_range(es->es_lblk, ee_block, ee_len)) {
-                                pr_warn("ES insert assertation failed for "
+                                pr_warn("ES insert assertion failed for "
                                         "inode: %lu we can find an extent "
                                         "at block [%d/%d/%llu/%c], but we "
                                         "want to add an delayed/hole extent "
@@ -458,7 +458,7 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode,
                  */
                 if (es->es_lblk < ee_block ||
                     ext4_es_pblock(es) != ee_start + es->es_lblk - ee_block) {
-                        pr_warn("ES insert assertation failed for inode: %lu "
+                        pr_warn("ES insert assertion failed for inode: %lu "
                                 "ex_status [%d/%d/%llu/%c] != "
                                 "es_status [%d/%d/%llu/%c]\n", inode->i_ino,
                                 ee_block, ee_len, ee_start,
@@ -468,7 +468,7 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode,
                 }
 
                 if (ee_status ^ es_status) {
-                        pr_warn("ES insert assertation failed for inode: %lu "
+                        pr_warn("ES insert assertion failed for inode: %lu "
                                 "ex_status [%d/%d/%llu/%c] != "
                                 "es_status [%d/%d/%llu/%c]\n", inode->i_ino,
                                 ee_block, ee_len, ee_start,
@@ -481,7 +481,7 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode,
                  * that we don't want to add an written/unwritten extent.
                  */
                 if (!ext4_es_is_delayed(es) && !ext4_es_is_hole(es)) {
-                        pr_warn("ES insert assertation failed for inode: %lu "
+                        pr_warn("ES insert assertion failed for inode: %lu "
                                 "can't find an extent at block %d but we want "
                                 "to add an written/unwritten extent "
                                 "[%d/%d/%llu/%llx]\n", inode->i_ino,
@@ -519,7 +519,7 @@ static void ext4_es_insert_extent_ind_check(struct inode *inode,
                          * We want to add a delayed/hole extent but this
                          * block has been allocated.
                          */
-                        pr_warn("ES insert assertation failed for inode: %lu "
+                        pr_warn("ES insert assertion failed for inode: %lu "
                                 "We can find blocks but we want to add a "
                                 "delayed/hole extent [%d/%d/%llu/%llx]\n",
                                 inode->i_ino, es->es_lblk, es->es_len,
@@ -527,13 +527,13 @@ static void ext4_es_insert_extent_ind_check(struct inode *inode,
                         return;
                 } else if (ext4_es_is_written(es)) {
                         if (retval != es->es_len) {
-                                pr_warn("ES insert assertation failed for "
+                                pr_warn("ES insert assertion failed for "
                                         "inode: %lu retval %d != es_len %d\n",
                                         inode->i_ino, retval, es->es_len);
                                 return;
                         }
                         if (map.m_pblk != ext4_es_pblock(es)) {
-                                pr_warn("ES insert assertation failed for "
+                                pr_warn("ES insert assertion failed for "
                                         "inode: %lu m_pblk %llu != "
                                         "es_pblk %llu\n",
                                         inode->i_ino, map.m_pblk,
@@ -549,7 +549,7 @@ static void ext4_es_insert_extent_ind_check(struct inode *inode,
                 }
         } else if (retval == 0) {
                 if (ext4_es_is_written(es)) {
-                        pr_warn("ES insert assertation failed for inode: %lu "
+                        pr_warn("ES insert assertion failed for inode: %lu "
                                 "We can't find the block but we want to add "
                                 "an written extent [%d/%d/%llu/%llx]\n",
                                 inode->i_ino, es->es_lblk, es->es_len,
@@ -632,10 +632,8 @@ out:
 }
 
 /*
- * ext4_es_insert_extent() adds a space to a extent status tree.
- *
- * ext4_es_insert_extent is called by ext4_da_write_begin and
- * ext4_es_remove_extent.
+ * ext4_es_insert_extent() adds information to an inode's extent
+ * status tree.
  *
  * Return 0 on success, error code on failure.
  */
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 0188e65e1f58..98b9bff92a8a 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -465,7 +465,7 @@ static void ext4_map_blocks_es_recheck(handle_t *handle,
         if (es_map->m_lblk != map->m_lblk ||
             es_map->m_flags != map->m_flags ||
             es_map->m_pblk != map->m_pblk) {
-                printk("ES cache assertation failed for inode: %lu "
+                printk("ES cache assertion failed for inode: %lu "
                        "es_cached ex [%d/%d/%llu/%x] != "
                        "found ex [%d/%d/%llu/%x] retval %d flags %x\n",
                        inode->i_ino, es_map->m_lblk, es_map->m_len,
@@ -558,7 +558,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
 
 #ifdef ES_AGGRESSIVE_TEST
                 if (retval != map->m_len) {
-                        printk("ES len assertation failed for inode: %lu "
+                        printk("ES len assertion failed for inode: %lu "
                                "retval %d != map->m_len %d "
                                "in %s (lookup)\n", inode->i_ino, retval,
                                map->m_len, __func__);
@@ -659,7 +659,7 @@ found:
 
 #ifdef ES_AGGRESSIVE_TEST
                 if (retval != map->m_len) {
-                        printk("ES len assertation failed for inode: %lu "
+                        printk("ES len assertion failed for inode: %lu "
                                "retval %d != map->m_len %d "
                                "in %s (allocation)\n", inode->i_ino, retval,
                                map->m_len, __func__);
@@ -1642,7 +1642,7 @@ add_delayed:
 
 #ifdef ES_AGGRESSIVE_TEST
                 if (retval != map->m_len) {
-                        printk("ES len assertation failed for inode: %lu "
+                        printk("ES len assertion failed for inode: %lu "
                                "retval %d != map->m_len %d "
                                "in %s (lookup)\n", inode->i_ino, retval,
                                map->m_len, __func__);
@@ -2163,7 +2163,7 @@ static int mpage_map_and_submit_extent(handle_t *handle,
 
         mpd->io_submit.io_end->offset =
                                 ((loff_t)map->m_lblk) << inode->i_blkbits;
-        while (map->m_len) {
+        do {
                 err = mpage_map_one_extent(handle, mpd);
                 if (err < 0) {
                         struct super_block *sb = inode->i_sb;
@@ -2201,7 +2201,7 @@ static int mpage_map_and_submit_extent(handle_t *handle,
                 err = mpage_map_and_submit_buffers(mpd);
                 if (err < 0)
                         return err;
-        }
+        } while (map->m_len);
 
         /* Update on-disk size after IO is submitted */
         disksize = ((loff_t)mpd->first_page) << PAGE_CACHE_SHIFT;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index a9ff5e5137ca..4bbbf13bd743 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4740,11 +4740,16 @@ do_more:
                  * blocks being freed are metadata. these blocks shouldn't
                  * be used until this transaction is committed
                  */
+        retry:
                 new_entry = kmem_cache_alloc(ext4_free_data_cachep, GFP_NOFS);
                 if (!new_entry) {
-                        ext4_mb_unload_buddy(&e4b);
-                        err = -ENOMEM;
-                        goto error_return;
+                        /*
+                         * We use a retry loop because
+                         * ext4_free_blocks() is not allowed to fail.
+                         */
+                        cond_resched();
+                        congestion_wait(BLK_RW_ASYNC, HZ/50);
+                        goto retry;
                 }
                 new_entry->efd_start_cluster = bit;
                 new_entry->efd_group = block_group;
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 48786cdb5e6c..6625d210fb45 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -25,6 +25,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/mm.h>
+#include <linux/ratelimit.h>
 
 #include "ext4_jbd2.h"
 #include "xattr.h"
@@ -55,7 +56,7 @@ void ext4_exit_pageio(void)
 static void buffer_io_error(struct buffer_head *bh)
 {
         char b[BDEVNAME_SIZE];
-        printk(KERN_ERR "Buffer I/O error on device %s, logical block %llu\n",
+        printk_ratelimited(KERN_ERR "Buffer I/O error on device %s, logical block %llu\n",
                         bdevname(bh->b_bdev, b),
                         (unsigned long long)bh->b_blocknr);
 }
@@ -308,6 +309,7 @@ ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end)
         return io_end;
 }
 
+/* BIO completion function for page writeback */
 static void ext4_end_bio(struct bio *bio, int error)
 {
         ext4_io_end_t *io_end = bio->bi_private;
@@ -318,18 +320,6 @@ static void ext4_end_bio(struct bio *bio, int error)
         if (test_bit(BIO_UPTODATE, &bio->bi_flags))
                 error = 0;
 
-        if (io_end->flag & EXT4_IO_END_UNWRITTEN) {
-                /*
-                 * Link bio into list hanging from io_end. We have to do it
-                 * atomically as bio completions can be racing against each
-                 * other.
-                 */
-                bio->bi_private = xchg(&io_end->bio, bio);
-        } else {
-                ext4_finish_bio(bio);
-                bio_put(bio);
-        }
-
         if (error) {
                 struct inode *inode = io_end->inode;
 
@@ -341,7 +331,24 @@ static void ext4_end_bio(struct bio *bio, int error)
                              (unsigned long long)
                              bi_sector >> (inode->i_blkbits - 9));
         }
-        ext4_put_io_end_defer(io_end);
+
+        if (io_end->flag & EXT4_IO_END_UNWRITTEN) {
+                /*
+                 * Link bio into list hanging from io_end. We have to do it
+                 * atomically as bio completions can be racing against each
+                 * other.
+                 */
+                bio->bi_private = xchg(&io_end->bio, bio);
+                ext4_put_io_end_defer(io_end);
+        } else {
+                /*
+                 * Drop io_end reference early. Inode can get freed once
+                 * we finish the bio.
+                 */
+                ext4_put_io_end_defer(io_end);
+                ext4_finish_bio(bio);
+                bio_put(bio);
+        }
 }
 
 void ext4_io_submit(struct ext4_io_submit *io)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 85b3dd60169b..bca26f34edf4 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1702,12 +1702,6 @@ static inline void ext4_show_quota_options(struct seq_file *seq,
 
         if (sbi->s_qf_names[GRPQUOTA])
                 seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
-
-        if (test_opt(sb, USRQUOTA))
-                seq_puts(seq, ",usrquota");
-
-        if (test_opt(sb, GRPQUOTA))
-                seq_puts(seq, ",grpquota");
 #endif
 }
 
@@ -3624,10 +3618,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
         sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb));
         sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb));
 
-        /* Do we have standard group size of blocksize * 8 blocks ? */
-        if (sbi->s_blocks_per_group == blocksize << 3)
-                set_opt2(sb, STD_GROUP_SIZE);
-
         for (i = 0; i < 4; i++)
                 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
         sbi->s_def_hash_version = es->s_def_hash_version;
@@ -3697,6 +3687,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
                 goto failed_mount;
         }
 
+        /* Do we have standard group size of clustersize * 8 blocks ? */
+        if (sbi->s_blocks_per_group == clustersize << 3)
+                set_opt2(sb, STD_GROUP_SIZE);
+
         /*
          * Test whether we have more sectors than will fit in sector_t,
          * and whether the max offset is addressable by the page cache.