ceph: rename rsize -> rasize

It controls readahead.

Signed-off-by: Sage Weil <sage@newdream.net>

2 files changed, 16 insertions, 6 deletions

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 88bacaf385d9..387addbf942e 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -114,6 +114,7 @@ static int ceph_sync_fs(struct super_block *sb, int wait)
 enum {
         Opt_wsize,
         Opt_rsize,
+        Opt_rasize,
         Opt_caps_wanted_delay_min,
         Opt_caps_wanted_delay_max,
         Opt_cap_release_safety,
@@ -136,6 +137,7 @@ enum {
 static match_table_t fsopt_tokens = {
         {Opt_wsize, "wsize=%d"},
         {Opt_rsize, "rsize=%d"},
+        {Opt_rasize, "rasize=%d"},
         {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
         {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
         {Opt_cap_release_safety, "cap_release_safety=%d"},
@@ -196,6 +198,9 @@ static int parse_fsopt_token(char *c, void *private)
         case Opt_rsize:
                 fsopt->rsize = intval;
                 break;
+        case Opt_rasize:
+                fsopt->rasize = intval;
+                break;
         case Opt_caps_wanted_delay_min:
                 fsopt->caps_wanted_delay_min = intval;
                 break;
@@ -293,6 +298,7 @@ static int parse_mount_options(struct ceph_mount_options **pfsopt,
         fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;
 
         fsopt->rsize = CEPH_RSIZE_DEFAULT;
+        fsopt->rasize = CEPH_RASIZE_DEFAULT;
         fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
         fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
         fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
@@ -376,6 +382,8 @@ static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt)
                 seq_printf(m, ",wsize=%d", fsopt->wsize);
         if (fsopt->rsize != CEPH_RSIZE_DEFAULT)
                 seq_printf(m, ",rsize=%d", fsopt->rsize);
+        if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
+                seq_printf(m, ",rasize=%d", fsopt->rsize);
         if (fsopt->congestion_kb != default_congestion_kb())
                 seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
         if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
@@ -774,10 +782,10 @@ static int ceph_register_bdi(struct super_block *sb,
 {
         int err;
 
-        /* set ra_pages based on rsize mount option? */
-        if (fsc->mount_options->rsize >= PAGE_CACHE_SIZE)
+        /* set ra_pages based on rasize mount option? */
+        if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE)
                 fsc->backing_dev_info.ra_pages =
-                        (fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1)
+                        (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1)
                         >> PAGE_SHIFT;
         else
                 fsc->backing_dev_info.ra_pages =
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index a23eed526f05..5c72430b8f71 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -36,7 +36,8 @@
 #define ceph_test_mount_opt(fsc, opt) \
         (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
 
-#define CEPH_RSIZE_DEFAULT             (512*1024) /* readahead */
+#define CEPH_RSIZE_DEFAULT             0           /* max read size */
+#define CEPH_RASIZE_DEFAULT            (8192*1024) /* readahead */
 #define CEPH_MAX_READDIR_DEFAULT        1024
 #define CEPH_MAX_READDIR_BYTES_DEFAULT  (512*1024)
 #define CEPH_SNAPDIRNAME_DEFAULT        ".snap"
@@ -45,8 +46,9 @@ struct ceph_mount_options {
         int flags;
         int sb_flags;
 
-        int wsize;
-        int rsize;            /* max readahead */
+        int wsize;            /* max write size */
+        int rsize;            /* max read size */
+        int rasize;           /* max readahead */
         int congestion_kb;    /* max writeback in flight */
         int caps_wanted_delay_min, caps_wanted_delay_max;
         int cap_release_safety;