b=18721

[fs/lustre-release.git] / lustre / llite / lproc_llite.c

diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c
index cd077aa..69f8e86 100644 (file)
--- a/lustre/llite/lproc_llite.c
+++ b/lustre/llite/lproc_llite.c
@@ -266,6 +266,48 @@ static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
         return count;
 }
 
+static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
+                                          int count, int *eof, void *data)
+{
+        struct super_block *sb = data;
+        struct ll_sb_info *sbi = ll_s2sbi(sb);
+        long pages_number;
+        int mult;
+
+        spin_lock(&sbi->ll_lock);
+        pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
+        spin_unlock(&sbi->ll_lock);
+
+        mult = 1 << (20 - CFS_PAGE_SHIFT);
+        return lprocfs_read_frac_helper(page, count, pages_number, mult);
+}
+
+static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
+                                          unsigned long count, void *data)
+{
+        struct super_block *sb = data;
+        struct ll_sb_info *sbi = ll_s2sbi(sb);
+        int mult, rc, pages_number;
+
+        mult = 1 << (20 - CFS_PAGE_SHIFT);
+        rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
+        if (rc)
+                return rc;
+
+        if (pages_number < 0 ||
+                pages_number > sbi->ll_ra_info.ra_max_pages) {
+                CERROR("can't set file readahead more than"
+                       "max_read_ahead_mb %lu MB\n", sbi->ll_ra_info.ra_max_pages);
+                return -ERANGE;
+        }
+
+        spin_lock(&sbi->ll_lock);
+        sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
+        spin_unlock(&sbi->ll_lock);
+
+        return count;
+}
+
 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
                                        int count, int *eof, void *data)
 {
@@ -296,10 +338,11 @@ static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 
         /* Cap this at the current max readahead window size, the readahead
          * algorithm does this anyway so it's pointless to set it larger. */
-        if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
+        if (pages_number < 0 ||
+            pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
                 CERROR("can't set max_read_ahead_whole_mb more than "
-                       "max_read_ahead_mb: %lu\n",
-                       sbi->ll_ra_info.ra_max_pages >> (20 - CFS_PAGE_SHIFT));
+                       "max_read_ahead_per_file_mb: %lu\n",
+                        sbi->ll_ra_info.ra_max_pages_per_file >> (20 - CFS_PAGE_SHIFT));
                 return -ERANGE;
         }
 
@@ -533,6 +576,35 @@ static int ll_rd_statahead_stats(char *page, char **start, off_t off,
                         sbi->ll_sa_miss);
 }
 
+static int ll_rd_lazystatfs(char *page, char **start, off_t off,
+                            int count, int *eof, void *data)
+{
+        struct super_block *sb = data;
+        struct ll_sb_info *sbi = ll_s2sbi(sb);
+
+        return snprintf(page, count, "%u\n",
+                        (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
+}
+
+static int ll_wr_lazystatfs(struct file *file, const char *buffer,
+                            unsigned long count, void *data)
+{
+        struct super_block *sb = data;
+        struct ll_sb_info *sbi = ll_s2sbi(sb);
+        int val, rc;
+
+        rc = lprocfs_write_helper(buffer, count, &val);
+        if (rc)
+                return rc;
+
+        if (val)
+                sbi->ll_flags |= LL_SBI_LAZYSTATFS;
+        else
+                sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
+
+        return count;
+}
+
 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
         { "uuid",         ll_rd_sb_uuid,          0, 0 },
         //{ "mntpt_path",   ll_rd_path,             0, 0 },
@@ -548,6 +620,8 @@ static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
                                ll_wr_max_readahead_mb, 0 },
+        { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
+                                        ll_wr_max_readahead_per_file_mb, 0 },
         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
                                      ll_wr_max_read_ahead_whole_mb, 0 },
         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
@@ -558,6 +632,7 @@ static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
+        { "lazystatfs",         ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
         { 0 }
 };