LU-9312 hsm: add a cookie indexed request hash

[fs/lustre-release.git] / lustre / lov / lov_offset.c

diff --git a/lustre/lov/lov_offset.c b/lustre/lov/lov_offset.c
index ba93d76..3ff0a38 100644 (file)
--- a/lustre/lov/lov_offset.c
+++ b/lustre/lov/lov_offset.c
@@ -38,21 +38,29 @@
 
 #include "lov_internal.h"
 
+static loff_t stripe_width(struct lov_stripe_md *lsm, unsigned int index)
+{
+       struct lov_stripe_md_entry *entry = lsm->lsm_entries[index];
+
+       LASSERT(index < lsm->lsm_entry_count);
+
+       return (loff_t)entry->lsme_stripe_size * entry->lsme_stripe_count;
+}
+
 /* compute object size given "stripeno" and the ost size */
-u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size, int stripeno)
+u64 lov_stripe_size(struct lov_stripe_md *lsm, int index, u64 ost_size,
+                   int stripeno)
 {
-       unsigned long ssize = lsm->lsm_entries[0]->lsme_stripe_size;
+       unsigned long ssize = lsm->lsm_entries[index]->lsme_stripe_size;
        unsigned long stripe_size;
        loff_t swidth;
        loff_t lov_size;
-       u32 magic = lsm->lsm_magic;
         ENTRY;
 
         if (ost_size == 0)
                 RETURN(0);
 
-        LASSERT(lsm_op_find(magic) != NULL);
-        lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, NULL, &swidth);
+       swidth = stripe_width(lsm, index);
 
        /* lov_do_div64(a, b) returns a % b, and a = a / b */
        stripe_size = lov_do_div64(ost_size, ssize);
@@ -67,12 +75,13 @@ u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size, int stripeno)
 /**
  * Compute file level page index by stripe level page offset
  */
-pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
-                        int stripe)
+pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, int index,
+                        pgoff_t stripe_index, int stripe)
 {
        loff_t offset;
 
-       offset = lov_stripe_size(lsm, (stripe_index << PAGE_SHIFT) + 1,
+       offset = lov_stripe_size(lsm, index,
+                                (stripe_index << PAGE_SHIFT) + 1,
                                 stripe);
        return offset >> PAGE_SHIFT;
 }
@@ -125,14 +134,13 @@ pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
  * was moved forward to the start of the stripe in question;  0 when it
  * falls in the stripe and no shifting was done; > 0 when the offset
  * was outside the stripe and was pulled back to its final byte. */
-int lov_stripe_offset(struct lov_stripe_md *lsm, loff_t lov_off, int stripeno,
-                     loff_t *obdoff)
+int lov_stripe_offset(struct lov_stripe_md *lsm, int index, loff_t lov_off,
+                     int stripeno, loff_t *obdoff)
 {
-       unsigned long ssize  = lsm->lsm_entries[0]->lsme_stripe_size;
+       unsigned long ssize  = lsm->lsm_entries[index]->lsme_stripe_size;
        loff_t stripe_off;
        loff_t this_stripe;
        loff_t swidth;
-       u32 magic = lsm->lsm_magic;
         int ret = 0;
 
         if (lov_off == OBD_OBJECT_EOF) {
@@ -140,9 +148,7 @@ int lov_stripe_offset(struct lov_stripe_md *lsm, loff_t lov_off, int stripeno,
                 return 0;
         }
 
-        LASSERT(lsm_op_find(magic) != NULL);
-        lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &lov_off,
-                                                &swidth);
+       swidth = stripe_width(lsm, index);
 
        /* lov_do_div64(a, b) returns a % b, and a = a / b */
        stripe_off = lov_do_div64(lov_off, swidth);
@@ -183,21 +189,18 @@ int lov_stripe_offset(struct lov_stripe_md *lsm, loff_t lov_off, int stripeno,
  * |    0    |     1     |     2     |    0    |     1     |     2     |
  * ---------------------------------------------------------------------
  */
-loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size,
+loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, int index, u64 file_size,
                          int stripeno)
 {
-       unsigned long ssize  = lsm->lsm_entries[0]->lsme_stripe_size;
+       unsigned long ssize = lsm->lsm_entries[index]->lsme_stripe_size;
        loff_t stripe_off;
        loff_t this_stripe;
        loff_t swidth;
-       u32 magic = lsm->lsm_magic;
 
         if (file_size == OBD_OBJECT_EOF)
                 return OBD_OBJECT_EOF;
 
-        LASSERT(lsm_op_find(magic) != NULL);
-        lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &file_size,
-                                                &swidth);
+       swidth = stripe_width(lsm, index);
 
        /* lov_do_div64(a, b) returns a % b, and a = a / b */
        stripe_off = lov_do_div64(file_size, swidth);
@@ -226,13 +229,23 @@ loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size,
 /* given an extent in an lov and a stripe, calculate the extent of the stripe
  * that is contained within the lov extent.  this returns true if the given
  * stripe does intersect with the lov extent. */
-int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
-                         u64 start, u64 end, u64 *obd_start, u64 *obd_end)
+int lov_stripe_intersects(struct lov_stripe_md *lsm, int index, int stripeno,
+                         struct lu_extent *ext, u64 *obd_start, u64 *obd_end)
 {
+       struct lov_stripe_md_entry *entry = lsm->lsm_entries[index];
+       u64 start, end;
         int start_side, end_side;
 
-        start_side = lov_stripe_offset(lsm, start, stripeno, obd_start);
-        end_side = lov_stripe_offset(lsm, end, stripeno, obd_end);
+       if (!lu_extent_is_overlapped(ext, &entry->lsme_extent))
+                       return 0;
+
+       start = max_t(__u64, ext->e_start, entry->lsme_extent.e_start);
+       end = min_t(__u64, ext->e_end, entry->lsme_extent.e_end);
+       if (end != OBD_OBJECT_EOF)
+               end--;
+
+       start_side = lov_stripe_offset(lsm, index, start, stripeno, obd_start);
+       end_side = lov_stripe_offset(lsm, index, end, stripeno, obd_end);
 
        CDEBUG(D_INODE, "[%lld->%lld] -> [(%d) %lld->%lld (%d)]\n",
                start, end, start_side, *obd_start, *obd_end, end_side);
@@ -258,15 +271,13 @@ int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
 }
 
 /* compute which stripe number "lov_off" will be written into */
-int lov_stripe_number(struct lov_stripe_md *lsm, loff_t lov_off)
+int lov_stripe_number(struct lov_stripe_md *lsm, int index, loff_t lov_off)
 {
-       unsigned long ssize  = lsm->lsm_entries[0]->lsme_stripe_size;
+       unsigned long ssize = lsm->lsm_entries[index]->lsme_stripe_size;
        loff_t stripe_off;
        loff_t swidth;
-       u32 magic = lsm->lsm_magic;
 
-       LASSERT(lsm_op_find(magic) != NULL);
-       lsm_op_find(magic)->lsm_stripe_by_offset(lsm, NULL, &lov_off, &swidth);
+       swidth = stripe_width(lsm, index);
 
        stripe_off = lov_do_div64(lov_off, swidth);