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Diffstat (limited to 'fs/ocfs2/localalloc.c')
-rw-r--r--fs/ocfs2/localalloc.c64
1 files changed, 53 insertions, 11 deletions
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 7e7dd65..7fe8149 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -52,7 +52,8 @@ static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc);
static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
struct ocfs2_dinode *alloc,
- u32 numbits);
+ u32 *numbits,
+ struct ocfs2_alloc_reservation *resv);
static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc);
@@ -262,6 +263,8 @@ void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
osb->local_alloc_state = OCFS2_LA_DISABLED;
+ ocfs2_resmap_uninit(&osb->osb_la_resmap);
+
main_bm_inode = ocfs2_get_system_file_inode(osb,
GLOBAL_BITMAP_SYSTEM_INODE,
OCFS2_INVALID_SLOT);
@@ -493,7 +496,7 @@ static int ocfs2_local_alloc_in_range(struct inode *inode,
alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
la = OCFS2_LOCAL_ALLOC(alloc);
- start = ocfs2_local_alloc_find_clear_bits(osb, alloc, bits_wanted);
+ start = ocfs2_local_alloc_find_clear_bits(osb, alloc, &bits_wanted, NULL);
if (start == -1) {
mlog_errno(-ENOSPC);
return 0;
@@ -659,7 +662,8 @@ int ocfs2_claim_local_alloc_bits(struct ocfs2_super *osb,
alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
la = OCFS2_LOCAL_ALLOC(alloc);
- start = ocfs2_local_alloc_find_clear_bits(osb, alloc, bits_wanted);
+ start = ocfs2_local_alloc_find_clear_bits(osb, alloc, &bits_wanted,
+ ac->ac_resv);
if (start == -1) {
/* TODO: Shouldn't we just BUG here? */
status = -ENOSPC;
@@ -669,8 +673,6 @@ int ocfs2_claim_local_alloc_bits(struct ocfs2_super *osb,
bitmap = la->la_bitmap;
*bit_off = le32_to_cpu(la->la_bm_off) + start;
- /* local alloc is always contiguous by nature -- we never
- * delete bits from it! */
*num_bits = bits_wanted;
status = ocfs2_journal_access_di(handle,
@@ -682,6 +684,9 @@ int ocfs2_claim_local_alloc_bits(struct ocfs2_super *osb,
goto bail;
}
+ ocfs2_resmap_claimed_bits(&osb->osb_la_resmap, ac->ac_resv, start,
+ bits_wanted);
+
while(bits_wanted--)
ocfs2_set_bit(start++, bitmap);
@@ -711,13 +716,17 @@ static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc)
}
static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
- struct ocfs2_dinode *alloc,
- u32 numbits)
+ struct ocfs2_dinode *alloc,
+ u32 *numbits,
+ struct ocfs2_alloc_reservation *resv)
{
int numfound, bitoff, left, startoff, lastzero;
+ int local_resv = 0;
+ struct ocfs2_alloc_reservation r;
void *bitmap = NULL;
+ struct ocfs2_reservation_map *resmap = &osb->osb_la_resmap;
- mlog_entry("(numbits wanted = %u)\n", numbits);
+ mlog_entry("(numbits wanted = %u)\n", *numbits);
if (!alloc->id1.bitmap1.i_total) {
mlog(0, "No bits in my window!\n");
@@ -725,6 +734,30 @@ static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
goto bail;
}
+ if (!resv) {
+ local_resv = 1;
+ ocfs2_resv_init_once(&r);
+ ocfs2_resv_set_type(&r, OCFS2_RESV_FLAG_TMP);
+ resv = &r;
+ }
+
+ numfound = *numbits;
+ if (ocfs2_resmap_resv_bits(resmap, resv, &bitoff, &numfound) == 0) {
+ if (numfound < *numbits)
+ *numbits = numfound;
+ goto bail;
+ }
+
+ /*
+ * Code error. While reservations are enabled, local
+ * allocation should _always_ go through them.
+ */
+ BUG_ON(osb->osb_resv_level != 0);
+
+ /*
+ * Reservations are disabled. Handle this the old way.
+ */
+
bitmap = OCFS2_LOCAL_ALLOC(alloc)->la_bitmap;
numfound = bitoff = startoff = 0;
@@ -750,7 +783,7 @@ static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
startoff = bitoff+1;
}
/* we got everything we needed */
- if (numfound == numbits) {
+ if (numfound == *numbits) {
/* mlog(0, "Found it all!\n"); */
break;
}
@@ -759,12 +792,18 @@ static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
mlog(0, "Exiting loop, bitoff = %d, numfound = %d\n", bitoff,
numfound);
- if (numfound == numbits)
+ if (numfound == *numbits) {
bitoff = startoff - numfound;
- else
+ *numbits = numfound;
+ } else {
+ numfound = 0;
bitoff = -1;
+ }
bail:
+ if (local_resv)
+ ocfs2_resv_discard(resmap, resv);
+
mlog_exit(bitoff);
return bitoff;
}
@@ -1087,6 +1126,9 @@ retry_enospc:
memset(OCFS2_LOCAL_ALLOC(alloc)->la_bitmap, 0,
le16_to_cpu(la->la_size));
+ ocfs2_resmap_restart(&osb->osb_la_resmap, cluster_count,
+ OCFS2_LOCAL_ALLOC(alloc)->la_bitmap);
+
mlog(0, "New window allocated:\n");
mlog(0, "window la_bm_off = %u\n",
OCFS2_LOCAL_ALLOC(alloc)->la_bm_off);
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