xnu-7195.50.7.100.1.tar.gz

[apple/xnu.git] / bsd / dev / vn / shadow.c

diff --git a/bsd/dev/vn/shadow.c b/bsd/dev/vn/shadow.c
index 50e3912642a913177a9a9a330b71eafb18fd9a3a..717b9dee0f235a8e1ea95d10c5d19a7708879be3 100644 (file)
--- a/bsd/dev/vn/shadow.c
+++ b/bsd/dev/vn/shadow.c
@@ -99,7 +99,7 @@ struct shadow_map {
 
 
 typedef struct {
-       uint32_t    byte;
+       uint64_t    byte;
        uint32_t    bit;
 } bitmap_offset_t;
 
@@ -151,7 +151,7 @@ bitmap_offset(off_t where)
  *   units, using longs, then a short, then a byte, then bits.
  */
 static void
-bitmap_set(u_char * map, uint32_t start_bit, uint32_t bit_count)
+bitmap_set(u_char * map, off_t start_bit, size_t bit_count)
 {
        bitmap_offset_t     start;
        bitmap_offset_t     end;
@@ -159,7 +159,7 @@ bitmap_set(u_char * map, uint32_t start_bit, uint32_t bit_count)
        start = bitmap_offset(start_bit);
        end = bitmap_offset(start_bit + bit_count);
        if (start.byte < end.byte) {
-               uint32_t n_bytes;
+               uint64_t n_bytes;
 
                if (start.bit) {
                        map[start.byte] |= byte_set_bits(start.bit, NBBY - 1);
@@ -210,7 +210,7 @@ end:
  */
 
 static uint32_t
-bitmap_get(u_char * map, uint32_t start_bit, uint32_t bit_count,
+bitmap_get(u_char * map, off_t start_bit, size_t bit_count,
     boolean_t * ret_is_set)
 {
        uint32_t            count;
@@ -226,7 +226,7 @@ bitmap_get(u_char * map, uint32_t start_bit, uint32_t bit_count,
        count = 0;
 
        if (start.byte < end.byte) {
-               uint32_t n_bytes;
+               uint64_t n_bytes;
 
                if (start.bit) { /* try to align to a byte */
                        for (i = start.bit; i < NBBY; i++) {
@@ -311,9 +311,9 @@ done:
 }
 
 static __inline__ band_number_t
-shadow_map_block_to_band(shadow_map_t * map, uint32_t block)
+shadow_map_block_to_band(shadow_map_t * map, off_t block)
 {
-       return block / map->blocks_per_band;
+       return (band_number_t)(block / map->blocks_per_band);
 }
 
 /*
@@ -341,7 +341,7 @@ shadow_map_mapped_band(shadow_map_t * map, band_number_t band,
                                        /* remember the zero'th band */
                                        map->zeroth_band = band;
                                }
-                               *mapped_band = map->bands[band] = map->next_band++;
+                               *mapped_band = map->bands[band] = (band_number_t)map->next_band++;
                                is_mapped = TRUE;
                        }
                } else {
@@ -360,16 +360,16 @@ shadow_map_mapped_band(shadow_map_t * map, band_number_t band,
  *
  *   If called with is_write = TRUE, this function will map bands as it goes.
  */
-static uint32_t
-shadow_map_contiguous(shadow_map_t * map, uint32_t start_block,
-    uint32_t num_blocks, boolean_t is_write)
+static off_t
+shadow_map_contiguous(shadow_map_t * map, off_t start_block,
+    size_t num_blocks, boolean_t is_write)
 {
        band_number_t       band = shadow_map_block_to_band(map, start_block);
-       uint32_t            end_block = start_block + num_blocks;
+       off_t               end_block = start_block + num_blocks;
        boolean_t           is_mapped;
        band_number_t       mapped_band;
-       uint32_t            ret_end_block = end_block;
-       uint32_t            p;
+       off_t               ret_end_block = end_block;
+       off_t               p;
 
        is_mapped = shadow_map_mapped_band(map, band, is_write, &mapped_band);
        if (is_write == FALSE && is_mapped == FALSE) {
@@ -418,7 +418,7 @@ shadow_map_contiguous(shadow_map_t * map, uint32_t start_block,
  *   particularly since most of the bits will be zero.
  *   A sparse bitmap would really help in this case.
  */
-static __inline__ uint32_t
+static __inline__ size_t
 block_bitmap_size(off_t file_size, uint32_t block_size)
 {
        off_t blocks = howmany(file_size, block_size);
@@ -447,15 +447,15 @@ block_bitmap_size(off_t file_size, uint32_t block_size)
  *   should be read.
  */
 boolean_t
-shadow_map_read(shadow_map_t * map, uint32_t block_offset, uint32_t block_count,
-    uint32_t * incr_block_offset, uint32_t * incr_block_count)
+shadow_map_read(shadow_map_t * map, off_t block_offset, size_t block_count,
+    off_t * incr_block_offset, size_t * incr_block_count)
 {
        boolean_t           written = FALSE;
        uint32_t            n_blocks;
 
        if (block_offset >= map->file_size_blocks
            || (block_offset + block_count) > map->file_size_blocks) {
-               printf("shadow_map_read: request (%d, %d) exceeds file size %d\n",
+               printf("shadow_map_read: request (%lld, %lu) exceeds file size %d\n",
                    block_offset, block_count, map->file_size_blocks);
                *incr_block_count = 0;
        }
@@ -466,7 +466,7 @@ shadow_map_read(shadow_map_t * map, uint32_t block_offset, uint32_t block_count,
                *incr_block_offset = block_offset;
        } else { /* start has been written, and therefore mapped */
                band_number_t   mapped_band;
-               uint32_t                band_limit;
+               off_t           band_limit;
 
                mapped_band = map->bands[shadow_map_block_to_band(map, block_offset)];
                *incr_block_offset = mapped_band * map->blocks_per_band
@@ -498,17 +498,17 @@ shadow_map_read(shadow_map_t * map, uint32_t block_offset, uint32_t block_count,
  *   TRUE if the shadow file was grown, FALSE otherwise.
  */
 boolean_t
-shadow_map_write(shadow_map_t * map, uint32_t block_offset,
-    uint32_t block_count, uint32_t * incr_block_offset,
-    uint32_t * incr_block_count)
+shadow_map_write(shadow_map_t * map, off_t block_offset,
+    size_t block_count, off_t * incr_block_offset,
+    size_t * incr_block_count)
 {
-       uint32_t            band_limit;
+       off_t               band_limit;
        band_number_t       mapped_band;
        boolean_t           shadow_grew = FALSE;
 
        if (block_offset >= map->file_size_blocks
            || (block_offset + block_count) > map->file_size_blocks) {
-               printf("shadow_map_write: request (%d, %d) exceeds file size %d\n",
+               printf("shadow_map_write: request (%lld, %zu) exceeds file size %d\n",
                    block_offset, block_count, map->file_size_blocks);
                *incr_block_count = 0;
        }
@@ -530,7 +530,7 @@ shadow_map_write(shadow_map_t * map, uint32_t block_offset,
 }
 
 boolean_t
-shadow_map_is_written(shadow_map_t * map, uint32_t block_offset)
+shadow_map_is_written(shadow_map_t * map, off_t block_offset)
 {
        bitmap_offset_t     b;
 
@@ -564,7 +564,7 @@ shadow_map_create(off_t file_size, off_t shadow_size,
     uint32_t band_size, uint32_t block_size)
 {
        void *              block_bitmap = NULL;
-       uint32_t            bitmap_size;
+       size_t              bitmap_size;
        band_number_t *     bands = NULL;
        shadow_map_t *      map;
        uint32_t            n_bands = 0;
@@ -573,12 +573,13 @@ shadow_map_create(off_t file_size, off_t shadow_size,
                band_size = BAND_SIZE_DEFAULT;
        }
 
-       n_bands = howmany(file_size, band_size);
-       if (n_bands > (BAND_MAX + 1)) {
-               printf("file is too big: %d > %d\n",
-                   n_bands, BAND_MAX);
+       off_t many = howmany(file_size, band_size);
+       if (many > (BAND_MAX + 1)) {
+               printf("file is too big: %lld > %d\n",
+                   many, BAND_MAX);
                goto failure;
        }
+       n_bands = (uint32_t)many;
 
        /* create a block bitmap, one bit per block */
        bitmap_size = block_bitmap_size(file_size, block_size);
@@ -608,7 +609,7 @@ shadow_map_create(off_t file_size, off_t shadow_size,
        map->file_size_blocks = n_bands * map->blocks_per_band;
        map->next_band = 0;
        map->zeroth_band = -1;
-       map->shadow_size_bands = howmany(shadow_size, band_size);
+       map->shadow_size_bands = (uint32_t)howmany(shadow_size, band_size);
        map->block_size = block_size;
        return map;