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| author | Ralf Kirchner <ralf.kirchner@embedded-brains.de> | 2012-11-28 14:43:32 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-12-05 15:26:48 +0100 |
| commit | a20fbe78ec1a84a557ed9bcf5412b1b7c530aa35 (patch) | |
| tree | 83bb1d7d288143056a788344a768f3496a969801 /cpukit/libfs/src/dosfs/msdos_file.c | |
| parent | fstests/fsdosfsformat01: New test (diff) | |
| download | rtems-a20fbe78ec1a84a557ed9bcf5412b1b7c530aa35.tar.bz2 | |
dosfs: Block size optimization
Change block size of bdbuf to the cluster size if the data clusters are
aligned on a cluster boundary. This enables fast access to data
clusters.
Diffstat (limited to 'cpukit/libfs/src/dosfs/msdos_file.c')
| -rw-r--r-- | cpukit/libfs/src/dosfs/msdos_file.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/cpukit/libfs/src/dosfs/msdos_file.c b/cpukit/libfs/src/dosfs/msdos_file.c index 0406be0f58..a5b9c7abb2 100644 --- a/cpukit/libfs/src/dosfs/msdos_file.c +++ b/cpukit/libfs/src/dosfs/msdos_file.c @@ -191,6 +191,7 @@ msdos_file_stat( rtems_status_code sc = RTEMS_SUCCESSFUL; msdos_fs_info_t *fs_info = loc->mt_entry->fs_info; fat_file_fd_t *fat_fd = loc->node_access; + uint32_t cl_mask = fs_info->fat.vol.bpc - 1; sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, MSDOS_VOLUME_SEMAPHORE_TIMEOUT); @@ -202,8 +203,9 @@ msdos_file_stat( buf->st_mode = S_IFREG | S_IRWXU | S_IRWXG | S_IRWXO; buf->st_rdev = 0ll; buf->st_size = fat_fd->fat_file_size; - buf->st_blocks = fat_fd->fat_file_size >> FAT_SECTOR512_BITS; - buf->st_blksize = fs_info->fat.vol.bps; + buf->st_blocks = ((fat_fd->fat_file_size + cl_mask) & ~cl_mask) + >> FAT_SECTOR512_BITS; + buf->st_blksize = fs_info->fat.vol.bpc; buf->st_mtime = fat_fd->mtime; rtems_semaphore_release(fs_info->vol_sema); |