tpm: Convert drivers to use SPDX

[karo-tx-uboot.git] / fs / ext4 / ext4fs.c

diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index 1954afb91d8817109a8022ee1a7e136fd259d580..258b93791b642e66a791467898e83f12b7a8c832 100644 (file)
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -18,25 +18,14 @@
  *
  * ext4write : Based on generic ext4 protocol.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
 #include <ext_common.h>
 #include <ext4fs.h>
 #include "ext4_common.h"
+#include <div64.h>
 
 int ext4fs_symlinknest;
 struct ext_filesystem ext_fs;
@@ -57,21 +46,21 @@ void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot)
  * Optimized read file API : collects and defers contiguous sector
  * reads into one potentially more efficient larger sequential read action
  */
-int ext4fs_read_file(struct ext2fs_node *node, int pos,
-               unsigned int len, char *buf)
+int ext4fs_read_file(struct ext2fs_node *node, loff_t pos,
+               loff_t len, char *buf, loff_t *actread)
 {
        struct ext_filesystem *fs = get_fs();
        int i;
-       int blockcnt;
+       lbaint_t blockcnt;
        int log2blksz = fs->dev_desc->log2blksz;
        int log2_fs_blocksize = LOG2_BLOCK_SIZE(node->data) - log2blksz;
        int blocksize = (1 << (log2_fs_blocksize + log2blksz));
        unsigned int filesize = __le32_to_cpu(node->inode.size);
-       int previous_block_number = -1;
-       int delayed_start = 0;
-       int delayed_extent = 0;
-       int delayed_skipfirst = 0;
-       int delayed_next = 0;
+       lbaint_t previous_block_number = -1;
+       lbaint_t delayed_start = 0;
+       lbaint_t delayed_extent = 0;
+       lbaint_t delayed_skipfirst = 0;
+       lbaint_t delayed_next = 0;
        char *delayed_buf = NULL;
        short status;
 
@@ -79,11 +68,11 @@ int ext4fs_read_file(struct ext2fs_node *node, int pos,
        if (len > filesize)
                len = filesize;
 
-       blockcnt = ((len + pos) + blocksize - 1) / blocksize;
+       blockcnt = lldiv(((len + pos) + blocksize - 1), blocksize);
 
-       for (i = pos / blocksize; i < blockcnt; i++) {
-               int blknr;
-               int blockoff = pos % blocksize;
+       for (i = lldiv(pos, blocksize); i < blockcnt; i++) {
+               lbaint_t blknr;
+               int blockoff = pos - (blocksize * i);
                int blockend = blocksize;
                int skipfirst = 0;
                blknr = read_allocated_block(&(node->inode), i);
@@ -94,7 +83,7 @@ int ext4fs_read_file(struct ext2fs_node *node, int pos,
 
                /* Last block.  */
                if (i == blockcnt - 1) {
-                       blockend = (len + pos) % blocksize;
+                       blockend = (len + pos) - (blocksize * i);
 
                        /* The last portion is exactly blocksize. */
                        if (!blockend)
@@ -102,7 +91,7 @@ int ext4fs_read_file(struct ext2fs_node *node, int pos,
                }
 
                /* First block. */
-               if (i == pos / blocksize) {
+               if (i == lldiv(pos, blocksize)) {
                        skipfirst = blockoff;
                        blockend -= skipfirst;
                }
@@ -162,7 +151,8 @@ int ext4fs_read_file(struct ext2fs_node *node, int pos,
                previous_block_number = -1;
        }
 
-       return len;
+       *actread  = len;
+       return 0;
 }
 
 int ext4fs_ls(const char *dirname)
@@ -186,12 +176,26 @@ int ext4fs_ls(const char *dirname)
        return 0;
 }
 
-int ext4fs_read(char *buf, unsigned len)
+int ext4fs_exists(const char *filename)
+{
+       loff_t file_len;
+       int ret;
+
+       ret = ext4fs_open(filename, &file_len);
+       return ret == 0;
+}
+
+int ext4fs_size(const char *filename, loff_t *size)
+{
+       return ext4fs_open(filename, size);
+}
+
+int ext4fs_read(char *buf, loff_t len, loff_t *actread)
 {
        if (ext4fs_root == NULL || ext4fs_file == NULL)
                return 0;
 
-       return ext4fs_read_file(ext4fs_file, 0, len, buf);
+       return ext4fs_read_file(ext4fs_file, 0, len, buf, actread);
 }
 
 int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
@@ -207,18 +211,19 @@ int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
        return 0;
 }
 
-int ext4_read_file(const char *filename, void *buf, int offset, int len)
+int ext4_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
+                  loff_t *len_read)
 {
-       int file_len;
-       int len_read;
+       loff_t file_len;
+       int ret;
 
        if (offset != 0) {
                printf("** Cannot support non-zero offset **\n");
                return -1;
        }
 
-       file_len = ext4fs_open(filename);
-       if (file_len < 0) {
+       ret = ext4fs_open(filename, &file_len);
+       if (ret < 0) {
                printf("** File not found %s **\n", filename);
                return -1;
        }
@@ -226,7 +231,20 @@ int ext4_read_file(const char *filename, void *buf, int offset, int len)
        if (len == 0)
                len = file_len;
 
-       len_read = ext4fs_read(buf, len);
+       return ext4fs_read(buf, len, len_read);
+}
+
+int ext4fs_uuid(char *uuid_str)
+{
+       if (ext4fs_root == NULL)
+               return -1;
 
-       return len_read;
+#ifdef CONFIG_LIB_UUID
+       uuid_bin_to_str((unsigned char *)ext4fs_root->sblock.unique_id,
+                       uuid_str, UUID_STR_FORMAT_STD);
+
+       return 0;
+#else
+       return -ENOSYS;
+#endif
 }