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fs: change how rename() is handled

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Matheus
2025-10-17 13:51:35 -03:00
parent 36c3976c05
commit 7da3557d32
7 changed files with 282 additions and 151 deletions
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kernel-src/fs/fat/fatfs_fat.c
+17 -5
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@@ -137,7 +137,6 @@ int fatfs_cluster_chain_length(fatfs_t *fatfs, fatfs_cluster_t cluster, size_t *
if (cluster == 0)
return 0;
while (fatfs_is_cluster_eof(fatfs, cluster) == false) {
printf("chain length: %x\n", cluster);
int error = fatfs_next_cluster(fatfs, cluster, &cluster);
if (error)
return error;
@@ -275,6 +274,21 @@ int fatfs_allocate_cluster(fatfs_t *fatfs, fatfs_cluster_t reference, fatfs_clus
return error;
}
int fatfs_destroy_chain(fatfs_t *fatfs, fatfs_cluster_t cluster) {
// truncate whole file
int error = fatfs_cut_chain(fatfs, cluster);
if (error)
return error;
error = fatfs_set_next_cluster(fatfs, cluster, FATFS_CLUSTER_FREE, true);
if (error)
return error;
// [increment and update fsinfo]
return error;
}
int fatfs_resize_file(fatfs_t *fatfs, fatnode_t *fatnode, size_t new_size) {
size_t current_cluster_count = ROUND_UP(fatnode->size, fatfs->cluster_size) / fatfs->cluster_size;
size_t new_cluster_count = ROUND_UP(new_size, fatfs->cluster_size) / fatfs->cluster_size;
@@ -317,13 +331,11 @@ int fatfs_resize_file(fatfs_t *fatfs, fatnode_t *fatnode, size_t new_size) {
}
} else if (new_cluster_count == 0) {
// truncate whole file
error = fatfs_cut_chain(fatfs, fatnode->cluster);
error = fatfs_destroy_chain(fatfs, fatnode->cluster);
if (error)
return error;
error = fatfs_set_next_cluster(fatfs, fatnode->cluster, FATFS_CLUSTER_FREE, true);
if (error)
return error;
// [update fsinfo]
fatnode->cluster = 0;
fatnode->saved_cluster = 0;