diff options
| -rw-r--r-- | libbb/inode_hash.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/libbb/inode_hash.c b/libbb/inode_hash.c index 2f02d07..f11c2af 100644 --- a/libbb/inode_hash.c +++ b/libbb/inode_hash.c @@ -11,14 +11,23 @@ #include "libbb.h" typedef struct ino_dev_hash_bucket_struct { - struct ino_dev_hash_bucket_struct *next; ino_t ino; dev_t dev; + /* + * Above fields can be 64-bit, while pointer may be 32-bit. + * Putting "next" field here may reduce size of this struct: + */ + struct ino_dev_hash_bucket_struct *next; + /* + * Reportedly, on cramfs a file and a dir can have same ino. + * Need to also remember "file/dir" bit: + */ + char isdir; /* bool */ char name[1]; } ino_dev_hashtable_bucket_t; -#define HASH_SIZE 311 /* Should be prime */ -#define hash_inode(i) ((i) % HASH_SIZE) +#define HASH_SIZE 311u /* Should be prime */ +#define hash_inode(i) ((unsigned)(i) % HASH_SIZE) /* array of [HASH_SIZE] elements */ static ino_dev_hashtable_bucket_t **ino_dev_hashtable; @@ -38,6 +47,7 @@ char* FAST_FUNC is_in_ino_dev_hashtable(const struct stat *statbuf) while (bucket != NULL) { if ((bucket->ino == statbuf->st_ino) && (bucket->dev == statbuf->st_dev) + && (bucket->isdir == !!S_ISDIR(statbuf->st_mode)) ) { return bucket->name; } @@ -52,17 +62,18 @@ void FAST_FUNC add_to_ino_dev_hashtable(const struct stat *statbuf, const char * int i; ino_dev_hashtable_bucket_t *bucket; - i = hash_inode(statbuf->st_ino); if (!name) name = ""; bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + strlen(name)); bucket->ino = statbuf->st_ino; bucket->dev = statbuf->st_dev; + bucket->isdir = !!S_ISDIR(statbuf->st_mode); strcpy(bucket->name, name); if (!ino_dev_hashtable) ino_dev_hashtable = xzalloc(HASH_SIZE * sizeof(*ino_dev_hashtable)); + i = hash_inode(statbuf->st_ino); bucket->next = ino_dev_hashtable[i]; ino_dev_hashtable[i] = bucket; } |