Changeset 54caa41b in mainline

Timestamp:

2011-03-24T21:30:52Z (14 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

41202a9

Parents:

cfbcd86

Message:

Link mfs_has_children() function to the libfs_ops structure

Location:

uspace/srv/fs/minixfs

Files:

• Makefile (modified) (1 diff)
• mfs.c (modified) (1 diff)
• mfs.h (modified) (3 diffs)
• mfs_inode.c (modified) (2 diffs)
• mfs_ops.c (modified) (2 diffs)

uspace/srv/fs/minixfs/Makefile ¶

@@ -38 +38 @@
         mfs_inode.c \
         mfs_read.c \
+        mfs_dentry.c \
         mfs_utils.c
 

uspace/srv/fs/minixfs/mfs.c ¶

@@ -107 +107 @@
                         mfs_stat(callid, &call);
                         break;
+                case VFS_OUT_LOOKUP:
+                        mfs_lookup(callid, &call);
+                        break;
                 default:
                         async_answer_0(callid, ENOTSUP);

uspace/srv/fs/minixfs/mfs.h ¶

@@ -96 +96 @@
         /*Block numbers for indirect zones*/
         uint32_t        i_izone[V2_NR_INDIRECT_ZONES];
+
+        bool dirty;
+};
+
+/*Generic MFS directory entry*/
+struct mfs_dentry_info {
+        uint32_t d_inum;
+        char d_name[MFS3_MAX_NAME_LEN];
+
+        bool dirty;
 };
 
@@ -113 +123 @@
 extern void mfs_mounted(ipc_callid_t rid, ipc_call_t *request);
 extern void mfs_mount(ipc_callid_t rid, ipc_call_t *request);
+extern void mfs_lookup(ipc_callid_t rid, ipc_call_t *request);
 extern aoff64_t mfs_size_get(fs_node_t *node);
 extern bool mfs_is_directory(fs_node_t *fsnode);
 extern bool mfs_is_file(fs_node_t *fsnode);
 extern char mfs_plb_get_char(unsigned pos);
+extern int mfs_has_children(bool *has_children, fs_node_t *fsnode);
 extern int mfs_root_get(fs_node_t **rfn, devmap_handle_t handle);
 extern devmap_handle_t mfs_device_get(fs_node_t *fsnode);
@@ -138 +150 @@
 int read_map(uint32_t *b, const struct mfs_node *mnode, const uint32_t pos);
 
+/*mfs_dentry.c*/
+extern struct mfs_dentry_info *
+read_directory_entry(struct mfs_node *mnode, unsigned index);
+
 #endif
 

uspace/srv/fs/minixfs/mfs_inode.c ¶

@@ -79 +79 @@
 
         block_put(b);
+        free(ino);
+        ino_i->dirty = false;
 
-        free(ino);
         return ino_i;
 
@@ -137 +138 @@
 
         block_put(b);
+        free(ino);
+        ino_i->dirty = false;
 
-        free(ino);
         return ino_i;
 

uspace/srv/fs/minixfs/mfs_ops.c ¶

@@ -54 +54 @@
         .is_file = mfs_is_file,
         .node_get = mfs_node_get,
-        .plb_get_char = mfs_plb_get_char
+        .plb_get_char = mfs_plb_get_char,
+        .has_children = mfs_has_children
 };
 
@@ -312 +313 @@
 }
 
+void mfs_lookup(ipc_callid_t rid, ipc_call_t *request)
+{
+        libfs_lookup(&mfs_libfs_ops, mfs_reg.fs_handle, rid, request);
+}
+
 char mfs_plb_get_char(unsigned pos)
 {
         return mfs_reg.plb_ro[pos % PLB_SIZE];
+}
+
+int mfs_has_children(bool *has_children, fs_node_t *fsnode)
+{
+        struct mfs_node *mnode = fsnode->data;
+        const struct mfs_ino_info *ino_i = mnode->ino_i;
+        const struct mfs_instance *inst = mnode->instance;
+        const struct mfs_sb_info *sbi = inst->sbi;
+        int i;
+
+        *has_children = false;
+
+        if (!S_ISDIR(mnode->ino_i->i_mode))
+                goto out;
+
+        struct mfs_dentry_info *d_info;
+
+        for (i = 2; i < ino_i->i_size / sbi->dirsize; ++i) {
+                d_info = read_directory_entry(mnode, i);
+
+                if (!d_info)
+                        goto out;
+
+                if (d_info->d_inum) {
+                        *has_children = true;
+                        free(d_info);
+                        break;
+                }
+
+                free(d_info);
+        }
+
+        if (*has_children)
+                mfsdebug("Has children\n");
+        else
+                mfsdebug("Has not children\n");
+
+out:
+        return EOK;
 }