Changeset 0b18364 in mainline

Timestamp:

2013-07-24T20:43:38Z (11 years ago)

Author:

Ji?? Z?rev?cky <zarevucky.jiri@…>

Branches:

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

Children:

9a8c188

Parents:

cb65bbe

Message:

Implement client side of walk and open.

Location:

uspace

Files:

• lib/c/generic/vfs/vfs.c (modified) (1 diff)
• lib/c/include/ipc/vfs.h (modified) (1 diff)
• lib/c/include/vfs/vfs.h (modified) (1 diff)
• srv/vfs/vfs_ops.c (modified) (3 diffs)

uspace/lib/c/generic/vfs/vfs.c

@@ -90 +90 @@
 {
         async_exchange_end(exch);
+}
+
+int _vfs_walk(int parent, const char *path, int flags)
+{
+        async_exch_t *exch = vfs_exchange_begin();
+        
+        // TODO: assume this is done at a higher level.
+        char *precanon = str_dup(path);
+        size_t canon_size;
+        char *canon = canonify(precanon, &canon_size);
+        
+        ipc_call_t answer;
+        aid_t req = async_send_2(exch, VFS_IN_WALK, parent, flags, &answer);
+        sysarg_t rc = async_data_write_start(exch, canon, canon_size);
+        
+        free(precanon);
+        vfs_exchange_end(exch);
+                
+        sysarg_t rc_orig;
+        async_wait_for(req, &rc_orig);
+
+        if (rc_orig != EOK) {
+                return (int) rc_orig;
+        }
+                
+        if (rc != EOK) {
+                return (int) rc;
+        }
+        
+        return (int) IPC_GET_ARG1(answer);
+}
+
+int _vfs_open(int fildes, int mode)
+{
+        async_exch_t *exch = vfs_exchange_begin();
+        sysarg_t rc = async_req_2_0(exch, VFS_IN_OPEN2, fildes, mode);
+        vfs_exchange_end(exch);
+        
+        return (int) rc;
 }
 

uspace/lib/c/include/ipc/vfs.h

@@ -181 +181 @@
         //WALK_PARTIAL = (1 << 0),
         
-        WALK_ALL_FLAGS = 0,
+        WALK_MAY_CREATE = (1 << 1),
+        WALK_MUST_CREATE = (1 << 2),
+        
+        WALK_REGULAR = (1 << 3),
+        WALK_DIRECTORY = (1 << 4),
+        
+        WALK_ALL_FLAGS = WALK_MAY_CREATE | WALK_MUST_CREATE | WALK_REGULAR | WALK_DIRECTORY,
 };
 

uspace/lib/c/include/vfs/vfs.h

@@ -62 +62 @@
 extern void vfs_exchange_end(async_exch_t *);
 
+extern int _vfs_walk(int parent, const char *path, int flags);
+extern int _vfs_open(int file, int mode);
+
 #endif
 

uspace/srv/vfs/vfs_ops.c

@@ -568 +568 @@
 }
 
+static inline bool walk_flags_valid(int flags)
+{
+        if ((flags&~WALK_ALL_FLAGS) != 0) {
+                return false;
+        }
+        if ((flags&WALK_MAY_CREATE) && (flags&WALK_MUST_CREATE)) {
+                return false;
+        }
+        if ((flags&WALK_REGULAR) && (flags&WALK_DIRECTORY)) {
+                return false;
+        }
+        if ((flags&WALK_MAY_CREATE) || (flags&WALK_MUST_CREATE)) {
+                if (!(flags&WALK_DIRECTORY) && !(flags&WALK_REGULAR)) {
+                        return false;
+                }
+        }
+        return true;
+}
+
+static inline int walk_lookup_flags(int flags)
+{
+        int lflags = 0;
+        if (flags&WALK_MAY_CREATE || flags&WALK_MUST_CREATE) {
+                lflags |= L_CREATE;
+        }
+        if (flags&WALK_MUST_CREATE) {
+                lflags |= L_EXCLUSIVE;
+        }
+        if (flags&WALK_REGULAR) {
+                lflags |= L_FILE;
+        }
+        if (flags&WALK_DIRECTORY) {
+                lflags |= L_DIRECTORY;
+        }
+        return lflags;
+}
+
 void vfs_walk(ipc_callid_t rid, ipc_call_t *request)
 {
@@ -577 +614 @@
         int flags = IPC_GET_ARG2(*request);
         
-        if ((flags&~WALK_ALL_FLAGS) != 0) {
-                /* Invalid flags. */
+        if (!walk_flags_valid(flags)) {
                 async_answer_0(rid, EINVAL);
                 return;
@@ -603 +639 @@
         
         vfs_lookup_res_t lr;
-        rc = vfs_lookup_internal(path, 0, &lr, parent_node);
+        rc = vfs_lookup_internal(path, walk_lookup_flags(flags), &lr, parent_node);
         free(path);