include, vfs: statvfs, fstatvfs calls, contributed by Buccapatnam Tirumala, Gautam.

include/minix/callnr.h

@@ -73,6 +73,8 @@
 #define GETDENTS	  80	/* to FS */
 #define LLSEEK		  81	/* to VFS */
 #define FSTATFS	 	  82	/* to VFS */
+#define STATVFS 	  83	/* to VFS */
+#define FSTATVFS 	  84	/* to VFS */
 #define SELECT            85	/* to VFS */
 #define FCHDIR            86	/* to VFS */
 #define FSYNC             87	/* to VFS */

include/minix/com.h

@@ -245,6 +245,14 @@
 #define TAPE_STAT0	m2_l1
 #define TAPE_STAT1	m2_l2
 
+/* Field names for the fstatvfs call */
+#define FSTATVFS_FD m1_i1
+#define FSTATVFS_BUF m1_p1
+
+/* Field names for the statvfs call */
+#define STATVFS_LEN m1_i1
+#define STATVFS_NAME m1_p1
+#define STATVFS_BUF m1_p2
 /*===========================================================================*
  *                  	   Messages for networking layer		     *
  *===========================================================================*/

include/minix/vfsif.h

@@ -113,8 +113,9 @@ typedef struct {
 #define REQ_NEWNODE	(VFS_BASE + 29)
 #define REQ_RDLINK	(VFS_BASE + 30)
 #define REQ_GETDENTS	(VFS_BASE + 31)
+#define REQ_STATVFS		(VFS_BASE + 32)
 
-#define NREQS                   32 
+#define NREQS                   33
 
 #endif
 

servers/vfs/proto.h

@@ -165,6 +165,7 @@ _PROTOTYPE( int req_create, (int fs_e, ino_t inode_nr, int omode,
 		uid_t uid, gid_t gid, char *path, node_details_t *res)	); 
 _PROTOTYPE( int req_flush, (endpoint_t fs_e, dev_t dev)			);
 _PROTOTYPE( int req_fstatfs, (int fs_e, int who_e, char *buf)		);
+_PROTOTYPE( int req_statvfs, (int fs_e, int who_e, char *buf)		);
 _PROTOTYPE( int req_ftrunc, (endpoint_t fs_e, ino_t inode_nr,
 						off_t start, off_t end)	);
 _PROTOTYPE( int req_getdents, (endpoint_t fs_e, ino_t inode_nr, u64_t pos,
@@ -220,6 +221,8 @@ _PROTOTYPE( int do_chroot, (void)					);
 _PROTOTYPE( int do_fstat, (void)					);
 _PROTOTYPE( int do_stat, (void)						);
 _PROTOTYPE( int do_fstatfs, (void)					);
+_PROTOTYPE( int do_statvfs, (void)					);
+_PROTOTYPE( int do_fstatvfs, (void)					);
 _PROTOTYPE( int do_rdlink, (void)                                      );
 _PROTOTYPE( int do_lstat, (void)                                       );
 

servers/vfs/request.c

@@ -11,6 +11,7 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/statfs.h>
+#include <sys/statvfs.h>
 #include <minix/vfsif.h>
 #include <minix/com.h>
 #include <minix/const.h>
@@ -227,6 +228,32 @@ PUBLIC int req_fstatfs(int fs_e, int who_e, char *buf)
 }
 
 
+/*===========================================================================*
+ *				req_statvfs	    			     *
+ *===========================================================================*/
+PUBLIC int req_statvfs(int fs_e, int who_e, char *buf)
+{
+  int r;
+  cp_grant_id_t grant_id;
+  message m;
+
+  grant_id = cpf_grant_magic(fs_e, who_e, (vir_bytes) buf, sizeof(struct statvfs),
+			CPF_WRITE);
+  if(grant_id == -1) 
+	  panic("req_statvfs: cpf_grant_magic failed");
+
+  /* Fill in request message */
+  m.m_type = REQ_STATVFS;
+  m.REQ_GRANT = grant_id;
+
+  /* Send/rec request */
+  r = fs_sendrec(fs_e, &m);
+  cpf_revoke(grant_id);
+
+  return(r);
+}
+
+
 /*===========================================================================*
  *				req_ftrunc	     			     *
  *===========================================================================*/

servers/vfs/stadir.c

@@ -8,6 +8,8 @@
  *   do_stat:	perform the STAT system call
  *   do_fstat:	perform the FSTAT system call
  *   do_fstatfs: perform the FSTATFS system call
+ *   do_statvfs: perform the STATVFS system call
+ *   do_fstatvfs: perform the FSTATVFS system call
  */
 
 #include "fs.h"
@@ -169,6 +171,38 @@ PUBLIC int do_fstatfs()
   return req_fstatfs(rfilp->filp_vno->v_fs_e, who_e, m_in.buffer);
 }
 
+/*===========================================================================*
+ *				do_statvfs					     *
+ *===========================================================================*/
+PUBLIC int do_statvfs()
+{
+/* Perform the stat(name, buf) system call. */
+  int r;
+  struct vnode *vp;
+
+  if (fetch_name(m_in.STATVFS_NAME, m_in.STATVFS_LEN, M1) != OK) return(err_code);
+  if ((vp = eat_path(PATH_NOFLAGS)) == NULL) return(err_code);
+  r = req_statvfs(vp->v_fs_e, who_e, m_in.STATVFS_BUF);
+
+  put_vnode(vp);
+  return r;
+}
+
+
+/*===========================================================================*
+ *				do_fstatvfs				     *
+ *===========================================================================*/
+PUBLIC int do_fstatvfs()
+{
+/* Perform the fstat(fd, buf) system call. */
+  register struct filp *rfilp;
+
+  /* Is the file descriptor valid? */
+  if ((rfilp = get_filp(m_in.FSTATVFS_FD)) == NULL) return(err_code);
+  
+  return req_statvfs(rfilp->filp_vno->v_fs_e, who_e, m_in.FSTATVFS_BUF);
+}
+
 
 /*===========================================================================*
  *                             do_lstat					     *

servers/vfs/table.c

@@ -98,8 +98,8 @@ PUBLIC _PROTOTYPE (int (*call_vec[]), (void) ) = {
 	do_getdents,	/* 80 = getdents */
 	do_llseek,	/* 81 = llseek */
 	do_fstatfs,	/* 82 = fstatfs */
-	no_sys,		/* 83 = unused */
+	do_statvfs,		/* 83 = fstatvfs */
-	no_sys,		/* 84 = unused */
+	do_fstatvfs,		/* 84 = statvfs */
 	do_select,	/* 85 = select */
 	do_fchdir,	/* 86 = fchdir */
 	do_fsync,	/* 87 = fsync */