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[[meta copyright="Copyright © 2007 Free Software Foundation, Inc."]]
[[meta license="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled
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1. to run tmpfs as a regular user, /servers/default-pager must be executable by that user. by default it seems to be set to read/write.
$ sudo chmod ugo+x /servers/default-pager
Then I get this error:
tmpfs: /build/mbanck/hurd-20060825/build-tree/hurd/tmpfs/dir.c:62: diskfs_get_directs: Assertion `__builtin_offsetof (struct tmpfs_dirent, name) >= __builtin_offsetof (struct dirent, d_name)' failed.
2. i rearranged the struct tempfs_dirent in tmpfs.h to line up with the struct dirent. now the assert passes at line 62 of dir.c passes.
struct tmpfs_dirent
{
struct tmpfs_dirent *next;
struct disknode *dn;
+ char padding[3];
uint8_t namelen;
char name[0];
};
now ls works on an empty directory.
you can touch files, and run `ls' on them.
mkdir, rmdir works too.
fsysopts works
df works
3. creating a symlink fails.
old patch to get symlinks working:
http://www.mail-archive.com/bug-hurd@gnu.org/msg11844.html
--- node.c.orig 2005-07-24 09:56:39.000000000 -0400
+++ node.c 2005-07-24 09:55:46.000000000 -0400
@@ -330,6 +330,7 @@
create_symlink_hook (struct node *np, const char *target)
{
assert (np->dn->u.lnk == 0);
+ np->dn_stat.st_size = strlen (target);
if (np->dn_stat.st_size > 0)
{
const size_t size = np->dn_stat.st_size + 1;
@@ -337,6 +338,7 @@
if (np->dn->u.lnk == 0)
return ENOSPC;
memcpy (np->dn->u.lnk, target, size);
+ np->dn->type = DT_LNK;
adjust_used (size);
recompute_blocks (np);
}
@@ -380,8 +382,6 @@
error_t
diskfs_truncate (struct node *np, off_t size)
{
- if (np->allocsize <= size)
- return 0;
if (np->dn->type == DT_LNK)
{
@@ -392,6 +392,9 @@
return 0;
}
+ if (np->allocsize <= size)
+ return 0;
+
assert (np->dn->type == DT_REG);
if (default_pager == MACH_PORT_NULL)
now symlinks work.
4. can't write data to a file
--
miscellaneous notes:
diskfs_disk_name could be NULL, but it is "swap"
using default_pager_object_set_size (np->dn->u.reg.memobj, size); to truncate and grow.
why are our blocks 512? shouldn't it something else? or at least settable?
or does libdiskfs demand this?
diskfs_get_filemap_pager_struct (struct node *np) returns null.
shouldn't it return default_pager?
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