diff options
Diffstat (limited to 'hurd/translator/tmpfs')
| -rw-r--r-- | hurd/translator/tmpfs/notes_bing.mdwn | 144 |
1 files changed, 75 insertions, 69 deletions
diff --git a/hurd/translator/tmpfs/notes_bing.mdwn b/hurd/translator/tmpfs/notes_bing.mdwn index 8aa48b44..312c3342 100644 --- a/hurd/translator/tmpfs/notes_bing.mdwn +++ b/hurd/translator/tmpfs/notes_bing.mdwn @@ -6,85 +6,91 @@ Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU_Free_Documentation_License|/fdl]]."]] -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 +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. + 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" +`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. +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? +or does [[libdiskfs]] demand this? -diskfs_get_filemap_pager_struct (struct node *np) returns null. -shouldn't it return default_pager? ---- +`diskfs_get_filemap_pager_struct (struct node *np)` returns null. +shouldn't it return `default_pager`? |