Re: chmod messes up permissions on hfs filesystem
From: Roman Zippel
Date: Wed Nov 03 2004 - 11:02:01 EST
Hi,
On Tue, 2 Nov 2004, Horms wrote:
> Thanks for the patch, though the behaviour of the umask still seems
> rather odd. I would like to offer an updated patch which I believe
> makes the umask behave in the expected way. It also ensures
> that the write_lock bit is read from/written to disk correctly.
You apply the umask before updating the write bit, which is incorrect.
> @@ -196,6 +197,11 @@ struct inode *hfs_new_inode(struct inode
> HFS_I(inode)->cached_blocks = 0;
> memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec));
> memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec));
> + inode->i_mode = (mode & ~0777) | (~hsb->s_file_umask & 0777);
> + if (mode & S_IWUSR)
> + inode->i_mode |= S_IWUGO;
> + else
> + inode->i_mode &= ~S_IWUGO;
> }
> insert_inode_hash(inode);
> mark_inode_dirty(inode);
Thanks, for reminding me to fix hfs_new_inode here, but the above applies.
> ===== fs/hfs/super.c 1.32 vs edited =====
> --- 1.32/fs/hfs/super.c 2004-10-26 05:06:47 +09:00
> +++ edited/fs/hfs/super.c 2004-11-01 20:01:54 +09:00
> @@ -149,8 +149,8 @@ static int parse_options(char *options,
> /* initialize the sb with defaults */
> hsb->s_uid = current->uid;
> hsb->s_gid = current->gid;
> - hsb->s_file_umask = 0644;
> - hsb->s_dir_umask = 0755;
> + hsb->s_file_umask = 0111;
> + hsb->s_dir_umask = 0000;
> hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
> hsb->s_quiet = 0;
> hsb->part = -1;
This may be closer to the mac default, where everyone can access anything,
but I'd rather keep a safe default.
Below is my updated patch.
bye, Roman
Index: fs/hfs/inode.c
===================================================================
RCS file: /home/other/cvs/linux/linux-2.6/fs/hfs/inode.c,v
retrieving revision 1.1.1.5
diff -u -p -r1.1.1.5 inode.c
--- fs/hfs/inode.c 17 Jun 2004 08:39:32 -0000 1.1.1.5
+++ fs/hfs/inode.c 3 Nov 2004 15:51:43 -0000
@@ -172,14 +172,16 @@ struct inode *hfs_new_inode(struct inode
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
HFS_I(inode)->flags = 0;
HFS_I(inode)->rsrc_inode = NULL;
- if (S_ISDIR(inode->i_mode)) {
+ if (S_ISDIR(mode)) {
inode->i_size = 2;
HFS_SB(sb)->folder_count++;
if (dir->i_ino == HFS_ROOT_CNID)
HFS_SB(sb)->root_dirs++;
inode->i_op = &hfs_dir_inode_operations;
inode->i_fop = &hfs_dir_operations;
- } else if (S_ISREG(inode->i_mode)) {
+ inode->i_mode |= S_IRWXUGO;
+ inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask;
+ } else if (S_ISREG(mode)) {
HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
HFS_SB(sb)->file_count++;
if (dir->i_ino == HFS_ROOT_CNID)
@@ -187,6 +189,10 @@ struct inode *hfs_new_inode(struct inode
inode->i_op = &hfs_file_inode_operations;
inode->i_fop = &hfs_file_operations;
inode->i_mapping->a_ops = &hfs_aops;
+ inode->i_mode |= S_IRUGO|S_IXUGO;
+ if (mode & S_IWUSR)
+ inode->i_mode |= S_IWUGO;
+ inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask;
HFS_I(inode)->phys_size = 0;
HFS_I(inode)->alloc_blocks = 0;
HFS_I(inode)->first_blocks = 0;
@@ -313,7 +319,7 @@ int hfs_read_inode(struct inode *inode,
inode->i_mode = S_IRUGO | S_IXUGO;
if (!(rec->file.Flags & HFS_FIL_LOCK))
inode->i_mode |= S_IWUGO;
- inode->i_mode &= hsb->s_file_umask;
+ inode->i_mode &= ~hsb->s_file_umask;
inode->i_mode |= S_IFREG;
inode->i_ctime = inode->i_atime = inode->i_mtime =
hfs_m_to_utime(rec->file.MdDat);
@@ -326,7 +332,7 @@ int hfs_read_inode(struct inode *inode,
inode->i_ino = be32_to_cpu(rec->dir.DirID);
inode->i_blocks = 0;
inode->i_size = be16_to_cpu(rec->dir.Val) + 2;
- inode->i_mode = S_IFDIR | (S_IRWXUGO & hsb->s_dir_umask);
+ inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask);
inode->i_ctime = inode->i_atime = inode->i_mtime =
hfs_m_to_utime(rec->file.MdDat);
inode->i_op = &hfs_dir_inode_operations;
Index: fs/hfs/super.c
===================================================================
RCS file: /home/other/cvs/linux/linux-2.6/fs/hfs/super.c,v
retrieving revision 1.1.1.5
diff -u -p -r1.1.1.5 super.c
--- fs/hfs/super.c 10 May 2004 15:02:37 -0000 1.1.1.5
+++ fs/hfs/super.c 1 Nov 2004 16:03:14 -0000
@@ -150,8 +150,8 @@ static int parse_options(char *options,
/* initialize the sb with defaults */
hsb->s_uid = current->uid;
hsb->s_gid = current->gid;
- hsb->s_file_umask = 0644;
- hsb->s_dir_umask = 0755;
+ hsb->s_file_umask = 0133;
+ hsb->s_dir_umask = 0022;
hsb->s_type = 0x3f3f3f3f; /* == '????' */
hsb->s_creator = 0x3f3f3f3f; /* == '????' */
hsb->s_quiet = 0;
-
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