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authorJan Kara <jack@suse.cz>2009-06-17 16:26:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:03:45 -0700
commit52b680c81238ea14693ab893d5d32a4d1c0a987d (patch)
tree9c3ec57c06faf001b60529d088c189f4bcb77fac /fs/isofs
parentef43618a47179b41e7203a624f2c7445e7da488c (diff)
downloadlinaro-lsk-52b680c81238ea14693ab893d5d32a4d1c0a987d.tar.gz
isofs: let mode and dmode mount options override rock ridge mode setting
So far, permissions set via 'mode' and/or 'dmode' mount options were effective only if the medium had no rock ridge extensions (or was mounted without them). Add 'overriderockmode' mount option to indicate that these options should override permissions set in rock ridge extensions. Maybe this should be default but the current behavior is there since mount options were created so I think we should not change how they behave. Cc: <Hans-Joachim.Baader@cjt.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/isofs')
-rw-r--r--fs/isofs/inode.c50
-rw-r--r--fs/isofs/isofs.h3
2 files changed, 41 insertions, 12 deletions
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 068b34b5a10..8e6fd41eec1 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -148,6 +148,7 @@ struct iso9660_options{
char hide;
char showassoc;
char nocompress;
+ char overriderockperm;
unsigned char check;
unsigned int blocksize;
mode_t fmode;
@@ -312,7 +313,7 @@ enum {
Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore,
Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet,
Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err,
- Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode,
+ Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm,
};
static const match_table_t tokens = {
@@ -340,6 +341,7 @@ static const match_table_t tokens = {
{Opt_gid, "gid=%u"},
{Opt_mode, "mode=%u"},
{Opt_dmode, "dmode=%u"},
+ {Opt_overriderockperm, "overriderockperm"},
{Opt_block, "block=%u"},
{Opt_ignore, "conv=binary"},
{Opt_ignore, "conv=b"},
@@ -367,16 +369,12 @@ static int parse_options(char *options, struct iso9660_options *popt)
popt->check = 'u'; /* unset */
popt->nocompress = 0;
popt->blocksize = 1024;
- popt->fmode = popt->dmode = S_IRUGO | S_IXUGO; /*
- * r-x for all. The disc could
- * be shared with DOS machines so
- * virtually anything could be
- * a valid executable.
- */
+ popt->fmode = popt->dmode = ISOFS_INVALID_MODE;
popt->gid = 0;
popt->uid = 0;
popt->iocharset = NULL;
popt->utf8 = 0;
+ popt->overriderockperm = 0;
popt->session=-1;
popt->sbsector=-1;
if (!options)
@@ -466,6 +464,9 @@ static int parse_options(char *options, struct iso9660_options *popt)
return 0;
popt->dmode = option;
break;
+ case Opt_overriderockperm:
+ popt->overriderockperm = 1;
+ break;
case Opt_block:
if (match_int(&args[0], &option))
return 0;
@@ -811,13 +812,20 @@ root_found:
sbi->s_gid = opt.gid;
sbi->s_utf8 = opt.utf8;
sbi->s_nocompress = opt.nocompress;
+ sbi->s_overriderockperm = opt.overriderockperm;
/*
* It would be incredibly stupid to allow people to mark every file
* on the disk as suid, so we merely allow them to set the default
* permissions.
*/
- sbi->s_fmode = opt.fmode & 0777;
- sbi->s_dmode = opt.dmode & 0777;
+ if (opt.fmode != ISOFS_INVALID_MODE)
+ sbi->s_fmode = opt.fmode & 0777;
+ else
+ sbi->s_fmode = ISOFS_INVALID_MODE;
+ if (opt.dmode != ISOFS_INVALID_MODE)
+ sbi->s_dmode = opt.dmode & 0777;
+ else
+ sbi->s_dmode = ISOFS_INVALID_MODE;
/*
* Read the root inode, which _may_ result in changing
@@ -1261,7 +1269,10 @@ static int isofs_read_inode(struct inode *inode)
ei->i_file_format = isofs_file_normal;
if (de->flags[-high_sierra] & 2) {
- inode->i_mode = sbi->s_dmode | S_IFDIR;
+ if (sbi->s_dmode != ISOFS_INVALID_MODE)
+ inode->i_mode = S_IFDIR | sbi->s_dmode;
+ else
+ inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
inode->i_nlink = 1; /*
* Set to 1. We know there are 2, but
* the find utility tries to optimize
@@ -1270,8 +1281,16 @@ static int isofs_read_inode(struct inode *inode)
* do it the hard way.
*/
} else {
- /* Everybody gets to read the file. */
- inode->i_mode = sbi->s_fmode | S_IFREG;
+ if (sbi->s_fmode != ISOFS_INVALID_MODE) {
+ inode->i_mode = S_IFREG | sbi->s_fmode;
+ } else {
+ /*
+ * Set default permissions: r-x for all. The disc
+ * could be shared with DOS machines so virtually
+ * anything could be a valid executable.
+ */
+ inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO;
+ }
inode->i_nlink = 1;
}
inode->i_uid = sbi->s_uid;
@@ -1349,6 +1368,13 @@ static int isofs_read_inode(struct inode *inode)
test_and_set_uid(&inode->i_uid, sbi->s_uid);
test_and_set_gid(&inode->i_gid, sbi->s_gid);
}
+ /* Now set final access rights if overriding rock ridge setting */
+ if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm &&
+ sbi->s_dmode != ISOFS_INVALID_MODE)
+ inode->i_mode = S_IFDIR | sbi->s_dmode;
+ if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm &&
+ sbi->s_fmode != ISOFS_INVALID_MODE)
+ inode->i_mode = S_IFREG | sbi->s_fmode;
/* Install the inode operations vector */
if (S_ISREG(inode->i_mode)) {
diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index ccbf72faf27..9679fbcbfc0 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -50,6 +50,7 @@ struct isofs_sb_info {
unsigned char s_nocompress;
unsigned char s_hide;
unsigned char s_showassoc;
+ unsigned char s_overriderockperm;
mode_t s_fmode;
mode_t s_dmode;
@@ -58,6 +59,8 @@ struct isofs_sb_info {
struct nls_table *s_nls_iocharset; /* Native language support table */
};
+#define ISOFS_INVALID_MODE ((mode_t) -1)
+
static inline struct isofs_sb_info *ISOFS_SB(struct super_block *sb)
{
return sb->s_fs_info;