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authorJeremy Kerr <jk@ozlabs.org>2008-07-03 11:42:20 +1000
committerJeremy Kerr <jk@ozlabs.org>2008-07-09 10:13:41 +1000
commit2c3e47871d18f93b8bc2892fb41432111201356d (patch)
tree2336e5a9eaf69bfd92f5eee198a13a1382107a67
parent6f7dde812defe5bc49cf463ac1579ffeda5cbfd4 (diff)
downloadlinux-2c3e47871d18f93b8bc2892fb41432111201356d.tar.bz2
powerpc/spufs: only add ".ctx" file with "debug" mount option
Currently, the .ctx debug file in spu context directories is always present. We'd prefer to prevent users from relying on this file, so add a "debug" mount option to spufs. The .ctx file will only be added to the context directories when this option is present. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
-rw-r--r--arch/powerpc/platforms/cell/spufs/file.c5
-rw-r--r--arch/powerpc/platforms/cell/spufs/inode.c40
-rw-r--r--arch/powerpc/platforms/cell/spufs/spufs.h1
3 files changed, 38 insertions, 8 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index fee645b580cc..99c73066b82f 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -2645,7 +2645,6 @@ struct spufs_tree_descr spufs_dir_contents[] = {
{ "tid", &spufs_tid_fops, 0444, },
{ "stat", &spufs_stat_fops, 0444, },
{ "switch_log", &spufs_switch_log_fops, 0444 },
- { ".ctx", &spufs_ctx_fops, 0444, },
{},
};
@@ -2671,6 +2670,10 @@ struct spufs_tree_descr spufs_dir_nosched_contents[] = {
{ "object-id", &spufs_object_id_ops, 0666, },
{ "tid", &spufs_tid_fops, 0444, },
{ "stat", &spufs_stat_fops, 0444, },
+ {},
+};
+
+struct spufs_tree_descr spufs_dir_debug_contents[] = {
{ ".ctx", &spufs_ctx_fops, 0444, },
{},
};
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index c662ca783601..7123472801d9 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -42,10 +42,19 @@
#include "spufs.h"
+struct spufs_sb_info {
+ int debug;
+};
+
static struct kmem_cache *spufs_inode_cache;
char *isolated_loader;
static int isolated_loader_size;
+static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
static struct inode *
spufs_alloc_inode(struct super_block *sb)
{
@@ -280,6 +289,13 @@ spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags,
if (ret)
goto out_free_ctx;
+ if (spufs_get_sb_info(dir->i_sb)->debug)
+ ret = spufs_fill_dir(dentry, spufs_dir_debug_contents,
+ mode, ctx);
+
+ if (ret)
+ goto out_free_ctx;
+
d_instantiate(dentry, inode);
dget(dentry);
dir->i_nlink++;
@@ -640,18 +656,19 @@ out:
/* File system initialization */
enum {
- Opt_uid, Opt_gid, Opt_mode, Opt_err,
+ Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err,
};
static match_table_t spufs_tokens = {
- { Opt_uid, "uid=%d" },
- { Opt_gid, "gid=%d" },
- { Opt_mode, "mode=%o" },
- { Opt_err, NULL },
+ { Opt_uid, "uid=%d" },
+ { Opt_gid, "gid=%d" },
+ { Opt_mode, "mode=%o" },
+ { Opt_debug, "debug" },
+ { Opt_err, NULL },
};
static int
-spufs_parse_options(char *options, struct inode *root)
+spufs_parse_options(struct super_block *sb, char *options, struct inode *root)
{
char *p;
substring_t args[MAX_OPT_ARGS];
@@ -679,6 +696,9 @@ spufs_parse_options(char *options, struct inode *root)
return 0;
root->i_mode = option | S_IFDIR;
break;
+ case Opt_debug:
+ spufs_get_sb_info(sb)->debug = 1;
+ break;
default:
return 0;
}
@@ -737,7 +757,7 @@ spufs_create_root(struct super_block *sb, void *data)
SPUFS_I(inode)->i_ctx = NULL;
ret = -EINVAL;
- if (!spufs_parse_options(data, inode))
+ if (!spufs_parse_options(sb, data, inode))
goto out_iput;
ret = -ENOMEM;
@@ -755,6 +775,7 @@ out:
static int
spufs_fill_super(struct super_block *sb, void *data, int silent)
{
+ struct spufs_sb_info *info;
static struct super_operations s_ops = {
.alloc_inode = spufs_alloc_inode,
.destroy_inode = spufs_destroy_inode,
@@ -766,11 +787,16 @@ spufs_fill_super(struct super_block *sb, void *data, int silent)
save_mount_options(sb, data);
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = SPUFS_MAGIC;
sb->s_op = &s_ops;
+ sb->s_fs_info = info;
return spufs_create_root(sb, data);
}
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index 413605406bda..8ae8ef9dfc22 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -244,6 +244,7 @@ struct spufs_tree_descr {
extern struct spufs_tree_descr spufs_dir_contents[];
extern struct spufs_tree_descr spufs_dir_nosched_contents[];
+extern struct spufs_tree_descr spufs_dir_debug_contents[];
/* system call implementation */
extern struct spufs_calls spufs_calls;