target/linux/pxa/patches-2.6.21/034-ramfs-mode-support.patch

   1 --- a/fs/ramfs/inode.c
   2 +++ b/fs/ramfs/inode.c
   3 @@ -33,6 +33,7 @@
   4  #include <linux/smp_lock.h>
   5  #include <linux/backing-dev.h>
   6  #include <linux/ramfs.h>
   7 +#include <linux/ctype.h>
   8
   9  #include <asm/uaccess.h>
  10  #include "internal.h"
  11 @@ -160,10 +161,66 @@ static const struct super_operations ram
  12         .drop_inode     = generic_delete_inode,
  13  };
  14
  15 +static int ramfs_parse_options(char *options, int *mode)
  16 +{
  17 +       char *this_char, *value, *rest;
  18 +
  19 +       while (options != NULL) {
  20 +               this_char = options;
  21 +               for (;;) {
  22 +                       /*
  23 +                        * NUL-terminate this option: unfortunately,
  24 +                        * mount options form a comma-separated list,
  25 +                        * but mpol's nodelist may also contain commas.
  26 +                        */
  27 +                       options = strchr(options, ',');
  28 +                       if (options == NULL)
  29 +                               break;
  30 +                       options++;
  31 +                       if (!isdigit(*options)) {
  32 +                               options[-1] = '\0';
  33 +                               break;
  34 +                       }
  35 +               }
  36 +               if (!*this_char)
  37 +                       continue;
  38 +               if ((value = strchr(this_char,'=')) != NULL) {
  39 +                       *value++ = 0;
  40 +               } else {
  41 +                       printk(KERN_ERR
  42 +                           "ramfs: No value for mount option '%s'\n",
  43 +                           this_char);
  44 +                       return 1;
  45 +               }
  46 +
  47 +               if (!strcmp(this_char,"mode")) {
  48 +                       if (!mode)
  49 +                               continue;
  50 +                       *mode = simple_strtoul(value,&rest,8);
  51 +                       if (*rest)
  52 +                               goto bad_val;
  53 +               } else {
  54 +                       printk(KERN_ERR "ramfs: Bad mount option %s\n",
  55 +                              this_char);
  56 +                       return 1;
  57 +               }
  58 +       }
  59 +       return 0;
  60 +
  61 +bad_val:
  62 +       printk(KERN_ERR "ramfs: Bad value '%s' for mount option '%s'\n",
  63 +              value, this_char);
  64 +       return 1;
  65 +}
  66 +
  67  static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
  68  {
  69         struct inode * inode;
  70         struct dentry * root;
  71 +       int mode = 0755;
  72 +
  73 +       if (ramfs_parse_options(data, &mode))
  74 +               return -EINVAL;
  75
  76         sb->s_maxbytes = MAX_LFS_FILESIZE;
  77         sb->s_blocksize = PAGE_CACHE_SIZE;
  78 @@ -171,7 +228,7 @@ static int ramfs_fill_super(struct super
  79         sb->s_magic = RAMFS_MAGIC;
  80         sb->s_op = &ramfs_ops;
  81         sb->s_time_gran = 1;
  82 -       inode = ramfs_get_inode(sb, S_IFDIR | 0755, 0);
  83 +       inode = ramfs_get_inode(sb, S_IFDIR | mode, 0);
  84         if (!inode)
  85                 return -ENOMEM;
  86