mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
87 lines
2.0 KiB
Diff
87 lines
2.0 KiB
Diff
--- a/fs/ramfs/inode.c
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+++ b/fs/ramfs/inode.c
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@@ -33,6 +33,7 @@
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#include <linux/smp_lock.h>
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#include <linux/backing-dev.h>
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#include <linux/ramfs.h>
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+#include <linux/ctype.h>
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#include <asm/uaccess.h>
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#include "internal.h"
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@@ -160,10 +161,66 @@ static const struct super_operations ram
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.drop_inode = generic_delete_inode,
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};
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+static int ramfs_parse_options(char *options, int *mode)
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+{
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+ char *this_char, *value, *rest;
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+
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+ while (options != NULL) {
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+ this_char = options;
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+ for (;;) {
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+ /*
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+ * NUL-terminate this option: unfortunately,
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+ * mount options form a comma-separated list,
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+ * but mpol's nodelist may also contain commas.
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+ */
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+ options = strchr(options, ',');
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+ if (options == NULL)
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+ break;
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+ options++;
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+ if (!isdigit(*options)) {
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+ options[-1] = '\0';
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+ break;
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+ }
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+ }
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+ if (!*this_char)
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+ continue;
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+ if ((value = strchr(this_char,'=')) != NULL) {
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+ *value++ = 0;
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+ } else {
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+ printk(KERN_ERR
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+ "ramfs: No value for mount option '%s'\n",
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+ this_char);
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+ return 1;
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+ }
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+
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+ if (!strcmp(this_char,"mode")) {
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+ if (!mode)
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+ continue;
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+ *mode = simple_strtoul(value,&rest,8);
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+ if (*rest)
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+ goto bad_val;
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+ } else {
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+ printk(KERN_ERR "ramfs: Bad mount option %s\n",
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+ this_char);
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+ return 1;
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+ }
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+ }
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+ return 0;
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+
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+bad_val:
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+ printk(KERN_ERR "ramfs: Bad value '%s' for mount option '%s'\n",
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+ value, this_char);
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+ return 1;
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+}
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+
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static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
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{
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struct inode * inode;
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struct dentry * root;
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+ int mode = 0755;
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+
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+ if (ramfs_parse_options(data, &mode))
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+ return -EINVAL;
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sb->s_maxbytes = MAX_LFS_FILESIZE;
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sb->s_blocksize = PAGE_CACHE_SIZE;
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@@ -171,7 +228,7 @@ static int ramfs_fill_super(struct super
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sb->s_magic = RAMFS_MAGIC;
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sb->s_op = &ramfs_ops;
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sb->s_time_gran = 1;
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- inode = ramfs_get_inode(sb, S_IFDIR | 0755, 0);
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+ inode = ramfs_get_inode(sb, S_IFDIR | mode, 0);
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if (!inode)
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return -ENOMEM;
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