diff options
| -rw-r--r-- | fs/filesystems.c | 27 | ||||
| -rw-r--r-- | include/linux/fs.h | 2 | ||||
| -rw-r--r-- | init/do_mounts.c | 49 |
3 files changed, 39 insertions, 39 deletions
diff --git a/fs/filesystems.c b/fs/filesystems.c index 90b8d879fbaf..58b9067b2391 100644 --- a/fs/filesystems.c +++ b/fs/filesystems.c @@ -209,21 +209,28 @@ SYSCALL_DEFINE3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2) } #endif -int __init get_filesystem_list(char *buf) +int __init list_bdev_fs_names(char *buf, size_t size) { - int len = 0; - struct file_system_type * tmp; + struct file_system_type *p; + size_t len; + int count = 0; read_lock(&file_systems_lock); - tmp = file_systems; - while (tmp && len < PAGE_SIZE - 80) { - len += sprintf(buf+len, "%s\t%s\n", - (tmp->fs_flags & FS_REQUIRES_DEV) ? "" : "nodev", - tmp->name); - tmp = tmp->next; + for (p = file_systems; p; p = p->next) { + if (!(p->fs_flags & FS_REQUIRES_DEV)) + continue; + len = strlen(p->name) + 1; + if (len > size) { + pr_warn("%s: truncating file system list\n", __func__); + break; + } + memcpy(buf, p->name, len); + buf += len; + size -= len; + count++; } read_unlock(&file_systems_lock); - return len; + return count; } #ifdef CONFIG_PROC_FS diff --git a/include/linux/fs.h b/include/linux/fs.h index 640574294216..c76dfc01cf9d 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3622,7 +3622,7 @@ int proc_nr_dentry(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos); int proc_nr_inodes(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos); -int __init get_filesystem_list(char *buf); +int __init list_bdev_fs_names(char *buf, size_t size); #define __FMODE_EXEC ((__force int) FMODE_EXEC) #define __FMODE_NONOTIFY ((__force int) FMODE_NONOTIFY) diff --git a/init/do_mounts.c b/init/do_mounts.c index bdeb90b8d669..9b4a1f877e47 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -338,32 +338,22 @@ __setup("rootflags=", root_data_setup); __setup("rootfstype=", fs_names_setup); __setup("rootdelay=", root_delay_setup); -static void __init split_fs_names(char *page, char *names) +static int __init split_fs_names(char *page, char *names) { - strcpy(page, root_fs_names); - while (*page++) { - if (page[-1] == ',') - page[-1] = '\0'; - } - *page = '\0'; -} - -static void __init get_all_fs_names(char *page) -{ - int len = get_filesystem_list(page); - char *s = page, *p, *next; + int count = 0; + char *p = page; - page[len] = '\0'; - for (p = page - 1; p; p = next) { - next = strchr(++p, '\n'); - if (*p++ != '\t') - continue; - while ((*s++ = *p++) != '\n') - ; - s[-1] = '\0'; + strcpy(p, root_fs_names); + while (*p++) { + if (p[-1] == ',') + p[-1] = '\0'; } + *p = '\0'; + + for (p = page; *p; p += strlen(p)+1) + count++; - *s = '\0'; + return count; } static int __init do_mount_root(const char *name, const char *fs, @@ -409,15 +399,16 @@ void __init mount_block_root(char *name, int flags) char *fs_names = page_address(page); char *p; char b[BDEVNAME_SIZE]; + int num_fs, i; scnprintf(b, BDEVNAME_SIZE, "unknown-block(%u,%u)", MAJOR(ROOT_DEV), MINOR(ROOT_DEV)); if (root_fs_names) - split_fs_names(fs_names, root_fs_names); + num_fs = split_fs_names(fs_names, root_fs_names); else - get_all_fs_names(fs_names); + num_fs = list_bdev_fs_names(fs_names, PAGE_SIZE); retry: - for (p = fs_names; *p; p += strlen(p)+1) { + for (i = 0, p = fs_names; i < num_fs; i++, p += strlen(p)+1) { int err = do_mount_root(name, p, flags, root_mount_data); switch (err) { case 0: @@ -450,7 +441,7 @@ retry: printk("List of all partitions:\n"); printk_all_partitions(); printk("No filesystem could mount root, tried: "); - for (p = fs_names; *p; p += strlen(p)+1) + for (i = 0, p = fs_names; i < num_fs; i++, p += strlen(p)+1) printk(" %s", p); printk("\n"); panic("VFS: Unable to mount root fs on %s", b); @@ -551,13 +542,15 @@ static int __init mount_nodev_root(void) { char *fs_names, *fstype; int err = -EINVAL; + int num_fs, i; fs_names = (void *)__get_free_page(GFP_KERNEL); if (!fs_names) return -EINVAL; - split_fs_names(fs_names, root_fs_names); + num_fs = split_fs_names(fs_names, root_fs_names); - for (fstype = fs_names; *fstype; fstype += strlen(fstype) + 1) { + for (i = 0, fstype = fs_names; i < num_fs; + i++, fstype += strlen(fstype) + 1) { if (!fs_is_nodev(fstype)) continue; err = do_mount_root(root_device_name, fstype, root_mountflags, |