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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/ext2/ioctl.c | |
download | kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/ext2/ioctl.c')
-rw-r--r-- | fs/ext2/ioctl.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c new file mode 100644 index 0000000..709d867 --- /dev/null +++ b/fs/ext2/ioctl.c @@ -0,0 +1,81 @@ +/* + * linux/fs/ext2/ioctl.c + * + * Copyright (C) 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + */ + +#include "ext2.h" +#include <linux/time.h> +#include <linux/sched.h> +#include <asm/current.h> +#include <asm/uaccess.h> + + +int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd, + unsigned long arg) +{ + struct ext2_inode_info *ei = EXT2_I(inode); + unsigned int flags; + + ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg); + + switch (cmd) { + case EXT2_IOC_GETFLAGS: + flags = ei->i_flags & EXT2_FL_USER_VISIBLE; + return put_user(flags, (int __user *) arg); + case EXT2_IOC_SETFLAGS: { + unsigned int oldflags; + + if (IS_RDONLY(inode)) + return -EROFS; + + if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) + return -EACCES; + + if (get_user(flags, (int __user *) arg)) + return -EFAULT; + + if (!S_ISDIR(inode->i_mode)) + flags &= ~EXT2_DIRSYNC_FL; + + oldflags = ei->i_flags; + + /* + * The IMMUTABLE and APPEND_ONLY flags can only be changed by + * the relevant capability. + * + * This test looks nicer. Thanks to Pauline Middelink + */ + if ((flags ^ oldflags) & (EXT2_APPEND_FL | EXT2_IMMUTABLE_FL)) { + if (!capable(CAP_LINUX_IMMUTABLE)) + return -EPERM; + } + + flags = flags & EXT2_FL_USER_MODIFIABLE; + flags |= oldflags & ~EXT2_FL_USER_MODIFIABLE; + ei->i_flags = flags; + + ext2_set_inode_flags(inode); + inode->i_ctime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); + return 0; + } + case EXT2_IOC_GETVERSION: + return put_user(inode->i_generation, (int __user *) arg); + case EXT2_IOC_SETVERSION: + if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) + return -EPERM; + if (IS_RDONLY(inode)) + return -EROFS; + if (get_user(inode->i_generation, (int __user *) arg)) + return -EFAULT; + inode->i_ctime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); + return 0; + default: + return -ENOTTY; + } +} |