Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 208 insertions, 0 deletions

diff --git a/fs/attr.c b/fs/attr.c
new file mode 100644
index 000000000000..c3c76fe78346
--- /dev/null
+++ b/fs/attr.c
@@ -0,0 +1,208 @@
+/*
+ *  linux/fs/attr.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  changes by Thomas Schoebel-Theuer
+ */
+
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/smp_lock.h>
+#include <linux/dnotify.h>
+#include <linux/fcntl.h>
+#include <linux/quotaops.h>
+#include <linux/security.h>
+#include <linux/time.h>
+
+/* Taken over from the old code... */
+
+/* POSIX UID/GID verification for setting inode attributes. */
+int inode_change_ok(struct inode *inode, struct iattr *attr)
+{
+        int retval = -EPERM;
+        unsigned int ia_valid = attr->ia_valid;
+
+        /* If force is set do it anyway. */
+        if (ia_valid & ATTR_FORCE)
+                goto fine;
+
+        /* Make sure a caller can chown. */
+        if ((ia_valid & ATTR_UID) &&
+            (current->fsuid != inode->i_uid ||
+             attr->ia_uid != inode->i_uid) && !capable(CAP_CHOWN))
+                goto error;
+
+        /* Make sure caller can chgrp. */
+        if ((ia_valid & ATTR_GID) &&
+            (current->fsuid != inode->i_uid ||
+            (!in_group_p(attr->ia_gid) && attr->ia_gid != inode->i_gid)) &&
+            !capable(CAP_CHOWN))
+                goto error;
+
+        /* Make sure a caller can chmod. */
+        if (ia_valid & ATTR_MODE) {
+                if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+                        goto error;
+                /* Also check the setgid bit! */
+                if (!in_group_p((ia_valid & ATTR_GID) ? attr->ia_gid :
+                                inode->i_gid) && !capable(CAP_FSETID))
+                        attr->ia_mode &= ~S_ISGID;
+        }
+
+        /* Check for setting the inode time. */
+        if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
+                if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
+                        goto error;
+        }
+fine:
+        retval = 0;
+error:
+        return retval;
+}
+
+EXPORT_SYMBOL(inode_change_ok);
+
+int inode_setattr(struct inode * inode, struct iattr * attr)
+{
+        unsigned int ia_valid = attr->ia_valid;
+        int error = 0;
+
+        if (ia_valid & ATTR_SIZE) {
+                if (attr->ia_size != i_size_read(inode)) {
+                        error = vmtruncate(inode, attr->ia_size);
+                        if (error || (ia_valid == ATTR_SIZE))
+                                goto out;
+                } else {
+                        /*
+                         * We skipped the truncate but must still update
+                         * timestamps
+                         */
+                        ia_valid |= ATTR_MTIME|ATTR_CTIME;
+                }
+        }
+
+        if (ia_valid & ATTR_UID)
+                inode->i_uid = attr->ia_uid;
+        if (ia_valid & ATTR_GID)
+                inode->i_gid = attr->ia_gid;
+        if (ia_valid & ATTR_ATIME)
+                inode->i_atime = timespec_trunc(attr->ia_atime,
+                                                inode->i_sb->s_time_gran);
+        if (ia_valid & ATTR_MTIME)
+                inode->i_mtime = timespec_trunc(attr->ia_mtime,
+                                                inode->i_sb->s_time_gran);
+        if (ia_valid & ATTR_CTIME)
+                inode->i_ctime = timespec_trunc(attr->ia_ctime,
+                                                inode->i_sb->s_time_gran);
+        if (ia_valid & ATTR_MODE) {
+                umode_t mode = attr->ia_mode;
+
+                if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
+                        mode &= ~S_ISGID;
+                inode->i_mode = mode;
+        }
+        mark_inode_dirty(inode);
+out:
+        return error;
+}
+
+EXPORT_SYMBOL(inode_setattr);
+
+int setattr_mask(unsigned int ia_valid)
+{
+        unsigned long dn_mask = 0;
+
+        if (ia_valid & ATTR_UID)
+                dn_mask |= DN_ATTRIB;
+        if (ia_valid & ATTR_GID)
+                dn_mask |= DN_ATTRIB;
+        if (ia_valid & ATTR_SIZE)
+                dn_mask |= DN_MODIFY;
+        /* both times implies a utime(s) call */
+        if ((ia_valid & (ATTR_ATIME|ATTR_MTIME)) == (ATTR_ATIME|ATTR_MTIME))
+                dn_mask |= DN_ATTRIB;
+        else if (ia_valid & ATTR_ATIME)
+                dn_mask |= DN_ACCESS;
+        else if (ia_valid & ATTR_MTIME)
+                dn_mask |= DN_MODIFY;
+        if (ia_valid & ATTR_MODE)
+                dn_mask |= DN_ATTRIB;
+        return dn_mask;
+}
+
+int notify_change(struct dentry * dentry, struct iattr * attr)
+{
+        struct inode *inode = dentry->d_inode;
+        mode_t mode;
+        int error;
+        struct timespec now;
+        unsigned int ia_valid = attr->ia_valid;
+
+        if (!inode)
+                BUG();
+
+        mode = inode->i_mode;
+        now = current_fs_time(inode->i_sb);
+
+        attr->ia_ctime = now;
+        if (!(ia_valid & ATTR_ATIME_SET))
+                attr->ia_atime = now;
+        if (!(ia_valid & ATTR_MTIME_SET))
+                attr->ia_mtime = now;
+        if (ia_valid & ATTR_KILL_SUID) {
+                attr->ia_valid &= ~ATTR_KILL_SUID;
+                if (mode & S_ISUID) {
+                        if (!(ia_valid & ATTR_MODE)) {
+                                ia_valid = attr->ia_valid |= ATTR_MODE;
+                                attr->ia_mode = inode->i_mode;
+                        }
+                        attr->ia_mode &= ~S_ISUID;
+                }
+        }
+        if (ia_valid & ATTR_KILL_SGID) {
+                attr->ia_valid &= ~ ATTR_KILL_SGID;
+                if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
+                        if (!(ia_valid & ATTR_MODE)) {
+                                ia_valid = attr->ia_valid |= ATTR_MODE;
+                                attr->ia_mode = inode->i_mode;
+                        }
+                        attr->ia_mode &= ~S_ISGID;
+                }
+        }
+        if (!attr->ia_valid)
+                return 0;
+
+        if (ia_valid & ATTR_SIZE)
+                down_write(&dentry->d_inode->i_alloc_sem);
+
+        if (inode->i_op && inode->i_op->setattr) {
+                error = security_inode_setattr(dentry, attr);
+                if (!error)
+                        error = inode->i_op->setattr(dentry, attr);
+        } else {
+                error = inode_change_ok(inode, attr);
+                if (!error)
+                        error = security_inode_setattr(dentry, attr);
+                if (!error) {
+                        if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+                            (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid))
+                                error = DQUOT_TRANSFER(inode, attr) ? -EDQUOT : 0;
+                        if (!error)
+                                error = inode_setattr(inode, attr);
+                }
+        }
+
+        if (ia_valid & ATTR_SIZE)
+                up_write(&dentry->d_inode->i_alloc_sem);
+
+        if (!error) {
+                unsigned long dn_mask = setattr_mask(ia_valid);
+                if (dn_mask)
+                        dnotify_parent(dentry, dn_mask);
+        }
+        return error;
+}
+
+EXPORT_SYMBOL(notify_change);