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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/affs/symlink.c
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!
Diffstat (limited to 'fs/affs/symlink.c')
-rw-r--r--fs/affs/symlink.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/fs/affs/symlink.c b/fs/affs/symlink.c
new file mode 100644
index 00000000000..426f0f094f2
--- /dev/null
+++ b/fs/affs/symlink.c
@@ -0,0 +1,78 @@
+/*
+ * linux/fs/affs/symlink.c
+ *
+ * 1995 Hans-Joachim Widmaier - Modified for affs.
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * affs symlink handling code
+ */
+
+#include "affs.h"
+
+static int affs_symlink_readpage(struct file *file, struct page *page)
+{
+ struct buffer_head *bh;
+ struct inode *inode = page->mapping->host;
+ char *link = kmap(page);
+ struct slink_front *lf;
+ int err;
+ int i, j;
+ char c;
+ char lc;
+ char *pf;
+
+ pr_debug("AFFS: follow_link(ino=%lu)\n",inode->i_ino);
+
+ err = -EIO;
+ bh = affs_bread(inode->i_sb, inode->i_ino);
+ if (!bh)
+ goto fail;
+ i = 0;
+ j = 0;
+ lf = (struct slink_front *)bh->b_data;
+ lc = 0;
+ pf = AFFS_SB(inode->i_sb)->s_prefix ? AFFS_SB(inode->i_sb)->s_prefix : "/";
+
+ if (strchr(lf->symname,':')) { /* Handle assign or volume name */
+ while (i < 1023 && (c = pf[i]))
+ link[i++] = c;
+ while (i < 1023 && lf->symname[j] != ':')
+ link[i++] = lf->symname[j++];
+ if (i < 1023)
+ link[i++] = '/';
+ j++;
+ lc = '/';
+ }
+ while (i < 1023 && (c = lf->symname[j])) {
+ if (c == '/' && lc == '/' && i < 1020) { /* parent dir */
+ link[i++] = '.';
+ link[i++] = '.';
+ }
+ link[i++] = c;
+ lc = c;
+ j++;
+ }
+ link[i] = '\0';
+ affs_brelse(bh);
+ SetPageUptodate(page);
+ kunmap(page);
+ unlock_page(page);
+ return 0;
+fail:
+ SetPageError(page);
+ kunmap(page);
+ unlock_page(page);
+ return err;
+}
+
+struct address_space_operations affs_symlink_aops = {
+ .readpage = affs_symlink_readpage,
+};
+
+struct inode_operations affs_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = page_follow_link_light,
+ .put_link = page_put_link,
+ .setattr = affs_notify_change,
+};