forked from luck/tmp_suning_uos_patched
754661f143
Many struct inode_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
79 lines
1.6 KiB
C
79 lines
1.6 KiB
C
/*
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* linux/fs/affs/symlink.c
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*
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* 1995 Hans-Joachim Widmaier - Modified for affs.
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* affs symlink handling code
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*/
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#include "affs.h"
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static int affs_symlink_readpage(struct file *file, struct page *page)
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{
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struct buffer_head *bh;
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struct inode *inode = page->mapping->host;
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char *link = kmap(page);
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struct slink_front *lf;
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int err;
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int i, j;
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char c;
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char lc;
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char *pf;
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pr_debug("AFFS: follow_link(ino=%lu)\n",inode->i_ino);
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err = -EIO;
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bh = affs_bread(inode->i_sb, inode->i_ino);
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if (!bh)
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goto fail;
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i = 0;
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j = 0;
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lf = (struct slink_front *)bh->b_data;
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lc = 0;
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pf = AFFS_SB(inode->i_sb)->s_prefix ? AFFS_SB(inode->i_sb)->s_prefix : "/";
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if (strchr(lf->symname,':')) { /* Handle assign or volume name */
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while (i < 1023 && (c = pf[i]))
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link[i++] = c;
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while (i < 1023 && lf->symname[j] != ':')
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link[i++] = lf->symname[j++];
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if (i < 1023)
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link[i++] = '/';
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j++;
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lc = '/';
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}
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while (i < 1023 && (c = lf->symname[j])) {
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if (c == '/' && lc == '/' && i < 1020) { /* parent dir */
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link[i++] = '.';
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link[i++] = '.';
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}
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link[i++] = c;
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lc = c;
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j++;
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}
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link[i] = '\0';
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affs_brelse(bh);
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SetPageUptodate(page);
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kunmap(page);
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unlock_page(page);
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return 0;
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fail:
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SetPageError(page);
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kunmap(page);
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unlock_page(page);
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return err;
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}
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const struct address_space_operations affs_symlink_aops = {
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.readpage = affs_symlink_readpage,
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};
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const struct inode_operations affs_symlink_inode_operations = {
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.readlink = generic_readlink,
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.follow_link = page_follow_link_light,
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.put_link = page_put_link,
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.setattr = affs_notify_change,
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};
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