cregit-Linux how code gets into the kernel

Release 4.17 fs/efs/symlink.c

Directory: fs/efs
// SPDX-License-Identifier: GPL-2.0
/*
 * symlink.c
 *
 * Copyright (c) 1999 Al Smith
 *
 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
 */

#include <linux/string.h>
#include <linux/pagemap.h>
#include <linux/buffer_head.h>
#include "efs.h"


static int efs_symlink_readpage(struct file *file, struct page *page) { char *link = page_address(page); struct buffer_head * bh; struct inode * inode = page->mapping->host; efs_block_t size = inode->i_size; int err; err = -ENAMETOOLONG; if (size > 2 * EFS_BLOCKSIZE) goto fail; /* read first 512 bytes of link target */ err = -EIO; bh = sb_bread(inode->i_sb, efs_bmap(inode, 0)); if (!bh) goto fail; memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size); brelse(bh); if (size > EFS_BLOCKSIZE) { bh = sb_bread(inode->i_sb, efs_bmap(inode, 1)); if (!bh) goto fail; memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE); brelse(bh); } link[size] = '\0'; SetPageUptodate(page); unlock_page(page); return 0; fail: SetPageError(page); unlock_page(page); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)20096.15%450.00%
Linus Torvalds41.92%112.50%
Andrew Morton20.96%112.50%
Al Viro20.96%225.00%
Total208100.00%8100.00%

const struct address_space_operations efs_symlink_aops = { .readpage = efs_symlink_readpage };

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21993.59%746.67%
Linus Torvalds41.71%16.67%
Christoph Hellwig41.71%213.33%
Art Haas20.85%16.67%
Al Viro20.85%213.33%
Andrew Morton20.85%16.67%
Greg Kroah-Hartman10.43%16.67%
Total234100.00%15100.00%
Directory: fs/efs
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