cregit-Linux how code gets into the kernel

Release 4.11 fs/freevxfs/vxfs_olt.c

Directory: fs/freevxfs
/*
 * Copyright (c) 2000-2001 Christoph Hellwig.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL").
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/* 
 * Veritas filesystem driver - object location table support.
 */
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/kernel.h>

#include "vxfs.h"
#include "vxfs_olt.h"
#include "vxfs_extern.h"



static inline void vxfs_get_fshead(struct vxfs_oltfshead *fshp, struct vxfs_sb_info *infp) { BUG_ON(infp->vsi_fshino); infp->vsi_fshino = fs32_to_cpu(infp, fshp->olt_fsino[0]); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds3177.50%125.00%
Krzysztof Błaszkowski512.50%125.00%
Eric Sesterhenn / Snakebyte37.50%125.00%
Pekka J Enberg12.50%125.00%
Total40100.00%4100.00%


static inline void vxfs_get_ilist(struct vxfs_oltilist *ilistp, struct vxfs_sb_info *infp) { BUG_ON(infp->vsi_iext); infp->vsi_iext = fs32_to_cpu(infp, ilistp->olt_iext[0]); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds3177.50%125.00%
Krzysztof Błaszkowski512.50%125.00%
Eric Sesterhenn / Snakebyte37.50%125.00%
Pekka J Enberg12.50%125.00%
Total40100.00%4100.00%


static inline u_long vxfs_oblock(struct super_block *sbp, daddr_t block, u_long bsize) { BUG_ON(sbp->s_blocksize % bsize); return (block * (sbp->s_blocksize / bsize)); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds3690.00%250.00%
Eric Sesterhenn / Snakebyte37.50%125.00%
Pekka J Enberg12.50%125.00%
Total40100.00%4100.00%

/** * vxfs_read_olt - read olt * @sbp: superblock of the filesystem * @bsize: blocksize of the filesystem * * Description: * vxfs_read_olt reads the olt of the filesystem described by @sbp * into main memory and does some basic setup. * * Returns: * Zero on success, else a negative error code. */
int vxfs_read_olt(struct super_block *sbp, u_long bsize) { struct vxfs_sb_info *infp = VXFS_SBI(sbp); struct buffer_head *bp; struct vxfs_olt *op; char *oaddr, *eaddr; bp = sb_bread(sbp, vxfs_oblock(sbp, infp->vsi_oltext, bsize)); if (!bp || !bp->b_data) goto fail; op = (struct vxfs_olt *)bp->b_data; if (fs32_to_cpu(infp, op->olt_magic) != VXFS_OLT_MAGIC) { printk(KERN_NOTICE "vxfs: ivalid olt magic number\n"); goto fail; } /* * It is in theory possible that vsi_oltsize is > 1. * I've not seen any such filesystem yet and I'm lazy.. --hch */ if (infp->vsi_oltsize > 1) { printk(KERN_NOTICE "vxfs: oltsize > 1 detected.\n"); printk(KERN_NOTICE "vxfs: please notify hch@infradead.org\n"); goto fail; } oaddr = bp->b_data + fs32_to_cpu(infp, op->olt_size); eaddr = bp->b_data + (infp->vsi_oltsize * sbp->s_blocksize); while (oaddr < eaddr) { struct vxfs_oltcommon *ocp = (struct vxfs_oltcommon *)oaddr; switch (fs32_to_cpu(infp, ocp->olt_type)) { case VXFS_OLT_FSHEAD: vxfs_get_fshead((struct vxfs_oltfshead *)oaddr, infp); break; case VXFS_OLT_ILIST: vxfs_get_ilist((struct vxfs_oltilist *)oaddr, infp); break; } oaddr += fs32_to_cpu(infp, ocp->olt_size); } brelse(bp); return (infp->vsi_fshino && infp->vsi_iext) ? 0 : -EINVAL; fail: brelse(bp); return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds23787.45%360.00%
Krzysztof Błaszkowski3312.18%120.00%
Rusty Russell10.37%120.00%
Total271100.00%5100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds35084.95%333.33%
Krzysztof Błaszkowski4310.44%111.11%
Eric Sesterhenn / Snakebyte92.18%111.11%
Adrian Bunk30.73%111.11%
Pekka J Enberg30.73%111.11%
Christoph Hellwig30.73%111.11%
Rusty Russell10.24%111.11%
Total412100.00%9100.00%
Directory: fs/freevxfs
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