diff options
Diffstat (limited to 'fs/xfs/xfs_symlink_remote.c')
| -rw-r--r-- | fs/xfs/xfs_symlink_remote.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/fs/xfs/xfs_symlink_remote.c b/fs/xfs/xfs_symlink_remote.c deleted file mode 100644 index 23c2f2577c8d..000000000000 --- a/fs/xfs/xfs_symlink_remote.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * Copyright (c) 2000-2006 Silicon Graphics, Inc. - * Copyright (c) 2012-2013 Red Hat, Inc. - * All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "xfs.h" -#include "xfs_fs.h" -#include "xfs_format.h" -#include "xfs_log_format.h" -#include "xfs_shared.h" -#include "xfs_trans_resv.h" -#include "xfs_ag.h" -#include "xfs_sb.h" -#include "xfs_mount.h" -#include "xfs_bmap_btree.h" -#include "xfs_inode.h" -#include "xfs_error.h" -#include "xfs_trace.h" -#include "xfs_symlink.h" -#include "xfs_cksum.h" -#include "xfs_trans.h" -#include "xfs_buf_item.h" - - -/* - * Each contiguous block has a header, so it is not just a simple pathlen - * to FSB conversion. - */ -int -xfs_symlink_blocks( - struct xfs_mount *mp, - int pathlen) -{ - int buflen = XFS_SYMLINK_BUF_SPACE(mp, mp->m_sb.sb_blocksize); - - return (pathlen + buflen - 1) / buflen; -} - -int -xfs_symlink_hdr_set( - struct xfs_mount *mp, - xfs_ino_t ino, - uint32_t offset, - uint32_t size, - struct xfs_buf *bp) -{ - struct xfs_dsymlink_hdr *dsl = bp->b_addr; - - if (!xfs_sb_version_hascrc(&mp->m_sb)) - return 0; - - dsl->sl_magic = cpu_to_be32(XFS_SYMLINK_MAGIC); - dsl->sl_offset = cpu_to_be32(offset); - dsl->sl_bytes = cpu_to_be32(size); - uuid_copy(&dsl->sl_uuid, &mp->m_sb.sb_uuid); - dsl->sl_owner = cpu_to_be64(ino); - dsl->sl_blkno = cpu_to_be64(bp->b_bn); - bp->b_ops = &xfs_symlink_buf_ops; - - return sizeof(struct xfs_dsymlink_hdr); -} - -/* - * Checking of the symlink header is split into two parts. the verifier does - * CRC, location and bounds checking, the unpacking function checks the path - * parameters and owner. - */ -bool -xfs_symlink_hdr_ok( - xfs_ino_t ino, - uint32_t offset, - uint32_t size, - struct xfs_buf *bp) -{ - struct xfs_dsymlink_hdr *dsl = bp->b_addr; - - if (offset != be32_to_cpu(dsl->sl_offset)) - return false; - if (size != be32_to_cpu(dsl->sl_bytes)) - return false; - if (ino != be64_to_cpu(dsl->sl_owner)) - return false; - - /* ok */ - return true; -} - -static bool -xfs_symlink_verify( - struct xfs_buf *bp) -{ - struct xfs_mount *mp = bp->b_target->bt_mount; - struct xfs_dsymlink_hdr *dsl = bp->b_addr; - - if (!xfs_sb_version_hascrc(&mp->m_sb)) - return false; - if (dsl->sl_magic != cpu_to_be32(XFS_SYMLINK_MAGIC)) - return false; - if (!uuid_equal(&dsl->sl_uuid, &mp->m_sb.sb_uuid)) - return false; - if (bp->b_bn != be64_to_cpu(dsl->sl_blkno)) - return false; - if (be32_to_cpu(dsl->sl_offset) + - be32_to_cpu(dsl->sl_bytes) >= MAXPATHLEN) - return false; - if (dsl->sl_owner == 0) - return false; - - return true; -} - -static void -xfs_symlink_read_verify( - struct xfs_buf *bp) -{ - struct xfs_mount *mp = bp->b_target->bt_mount; - - /* no verification of non-crc buffers */ - if (!xfs_sb_version_hascrc(&mp->m_sb)) - return; - - if (!xfs_buf_verify_cksum(bp, XFS_SYMLINK_CRC_OFF)) - xfs_buf_ioerror(bp, EFSBADCRC); - else if (!xfs_symlink_verify(bp)) - xfs_buf_ioerror(bp, EFSCORRUPTED); - - if (bp->b_error) - xfs_verifier_error(bp); -} - -static void -xfs_symlink_write_verify( - struct xfs_buf *bp) -{ - struct xfs_mount *mp = bp->b_target->bt_mount; - struct xfs_buf_log_item *bip = bp->b_fspriv; - - /* no verification of non-crc buffers */ - if (!xfs_sb_version_hascrc(&mp->m_sb)) - return; - - if (!xfs_symlink_verify(bp)) { - xfs_buf_ioerror(bp, EFSCORRUPTED); - xfs_verifier_error(bp); - return; - } - - if (bip) { - struct xfs_dsymlink_hdr *dsl = bp->b_addr; - dsl->sl_lsn = cpu_to_be64(bip->bli_item.li_lsn); - } - xfs_buf_update_cksum(bp, XFS_SYMLINK_CRC_OFF); -} - -const struct xfs_buf_ops xfs_symlink_buf_ops = { - .verify_read = xfs_symlink_read_verify, - .verify_write = xfs_symlink_write_verify, -}; - -void -xfs_symlink_local_to_remote( - struct xfs_trans *tp, - struct xfs_buf *bp, - struct xfs_inode *ip, - struct xfs_ifork *ifp) -{ - struct xfs_mount *mp = ip->i_mount; - char *buf; - - if (!xfs_sb_version_hascrc(&mp->m_sb)) { - bp->b_ops = NULL; - memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes); - return; - } - - /* - * As this symlink fits in an inode literal area, it must also fit in - * the smallest buffer the filesystem supports. - */ - ASSERT(BBTOB(bp->b_length) >= - ifp->if_bytes + sizeof(struct xfs_dsymlink_hdr)); - - bp->b_ops = &xfs_symlink_buf_ops; - - buf = bp->b_addr; - buf += xfs_symlink_hdr_set(mp, ip->i_ino, 0, ifp->if_bytes, bp); - memcpy(buf, ifp->if_u1.if_data, ifp->if_bytes); -} |