^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2000-2006 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2012-2013 Red Hat, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include "xfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include "xfs_shared.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "xfs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "xfs_format.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "xfs_log_format.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "xfs_trans_resv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "xfs_bit.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "xfs_mount.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "xfs_dir2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "xfs_inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "xfs_bmap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "xfs_bmap_btree.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "xfs_quota.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "xfs_symlink.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "xfs_trans_space.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "xfs_trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "xfs_trans.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* ----- Kernel only functions below ----- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) xfs_readlink_bmap_ilocked(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct xfs_inode *ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) char *link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct xfs_mount *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct xfs_buf *bp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) xfs_daddr_t d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) char *cur_chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) int pathlen = ip->i_d.di_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int nmaps = XFS_SYMLINK_MAPS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int byte_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int fsblocks = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) fsblocks = xfs_symlink_blocks(mp, pathlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) for (n = 0; n < nmaps; n++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) error = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) &bp, &xfs_symlink_buf_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (pathlen < byte_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) byte_cnt = pathlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) cur_chunk = bp->b_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (xfs_sb_version_hascrc(&mp->m_sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!xfs_symlink_hdr_ok(ip->i_ino, offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) byte_cnt, bp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) error = -EFSCORRUPTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) xfs_alert(mp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) offset, byte_cnt, ip->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) xfs_buf_relse(bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) cur_chunk += sizeof(struct xfs_dsymlink_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) memcpy(link + offset, cur_chunk, byte_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) pathlen -= byte_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) offset += byte_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) xfs_buf_relse(bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ASSERT(pathlen == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) link[ip->i_d.di_size] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) xfs_readlink(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct xfs_inode *ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) char *link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct xfs_mount *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) xfs_fsize_t pathlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) trace_xfs_readlink(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ASSERT(!(ip->i_df.if_flags & XFS_IFINLINE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (XFS_FORCED_SHUTDOWN(mp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) xfs_ilock(ip, XFS_ILOCK_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) pathlen = ip->i_d.di_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!pathlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (pathlen < 0 || pathlen > XFS_SYMLINK_MAXLEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) __func__, (unsigned long long) ip->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) (long long) pathlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) ASSERT(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) error = -EFSCORRUPTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) error = xfs_readlink_bmap_ilocked(ip, link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) xfs_iunlock(ip, XFS_ILOCK_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) xfs_symlink(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct xfs_inode *dp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct xfs_name *link_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) const char *target_path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct xfs_inode **ipp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct xfs_mount *mp = dp->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct xfs_trans *tp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct xfs_inode *ip = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int pathlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) bool unlock_dp_on_error = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) xfs_fileoff_t first_fsb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) xfs_filblks_t fs_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int nmaps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) xfs_daddr_t d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) const char *cur_chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) int byte_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) xfs_buf_t *bp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) prid_t prid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct xfs_dquot *udqp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct xfs_dquot *gdqp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct xfs_dquot *pdqp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) uint resblks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) *ipp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) trace_xfs_symlink(dp, link_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (XFS_FORCED_SHUTDOWN(mp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * Check component lengths of the target path name.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) pathlen = strlen(target_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (pathlen >= XFS_SYMLINK_MAXLEN) /* total string too long */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) ASSERT(pathlen > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) prid = xfs_get_initial_prid(dp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * Make sure that we have allocated dquot(s) on disk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) &udqp, &gdqp, &pdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * The symlink will fit into the inode data fork?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * There can't be any attributes so we get the whole variable part.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (pathlen <= XFS_LITINO(mp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) fs_blocks = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) fs_blocks = xfs_symlink_blocks(mp, pathlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) error = xfs_trans_alloc(mp, &M_RES(mp)->tr_symlink, resblks, 0, 0, &tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) goto out_release_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) unlock_dp_on_error = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * Check whether the directory allows new symlinks or not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) error = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) goto out_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * Reserve disk quota : blocks and inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) pdqp, resblks, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) goto out_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * Allocate an inode for the symlink.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) prid, &ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) goto out_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * Now we join the directory inode to the transaction. We do not do it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * earlier because xfs_dir_ialloc might commit the previous transaction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * (and release all the locks). An error from here on will result in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * the transaction cancel unlocking dp so don't do it explicitly in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * error path.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) unlock_dp_on_error = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * Also attach the dquot(s) to it, if applicable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) resblks -= XFS_IALLOC_SPACE_RES(mp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * If the symlink will fit into the inode, write it inline.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (pathlen <= XFS_IFORK_DSIZE(ip)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) xfs_init_local_fork(ip, XFS_DATA_FORK, target_path, pathlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) ip->i_d.di_size = pathlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) ip->i_df.if_format = XFS_DINODE_FMT_LOCAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) first_fsb = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) nmaps = XFS_SYMLINK_MAPS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) XFS_BMAPI_METADATA, resblks, mval, &nmaps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) goto out_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) resblks -= fs_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) ip->i_d.di_size = pathlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) cur_chunk = target_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) for (n = 0; n < nmaps; n++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) error = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) BTOBB(byte_cnt), 0, &bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) goto out_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) bp->b_ops = &xfs_symlink_buf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) byte_cnt = min(byte_cnt, pathlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) buf = bp->b_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) byte_cnt, bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) memcpy(buf, cur_chunk, byte_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) cur_chunk += byte_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) pathlen -= byte_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) offset += byte_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) (char *)bp->b_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) ASSERT(pathlen == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * Create the directory entry for the symlink.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, resblks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) goto out_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * If this is a synchronous mount, make sure that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * symlink transaction goes to disk before returning to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * the user.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) xfs_trans_set_sync(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) error = xfs_trans_commit(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) goto out_release_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) xfs_qm_dqrele(udqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) xfs_qm_dqrele(gdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) xfs_qm_dqrele(pdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) *ipp = ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) out_trans_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) xfs_trans_cancel(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) out_release_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * Wait until after the current transaction is aborted to finish the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) * setup of the inode and release the inode. This prevents recursive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * transactions and deadlocks from xfs_inactive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (ip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) xfs_finish_inode_setup(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) xfs_irele(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) xfs_qm_dqrele(udqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) xfs_qm_dqrele(gdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) xfs_qm_dqrele(pdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (unlock_dp_on_error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) xfs_iunlock(dp, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) * Free a symlink that has blocks associated with it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * Note: zero length symlinks are not allowed to exist. When we set the size to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * zero, also change it to a regular file so that it does not get written to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * disk as a zero length symlink. The inode is on the unlinked list already, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * userspace cannot find this inode anymore, so this change is not user visible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * but allows us to catch corrupt zero-length symlinks in the verifiers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) xfs_inactive_symlink_rmt(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct xfs_inode *ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) xfs_buf_t *bp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) int done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) xfs_mount_t *mp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) int nmaps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) xfs_trans_t *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * We're freeing a symlink that has some
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) * blocks allocated to it. Free the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * blocks here. We know that we've got
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * either 1 or 2 extents and that we can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * free them all in one bunmapi call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) ASSERT(ip->i_df.if_nextents > 0 && ip->i_df.if_nextents <= 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) xfs_ilock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) xfs_trans_ijoin(tp, ip, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) * Lock the inode, fix the size, turn it into a regular file and join it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * to the transaction. Hold it so in the normal path, we still have it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * locked for the second transaction. In the error paths we need it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) * held so the cancel won't rele it, see below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) size = (int)ip->i_d.di_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) ip->i_d.di_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) VFS_I(ip)->i_mode = (VFS_I(ip)->i_mode & ~S_IFMT) | S_IFREG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * Find the block(s) so we can inval and unmap them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) done = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) nmaps = ARRAY_SIZE(mval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) mval, &nmaps, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) goto error_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * Invalidate the block(s). No validation is done.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) for (i = 0; i < nmaps; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) error = xfs_trans_get_buf(tp, mp->m_ddev_targp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) XFS_FSB_TO_DADDR(mp, mval[i].br_startblock),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) &bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) goto error_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) xfs_trans_binval(tp, bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * Unmap the dead block(s) to the dfops.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) error = xfs_bunmapi(tp, ip, 0, size, 0, nmaps, &done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) goto error_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) ASSERT(done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) * Commit the transaction. This first logs the EFI and the inode, then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) * rolls and commits the transaction that frees the extents.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) error = xfs_trans_commit(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) ASSERT(XFS_FORCED_SHUTDOWN(mp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) goto error_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) * Remove the memory for extent descriptions (just bookkeeping).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) if (ip->i_df.if_bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) ASSERT(ip->i_df.if_bytes == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) xfs_iunlock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) error_trans_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) xfs_trans_cancel(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) error_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) xfs_iunlock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) * xfs_inactive_symlink - free a symlink
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) xfs_inactive_symlink(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) struct xfs_inode *ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) struct xfs_mount *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) int pathlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) trace_xfs_inactive_symlink(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (XFS_FORCED_SHUTDOWN(mp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) xfs_ilock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) pathlen = (int)ip->i_d.di_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ASSERT(pathlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (pathlen <= 0 || pathlen > XFS_SYMLINK_MAXLEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) __func__, (unsigned long long)ip->i_ino, pathlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) xfs_iunlock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) ASSERT(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return -EFSCORRUPTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * Inline fork state gets removed by xfs_difree() so we have nothing to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) * do here in that case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) if (ip->i_df.if_flags & XFS_IFINLINE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) xfs_iunlock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) xfs_iunlock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) /* remove the remote symlink */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) return xfs_inactive_symlink_rmt(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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