vfs.c (bb4d53d66e4b8c8b8e5634802262e53851a2d2db) vfs.c (dd8dd403d7b223cc77ee89d8d09caf045e90e648)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * File operations used by nfsd. Some of these have been ripped from
4 * other parts of the kernel because they weren't exported, others
5 * are partial duplicates with added or changed functionality.
6 *
7 * Note that several functions dget() the dentry upon which they want
8 * to act, most notably those that create directory entries. Response

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1260 struct iattr *iap = attrs->na_iattr;
1261 __be32 err;
1262 int host_err;
1263
1264 dentry = fhp->fh_dentry;
1265 dirp = d_inode(dentry);
1266
1267 dchild = dget(resfhp->fh_dentry);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * File operations used by nfsd. Some of these have been ripped from
4 * other parts of the kernel because they weren't exported, others
5 * are partial duplicates with added or changed functionality.
6 *
7 * Note that several functions dget() the dentry upon which they want
8 * to act, most notably those that create directory entries. Response

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1260 struct iattr *iap = attrs->na_iattr;
1261 __be32 err;
1262 int host_err;
1263
1264 dentry = fhp->fh_dentry;
1265 dirp = d_inode(dentry);
1266
1267 dchild = dget(resfhp->fh_dentry);
1268 if (!fhp->fh_locked) {
1269 WARN_ONCE(1, "nfsd_create: parent %pd2 not locked!\n",
1270 dentry);
1271 err = nfserr_io;
1272 goto out;
1273 }
1274
1275 err = nfsd_permission(rqstp, fhp->fh_export, dentry, NFSD_MAY_CREATE);
1276 if (err)
1277 goto out;
1278
1279 if (!(iap->ia_valid & ATTR_MODE))
1280 iap->ia_mode = 0;
1281 iap->ia_mode = (iap->ia_mode & S_IALLUGO) | type;
1282

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1629
1630retry:
1631 host_err = fh_want_write(ffhp);
1632 if (host_err) {
1633 err = nfserrno(host_err);
1634 goto out;
1635 }
1636
1268 err = nfsd_permission(rqstp, fhp->fh_export, dentry, NFSD_MAY_CREATE);
1269 if (err)
1270 goto out;
1271
1272 if (!(iap->ia_valid & ATTR_MODE))
1273 iap->ia_mode = 0;
1274 iap->ia_mode = (iap->ia_mode & S_IALLUGO) | type;
1275

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1622
1623retry:
1624 host_err = fh_want_write(ffhp);
1625 if (host_err) {
1626 err = nfserrno(host_err);
1627 goto out;
1628 }
1629
1637 /* cannot use fh_lock as we need deadlock protective ordering
1638 * so do it by hand */
1639 trap = lock_rename(tdentry, fdentry);
1630 trap = lock_rename(tdentry, fdentry);
1640 ffhp->fh_locked = tfhp->fh_locked = true;
1641 fh_fill_pre_attrs(ffhp);
1642 fh_fill_pre_attrs(tfhp);
1643
1644 odentry = lookup_one_len(fname, fdentry, flen);
1645 host_err = PTR_ERR(odentry);
1646 if (IS_ERR(odentry))
1647 goto out_nfserr;
1648

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1688 }
1689 }
1690 out_dput_new:
1691 dput(ndentry);
1692 out_dput_old:
1693 dput(odentry);
1694 out_nfserr:
1695 err = nfserrno(host_err);
1631 fh_fill_pre_attrs(ffhp);
1632 fh_fill_pre_attrs(tfhp);
1633
1634 odentry = lookup_one_len(fname, fdentry, flen);
1635 host_err = PTR_ERR(odentry);
1636 if (IS_ERR(odentry))
1637 goto out_nfserr;
1638

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1678 }
1679 }
1680 out_dput_new:
1681 dput(ndentry);
1682 out_dput_old:
1683 dput(odentry);
1684 out_nfserr:
1685 err = nfserrno(host_err);
1696 /*
1697 * We cannot rely on fh_unlock on the two filehandles,
1698 * as that would do the wrong thing if the two directories
1699 * were the same, so again we do it by hand.
1700 */
1686
1701 if (!close_cached) {
1702 fh_fill_post_attrs(ffhp);
1703 fh_fill_post_attrs(tfhp);
1704 }
1705 unlock_rename(tdentry, fdentry);
1687 if (!close_cached) {
1688 fh_fill_post_attrs(ffhp);
1689 fh_fill_post_attrs(tfhp);
1690 }
1691 unlock_rename(tdentry, fdentry);
1706 ffhp->fh_locked = tfhp->fh_locked = false;
1707 fh_drop_write(ffhp);
1708
1709 /*
1710 * If the target dentry has cached open files, then we need to try to
1711 * close them prior to doing the rename. Flushing delayed fput
1712 * shouldn't be done with locks held however, so we delay it until this
1713 * point and then reattempt the whole shebang.
1714 */

--- 593 unchanged lines hidden --- 		1692 fh_drop_write(ffhp);
1693
1694 /*
1695 * If the target dentry has cached open files, then we need to try to
1696 * close them prior to doing the rename. Flushing delayed fput
1697 * shouldn't be done with locks held however, so we delay it until this
1698 * point and then reattempt the whole shebang.
1699 */

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