^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* AFS silly rename handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2019 Red Hat, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Written by David Howells (dhowells@redhat.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * - Derived from NFS's sillyrename.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/fsnotify.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) static void afs_silly_rename_success(struct afs_operation *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) _enter("op=%08x", op->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) afs_check_dir_conflict(op, &op->file[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) afs_vnode_commit_status(op, &op->file[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static void afs_silly_rename_edit_dir(struct afs_operation *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct afs_vnode_param *dvp = &op->file[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct afs_vnode *dvnode = dvp->vnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct afs_vnode *vnode = AFS_FS_I(d_inode(op->dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct dentry *old = op->dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct dentry *new = op->dentry_2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) spin_lock(&old->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) old->d_flags |= DCACHE_NFSFS_RENAMED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) spin_unlock(&old->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) if (dvnode->silly_key != op->key) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) key_put(dvnode->silly_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) dvnode->silly_key = key_get(op->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) down_write(&dvnode->validate_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) dvnode->status.data_version == dvp->dv_before + dvp->dv_delta) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) afs_edit_dir_remove(dvnode, &old->d_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) afs_edit_dir_for_silly_0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) afs_edit_dir_add(dvnode, &new->d_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) &vnode->fid, afs_edit_dir_for_silly_1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) up_write(&dvnode->validate_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static const struct afs_operation_ops afs_silly_rename_operation = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .issue_afs_rpc = afs_fs_rename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .issue_yfs_rpc = yfs_fs_rename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .success = afs_silly_rename_success,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .edit_dir = afs_silly_rename_edit_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * Actually perform the silly rename step.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int afs_do_silly_rename(struct afs_vnode *dvnode, struct afs_vnode *vnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct dentry *old, struct dentry *new,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct afs_operation *op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) _enter("%pd,%pd", old, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) op = afs_alloc_operation(key, dvnode->volume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (IS_ERR(op))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return PTR_ERR(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) afs_op_set_vnode(op, 0, dvnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) afs_op_set_vnode(op, 1, dvnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) op->file[0].dv_delta = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) op->file[1].dv_delta = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) op->file[0].modification = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) op->file[1].modification = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) op->file[0].update_ctime = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) op->file[1].update_ctime = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) op->dentry = old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) op->dentry_2 = new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) op->ops = &afs_silly_rename_operation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) trace_afs_silly_rename(vnode, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return afs_do_sync_operation(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * afs_sillyrename - Perform a silly-rename of a dentry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * AFS is stateless and the server doesn't know when the client is holding a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * file open. To prevent application problems when a file is unlinked while
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * it's still open, the client performs a "silly-rename". That is, it renames
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * the file to a hidden file in the same directory, and only performs the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * unlink once the last reference to it is put.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * The final cleanup is done during dentry_iput.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int afs_sillyrename(struct afs_vnode *dvnode, struct afs_vnode *vnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct dentry *dentry, struct key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static unsigned int sillycounter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct dentry *sdentry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) unsigned char silly[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) _enter("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* We don't allow a dentry to be silly-renamed twice. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) sdentry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int slen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) dput(sdentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) sillycounter++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* Create a silly name. Note that the ".__afs" prefix is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * understood by the salvager and must not be changed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) slen = scnprintf(silly, sizeof(silly), ".__afs%04X", sillycounter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) sdentry = lookup_one_len(silly, dentry->d_parent, slen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* N.B. Better to return EBUSY here ... it could be dangerous
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * to delete the file while it's in use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (IS_ERR(sdentry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) } while (!d_is_negative(sdentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) ihold(&vnode->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) ret = afs_do_silly_rename(dvnode, vnode, dentry, sdentry, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) switch (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* The rename succeeded. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) set_bit(AFS_VNODE_SILLY_DELETED, &vnode->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) d_move(dentry, sdentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) case -ERESTARTSYS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* The result of the rename is unknown. Play it safe by forcing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * a new lookup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) d_drop(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) d_drop(sdentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) iput(&vnode->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) dput(sdentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) _leave(" = %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static void afs_silly_unlink_success(struct afs_operation *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) _enter("op=%08x", op->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) afs_check_dir_conflict(op, &op->file[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) afs_vnode_commit_status(op, &op->file[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) afs_vnode_commit_status(op, &op->file[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) afs_update_dentry_version(op, &op->file[0], op->dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static void afs_silly_unlink_edit_dir(struct afs_operation *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct afs_vnode_param *dvp = &op->file[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct afs_vnode *dvnode = dvp->vnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) _enter("op=%08x", op->debug_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) down_write(&dvnode->validate_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) dvnode->status.data_version == dvp->dv_before + dvp->dv_delta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) afs_edit_dir_remove(dvnode, &op->dentry->d_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) afs_edit_dir_for_unlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) up_write(&dvnode->validate_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static const struct afs_operation_ops afs_silly_unlink_operation = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) .issue_afs_rpc = afs_fs_remove_file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .issue_yfs_rpc = yfs_fs_remove_file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) .success = afs_silly_unlink_success,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) .aborted = afs_check_for_remote_deletion,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) .edit_dir = afs_silly_unlink_edit_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * Tell the server to remove a sillyrename file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static int afs_do_silly_unlink(struct afs_vnode *dvnode, struct afs_vnode *vnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct dentry *dentry, struct key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct afs_operation *op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) _enter("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) op = afs_alloc_operation(NULL, dvnode->volume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (IS_ERR(op))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return PTR_ERR(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) afs_op_set_vnode(op, 0, dvnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) afs_op_set_vnode(op, 1, vnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) op->file[0].dv_delta = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) op->file[0].modification = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) op->file[0].update_ctime = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) op->file[1].op_unlinked = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) op->file[1].update_ctime = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) op->dentry = dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) op->ops = &afs_silly_unlink_operation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) trace_afs_silly_rename(vnode, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) afs_begin_vnode_operation(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) afs_wait_for_operation(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* If there was a conflict with a third party, check the status of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * unlinked vnode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (op->error == 0 && (op->flags & AFS_OPERATION_DIR_CONFLICT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) op->file[1].update_ctime = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) op->fetch_status.which = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) op->ops = &afs_fetch_status_operation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) afs_begin_vnode_operation(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) afs_wait_for_operation(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return afs_put_operation(op);
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * Remove sillyrename file on iput.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) int afs_silly_iput(struct dentry *dentry, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct afs_vnode *dvnode = AFS_FS_I(d_inode(dentry->d_parent));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct afs_vnode *vnode = AFS_FS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct dentry *alias;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) _enter("%p{%pd},%llx", dentry, dentry, vnode->fid.vnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) down_read(&dvnode->rmdir_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) alias = d_alloc_parallel(dentry->d_parent, &dentry->d_name, &wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (IS_ERR(alias)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) up_read(&dvnode->rmdir_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (!d_in_lookup(alias)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* We raced with lookup... See if we need to transfer the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * sillyrename information to the aliased dentry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) spin_lock(&alias->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (d_really_is_positive(alias) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) !(alias->d_flags & DCACHE_NFSFS_RENAMED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) alias->d_flags |= DCACHE_NFSFS_RENAMED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) spin_unlock(&alias->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) up_read(&dvnode->rmdir_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) dput(alias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) /* Stop lock-release from complaining. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) spin_lock(&vnode->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) vnode->lock_state = AFS_VNODE_LOCK_DELETED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) trace_afs_flock_ev(vnode, NULL, afs_flock_silly_delete, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) spin_unlock(&vnode->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) afs_do_silly_unlink(dvnode, vnode, dentry, dvnode->silly_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) up_read(&dvnode->rmdir_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) d_lookup_done(alias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) dput(alias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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