^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) /* -*- mode: c; c-basic-offset: 8; -*-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * vim: noexpandtab sw=8 ts=8 sts=0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * dcache.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * dentry cache handling code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 2002, 2004 Oracle. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <cluster/masklog.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "ocfs2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "alloc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "dcache.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "dlmglue.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "file.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "ocfs2_trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) void ocfs2_dentry_attach_gen(struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) unsigned long gen =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) OCFS2_I(d_inode(dentry->d_parent))->ip_dir_lock_gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) BUG_ON(d_inode(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) dentry->d_fsdata = (void *)gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int ocfs2_dentry_revalidate(struct dentry *dentry, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int ret = 0; /* if all else fails, just return false */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct ocfs2_super *osb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (flags & LOOKUP_RCU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return -ECHILD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) osb = OCFS2_SB(dentry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) trace_ocfs2_dentry_revalidate(dentry, dentry->d_name.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) dentry->d_name.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* For a negative dentry -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * check the generation number of the parent and compare with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * one stored in the inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (inode == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned long gen = (unsigned long) dentry->d_fsdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned long pgen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) spin_lock(&dentry->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) pgen = OCFS2_I(d_inode(dentry->d_parent))->ip_dir_lock_gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) spin_unlock(&dentry->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) trace_ocfs2_dentry_revalidate_negative(dentry->d_name.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) dentry->d_name.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) pgen, gen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (gen != pgen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) goto valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) BUG_ON(!osb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (inode == osb->root_inode || is_bad_inode(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) spin_lock(&OCFS2_I(inode)->ip_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /* did we or someone else delete this inode? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) spin_unlock(&OCFS2_I(inode)->ip_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) trace_ocfs2_dentry_revalidate_delete(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) (unsigned long long)OCFS2_I(inode)->ip_blkno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) spin_unlock(&OCFS2_I(inode)->ip_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * We don't need a cluster lock to test this because once an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * inode nlink hits zero, it never goes back.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (inode->i_nlink == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) trace_ocfs2_dentry_revalidate_orphaned(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) (unsigned long long)OCFS2_I(inode)->ip_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) S_ISDIR(inode->i_mode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) goto bail;
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * If the last lookup failed to create dentry lock, let us
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * redo it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (!dentry->d_fsdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) trace_ocfs2_dentry_revalidate_nofsdata(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) (unsigned long long)OCFS2_I(inode)->ip_blkno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) valid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) bail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) trace_ocfs2_dentry_revalidate_ret(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static int ocfs2_match_dentry(struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) u64 parent_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int skip_unhashed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct inode *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * ocfs2_lookup() does a d_splice_alias() _before_ attaching
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * to the lock data, so we skip those here, otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * ocfs2_dentry_attach_lock() will get its original dentry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * back.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (!dentry->d_fsdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!dentry->d_parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (skip_unhashed && d_unhashed(dentry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) parent = d_inode(dentry->d_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /* Negative parent dentry? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (!parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* Name is in a different directory. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (OCFS2_I(parent)->ip_blkno != parent_blkno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * Walk the inode alias list, and find a dentry which has a given
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * parent. ocfs2_dentry_attach_lock() wants to find _any_ alias as it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * is looking for a dentry_lock reference. The downconvert thread is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * looking to unhash aliases, so we allow it to skip any that already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * have that property.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct dentry *ocfs2_find_local_alias(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) u64 parent_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int skip_unhashed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct dentry *dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) spin_lock(&inode->i_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) spin_lock(&dentry->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) trace_ocfs2_find_local_alias(dentry->d_name.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) dentry->d_name.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) dget_dlock(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) spin_unlock(&dentry->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) spin_unlock(&inode->i_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) spin_unlock(&dentry->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) spin_unlock(&inode->i_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) DEFINE_SPINLOCK(dentry_attach_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) * Attach this dentry to a cluster lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * Dentry locks cover all links in a given directory to a particular
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * inode. We do this so that ocfs2 can build a lock name which all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * nodes in the cluster can agree on at all times. Shoving full names
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * in the cluster lock won't work due to size restrictions. Covering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * links inside of a directory is a good compromise because it still
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * allows us to use the parent directory lock to synchronize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * Call this function with the parent dir semaphore and the parent dir
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * cluster lock held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * The dir semaphore will protect us from having to worry about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * concurrent processes on our node trying to attach a lock at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * same time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * The dir cluster lock (held at either PR or EX mode) protects us
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * from unlink and rename on other nodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * A dput() can happen asynchronously due to pruning, so we cover
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * attaching and detaching the dentry lock with a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * dentry_attach_lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * A node which has done lookup on a name retains a protected read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * lock until final dput. If the user requests and unlink or rename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * the protected read is upgraded to an exclusive lock. Other nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * who have seen the dentry will then be informed that they need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * downgrade their lock, which will involve d_delete on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * dentry. This happens in ocfs2_dentry_convert_worker().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) int ocfs2_dentry_attach_lock(struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) u64 parent_blkno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct dentry *alias;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) trace_ocfs2_dentry_attach_lock(dentry->d_name.len, dentry->d_name.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) (unsigned long long)parent_blkno, dl);
^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) * Negative dentry. We ignore these for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * XXX: Could we can improve ocfs2_dentry_revalidate() by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * tracking these?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (d_really_is_negative(dentry) && dentry->d_fsdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) /* Converting a negative dentry to positive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) Clear dentry->d_fsdata */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) dentry->d_fsdata = dl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (dl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) mlog_bug_on_msg(dl->dl_parent_blkno != parent_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) " \"%pd\": old parent: %llu, new: %llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) (unsigned long long)parent_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) (unsigned long long)dl->dl_parent_blkno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) alias = ocfs2_find_local_alias(inode, parent_blkno, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (alias) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) * Great, an alias exists, which means we must have a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) * dentry lock already. We can just grab the lock off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * the alias and add it to the list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * We're depending here on the fact that this dentry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * was found and exists in the dcache and so must have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * a reference to the dentry_lock because we can't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * race creates. Final dput() cannot happen on it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * since we have it pinned, so our reference is safe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) dl = alias->d_fsdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) mlog_bug_on_msg(!dl, "parent %llu, ino %llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) (unsigned long long)parent_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) (unsigned long long)OCFS2_I(inode)->ip_blkno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) mlog_bug_on_msg(dl->dl_parent_blkno != parent_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) " \"%pd\": old parent: %llu, new: %llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) (unsigned long long)parent_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) (unsigned long long)dl->dl_parent_blkno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) trace_ocfs2_dentry_attach_lock_found(dl->dl_lockres.l_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) (unsigned long long)parent_blkno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) (unsigned long long)OCFS2_I(inode)->ip_blkno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) goto out_attach;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * There are no other aliases
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) dl = kmalloc(sizeof(*dl), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (!dl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) mlog_errno(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) dl->dl_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) * Does this have to happen below, for all attaches, in case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) * the struct inode gets blown away by the downconvert thread?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) dl->dl_inode = igrab(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) dl->dl_parent_blkno = parent_blkno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) ocfs2_dentry_lock_res_init(dl, parent_blkno, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) out_attach:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) spin_lock(&dentry_attach_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (unlikely(dentry->d_fsdata && !alias)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) /* d_fsdata is set by a racing thread which is doing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * the same thing as this thread is doing. Leave the racing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * thread going ahead and we return here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) spin_unlock(&dentry_attach_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) iput(dl->dl_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) ocfs2_lock_res_free(&dl->dl_lockres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) kfree(dl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) dentry->d_fsdata = dl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) dl->dl_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) spin_unlock(&dentry_attach_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * This actually gets us our PRMODE level lock. From now on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) * we'll have a notification if one of these names is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * destroyed on another node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) ret = ocfs2_dentry_lock(dentry, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) ocfs2_dentry_unlock(dentry, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) mlog_errno(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * In case of error, manually free the allocation and do the iput().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * We need to do this because error here means no d_instantiate(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * which means iput() will not be called during dput(dentry).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (ret < 0 && !alias) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) ocfs2_lock_res_free(&dl->dl_lockres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) BUG_ON(dl->dl_count != 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) spin_lock(&dentry_attach_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) dentry->d_fsdata = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) spin_unlock(&dentry_attach_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) kfree(dl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) dput(alias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return ret;
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * ocfs2_dentry_iput() and friends.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) * At this point, our particular dentry is detached from the inodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) * alias list, so there's no way that the locking code can find it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * The interesting stuff happens when we determine that our lock needs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * to go away because this is the last subdir alias in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) * system. This function needs to handle a couple things:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) * 1) Synchronizing lock shutdown with the downconvert threads. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * is already handled for us via the lockres release drop function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * called in ocfs2_release_dentry_lock()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * 2) A race may occur when we're doing our lock shutdown and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * another process wants to create a new dentry lock. Right now we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * let them race, which means that for a very short while, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) * node might have two locks on a lock resource. This should be a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * problem though because one of them is in the process of being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) * thrown out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) static void ocfs2_drop_dentry_lock(struct ocfs2_super *osb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) struct ocfs2_dentry_lock *dl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) iput(dl->dl_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) ocfs2_lock_res_free(&dl->dl_lockres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) kfree(dl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) struct ocfs2_dentry_lock *dl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) int unlock = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) BUG_ON(dl->dl_count == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) spin_lock(&dentry_attach_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) dl->dl_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) unlock = !dl->dl_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) spin_unlock(&dentry_attach_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (unlock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) ocfs2_drop_dentry_lock(osb, dl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static void ocfs2_dentry_iput(struct dentry *dentry, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (!dl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * No dentry lock is ok if we're disconnected or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * unhashed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (!(dentry->d_flags & DCACHE_DISCONNECTED) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) !d_unhashed(dentry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) unsigned long long ino = 0ULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) ino = (unsigned long long)OCFS2_I(inode)->ip_blkno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) mlog(ML_ERROR, "Dentry is missing cluster lock. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) "inode: %llu, d_flags: 0x%x, d_name: %pd\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) ino, dentry->d_flags, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) mlog_bug_on_msg(dl->dl_count == 0, "dentry: %pd, count: %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) dentry, dl->dl_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) ocfs2_dentry_lock_put(OCFS2_SB(dentry->d_sb), dl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * d_move(), but keep the locks in sync.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * When we are done, "dentry" will have the parent dir and name of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * "target", which will be thrown away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * We manually update the lock of "dentry" if need be.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * "target" doesn't have it's dentry lock touched - we allow the later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * dput() to handle this for us.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * This is called during ocfs2_rename(), while holding parent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) * directory locks. The dentries have already been deleted on other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) * nodes via ocfs2_remote_dentry_delete().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) * Normally, the VFS handles the d_move() for the file system, after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) * the ->rename() callback. OCFS2 wants to handle this internally, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) * the new lock can be created atomically with respect to the cluster.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct inode *old_dir, struct inode *new_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct ocfs2_super *osb = OCFS2_SB(old_dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) struct inode *inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * Move within the same directory, so the actual lock info won't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) * change.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * XXX: Is there any advantage to dropping the lock here?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) if (old_dir == new_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) goto out_move;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) ocfs2_dentry_lock_put(osb, dentry->d_fsdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) dentry->d_fsdata = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) ret = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(new_dir)->ip_blkno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) mlog_errno(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) out_move:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) d_move(dentry, target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) const struct dentry_operations ocfs2_dentry_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) .d_revalidate = ocfs2_dentry_revalidate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) .d_iput = ocfs2_dentry_iput,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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