int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_weak_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, struct qstr *);
- int (*d_compare)(const struct dentry *, const struct dentry *,
+ int (*d_compare)(const struct dentry *,
unsigned int, const char *, const struct qstr *);
int (*d_delete)(struct dentry *);
int (*d_init)(struct dentry *);
in the instances. Rationale: !@#!@# security_d_instantiate() needs to be
called before we attach dentry to inode and !@#!@##!@$!$#!@#$!@$!@$ smack
->d_instantiate() uses not just ->getxattr() but ->setxattr() as well.
+--
+[mandatory]
+ ->d_compare() doesn't get parent as a separate argument anymore. If you
+ used it for finding the struct super_block involved, dentry->d_sb will
+ work just as well; if it's something more complicated, use dentry->d_parent.
+ Just be careful not to assume that fetching it more than once will yield
+ the same value - in RCU mode it could change under you.
int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_weak_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, struct qstr *);
- int (*d_compare)(const struct dentry *, const struct dentry *,
+ int (*d_compare)(const struct dentry *,
unsigned int, const char *, const struct qstr *);
int (*d_delete)(const struct dentry *);
int (*d_init)(struct dentry *);
* INVALID) so d_lookup() matches it, but we have no lock on it (so
* lock_match() fails) and we spin around real_lookup().
*/
-static int ll_dcompare(const struct dentry *parent, const struct dentry *dentry,
+static int ll_dcompare(const struct dentry *dentry,
unsigned int len, const char *str,
const struct qstr *name)
{
return v9fs_fid_lookup_with_uid(dentry, uid, any);
}
-struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
-{
- struct p9_fid *fid, *ret;
-
- fid = v9fs_fid_lookup(dentry);
- if (IS_ERR(fid))
- return fid;
-
- ret = p9_client_walk(fid, 0, NULL, 1);
- return ret;
-}
-
-static struct p9_fid *v9fs_fid_clone_with_uid(struct dentry *dentry, kuid_t uid)
-{
- struct p9_fid *fid, *ret;
-
- fid = v9fs_fid_lookup_with_uid(dentry, uid, 0);
- if (IS_ERR(fid))
- return fid;
-
- ret = p9_client_walk(fid, 0, NULL, 1);
- return ret;
-}
-
struct p9_fid *v9fs_writeback_fid(struct dentry *dentry)
{
int err;
struct p9_fid *fid;
- fid = v9fs_fid_clone_with_uid(dentry, GLOBAL_ROOT_UID);
+ fid = clone_fid(v9fs_fid_lookup_with_uid(dentry, GLOBAL_ROOT_UID, 0));
if (IS_ERR(fid))
goto error_out;
/*
{
return v9fs_fid_lookup(dentry->d_parent);
}
-struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
+static inline struct p9_fid *clone_fid(struct p9_fid *fid)
+{
+ return IS_ERR(fid) ? fid : p9_client_walk(fid, 0, NULL, 1);
+}
+static inline struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
+{
+ return clone_fid(v9fs_fid_lookup(dentry));
+}
#endif
}
/* clone a fid to use for creation */
- ofid = p9_client_walk(dfid, 0, NULL, 1);
+ ofid = clone_fid(dfid);
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
if (IS_ERR(oldfid))
return PTR_ERR(oldfid);
- olddirfid = v9fs_parent_fid(old_dentry);
+ olddirfid = clone_fid(v9fs_parent_fid(old_dentry));
if (IS_ERR(olddirfid)) {
retval = PTR_ERR(olddirfid);
goto done;
}
- newdirfid = v9fs_parent_fid(new_dentry);
+ newdirfid = clone_fid(v9fs_parent_fid(new_dentry));
if (IS_ERR(newdirfid)) {
retval = PTR_ERR(newdirfid);
goto clunk_olddir;
}
/* clone a fid to use for creation */
- ofid = p9_client_walk(dfid, 0, NULL, 1);
+ ofid = clone_fid(dfid);
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
const void *value, size_t value_len, int flags)
{
struct p9_fid *fid = v9fs_fid_lookup(dentry);
- if (IS_ERR(fid))
- return PTR_ERR(fid);
return v9fs_fid_xattr_set(fid, name, value, value_len, flags);
}
name, value_len, flags);
/* Clone it */
- fid = p9_client_walk(fid, 0, NULL, 1);
+ fid = clone_fid(fid);
if (IS_ERR(fid))
return PTR_ERR(fid);
* requirements of the underlying filesystem.
*/
static int
-adfs_compare(const struct dentry *parent, const struct dentry *dentry,
+adfs_compare(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
int i;
bool
affs_nofilenametruncate(const struct dentry *dentry)
{
- struct inode *inode = d_inode(dentry);
-
- return affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_NO_TRUNCATE);
+ return affs_test_opt(AFFS_SB(dentry->d_sb)->s_flags, SF_NO_TRUNCATE);
}
/* Check if the name is valid for a affs object. */
static int affs_toupper(int ch);
static int affs_hash_dentry(const struct dentry *, struct qstr *);
-static int affs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+static int affs_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
static int affs_intl_toupper(int ch);
static int affs_intl_hash_dentry(const struct dentry *, struct qstr *);
-static int affs_intl_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+static int affs_intl_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
const struct dentry_operations affs_dentry_operations = {
}
static int
-affs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+affs_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return __affs_compare_dentry(len, str, name, affs_toupper,
- affs_nofilenametruncate(parent));
+ affs_nofilenametruncate(dentry));
}
static int
-affs_intl_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+affs_intl_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return __affs_compare_dentry(len, str, name, affs_intl_toupper,
- affs_nofilenametruncate(parent));
+ affs_nofilenametruncate(dentry));
}
void cachefiles_mark_object_inactive(struct cachefiles_cache *cache,
struct cachefiles_object *object)
{
+ blkcnt_t i_blocks = d_backing_inode(object->dentry)->i_blocks;
+
write_lock(&cache->active_lock);
rb_erase(&object->active_node, &cache->active_nodes);
clear_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags);
/* This object can now be culled, so we need to let the daemon know
* that there is something it can remove if it needs to.
*/
- atomic_long_add(d_backing_inode(object->dentry)->i_blocks,
- &cache->b_released);
+ atomic_long_add(i_blocks, &cache->b_released);
if (atomic_inc_return(&cache->f_released))
cachefiles_state_changed(cache);
}
return 0;
}
-static int cifs_ci_compare(const struct dentry *parent, const struct dentry *dentry,
+static int cifs_ci_compare(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
- struct nls_table *codepage = CIFS_SB(parent->d_sb)->local_nls;
+ struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
wchar_t c1, c2;
int i, l1, l2;
call_rcu(&dentry->d_u.d_rcu, __d_free);
}
-/**
- * dentry_rcuwalk_invalidate - invalidate in-progress rcu-walk lookups
- * @dentry: the target dentry
- * After this call, in-progress rcu-walk path lookup will fail. This
- * should be called after unhashing, and after changing d_inode (if
- * the dentry has not already been unhashed).
- */
-static inline void dentry_rcuwalk_invalidate(struct dentry *dentry)
-{
- lockdep_assert_held(&dentry->d_lock);
- /* Go through am invalidation barrier */
- write_seqcount_invalidate(&dentry->d_seq);
-}
-
/*
* Release the dentry's inode, using the filesystem
* d_iput() operation if defined.
__hlist_bl_del(&dentry->d_hash);
dentry->d_hash.pprev = NULL;
hlist_bl_unlock(b);
- dentry_rcuwalk_invalidate(dentry);
+ /* After this call, in-progress rcu-walk path lookup will fail. */
+ write_seqcount_invalidate(&dentry->d_seq);
}
}
EXPORT_SYMBOL(__d_drop);
return false;
return dentry_cmp(dentry, name->name, name->len) == 0;
}
- return parent->d_op->d_compare(parent, dentry,
+ return parent->d_op->d_compare(dentry,
dentry->d_name.len, dentry->d_name.name,
name) == 0;
}
cpu_relax();
goto seqretry;
}
- if (parent->d_op->d_compare(parent, dentry,
+ if (parent->d_op->d_compare(dentry,
tlen, tname, name) != 0)
continue;
} else {
}
EXPORT_SYMBOL(d_delete);
-static void __d_rehash(struct dentry * entry, struct hlist_bl_head *b)
+static void __d_rehash(struct dentry *entry)
{
+ struct hlist_bl_head *b = d_hash(entry->d_name.hash);
BUG_ON(!d_unhashed(entry));
hlist_bl_lock(b);
hlist_bl_add_head_rcu(&entry->d_hash, b);
hlist_bl_unlock(b);
}
-static void _d_rehash(struct dentry * entry)
-{
- __d_rehash(entry, d_hash(entry->d_name.hash));
-}
-
/**
* d_rehash - add an entry back to the hash
* @entry: dentry to add to the hash
void d_rehash(struct dentry * entry)
{
spin_lock(&entry->d_lock);
- _d_rehash(entry);
+ __d_rehash(entry);
spin_unlock(&entry->d_lock);
}
EXPORT_SYMBOL(d_rehash);
raw_write_seqcount_end(&dentry->d_seq);
fsnotify_update_flags(dentry);
}
- _d_rehash(dentry);
+ __d_rehash(dentry);
if (dir)
end_dir_add(dir, n);
spin_unlock(&dentry->d_lock);
alias = NULL;
} else {
__dget_dlock(alias);
- _d_rehash(alias);
+ __d_rehash(alias);
spin_unlock(&alias->d_lock);
}
spin_unlock(&inode->i_lock);
write_seqcount_begin(&dentry->d_seq);
write_seqcount_begin_nested(&target->d_seq, DENTRY_D_LOCK_NESTED);
+ /* unhash both */
/* __d_drop does write_seqcount_barrier, but they're OK to nest. */
-
- /*
- * Move the dentry to the target hash queue. Don't bother checking
- * for the same hash queue because of how unlikely it is.
- */
__d_drop(dentry);
- __d_rehash(dentry, d_hash(target->d_name.hash));
-
- /*
- * Unhash the target (d_delete() is not usable here). If exchanging
- * the two dentries, then rehash onto the other's hash queue.
- */
__d_drop(target);
- if (exchange) {
- __d_rehash(target, d_hash(dentry->d_name.hash));
- }
/* Switch the names.. */
if (exchange)
else
copy_name(dentry, target);
+ /* rehash in new place(s) */
+ __d_rehash(dentry);
+ if (exchange)
+ __d_rehash(target);
+
/* ... and switch them in the tree */
if (IS_ROOT(dentry)) {
/* splicing a tree */
* So we need to perform a case-sensitive match on part 1 and a
* case-insensitive match on part 2.
*/
-static int efivarfs_d_compare(const struct dentry *parent,
- const struct dentry *dentry,
+static int efivarfs_d_compare(const struct dentry *dentry,
unsigned int len, const char *str,
const struct qstr *name)
{
* Compare two msdos names. If either of the names are invalid,
* we fall back to doing the standard name comparison.
*/
-static int msdos_cmp(const struct dentry *parent, const struct dentry *dentry,
+static int msdos_cmp(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
- struct fat_mount_options *options = &MSDOS_SB(parent->d_sb)->options;
+ struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options;
unsigned char a_msdos_name[MSDOS_NAME], b_msdos_name[MSDOS_NAME];
int error;
/*
* Case insensitive compare of two vfat names.
*/
-static int vfat_cmpi(const struct dentry *parent, const struct dentry *dentry,
+static int vfat_cmpi(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
- struct nls_table *t = MSDOS_SB(parent->d_sb)->nls_io;
+ struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
unsigned int alen, blen;
/* A filename cannot end in '.' or we treat it like it has none */
/*
* Case sensitive compare of two vfat names.
*/
-static int vfat_cmp(const struct dentry *parent, const struct dentry *dentry,
+static int vfat_cmp(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
unsigned int alen, blen;
extern int hfs_hash_dentry(const struct dentry *, struct qstr *);
extern int hfs_strcmp(const unsigned char *, unsigned int,
const unsigned char *, unsigned int);
-extern int hfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+extern int hfs_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
/* trans.c */
* Test for equality of two strings in the HFS filename character ordering.
* return 1 on failure and 0 on success
*/
-int hfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+int hfs_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
const unsigned char *n1, *n2;
int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
int max_unistr_len, const char *astr, int len);
int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str);
-int hfsplus_compare_dentry(const struct dentry *parent,
- const struct dentry *dentry, unsigned int len,
+int hfsplus_compare_dentry(const struct dentry *dentry, unsigned int len,
const char *str, const struct qstr *name);
/* wrapper.c */
* Composed unicode characters are decomposed and case-folding is performed
* if the appropriate bits are (un)set on the superblock.
*/
-int hfsplus_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+int hfsplus_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
- struct super_block *sb = parent->d_sb;
+ struct super_block *sb = dentry->d_sb;
int casefold, decompose, size;
int dsize1, dsize2, len1, len2;
const u16 *dstr1, *dstr2;
return 0;
}
-static int hpfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+static int hpfs_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
unsigned al = len;
if (hpfs_chk_name(name->name, &bl))
return 1;
- if (hpfs_compare_names(parent->d_sb, str, al, name->name, bl, 0))
+ if (hpfs_compare_names(dentry->d_sb, str, al, name->name, bl, 0))
return 1;
return 0;
}
mask |= ATTR_KILL_PRIV;
return mask;
}
-EXPORT_SYMBOL(dentry_needs_remove_privs);
static int __remove_privs(struct dentry *dentry, int kill)
{
*/
int file_remove_privs(struct file *file)
{
- struct dentry *dentry = file->f_path.dentry;
- struct inode *inode = d_inode(dentry);
+ struct dentry *dentry = file_dentry(file);
+ struct inode *inode = file_inode(file);
int kill;
int error = 0;
if (IS_NOSEC(inode))
return 0;
- kill = file_needs_remove_privs(file);
+ kill = dentry_needs_remove_privs(dentry);
if (kill < 0)
return kill;
if (kill)
*/
extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
extern void inode_add_lru(struct inode *inode);
+extern int dentry_needs_remove_privs(struct dentry *dentry);
/*
* fs-writeback.c
#define BEQUIET
static int isofs_hashi(const struct dentry *parent, struct qstr *qstr);
-static int isofs_dentry_cmpi(const struct dentry *parent,
- const struct dentry *dentry,
+static int isofs_dentry_cmpi(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
#ifdef CONFIG_JOLIET
static int isofs_hashi_ms(const struct dentry *parent, struct qstr *qstr);
static int isofs_hash_ms(const struct dentry *parent, struct qstr *qstr);
-static int isofs_dentry_cmpi_ms(const struct dentry *parent,
- const struct dentry *dentry,
+static int isofs_dentry_cmpi_ms(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
-static int isofs_dentry_cmp_ms(const struct dentry *parent,
- const struct dentry *dentry,
+static int isofs_dentry_cmp_ms(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
#endif
}
static int
-isofs_dentry_cmpi(const struct dentry *parent, const struct dentry *dentry,
+isofs_dentry_cmpi(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return isofs_dentry_cmp_common(len, str, name, 0, 1);
}
static int
-isofs_dentry_cmp_ms(const struct dentry *parent, const struct dentry *dentry,
+isofs_dentry_cmp_ms(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return isofs_dentry_cmp_common(len, str, name, 1, 0);
}
static int
-isofs_dentry_cmpi_ms(const struct dentry *parent, const struct dentry *dentry,
+isofs_dentry_cmpi_ms(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return isofs_dentry_cmp_common(len, str, name, 1, 1);
qstr.len = dlen;
if (likely(!dentry->d_op))
return dentry->d_name.len != dlen || memcmp(dentry->d_name.name, compare, dlen);
- return dentry->d_op->d_compare(NULL, NULL, dentry->d_name.len, dentry->d_name.name, &qstr);
+ return dentry->d_op->d_compare(NULL, dentry->d_name.len, dentry->d_name.name, &qstr);
}
/*
return 0;
}
-static int jfs_ci_compare(const struct dentry *parent, const struct dentry *dentry,
+static int jfs_ci_compare(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
int i, result = 1;
*/
static int ncp_lookup_validate(struct dentry *, unsigned int);
static int ncp_hash_dentry(const struct dentry *, struct qstr *);
-static int ncp_compare_dentry(const struct dentry *, const struct dentry *,
+static int ncp_compare_dentry(const struct dentry *,
unsigned int, const char *, const struct qstr *);
static int ncp_delete_dentry(const struct dentry *);
static void ncp_d_prune(struct dentry *dentry);
* the callers will handle races.
*/
static int
-ncp_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+ncp_compare_dentry(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
struct inode *pinode;
if (len != name->len)
return 1;
- pinode = d_inode_rcu(parent);
+ pinode = d_inode_rcu(dentry->d_parent);
if (!pinode)
return 1;
return res;
}
-static int proc_sys_compare(const struct dentry *parent, const struct dentry *dentry,
+static int proc_sys_compare(const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
struct ctl_table_header *head;
int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_weak_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, struct qstr *);
- int (*d_compare)(const struct dentry *, const struct dentry *,
+ int (*d_compare)(const struct dentry *,
unsigned int, const char *, const struct qstr *);
int (*d_delete)(const struct dentry *);
int (*d_init)(struct dentry *);
extern void free_inode_nonrcu(struct inode *inode);
extern int should_remove_suid(struct dentry *);
extern int file_remove_privs(struct file *);
-extern int dentry_needs_remove_privs(struct dentry *dentry);
-static inline int file_needs_remove_privs(struct file *file)
-{
- return dentry_needs_remove_privs(file->f_path.dentry);
-}
extern void __insert_inode_hash(struct inode *, unsigned long hashval);
static inline void insert_inode_hash(struct inode *inode)