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get rid of 'parent' argument of ->d_compare()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-07-31 16:37:25 -04:00
parent d3fe19852e
commit 6fa67e7075
22 changed files with 40 additions and 38 deletions
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2
Documentation/filesystems/Locking
View File

@ -12,7 +12,7 @@ prototypes:
int (*d_revalidate)(struct dentry *, unsigned int); int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_weak_revalidate)(struct dentry *, unsigned int); int (*d_weak_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, struct qstr *); 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 *); unsigned int, const char *, const struct qstr *);
int (*d_delete)(struct dentry *); int (*d_delete)(struct dentry *);
int (*d_init)(struct dentry *); int (*d_init)(struct dentry *);

7
Documentation/filesystems/porting
View File

@ -585,3 +585,10 @@ in your dentry operations instead.
in the instances. Rationale: !@#!@# security_d_instantiate() needs to be in the instances. Rationale: !@#!@# security_d_instantiate() needs to be
called before we attach dentry to inode and !@#!@##!@$!$#!@#$!@$!@$ smack called before we attach dentry to inode and !@#!@##!@$!$#!@#$!@$!@$ smack
->d_instantiate() uses not just ->getxattr() but ->setxattr() as well. ->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.

2
Documentation/filesystems/vfs.txt
View File

@ -931,7 +931,7 @@ struct dentry_operations {
int (*d_revalidate)(struct dentry *, unsigned int); int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_weak_revalidate)(struct dentry *, unsigned int); int (*d_weak_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, struct qstr *); 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 *); unsigned int, const char *, const struct qstr *);
int (*d_delete)(const struct dentry *); int (*d_delete)(const struct dentry *);
int (*d_init)(struct dentry *); int (*d_init)(struct dentry *);

2
drivers/staging/lustre/lustre/llite/dcache.c
View File

@ -78,7 +78,7 @@ static void ll_release(struct dentry *de)
* INVALID) so d_lookup() matches it, but we have no lock on it (so * INVALID) so d_lookup() matches it, but we have no lock on it (so
* lock_match() fails) and we spin around real_lookup(). * 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, unsigned int len, const char *str,
const struct qstr *name) const struct qstr *name)
{ {

2
fs/adfs/dir.c
View File

@ -227,7 +227,7 @@ adfs_hash(const struct dentry *parent, struct qstr *qstr)
* requirements of the underlying filesystem. * requirements of the underlying filesystem.
*/ */
static int 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) unsigned int len, const char *str, const struct qstr *name)
{ {
int i; int i;

8
fs/affs/namei.c
View File

@ -14,11 +14,11 @@ typedef int (*toupper_t)(int);
static int affs_toupper(int ch); static int affs_toupper(int ch);
static int affs_hash_dentry(const struct dentry *, struct qstr *); 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); unsigned int len, const char *str, const struct qstr *name);
static int affs_intl_toupper(int ch); static int affs_intl_toupper(int ch);
static int affs_intl_hash_dentry(const struct dentry *, struct qstr *); 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); unsigned int len, const char *str, const struct qstr *name);
const struct dentry_operations affs_dentry_operations = { const struct dentry_operations affs_dentry_operations = {
@ -131,7 +131,7 @@ static inline int __affs_compare_dentry(unsigned int len,
} }
static int 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) unsigned int len, const char *str, const struct qstr *name)
{ {
@ -140,7 +140,7 @@ affs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
} }
static int 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) unsigned int len, const char *str, const struct qstr *name)
{ {
return __affs_compare_dentry(len, str, name, affs_intl_toupper, return __affs_compare_dentry(len, str, name, affs_intl_toupper,

2
fs/cifs/dir.c
View File

@ -903,7 +903,7 @@ static int cifs_ci_hash(const struct dentry *dentry, struct qstr *q)
return 0; 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) unsigned int len, const char *str, const struct qstr *name)
{ {
struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;

4
fs/dcache.c
View File

@ -2047,7 +2047,7 @@ static inline bool d_same_name(const struct dentry *dentry,
return false; return false;
return dentry_cmp(dentry, name->name, name->len) == 0; 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, dentry->d_name.len, dentry->d_name.name,
name) == 0; name) == 0;
} }
@ -2150,7 +2150,7 @@ struct dentry *__d_lookup_rcu(const struct dentry *parent,
cpu_relax(); cpu_relax();
goto seqretry; goto seqretry;
} }
if (parent->d_op->d_compare(parent, dentry, if (parent->d_op->d_compare(dentry,
tlen, tname, name) != 0) tlen, tname, name) != 0)
continue; continue;
} else { } else {

3
fs/efivarfs/super.c
View File

@ -45,8 +45,7 @@ static struct super_block *efivarfs_sb;
* So we need to perform a case-sensitive match on part 1 and a * So we need to perform a case-sensitive match on part 1 and a
* case-insensitive match on part 2. * case-insensitive match on part 2.
*/ */
static int efivarfs_d_compare(const struct dentry *parent, static int efivarfs_d_compare(const struct dentry *dentry,
const struct dentry *dentry,
unsigned int len, const char *str, unsigned int len, const char *str,
const struct qstr *name) const struct qstr *name)
{ {

2
fs/fat/namei_msdos.c
View File

@ -162,7 +162,7 @@ static int msdos_hash(const struct dentry *dentry, struct qstr *qstr)
* Compare two msdos names. If either of the names are invalid, * Compare two msdos names. If either of the names are invalid,
* we fall back to doing the standard name comparison. * 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) unsigned int len, const char *str, const struct qstr *name)
{ {
struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options; struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options;

4
fs/fat/namei_vfat.c
View File

@ -138,7 +138,7 @@ static int vfat_hashi(const struct dentry *dentry, struct qstr *qstr)
/* /*
* Case insensitive compare of two vfat names. * 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) unsigned int len, const char *str, const struct qstr *name)
{ {
struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io; struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
@ -157,7 +157,7 @@ static int vfat_cmpi(const struct dentry *parent, const struct dentry *dentry,
/* /*
* Case sensitive compare of two vfat names. * 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 len, const char *str, const struct qstr *name)
{ {
unsigned int alen, blen; unsigned int alen, blen;

2
fs/hfs/hfs_fs.h
View File

@ -233,7 +233,7 @@ extern const struct dentry_operations hfs_dentry_operations;
extern int hfs_hash_dentry(const struct dentry *, struct qstr *); extern int hfs_hash_dentry(const struct dentry *, struct qstr *);
extern int hfs_strcmp(const unsigned char *, unsigned int, extern int hfs_strcmp(const unsigned char *, unsigned int,
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); unsigned int len, const char *str, const struct qstr *name);
/* trans.c */ /* trans.c */

2
fs/hfs/string.c
View File

@ -92,7 +92,7 @@ int hfs_strcmp(const unsigned char *s1, unsigned int len1,
* Test for equality of two strings in the HFS filename character ordering. * Test for equality of two strings in the HFS filename character ordering.
* return 1 on failure and 0 on success * 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) unsigned int len, const char *str, const struct qstr *name)
{ {
const unsigned char *n1, *n2; const unsigned char *n1, *n2;

3
fs/hfsplus/hfsplus_fs.h
View File

@ -520,8 +520,7 @@ int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr,
int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr, int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
int max_unistr_len, const char *astr, int len); int max_unistr_len, const char *astr, int len);
int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str); int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str);
int hfsplus_compare_dentry(const struct dentry *parent, int hfsplus_compare_dentry(const struct dentry *dentry, unsigned int len,
const struct dentry *dentry, unsigned int len,
const char *str, const struct qstr *name); const char *str, const struct qstr *name);
/* wrapper.c */ /* wrapper.c */

2
fs/hfsplus/unicode.c
View File

@ -385,7 +385,7 @@ int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str)
* Composed unicode characters are decomposed and case-folding is performed * Composed unicode characters are decomposed and case-folding is performed
* if the appropriate bits are (un)set on the superblock. * 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) unsigned int len, const char *str, const struct qstr *name)
{ {
struct super_block *sb = dentry->d_sb; struct super_block *sb = dentry->d_sb;

2
fs/hpfs/dentry.c
View File

@ -34,7 +34,7 @@ static int hpfs_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
return 0; 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 int len, const char *str, const struct qstr *name)
{ {
unsigned al = len; unsigned al = len;

15
fs/isofs/inode.c
View File

@ -29,18 +29,15 @@
#define BEQUIET #define BEQUIET
static int isofs_hashi(const struct dentry *parent, struct qstr *qstr); static int isofs_hashi(const struct dentry *parent, struct qstr *qstr);
static int isofs_dentry_cmpi(const struct dentry *parent, static int isofs_dentry_cmpi(const struct dentry *dentry,
const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name); unsigned int len, const char *str, const struct qstr *name);
#ifdef CONFIG_JOLIET #ifdef CONFIG_JOLIET
static int isofs_hashi_ms(const struct dentry *parent, struct qstr *qstr); 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_hash_ms(const struct dentry *parent, struct qstr *qstr);
static int isofs_dentry_cmpi_ms(const struct dentry *parent, static int isofs_dentry_cmpi_ms(const struct dentry *dentry,
const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name); unsigned int len, const char *str, const struct qstr *name);
static int isofs_dentry_cmp_ms(const struct dentry *parent, static int isofs_dentry_cmp_ms(const struct dentry *dentry,
const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name); unsigned int len, const char *str, const struct qstr *name);
#endif #endif
@ -235,7 +232,7 @@ isofs_hashi(const struct dentry *dentry, struct qstr *qstr)
} }
static int 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) unsigned int len, const char *str, const struct qstr *name)
{ {
return isofs_dentry_cmp_common(len, str, name, 0, 1); return isofs_dentry_cmp_common(len, str, name, 0, 1);
@ -276,14 +273,14 @@ isofs_hashi_ms(const struct dentry *dentry, struct qstr *qstr)
} }
static int 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) unsigned int len, const char *str, const struct qstr *name)
{ {
return isofs_dentry_cmp_common(len, str, name, 1, 0); return isofs_dentry_cmp_common(len, str, name, 1, 0);
} }
static int 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) unsigned int len, const char *str, const struct qstr *name)
{ {
return isofs_dentry_cmp_common(len, str, name, 1, 1); return isofs_dentry_cmp_common(len, str, name, 1, 1);

2
fs/isofs/namei.c
View File

@ -22,7 +22,7 @@ isofs_cmp(struct dentry *dentry, const char *compare, int dlen)
qstr.len = dlen; qstr.len = dlen;
if (likely(!dentry->d_op)) if (likely(!dentry->d_op))
return dentry->d_name.len != dlen || memcmp(dentry->d_name.name, compare, dlen); 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);
} }
/* /*

2
fs/jfs/namei.c
View File

@ -1572,7 +1572,7 @@ static int jfs_ci_hash(const struct dentry *dir, struct qstr *this)
return 0; 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) unsigned int len, const char *str, const struct qstr *name)
{ {
int i, result = 1; int i, result = 1;

6
fs/ncpfs/dir.c
View File

@ -74,7 +74,7 @@ const struct inode_operations ncp_dir_inode_operations =
*/ */
static int ncp_lookup_validate(struct dentry *, unsigned int); static int ncp_lookup_validate(struct dentry *, unsigned int);
static int ncp_hash_dentry(const struct dentry *, struct qstr *); 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 *); unsigned int, const char *, const struct qstr *);
static int ncp_delete_dentry(const struct dentry *); static int ncp_delete_dentry(const struct dentry *);
static void ncp_d_prune(struct dentry *dentry); static void ncp_d_prune(struct dentry *dentry);
@ -154,7 +154,7 @@ ncp_hash_dentry(const struct dentry *dentry, struct qstr *this)
* the callers will handle races. * the callers will handle races.
*/ */
static int 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) unsigned int len, const char *str, const struct qstr *name)
{ {
struct inode *pinode; struct inode *pinode;
@ -162,7 +162,7 @@ ncp_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
if (len != name->len) if (len != name->len)
return 1; return 1;
pinode = d_inode_rcu(parent); pinode = d_inode_rcu(dentry->d_parent);
if (!pinode) if (!pinode)
return 1; return 1;

2
fs/proc/proc_sysctl.c
View File

@ -834,7 +834,7 @@ static int sysctl_is_seen(struct ctl_table_header *p)
return res; 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) unsigned int len, const char *str, const struct qstr *name)
{ {
struct ctl_table_header *head; struct ctl_table_header *head;

2
include/linux/dcache.h
View File

@ -130,7 +130,7 @@ struct dentry_operations {
int (*d_revalidate)(struct dentry *, unsigned int); int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_weak_revalidate)(struct dentry *, unsigned int); int (*d_weak_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, struct qstr *); 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 *); unsigned int, const char *, const struct qstr *);
int (*d_delete)(const struct dentry *); int (*d_delete)(const struct dentry *);
int (*d_init)(struct dentry *); int (*d_init)(struct dentry *);