2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* linux/fs/sysv/namei.c
|
|
|
|
*
|
|
|
|
* minix/namei.c
|
|
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
|
|
*
|
|
|
|
* coh/namei.c
|
|
|
|
* Copyright (C) 1993 Pascal Haible, Bruno Haible
|
|
|
|
*
|
|
|
|
* sysv/namei.c
|
|
|
|
* Copyright (C) 1993 Bruno Haible
|
|
|
|
* Copyright (C) 1997, 1998 Krzysztof G. Baranowski
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/pagemap.h>
|
|
|
|
#include "sysv.h"
|
|
|
|
|
|
|
|
static int add_nondir(struct dentry *dentry, struct inode *inode)
|
|
|
|
{
|
|
|
|
int err = sysv_add_link(dentry, inode);
|
|
|
|
if (!err) {
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
return 0;
|
|
|
|
}
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_dec_link_count(inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
iput(inode);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2013-05-21 16:22:44 -06:00
|
|
|
static int sysv_hash(const struct dentry *dentry, struct qstr *qstr)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
/* Truncate the name in place, avoids having to define a compare
|
|
|
|
function. */
|
|
|
|
if (qstr->len > SYSV_NAMELEN) {
|
|
|
|
qstr->len = SYSV_NAMELEN;
|
2016-06-10 08:51:30 -06:00
|
|
|
qstr->hash = full_name_hash(dentry, qstr->name, qstr->len);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-19 22:55:13 -07:00
|
|
|
const struct dentry_operations sysv_dentry_operations = {
|
2005-04-16 16:20:36 -06:00
|
|
|
.d_hash = sysv_hash,
|
|
|
|
};
|
|
|
|
|
2012-06-10 15:13:09 -06:00
|
|
|
static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct inode * inode = NULL;
|
|
|
|
ino_t ino;
|
|
|
|
|
|
|
|
if (dentry->d_name.len > SYSV_NAMELEN)
|
|
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
ino = sysv_inode_by_name(dentry);
|
|
|
|
|
|
|
|
if (ino) {
|
2008-02-07 01:15:47 -07:00
|
|
|
inode = sysv_iget(dir->i_sb, ino);
|
|
|
|
if (IS_ERR(inode))
|
|
|
|
return ERR_CAST(inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
d_add(dentry, inode);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2011-07-25 23:52:52 -06:00
|
|
|
static int sysv_mknod(struct inode * dir, struct dentry * dentry, umode_t mode, dev_t rdev)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct inode * inode;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (!old_valid_dev(rdev))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
inode = sysv_new_inode(dir, mode);
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
|
|
|
|
if (!IS_ERR(inode)) {
|
|
|
|
sysv_set_inode(inode, rdev);
|
|
|
|
mark_inode_dirty(inode);
|
|
|
|
err = add_nondir(dentry, inode);
|
|
|
|
}
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2012-06-10 16:05:36 -06:00
|
|
|
static int sysv_create(struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
return sysv_mknod(dir, dentry, mode, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int sysv_symlink(struct inode * dir, struct dentry * dentry,
|
|
|
|
const char * symname)
|
|
|
|
{
|
|
|
|
int err = -ENAMETOOLONG;
|
|
|
|
int l = strlen(symname)+1;
|
|
|
|
struct inode * inode;
|
|
|
|
|
|
|
|
if (l > dir->i_sb->s_blocksize)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
inode = sysv_new_inode(dir, S_IFLNK|0777);
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
if (IS_ERR(inode))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
sysv_set_inode(inode, 0);
|
|
|
|
err = page_symlink(inode, symname, l);
|
|
|
|
if (err)
|
|
|
|
goto out_fail;
|
|
|
|
|
|
|
|
mark_inode_dirty(inode);
|
|
|
|
err = add_nondir(dentry, inode);
|
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
|
|
|
|
out_fail:
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_dec_link_count(inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
iput(inode);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int sysv_link(struct dentry * old_dentry, struct inode * dir,
|
|
|
|
struct dentry * dentry)
|
|
|
|
{
|
2015-03-17 16:25:59 -06:00
|
|
|
struct inode *inode = d_inode(old_dentry);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2016-09-14 08:48:05 -06:00
|
|
|
inode->i_ctime = current_time(inode);
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_inc_link_count(inode);
|
2010-10-23 09:11:40 -06:00
|
|
|
ihold(inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
return add_nondir(dentry, inode);
|
|
|
|
}
|
|
|
|
|
2011-07-25 23:41:39 -06:00
|
|
|
static int sysv_mkdir(struct inode * dir, struct dentry *dentry, umode_t mode)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct inode * inode;
|
2012-02-06 10:45:27 -07:00
|
|
|
int err;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_inc_link_count(dir);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
inode = sysv_new_inode(dir, S_IFDIR|mode);
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
if (IS_ERR(inode))
|
|
|
|
goto out_dir;
|
|
|
|
|
|
|
|
sysv_set_inode(inode, 0);
|
|
|
|
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_inc_link_count(inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
err = sysv_make_empty(inode, dir);
|
|
|
|
if (err)
|
|
|
|
goto out_fail;
|
|
|
|
|
|
|
|
err = sysv_add_link(dentry, inode);
|
|
|
|
if (err)
|
|
|
|
goto out_fail;
|
|
|
|
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
|
|
|
|
out_fail:
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_dec_link_count(inode);
|
|
|
|
inode_dec_link_count(inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
iput(inode);
|
|
|
|
out_dir:
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_dec_link_count(dir);
|
2005-04-16 16:20:36 -06:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int sysv_unlink(struct inode * dir, struct dentry * dentry)
|
|
|
|
{
|
2015-03-17 16:25:59 -06:00
|
|
|
struct inode * inode = d_inode(dentry);
|
2005-04-16 16:20:36 -06:00
|
|
|
struct page * page;
|
|
|
|
struct sysv_dir_entry * de;
|
|
|
|
int err = -ENOENT;
|
|
|
|
|
|
|
|
de = sysv_find_entry(dentry, &page);
|
|
|
|
if (!de)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
err = sysv_delete_entry (de, page);
|
|
|
|
if (err)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
inode->i_ctime = dir->i_ctime;
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_dec_link_count(inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int sysv_rmdir(struct inode * dir, struct dentry * dentry)
|
|
|
|
{
|
2015-03-17 16:25:59 -06:00
|
|
|
struct inode *inode = d_inode(dentry);
|
2005-04-16 16:20:36 -06:00
|
|
|
int err = -ENOTEMPTY;
|
|
|
|
|
|
|
|
if (sysv_empty_dir(inode)) {
|
|
|
|
err = sysv_unlink(dir, dentry);
|
|
|
|
if (!err) {
|
|
|
|
inode->i_size = 0;
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_dec_link_count(inode);
|
|
|
|
inode_dec_link_count(dir);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Anybody can rename anything with this: the permission checks are left to the
|
|
|
|
* higher-level routines.
|
|
|
|
*/
|
|
|
|
static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry,
|
fs: support RENAME_NOREPLACE for local filesystems
This is trivial to do:
- add flags argument to foo_rename()
- check if flags doesn't have any other than RENAME_NOREPLACE
- assign foo_rename() to .rename2 instead of .rename
Filesystems converted:
affs, bfs, exofs, ext2, hfs, hfsplus, jffs2, jfs, logfs, minix, msdos,
nilfs2, omfs, reiserfs, sysvfs, ubifs, udf, ufs, vfat.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Boaz Harrosh <ooo@electrozaur.com>
Acked-by: Richard Weinberger <richard@nod.at>
Acked-by: Bob Copeland <me@bobcopeland.com>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Dave Kleikamp <shaggy@kernel.org>
Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Christoph Hellwig <hch@infradead.org>
2016-09-27 03:03:57 -06:00
|
|
|
struct inode * new_dir, struct dentry * new_dentry,
|
|
|
|
unsigned int flags)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2015-03-17 16:25:59 -06:00
|
|
|
struct inode * old_inode = d_inode(old_dentry);
|
|
|
|
struct inode * new_inode = d_inode(new_dentry);
|
2005-04-16 16:20:36 -06:00
|
|
|
struct page * dir_page = NULL;
|
|
|
|
struct sysv_dir_entry * dir_de = NULL;
|
|
|
|
struct page * old_page;
|
|
|
|
struct sysv_dir_entry * old_de;
|
|
|
|
int err = -ENOENT;
|
|
|
|
|
fs: support RENAME_NOREPLACE for local filesystems
This is trivial to do:
- add flags argument to foo_rename()
- check if flags doesn't have any other than RENAME_NOREPLACE
- assign foo_rename() to .rename2 instead of .rename
Filesystems converted:
affs, bfs, exofs, ext2, hfs, hfsplus, jffs2, jfs, logfs, minix, msdos,
nilfs2, omfs, reiserfs, sysvfs, ubifs, udf, ufs, vfat.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Boaz Harrosh <ooo@electrozaur.com>
Acked-by: Richard Weinberger <richard@nod.at>
Acked-by: Bob Copeland <me@bobcopeland.com>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Dave Kleikamp <shaggy@kernel.org>
Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Christoph Hellwig <hch@infradead.org>
2016-09-27 03:03:57 -06:00
|
|
|
if (flags & ~RENAME_NOREPLACE)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
old_de = sysv_find_entry(old_dentry, &old_page);
|
|
|
|
if (!old_de)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (S_ISDIR(old_inode->i_mode)) {
|
|
|
|
err = -EIO;
|
|
|
|
dir_de = sysv_dotdot(old_inode, &dir_page);
|
|
|
|
if (!dir_de)
|
|
|
|
goto out_old;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (new_inode) {
|
|
|
|
struct page * new_page;
|
|
|
|
struct sysv_dir_entry * new_de;
|
|
|
|
|
|
|
|
err = -ENOTEMPTY;
|
|
|
|
if (dir_de && !sysv_empty_dir(new_inode))
|
|
|
|
goto out_dir;
|
|
|
|
|
|
|
|
err = -ENOENT;
|
|
|
|
new_de = sysv_find_entry(new_dentry, &new_page);
|
|
|
|
if (!new_de)
|
|
|
|
goto out_dir;
|
|
|
|
sysv_set_link(new_de, new_page, old_inode);
|
2016-09-14 08:48:05 -06:00
|
|
|
new_inode->i_ctime = current_time(new_inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (dir_de)
|
2006-10-01 00:29:03 -06:00
|
|
|
drop_nlink(new_inode);
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_dec_link_count(new_inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
} else {
|
|
|
|
err = sysv_add_link(new_dentry, old_inode);
|
2011-03-02 07:38:45 -07:00
|
|
|
if (err)
|
2005-04-16 16:20:36 -06:00
|
|
|
goto out_dir;
|
|
|
|
if (dir_de)
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_inc_link_count(new_dir);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
sysv_delete_entry(old_de, old_page);
|
2011-03-02 07:38:45 -07:00
|
|
|
mark_inode_dirty(old_inode);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (dir_de) {
|
|
|
|
sysv_set_link(dir_de, dir_page, new_dir);
|
2006-03-23 04:00:52 -07:00
|
|
|
inode_dec_link_count(old_dir);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_dir:
|
|
|
|
if (dir_de) {
|
|
|
|
kunmap(dir_page);
|
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.
Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.
Let's stop pretending that pages in page cache are special. They are
not.
The changes are pretty straight-forward:
- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.
The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.
There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.
virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT
@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE
@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK
@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)
@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)
@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-01 06:29:47 -06:00
|
|
|
put_page(dir_page);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
out_old:
|
|
|
|
kunmap(old_page);
|
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.
Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.
Let's stop pretending that pages in page cache are special. They are
not.
The changes are pretty straight-forward:
- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.
The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.
There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.
virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT
@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE
@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK
@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)
@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)
@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-01 06:29:47 -06:00
|
|
|
put_page(old_page);
|
2005-04-16 16:20:36 -06:00
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* directories can handle most operations...
|
|
|
|
*/
|
2007-02-12 01:55:40 -07:00
|
|
|
const struct inode_operations sysv_dir_inode_operations = {
|
2005-04-16 16:20:36 -06:00
|
|
|
.create = sysv_create,
|
|
|
|
.lookup = sysv_lookup,
|
|
|
|
.link = sysv_link,
|
|
|
|
.unlink = sysv_unlink,
|
|
|
|
.symlink = sysv_symlink,
|
|
|
|
.mkdir = sysv_mkdir,
|
|
|
|
.rmdir = sysv_rmdir,
|
|
|
|
.mknod = sysv_mknod,
|
|
|
|
.rename = sysv_rename,
|
|
|
|
.getattr = sysv_getattr,
|
|
|
|
};
|