![Christoph Hellwig](/assets/img/avatar_default.png)
Replace inode_setattr with opencoded variants of it in all callers. This moves the remaining call to vmtruncate into the filesystem methods where it can be replaced with the proper truncate sequence. In a few cases it was obvious that we would never end up calling vmtruncate so it was left out in the opencoded variant: spufs: explicitly checks for ATTR_SIZE earlier btrfs,hugetlbfs,logfs,dlmfs: explicitly clears ATTR_SIZE earlier ufs: contains an opencoded simple_seattr + truncate that sets the filesize just above In addition to that ncpfs called inode_setattr with handcrafted iattrs, which allowed to trim down the opencoded variant. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
415 lines
10 KiB
C
415 lines
10 KiB
C
/*
|
|
* linux/fs/affs/inode.c
|
|
*
|
|
* (c) 1996 Hans-Joachim Widmaier - Rewritten
|
|
*
|
|
* (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
|
|
*
|
|
* (C) 1992 Eric Youngdale Modified for ISO9660 filesystem.
|
|
*
|
|
* (C) 1991 Linus Torvalds - minix filesystem
|
|
*/
|
|
#include <linux/sched.h>
|
|
#include <linux/gfp.h>
|
|
#include "affs.h"
|
|
|
|
extern const struct inode_operations affs_symlink_inode_operations;
|
|
extern struct timezone sys_tz;
|
|
|
|
struct inode *affs_iget(struct super_block *sb, unsigned long ino)
|
|
{
|
|
struct affs_sb_info *sbi = AFFS_SB(sb);
|
|
struct buffer_head *bh;
|
|
struct affs_head *head;
|
|
struct affs_tail *tail;
|
|
struct inode *inode;
|
|
u32 block;
|
|
u32 size;
|
|
u32 prot;
|
|
u16 id;
|
|
|
|
inode = iget_locked(sb, ino);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
|
|
pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino);
|
|
|
|
block = inode->i_ino;
|
|
bh = affs_bread(sb, block);
|
|
if (!bh) {
|
|
affs_warning(sb, "read_inode", "Cannot read block %d", block);
|
|
goto bad_inode;
|
|
}
|
|
if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
|
|
affs_warning(sb,"read_inode",
|
|
"Checksum or type (ptype=%d) error on inode %d",
|
|
AFFS_HEAD(bh)->ptype, block);
|
|
goto bad_inode;
|
|
}
|
|
|
|
head = AFFS_HEAD(bh);
|
|
tail = AFFS_TAIL(sb, bh);
|
|
prot = be32_to_cpu(tail->protect);
|
|
|
|
inode->i_size = 0;
|
|
inode->i_nlink = 1;
|
|
inode->i_mode = 0;
|
|
AFFS_I(inode)->i_extcnt = 1;
|
|
AFFS_I(inode)->i_ext_last = ~1;
|
|
AFFS_I(inode)->i_protect = prot;
|
|
atomic_set(&AFFS_I(inode)->i_opencnt, 0);
|
|
AFFS_I(inode)->i_blkcnt = 0;
|
|
AFFS_I(inode)->i_lc = NULL;
|
|
AFFS_I(inode)->i_lc_size = 0;
|
|
AFFS_I(inode)->i_lc_shift = 0;
|
|
AFFS_I(inode)->i_lc_mask = 0;
|
|
AFFS_I(inode)->i_ac = NULL;
|
|
AFFS_I(inode)->i_ext_bh = NULL;
|
|
AFFS_I(inode)->mmu_private = 0;
|
|
AFFS_I(inode)->i_lastalloc = 0;
|
|
AFFS_I(inode)->i_pa_cnt = 0;
|
|
|
|
if (sbi->s_flags & SF_SETMODE)
|
|
inode->i_mode = sbi->s_mode;
|
|
else
|
|
inode->i_mode = prot_to_mode(prot);
|
|
|
|
id = be16_to_cpu(tail->uid);
|
|
if (id == 0 || sbi->s_flags & SF_SETUID)
|
|
inode->i_uid = sbi->s_uid;
|
|
else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
|
|
inode->i_uid = 0;
|
|
else
|
|
inode->i_uid = id;
|
|
|
|
id = be16_to_cpu(tail->gid);
|
|
if (id == 0 || sbi->s_flags & SF_SETGID)
|
|
inode->i_gid = sbi->s_gid;
|
|
else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
|
|
inode->i_gid = 0;
|
|
else
|
|
inode->i_gid = id;
|
|
|
|
switch (be32_to_cpu(tail->stype)) {
|
|
case ST_ROOT:
|
|
inode->i_uid = sbi->s_uid;
|
|
inode->i_gid = sbi->s_gid;
|
|
/* fall through */
|
|
case ST_USERDIR:
|
|
if (be32_to_cpu(tail->stype) == ST_USERDIR ||
|
|
sbi->s_flags & SF_SETMODE) {
|
|
if (inode->i_mode & S_IRUSR)
|
|
inode->i_mode |= S_IXUSR;
|
|
if (inode->i_mode & S_IRGRP)
|
|
inode->i_mode |= S_IXGRP;
|
|
if (inode->i_mode & S_IROTH)
|
|
inode->i_mode |= S_IXOTH;
|
|
inode->i_mode |= S_IFDIR;
|
|
} else
|
|
inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
|
|
/* Maybe it should be controlled by mount parameter? */
|
|
//inode->i_mode |= S_ISVTX;
|
|
inode->i_op = &affs_dir_inode_operations;
|
|
inode->i_fop = &affs_dir_operations;
|
|
break;
|
|
case ST_LINKDIR:
|
|
#if 0
|
|
affs_warning(sb, "read_inode", "inode is LINKDIR");
|
|
goto bad_inode;
|
|
#else
|
|
inode->i_mode |= S_IFDIR;
|
|
/* ... and leave ->i_op and ->i_fop pointing to empty */
|
|
break;
|
|
#endif
|
|
case ST_LINKFILE:
|
|
affs_warning(sb, "read_inode", "inode is LINKFILE");
|
|
goto bad_inode;
|
|
case ST_FILE:
|
|
size = be32_to_cpu(tail->size);
|
|
inode->i_mode |= S_IFREG;
|
|
AFFS_I(inode)->mmu_private = inode->i_size = size;
|
|
if (inode->i_size) {
|
|
AFFS_I(inode)->i_blkcnt = (size - 1) /
|
|
sbi->s_data_blksize + 1;
|
|
AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
|
|
sbi->s_hashsize + 1;
|
|
}
|
|
if (tail->link_chain)
|
|
inode->i_nlink = 2;
|
|
inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
|
|
inode->i_op = &affs_file_inode_operations;
|
|
inode->i_fop = &affs_file_operations;
|
|
break;
|
|
case ST_SOFTLINK:
|
|
inode->i_mode |= S_IFLNK;
|
|
inode->i_op = &affs_symlink_inode_operations;
|
|
inode->i_data.a_ops = &affs_symlink_aops;
|
|
break;
|
|
}
|
|
|
|
inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
|
|
= (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
|
|
be32_to_cpu(tail->change.mins) * 60 +
|
|
be32_to_cpu(tail->change.ticks) / 50 +
|
|
((8 * 365 + 2) * 24 * 60 * 60)) +
|
|
sys_tz.tz_minuteswest * 60;
|
|
inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
|
|
affs_brelse(bh);
|
|
unlock_new_inode(inode);
|
|
return inode;
|
|
|
|
bad_inode:
|
|
affs_brelse(bh);
|
|
iget_failed(inode);
|
|
return ERR_PTR(-EIO);
|
|
}
|
|
|
|
int
|
|
affs_write_inode(struct inode *inode, struct writeback_control *wbc)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct buffer_head *bh;
|
|
struct affs_tail *tail;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
|
|
pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino);
|
|
|
|
if (!inode->i_nlink)
|
|
// possibly free block
|
|
return 0;
|
|
bh = affs_bread(sb, inode->i_ino);
|
|
if (!bh) {
|
|
affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
|
|
return -EIO;
|
|
}
|
|
tail = AFFS_TAIL(sb, bh);
|
|
if (tail->stype == cpu_to_be32(ST_ROOT)) {
|
|
secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
|
|
} else {
|
|
tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
|
|
tail->size = cpu_to_be32(inode->i_size);
|
|
secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
|
|
if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
|
|
uid = inode->i_uid;
|
|
gid = inode->i_gid;
|
|
if (AFFS_SB(sb)->s_flags & SF_MUFS) {
|
|
if (inode->i_uid == 0 || inode->i_uid == 0xFFFF)
|
|
uid = inode->i_uid ^ ~0;
|
|
if (inode->i_gid == 0 || inode->i_gid == 0xFFFF)
|
|
gid = inode->i_gid ^ ~0;
|
|
}
|
|
if (!(AFFS_SB(sb)->s_flags & SF_SETUID))
|
|
tail->uid = cpu_to_be16(uid);
|
|
if (!(AFFS_SB(sb)->s_flags & SF_SETGID))
|
|
tail->gid = cpu_to_be16(gid);
|
|
}
|
|
}
|
|
affs_fix_checksum(sb, bh);
|
|
mark_buffer_dirty_inode(bh, inode);
|
|
affs_brelse(bh);
|
|
affs_free_prealloc(inode);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
affs_notify_change(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
int error;
|
|
|
|
pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid);
|
|
|
|
error = inode_change_ok(inode,attr);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) ||
|
|
((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) ||
|
|
((attr->ia_valid & ATTR_MODE) &&
|
|
(AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE | SF_IMMUTABLE)))) {
|
|
if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET))
|
|
error = -EPERM;
|
|
goto out;
|
|
}
|
|
|
|
if ((attr->ia_valid & ATTR_SIZE) &&
|
|
attr->ia_size != i_size_read(inode)) {
|
|
error = vmtruncate(inode, attr->ia_size);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
setattr_copy(inode, attr);
|
|
mark_inode_dirty(inode);
|
|
|
|
if (attr->ia_valid & ATTR_MODE)
|
|
mode_to_prot(inode);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
void
|
|
affs_delete_inode(struct inode *inode)
|
|
{
|
|
pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
|
|
truncate_inode_pages(&inode->i_data, 0);
|
|
inode->i_size = 0;
|
|
affs_truncate(inode);
|
|
clear_inode(inode);
|
|
affs_free_block(inode->i_sb, inode->i_ino);
|
|
}
|
|
|
|
void
|
|
affs_clear_inode(struct inode *inode)
|
|
{
|
|
unsigned long cache_page;
|
|
|
|
pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
|
|
|
|
affs_free_prealloc(inode);
|
|
cache_page = (unsigned long)AFFS_I(inode)->i_lc;
|
|
if (cache_page) {
|
|
pr_debug("AFFS: freeing ext cache\n");
|
|
AFFS_I(inode)->i_lc = NULL;
|
|
AFFS_I(inode)->i_ac = NULL;
|
|
free_page(cache_page);
|
|
}
|
|
affs_brelse(AFFS_I(inode)->i_ext_bh);
|
|
AFFS_I(inode)->i_ext_last = ~1;
|
|
AFFS_I(inode)->i_ext_bh = NULL;
|
|
}
|
|
|
|
struct inode *
|
|
affs_new_inode(struct inode *dir)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct inode *inode;
|
|
u32 block;
|
|
struct buffer_head *bh;
|
|
|
|
if (!(inode = new_inode(sb)))
|
|
goto err_inode;
|
|
|
|
if (!(block = affs_alloc_block(dir, dir->i_ino)))
|
|
goto err_block;
|
|
|
|
bh = affs_getzeroblk(sb, block);
|
|
if (!bh)
|
|
goto err_bh;
|
|
mark_buffer_dirty_inode(bh, inode);
|
|
affs_brelse(bh);
|
|
|
|
inode->i_uid = current_fsuid();
|
|
inode->i_gid = current_fsgid();
|
|
inode->i_ino = block;
|
|
inode->i_nlink = 1;
|
|
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
|
|
atomic_set(&AFFS_I(inode)->i_opencnt, 0);
|
|
AFFS_I(inode)->i_blkcnt = 0;
|
|
AFFS_I(inode)->i_lc = NULL;
|
|
AFFS_I(inode)->i_lc_size = 0;
|
|
AFFS_I(inode)->i_lc_shift = 0;
|
|
AFFS_I(inode)->i_lc_mask = 0;
|
|
AFFS_I(inode)->i_ac = NULL;
|
|
AFFS_I(inode)->i_ext_bh = NULL;
|
|
AFFS_I(inode)->mmu_private = 0;
|
|
AFFS_I(inode)->i_protect = 0;
|
|
AFFS_I(inode)->i_lastalloc = 0;
|
|
AFFS_I(inode)->i_pa_cnt = 0;
|
|
AFFS_I(inode)->i_extcnt = 1;
|
|
AFFS_I(inode)->i_ext_last = ~1;
|
|
|
|
insert_inode_hash(inode);
|
|
|
|
return inode;
|
|
|
|
err_bh:
|
|
affs_free_block(sb, block);
|
|
err_block:
|
|
iput(inode);
|
|
err_inode:
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Add an entry to a directory. Create the header block
|
|
* and insert it into the hash table.
|
|
*/
|
|
|
|
int
|
|
affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct buffer_head *inode_bh = NULL;
|
|
struct buffer_head *bh = NULL;
|
|
u32 block = 0;
|
|
int retval;
|
|
|
|
pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
|
|
(u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);
|
|
|
|
retval = -EIO;
|
|
bh = affs_bread(sb, inode->i_ino);
|
|
if (!bh)
|
|
goto done;
|
|
|
|
affs_lock_link(inode);
|
|
switch (type) {
|
|
case ST_LINKFILE:
|
|
case ST_LINKDIR:
|
|
retval = -ENOSPC;
|
|
block = affs_alloc_block(dir, dir->i_ino);
|
|
if (!block)
|
|
goto err;
|
|
retval = -EIO;
|
|
inode_bh = bh;
|
|
bh = affs_getzeroblk(sb, block);
|
|
if (!bh)
|
|
goto err;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
|
|
AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
|
|
affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
|
|
AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
|
|
AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
|
|
|
|
if (inode_bh) {
|
|
__be32 chain;
|
|
chain = AFFS_TAIL(sb, inode_bh)->link_chain;
|
|
AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
|
|
AFFS_TAIL(sb, bh)->link_chain = chain;
|
|
AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
|
|
affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
|
|
mark_buffer_dirty_inode(inode_bh, inode);
|
|
inode->i_nlink = 2;
|
|
atomic_inc(&inode->i_count);
|
|
}
|
|
affs_fix_checksum(sb, bh);
|
|
mark_buffer_dirty_inode(bh, inode);
|
|
dentry->d_fsdata = (void *)(long)bh->b_blocknr;
|
|
|
|
affs_lock_dir(dir);
|
|
retval = affs_insert_hash(dir, bh);
|
|
mark_buffer_dirty_inode(bh, inode);
|
|
affs_unlock_dir(dir);
|
|
affs_unlock_link(inode);
|
|
|
|
d_instantiate(dentry, inode);
|
|
done:
|
|
affs_brelse(inode_bh);
|
|
affs_brelse(bh);
|
|
return retval;
|
|
err:
|
|
if (block)
|
|
affs_free_block(sb, block);
|
|
affs_unlock_link(inode);
|
|
goto done;
|
|
}
|