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jffs2: use 64-bit intermediate timestamps 

The VFS now uses timespec64 timestamps consistently, but jffs2 still
converts them to 32-bit numbers on the storage medium. As the helper
functions for the conversion (get_seconds() and timespec_to_timespec64())
are now deprecated, let's change them over to the more modern
replacements.

This keeps the traditional interpretation of those values, where
the on-disk 32-bit numbers are taken to be negative numbers, i.e.
dates before 1970, on 32-bit machines, but future numbers past 2038
on 64-bit machines.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Arnd Bergmann 2018-07-13 16:47:16 +02:00 committed by Boris Brezillon
parent 39675caa06
commit c4592b9c37
4 changed files with 27 additions and 26 deletions
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32
fs/jffs2/dir.c
View File

@ -201,7 +201,7 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry,
if (ret)
goto fail;
dir_i->i_mtime = dir_i->i_ctime = timespec_to_timespec64(ITIME(je32_to_cpu(ri->ctime)));
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
jffs2_free_raw_inode(ri);
@ -227,14 +227,14 @@ static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(d_inode(dentry));
int ret;
uint32_t now = get_seconds();
uint32_t now = JFFS2_NOW();
ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
dentry->d_name.len, dead_f, now);
if (dead_f->inocache)
set_nlink(d_inode(dentry), dead_f->inocache->pino_nlink);
if (!ret)
dir_i->i_mtime = dir_i->i_ctime = timespec_to_timespec64(ITIME(now));
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
return ret;
}
/***********************************************************************/
@ -260,7 +260,7 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de
type = (d_inode(old_dentry)->i_mode & S_IFMT) >> 12;
if (!type) type = DT_REG;
now = get_seconds();
now = JFFS2_NOW();
ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
if (!ret) {
@ -268,7 +268,7 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de
set_nlink(d_inode(old_dentry), ++f->inocache->pino_nlink);
mutex_unlock(&f->sem);
d_instantiate(dentry, d_inode(old_dentry));
dir_i->i_mtime = dir_i->i_ctime = timespec_to_timespec64(ITIME(now));
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
ihold(d_inode(old_dentry));
}
return ret;
@ -400,7 +400,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->mctime = cpu_to_je32(JFFS2_NOW());
rd->nsize = namelen;
rd->type = DT_LNK;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
@ -418,7 +418,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = timespec_to_timespec64(ITIME(je32_to_cpu(rd->mctime)));
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
jffs2_free_raw_dirent(rd);
@ -543,7 +543,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, umode_t mode
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->mctime = cpu_to_je32(JFFS2_NOW());
rd->nsize = namelen;
rd->type = DT_DIR;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
@ -561,7 +561,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, umode_t mode
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = timespec_to_timespec64(ITIME(je32_to_cpu(rd->mctime)));
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
inc_nlink(dir_i);
jffs2_free_raw_dirent(rd);
@ -588,7 +588,7 @@ static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
struct jffs2_inode_info *f = JFFS2_INODE_INFO(d_inode(dentry));
struct jffs2_full_dirent *fd;
int ret;
uint32_t now = get_seconds();
uint32_t now = JFFS2_NOW();
for (fd = f->dents ; fd; fd = fd->next) {
if (fd->ino)
@ -598,7 +598,7 @@ static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
dentry->d_name.len, f, now);
if (!ret) {
dir_i->i_mtime = dir_i->i_ctime = timespec_to_timespec64(ITIME(now));
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
clear_nlink(d_inode(dentry));
drop_nlink(dir_i);
}
@ -712,7 +712,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, umode_t mode
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->mctime = cpu_to_je32(JFFS2_NOW());
rd->nsize = namelen;
/* XXX: This is ugly. */
@ -733,7 +733,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, umode_t mode
goto fail;
}
dir_i->i_mtime = dir_i->i_ctime = timespec_to_timespec64(ITIME(je32_to_cpu(rd->mctime)));
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
jffs2_free_raw_dirent(rd);
@ -797,7 +797,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
type = (d_inode(old_dentry)->i_mode & S_IFMT) >> 12;
if (!type) type = DT_REG;
now = get_seconds();
now = JFFS2_NOW();
ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i),
d_inode(old_dentry)->i_ino, type,
new_dentry->d_name.name, new_dentry->d_name.len, now);
@ -853,14 +853,14 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
* caller won't do it on its own since we are returning an error.
*/
d_invalidate(new_dentry);
new_dir_i->i_mtime = new_dir_i->i_ctime = timespec_to_timespec64(ITIME(now));
new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
return ret;
}
if (d_is_dir(old_dentry))
drop_nlink(old_dir_i);
new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = timespec_to_timespec64(ITIME(now));
new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);
return 0;
}

6
fs/jffs2/file.c
View File

@ -175,7 +175,7 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
ri.uid = cpu_to_je16(i_uid_read(inode));
ri.gid = cpu_to_je16(i_gid_read(inode));
ri.isize = cpu_to_je32(max((uint32_t)inode->i_size, pageofs));
ri.atime = ri.ctime = ri.mtime = cpu_to_je32(get_seconds());
ri.atime = ri.ctime = ri.mtime = cpu_to_je32(JFFS2_NOW());
ri.offset = cpu_to_je32(inode->i_size);
ri.dsize = cpu_to_je32(pageofs - inode->i_size);
ri.csize = cpu_to_je32(0);
@ -283,7 +283,7 @@ static int jffs2_write_end(struct file *filp, struct address_space *mapping,
ri->uid = cpu_to_je16(i_uid_read(inode));
ri->gid = cpu_to_je16(i_gid_read(inode));
ri->isize = cpu_to_je32((uint32_t)inode->i_size);
ri->atime = ri->ctime = ri->mtime = cpu_to_je32(get_seconds());
ri->atime = ri->ctime = ri->mtime = cpu_to_je32(JFFS2_NOW());
/* In 2.4, it was already kmapped by generic_file_write(). Doesn't
hurt to do it again. The alternative is ifdefs, which are ugly. */
@ -308,7 +308,7 @@ static int jffs2_write_end(struct file *filp, struct address_space *mapping,
inode->i_size = pos + writtenlen;
inode->i_blocks = (inode->i_size + 511) >> 9;
inode->i_ctime = inode->i_mtime = timespec_to_timespec64(ITIME(je32_to_cpu(ri->ctime)));
inode->i_ctime = inode->i_mtime = ITIME(je32_to_cpu(ri->ctime));
}
}

12
fs/jffs2/fs.c
View File

@ -146,9 +146,9 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
return PTR_ERR(new_metadata);
}
/* It worked. Update the inode */
inode->i_atime = timespec_to_timespec64(ITIME(je32_to_cpu(ri->atime)));
inode->i_ctime = timespec_to_timespec64(ITIME(je32_to_cpu(ri->ctime)));
inode->i_mtime = timespec_to_timespec64(ITIME(je32_to_cpu(ri->mtime)));
inode->i_atime = ITIME(je32_to_cpu(ri->atime));
inode->i_ctime = ITIME(je32_to_cpu(ri->ctime));
inode->i_mtime = ITIME(je32_to_cpu(ri->mtime));
inode->i_mode = jemode_to_cpu(ri->mode);
i_uid_write(inode, je16_to_cpu(ri->uid));
i_gid_write(inode, je16_to_cpu(ri->gid));
@ -280,9 +280,9 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
i_uid_write(inode, je16_to_cpu(latest_node.uid));
i_gid_write(inode, je16_to_cpu(latest_node.gid));
inode->i_size = je32_to_cpu(latest_node.isize);
inode->i_atime = timespec_to_timespec64(ITIME(je32_to_cpu(latest_node.atime)));
inode->i_mtime = timespec_to_timespec64(ITIME(je32_to_cpu(latest_node.mtime)));
inode->i_ctime = timespec_to_timespec64(ITIME(je32_to_cpu(latest_node.ctime)));
inode->i_atime = ITIME(je32_to_cpu(latest_node.atime));
inode->i_mtime = ITIME(je32_to_cpu(latest_node.mtime));
inode->i_ctime = ITIME(je32_to_cpu(latest_node.ctime));
set_nlink(inode, f->inocache->pino_nlink);

3
fs/jffs2/os-linux.h
View File

@ -31,7 +31,8 @@ struct kvec;
#define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f)))
#define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev)
#define ITIME(sec) ((struct timespec){sec, 0})
#define ITIME(sec) ((struct timespec64){(int32_t)sec, 0})
#define JFFS2_NOW() (ktime_get_real_seconds())
#define I_SEC(tv) ((tv).tv_sec)
#define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
#define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)