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sysv: bury the broken "quietly truncate the long filenames" logics

Browse source 
It's contrary to the normal semantics, only sysv and adfs try to
do that (on any other filesystem you'll get -ENAMETOOLONG instead
of quiet truncation) and nobody actually uses that - it got
accidentally broken 5 years ago and nobody noticed.  Time to
bury it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2019-04-02 09:42:50 -04:00
parent 357ab5b5d2
commit 1d8b29fdb7
3 changed files with 0 additions and 21 deletions
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15
fs/sysv/namei.c
View file

@ -28,21 +28,6 @@ static int add_nondir(struct dentry *dentry, struct inode *inode)
return err; return err;
} }
static int sysv_hash(const struct dentry *dentry, struct qstr *qstr)
{
/* Truncate the name in place, avoids having to define a compare
function. */
if (qstr->len > SYSV_NAMELEN) {
qstr->len = SYSV_NAMELEN;
qstr->hash = full_name_hash(dentry, qstr->name, qstr->len);
}
return 0;
}
const struct dentry_operations sysv_dentry_operations = {
.d_hash = sysv_hash,
};
static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags) static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
{ {
struct inode * inode = NULL; struct inode * inode = NULL;

3
fs/sysv/super.c
View file

@ -312,7 +312,6 @@ static int complete_read_super(struct super_block *sb, int silent, int size)
flavour_setup[sbi->s_type](sbi, &sb->s_max_links); flavour_setup[sbi->s_type](sbi, &sb->s_max_links);
sbi->s_truncate = 1;
sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone; sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone;
sbi->s_inodes_per_block = bsize >> 6; sbi->s_inodes_per_block = bsize >> 6;
sbi->s_inodes_per_block_1 = (bsize >> 6)-1; sbi->s_inodes_per_block_1 = (bsize >> 6)-1;
@ -334,8 +333,6 @@ static int complete_read_super(struct super_block *sb, int silent, int size)
sb->s_op = &sysv_sops; sb->s_op = &sysv_sops;
if (sbi->s_forced_ro) if (sbi->s_forced_ro)
sb->s_flags |= SB_RDONLY; sb->s_flags |= SB_RDONLY;
if (sbi->s_truncate)
sb->s_d_op = &sysv_dentry_operations;
root_inode = sysv_iget(sb, SYSV_ROOT_INO); root_inode = sysv_iget(sb, SYSV_ROOT_INO);
if (IS_ERR(root_inode)) { if (IS_ERR(root_inode)) {
printk("SysV FS: get root inode failed\n"); printk("SysV FS: get root inode failed\n");

3
fs/sysv/sysv.h
View file

@ -23,8 +23,6 @@ struct sysv_sb_info {
struct super_block *s_sb; /* VFS superblock */ struct super_block *s_sb; /* VFS superblock */
int s_type; /* file system type: FSTYPE_{XENIX|SYSV|COH} */ int s_type; /* file system type: FSTYPE_{XENIX|SYSV|COH} */
char s_bytesex; /* bytesex (le/be/pdp) */ char s_bytesex; /* bytesex (le/be/pdp) */
char s_truncate; /* if 1: names > SYSV_NAMELEN chars are truncated */
/* if 0: they are disallowed (ENAMETOOLONG) */
unsigned int s_inodes_per_block; /* number of inodes per block */ unsigned int s_inodes_per_block; /* number of inodes per block */
unsigned int s_inodes_per_block_1; /* inodes_per_block - 1 */ unsigned int s_inodes_per_block_1; /* inodes_per_block - 1 */
unsigned int s_inodes_per_block_bits; /* log2(inodes_per_block) */ unsigned int s_inodes_per_block_bits; /* log2(inodes_per_block) */
@ -166,7 +164,6 @@ extern const struct file_operations sysv_file_operations;
extern const struct file_operations sysv_dir_operations; extern const struct file_operations sysv_dir_operations;
extern const struct address_space_operations sysv_aops; extern const struct address_space_operations sysv_aops;
extern const struct super_operations sysv_sops; extern const struct super_operations sysv_sops;
extern const struct dentry_operations sysv_dentry_operations;
enum { enum {