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autofs: simplify parse_options() function call 

The parse_options() function uses a long list of parameters, most of
which are present in the super block info structure already.

The mount parameters set in parse_options() options don't require
cleanup so using the super block info struct directly is simpler.

Link: http://lkml.kernel.org/r/154296972423.9889.9368859245676473329.stgit@pluto-themaw-net
Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ian Kent 2019-01-03 15:27:36 -08:00 committed by Linus Torvalds
parent 55f0d8205d
commit 9bf964c9ce
1 changed files with 29 additions and 26 deletions
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55
fs/autofs/inode.c
View File

@ -124,21 +124,24 @@ static const match_table_t tokens = {
{Opt_err, NULL}
};
static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid,
int *pgrp, bool *pgrp_set, unsigned int *type,
int *minproto, int *maxproto)
static int parse_options(char *options,
struct inode *root, int *pgrp, bool *pgrp_set,
struct autofs_sb_info *sbi)
{
char *p;
substring_t args[MAX_OPT_ARGS];
int option;
int pipefd = -1;
kuid_t uid;
kgid_t gid;
*uid = current_uid();
*gid = current_gid();
root->i_uid = current_uid();
root->i_gid = current_gid();
*minproto = AUTOFS_MIN_PROTO_VERSION;
*maxproto = AUTOFS_MAX_PROTO_VERSION;
sbi->min_proto = AUTOFS_MIN_PROTO_VERSION;
sbi->max_proto = AUTOFS_MAX_PROTO_VERSION;
*pipefd = -1;
sbi->pipefd = -1;
if (!options)
return 1;
@ -152,22 +155,25 @@ static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid,
token = match_token(p, tokens, args);
switch (token) {
case Opt_fd:
if (match_int(args, pipefd))
if (match_int(args, &pipefd))
return 1;
sbi->pipefd = pipefd;
break;
case Opt_uid:
if (match_int(args, &option))
return 1;
*uid = make_kuid(current_user_ns(), option);
if (!uid_valid(*uid))
uid = make_kuid(current_user_ns(), option);
if (!uid_valid(uid))
return 1;
root->i_uid = uid;
break;
case Opt_gid:
if (match_int(args, &option))
return 1;
*gid = make_kgid(current_user_ns(), option);
if (!gid_valid(*gid))
gid = make_kgid(current_user_ns(), option);
if (!gid_valid(gid))
return 1;
root->i_gid = gid;
break;
case Opt_pgrp:
if (match_int(args, &option))
@ -178,27 +184,27 @@ static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid,
case Opt_minproto:
if (match_int(args, &option))
return 1;
*minproto = option;
sbi->min_proto = option;
break;
case Opt_maxproto:
if (match_int(args, &option))
return 1;
*maxproto = option;
sbi->max_proto = option;
break;
case Opt_indirect:
set_autofs_type_indirect(type);
set_autofs_type_indirect(&sbi->type);
break;
case Opt_direct:
set_autofs_type_direct(type);
set_autofs_type_direct(&sbi->type);
break;
case Opt_offset:
set_autofs_type_offset(type);
set_autofs_type_offset(&sbi->type);
break;
default:
return 1;
}
}
return (*pipefd < 0);
return (sbi->pipefd < 0);
}
int autofs_fill_super(struct super_block *s, void *data, int silent)
@ -206,7 +212,6 @@ int autofs_fill_super(struct super_block *s, void *data, int silent)
struct inode *root_inode;
struct dentry *root;
struct file *pipe;
int pipefd;
struct autofs_sb_info *sbi;
struct autofs_info *ino;
int pgrp = 0;
@ -262,9 +267,7 @@ int autofs_fill_super(struct super_block *s, void *data, int silent)
root->d_fsdata = ino;
/* Can this call block? */
if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid,
&pgrp, &pgrp_set, &sbi->type, &sbi->min_proto,
&sbi->max_proto)) {
if (parse_options(data, root_inode, &pgrp, &pgrp_set, sbi)) {
pr_err("called with bogus options\n");
goto fail_dput;
}
@ -303,8 +306,9 @@ int autofs_fill_super(struct super_block *s, void *data, int silent)
root_inode->i_fop = &autofs_root_operations;
root_inode->i_op = &autofs_dir_inode_operations;
pr_debug("pipe fd = %d, pgrp = %u\n", pipefd, pid_nr(sbi->oz_pgrp));
pipe = fget(pipefd);
pr_debug("pipe fd = %d, pgrp = %u\n",
sbi->pipefd, pid_nr(sbi->oz_pgrp));
pipe = fget(sbi->pipefd);
if (!pipe) {
pr_err("could not open pipe file descriptor\n");
@ -314,7 +318,6 @@ int autofs_fill_super(struct super_block *s, void *data, int silent)
if (ret < 0)
goto fail_fput;
sbi->pipe = pipe;
sbi->pipefd = pipefd;
sbi->catatonic = 0;
/*