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Subject[PATCH v2 3/5] autofs - simplify parse_options() function call
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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.
---
fs/autofs/inode.c | 55 ++++++++++++++++++++++++++++-------------------------
1 file changed, 29 insertions(+), 26 deletions(-)

diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index e5c06b5a7371..ccedd12c1ac5 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -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;
@@ -266,9 +271,7 @@ 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;
}
@@ -307,9 +310,10 @@ 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));
+ pr_debug("pipe fd = %d, pgrp = %u\n",
+ sbi->pipefd, pid_nr(sbi->oz_pgrp));

- pipe = fget(pipefd);
+ pipe = fget(sbi->pipefd);
if (!pipe) {
pr_err("could not open pipe file descriptor\n");
goto fail_put_pid;
@@ -318,7 +322,6 @@ 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;

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