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-rw-r--r--fs/autofs4/autofs_i.h9
-rw-r--r--fs/autofs4/dev-ioctl.c77
-rw-r--r--fs/autofs4/expire.c55
-rw-r--r--fs/autofs4/inode.c47
-rw-r--r--fs/autofs4/root.c10
-rw-r--r--fs/autofs4/waitq.c4
6 files changed, 110 insertions, 92 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index a439548de785..a1fba4285277 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -20,7 +20,8 @@
#define AUTOFS_IOC_COUNT 32
#define AUTOFS_DEV_IOCTL_IOC_FIRST (AUTOFS_DEV_IOCTL_VERSION)
-#define AUTOFS_DEV_IOCTL_IOC_COUNT (AUTOFS_IOC_COUNT - 11)
+#define AUTOFS_DEV_IOCTL_IOC_COUNT \
+ (AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD - AUTOFS_DEV_IOCTL_VERSION_CMD)
#include <linux/kernel.h>
#include <linux/slab.h>
@@ -33,8 +34,6 @@
#include <asm/current.h>
#include <linux/uaccess.h>
-/* #define DEBUG */
-
#ifdef pr_fmt
#undef pr_fmt
#endif
@@ -111,8 +110,6 @@ struct autofs_sb_info {
int max_proto;
unsigned long exp_timeout;
unsigned int type;
- int reghost_enabled;
- int needs_reghost;
struct super_block *sb;
struct mutex wq_mutex;
struct mutex pipe_mutex;
@@ -271,4 +268,4 @@ static inline void autofs4_del_expiring(struct dentry *dentry)
}
}
-extern void autofs4_kill_sb(struct super_block *);
+void autofs4_kill_sb(struct super_block *);
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index c7fcc7438843..fc09eb77ddf3 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -75,7 +75,7 @@ static int check_dev_ioctl_version(int cmd, struct autofs_dev_ioctl *param)
if ((param->ver_major != AUTOFS_DEV_IOCTL_VERSION_MAJOR) ||
(param->ver_minor > AUTOFS_DEV_IOCTL_VERSION_MINOR)) {
pr_warn("ioctl control interface version mismatch: "
- "kernel(%u.%u), user(%u.%u), cmd(%d)\n",
+ "kernel(%u.%u), user(%u.%u), cmd(0x%08x)\n",
AUTOFS_DEV_IOCTL_VERSION_MAJOR,
AUTOFS_DEV_IOCTL_VERSION_MINOR,
param->ver_major, param->ver_minor, cmd);
@@ -172,6 +172,17 @@ static struct autofs_sb_info *autofs_dev_ioctl_sbi(struct file *f)
return sbi;
}
+/* Return autofs dev ioctl version */
+static int autofs_dev_ioctl_version(struct file *fp,
+ struct autofs_sb_info *sbi,
+ struct autofs_dev_ioctl *param)
+{
+ /* This should have already been set. */
+ param->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
+ param->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
+ return 0;
+}
+
/* Return autofs module protocol version */
static int autofs_dev_ioctl_protover(struct file *fp,
struct autofs_sb_info *sbi,
@@ -586,41 +597,25 @@ out:
static ioctl_fn lookup_dev_ioctl(unsigned int cmd)
{
- static struct {
- int cmd;
- ioctl_fn fn;
- } _ioctls[] = {
- {cmd_idx(AUTOFS_DEV_IOCTL_VERSION_CMD), NULL},
- {cmd_idx(AUTOFS_DEV_IOCTL_PROTOVER_CMD),
- autofs_dev_ioctl_protover},
- {cmd_idx(AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD),
- autofs_dev_ioctl_protosubver},
- {cmd_idx(AUTOFS_DEV_IOCTL_OPENMOUNT_CMD),
- autofs_dev_ioctl_openmount},
- {cmd_idx(AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD),
- autofs_dev_ioctl_closemount},
- {cmd_idx(AUTOFS_DEV_IOCTL_READY_CMD),
- autofs_dev_ioctl_ready},
- {cmd_idx(AUTOFS_DEV_IOCTL_FAIL_CMD),
- autofs_dev_ioctl_fail},
- {cmd_idx(AUTOFS_DEV_IOCTL_SETPIPEFD_CMD),
- autofs_dev_ioctl_setpipefd},
- {cmd_idx(AUTOFS_DEV_IOCTL_CATATONIC_CMD),
- autofs_dev_ioctl_catatonic},
- {cmd_idx(AUTOFS_DEV_IOCTL_TIMEOUT_CMD),
- autofs_dev_ioctl_timeout},
- {cmd_idx(AUTOFS_DEV_IOCTL_REQUESTER_CMD),
- autofs_dev_ioctl_requester},
- {cmd_idx(AUTOFS_DEV_IOCTL_EXPIRE_CMD),
- autofs_dev_ioctl_expire},
- {cmd_idx(AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD),
- autofs_dev_ioctl_askumount},
- {cmd_idx(AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD),
- autofs_dev_ioctl_ismountpoint}
+ static ioctl_fn _ioctls[] = {
+ autofs_dev_ioctl_version,
+ autofs_dev_ioctl_protover,
+ autofs_dev_ioctl_protosubver,
+ autofs_dev_ioctl_openmount,
+ autofs_dev_ioctl_closemount,
+ autofs_dev_ioctl_ready,
+ autofs_dev_ioctl_fail,
+ autofs_dev_ioctl_setpipefd,
+ autofs_dev_ioctl_catatonic,
+ autofs_dev_ioctl_timeout,
+ autofs_dev_ioctl_requester,
+ autofs_dev_ioctl_expire,
+ autofs_dev_ioctl_askumount,
+ autofs_dev_ioctl_ismountpoint,
};
unsigned int idx = cmd_idx(cmd);
- return (idx >= ARRAY_SIZE(_ioctls)) ? NULL : _ioctls[idx].fn;
+ return (idx >= ARRAY_SIZE(_ioctls)) ? NULL : _ioctls[idx];
}
/* ioctl dispatcher */
@@ -642,7 +637,7 @@ static int _autofs_dev_ioctl(unsigned int command,
cmd = _IOC_NR(command);
if (_IOC_TYPE(command) != _IOC_TYPE(AUTOFS_DEV_IOCTL_IOC_FIRST) ||
- cmd - cmd_first >= AUTOFS_DEV_IOCTL_IOC_COUNT) {
+ cmd - cmd_first > AUTOFS_DEV_IOCTL_IOC_COUNT) {
return -ENOTTY;
}
@@ -655,14 +650,11 @@ static int _autofs_dev_ioctl(unsigned int command,
if (err)
goto out;
- /* The validate routine above always sets the version */
- if (cmd == AUTOFS_DEV_IOCTL_VERSION_CMD)
- goto done;
-
fn = lookup_dev_ioctl(cmd);
if (!fn) {
pr_warn("unknown command 0x%08x\n", command);
- return -ENOTTY;
+ err = -ENOTTY;
+ goto out;
}
fp = NULL;
@@ -671,9 +663,11 @@ static int _autofs_dev_ioctl(unsigned int command,
/*
* For obvious reasons the openmount can't have a file
* descriptor yet. We don't take a reference to the
- * file during close to allow for immediate release.
+ * file during close to allow for immediate release,
+ * and the same for retrieving ioctl version.
*/
- if (cmd != AUTOFS_DEV_IOCTL_OPENMOUNT_CMD &&
+ if (cmd != AUTOFS_DEV_IOCTL_VERSION_CMD &&
+ cmd != AUTOFS_DEV_IOCTL_OPENMOUNT_CMD &&
cmd != AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD) {
fp = fget(param->ioctlfd);
if (!fp) {
@@ -706,7 +700,6 @@ cont:
if (fp)
fput(fp);
-done:
if (err >= 0 && copy_to_user(user, param, AUTOFS_DEV_IOCTL_SIZE))
err = -EFAULT;
out:
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index b493909e7492..d8e6d421c27f 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -417,6 +417,7 @@ static struct dentry *should_expire(struct dentry *dentry,
}
return NULL;
}
+
/*
* Find an eligible tree to time-out
* A tree is eligible if :-
@@ -432,6 +433,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
struct dentry *root = sb->s_root;
struct dentry *dentry;
struct dentry *expired;
+ struct dentry *found;
struct autofs_info *ino;
if (!root)
@@ -442,31 +444,46 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
dentry = NULL;
while ((dentry = get_next_positive_subdir(dentry, root))) {
+ int flags = how;
+
spin_lock(&sbi->fs_lock);
ino = autofs4_dentry_ino(dentry);
- if (ino->flags & AUTOFS_INF_WANT_EXPIRE)
- expired = NULL;
- else
- expired = should_expire(dentry, mnt, timeout, how);
- if (!expired) {
+ if (ino->flags & AUTOFS_INF_WANT_EXPIRE) {
spin_unlock(&sbi->fs_lock);
continue;
}
+ spin_unlock(&sbi->fs_lock);
+
+ expired = should_expire(dentry, mnt, timeout, flags);
+ if (!expired)
+ continue;
+
+ spin_lock(&sbi->fs_lock);
ino = autofs4_dentry_ino(expired);
ino->flags |= AUTOFS_INF_WANT_EXPIRE;
spin_unlock(&sbi->fs_lock);
synchronize_rcu();
- spin_lock(&sbi->fs_lock);
- if (should_expire(expired, mnt, timeout, how)) {
- if (expired != dentry)
- dput(dentry);
- goto found;
- }
+ /* Make sure a reference is not taken on found if
+ * things have changed.
+ */
+ flags &= ~AUTOFS_EXP_LEAVES;
+ found = should_expire(expired, mnt, timeout, how);
+ if (!found || found != expired)
+ /* Something has changed, continue */
+ goto next;
+
+ if (expired != dentry)
+ dput(dentry);
+
+ spin_lock(&sbi->fs_lock);
+ goto found;
+next:
+ spin_lock(&sbi->fs_lock);
ino->flags &= ~AUTOFS_INF_WANT_EXPIRE;
+ spin_unlock(&sbi->fs_lock);
if (expired != dentry)
dput(expired);
- spin_unlock(&sbi->fs_lock);
}
return NULL;
@@ -483,6 +500,7 @@ int autofs4_expire_wait(struct dentry *dentry, int rcu_walk)
struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
struct autofs_info *ino = autofs4_dentry_ino(dentry);
int status;
+ int state;
/* Block on any pending expire */
if (!(ino->flags & AUTOFS_INF_WANT_EXPIRE))
@@ -490,8 +508,19 @@ int autofs4_expire_wait(struct dentry *dentry, int rcu_walk)
if (rcu_walk)
return -ECHILD;
+retry:
spin_lock(&sbi->fs_lock);
- if (ino->flags & AUTOFS_INF_EXPIRING) {
+ state = ino->flags & (AUTOFS_INF_WANT_EXPIRE | AUTOFS_INF_EXPIRING);
+ if (state == AUTOFS_INF_WANT_EXPIRE) {
+ spin_unlock(&sbi->fs_lock);
+ /*
+ * Possibly being selected for expire, wait until
+ * it's selected or not.
+ */
+ schedule_timeout_uninterruptible(HZ/10);
+ goto retry;
+ }
+ if (state & AUTOFS_INF_EXPIRING) {
spin_unlock(&sbi->fs_lock);
pr_debug("waiting for expire %p name=%pd\n", dentry, dentry);
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 61b21051bd5a..438b5bf675b6 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -274,6 +274,23 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
goto fail_dput;
}
+ /* Test versions first */
+ if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION ||
+ sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
+ pr_err("kernel does not match daemon version "
+ "daemon (%d, %d) kernel (%d, %d)\n",
+ sbi->min_proto, sbi->max_proto,
+ AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
+ goto fail_dput;
+ }
+
+ /* Establish highest kernel protocol version */
+ if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
+ sbi->version = AUTOFS_MAX_PROTO_VERSION;
+ else
+ sbi->version = sbi->max_proto;
+ sbi->sub_version = AUTOFS_PROTO_SUBVERSION;
+
if (pgrp_set) {
sbi->oz_pgrp = find_get_pid(pgrp);
if (!sbi->oz_pgrp) {
@@ -291,29 +308,12 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
root_inode->i_fop = &autofs4_root_operations;
root_inode->i_op = &autofs4_dir_inode_operations;
- /* Couldn't this be tested earlier? */
- if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION ||
- sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
- pr_err("kernel does not match daemon version "
- "daemon (%d, %d) kernel (%d, %d)\n",
- sbi->min_proto, sbi->max_proto,
- AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
- goto fail_dput;
- }
-
- /* Establish highest kernel protocol version */
- if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
- sbi->version = AUTOFS_MAX_PROTO_VERSION;
- else
- sbi->version = sbi->max_proto;
- sbi->sub_version = AUTOFS_PROTO_SUBVERSION;
-
pr_debug("pipe fd = %d, pgrp = %u\n", pipefd, pid_nr(sbi->oz_pgrp));
pipe = fget(pipefd);
if (!pipe) {
pr_err("could not open pipe file descriptor\n");
- goto fail_dput;
+ goto fail_put_pid;
}
ret = autofs_prepare_pipe(pipe);
if (ret < 0)
@@ -334,14 +334,14 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
fail_fput:
pr_err("pipe file descriptor does not contain proper ops\n");
fput(pipe);
- /* fall through */
+fail_put_pid:
+ put_pid(sbi->oz_pgrp);
fail_dput:
dput(root);
goto fail_free;
fail_ino:
- kfree(ino);
+ autofs4_free_ino(ino);
fail_free:
- put_pid(sbi->oz_pgrp);
kfree(sbi);
s->s_fs_info = NULL;
return ret;
@@ -359,7 +359,7 @@ struct inode *autofs4_get_inode(struct super_block *sb, umode_t mode)
inode->i_uid = d_inode(sb->s_root)->i_uid;
inode->i_gid = d_inode(sb->s_root)->i_gid;
}
- inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
inode->i_ino = get_next_ino();
if (S_ISDIR(mode)) {
@@ -368,7 +368,8 @@ struct inode *autofs4_get_inode(struct super_block *sb, umode_t mode)
inode->i_fop = &autofs4_dir_operations;
} else if (S_ISLNK(mode)) {
inode->i_op = &autofs4_symlink_inode_operations;
- }
+ } else
+ WARN_ON(1);
return inode;
}
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index fa84bb8832e0..a11f73174877 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -577,8 +577,6 @@ static int autofs4_dir_symlink(struct inode *dir,
inode = autofs4_get_inode(dir->i_sb, S_IFLNK | 0555);
if (!inode) {
kfree(cp);
- if (!dentry->d_fsdata)
- kfree(ino);
return -ENOMEM;
}
inode->i_private = cp;
@@ -591,7 +589,7 @@ static int autofs4_dir_symlink(struct inode *dir,
if (p_ino && !IS_ROOT(dentry))
atomic_inc(&p_ino->count);
- dir->i_mtime = CURRENT_TIME;
+ dir->i_mtime = current_time(dir);
return 0;
}
@@ -631,7 +629,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
d_inode(dentry)->i_size = 0;
clear_nlink(d_inode(dentry));
- dir->i_mtime = CURRENT_TIME;
+ dir->i_mtime = current_time(dir);
spin_lock(&sbi->lookup_lock);
__autofs4_add_expiring(dentry);
@@ -762,7 +760,7 @@ static int autofs4_dir_mkdir(struct inode *dir,
if (p_ino && !IS_ROOT(dentry))
atomic_inc(&p_ino->count);
inc_nlink(dir);
- dir->i_mtime = CURRENT_TIME;
+ dir->i_mtime = current_time(dir);
return 0;
}
@@ -842,7 +840,7 @@ static inline int autofs4_ask_umount(struct vfsmount *mnt, int __user *p)
if (may_umount(mnt))
status = 1;
- pr_debug("returning %d\n", status);
+ pr_debug("may umount %d\n", status);
status = put_user(status, p);
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 431fd7ee3488..e44271dfceb6 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -431,8 +431,8 @@ int autofs4_wait(struct autofs_sb_info *sbi,
memcpy(&wq->name, &qstr, sizeof(struct qstr));
wq->dev = autofs4_get_dev(sbi);
wq->ino = autofs4_get_ino(sbi);
- wq->uid = current_uid();
- wq->gid = current_gid();
+ wq->uid = current_real_cred()->uid;
+ wq->gid = current_real_cred()->gid;
wq->pid = pid;
wq->tgid = tgid;
wq->status = -EINTR; /* Status return if interrupted */
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-29 15:20:53 +0000