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-rw-r--r--fs/locks.c73
1 files changed, 49 insertions, 24 deletions
diff --git a/fs/locks.c b/fs/locks.c
index e663aeac579e..da57c9b7e844 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -130,6 +130,9 @@
#include <linux/percpu.h>
#include <linux/lglock.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/filelock.h>
+
#include <asm/uaccess.h>
#define IS_POSIX(fl) (fl->fl_flags & FL_POSIX)
@@ -322,6 +325,7 @@ static int flock_make_lock(struct file *filp, struct file_lock **lock,
return -ENOMEM;
fl->fl_file = filp;
+ fl->fl_owner = (fl_owner_t)filp;
fl->fl_pid = current->tgid;
fl->fl_flags = FL_FLOCK;
fl->fl_type = type;
@@ -389,18 +393,6 @@ static int flock64_to_posix_lock(struct file *filp, struct file_lock *fl,
fl->fl_ops = NULL;
fl->fl_lmops = NULL;
- /* Ensure that fl->fl_filp has compatible f_mode */
- switch (l->l_type) {
- case F_RDLCK:
- if (!(filp->f_mode & FMODE_READ))
- return -EBADF;
- break;
- case F_WRLCK:
- if (!(filp->f_mode & FMODE_WRITE))
- return -EBADF;
- break;
- }
-
return assign_type(fl, l->l_type);
}
@@ -439,7 +431,7 @@ static int lease_init(struct file *filp, long type, struct file_lock *fl)
if (assign_type(fl, type) != 0)
return -EINVAL;
- fl->fl_owner = current->files;
+ fl->fl_owner = (fl_owner_t)filp;
fl->fl_pid = current->tgid;
fl->fl_file = filp;
@@ -1298,6 +1290,7 @@ static void time_out_leases(struct inode *inode)
before = &inode->i_flock;
while ((fl = *before) && IS_LEASE(fl) && lease_breaking(fl)) {
+ trace_time_out_leases(inode, fl);
if (past_time(fl->fl_downgrade_time))
lease_modify(before, F_RDLCK);
if (past_time(fl->fl_break_time))
@@ -1385,6 +1378,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
}
if (i_have_this_lease || (mode & O_NONBLOCK)) {
+ trace_break_lease_noblock(inode, new_fl);
error = -EWOULDBLOCK;
goto out;
}
@@ -1396,10 +1390,12 @@ restart:
if (break_time == 0)
break_time++;
locks_insert_block(flock, new_fl);
+ trace_break_lease_block(inode, new_fl);
spin_unlock(&inode->i_lock);
error = wait_event_interruptible_timeout(new_fl->fl_wait,
!new_fl->fl_next, break_time);
spin_lock(&inode->i_lock);
+ trace_break_lease_unblock(inode, new_fl);
locks_delete_block(new_fl);
if (error >= 0) {
if (error == 0)
@@ -1521,6 +1517,8 @@ static int generic_add_lease(struct file *filp, long arg, struct file_lock **flp
int error;
lease = *flp;
+ trace_generic_add_lease(inode, lease);
+
/*
* In the delegation case we need mutual exclusion with
* a number of operations that take the i_mutex. We trylock
@@ -1610,6 +1608,8 @@ static int generic_delete_lease(struct file *filp, struct file_lock **flp)
struct dentry *dentry = filp->f_path.dentry;
struct inode *inode = dentry->d_inode;
+ trace_generic_delete_lease(inode, *flp);
+
for (before = &inode->i_flock;
((fl = *before) != NULL) && IS_LEASE(fl);
before = &fl->fl_next) {
@@ -2034,6 +2034,22 @@ static int do_lock_file_wait(struct file *filp, unsigned int cmd,
return error;
}
+/* Ensure that fl->fl_filp has compatible f_mode for F_SETLK calls */
+static int
+check_fmode_for_setlk(struct file_lock *fl)
+{
+ switch (fl->fl_type) {
+ case F_RDLCK:
+ if (!(fl->fl_file->f_mode & FMODE_READ))
+ return -EBADF;
+ break;
+ case F_WRLCK:
+ if (!(fl->fl_file->f_mode & FMODE_WRITE))
+ return -EBADF;
+ }
+ return 0;
+}
+
/* Apply the lock described by l to an open file descriptor.
* This implements both the F_SETLK and F_SETLKW commands of fcntl().
*/
@@ -2071,6 +2087,10 @@ again:
if (error)
goto out;
+ error = check_fmode_for_setlk(file_lock);
+ if (error)
+ goto out;
+
/*
* If the cmd is requesting file-private locks, then set the
* FL_OFDLCK flag and override the owner.
@@ -2206,6 +2226,10 @@ again:
if (error)
goto out;
+ error = check_fmode_for_setlk(file_lock);
+ if (error)
+ goto out;
+
/*
* If the cmd is requesting file-private locks, then set the
* FL_OFDLCK flag and override the owner.
@@ -2304,6 +2328,7 @@ void locks_remove_file(struct file *filp)
if (filp->f_op->flock) {
struct file_lock fl = {
+ .fl_owner = (fl_owner_t)filp,
.fl_pid = current->tgid,
.fl_file = filp,
.fl_flags = FL_FLOCK,
@@ -2411,31 +2436,31 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl,
seq_printf(f, "%lld:%s ", id, pfx);
if (IS_POSIX(fl)) {
if (fl->fl_flags & FL_ACCESS)
- seq_printf(f, "ACCESS");
+ seq_puts(f, "ACCESS");
else if (IS_OFDLCK(fl))
- seq_printf(f, "OFDLCK");
+ seq_puts(f, "OFDLCK");
else
- seq_printf(f, "POSIX ");
+ seq_puts(f, "POSIX ");
seq_printf(f, " %s ",
(inode == NULL) ? "*NOINODE*" :
mandatory_lock(inode) ? "MANDATORY" : "ADVISORY ");
} else if (IS_FLOCK(fl)) {
if (fl->fl_type & LOCK_MAND) {
- seq_printf(f, "FLOCK MSNFS ");
+ seq_puts(f, "FLOCK MSNFS ");
} else {
- seq_printf(f, "FLOCK ADVISORY ");
+ seq_puts(f, "FLOCK ADVISORY ");
}
} else if (IS_LEASE(fl)) {
- seq_printf(f, "LEASE ");
+ seq_puts(f, "LEASE ");
if (lease_breaking(fl))
- seq_printf(f, "BREAKING ");
+ seq_puts(f, "BREAKING ");
else if (fl->fl_file)
- seq_printf(f, "ACTIVE ");
+ seq_puts(f, "ACTIVE ");
else
- seq_printf(f, "BREAKER ");
+ seq_puts(f, "BREAKER ");
} else {
- seq_printf(f, "UNKNOWN UNKNOWN ");
+ seq_puts(f, "UNKNOWN UNKNOWN ");
}
if (fl->fl_type & LOCK_MAND) {
seq_printf(f, "%s ",
@@ -2467,7 +2492,7 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl,
else
seq_printf(f, "%Ld %Ld\n", fl->fl_start, fl->fl_end);
} else {
- seq_printf(f, "0 EOF\n");
+ seq_puts(f, "0 EOF\n");
}
}
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-24 03:33:01 +0300