From a973909fc32be90884280b7a8cd2f2e093c97890 Mon Sep 17 00:00:00 2001 From: "Denis V. Lunev" Date: Tue, 29 Apr 2008 01:02:17 -0700 Subject: [PATCH] scsi: use non-racy method for proc entries creation Use proc_create() to make sure that ->proc_fops be setup before gluing PDE to main tree. Add correct ->owner to proc_fops to fix reading/module unloading race. Signed-off-by: Denis V. Lunev Cc: Greg Kroah-Hartman Cc: Alexey Dobriyan Cc: "Eric W. Biederman" Cc: James Bottomley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/scsi/scsi_proc.c | 4 ++-- drivers/scsi/sg.c | 12 ++++-------- 2 files changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/scsi_proc.c b/drivers/scsi/scsi_proc.c index 3a1c99d5c775..e4a0d2f9b357 100644 --- a/drivers/scsi/scsi_proc.c +++ b/drivers/scsi/scsi_proc.c @@ -413,6 +413,7 @@ static int proc_scsi_open(struct inode *inode, struct file *file) } static const struct file_operations proc_scsi_operations = { + .owner = THIS_MODULE, .open = proc_scsi_open, .read = seq_read, .write = proc_scsi_write, @@ -431,10 +432,9 @@ int __init scsi_init_procfs(void) if (!proc_scsi) goto err1; - pde = create_proc_entry("scsi/scsi", 0, NULL); + pde = proc_create("scsi/scsi", 0, NULL, &proc_scsi_operations); if (!pde) goto err2; - pde->proc_fops = &proc_scsi_operations; return 0; diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 2029422bc04d..c9d7f721b9e2 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -2667,7 +2667,6 @@ sg_proc_init(void) { int k, mask; int num_leaves = ARRAY_SIZE(sg_proc_leaf_arr); - struct proc_dir_entry *pdep; struct sg_proc_leaf * leaf; sg_proc_sgp = proc_mkdir(sg_proc_sg_dirname, NULL); @@ -2676,13 +2675,10 @@ sg_proc_init(void) for (k = 0; k < num_leaves; ++k) { leaf = &sg_proc_leaf_arr[k]; mask = leaf->fops->write ? S_IRUGO | S_IWUSR : S_IRUGO; - pdep = create_proc_entry(leaf->name, mask, sg_proc_sgp); - if (pdep) { - leaf->fops->owner = THIS_MODULE, - leaf->fops->read = seq_read, - leaf->fops->llseek = seq_lseek, - pdep->proc_fops = leaf->fops; - } + leaf->fops->owner = THIS_MODULE; + leaf->fops->read = seq_read; + leaf->fops->llseek = seq_lseek; + proc_create(leaf->name, mask, sg_proc_sgp, leaf->fops); } return 0; } -- 2.20.1