From 0e9b10a90f1c30f25dd6f130130240745ab14010 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 23 Feb 2013 15:22:43 -0500 Subject: [PATCH] target: writev() on single-element vector is pointless ... in other news: filp_open() can't return a struct file with NULL dentry filp_open() can't return a struct file negative dentry filp_close() of something that never had been in any descriptor tables is pointless - fput() is all you need Signed-off-by: Al Viro --- drivers/target/target_core_alua.c | 35 ++++++++----------------------- drivers/target/target_core_pr.c | 27 +++++++----------------- 2 files changed, 17 insertions(+), 45 deletions(-) diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c index 7d4ec02e29a..ff1c5ee352c 100644 --- a/drivers/target/target_core_alua.c +++ b/drivers/target/target_core_alua.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -715,36 +716,18 @@ static int core_alua_write_tpg_metadata( unsigned char *md_buf, u32 md_buf_len) { - mm_segment_t old_fs; - struct file *file; - struct iovec iov[1]; - int flags = O_RDWR | O_CREAT | O_TRUNC, ret; - - memset(iov, 0, sizeof(struct iovec)); + struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); + int ret; - file = filp_open(path, flags, 0600); - if (IS_ERR(file) || !file || !file->f_dentry) { - pr_err("filp_open(%s) for ALUA metadata failed\n", - path); + if (IS_ERR(file)) { + pr_err("filp_open(%s) for ALUA metadata failed\n", path); return -ENODEV; } - - iov[0].iov_base = &md_buf[0]; - iov[0].iov_len = md_buf_len; - - old_fs = get_fs(); - set_fs(get_ds()); - ret = vfs_writev(file, &iov[0], 1, &file->f_pos); - set_fs(old_fs); - - if (ret < 0) { + ret = kernel_write(file, md_buf, md_buf_len, 0); + if (ret < 0) pr_err("Error writing ALUA metadata file: %s\n", path); - filp_close(file, NULL); - return -EIO; - } - filp_close(file, NULL); - - return 0; + fput(file); + return ret ? -EIO : 0; } /* diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index 8e0290b38e4..3240f2cc81e 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -1957,13 +1958,10 @@ static int __core_scsi3_write_aptpl_to_file( { struct t10_wwn *wwn = &dev->t10_wwn; struct file *file; - struct iovec iov[1]; - mm_segment_t old_fs; int flags = O_RDWR | O_CREAT | O_TRUNC; char path[512]; int ret; - memset(iov, 0, sizeof(struct iovec)); memset(path, 0, 512); if (strlen(&wwn->unit_serial[0]) >= 512) { @@ -1974,31 +1972,22 @@ static int __core_scsi3_write_aptpl_to_file( snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); file = filp_open(path, flags, 0600); - if (IS_ERR(file) || !file || !file->f_dentry) { + if (IS_ERR(file)) { pr_err("filp_open(%s) for APTPL metadata" " failed\n", path); - return IS_ERR(file) ? PTR_ERR(file) : -ENOENT; + return PTR_ERR(file); } - iov[0].iov_base = &buf[0]; if (!pr_aptpl_buf_len) - iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ - else - iov[0].iov_len = pr_aptpl_buf_len; + pr_aptpl_buf_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ - old_fs = get_fs(); - set_fs(get_ds()); - ret = vfs_writev(file, &iov[0], 1, &file->f_pos); - set_fs(old_fs); + ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); - if (ret < 0) { + if (ret < 0) pr_debug("Error writing APTPL metadata file: %s\n", path); - filp_close(file, NULL); - return -EIO; - } - filp_close(file, NULL); + fput(file); - return 0; + return ret ? -EIO : 0; } static int -- 2.41.0