From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:43394 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753367Ab3GOF0K (ORCPT ); Mon, 15 Jul 2013 01:26:10 -0400 From: Anand Jain To: linux-btrfs@vger.kernel.org, dsterba@suse.cz Subject: [PATCH 04/11] btrfs-progs: congregate dev scan Date: Mon, 15 Jul 2013 13:30:50 +0800 Message-Id: <1373866257-10519-5-git-send-email-anand.jain@oracle.com> In-Reply-To: <1373866257-10519-1-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: References: <1373866257-10519-1-git-send-email-anand.jain@oracle.com> the dev scan to find btrfs is performed at two locations all most the same way one at filesystem show and another at device scan. They both follow the same steps. This patch does not alter anything except that it brings these two same logic into the function scan_for_btrfs so that we can play tweaking it. the patch which recommends to use /dev/mapper will also need it v3: bring in btrfs_scan_for_fsid to use scan_for_btrfs thanks Signed-off-by: Anand Jain --- cmds-device.c | 11 +++-------- cmds-filesystem.c | 9 +++------ utils.c | 22 ++++++++++++++++++++-- utils.h | 5 ++++- 4 files changed, 30 insertions(+), 17 deletions(-) diff --git a/cmds-device.c b/cmds-device.c index c94fcd5..59edcb9 100644 --- a/cmds-device.c +++ b/cmds-device.c @@ -186,26 +186,21 @@ static const char * const cmd_scan_dev_usage[] = { static int cmd_scan_dev(int argc, char **argv) { int i, fd, e; - int checklist = 1; + int where = BTRFS_SCAN_PROC; int devstart = 1; if( argc > 1 && !strcmp(argv[1],"--all-devices")){ if (check_argc_max(argc, 2)) usage(cmd_scan_dev_usage); - checklist = 0; + where = BTRFS_SCAN_DEV; devstart += 1; } if(argc<=devstart){ - int ret; - printf("Scanning for Btrfs filesystems\n"); - if(checklist) - ret = btrfs_scan_block_devices(1); - else - ret = btrfs_scan_one_dir("/dev", 1); + ret = scan_for_btrfs(where, 1); if (ret){ fprintf(stderr, "ERROR: error %d while scanning\n", ret); return 18; diff --git a/cmds-filesystem.c b/cmds-filesystem.c index a1a8830..6ef6e6b 100644 --- a/cmds-filesystem.c +++ b/cmds-filesystem.c @@ -236,21 +236,18 @@ static int cmd_show(int argc, char **argv) struct list_head *cur_uuid; char *search = 0; int ret; - int checklist = 1; + int where = BTRFS_SCAN_PROC; int searchstart = 1; if( argc > 1 && !strcmp(argv[1],"--all-devices")){ - checklist = 0; + where = BTRFS_SCAN_DEV; searchstart += 1; } if (check_argc_max(argc, searchstart + 1)) usage(cmd_show_usage); - if(checklist) - ret = btrfs_scan_block_devices(0); - else - ret = btrfs_scan_one_dir("/dev", 0); + ret = scan_for_btrfs(where, 0); if (ret){ fprintf(stderr, "ERROR: error %d while scanning\n", ret); diff --git a/utils.c b/utils.c index 4f74d78..345bfdc 100644 --- a/utils.c +++ b/utils.c @@ -1136,9 +1136,9 @@ int btrfs_scan_for_fsid(int run_ioctls) { int ret; - ret = btrfs_scan_block_devices(run_ioctls); + ret = scan_for_btrfs(BTRFS_SCAN_PROC, run_ioctls); if (ret) - ret = btrfs_scan_one_dir("/dev", run_ioctls); + ret = scan_for_btrfs(BTRFS_SCAN_DEV, run_ioctls); return ret; } @@ -1830,3 +1830,21 @@ int test_dev_for_mkfs(char *file, int force_overwrite, char *estr) close(fd); return 0; } + +/* + * scans devs for the btrfs +*/ +int scan_for_btrfs(int where, int update_kernel) +{ + int ret = 0; + + switch (where) { + case BTRFS_SCAN_PROC: + ret = btrfs_scan_block_devices(update_kernel); + break; + case BTRFS_SCAN_DEV: + ret = btrfs_scan_one_dir("/dev", update_kernel); + break; + } + return ret; +} diff --git a/utils.h b/utils.h index 5e5ea53..bdfa76b 100644 --- a/utils.h +++ b/utils.h @@ -24,6 +24,9 @@ #define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024) +#define BTRFS_SCAN_PROC 1 +#define BTRFS_SCAN_DEV 2 + int make_btrfs(int fd, const char *device, const char *label, u64 blocks[6], u64 num_bytes, u32 nodesize, u32 leafsize, u32 sectorsize, u32 stripesize); @@ -72,5 +75,5 @@ u64 btrfs_device_size(int fd, struct stat *st); /* Helper to always get proper size of the destination string */ #define strncpy_null(dest, src) __strncpy__null(dest, src, sizeof(dest)) int test_dev_for_mkfs(char *file, int force_overwrite, char *estr); - +int scan_for_btrfs(int where, int update_kernel); #endif -- 1.7.7.6