This is a prepatory work for the following btrfs fi show command
fixes. So that we have a function get_df to get the fs sizes.
Signed-off-by: Anand Jain <anand.j...@oracle.com>
---
cmds-filesystem.c | 96 +++++++++++++++++++++++++++++++----------------------
1 files changed, 56 insertions(+), 40 deletions(-)
diff --git a/cmds-filesystem.c b/cmds-filesystem.c
index 0f5a30a..b1e105b 100644
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -38,31 +38,12 @@ static const char * const filesystem_cmd_group_usage[] = {
NULL
};
-static const char * const cmd_df_usage[] = {
- "btrfs filesystem df <path>",
- "Show space usage information for a mount point",
- NULL
-};
-
-static int cmd_df(int argc, char **argv)
+static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
{
- struct btrfs_ioctl_space_args *sargs, *sargs_orig;
- u64 count = 0, i;
- int ret;
- int fd;
- int e;
- char *path;
-
- if (check_argc_exact(argc, 2))
- usage(cmd_df_usage);
-
- path = argv[1];
-
- fd = open_file_or_dir(path);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", path);
- return 12;
- }
+ u64 count = 0;
+ int ret, e;
+ struct btrfs_ioctl_space_args *sargs_orig;
+ struct btrfs_ioctl_space_args *sargs;
sargs_orig = sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
if (!sargs)
@@ -74,14 +55,10 @@ static int cmd_df(int argc, char **argv)
ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
e = errno;
if (ret) {
- fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
- path, strerror(e));
- close(fd);
free(sargs);
- return ret;
+ return -e;
}
if (!sargs->total_spaces) {
- close(fd);
free(sargs);
return 0;
}
@@ -91,7 +68,6 @@ static int cmd_df(int argc, char **argv)
sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
(count * sizeof(struct btrfs_ioctl_space_info)));
if (!sargs) {
- close(fd);
free(sargs_orig);
return -ENOMEM;
}
@@ -102,15 +78,20 @@ static int cmd_df(int argc, char **argv)
ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
e = errno;
if (ret) {
- fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
- path, strerror(e));
- close(fd);
free(sargs);
- return ret;
+ return -e;
}
+ *sargs_ret = sargs;
+ return ret;
+}
+static void print_df(struct btrfs_ioctl_space_args *sargs)
+{
+ u64 i;
for (i = 0; i < sargs->total_spaces; i++) {
char description[80];
+ char *total_bytes;
+ char *used_bytes;
int written = 0;
u64 flags = sargs->spaces[i].flags;
@@ -153,14 +134,49 @@ static int cmd_df(int argc, char **argv)
written += 7;
}
- printf("%s: total=%s, used=%s\n", description,
- pretty_size(sargs->spaces[i].total_bytes),
- pretty_size(sargs->spaces[i].used_bytes));
+ total_bytes = pretty_size(sargs->spaces[i].total_bytes);
+ used_bytes = pretty_size(sargs->spaces[i].used_bytes);
+ printf("%s: total=%s, used=%s\n", description, total_bytes,
+ used_bytes);
}
- close(fd);
- free(sargs);
+}
- return 0;
+
+static const char * const cmd_df_usage[] = {
+ "btrfs filesystem df <path>",
+ "Show space usage information for a mount point",
+ NULL
+};
+
+static int cmd_df(int argc, char **argv)
+{
+ struct btrfs_ioctl_space_args *sargs = NULL;
+ int ret;
+ int fd;
+ char *path;
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_df_usage);
+
+ path = argv[1];
+
+ fd = open_file_or_dir(path);
+ if (fd < 0) {
+ fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+ return 12;
+ }
+ ret = get_df(fd, &sargs);
+
+ if (!ret) {
+ if (sargs) {
+ print_df(sargs);
+ free(sargs);
+ }
+ } else
+ fprintf(stderr, "ERROR: get_df failed %s\n", strerror(ret));
+
+ close(fd);
+ return ret;
}
static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
--
1.7.7.6
--
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