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mount: optional support for -vv verbosity

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mount: do "struct globals" trick

With -vv on:

function                                             old     new   delta
verbose_mount                                          -      83     +83
mount_main                                           970     988     +18
mount_it_now                                         219     229     +10
singlemount                                         4564    4570      +6
mount_option_str                                     227     233      +6
nfs_mount_version                                      1       -      -1
fslist                                                 4       -      -4
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 4/0 up/down: 123/-5)            Total: 118 bytes
This commit is contained in:
Denis Vlasenko 2008-02-18 12:07:49 +00:00
parent c9ca0a3274
commit f732e96757
2 changed files with 57 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
util-linux/Config.in
View File

@ -393,6 +393,15 @@ config FEATURE_MOUNT_FAKE
help
Enable support for faking a file system mount.
config FEATURE_MOUNT_VERBOSE
bool "mount -v option"
default n
depends on MOUNT
help
Enable multi-level -v[vv...] verbose messages. Useful if you
debug mount problems and want to see what is exactly passed
to the kernel.
config FEATURE_MOUNT_HELPERS
bool "Support mount helpers"
default n

60
util-linux/mount.c
View File

@ -50,8 +50,6 @@ static struct mntent *getmntent_r(FILE* stream, struct mntent* result, char* buf
}
#endif
#define getmntent_buf bb_common_bufsiz1
// Not real flags, but we want to be able to check for this.
enum {
@ -204,6 +202,44 @@ static const char mount_option_str[] =
"remount" "\0" // action flag
;
struct globals {
#if ENABLE_FEATURE_MOUNT_NFS
smalluint nfs_mount_version;
#endif
#if ENABLE_FEATURE_MOUNT_VERBOSE
unsigned verbose;
#endif
llist_t *fslist;
char getmntent_buf[sizeof(bb_common_bufsiz1) - 8*3];
};
#define G (*(struct globals*)&bb_common_bufsiz1)
#define nfs_mount_version (G.nfs_mount_version)
#define verbose (G.verbose )
#define fslist (G.fslist )
#define getmntent_buf (G.getmntent_buf )
#if ENABLE_FEATURE_MOUNT_VERBOSE
static int verbose_mount(const char *source, const char *target,
const char *filesystemtype,
unsigned long mountflags, const void *data)
{
int rc;
errno = 0;
rc = mount(source, target, filesystemtype, mountflags, data);
if (verbose >= 2)
bb_perror_msg("mount('%s','%s','%s',0x%08lx,'%s'):%d",
source, target, filesystemtype,
mountflags, (char*)data, rc);
return rc;
}
#else
#define verbose_mount(...) mount(__VA_ARGS__)
#endif
/* Append mount options to string */
static void append_mount_options(char **oldopts, const char *newopts)
{
@ -313,8 +349,6 @@ static llist_t *get_block_backed_filesystems(void)
return list;
}
static llist_t *fslist;
#if ENABLE_FEATURE_CLEAN_UP
static void delete_block_backed_filesystems(void)
{
@ -333,9 +367,9 @@ static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
if (fakeIt) goto mtab;
// Mount, with fallback to read-only if necessary.
for (;;) {
rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
errno = 0;
rc = verbose_mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
vfsflags, filteropts);
// If mount failed, try
@ -738,8 +772,6 @@ static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp)
#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
static smalluint nfs_mount_version;
/*
* Unfortunately, the kernel prints annoying console messages
* in case of an unexpected nfs mount version (instead of
@ -1674,8 +1706,8 @@ int mount_main(int argc, char **argv)
sanitize_env_if_suid();
/* parse long options, like --bind and --move. Note that -o option
* and --option are synonymous. Yes, this means --remount,rw works. */
// Parse long options, like --bind and --move. Note that -o option
// and --option are synonymous. Yes, this means --remount,rw works.
for (i = j = 0; i < argc; i++) {
if (argv[i][0] == '-' && argv[i][1] == '-') {
@ -1687,7 +1719,11 @@ int mount_main(int argc, char **argv)
// Parse remaining options
opt = getopt32(argv, OPTION_STR, &opt_o, &fstype);
#if ENABLE_FEATURE_MOUNT_VERBOSE
opt_complementary = "vv"; // -v is a counter
#endif
opt = getopt32(argv, OPTION_STR, &opt_o, &fstype
USE_FEATURE_MOUNT_VERBOSE(, &verbose));
if (opt & OPT_o) append_mount_options(&cmdopts, opt_o); // -o
if (opt & OPT_r) append_mount_options(&cmdopts, "ro"); // -r
if (opt & OPT_w) append_mount_options(&cmdopts, "rw"); // -w
@ -1747,7 +1783,7 @@ int mount_main(int argc, char **argv)
if (ENABLE_FEATURE_MOUNT_FLAGS
&& (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
) {
rc = mount("", argv[0], "", i, "");
rc = verbose_mount("", argv[0], "", i, "");
if (rc) bb_simple_perror_msg_and_die(argv[0]);
goto clean_up;
}