diff options
Diffstat (limited to 'fs_mgr')
| -rw-r--r-- | fs_mgr/fs_mgr.c | 314 | ||||
| -rw-r--r-- | fs_mgr/fs_mgr_main.c | 9 | ||||
| -rw-r--r-- | fs_mgr/fs_mgr_priv.h | 23 | ||||
| -rw-r--r-- | fs_mgr/include/fs_mgr.h | 45 |
4 files changed, 288 insertions, 103 deletions
diff --git a/fs_mgr/fs_mgr.c b/fs_mgr/fs_mgr.c index e51c9cf..fd6f13d 100644 --- a/fs_mgr/fs_mgr.c +++ b/fs_mgr/fs_mgr.c @@ -72,6 +72,9 @@ static struct flag_list fs_mgr_flags[] = { { "wait", MF_WAIT }, { "check", MF_CHECK }, { "encryptable=",MF_CRYPT }, + { "nonremovable",MF_NONREMOVABLE }, + { "voldmanaged=",MF_VOLDMANAGED}, + { "length=", MF_LENGTH }, { "defaults", 0 }, { 0, 0 }, }; @@ -106,7 +109,8 @@ static int wait_for_file(const char *filename, int timeout) return ret; } -static int parse_flags(char *flags, struct flag_list *fl, char **key_loc, +static int parse_flags(char *flags, struct flag_list *fl, + char **key_loc, long long *part_length, char **label, int *partnum, char *fs_options, int fs_options_len) { int f = 0; @@ -119,6 +123,18 @@ static int parse_flags(char *flags, struct flag_list *fl, char **key_loc, if (key_loc) { *key_loc = NULL; } + /* initialize part_length to 0, if we find an MF_LENGTH flag, + * then we'll set part_length to the proper value */ + if (part_length) { + *part_length = 0; + } + if (partnum) { + *partnum = -1; + } + if (label) { + *label = NULL; + } + /* initialize fs_options to the null string */ if (fs_options && (fs_options_len > 0)) { fs_options[0] = '\0'; @@ -137,6 +153,36 @@ static int parse_flags(char *flags, struct flag_list *fl, char **key_loc, * location of the keys. Get it and return it. */ *key_loc = strdup(strchr(p, '=') + 1); + } else if ((fl[i].flag == MF_LENGTH) && part_length) { + /* The length flag is followed by an = and the + * size of the partition. Get it and return it. + */ + *part_length = strtoll(strchr(p, '=') + 1, NULL, 0); + } else if ((fl[i].flag == MF_VOLDMANAGED) && label && partnum) { + /* The voldmanaged flag is followed by an = and the + * label, a colon and the partition number or the + * word "auto", e.g. + * voldmanaged=sdcard:3 + * Get and return them. + */ + char *label_start; + char *label_end; + char *part_start; + + label_start = strchr(p, '=') + 1; + label_end = strchr(p, ':'); + if (label_end) { + *label = strndup(label_start, + (int) (label_end - label_start)); + part_start = strchr(p, ':') + 1; + if (!strcmp(part_start, "auto")) { + *partnum = -1; + } else { + *partnum = strtol(part_start, NULL, 0); + } + } else { + ERROR("Warning: voldmanaged= flag malformed\n"); + } } break; } @@ -227,7 +273,7 @@ static char *fs_getline(char *buf, int size, FILE *file) } } -static struct fstab_rec *read_fstab(char *fstab_path) +struct fstab *fs_mgr_read_fstab(const char *fstab_path) { FILE *fstab_file; int cnt, entries; @@ -235,8 +281,12 @@ static struct fstab_rec *read_fstab(char *fstab_path) char line[256]; const char *delim = " \t"; char *save_ptr, *p; - struct fstab_rec *fstab; + struct fstab *fstab; + struct fstab_rec *recs; char *key_loc; + long long part_length; + char *label; + int partnum; #define FS_OPTIONS_LEN 1024 char tmp_fs_options[FS_OPTIONS_LEN]; @@ -269,7 +319,11 @@ static struct fstab_rec *read_fstab(char *fstab_path) return 0; } - fstab = calloc(entries + 1, sizeof(struct fstab_rec)); + /* Allocate and init the fstab structure */ + fstab = calloc(1, sizeof(struct fstab)); + fstab->num_entries = entries; + fstab->fstab_filename = strdup(fstab_path); + fstab->recs = calloc(fstab->num_entries, sizeof(struct fstab_rec)); fseek(fstab_file, 0, SEEK_SET); @@ -303,41 +357,48 @@ static struct fstab_rec *read_fstab(char *fstab_path) ERROR("Error parsing mount source\n"); return 0; } - fstab[cnt].blk_dev = strdup(p); + fstab->recs[cnt].blk_device = strdup(p); if (!(p = strtok_r(NULL, delim, &save_ptr))) { - ERROR("Error parsing mnt_point\n"); + ERROR("Error parsing mount_point\n"); return 0; } - fstab[cnt].mnt_point = strdup(p); + fstab->recs[cnt].mount_point = strdup(p); if (!(p = strtok_r(NULL, delim, &save_ptr))) { ERROR("Error parsing fs_type\n"); return 0; } - fstab[cnt].type = strdup(p); + fstab->recs[cnt].fs_type = strdup(p); if (!(p = strtok_r(NULL, delim, &save_ptr))) { ERROR("Error parsing mount_flags\n"); return 0; } tmp_fs_options[0] = '\0'; - fstab[cnt].flags = parse_flags(p, mount_flags, 0, tmp_fs_options, FS_OPTIONS_LEN); + fstab->recs[cnt].flags = parse_flags(p, mount_flags, + NULL, NULL, NULL, NULL, + tmp_fs_options, FS_OPTIONS_LEN); /* fs_options are optional */ if (tmp_fs_options[0]) { - fstab[cnt].fs_options = strdup(tmp_fs_options); + fstab->recs[cnt].fs_options = strdup(tmp_fs_options); } else { - fstab[cnt].fs_options = NULL; + fstab->recs[cnt].fs_options = NULL; } if (!(p = strtok_r(NULL, delim, &save_ptr))) { ERROR("Error parsing fs_mgr_options\n"); return 0; } - fstab[cnt].fs_mgr_flags = parse_flags(p, fs_mgr_flags, &key_loc, 0, 0); - fstab[cnt].key_loc = key_loc; - + fstab->recs[cnt].fs_mgr_flags = parse_flags(p, fs_mgr_flags, + &key_loc, &part_length, + &label, &partnum, + NULL, 0); + fstab->recs[cnt].key_loc = key_loc; + fstab->recs[cnt].length = part_length; + fstab->recs[cnt].label = label; + fstab->recs[cnt].partnum = partnum; cnt++; } fclose(fstab_file); @@ -345,26 +406,32 @@ static struct fstab_rec *read_fstab(char *fstab_path) return fstab; } -static void free_fstab(struct fstab_rec *fstab) +void fs_mgr_free_fstab(struct fstab *fstab) { - int i = 0; + int i; - while (fstab[i].blk_dev) { + for (i = 0; i < fstab->num_entries; i++) { /* Free the pointers return by strdup(3) */ - free(fstab[i].blk_dev); - free(fstab[i].mnt_point); - free(fstab[i].type); - free(fstab[i].fs_options); - free(fstab[i].key_loc); - + free(fstab->recs[i].blk_device); + free(fstab->recs[i].mount_point); + free(fstab->recs[i].fs_type); + free(fstab->recs[i].fs_options); + free(fstab->recs[i].key_loc); + free(fstab->recs[i].label); i++; } - /* Free the actual fstab array created by calloc(3) */ + /* Free the fstab_recs array created by calloc(3) */ + free(fstab->recs); + + /* Free the fstab filename */ + free(fstab->fstab_filename); + + /* Free fstab */ free(fstab); } -static void check_fs(char *blk_dev, char *type, char *target) +static void check_fs(char *blk_device, char *fs_type, char *target) { pid_t pid; int status; @@ -373,7 +440,7 @@ static void check_fs(char *blk_dev, char *type, char *target) char *tmpmnt_opts = "nomblk_io_submit,errors=remount-ro"; /* Check for the types of filesystems we know how to check */ - if (!strcmp(type, "ext2") || !strcmp(type, "ext3") || !strcmp(type, "ext4")) { + if (!strcmp(fs_type, "ext2") || !strcmp(fs_type, "ext3") || !strcmp(fs_type, "ext4")) { /* * First try to mount and unmount the filesystem. We do this because * the kernel is more efficient than e2fsck in running the journal and @@ -387,19 +454,19 @@ static void check_fs(char *blk_dev, char *type, char *target) * filesytsem due to an error, e2fsck is still run to do a full check * fix the filesystem. */ - ret = mount(blk_dev, target, type, tmpmnt_flags, tmpmnt_opts); - if (! ret) { + ret = mount(blk_device, target, fs_type, tmpmnt_flags, tmpmnt_opts); + if (!ret) { umount(target); } - INFO("Running %s on %s\n", E2FSCK_BIN, blk_dev); + INFO("Running %s on %s\n", E2FSCK_BIN, blk_device); pid = fork(); if (pid > 0) { /* Parent, wait for the child to return */ waitpid(pid, &status, 0); } else if (pid == 0) { /* child, run checker */ - execlp(E2FSCK_BIN, E2FSCK_BIN, "-y", blk_dev, (char *)NULL); + execlp(E2FSCK_BIN, E2FSCK_BIN, "-y", blk_device, (char *)NULL); /* Only gets here on error */ ERROR("Cannot run fs_mgr binary %s\n", E2FSCK_BIN); @@ -443,49 +510,62 @@ static int fs_match(char *in1, char *in2) return ret; } -int fs_mgr_mount_all(char *fstab_file) +int fs_mgr_mount_all(struct fstab *fstab) { int i = 0; int encrypted = 0; int ret = -1; int mret; - struct fstab_rec *fstab = 0; - if (!(fstab = read_fstab(fstab_file))) { + if (!fstab) { return ret; } - for (i = 0; fstab[i].blk_dev; i++) { - if (fstab[i].fs_mgr_flags & MF_WAIT) { - wait_for_file(fstab[i].blk_dev, WAIT_TIMEOUT); + for (i = 0; i < fstab->num_entries; i++) { + /* Don't mount entries that are managed by vold */ + if (fstab->recs[i].fs_mgr_flags & MF_VOLDMANAGED) { + continue; } - if (fstab[i].fs_mgr_flags & MF_CHECK) { - check_fs(fstab[i].blk_dev, fstab[i].type, fstab[i].mnt_point); + /* Skip raw partition entries such as boot, recovery, etc */ + if (!strcmp(fstab->recs[i].fs_type, "emmc") || + !strcmp(fstab->recs[i].fs_type, "mtd")) { + continue; } - mret = mount(fstab[i].blk_dev, fstab[i].mnt_point, fstab[i].type, - fstab[i].flags, fstab[i].fs_options); + if (fstab->recs[i].fs_mgr_flags & MF_WAIT) { + wait_for_file(fstab->recs[i].blk_device, WAIT_TIMEOUT); + } + + if (fstab->recs[i].fs_mgr_flags & MF_CHECK) { + check_fs(fstab->recs[i].blk_device, fstab->recs[i].fs_type, + fstab->recs[i].mount_point); + } + + mret = mount(fstab->recs[i].blk_device, fstab->recs[i].mount_point, + fstab->recs[i].fs_type, fstab->recs[i].flags, + fstab->recs[i].fs_options); if (!mret) { /* Success! Go get the next one */ continue; } /* mount(2) returned an error, check if it's encrypted and deal with it */ - if ((fstab[i].fs_mgr_flags & MF_CRYPT) && !partition_wiped(fstab[i].blk_dev)) { + if ((fstab->recs[i].fs_mgr_flags & MF_CRYPT) && + !partition_wiped(fstab->recs[i].blk_device)) { /* Need to mount a tmpfs at this mountpoint for now, and set * properties that vold will query later for decrypting */ - if (mount("tmpfs", fstab[i].mnt_point, "tmpfs", + if (mount("tmpfs", fstab->recs[i].mount_point, "tmpfs", MS_NOATIME | MS_NOSUID | MS_NODEV, CRYPTO_TMPFS_OPTIONS) < 0) { ERROR("Cannot mount tmpfs filesystem for encrypted fs at %s\n", - fstab[i].mnt_point); + fstab->recs[i].mount_point); goto out; } encrypted = 1; } else { ERROR("Cannot mount filesystem on %s at %s\n", - fstab[i].blk_dev, fstab[i].mnt_point); + fstab->recs[i].blk_device, fstab->recs[i].mount_point); goto out; } } @@ -497,49 +577,57 @@ int fs_mgr_mount_all(char *fstab_file) } out: - free_fstab(fstab); return ret; } -/* If tmp_mnt_point is non-null, mount the filesystem there. This is for the +/* If tmp_mount_point is non-null, mount the filesystem there. This is for the * tmp mount we do to check the user password */ -int fs_mgr_do_mount(char *fstab_file, char *n_name, char *n_blk_dev, char *tmp_mnt_point) +int fs_mgr_do_mount(struct fstab *fstab, char *n_name, char *n_blk_device, + char *tmp_mount_point) { int i = 0; int ret = -1; - struct fstab_rec *fstab = 0; char *m; - if (!(fstab = read_fstab(fstab_file))) { + if (!fstab) { return ret; } - for (i = 0; fstab[i].blk_dev; i++) { - if (!fs_match(fstab[i].mnt_point, n_name)) { + for (i = 0; i < fstab->num_entries; i++) { + if (!fs_match(fstab->recs[i].mount_point, n_name)) { continue; } /* We found our match */ + /* If this is a raw partition, report an error */ + if (!strcmp(fstab->recs[i].fs_type, "emmc") || + !strcmp(fstab->recs[i].fs_type, "mtd")) { + ERROR("Cannot mount filesystem of type %s on %s\n", + fstab->recs[i].fs_type, n_blk_device); + goto out; + } + /* First check the filesystem if requested */ - if (fstab[i].fs_mgr_flags & MF_WAIT) { - wait_for_file(n_blk_dev, WAIT_TIMEOUT); + if (fstab->recs[i].fs_mgr_flags & MF_WAIT) { + wait_for_file(n_blk_device, WAIT_TIMEOUT); } - if (fstab[i].fs_mgr_flags & MF_CHECK) { - check_fs(n_blk_dev, fstab[i].type, fstab[i].mnt_point); + if (fstab->recs[i].fs_mgr_flags & MF_CHECK) { + check_fs(n_blk_device, fstab->recs[i].fs_type, + fstab->recs[i].mount_point); } /* Now mount it where requested */ - if (tmp_mnt_point) { - m = tmp_mnt_point; + if (tmp_mount_point) { + m = tmp_mount_point; } else { - m = fstab[i].mnt_point; + m = fstab->recs[i].mount_point; } - if (mount(n_blk_dev, m, fstab[i].type, - fstab[i].flags, fstab[i].fs_options)) { + if (mount(n_blk_device, m, fstab->recs[i].fs_type, + fstab->recs[i].flags, fstab->recs[i].fs_options)) { ERROR("Cannot mount filesystem on %s at %s\n", - n_blk_dev, m); + n_blk_device, m); goto out; } else { ret = 0; @@ -548,10 +636,9 @@ int fs_mgr_do_mount(char *fstab_file, char *n_name, char *n_blk_dev, char *tmp_m } /* We didn't find a match, say so and return an error */ - ERROR("Cannot find mount point %s in fstab\n", fstab[i].mnt_point); + ERROR("Cannot find mount point %s in fstab\n", fstab->recs[i].mount_point); out: - free_fstab(fstab); return ret; } @@ -574,65 +661,128 @@ int fs_mgr_do_tmpfs_mount(char *n_name) return 0; } -int fs_mgr_unmount_all(char *fstab_file) +int fs_mgr_unmount_all(struct fstab *fstab) { int i = 0; int ret = 0; - struct fstab_rec *fstab = 0; - if (!(fstab = read_fstab(fstab_file))) { + if (!fstab) { return -1; } - while (fstab[i].blk_dev) { - if (umount(fstab[i].mnt_point)) { - ERROR("Cannot unmount filesystem at %s\n", fstab[i].mnt_point); + while (fstab->recs[i].blk_device) { + if (umount(fstab->recs[i].mount_point)) { + ERROR("Cannot unmount filesystem at %s\n", fstab->recs[i].mount_point); ret = -1; } i++; } - free_fstab(fstab); return ret; } /* * key_loc must be at least PROPERTY_VALUE_MAX bytes long * - * real_blk_dev must be at least PROPERTY_VALUE_MAX bytes long + * real_blk_device must be at least PROPERTY_VALUE_MAX bytes long */ -int fs_mgr_get_crypt_info(char *fstab_file, char *key_loc, char *real_blk_dev, int size) +int fs_mgr_get_crypt_info(struct fstab *fstab, char *key_loc, char *real_blk_device, int size) { int i = 0; - struct fstab_rec *fstab = 0; - if (!(fstab = read_fstab(fstab_file))) { + if (!fstab) { return -1; } /* Initialize return values to null strings */ if (key_loc) { *key_loc = '\0'; } - if (real_blk_dev) { - *real_blk_dev = '\0'; + if (real_blk_device) { + *real_blk_device = '\0'; } /* Look for the encryptable partition to find the data */ - for (i = 0; fstab[i].blk_dev; i++) { - if (!(fstab[i].fs_mgr_flags & MF_CRYPT)) { + for (i = 0; i < fstab->num_entries; i++) { + /* Don't deal with vold managed enryptable partitions here */ + if (fstab->recs[i].fs_mgr_flags & MF_VOLDMANAGED) { + continue; + } + if (!(fstab->recs[i].fs_mgr_flags & MF_CRYPT)) { continue; } /* We found a match */ if (key_loc) { - strlcpy(key_loc, fstab[i].key_loc, size); + strlcpy(key_loc, fstab->recs[i].key_loc, size); } - if (real_blk_dev) { - strlcpy(real_blk_dev, fstab[i].blk_dev, size); + if (real_blk_device) { + strlcpy(real_blk_device, fstab->recs[i].blk_device, size); } break; } - free_fstab(fstab); return 0; } +/* Add an entry to the fstab, and return 0 on success or -1 on error */ +int fs_mgr_add_entry(struct fstab *fstab, + const char *mount_point, const char *fs_type, + const char *blk_device, long long length) +{ + struct fstab_rec *new_fstab_recs; + int n = fstab->num_entries; + + new_fstab_recs = (struct fstab_rec *) + realloc(fstab->recs, sizeof(struct fstab_rec) * (n + 1)); + + if (!new_fstab_recs) { + return -1; + } + + /* A new entry was added, so initialize it */ + memset(&new_fstab_recs[n], 0, sizeof(struct fstab_rec)); + new_fstab_recs[n].mount_point = strdup(mount_point); + new_fstab_recs[n].fs_type = strdup(fs_type); + new_fstab_recs[n].blk_device = strdup(blk_device); + new_fstab_recs[n].length = 0; + + /* Update the fstab struct */ + fstab->recs = new_fstab_recs; + fstab->num_entries++; + + return 0; +} + +struct fstab_rec *fs_mgr_get_entry_for_mount_point(struct fstab *fstab, const char *path) +{ + int i; + + if (!fstab) { + return NULL; + } + + for (i = 0; i < fstab->num_entries; i++) { + int len = strlen(fstab->recs[i].mount_point); + if (strncmp(path, fstab->recs[i].mount_point, len) == 0 && + (path[len] == '\0' || path[len] == '/')) { + return &fstab->recs[i]; + } + } + + return NULL; +} + +int fs_mgr_is_voldmanaged(struct fstab_rec *fstab) +{ + return fstab->fs_mgr_flags & MF_VOLDMANAGED; +} + +int fs_mgr_is_nonremovable(struct fstab_rec *fstab) +{ + return fstab->fs_mgr_flags & MF_NONREMOVABLE; +} + +int fs_mgr_is_encryptable(struct fstab_rec *fstab) +{ + return fstab->fs_mgr_flags & MF_CRYPT; +} + diff --git a/fs_mgr/fs_mgr_main.c b/fs_mgr/fs_mgr_main.c index 81febf1..4bde4a1 100644 --- a/fs_mgr/fs_mgr_main.c +++ b/fs_mgr/fs_mgr_main.c @@ -82,7 +82,8 @@ int main(int argc, char *argv[]) int n_flag=0; char *n_name; char *n_blk_dev; - char *fstab; + char *fstab_file; + struct fstab *fstab; klog_init(); klog_set_level(6); @@ -90,7 +91,9 @@ int main(int argc, char *argv[]) parse_options(argc, argv, &a_flag, &u_flag, &n_flag, &n_name, &n_blk_dev); /* The name of the fstab file is last, after the option */ - fstab = argv[argc - 1]; + fstab_file = argv[argc - 1]; + + fstab = fs_mgr_read_fstab(fstab_file); if (a_flag) { return fs_mgr_mount_all(fstab); @@ -103,6 +106,8 @@ int main(int argc, char *argv[]) exit(1); } + fs_mgr_free_fstab(fstab); + /* Should not get here */ exit(1); } diff --git a/fs_mgr/fs_mgr_priv.h b/fs_mgr/fs_mgr_priv.h index 175fdab..374931b 100644 --- a/fs_mgr/fs_mgr_priv.h +++ b/fs_mgr/fs_mgr_priv.h @@ -25,16 +25,6 @@ #define CRYPTO_TMPFS_OPTIONS "size=128m,mode=0771,uid=1000,gid=1000" -struct fstab_rec { - char *blk_dev; - char *mnt_point; - char *type; - unsigned long flags; - char *fs_options; - int fs_mgr_flags; - char *key_loc; -}; - #define WAIT_TIMEOUT 5 /* fstab has the following format: @@ -59,8 +49,8 @@ struct fstab_rec { * run an fscheck program on the <source> before mounting the filesystem. * If check is specifed on a read-only filesystem, it is ignored. * Also, "encryptable" means that filesystem can be encrypted. - * The "encryptable" flag _MUST_ be followed by a : and a string which - * is the location of the encryption keys. I can either be a path + * The "encryptable" flag _MUST_ be followed by a = and a string which + * is the location of the encryption keys. It can either be a path * to a file or partition which contains the keys, or the word "footer" * which means the keys are in the last 16 Kbytes of the partition * containing the filesystem. @@ -72,9 +62,12 @@ struct fstab_rec { * */ -#define MF_WAIT 0x1 -#define MF_CHECK 0x2 -#define MF_CRYPT 0x4 +#define MF_WAIT 0x1 +#define MF_CHECK 0x2 +#define MF_CRYPT 0x4 +#define MF_NONREMOVABLE 0x8 +#define MF_VOLDMANAGED 0x10 +#define MF_LENGTH 0x20 #endif /* __CORE_FS_MGR_PRIV_H */ diff --git a/fs_mgr/include/fs_mgr.h b/fs_mgr/include/fs_mgr.h index 76abb83..05bcc1b 100644 --- a/fs_mgr/include/fs_mgr.h +++ b/fs_mgr/include/fs_mgr.h @@ -17,11 +17,48 @@ #ifndef __CORE_FS_MGR_H #define __CORE_FS_MGR_H -int fs_mgr_mount_all(char *fstab_file); -int fs_mgr_do_mount(char *fstab_file, char *n_name, char *n_blk_dev, char *tmp_mnt_point); +#ifdef __cplusplus +extern "C" { +#endif + +struct fstab { + int num_entries; + struct fstab_rec *recs; + char *fstab_filename; +}; + +struct fstab_rec { + char *blk_device; + char *mount_point; + char *fs_type; + unsigned long flags; + char *fs_options; + int fs_mgr_flags; + char *key_loc; + long long length; + char *label; + int partnum; +}; + +struct fstab *fs_mgr_read_fstab(const char *fstab_path); +void fs_mgr_free_fstab(struct fstab *fstab); +int fs_mgr_mount_all(struct fstab *fstab); +int fs_mgr_do_mount(struct fstab *fstab, char *n_name, char *n_blk_device, + char *tmp_mount_point); int fs_mgr_do_tmpfs_mount(char *n_name); -int fs_mgr_unmount_all(char *fstab_file); -int fs_mgr_get_crypt_info(char *fstab_file, char *key_loc, char *real_blk_dev, int size); +int fs_mgr_unmount_all(struct fstab *fstab); +int fs_mgr_get_crypt_info(struct fstab *fstab, char *key_loc, + char *real_blk_device, int size); +int fs_mgr_add_entry(struct fstab *fstab, + const char *mount_point, const char *fs_type, + const char *blk_device, long long length); +struct fstab_rec *fs_mgr_get_entry_for_mount_point(struct fstab *fstab, const char *path); +int fs_mgr_is_voldmanaged(struct fstab_rec *fstab); +int fs_mgr_is_nonremovable(struct fstab_rec *fstab); +int fs_mgr_is_encryptable(struct fstab_rec *fstab); +#ifdef __cplusplus +} +#endif #endif /* __CORE_FS_MGR_H */ |