/** * ntfs-3g - Third Generation NTFS Driver * * Copyright (c) 2005-2007 Yura Pakhuchiy * Copyright (c) 2005 Yuval Fledel * Copyright (c) 2006-2009 Szabolcs Szakacsits * Copyright (c) 2007-2021 Jean-Pierre Andre * Copyright (c) 2009 Erik Larsson * * This file is originated from the Linux-NTFS project. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program (in the main directory of the NTFS-3G * distribution in the file COPYING); if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" #include #if !defined(FUSE_VERSION) || (FUSE_VERSION < 26) #error "***********************************************************" #error "* *" #error "* Compilation requires at least FUSE version 2.6.0! *" #error "* *" #error "***********************************************************" #endif #ifdef HAVE_STDIO_H #include #endif #ifdef HAVE_STRING_H #include #endif #ifdef HAVE_ERRNO_H #include #endif #ifdef HAVE_FCNTL_H #include #endif #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_LOCALE_H #include #endif #include #ifdef HAVE_LIMITS_H #include #endif #include #include #ifdef HAVE_SETXATTR #include #endif #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef MAJOR_IN_MKDEV #include #endif #ifdef MAJOR_IN_SYSMACROS #include #endif #if defined(__APPLE__) || defined(__DARWIN__) #include #elif defined(__sun) && defined (__SVR4) #include #endif /* defined(__APPLE__) || defined(__DARWIN__), ... */ #ifndef FUSE_CAP_POSIX_ACL /* until defined in */ #define FUSE_CAP_POSIX_ACL (1 << 18) #endif /* FUSE_CAP_POSIX_ACL */ #include "compat.h" #include "attrib.h" #include "inode.h" #include "volume.h" #include "dir.h" #include "unistr.h" #include "layout.h" #include "index.h" #include "ntfstime.h" #include "security.h" #include "reparse.h" #include "ea.h" #include "object_id.h" #include "efs.h" #include "logging.h" #include "xattrs.h" #include "misc.h" #include "ioctl.h" #include "plugin.h" #include "ntfs-3g_common.h" /* * The following permission checking modes are governed by * the HPERMSCONFIG value in param.h */ /* ACLS may be checked by kernel (requires a fuse patch) or here */ #define KERNELACLS ((HPERMSCONFIG > 6) & (HPERMSCONFIG < 10)) /* basic permissions may be checked by kernel or here */ #define KERNELPERMS (((HPERMSCONFIG - 1) % 6) < 3) /* may want to use fuse/kernel cacheing */ #define CACHEING (!(HPERMSCONFIG % 3)) #if KERNELACLS & !KERNELPERMS #error Incompatible options KERNELACLS and KERNELPERMS #endif /* sometimes the kernel cannot check access */ #define ntfs_real_allowed_access(scx, ni, type) ntfs_allowed_access(scx, ni, type) #if POSIXACLS & KERNELPERMS & !KERNELACLS /* short-circuit if PERMS checked by kernel and ACLs by fs */ #define ntfs_allowed_access(scx, ni, type) \ ((scx)->vol->secure_flags & (1 << SECURITY_DEFAULT) \ ? 1 : ntfs_allowed_access(scx, ni, type)) #endif #define set_archive(ni) (ni)->flags |= FILE_ATTR_ARCHIVE /* * Call a function from a reparse plugin (variable arguments) * Requires "reparse" and "ops" to have been defined * * Returns a non-negative value if successful, * and a negative error code if something fails. */ #define CALL_REPARSE_PLUGIN(ni, op_name, ...) \ (reparse = (REPARSE_POINT*)NULL, \ ops = select_reparse_plugin(ctx, ni, &reparse), \ (!ops ? -errno \ : (ops->op_name ? \ ops->op_name(ni, reparse, __VA_ARGS__) \ : -EOPNOTSUPP))), \ free(reparse) typedef enum { FSTYPE_NONE, FSTYPE_UNKNOWN, FSTYPE_FUSE, FSTYPE_FUSEBLK } fuse_fstype; typedef struct { fuse_fill_dir_t filler; void *buf; } ntfs_fuse_fill_context_t; enum { CLOSE_COMPRESSED = 1, CLOSE_ENCRYPTED = 2, CLOSE_DMTIME = 4, CLOSE_REPARSE = 8 }; static struct ntfs_options opts; const char *EXEC_NAME = "ntfs-3g"; static ntfs_fuse_context_t *ctx; static u32 ntfs_sequence; static const char *usage_msg = "\n" "%s %s %s %d - Third Generation NTFS Driver\n" "\t\tConfiguration type %d, " #ifdef HAVE_SETXATTR "XATTRS are on, " #else "XATTRS are off, " #endif #if POSIXACLS "POSIX ACLS are on\n" #else "POSIX ACLS are off\n" #endif "\n" "Copyright (C) 2005-2007 Yura Pakhuchiy\n" "Copyright (C) 2006-2009 Szabolcs Szakacsits\n" "Copyright (C) 2007-2022 Jean-Pierre Andre\n" "Copyright (C) 2009-2020 Erik Larsson\n" "\n" "Usage: %s [-o option[,...]] \n" "\n" "Options: ro (read-only mount), windows_names, uid=, gid=,\n" " umask=, fmask=, dmask=, streams_interface=.\n" " Please see the details in the manual (type: man ntfs-3g).\n" "\n" "Example: ntfs-3g /dev/sda1 /mnt/windows\n" "\n" #ifdef PLUGIN_DIR "Plugin path: " PLUGIN_DIR "\n\n" #endif /* PLUGIN_DIR */ "%s"; static const char ntfs_bad_reparse[] = "unsupported reparse tag 0x%08lx"; /* exact length of target text, without the terminator */ #define ntfs_bad_reparse_lth (sizeof(ntfs_bad_reparse) + 2) #ifdef FUSE_INTERNAL int drop_privs(void); int restore_privs(void); #else /* * setuid and setgid root ntfs-3g denies to start with external FUSE, * therefore the below functions are no-op in such case. */ static int drop_privs(void) { return 0; } #if defined(linux) || defined(__uClinux__) static int restore_privs(void) { return 0; } #endif static const char *setuid_msg = "Mount is denied because setuid and setgid root ntfs-3g is insecure with the\n" "external FUSE library. Either remove the setuid/setgid bit from the binary\n" "or rebuild NTFS-3G with integrated FUSE support and make it setuid root.\n" "Please see more information at\n" "https://github.com/tuxera/ntfs-3g/wiki/NTFS-3G-FAQ\n"; static const char *unpriv_fuseblk_msg = "Unprivileged user can not mount NTFS block devices using the external FUSE\n" "library. Either mount the volume as root, or rebuild NTFS-3G with integrated\n" "FUSE support and make it setuid root. Please see more information at\n" "https://github.com/tuxera/ntfs-3g/wiki/NTFS-3G-FAQ\n"; #endif /** * ntfs_fuse_is_named_data_stream - check path to be to named data stream * @path: path to check * * Returns 1 if path is to named data stream or 0 otherwise. */ static int ntfs_fuse_is_named_data_stream(const char *path) { if (strchr(path, ':') && ctx->streams == NF_STREAMS_INTERFACE_WINDOWS) return 1; return 0; } static void ntfs_fuse_update_times(ntfs_inode *ni, ntfs_time_update_flags mask) { if (ctx->atime == ATIME_DISABLED) mask &= ~NTFS_UPDATE_ATIME; else if (ctx->atime == ATIME_RELATIVE && mask == NTFS_UPDATE_ATIME && (sle64_to_cpu(ni->last_access_time) >= sle64_to_cpu(ni->last_data_change_time)) && (sle64_to_cpu(ni->last_access_time) >= sle64_to_cpu(ni->last_mft_change_time))) return; ntfs_inode_update_times(ni, mask); } static s64 ntfs_get_nr_free_mft_records(ntfs_volume *vol) { ntfs_attr *na = vol->mftbmp_na; s64 nr_free = ntfs_attr_get_free_bits(na); if (nr_free >= 0) nr_free += (na->allocated_size - na->data_size) << 3; return nr_free; } /* * Fill a security context as needed by security functions * returns TRUE if there is a user mapping, * FALSE if there is none * This is not an error and the context is filled anyway, * it is used for implicit Windows-like inheritance */ static BOOL ntfs_fuse_fill_security_context(struct SECURITY_CONTEXT *scx) { struct fuse_context *fusecontext; scx->vol = ctx->vol; scx->mapping[MAPUSERS] = ctx->security.mapping[MAPUSERS]; scx->mapping[MAPGROUPS] = ctx->security.mapping[MAPGROUPS]; scx->pseccache = &ctx->seccache; fusecontext = fuse_get_context(); scx->uid = fusecontext->uid; scx->gid = fusecontext->gid; scx->tid = fusecontext->pid; #ifdef FUSE_CAP_DONT_MASK /* the umask can be processed by the file system */ scx->umask = fusecontext->umask; #else /* the umask if forced by fuse on creation */ scx->umask = 0; #endif return (ctx->security.mapping[MAPUSERS] != (struct MAPPING*)NULL); } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * Check access to parent directory * * directory and file inodes are only opened when not fed in, * they *HAVE TO* be fed in when already open, however * file inode is only useful when S_ISVTX is requested * * returns 1 if allowed, * 0 if not allowed or some error occurred (errno tells why) */ static int ntfs_allowed_dir_access(struct SECURITY_CONTEXT *scx, const char *path, ntfs_inode *dir_ni, ntfs_inode *ni, mode_t accesstype) { int allowed; ntfs_inode *ni2; ntfs_inode *dir_ni2; char *dirpath; char *name; struct stat stbuf; #if POSIXACLS & KERNELPERMS & !KERNELACLS /* short-circuit if PERMS checked by kernel and ACLs by fs */ if (scx->vol->secure_flags & (1 << SECURITY_DEFAULT)) allowed = 1; else #endif { if (dir_ni) allowed = ntfs_real_allowed_access(scx, dir_ni, accesstype); else { allowed = 0; dirpath = strdup(path); if (dirpath) { /* the root of file system is seen as a parent of itself */ /* is that correct ? */ name = strrchr(dirpath, '/'); *name = 0; dir_ni2 = ntfs_pathname_to_inode(scx->vol, NULL, dirpath); if (dir_ni2) { allowed = ntfs_real_allowed_access(scx, dir_ni2, accesstype); if (ntfs_inode_close(dir_ni2)) allowed = 0; } free(dirpath); } } /* * for a not-owned sticky directory, have to * check whether file itself is owned */ if ((accesstype == (S_IWRITE + S_IEXEC + S_ISVTX)) && (allowed == 2)) { if (ni) ni2 = ni; else ni2 = ntfs_pathname_to_inode(scx->vol, NULL, path); allowed = 0; if (ni2) { allowed = (ntfs_get_owner_mode(scx,ni2,&stbuf) >= 0) && (stbuf.st_uid == scx->uid); if (!ni) ntfs_inode_close(ni2); } } } return (allowed); } #endif #ifdef HAVE_SETXATTR /* extended attributes interface required */ /* * Check access to parent directory * * for non-standard cases where access control cannot be checked by kernel * * no known situations where S_ISVTX is requested * * returns 1 if allowed, * 0 if not allowed or some error occurred (errno tells why) */ static int ntfs_allowed_real_dir_access(struct SECURITY_CONTEXT *scx, const char *path, ntfs_inode *dir_ni, mode_t accesstype) { int allowed; ntfs_inode *dir_ni2; char *dirpath; char *name; if (dir_ni) allowed = ntfs_real_allowed_access(scx, dir_ni, accesstype); else { allowed = 0; dirpath = strdup(path); if (dirpath) { /* the root of file system is seen as a parent of itself */ /* is that correct ? */ name = strrchr(dirpath, '/'); *name = 0; dir_ni2 = ntfs_pathname_to_inode(scx->vol, NULL, dirpath); if (dir_ni2) { allowed = ntfs_real_allowed_access(scx, dir_ni2, accesstype); if (ntfs_inode_close(dir_ni2)) allowed = 0; } free(dirpath); } } return (allowed); } static ntfs_inode *get_parent_dir(const char *path) { ntfs_inode *dir_ni; char *dirpath; char *p; dirpath = strdup(path); dir_ni = (ntfs_inode*)NULL; if (dirpath) { p = strrchr(dirpath,'/'); if (p) { /* always present, be safe */ *p = 0; dir_ni = ntfs_pathname_to_inode(ctx->vol, NULL, dirpath); } free(dirpath); } else errno = ENOMEM; return (dir_ni); } #endif /* HAVE_SETXATTR */ /** * ntfs_fuse_statfs - return information about mounted NTFS volume * @path: ignored (but fuse requires it) * @sfs: statfs structure in which to return the information * * Return information about the mounted NTFS volume @sb in the statfs structure * pointed to by @sfs (this is initialized with zeros before ntfs_statfs is * called). We interpret the values to be correct of the moment in time at * which we are called. Most values are variable otherwise and this isn't just * the free values but the totals as well. For example we can increase the * total number of file nodes if we run out and we can keep doing this until * there is no more space on the volume left at all. * * This code based on ntfs_statfs from ntfs kernel driver. * * Returns 0 on success or -errno on error. */ static int ntfs_fuse_statfs(const char *path __attribute__((unused)), struct statvfs *sfs) { s64 size; int delta_bits; ntfs_volume *vol; vol = ctx->vol; if (!vol) return -ENODEV; /* * File system block size. Used to calculate used/free space by df. * Incorrectly documented as "optimal transfer block size". */ sfs->f_bsize = vol->cluster_size; /* Fundamental file system block size, used as the unit. */ sfs->f_frsize = vol->cluster_size; /* * Total number of blocks on file system in units of f_frsize. * Since inodes are also stored in blocks ($MFT is a file) hence * this is the number of clusters on the volume. */ sfs->f_blocks = vol->nr_clusters; /* Free blocks available for all and for non-privileged processes. */ size = vol->free_clusters; if (size < 0) size = 0; sfs->f_bavail = sfs->f_bfree = size; /* Free inodes on the free space */ delta_bits = vol->cluster_size_bits - vol->mft_record_size_bits; if (delta_bits >= 0) size <<= delta_bits; else size >>= -delta_bits; /* Number of inodes at this point in time. */ sfs->f_files = (vol->mftbmp_na->allocated_size << 3) + size; /* Free inodes available for all and for non-privileged processes. */ size += vol->free_mft_records; if (size < 0) size = 0; sfs->f_ffree = sfs->f_favail = size; /* Maximum length of filenames. */ sfs->f_namemax = NTFS_MAX_NAME_LEN; return 0; } /** * ntfs_fuse_parse_path - split path to path and stream name. * @org_path: path to split * @path: pointer to buffer in which parsed path saved * @stream_name: pointer to buffer where stream name in unicode saved * * This function allocates buffers for @*path and @*stream, user must free them * after use. * * Return values: * <0 Error occurred, return -errno; * 0 No stream name, @*stream is not allocated and set to AT_UNNAMED. * >0 Stream name length in unicode characters. */ static int ntfs_fuse_parse_path(const char *org_path, char **path, ntfschar **stream_name) { char *stream_name_mbs; int res; stream_name_mbs = strdup(org_path); if (!stream_name_mbs) return -errno; if (ctx->streams == NF_STREAMS_INTERFACE_WINDOWS) { *path = strsep(&stream_name_mbs, ":"); if (stream_name_mbs) { *stream_name = NULL; res = ntfs_mbstoucs(stream_name_mbs, stream_name); if (res < 0) { free(*path); *path = NULL; return -errno; } return res; } } else *path = stream_name_mbs; *stream_name = AT_UNNAMED; return 0; } static void set_fuse_error(int *err) { if (!*err) *err = -errno; } #if defined(__APPLE__) || defined(__DARWIN__) static int ntfs_macfuse_getxtimes(const char *org_path, struct timespec *bkuptime, struct timespec *crtime) { int res = 0; ntfs_inode *ni; char *path = NULL; ntfschar *stream_name; int stream_name_len; stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; memset(bkuptime, 0, sizeof(struct timespec)); memset(crtime, 0, sizeof(struct timespec)); ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; goto exit; } /* We have no backup timestamp in NTFS. */ crtime->tv_sec = sle64_to_cpu(ni->creation_time); exit: if (ntfs_inode_close(ni)) set_fuse_error(&res); free(path); if (stream_name_len) free(stream_name); return res; } int ntfs_macfuse_setcrtime(const char *path, const struct timespec *tv) { ntfs_inode *ni; int res = 0; if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; if (tv) { ni->creation_time = cpu_to_sle64(tv->tv_sec); ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); } if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } int ntfs_macfuse_setbkuptime(const char *path, const struct timespec *tv) { ntfs_inode *ni; int res = 0; if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; /* * Only pretending to set backup time successfully to please the APIs of * Mac OS X. In reality, NTFS has no backup time. */ if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } int ntfs_macfuse_setchgtime(const char *path, const struct timespec *tv) { ntfs_inode *ni; int res = 0; if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; if (tv) { ni->last_mft_change_time = cpu_to_sle64(tv->tv_sec); ntfs_fuse_update_times(ni, 0); } if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } #endif /* defined(__APPLE__) || defined(__DARWIN__) */ static void *ntfs_init(struct fuse_conn_info *conn) { #if defined(__APPLE__) || defined(__DARWIN__) FUSE_ENABLE_XTIMES(conn); #endif #ifdef FUSE_CAP_DONT_MASK /* request umask not to be enforced by fuse */ conn->want |= FUSE_CAP_DONT_MASK; #endif /* defined FUSE_CAP_DONT_MASK */ #if POSIXACLS & KERNELACLS /* request ACLs to be checked by kernel */ conn->want |= FUSE_CAP_POSIX_ACL; #endif /* POSIXACLS & KERNELACLS */ #ifdef FUSE_CAP_BIG_WRITES if (ctx->big_writes && ((ctx->vol->nr_clusters << ctx->vol->cluster_size_bits) >= SAFE_CAPACITY_FOR_BIG_WRITES)) conn->want |= FUSE_CAP_BIG_WRITES; #endif #ifdef FUSE_CAP_IOCTL_DIR conn->want |= FUSE_CAP_IOCTL_DIR; #endif /* defined(FUSE_CAP_IOCTL_DIR) */ return NULL; } #ifndef DISABLE_PLUGINS /* * Define attributes for a junction or symlink * (internal plugin) */ static int junction_getattr(ntfs_inode *ni, const REPARSE_POINT *reparse __attribute__((unused)), struct stat *stbuf) { char *target; int res; errno = 0; target = ntfs_make_symlink(ni, ctx->abs_mnt_point); /* * If the reparse point is not a valid * directory junction, and there is no error * we still display as a symlink */ if (target || (errno == EOPNOTSUPP)) { if (target) stbuf->st_size = strlen(target); else stbuf->st_size = ntfs_bad_reparse_lth; stbuf->st_blocks = (ni->allocated_size + 511) >> 9; stbuf->st_mode = S_IFLNK; free(target); res = 0; } else { res = -errno; } return (res); } static int wsl_getattr(ntfs_inode *ni, const REPARSE_POINT *reparse, struct stat *stbuf) { dev_t rdev; int res; res = ntfs_reparse_check_wsl(ni, reparse); if (!res) { switch (reparse->reparse_tag) { case IO_REPARSE_TAG_AF_UNIX : stbuf->st_mode = S_IFSOCK; break; case IO_REPARSE_TAG_LX_FIFO : stbuf->st_mode = S_IFIFO; break; case IO_REPARSE_TAG_LX_CHR : stbuf->st_mode = S_IFCHR; res = ntfs_ea_check_wsldev(ni, &rdev); stbuf->st_rdev = rdev; break; case IO_REPARSE_TAG_LX_BLK : stbuf->st_mode = S_IFBLK; res = ntfs_ea_check_wsldev(ni, &rdev); stbuf->st_rdev = rdev; break; default : stbuf->st_size = ntfs_bad_reparse_lth; stbuf->st_mode = S_IFLNK; break; } } /* * If the reparse point is not a valid wsl special file * we display as a symlink */ if (res) { stbuf->st_size = ntfs_bad_reparse_lth; stbuf->st_mode = S_IFLNK; res = 0; } return (res); } /* * Apply permission masks to st_mode returned by a reparse handler */ static void apply_umask(struct stat *stbuf) { switch (stbuf->st_mode & S_IFMT) { case S_IFREG : stbuf->st_mode &= ~ctx->fmask; break; case S_IFDIR : stbuf->st_mode &= ~ctx->dmask; break; case S_IFLNK : stbuf->st_mode = (stbuf->st_mode & S_IFMT) | 0777; break; default : break; } } #endif /* DISABLE_PLUGINS */ static int ntfs_fuse_getattr(const char *org_path, struct stat *stbuf) { int res = 0; ntfs_inode *ni; ntfs_attr *na; char *path = NULL; ntfschar *stream_name; int stream_name_len; BOOL withusermapping; struct SECURITY_CONTEXT security; stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; memset(stbuf, 0, sizeof(struct stat)); ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; goto exit; } withusermapping = ntfs_fuse_fill_security_context(&security); #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * make sure the parent directory is searchable */ if (withusermapping && !ntfs_allowed_dir_access(&security,path, (!strcmp(org_path,"/") ? ni : (ntfs_inode*)NULL), ni, S_IEXEC)) { res = -EACCES; goto exit; } #endif stbuf->st_nlink = le16_to_cpu(ni->mrec->link_count); if (ctx->posix_nlink && !(ni->flags & FILE_ATTR_REPARSE_POINT)) stbuf->st_nlink = ntfs_dir_link_cnt(ni); if (((ni->mrec->flags & MFT_RECORD_IS_DIRECTORY) || (ni->flags & FILE_ATTR_REPARSE_POINT)) && !stream_name_len) { if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; res = CALL_REPARSE_PLUGIN(ni, getattr, stbuf); if (!res) { apply_umask(stbuf); goto ok; } else { stbuf->st_size = ntfs_bad_reparse_lth; stbuf->st_blocks = (ni->allocated_size + 511) >> 9; stbuf->st_mode = S_IFLNK; res = 0; goto ok; } goto exit; #else /* DISABLE_PLUGINS */ char *target; errno = 0; target = ntfs_make_symlink(ni, ctx->abs_mnt_point); /* * If the reparse point is not a valid * directory junction, and there is no error * we still display as a symlink */ if (target || (errno == EOPNOTSUPP)) { if (target) stbuf->st_size = strlen(target); else stbuf->st_size = ntfs_bad_reparse_lth; stbuf->st_blocks = (ni->allocated_size + 511) >> 9; stbuf->st_nlink = le16_to_cpu(ni->mrec->link_count); stbuf->st_mode = S_IFLNK; free(target); } else { res = -errno; goto exit; } #endif /* DISABLE_PLUGINS */ } else { /* Directory. */ stbuf->st_mode = S_IFDIR | (0777 & ~ctx->dmask); /* get index size, if not known */ if (!test_nino_flag(ni, KnownSize)) { na = ntfs_attr_open(ni, AT_INDEX_ALLOCATION, NTFS_INDEX_I30, 4); if (na) { ni->data_size = na->data_size; ni->allocated_size = na->allocated_size; set_nino_flag(ni, KnownSize); ntfs_attr_close(na); } } stbuf->st_size = ni->data_size; stbuf->st_blocks = ni->allocated_size >> 9; if (!ctx->posix_nlink) stbuf->st_nlink = 1; /* Make find(1) work */ } } else { /* Regular or Interix (INTX) file. */ stbuf->st_mode = S_IFREG; stbuf->st_size = ni->data_size; #ifdef HAVE_SETXATTR /* extended attributes interface required */ /* * return data size rounded to next 512 byte boundary for * encrypted files to include padding required for decryption * also include 2 bytes for padding info */ if (ctx->efs_raw && (ni->flags & FILE_ATTR_ENCRYPTED) && ni->data_size) stbuf->st_size = ((ni->data_size + 511) & ~511) + 2; #endif /* HAVE_SETXATTR */ /* * Temporary fix to make ActiveSync work via Samba 3.0. * See more on the ntfs-3g-devel list. */ stbuf->st_blocks = (ni->allocated_size + 511) >> 9; if (ni->flags & FILE_ATTR_SYSTEM || stream_name_len) { na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len); if (!na) { if (stream_name_len) { res = -ENOENT; goto exit; } else goto nodata; } if (stream_name_len) { stbuf->st_size = na->data_size; stbuf->st_blocks = na->allocated_size >> 9; } /* Check whether it's Interix FIFO or socket. */ if (!(ni->flags & FILE_ATTR_HIDDEN) && !stream_name_len) { /* FIFO. */ if (na->data_size == 0) stbuf->st_mode = S_IFIFO; /* Socket link. */ if (na->data_size == 1) stbuf->st_mode = S_IFSOCK; } #ifdef HAVE_SETXATTR /* extended attributes interface required */ /* encrypted named stream */ /* round size up to next 512 byte boundary */ if (ctx->efs_raw && stream_name_len && (na->data_flags & ATTR_IS_ENCRYPTED) && NAttrNonResident(na)) stbuf->st_size = ((na->data_size+511) & ~511)+2; #endif /* HAVE_SETXATTR */ /* * Check whether it's Interix symbolic link, block or * character device. */ if ((u64)na->data_size <= sizeof(INTX_FILE_TYPES) + sizeof(ntfschar) * PATH_MAX && (u64)na->data_size > sizeof(INTX_FILE_TYPES) && !stream_name_len) { INTX_FILE *intx_file; intx_file = ntfs_malloc(na->data_size); if (!intx_file) { res = -errno; ntfs_attr_close(na); goto exit; } if (ntfs_attr_pread(na, 0, na->data_size, intx_file) != na->data_size) { res = -errno; free(intx_file); ntfs_attr_close(na); goto exit; } if (intx_file->magic == INTX_BLOCK_DEVICE && na->data_size == offsetof( INTX_FILE, device_end)) { stbuf->st_mode = S_IFBLK; stbuf->st_rdev = makedev(le64_to_cpu( intx_file->major), le64_to_cpu( intx_file->minor)); } if (intx_file->magic == INTX_CHARACTER_DEVICE && na->data_size == offsetof( INTX_FILE, device_end)) { stbuf->st_mode = S_IFCHR; stbuf->st_rdev = makedev(le64_to_cpu( intx_file->major), le64_to_cpu( intx_file->minor)); } if (intx_file->magic == INTX_SYMBOLIC_LINK) { char *target = NULL; int len; /* st_size should be set to length of * symlink target as multibyte string */ len = ntfs_ucstombs( intx_file->target, (na->data_size - offsetof(INTX_FILE, target)) / sizeof(ntfschar), &target, 0); if (len < 0) { res = -errno; free(intx_file); ntfs_attr_close(na); goto exit; } free(target); stbuf->st_mode = S_IFLNK; stbuf->st_size = len; } free(intx_file); } ntfs_attr_close(na); } stbuf->st_mode |= (0777 & ~ctx->fmask); } #ifndef DISABLE_PLUGINS ok: #endif /* DISABLE_PLUGINS */ if (withusermapping) { if (ntfs_get_owner_mode(&security,ni,stbuf) < 0) set_fuse_error(&res); } else { stbuf->st_uid = ctx->uid; stbuf->st_gid = ctx->gid; } if (S_ISLNK(stbuf->st_mode)) stbuf->st_mode |= 0777; nodata : stbuf->st_ino = ni->mft_no; #ifdef HAVE_STRUCT_STAT_ST_ATIMESPEC stbuf->st_atimespec = ntfs2timespec(ni->last_access_time); stbuf->st_ctimespec = ntfs2timespec(ni->last_mft_change_time); stbuf->st_mtimespec = ntfs2timespec(ni->last_data_change_time); #elif defined(HAVE_STRUCT_STAT_ST_ATIM) stbuf->st_atim = ntfs2timespec(ni->last_access_time); stbuf->st_ctim = ntfs2timespec(ni->last_mft_change_time); stbuf->st_mtim = ntfs2timespec(ni->last_data_change_time); #elif defined(HAVE_STRUCT_STAT_ST_ATIMENSEC) { struct timespec ts; ts = ntfs2timespec(ni->last_access_time); stbuf->st_atime = ts.tv_sec; stbuf->st_atimensec = ts.tv_nsec; ts = ntfs2timespec(ni->last_mft_change_time); stbuf->st_ctime = ts.tv_sec; stbuf->st_ctimensec = ts.tv_nsec; ts = ntfs2timespec(ni->last_data_change_time); stbuf->st_mtime = ts.tv_sec; stbuf->st_mtimensec = ts.tv_nsec; } #else #warning "No known way to set nanoseconds in struct stat !" { struct timespec ts; ts = ntfs2timespec(ni->last_access_time); stbuf->st_atime = ts.tv_sec; ts = ntfs2timespec(ni->last_mft_change_time); stbuf->st_ctime = ts.tv_sec; ts = ntfs2timespec(ni->last_data_change_time); stbuf->st_mtime = ts.tv_sec; } #endif exit: if (ntfs_inode_close(ni)) set_fuse_error(&res); free(path); if (stream_name_len) free(stream_name); return res; } #ifndef DISABLE_PLUGINS /* * Get the link defined by a junction or symlink * (internal plugin) */ static int junction_readlink(ntfs_inode *ni, const REPARSE_POINT *reparse __attribute__((unused)), char **pbuf) { int res; le32 tag; int lth; errno = 0; res = 0; *pbuf = ntfs_make_symlink(ni, ctx->abs_mnt_point); if (!*pbuf) { if (errno == EOPNOTSUPP) { *pbuf = (char*)ntfs_malloc(ntfs_bad_reparse_lth + 1); if (*pbuf) { if (reparse) tag = reparse->reparse_tag; else tag = const_cpu_to_le32(0); lth = snprintf(*pbuf, ntfs_bad_reparse_lth + 1, ntfs_bad_reparse, (long)le32_to_cpu(tag)); if (lth != ntfs_bad_reparse_lth) { free(*pbuf); *pbuf = (char*)NULL; res = -errno; } } else res = -ENOMEM; } else res = -errno; } return (res); } #endif /* DISABLE_PLUGINS */ static int ntfs_fuse_readlink(const char *org_path, char *buf, size_t buf_size) { char *path = NULL; ntfschar *stream_name; ntfs_inode *ni = NULL; ntfs_attr *na = NULL; INTX_FILE *intx_file = NULL; int stream_name_len, res = 0; REPARSE_POINT *reparse; le32 tag; int lth; /* Get inode. */ stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; if (stream_name_len > 0) { res = -EINVAL; goto exit; } ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; goto exit; } /* * Reparse point : analyze as a junction point */ if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS char *gotlink; const plugin_operations_t *ops; gotlink = (char*)NULL; res = CALL_REPARSE_PLUGIN(ni, readlink, &gotlink); if (gotlink) { strncpy(buf, gotlink, buf_size); free(gotlink); res = 0; } else { errno = EOPNOTSUPP; res = -EOPNOTSUPP; } #else /* DISABLE_PLUGINS */ char *target; errno = 0; res = 0; target = ntfs_make_symlink(ni, ctx->abs_mnt_point); if (target) { strncpy(buf,target,buf_size); free(target); } else res = -errno; #endif /* DISABLE_PLUGINS */ if (res == -EOPNOTSUPP) { reparse = ntfs_get_reparse_point(ni); if (reparse) { tag = reparse->reparse_tag; free(reparse); } else tag = const_cpu_to_le32(0); lth = snprintf(buf, ntfs_bad_reparse_lth + 1, ntfs_bad_reparse, (long)le32_to_cpu(tag)); res = 0; if (lth != ntfs_bad_reparse_lth) res = -errno; } goto exit; } /* Sanity checks. */ if (!(ni->flags & FILE_ATTR_SYSTEM)) { res = -EINVAL; goto exit; } na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0); if (!na) { res = -errno; goto exit; } if ((size_t)na->data_size <= sizeof(INTX_FILE_TYPES)) { res = -EINVAL; goto exit; } if ((size_t)na->data_size > sizeof(INTX_FILE_TYPES) + sizeof(ntfschar) * PATH_MAX) { res = -ENAMETOOLONG; goto exit; } /* Receive file content. */ intx_file = ntfs_malloc(na->data_size); if (!intx_file) { res = -errno; goto exit; } if (ntfs_attr_pread(na, 0, na->data_size, intx_file) != na->data_size) { res = -errno; goto exit; } /* Sanity check. */ if (intx_file->magic != INTX_SYMBOLIC_LINK) { res = -EINVAL; goto exit; } /* Convert link from unicode to local encoding. */ if (ntfs_ucstombs(intx_file->target, (na->data_size - offsetof(INTX_FILE, target)) / sizeof(ntfschar), &buf, buf_size) < 0) { res = -errno; goto exit; } exit: if (intx_file) free(intx_file); if (na) ntfs_attr_close(na); if (ntfs_inode_close(ni)) set_fuse_error(&res); free(path); if (stream_name_len) free(stream_name); return res; } static int ntfs_fuse_filler(ntfs_fuse_fill_context_t *fill_ctx, const ntfschar *name, const int name_len, const int name_type, const s64 pos __attribute__((unused)), const MFT_REF mref, const unsigned dt_type __attribute__((unused))) { char *filename = NULL; int ret = 0; int filenamelen = -1; if (name_type == FILE_NAME_DOS) return 0; if ((filenamelen = ntfs_ucstombs(name, name_len, &filename, 0)) < 0) { ntfs_log_perror("Filename decoding failed (inode %llu)", (unsigned long long)MREF(mref)); return -1; } if (ntfs_fuse_is_named_data_stream(filename)) { ntfs_log_error("Unable to access '%s' (inode %llu) with " "current named streams access interface.\n", filename, (unsigned long long)MREF(mref)); free(filename); return 0; } else { struct stat st = { .st_ino = MREF(mref) }; #ifndef DISABLE_PLUGINS ntfs_inode *ni; #endif /* DISABLE_PLUGINS */ switch (dt_type) { case NTFS_DT_DIR : st.st_mode = S_IFDIR | (0777 & ~ctx->dmask); break; case NTFS_DT_LNK : st.st_mode = S_IFLNK | 0777; break; case NTFS_DT_FIFO : st.st_mode = S_IFIFO; break; case NTFS_DT_SOCK : st.st_mode = S_IFSOCK; break; case NTFS_DT_BLK : st.st_mode = S_IFBLK; break; case NTFS_DT_CHR : st.st_mode = S_IFCHR; break; case NTFS_DT_REPARSE : st.st_mode = S_IFLNK | 0777; /* default */ #ifndef DISABLE_PLUGINS /* get emulated type from plugin if available */ ni = ntfs_inode_open(ctx->vol, mref); if (ni && (ni->flags & FILE_ATTR_REPARSE_POINT)) { const plugin_operations_t *ops; REPARSE_POINT *reparse; int res; res = CALL_REPARSE_PLUGIN(ni, getattr, &st); if (!res) apply_umask(&st); else st.st_mode = S_IFLNK; } if (ni) ntfs_inode_close(ni); #endif /* DISABLE_PLUGINS */ break; default : /* unexpected types shown as plain files */ case NTFS_DT_REG : st.st_mode = S_IFREG | (0777 & ~ctx->fmask); break; } #if defined(__APPLE__) || defined(__DARWIN__) /* * Returning file names larger than MAXNAMLEN (255) bytes * causes Darwin/Mac OS X to bug out and skip the entry. */ if (filenamelen > MAXNAMLEN) { ntfs_log_debug("Truncating %d byte filename to " "%d bytes.\n", filenamelen, MAXNAMLEN); ntfs_log_debug(" before: '%s'\n", filename); memset(filename + MAXNAMLEN, 0, filenamelen - MAXNAMLEN); ntfs_log_debug(" after: '%s'\n", filename); } #elif defined(__sun) && defined (__SVR4) /* * Returning file names larger than MAXNAMELEN (256) bytes * causes Solaris/Illumos to return an I/O error from the system * call. * However we also need space for a terminating NULL, or user * space tools will bug out since they expect a NULL terminator. * Effectively the maximum length of a file name is MAXNAMELEN - * 1 (255). */ if (filenamelen > (MAXNAMELEN - 1)) { ntfs_log_debug("Truncating %d byte filename to %d " "bytes.\n", filenamelen, MAXNAMELEN - 1); ntfs_log_debug(" before: '%s'\n", filename); memset(&filename[MAXNAMELEN - 1], 0, filenamelen - (MAXNAMELEN - 1)); ntfs_log_debug(" after: '%s'\n", filename); } #endif /* defined(__APPLE__) || defined(__DARWIN__), ... */ ret = fill_ctx->filler(fill_ctx->buf, filename, &st, 0); } free(filename); return ret; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) static int ntfs_fuse_opendir(const char *path, struct fuse_file_info *fi) { int res = 0; ntfs_inode *ni; int accesstype; struct SECURITY_CONTEXT security; if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (ni) { if (ntfs_fuse_fill_security_context(&security)) { if (fi->flags & O_WRONLY) accesstype = S_IWRITE; else if (fi->flags & O_RDWR) accesstype = S_IWRITE | S_IREAD; else accesstype = S_IREAD; /* * directory must be searchable * and requested access be allowed */ if (!strcmp(path,"/") ? !ntfs_allowed_dir_access(&security, path, ni, ni, accesstype | S_IEXEC) : !ntfs_allowed_dir_access(&security, path, (ntfs_inode*)NULL, ni, S_IEXEC) || !ntfs_allowed_access(&security, ni,accesstype)) res = -EACCES; } if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; fi->fh = 0; res = CALL_REPARSE_PLUGIN(ni, opendir, fi); #else /* DISABLE_PLUGINS */ res = -EOPNOTSUPP; #endif /* DISABLE_PLUGINS */ } if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; return res; } #endif static int ntfs_fuse_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset __attribute__((unused)), struct fuse_file_info *fi __attribute__((unused))) { ntfs_fuse_fill_context_t fill_ctx; ntfs_inode *ni; s64 pos = 0; int err = 0; fill_ctx.filler = filler; fill_ctx.buf = buf; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; err = CALL_REPARSE_PLUGIN(ni, readdir, &pos, &fill_ctx, (ntfs_filldir_t)ntfs_fuse_filler, fi); #else /* DISABLE_PLUGINS */ err = -EOPNOTSUPP; #endif /* DISABLE_PLUGINS */ } else { if (ntfs_readdir(ni, &pos, &fill_ctx, (ntfs_filldir_t)ntfs_fuse_filler)) err = -errno; } ntfs_fuse_update_times(ni, NTFS_UPDATE_ATIME); if (ntfs_inode_close(ni)) set_fuse_error(&err); return err; } static int ntfs_fuse_open(const char *org_path, #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct fuse_file_info *fi) #else struct fuse_file_info *fi __attribute__((unused))) #endif { ntfs_inode *ni; ntfs_attr *na = NULL; int res = 0; char *path = NULL; ntfschar *stream_name; int stream_name_len; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) int accesstype; struct SECURITY_CONTEXT security; #endif stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (ni) { if (!(ni->flags & FILE_ATTR_REPARSE_POINT)) { na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len); if (!na) { res = -errno; goto close; } } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) if (ntfs_fuse_fill_security_context(&security)) { if (fi->flags & O_WRONLY) accesstype = S_IWRITE; else if (fi->flags & O_RDWR) accesstype = S_IWRITE | S_IREAD; else accesstype = S_IREAD; /* * directory must be searchable * and requested access allowed */ if (!ntfs_allowed_dir_access(&security, path,(ntfs_inode*)NULL,ni,S_IEXEC) || !ntfs_allowed_access(&security, ni,accesstype)) res = -EACCES; } #endif if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; fi->fh = 0; res = CALL_REPARSE_PLUGIN(ni, open, fi); #else /* DISABLE_PLUGINS */ res = -EOPNOTSUPP; #endif /* DISABLE_PLUGINS */ goto close; } if ((res >= 0) && (fi->flags & (O_WRONLY | O_RDWR))) { /* mark a future need to compress the last chunk */ if (na->data_flags & ATTR_COMPRESSION_MASK) fi->fh |= CLOSE_COMPRESSED; #ifdef HAVE_SETXATTR /* extended attributes interface required */ /* mark a future need to fixup encrypted inode */ if (ctx->efs_raw && !(na->data_flags & ATTR_IS_ENCRYPTED) && (ni->flags & FILE_ATTR_ENCRYPTED)) fi->fh |= CLOSE_ENCRYPTED; #endif /* HAVE_SETXATTR */ /* mark a future need to update the mtime */ if (ctx->dmtime) fi->fh |= CLOSE_DMTIME; /* deny opening metadata files for writing */ if (ni->mft_no < FILE_first_user) res = -EPERM; } ntfs_attr_close(na); close: if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; free(path); if (stream_name_len) free(stream_name); return res; } static int ntfs_fuse_read(const char *org_path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi __attribute__((unused))) { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; char *path = NULL; ntfschar *stream_name; int stream_name_len, res; s64 total = 0; s64 max_read; if (!size) return 0; stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; goto exit; } if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; if (stream_name_len || !fi) { res = -EINVAL; goto exit; } res = CALL_REPARSE_PLUGIN(ni, read, buf, size, offset, fi); if (res >= 0) { goto stamps; } #else /* DISABLE_PLUGINS */ res = -EOPNOTSUPP; #endif /* DISABLE_PLUGINS */ goto exit; } na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len); if (!na) { res = -errno; goto exit; } max_read = na->data_size; #ifdef HAVE_SETXATTR /* extended attributes interface required */ /* limit reads at next 512 byte boundary for encrypted attributes */ if (ctx->efs_raw && max_read && (na->data_flags & ATTR_IS_ENCRYPTED) && NAttrNonResident(na)) { max_read = ((na->data_size+511) & ~511) + 2; } #endif /* HAVE_SETXATTR */ if (offset + (off_t)size > max_read) { if (max_read < offset) goto ok; size = max_read - offset; } while (size > 0) { s64 ret = ntfs_attr_pread(na, offset, size, buf + total); if (ret != (s64)size) ntfs_log_perror("ntfs_attr_pread error reading '%s' at " "offset %lld: %lld <> %lld", org_path, (long long)offset, (long long)size, (long long)ret); if (ret <= 0 || ret > (s64)size) { res = (ret < 0) ? -errno : -EIO; goto exit; } size -= ret; offset += ret; total += ret; } ok: res = total; #ifndef DISABLE_PLUGINS stamps: #endif /* DISABLE_PLUGINS */ ntfs_fuse_update_times(ni, NTFS_UPDATE_ATIME); exit: if (na) ntfs_attr_close(na); if (ntfs_inode_close(ni)) set_fuse_error(&res); free(path); if (stream_name_len) free(stream_name); return res; } static int ntfs_fuse_write(const char *org_path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi __attribute__((unused))) { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; char *path = NULL; ntfschar *stream_name; int stream_name_len, res, total = 0; stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) { res = stream_name_len; goto out; } ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; goto exit; } if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; if (stream_name_len || !fi) { res = -EINVAL; goto exit; } res = CALL_REPARSE_PLUGIN(ni, write, buf, size, offset, fi); if (res >= 0) { goto stamps; } #else /* DISABLE_PLUGINS */ res = -EOPNOTSUPP; #endif /* DISABLE_PLUGINS */ goto exit; } na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len); if (!na) { res = -errno; goto exit; } while (size) { s64 ret = ntfs_attr_pwrite(na, offset, size, buf + total); if (ret <= 0) { res = -errno; goto exit; } size -= ret; offset += ret; total += ret; } res = total; #ifndef DISABLE_PLUGINS stamps: #endif /* DISABLE_PLUGINS */ if ((res > 0) && (!ctx->dmtime || (sle64_to_cpu(ntfs_current_time()) - sle64_to_cpu(ni->last_data_change_time)) > ctx->dmtime)) ntfs_fuse_update_times(ni, NTFS_UPDATE_MCTIME); exit: if (na) ntfs_attr_close(na); if (res > 0) set_archive(ni); if (ntfs_inode_close(ni)) set_fuse_error(&res); free(path); if (stream_name_len) free(stream_name); out: return res; } static int ntfs_fuse_release(const char *org_path, struct fuse_file_info *fi) { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; char *path = NULL; ntfschar *stream_name; int stream_name_len, res; if (!fi) { res = -EINVAL; goto out; } /* Only for marked descriptors there is something to do */ if (!fi->fh) { res = 0; goto out; } stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) { res = stream_name_len; goto out; } ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; goto exit; } if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; if (stream_name_len) { res = -EINVAL; goto exit; } res = CALL_REPARSE_PLUGIN(ni, release, fi); if (!res) { goto stamps; } #else /* DISABLE_PLUGINS */ /* Assume release() was not needed */ res = 0; #endif /* DISABLE_PLUGINS */ goto exit; } na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len); if (!na) { res = -errno; goto exit; } res = 0; if (fi->fh & CLOSE_COMPRESSED) res = ntfs_attr_pclose(na); #ifdef HAVE_SETXATTR /* extended attributes interface required */ if (fi->fh & CLOSE_ENCRYPTED) res = ntfs_efs_fixup_attribute(NULL, na); #endif /* HAVE_SETXATTR */ #ifndef DISABLE_PLUGINS stamps: #endif /* DISABLE_PLUGINS */ if (fi->fh & CLOSE_DMTIME) ntfs_inode_update_times(ni,NTFS_UPDATE_MCTIME); exit: if (na) ntfs_attr_close(na); if (ntfs_inode_close(ni)) set_fuse_error(&res); free(path); if (stream_name_len) free(stream_name); out: return res; } /* * Common part for truncate() and ftruncate() */ static int ntfs_fuse_trunc(const char *org_path, off_t size, #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) BOOL chkwrite) #else BOOL chkwrite __attribute__((unused))) #endif { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; int res; char *path = NULL; ntfschar *stream_name; int stream_name_len; s64 oldsize; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) goto exit; /* deny truncating metadata files */ if (ni->mft_no < FILE_first_user) { errno = EPERM; goto exit; } if (ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; if (stream_name_len) { res = -EINVAL; goto exit; } res = CALL_REPARSE_PLUGIN(ni, truncate, size); if (!res) { set_archive(ni); goto stamps; } #else /* DISABLE_PLUGINS */ res = -EOPNOTSUPP; #endif /* DISABLE_PLUGINS */ goto exit; } na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len); if (!na) goto exit; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * JPA deny truncation if cannot search in parent directory * or cannot write to file (already checked for ftruncate()) */ if (ntfs_fuse_fill_security_context(&security) && (!ntfs_allowed_dir_access(&security, path, (ntfs_inode*)NULL, ni, S_IEXEC) || (chkwrite && !ntfs_allowed_access(&security, ni, S_IWRITE)))) { errno = EACCES; goto exit; } #endif /* * For compressed files, upsizing is done by inserting a final * zero, which is optimized as creating a hole when possible. */ oldsize = na->data_size; if ((na->data_flags & ATTR_COMPRESSION_MASK) && (size > na->initialized_size)) { char zero = 0; if (ntfs_attr_pwrite(na, size - 1, 1, &zero) <= 0) goto exit; } else if (ntfs_attr_truncate(na, size)) goto exit; if (oldsize != size) set_archive(ni); #ifndef DISABLE_PLUGINS stamps: #endif /* DISABLE_PLUGINS */ ntfs_fuse_update_times(ni, NTFS_UPDATE_MCTIME); errno = 0; exit: res = -errno; ntfs_attr_close(na); if (ntfs_inode_close(ni)) set_fuse_error(&res); free(path); if (stream_name_len) free(stream_name); return res; } static int ntfs_fuse_truncate(const char *org_path, off_t size) { return ntfs_fuse_trunc(org_path, size, TRUE); } static int ntfs_fuse_ftruncate(const char *org_path, off_t size, struct fuse_file_info *fi __attribute__((unused))) { /* * in ->ftruncate() the file handle is guaranteed * to have been opened for write. */ return (ntfs_fuse_trunc(org_path, size, FALSE)); } static int ntfs_fuse_chmod(const char *path, mode_t mode) { int res = 0; ntfs_inode *ni; struct SECURITY_CONTEXT security; if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ /* * Return unsupported if no user mapping has been defined * or enforcing Windows-type inheritance */ if (ctx->inherit || !ntfs_fuse_fill_security_context(&security)) { if (ctx->silent) res = 0; else res = -EOPNOTSUPP; } else { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_allowed_dir_access(&security,path, (ntfs_inode*)NULL,(ntfs_inode*)NULL,S_IEXEC)) { #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) res = -errno; else { if (ntfs_set_mode(&security,ni,mode)) res = -errno; else ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); NInoSetDirty(ni); if (ntfs_inode_close(ni)) set_fuse_error(&res); } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) } else res = -errno; #endif } return res; } static int ntfs_fuse_chown(const char *path, uid_t uid, gid_t gid) { ntfs_inode *ni; int res; struct SECURITY_CONTEXT security; if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ /* * Return unsupported if no user mapping has been defined * or enforcing Windows-type inheritance */ if (ctx->inherit || !ntfs_fuse_fill_security_context(&security)) { if (ctx->silent) return 0; if (uid == ctx->uid && gid == ctx->gid) return 0; return -EOPNOTSUPP; } else { res = 0; if (((int)uid != -1) || ((int)gid != -1)) { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_allowed_dir_access(&security,path, (ntfs_inode*)NULL,(ntfs_inode*)NULL,S_IEXEC)) { #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) res = -errno; else { if (ntfs_set_owner(&security, ni,uid,gid)) res = -errno; else ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); if (ntfs_inode_close(ni)) set_fuse_error(&res); } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) } else res = -errno; #endif } } return (res); } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) static int ntfs_fuse_access(const char *path, int type) { int res = 0; int mode; ntfs_inode *ni; struct SECURITY_CONTEXT security; if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ /* JPA return unsupported if no user mapping has been defined */ if (!ntfs_fuse_fill_security_context(&security)) { if (ctx->silent) res = 0; else res = -EOPNOTSUPP; } else { /* parent directory must be seachable */ if (ntfs_allowed_dir_access(&security,path,(ntfs_inode*)NULL, (ntfs_inode*)NULL,S_IEXEC)) { ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; } else { mode = 0; if (type & (X_OK | W_OK | R_OK)) { if (type & X_OK) mode += S_IEXEC; if (type & W_OK) mode += S_IWRITE; if (type & R_OK) mode += S_IREAD; if (!ntfs_allowed_access(&security, ni, mode)) res = -errno; } if (ntfs_inode_close(ni)) set_fuse_error(&res); } } else res = -errno; } return (res); } #endif static int ntfs_fuse_create(const char *org_path, mode_t typemode, dev_t dev, const char *target, struct fuse_file_info *fi) { char *name; ntfschar *uname = NULL, *utarget = NULL; ntfs_inode *dir_ni = NULL, *ni; char *dir_path; le32 securid; char *path = NULL; gid_t gid; mode_t dsetgid; ntfschar *stream_name; int stream_name_len; mode_t type = typemode & ~07777; mode_t perm; struct SECURITY_CONTEXT security; int res = 0, uname_len, utarget_len; dir_path = strdup(org_path); if (!dir_path) return -errno; /* Generate unicode filename. */ name = strrchr(dir_path, '/'); name++; uname_len = ntfs_mbstoucs(name, &uname); if ((uname_len < 0) || (ctx->windows_names && ntfs_forbidden_names(ctx->vol,uname,uname_len,TRUE))) { res = -errno; goto exit; } stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); /* stream name validity has been checked previously */ if (stream_name_len < 0) { res = stream_name_len; goto exit; } /* Open parent directory. */ *--name = 0; dir_ni = ntfs_pathname_to_inode(ctx->vol, NULL, dir_path); /* Deny creating files in $Extend */ if (!dir_ni || (dir_ni->mft_no == FILE_Extend)) { free(path); res = -errno; if (dir_ni) res = -EPERM; goto exit; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* make sure parent directory is writeable and executable */ if (!ntfs_fuse_fill_security_context(&security) || ntfs_allowed_create(&security, dir_ni, &gid, &dsetgid)) { #else ntfs_fuse_fill_security_context(&security); ntfs_allowed_create(&security, dir_ni, &gid, &dsetgid); #endif if (S_ISDIR(type)) perm = (typemode & ~ctx->dmask & 0777) | (dsetgid & S_ISGID); else if ((ctx->special_files == NTFS_FILES_WSL) && S_ISLNK(type)) perm = typemode | 0777; else perm = typemode & ~ctx->fmask & 0777; /* * Try to get a security id available for * file creation (from inheritance or argument). * This is not possible for NTFS 1.x, and we will * have to build a security attribute later. */ if (!ctx->security.mapping[MAPUSERS]) securid = const_cpu_to_le32(0); else if (ctx->inherit) securid = ntfs_inherited_id(&security, dir_ni, S_ISDIR(type)); else #if POSIXACLS securid = ntfs_alloc_securid(&security, security.uid, gid, dir_ni, perm, S_ISDIR(type)); #else securid = ntfs_alloc_securid(&security, security.uid, gid, perm & ~security.umask, S_ISDIR(type)); #endif /* Create object specified in @type. */ if (dir_ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; reparse = (REPARSE_POINT*)NULL; ops = select_reparse_plugin(ctx, dir_ni, &reparse); if (ops && ops->create) { ni = (*ops->create)(dir_ni, reparse, securid, uname, uname_len, type); } else { ni = (ntfs_inode*)NULL; errno = EOPNOTSUPP; } free(reparse); #else /* DISABLE_PLUGINS */ errno = EOPNOTSUPP; #endif /* DISABLE_PLUGINS */ } else { switch (type) { case S_IFCHR: case S_IFBLK: ni = ntfs_create_device(dir_ni, securid, uname, uname_len, type, dev); break; case S_IFLNK: utarget_len = ntfs_mbstoucs(target, &utarget); if (utarget_len < 0) { res = -errno; goto exit; } ni = ntfs_create_symlink(dir_ni, securid, uname, uname_len, utarget, utarget_len); break; default: ni = ntfs_create(dir_ni, securid, uname, uname_len, type); break; } } if (ni) { /* * set the security attribute if a security id * could not be allocated (eg NTFS 1.x) */ if (ctx->security.mapping[MAPUSERS]) { #if POSIXACLS if (!securid && ntfs_set_inherited_posix(&security, ni, security.uid, gid, dir_ni, perm) < 0) set_fuse_error(&res); #else if (!securid && ntfs_set_owner_mode(&security, ni, security.uid, gid, perm & ~security.umask) < 0) set_fuse_error(&res); #endif } set_archive(ni); /* mark a need to compress the end of file */ if (fi && (ni->flags & FILE_ATTR_COMPRESSED)) { fi->fh |= CLOSE_COMPRESSED; } #ifdef HAVE_SETXATTR /* extended attributes interface required */ /* mark a future need to fixup encrypted inode */ if (fi && ctx->efs_raw && (ni->flags & FILE_ATTR_ENCRYPTED)) fi->fh |= CLOSE_ENCRYPTED; #endif /* HAVE_SETXATTR */ /* mark a need to update the mtime */ if (fi && ctx->dmtime) fi->fh |= CLOSE_DMTIME; NInoSetDirty(ni); /* * closing ni requires access to dir_ni to * synchronize the index, avoid double opening. */ if (ntfs_inode_close_in_dir(ni, dir_ni)) set_fuse_error(&res); ntfs_fuse_update_times(dir_ni, NTFS_UPDATE_MCTIME); } else res = -errno; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) } else res = -errno; #endif free(path); exit: free(uname); if (ntfs_inode_close(dir_ni)) set_fuse_error(&res); if (utarget) free(utarget); free(dir_path); return res; } static int ntfs_fuse_create_stream(const char *path, ntfschar *stream_name, const int stream_name_len, struct fuse_file_info *fi) { ntfs_inode *ni; int res = 0; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; if (res == -ENOENT) { /* * If such file does not exist, create it and try once * again to add stream to it. * Note : no fuse_file_info for creation of main file */ res = ntfs_fuse_create(path, S_IFREG, 0, NULL, (struct fuse_file_info*)NULL); if (!res) return ntfs_fuse_create_stream(path, stream_name, stream_name_len,fi); else res = -errno; } return res; } if (ntfs_attr_add(ni, AT_DATA, stream_name, stream_name_len, NULL, 0)) res = -errno; else set_archive(ni); if ((res >= 0) && fi && (fi->flags & (O_WRONLY | O_RDWR))) { /* mark a future need to compress the last block */ if (ni->flags & FILE_ATTR_COMPRESSED) fi->fh |= CLOSE_COMPRESSED; #ifdef HAVE_SETXATTR /* extended attributes interface required */ /* mark a future need to fixup encrypted inode */ if (ctx->efs_raw && (ni->flags & FILE_ATTR_ENCRYPTED)) fi->fh |= CLOSE_ENCRYPTED; #endif /* HAVE_SETXATTR */ if (ctx->dmtime) fi->fh |= CLOSE_DMTIME; } if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } static int ntfs_fuse_mknod_common(const char *org_path, mode_t mode, dev_t dev, struct fuse_file_info *fi) { char *path = NULL; ntfschar *stream_name; int stream_name_len; int res = 0; stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; if (stream_name_len && (!S_ISREG(mode) || (ctx->windows_names && ntfs_forbidden_names(ctx->vol,stream_name, stream_name_len, TRUE)))) { res = -EINVAL; goto exit; } if (!stream_name_len) res = ntfs_fuse_create(path, mode & (S_IFMT | 07777), dev, NULL,fi); else res = ntfs_fuse_create_stream(path, stream_name, stream_name_len,fi); exit: free(path); if (stream_name_len) free(stream_name); return res; } static int ntfs_fuse_mknod(const char *path, mode_t mode, dev_t dev) { return ntfs_fuse_mknod_common(path, mode, dev, (struct fuse_file_info*)NULL); } static int ntfs_fuse_create_file(const char *path, mode_t mode, struct fuse_file_info *fi) { return ntfs_fuse_mknod_common(path, mode, 0, fi); } static int ntfs_fuse_symlink(const char *to, const char *from) { if (ntfs_fuse_is_named_data_stream(from)) return -EINVAL; /* n/a for named data streams. */ return ntfs_fuse_create(from, S_IFLNK, 0, to, (struct fuse_file_info*)NULL); } static int ntfs_fuse_link(const char *old_path, const char *new_path) { char *name; ntfschar *uname = NULL; ntfs_inode *dir_ni = NULL, *ni; char *path; int res = 0, uname_len; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) BOOL samedir; struct SECURITY_CONTEXT security; #endif if (ntfs_fuse_is_named_data_stream(old_path)) return -EINVAL; /* n/a for named data streams. */ if (ntfs_fuse_is_named_data_stream(new_path)) return -EINVAL; /* n/a for named data streams. */ path = strdup(new_path); if (!path) return -errno; /* Open file for which create hard link. */ ni = ntfs_pathname_to_inode(ctx->vol, NULL, old_path); if (!ni) { res = -errno; goto exit; } /* Generate unicode filename. */ name = strrchr(path, '/'); name++; uname_len = ntfs_mbstoucs(name, &uname); if ((uname_len < 0) || (ctx->windows_names && ntfs_forbidden_names(ctx->vol,uname,uname_len,TRUE))) { res = -errno; goto exit; } /* Open parent directory. */ *--name = 0; dir_ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!dir_ni) { res = -errno; goto exit; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) samedir = !strncmp(old_path, path, strlen(path)) && (old_path[strlen(path)] == '/'); /* JPA make sure the parent directories are writeable */ if (ntfs_fuse_fill_security_context(&security) && ((!samedir && !ntfs_allowed_dir_access(&security,old_path, (ntfs_inode*)NULL,ni,S_IWRITE + S_IEXEC)) || !ntfs_allowed_access(&security,dir_ni,S_IWRITE + S_IEXEC))) res = -EACCES; else #endif { if (dir_ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; res = CALL_REPARSE_PLUGIN(dir_ni, link, ni, uname, uname_len); #else /* DISABLE_PLUGINS */ errno = EOPNOTSUPP; res = -errno; #endif /* DISABLE_PLUGINS */ if (res) goto exit; } else if (ntfs_link(ni, dir_ni, uname, uname_len)) { res = -errno; goto exit; } set_archive(ni); ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); ntfs_fuse_update_times(dir_ni, NTFS_UPDATE_MCTIME); } exit: /* * Must close dir_ni first otherwise ntfs_inode_sync_file_name(ni) * may fail because ni may not be in parent's index on the disk yet. */ if (ntfs_inode_close(dir_ni)) set_fuse_error(&res); if (ntfs_inode_close(ni)) set_fuse_error(&res); free(uname); free(path); return res; } static int ntfs_fuse_rm(const char *org_path) { char *name; ntfschar *uname = NULL; ntfs_inode *dir_ni = NULL, *ni; char *path; int res = 0, uname_len; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif path = strdup(org_path); if (!path) return -errno; /* Open object for delete. */ ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) { res = -errno; goto exit; } /* deny unlinking metadata files */ if (ni->mft_no < FILE_first_user) { errno = EPERM; res = -errno; goto exit; } /* Generate unicode filename. */ name = strrchr(path, '/'); name++; uname_len = ntfs_mbstoucs(name, &uname); if (uname_len < 0) { res = -errno; goto exit; } /* Open parent directory. */ *--name = 0; dir_ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); /* deny unlinking metadata files from $Extend */ if (!dir_ni || (dir_ni->mft_no == FILE_Extend)) { res = -errno; if (dir_ni) res = -EPERM; goto exit; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* JPA deny unlinking if directory is not writable and executable */ if (!ntfs_fuse_fill_security_context(&security) || ntfs_allowed_dir_access(&security, org_path, dir_ni, ni, S_IEXEC + S_IWRITE + S_ISVTX)) { #endif if (dir_ni->flags & FILE_ATTR_REPARSE_POINT) { #ifndef DISABLE_PLUGINS const plugin_operations_t *ops; REPARSE_POINT *reparse; res = CALL_REPARSE_PLUGIN(dir_ni, unlink, org_path, ni, uname, uname_len); #else /* DISABLE_PLUGINS */ res = -EOPNOTSUPP; #endif /* DISABLE_PLUGINS */ } else if (ntfs_delete(ctx->vol, org_path, ni, dir_ni, uname, uname_len)) res = -errno; /* ntfs_delete() always closes ni and dir_ni */ ni = dir_ni = NULL; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) } else res = -EACCES; #endif exit: if (ntfs_inode_close(dir_ni)) set_fuse_error(&res); if (ntfs_inode_close(ni)) set_fuse_error(&res); free(uname); free(path); return res; } static int ntfs_fuse_rm_stream(const char *path, ntfschar *stream_name, const int stream_name_len) { ntfs_inode *ni; int res = 0; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; if (ntfs_attr_remove(ni, AT_DATA, stream_name, stream_name_len)) res = -errno; if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } static int ntfs_fuse_unlink(const char *org_path) { char *path = NULL; ntfschar *stream_name; int stream_name_len; int res = 0; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; if (!stream_name_len) res = ntfs_fuse_rm(path); else { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * JPA deny unlinking stream if directory is not * writable and executable (debatable) */ if (!ntfs_fuse_fill_security_context(&security) || ntfs_allowed_dir_access(&security, path, (ntfs_inode*)NULL, (ntfs_inode*)NULL, S_IEXEC + S_IWRITE + S_ISVTX)) res = ntfs_fuse_rm_stream(path, stream_name, stream_name_len); else res = -errno; #else res = ntfs_fuse_rm_stream(path, stream_name, stream_name_len); #endif } free(path); if (stream_name_len) free(stream_name); return res; } static int ntfs_fuse_safe_rename(const char *old_path, const char *new_path, const char *tmp) { int ret; ntfs_log_trace("Entering\n"); ret = ntfs_fuse_link(new_path, tmp); if (ret) return ret; ret = ntfs_fuse_unlink(new_path); if (!ret) { ret = ntfs_fuse_link(old_path, new_path); if (ret) goto restore; ret = ntfs_fuse_unlink(old_path); if (ret) { if (ntfs_fuse_unlink(new_path)) goto err; goto restore; } } goto cleanup; restore: if (ntfs_fuse_link(tmp, new_path)) { err: ntfs_log_perror("Rename failed. Existing file '%s' was renamed " "to '%s'", new_path, tmp); } else { cleanup: /* * Condition for this unlink has already been checked in * "ntfs_fuse_rename_existing_dest()", so it should never * fail (unless concurrent access to directories when fuse * is multithreaded) */ if (ntfs_fuse_unlink(tmp) < 0) ntfs_log_perror("Rename failed. Existing file '%s' still present " "as '%s'", new_path, tmp); } return ret; } static int ntfs_fuse_rename_existing_dest(const char *old_path, const char *new_path) { int ret, len; char *tmp; const char *ext = ".ntfs-3g-"; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif ntfs_log_trace("Entering\n"); len = strlen(new_path) + strlen(ext) + 10 + 1; /* wc(str(2^32)) + \0 */ tmp = ntfs_malloc(len); if (!tmp) return -errno; ret = snprintf(tmp, len, "%s%s%010d", new_path, ext, ++ntfs_sequence); if (ret != len - 1) { ntfs_log_error("snprintf failed: %d != %d\n", ret, len - 1); ret = -EOVERFLOW; } else { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * Make sure existing dest can be removed. * This is only needed if parent directory is * sticky, because in this situation condition * for unlinking is different from condition for * linking */ if (!ntfs_fuse_fill_security_context(&security) || ntfs_allowed_dir_access(&security, new_path, (ntfs_inode*)NULL, (ntfs_inode*)NULL, S_IEXEC + S_IWRITE + S_ISVTX)) ret = ntfs_fuse_safe_rename(old_path, new_path, tmp); else ret = -EACCES; #else ret = ntfs_fuse_safe_rename(old_path, new_path, tmp); #endif } free(tmp); return ret; } static int ntfs_fuse_rename(const char *old_path, const char *new_path) { int ret, stream_name_len; char *path = NULL; ntfschar *stream_name; ntfs_inode *ni; u64 inum; BOOL same; ntfs_log_debug("rename: old: '%s' new: '%s'\n", old_path, new_path); /* * FIXME: Rename should be atomic. */ stream_name_len = ntfs_fuse_parse_path(new_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (ni) { ret = ntfs_check_empty_dir(ni); if (ret < 0) { ret = -errno; ntfs_inode_close(ni); goto out; } inum = ni->mft_no; if (ntfs_inode_close(ni)) { set_fuse_error(&ret); goto out; } free(path); path = (char*)NULL; if (stream_name_len) free(stream_name); /* silently ignore a rename to same inode */ stream_name_len = ntfs_fuse_parse_path(old_path, &path, &stream_name); if (stream_name_len < 0) return stream_name_len; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (ni) { same = ni->mft_no == inum; if (ntfs_inode_close(ni)) ret = -errno; else if (!same) ret = ntfs_fuse_rename_existing_dest( old_path, new_path); } else ret = -errno; goto out; } ret = ntfs_fuse_link(old_path, new_path); if (ret) goto out; ret = ntfs_fuse_unlink(old_path); if (ret) ntfs_fuse_unlink(new_path); out: free(path); if (stream_name_len) free(stream_name); return ret; } static int ntfs_fuse_mkdir(const char *path, mode_t mode) { if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ return ntfs_fuse_create(path, S_IFDIR | (mode & 07777), 0, NULL, (struct fuse_file_info*)NULL); } static int ntfs_fuse_rmdir(const char *path) { if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ return ntfs_fuse_rm(path); } #ifdef HAVE_UTIMENSAT static int ntfs_fuse_utimens(const char *path, const struct timespec tv[2]) { ntfs_inode *ni; int res = 0; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_fuse_fill_security_context(&security) && !ntfs_allowed_dir_access(&security,path, (ntfs_inode*)NULL,(ntfs_inode*)NULL,S_IEXEC)) { return (-errno); } #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; /* no check or update if both UTIME_OMIT */ if ((tv[0].tv_nsec != UTIME_OMIT) || (tv[1].tv_nsec != UTIME_OMIT)) { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) if (ntfs_allowed_as_owner(&security, ni) || ((tv[0].tv_nsec == UTIME_NOW) && (tv[1].tv_nsec == UTIME_NOW) && ntfs_allowed_access(&security, ni, S_IWRITE))) { #endif ntfs_time_update_flags mask = NTFS_UPDATE_CTIME; if (tv[0].tv_nsec == UTIME_NOW) mask |= NTFS_UPDATE_ATIME; else if (tv[0].tv_nsec != UTIME_OMIT) ni->last_access_time = timespec2ntfs(tv[0]); if (tv[1].tv_nsec == UTIME_NOW) mask |= NTFS_UPDATE_MTIME; else if (tv[1].tv_nsec != UTIME_OMIT) ni->last_data_change_time = timespec2ntfs(tv[1]); ntfs_inode_update_times(ni, mask); #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) } else res = -errno; #endif } if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } #else /* HAVE_UTIMENSAT */ static int ntfs_fuse_utime(const char *path, struct utimbuf *buf) { ntfs_inode *ni; int res = 0; struct timespec actime; struct timespec modtime; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) BOOL ownerok; BOOL writeok; struct SECURITY_CONTEXT security; #endif if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; /* n/a for named data streams. */ #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_fuse_fill_security_context(&security) && !ntfs_allowed_dir_access(&security,path, (ntfs_inode*)NULL,(ntfs_inode*)NULL,S_IEXEC)) { return (-errno); } #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) ownerok = ntfs_allowed_as_owner(&security, ni); if (buf) { /* * fuse never calls with a NULL buf and we do not * know whether the specific condition can be applied * So we have to accept updating by a non-owner having * write access. */ writeok = !ownerok && (buf->actime == buf->modtime) && ntfs_allowed_access(&security, ni, S_IWRITE); /* Must be owner */ if (!ownerok && !writeok) res = (buf->actime == buf->modtime ? -EACCES : -EPERM); else { actime.tv_sec = buf->actime; actime.tv_nsec = 0; modtime.tv_sec = buf->modtime; modtime.tv_nsec = 0; ni->last_access_time = timespec2ntfs(actime); ni->last_data_change_time = timespec2ntfs(modtime); ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); } } else { /* Must be owner or have write access */ writeok = !ownerok && ntfs_allowed_access(&security, ni, S_IWRITE); if (!ownerok && !writeok) res = -EACCES; else ntfs_inode_update_times(ni, NTFS_UPDATE_AMCTIME); } #else if (buf) { actime.tv_sec = buf->actime; actime.tv_nsec = 0; modtime.tv_sec = buf->modtime; modtime.tv_nsec = 0; ni->last_access_time = timespec2ntfs(actime); ni->last_data_change_time = timespec2ntfs(modtime); ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); } else ntfs_inode_update_times(ni, NTFS_UPDATE_AMCTIME); #endif if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } #endif /* HAVE_UTIMENSAT */ static int ntfs_fuse_fsync(const char *path __attribute__((unused)), int type __attribute__((unused)), struct fuse_file_info *fi __attribute__((unused))) { int ret; /* sync the full device */ ret = ntfs_device_sync(ctx->vol->dev); if (ret) ret = -errno; return (ret); } #if defined(FUSE_INTERNAL) || (FUSE_VERSION >= 28) static int ntfs_fuse_ioctl(const char *path, int cmd, void *arg, struct fuse_file_info *fi __attribute__((unused)), unsigned int flags, void *data) { ntfs_inode *ni; int ret; if (flags & FUSE_IOCTL_COMPAT) return -ENOSYS; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; /* * Linux defines the request argument of ioctl() to be an * unsigned long, which fuse 2.x forwards as a signed int into * which the request sometimes does not fit. * So we must expand the value and make sure it is not sign-extended. */ ret = ntfs_ioctl(ni, (unsigned int)cmd, arg, flags, data); if (ntfs_inode_close (ni)) set_fuse_error(&ret); return ret; } #endif /* defined(FUSE_INTERNAL) || (FUSE_VERSION >= 28) */ static int ntfs_fuse_bmap(const char *path, size_t blocksize, uint64_t *idx) { ntfs_inode *ni; ntfs_attr *na; LCN lcn; int ret = 0; int cl_per_bl = ctx->vol->cluster_size / blocksize; if (blocksize > ctx->vol->cluster_size) return -EINVAL; if (ntfs_fuse_is_named_data_stream(path)) return -EINVAL; ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0); if (!na) { ret = -errno; goto close_inode; } if ((na->data_flags & (ATTR_COMPRESSION_MASK | ATTR_IS_ENCRYPTED)) || !NAttrNonResident(na)) { ret = -EINVAL; goto close_attr; } if (ntfs_attr_map_whole_runlist(na)) { ret = -errno; goto close_attr; } lcn = ntfs_rl_vcn_to_lcn(na->rl, *idx / cl_per_bl); *idx = (lcn > 0) ? lcn * cl_per_bl + *idx % cl_per_bl : 0; close_attr: ntfs_attr_close(na); close_inode: if (ntfs_inode_close(ni)) set_fuse_error(&ret); return ret; } #ifdef HAVE_SETXATTR /* * Name space identifications and prefixes */ enum { XATTRNS_NONE, XATTRNS_USER, XATTRNS_SYSTEM, XATTRNS_SECURITY, XATTRNS_TRUSTED, XATTRNS_OPEN } ; /* * Check whether access to internal data as an extended * attribute in system name space is allowed * * Returns pointer to inode if allowed, * NULL and errno set if not allowed */ static ntfs_inode *ntfs_check_access_xattr(struct SECURITY_CONTEXT *security, const char *path, int attr, BOOL setting) { ntfs_inode *ni; BOOL foracl; mode_t acctype; ni = (ntfs_inode*)NULL; if (ntfs_fuse_is_named_data_stream(path)) errno = EINVAL; /* n/a for named data streams. */ else { foracl = (attr == XATTR_POSIX_ACC) || (attr == XATTR_POSIX_DEF); /* * When accessing Posix ACL, return unsupported if ACL * were disabled or no user mapping has been defined, * or trying to change a Windows-inherited ACL. * However no error will be returned to getfacl */ if (((!ntfs_fuse_fill_security_context(security) || (ctx->secure_flags & ((1 << SECURITY_DEFAULT) | (1 << SECURITY_RAW)))) || !(ctx->secure_flags & (1 << SECURITY_ACL)) || (setting && ctx->inherit)) && foracl) { if (ctx->silent && !ctx->security.mapping[MAPUSERS]) errno = 0; else errno = EOPNOTSUPP; } else { /* * parent directory must be executable, and * for setting a DOS name it must be writeable */ if (setting && (attr == XATTR_NTFS_DOS_NAME)) acctype = S_IEXEC | S_IWRITE; else acctype = S_IEXEC; if ((attr == XATTR_NTFS_DOS_NAME) && !strcmp(path,"/")) /* forbid getting/setting names on root */ errno = EPERM; else if (ntfs_allowed_real_dir_access(security, path, (ntfs_inode*)NULL ,acctype)) { ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); } } } return (ni); } /* * Determine the name space of an extended attribute */ static int xattr_namespace(const char *name) { int namespace; if (ctx->streams == NF_STREAMS_INTERFACE_XATTR) { namespace = XATTRNS_NONE; if (!strncmp(name, nf_ns_user_prefix, nf_ns_user_prefix_len) && (strlen(name) != (size_t)nf_ns_user_prefix_len)) namespace = XATTRNS_USER; else if (!strncmp(name, nf_ns_system_prefix, nf_ns_system_prefix_len) && (strlen(name) != (size_t)nf_ns_system_prefix_len)) namespace = XATTRNS_SYSTEM; else if (!strncmp(name, nf_ns_security_prefix, nf_ns_security_prefix_len) && (strlen(name) != (size_t)nf_ns_security_prefix_len)) namespace = XATTRNS_SECURITY; else if (!strncmp(name, nf_ns_trusted_prefix, nf_ns_trusted_prefix_len) && (strlen(name) != (size_t)nf_ns_trusted_prefix_len)) namespace = XATTRNS_TRUSTED; } else namespace = XATTRNS_OPEN; return (namespace); } /* * Fix the prefix of an extended attribute */ static int fix_xattr_prefix(const char *name, int namespace, ntfschar **lename) { int len; char *prefixed; *lename = (ntfschar*)NULL; switch (namespace) { case XATTRNS_USER : /* * user name space : remove user prefix */ len = ntfs_mbstoucs(name + nf_ns_user_prefix_len, lename); break; case XATTRNS_SYSTEM : case XATTRNS_SECURITY : case XATTRNS_TRUSTED : /* * security, trusted and unmapped system name spaces : * insert ntfs-3g prefix */ prefixed = ntfs_malloc(strlen(xattr_ntfs_3g) + strlen(name) + 1); if (prefixed) { strcpy(prefixed,xattr_ntfs_3g); strcat(prefixed,name); len = ntfs_mbstoucs(prefixed, lename); free(prefixed); } else len = -1; break; case XATTRNS_OPEN : /* * in open name space mode : do no fix prefix */ len = ntfs_mbstoucs(name, lename); break; default : len = -1; } return (len); } static int ntfs_fuse_listxattr(const char *path, char *list, size_t size) { ntfs_attr_search_ctx *actx = NULL; ntfs_inode *ni; int ret = 0; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_fuse_fill_security_context(&security) && !ntfs_allowed_dir_access(&security,path,(ntfs_inode*)NULL, (ntfs_inode*)NULL,S_IEXEC)) { return (-errno); } #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; /* Return with no result for symlinks, fifo, etc. */ if (!user_xattrs_allowed(ctx, ni)) goto exit; /* otherwise file must be readable */ #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) if (!ntfs_allowed_access(&security,ni,S_IREAD)) { ret = -EACCES; goto exit; } #endif actx = ntfs_attr_get_search_ctx(ni, NULL); if (!actx) { ret = -errno; goto exit; } if ((ctx->streams == NF_STREAMS_INTERFACE_XATTR) || (ctx->streams == NF_STREAMS_INTERFACE_OPENXATTR)) { ret = ntfs_fuse_listxattr_common(ni, actx, list, size, ctx->streams == NF_STREAMS_INTERFACE_XATTR); if (ret < 0) goto exit; } if (errno != ENOENT) ret = -errno; exit: if (actx) ntfs_attr_put_search_ctx(actx); if (ntfs_inode_close(ni)) set_fuse_error(&ret); return ret; } static int ntfs_fuse_getxattr_windows(const char *path, const char *name, char *value, size_t size) { ntfs_attr_search_ctx *actx = NULL; ntfs_inode *ni; char *to = value; int ret = 0; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif if (strcmp(name, "ntfs.streams.list")) return -EOPNOTSUPP; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_fuse_fill_security_context(&security) && !ntfs_allowed_dir_access(&security,path,(ntfs_inode*)NULL, (ntfs_inode*)NULL,S_IEXEC)) { return (-errno); } #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) if (!ntfs_allowed_access(&security,ni,S_IREAD)) { ret = -errno; goto exit; } #endif actx = ntfs_attr_get_search_ctx(ni, NULL); if (!actx) { ret = -errno; goto exit; } while (!ntfs_attr_lookup(AT_DATA, NULL, 0, CASE_SENSITIVE, 0, NULL, 0, actx)) { char *tmp_name = NULL; int tmp_name_len; if (!actx->attr->name_length) continue; tmp_name_len = ntfs_ucstombs((ntfschar *)((u8*)actx->attr + le16_to_cpu(actx->attr->name_offset)), actx->attr->name_length, &tmp_name, 0); if (tmp_name_len < 0) { ret = -errno; goto exit; } if (ret) ret++; /* For space delimiter. */ ret += tmp_name_len; if (size) { if ((size_t)ret <= size) { /* Don't add space to the beginning of line. */ if (to != value) { *to = '\0'; to++; } strncpy(to, tmp_name, tmp_name_len); to += tmp_name_len; } else { free(tmp_name); ret = -ERANGE; goto exit; } } free(tmp_name); } if (errno != ENOENT) ret = -errno; exit: if (actx) ntfs_attr_put_search_ctx(actx); if (ntfs_inode_close(ni)) set_fuse_error(&ret); return ret; } #if defined(__APPLE__) || defined(__DARWIN__) static int ntfs_fuse_getxattr(const char *path, const char *name, char *value, size_t size, uint32_t position) #else static int ntfs_fuse_getxattr(const char *path, const char *name, char *value, size_t size) #endif { #if !(defined(__APPLE__) || defined(__DARWIN__)) static const unsigned int position = 0U; #endif ntfs_inode *ni; ntfs_inode *dir_ni; ntfs_attr *na = NULL; ntfschar *lename = NULL; int res, lename_len; s64 rsize; enum SYSTEMXATTRS attr; int namespace; struct SECURITY_CONTEXT security; #if defined(__APPLE__) || defined(__DARWIN__) /* If the attribute is not a resource fork attribute and the position * parameter is non-zero, we return with EINVAL as requesting position * is not permitted for non-resource fork attributes. */ if (position && strcmp(name, XATTR_RESOURCEFORK_NAME)) { return -EINVAL; } #endif attr = ntfs_xattr_system_type(name,ctx->vol); if (attr != XATTR_UNMAPPED) { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * hijack internal data and ACL retrieval, whatever * mode was selected for xattr (from the user's * point of view, ACLs are not xattr) */ ni = ntfs_check_access_xattr(&security, path, attr, FALSE); if (ni) { if (ntfs_allowed_access(&security,ni,S_IREAD)) { if (attr == XATTR_NTFS_DOS_NAME) dir_ni = get_parent_dir(path); else dir_ni = (ntfs_inode*)NULL; res = ntfs_xattr_system_getxattr(&security, attr, ni, dir_ni, value, size); if (dir_ni && ntfs_inode_close(dir_ni)) set_fuse_error(&res); } else { res = -errno; } if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; #else /* * Only hijack NTFS ACL retrieval if POSIX ACLS * option is not selected * Access control is done by fuse */ if (ntfs_fuse_is_named_data_stream(path)) res = -EINVAL; /* n/a for named data streams. */ else { ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (ni) { /* user mapping not mandatory */ ntfs_fuse_fill_security_context(&security); if (attr == XATTR_NTFS_DOS_NAME) dir_ni = get_parent_dir(path); else dir_ni = (ntfs_inode*)NULL; res = ntfs_xattr_system_getxattr(&security, attr, ni, dir_ni, value, size); if (dir_ni && ntfs_inode_close(dir_ni)) set_fuse_error(&res); if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; } #endif return (res); } if (ctx->streams == NF_STREAMS_INTERFACE_WINDOWS) return ntfs_fuse_getxattr_windows(path, name, value, size); if (ctx->streams == NF_STREAMS_INTERFACE_NONE) return -EOPNOTSUPP; namespace = xattr_namespace(name); if (namespace == XATTRNS_NONE) return -EOPNOTSUPP; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_fuse_fill_security_context(&security) && !ntfs_allowed_dir_access(&security,path,(ntfs_inode*)NULL, (ntfs_inode*)NULL,S_IEXEC)) { return (-errno); } /* trusted only readable by root */ if ((namespace == XATTRNS_TRUSTED) && security.uid) return -NTFS_NOXATTR_ERRNO; #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; /* Return with no result for symlinks, fifo, etc. */ if (!user_xattrs_allowed(ctx, ni)) { res = -NTFS_NOXATTR_ERRNO; goto exit; } /* otherwise file must be readable */ #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) if (!ntfs_allowed_access(&security, ni, S_IREAD)) { res = -errno; goto exit; } #endif lename_len = fix_xattr_prefix(name, namespace, &lename); if (lename_len == -1) { res = -errno; goto exit; } na = ntfs_attr_open(ni, AT_DATA, lename, lename_len); if (!na) { res = -NTFS_NOXATTR_ERRNO; goto exit; } rsize = na->data_size; if (ctx->efs_raw && rsize && (na->data_flags & ATTR_IS_ENCRYPTED) && NAttrNonResident(na)) rsize = ((na->data_size + 511) & ~511) + 2; rsize -= position; if (size) { if (size >= (size_t)rsize) { res = ntfs_attr_pread(na, position, rsize, value); if (res != rsize) res = -errno; } else res = -ERANGE; } else res = rsize; exit: if (na) ntfs_attr_close(na); free(lename); if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } #if defined(__APPLE__) || defined(__DARWIN__) static int ntfs_fuse_setxattr(const char *path, const char *name, const char *value, size_t size, int flags, uint32_t position) #else static int ntfs_fuse_setxattr(const char *path, const char *name, const char *value, size_t size, int flags) #endif { #if !(defined(__APPLE__) || defined(__DARWIN__)) static const unsigned int position = 0U; #else BOOL is_resource_fork; #endif ntfs_inode *ni; ntfs_inode *dir_ni; ntfs_attr *na = NULL; ntfschar *lename = NULL; int res, lename_len; size_t total; s64 part; enum SYSTEMXATTRS attr; int namespace; struct SECURITY_CONTEXT security; #if defined(__APPLE__) || defined(__DARWIN__) /* If the attribute is not a resource fork attribute and the position * parameter is non-zero, we return with EINVAL as requesting position * is not permitted for non-resource fork attributes. */ is_resource_fork = strcmp(name, XATTR_RESOURCEFORK_NAME) ? FALSE : TRUE; if (position && !is_resource_fork) { return -EINVAL; } #endif attr = ntfs_xattr_system_type(name,ctx->vol); if (attr != XATTR_UNMAPPED) { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * hijack internal data and ACL setting, whatever * mode was selected for xattr (from the user's * point of view, ACLs are not xattr) * Note : ctime updated on successful settings */ ni = ntfs_check_access_xattr(&security,path,attr,TRUE); if (ni) { if (ntfs_allowed_as_owner(&security,ni)) { if (attr == XATTR_NTFS_DOS_NAME) dir_ni = get_parent_dir(path); else dir_ni = (ntfs_inode*)NULL; res = ntfs_xattr_system_setxattr(&security, attr, ni, dir_ni, value, size, flags); /* never have to close dir_ni */ if (res) res = -errno; } else res = -errno; if (attr != XATTR_NTFS_DOS_NAME) { if (!res) ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); if (ntfs_inode_close(ni)) set_fuse_error(&res); } } else res = -errno; #else /* * Only hijack NTFS ACL setting if POSIX ACLS * option is not selected * Access control is partially done by fuse */ if (ntfs_fuse_is_named_data_stream(path)) res = -EINVAL; /* n/a for named data streams. */ else { /* creation of a new name is not controlled by fuse */ if (attr == XATTR_NTFS_DOS_NAME) ni = ntfs_check_access_xattr(&security,path,attr,TRUE); else ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (ni) { /* * user mapping is not mandatory * if defined, only owner is allowed */ if (!ntfs_fuse_fill_security_context(&security) || ntfs_allowed_as_owner(&security,ni)) { if (attr == XATTR_NTFS_DOS_NAME) dir_ni = get_parent_dir(path); else dir_ni = (ntfs_inode*)NULL; res = ntfs_xattr_system_setxattr(&security, attr, ni, dir_ni, value, size, flags); /* never have to close dir_ni */ if (res) res = -errno; } else res = -errno; if (attr != XATTR_NTFS_DOS_NAME) { if (!res) ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); if (ntfs_inode_close(ni)) set_fuse_error(&res); } } else res = -errno; } #endif return (res); } if ((ctx->streams != NF_STREAMS_INTERFACE_XATTR) && (ctx->streams != NF_STREAMS_INTERFACE_OPENXATTR)) return -EOPNOTSUPP; namespace = xattr_namespace(name); if (namespace == XATTRNS_NONE) return -EOPNOTSUPP; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_fuse_fill_security_context(&security) && !ntfs_allowed_dir_access(&security,path,(ntfs_inode*)NULL, (ntfs_inode*)NULL,S_IEXEC)) { return (-errno); } /* security and trusted only settable by root */ if (((namespace == XATTRNS_SECURITY) || (namespace == XATTRNS_TRUSTED)) && security.uid) return -EPERM; #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) switch (namespace) { case XATTRNS_SECURITY : case XATTRNS_TRUSTED : if (security.uid) { res = -EPERM; goto exit; } break; case XATTRNS_SYSTEM : if (!ntfs_allowed_as_owner(&security,ni)) { res = -EACCES; goto exit; } break; default : /* User xattr not allowed for symlinks, fifo, etc. */ if (!user_xattrs_allowed(ctx, ni)) { res = -EPERM; goto exit; } if (!ntfs_allowed_access(&security,ni,S_IWRITE)) { res = -EACCES; goto exit; } break; } #else /* User xattr not allowed for symlinks, fifo, etc. */ if ((namespace == XATTRNS_USER) && !user_xattrs_allowed(ctx, ni)) { res = -EPERM; goto exit; } #endif lename_len = fix_xattr_prefix(name, namespace, &lename); if ((lename_len == -1) || (ctx->windows_names && ntfs_forbidden_chars(lename,lename_len,TRUE))) { res = -errno; goto exit; } na = ntfs_attr_open(ni, AT_DATA, lename, lename_len); if (na && flags == XATTR_CREATE) { res = -EEXIST; goto exit; } if (!na) { if (flags == XATTR_REPLACE) { res = -NTFS_NOXATTR_ERRNO; goto exit; } if (ntfs_attr_add(ni, AT_DATA, lename, lename_len, NULL, 0)) { res = -errno; goto exit; } if (!(ni->flags & FILE_ATTR_ARCHIVE)) { set_archive(ni); NInoFileNameSetDirty(ni); } na = ntfs_attr_open(ni, AT_DATA, lename, lename_len); if (!na) { res = -errno; goto exit; } #if defined(__APPLE__) || defined(__DARWIN__) } else if (is_resource_fork) { /* In macOS, the resource fork is a special case. It doesn't * ever shrink (it would have to be removed and re-added). */ #endif } else { /* currently compressed streams can only be wiped out */ if (ntfs_attr_truncate(na, (s64)0 /* size */)) { res = -errno; goto exit; } } total = 0; res = 0; if (size) { do { part = ntfs_attr_pwrite(na, position + total, size - total, &value[total]); if (part > 0) total += part; } while ((part > 0) && (total < size)); } if ((total != size) || ntfs_attr_pclose(na)) res = -errno; else { if (ctx->efs_raw && (ni->flags & FILE_ATTR_ENCRYPTED)) { if (ntfs_efs_fixup_attribute(NULL,na)) res = -errno; } } if (!res) { ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); if (!(ni->flags & FILE_ATTR_ARCHIVE)) { set_archive(ni); NInoFileNameSetDirty(ni); } } exit: if (na) ntfs_attr_close(na); free(lename); if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } static int ntfs_fuse_removexattr(const char *path, const char *name) { ntfs_inode *ni; ntfs_inode *dir_ni; ntfschar *lename = NULL; int res = 0, lename_len; enum SYSTEMXATTRS attr; int namespace; struct SECURITY_CONTEXT security; attr = ntfs_xattr_system_type(name,ctx->vol); if (attr != XATTR_UNMAPPED) { switch (attr) { /* * Removal of NTFS ACL, ATTRIB, EFSINFO or TIMES * is never allowed */ case XATTR_NTFS_ACL : case XATTR_NTFS_ATTRIB : case XATTR_NTFS_ATTRIB_BE : case XATTR_NTFS_EFSINFO : case XATTR_NTFS_TIMES : case XATTR_NTFS_TIMES_BE : case XATTR_NTFS_CRTIME : case XATTR_NTFS_CRTIME_BE : res = -EPERM; break; default : #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * hijack internal data and ACL removal, whatever * mode was selected for xattr (from the user's * point of view, ACLs are not xattr) * Note : ctime updated on successful settings */ ni = ntfs_check_access_xattr(&security,path,attr,TRUE); if (ni) { if (ntfs_allowed_as_owner(&security,ni)) { if (attr == XATTR_NTFS_DOS_NAME) dir_ni = get_parent_dir(path); else dir_ni = (ntfs_inode*)NULL; res = ntfs_xattr_system_removexattr(&security, attr, ni, dir_ni); /* never have to close dir_ni */ if (res) res = -errno; } else res = -errno; if (attr != XATTR_NTFS_DOS_NAME) { if (!res) ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); if (ntfs_inode_close(ni)) set_fuse_error(&res); } } else res = -errno; #else /* * Only hijack NTFS ACL setting if POSIX ACLS * option is not selected * Access control is partially done by fuse */ /* creation of a new name is not controlled by fuse */ if (attr == XATTR_NTFS_DOS_NAME) ni = ntfs_check_access_xattr(&security, path, attr, TRUE); else { if (ntfs_fuse_is_named_data_stream(path)) { ni = (ntfs_inode*)NULL; errno = EINVAL; /* n/a for named data streams. */ } else ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); } if (ni) { /* * user mapping is not mandatory * if defined, only owner is allowed */ if (!ntfs_fuse_fill_security_context(&security) || ntfs_allowed_as_owner(&security,ni)) { if (attr == XATTR_NTFS_DOS_NAME) dir_ni = get_parent_dir(path); else dir_ni = (ntfs_inode*)NULL; res = ntfs_xattr_system_removexattr(&security, attr, ni, dir_ni); /* never have to close dir_ni */ if (res) res = -errno; } else res = -errno; if (attr != XATTR_NTFS_DOS_NAME) { if (!res) ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); if (ntfs_inode_close(ni)) set_fuse_error(&res); } } else res = -errno; #endif break; } return (res); } if ((ctx->streams != NF_STREAMS_INTERFACE_XATTR) && (ctx->streams != NF_STREAMS_INTERFACE_OPENXATTR)) return -EOPNOTSUPP; namespace = xattr_namespace(name); if (namespace == XATTRNS_NONE) return -EOPNOTSUPP; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* parent directory must be executable */ if (ntfs_fuse_fill_security_context(&security) && !ntfs_allowed_dir_access(&security,path,(ntfs_inode*)NULL, (ntfs_inode*)NULL,S_IEXEC)) { return (-errno); } /* security and trusted only settable by root */ if (((namespace == XATTRNS_SECURITY) || (namespace == XATTRNS_TRUSTED)) && security.uid) return -EACCES; #endif ni = ntfs_pathname_to_inode(ctx->vol, NULL, path); if (!ni) return -errno; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) switch (namespace) { case XATTRNS_SECURITY : case XATTRNS_TRUSTED : if (security.uid) { res = -EPERM; goto exit; } break; case XATTRNS_SYSTEM : if (!ntfs_allowed_as_owner(&security,ni)) { res = -EACCES; goto exit; } break; default : /* User xattr not allowed for symlinks, fifo, etc. */ if (!user_xattrs_allowed(ctx, ni)) { res = -EPERM; goto exit; } if (!ntfs_allowed_access(&security,ni,S_IWRITE)) { res = -EACCES; goto exit; } break; } #else /* User xattr not allowed for symlinks, fifo, etc. */ if ((namespace == XATTRNS_USER) && !user_xattrs_allowed(ctx, ni)) { res = -EPERM; goto exit; } #endif lename_len = fix_xattr_prefix(name, namespace, &lename); if (lename_len == -1) { res = -errno; goto exit; } if (ntfs_attr_remove(ni, AT_DATA, lename, lename_len)) { if (errno == ENOENT) errno = NTFS_NOXATTR_ERRNO; res = -errno; } if (!res) { ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); if (!(ni->flags & FILE_ATTR_ARCHIVE)) { set_archive(ni); NInoFileNameSetDirty(ni); } } exit: free(lename); if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } #else #if POSIXACLS #error "Option inconsistency : POSIXACLS requires SETXATTR" #endif #endif /* HAVE_SETXATTR */ #ifndef DISABLE_PLUGINS static void register_internal_reparse_plugins(void) { static const plugin_operations_t ops = { .getattr = junction_getattr, .readlink = junction_readlink, } ; static const plugin_operations_t wsl_ops = { .getattr = wsl_getattr, } ; register_reparse_plugin(ctx, IO_REPARSE_TAG_MOUNT_POINT, &ops, (void*)NULL); register_reparse_plugin(ctx, IO_REPARSE_TAG_SYMLINK, &ops, (void*)NULL); register_reparse_plugin(ctx, IO_REPARSE_TAG_LX_SYMLINK, &ops, (void*)NULL); register_reparse_plugin(ctx, IO_REPARSE_TAG_LX_SYMLINK, &ops, (void*)NULL); register_reparse_plugin(ctx, IO_REPARSE_TAG_AF_UNIX, &wsl_ops, (void*)NULL); register_reparse_plugin(ctx, IO_REPARSE_TAG_LX_FIFO, &wsl_ops, (void*)NULL); register_reparse_plugin(ctx, IO_REPARSE_TAG_LX_CHR, &wsl_ops, (void*)NULL); register_reparse_plugin(ctx, IO_REPARSE_TAG_LX_BLK, &wsl_ops, (void*)NULL); } #endif /* DISABLE_PLUGINS */ static void ntfs_close(void) { struct SECURITY_CONTEXT security; if (!ctx) return; if (!ctx->vol) return; if (ctx->mounted) { ntfs_log_info("Unmounting %s (%s)\n", opts.device, ctx->vol->vol_name); if (ntfs_fuse_fill_security_context(&security)) { if (ctx->seccache && ctx->seccache->head.p_reads) { ntfs_log_info("Permissions cache : %lu writes, " "%lu reads, %lu.%1lu%% hits\n", ctx->seccache->head.p_writes, ctx->seccache->head.p_reads, 100 * ctx->seccache->head.p_hits / ctx->seccache->head.p_reads, 1000 * ctx->seccache->head.p_hits / ctx->seccache->head.p_reads % 10); } } ntfs_destroy_security_context(&security); } if (ntfs_umount(ctx->vol, FALSE)) ntfs_log_perror("Failed to close volume %s", opts.device); ctx->vol = NULL; } static void ntfs_fuse_destroy2(void *unused __attribute__((unused))) { ntfs_close(); } static struct fuse_operations ntfs_3g_ops = { .getattr = ntfs_fuse_getattr, .readlink = ntfs_fuse_readlink, .readdir = ntfs_fuse_readdir, .open = ntfs_fuse_open, .release = ntfs_fuse_release, .read = ntfs_fuse_read, .write = ntfs_fuse_write, .truncate = ntfs_fuse_truncate, .ftruncate = ntfs_fuse_ftruncate, .statfs = ntfs_fuse_statfs, .chmod = ntfs_fuse_chmod, .chown = ntfs_fuse_chown, .create = ntfs_fuse_create_file, .mknod = ntfs_fuse_mknod, .symlink = ntfs_fuse_symlink, .link = ntfs_fuse_link, .unlink = ntfs_fuse_unlink, .rename = ntfs_fuse_rename, .mkdir = ntfs_fuse_mkdir, .rmdir = ntfs_fuse_rmdir, #ifdef HAVE_UTIMENSAT .utimens = ntfs_fuse_utimens, #if defined(linux) & !defined(FUSE_INTERNAL) & (FUSE_VERSION < 30) .flag_utime_omit_ok = 1, #endif /* defined(linux) & !defined(FUSE_INTERNAL) */ #else .utime = ntfs_fuse_utime, #endif .fsync = ntfs_fuse_fsync, .fsyncdir = ntfs_fuse_fsync, .bmap = ntfs_fuse_bmap, .destroy = ntfs_fuse_destroy2, #if defined(FUSE_INTERNAL) || (FUSE_VERSION >= 28) .ioctl = ntfs_fuse_ioctl, #endif /* defined(FUSE_INTERNAL) || (FUSE_VERSION >= 28) */ #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) .access = ntfs_fuse_access, .opendir = ntfs_fuse_opendir, .releasedir = ntfs_fuse_release, #endif #ifdef HAVE_SETXATTR .getxattr = ntfs_fuse_getxattr, .setxattr = ntfs_fuse_setxattr, .removexattr = ntfs_fuse_removexattr, .listxattr = ntfs_fuse_listxattr, #endif /* HAVE_SETXATTR */ #if defined(__APPLE__) || defined(__DARWIN__) /* MacFUSE extensions. */ .getxtimes = ntfs_macfuse_getxtimes, .setcrtime = ntfs_macfuse_setcrtime, .setbkuptime = ntfs_macfuse_setbkuptime, .setchgtime = ntfs_macfuse_setchgtime, #endif /* defined(__APPLE__) || defined(__DARWIN__) */ .init = ntfs_init }; static int ntfs_fuse_init(void) { ctx = ntfs_calloc(sizeof(ntfs_fuse_context_t)); if (!ctx) return -1; *ctx = (ntfs_fuse_context_t) { .uid = getuid(), .gid = getgid(), #if defined(linux) .streams = NF_STREAMS_INTERFACE_XATTR, #else .streams = NF_STREAMS_INTERFACE_NONE, #endif .atime = ATIME_RELATIVE, .silent = TRUE, .recover = TRUE }; return 0; } static int ntfs_open(const char *device) { unsigned long flags = 0; if (!ctx->blkdev) flags |= NTFS_MNT_EXCLUSIVE; if (ctx->ro) flags |= NTFS_MNT_RDONLY; else if (!ctx->hiberfile) flags |= NTFS_MNT_MAY_RDONLY; if (ctx->recover) flags |= NTFS_MNT_RECOVER; if (ctx->hiberfile) flags |= NTFS_MNT_IGNORE_HIBERFILE; ctx->vol = ntfs_mount(device, flags); if (!ctx->vol) { ntfs_log_perror("Failed to mount '%s'", device); goto err_out; } if (ctx->sync && ctx->vol->dev) NDevSetSync(ctx->vol->dev); if (ctx->compression) NVolSetCompression(ctx->vol); else NVolClearCompression(ctx->vol); #ifdef HAVE_SETXATTR /* archivers must see hidden files */ if (ctx->efs_raw) ctx->hide_hid_files = FALSE; #endif if (ntfs_set_shown_files(ctx->vol, ctx->show_sys_files, !ctx->hide_hid_files, ctx->hide_dot_files)) goto err_out; if (ntfs_volume_get_free_space(ctx->vol)) { ntfs_log_perror("Failed to read NTFS $Bitmap"); goto err_out; } ctx->vol->free_mft_records = ntfs_get_nr_free_mft_records(ctx->vol); if (ctx->vol->free_mft_records < 0) { ntfs_log_perror("Failed to calculate free MFT records"); goto err_out; } if (ctx->hiberfile && ntfs_volume_check_hiberfile(ctx->vol, 0)) { if (errno != EPERM) goto err_out; if (ntfs_fuse_rm("/hiberfil.sys")) goto err_out; } errno = 0; goto out; err_out: if (!errno) errno = EIO; out : return ntfs_volume_error(errno); } static void usage(void) { ntfs_log_info(usage_msg, EXEC_NAME, VERSION, FUSE_TYPE, fuse_version(), 4 + POSIXACLS*6 - KERNELPERMS*3 + CACHEING, EXEC_NAME, ntfs_home); } #if defined(linux) || defined(__uClinux__) static const char *dev_fuse_msg = "HINT: You should be root, or make ntfs-3g setuid root, or load the FUSE\n" " kernel module as root ('modprobe fuse' or 'insmod /fuse.ko'" " or insmod /fuse.o'). Make also sure that the fuse device" " exists. It's usually either /dev/fuse or /dev/misc/fuse."; static const char *fuse26_kmod_msg = "WARNING: Deficient Linux kernel detected. Some driver features are\n" " not available (swap file on NTFS, boot from NTFS by LILO), and\n" " unmount is not safe unless it's made sure the ntfs-3g process\n" " naturally terminates after calling 'umount'. If you wish this\n" " message to disappear then you should upgrade to at least kernel\n" " version 2.6.20, or request help from your distribution to fix\n" " the kernel problem. The below web page has more information:\n" " https://github.com/tuxera/ntfs-3g/wiki/NTFS-3G-FAQ\n" "\n"; static void mknod_dev_fuse(const char *dev) { struct stat st; if (stat(dev, &st) && (errno == ENOENT)) { mode_t mask = umask(0); if (mknod(dev, S_IFCHR | 0666, makedev(10, 229))) { ntfs_log_perror("Failed to create '%s'", dev); if (errno == EPERM) ntfs_log_error("%s", dev_fuse_msg); } umask(mask); } } static void create_dev_fuse(void) { mknod_dev_fuse("/dev/fuse"); #ifdef __UCLIBC__ { struct stat st; /* The fuse device is under /dev/misc using devfs. */ if (stat("/dev/misc", &st) && (errno == ENOENT)) { mode_t mask = umask(0); mkdir("/dev/misc", 0775); umask(mask); } mknod_dev_fuse("/dev/misc/fuse"); } #endif } static fuse_fstype get_fuse_fstype(void) { char buf[256]; fuse_fstype fstype = FSTYPE_NONE; FILE *f = fopen("/proc/filesystems", "r"); if (!f) { ntfs_log_perror("Failed to open /proc/filesystems"); return FSTYPE_UNKNOWN; } while (fgets(buf, sizeof(buf), f)) { if (strstr(buf, "fuseblk\n")) { fstype = FSTYPE_FUSEBLK; break; } if (strstr(buf, "fuse\n")) fstype = FSTYPE_FUSE; } fclose(f); return fstype; } static fuse_fstype load_fuse_module(void) { int i; struct stat st; pid_t pid; const char *cmd = "/sbin/modprobe"; char *env = (char*)NULL; struct timespec req = { 0, 100000000 }; /* 100 msec */ fuse_fstype fstype; if (!stat(cmd, &st) && !geteuid()) { pid = fork(); if (!pid) { execle(cmd, cmd, "fuse", (char*)NULL, &env); _exit(1); } else if (pid != -1) waitpid(pid, NULL, 0); } for (i = 0; i < 10; i++) { /* * We sleep first because despite the detection of the loaded * FUSE kernel module, fuse_mount() can still fail if it's not * fully functional/initialized. Note, of course this is still * unreliable but usually helps. */ nanosleep(&req, NULL); fstype = get_fuse_fstype(); if (fstype != FSTYPE_NONE) break; } return fstype; } #endif static struct fuse_chan *try_fuse_mount(char *parsed_options) { struct fuse_chan *fc = NULL; struct fuse_args margs = FUSE_ARGS_INIT(0, NULL); /* The fuse_mount() options get modified, so we always rebuild it */ if ((fuse_opt_add_arg(&margs, EXEC_NAME) == -1 || fuse_opt_add_arg(&margs, "-o") == -1 || fuse_opt_add_arg(&margs, parsed_options) == -1)) { ntfs_log_error("Failed to set FUSE options.\n"); goto free_args; } fc = fuse_mount(opts.mnt_point, &margs); free_args: fuse_opt_free_args(&margs); return fc; } static int set_fuseblk_options(char **parsed_options) { char options[64]; long pagesize; u32 blksize = ctx->vol->cluster_size; pagesize = sysconf(_SC_PAGESIZE); if (pagesize < 1) pagesize = 4096; if (blksize > (u32)pagesize) blksize = pagesize; snprintf(options, sizeof(options), ",blkdev,blksize=%u", blksize); if (ntfs_strappend(parsed_options, options)) return -1; return 0; } static struct fuse *mount_fuse(char *parsed_options) { struct fuse *fh = NULL; struct fuse_args args = FUSE_ARGS_INIT(0, NULL); ctx->fc = try_fuse_mount(parsed_options); if (!ctx->fc) return NULL; if (fuse_opt_add_arg(&args, "") == -1) goto err; if (ctx->ro) { char buf[128]; int len; len = snprintf(buf, sizeof(buf), "-ouse_ino,kernel_cache" ",attr_timeout=%d,entry_timeout=%d", (int)TIMEOUT_RO, (int)TIMEOUT_RO); if ((len < 0) || (len >= (int)sizeof(buf)) || (fuse_opt_add_arg(&args, buf) == -1)) goto err; } else { #if !CACHEING if (fuse_opt_add_arg(&args, "-ouse_ino,kernel_cache" ",attr_timeout=0") == -1) goto err; #else if (fuse_opt_add_arg(&args, "-ouse_ino,kernel_cache" ",attr_timeout=1") == -1) goto err; #endif } if (ctx->debug) if (fuse_opt_add_arg(&args, "-odebug") == -1) goto err; fh = fuse_new(ctx->fc, &args , &ntfs_3g_ops, sizeof(ntfs_3g_ops), NULL); if (!fh) goto err; if (fuse_set_signal_handlers(fuse_get_session(fh))) goto err_destory; out: fuse_opt_free_args(&args); return fh; err_destory: fuse_destroy(fh); fh = NULL; err: fuse_unmount(opts.mnt_point, ctx->fc); goto out; } static void setup_logging(char *parsed_options) { if (!ctx->no_detach) { if (daemon(0, ctx->debug)) ntfs_log_error("Failed to daemonize.\n"); else if (!ctx->debug) { #ifndef DEBUG ntfs_log_set_handler(ntfs_log_handler_syslog); /* Override default libntfs identify. */ openlog(EXEC_NAME, LOG_PID, LOG_DAEMON); #endif } } ctx->seccache = (struct PERMISSIONS_CACHE*)NULL; ntfs_log_info("Version %s %s %d\n", VERSION, FUSE_TYPE, fuse_version()); if (strcmp(opts.arg_device,opts.device)) ntfs_log_info("Requested device %s canonicalized as %s\n", opts.arg_device,opts.device); ntfs_log_info("Mounted %s (%s, label \"%s\", NTFS %d.%d)\n", opts.device, (ctx->ro) ? "Read-Only" : "Read-Write", ctx->vol->vol_name, ctx->vol->major_ver, ctx->vol->minor_ver); ntfs_log_info("Cmdline options: %s\n", opts.options ? opts.options : ""); ntfs_log_info("Mount options: %s\n", parsed_options); } int main(int argc, char *argv[]) { char *parsed_options = NULL; struct fuse *fh; #if !(defined(__sun) && defined (__SVR4)) fuse_fstype fstype = FSTYPE_UNKNOWN; #endif const char *permissions_mode = (const char*)NULL; const char *failed_secure = (const char*)NULL; #if defined(HAVE_SETXATTR) && defined(XATTR_MAPPINGS) struct XATTRMAPPING *xattr_mapping = (struct XATTRMAPPING*)NULL; #endif /* defined(HAVE_SETXATTR) && defined(XATTR_MAPPINGS) */ struct stat sbuf; unsigned long existing_mount; int err, fd; /* * Make sure file descriptors 0, 1 and 2 are open, * otherwise chaos would ensue. */ do { fd = open("/dev/null", O_RDWR); if (fd > 2) close(fd); } while (fd >= 0 && fd <= 2); #ifndef FUSE_INTERNAL if ((getuid() != geteuid()) || (getgid() != getegid())) { fprintf(stderr, "%s", setuid_msg); return NTFS_VOLUME_INSECURE; } #endif if (drop_privs()) return NTFS_VOLUME_NO_PRIVILEGE; ntfs_set_locale(); ntfs_log_set_handler(ntfs_log_handler_stderr); if (ntfs_parse_options(&opts, usage, argc, argv)) { usage(); return NTFS_VOLUME_SYNTAX_ERROR; } if (ntfs_fuse_init()) { err = NTFS_VOLUME_OUT_OF_MEMORY; goto err2; } parsed_options = parse_mount_options(ctx, &opts, FALSE); if (!parsed_options) { err = NTFS_VOLUME_SYNTAX_ERROR; goto err_out; } if (!ntfs_check_if_mounted(opts.device,&existing_mount) && (existing_mount & NTFS_MF_MOUNTED) /* accept multiple read-only mounts */ && (!(existing_mount & NTFS_MF_READONLY) || !ctx->ro)) { err = NTFS_VOLUME_LOCKED; goto err_out; } /* need absolute mount point for junctions */ if (opts.mnt_point[0] == '/') ctx->abs_mnt_point = strdup(opts.mnt_point); else { ctx->abs_mnt_point = (char*)ntfs_malloc(PATH_MAX); if (ctx->abs_mnt_point) { if ((strlen(opts.mnt_point) < PATH_MAX) && getcwd(ctx->abs_mnt_point, PATH_MAX - strlen(opts.mnt_point) - 1)) { strcat(ctx->abs_mnt_point, "/"); strcat(ctx->abs_mnt_point, opts.mnt_point); #if defined(__sun) && defined (__SVR4) /* Solaris also wants the absolute mount point */ opts.mnt_point = ctx->abs_mnt_point; #endif /* defined(__sun) && defined (__SVR4) */ } else { free(ctx->abs_mnt_point); ctx->abs_mnt_point = (char*)NULL; } } } if (!ctx->abs_mnt_point) { err = NTFS_VOLUME_OUT_OF_MEMORY; goto err_out; } ctx->security.uid = 0; ctx->security.gid = 0; if ((opts.mnt_point[0] == '/') && !stat(opts.mnt_point,&sbuf)) { /* collect owner of mount point, useful for default mapping */ ctx->security.uid = sbuf.st_uid; ctx->security.gid = sbuf.st_gid; } #if defined(linux) || defined(__uClinux__) fstype = get_fuse_fstype(); err = NTFS_VOLUME_NO_PRIVILEGE; if (restore_privs()) goto err_out; if (fstype == FSTYPE_NONE || fstype == FSTYPE_UNKNOWN) fstype = load_fuse_module(); create_dev_fuse(); if (drop_privs()) goto err_out; #endif if (stat(opts.device, &sbuf)) { ntfs_log_perror("Failed to access '%s'", opts.device); err = NTFS_VOLUME_NO_PRIVILEGE; goto err_out; } #if !(defined(__sun) && defined (__SVR4)) /* Always use fuseblk for block devices unless it's surely missing. */ if (S_ISBLK(sbuf.st_mode) && (fstype != FSTYPE_FUSE)) ctx->blkdev = TRUE; #endif #ifndef FUSE_INTERNAL if (getuid() && ctx->blkdev) { ntfs_log_error("%s", unpriv_fuseblk_msg); err = NTFS_VOLUME_NO_PRIVILEGE; goto err2; } #endif err = ntfs_open(opts.device); if (err) goto err_out; /* Force read-only mount if the device was found read-only */ if (!ctx->ro && NVolReadOnly(ctx->vol)) { ctx->rw = FALSE; ctx->ro = TRUE; if (ntfs_strinsert(&parsed_options, ",ro")) goto err_out; ntfs_log_info("Could not mount read-write, trying read-only\n"); } else if (ctx->rw && ntfs_strinsert(&parsed_options, ",rw")) goto err_out; /* We must do this after ntfs_open() to be able to set the blksize */ if (ctx->blkdev && set_fuseblk_options(&parsed_options)) goto err_out; ctx->vol->abs_mnt_point = ctx->abs_mnt_point; ctx->security.vol = ctx->vol; ctx->vol->secure_flags = ctx->secure_flags; ctx->vol->special_files = ctx->special_files; #ifdef HAVE_SETXATTR /* extended attributes interface required */ ctx->vol->efs_raw = ctx->efs_raw; #endif /* HAVE_SETXATTR */ if (!ntfs_build_mapping(&ctx->security,ctx->usermap_path, (ctx->vol->secure_flags & ((1 << SECURITY_DEFAULT) | (1 << SECURITY_ACL))) && !ctx->inherit && !(ctx->vol->secure_flags & (1 << SECURITY_WANTED)))) { #if POSIXACLS /* use basic permissions if requested */ if (ctx->vol->secure_flags & (1 << SECURITY_DEFAULT)) permissions_mode = "User mapping built, Posix ACLs not used"; else { permissions_mode = "User mapping built, Posix ACLs in use"; #if KERNELACLS if (ntfs_strinsert(&parsed_options, ",default_permissions,acl")) { err = NTFS_VOLUME_SYNTAX_ERROR; goto err_out; } #endif /* KERNELACLS */ } #else /* POSIXACLS */ #if KERNELPERMS if (!(ctx->vol->secure_flags & ((1 << SECURITY_DEFAULT) | (1 << SECURITY_ACL)))) { /* * No explicit option but user mapping found * force default security */ ctx->vol->secure_flags |= (1 << SECURITY_DEFAULT); if (ntfs_strinsert(&parsed_options, ",default_permissions")) { err = NTFS_VOLUME_SYNTAX_ERROR; goto err_out; } } #endif /* KERNELPERMS */ permissions_mode = "User mapping built"; #endif /* POSIXACLS */ ctx->dmask = ctx->fmask = 0; } else { ctx->security.uid = ctx->uid; ctx->security.gid = ctx->gid; /* same ownership/permissions for all files */ ctx->security.mapping[MAPUSERS] = (struct MAPPING*)NULL; ctx->security.mapping[MAPGROUPS] = (struct MAPPING*)NULL; if ((ctx->vol->secure_flags & (1 << SECURITY_WANTED)) && !(ctx->vol->secure_flags & (1 << SECURITY_DEFAULT))) { ctx->vol->secure_flags |= (1 << SECURITY_DEFAULT); if (ntfs_strinsert(&parsed_options, ",default_permissions")) { err = NTFS_VOLUME_SYNTAX_ERROR; goto err_out; } } if (ctx->vol->secure_flags & (1 << SECURITY_DEFAULT)) { ctx->vol->secure_flags |= (1 << SECURITY_RAW); permissions_mode = "Global ownership and permissions enforced"; } else { ctx->vol->secure_flags &= ~(1 << SECURITY_RAW); permissions_mode = "Ownership and permissions disabled"; } } if (ctx->usermap_path) free (ctx->usermap_path); #if defined(HAVE_SETXATTR) && defined(XATTR_MAPPINGS) xattr_mapping = ntfs_xattr_build_mapping(ctx->vol, ctx->xattrmap_path); ctx->vol->xattr_mapping = xattr_mapping; /* * Errors are logged, do not refuse mounting, it would be * too difficult to fix the unmountable mapping file. */ if (ctx->xattrmap_path) free(ctx->xattrmap_path); #endif /* defined(HAVE_SETXATTR) && defined(XATTR_MAPPINGS) */ #ifndef DISABLE_PLUGINS register_internal_reparse_plugins(); #endif /* DISABLE_PLUGINS */ fh = mount_fuse(parsed_options); if (!fh) { err = NTFS_VOLUME_FUSE_ERROR; goto err_out; } ctx->mounted = TRUE; #if defined(linux) || defined(__uClinux__) if (S_ISBLK(sbuf.st_mode) && (fstype == FSTYPE_FUSE)) ntfs_log_info("%s", fuse26_kmod_msg); #endif setup_logging(parsed_options); if (failed_secure) ntfs_log_info("%s\n",failed_secure); if (permissions_mode) ntfs_log_info("%s, configuration type %d\n",permissions_mode, 4 + POSIXACLS*6 - KERNELPERMS*3 + CACHEING); if ((ctx->vol->secure_flags & (1 << SECURITY_RAW)) && !ctx->uid && ctx->gid) ntfs_log_error("Warning : using problematic uid==0 and gid!=0\n"); fuse_loop(fh); err = 0; fuse_unmount(opts.mnt_point, ctx->fc); fuse_destroy(fh); err_out: ntfs_mount_error(opts.device, opts.mnt_point, err); if (ctx->abs_mnt_point) free(ctx->abs_mnt_point); #if defined(HAVE_SETXATTR) && defined(XATTR_MAPPINGS) ntfs_xattr_free_mapping(xattr_mapping); #endif /* defined(HAVE_SETXATTR) && defined(XATTR_MAPPINGS) */ err2: ntfs_close(); #ifndef DISABLE_PLUGINS close_reparse_plugins(ctx); #endif /* DISABLE_PLUGINS */ free(ctx); free(parsed_options); free(opts.options); free(opts.device); return err; }