/** * 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) 2007-2009 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 #include #if !defined(FUSE_VERSION) || (FUSE_VERSION < 26) #error "***********************************************************" #error "* *" #error "* Compilation requires at least FUSE version 2.6.0! *" #error "* *" #error "***********************************************************" #endif #ifdef FUSE_INTERNAL #define FUSE_TYPE "integrated FUSE low" #else #define FUSE_TYPE "external FUSE low" #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 #include #ifdef HAVE_SETXATTR #include #endif #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_MKDEV_H #include #endif #if defined(__APPLE__) || defined(__DARWIN__) #include #endif /* defined(__APPLE__) || defined(__DARWIN__) */ #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 "object_id.h" #include "efs.h" #include "logging.h" #include "misc.h" /* * The following permission checking modes are governed by * the LPERMSCONFIG value in param.h */ /* ACLS may be checked by kernel (requires a fuse patch) or here */ #define KERNELACLS ((LPERMSCONFIG > 6) & (LPERMSCONFIG < 10)) /* basic permissions may be checked by kernel or here */ #define KERNELPERMS (((LPERMSCONFIG - 1) % 6) < 3) /* may want to use fuse/kernel cacheing */ #define CACHEING (!(LPERMSCONFIG % 3)) #if KERNELACLS & !KERNELPERMS #error "Incompatible options KERNELACLS and KERNELPERMS" #endif #if CACHEING & (KERNELACLS | !KERNELPERMS) #warning "Fuse cacheing is broken unless basic permissions checked by kernel" #endif #if !CACHEING /* * FUSE cacheing is broken except for basic permissions * checked by the kernel * So do not use cacheing until this is fixed */ #define ATTR_TIMEOUT 0.0 #define ENTRY_TIMEOUT 0.0 #else #define ATTR_TIMEOUT (ctx->vol->secure_flags & (1 << SECURITY_DEFAULT) ? 1.0 : 0.0) #define ENTRY_TIMEOUT (ctx->vol->secure_flags & (1 << SECURITY_DEFAULT) ? 1.0 : 0.0) #endif #define GHOSTLTH 40 /* max length of a ghost file name - see ghostformat */ /* 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 #define INODE(ino) ((ino) == 1 ? (MFT_REF)FILE_root : (MFT_REF)(ino)) typedef enum { FSTYPE_NONE, FSTYPE_UNKNOWN, FSTYPE_FUSE, FSTYPE_FUSEBLK } fuse_fstype; typedef enum { ATIME_ENABLED, ATIME_DISABLED, ATIME_RELATIVE } ntfs_atime_t; typedef struct fill_item { struct fill_item *next; size_t bufsize; size_t off; char buf[0]; } ntfs_fuse_fill_item_t; typedef struct fill_context { struct fill_item *first; struct fill_item *last; fuse_req_t req; fuse_ino_t ino; BOOL filled; } ntfs_fuse_fill_context_t; struct open_file { struct open_file *next; struct open_file *previous; long long ghost; fuse_ino_t ino; fuse_ino_t parent; int state; } ; typedef enum { NF_STREAMS_INTERFACE_NONE, /* No access to named data streams. */ NF_STREAMS_INTERFACE_XATTR, /* Map named data streams to xattrs. */ NF_STREAMS_INTERFACE_OPENXATTR, /* Same, not limited to "user." */ } ntfs_fuse_streams_interface; enum { CLOSE_GHOST = 1, CLOSE_COMPRESSED = 2, CLOSE_ENCRYPTED = 4 }; typedef struct { ntfs_volume *vol; unsigned int uid; unsigned int gid; unsigned int fmask; unsigned int dmask; ntfs_fuse_streams_interface streams; ntfs_atime_t atime; BOOL ro; BOOL show_sys_files; BOOL silent; BOOL recover; BOOL hiberfile; BOOL debug; BOOL no_detach; BOOL blkdev; BOOL mounted; BOOL efs_raw; struct fuse_chan *fc; BOOL inherit; unsigned int secure_flags; char *usermap_path; char *abs_mnt_point; struct PERMISSIONS_CACHE *seccache; struct SECURITY_CONTEXT security; struct open_file *open_files; u64 latest_ghost; } ntfs_fuse_context_t; static struct options { char *mnt_point; /* Mount point */ char *options; /* Mount options */ char *device; /* Device to mount */ } opts; static const char *EXEC_NAME = "ntfs-3g"; static char def_opts[] = "silent,allow_other,nonempty,"; static ntfs_fuse_context_t *ctx; static u32 ntfs_sequence; static const char ghostformat[] = ".ghost-ntfs-3g-%020llu"; 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) 2007-2009 Jean-Pierre Andre\n" "Copyright (C) 2009 Erik Larsson\n" "\n" "Usage: %s [-o option[,...]] \n" "\n" "Options: ro (read-only mount), remove_hiberfile, 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" "%s"; static const char ntfs_bad_reparse[] = "unsupported reparse point"; #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; } static int restore_privs(void) { return 0; } 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 http://ntfs-3g.org/support.html#unprivileged\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" "http://ntfs-3g.org/support.html#unprivileged\n"; #endif 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 && ni->last_access_time >= ni->last_data_change_time && ni->last_access_time >= 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(fuse_req_t req, struct SECURITY_CONTEXT *scx) { const struct fuse_ctx *fusecontext; scx->vol = ctx->vol; scx->mapping[MAPUSERS] = ctx->security.mapping[MAPUSERS]; scx->mapping[MAPGROUPS] = ctx->security.mapping[MAPGROUPS]; scx->pseccache = &ctx->seccache; if (req) { fusecontext = fuse_req_ctx(req); 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 } else { scx->uid = 0; scx->gid = 0; scx->tid = 0; scx->umask = 0; } return (ctx->security.mapping[MAPUSERS] != (struct MAPPING*)NULL); } static u64 ntfs_fuse_inode_lookup(fuse_ino_t parent, const char *name) { u64 ino = (u64)-1; u64 inum; ntfs_inode *dir_ni; /* Open target directory. */ dir_ni = ntfs_inode_open(ctx->vol, INODE(parent)); if (dir_ni) { /* Lookup file */ inum = ntfs_inode_lookup_by_mbsname(dir_ni, name); if (ntfs_inode_close(dir_ni) || (inum == (u64)-1)) ino = (u64)-1; else ino = MREF(inum); } return (ino); } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * Check access to parent directory * * file inode is only opened when not fed in and S_ISVTX is requested, * when already open and S_ISVTX, it *HAS TO* be fed in. * * 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, ntfs_inode *dir_ni, fuse_ino_t ino, ntfs_inode *ni, mode_t accesstype) { int allowed; ntfs_inode *ni2; struct stat stbuf; allowed = ntfs_allowed_access(scx, dir_ni, accesstype); /* * for an 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_inode_open(ctx->vol, INODE(ino)); 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 /* !KERNELPERMS | (POSIXACLS & !KERNELACLS) */ /** * 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 void ntfs_fuse_statfs(fuse_req_t req, fuse_ino_t ino __attribute__((unused))) { struct statvfs sfs; s64 size; int delta_bits; ntfs_volume *vol; vol = ctx->vol; if (vol) { /* * 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; fuse_reply_statfs(req, &sfs); } else fuse_reply_err(req, ENODEV); } 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 = 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 = 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 = 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__) */ #if defined(FUSE_CAP_DONT_MASK) || (defined(__APPLE__) || defined(__DARWIN__)) static void ntfs_init(void *userdata __attribute__((unused)), 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 */ } #endif /* defined(FUSE_CAP_DONT_MASK) || (defined(__APPLE__) || defined(__DARWIN__)) */ static int ntfs_fuse_getstat(struct SECURITY_CONTEXT *scx, ntfs_inode *ni, struct stat *stbuf) { int res = 0; ntfs_attr *na; BOOL withusermapping; memset(stbuf, 0, sizeof(struct stat)); withusermapping = (scx->mapping[MAPUSERS] != (struct MAPPING*)NULL); if ((ni->mrec->flags & MFT_RECORD_IS_DIRECTORY) || (ni->flags & FILE_ATTR_REPARSE_POINT)) { if (ni->flags & FILE_ATTR_REPARSE_POINT) { char *target; int attr_size; errno = 0; target = ntfs_make_symlink(ni, ctx->abs_mnt_point, &attr_size); /* * 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)) { /* returning attribute size */ if (target) stbuf->st_size = attr_size; else stbuf->st_size = sizeof(ntfs_bad_reparse); 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; } } 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; 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; /* * 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) stbuf->st_size = ((ni->data_size + 511) & ~511) + 2; /* * 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; stbuf->st_nlink = le16_to_cpu(ni->mrec->link_count); if (ni->flags & FILE_ATTR_SYSTEM) { na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0); if (!na) { goto exit; } /* Check whether it's Interix FIFO or socket. */ if (!(ni->flags & FILE_ATTR_HIDDEN)) { /* FIFO. */ if (na->data_size == 0) stbuf->st_mode = S_IFIFO; /* Socket link. */ if (na->data_size == 1) stbuf->st_mode = S_IFSOCK; } /* * Check whether it's Interix symbolic link, block or * character device. */ if ((size_t)na->data_size <= sizeof(INTX_FILE_TYPES) + sizeof(ntfschar) * PATH_MAX && (size_t)na->data_size > sizeof(INTX_FILE_TYPES)) { INTX_FILE *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 == (s64)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 == (s64)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) stbuf->st_mode = S_IFLNK; free(intx_file); } ntfs_attr_close(na); } stbuf->st_mode |= (0777 & ~ctx->fmask); } if (withusermapping) { if (ntfs_get_owner_mode(scx,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; stbuf->st_ino = ni->mft_no; stbuf->st_atime = ni->last_access_time; stbuf->st_ctime = ni->last_mft_change_time; stbuf->st_mtime = ni->last_data_change_time; exit: return (res); } static void ntfs_fuse_getattr(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi __attribute__((unused))) { int res; ntfs_inode *ni; struct stat stbuf; struct SECURITY_CONTEXT security; ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) res = -errno; else { ntfs_fuse_fill_security_context(req, &security); res = ntfs_fuse_getstat(&security, ni, &stbuf); if (ntfs_inode_close(ni)) set_fuse_error(&res); } if (!res) fuse_reply_attr(req, &stbuf, ATTR_TIMEOUT); else fuse_reply_err(req, -res); } static __inline__ BOOL ntfs_fuse_fillstat(struct SECURITY_CONTEXT *scx, struct fuse_entry_param *pentry, u64 iref) { ntfs_inode *ni; BOOL ok = FALSE; pentry->ino = MREF(iref); ni = ntfs_inode_open(ctx->vol, pentry->ino); if (ni) { if (!ntfs_fuse_getstat(scx, ni, &pentry->attr)) { pentry->generation = 1; pentry->attr_timeout = ATTR_TIMEOUT; pentry->entry_timeout = ENTRY_TIMEOUT; ok = TRUE; } if (ntfs_inode_close(ni)) ok = FALSE; } return (ok); } static void ntfs_fuse_lookup(fuse_req_t req, fuse_ino_t parent, const char *name) { struct SECURITY_CONTEXT security; struct fuse_entry_param entry; ntfs_inode *dir_ni; u64 iref; BOOL ok = FALSE; if (strlen(name) < 256) { dir_ni = ntfs_inode_open(ctx->vol, INODE(parent)); if (dir_ni) { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * make sure the parent directory is searchable */ if (ntfs_fuse_fill_security_context(req, &security) && !ntfs_allowed_access(&security,dir_ni,S_IEXEC)) { ntfs_inode_close(dir_ni); errno = EACCES; } else { #else ntfs_fuse_fill_security_context(req, &security); #endif iref = ntfs_inode_lookup_by_mbsname(dir_ni, name); ok = !ntfs_inode_close(dir_ni) && (iref != (u64)-1) && ntfs_fuse_fillstat( &security,&entry,iref); #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) } #endif } } else errno = ENAMETOOLONG; if (!ok) fuse_reply_err(req, errno); else fuse_reply_entry(req, &entry); } static void ntfs_fuse_readlink(fuse_req_t req, fuse_ino_t ino) { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; INTX_FILE *intx_file = NULL; char *buf = (char*)NULL; int res = 0; /* Get inode. */ ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; goto exit; } /* * Reparse point : analyze as a junction point */ if (ni->flags & FILE_ATTR_REPARSE_POINT) { int attr_size; errno = 0; res = 0; buf = ntfs_make_symlink(ni, ctx->abs_mnt_point, &attr_size); if (!buf) { if (errno == EOPNOTSUPP) buf = strdup(ntfs_bad_reparse); if (!buf) 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 = (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, 0) < 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); if (res < 0) fuse_reply_err(req, -res); else fuse_reply_readlink(req, buf); if (buf != ntfs_bad_reparse) free(buf); } 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; size_t sz; ntfs_fuse_fill_item_t *current; ntfs_fuse_fill_item_t *newone; 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 (MREF(mref) == FILE_root || MREF(mref) >= FILE_first_user || ctx->show_sys_files) { struct stat st = { .st_ino = MREF(mref) }; if (dt_type == NTFS_DT_REG) st.st_mode = S_IFREG | (0777 & ~ctx->fmask); else if (dt_type == NTFS_DT_DIR) st.st_mode = S_IFDIR | (0777 & ~ctx->dmask); #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); } #endif /* defined(__APPLE__) || defined(__DARWIN__) */ current = fill_ctx->last; sz = fuse_add_direntry(fill_ctx->req, ¤t->buf[current->off], current->bufsize - current->off, filename, &st, current->off); if (!sz || ((current->off + sz) > current->bufsize)) { newone = (ntfs_fuse_fill_item_t*)ntfs_malloc (sizeof(ntfs_fuse_fill_item_t) + current->bufsize); newone->off = 0; newone->bufsize = current->bufsize; newone->next = (ntfs_fuse_fill_item_t*)NULL; current->next = newone; fill_ctx->last = newone; current = newone; sz = fuse_add_direntry(fill_ctx->req, current->buf, current->bufsize - current->off, filename, &st, current->off); } if (sz) { current->off += sz; } else { ret = -1; errno = EIO; /* ? */ } } free(filename); return ret; } static void ntfs_fuse_opendir(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) { int res = 0; ntfs_inode *ni; int accesstype; ntfs_fuse_fill_context_t *fill; struct SECURITY_CONTEXT security; ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (ni) { if (ntfs_fuse_fill_security_context(req, &security)) { if (fi->flags & O_WRONLY) accesstype = S_IWRITE; else if (fi->flags & O_RDWR) accesstype = S_IWRITE | S_IREAD; else accesstype = S_IREAD; if (!ntfs_allowed_access(&security,ni,accesstype)) res = -EACCES; } if (ntfs_inode_close(ni)) set_fuse_error(&res); if (!res) { fill = (ntfs_fuse_fill_context_t*) ntfs_malloc(sizeof(ntfs_fuse_fill_context_t)); if (!fill) res = -errno; else { fill->first = fill->last = (ntfs_fuse_fill_item_t*)NULL; fill->filled = FALSE; fill->ino = ino; } fi->fh = (long)fill; } } else res = -errno; if (!res) fuse_reply_open(req, fi); else fuse_reply_err(req, -res); } static void ntfs_fuse_releasedir(fuse_req_t req, fuse_ino_t ino __attribute__((unused)), struct fuse_file_info *fi) { ntfs_fuse_fill_context_t *fill; ntfs_fuse_fill_item_t *current; fill = (ntfs_fuse_fill_context_t*)(long)fi->fh; /* make sure to clear results */ current = fill->first; while (current) { current = current->next; free(fill->first); fill->first = current; } free(fill); fuse_reply_err(req, 0); } static void ntfs_fuse_readdir(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off __attribute__((unused)), struct fuse_file_info *fi __attribute__((unused))) { ntfs_fuse_fill_item_t *first; ntfs_fuse_fill_item_t *current; ntfs_fuse_fill_context_t *fill; ntfs_inode *ni; s64 pos = 0; int err = 0; fill = (ntfs_fuse_fill_context_t*)(long)fi->fh; if (fill) { if (!fill->filled) { /* initial call : build the full list */ first = (ntfs_fuse_fill_item_t*)ntfs_malloc (sizeof(ntfs_fuse_fill_item_t) + size); if (first) { first->bufsize = size; first->off = 0; first->next = (ntfs_fuse_fill_item_t*)NULL; fill->req = req; fill->first = first; fill->last = first; ni = ntfs_inode_open(ctx->vol,INODE(ino)); if (!ni) err = -errno; else { if (ntfs_readdir(ni, &pos, fill, (ntfs_filldir_t) ntfs_fuse_filler)) err = -errno; fill->filled = TRUE; ntfs_fuse_update_times(ni, NTFS_UPDATE_ATIME); if (ntfs_inode_close(ni)) set_fuse_error(&err); } if (!err) fuse_reply_buf(req, first->buf, first->off); /* reply sent, now must exit with no error */ fill->first = first->next; free(first); } else err = -errno; } else { /* subsequent call : return next non-empty buffer */ current = fill->first; while (current && !current->off) { current = current->next; free(fill->first); fill->first = current; } if (current) { fuse_reply_buf(req, current->buf, current->off); fill->first = current->next; free(current); } else { fuse_reply_buf(req, (char*)NULL, 0); /* reply sent, now must exit with no error */ } } } else { errno = EIO; err = -errno; ntfs_log_error("Uninitialized fuse_readdir()\n"); } if (err) fuse_reply_err(req, -err); } static void ntfs_fuse_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) { ntfs_inode *ni; ntfs_attr *na; struct open_file *of; int state = 0; char *path = NULL; int res = 0; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) int accesstype; struct SECURITY_CONTEXT security; #endif ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (ni) { na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0); if (na) { #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) if (ntfs_fuse_fill_security_context(req, &security)) { if (fi->flags & O_WRONLY) accesstype = S_IWRITE; else if (fi->flags & O_RDWR) accesstype = S_IWRITE | S_IREAD; else accesstype = S_IREAD; /* check whether requested access is allowed */ if (!ntfs_allowed_access(&security, ni,accesstype)) res = -EACCES; } #endif 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) state |= CLOSE_COMPRESSED; /* mark a future need to fixup encrypted inode */ if (ctx->efs_raw && !(na->data_flags & ATTR_IS_ENCRYPTED) && (ni->flags & FILE_ATTR_ENCRYPTED)) state |= CLOSE_ENCRYPTED; } ntfs_attr_close(na); } else res = -errno; if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; free(path); if (res >= 0) { of = (struct open_file*)malloc(sizeof(struct open_file)); if (of) { of->parent = 0; of->ino = ino; of->state = state; of->next = ctx->open_files; of->previous = (struct open_file*)NULL; if (ctx->open_files) ctx->open_files->previous = of; ctx->open_files = of; fi->fh = (long)of; } } if (res) fuse_reply_err(req, -res); else fuse_reply_open(req, fi); } static void ntfs_fuse_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t offset, struct fuse_file_info *fi __attribute__((unused))) { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; int res; char *buf = (char*)NULL; s64 total = 0; s64 max_read; if (!size) goto exit; buf = (char*)ntfs_malloc(size); if (!buf) { res = -errno; goto exit; } ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; goto exit; } na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0); if (!na) { res = -errno; goto exit; } /* limit reads at next 512 byte boundary for encrypted attributes */ max_read = na->data_size; if (ctx->efs_raw && (na->data_flags & ATTR_IS_ENCRYPTED) && NAttrNonResident(na)) { max_read = ((na->data_size+511) & ~511) + 2; } 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 inode %lld at " "offset %lld: %lld <> %lld", (long long)ni->mft_no, (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: ntfs_fuse_update_times(na->ni, NTFS_UPDATE_ATIME); res = total; exit: if (na) ntfs_attr_close(na); if (ntfs_inode_close(ni)) set_fuse_error(&res); if (res < 0) fuse_reply_err(req, -res); else fuse_reply_buf(req, buf, res); free(buf); } static void ntfs_fuse_write(fuse_req_t req, fuse_ino_t ino, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi __attribute__((unused))) { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; int res, total = 0; ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; goto exit; } na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0); 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; if (res > 0) ntfs_fuse_update_times(na->ni, NTFS_UPDATE_MCTIME); exit: if (na) ntfs_attr_close(na); if (total) set_archive(ni); if (ntfs_inode_close(ni)) set_fuse_error(&res); if (res < 0) fuse_reply_err(req, -res); else fuse_reply_write(req, res); } static int ntfs_fuse_chmod(struct SECURITY_CONTEXT *scx, fuse_ino_t ino, mode_t mode, struct stat *stbuf) { int res = 0; ntfs_inode *ni; /* return unsupported if no user mapping has been defined */ if (!scx->mapping[MAPUSERS] && !ctx->silent) { res = -EOPNOTSUPP; } else { ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) res = -errno; else { if (scx->mapping[MAPUSERS]) { if (ntfs_set_mode(scx, ni, mode)) res = -errno; else { ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); /* * Must return updated times, and * inode has been updated, so hope * we get no further errors */ res = ntfs_fuse_getstat(scx, ni, stbuf); } NInoSetDirty(ni); } else res = ntfs_fuse_getstat(scx, ni, stbuf); if (ntfs_inode_close(ni)) set_fuse_error(&res); } } return res; } static int ntfs_fuse_chown(struct SECURITY_CONTEXT *scx, fuse_ino_t ino, uid_t uid, gid_t gid, struct stat *stbuf) { ntfs_inode *ni; int res; if (!scx->mapping[MAPUSERS] && !ctx->silent && ((uid != ctx->uid) || (gid != ctx->gid))) res = -EOPNOTSUPP; else { res = 0; ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) res = -errno; else { if (scx->mapping[MAPUSERS] && (((int)uid != -1) || ((int)gid != -1))) { if (ntfs_set_owner(scx, ni, uid, gid)) res = -errno; else { ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); /* * Must return updated times, and * inode has been updated, so hope * we get no further errors */ res = ntfs_fuse_getstat(scx, ni, stbuf); } } else res = ntfs_fuse_getstat(scx, ni, stbuf); if (ntfs_inode_close(ni)) set_fuse_error(&res); } } return (res); } static int ntfs_fuse_chownmod(struct SECURITY_CONTEXT *scx, fuse_ino_t ino, uid_t uid, gid_t gid, mode_t mode, struct stat *stbuf) { ntfs_inode *ni; int res; if (!scx->mapping[MAPUSERS] && !ctx->silent && ((uid != ctx->uid) || (gid != ctx->gid))) res = -EOPNOTSUPP; else { res = 0; ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) res = -errno; else { if (scx->mapping[MAPUSERS]) { if (ntfs_set_ownmod(scx, ni, uid, gid, mode)) res = -errno; else { ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); /* * Must return updated times, and * inode has been updated, so hope * we get no further errors */ res = ntfs_fuse_getstat(scx, ni, stbuf); } } else res = ntfs_fuse_getstat(scx, ni, stbuf); if (ntfs_inode_close(ni)) set_fuse_error(&res); } } return (res); } static int ntfs_fuse_trunc(struct SECURITY_CONTEXT *scx, fuse_ino_t ino, #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) off_t size, BOOL chkwrite, struct stat *stbuf) #else off_t size, BOOL chkwrite __attribute__((unused)), struct stat *stbuf) #endif { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; int res; s64 oldsize; ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) goto exit; na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0); if (!na) goto exit; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* * deny truncation if cannot write to file * (already checked for ftruncate()) */ if (scx->mapping[MAPUSERS] && chkwrite && !ntfs_allowed_access(scx, ni, S_IWRITE)) { errno = EACCES; goto exit; } #endif /* * for compressed files, only deleting contents and expanding * are implemented. Expanding is done by inserting a final * zero, which is optimized as creating a hole when possible. */ if ((na->data_flags & ATTR_COMPRESSION_MASK) && size && (size < na->initialized_size)) { errno = EOPNOTSUPP; goto exit; } 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); ntfs_fuse_update_times(na->ni, NTFS_UPDATE_MCTIME); res = ntfs_fuse_getstat(scx, ni, stbuf); errno = (res ? -res : 0); exit: res = -errno; ntfs_attr_close(na); if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } static int ntfs_fuse_utime(struct SECURITY_CONTEXT *scx, fuse_ino_t ino, struct stat *stin, struct stat *stbuf) { ntfs_inode *ni; int res = 0; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) BOOL ownerok; BOOL writeok; #endif ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) return -errno; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) ownerok = ntfs_allowed_as_owner(scx, ni); if (stin) { /* * 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 && (stin->st_atime == stin->st_mtime) && ntfs_allowed_access(scx, ni, S_IWRITE); /* Must be owner */ if (!ownerok && !writeok) res = (stin->st_atime == stin->st_mtime ? -EACCES : -EPERM); else { ni->last_access_time = stin->st_atime; ni->last_data_change_time = stin->st_mtime; ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); } } else { /* Must be owner or have write access */ writeok = !ownerok && ntfs_allowed_access(scx, ni, S_IWRITE); if (!ownerok && !writeok) res = -EACCES; else ntfs_inode_update_times(ni, NTFS_UPDATE_AMCTIME); } #else if (stin) { ni->last_access_time = stin->st_atime; ni->last_data_change_time = stin->st_mtime; ntfs_fuse_update_times(ni, NTFS_UPDATE_CTIME); } else ntfs_inode_update_times(ni, NTFS_UPDATE_AMCTIME); #endif res = ntfs_fuse_getstat(scx, ni, stbuf); if (ntfs_inode_close(ni)) set_fuse_error(&res); return res; } static void ntfs_fuse_setattr(fuse_req_t req, fuse_ino_t ino, struct stat *attr, int to_set, struct fuse_file_info *fi __attribute__((unused))) { struct stat stbuf; ntfs_inode *ni; int res; struct SECURITY_CONTEXT security; ntfs_fuse_fill_security_context(req, &security); switch (to_set & (FUSE_SET_ATTR_MODE | FUSE_SET_ATTR_UID | FUSE_SET_ATTR_GID | FUSE_SET_ATTR_SIZE | FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME)) { case 0 : ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) res = -errno; else { res = ntfs_fuse_getstat(&security, ni, &stbuf); if (ntfs_inode_close(ni)) set_fuse_error(&res); } break; case FUSE_SET_ATTR_MODE : res = ntfs_fuse_chmod(&security, ino, attr->st_mode & 07777, &stbuf); break; case FUSE_SET_ATTR_UID : res = ntfs_fuse_chown(&security, ino, attr->st_uid, (gid_t)-1, &stbuf); break; case FUSE_SET_ATTR_GID : res = ntfs_fuse_chown(&security, ino, (uid_t)-1, attr->st_gid, &stbuf); break; case FUSE_SET_ATTR_UID + FUSE_SET_ATTR_GID : res = ntfs_fuse_chown(&security, ino, attr->st_uid, attr->st_gid, &stbuf); break; case FUSE_SET_ATTR_UID + FUSE_SET_ATTR_MODE: res = ntfs_fuse_chownmod(&security, ino, attr->st_uid, (gid_t)-1,attr->st_mode, &stbuf); break; case FUSE_SET_ATTR_GID + FUSE_SET_ATTR_MODE: res = ntfs_fuse_chownmod(&security, ino, (uid_t)-1, attr->st_gid,attr->st_mode, &stbuf); break; case FUSE_SET_ATTR_UID + FUSE_SET_ATTR_GID + FUSE_SET_ATTR_MODE: res = ntfs_fuse_chownmod(&security, ino, attr->st_uid, attr->st_gid,attr->st_mode, &stbuf); break; case FUSE_SET_ATTR_SIZE : res = ntfs_fuse_trunc(&security, ino, attr->st_size, !fi, &stbuf); break; case FUSE_SET_ATTR_ATIME + FUSE_SET_ATTR_MTIME : res = ntfs_fuse_utime(&security, ino, attr, &stbuf); break; default: ntfs_log_error("Unsupported setattr mode 0x%x\n",(int)to_set); res = -EOPNOTSUPP; break; } if (res) fuse_reply_err(req, -res); else fuse_reply_attr(req, &stbuf, ATTR_TIMEOUT); } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) static void ntfs_fuse_access(fuse_req_t req, fuse_ino_t ino, int mask) { int res = 0; int mode; ntfs_inode *ni; struct SECURITY_CONTEXT security; /* JPA return unsupported if no user mapping has been defined */ if (!ntfs_fuse_fill_security_context(req, &security)) { if (ctx->silent) res = 0; else res = -EOPNOTSUPP; } else { ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; } else { mode = 0; if (mask & (X_OK | W_OK | R_OK)) { if (mask & X_OK) mode += S_IEXEC; if (mask & W_OK) mode += S_IWRITE; if (mask & R_OK) mode += S_IREAD; if (!ntfs_allowed_access(&security, ni, mode)) res = -errno; } if (ntfs_inode_close(ni)) set_fuse_error(&res); } } if (res < 0) fuse_reply_err(req, -res); else fuse_reply_err(req, 0); } #endif /* !KERNELPERMS | (POSIXACLS & !KERNELACLS) */ static int ntfs_fuse_create(fuse_req_t req, fuse_ino_t parent, const char *name, mode_t typemode, dev_t dev, struct fuse_entry_param *e, const char *target, struct fuse_file_info *fi) { ntfschar *uname = NULL, *utarget = NULL; ntfs_inode *dir_ni = NULL, *ni; struct open_file *of; int state = 0; le32 securid; mode_t type = typemode & ~07777; mode_t perm; struct SECURITY_CONTEXT security; int res = 0, uname_len, utarget_len; /* Generate unicode filename. */ uname_len = ntfs_mbstoucs(name, &uname); if (uname_len < 0) { res = -errno; goto exit; } /* Open parent directory. */ dir_ni = ntfs_inode_open(ctx->vol, INODE(parent)); if (!dir_ni) { res = -errno; goto exit; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* make sure parent directory is writeable and executable */ if (!ntfs_fuse_fill_security_context(req, &security) || ntfs_allowed_access(&security, dir_ni,S_IWRITE + S_IEXEC)) { #else ntfs_fuse_fill_security_context(req, &security); #endif if (S_ISDIR(type)) perm = typemode & ~ctx->dmask & 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, security.gid, dir_ni, perm, S_ISDIR(type)); #else securid = ntfs_alloc_securid(&security, security.uid, security.gid, perm & ~security.umask, S_ISDIR(type)); #endif /* Create object specified in @type. */ 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, security.gid, dir_ni, perm) < 0) set_fuse_error(&res); #else if (!securid && ntfs_set_owner_mode(&security, ni, security.uid, security.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)) { state |= CLOSE_COMPRESSED; } /* mark a future need to fixup encrypted inode */ if (fi && ctx->efs_raw && (ni->flags & FILE_ATTR_ENCRYPTED)) state |= CLOSE_ENCRYPTED; ntfs_inode_update_mbsname(dir_ni, name, ni->mft_no); NInoSetDirty(ni); e->ino = ni->mft_no; e->generation = 1; e->attr_timeout = ATTR_TIMEOUT; e->entry_timeout = ENTRY_TIMEOUT; res = ntfs_fuse_getstat(&security, ni, &e->attr); /* * 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 exit: free(uname); if (ntfs_inode_close(dir_ni)) set_fuse_error(&res); if (utarget) free(utarget); if ((res >= 0) && fi) { of = (struct open_file*)malloc(sizeof(struct open_file)); if (of) { of->parent = 0; of->ino = e->ino; of->state = state; of->next = ctx->open_files; of->previous = (struct open_file*)NULL; if (ctx->open_files) ctx->open_files->previous = of; ctx->open_files = of; fi->fh = (long)of; } } return res; } static void ntfs_fuse_create_file(fuse_req_t req, fuse_ino_t parent, const char *name, mode_t mode, struct fuse_file_info *fi) { int res; struct fuse_entry_param entry; res = ntfs_fuse_create(req, parent, name, mode & (S_IFMT | 07777), 0, &entry, NULL, fi); if (res < 0) fuse_reply_err(req, -res); else fuse_reply_create(req, &entry, fi); } static void ntfs_fuse_mknod(fuse_req_t req, fuse_ino_t parent, const char *name, mode_t mode, dev_t rdev) { int res; struct fuse_entry_param e; res = ntfs_fuse_create(req, parent, name, mode & (S_IFMT | 07777), rdev, &e,NULL,(struct fuse_file_info*)NULL); if (res < 0) fuse_reply_err(req, -res); else fuse_reply_entry(req, &e); } static void ntfs_fuse_symlink(fuse_req_t req, const char *target, fuse_ino_t parent, const char *name) { int res; struct fuse_entry_param entry; res = ntfs_fuse_create(req, parent, name, S_IFLNK, 0, &entry, target, (struct fuse_file_info*)NULL); if (res < 0) fuse_reply_err(req, -res); else fuse_reply_entry(req, &entry); } static int ntfs_fuse_newlink(fuse_req_t req __attribute__((unused)), fuse_ino_t ino, fuse_ino_t newparent, const char *newname, struct fuse_entry_param *e) { ntfschar *uname = NULL; ntfs_inode *dir_ni = NULL, *ni; int res = 0, uname_len; struct SECURITY_CONTEXT security; /* Open file for which create hard link. */ ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; goto exit; } /* Generate unicode filename. */ uname_len = ntfs_mbstoucs(newname, &uname); if (uname_len < 0) { res = -errno; goto exit; } /* Open parent directory. */ dir_ni = ntfs_inode_open(ctx->vol, INODE(newparent)); if (!dir_ni) { res = -errno; goto exit; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* make sure the target parent directory is writeable */ if (ntfs_fuse_fill_security_context(req, &security) && !ntfs_allowed_access(&security,dir_ni,S_IWRITE + S_IEXEC)) res = -EACCES; else #else ntfs_fuse_fill_security_context(req, &security); #endif { if (ntfs_link(ni, dir_ni, uname, uname_len)) { res = -errno; goto exit; } ntfs_inode_update_mbsname(dir_ni, newname, ni->mft_no); if (e) { e->ino = ni->mft_no; e->generation = 1; e->attr_timeout = ATTR_TIMEOUT; e->entry_timeout = ENTRY_TIMEOUT; res = ntfs_fuse_getstat(&security, ni, &e->attr); } 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); return (res); } static void ntfs_fuse_link(fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent, const char *newname) { struct fuse_entry_param entry; int res; res = ntfs_fuse_newlink(req, ino, newparent, newname, &entry); if (res) fuse_reply_err(req, -res); else fuse_reply_entry(req, &entry); } static int ntfs_fuse_rm(fuse_req_t req, fuse_ino_t parent, const char *name) { ntfschar *uname = NULL; ntfs_inode *dir_ni = NULL, *ni = NULL; int res = 0, uname_len; u64 iref; fuse_ino_t ino; struct open_file *of; char ghostname[GHOSTLTH]; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif /* Open parent directory. */ dir_ni = ntfs_inode_open(ctx->vol, INODE(parent)); if (!dir_ni) { res = -errno; goto exit; } /* Generate unicode filename. */ uname_len = ntfs_mbstoucs(name, &uname); if (uname_len < 0) { res = -errno; goto exit; } /* Open object for delete. */ iref = ntfs_inode_lookup_by_mbsname(dir_ni, name); if (iref == (u64)-1) { res = -errno; goto exit; } { /* temporary */ struct open_file *prev = (struct open_file*)NULL; for (of=ctx->open_files; of; of=of->next) { if (of->previous != prev) ntfs_log_error("bad chaining\n"); prev = of; } } of = ctx->open_files; ino = (fuse_ino_t)MREF(iref); /* improvable search in open files list... */ while (of && (of->ino != ino)) of = of->next; if (of && !(of->state & CLOSE_GHOST)) { /* file was open, create a ghost in unlink parent */ of->state |= CLOSE_GHOST; of->parent = parent; of->ghost = ++ctx->latest_ghost; sprintf(ghostname,ghostformat,of->ghost); /* need to close the dir for linking the ghost */ if (ntfs_inode_close(dir_ni)) { res = -errno; goto out; } /* sweep existing ghost if any */ ntfs_fuse_rm(req, parent, ghostname); res = ntfs_fuse_newlink(req, of->ino, parent, ghostname, (struct fuse_entry_param*)NULL); if (res) goto out; /* now reopen then parent directory */ dir_ni = ntfs_inode_open(ctx->vol, INODE(parent)); if (!dir_ni) { res = -errno; goto exit; } } ni = ntfs_inode_open(ctx->vol, MREF(iref)); if (!ni) { res = -errno; goto exit; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* JPA deny unlinking if directory is not writable and executable */ if (!ntfs_fuse_fill_security_context(req, &security) || ntfs_allowed_dir_access(&security, dir_ni, ino, ni, S_IEXEC + S_IWRITE + S_ISVTX)) { #endif if (ntfs_delete(ctx->vol, (char*)NULL, 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(ni)) set_fuse_error(&res); if (ntfs_inode_close(dir_ni)) set_fuse_error(&res); out : free(uname); return res; } static void ntfs_fuse_unlink(fuse_req_t req, fuse_ino_t parent, const char *name) { int res; res = ntfs_fuse_rm(req, parent, name); if (res) fuse_reply_err(req, -res); else fuse_reply_err(req, 0); } static int ntfs_fuse_safe_rename(fuse_req_t req, fuse_ino_t ino, fuse_ino_t parent, const char *name, fuse_ino_t xino, fuse_ino_t newparent, const char *newname, const char *tmp) { int ret; ntfs_log_trace("Entering\n"); ret = ntfs_fuse_newlink(req, xino, newparent, tmp, (struct fuse_entry_param*)NULL); if (ret) return ret; ret = ntfs_fuse_rm(req, newparent, newname); if (!ret) { ret = ntfs_fuse_newlink(req, ino, newparent, newname, (struct fuse_entry_param*)NULL); if (ret) goto restore; ret = ntfs_fuse_rm(req, parent, name); if (ret) { if (ntfs_fuse_rm(req, newparent, newname)) goto err; goto restore; } } goto cleanup; restore: if (ntfs_fuse_newlink(req, xino, newparent, newname, (struct fuse_entry_param*)NULL)) { err: ntfs_log_perror("Rename failed. Existing file '%s' was renamed " "to '%s'", newname, 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_rm(req, newparent, tmp) < 0) ntfs_log_perror("Rename failed. Existing file '%s' still present " "as '%s'", newname, tmp); } return ret; } static int ntfs_fuse_rename_existing_dest(fuse_req_t req, fuse_ino_t ino, fuse_ino_t parent, const char *name, fuse_ino_t xino, fuse_ino_t newparent, const char *newname) { int ret, len; char *tmp; const char *ext = ".ntfs-3g-"; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) ntfs_inode *newdir_ni; struct SECURITY_CONTEXT security; #endif ntfs_log_trace("Entering\n"); len = strlen(newname) + strlen(ext) + 10 + 1; /* wc(str(2^32)) + \0 */ tmp = (char*)ntfs_malloc(len); if (!tmp) return -errno; ret = snprintf(tmp, len, "%s%s%010d", newname, 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 */ newdir_ni = ntfs_inode_open(ctx->vol, INODE(newparent)); if (newdir_ni) { if (!ntfs_fuse_fill_security_context(req,&security) || ntfs_allowed_dir_access(&security, newdir_ni, xino, (ntfs_inode*)NULL, S_IEXEC + S_IWRITE + S_ISVTX)) { if (ntfs_inode_close(newdir_ni)) ret = -errno; else ret = ntfs_fuse_safe_rename(req, ino, parent, name, xino, newparent, newname, tmp); } else { ntfs_inode_close(newdir_ni); ret = -EACCES; } } else ret = -errno; #else ret = ntfs_fuse_safe_rename(req, ino, parent, name, xino, newparent, newname, tmp); #endif } free(tmp); return ret; } static void ntfs_fuse_rename(fuse_req_t req, fuse_ino_t parent, const char *name, fuse_ino_t newparent, const char *newname) { int ret; fuse_ino_t ino; fuse_ino_t xino; ntfs_inode *ni; ntfs_log_debug("rename: old: '%s' new: '%s'\n", name, newname); /* * FIXME: Rename should be atomic. */ ino = ntfs_fuse_inode_lookup(parent, name); if (ino == (fuse_ino_t)-1) { ret = -errno; goto out; } /* Check whether target is present */ xino = ntfs_fuse_inode_lookup(newparent, newname); if (xino != (fuse_ino_t)-1) { /* * Target exists : no need to check whether it * designates the same inode, this has already * been checked (by fuse ?) */ ni = ntfs_inode_open(ctx->vol, INODE(xino)); if (!ni) ret = -errno; else { ret = ntfs_check_empty_dir(ni); if (ret < 0) { ret = -errno; ntfs_inode_close(ni); goto out; } if (ntfs_inode_close(ni)) { set_fuse_error(&ret); goto out; } ret = ntfs_fuse_rename_existing_dest(req, ino, parent, name, xino, newparent, newname); } } else { /* target does not exist */ ret = ntfs_fuse_newlink(req, ino, newparent, newname, (struct fuse_entry_param*)NULL); if (ret) goto out; ret = ntfs_fuse_rm(req, parent, name); if (ret) ntfs_fuse_rm(req, newparent, newname); } out: if (ret) fuse_reply_err(req, -ret); else fuse_reply_err(req, 0); } static void ntfs_fuse_release(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) { ntfs_inode *ni = NULL; ntfs_attr *na = NULL; struct open_file *of; char ghostname[GHOSTLTH]; int res; of = (struct open_file*)(long)fi->fh; /* Only for marked descriptors there is something to do */ if (!of || !(of->state & (CLOSE_COMPRESSED | CLOSE_ENCRYPTED))) { res = 0; goto out; } ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; goto exit; } na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0); if (!na) { res = -errno; goto exit; } res = 0; if (of->state & CLOSE_COMPRESSED) res = ntfs_attr_pclose(na); if (of->state & CLOSE_ENCRYPTED) res = ntfs_efs_fixup_attribute(NULL, na); exit: if (na) ntfs_attr_close(na); if (ntfs_inode_close(ni)) set_fuse_error(&res); out: /* remove the associate ghost file (even if release failed) */ if (of) { if (of->state & CLOSE_GHOST) { sprintf(ghostname,ghostformat,of->ghost); ntfs_fuse_rm(req, of->parent, ghostname); } /* remove from open files list */ if (of->next) of->next->previous = of->previous; if (of->previous) of->previous->next = of->next; else ctx->open_files = of->next; free(of); } if (res) fuse_reply_err(req, -res); else fuse_reply_err(req, 0); } static void ntfs_fuse_mkdir(fuse_req_t req, fuse_ino_t parent, const char *name, mode_t mode) { int res; struct fuse_entry_param entry; res = ntfs_fuse_create(req, parent, name, S_IFDIR | (mode & 07777), 0, &entry, (char*)NULL, (struct fuse_file_info*)NULL); if (res < 0) fuse_reply_err(req, -res); else fuse_reply_entry(req, &entry); } static void ntfs_fuse_rmdir(fuse_req_t req, fuse_ino_t parent, const char *name) { int res; res = ntfs_fuse_rm(req, parent, name); if (res) fuse_reply_err(req, -res); else fuse_reply_err(req, 0); } static void ntfs_fuse_bmap(fuse_req_t req, fuse_ino_t ino, size_t blocksize, uint64_t vidx) { ntfs_inode *ni; ntfs_attr *na; LCN lcn; uint64_t lidx = 0; int ret = 0; int cl_per_bl = ctx->vol->cluster_size / blocksize; if (blocksize > ctx->vol->cluster_size) { ret = -EINVAL; goto done; } ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { ret = -errno; goto done; } 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, vidx / cl_per_bl); lidx = (lcn > 0) ? lcn * cl_per_bl + vidx % cl_per_bl : 0; close_attr: ntfs_attr_close(na); close_inode: if (ntfs_inode_close(ni)) set_fuse_error(&ret); done : if (ret < 0) fuse_reply_err(req, -ret); else fuse_reply_bmap(req, lidx); } #ifdef HAVE_SETXATTR /* * Name space identifications and prefixes */ enum { XATTRNS_NONE, XATTRNS_USER, XATTRNS_SYSTEM, XATTRNS_SECURITY, XATTRNS_TRUSTED, XATTRNS_OPEN } ; static const char nf_ns_user_prefix[] = "user."; static const int nf_ns_user_prefix_len = sizeof(nf_ns_user_prefix) - 1; static const char nf_ns_system_prefix[] = "system."; static const int nf_ns_system_prefix_len = sizeof(nf_ns_system_prefix) - 1; static const char nf_ns_security_prefix[] = "security."; static const int nf_ns_security_prefix_len = sizeof(nf_ns_security_prefix) - 1; static const char nf_ns_trusted_prefix[] = "trusted."; static const int nf_ns_trusted_prefix_len = sizeof(nf_ns_trusted_prefix) - 1; static const char xattr_ntfs_3g[] = "ntfs-3g."; /* * Identification of data mapped to the system name space */ enum { XATTR_UNMAPPED, XATTR_NTFS_ACL, XATTR_NTFS_ATTRIB, XATTR_NTFS_EFSINFO, XATTR_NTFS_REPARSE_DATA, XATTR_NTFS_OBJECT_ID, XATTR_NTFS_DOS_NAME, XATTR_NTFS_TIMES, XATTR_POSIX_ACC, XATTR_POSIX_DEF } ; static const char nf_ns_xattr_ntfs_acl[] = "system.ntfs_acl"; static const char nf_ns_xattr_attrib[] = "system.ntfs_attrib"; static const char nf_ns_xattr_efsinfo[] = "user.ntfs.efsinfo"; static const char nf_ns_xattr_reparse[] = "system.ntfs_reparse_data"; static const char nf_ns_xattr_object_id[] = "system.ntfs_object_id"; static const char nf_ns_xattr_dos_name[] = "system.ntfs_dos_name"; static const char nf_ns_xattr_times[] = "system.ntfs_times"; static const char nf_ns_xattr_posix_access[] = "system.posix_acl_access"; static const char nf_ns_xattr_posix_default[] = "system.posix_acl_default"; struct XATTRNAME { int xattr; const char *name; } ; static struct XATTRNAME nf_ns_xattr_names[] = { { XATTR_NTFS_ACL, nf_ns_xattr_ntfs_acl }, { XATTR_NTFS_ATTRIB, nf_ns_xattr_attrib }, { XATTR_NTFS_EFSINFO, nf_ns_xattr_efsinfo }, { XATTR_NTFS_REPARSE_DATA, nf_ns_xattr_reparse }, { XATTR_NTFS_OBJECT_ID, nf_ns_xattr_object_id }, { XATTR_NTFS_DOS_NAME, nf_ns_xattr_dos_name }, { XATTR_NTFS_TIMES, nf_ns_xattr_times }, { XATTR_POSIX_ACC, nf_ns_xattr_posix_access }, { XATTR_POSIX_DEF, nf_ns_xattr_posix_default }, { XATTR_UNMAPPED, (char*)NULL } /* terminator */ }; /* * 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(fuse_req_t req, struct SECURITY_CONTEXT *security, fuse_ino_t ino, int attr, BOOL setting) { ntfs_inode *dir_ni; ntfs_inode *ni; BOOL foracl; BOOL bad; mode_t acctype; ni = (ntfs_inode*)NULL; 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. * However no error will be returned to getfacl */ if ((!ntfs_fuse_fill_security_context(req, security) || (ctx->secure_flags & ((1 << SECURITY_DEFAULT) | (1 << SECURITY_RAW)))) && foracl) { 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; ni = ntfs_inode_open(ctx->vol, INODE(ino)); /* basic access was checked previously in a lookup */ if (ni && (acctype != S_IEXEC)) { bad = FALSE; /* do not reopen root */ if (ni->mft_no == FILE_root) { /* forbid getting/setting names on root */ if ((attr == XATTR_NTFS_DOS_NAME) || !ntfs_real_allowed_access(security, ni, acctype)) bad = TRUE; } else { dir_ni = ntfs_dir_parent_inode(ni); if (dir_ni) { if (!ntfs_real_allowed_access(security, dir_ni, acctype)) bad = TRUE; if (ntfs_inode_close(dir_ni)) bad = TRUE; } else bad = TRUE; } if (bad) { ntfs_inode_close(ni); ni = (ntfs_inode*)NULL; } } } return (ni); } /* * Determine whether an extended attribute is in the system * name space and mapped to internal data */ static int mapped_xattr_system(const char *name) { struct XATTRNAME *p; p = nf_ns_xattr_names; while (p->name && strcmp(p->name,name)) p++; return (p->xattr); } /* * 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 = (char*)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 void ntfs_fuse_listxattr(fuse_req_t req, fuse_ino_t ino, size_t size) { ntfs_attr_search_ctx *actx = NULL; ntfs_inode *ni; char *to; char *list = (char*)NULL; int ret = 0; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) ntfs_fuse_fill_security_context(req, &security); #endif ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { ret = -errno; goto out; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* file must be readable */ // condition on fill_security ? 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 (size) { list = (char*)malloc(size); if (!list) { ret = -errno; goto exit; } } to = list; if ((ctx->streams == NF_STREAMS_INTERFACE_XATTR) || (ctx->streams == NF_STREAMS_INTERFACE_OPENXATTR)) { 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; } /* * When using name spaces, do not return * security, trusted nor system attributes * (filtered elsewhere anyway) * otherwise insert "user." prefix */ if (ctx->streams == NF_STREAMS_INTERFACE_XATTR) { if ((strlen(tmp_name) > sizeof(xattr_ntfs_3g)) && !strncmp(tmp_name,xattr_ntfs_3g, sizeof(xattr_ntfs_3g)-1)) tmp_name_len = 0; else ret += tmp_name_len + nf_ns_user_prefix_len + 1; } else ret += tmp_name_len + 1; if (size && tmp_name_len) { if ((size_t)ret <= size) { if (ctx->streams == NF_STREAMS_INTERFACE_XATTR) { strcpy(to, nf_ns_user_prefix); to += nf_ns_user_prefix_len; } strncpy(to, tmp_name, tmp_name_len); to += tmp_name_len; *to = 0; to++; } else { free(tmp_name); ret = -ERANGE; goto exit; } } free(tmp_name); } } /* List efs info xattr for encrypted files */ if (ctx->efs_raw && (ni->flags & FILE_ATTR_ENCRYPTED)) { ret += sizeof(nf_ns_xattr_efsinfo); if ((size_t)ret <= size) { memcpy(to, nf_ns_xattr_efsinfo, sizeof(nf_ns_xattr_efsinfo)); to += sizeof(nf_ns_xattr_efsinfo); } } if (errno != ENOENT) ret = -errno; exit: if (actx) ntfs_attr_put_search_ctx(actx); if (ntfs_inode_close(ni)) set_fuse_error(&ret); out : if (ret < 0) fuse_reply_err(req, -ret); else if (size) fuse_reply_buf(req, list, ret); else fuse_reply_xattr(req, ret); free(list); } static __inline__ int ntfs_system_getxattr(struct SECURITY_CONTEXT *scx, int attr, ntfs_inode *ni, char *value, size_t size) { int res; ntfs_inode *dir_ni; /* * the returned value is the needed * size. If it is too small, no copy * is done, and the caller has to * issue a new call with correct size. */ switch (attr) { case XATTR_NTFS_ACL : res = ntfs_get_ntfs_acl(scx, ni, value, size); break; #if POSIXACLS case XATTR_POSIX_ACC : res = ntfs_get_posix_acl(scx, ni, nf_ns_xattr_posix_access, value, size); break; case XATTR_POSIX_DEF : res = ntfs_get_posix_acl(scx, ni, nf_ns_xattr_posix_default, value, size); break; #endif case XATTR_NTFS_ATTRIB : res = ntfs_get_ntfs_attrib(ni, value, size); break; case XATTR_NTFS_EFSINFO : if (ctx->efs_raw) res = ntfs_get_efs_info(ni, value, size); else res = -EPERM; break; case XATTR_NTFS_REPARSE_DATA : res = ntfs_get_ntfs_reparse_data(ni, value, size); break; case XATTR_NTFS_OBJECT_ID : res = ntfs_get_ntfs_object_id(ni, value, size); break; case XATTR_NTFS_DOS_NAME: dir_ni = ntfs_dir_parent_inode(ni); if (dir_ni) { res = ntfs_get_ntfs_dos_name(ni, dir_ni, value, size); if (ntfs_inode_close(dir_ni)) set_fuse_error(&res); } else res = -errno; break; case XATTR_NTFS_TIMES: res = ntfs_inode_get_times(ni, value, size); break; default : errno = EOPNOTSUPP; res = -errno; break; } return (res); } static void ntfs_fuse_getxattr(fuse_req_t req, fuse_ino_t ino, const char *name, size_t size) { ntfs_inode *ni; ntfs_attr *na = NULL; char *value = (char*)NULL; ntfschar *lename = (ntfschar*)NULL; int lename_len; int res; s64 rsize; int attr; int namespace; struct SECURITY_CONTEXT security; attr = mapped_xattr_system(name); if (attr != XATTR_UNMAPPED) { /* * hijack internal data and ACL retrieval, whatever * mode was selected for xattr (from the user's * point of view, ACLs are not xattr) */ if (size) value = (char*)ntfs_malloc(size); #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) if (!size || value) { ni = ntfs_check_access_xattr(req, &security, ino, attr, FALSE); if (ni) { if (ntfs_allowed_access(&security,ni,S_IREAD)) res = ntfs_system_getxattr(&security, attr, ni, value, size); else res = -errno; if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; } #else /* * Standard access control has been done by fuse/kernel */ if (!size || value) { ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (ni) { /* user mapping not mandatory */ ntfs_fuse_fill_security_context(req, &security); res = ntfs_system_getxattr(&security, attr, ni, value, size); if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; } else res = -errno; #endif if (res < 0) fuse_reply_err(req, -res); else if (size) fuse_reply_buf(req, value, res); else fuse_reply_xattr(req, res); free(value); return; } if (ctx->streams == NF_STREAMS_INTERFACE_NONE) { res = -EOPNOTSUPP; goto out; } if (ctx->streams == NF_STREAMS_INTERFACE_NONE) { res = -EOPNOTSUPP; goto out; } namespace = xattr_namespace(name); if (namespace == XATTRNS_NONE) { res = -EOPNOTSUPP; goto out; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) ntfs_fuse_fill_security_context(req,&security); /* trusted only readable by root */ if ((namespace == XATTRNS_TRUSTED) && security.uid) { res = -EPERM; goto out; } #endif ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; goto out; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) /* file must be readable */ // condition on fill_security 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 = -ENODATA; goto exit; } rsize = na->data_size; if (ctx->efs_raw && (na->data_flags & ATTR_IS_ENCRYPTED) && NAttrNonResident(na)) rsize = ((na->data_size + 511) & ~511)+2; if (size) { if (size >= (size_t)rsize) { value = (char*)ntfs_malloc(rsize); if (value) res = ntfs_attr_pread(na, 0, rsize, value); if (!value || (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); out : if (res < 0) fuse_reply_err(req, -res); else if (size) fuse_reply_buf(req, value, res); else fuse_reply_xattr(req, res); free(value); } static __inline__ int ntfs_system_setxattr(struct SECURITY_CONTEXT *scx, int attr, ntfs_inode *ni, const char *value, size_t size, int flags) { int res; ntfs_inode *dir_ni; switch (attr) { case XATTR_NTFS_ACL : res = ntfs_set_ntfs_acl(scx, ni, value, size, flags); break; #if POSIXACLS case XATTR_POSIX_ACC : res = ntfs_set_posix_acl(scx ,ni , nf_ns_xattr_posix_access, value, size, flags); break; case XATTR_POSIX_DEF : res = ntfs_set_posix_acl(scx, ni, nf_ns_xattr_posix_default, value, size, flags); break; #endif case XATTR_NTFS_ATTRIB : res = ntfs_set_ntfs_attrib(ni, value, size, flags); break; case XATTR_NTFS_EFSINFO : if (ctx->efs_raw) res = ntfs_set_efs_info(ni, value, size, flags); else res = -EPERM; break; case XATTR_NTFS_REPARSE_DATA : res = ntfs_set_ntfs_reparse_data(ni, value, size, flags); break; case XATTR_NTFS_OBJECT_ID : res = ntfs_set_ntfs_object_id(ni, value, size, flags); break; case XATTR_NTFS_DOS_NAME: dir_ni = ntfs_dir_parent_inode(ni); if (dir_ni) /* warning : this closes both inodes */ res = ntfs_set_ntfs_dos_name(ni, dir_ni, value, size, flags); else res = -errno; break; case XATTR_NTFS_TIMES: res = ntfs_inode_set_times(ni, value, size, flags); break; default : errno = EOPNOTSUPP; res = -errno; break; } return (res); } static void ntfs_fuse_setxattr(fuse_req_t req, fuse_ino_t ino, const char *name, const char *value, size_t size, int flags) { ntfs_inode *ni; ntfs_attr *na = NULL; ntfschar *lename = NULL; int res, lename_len; size_t part, total; int attr; int namespace; struct SECURITY_CONTEXT security; attr = mapped_xattr_system(name); if (attr != XATTR_UNMAPPED) { /* * hijack internal data and ACL setting, whatever * mode was selected for xattr (from the user's * point of view, ACLs are not xattr) * Note : updating an ACL does not set ctime */ #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) ni = ntfs_check_access_xattr(req,&security,ino,attr,TRUE); if (ni) { if (ntfs_allowed_as_owner(&security, ni)) { res = ntfs_system_setxattr(&security, attr, ni, value, size, flags); if (res) res = -errno; } else res = -errno; if ((attr != XATTR_NTFS_DOS_NAME) && ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; #else /* creation of a new name is not controlled by fuse */ if (attr == XATTR_NTFS_DOS_NAME) ni = ntfs_check_access_xattr(req, &security, ino, attr, TRUE); else ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (ni) { /* * user mapping is not mandatory * if defined, only owner is allowed */ if (!ntfs_fuse_fill_security_context(req, &security) || ntfs_allowed_as_owner(&security, ni)) { res = ntfs_system_setxattr(&security, attr, ni, value, size, flags); if (res) res = -errno; } else res = -errno; if ((attr != XATTR_NTFS_DOS_NAME) && ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; #endif if (res < 0) fuse_reply_err(req, -res); else fuse_reply_err(req, 0); return; } if ((ctx->streams != NF_STREAMS_INTERFACE_XATTR) && (ctx->streams != NF_STREAMS_INTERFACE_OPENXATTR)) { res = -EOPNOTSUPP; goto out; } namespace = xattr_namespace(name); if (namespace == XATTRNS_NONE) { res = -EOPNOTSUPP; goto out; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) ntfs_fuse_fill_security_context(req,&security); /* security and trusted only settable by root */ if (((namespace == XATTRNS_SECURITY) || (namespace == XATTRNS_TRUSTED)) && security.uid) { res = -EPERM; goto out; } #endif ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; goto out; } #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 : if (!ntfs_allowed_access(&security,ni,S_IWRITE)) { res = -EACCES; goto exit; } break; } #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 && flags == XATTR_CREATE) { res = -EEXIST; goto exit; } if (!na) { if (flags == XATTR_REPLACE) { res = -ENODATA; goto exit; } if (ntfs_attr_add(ni, AT_DATA, lename, lename_len, NULL, 0)) { res = -errno; goto exit; } set_archive(ni); na = ntfs_attr_open(ni, AT_DATA, lename, lename_len); if (!na) { res = -errno; goto exit; } } else { /* currently compressed streams can only be wiped out */ if (ntfs_attr_truncate(na, (s64)0 /* size */)) { res = -errno; goto exit; } } total = 0; if (size) { do { part = ntfs_attr_pwrite(na, total, size - total, &value[total]); if (part > 0) total += part; } while ((part > 0) && (total < size)); if (total != size) res = -errno; else if (!(res = ntfs_attr_pclose(na))) if (ctx->efs_raw && (ni->flags & FILE_ATTR_ENCRYPTED)) res = ntfs_efs_fixup_attribute(NULL, na); if (total) set_archive(ni); } else res = 0; exit: if (na) ntfs_attr_close(na); free(lename); if (ntfs_inode_close(ni)) set_fuse_error(&res); out : if (res < 0) fuse_reply_err(req, -res); else fuse_reply_err(req, 0); } static __inline__ int ntfs_system_removexattr(fuse_req_t req, fuse_ino_t ino, int attr) { int res; ntfs_inode *dir_ni; ntfs_inode *ni; struct SECURITY_CONTEXT security; res = 0; switch (attr) { /* * Removal of NTFS ACL, ATTRIB, EFSINFO or TIMES * is never allowed */ case XATTR_NTFS_ACL : case XATTR_NTFS_ATTRIB : case XATTR_NTFS_EFSINFO : case XATTR_NTFS_TIMES : res = -EPERM; break; #if POSIXACLS case XATTR_POSIX_ACC : case XATTR_POSIX_DEF : ni = ntfs_check_access_xattr(req,&security,ino,attr,TRUE); if (ni) { if (!ntfs_allowed_as_owner(&security, ni) || ntfs_remove_posix_acl(&security, ni, (attr == XATTR_POSIX_ACC ? nf_ns_xattr_posix_access : nf_ns_xattr_posix_default))) res = -errno; if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; break; #endif case XATTR_NTFS_REPARSE_DATA : ni = ntfs_check_access_xattr(req, &security, ino, attr, TRUE); if (ni) { if (!ntfs_allowed_as_owner(&security, ni) || ntfs_remove_ntfs_reparse_data(ni)) res = -errno; if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; break; case XATTR_NTFS_OBJECT_ID : ni = ntfs_check_access_xattr(req, &security, ino, attr, TRUE); if (ni) { if (!ntfs_allowed_as_owner(&security, ni) || ntfs_remove_ntfs_object_id(ni)) res = -errno; if (ntfs_inode_close(ni)) set_fuse_error(&res); } else res = -errno; break; case XATTR_NTFS_DOS_NAME: ni = ntfs_check_access_xattr(req,&security,ino,attr,TRUE); if (ni) { dir_ni = ntfs_dir_parent_inode(ni); if (!dir_ni || ntfs_remove_ntfs_dos_name(ni,dir_ni)) res = -errno; } else res = -errno; break; default : errno = EOPNOTSUPP; res = -errno; break; } return (res); } static void ntfs_fuse_removexattr(fuse_req_t req, fuse_ino_t ino, const char *name) { ntfs_inode *ni; ntfschar *lename = NULL; int res = 0, lename_len; int attr; int namespace; #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) struct SECURITY_CONTEXT security; #endif attr = mapped_xattr_system(name); if (attr != XATTR_UNMAPPED) { /* * hijack internal data and ACL removal, whatever * mode was selected for xattr (from the user's * point of view, ACLs are not xattr) * Note : updating an ACL does not set ctime */ res = ntfs_system_removexattr(req, ino, attr); if (res < 0) fuse_reply_err(req, -res); else fuse_reply_err(req, 0); return; } if ((ctx->streams != NF_STREAMS_INTERFACE_XATTR) && (ctx->streams != NF_STREAMS_INTERFACE_OPENXATTR)) { res = -EOPNOTSUPP; goto out; } namespace = xattr_namespace(name); if (namespace == XATTRNS_NONE) { res = -EOPNOTSUPP; goto out; } #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) ntfs_fuse_fill_security_context(req,&security); /* security and trusted only settable by root */ if (((namespace == XATTRNS_SECURITY) || (namespace == XATTRNS_TRUSTED)) && security.uid) { res = -EACCES; goto out; } #endif ni = ntfs_inode_open(ctx->vol, INODE(ino)); if (!ni) { res = -errno; goto out; } #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 : if (!ntfs_allowed_access(&security,ni,S_IWRITE)) { res = -EACCES; goto exit; } break; } #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 = ENODATA; res = -errno; } set_archive(ni); exit: free(lename); if (ntfs_inode_close(ni)) set_fuse_error(&res); out : if (res < 0) fuse_reply_err(req, -res); else fuse_reply_err(req, 0); return; } #else #if POSIXACLS #error "Option inconsistency : POSIXACLS requires SETXATTR" #endif #endif /* HAVE_SETXATTR */ 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((fuse_req_t)NULL, &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_close_secure(&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 *notused __attribute__((unused))) { ntfs_close(); } static struct fuse_lowlevel_ops ntfs_3g_ops = { .lookup = ntfs_fuse_lookup, .getattr = ntfs_fuse_getattr, .readlink = ntfs_fuse_readlink, .opendir = ntfs_fuse_opendir, .readdir = ntfs_fuse_readdir, .releasedir = ntfs_fuse_releasedir, .open = ntfs_fuse_open, .release = ntfs_fuse_release, .read = ntfs_fuse_read, .write = ntfs_fuse_write, .setattr = ntfs_fuse_setattr, .statfs = ntfs_fuse_statfs, .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, .bmap = ntfs_fuse_bmap, .destroy = ntfs_fuse_destroy2, #if !KERNELPERMS | (POSIXACLS & !KERNELACLS) .access = ntfs_fuse_access, #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__) */ #if defined(FUSE_CAP_DONT_MASK) || (defined(__APPLE__) || defined(__DARWIN__)) .init = ntfs_init #endif }; static int ntfs_fuse_init(void) { ctx = (ntfs_fuse_context_t*)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 |= MS_EXCLUSIVE; if (ctx->ro) flags |= MS_RDONLY; if (ctx->recover) flags |= MS_RECOVER; if (ctx->hiberfile) flags |= MS_IGNORE_HIBERFILE; ctx->vol = ntfs_mount(device, flags); if (!ctx->vol) { ntfs_log_perror("Failed to mount '%s'", device); goto err_out; } ctx->vol->free_clusters = ntfs_attr_get_free_bits(ctx->vol->lcnbmp_na); if (ctx->vol->free_clusters < 0) { 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((fuse_req_t)NULL,FILE_root,"hiberfil.sys")) goto err_out; } errno = 0; err_out: return ntfs_volume_error(errno); } #define STRAPPEND_MAX_INSIZE 8192 #define strappend_is_large(x) ((x) > STRAPPEND_MAX_INSIZE) static int strappend(char **dest, const char *append) { char *p; size_t size_append, size_dest = 0; if (!dest) return -1; if (!append) return 0; size_append = strlen(append); if (*dest) size_dest = strlen(*dest); if (strappend_is_large(size_dest) || strappend_is_large(size_append)) { errno = EOVERFLOW; ntfs_log_perror("%s: Too large input buffer", EXEC_NAME); return -1; } p = (char*)realloc(*dest, size_dest + size_append + 1); if (!p) { ntfs_log_perror("%s: Memory reallocation failed", EXEC_NAME); return -1; } *dest = p; strcpy(*dest + size_dest, append); return 0; } static int bogus_option_value(char *val, const char *s) { if (val) { ntfs_log_error("'%s' option shouldn't have value.\n", s); return -1; } return 0; } static int missing_option_value(char *val, const char *s) { if (!val) { ntfs_log_error("'%s' option should have a value.\n", s); return -1; } return 0; } static char *parse_mount_options(const char *orig_opts) { char *options, *s, *opt, *val, *ret = NULL; BOOL no_def_opts = FALSE; int default_permissions = 0; int want_permissions = 0; ctx->secure_flags = 0; ctx->efs_raw = FALSE; options = strdup(orig_opts ? orig_opts : ""); if (!options) { ntfs_log_perror("%s: strdup failed", EXEC_NAME); return NULL; } s = options; while (s && *s && (val = strsep(&s, ","))) { opt = strsep(&val, "="); if (!strcmp(opt, "ro")) { /* Read-only mount. */ if (bogus_option_value(val, "ro")) goto err_exit; ctx->ro = TRUE; if (strappend(&ret, "ro,")) goto err_exit; } else if (!strcmp(opt, "noatime")) { if (bogus_option_value(val, "noatime")) goto err_exit; ctx->atime = ATIME_DISABLED; } else if (!strcmp(opt, "atime")) { if (bogus_option_value(val, "atime")) goto err_exit; ctx->atime = ATIME_ENABLED; } else if (!strcmp(opt, "relatime")) { if (bogus_option_value(val, "relatime")) goto err_exit; ctx->atime = ATIME_RELATIVE; } else if (!strcmp(opt, "fake_rw")) { if (bogus_option_value(val, "fake_rw")) goto err_exit; ctx->ro = TRUE; } else if (!strcmp(opt, "fsname")) { /* Filesystem name. */ /* * We need this to be able to check whether filesystem * mounted or not. */ ntfs_log_error("'fsname' is unsupported option.\n"); goto err_exit; } else if (!strcmp(opt, "no_def_opts")) { if (bogus_option_value(val, "no_def_opts")) goto err_exit; no_def_opts = TRUE; /* Don't add default options. */ } else if (!strcmp(opt, "default_permissions")) { default_permissions = 1; } else if (!strcmp(opt, "umask")) { if (missing_option_value(val, "umask")) goto err_exit; sscanf(val, "%o", &ctx->fmask); ctx->dmask = ctx->fmask; #if !POSIXACLS default_permissions = 1; #endif } else if (!strcmp(opt, "fmask")) { if (missing_option_value(val, "fmask")) goto err_exit; sscanf(val, "%o", &ctx->fmask); want_permissions = 1; } else if (!strcmp(opt, "dmask")) { if (missing_option_value(val, "dmask")) goto err_exit; sscanf(val, "%o", &ctx->dmask); want_permissions = 1; } else if (!strcmp(opt, "uid")) { if (missing_option_value(val, "uid")) goto err_exit; sscanf(val, "%i", &ctx->uid); want_permissions = 1; } else if (!strcmp(opt, "gid")) { if (missing_option_value(val, "gid")) goto err_exit; sscanf(val, "%i", &ctx->gid); want_permissions = 1; } else if (!strcmp(opt, "show_sys_files")) { if (bogus_option_value(val, "show_sys_files")) goto err_exit; ctx->show_sys_files = TRUE; } else if (!strcmp(opt, "silent")) { if (bogus_option_value(val, "silent")) goto err_exit; ctx->silent = TRUE; } else if (!strcmp(opt, "recover")) { if (bogus_option_value(val, "recover")) goto err_exit; ctx->recover = TRUE; } else if (!strcmp(opt, "norecover")) { if (bogus_option_value(val, "norecover")) goto err_exit; ctx->recover = FALSE; } else if (!strcmp(opt, "remove_hiberfile")) { if (bogus_option_value(val, "remove_hiberfile")) goto err_exit; ctx->hiberfile = TRUE; } else if (!strcmp(opt, "locale")) { if (missing_option_value(val, "locale")) goto err_exit; ntfs_set_char_encoding(val); #if defined(__APPLE__) || defined(__DARWIN__) #ifdef ENABLE_NFCONV } else if (!strcmp(opt, "nfconv")) { if (bogus_option_value(val, "nfconv")) goto err_exit; if (ntfs_macosx_normalize_filenames(1)) { ntfs_log_error("ntfs_macosx_normalize_filenames(1) failed!\n"); goto err_exit; } } else if (!strcmp(opt, "nonfconv")) { if (bogus_option_value(val, "nonfconv")) goto err_exit; if (ntfs_macosx_normalize_filenames(0)) { ntfs_log_error("ntfs_macosx_normalize_filenames(0) failed!\n"); goto err_exit; } #endif /* ENABLE_NFCONV */ #endif /* defined(__APPLE__) || defined(__DARWIN__) */ } else if (!strcmp(opt, "streams_interface")) { if (missing_option_value(val, "streams_interface")) goto err_exit; if (!strcmp(val, "none")) ctx->streams = NF_STREAMS_INTERFACE_NONE; else if (!strcmp(val, "xattr")) ctx->streams = NF_STREAMS_INTERFACE_XATTR; else if (!strcmp(val, "openxattr")) ctx->streams = NF_STREAMS_INTERFACE_OPENXATTR; else { ntfs_log_error("Invalid named data streams " "access interface.\n"); goto err_exit; } } else if (!strcmp(opt, "user_xattr")) { ctx->streams = NF_STREAMS_INTERFACE_XATTR; } else if (!strcmp(opt, "noauto")) { /* Don't pass noauto option to fuse. */ } else if (!strcmp(opt, "debug")) { if (bogus_option_value(val, "debug")) goto err_exit; ctx->debug = TRUE; ntfs_log_set_levels(NTFS_LOG_LEVEL_DEBUG); ntfs_log_set_levels(NTFS_LOG_LEVEL_TRACE); } else if (!strcmp(opt, "no_detach")) { if (bogus_option_value(val, "no_detach")) goto err_exit; ctx->no_detach = TRUE; } else if (!strcmp(opt, "remount")) { ntfs_log_error("Remounting is not supported at present." " You have to umount volume and then " "mount it once again.\n"); goto err_exit; } else if (!strcmp(opt, "blksize")) { ntfs_log_info("WARNING: blksize option is ignored " "because ntfs-3g must calculate it.\n"); } else if (!strcmp(opt, "inherit")) { /* * JPA do not overwrite inherited permissions * in create() */ ctx->inherit = TRUE; } else if (!strcmp(opt, "addsecurids")) { /* * JPA create security ids for files being read * with an individual security attribute */ ctx->secure_flags |= (1 << SECURITY_ADDSECURIDS); } else if (!strcmp(opt, "staticgrps")) { /* * JPA use static definition of groups * for file access control */ ctx->secure_flags |= (1 << SECURITY_STATICGRPS); } else if (!strcmp(opt, "usermapping")) { if (!val) { ntfs_log_error("'usermapping' option should have " "a value.\n"); goto err_exit; } ctx->usermap_path = strdup(val); if (!ctx->usermap_path) { ntfs_log_error("no more memory to store " "'usermapping' option.\n"); goto err_exit; } } else if (!strcmp(opt, "efs_raw")) { if (bogus_option_value(val, "efs_raw")) goto err_exit; ctx->efs_raw = TRUE; } else { /* Probably FUSE option. */ if (strappend(&ret, opt)) goto err_exit; if (val) { if (strappend(&ret, "=")) goto err_exit; if (strappend(&ret, val)) goto err_exit; } if (strappend(&ret, ",")) goto err_exit; } } if (!no_def_opts && strappend(&ret, def_opts)) goto err_exit; #if KERNELPERMS if (default_permissions && strappend(&ret, "default_permissions,")) goto err_exit; #endif if (ctx->atime == ATIME_RELATIVE && strappend(&ret, "relatime,")) goto err_exit; else if (ctx->atime == ATIME_ENABLED && strappend(&ret, "atime,")) goto err_exit; else if (ctx->atime == ATIME_DISABLED && strappend(&ret, "noatime,")) goto err_exit; if (strappend(&ret, "fsname=")) goto err_exit; if (strappend(&ret, opts.device)) goto err_exit; if (default_permissions) ctx->secure_flags |= (1 << SECURITY_DEFAULT); if (want_permissions) ctx->secure_flags |= (1 << SECURITY_WANTED); if (ctx->ro) ctx->secure_flags &= ~(1 << SECURITY_ADDSECURIDS); exit: free(options); return ret; err_exit: free(ret); ret = NULL; goto exit; } static void usage(void) { ntfs_log_info(usage_msg, EXEC_NAME, VERSION, FUSE_TYPE, fuse_version(), 5 + POSIXACLS*6 - KERNELPERMS*3 + CACHEING, EXEC_NAME, ntfs_home); } #ifndef HAVE_REALPATH /* If there is no realpath() on the system, provide a dummy one. */ static char *realpath(const char *path, char *resolved_path) { strncpy(resolved_path, path, PATH_MAX); resolved_path[PATH_MAX] = '\0'; return resolved_path; } #endif /** * parse_options - Read and validate the programs command line * Read the command line, verify the syntax and parse the options. * * Return: 0 success, -1 error. */ static int parse_options(int argc, char *argv[]) { int c; static const char *sopt = "-o:hvV"; static const struct option lopt[] = { { "options", required_argument, NULL, 'o' }, { "help", no_argument, NULL, 'h' }, { "verbose", no_argument, NULL, 'v' }, { "version", no_argument, NULL, 'V' }, { NULL, 0, NULL, 0 } }; opterr = 0; /* We'll handle the errors, thank you. */ while ((c = getopt_long(argc, argv, sopt, lopt, NULL)) != -1) { switch (c) { case 1: /* A non-option argument */ if (!opts.device) { opts.device = (char*)ntfs_malloc(PATH_MAX + 1); if (!opts.device) return -1; /* Canonicalize device name (mtab, etc) */ if (!realpath(optarg, opts.device)) { ntfs_log_perror("%s: Failed to access " "volume '%s'", EXEC_NAME, optarg); free(opts.device); opts.device = NULL; return -1; } } else if (!opts.mnt_point) { opts.mnt_point = optarg; } else { ntfs_log_error("%s: You must specify exactly one " "device and exactly one mount " "point.\n", EXEC_NAME); return -1; } break; case 'o': if (opts.options) if (strappend(&opts.options, ",")) return -1; if (strappend(&opts.options, optarg)) return -1; break; case 'h': usage(); exit(9); case 'v': /* * We must handle the 'verbose' option even if * we don't use it because mount(8) passes it. */ break; case 'V': ntfs_log_info("%s %s %s %d\n", EXEC_NAME, VERSION, FUSE_TYPE, fuse_version()); exit(0); default: ntfs_log_error("%s: Unknown option '%s'.\n", EXEC_NAME, argv[optind - 1]); return -1; } } if (!opts.device) { ntfs_log_error("%s: No device is specified.\n", EXEC_NAME); return -1; } if (!opts.mnt_point) { ntfs_log_error("%s: No mountpoint is specified.\n", EXEC_NAME); return -1; } return 0; } #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" " http://ntfs-3g.org/support.html#fuse26\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"; struct timespec req = { 0, 100000000 }; /* 100 msec */ fuse_fstype fstype; if (!stat(cmd, &st) && !geteuid()) { pid = fork(); if (!pid) { execl(cmd, cmd, "fuse", NULL); _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 (strappend(parsed_options, options)) return -1; return 0; } static struct fuse_session *mount_fuse(char *parsed_options) { struct fuse_session *se = 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->debug) if (fuse_opt_add_arg(&args, "-odebug") == -1) goto err; se = fuse_lowlevel_new(&args , &ntfs_3g_ops, sizeof(ntfs_3g_ops), NULL); if (!se) goto err; if (fuse_set_signal_handlers(se)) goto err_destroy; fuse_session_add_chan(se, ctx->fc); out: fuse_opt_free_args(&args); return se; err_destroy: fuse_session_destroy(se); se = 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()); 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_session *se; fuse_fstype fstype = FSTYPE_UNKNOWN; const char *permissions_mode = (const char*)NULL; const char *failed_secure = (const char*)NULL; struct stat sbuf; 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 (parse_options(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(opts.options); if (!parsed_options) { err = NTFS_VOLUME_SYNTAX_ERROR; 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 (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 (!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); goto err2; } #endif err = ntfs_open(opts.device); if (err) 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->security.vol = ctx->vol; ctx->vol->secure_flags = ctx->secure_flags; ctx->vol->efs_raw = ctx->efs_raw; /* JPA open $Secure, (whatever NTFS version !) */ /* to initialize security data */ if (ntfs_open_secure(ctx->vol) && (ctx->vol->major_ver >= 3)) failed_secure = "Could not open file $Secure"; if (!ntfs_build_mapping(&ctx->security,ctx->usermap_path)) { #if POSIXACLS 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 (strappend(&parsed_options, ",default_permissions,acl")) { err = NTFS_VOLUME_SYNTAX_ERROR; goto err_out; } #endif /* KERNELACLS */ } #else /* POSIXACLS */ if (!(ctx->vol->secure_flags & (1 << SECURITY_DEFAULT))) { /* * No explicit option but user mapping found * force default security */ #if KERNELPERMS ctx->vol->secure_flags |= (1 << SECURITY_DEFAULT); if (strappend(&parsed_options, ",default_permissions")) { err = NTFS_VOLUME_SYNTAX_ERROR; goto err_out; } #endif /* KERNELPERMS */ } permissions_mode = "User mapping built"; #endif /* POSIXACLS */ } 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->secure_flags & (1 << SECURITY_WANTED)) ctx->secure_flags |= (1 << SECURITY_DEFAULT); if (ctx->secure_flags & (1 << SECURITY_DEFAULT)) { ctx->secure_flags |= (1 << SECURITY_RAW); permissions_mode = "Global ownership and permissions enforced"; } else { ctx->secure_flags &= ~(1 << SECURITY_RAW); permissions_mode = "Ownership and permissions disabled"; } } if (ctx->usermap_path) free (ctx->usermap_path); se = mount_fuse(parsed_options); if (!se) { 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, 5 + POSIXACLS*6 - KERNELPERMS*3 + CACHEING); fuse_session_loop(se); fuse_remove_signal_handlers(se); err = 0; fuse_unmount(opts.mnt_point, ctx->fc); fuse_session_destroy(se); err_out: ntfs_mount_error(opts.device, opts.mnt_point, err); if (ctx->abs_mnt_point) free(ctx->abs_mnt_point); err2: ntfs_close(); free(ctx); free(parsed_options); free(opts.options); free(opts.device); return err; }