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Diffstat (limited to 'fs/ntfs/super.c')
-rw-r--r--fs/ntfs/super.c144
1 files changed, 79 insertions, 65 deletions
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index a30ecacc01f..6c3296e546c 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -1,7 +1,7 @@
/*
* super.c - NTFS kernel super block handling. Part of the Linux-NTFS project.
*
- * Copyright (c) 2001-2007 Anton Altaparmakov
+ * Copyright (c) 2001-2012 Anton Altaparmakov and Tuxera Inc.
* Copyright (c) 2001,2002 Richard Russon
*
* This program/include file is free software; you can redistribute it and/or
@@ -19,6 +19,7 @@
* distribution in the file COPYING); if not, write to the Free Software
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/stddef.h>
#include <linux/init.h>
@@ -49,8 +50,8 @@
static unsigned long ntfs_nr_compression_users;
/* A global default upcase table and a corresponding reference count. */
-static ntfschar *default_upcase = NULL;
-static unsigned long ntfs_nr_upcase_users = 0;
+static ntfschar *default_upcase;
+static unsigned long ntfs_nr_upcase_users;
/* Error constants/strings used in inode.c::ntfs_show_options(). */
typedef enum {
@@ -102,9 +103,9 @@ static bool parse_options(ntfs_volume *vol, char *opt)
char *p, *v, *ov;
static char *utf8 = "utf8";
int errors = 0, sloppy = 0;
- uid_t uid = (uid_t)-1;
- gid_t gid = (gid_t)-1;
- mode_t fmask = (mode_t)-1, dmask = (mode_t)-1;
+ kuid_t uid = INVALID_UID;
+ kgid_t gid = INVALID_GID;
+ umode_t fmask = (umode_t)-1, dmask = (umode_t)-1;
int mft_zone_multiplier = -1, on_errors = -1;
int show_sys_files = -1, case_sensitive = -1, disable_sparse = -1;
struct nls_table *nls_map = NULL, *old_nls;
@@ -128,6 +129,30 @@ static bool parse_options(ntfs_volume *vol, char *opt)
if (*v) \
goto needs_val; \
}
+#define NTFS_GETOPT_UID(option, variable) \
+ if (!strcmp(p, option)) { \
+ uid_t uid_value; \
+ if (!v || !*v) \
+ goto needs_arg; \
+ uid_value = simple_strtoul(ov = v, &v, 0); \
+ if (*v) \
+ goto needs_val; \
+ variable = make_kuid(current_user_ns(), uid_value); \
+ if (!uid_valid(variable)) \
+ goto needs_val; \
+ }
+#define NTFS_GETOPT_GID(option, variable) \
+ if (!strcmp(p, option)) { \
+ gid_t gid_value; \
+ if (!v || !*v) \
+ goto needs_arg; \
+ gid_value = simple_strtoul(ov = v, &v, 0); \
+ if (*v) \
+ goto needs_val; \
+ variable = make_kgid(current_user_ns(), gid_value); \
+ if (!gid_valid(variable)) \
+ goto needs_val; \
+ }
#define NTFS_GETOPT_OCTAL(option, variable) \
if (!strcmp(p, option)) { \
if (!v || !*v) \
@@ -165,8 +190,8 @@ static bool parse_options(ntfs_volume *vol, char *opt)
while ((p = strsep(&opt, ","))) {
if ((v = strchr(p, '=')))
*v++ = 0;
- NTFS_GETOPT("uid", uid)
- else NTFS_GETOPT("gid", gid)
+ NTFS_GETOPT_UID("uid", uid)
+ else NTFS_GETOPT_GID("gid", gid)
else NTFS_GETOPT_OCTAL("umask", fmask = dmask)
else NTFS_GETOPT_OCTAL("fmask", fmask)
else NTFS_GETOPT_OCTAL("dmask", dmask)
@@ -283,13 +308,13 @@ no_mount_options:
vol->on_errors = on_errors;
if (!vol->on_errors || vol->on_errors == ON_ERRORS_RECOVER)
vol->on_errors |= ON_ERRORS_CONTINUE;
- if (uid != (uid_t)-1)
+ if (uid_valid(uid))
vol->uid = uid;
- if (gid != (gid_t)-1)
+ if (gid_valid(gid))
vol->gid = gid;
- if (fmask != (mode_t)-1)
+ if (fmask != (umode_t)-1)
vol->fmask = fmask;
- if (dmask != (mode_t)-1)
+ if (dmask != (umode_t)-1)
vol->dmask = dmask;
if (show_sys_files != -1) {
if (show_sys_files)
@@ -444,6 +469,8 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
ntfs_debug("Entering with remount options string: %s", opt);
+ sync_filesystem(sb);
+
#ifndef NTFS_RW
/* For read-only compiled driver, enforce read-only flag. */
*flags |= MS_RDONLY;
@@ -458,7 +485,7 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
* the volume on boot and updates them.
*
* When remounting read-only, mark the volume clean if no volume errors
- * have occured.
+ * have occurred.
*/
if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
static const char *es = ". Cannot remount read-write.";
@@ -1023,7 +1050,8 @@ static bool load_and_init_mft_mirror(ntfs_volume *vol)
* ntfs_read_inode() will have set up the default ones.
*/
/* Set uid and gid to root. */
- tmp_ino->i_uid = tmp_ino->i_gid = 0;
+ tmp_ino->i_uid = GLOBAL_ROOT_UID;
+ tmp_ino->i_gid = GLOBAL_ROOT_GID;
/* Regular file. No access for anyone. */
tmp_ino->i_mode = S_IFREG;
/* No VFS initiated operations allowed for $MFTMirr. */
@@ -1239,7 +1267,6 @@ static int check_windows_hibernation_status(ntfs_volume *vol)
{
MFT_REF mref;
struct inode *vi;
- ntfs_inode *ni;
struct page *page;
u32 *kaddr, *kend;
ntfs_name *name = NULL;
@@ -1269,7 +1296,7 @@ static int check_windows_hibernation_status(ntfs_volume *vol)
"hibernated on the volume.");
return 0;
}
- /* A real error occured. */
+ /* A real error occurred. */
ntfs_error(vol->sb, "Failed to find inode number for "
"hiberfil.sys.");
return ret;
@@ -1290,7 +1317,6 @@ static int check_windows_hibernation_status(ntfs_volume *vol)
"is not the system volume.", i_size_read(vi));
goto iput_out;
}
- ni = NTFS_I(vi);
page = ntfs_map_page(vi->i_mapping, 0);
if (IS_ERR(page)) {
ntfs_error(vol->sb, "Failed to read from hiberfil.sys.");
@@ -1370,7 +1396,7 @@ static bool load_and_init_quota(ntfs_volume *vol)
NVolSetQuotaOutOfDate(vol);
return true;
}
- /* A real error occured. */
+ /* A real error occurred. */
ntfs_error(vol->sb, "Failed to find inode number for $Quota.");
return false;
}
@@ -1454,7 +1480,7 @@ not_enabled:
NVolSetUsnJrnlStamped(vol);
return true;
}
- /* A real error occured. */
+ /* A real error occurred. */
ntfs_error(vol->sb, "Failed to find inode number for "
"$UsnJrnl.");
return false;
@@ -1871,7 +1897,7 @@ get_ctx_vol_failed:
vol->minor_ver = vi->minor_ver;
ntfs_attr_put_search_ctx(ctx);
unmap_mft_record(NTFS_I(vol->vol_ino));
- printk(KERN_INFO "NTFS volume version %i.%i.\n", vol->major_ver,
+ pr_info("volume version %i.%i.\n", vol->major_ver,
vol->minor_ver);
if (vol->major_ver < 3 && NVolSparseEnabled(vol)) {
ntfs_warning(vol->sb, "Disabling sparse support due to NTFS "
@@ -2292,7 +2318,7 @@ static void ntfs_put_super(struct super_block *sb)
ntfs_commit_inode(vol->mft_ino);
/*
- * If a read-write mount and no volume errors have occured, mark the
+ * If a read-write mount and no volume errors have occurred, mark the
* volume clean. Also, re-commit all affected inodes.
*/
if (!(sb->s_flags & MS_RDONLY)) {
@@ -2475,7 +2501,7 @@ static s64 get_nr_free_clusters(ntfs_volume *vol)
nr_free -= PAGE_CACHE_SIZE * 8;
continue;
}
- kaddr = kmap_atomic(page, KM_USER0);
+ kaddr = kmap_atomic(page);
/*
* Subtract the number of set bits. If this
* is the last page and it is partial we don't really care as
@@ -2485,7 +2511,7 @@ static s64 get_nr_free_clusters(ntfs_volume *vol)
*/
nr_free -= bitmap_weight(kaddr,
PAGE_CACHE_SIZE * BITS_PER_BYTE);
- kunmap_atomic(kaddr, KM_USER0);
+ kunmap_atomic(kaddr);
page_cache_release(page);
}
ntfs_debug("Finished reading $Bitmap, last index = 0x%lx.", index - 1);
@@ -2496,7 +2522,7 @@ static s64 get_nr_free_clusters(ntfs_volume *vol)
if (vol->nr_clusters & 63)
nr_free += 64 - (vol->nr_clusters & 63);
up_read(&vol->lcnbmp_lock);
- /* If errors occured we may well have gone below zero, fix this. */
+ /* If errors occurred we may well have gone below zero, fix this. */
if (nr_free < 0)
nr_free = 0;
ntfs_debug("Exiting.");
@@ -2546,7 +2572,7 @@ static unsigned long __get_nr_free_mft_records(ntfs_volume *vol,
nr_free -= PAGE_CACHE_SIZE * 8;
continue;
}
- kaddr = kmap_atomic(page, KM_USER0);
+ kaddr = kmap_atomic(page);
/*
* Subtract the number of set bits. If this
* is the last page and it is partial we don't really care as
@@ -2556,12 +2582,12 @@ static unsigned long __get_nr_free_mft_records(ntfs_volume *vol,
*/
nr_free -= bitmap_weight(kaddr,
PAGE_CACHE_SIZE * BITS_PER_BYTE);
- kunmap_atomic(kaddr, KM_USER0);
+ kunmap_atomic(kaddr);
page_cache_release(page);
}
ntfs_debug("Finished reading $MFT/$BITMAP, last index = 0x%lx.",
index - 1);
- /* If errors occured we may well have gone below zero, fix this. */
+ /* If errors occurred we may well have gone below zero, fix this. */
if (nr_free < 0)
nr_free = 0;
ntfs_debug("Exiting.");
@@ -2662,31 +2688,14 @@ static const struct super_operations ntfs_sops = {
.alloc_inode = ntfs_alloc_big_inode, /* VFS: Allocate new inode. */
.destroy_inode = ntfs_destroy_big_inode, /* VFS: Deallocate inode. */
#ifdef NTFS_RW
- //.dirty_inode = NULL, /* VFS: Called from
- // __mark_inode_dirty(). */
.write_inode = ntfs_write_inode, /* VFS: Write dirty inode to
disk. */
- //.drop_inode = NULL, /* VFS: Called just after the
- // inode reference count has
- // been decreased to zero.
- // NOTE: The inode lock is
- // held. See fs/inode.c::
- // generic_drop_inode(). */
- //.delete_inode = NULL, /* VFS: Delete inode from disk.
- // Called when i_count becomes
- // 0 and i_nlink is also 0. */
- //.write_super = NULL, /* Flush dirty super block to
- // disk. */
- //.sync_fs = NULL, /* ? */
- //.write_super_lockfs = NULL, /* ? */
- //.unlockfs = NULL, /* ? */
#endif /* NTFS_RW */
.put_super = ntfs_put_super, /* Syscall: umount. */
.statfs = ntfs_statfs, /* Syscall: statfs */
.remount_fs = ntfs_remount, /* Syscall: mount -o remount. */
.evict_inode = ntfs_evict_big_inode, /* VFS: Called when an inode is
removed from memory. */
- //.umount_begin = NULL, /* Forced umount. */
.show_options = ntfs_show_options, /* Show mount options in
proc. */
};
@@ -2910,9 +2919,10 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Failed to load system files.");
goto unl_upcase_iput_tmp_ino_err_out_now;
}
- if ((sb->s_root = d_alloc_root(vol->root_ino))) {
- /* We grab a reference, simulating an ntfs_iget(). */
- ihold(vol->root_ino);
+
+ /* We grab a reference, simulating an ntfs_iget(). */
+ ihold(vol->root_ino);
+ if ((sb->s_root = d_make_root(vol->root_ino))) {
ntfs_debug("Exiting, status successful.");
/* Release the default upcase if it has no users. */
mutex_lock(&ntfs_lock);
@@ -3072,6 +3082,7 @@ static struct file_system_type ntfs_fs_type = {
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS_FS("ntfs");
/* Stable names for the slab caches. */
static const char ntfs_index_ctx_cache_name[] = "ntfs_index_ctx_cache";
@@ -3085,7 +3096,7 @@ static int __init init_ntfs_fs(void)
int err = 0;
/* This may be ugly but it results in pretty output so who cares. (-8 */
- printk(KERN_INFO "NTFS driver " NTFS_VERSION " [Flags: R/"
+ pr_info("driver " NTFS_VERSION " [Flags: R/"
#ifdef NTFS_RW
"W"
#else
@@ -3105,16 +3116,15 @@ static int __init init_ntfs_fs(void)
sizeof(ntfs_index_context), 0 /* offset */,
SLAB_HWCACHE_ALIGN, NULL /* ctor */);
if (!ntfs_index_ctx_cache) {
- printk(KERN_CRIT "NTFS: Failed to create %s!\n",
- ntfs_index_ctx_cache_name);
+ pr_crit("Failed to create %s!\n", ntfs_index_ctx_cache_name);
goto ictx_err_out;
}
ntfs_attr_ctx_cache = kmem_cache_create(ntfs_attr_ctx_cache_name,
sizeof(ntfs_attr_search_ctx), 0 /* offset */,
SLAB_HWCACHE_ALIGN, NULL /* ctor */);
if (!ntfs_attr_ctx_cache) {
- printk(KERN_CRIT "NTFS: Failed to create %s!\n",
- ntfs_attr_ctx_cache_name);
+ pr_crit("NTFS: Failed to create %s!\n",
+ ntfs_attr_ctx_cache_name);
goto actx_err_out;
}
@@ -3122,8 +3132,7 @@ static int __init init_ntfs_fs(void)
(NTFS_MAX_NAME_LEN+1) * sizeof(ntfschar), 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!ntfs_name_cache) {
- printk(KERN_CRIT "NTFS: Failed to create %s!\n",
- ntfs_name_cache_name);
+ pr_crit("Failed to create %s!\n", ntfs_name_cache_name);
goto name_err_out;
}
@@ -3131,8 +3140,7 @@ static int __init init_ntfs_fs(void)
sizeof(ntfs_inode), 0,
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
if (!ntfs_inode_cache) {
- printk(KERN_CRIT "NTFS: Failed to create %s!\n",
- ntfs_inode_cache_name);
+ pr_crit("Failed to create %s!\n", ntfs_inode_cache_name);
goto inode_err_out;
}
@@ -3141,15 +3149,14 @@ static int __init init_ntfs_fs(void)
SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
ntfs_big_inode_init_once);
if (!ntfs_big_inode_cache) {
- printk(KERN_CRIT "NTFS: Failed to create %s!\n",
- ntfs_big_inode_cache_name);
+ pr_crit("Failed to create %s!\n", ntfs_big_inode_cache_name);
goto big_inode_err_out;
}
/* Register the ntfs sysctls. */
err = ntfs_sysctl(1);
if (err) {
- printk(KERN_CRIT "NTFS: Failed to register NTFS sysctls!\n");
+ pr_crit("Failed to register NTFS sysctls!\n");
goto sysctl_err_out;
}
@@ -3158,8 +3165,10 @@ static int __init init_ntfs_fs(void)
ntfs_debug("NTFS driver registered successfully.");
return 0; /* Success! */
}
- printk(KERN_CRIT "NTFS: Failed to register NTFS filesystem driver!\n");
+ pr_crit("Failed to register NTFS filesystem driver!\n");
+ /* Unregister the ntfs sysctls. */
+ ntfs_sysctl(0);
sysctl_err_out:
kmem_cache_destroy(ntfs_big_inode_cache);
big_inode_err_out:
@@ -3172,8 +3181,7 @@ actx_err_out:
kmem_cache_destroy(ntfs_index_ctx_cache);
ictx_err_out:
if (!err) {
- printk(KERN_CRIT "NTFS: Aborting NTFS filesystem driver "
- "registration...\n");
+ pr_crit("Aborting NTFS filesystem driver registration...\n");
err = -ENOMEM;
}
return err;
@@ -3184,6 +3192,12 @@ static void __exit exit_ntfs_fs(void)
ntfs_debug("Unregistering NTFS driver.");
unregister_filesystem(&ntfs_fs_type);
+
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
kmem_cache_destroy(ntfs_big_inode_cache);
kmem_cache_destroy(ntfs_inode_cache);
kmem_cache_destroy(ntfs_name_cache);
@@ -3193,12 +3207,12 @@ static void __exit exit_ntfs_fs(void)
ntfs_sysctl(0);
}
-MODULE_AUTHOR("Anton Altaparmakov <aia21@cantab.net>");
-MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2007 Anton Altaparmakov");
+MODULE_AUTHOR("Anton Altaparmakov <anton@tuxera.com>");
+MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2011 Anton Altaparmakov and Tuxera Inc.");
MODULE_VERSION(NTFS_VERSION);
MODULE_LICENSE("GPL");
#ifdef DEBUG
-module_param(debug_msgs, bool, 0);
+module_param(debug_msgs, bint, 0);
MODULE_PARM_DESC(debug_msgs, "Enable debug messages.");
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:21:37 +0000