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-rw-r--r--fs/isofs/inode.c934
1 files changed, 529 insertions, 405 deletions
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 298f08be22d..4556ce1af5b 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -3,7 +3,7 @@
*
* (C) 1991 Linus Torvalds - minix filesystem
* 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem.
- * 1994 Eberhard Moenkeberg - multi session handling.
+ * 1994 Eberhard Mönkeberg - multi session handling.
* 1995 Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs.
* 1997 Gordon Chaffee - Joliet CDs
* 1998 Eric Lammerts - ISO 9660 Level 3
@@ -11,43 +11,49 @@
* 2004 Paul Serice - NFS Export Operations
*/
-#include <linux/config.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/nls.h>
#include <linux/ctype.h>
-#include <linux/smp_lock.h>
#include <linux/statfs.h>
#include <linux/cdrom.h>
#include <linux/parser.h>
+#include <linux/mpage.h>
+#include <linux/user_namespace.h>
#include "isofs.h"
#include "zisofs.h"
#define BEQUIET
-static int isofs_hashi(struct dentry *parent, struct qstr *qstr);
-static int isofs_hash(struct dentry *parent, struct qstr *qstr);
-static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b);
-static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b);
+static int isofs_hashi(const struct dentry *parent, struct qstr *qstr);
+static int isofs_hash(const struct dentry *parent, struct qstr *qstr);
+static int isofs_dentry_cmpi(const struct dentry *parent,
+ const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name);
+static int isofs_dentry_cmp(const struct dentry *parent,
+ const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name);
#ifdef CONFIG_JOLIET
-static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr);
-static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr);
-static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
-static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b);
+static int isofs_hashi_ms(const struct dentry *parent, struct qstr *qstr);
+static int isofs_hash_ms(const struct dentry *parent, struct qstr *qstr);
+static int isofs_dentry_cmpi_ms(const struct dentry *parent,
+ const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name);
+static int isofs_dentry_cmp_ms(const struct dentry *parent,
+ const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name);
#endif
static void isofs_put_super(struct super_block *sb)
{
struct isofs_sb_info *sbi = ISOFS_SB(sb);
+
#ifdef CONFIG_JOLIET
- if (sbi->s_nls_iocharset) {
- unload_nls(sbi->s_nls_iocharset);
- sbi->s_nls_iocharset = NULL;
- }
+ unload_nls(sbi->s_nls_iocharset);
#endif
kfree(sbi);
@@ -55,40 +61,45 @@ static void isofs_put_super(struct super_block *sb)
return;
}
-static void isofs_read_inode(struct inode *);
-static int isofs_statfs (struct super_block *, struct kstatfs *);
+static int isofs_read_inode(struct inode *);
+static int isofs_statfs (struct dentry *, struct kstatfs *);
-static kmem_cache_t *isofs_inode_cachep;
+static struct kmem_cache *isofs_inode_cachep;
static struct inode *isofs_alloc_inode(struct super_block *sb)
{
struct iso_inode_info *ei;
- ei = kmem_cache_alloc(isofs_inode_cachep, SLAB_KERNEL);
+ ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
return &ei->vfs_inode;
}
-static void isofs_destroy_inode(struct inode *inode)
+static void isofs_i_callback(struct rcu_head *head)
{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
}
-static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
+static void isofs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, isofs_i_callback);
+}
+
+static void init_once(void *foo)
{
struct iso_inode_info *ei = foo;
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR)
- inode_init_once(&ei->vfs_inode);
+ inode_init_once(&ei->vfs_inode);
}
-
-static int init_inodecache(void)
+
+static int __init init_inodecache(void)
{
isofs_inode_cachep = kmem_cache_create("isofs_inode_cache",
- sizeof(struct iso_inode_info),
- 0, SLAB_RECLAIM_ACCOUNT,
- init_once, NULL);
+ sizeof(struct iso_inode_info),
+ 0, (SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD),
+ init_once);
if (isofs_inode_cachep == NULL)
return -ENOMEM;
return 0;
@@ -96,29 +107,33 @@ static int init_inodecache(void)
static void destroy_inodecache(void)
{
- if (kmem_cache_destroy(isofs_inode_cachep))
- printk(KERN_INFO "iso_inode_cache: not all structures were "
- "freed\n");
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(isofs_inode_cachep);
}
static int isofs_remount(struct super_block *sb, int *flags, char *data)
{
- /* we probably want a lot more here */
- *flags |= MS_RDONLY;
+ sync_filesystem(sb);
+ if (!(*flags & MS_RDONLY))
+ return -EROFS;
return 0;
}
-static struct super_operations isofs_sops = {
+static const struct super_operations isofs_sops = {
.alloc_inode = isofs_alloc_inode,
.destroy_inode = isofs_destroy_inode,
- .read_inode = isofs_read_inode,
.put_super = isofs_put_super,
.statfs = isofs_statfs,
.remount_fs = isofs_remount,
+ .show_options = generic_show_options,
};
-static struct dentry_operations isofs_dentry_ops[] = {
+static const struct dentry_operations isofs_dentry_ops[] = {
{
.d_hash = isofs_hash,
.d_compare = isofs_dentry_cmp,
@@ -140,30 +155,34 @@ static struct dentry_operations isofs_dentry_ops[] = {
};
struct iso9660_options{
- char map;
- char rock;
- char joliet;
- char cruft;
- char hide;
- char showassoc;
- char nocompress;
+ unsigned int rock:1;
+ unsigned int joliet:1;
+ unsigned int cruft:1;
+ unsigned int hide:1;
+ unsigned int showassoc:1;
+ unsigned int nocompress:1;
+ unsigned int overriderockperm:1;
+ unsigned int uid_set:1;
+ unsigned int gid_set:1;
+ unsigned int utf8:1;
+ unsigned char map;
unsigned char check;
unsigned int blocksize;
- mode_t mode;
- gid_t gid;
- uid_t uid;
+ umode_t fmode;
+ umode_t dmode;
+ kgid_t gid;
+ kuid_t uid;
char *iocharset;
- unsigned char utf8;
- /* LVE */
- s32 session;
- s32 sbsector;
+ /* LVE */
+ s32 session;
+ s32 sbsector;
};
/*
* Compute the hash for the isofs name corresponding to the dentry.
*/
static int
-isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms)
+isofs_hash_common(struct qstr *qstr, int ms)
{
const char *name;
int len;
@@ -184,7 +203,7 @@ isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms)
* Compute the hash for the isofs name corresponding to the dentry.
*/
static int
-isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
+isofs_hashi_common(struct qstr *qstr, int ms)
{
const char *name;
int len;
@@ -201,7 +220,7 @@ isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
hash = init_name_hash();
while (len--) {
c = tolower(*name++);
- hash = partial_name_hash(tolower(c), hash);
+ hash = partial_name_hash(c, hash);
}
qstr->hash = end_name_hash(hash);
@@ -209,100 +228,86 @@ isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
}
/*
- * Case insensitive compare of two isofs names.
+ * Compare of two isofs names.
*/
-static int isofs_dentry_cmpi_common(struct dentry *dentry, struct qstr *a,
- struct qstr *b, int ms)
+static int isofs_dentry_cmp_common(
+ unsigned int len, const char *str,
+ const struct qstr *name, int ms, int ci)
{
int alen, blen;
/* A filename cannot end in '.' or we treat it like it has none */
- alen = a->len;
- blen = b->len;
+ alen = name->len;
+ blen = len;
if (ms) {
- while (alen && a->name[alen-1] == '.')
+ while (alen && name->name[alen-1] == '.')
alen--;
- while (blen && b->name[blen-1] == '.')
+ while (blen && str[blen-1] == '.')
blen--;
}
if (alen == blen) {
- if (strnicmp(a->name, b->name, alen) == 0)
- return 0;
- }
- return 1;
-}
-
-/*
- * Case sensitive compare of two isofs names.
- */
-static int isofs_dentry_cmp_common(struct dentry *dentry, struct qstr *a,
- struct qstr *b, int ms)
-{
- int alen, blen;
-
- /* A filename cannot end in '.' or we treat it like it has none */
- alen = a->len;
- blen = b->len;
- if (ms) {
- while (alen && a->name[alen-1] == '.')
- alen--;
- while (blen && b->name[blen-1] == '.')
- blen--;
- }
- if (alen == blen) {
- if (strncmp(a->name, b->name, alen) == 0)
- return 0;
+ if (ci) {
+ if (strnicmp(name->name, str, alen) == 0)
+ return 0;
+ } else {
+ if (strncmp(name->name, str, alen) == 0)
+ return 0;
+ }
}
return 1;
}
static int
-isofs_hash(struct dentry *dentry, struct qstr *qstr)
+isofs_hash(const struct dentry *dentry, struct qstr *qstr)
{
- return isofs_hash_common(dentry, qstr, 0);
+ return isofs_hash_common(qstr, 0);
}
static int
-isofs_hashi(struct dentry *dentry, struct qstr *qstr)
+isofs_hashi(const struct dentry *dentry, struct qstr *qstr)
{
- return isofs_hashi_common(dentry, qstr, 0);
+ return isofs_hashi_common(qstr, 0);
}
static int
-isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b)
+isofs_dentry_cmp(const struct dentry *parent, const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name)
{
- return isofs_dentry_cmp_common(dentry, a, b, 0);
+ return isofs_dentry_cmp_common(len, str, name, 0, 0);
}
static int
-isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b)
+isofs_dentry_cmpi(const struct dentry *parent, const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name)
{
- return isofs_dentry_cmpi_common(dentry, a, b, 0);
+ return isofs_dentry_cmp_common(len, str, name, 0, 1);
}
#ifdef CONFIG_JOLIET
static int
-isofs_hash_ms(struct dentry *dentry, struct qstr *qstr)
+isofs_hash_ms(const struct dentry *dentry, struct qstr *qstr)
{
- return isofs_hash_common(dentry, qstr, 1);
+ return isofs_hash_common(qstr, 1);
}
static int
-isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr)
+isofs_hashi_ms(const struct dentry *dentry, struct qstr *qstr)
{
- return isofs_hashi_common(dentry, qstr, 1);
+ return isofs_hashi_common(qstr, 1);
}
static int
-isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
+isofs_dentry_cmp_ms(const struct dentry *parent, const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name)
{
- return isofs_dentry_cmp_common(dentry, a, b, 1);
+ return isofs_dentry_cmp_common(len, str, name, 1, 0);
}
static int
-isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b)
+isofs_dentry_cmpi_ms(const struct dentry *parent, const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name)
{
- return isofs_dentry_cmpi_common(dentry, a, b, 1);
+ return isofs_dentry_cmp_common(len, str, name, 1, 1);
}
#endif
@@ -310,10 +315,10 @@ enum {
Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore,
Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet,
Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err,
- Opt_nocompress, Opt_hide, Opt_showassoc,
+ Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm,
};
-static match_table_t tokens = {
+static const match_table_t tokens = {
{Opt_norock, "norock"},
{Opt_nojoliet, "nojoliet"},
{Opt_unhide, "unhide"},
@@ -337,6 +342,8 @@ static match_table_t tokens = {
{Opt_uid, "uid=%u"},
{Opt_gid, "gid=%u"},
{Opt_mode, "mode=%u"},
+ {Opt_dmode, "dmode=%u"},
+ {Opt_overriderockperm, "overriderockperm"},
{Opt_block, "block=%u"},
{Opt_ignore, "conv=binary"},
{Opt_ignore, "conv=b"},
@@ -356,22 +363,22 @@ static int parse_options(char *options, struct iso9660_options *popt)
int option;
popt->map = 'n';
- popt->rock = 'y';
- popt->joliet = 'y';
- popt->cruft = 'n';
- popt->hide = 'n';
- popt->showassoc = 'n';
+ popt->rock = 1;
+ popt->joliet = 1;
+ popt->cruft = 0;
+ popt->hide = 0;
+ popt->showassoc = 0;
popt->check = 'u'; /* unset */
popt->nocompress = 0;
popt->blocksize = 1024;
- popt->mode = S_IRUGO | S_IXUGO; /* r-x for all. The disc could
- be shared with DOS machines so
- virtually anything could be
- a valid executable. */
- popt->gid = 0;
- popt->uid = 0;
+ popt->fmode = popt->dmode = ISOFS_INVALID_MODE;
+ popt->uid_set = 0;
+ popt->gid_set = 0;
+ popt->gid = GLOBAL_ROOT_GID;
+ popt->uid = GLOBAL_ROOT_UID;
popt->iocharset = NULL;
popt->utf8 = 0;
+ popt->overriderockperm = 0;
popt->session=-1;
popt->sbsector=-1;
if (!options)
@@ -388,20 +395,20 @@ static int parse_options(char *options, struct iso9660_options *popt)
token = match_token(p, tokens, args);
switch (token) {
case Opt_norock:
- popt->rock = 'n';
+ popt->rock = 0;
break;
case Opt_nojoliet:
- popt->joliet = 'n';
+ popt->joliet = 0;
break;
case Opt_hide:
- popt->hide = 'y';
+ popt->hide = 1;
break;
case Opt_unhide:
case Opt_showassoc:
- popt->showassoc = 'y';
+ popt->showassoc = 1;
break;
case Opt_cruft:
- popt->cruft = 'y';
+ popt->cruft = 1;
break;
case Opt_utf8:
popt->utf8 = 1;
@@ -444,17 +451,31 @@ static int parse_options(char *options, struct iso9660_options *popt)
case Opt_uid:
if (match_int(&args[0], &option))
return 0;
- popt->uid = option;
+ popt->uid = make_kuid(current_user_ns(), option);
+ if (!uid_valid(popt->uid))
+ return 0;
+ popt->uid_set = 1;
break;
case Opt_gid:
if (match_int(&args[0], &option))
return 0;
- popt->gid = option;
+ popt->gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(popt->gid))
+ return 0;
+ popt->gid_set = 1;
break;
case Opt_mode:
if (match_int(&args[0], &option))
return 0;
- popt->mode = option;
+ popt->fmode = option;
+ break;
+ case Opt_dmode:
+ if (match_int(&args[0], &option))
+ return 0;
+ popt->dmode = option;
+ break;
+ case Opt_overriderockperm:
+ popt->overriderockperm = 1;
break;
case Opt_block:
if (match_int(&args[0], &option))
@@ -507,34 +528,62 @@ static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
Te.cdte_format=CDROM_LBA;
i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te);
if (!i) {
- printk(KERN_DEBUG "Session %d start %d type %d\n",
- session, Te.cdte_addr.lba,
- Te.cdte_ctrl&CDROM_DATA_TRACK);
+ printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n",
+ session, Te.cdte_addr.lba,
+ Te.cdte_ctrl&CDROM_DATA_TRACK);
if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4)
return Te.cdte_addr.lba;
}
-
- printk(KERN_ERR "Invalid session number or type of track\n");
+
+ printk(KERN_ERR "ISOFS: Invalid session number or type of track\n");
}
i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info);
if (session > 0)
- printk(KERN_ERR "Invalid session number\n");
+ printk(KERN_ERR "ISOFS: Invalid session number\n");
#if 0
- printk("isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
+ printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
if (i==0) {
- printk("isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
- printk("isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
+ printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
+ printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
}
#endif
if (i==0)
#if WE_OBEY_THE_WRITTEN_STANDARDS
- if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
+ if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
#endif
- vol_desc_start=ms_info.addr.lba;
+ vol_desc_start=ms_info.addr.lba;
return vol_desc_start;
}
/*
+ * Check if root directory is empty (has less than 3 files).
+ *
+ * Used to detect broken CDs where ISO root directory is empty but Joliet root
+ * directory is OK. If such CD has Rock Ridge extensions, they will be disabled
+ * (and Joliet used instead) or else no files would be visible.
+ */
+static bool rootdir_empty(struct super_block *sb, unsigned long block)
+{
+ int offset = 0, files = 0, de_len;
+ struct iso_directory_record *de;
+ struct buffer_head *bh;
+
+ bh = sb_bread(sb, block);
+ if (!bh)
+ return true;
+ while (files < 3) {
+ de = (struct iso_directory_record *) (bh->b_data + offset);
+ de_len = *(unsigned char *) de;
+ if (de_len == 0)
+ break;
+ files++;
+ offset += de_len;
+ }
+ brelse(bh);
+ return files < 3;
+}
+
+/*
* Initialize the superblock and read the root inode.
*
* Note: a check_disk_change() has been done immediately prior
@@ -542,26 +591,27 @@ static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
*/
static int isofs_fill_super(struct super_block *s, void *data, int silent)
{
- struct buffer_head * bh = NULL, *pri_bh = NULL;
- struct hs_primary_descriptor * h_pri = NULL;
- struct iso_primary_descriptor * pri = NULL;
+ struct buffer_head *bh = NULL, *pri_bh = NULL;
+ struct hs_primary_descriptor *h_pri = NULL;
+ struct iso_primary_descriptor *pri = NULL;
struct iso_supplementary_descriptor *sec = NULL;
- struct iso_directory_record * rootp;
- int joliet_level = 0;
- int iso_blknum, block;
- int orig_zonesize;
- int table;
- unsigned int vol_desc_start;
- unsigned long first_data_zone;
- struct inode * inode;
- struct iso9660_options opt;
- struct isofs_sb_info * sbi;
-
- sbi = kmalloc(sizeof(*sbi), GFP_KERNEL);
+ struct iso_directory_record *rootp;
+ struct inode *inode;
+ struct iso9660_options opt;
+ struct isofs_sb_info *sbi;
+ unsigned long first_data_zone;
+ int joliet_level = 0;
+ int iso_blknum, block;
+ int orig_zonesize;
+ int table, error = -EINVAL;
+ unsigned int vol_desc_start;
+
+ save_mount_options(s, data);
+
+ sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
s->s_fs_info = sbi;
- memset(sbi, 0, sizeof(*sbi));
if (!parse_options((char *)data, &opt))
goto out_freesbi;
@@ -582,72 +632,73 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
vol_desc_start = (opt.sbsector != -1) ?
opt.sbsector : isofs_get_last_session(s,opt.session);
- for (iso_blknum = vol_desc_start+16;
- iso_blknum < vol_desc_start+100; iso_blknum++)
- {
- struct hs_volume_descriptor * hdp;
- struct iso_volume_descriptor * vdp;
-
- block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
- if (!(bh = sb_bread(s, block)))
- goto out_no_read;
-
- vdp = (struct iso_volume_descriptor *)bh->b_data;
- hdp = (struct hs_volume_descriptor *)bh->b_data;
-
- /* Due to the overlapping physical location of the descriptors,
- * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
- * proper identification in this case, we first check for ISO.
- */
- if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
- if (isonum_711 (vdp->type) == ISO_VD_END)
- break;
- if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) {
- if (pri == NULL) {
- pri = (struct iso_primary_descriptor *)vdp;
- /* Save the buffer in case we need it ... */
- pri_bh = bh;
- bh = NULL;
- }
- }
+ for (iso_blknum = vol_desc_start+16;
+ iso_blknum < vol_desc_start+100; iso_blknum++) {
+ struct hs_volume_descriptor *hdp;
+ struct iso_volume_descriptor *vdp;
+
+ block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
+ if (!(bh = sb_bread(s, block)))
+ goto out_no_read;
+
+ vdp = (struct iso_volume_descriptor *)bh->b_data;
+ hdp = (struct hs_volume_descriptor *)bh->b_data;
+
+ /*
+ * Due to the overlapping physical location of the descriptors,
+ * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
+ * proper identification in this case, we first check for ISO.
+ */
+ if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
+ if (isonum_711(vdp->type) == ISO_VD_END)
+ break;
+ if (isonum_711(vdp->type) == ISO_VD_PRIMARY) {
+ if (pri == NULL) {
+ pri = (struct iso_primary_descriptor *)vdp;
+ /* Save the buffer in case we need it ... */
+ pri_bh = bh;
+ bh = NULL;
+ }
+ }
#ifdef CONFIG_JOLIET
- else if (isonum_711 (vdp->type) == ISO_VD_SUPPLEMENTARY) {
- sec = (struct iso_supplementary_descriptor *)vdp;
- if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
- if (opt.joliet == 'y') {
- if (sec->escape[2] == 0x40) {
- joliet_level = 1;
- } else if (sec->escape[2] == 0x43) {
- joliet_level = 2;
- } else if (sec->escape[2] == 0x45) {
- joliet_level = 3;
- }
- printk(KERN_DEBUG"ISO 9660 Extensions: Microsoft Joliet Level %d\n",
- joliet_level);
+ else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) {
+ sec = (struct iso_supplementary_descriptor *)vdp;
+ if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
+ if (opt.joliet) {
+ if (sec->escape[2] == 0x40)
+ joliet_level = 1;
+ else if (sec->escape[2] == 0x43)
+ joliet_level = 2;
+ else if (sec->escape[2] == 0x45)
+ joliet_level = 3;
+
+ printk(KERN_DEBUG "ISO 9660 Extensions: "
+ "Microsoft Joliet Level %d\n",
+ joliet_level);
+ }
+ goto root_found;
+ } else {
+ /* Unknown supplementary volume descriptor */
+ sec = NULL;
+ }
}
- goto root_found;
- } else {
- /* Unknown supplementary volume descriptor */
- sec = NULL;
- }
- }
#endif
- } else {
- if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
- if (isonum_711 (hdp->type) != ISO_VD_PRIMARY)
- goto out_freebh;
-
- sbi->s_high_sierra = 1;
- opt.rock = 'n';
- h_pri = (struct hs_primary_descriptor *)vdp;
- goto root_found;
+ } else {
+ if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
+ if (isonum_711(hdp->type) != ISO_VD_PRIMARY)
+ goto out_freebh;
+
+ sbi->s_high_sierra = 1;
+ opt.rock = 0;
+ h_pri = (struct hs_primary_descriptor *)vdp;
+ goto root_found;
+ }
}
- }
- /* Just skip any volume descriptors we don't recognize */
+ /* Just skip any volume descriptors we don't recognize */
- brelse(bh);
- bh = NULL;
+ brelse(bh);
+ bh = NULL;
}
/*
* If we fall through, either no volume descriptor was found,
@@ -661,25 +712,25 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
root_found:
- if (joliet_level && (pri == NULL || opt.rock == 'n')) {
- /* This is the case of Joliet with the norock mount flag.
- * A disc with both Joliet and Rock Ridge is handled later
- */
- pri = (struct iso_primary_descriptor *) sec;
+ if (joliet_level && (pri == NULL || !opt.rock)) {
+ /* This is the case of Joliet with the norock mount flag.
+ * A disc with both Joliet and Rock Ridge is handled later
+ */
+ pri = (struct iso_primary_descriptor *) sec;
}
if(sbi->s_high_sierra){
- rootp = (struct iso_directory_record *) h_pri->root_directory_record;
- sbi->s_nzones = isonum_733 (h_pri->volume_space_size);
- sbi->s_log_zone_size = isonum_723 (h_pri->logical_block_size);
- sbi->s_max_size = isonum_733(h_pri->volume_space_size);
+ rootp = (struct iso_directory_record *) h_pri->root_directory_record;
+ sbi->s_nzones = isonum_733(h_pri->volume_space_size);
+ sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size);
+ sbi->s_max_size = isonum_733(h_pri->volume_space_size);
} else {
- if (!pri)
- goto out_freebh;
- rootp = (struct iso_directory_record *) pri->root_directory_record;
- sbi->s_nzones = isonum_733 (pri->volume_space_size);
- sbi->s_log_zone_size = isonum_723 (pri->logical_block_size);
- sbi->s_max_size = isonum_733(pri->volume_space_size);
+ if (!pri)
+ goto out_freebh;
+ rootp = (struct iso_directory_record *) pri->root_directory_record;
+ sbi->s_nzones = isonum_733(pri->volume_space_size);
+ sbi->s_log_zone_size = isonum_723(pri->logical_block_size);
+ sbi->s_max_size = isonum_733(pri->volume_space_size);
}
sbi->s_ninodes = 0; /* No way to figure this out easily */
@@ -692,42 +743,39 @@ root_found:
* blocks that were 512 bytes (which should only very rarely
* happen.)
*/
- if(orig_zonesize < opt.blocksize)
+ if (orig_zonesize < opt.blocksize)
goto out_bad_size;
/* RDE: convert log zone size to bit shift */
- switch (sbi->s_log_zone_size)
- { case 512: sbi->s_log_zone_size = 9; break;
- case 1024: sbi->s_log_zone_size = 10; break;
- case 2048: sbi->s_log_zone_size = 11; break;
+ switch (sbi->s_log_zone_size) {
+ case 512: sbi->s_log_zone_size = 9; break;
+ case 1024: sbi->s_log_zone_size = 10; break;
+ case 2048: sbi->s_log_zone_size = 11; break;
- default:
+ default:
goto out_bad_zone_size;
- }
+ }
s->s_magic = ISOFS_SUPER_MAGIC;
- s->s_maxbytes = 0xffffffff; /* We can handle files up to 4 GB */
- /* The CDROM is read-only, has no nodes (devices) on it, and since
- all of the files appear to be owned by root, we really do not want
- to allow suid. (suid or devices will not show up unless we have
- Rock Ridge extensions) */
-
- s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */;
+ /*
+ * With multi-extent files, file size is only limited by the maximum
+ * size of a file system, which is 8 TB.
+ */
+ s->s_maxbytes = 0x80000000000LL;
/* Set this for reference. Its not currently used except on write
which we don't have .. */
-
- first_data_zone = isonum_733 (rootp->extent) +
- isonum_711 (rootp->ext_attr_length);
+
+ first_data_zone = isonum_733(rootp->extent) +
+ isonum_711(rootp->ext_attr_length);
sbi->s_firstdatazone = first_data_zone;
#ifndef BEQUIET
- printk(KERN_DEBUG "Max size:%ld Log zone size:%ld\n",
- sbi->s_max_size,
- 1UL << sbi->s_log_zone_size);
- printk(KERN_DEBUG "First datazone:%ld\n", sbi->s_firstdatazone);
+ printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n",
+ sbi->s_max_size, 1UL << sbi->s_log_zone_size);
+ printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone);
if(sbi->s_high_sierra)
- printk(KERN_DEBUG "Disc in High Sierra format.\n");
+ printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n");
#endif
/*
@@ -742,8 +790,8 @@ root_found:
pri = (struct iso_primary_descriptor *) sec;
rootp = (struct iso_directory_record *)
pri->root_directory_record;
- first_data_zone = isonum_733 (rootp->extent) +
- isonum_711 (rootp->ext_attr_length);
+ first_data_zone = isonum_733(rootp->extent) +
+ isonum_711(rootp->ext_attr_length);
}
/*
@@ -776,7 +824,7 @@ root_found:
#ifdef CONFIG_JOLIET
if (joliet_level && opt.utf8 == 0) {
- char * p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
+ char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
sbi->s_nls_iocharset = load_nls(p);
if (! sbi->s_nls_iocharset) {
/* Fail only if explicit charset specified */
@@ -789,21 +837,31 @@ root_found:
s->s_op = &isofs_sops;
s->s_export_op = &isofs_export_ops;
sbi->s_mapping = opt.map;
- sbi->s_rock = (opt.rock == 'y' ? 2 : 0);
+ sbi->s_rock = (opt.rock ? 2 : 0);
sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/
sbi->s_cruft = opt.cruft;
sbi->s_hide = opt.hide;
sbi->s_showassoc = opt.showassoc;
sbi->s_uid = opt.uid;
sbi->s_gid = opt.gid;
+ sbi->s_uid_set = opt.uid_set;
+ sbi->s_gid_set = opt.gid_set;
sbi->s_utf8 = opt.utf8;
sbi->s_nocompress = opt.nocompress;
+ sbi->s_overriderockperm = opt.overriderockperm;
/*
* It would be incredibly stupid to allow people to mark every file
* on the disk as suid, so we merely allow them to set the default
* permissions.
*/
- sbi->s_mode = opt.mode & 0777;
+ if (opt.fmode != ISOFS_INVALID_MODE)
+ sbi->s_fmode = opt.fmode & 0777;
+ else
+ sbi->s_fmode = ISOFS_INVALID_MODE;
+ if (opt.dmode != ISOFS_INVALID_MODE)
+ sbi->s_dmode = opt.dmode & 0777;
+ else
+ sbi->s_dmode = ISOFS_INVALID_MODE;
/*
* Read the root inode, which _may_ result in changing
@@ -811,6 +869,20 @@ root_found:
* we then decide whether to use the Joliet descriptor.
*/
inode = isofs_iget(s, sbi->s_firstdatazone, 0);
+ if (IS_ERR(inode))
+ goto out_no_root;
+
+ /*
+ * Fix for broken CDs with Rock Ridge and empty ISO root directory but
+ * correct Joliet root directory.
+ */
+ if (sbi->s_rock == 1 && joliet_level &&
+ rootdir_empty(s, sbi->s_firstdatazone)) {
+ printk(KERN_NOTICE
+ "ISOFS: primary root directory is empty. "
+ "Disabling Rock Ridge and switching to Joliet.");
+ sbi->s_rock = 0;
+ }
/*
* If this disk has both Rock Ridge and Joliet on it, then we
@@ -826,34 +898,46 @@ root_found:
sbi->s_rock = 0;
if (sbi->s_firstdatazone != first_data_zone) {
sbi->s_firstdatazone = first_data_zone;
- printk(KERN_DEBUG
+ printk(KERN_DEBUG
"ISOFS: changing to secondary root\n");
iput(inode);
inode = isofs_iget(s, sbi->s_firstdatazone, 0);
+ if (IS_ERR(inode))
+ goto out_no_root;
}
}
if (opt.check == 'u') {
/* Only Joliet is case insensitive by default */
- if (joliet_level) opt.check = 'r';
- else opt.check = 's';
+ if (joliet_level)
+ opt.check = 'r';
+ else
+ opt.check = 's';
}
sbi->s_joliet_level = joliet_level;
- /* check the root inode */
- if (!inode)
- goto out_no_root;
- if (!inode->i_op)
- goto out_bad_root;
- /* get the root dentry */
- s->s_root = d_alloc_root(inode);
- if (!(s->s_root))
- goto out_no_root;
+ /* Make sure the root inode is a directory */
+ if (!S_ISDIR(inode->i_mode)) {
+ printk(KERN_WARNING
+ "isofs_fill_super: root inode is not a directory. "
+ "Corrupted media?\n");
+ goto out_iput;
+ }
table = 0;
- if (joliet_level) table += 2;
- if (opt.check == 'r') table++;
- s->s_root->d_op = &isofs_dentry_ops[table];
+ if (joliet_level)
+ table += 2;
+ if (opt.check == 'r')
+ table++;
+
+ s->s_d_op = &isofs_dentry_ops[table];
+
+ /* get the root dentry */
+ s->s_root = d_make_root(inode);
+ if (!(s->s_root)) {
+ error = -ENOMEM;
+ goto out_no_inode;
+ }
kfree(opt.iocharset);
@@ -862,54 +946,59 @@ root_found:
/*
* Display error messages and free resources.
*/
-out_bad_root:
- printk(KERN_WARNING "isofs_fill_super: root inode not initialized\n");
- goto out_iput;
-out_no_root:
- printk(KERN_WARNING "isofs_fill_super: get root inode failed\n");
out_iput:
iput(inode);
+ goto out_no_inode;
+out_no_root:
+ error = PTR_ERR(inode);
+ if (error != -ENOMEM)
+ printk(KERN_WARNING "%s: get root inode failed\n", __func__);
+out_no_inode:
#ifdef CONFIG_JOLIET
- if (sbi->s_nls_iocharset)
- unload_nls(sbi->s_nls_iocharset);
+ unload_nls(sbi->s_nls_iocharset);
#endif
goto out_freesbi;
out_no_read:
- printk(KERN_WARNING "isofs_fill_super: "
- "bread failed, dev=%s, iso_blknum=%d, block=%d\n",
- s->s_id, iso_blknum, block);
- goto out_freesbi;
+ printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n",
+ __func__, s->s_id, iso_blknum, block);
+ goto out_freebh;
out_bad_zone_size:
- printk(KERN_WARNING "Bad logical zone size %ld\n",
+ printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n",
sbi->s_log_zone_size);
goto out_freebh;
out_bad_size:
- printk(KERN_WARNING "Logical zone size(%d) < hardware blocksize(%u)\n",
+ printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n",
orig_zonesize, opt.blocksize);
goto out_freebh;
out_unknown_format:
if (!silent)
- printk(KERN_WARNING "Unable to identify CD-ROM format.\n");
+ printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n");
out_freebh:
brelse(bh);
+ brelse(pri_bh);
out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
- return -EINVAL;
+ return error;
}
-static int isofs_statfs (struct super_block *sb, struct kstatfs *buf)
+static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
{
+ struct super_block *sb = dentry->d_sb;
+ u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+
buf->f_type = ISOFS_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = (ISOFS_SB(sb)->s_nzones
- << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
+ << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
buf->f_bfree = 0;
buf->f_bavail = 0;
buf->f_files = ISOFS_SB(sb)->s_ninodes;
buf->f_ffree = 0;
+ buf->f_fsid.val[0] = (u32)id;
+ buf->f_fsid.val[1] = (u32)(id >> 32);
buf->f_namelen = NAME_MAX;
return 0;
}
@@ -917,37 +1006,34 @@ static int isofs_statfs (struct super_block *sb, struct kstatfs *buf)
/*
* Get a set of blocks; filling in buffer_heads if already allocated
* or getblk() if they are not. Returns the number of blocks inserted
- * (0 == error.)
+ * (-ve == error.)
*/
-int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
+int isofs_get_blocks(struct inode *inode, sector_t iblock,
struct buffer_head **bh, unsigned long nblocks)
{
- unsigned long b_off;
+ unsigned long b_off = iblock;
unsigned offset, sect_size;
unsigned int firstext;
unsigned long nextblk, nextoff;
- long iblock = (long)iblock_s;
- int section, rv;
+ int section, rv, error;
struct iso_inode_info *ei = ISOFS_I(inode);
- lock_kernel();
-
+ error = -EIO;
rv = 0;
- if (iblock < 0 || iblock != iblock_s) {
- printk("isofs_get_blocks: block number too large\n");
+ if (iblock != b_off) {
+ printk(KERN_DEBUG "%s: block number too large\n", __func__);
goto abort;
}
- b_off = iblock;
-
- offset = 0;
- firstext = ei->i_first_extent;
+
+ offset = 0;
+ firstext = ei->i_first_extent;
sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode);
- nextblk = ei->i_next_section_block;
- nextoff = ei->i_next_section_offset;
- section = 0;
+ nextblk = ei->i_next_section_block;
+ nextoff = ei->i_next_section_offset;
+ section = 0;
- while ( nblocks ) {
+ while (nblocks) {
/* If we are *way* beyond the end of the file, print a message.
* Access beyond the end of the file up to the next page boundary
* is normal, however because of the way the page cache works.
@@ -956,43 +1042,47 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
* I/O errors.
*/
if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
- printk("isofs_get_blocks: block >= EOF (%ld, %ld)\n",
- iblock, (unsigned long) inode->i_size);
+ printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n",
+ __func__, b_off,
+ (unsigned long long)inode->i_size);
goto abort;
}
-
- if (nextblk) {
- while (b_off >= (offset + sect_size)) {
- struct inode *ninode;
-
- offset += sect_size;
- if (nextblk == 0)
- goto abort;
- ninode = isofs_iget(inode->i_sb, nextblk, nextoff);
- if (!ninode)
- goto abort;
- firstext = ISOFS_I(ninode)->i_first_extent;
- sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode);
- nextblk = ISOFS_I(ninode)->i_next_section_block;
- nextoff = ISOFS_I(ninode)->i_next_section_offset;
- iput(ninode);
-
- if (++section > 100) {
- printk("isofs_get_blocks: More than 100 file sections ?!?, aborting...\n");
- printk("isofs_get_blocks: block=%ld firstext=%u sect_size=%u "
- "nextblk=%lu nextoff=%lu\n",
- iblock, firstext, (unsigned) sect_size,
- nextblk, nextoff);
- goto abort;
- }
+
+ /* On the last section, nextblk == 0, section size is likely to
+ * exceed sect_size by a partial block, and access beyond the
+ * end of the file will reach beyond the section size, too.
+ */
+ while (nextblk && (b_off >= (offset + sect_size))) {
+ struct inode *ninode;
+
+ offset += sect_size;
+ ninode = isofs_iget(inode->i_sb, nextblk, nextoff);
+ if (IS_ERR(ninode)) {
+ error = PTR_ERR(ninode);
+ goto abort;
+ }
+ firstext = ISOFS_I(ninode)->i_first_extent;
+ sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode);
+ nextblk = ISOFS_I(ninode)->i_next_section_block;
+ nextoff = ISOFS_I(ninode)->i_next_section_offset;
+ iput(ninode);
+
+ if (++section > 100) {
+ printk(KERN_DEBUG "%s: More than 100 file sections ?!?"
+ " aborting...\n", __func__);
+ printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u "
+ "nextblk=%lu nextoff=%lu\n", __func__,
+ b_off, firstext, (unsigned) sect_size,
+ nextblk, nextoff);
+ goto abort;
}
}
-
- if ( *bh ) {
+
+ if (*bh) {
map_bh(*bh, inode->i_sb, firstext + b_off - offset);
} else {
*bh = sb_getblk(inode->i_sb, firstext+b_off-offset);
- if ( !*bh )
+ if (!*bh)
goto abort;
}
bh++; /* Next buffer head */
@@ -1001,9 +1091,9 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
rv++;
}
+ error = 0;
abort:
- unlock_kernel();
- return rv;
+ return rv != 0 ? rv : error;
}
/*
@@ -1012,12 +1102,15 @@ abort:
static int isofs_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
{
+ int ret;
+
if (create) {
- printk("isofs_get_block: Kernel tries to allocate a block\n");
+ printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__);
return -EROFS;
}
- return isofs_get_blocks(inode, iblock, &bh_result, 1) ? 0 : -EIO;
+ ret = isofs_get_blocks(inode, iblock, &bh_result, 1);
+ return ret < 0 ? ret : 0;
}
static int isofs_bmap(struct inode *inode, sector_t block)
@@ -1043,7 +1136,13 @@ struct buffer_head *isofs_bread(struct inode *inode, sector_t block)
static int isofs_readpage(struct file *file, struct page *page)
{
- return block_read_full_page(page,isofs_get_block);
+ return mpage_readpage(page, isofs_get_block);
+}
+
+static int isofs_readpages(struct file *file, struct address_space *mapping,
+ struct list_head *pages, unsigned nr_pages)
+{
+ return mpage_readpages(mapping, pages, nr_pages, isofs_get_block);
}
static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
@@ -1051,33 +1150,21 @@ static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
return generic_block_bmap(mapping,block,isofs_get_block);
}
-static struct address_space_operations isofs_aops = {
+static const struct address_space_operations isofs_aops = {
.readpage = isofs_readpage,
- .sync_page = block_sync_page,
+ .readpages = isofs_readpages,
.bmap = _isofs_bmap
};
-static inline void test_and_set_uid(uid_t *p, uid_t value)
-{
- if (value)
- *p = value;
-}
-
-static inline void test_and_set_gid(gid_t *p, gid_t value)
-{
- if (value)
- *p = value;
-}
-
static int isofs_read_level3_size(struct inode *inode)
{
unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra;
- struct buffer_head * bh = NULL;
+ struct buffer_head *bh = NULL;
unsigned long block, offset, block_saved, offset_saved;
int i = 0;
int more_entries = 0;
- struct iso_directory_record * tmpde = NULL;
+ struct iso_directory_record *tmpde = NULL;
struct iso_inode_info *ei = ISOFS_I(inode);
inode->i_size = 0;
@@ -1092,7 +1179,7 @@ static int isofs_read_level3_size(struct inode *inode)
offset = ei->i_iget5_offset;
do {
- struct iso_directory_record * de;
+ struct iso_directory_record *de;
unsigned int de_len;
if (!bh) {
@@ -1166,26 +1253,26 @@ out_noread:
return -EIO;
out_toomany:
- printk(KERN_INFO "isofs_read_level3_size: "
- "More than 100 file sections ?!?, aborting...\n"
- "isofs_read_level3_size: inode=%lu\n",
- inode->i_ino);
+ printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n"
+ "isofs_read_level3_size: inode=%lu\n",
+ __func__, inode->i_ino);
goto out;
}
-static void isofs_read_inode(struct inode *inode)
+static int isofs_read_inode(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
struct isofs_sb_info *sbi = ISOFS_SB(sb);
unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
unsigned long block;
int high_sierra = sbi->s_high_sierra;
- struct buffer_head * bh = NULL;
- struct iso_directory_record * de;
- struct iso_directory_record * tmpde = NULL;
+ struct buffer_head *bh = NULL;
+ struct iso_directory_record *de;
+ struct iso_directory_record *tmpde = NULL;
unsigned int de_len;
unsigned long offset;
struct iso_inode_info *ei = ISOFS_I(inode);
+ int ret = -EIO;
block = ei->i_iget5_block;
bh = sb_bread(inode->i_sb, block);
@@ -1202,7 +1289,8 @@ static void isofs_read_inode(struct inode *inode)
tmpde = kmalloc(de_len, GFP_KERNEL);
if (tmpde == NULL) {
- printk(KERN_INFO "isofs_read_inode: out of memory\n");
+ printk(KERN_INFO "%s: out of memory\n", __func__);
+ ret = -ENOMEM;
goto fail;
}
memcpy(tmpde, bh->b_data + offset, frag1);
@@ -1215,40 +1303,55 @@ static void isofs_read_inode(struct inode *inode)
}
inode->i_ino = isofs_get_ino(ei->i_iget5_block,
- ei->i_iget5_offset,
- ISOFS_BUFFER_BITS(inode));
+ ei->i_iget5_offset,
+ ISOFS_BUFFER_BITS(inode));
/* Assume it is a normal-format file unless told otherwise */
ei->i_file_format = isofs_file_normal;
if (de->flags[-high_sierra] & 2) {
- inode->i_mode = S_IRUGO | S_IXUGO | S_IFDIR;
- inode->i_nlink = 1; /* Set to 1. We know there are 2, but
- the find utility tries to optimize
- if it is 2, and it screws up. It is
- easier to give 1 which tells find to
- do it the hard way. */
+ if (sbi->s_dmode != ISOFS_INVALID_MODE)
+ inode->i_mode = S_IFDIR | sbi->s_dmode;
+ else
+ inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
+ set_nlink(inode, 1); /*
+ * Set to 1. We know there are 2, but
+ * the find utility tries to optimize
+ * if it is 2, and it screws up. It is
+ * easier to give 1 which tells find to
+ * do it the hard way.
+ */
} else {
- /* Everybody gets to read the file. */
- inode->i_mode = sbi->s_mode;
- inode->i_nlink = 1;
- inode->i_mode |= S_IFREG;
+ if (sbi->s_fmode != ISOFS_INVALID_MODE) {
+ inode->i_mode = S_IFREG | sbi->s_fmode;
+ } else {
+ /*
+ * Set default permissions: r-x for all. The disc
+ * could be shared with DOS machines so virtually
+ * anything could be a valid executable.
+ */
+ inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO;
+ }
+ set_nlink(inode, 1);
}
inode->i_uid = sbi->s_uid;
inode->i_gid = sbi->s_gid;
- inode->i_blocks = inode->i_blksize = 0;
+ inode->i_blocks = 0;
ei->i_format_parm[0] = 0;
ei->i_format_parm[1] = 0;
ei->i_format_parm[2] = 0;
- ei->i_section_size = isonum_733 (de->size);
+ ei->i_section_size = isonum_733(de->size);
if (de->flags[-high_sierra] & 0x80) {
- if(isofs_read_level3_size(inode)) goto fail;
+ ret = isofs_read_level3_size(inode);
+ if (ret < 0)
+ goto fail;
+ ret = -EIO;
} else {
ei->i_next_section_block = 0;
ei->i_next_section_offset = 0;
- inode->i_size = isonum_733 (de->size);
+ inode->i_size = isonum_733(de->size);
}
/*
@@ -1257,27 +1360,28 @@ static void isofs_read_inode(struct inode *inode)
* this CDROM was mounted with the cruft option.
*/
- if (sbi->s_cruft == 'y')
+ if (sbi->s_cruft)
inode->i_size &= 0x00ffffff;
if (de->interleave[0]) {
- printk("Interleaved files not (yet) supported.\n");
+ printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n");
inode->i_size = 0;
}
/* I have no idea what file_unit_size is used for, so
we will flag it for now */
if (de->file_unit_size[0] != 0) {
- printk("File unit size != 0 for ISO file (%ld).\n",
- inode->i_ino);
+ printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n",
+ inode->i_ino);
}
/* I have no idea what other flag bits are used for, so
we will flag it for now */
#ifdef DEBUG
if((de->flags[-high_sierra] & ~2)!= 0){
- printk("Unusual flag settings for ISO file (%ld %x).\n",
- inode->i_ino, de->flags[-high_sierra]);
+ printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file "
+ "(%ld %x).\n",
+ inode->i_ino, de->flags[-high_sierra]);
}
#endif
@@ -1288,12 +1392,11 @@ static void isofs_read_inode(struct inode *inode)
inode->i_atime.tv_nsec =
inode->i_ctime.tv_nsec = 0;
- ei->i_first_extent = (isonum_733 (de->extent) +
- isonum_711 (de->ext_attr_length));
+ ei->i_first_extent = (isonum_733(de->extent) +
+ isonum_711(de->ext_attr_length));
/* Set the number of blocks for stat() - should be done before RR */
- inode->i_blksize = PAGE_CACHE_SIZE; /* For stat() only */
- inode->i_blocks = (inode->i_size + 511) >> 9;
+ inode->i_blocks = (inode->i_size + 511) >> 9;
/*
* Now test for possible Rock Ridge extensions which will override
@@ -1303,14 +1406,23 @@ static void isofs_read_inode(struct inode *inode)
if (!high_sierra) {
parse_rock_ridge_inode(de, inode);
/* if we want uid/gid set, override the rock ridge setting */
- test_and_set_uid(&inode->i_uid, sbi->s_uid);
- test_and_set_gid(&inode->i_gid, sbi->s_gid);
+ if (sbi->s_uid_set)
+ inode->i_uid = sbi->s_uid;
+ if (sbi->s_gid_set)
+ inode->i_gid = sbi->s_gid;
}
+ /* Now set final access rights if overriding rock ridge setting */
+ if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm &&
+ sbi->s_dmode != ISOFS_INVALID_MODE)
+ inode->i_mode = S_IFDIR | sbi->s_dmode;
+ if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm &&
+ sbi->s_fmode != ISOFS_INVALID_MODE)
+ inode->i_mode = S_IFREG | sbi->s_fmode;
/* Install the inode operations vector */
if (S_ISREG(inode->i_mode)) {
inode->i_fop = &generic_ro_fops;
- switch ( ei->i_file_format ) {
+ switch (ei->i_file_format) {
#ifdef CONFIG_ZISOFS
case isofs_file_compressed:
inode->i_data.a_ops = &zisofs_aops;
@@ -1330,16 +1442,16 @@ static void isofs_read_inode(struct inode *inode)
/* XXX - parse_rock_ridge_inode() had already set i_rdev. */
init_special_inode(inode, inode->i_mode, inode->i_rdev);
+ ret = 0;
out:
kfree(tmpde);
if (bh)
brelse(bh);
- return;
+ return ret;
out_badread:
printk(KERN_WARNING "ISOFS: unable to read i-node block\n");
fail:
- make_bad_inode(inode);
goto out;
}
@@ -1354,7 +1466,7 @@ static int isofs_iget5_test(struct inode *ino, void *data)
struct isofs_iget5_callback_data *d =
(struct isofs_iget5_callback_data*)data;
return (i->i_iget5_block == d->block)
- && (i->i_iget5_offset == d->offset);
+ && (i->i_iget5_offset == d->offset);
}
static int isofs_iget5_set(struct inode *ino, void *data)
@@ -1378,9 +1490,10 @@ struct inode *isofs_iget(struct super_block *sb,
unsigned long hashval;
struct inode *inode;
struct isofs_iget5_callback_data data;
+ long ret;
if (offset >= 1ul << sb->s_blocksize_bits)
- return NULL;
+ return ERR_PTR(-EINVAL);
data.block = block;
data.offset = offset;
@@ -1388,29 +1501,42 @@ struct inode *isofs_iget(struct super_block *sb,
hashval = (block << sb->s_blocksize_bits) | offset;
inode = iget5_locked(sb, hashval, &isofs_iget5_test,
- &isofs_iget5_set, &data);
+ &isofs_iget5_set, &data);
+
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
- if (inode && (inode->i_state & I_NEW)) {
- sb->s_op->read_inode(inode);
- unlock_new_inode(inode);
+ if (inode->i_state & I_NEW) {
+ ret = isofs_read_inode(inode);
+ if (ret < 0) {
+ iget_failed(inode);
+ inode = ERR_PTR(ret);
+ } else {
+ unlock_new_inode(inode);
+ }
}
return inode;
}
-static struct super_block *isofs_get_sb(struct file_system_type *fs_type,
+static struct dentry *isofs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
+ /* We don't support read-write mounts */
+ if (!(flags & MS_RDONLY))
+ return ERR_PTR(-EACCES);
+ return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
}
static struct file_system_type iso9660_fs_type = {
.owner = THIS_MODULE,
.name = "iso9660",
- .get_sb = isofs_get_sb,
+ .mount = isofs_mount,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS_FS("iso9660");
+MODULE_ALIAS("iso9660");
static int __init init_iso9660_fs(void)
{
@@ -1448,5 +1574,3 @@ static void __exit exit_iso9660_fs(void)
module_init(init_iso9660_fs)
module_exit(exit_iso9660_fs)
MODULE_LICENSE("GPL");
-/* Actual filesystem name is iso9660, as requested in filesystems.c */
-MODULE_ALIAS("iso9660");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:21:17 +0000