diff options
Diffstat (limited to 'fs/isofs')
-rw-r--r-- | fs/isofs/dir.c | 3 | ||||
-rw-r--r-- | fs/isofs/inode.c | 30 | ||||
-rw-r--r-- | fs/isofs/isofs.h | 24 | ||||
-rw-r--r-- | fs/isofs/namei.c | 13 | ||||
-rw-r--r-- | fs/isofs/rock.c | 55 |
5 files changed, 79 insertions, 46 deletions
diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c index 0542b6e..f20437c 100644 --- a/fs/isofs/dir.c +++ b/fs/isofs/dir.c @@ -254,19 +254,16 @@ static int isofs_readdir(struct file *filp, char *tmpname; struct iso_directory_record *tmpde; struct inode *inode = filp->f_path.dentry->d_inode; - struct isofs_sb_info *sbi = ISOFS_SB(inode->i_sb); tmpname = (char *)__get_free_page(GFP_KERNEL); if (tmpname == NULL) return -ENOMEM; - mutex_lock(&sbi->s_mutex); tmpde = (struct iso_directory_record *) (tmpname+1024); result = do_isofs_readdir(inode, filp, dirent, filldir, tmpname, tmpde); free_page((unsigned long) tmpname); - mutex_unlock(&sbi->s_mutex); return result; } diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index 26f6364..2f9197f 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -20,6 +20,7 @@ #include <linux/statfs.h> #include <linux/cdrom.h> #include <linux/parser.h> +#include <linux/mpage.h> #include "isofs.h" #include "zisofs.h" @@ -67,7 +68,7 @@ static void isofs_put_super(struct super_block *sb) return; } -static int isofs_read_inode(struct inode *); +static int isofs_read_inode(struct inode *, int relocated); static int isofs_statfs (struct dentry *, struct kstatfs *); static struct kmem_cache *isofs_inode_cachep; @@ -854,7 +855,6 @@ root_found: sbi->s_utf8 = opt.utf8; sbi->s_nocompress = opt.nocompress; sbi->s_overriderockperm = opt.overriderockperm; - mutex_init(&sbi->s_mutex); /* * 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 @@ -1140,7 +1140,13 @@ 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) @@ -1150,6 +1156,7 @@ static sector_t _isofs_bmap(struct address_space *mapping, sector_t block) static const struct address_space_operations isofs_aops = { .readpage = isofs_readpage, + .readpages = isofs_readpages, .bmap = _isofs_bmap }; @@ -1256,7 +1263,7 @@ out_toomany: goto out; } -static int isofs_read_inode(struct inode *inode) +static int isofs_read_inode(struct inode *inode, int relocated) { struct super_block *sb = inode->i_sb; struct isofs_sb_info *sbi = ISOFS_SB(sb); @@ -1311,7 +1318,7 @@ static int isofs_read_inode(struct inode *inode) inode->i_mode = S_IFDIR | sbi->s_dmode; else inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; - inode->i_nlink = 1; /* + 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 @@ -1329,7 +1336,7 @@ static int isofs_read_inode(struct inode *inode) */ inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO; } - inode->i_nlink = 1; + set_nlink(inode, 1); } inode->i_uid = sbi->s_uid; inode->i_gid = sbi->s_gid; @@ -1401,7 +1408,7 @@ static int isofs_read_inode(struct inode *inode) */ if (!high_sierra) { - parse_rock_ridge_inode(de, inode); + parse_rock_ridge_inode(de, inode, relocated); /* if we want uid/gid set, override the rock ridge setting */ if (sbi->s_uid_set) inode->i_uid = sbi->s_uid; @@ -1480,9 +1487,10 @@ static int isofs_iget5_set(struct inode *ino, void *data) * offset that point to the underlying meta-data for the inode. The * code below is otherwise similar to the iget() code in * include/linux/fs.h */ -struct inode *isofs_iget(struct super_block *sb, - unsigned long block, - unsigned long offset) +struct inode *__isofs_iget(struct super_block *sb, + unsigned long block, + unsigned long offset, + int relocated) { unsigned long hashval; struct inode *inode; @@ -1504,7 +1512,7 @@ struct inode *isofs_iget(struct super_block *sb, return ERR_PTR(-ENOMEM); if (inode->i_state & I_NEW) { - ret = isofs_read_inode(inode); + ret = isofs_read_inode(inode, relocated); if (ret < 0) { iget_failed(inode); inode = ERR_PTR(ret); diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h index 2882dc0..f9c9793 100644 --- a/fs/isofs/isofs.h +++ b/fs/isofs/isofs.h @@ -55,7 +55,6 @@ struct isofs_sb_info { gid_t s_gid; uid_t s_uid; struct nls_table *s_nls_iocharset; /* Native language support table */ - struct mutex s_mutex; /* replaces BKL, please remove if possible */ }; #define ISOFS_INVALID_MODE ((mode_t) -1) @@ -108,7 +107,7 @@ extern int iso_date(char *, int); struct inode; /* To make gcc happy */ -extern int parse_rock_ridge_inode(struct iso_directory_record *, struct inode *); +extern int parse_rock_ridge_inode(struct iso_directory_record *, struct inode *, int relocated); extern int get_rock_ridge_filename(struct iso_directory_record *, char *, struct inode *); extern int isofs_name_translate(struct iso_directory_record *, char *, struct inode *); @@ -119,9 +118,24 @@ extern struct dentry *isofs_lookup(struct inode *, struct dentry *, struct namei extern struct buffer_head *isofs_bread(struct inode *, sector_t); extern int isofs_get_blocks(struct inode *, sector_t, struct buffer_head **, unsigned long); -extern struct inode *isofs_iget(struct super_block *sb, - unsigned long block, - unsigned long offset); +struct inode *__isofs_iget(struct super_block *sb, + unsigned long block, + unsigned long offset, + int relocated); + +static inline struct inode *isofs_iget(struct super_block *sb, + unsigned long block, + unsigned long offset) +{ + return __isofs_iget(sb, block, offset, 0); +} + +static inline struct inode *isofs_iget_reloc(struct super_block *sb, + unsigned long block, + unsigned long offset) +{ + return __isofs_iget(sb, block, offset, 1); +} /* Because the inode number is no longer relevant to finding the * underlying meta-data for an inode, we are free to choose a more diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c index 4fb3e80..1e2946f 100644 --- a/fs/isofs/namei.c +++ b/fs/isofs/namei.c @@ -168,7 +168,6 @@ struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nam int found; unsigned long uninitialized_var(block); unsigned long uninitialized_var(offset); - struct isofs_sb_info *sbi = ISOFS_SB(dir->i_sb); struct inode *inode; struct page *page; @@ -176,21 +175,13 @@ struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nam if (!page) return ERR_PTR(-ENOMEM); - mutex_lock(&sbi->s_mutex); found = isofs_find_entry(dir, dentry, &block, &offset, page_address(page), 1024 + page_address(page)); __free_page(page); - inode = NULL; - if (found) { - inode = isofs_iget(dir->i_sb, block, offset); - if (IS_ERR(inode)) { - mutex_unlock(&sbi->s_mutex); - return ERR_CAST(inode); - } - } - mutex_unlock(&sbi->s_mutex); + inode = found ? isofs_iget(dir->i_sb, block, offset) : NULL; + return d_splice_alias(inode, dentry); } diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c index f9cd04d..1780949 100644 --- a/fs/isofs/rock.c +++ b/fs/isofs/rock.c @@ -30,6 +30,7 @@ struct rock_state { int cont_size; int cont_extent; int cont_offset; + int cont_loops; struct inode *inode; }; @@ -73,6 +74,9 @@ static void init_rock_state(struct rock_state *rs, struct inode *inode) rs->inode = inode; } +/* Maximum number of Rock Ridge continuation entries */ +#define RR_MAX_CE_ENTRIES 32 + /* * Returns 0 if the caller should continue scanning, 1 if the scan must end * and -ve on error. @@ -105,6 +109,8 @@ static int rock_continue(struct rock_state *rs) goto out; } ret = -EIO; + if (++rs->cont_loops >= RR_MAX_CE_ENTRIES) + goto out; bh = sb_bread(rs->inode->i_sb, rs->cont_extent); if (bh) { memcpy(rs->buffer, bh->b_data + rs->cont_offset, @@ -288,12 +294,16 @@ eio: goto out; } +#define RR_REGARD_XA 1 +#define RR_RELOC_DE 2 + static int parse_rock_ridge_inode_internal(struct iso_directory_record *de, - struct inode *inode, int regard_xa) + struct inode *inode, int flags) { int symlink_len = 0; int cnt, sig; + unsigned int reloc_block; struct inode *reloc; struct rock_ridge *rr; int rootflag; @@ -305,7 +315,7 @@ parse_rock_ridge_inode_internal(struct iso_directory_record *de, init_rock_state(&rs, inode); setup_rock_ridge(de, inode, &rs); - if (regard_xa) { + if (flags & RR_REGARD_XA) { rs.chr += 14; rs.len -= 14; if (rs.len < 0) @@ -352,6 +362,9 @@ repeat: rs.cont_size = isonum_733(rr->u.CE.size); break; case SIG('E', 'R'): + /* Invalid length of ER tag id? */ + if (rr->u.ER.len_id + offsetof(struct rock_ridge, u.ER.data) > rr->len) + goto out; ISOFS_SB(inode->i_sb)->s_rock = 1; printk(KERN_DEBUG "ISO 9660 Extensions: "); { @@ -363,7 +376,7 @@ repeat: break; case SIG('P', 'X'): inode->i_mode = isonum_733(rr->u.PX.mode); - inode->i_nlink = isonum_733(rr->u.PX.n_links); + set_nlink(inode, isonum_733(rr->u.PX.n_links)); inode->i_uid = isonum_733(rr->u.PX.uid); inode->i_gid = isonum_733(rr->u.PX.gid); break; @@ -485,18 +498,28 @@ repeat: "relocated directory\n"); goto out; case SIG('C', 'L'): - ISOFS_I(inode)->i_first_extent = - isonum_733(rr->u.CL.location); - reloc = - isofs_iget(inode->i_sb, - ISOFS_I(inode)->i_first_extent, - 0); + if (flags & RR_RELOC_DE) { + printk(KERN_ERR + "ISOFS: Recursive directory relocation " + "is not supported\n"); + goto eio; + } + reloc_block = isonum_733(rr->u.CL.location); + if (reloc_block == ISOFS_I(inode)->i_iget5_block && + ISOFS_I(inode)->i_iget5_offset == 0) { + printk(KERN_ERR + "ISOFS: Directory relocation points to " + "itself\n"); + goto eio; + } + ISOFS_I(inode)->i_first_extent = reloc_block; + reloc = isofs_iget_reloc(inode->i_sb, reloc_block, 0); if (IS_ERR(reloc)) { ret = PTR_ERR(reloc); goto out; } inode->i_mode = reloc->i_mode; - inode->i_nlink = reloc->i_nlink; + set_nlink(inode, reloc->i_nlink); inode->i_uid = reloc->i_uid; inode->i_gid = reloc->i_gid; inode->i_rdev = reloc->i_rdev; @@ -637,9 +660,11 @@ static char *get_symlink_chunk(char *rpnt, struct rock_ridge *rr, char *plimit) return rpnt; } -int parse_rock_ridge_inode(struct iso_directory_record *de, struct inode *inode) +int parse_rock_ridge_inode(struct iso_directory_record *de, struct inode *inode, + int relocated) { - int result = parse_rock_ridge_inode_internal(de, inode, 0); + int flags = relocated ? RR_RELOC_DE : 0; + int result = parse_rock_ridge_inode_internal(de, inode, flags); /* * if rockridge flag was reset and we didn't look for attributes @@ -647,7 +672,8 @@ int parse_rock_ridge_inode(struct iso_directory_record *de, struct inode *inode) */ if ((ISOFS_SB(inode->i_sb)->s_rock_offset == -1) && (ISOFS_SB(inode->i_sb)->s_rock == 2)) { - result = parse_rock_ridge_inode_internal(de, inode, 14); + result = parse_rock_ridge_inode_internal(de, inode, + flags | RR_REGARD_XA); } return result; } @@ -678,7 +704,6 @@ static int rock_ridge_symlink_readpage(struct file *file, struct page *page) init_rock_state(&rs, inode); block = ei->i_iget5_block; - mutex_lock(&sbi->s_mutex); bh = sb_bread(inode->i_sb, block); if (!bh) goto out_noread; @@ -748,7 +773,6 @@ repeat: goto fail; brelse(bh); *rpnt = '\0'; - mutex_unlock(&sbi->s_mutex); SetPageUptodate(page); kunmap(page); unlock_page(page); @@ -765,7 +789,6 @@ out_bad_span: printk("symlink spans iso9660 blocks\n"); fail: brelse(bh); - mutex_unlock(&sbi->s_mutex); error: SetPageError(page); kunmap(page); |