diff options
Diffstat (limited to 'fs/fat')
-rw-r--r-- | fs/fat/dir.c | 104 | ||||
-rw-r--r-- | fs/fat/fat.h | 1 | ||||
-rw-r--r-- | fs/fat/file.c | 8 | ||||
-rw-r--r-- | fs/fat/inode.c | 12 | ||||
-rw-r--r-- | fs/fat/misc.c | 5 | ||||
-rw-r--r-- | fs/fat/namei_msdos.c | 6 | ||||
-rw-r--r-- | fs/fat/namei_vfat.c | 12 |
7 files changed, 83 insertions, 65 deletions
diff --git a/fs/fat/dir.c b/fs/fat/dir.c index 7a6f02c..3963ede 100644 --- a/fs/fat/dir.c +++ b/fs/fat/dir.c @@ -543,6 +543,7 @@ end_of_dir: EXPORT_SYMBOL_GPL(fat_search_long); struct fat_ioctl_filldir_callback { + struct dir_context ctx; void __user *dirent; int result; /* for dir ioctl */ @@ -552,8 +553,9 @@ struct fat_ioctl_filldir_callback { int short_len; }; -static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent, - filldir_t filldir, int short_only, int both) +static int __fat_readdir(struct inode *inode, struct file *file, + struct dir_context *ctx, int short_only, + struct fat_ioctl_filldir_callback *both) { struct super_block *sb = inode->i_sb; struct msdos_sb_info *sbi = MSDOS_SB(sb); @@ -564,27 +566,20 @@ static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent, unsigned char bufname[FAT_MAX_SHORT_SIZE]; int isvfat = sbi->options.isvfat; const char *fill_name = NULL; - unsigned long inum; - unsigned long lpos, dummy, *furrfu = &lpos; + int fake_offset = 0; loff_t cpos; int short_len = 0, fill_len = 0; int ret = 0; mutex_lock(&sbi->s_lock); - cpos = filp->f_pos; + cpos = ctx->pos; /* Fake . and .. for the root directory. */ if (inode->i_ino == MSDOS_ROOT_INO) { - while (cpos < 2) { - if (filldir(dirent, "..", cpos+1, cpos, - MSDOS_ROOT_INO, DT_DIR) < 0) - goto out; - cpos++; - filp->f_pos++; - } - if (cpos == 2) { - dummy = 2; - furrfu = &dummy; + if (!dir_emit_dots(file, ctx)) + goto out; + if (ctx->pos == 2) { + fake_offset = 1; cpos = 0; } } @@ -619,7 +614,7 @@ parse_record: int status = fat_parse_long(inode, &cpos, &bh, &de, &unicode, &nr_slots); if (status < 0) { - filp->f_pos = cpos; + ctx->pos = cpos; ret = status; goto out; } else if (status == PARSE_INVALID) @@ -639,6 +634,19 @@ parse_record: /* !both && !short_only, so we don't need shortname. */ if (!both) goto start_filldir; + + short_len = fat_parse_short(sb, de, bufname, + sbi->options.dotsOK); + if (short_len == 0) + goto record_end; + /* hack for fat_ioctl_filldir() */ + both->longname = fill_name; + both->long_len = fill_len; + both->shortname = bufname; + both->short_len = short_len; + fill_name = NULL; + fill_len = 0; + goto start_filldir; } } @@ -646,28 +654,21 @@ parse_record: if (short_len == 0) goto record_end; - if (nr_slots) { - /* hack for fat_ioctl_filldir() */ - struct fat_ioctl_filldir_callback *p = dirent; - - p->longname = fill_name; - p->long_len = fill_len; - p->shortname = bufname; - p->short_len = short_len; - fill_name = NULL; - fill_len = 0; - } else { - fill_name = bufname; - fill_len = short_len; - } + fill_name = bufname; + fill_len = short_len; start_filldir: - lpos = cpos - (nr_slots + 1) * sizeof(struct msdos_dir_entry); - if (!memcmp(de->name, MSDOS_DOT, MSDOS_NAME)) - inum = inode->i_ino; - else if (!memcmp(de->name, MSDOS_DOTDOT, MSDOS_NAME)) { - inum = parent_ino(filp->f_path.dentry); + if (!fake_offset) + ctx->pos = cpos - (nr_slots + 1) * sizeof(struct msdos_dir_entry); + + if (!memcmp(de->name, MSDOS_DOT, MSDOS_NAME)) { + if (!dir_emit_dot(file, ctx)) + goto fill_failed; + } else if (!memcmp(de->name, MSDOS_DOTDOT, MSDOS_NAME)) { + if (!dir_emit_dotdot(file, ctx)) + goto fill_failed; } else { + unsigned long inum; loff_t i_pos = fat_make_i_pos(sb, bh, de); struct inode *tmp = fat_iget(sb, i_pos); if (tmp) { @@ -675,18 +676,17 @@ start_filldir: iput(tmp); } else inum = iunique(sb, MSDOS_ROOT_INO); + if (!dir_emit(ctx, fill_name, fill_len, inum, + (de->attr & ATTR_DIR) ? DT_DIR : DT_REG)) + goto fill_failed; } - if (filldir(dirent, fill_name, fill_len, *furrfu, inum, - (de->attr & ATTR_DIR) ? DT_DIR : DT_REG) < 0) - goto fill_failed; - record_end: - furrfu = &lpos; - filp->f_pos = cpos; + fake_offset = 0; + ctx->pos = cpos; goto get_new; end_of_dir: - filp->f_pos = cpos; + ctx->pos = cpos; fill_failed: brelse(bh); if (unicode) @@ -696,10 +696,9 @@ out: return ret; } -static int fat_readdir(struct file *filp, void *dirent, filldir_t filldir) +static int fat_readdir(struct file *file, struct dir_context *ctx) { - struct inode *inode = file_inode(filp); - return __fat_readdir(inode, filp, dirent, filldir, 0, 0); + return __fat_readdir(file_inode(file), file, ctx, 0, NULL); } #define FAT_IOCTL_FILLDIR_FUNC(func, dirent_type) \ @@ -755,20 +754,25 @@ efault: \ FAT_IOCTL_FILLDIR_FUNC(fat_ioctl_filldir, __fat_dirent) -static int fat_ioctl_readdir(struct inode *inode, struct file *filp, +static int fat_ioctl_readdir(struct inode *inode, struct file *file, void __user *dirent, filldir_t filldir, int short_only, int both) { - struct fat_ioctl_filldir_callback buf; + struct fat_ioctl_filldir_callback buf = { + .ctx.actor = filldir, + .dirent = dirent + }; int ret; buf.dirent = dirent; buf.result = 0; mutex_lock(&inode->i_mutex); + buf.ctx.pos = file->f_pos; ret = -ENOENT; if (!IS_DEADDIR(inode)) { - ret = __fat_readdir(inode, filp, &buf, filldir, - short_only, both); + ret = __fat_readdir(inode, file, &buf.ctx, + short_only, both ? &buf : NULL); + file->f_pos = buf.ctx.pos; } mutex_unlock(&inode->i_mutex); if (ret >= 0) @@ -854,7 +858,7 @@ static long fat_compat_dir_ioctl(struct file *filp, unsigned cmd, const struct file_operations fat_dir_operations = { .llseek = generic_file_llseek, .read = generic_read_dir, - .readdir = fat_readdir, + .iterate = fat_readdir, .unlocked_ioctl = fat_dir_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = fat_compat_dir_ioctl, diff --git a/fs/fat/fat.h b/fs/fat/fat.h index 21664fc..4241e6f 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -86,6 +86,7 @@ struct msdos_sb_info { const void *dir_ops; /* Opaque; default directory operations */ int dir_per_block; /* dir entries per block */ int dir_per_block_bits; /* log2(dir_per_block) */ + unsigned int vol_id; /*volume ID*/ int fatent_shift; struct fatent_operations *fatent_ops; diff --git a/fs/fat/file.c b/fs/fat/file.c index b0b632e..9b104f5 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -114,6 +114,12 @@ out: return err; } +static int fat_ioctl_get_volume_id(struct inode *inode, u32 __user *user_attr) +{ + struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); + return put_user(sbi->vol_id, user_attr); +} + long fat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct inode *inode = file_inode(filp); @@ -124,6 +130,8 @@ long fat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return fat_ioctl_get_attributes(inode, user_attr); case FAT_IOCTL_SET_ATTRIBUTES: return fat_ioctl_set_attributes(filp, user_attr); + case FAT_IOCTL_GET_VOLUME_ID: + return fat_ioctl_get_volume_id(inode, user_attr); default: return -ENOTTY; /* Inappropriate ioctl for device */ } diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 5d4513c..11b51bb 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -1415,6 +1415,18 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat, brelse(fsinfo_bh); } + /* interpret volume ID as a little endian 32 bit integer */ + if (sbi->fat_bits == 32) + sbi->vol_id = (((u32)b->fat32.vol_id[0]) | + ((u32)b->fat32.vol_id[1] << 8) | + ((u32)b->fat32.vol_id[2] << 16) | + ((u32)b->fat32.vol_id[3] << 24)); + else /* fat 16 or 12 */ + sbi->vol_id = (((u32)b->fat16.vol_id[0]) | + ((u32)b->fat16.vol_id[1] << 8) | + ((u32)b->fat16.vol_id[2] << 16) | + ((u32)b->fat16.vol_id[3] << 24)); + sbi->dir_per_block = sb->s_blocksize / sizeof(struct msdos_dir_entry); sbi->dir_per_block_bits = ffs(sbi->dir_per_block) - 1; diff --git a/fs/fat/misc.c b/fs/fat/misc.c index 359d307..628e22a 100644 --- a/fs/fat/misc.c +++ b/fs/fat/misc.c @@ -30,7 +30,7 @@ void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...) va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; - printk(KERN_ERR "FAT-fs (%s): error, %pV\n", sb->s_id, &vaf); + fat_msg(sb, KERN_ERR, "error, %pV", &vaf); va_end(args); } @@ -38,8 +38,7 @@ void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...) panic("FAT-fs (%s): fs panic from previous error\n", sb->s_id); else if (opts->errors == FAT_ERRORS_RO && !(sb->s_flags & MS_RDONLY)) { sb->s_flags |= MS_RDONLY; - printk(KERN_ERR "FAT-fs (%s): Filesystem has been " - "set read-only\n", sb->s_id); + fat_msg(sb, KERN_ERR, "Filesystem has been set read-only"); } } EXPORT_SYMBOL_GPL(__fat_fs_error); diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c index 081b759..a783b0e 100644 --- a/fs/fat/namei_msdos.c +++ b/fs/fat/namei_msdos.c @@ -148,8 +148,7 @@ static int msdos_find(struct inode *dir, const unsigned char *name, int len, * that the existing dentry can be used. The msdos fs routines will * return ENOENT or EINVAL as appropriate. */ -static int msdos_hash(const struct dentry *dentry, const struct inode *inode, - struct qstr *qstr) +static int msdos_hash(const struct dentry *dentry, struct qstr *qstr) { struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options; unsigned char msdos_name[MSDOS_NAME]; @@ -165,8 +164,7 @@ static int msdos_hash(const struct dentry *dentry, const struct inode *inode, * Compare two msdos names. If either of the names are invalid, * we fall back to doing the standard name comparison. */ -static int msdos_cmp(const struct dentry *parent, const struct inode *pinode, - const struct dentry *dentry, const struct inode *inode, +static int msdos_cmp(const struct dentry *parent, const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name) { struct fat_mount_options *options = &MSDOS_SB(parent->d_sb)->options; diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 2da9520..6df8d3d 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -107,8 +107,7 @@ static unsigned int vfat_striptail_len(const struct qstr *qstr) * that the existing dentry can be used. The vfat fs routines will * return ENOENT or EINVAL as appropriate. */ -static int vfat_hash(const struct dentry *dentry, const struct inode *inode, - struct qstr *qstr) +static int vfat_hash(const struct dentry *dentry, struct qstr *qstr) { qstr->hash = full_name_hash(qstr->name, vfat_striptail_len(qstr)); return 0; @@ -120,8 +119,7 @@ static int vfat_hash(const struct dentry *dentry, const struct inode *inode, * that the existing dentry can be used. The vfat fs routines will * return ENOENT or EINVAL as appropriate. */ -static int vfat_hashi(const struct dentry *dentry, const struct inode *inode, - struct qstr *qstr) +static int vfat_hashi(const struct dentry *dentry, struct qstr *qstr) { struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io; const unsigned char *name; @@ -142,8 +140,7 @@ static int vfat_hashi(const struct dentry *dentry, const struct inode *inode, /* * Case insensitive compare of two vfat names. */ -static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode, - const struct dentry *dentry, const struct inode *inode, +static int vfat_cmpi(const struct dentry *parent, const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name) { struct nls_table *t = MSDOS_SB(parent->d_sb)->nls_io; @@ -162,8 +159,7 @@ static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode, /* * Case sensitive compare of two vfat names. */ -static int vfat_cmp(const struct dentry *parent, const struct inode *pinode, - const struct dentry *dentry, const struct inode *inode, +static int vfat_cmp(const struct dentry *parent, const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name) { unsigned int alen, blen; |