diff options
Diffstat (limited to 'fs/fat/fat.h')
| -rw-r--r-- | fs/fat/fat.h | 97 |
1 files changed, 58 insertions, 39 deletions
diff --git a/fs/fat/fat.h b/fs/fat/fat.h index 7d8e0dcac5d..ca7e8f8bad7 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -5,6 +5,7 @@ #include <linux/string.h> #include <linux/nls.h> #include <linux/fs.h> +#include <linux/hash.h> #include <linux/mutex.h> #include <linux/ratelimit.h> #include <linux/msdos_fs.h> @@ -27,26 +28,27 @@ struct fat_mount_options { kgid_t fs_gid; unsigned short fs_fmask; unsigned short fs_dmask; - unsigned short codepage; /* Codepage for shortname conversions */ - char *iocharset; /* Charset used for filename input/display */ - unsigned short shortname; /* flags for shortname display/create rule */ - unsigned char name_check; /* r = relaxed, n = normal, s = strict */ - unsigned char errors; /* On error: continue, panic, remount-ro */ + unsigned short codepage; /* Codepage for shortname conversions */ + char *iocharset; /* Charset used for filename input/display */ + unsigned short shortname; /* flags for shortname display/create rule */ + unsigned char name_check; /* r = relaxed, n = normal, s = strict */ + unsigned char errors; /* On error: continue, panic, remount-ro */ unsigned short allow_utime;/* permission for setting the [am]time */ - unsigned quiet:1, /* set = fake successful chmods and chowns */ - showexec:1, /* set = only set x bit for com/exe/bat */ - sys_immutable:1, /* set = system files are immutable */ - dotsOK:1, /* set = hidden and system files are named '.filename' */ - isvfat:1, /* 0=no vfat long filename support, 1=vfat support */ - utf8:1, /* Use of UTF-8 character set (Default) */ - unicode_xlate:1, /* create escape sequences for unhandled Unicode */ - numtail:1, /* Does first alias have a numeric '~1' type tail? */ - flush:1, /* write things quickly */ - nocase:1, /* Does this need case conversion? 0=need case conversion*/ - usefree:1, /* Use free_clusters for FAT32 */ - tz_utc:1, /* Filesystem timestamps are in UTC */ - rodir:1, /* allow ATTR_RO for directory */ - discard:1; /* Issue discard requests on deletions */ + unsigned quiet:1, /* set = fake successful chmods and chowns */ + showexec:1, /* set = only set x bit for com/exe/bat */ + sys_immutable:1, /* set = system files are immutable */ + dotsOK:1, /* set = hidden and system files are named '.filename' */ + isvfat:1, /* 0=no vfat long filename support, 1=vfat support */ + utf8:1, /* Use of UTF-8 character set (Default) */ + unicode_xlate:1, /* create escape sequences for unhandled Unicode */ + numtail:1, /* Does first alias have a numeric '~1' type tail? */ + flush:1, /* write things quickly */ + nocase:1, /* Does this need case conversion? 0=need case conversion*/ + usefree:1, /* Use free_clusters for FAT32 */ + tz_utc:1, /* Filesystem timestamps are in UTC */ + rodir:1, /* allow ATTR_RO for directory */ + discard:1, /* Issue discard requests on deletions */ + nfs:1; /* Do extra work needed for NFS export */ }; #define FAT_HASH_BITS 8 @@ -56,28 +58,28 @@ struct fat_mount_options { * MS-DOS file system in-core superblock data */ struct msdos_sb_info { - unsigned short sec_per_clus; /* sectors/cluster */ - unsigned short cluster_bits; /* log2(cluster_size) */ - unsigned int cluster_size; /* cluster size */ - unsigned char fats,fat_bits; /* number of FATs, FAT bits (12 or 16) */ + unsigned short sec_per_clus; /* sectors/cluster */ + unsigned short cluster_bits; /* log2(cluster_size) */ + unsigned int cluster_size; /* cluster size */ + unsigned char fats, fat_bits; /* number of FATs, FAT bits (12 or 16) */ unsigned short fat_start; - unsigned long fat_length; /* FAT start & length (sec.) */ + unsigned long fat_length; /* FAT start & length (sec.) */ unsigned long dir_start; - unsigned short dir_entries; /* root dir start & entries */ - unsigned long data_start; /* first data sector */ - unsigned long max_cluster; /* maximum cluster number */ - unsigned long root_cluster; /* first cluster of the root directory */ - unsigned long fsinfo_sector; /* sector number of FAT32 fsinfo */ + unsigned short dir_entries; /* root dir start & entries */ + unsigned long data_start; /* first data sector */ + unsigned long max_cluster; /* maximum cluster number */ + unsigned long root_cluster; /* first cluster of the root directory */ + unsigned long fsinfo_sector; /* sector number of FAT32 fsinfo */ struct mutex fat_lock; - unsigned int prev_free; /* previously allocated cluster number */ - unsigned int free_clusters; /* -1 if undefined */ + unsigned int prev_free; /* previously allocated cluster number */ + unsigned int free_clusters; /* -1 if undefined */ unsigned int free_clus_valid; /* is free_clusters valid? */ struct fat_mount_options options; - struct nls_table *nls_disk; /* Codepage used on disk */ - struct nls_table *nls_io; /* Charset used for input and display */ - 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) */ + struct nls_table *nls_disk; /* Codepage used on disk */ + struct nls_table *nls_io; /* Charset used for input and display */ + 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) */ int fatent_shift; struct fatent_operations *fatent_ops; @@ -88,6 +90,9 @@ struct msdos_sb_info { spinlock_t inode_hash_lock; struct hlist_head inode_hashtable[FAT_HASH_SIZE]; + + spinlock_t dir_hash_lock; + struct hlist_head dir_hashtable[FAT_HASH_SIZE]; }; #define FAT_CACHE_VALID 0 /* special case for valid cache */ @@ -110,6 +115,7 @@ struct msdos_inode_info { int i_attrs; /* unused attribute bits */ loff_t i_pos; /* on-disk position of directory entry or 0 */ struct hlist_node i_fat_hash; /* hash by i_location */ + struct hlist_node i_dir_hash; /* hash by i_logstart */ struct rw_semaphore truncate_lock; /* protect bmap against truncate */ struct inode vfs_inode; }; @@ -262,7 +268,7 @@ extern int fat_subdirs(struct inode *dir); extern int fat_scan(struct inode *dir, const unsigned char *name, struct fat_slot_info *sinfo); extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh, - struct msdos_dir_entry **de, loff_t *i_pos); + struct msdos_dir_entry **de); extern int fat_alloc_new_dir(struct inode *dir, struct timespec *ts); extern int fat_add_entries(struct inode *dir, void *slots, int nr_slots, struct fat_slot_info *sinfo); @@ -322,7 +328,7 @@ extern long fat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); extern const struct file_operations fat_file_operations; extern const struct inode_operations fat_file_inode_operations; -extern int fat_setattr(struct dentry * dentry, struct iattr * attr); +extern int fat_setattr(struct dentry *dentry, struct iattr *attr); extern void fat_truncate_blocks(struct inode *inode, loff_t offset); extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); @@ -340,7 +346,12 @@ extern int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat, void (*setup)(struct super_block *)); extern int fat_flush_inodes(struct super_block *sb, struct inode *i1, - struct inode *i2); + struct inode *i2); +static inline unsigned long fat_dir_hash(int logstart) +{ + return hash_32(logstart, FAT_HASH_BITS); +} + /* fat/misc.c */ extern __printf(3, 4) __cold void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...); @@ -366,6 +377,14 @@ extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs); int fat_cache_init(void); void fat_cache_destroy(void); +/* fat/nfs.c */ +struct fid; +extern struct dentry *fat_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type); +extern struct dentry *fat_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type); +extern struct dentry *fat_get_parent(struct dentry *child_dir); + /* helper for printk */ typedef unsigned long long llu; |