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Changeset 24df3834 in mainline


Ignore:
Timestamp:
2011-12-08T11:09:49Z (10 years ago)
Author:
Jakub Jermar <jakub@…>
Branches:
lfn, master
Children:
190c943
Parents:
2f016df (diff), e895352 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Merge from lp:mfs.

Location:
uspace
Files:
7 edited

Legend:

Unmodified
Added
Removed
  • uspace/lib/minix/minix.h

    r2f016df r24df3834  
    3939#define S_ISDIR(m)              (((m) & S_IFMT) == S_IFDIR)
    4040#define S_ISREG(m)              (((m) & S_IFMT) == S_IFREG)
    41 #define S_IFDIR                 0040000         /*Directory*/
    42 #define S_IFREG                 0100000         /*Regular file*/
     41#define S_IFDIR                 0040000         /* Directory */
     42#define S_IFREG                 0100000         /* Regular file */
    4343#define S_IFMT                  00170000
    4444
    45 /*The following block sizes are valid only on V3 filesystem*/
     45/* The following block sizes are valid only on V3 filesystem */
    4646#define MFS_MIN_BLOCKSIZE       1024
    4747#define MFS_MAX_BLOCKSIZE       4096
     
    8888#define MFS_ERROR_FS            0x0002
    8989
    90 /*MFS V1/V2 superblock data on disk*/
     90/* MFS V1/V2 superblock data on disk */
    9191struct mfs_superblock {
    92         /*Total number of inodes on the device*/
     92        /* Total number of inodes on the device */
    9393        uint16_t        s_ninodes;
    94         /*Total number of zones on the device*/
     94        /* Total number of zones on the device */
    9595        uint16_t        s_nzones;
    96         /*Number of inode bitmap blocks*/
     96        /* Number of inode bitmap blocks */
    9797        uint16_t        s_ibmap_blocks;
    98         /*Number of zone bitmap blocks*/
     98        /* Number of zone bitmap blocks */
    9999        uint16_t        s_zbmap_blocks;
    100         /*First data zone on device*/
     100        /* First data zone on device */
    101101        uint16_t        s_first_data_zone;
    102         /*Base 2 logarithm of the zone to block ratio*/
     102        /* Base 2 logarithm of the zone to block ratio */
    103103        uint16_t        s_log2_zone_size;
    104         /*Maximum file size expressed in bytes*/
     104        /* Maximum file size expressed in bytes */
    105105        uint32_t        s_max_file_size;
    106106        /*
     
    109109         */
    110110        uint16_t        s_magic;
    111         /*Flag used to detect FS errors*/
     111        /* Flag used to detect FS errors*/
    112112        uint16_t        s_state;
    113         /*Total number of zones on the device (V2 only)*/
     113        /* Total number of zones on the device (V2 only) */
    114114        uint32_t        s_nzones2;
    115115} __attribute__ ((packed));
    116116
    117117
    118 /*MFS V3 superblock data on disk*/
     118/* MFS V3 superblock data on disk */
    119119struct mfs3_superblock {
    120         /*Total number of inodes on the device*/
     120        /* Total number of inodes on the device */
    121121        uint32_t        s_ninodes;
    122122        uint16_t        s_pad0;
    123         /*Number of inode bitmap blocks*/
     123        /* Number of inode bitmap blocks */
    124124        int16_t         s_ibmap_blocks;
    125         /*Number of zone bitmap blocks*/
     125        /* Number of zone bitmap blocks */
    126126        int16_t         s_zbmap_blocks;
    127         /*First data zone on device*/
     127        /* First data zone on device */
    128128        uint16_t        s_first_data_zone;
    129         /*Base 2 logarithm of the zone to block ratio*/
     129        /* Base 2 logarithm of the zone to block ratio */
    130130        int16_t         s_log2_zone_size;
    131131        int16_t         s_pad1;
    132         /*Maximum file size expressed in bytes*/
     132        /* Maximum file size expressed in bytes */
    133133        uint32_t        s_max_file_size;
    134         /*Total number of zones on the device*/
     134        /* Total number of zones on the device */
    135135        uint32_t        s_nzones;
    136136        /*
     
    140140        int16_t         s_magic;
    141141        int16_t         s_pad2;
    142         /*Filesystem block size expressed in bytes*/
     142        /* Filesystem block size expressed in bytes */
    143143        uint16_t        s_block_size;
    144         /*Filesystem disk format version*/
     144        /* Filesystem disk format version */
    145145        int8_t          s_disk_version;
    146146} __attribute__ ((packed));
    147147
    148 /*MinixFS V1 inode structure as it is on disk*/
     148/* MinixFS V1 inode structure as it is on disk */
    149149struct mfs_inode {
    150150        uint16_t        i_mode;
     
    154154        uint8_t         i_gid;
    155155        uint8_t         i_nlinks;
    156         /*Block numbers for direct zones*/
     156        /* Block numbers for direct zones */
    157157        uint16_t        i_dzone[V1_NR_DIRECT_ZONES];
    158         /*Block numbers for indirect zones*/
     158        /* Block numbers for indirect zones */
    159159        uint16_t        i_izone[V1_NR_INDIRECT_ZONES];
    160160} __attribute__ ((packed));
    161161
    162 /*MinixFS V2 inode structure as it is on disk (also valid for V3).*/
     162/* MinixFS V2 inode structure as it is on disk (also valid for V3). */
    163163struct mfs2_inode {
    164164        uint16_t        i_mode;
     
    170170        int32_t         i_mtime;
    171171        int32_t         i_ctime;
    172         /*Block numbers for direct zones*/
     172        /* Block numbers for direct zones */
    173173        uint32_t        i_dzone[V2_NR_DIRECT_ZONES];
    174         /*Block numbers for indirect zones*/
     174        /* Block numbers for indirect zones */
    175175        uint32_t        i_izone[V2_NR_INDIRECT_ZONES];
    176176} __attribute__ ((packed));
    177177
    178 /*MinixFS V1/V2 directory entry on-disk structure*/
     178/* MinixFS V1/V2 directory entry on-disk structure */
    179179struct mfs_dentry {
    180180        uint16_t d_inum;
     
    182182};
    183183
    184 /*MinixFS V3 directory entry on-disk structure*/
     184/* MinixFS V3 directory entry on-disk structure */
    185185struct mfs3_dentry {
    186186        uint32_t d_inum;
  • uspace/srv/fs/mfs/mfs.h

    r2f016df r24df3834  
    4848#define NAME            "mfs"
    4949
    50 //#define DEBUG_MODE
     50/* #define DEBUG_MODE */
    5151
    5252#define min(a, b)       ((a) < (b) ? (a) : (b))
     
    7171} mfs_version_t;
    7272
    73 /*Generic MinixFS superblock*/
     73/* Generic MinixFS superblock */
    7474struct mfs_sb_info {
    7575        uint32_t ninodes;
     
    8484        uint16_t state;
    8585
    86         /*The following fields do not exist on disk but only in memory*/
     86        /* The following fields do not exist on disk but only in memory */
    8787        unsigned long itable_size;
    8888        mfs_version_t fs_version;
     
    9797};
    9898
    99 /*Generic MinixFS inode*/
     99/* Generic MinixFS inode */
    100100struct mfs_ino_info {
    101101        uint16_t        i_mode;
     
    107107        int32_t         i_mtime;
    108108        int32_t         i_ctime;
    109         /*Block numbers for direct zones*/
     109        /* Block numbers for direct zones */
    110110        uint32_t        i_dzone[V2_NR_DIRECT_ZONES];
    111         /*Block numbers for indirect zones*/
     111        /* Block numbers for indirect zones */
    112112        uint32_t        i_izone[V2_NR_INDIRECT_ZONES];
    113113
    114         /*The following fields do not exist on disk but only in memory*/
     114        /* The following fields do not exist on disk but only in memory */
    115115        bool dirty;
    116116        fs_index_t index;
    117117};
    118118
    119 /*Generic MFS directory entry*/
     119/* Generic MFS directory entry */
    120120struct mfs_dentry_info {
    121121        uint32_t d_inum;
    122122        char d_name[MFS3_MAX_NAME_LEN + 1];
    123123
    124         /*The following fields do not exist on disk but only in memory*/
    125 
    126         /*Index of the dentry in the list*/
     124        /* The following fields do not exist on disk but only in memory */
     125
     126        /* Index of the dentry in the list */
    127127        unsigned index;
    128         /*Pointer to the node at witch the dentry belongs*/
     128        /* Pointer to the node at witch the dentry belongs */
    129129        struct mfs_node *node;
    130130};
     
    136136};
    137137
    138 /*MinixFS node in core*/
     138/* MinixFS node in core */
    139139struct mfs_node {
    140140        struct mfs_ino_info *ino_i;
     
    145145};
    146146
    147 /*mfs_ops.c*/
     147/* mfs_ops.c */
    148148extern vfs_out_ops_t mfs_ops;
    149149extern libfs_ops_t mfs_libfs_ops;
     
    152152mfs_global_init(void);
    153153
    154 /*mfs_inode.c*/
     154/* mfs_inode.c */
    155155extern int
    156156mfs_get_inode(struct mfs_instance *inst, struct mfs_ino_info **ino_i,
    157           fs_index_t index);
     157    fs_index_t index);
    158158
    159159extern int
     
    163163mfs_inode_shrink(struct mfs_node *mnode, size_t size_shrink);
    164164
    165 /*mfs_rw.c*/
     165/* mfs_rw.c */
    166166extern int
    167167mfs_read_map(uint32_t *b, const struct mfs_node *mnode, const uint32_t pos);
     
    169169extern int
    170170mfs_write_map(struct mfs_node *mnode, uint32_t pos, uint32_t new_zone,
    171           uint32_t *old_zone);
     171    uint32_t *old_zone);
    172172
    173173extern int
    174174mfs_prune_ind_zones(struct mfs_node *mnode, size_t new_size);
    175175
    176 /*mfs_dentry.c*/
     176/* mfs_dentry.c */
    177177extern int
    178178mfs_read_dentry(struct mfs_node *mnode,
    179                      struct mfs_dentry_info *d_info, unsigned index);
     179    struct mfs_dentry_info *d_info, unsigned index);
    180180
    181181extern int
     
    188188mfs_insert_dentry(struct mfs_node *mnode, const char *d_name, fs_index_t d_inum);
    189189
    190 /*mfs_balloc.c*/
     190/* mfs_balloc.c */
    191191extern int
    192192mfs_alloc_inode(struct mfs_instance *inst, uint32_t *inum);
     
    201201mfs_free_zone(struct mfs_instance *inst, uint32_t zone);
    202202
    203 /*mfs_utils.c*/
     203/* mfs_utils.c */
    204204extern uint16_t
    205205conv16(bool native, uint16_t n);
  • uspace/srv/fs/mfs/mfs_balloc.c

    r2f016df r24df3834  
    198198                limit = sbi->nzones - sbi->firstdatazone - 1;
    199199        } else {
    200                 /*bid == BMAP_INODE*/
     200                /* bid == BMAP_INODE */
    201201                search = &sbi->isearch;
    202202                start_block = 2;
     
    212212        for (i = *search / bits_per_block; i < nblocks; ++i) {
    213213                r = block_get(&b, inst->service_id, i + start_block,
    214                               BLOCK_FLAGS_NONE);
     214                    BLOCK_FLAGS_NONE);
    215215
    216216                if (r != EOK)
  • uspace/srv/fs/mfs/mfs_dentry.c

    r2f016df r24df3834  
    168168                return ENAMETOOLONG;
    169169
    170         /*Search the directory entry to be removed*/
     170        /* Search the directory entry to be removed */
    171171        unsigned i;
    172172        for (i = 0; i < mnode->ino_i->i_size / sbi->dirsize ; ++i) {
  • uspace/srv/fs/mfs/mfs_inode.c

    r2f016df r24df3834  
    235235
    236236        r = block_get(&b, mnode->instance->service_id,
    237                       itable_off + inum / sbi->ino_per_block,
    238                       BLOCK_FLAGS_NONE);
     237            itable_off + inum / sbi->ino_per_block,
     238            BLOCK_FLAGS_NONE);
    239239
    240240        if (r != EOK)
     
    278278
    279279        r = block_get(&b, mnode->instance->service_id,
    280                       itable_off + inum / sbi->ino_per_block,
    281                       BLOCK_FLAGS_NONE);
     280            itable_off + inum / sbi->ino_per_block,
     281            BLOCK_FLAGS_NONE);
    282282
    283283        if (r != EOK)
  • uspace/srv/fs/mfs/mfs_ops.c

    r2f016df r24df3834  
    664664        struct mfs_node *child = cfn->data;
    665665        struct mfs_sb_info *sbi = parent->instance->sbi;
     666        bool destroy_dentry = false;
    666667
    667668        mfsdebug("%s()\n", __FUNCTION__);
     
    672673        int r = mfs_insert_dentry(parent, name, child->ino_i->index);
    673674        if (r != EOK)
    674                 goto exit_error;
    675 
    676         child->ino_i->i_nlinks++;
    677         child->ino_i->dirty = true;
     675                return r;
    678676
    679677        if (S_ISDIR(child->ino_i->i_mode)) {
     678                if (child->ino_i->i_nlinks != 1) {
     679                        /* It's not possible to hardlink directories in MFS */
     680                        destroy_dentry = true;
     681                        r = EMLINK;
     682                        goto exit;
     683                }
    680684                r = mfs_insert_dentry(child, ".", child->ino_i->index);
    681                 if (r != EOK)
    682                         goto exit_error;
     685                if (r != EOK) {
     686                        destroy_dentry = true;
     687                        goto exit;
     688                }
    683689
    684690                r = mfs_insert_dentry(child, "..", parent->ino_i->index);
    685                 if (r != EOK)
    686                         goto exit_error;
     691                if (r != EOK) {
     692                        destroy_dentry = true;
     693                        goto exit;
     694                }
    687695
    688696                parent->ino_i->i_nlinks++;
     
    690698        }
    691699
    692 exit_error:
     700exit:
     701        if (destroy_dentry) {
     702                int r2 = mfs_remove_dentry(parent, name);
     703                if (r2 != EOK)
     704                        r = r2;
     705        } else {
     706                child->ino_i->i_nlinks++;
     707                child->ino_i->dirty = true;
     708        }
    693709        return r;
    694710}
     
    821837found:
    822838                async_data_read_finalize(callid, d_info.d_name,
    823                                         str_size(d_info.d_name) + 1);
     839                    str_size(d_info.d_name) + 1);
    824840                bytes = ((pos - spos) + 1);
    825841        } else {
  • uspace/srv/fs/mfs/mfs_rw.c

    r2f016df r24df3834  
    147147                                ino_i->dirty = true;
    148148                        } else {
    149                                 /*Sparse block*/
     149                                /* Sparse block */
    150150                                *b = 0;
    151151                                return EOK;
     
    233233}
    234234
    235 /**Free unused indirect zones from a MINIX inode according to it's new size.
     235/**Free unused indirect zones from a MINIX inode according to its new size.
    236236 *
    237237 * @param mnode         Pointer to a generic MINIX inode in memory.
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