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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [coda/] [inode.c] - Blame information for rev 1765

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/*
 * Super block/filesystem wide operations
 *
 * Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk> and
 * Michael Callahan <callahan@maths.ox.ac.uk>
 *
 * Rewritten for Linux 2.1.  Peter Braam <braam@cs.cmu.edu>
 * Copyright (C) Carnegie Mellon University
 */
 
#define __NO_VERSION__
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/errno.h>
#include <linux/locks.h>
#include <linux/unistd.h>
#include <linux/smp_lock.h>
#include <linux/file.h>
 
#include <asm/system.h>
#include <asm/uaccess.h>
 
#include <linux/fs.h>
#include <linux/vmalloc.h>
 
#include <linux/coda.h>
#include <linux/coda_linux.h>
#include <linux/coda_psdev.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_cache.h>
 
/* VFS super_block ops */
static struct super_block *coda_read_super(struct super_block *, void *, int);
static void coda_read_inode(struct inode *);
static void coda_clear_inode(struct inode *);
static void coda_put_super(struct super_block *);
static int coda_statfs(struct super_block *sb, struct statfs *buf);
 
/* exported operations */
struct super_operations coda_super_operations =
{
        read_inode:     coda_read_inode,
        clear_inode:    coda_clear_inode,
        put_super:      coda_put_super,
        statfs:         coda_statfs,
};
 
static int get_device_index(struct coda_mount_data *data)
{
        struct file *file;
        struct inode *inode;
        int idx;
 
        if(data == NULL) {
                printk("coda_read_super: Bad mount data\n");
                return -1;
        }
 
        if(data->version != CODA_MOUNT_VERSION) {
                printk("coda_read_super: Bad mount version\n");
                return -1;
        }
 
        file = fget(data->fd);
        inode = NULL;
        if(file)
                inode = file->f_dentry->d_inode;
 
        if(!inode || !S_ISCHR(inode->i_mode) ||
           MAJOR(inode->i_rdev) != CODA_PSDEV_MAJOR) {
                if(file)
                        fput(file);
 
                printk("coda_read_super: Bad file\n");
                return -1;
        }
 
        idx = MINOR(inode->i_rdev);
        fput(file);
 
        if(idx < 0 || idx >= MAX_CODADEVS) {
                printk("coda_read_super: Bad minor number\n");
                return -1;
        }
 
        return idx;
}
 
static struct super_block * coda_read_super(struct super_block *sb,
                                            void *data, int silent)
{
        struct inode *root = 0;
        struct coda_sb_info *sbi = NULL;
        struct venus_comm *vc = NULL;
        ViceFid fid;
        int error;
        int idx;
 
        idx = get_device_index((struct coda_mount_data *) data);
 
        /* Ignore errors in data, for backward compatibility */
        if(idx == -1)
                idx = 0;
 
        printk(KERN_INFO "coda_read_super: device index: %i\n", idx);
 
        vc = &coda_comms[idx];
        if (!vc->vc_inuse) {
                printk("coda_read_super: No pseudo device\n");
                return NULL;
        }
 
        if ( vc->vc_sb ) {
                printk("coda_read_super: Device already mounted\n");
                return NULL;
        }
 
        sbi = kmalloc(sizeof(struct coda_sb_info), GFP_KERNEL);
        if(!sbi) {
                return NULL;
        }
 
        vc->vc_sb = sb;
 
        sbi->sbi_sb = sb;
        sbi->sbi_vcomm = vc;
        INIT_LIST_HEAD(&sbi->sbi_cihead);
        init_MUTEX(&sbi->sbi_iget4_mutex);
 
        sb->u.generic_sbp = sbi;
        sb->s_blocksize = 1024; /* XXXXX  what do we put here?? */
        sb->s_blocksize_bits = 10;
        sb->s_magic = CODA_SUPER_MAGIC;
        sb->s_op = &coda_super_operations;
 
        /* get root fid from Venus: this needs the root inode */
        error = venus_rootfid(sb, &fid);
        if ( error ) {
                printk("coda_read_super: coda_get_rootfid failed with %d\n",
                       error);
                goto error;
        }
        printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid));
 
        /* make root inode */
        error = coda_cnode_make(&root, &fid, sb);
        if ( error || !root ) {
            printk("Failure of coda_cnode_make for root: error %d\n", error);
            goto error;
        }
 
        printk("coda_read_super: rootinode is %ld dev %d\n",
               root->i_ino, root->i_dev);
        sb->s_root = d_alloc_root(root);
        return sb;
 
 error:
        if (sbi) {
                kfree(sbi);
                if(vc)
                        vc->vc_sb = NULL;
        }
        if (root)
                iput(root);
 
        return NULL;
}
 
static void coda_put_super(struct super_block *sb)
{
        struct coda_sb_info *sbi;
 
        sbi = coda_sbp(sb);
        sbi->sbi_vcomm->vc_sb = NULL;
        list_del_init(&sbi->sbi_cihead);
 
        printk("Coda: Bye bye.\n");
        kfree(sbi);
}
 
/* all filling in of inodes postponed until lookup */
static void coda_read_inode(struct inode *inode)
{
        struct coda_sb_info *sbi = coda_sbp(inode->i_sb);
        struct coda_inode_info *cii;
 
        if (!sbi) BUG();
 
        cii = ITOC(inode);
        if (!coda_isnullfid(&cii->c_fid)) {
            printk("coda_read_inode: initialized inode");
            return;
        }
 
        cii->c_mapcount = 0;
        list_add(&cii->c_cilist, &sbi->sbi_cihead);
}
 
static void coda_clear_inode(struct inode *inode)
{
        struct coda_inode_info *cii = ITOC(inode);
 
        CDEBUG(D_SUPER, " inode->ino: %ld, count: %d\n",
               inode->i_ino, atomic_read(&inode->i_count));
        CDEBUG(D_DOWNCALL, "clearing inode: %ld, %x\n", inode->i_ino, cii->c_flags);
 
        list_del_init(&cii->c_cilist);
        coda_cache_clear_inode(inode);
}
 
int coda_notify_change(struct dentry *de, struct iattr *iattr)
{
        struct inode *inode = de->d_inode;
        struct coda_vattr vattr;
        int error;
 
        memset(&vattr, 0, sizeof(vattr));
 
        inode->i_ctime = CURRENT_TIME;
        coda_iattr_to_vattr(iattr, &vattr);
        vattr.va_type = C_VNON; /* cannot set type */
        CDEBUG(D_SUPER, "vattr.va_mode %o\n", vattr.va_mode);
 
        /* Venus is responsible for truncating the container-file!!! */
        error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
 
        if ( !error ) {
                coda_vattr_to_iattr(inode, &vattr);
                coda_cache_clear_inode(inode);
        }
        CDEBUG(D_SUPER, "inode.i_mode %o, error %d\n", inode->i_mode, error);
 
        return error;
}
 
struct inode_operations coda_file_inode_operations = {
        permission:     coda_permission,
        revalidate:     coda_revalidate_inode,
        setattr:        coda_notify_change,
};
 
static int coda_statfs(struct super_block *sb, struct statfs *buf)
{
        int error;
 
        error = venus_statfs(sb, buf);
 
        if (error) {
                /* fake something like AFS does */
                buf->f_blocks = 9000000;
                buf->f_bfree  = 9000000;
                buf->f_bavail = 9000000;
                buf->f_files  = 9000000;
                buf->f_ffree  = 9000000;
        }
 
        /* and fill in the rest */
        buf->f_type = CODA_SUPER_MAGIC;
        buf->f_bsize = 1024;
        buf->f_namelen = CODA_MAXNAMLEN;
 
        return 0;
}
 
/* init_coda: used by filesystems.c to register coda */
 
DECLARE_FSTYPE( coda_fs_type, "coda", coda_read_super, 0);
 

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [coda/] [inode.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* Super block/filesystem wide operations`
3			`*`
4			`* Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk> and`
5			`* Michael Callahan <callahan@maths.ox.ac.uk>`
6			`*`
7			`* Rewritten for Linux 2.1. Peter Braam <braam@cs.cmu.edu>`
8			`* Copyright (C) Carnegie Mellon University`
9			`*/`
10
11			`#define __NO_VERSION__`
12			`#include <linux/module.h>`
13			`#include <linux/kernel.h>`
14			`#include <linux/mm.h>`
15			`#include <linux/string.h>`
16			`#include <linux/stat.h>`
17			`#include <linux/errno.h>`
18			`#include <linux/locks.h>`
19			`#include <linux/unistd.h>`
20			`#include <linux/smp_lock.h>`
21			`#include <linux/file.h>`
22
23			`#include <asm/system.h>`
24			`#include <asm/uaccess.h>`
25
26			`#include <linux/fs.h>`
27			`#include <linux/vmalloc.h>`
28
29			`#include <linux/coda.h>`
30			`#include <linux/coda_linux.h>`
31			`#include <linux/coda_psdev.h>`
32			`#include <linux/coda_fs_i.h>`
33			`#include <linux/coda_cache.h>`
34
35			`/* VFS super_block ops */`
36			`static struct super_block coda_read_super(struct super_block , void *, int);`
37			`static void coda_read_inode(struct inode *);`
38			`static void coda_clear_inode(struct inode *);`
39			`static void coda_put_super(struct super_block *);`
40			`static int coda_statfs(struct super_block sb, struct statfs buf);`
41
42			`/* exported operations */`
43			`struct super_operations coda_super_operations =`
44			`{`
45			`read_inode: coda_read_inode,`
46			`clear_inode: coda_clear_inode,`
47			`put_super: coda_put_super,`
48			`statfs: coda_statfs,`
49			`};`
50
51			`static int get_device_index(struct coda_mount_data *data)`
52			`{`
53			`struct file *file;`
54			`struct inode *inode;`
55			`int idx;`
56
57			`if(data == NULL) {`
58			`printk("coda_read_super: Bad mount data\n");`
59			`return -1;`
60			`}`
61
62			`if(data->version != CODA_MOUNT_VERSION) {`
63			`printk("coda_read_super: Bad mount version\n");`
64			`return -1;`
65			`}`
66
67			`file = fget(data->fd);`
68			`inode = NULL;`
69			`if(file)`
70			`inode = file->f_dentry->d_inode;`
71
72			`if(!inode \|\| !S_ISCHR(inode->i_mode) \|\|`
73			`MAJOR(inode->i_rdev) != CODA_PSDEV_MAJOR) {`
74			`if(file)`
75			`fput(file);`
76
77			`printk("coda_read_super: Bad file\n");`
78			`return -1;`
79			`}`
80
81			`idx = MINOR(inode->i_rdev);`
82			`fput(file);`
83
84			`if(idx < 0 \|\| idx >= MAX_CODADEVS) {`
85			`printk("coda_read_super: Bad minor number\n");`
86			`return -1;`
87			`}`
88
89			`return idx;`
90			`}`
91
92			`static struct super_block * coda_read_super(struct super_block *sb,`
93			`void *data, int silent)`
94			`{`
95			`struct inode *root = 0;`
96			`struct coda_sb_info *sbi = NULL;`
97			`struct venus_comm *vc = NULL;`
98			`ViceFid fid;`
99			`int error;`
100			`int idx;`
101
102			`idx = get_device_index((struct coda_mount_data *) data);`
103
104			`/* Ignore errors in data, for backward compatibility */`
105			`if(idx == -1)`
106			`idx = 0;`
107
108			`printk(KERN_INFO "coda_read_super: device index: %i\n", idx);`
109
110			`vc = &coda_comms[idx];`
111			`if (!vc->vc_inuse) {`
112			`printk("coda_read_super: No pseudo device\n");`
113			`return NULL;`
114			`}`
115
116			`if ( vc->vc_sb ) {`
117			`printk("coda_read_super: Device already mounted\n");`
118			`return NULL;`
119			`}`
120
121			`sbi = kmalloc(sizeof(struct coda_sb_info), GFP_KERNEL);`
122			`if(!sbi) {`
123			`return NULL;`
124			`}`
125
126			`vc->vc_sb = sb;`
127
128			`sbi->sbi_sb = sb;`
129			`sbi->sbi_vcomm = vc;`
130			`INIT_LIST_HEAD(&sbi->sbi_cihead);`
131			`init_MUTEX(&sbi->sbi_iget4_mutex);`
132
133			`sb->u.generic_sbp = sbi;`
134			`sb->s_blocksize = 1024; /* XXXXX what do we put here?? */`
135			`sb->s_blocksize_bits = 10;`
136			`sb->s_magic = CODA_SUPER_MAGIC;`
137			`sb->s_op = &coda_super_operations;`
138
139			`/* get root fid from Venus: this needs the root inode */`
140			`error = venus_rootfid(sb, &fid);`
141			`if ( error ) {`
142			`printk("coda_read_super: coda_get_rootfid failed with %d\n",`
143			`error);`
144			`goto error;`
145			`}`
146			`printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid));`
147
148			`/* make root inode */`
149			`error = coda_cnode_make(&root, &fid, sb);`
150			`if ( error \|\| !root ) {`
151			`printk("Failure of coda_cnode_make for root: error %d\n", error);`
152			`goto error;`
153			`}`
154
155			`printk("coda_read_super: rootinode is %ld dev %d\n",`
156			`root->i_ino, root->i_dev);`
157			`sb->s_root = d_alloc_root(root);`
158			`return sb;`
159
160			`error:`
161			`if (sbi) {`
162			`kfree(sbi);`
163			`if(vc)`
164			`vc->vc_sb = NULL;`
165			`}`
166			`if (root)`
167			`iput(root);`
168
169			`return NULL;`
170			`}`
171
172			`static void coda_put_super(struct super_block *sb)`
173			`{`
174			`struct coda_sb_info *sbi;`
175
176			`sbi = coda_sbp(sb);`
177			`sbi->sbi_vcomm->vc_sb = NULL;`
178			`list_del_init(&sbi->sbi_cihead);`
179
180			`printk("Coda: Bye bye.\n");`
181			`kfree(sbi);`
182			`}`
183
184			`/* all filling in of inodes postponed until lookup */`
185			`static void coda_read_inode(struct inode *inode)`
186			`{`
187			`struct coda_sb_info *sbi = coda_sbp(inode->i_sb);`
188			`struct coda_inode_info *cii;`
189
190			`if (!sbi) BUG();`
191
192			`cii = ITOC(inode);`
193			`if (!coda_isnullfid(&cii->c_fid)) {`
194			`printk("coda_read_inode: initialized inode");`
195			`return;`
196			`}`
197
198			`cii->c_mapcount = 0;`
199			`list_add(&cii->c_cilist, &sbi->sbi_cihead);`
200			`}`
201
202			`static void coda_clear_inode(struct inode *inode)`
203			`{`
204			`struct coda_inode_info *cii = ITOC(inode);`
205
206			`CDEBUG(D_SUPER, " inode->ino: %ld, count: %d\n",`
207			`inode->i_ino, atomic_read(&inode->i_count));`
208			`CDEBUG(D_DOWNCALL, "clearing inode: %ld, %x\n", inode->i_ino, cii->c_flags);`
209
210			`list_del_init(&cii->c_cilist);`
211			`coda_cache_clear_inode(inode);`
212			`}`
213
214			`int coda_notify_change(struct dentry de, struct iattr iattr)`
215			`{`
216			`struct inode *inode = de->d_inode;`
217			`struct coda_vattr vattr;`
218			`int error;`
219
220			`memset(&vattr, 0, sizeof(vattr));`
221
222			`inode->i_ctime = CURRENT_TIME;`
223			`coda_iattr_to_vattr(iattr, &vattr);`
224			`vattr.va_type = C_VNON; /* cannot set type */`
225			`CDEBUG(D_SUPER, "vattr.va_mode %o\n", vattr.va_mode);`
226
227			`/* Venus is responsible for truncating the container-file!!! */`
228			`error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);`
229
230			`if ( !error ) {`
231			`coda_vattr_to_iattr(inode, &vattr);`
232			`coda_cache_clear_inode(inode);`
233			`}`
234			`CDEBUG(D_SUPER, "inode.i_mode %o, error %d\n", inode->i_mode, error);`
235
236			`return error;`
237			`}`
238
239			`struct inode_operations coda_file_inode_operations = {`
240			`permission: coda_permission,`
241			`revalidate: coda_revalidate_inode,`
242			`setattr: coda_notify_change,`
243			`};`
244
245			`static int coda_statfs(struct super_block sb, struct statfs buf)`
246			`{`
247			`int error;`
248
249			`error = venus_statfs(sb, buf);`
250
251			`if (error) {`
252			`/* fake something like AFS does */`
253			`buf->f_blocks = 9000000;`
254			`buf->f_bfree = 9000000;`
255			`buf->f_bavail = 9000000;`
256			`buf->f_files = 9000000;`
257			`buf->f_ffree = 9000000;`
258			`}`
259
260			`/* and fill in the rest */`
261			`buf->f_type = CODA_SUPER_MAGIC;`
262			`buf->f_bsize = 1024;`
263			`buf->f_namelen = CODA_MAXNAMLEN;`
264
265			`return 0;`
266			`}`
267
268			`/* init_coda: used by filesystems.c to register coda */`
269
270			`DECLARE_FSTYPE( coda_fs_type, "coda", coda_read_super, 0);`
271